Title:
System and method for identifying and exploiting quality information associated with a web converting manufacturing process
Document Type and Number:
Kind Code:
A1

Abstract:
Systems and methods for identifying, tracking and exploiting quality information in connection with a web converting manufacturing process such as that used for manufacturing disposable absorbent garments. Some of the disclosed embodiments include relating inspection data, such as product (or process) attribute data, to data from other manufacturing-related systems. Also disclosed are systems and methods for linking product (or process) attribute data obtained during the manufacturing process with one or more data sources including raw material data, process setting data, product quality data, and/or productivity data. Also disclosed are systems and methods for identifying manufacturing set point changes and automatically implementing such changes and automated web steering changes based on data from one or more inspection systems.
Inventors:
Popp, Robert L. (Hortonville, WI, US)
Allen, Kyle S. (Neenah, WI, US)
Henry II, Carbone L. (St. Paul, MN, US)
Chapple, Scott G. (Neenah, WI, US)
Dollevoet, Tim G. (Kimberly, WI, US)
Hein, John G. (Appleton, WI, US)
Quereshi, Shawn A. (Neenah, WI, US)
Tremble, Erica C. (Appleton, WI, US)
      Plaque It!

Sponsored by:
Flash of Genius
Application Number:
10/299107
Publication Date:
02/12/2004
Filing Date:
11/18/2002
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Primary Class:
International Classes:
(IPC1-7): G06F019/00
Attorney, Agent or Firm:
Senniger, Powers Leavitt And Roedel (ONE METROPOLITAN SQUARE, ST LOUIS, MO, 63102, US)
Claims:

What is claimed is:



1. A quality information system suitable for use in connection with a high speed web converting manufacturing process for manufacturing composite product from a sequential addition of component parts during a production run of product, said component parts including a component added as a continuous web of material and a component added as a discontinuous web of material, said quality information system comprising: an inspection system for automatically inspecting a quality aspect of a sample set of composite products produced during the production run and providing quality parameters associated with said inspected aspect, said provided quality parameters being correlated to the inspected composite products produced during the production run; and a quality data subsystem obtaining and storing a plurality of the provided quality parameters.

2. A quality information system as set forth in claim 1 wherein the sample set of composite products automatically inspected by the inspection system comprises substantially all composite products produced during the production run.

3. A quality information system as set forth in claim 1 wherein at least one component part comprises a web of material and wherein the inspection system comprises a machine vision inspection system.

4. A quality information system as set forth in claim 1 wherein the inspection system is constructed and arranged for inspecting substantially all points on the inspected composite products produced during the production run.

5. A quality information system as set forth in claim 1 wherein the inspection system provides an indication of whether an inspected composite product has been culled.

6. A quality information system as set forth in claim 5 wherein the quality data subsystem does not store quality parameters associated with culled composite products.

7. A quality information system as set forth in claim 5 wherein the quality data subsystem stores quality parameters associated with non-culled and culled composite products, said quality data subsystem identifying a first data population set associated with the stored quality parameters associated with non-culled composite products and identifying a second data population set associated with the stored quality parameters associated with culled composite products.

8. A quality information system as set forth in claim 1 wherein the plurality of quality parameters stored by the quality data subsystem comprises a sample set of quality parameters provided by the inspection system.

9. A quality information system as set forth in claim 8 wherein the sample set of quality parameters corresponds to a representative population of composite products produced during the production run packaged for sale.

10. A quality information system as set forth in claim 1 wherein the quality data subsystem is configured such that the quality determination comprises a quality report providing an indication of the stored plurality of quality parameters.

11. A quality information system as set forth in claim 10 further comprising an operator display, said operator display being responsive to the quality report for selectively displaying the indication of the stored plurality of quality parameters.

12. A quality information system as set forth in claim 10 wherein the quality data subsystem does not store quality parameters associated with culled composite products and wherein the quality report correlates each quality parameter associated with each non-culled product during a production run with a package code, said package code identifying a package into which the non-culled product is packaged.

13. A quality information system as set forth in claim 12 wherein the quality data subsystem is configured such that the package code is a bag code, said bag code identifying an individual package of a plurality of composite products packaged for retail sale.

14. A quality information system as set forth in claim 12 wherein the quality data subsystem is configured such that the package code is a case code, said case code identifying a plurality of individual packages of composite products packaged in a single case.

15. A quality information system as set forth in claim 12 wherein the quality data subsystem is configured such that the quality report further indicates whether a package includes any composite products that have been repacked from prior packages.

16. A quality information system as set forth in claim 1 wherein the inspection system is configured such that no destructive tests are performed by the inspection system as part of automatically inspecting said quality aspect.

17. A quality information system as set forth in claim 1 further comprising: a raw material database having raw material data stored therein relating to at least one of the component parts forming the composite product; and an information exchange system obtaining raw material data from the raw material database, said information exchange system relating the obtained raw material data to the stored plurality of quality parameters whereby contributions to product quality attributable to raw material can be made.

18. A quality information system as set forth in claim 1 further comprising: a productivity database having productivity data stored therein relating to the production of a plurality of composite products produced on the production line; and an information exchange system obtaining productivity data from the productivity database, said information exchange system relating the obtained productivity data to the stored plurality of quality parameters whereby productivity data can be correlated to said plurality of quality parameters.

19. A quality information system as set forth in claim 1 further comprising: a process setting database having process set point data stored therein relating to at least one manufacturing machine setting associated with the production line; and an information exchange system obtaining set point data from the process setting database, said information exchange system relating the obtained set point data to the stored plurality of quality parameters whereby contributions to product quality attributable to process set points can be made.

20. A quality information system as set forth in claim 1 wherein the quality data subsystem stores quality parameters for each inspected composite product produced during the production run.

21. A quality information system as set forth in claim 1 wherein the quality data subsystem stores quality parameters for substantially all non-culled composite products produced.

22. A quality information system as set forth in claim 1 wherein the quality data subsystem stores quality parameters for a sample set of composite products produced.

23. A quality information system as set forth in claim 1 further comprising a raw material database having raw material data stored therein relating to one of the component parts forming the composite product, and wherein the quality data subsystem correlates said raw material data relating to one of the component parts to the stored plurality of provided quality parameters.

24. A quality information system as set forth in claim 1 further comprising a productivity database having productivity data stored therein relating to production of composite products produced on the production line during the production run, and wherein the quality data subsystem correlates said productivity data to the stored plurality of provided quality parameters.

25. A quality information system as set forth in claim 1 further comprising a process setting database having process set point data stored therein relating to at least one manufacturing machine associated with the production line producing composite products during the production run, and wherein the quality data subsystem correlates said process set point data to the stored plurality of provided quality parameters.

26. A quality information system as set forth in claim 1 further comprising: a communication network; an information exchange system obtaining via the communication network quality parameters provided by the inspection system, wherein said quality data subsystem obtains the plurality of provided quality parameters from the information exchange system.

27. A quality information system as set forth in claim 26 wherein the communication network comprises a distributed node, shared memory system and the inspection system and information exchange system comprise separate nodes of the communication network.

28. A quality information system as set forth in claim 1 wherein the inspection system comprises a machine vision system and the quality aspect comprises a measurement of a placement of a first component part relative to a second component part of the composite product.

29. A quality information system as set forth in claim 1 wherein the inspection system comprises a machine vision system and the quality aspect comprises an absolute measurement of a placement position of a component part of the composite product.

30. A quality information system as set forth in claim 1 wherein the inspection system comprises: a machine vision inspection system positioned for obtaining an image of a component part of the composite product on the production line and wherein the inspected quality aspect comprises a placement of the component part, said machine vision system being configured to provide inspection parameter indicative of the placement of said component part; and an information exchange system obtaining a plurality of the provided inspection parameters, each associated with one of a plurality of composite products inspected during the production run, said information exchange system determining the provided quality parameters as a function of a difference between the obtained plurality of the provided inspection parameters and a target, and said information exchange system providing the quality parameters for use by the quality data subsystem.

31. A quality information system as set forth in claim 30 wherein the information exchange system determines a mathematical characteristic of the obtained plurality of provided inspection parameters and compares said determined mathematical characteristic to the target, said information exchange system determining the provided quality parameters as a function of a difference between the mathematical characteristic and the target.

32. A quality information system as set forth in claim 31 wherein the mathematical characteristic comprises an average of the obtained plurality of provided inspection parameters.

33. A quality information system as set forth in claim 31 wherein the mathematical characteristic comprises a standard deviation of the plurality of provided parameters.

