Title:
Process for the manufacture of textile products presenting varied sections
United States Patent 3920866
Abstract:
Process for the manufacture of textile products presenting varied sections, which process is operated on an initial product of nearly constant section and running at high speed, whereby the product is subjected to a local pretreatment which acts as inhibitor towards the addition or removal of material.
Application Number:
05/421622
Publication Date:
11/18/1975
Filing Date:
12/04/1973
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Export Citation:
Assignee:
Omnium de Prospective Industrielle, Societe Anonyme (Neuville-Saint-Amand, FR)
Primary Class:
Other Classes:
8/114.600, 8/115, 427/288, 427/331, 28/223
International Classes:
D01G15/70; D01H5/36; D02G3/34; D01G15/00; D01H5/00; B44C1/22
Field of Search:
117/5.5,37R,44,46R,46FC,115 8/114,114.6,115,115.5,140 28/57,59,63,72.1,74R,75R,75WT,76R
Primary Examiner:
Herbert Jr., Thomas J.
Assistant Examiner:
Hess, Bruce H.
Attorney, Agent or Firm:
Curtis, Morris & Safford
Claims:
I claim
1. A process for texturing a textile thread of substantially constant cross section to give a product having sections of varying widths by selective removal of excess material therefrom, which process comprises subjecting discreet segments of the continuously running textile thread to a localized impregnation with water, acting as an inhibitor towards the removal of material, and thereafter removing a superficial layer of the material from the unimpregnated segments of the textile thread by the continuous treatment of passing said textile thread through a flame, which attacks only the unimpregnated segments of said textile thread.
2. A process for texturing a textile thread of substantially constant cross section to give a product having sections of varying widths by selective removal of excess material therefrom, which process comprises subjecting discreet segments of the continuously running textile thread to a localized impregnation with dye, acting as an inhibitor towards the removal of material, and thereafter removing a superficial layer of the material from the unimpregnated segments of the textile thread by the continuous treatment of passing said textile thread through a flame, which attacks only the unimpregnated segments of said textile thread.
1. A process for texturing a textile thread of substantially constant cross section to give a product having sections of varying widths by selective removal of excess material therefrom, which process comprises subjecting discreet segments of the continuously running textile thread to a localized impregnation with water, acting as an inhibitor towards the removal of material, and thereafter removing a superficial layer of the material from the unimpregnated segments of the textile thread by the continuous treatment of passing said textile thread through a flame, which attacks only the unimpregnated segments of said textile thread.
2. A process for texturing a textile thread of substantially constant cross section to give a product having sections of varying widths by selective removal of excess material therefrom, which process comprises subjecting discreet segments of the continuously running textile thread to a localized impregnation with dye, acting as an inhibitor towards the removal of material, and thereafter removing a superficial layer of the material from the unimpregnated segments of the textile thread by the continuous treatment of passing said textile thread through a flame, which attacks only the unimpregnated segments of said textile thread.
Description:
The present invention relates to a new process for the manufacture of a textile product of irregular physical structure, and in particular of a textile thread presenting varied sections, i.e. sections of different widths.
By textile thread is intended any supple product whose section is of small dimensions in relation to its length (thread, spun yarns, etc.), and which is composed in part or altogether of a textile material or the like, pure or in mixture.
New effects on finished textile products are constantly being sought, for instance by causing variations in density or volume. Some processes try to obtain these effects at the moment of knitting or weaving. Other processes try to modify the thread before subjecting the latter to the knitting or weaving. Amongst the latter may be quoted the methods of texturing which confer a new configuration on the thread, or the methods by which a number of regular threads are assembled in such a manner as to produce an irregular and original aspect.
It has also been tried to obtain threads of varied sections, that is to say threads presenting thin segments and thick segments. The best known process for synthetic yarn is space-drawing.
However, most of the conventional manufacture processes produce threads of a constant section on their whole length. The local application of additional material or the local removal of excess material has then been tried. Subject of French Patent no. 982,337 (or its equivalent British Patent No. 645,159) is a process for the local removal of material on a thread running continuously.
The application of these localized processes proves difficult while calling for complex installations, especially when irregular effects are to be obtained.
