Title:
Making of paper product which surface layer possesses bactericidal action
Kind Code:
A1


Abstract:
A making method of paper product which surface layer possesses bactericidal action, that is to mix and heat the polygonal nano-silver particle, nano-far infrared particle and nano-polymer particle in order to make the nano-polymer particle instantly cover the nano-silver and far infrared particle at its semi-melted state to form a kind of semi melted nano-polymer compound membrane, place the membrane described above on the surface of paper sheets conveyed by a roller and at the same time, grind such semi melted nano-polymer compound membrane and paper sheets with a grinder to have the membrane incorporated into the surface of the sheets, and then furl it with a roller to make the surface of the paper products possess dense nano-silver and far infrared particle and to further perform the bactericidal activities. This method can be used to make food paper containers in mass-production.



Inventors:
Hsiao, Ju-kai (Nantou City, TW)
Application Number:
11/072441
Publication Date:
09/07/2006
Filing Date:
03/07/2005
Assignee:
Home Round Paper Co., Ltd.
Primary Class:
Other Classes:
162/135, 162/204, 162/205, 162/118
International Classes:
D21F2/00
View Patent Images:
Related US Applications:
20040161450Paper product with disinfecting propertiesAugust, 2004Buder
20060096722Method of treating cellulose fibresMay, 2006Greschik et al.
20050016703Smoothing deviceJanuary, 2005Steiner et al.
20060144537PaperboardJuly, 2006Schwonke
20070284070Paper Manufacturing ProcessDecember, 2007Kiviranta et al.
20070284072Sheath Provided With A Corrugated Edge For A Pressing DeviceDecember, 2007Schneid et al.
20030145964Reactive compositions and their use in paper productsAugust, 2003Shannon
20040060677Multi-functional paper and a method making the sameApril, 2004Huang
20070062654Treatment of wood chips using enzymesMarch, 2007Wang et al.
20030094256Shoe rollMay, 2003Heinzmann
20050016700Isolation of sclereidsJanuary, 2005Hoffmann et al.



Primary Examiner:
CORDRAY, DENNIS R
Attorney, Agent or Firm:
TROXELL LAW OFFICE PLLC (FALLS CHURCH, VA, US)
Claims:
What is claimed is:

1. A making method of paper products which surface layer possesses bactericidal action uses the nano-silver particle, nano-far infrared particle and nano-polymer particle as the raw materials and contains the following steps: a. Cut the nano-silver particle, nano-far infrared particle and nano-polymer particle into polygonal shape and mix them evenly in order to increase the concentration. b. Make the nano-polymer particle cover instantly the nano-silver particle and nano-far infrared particle at its semi melted. c. An extrusion machine 41 extrudes out continuously the mixture from the discharge exit to form a semi melted nano-polymer compound membrane 5 that falls between the two grinders. d. The aforesaid grinders grind the paper sheet that is conveyed simultaneously through the grinders. In this situation, the surface of the paper sheet and the compound membrane are attached closely, both of which are ground together and formed into the paper product that has the nano-polymer compound membrane on its surface. e. Roll the paper products with a roller. Because of the nano properties, the paper sheet which surface layer has the nano-silver particle and nano-far infrared particle on, therefore, is strengthened functionally and used for food containers that would be bactericidal, antibacterial and preserved.

2. As for the making method of paper products which surface layer possesses bactericidal activities described in claim 1, a temperature 135° C.˜140° C. is optimal to combine the nano-silver particle, nano-far infrared particle and nano-polymer particle with the nano-polymer particle.

3. As for the making method of paper products which surface layer possesses bactericidal activities described in claim 1, it is ideal to cut the nano-silver particle, nano-far infrared particle and nano-polymer particle into octagon in order to increase the contact area among the particles.

4. As for the making method of paper products which surface layer possesses bactericidal activities described in claim 1, the nano-silver particle and nano-far infrared particle is dispersed densely the surface of the nano-polymer compound membrane. Such surface should be used as the inside face of the paper containers, such as paper cups, paper bowls, paper lunch boxes, aluminum foil paper containers and aluminum foil bag. The container made of such paper sheet is bactericidal and antibacterial and can be directly used to packing food or other products or used in other fields.