34. A quality information system as set forth in claim 1 further comprising an operator display and wherein the quality data subsystem is configured such that the quality determination is a quality report providing an indication of a trend associated with stored plurality of quality parameters for display on the operator display.

35. A quality system as set forth in claim 1 further comprising a database system, said database system being configured for storing the provided quality parameters.

36. A quality system as set forth in claim 35 wherein the database system is further configured for storing productivity data associated with the production run such that relationships between the stored quality parameters and the stored productivity data can be determined.

37. A quality system as set forth in claim 35 wherein the database system is further configured for storing process setting data associated with the web converting process such that relationships between the stored quality parameters and the stored process setting data can be determined.

38. A quality system as set forth in claim 35 wherein the database system is further configured for storing raw material data associated with one or more component parts of the composite products produced during the production run such that relationships between the stored quality parameters and the stored raw material data can be determined.

39. A quality system as set forth in claim 35 wherein the database system is further configured for storing manually measured quality data associated with one or more of the composite products produced during the production run such that relationships between the stored quality parameters and the stored manually measured quality data can be determined.

40. A method of providing quality information suitable for use in connection with a high speed web converting manufacturing process for manufacturing a composite product during a production run from a sequential addition of component parts, said component parts including a part added as a continuous web of material and a part added as a discontinuous web of material, said method comprising: automatically inspecting a quality aspect of a sample set of composite products manufactured during the production run; providing a quality parameter associated with the automatically inspected quality aspect of the inspected composite products; correlating the quality parameter to the inspected composite products; and selectively storing the correlated quality parameter in a quality data subsystem.

41. A method as set forth in claim 40 wherein automatically inspecting the quality aspect of the sample set of composite products manufactured during the production run comprises inspecting substantially all composite products manufactured during the production run.

42. A method as set forth in claim 40 wherein automatically inspecting the quality aspect comprises providing a machine vision system for automatically inspecting the quality aspect, said machine vision system being configured for detecting substantially all points of each composite product inspected during the production run.

43. A method as set forth in claim 40 further comprising providing an indication of whether a particular composite product manufactured during the production run was culled.

44. A method as set forth in claim 43 wherein selectively storing the correlated quality parameter comprises storing quality parameters correlated to non-culled products.

45. A method as set forth in claim 43 further comprising: identifying a first data population set being associated with the non-culled composite products; and identifying a second data population set being associated with culled composite products wherein selectively storing the correlated quality parameter comprises storing said quality parameter in the first data population set if said quality parameter correlates to a non-culled product and storing said quality parameter in the second data population if said quality parameter correlates to a culled product.

46. A method as set forth in claim 40 further comprising defining a population of composite products manufactured during the production run being packaged for distribution and wherein correlating the quality parameter further comprises correlating the quality parameter to said population of composite products.

47. A method as set forth in claim 40 further comprising providing a quality determination comprising a quality report based on the stored correlated quality parameters.

48. A method as set forth in claim 47 further comprising displaying the quality report on an operator display.

49. A method as set forth in claim 48 wherein displaying the quality report on the operator display comprises displaying the quality report in real time.

50. A method as set forth in claim 47 wherein providing the quality report comprises providing an indication of the provided quality parameter.

51. A method as set forth in claim 47 wherein providing the quality report comprises providing an indication of the provided quality parameter relative to a standard.

52. A method as set forth in claim 47 wherein selectively storing the correlated quality parameter comprises storing quality parameters correlated to non-culled products and wherein providing the quality report comprises correlating each stored quality parameter with a package code, said package code identifying a package associated with a plurality of non-culled products.

53. A method as set forth in claim 52 wherein the package code is a bag code identifying an individual package containing a plurality of non-culled composite products.

54. A method as set forth in claim 52 wherein the package code is a case code, said case code identifying a group of individual packages each of which contains a plurality of non-culled composite products.

55. A method as set forth in claim 52 further comprising tracking any non-culled products that have been re-packed.

56. A method as set forth in claim 40 wherein automatically inspecting the quality aspect comprises only non-destructive testing.

57. A method as set forth in claim 40 further comprising: providing a raw material database having raw material data stored therein relating to at least one of the component parts forming the composite product; and relating said raw material data to the stored quality parameter, whereby contributions to product quality attributable to raw material can be assessed.

58. A method as set forth in claim 40 further comprising: providing a productivity database having productivity data stored therein relating to the production of a plurality of composite products; and relating said productivity data to the stored quality parameter.

59. A method as set forth in claim 40 further comprising: providing a process setting database having process set point data stored therein relating to at least one manufacturing machine setting associated with the production line; and relating said process set point data to the stored quality parameter, whereby contributions to product quality attributable to process set points can be assessed.

60. A method as set forth in claim 40 wherein selectively storing the correlated quality parameter in a quality data subsystem comprises storing a quality parameter for substantially all composite products manufactured during the production run.

61. A method as set forth in claim 40 wherein selectively storing the correlated quality parameter in a quality data subsystem comprises storing a quality parameter for each non-culled composite products manufactured during the production run.

62. A method as set forth in claim 40 further comprising: providing a raw material database having raw material data stored therein relating to one of the component parts forming the composite product; and wherein selectively storing the correlated quality parameter in a quality data subsystem comprises integrating said raw material data with the stored quality parameter.

63. A method as set forth in claim 40 wherein automatically inspecting a quality aspect of the composite products comprises measuring with a machine vision system a placement of a first component of each composite product inspected relative to a second component of each composite product being inspected.

64. A method as set forth in claim 40 wherein automatically inspecting a quality aspect of the composite products comprises measuring with a machine vision system an absolute measurement of a placement position of a component part of each composite product being inspected.

65. A method as set forth in claim 40 wherein automatically inspecting a quality aspect of the composite products comprises positioning a machine vision system for obtaining an image of a component part of each composite product inspected on the production line, said machine vision system providing an inspection parameter indicative of a placement of said component part.

66. A method as set forth in claim 65 further comprising: obtaining at an information exchange system the provided inspection parameter; comparing the provided inspection parameter to a target; and determining the quality parameter as a function of a difference between the provided inspection parameter and the target, and wherein said information exchange system provides the quality parameter.

67. A method as set forth in claim 65 further comprising: obtaining at an information exchange system a plurality of provided inspection parameters indicative of the placement of the component part corresponding to a plurality of composite products inspected during the production run; computing a mathematical characteristic of said plurality of provided parameters; comparing said mathematical characteristic to a target; and determining the quality parameter as a function of a difference between the mathematical characteristic and the target, and wherein said information exchange system provides the quality parameter.

68. A method as set forth in claim 67 wherein computing the mathematical characteristic comprises computing an average of the plurality of provided parameters.

69. A method as set forth in claim 67 wherein computing the mathematical characteristic comprises computing a standard deviation of the plurality of provided inspection parameters.

70. A method as set forth in claim 40 further comprising storing the correlated quality parameter in an integrated database system.

71. A method as set forth in claim 70 further comprising storing productivity data associated with the production run in said database system and determining relationships between the stored quality parameter and the stored productivity data.

72. A method as set forth in claim 70 further comprising storing process setting data associated with the web converting process in said database system and determining relationships between the stored quality parameter and the stored process setting data.

73. A method as set forth in claim 70 further comprising storing in said database system raw material data associated with one or more component parts of the composite products manufactured during the production run and determining relationships between the stored quality parameter and the stored raw material data.

74. A method as set forth in claim 70 further comprising manually measuring quality data associated with one or more of the composite products manufactured during the production run, storing said manually measured quality data in said database system, and determining relationships between the stored quality parameter and the stored manually measured quality data.

75. A method as set forth in claim 40 wherein providing the quality parameter comprises providing a plurality of quality parameters, each of said plurality of quality parameters corresponding to one of the sample set of composite products manufactured during the production run, and said method further comprising determining a statistical representation of a quality characteristic of substantially all of the products manufactured during the production run by statistically manipulating the plurality of quality parameters.

76. A quality information system, suitable for use in connection with a manufacturing production line producing a composite product from a sequential addition of component parts during a production run, said component parts including a component added as a continuous web of material and a component added as a discontinuous web of material, said quality information system comprising: a communication network; an inspection system for automatically inspecting a quality aspect of a composite product produced during the production run, said inspection system providing an inspection parameter associated with said inspected aspect, said inspection parameter being correlated to an inspected composite product; an information exchange system obtaining via the communication network the inspection parameter, said information exchange determining a quality parameter associated with the inspection parameter; and a quality system obtaining the quality parameter via the communication network, said quality system storing the quality parameter.