The present invention has as its object to obtain a thread presenting varied sections on its length by local addition or local removal of material, whereby the process of adding or removing material can be operated continuously.
To this end, the thread running continuously is subjected to a localized and discontinuous pretreatment, which pretreatment acts as inhibitor towards the treatment by which material is added or removed. The pretreated thread then undergoes the process by which material is added or removed, which process is operated continuously. Although the thread is being treated on its whole length, only the areas not having been subjected to the localized pretreatment are treated efficiently.
The pretreatment is preferably a localized impregnation with an inhibiting agent. It is convenient to choose the latter amongst the finishing products.
The choice between adding or removing some material is determined by the initial thread diameter and the final dimensions that are to be obtained. A thread generally is cylindrical, but the same effect would be achieved whatever the section of the thread to be treated may be; the different sections may not even have to be constantly similar on the whole thread length. The distribution of thick and thin segments should preferably be irregular in order to emphasize the new effect that is to be obtained. The same as transition from thin to thick segments may be regular or irregular .
It will be described hereafter the implementation of this treatment when removing excess material from a thread whose initial diameter is at least equal to the maximum diameter of the thread after treatment. The removal of material may be operated according to any of the conventional processes which adapts to the type of thread that is to be treated: immersion in a solvent bath at sufficiently high speed to produce only a superficial dissolution, action of a flame or any other method allowing the elimination of a superficial layer of the thread.
In order to obtain a thread presenting thick segments, this treatment of removing material while applied to the whole thread length must only be efficient on certain areas. The thread is therefore subjected to a pretreatment intended to protect the areas which must keep the initial thread diameter against the process of removing material.
In case the removal of material is being operated by subjecting the thread to the action of a flame, the pretreatment can consist of impregnating certain thread segments with liquid. The liquid can be just water or any other product fulfilling the same function. When the impregnated segments pass through the flame, the liquid is vaporized avoiding thereby the removal of material in that pretreated segment. On the contrary, the non-impregnated segments are attacked by the flame.
In case the removal of material is being realized by superficial dissolution, the thread can be locally impregnated with a product neutralizing the solvent and inhibiting thereby the latter's action on the thread.
It is preferable to effect an irregular localized pretreatment. The application of a "Device for the localized treatment of a thread", described in French Patent Application No. 72.10,915 (and its equivalent copending U.S. application Ser. No. 178,013, filed Mar. 26, 1973, suits especially well the result here sought. In fact, this device enables the localized and irregular projection of one or several products onto the thread moving continuously at high speed.
One of the most important advantages of the pretreatment is the possibility of combining the latter with other thread finishing processes, as for instance the dispersion of dye onto the thread, in which case the dye acts as inhibitor towards the removal of material while conferring on the treated thread an additional effect of intermittent dyeing. It is also possible to use several dyes. It appears clearly that a wide choice of very new and varied effects can be obtained, and this on a thread running continuously at high speed.
According to the nature of the treated thread, it may be more convenient and especially less expensive to adopt the application of additional material onto a thread whose initial diameter is no larger than the minimal diameter of the thread after treatment.
The implementation of this treatment does not differ essentially from the one above mentioned and will not be described further. For instance, the application of additional material can be operated by projection of material or else by immersing the thread in a coating bath after a pretreatment having made impossible the adherance of the added material on the pretreated thread segments.
According to the effect to be obtained, the application of additional material may be irregular in volume and/or length of treated or pretreated thread segments.
A particular application of this material adding process is the realization of composite threads if the added material is different from the initial thread composition.
The process has been described as applied to a textile thread, but it can also be applied to a textile product in the form of sliver or even in the form of sheets.
By textile thread is intended any supple product whose section is of small dimensions in relation to its length (thread, spun yarns, etc.), and which is composed in part or altogether of a textile material or the like, pure or in mixture.
New effects on finished textile products are constantly being sought, for instance by causing variations in density or volume. Some processes try to obtain these effects at the moment of knitting or weaving. Other processes try to modify the thread before subjecting the latter to the knitting or weaving. Amongst the latter may be quoted the methods of texturing which confer a new configuration on the thread, or the methods by which a number of regular threads are assembled in such a manner as to produce an irregular and original aspect.