Description:

BACKGROUND OF THE INVENTION

1) Field of the Invention

The present invention provides a making method of paper product which surface layer possesses bactericidal action, particularly a method that is to mix and heat the polygonal nano-silver particle, nano-far infrared particle and nano-polymer particle, all of which are cut into the same shape for the purpose of increasing the contact area and concentration, make the nano-polymer particle instantly cover the nano-silver and far infrared particle at its semi-melted state to form a kind of semi melted nano-polymer compound membrane, and then place the membrane described above on the surface of paper products closely, furl it with a roller to make the surface of the paper products possess dense nano-silver and far infrared particle and to further perform the bactericidal activities. This method can be used to make food paper containers.

2) Description of the Prior Art

In consideration of environmental protection, materials that are reused or that are of toxicant and nuisance free or spontaneous decomposition are required to make common containers. Paper products, including paper cups, paper bowels, paper plates and lunch boxes, not only satisfy that requirements but also have low cost and sanitation, so that it may be the best choice for customers.

SUMMARY OF THE INVENTION

I Problems

1. Although they are bactericidal, antibacterial and preserved, the common paper containers should be added with preservatives or put into a refrigerator as they are provided with food so as to arrive at a bactericidal effects. If the refrigeration temperature is not low enough the preservation would be unsatisfactory and the preservative will do harm to people.

2. Among the methods to keep the food above fresh, the high-temperature sterilization is the most effective. But the device of high-temperature sterilization is costly and not all common customers can afford it.

3. The paper containers that are made of common paper materials may bear the secondary pollution for the transportation and users' touch and its service life would be shortened when they are used to contain food. So that it is necessary to make an improvement.

II Countermeasures

1. The present invention is a making method of paper product, that is to mix and heat the polygonal nano-silver particle, nano-far infrared particle and nano-polymer particle, all of which are cut into the same shape for the purpose of increasing the contact area and concentration, make the nano-polymer particle instantly cover the nano-silver and far infrared particle at its semi-melted state to form a kind of semi melted nano-polymer compound membrane, and then place the membrane described above on the surface of paper products closely, furl it with a roller to make the surface of the paper products possess dense nano-silver and far infrared particle and to further perform the bactericidal activities. This method can be used to make food paper containers.

2. A temperature 135° C.˜140° C. is optimal to combine the nano-silver particle, nano-far infrared particle and nano-polymer particle contained in the present invention and to further form instantly a semi melted nano-polymer compound membrane, and at the same time, place such compound membrane on the surface of papers and roll it so as to make the paper products which surface is equipped with the compound membrane. This method can be used in mass production and create economic benefit.

3. The nano-polymer compound membrane placed on the paper products described in the present invention contains high-dense nano-silver and far infrared particle. The sterilization function possessed by the nano and the energy released by the far infrared can activate cells and make the containers made of them are bactericidal, antibacterial and preserved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 Flow Chart of the Present Invention Application

FIG. 2 Plan Map of Covering Membrane of the Present Invention

FIG. 3 Magnified Section Map of Membrane Covered Paper Products of the Present Invention

FIG. 4 Sketch Map of the Contact among Particles in Octagon of the Present Invention

APPENDIX I: STERILIZATION TEST REPORT OF THE PRESENT INVENTION

APPENDIX II: REPORT OF ENVIRONMENTAL PROTECTION AND AVIRULENCE TESTS OF THE PRESENT INVENTION

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

This present invention provides a making method of paper products which surface layer possesses bactericidal action. It is to make the nano-silver particle 1 directly into the strains by virtue of its strong structuring ability with the cell walls or membranes and rapidly combine with oxygen metabolic —SH so as to stop the metabolism and deactivate it and kill the bacteria. In addition, the nano-far infrared particle 2 can transmit by radiation energy into the tissue and further activate the cells and keep the food fresh.