77. A real time quality information system as set forth in claim 76 wherein the information exchange system obtains a plurality of inspection parameters, each being correlated to one a plurality of composite products, said information exchange system determining a mathematical characteristic of said obtained plurality of inspection parameters whereby the quality parameter is determined as a function of the mathematical characteristic.

78. A real time quality information system as set forth in claim 77 wherein the information exchange system is configured such that the mathematical characteristic comprises an average of the obtained plurality of inspection parameters.

79. A real time quality information system as set forth in claim 77 wherein the information exchange system is configured such that the mathematical characteristic comprises a standard deviation of the obtained plurality of inspection parameters.

80. A real time quality information system as set forth in claim 77 wherein the information exchange system is configured to compare the mathematical characteristic to a target and the quality parameter comprises a difference between the mathematical characteristic and the target.

81. A real time quality information system as set forth in claim 77 wherein the quality system is configured to compare the quality parameter provided by the information exchange system to a target and the quality determination comprises determining a difference between the quality parameter and the target.

82. A real time quality information system as set forth in claim 76 wherein the information exchange system is configured to filter inspection parameters correlated to culled composite products such that the information exchange system provides quality parameters only for non-culled composite products.

83. A real time quality information system as set forth in claim 76 further comprising: an operator console obtaining the quality parameter from the quality system via the communication network and displaying the quality parameter in real time.

84. A real time quality information system as set forth in claim 83 wherein the communication network comprises a distributed node, shared memory system and wherein the inspection system, the information exchange system, the quality system, and the operator console comprise nodes of said communication network.

85. A method of adjusting a manufacturing process set point associated with a high speed web converting manufacturing process manufacturing a composite product from a sequential addition of component parts, said method comprising: providing a raw material database having quality data stored therein correlated to a raw material used to supply at least one component part of the composite product; accessing the raw material database and extracting the quality data therefrom; obtaining the extracted quality data; determining an adjustment to the manufacturing set point as a function of the extracted quality data; and adjusting the manufacturing process set point as a function of said determined adjustment to the manufacturing set point.

86. A method as set forth in claim 85 further comprising providing determined adjustment to the manufacturing set point to an operator associated with the manufacturing process, and wherein adjusting the manufacturing process set point comprises manually adjusting said set point by said operator.

87. A method as set forth in claim 85 wherein adjusting the manufacturing process set point comprises automatically adjusting said set point.

Description:

CROSS-REFERENCE TO RELATED APPLICATION

[0001] The invention of the present application is related to and claims priority to provisional U.S. patent application serial No. 60/401,805, entitled INFORMATION EXCHANGE, filed on Aug. 7, 2002, the entire disclosure of which is incorporated herein by reference.

FIELD OF THE INVENTION

[0002] The present invention relates generally to systems and methods associated with inspecting composite products produced using one or more web converting manufacturing processes. More particularly, the invention relates to systems and methods for identifying, correlating, and/or exploiting quality information associated with products produced using a web converting manufacturing process.

BACKGROUND OF THE INVENTION

[0003] Articles such as disposable absorbent garments have numerous applications including diapers, training pants, feminine care products, and adult incontinence products. A typical disposable absorbent garment is formed as a composite structure including an absorbent assembly disposed between a liquid permeable bodyside liner and a liquid impermeable outer cover. These components can be combined with other materials and features such as elastic materials and containment structures to form a product which is specifically suited to its intended purposes. A number of such garments include fastening components which are intended to be connected together (e.g., pre-fastened) during manufacture of the garment so that the product is packaged in its fully assembled form.

[0004] For example, one such pre-fastened garment includes child's training pants, which have a central absorbent chassis and front and back side panels extending laterally out from the chassis adjacent longitudinally opposite ends thereof. A portion of each of the front and back side panels has a respective fastening component disposed thereon. During manufacture of the training pants, the central absorbent chassis is initially formed generally flat and then folded over so that the front and back side panels face each other. The respective fastening components of the front and back side panels are then aligned and connected together to define an engagement seam. Upon securing the front and back side panel fastening components together, the pre-fastened pair of training pants is in its fully assembled three-dimensional form having an interior space bounded in part by the engagement seam.

[0005] For a variety of purposes, including quality control, process control, material control, and so on, it is often desirable to monitor the presence of and/or interrelationships between one or more elements of a disposable absorbent garment. For instance, elements such as outer covers, liners, absorbent pads, side panels, elastic components, fastener components, etc. must be positioned or aligned with respect to each other and/or to other components as desired or otherwise intended in order to produce an acceptable product. Accordingly, inspection systems are commonly used to detect the presence and/or relative positions of such components during manufacturing. If an inspection system determines that one or more components are out of position and thus do not properly register with other components, the inspection system typically outputs one or more signals indicating that certain articles should be culled and discarded, that the process should be adjusted so as to bring out-of-position components into proper position, that the process should be adjusted so that subsequent components are brought into proper registration with one another, and so on.

[0006] One such registration inspection system is disclosed in U.S. Pat. No. 5,359,525, the disclosure of which is incorporated herein by reference. As described therein, registration inspection of a composite product during fabrication is accomplished by producing an image of the article and then analyzing the image to detect the relative positions of one or more components. The detected positions are then compared to desired positions to thereby determine whether one or more components are improperly positioned. Such registration inspection systems employ conventional video cameras for capturing visible, ultraviolet, x-ray, and infrared light reflected by and/or transmitted through components of the product in order to produce still video images of such components. Thus, after producing a video image of a composite article and its several components, the image can be analyzed to determine whether the components are properly positioned and registered with one another.

[0007] Although highly useful for many applications, there is a need for a higher order level of inspection and control that provides advantages with respect to the inspection, analysis and control of high speed web converting processes associated with manufacturing products having tight quality tolerances. Such products include, for example, certain products having engagement seams formed by connecting two elements together such that the engagement seam is essentially two layers. For example, engagement seams formed by connected side panels of the training pants described previously has heretofore entailed connecting the side panels in face-to-face relationships with outer edges of the side panels aligned with each other. To inspect such an engagement seam, it was necessary only to inspect the exposed outer edges of the side panels so that there was no need to actually capture an image of any underlying elements or edges of the training pants. More recent engagement seams, however, are formed by connecting the side panels in overlapping relationship so that the outer edge of one side panel underlies the other side panel at the engagement seam. Still referring to the engagement seam example, arriving at a finished state of properly engaged side seams requires a precise final positioning of the edges of the fastening system components on the side panels. Such a level of control can be accomplished through a cascaded process control of multiple (e.g., up to seven in one example) dependent product geometrical relationships that can be affected by material, process settings, process set points, transient conditions, and so on.

[0008] It is desirable to capture an image of the underlying panel at the engagement seam to determine the position and relative alignment of the outer edge of the underlying panel. Because the light emitting source and camera of the inspection system described in U.S. Pat. No. 5,359,525 are positioned exterior of the inspected component, it is difficult to inspect the outer edge of an underlying panel of the more recent engagement seams once the panels are connected. For example, it is difficult to lay the engagement seam flat over the light emitting source of the disclosed inspection system, thereby increasing the risk that the image captured by the camera will appear fuzzy. Moreover, it is difficult for the visible or ultraviolet light to pass through or reflect from the underlying layer of the multiple layers present at such an engagement seam.

[0009] Moreover, prior art systems for inspecting composite articles, such as, for example, disposable absorbent garments, do not integrate and relate data from multiple inspection stations to prioritize necessary or desirable automatic control actions, trouble-shooting actions/recommendations, operator alarming, and so on.

[0010] Further, prior art systems for inspecting composite articles, such as disposable absorbent garments, did not integrate and relate information/data from multiple inspections systems with information from other information systems associated with a manufacturing process. For example, database systems have been employed for collecting waste/delay/productivity information, raw material information, manually entered quality information (e.g., from manual inspections of selected items), and machine process information. In fabricating articles such as diapers and training pants, such information includes productivity associated with a particular production run, various attributes of the raw materials used, process control settings (e.g., vacuum settings, machine set points, conveyor steering commands, and so on), and the like. Such prior art information, however, has not been correlated to inspection information so that improvements can be made, for example, to further reduce cost and waste, and to increase productivity and quality.

[0011] Improvements are also desired with respect to information systems associated with web converting processes. For example, web converting manufacturing processes often use multiple station devices, with each station performing a substantially similar function. Prior art information systems do not adequately isolate and exploit inspection data associated with a particular station of such multiple station devices. It has been known to use simple photoeye detectors to detect whether a side panel placed by a multiple station device was present on the absorbent article constructed using that device. Identifying and exploiting additional aspects of multiple station devices, however, is desirable.