It has also been tried to obtain threads of varied sections, that is to say threads presenting thin segments and thick segments. The best known process for synthetic yarn is space-drawing.
However, most of the conventional manufacture processes produce threads of a constant section on their whole length. The local application of additional material or the local removal of excess material has then been tried. Subject of French Patent no. 982,337 (or its equivalent British Patent No. 645,159) is a process for the local removal of material on a thread running continuously.
The application of these localized processes proves difficult while calling for complex installations, especially when irregular effects are to be obtained.
The present invention has as its object to obtain a thread presenting varied sections on its length by local addition or local removal of material, whereby the process of adding or removing material can be operated continuously.
To this end, the thread running continuously is subjected to a localized and discontinuous pretreatment, which pretreatment acts as inhibitor towards the treatment by which material is added or removed. The pretreated thread then undergoes the process by which material is added or removed, which process is operated continuously. Although the thread is being treated on its whole length, only the areas not having been subjected to the localized pretreatment are treated efficiently.
The pretreatment is preferably a localized impregnation with an inhibiting agent. It is convenient to choose the latter amongst the finishing products.
The choice between adding or removing some material is determined by the initial thread diameter and the final dimensions that are to be obtained. A thread generally is cylindrical, but the same effect would be achieved whatever the section of the thread to be treated may be; the different sections may not even have to be constantly similar on the whole thread length. The distribution of thick and thin segments should preferably be irregular in order to emphasize the new effect that is to be obtained. The same as transition from thin to thick segments may be regular or irregular .
It will be described hereafter the implementation of this treatment when removing excess material from a thread whose initial diameter is at least equal to the maximum diameter of the thread after treatment. The removal of material may be operated according to any of the conventional processes which adapts to the type of thread that is to be treated: immersion in a solvent bath at sufficiently high speed to produce only a superficial dissolution, action of a flame or any other method allowing the elimination of a superficial layer of the thread.
In order to obtain a thread presenting thick segments, this treatment of removing material while applied to the whole thread length must only be efficient on certain areas. The thread is therefore subjected to a pretreatment intended to protect the areas which must keep the initial thread diameter against the process of removing material.
In case the removal of material is being operated by subjecting the thread to the action of a flame, the pretreatment can consist of impregnating certain thread segments with liquid. The liquid can be just water or any other product fulfilling the same function. When the impregnated segments pass through the flame, the liquid is vaporized avoiding thereby the removal of material in that pretreated segment. On the contrary, the non-impregnated segments are attacked by the flame.
In case the removal of material is being realized by superficial dissolution, the thread can be locally impregnated with a product neutralizing the solvent and inhibiting thereby the latter's action on the thread.
It is preferable to effect an irregular localized pretreatment. The application of a "Device for the localized treatment of a thread", described in French Patent Application No. 72.10,915 (and its equivalent copending U.S. application Ser. No. 178,013, filed Mar. 26, 1973, suits especially well the result here sought. In fact, this device enables the localized and irregular projection of one or several products onto the thread moving continuously at high speed.
One of the most important advantages of the pretreatment is the possibility of combining the latter with other thread finishing processes, as for instance the dispersion of dye onto the thread, in which case the dye acts as inhibitor towards the removal of material while conferring on the treated thread an additional effect of intermittent dyeing. It is also possible to use several dyes. It appears clearly that a wide choice of very new and varied effects can be obtained, and this on a thread running continuously at high speed.
According to the nature of the treated thread, it may be more convenient and especially less expensive to adopt the application of additional material onto a thread whose initial diameter is no larger than the minimal diameter of the thread after treatment.
The implementation of this treatment does not differ essentially from the one above mentioned and will not be described further. For instance, the application of additional material can be operated by projection of material or else by immersing the thread in a coating bath after a pretreatment having made impossible the adherance of the added material on the pretreated thread segments.
According to the effect to be obtained, the application of additional material may be irregular in volume and/or length of treated or pretreated thread segments.
A particular application of this material adding process is the realization of composite threads if the added material is different from the initial thread composition.
The process has been described as applied to a textile thread, but it can also be applied to a textile product in the form of sliver or even in the form of sheets.