Please refer to FIG. 1. In order to make the two different materials mentioned above coexisted in the surface of the paper products, the nano-polymer particle 3 is used as a media to combine the aforesaid nano-silver particle 1 and nano-far infrared particle. Cut in advance, therefore, the nano-silver particle 1′, nano-far infrared particle 2′ and nano-polymer particle 3′ into a same polygonal shape in order to increase the concentration as the three materials are mixed subject to the procedure 123. Pointed octagonal particles are preferable (see FIG. 4) so as to increase the contact area and concentration (see FIG. 2). So that it is ideal to heat the aforesaid nano-silver particle 1(1′), nano-far infrared particle 2(2′) and nano-polymer particle 3(3′) in a heater 40 at the temperature 135° C.˜140° C. after being mixed evenly 123 so as to make the nano-polymer particle 3(3′) cover instantly the nano-silver particle 1(1′) and nano-far infrared particle 2(2′) at its semi melted state to make them combined. An extrusion machine 41 extrudes out continuously the mixture from the discharge exit to form a semi melted nano-polymer compound membrane 5 that falls between the two grinders 6 and 6′ and falls in front of the paper sheet 7 which is conveyed simultaneously through the grinders. In this situation, the surface of the paper sheet 7 and the membrane 5 are attached closely, which make the nano-polymer compound membrane 5 and the surface of the paper sheet 7 combined into one. And then, roll the processed paper sheet 7 with a roller 8 and as shown in FIG. 3 a kind of paper sheet 7 which surface layer is provided with the nano-silver particles 1 and nano-far infrared particles 2 is obtained. Because of the nano properties, the paper sheet is strengthened functionally and used for food containers that would be bactericidal, antibacterial and preserved.

According to the making method described in the present invention, the nano-silver particle 1(1′) and nano-far infrared particle 2(2′) is dispersed densely the surface of the nano-polymer compound membrane. Such surface should be used as the inside face of the paper containers, such as paper cups, paper bowls, paper lunch boxes, aluminum foil paper containers and aluminum foil bag. The container made of such paper sheet is bactericidal and antibacterial and can be directly used to packing food or other products or used in other fields.

Because this nano-silver will do no harm to people, such as nontoxic, non-allergic, no kick, no bacteria variation, no drug-fast and no damage to the immunity system, and has a long-term antibacterial activities, the nano-polymer compound particles can be used to make the container for food or medical industries, which would be safe and sanitary and sees a big possible profit.

The sterilized activities of the nano-silver and far infrared membrane described in the present invention against the escherichia coli and staphylococcus aureus are tested by the lab that satisfies the CNLA and the corresponding results report (see Appendix 1) are presented below:

Tested Condition
Tested Group
Remaining countControl Group
(CFU) afterRemaining count
exposure 3(CFU) after exposure
Tested Species/hours/Killing Rate3 hours/Killing Rate
Bacterial Concentration(%)(%)
Escherichia coli0(100)8.5 × 103(0)
8.5 × 103 CFU
Ataphylococcus aureus2.2 × 102(94)3.5 × 103(0)
(141960)

The present invention, therefore, is bactericidal as shown in pages 2 and 3 in the Appendix I.

The results of the test of environmental protection and toxicity of the present invention are presented below (as Appendix II):

Test ItemDetermineResults
AppearanceThe liquid shall be clearLight yellow liquid
and no parts within.and no parts within
PH ValueThe difference of PH valueSample Solution: 8.03
between test sample andBlank Solution: 6.89
blank sample.Difference: 1.14
Heavy MetalThe color of the testThe color is light.
solution is light than
contrast solution then
considered qualified.
PotassiumThe difference of1.11 ppm
permanganateconsumption between two
Reducingsolutions shall be less than
Property10 ppm to be qualified.
EvaporateThe residuum shall be less 2.0 ppm
Residuumthan 30 ppm to be qualified.

Results for all solute extraction tests are agreed with the legislation, e.g. the results of the heavy metal, toxicity and residuum tests speak for the environmental protection and avirulence. See Appendix II.