SUMMARY OF THE INVENTION

[0012] In one form, the invention is a quality information system suitable for use in connection with a high speed web converting manufacturing process for manufacturing composite product from a sequential addition of component parts during a production run of product, the component parts including a component added as a continuous web of material and a component added as a discontinuous web of material. An inspection system automatically inspects a quality aspect of a sample set of composite products produced during the production run and provides quality parameters associated with the inspected aspect, the provided quality parameters being correlated to the inspected composite products produced during the production run. A quality data subsystem obtains and stores a plurality of the provided quality parameters.

[0013] In another form, the invention is a method of providing quality information suitable for use in connection with a high speed web converting manufacturing process for manufacturing a composite product during a production run from a sequential addition of component parts, the component parts including a part added as a continuous web of material and a part added as a discontinuous web of material. The method comprises:

[0014] automatically inspecting a quality aspect of a sample set of composite products manufactured during the production run;

[0015] providing a quality parameter associated with the automatically inspected quality aspect of the inspected composite products;

[0016] correlating the quality parameter to the inspected composite products; and

[0017] selectively storing the correlated quality parameter in a quality data subsystem.

[0018] In another form, the invention is a quality information system, suitable for use in connection with a manufacturing production line producing a composite product from a sequential addition of component parts during a production run, the component parts including a component added as a continuous web of material and a component added as a discontinuous web of material. An inspection system automatically inspects a quality aspect of a composite product produced during the production run, the inspection system providing an inspection parameter associated with the inspected aspect. The inspection parameter is correlated to an inspected composite product. An information exchange system obtains via the communication network the inspection parameter, the information exchange determining a quality parameter associated with the inspection parameter. A quality system obtains the quality parameter via the communication network, the quality system storing the quality parameter.

[0019] In another form, the invention is a method of adjusting a manufacturing process set point associated with a high speed web converting manufacturing process manufacturing a composite product from a sequential addition of component parts. The method comprises:

[0020] providing a raw material database having quality data stored therein correlated to a raw material used to supply at least one component part of the composite product;

[0021] accessing the raw material database and extracting the quality data therefrom;

[0022] obtaining the extracted quality data;

[0023] determining an adjustment to the manufacturing set point as a function of the extracted quality data; and

[0024] adjusting the manufacturing process set point as a function of the determined adjustment to the manufacturing set point.

[0025] Definitions

[0026] Within the context of this specification, each term or phrase below will include, but will not be considered necessarily limited to, the following meaning or meanings.

[0027] “Bonded” comprises the joining, adhering, connecting, attaching, or the like, of two elements. Two elements will be considered to be bonded together when they are bonded directly to one another or indirectly to one another, such as when each is directly bonded to intermediate elements.

[0028] “Connected” comprises the joining, adhering, bonding, attaching, or the like, of two elements. Two elements will be considered to be connected together when they are connected directly to one another or indirectly to one another, such as when each is directly connected to intermediate elements.

[0029] “Culled” articles includes articles that are discarded during the manufacturing process, prior to being packaged. For example, an article may be culled if an inspector identifies an unacceptable nonconforming characteristic. An article may be culled before its construction has been completed.

[0030] “Disposable” comprises articles which are designed to be discarded after a limited use rather than being laundered or otherwise restored for reuse.

[0031] “Disposed,” “disposed on,” and variations thereof are intended to include that one element can be integral with another element, or that one element can be a separate structure bonded to or placed with or placed near another element.

[0032] “Elastic,” “elasticized” and “elasticity” include that property of a material or composite by virtue of which it tends to recover its original size and shape after removal of a force causing a deformation.

[0033] “Elastomeric” comprises a material or composite which can be elongated by at least 25 percent of its relaxed length and which will recover, upon release of the applied force, at least 10 percent of its elongation. It is generally preferred that the elastomeric material or composite be capable of being elongated by at least 100 percent, more preferably by at least 300 percent, of its relaxed length and recover, upon release of an applied force, at least 50 percent of its elongation.

[0034] “Endseal” is an edge of two or more panels that are joined together by adhesive or other means. In the context of an absorbent article, a front end seal includes a front distal edge of an absorbent panel and a distal edge of a right front elastic side panel and/or a front distal edge of an absorbent panel and a distal edge of a left front elastic side panel. In the context of an absorbent article, a rear end seal includes a rear distal edge of an absorbent panel and a distal edge of a right rear elastic side panel and/or a rear distal edge of an absorbent panel and a distal edge of a left rear elastic side panel.

[0035] “Fabrics” is used to include all of the woven, knitted and nonwoven fibrous webs.

[0036] “Flexible” comprises materials which are compliant and which will readily conform to the general shape and contours of the wearer's body.

[0037] “Force” includes a physical influence exerted by one body on another which produces acceleration of bodies that are free to move and deformation of bodies that are not free to move. Force is expressed in grams per unit area.

[0038] “Graphic” comprises any design, pattern, or the like that is visible on an absorbent article.

[0039] “Hydrophilic” comprises fibers or the surfaces of fibers which are wetted by the aqueous liquids in contact with the fibers. The degree of wetting of the materials can, in turn, be described in terms of the contact angles and the surface tensions of the liquids and materials involved. Equipment and techniques suitable for measuring the wettability of particular fiber materials or blends of fiber materials can be provided by a Cahn SFA-222 Surface Force Analyzer System, or a substantially equivalent system. When measured with this system, fibers having contact angles less than 900 are designated “wettable” or hydrophilic, while fibers having contact angles greater than 900 are designated “nonwettable” or hydrophobic.

[0040] “Integral” comprises various portions of a single unitary element rather than separate structures bonded to or placed with or placed near one another.

[0041] “Inward” and “outward” comprise positions relative to the center of an absorbent article, and particularly transversely and/or longitudinally closer to or away from the longitudinal and transverse center of the absorbent article.

[0042] “Layer” when used in the singular can have the dual meaning of a single element or a plurality of elements.

[0043] “Liquid impermeable”, when used in describing a layer or multi-layer laminate, includes that a liquid, such as urine, will not pass through the layer or laminate, under ordinary use conditions, in a direction generally perpendicular to the plane of the layer or laminate at the point of liquid contact. Liquid, or urine, may spread or be transported parallel to the plane of the liquid impermeable layer or laminate, but this is not considered to be within the meaning of “liquid impermeable” when used herein.

[0044] “Longitudinal” and “transverse” comprise their customary meaning. The longitudinal axis lies in the plane of the garment and is generally parallel to a vertical plane that bisects a standing wearer into left and right body halves when the article is worn. The transverse axis lies in the plane of the article generally perpendicular to the longitudinal axis. The garment as illustrated is longer in the longitudinal direction than in the transverse direction.

[0045] “Mathematical characteristic” includes determinations made by mathematical manipulation, as well as statistical determinations, manipulations and assessments of variability of data sets such as, for example, a range or indication of a range of values within a data set, a variance, or a coefficient of variance.

[0046] “Member” when used in the singular can comprise the dual meaning of a single element or a plurality of elements.

[0047] “Nonwoven” and “nonwoven web” comprise materials and webs of material which are formed without the aid of a textile weaving or knitting process. “Operatively joined,” with reference to the attachment of an elastic member to another element, includes that the elastic member when attached to or connected to the element, or treated with heat or chemicals, by stretching, or the like, gives the element elastic properties; and with reference to the attachment of a non-elastic member to another element, means that the member and element can be attached in any suitable manner that permits or allows them to perform the intended or described function of the joinder. The joining, attaching, connecting or the like can be either directly, such as joining either member directly to an element, or can be indirectly by means of another member disposed between the first member and the first element.

[0048] “Outer cover graphic” comprises a graphic that is directly visible upon inspection of the exterior surface of a garment, and for a refastenable garment is in reference to inspection of the exterior surface of the garment when the fastening system is engaged as it would be during use.

[0049] “Permanently bonded” comprises the joining, adhering, connecting, attaching, or the like, of two elements of an absorbent garment such that the elements tend to be and remain bonded during normal use conditions of the absorbent garment.

[0050] “Refastenable” comprises the property of two elements being capable of releasable attachment, separation, and subsequent releasable reattachment without substantial permanent deformation or rupture.

[0051] “Releasably attached,” “releasably engaged” and variations thereof comprise two elements being connected or connectable such that the elements tend to remain connected absent a separation force applied to one or both of the elements, and the elements being capable of separation without substantial permanent deformation or rupture. The required separation force is typically beyond that encountered while wearing the absorbent garment.

[0052] “Rupture” includes the breaking or tearing apart of a material; in tensile testing, the term comprises the total separation of a material into two parts either all at once or in stages, or the development of a hole in some materials.

[0053] “Stretch bonded” comprises an elastic member being bonded to another member while the elastic member is extended at least about 25 percent of its relaxed length. Desirably, the term “stretch bonded” comprises the situation wherein the elastic member is extended at least about 100 percent, and more desirably at least about 300 percent, of its relaxed length when it is bonded to the other member.

[0054] “Stretch bonded laminate” comprises a composite material having at least two layers in which one layer is a gatherable layer and the other layer is an elastic layer. The layers are joined together when the elastic layer is in an extended condition so that upon relaxing the layers, the gatherable layer is gathered.

[0055] “Surface” includes any layer, film, woven, nonwoven, laminate, composite, or the like, whether pervious or impervious to air, gas, and/or liquids.

[0056] “Tension” includes a uniaxial force tending to cause the extension of a body or the balancing force within that body resisting the extension.

[0057] “Thermoplastic” describes a material that softens when exposed to heat and which substantially returns to a nonsoftened condition when cooled to room temperature.

[0058] These terms may be defined with additional language or by additional examples in the remaining portions of the specification, and also encompass their ordinary and customary meaning(s).

BRIEF DESCRIPTION OF THE DRAWINGS

[0059] FIG. 1 is a side elevation of a child's training pants with a fastening system of the training pants shown connected on one side of the training pants and disconnected on the other side of the training pants;

[0060] FIG. 2 is a bottom plan view of the training pants of FIG. 1 in an unfastened, stretched and laid flat condition to show an outer surface of the training pants which faces away from the wearer;

[0061] FIG. 3 is a top plan view of the training pants in its unfastened, stretched and laid flat condition to show an inner surface of the training pants which faces the wearer when the training pants are worn, with portions of the training pants being cut away to reveal underlying features;

[0062] FIG. 4A is a block diagram of an inspection system having an information exchange;

[0063] FIG. 4B illustrates schematically one embodiment of a flow of information to and from an information exchange;

[0064] FIGS. 5A and 5B are logic flow diagrams illustrating one method of providing real time quality, suitable for use in connection with an inspection system such as that illustrated in FIG. 4A ;

[0065] FIG. 6 is a logic flow diagram of one method of using quality information from a raw material database to adjust process settings, suitable for use in connection with an information system such as that illustrated in FIG. 4A ;

[0066] FIG. 7 is a logic flow diagram illustrating one method of providing real time registration set point control, suitable for use in connection with an information system such as that illustrated in FIG. 4A ;

[0067] FIG. 8 is a logic flow diagram illustrating another method of providing real time registration set point control, suitable for use in connection with an information system such as that illustrated in FIG. 4A ;

[0068] FIG. 9 is a schematic illustration of one embodiment of a web guiding system, suitable for use in connection with an information system such as that illustrated in FIG. 4A ;

[0069] FIGS. 10 A- 10 D illustrate schematically a fastening system associated with the refastenable child's training pants illustrated in FIGS. 1 - 3 ;

[0070] FIG. 11 is a schematic illustration of another embodiment of a web guiding system, suitable for use in connection with an information system such as that illustrated in FIG. 4A ;

[0071] FIG. 12 is a schematic representation of an exemplary automated trouble-shooting system, suitable for use in connection with an information system such as that illustrated in FIG. 4A ;

[0072] FIGS. 13A and 13B are logic flow diagrams illustrating one method of providing process information, suitable for use in connection with an information system such as that illustrated in FIG. 4A ;

[0073] FIG. 14 is a logic flow diagram illustrating one method (indicated generally by reference 1600 ) of providing an automated trouble-shooting capability, suitable for use in connection with an information system such as that illustrated in FIG. 4 or 12 ;

[0074] FIGS. 15 - 19 illustrate certain exemplary display information for display on an operator interface associated with a manufacturing process;

[0075] FIG. 19A illustrates an exemplary display of full product inspection information of a fastening system associated with a refastenable child's training pants as displayed on an operator interface;

[0076] FIG. 20 illustrates in schematic form a system for tracking per station information from a multiple station manufacturing device;

[0077] FIG. 21 illustrates an exemplary display of certain per station information for use in connection with a system such as that illustrated in FIG. 20 ;

[0078] FIG. 22 is a block diagram illustrative of one configuration of a database system suitable for use in mining data in connection with an information system such as that illustrated in FIG. 4A ;

[0079] FIG. 23 is a logic flow diagram of a method for correlating product (or process) attribute information with other manufacturing related information for use in data mining applications in connection with an information system such as that illustrated in FIG. 4A .

DETAILED DESCRIPTION OF THE DRAWINGS

[0080] The methods and apparatus of the present invention can be used to make a variety of articles such as disposable absorbent garments including diapers, training pants, feminine hygiene products, incontinence products, other personal care or health care garments, swim pants, athletic clothing, pants and shorts, and the like. As an example, the methods and apparatus of the present invention can be used to make articles in which at least two elements of the article are connected together during the making thereof to assemble or “pre-fasten” the article. For ease of explanation, the methods and apparatus of the present invention are hereafter described in connection with making pre-fastened child's training pants, generally indicated as 20 in FIG. 1 . In particular, the methods and apparatus will be described in terms of those for making pre-fastened disposable training pants as described in U.S. patent application Ser. No. 09/444,083 titled “Absorbent Articles With Refastenable Side Seams” and filed Nov. 22, 1999 (corresponding to PCT application WO 00/37009 published Jun. 29, 2000) by A. L. Fletcher et al., the disclosure of which is incorporated herein by reference. Training pants 20 can also be constructed using the methods and apparatus disclosed in U.S. Pat. No. 4,940,464 issued Jul. 10, 1990 to Van Gompel et al.; and U.S. Pat. No. 5,766,389 issued Jun. 16, 1998 to Brandon et al.; the disclosures of which are also incorporated herein by reference.

[0081] With reference now to the drawings, and in particular to FIG. 1 , the training pants 20 are illustrated in a partially fastened condition and comprise an absorbent chassis 32 having a front waist region 22 , a back waist region 24 , a crotch region 26 interconnecting the front and back waist regions, an inner surface 28 which is configured to contact the wearer, and an outer surface 30 opposite the inner surface and configured to contact the wearer's clothing. With additional reference to FIGS. 2 and 3 , the absorbent chassis 32 also has a pair of laterally opposite side edges 36 and a pair of longitudinally opposite waist edges, respectively designated front waist edge 38 and back waist edge 39 . The front waist region 22 is contiguous with the front waist edge 38 , and the back waist region 24 is contiguous with the back waist edge 39 .

[0082] The illustrated absorbent chassis 32 comprises a composite structure 33 ( FIG. 3 ), which when laid flat can be rectangular or any other desired shape, and has a pair of laterally opposite front side panels 34 and a pair of laterally opposite back side panels 134 extending outward therefrom. The composite structure 33 and side panels 34 , 134 may comprise two or more separate elements, as shown in FIG. 1 , or be integrally formed. Integrally formed side panels 34 , 134 and composite structure 33 would comprise at least some common materials, such as the bodyside liner, flap composite, outer cover, other materials and/or combinations thereof, and could define a one-piece elastic, stretchable, or nonstretchable pants. The illustrated composite structure 33 comprises an outer cover 40 , a bodyside liner 42 ( FIGS. 1 and 3 ) connected to the outer cover in a superposed relation, an absorbent assembly 44 ( FIG. 3 ) disposed between the outer cover and the bodyside liner, and a pair of containment flaps 46 ( FIG. 3 ). The illustrated composite structure 33 has opposite ends 45 which form portions of the front and back waist edges 38 and 39 , and opposite side edges 47 which form portions of the side edges 36 of the absorbent chassis 32 ( FIGS. 2 and 3 ). For reference, arrows 48 and 49 depict the orientation of the longitudinal axis and the transverse or lateral axis, respectively, of the training pants 20 .

[0083] With the training pants 20 in the fastened position as partially illustrated in FIG. 1 , the front and back side panels 34 , 134 are connected together by a fastening system 80 to define a three-dimensional pants configuration having an interior space 51 , a waist opening 50 for receiving the wearer into the interior space of the pants, a pair of leg openings 52 and engagement seams 88 along which the side panels are connected. The interior space 51 of the pants 20 is thus bounded by the absorbent chassis 32 , the engagement seams 88 and the portions of the side panels 34 , 134 extending on opposite sides of the engagement seams 88 (e.g., between the engagement seams and the absorbent chassis. As used herein, the “interior space” 51 is intended to refer to the space between any two portions of a three-dimensional article which generally oppose each other. It is understood that a transverse cross-section of the article need not be closed, e.g., continuous, to define an interior space. For example, a two-dimensional article may be generally folded over on itself so that two portions of the article oppose each other to define an interior space of the article therebetween. Thus, the interior space 51 of the training pants 20 shown in FIG. 1 may be defined by the side panels 34 , 134 themselves or, if the side panels were fully straightened therebetween, the interior space would be defined by a combination of the side panels and the front and back waist regions 22 , 24 of the absorbent chassis 32 .

[0084] The front waist region 22 comprises the portion of the training pants 20 which, when worn, is positioned on the front of the wearer while the back waist region 24 comprises the portion of the training pants which, when worn, is positioned on the back of the wearer. The crotch region 26 of the training pants 20 comprises the portion of the training pants 20 which, when worn, is positioned between the legs of the wearer and covers the lower torso of the wearer. The front and back side panels 34 and 134 comprise the portions of the training pants 20 which, when worn, are positioned on the hips of the wearer. The waist edges 38 and 39 of the absorbent chassis 32 are configured to encircle the waist of the wearer when worn and together define the waist opening 50 ( FIG. 1 ). Portions of the side edges 36 in the crotch region 26 generally define the leg openings 52 .

[0085] The absorbent chassis 32 is configured to contain and/or absorb any exudates discharged from the wearer. For example, the absorbent chassis 32 desirably although not necessarily comprises the pair of containment flaps 46 which are configured to provide a barrier to the transverse flow of body exudates. A flap elastic member 53 ( FIG. 3 ) can be operatively joined with each containment flap 46 in any suitable manner as is well known in the art. The elasticized containment flaps 46 define an unattached edge which assumes an upright configuration in at least the crotch region 26 of the training pants 20 to form a seal against the wearer's body. The containment flaps 46 can be located along the side edges 36 of the absorbent chassis 32 , and can extend longitudinally along the entire length of the absorbent chassis or may only extend partially along the length of the absorbent chassis. Suitable constructions and arrangements for the containment flaps 46 are generally well known to those skilled in the art and are described in U.S. Pat. No. 4,704,116 issued Nov. 3, 1987 to Enloe, which is incorporated herein by reference.

[0086] To further enhance containment and/or absorption of body exudates, the training pants 20 desirably although not necessarily include a front waist elastic member 54 , a rear waist elastic member 56 , and leg elastic members 58 , as are known to those skilled in the art ( FIG. 3 ). The waist elastic members 54 and 56 can be operatively joined to the outer cover 40 and/or the bodyside liner 42 along the opposite waist edges 38 and 39 , and can extend over part or all of the waist edges. The leg elastic members 58 can be operatively joined to the outer cover 40 and/or the bodyside liner 42 along the opposite side edges 36 and positioned in the crotch region 26 of the training pants 20 . The leg elastic members 58 can be longitudinally aligned along each side edge 47 of the composite structure 33 . Each leg elastic member 58 has a front terminal point 63 and a back terminal point 65 , which represent the longitudinal ends of the elastic gathering caused by the leg elastic members. The front terminal points 63 can be located adjacent the longitudinally innermost parts of the front side panels 34 , and the back terminal points 65 can be located adjacent the longitudinally innermost parts of the back side panels 134 .

[0087] The flap elastic members 53 , the waist elastic members 54 and 56 , and the leg elastic members 58 can be formed of any suitable elastic material. As is well known to those skilled in the art, suitable elastic materials include sheets, strands or ribbons of natural rubber, synthetic rubber, or thermoplastic elastomeric polymers. The elastic materials can be stretched and adhered to a substrate, adhered to a gathered substrate, or adhered to a substrate and then elasticized or shrunk, for example with the application of heat, such that elastic constrictive forces are imparted to the substrate. In one particular embodiment, for example, the leg elastic members 58 comprise a plurality of dry-spun coalesced multifilament spandex elastomeric threads sold under the trade name LYCRA and available from E. I. Du Pont de Nemours and Company, Wilmington, Del., U.S.A.

[0088] The outer cover 40 desirably comprises a material which is substantially liquid impermeable, and can be elastic, stretchable or nonstretchable. The outer cover 40 can be a single layer of liquid impermeable material, but desirably comprises a multi-layered laminate structure in which at least one of the layers is liquid impermeable. For instance, the outer cover 40 can include a liquid permeable outer layer and a liquid impermeable inner layer that are suitably joined together by a laminate adhesive, ultrasonic bonds, thermal bonds, or the like. Suitable laminate adhesives, which can be applied continuously or intermittently as beads, a spray, parallel swirls, or the like, can be obtained from Findley Adhesives, Inc., of Wauwatosa, Wis., U.S.A., or from National Starch and Chemical Company, Bridgewater, N.J. U.S.A. The liquid permeable outer layer can be any suitable material and desirably one that provides a generally cloth-like texture. One example of such a material is a 20 gsm (grams per square meter) spunbond polypropylene nonwoven web. The outer layer may also be made of those materials of which the liquid permeable bodyside liner 42 is made. While it is not a necessity for the outer layer to be liquid permeable, it is desired that it provides a relatively cloth-like texture to the wearer.

[0089] The inner layer of the outer cover 40 can be both liquid and vapor impermeable, or can be liquid impermeable and vapor permeable. The inner layer can be manufactured from a thin plastic film, although other flexible liquid impermeable materials may also be used. The inner layer, or the liquid impermeable outer cover 40 when a single layer, prevents waste material from wetting articles, such as bedsheets and clothing, as well as the wearer and caregiver. A suitable liquid impermeable film for use as a liquid impermeable inner layer, or a single layer liquid impermeable outer cover 40 , is a 0.02 millimeter polyethylene film commercially available from Pliant Corporation of Schaumburg, Ill., U.S.A.

[0090] If the outer cover 40 is a single layer of material, it can be embossed and/or matte finished to provide a more cloth-like appearance. As earlier mentioned, the liquid impermeable material can permit vapors to escape from the interior space 51 of the disposable absorbent article, while still preventing liquids from passing through the outer cover 40 . A suitable “breathable” material is composed of a microporous polymer film or a nonwoven fabric that has been coated or otherwise treated to impart a desired level of liquid impermeability. A suitable microporous film is a PMP-1 film material commercially available from Mitsui Toatsu Chemicals, Inc., Tokyo, Japan, or an XKO-8044 polyolefin film commercially available from 3M Company, Minneapolis, Minn. U.S.A.

[0091] As shown in FIGS. 1 and 2 , the training pants 20 and in particular the outer cover 40 desirably comprises one or more appearance-related components. Examples of appearance-related components include, but are not limited to, graphics; highlighting or emphasizing leg and waist openings in order to make product shaping more evident or visible to the user; highlighting or emphasizing areas of the product to simulate functional components such as elastic leg bands, elastic waistbands, simulated “fly openings” for boys, ruffles for girls; highlighting areas of the product to change the appearance of the size of the product; registering wetness indicators, temperature indicators, and the like in the product; registering a back label, or a front label, in the product; and registering written instructions at a desired location in the product.

[0092] The illustrated pair of training pants 20 is designed for use by young girls and includes a registered outer cover graphic 60 ( FIG. 2 ). In this design, the registered graphic 60 includes a primary pictorial image 61 , simulated waist ruffles 62 , and simulated leg ruffles 64 . The primary pictorial image 61 includes a rainbow, sun, clouds, animal characters, wagon and balloons. Any suitable design can be utilized for a training pants intended for use by young girls, so as to be aesthetically and/or functionally pleasing to them and the caregiver. The appearance-related components are desirably positioned on the training pants 20 at selected locations, which can be carried out using the methods disclosed in U.S. Pat. No. 5,766,389 issued Jun. 16, 1998 to Brandon et al., the entire disclosure of which is incorporated herein by reference. The primary pictorial image 61 is desirably positioned in the front waist region 22 along the longitudinal center line of the training pants 20 .

[0093] The liquid permeable bodyside liner 42 is illustrated as overlying the outer cover 40 and absorbent assembly 44 , and may but need not have the same dimensions as the outer cover 40 . The bodyside liner 42 is desirably compliant, soft feeling, and non-irritating to the child's skin. Further, the bodyside liner 42 can be less hydrophilic than the absorbent assembly 44 , to present a relatively dry surface to the wearer and permit liquid to readily penetrate through its thickness. Alternatively, the bodyside liner 42 can be more hydrophilic or can have essentially the same affinity for moisture as the absorbent assembly 44 to present a relatively wet surface to the wearer to increase the sensation of being wet. This wet sensation can be useful as a training aid. The hydrophilic/hydrophobic properties can be varied across the length, width and depth of the bodyside liner 42 and absorbent assembly 44 to achieve the desired wetness sensation or leakage performance.

[0094] The bodyside liner 42 can be manufactured from a wide selection of web materials, such as synthetic fibers (for example, polyester or polypropylene fibers), natural fibers (for example, wood or cotton fibers), a combination of natural and synthetic fibers, porous foams, reticulated foams, apertured plastic films, or the like. Various woven and nonwoven fabrics can be used for the bodyside liner 42 . For example, the bodyside liner can be composed of a meltblown or spunbonded web of polyolefin fibers. The bodyside liner can also be a bonded-carded web composed of natural and/or synthetic fibers. The bodyside liner can be composed of a substantially hydrophobic material, and the hydrophobic material can, optionally, be treated with a surfactant or otherwise processed to impart a desired level of wettability and hydrophilicity. For example, the material can be surface treated with about 0.45 weight percent of a surfactant mixture comprising Ahcovel N-62 from Hodgson Textile Chemicals of Mount Holly, N.C., U.S.A. and Glucopan 220UP from Henkel Corporation of Ambler, Pa. in an active ratio of 3:1. The surfactant can be applied by any conventional means, such as spraying, printing, brush coating or the like. The surfactant can be applied to the entire bodyside liner 42 or can be selectively applied to particular sections of the bodyside liner, such as the medial section along the longitudinal center line.

[0095] A suitable liquid permeable bodyside liner 42 is a nonwoven bicomponent web having a basis weight of about 27 gsm. The nonwoven bicomponent can be a spunbond bicomponent web, or a bonded carded bicomponent web. Suitable bicomponent staple fibers include a polyethylene/polypropylene bicomponent fiber available from CHISSO Corporation, Osaka, Japan. In this particular bicomponent fiber, the polypropylene forms the core and the polyethylene forms the sheath of the fiber. Other fiber orientations are possible, such as multi-lobe, side-by-side, end-to-end, or the like. The outer cover 40 , bodyside liner 42 and other materials used to construct the pants can comprise elastomeric or nonelastomeric materials.

[0096] The absorbent assembly 44 ( FIG. 3 ) is positioned between the outer cover 40 and the bodyside liner 42 , which can be joined together by any suitable means such as adhesives, ultrasonic bonds, thermal bonds, or the like. The absorbent assembly 44 can be any structure which is generally compressible, conformable, non-irritating to the child's skin, and capable of absorbing and retaining liquids and certain body wastes, and may be manufactured in a wide variety of sizes and shapes, and from a wide variety of liquid absorbent materials commonly used in the art. For example, the absorbent assembly 44 can suitably comprise a matrix of hydrophilic fibers, such as a web of cellulosic fluff, mixed with particles of a high-absorbency material commonly known as superabsorbent material. In a particular embodiment, the absorbent assembly 44 comprises a matrix of cellulosic fluff, such as wood pulp fluff, and superabsorbent hydrogel-forming particles. The wood pulp fluff can be exchanged with synthetic, polymeric, meltblown fibers or short cut homofil bicomponent synthetic fibers and natural fibers. The superabsorbent particles can be substantially homogeneously mixed with the hydrophilic fibers or can be nonuniformly mixed. The fluff and superabsorbent particles can also be selectively placed into desired zones of the absorbent assembly 44 to better contain and absorb body exudates. The concentration of the superabsorbent particles can also vary through the thickness of the absorbent assembly 44 . Alternatively, the absorbent assembly 44 can comprise a laminate of fibrous webs and superabsorbent material or other suitable means of maintaining a superabsorbent material in a localized area.

[0097] Suitable superabsorbent materials can be selected from natural, synthetic, and modified natural polymers and materials. The superabsorbent materials can be inorganic materials, such as silica gels, or organic compounds, such as crosslinked polymers, for example, sodium neutralized polyacrylic acid. Suitable superabsorbent materials are available from various commercial vendors, such as Dow Chemical Company located in Midland, Mich., U.S.A., and Stockhausen GmbH & Co. KG, D-47805 Krefeld, Federal Republic of Germany. Typically, a superabsorbent material is capable of absorbing at least about 15 times its weight in water, and desirably is capable of absorbing more than about 25 times its weight in water.

[0098] In one embodiment, the absorbent assembly 44 comprises a blend of wood pulp fluff and superabsorbent material. One preferred type of pulp is identified with the trade designation CR1654, available from U.S. Alliance, Childersburg, Ala., U.S.A., and is a bleached, highly absorbent sulfate wood pulp containing primarily soft wood fibers and about 16 percent hardwood fibers. As a general rule, the superabsorbent material is present in the absorbent assembly 44 in an amount of from 0 to about 90 weight percent based on total weight of the absorbent assembly. The absorbent assembly 44 suitably has a density within the range of about 0.10 to about 0.35 grams per cubic centimeter. The absorbent assembly 44 may or may not be wrapped or encompassed by a suitable tissue wrap that may help maintain the integrity and/or shape of the absorbent assembly.

[0099] The absorbent chassis 32 can also incorporate other materials designed primarily to receive, temporarily store, and/or transport liquid along the mutually facing surface with absorbent assembly 44 , thereby maximizing the absorbent capacity of the absorbent assembly. One suitable material is referred to as a surge layer (not shown) and comprises a material having a basis weight of about 50 to about 120 grams per square meter, and comprising a through-air-bonded-carded web of a homogenous blend of 60 percent 3 denier type T-256 bicomponent fiber comprising a polyester core/polyethylene sheath and 40 percent 6 denier type T-295 polyester fiber, both commercially available from Kosa Corporation of Salisbury, N.C., U.S.A.

[0100] As noted previously, the illustrated training pants 20 have front and back side panels 34 and 134 disposed on each side of the absorbent chassis 32 . The front side panels 34 can be permanently bonded along seams 66 to the composite structure 33 of the absorbent chassis 32 in the respective front and back waist regions 22 and 24 . More particularly, as seen best in FIGS. 2 and 3 , the front side panels 34 can be permanently bonded to and extend transversely outward beyond the side edges 47 of the composite structure 33 in the front waist region 22 , and the back side panels 134 can be permanently bonded to and extend transversely outward beyond the side edges of the composite structure in the back waist region 24 . The side panels 34 and 134 may be bonded to the composite structure 33 using attachment means known to those skilled in the art such as adhesive, thermal or ultrasonic bonding. Alternatively, the side panels 34 and 134 can be formed as an integral portion of a component of the composite structure 33 . For example, the side panels can comprise a generally wider portion of the outer cover 40 , the bodyside liner 42 , and/or another component of the absorbent chassis 32 . The front and back side panels 34 and 134 can be permanently bonded together or be releasably connected with one another such as by the fastening system 80 of the illustrated embodiment.

[0101] The front and back side panels 34 , 134 each have an outer edge 68 spaced laterally from the seam 66 , a leg end edge 70 disposed toward the longitudinal center of the training pants 20 , and a waist end edge 72 disposed toward a longitudinal end of the training pants. The leg end edge 70 and waist end edge 72 extend from the side edges 47 of the composite structure 33 to the outer edges 68 . The leg end edges 70 of the side panels 34 and 134 form part of the side edges 36 of the absorbent chassis 32 . In the back waist region 24 , the leg end edges 70 are desirably although not necessarily curved and/or angled relative to the transverse axis 49 to provide greater coverage toward the back of the pants 20 as compared to the front of the pants. The waist end edges 72 are desirably parallel to the transverse axis 49 . The waist end edges 72 of the front side panels 34 form part of the front waist edge 38 of the absorbent chassis 32 , and the waist end edges 72 of the back side panels 134 form part of the back waist edge 39 of the absorbent chassis.

[0102] In particular embodiments for improved fit and appearance, the side panels 34 , 134 desirably have an average length measured parallel to the longitudinal axis 48 which is about 15 percent or greater, and particularly about 25 percent or greater, of the overall length of the pants, also measured parallel to the longitudinal axis 48 . For example, in training pants 20 having an overall length of about 54 centimeters, the side panels 34 , 134 desirably have an average length of about 10 centimeters or greater, such as about 15 centimeters. While each of the side panels 34 , 134 extends from the waist opening 50 to one of the leg openings 52 , the illustrated back side panels 134 have a continually decreasing length dimension moving from the attachment line 66 to the outer edge 68 , as is best shown in FIGS. 2 and 3 .

[0103] Each of the side panels 34 , 134 can include one or more individual, distinct pieces of material. In particular embodiments, for example, each side panel 34 , 134 can include first and second side panel portions that are joined at a seam, or can include a single piece of material which is folded over upon itself (not shown).

[0104] The side panels 34 , 134 desirably although not necessarily comprise an elastic material capable of stretching in a direction generally parallel to the transverse axis 49 of the training pants 20 . Suitable elastic materials, as well as one process of incorporating elastic side panels into training pants, are described in the following U.S. Pat. No. 4,940,464 issued Jul. 10, 1990 to Van Gompel et al.; U.S. Pat. No. 5,224,405 issued Jul. 6, 1993 to Pohjola; U.S. Pat. No. 5,104,116 issued Apr. 14, 1992 to Pohjola; and U.S. Pat. No. 5,046,272 issued Sep. 10, 1991 to Vogt et al.; all of which are incorporated herein by reference. In particular embodiments, the elastic material comprises a stretch-thermal laminate (STL), a neck-bonded laminate (NBL), a reversibly necked laminate, or a stretch-bonded laminate (SBL) material. Methods of making such materials are well known to those skilled in the art and described in U.S. Pat. No. 4,663,220 issued May 5, 1987 to Wisneski et al.; U.S. Pat. No. 5,226,992 issued Jul. 13, 1993 to Morman; and European Patent Application No. EP 0 217 032 published on Apr. 8, 1987 in the names of Taylor et al.; all of which are incorporated herein by reference. Alternatively, the side panel material may comprise other woven or nonwoven materials, such as those described above as being suitable for the outer cover 40 or bodyside liner 42 ; mechanically pre-strained composites; or stretchable but inelastic materials.

[0105] The illustrated training pants 20 includes the fastening system 80 for refastenably securing the training pants about the waist of the wearer. The illustrated fastening system 80 includes first fastening components 82 adapted for refastenable engagement to corresponding second fastening components 84 . In one embodiment, one surface of each of the first fastening components 82 comprises a plurality of engaging elements which project from that surface. The engaging elements of the first fastening components 82 are adapted to repeatedly engage and disengage engaging elements of the second fastening components 84 .

[0106] The fastening components can comprise separate elements bonded to the side panels, or they may be integrally formed with the side panels. Thus, unless otherwise specified, the term “fastening component” includes separate components which function as fasteners, and regions of materials such as the side panels which function as fasteners. Moreover, a single material can define multiple fastening components to the extent that different regions of the material function as separate fasteners. The fastening components 82 , 84 can be located on the side panels, between the side panels such as on the absorbent chassis, or a combination of the two.

[0107] The fastening components 82 , 84 can comprise any refastenable fasteners suitable for absorbent articles, such as adhesive fasteners, cohesive fasteners, mechanical fasteners, or the like. In particular embodiments the fastening components comprise mechanical fastening elements for improved performance. Suitable mechanical fastening elements can be provided by interlocking geometric shaped materials, such as hooks, loops, bulbs, mushrooms, arrowheads, balls on stems, male and female mating components, buckles, snaps, or the like.

[0108] The refastenable fastening system 80 allows for easy inspection of the interior space 51 of the pants 20 . If necessary, the fastening system 80 also allows the pants 20 to be removed quickly and easily. This is particularly beneficial when the pants contain messy excrement. For training pants 20 , the caregiver can completely remove the pant-like product and replace it with a new one without having to remove the child's shoes and clothing.

[0109] In the illustrated embodiment, the first fastening components 82 comprise hook fasteners and the second fastening components 84 comprise complementary loop fasteners. In another particular embodiment, the first fastening components 82 comprise loop fasteners and the second fastening components 84 comprise complementary hook fasteners. Alternatively, the fastening components 82 , 84 can comprise interlocking similar surface fasteners, adhesive or cohesive fastening elements such as an adhesive fastener and an adhesive-receptive landing zone or material; or the like. Although the training pants 20 illustrated in FIG. 1 show the back side panels 134 overlapping the front side panels 34 upon connection thereto, which is convenient, the training pants 20 can also be configured so that the front side panels overlap the back side panels when connected. One skilled in the art will recognize that the shape, density and polymer composition of the hooks and loops may be selected to obtain the desired level of engagement between the fastening components 82 , 84 . A more aggressive hook material may comprise a material with a greater average hook height, a greater percentage of directionally-aligned hooks, or a more aggressive hook shape.

[0110] Loop fasteners typically comprise a fabric or material having a plurality of loop members extending upwardly from at least one surface of the structure. The loop material can be formed of any suitable material, such as acrylic, nylon, polypropylene or polyester, and can be formed by methods such as warp knitting, stitch bonding or needle punching. Loop materials can also comprise any fibrous structure capable of entangling or catching hook materials, such as carded, spunbonded or other nonwoven webs or composites, including elastomeric and nonelastomeric composites. Suitable loop materials are available from Guilford Mills, Inc., Greensboro, N.C., U.S.A. under the trade designation No. 36549. Another suitable loop material can comprise a pattern un-bonded web as disclosed in U.S. Pat. No. 5,858,515 issued Jan. 12, 1999 to Stokes et al.

[0111] Hook fasteners typically comprise a fabric or material having a base or backing structure and a plurality of hook members extending upwardly from at least one surface of the backing structure. In contrast to the loop fasteners which desirably comprise a flexible fabric, the hook material advantageously comprises a resilient material to minimize unintentional disengagement of the fastener components as a result of the hook material becoming deformed and catching on clothing or other items. The term “resilient” as used herein comprises an interlocking material having a predetermined shape and the property of the interlocking material to resume the predetermined shape after being engaged and disengaged from a mating, complementary interlocking material. Suitable hook material can be molded or extruded from nylon, polypropylene or another suitable material. Suitable single-sided hook materials for the fastening components 82 , 84 are available from commercial vendors such as Velcro Industries B. V., Amsterdam, Netherlands or affiliates thereof, and are identified as Velcro HTH-829 with a unidirectional hook pattern and having a thickness of about 0.9 millimeters (35 mils) and HTH-851 with a unidirectional hook pattern and having a thickness of about 0.5 millimeters (20 mils); and Minnesota Mining & Manufacturing Co., St. Paul, Minn. U.S.A., including specific materials identified as CS-600.

[0112] With particular reference to FIG. 3 , the fastening components 82 are disposed on the inner surface 28 of the back side panels 134 . The fastening components 82 are desirably positioned along the outer edges 68 of the back side panels 134 , and abutting or adjacent to the waist end edge 72 . In certain embodiments, for example, the fastening components 82 can be located within about 2 centimeters, and more particularly within about 1 centimeter, of the outer edges 68 , the waist end edges 72 , and the leg end edges 70 . With particular reference to FIG. 2 , the second fastening components 84 are disposed on the outer surface 30 of the front side panels 134 . The second fastening components 84 are sized to receive the first fastening components 82 and are desirably positioned along the outer edges 68 of the front side panels 34 , and abutting or adjacent to the waist end edge 72 . As an example, the second fastening components 84 can be located within about 2 centimeters, and more particularly within about 1 centimeter, of the outer edges 68 , the waist end edges 72 , and the leg end edges 70 . Where the first fastening components 82 comprise loop fasteners disposed on the inner surface 28 and the second fastening components 84 comprise hook fasteners disposed on the outer surface 30 , the first fastening components can be sized larger than the second fastening components to ensure coverage of the rigid, outwardly-directed hooks.

[0113] The fastening components 84 , 82 can be adhered to the respective side panels 34 , 134 by any means known to those skilled in the art such as adhesive bonds, ultrasonic bonds or thermal bonds. The fastening components 82 , 84 may comprise separate fastening elements or distinct regions of an integral material. For example, the training pants 20 can include an integral second fastening material disposed in the front waist region 22 for refastenably connecting to the first fastening components 82 at two or more different regions, which define the second fastening components 84 ( FIG. 1 ). In a particular embodiment, the fastening components 82 , 84 can comprise integral portions of the waist regions 24 , 22 . For instance, one of the elastomeric front or back side panels 34 , 134 can function as second fastening components 84 in that they can comprise a material which is releasably engageable with fastening components 82 disposed in the opposite waist region.

[0114] The fastening components 82 , 84 of the illustrated embodiments are rectangular, although they may alternatively be square, round, oval, curved or othe