US20180148865A1

US20180148865A1 - Polytetrafluoroethylene textile and manufacturing method thereof

Info

Publication number: US20180148865A1
Application number: US15/813,177
Authority: US
Inventors: Ching-Hai Liang; Huang-Shan Lin; Cheng-Hsuan Wu; Chih-Jui Lin
Original assignee: Everest Textile Co Ltd
Current assignee: Everest Textile Co Ltd
Priority date: 2016-11-25
Filing date: 2017-11-15
Publication date: 2018-05-31

Abstract

A polytetrafluoroethylene textile and manufacturing method thereof is disclosed. The method of manufacturing the polytetrafluoroethylene textile comprises: providing a polytetrafluoroethylene yarn and an artificial fiber yarn; and performing a knitting process to knit the polytetrafluoroethylene yarn and the artificial fiber yarn together to thereby obtain the polytetrafluoroethylene textile. The polytetrafluoroethylene textile comprises: an artificial fiber structural layer comprising a plurality of artificial fiber yarns; and a polytetrafluoroethylene structural layer comprising a plurality of polytetrafluoroethylene yarns, and a part of the polytetrafluoroethylene yarns of the polytetrafluoroethylene structural layer and a part of the artificial fiber yarns of the artificial fiber structural layer are knitted together.

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority from Taiwan Patent Application No. 105139002, filed on Nov. 25, 2016 and Taiwan Patent Application No. 105218114, filed on Nov. 25, 2016, in the Taiwan Intellectual Property Office, the content of which are hereby incorporated by reference in their entirety for all purposes.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a textile and a manufacturing method thereof, in particular with respect to a polytetrafluoroethylene textile and a manufacturing method thereof.

2. Description of the Related Art

In recent years, people gradually pay attention to the importance of the outdoor leisure activities, exercise and fitness, and for sports dress, light and comfortable and other functional clothing have also been stressed. Therefore, this type of functional clothing has gradually become the mainstream of development. In general, the outdoor leisure clothing that makes the user feel comfortable usually has the characteristic of surface water repellency, that is, its material is hydrophobic and also has the characteristic of draining moisture of human body, that is, fabric with moisture absorbing and perspiration dissipation functions, which is needed for the current market demand.
In order to achieve the effects of waterproofing and moisture permeation of the fabric, it is usually used to coat the water repellent on the fabric or adhere the waterproof and moisture permeable film to the surface fabric by coating or affixing method. However, the water repellent is often merely coated over the surface of the fabric by coating the water repellent on the fabric. The water repellent will be easily lost due to friction after repeated use, external friction and washing, resulting in water repellent function decline and shortcomings of poor durability. The original permeability of the fabric is often damaged because too much amount of resin coating block the pores between the fabric fibers by using the affixing or lamination method to laminate the waterproof and moisture permeable film on the surface of the fabric, resulting in shortcomings of obstructing permeability of the fabric.

SUMMARY OF THE INVENTION

In view of the aforementioned technical problems of the prior art, one purpose of the present invention is to provide a polytetrafluoroethylene textile and a manufacturing method thereof so as to solve the problem of shortcomings of poor durability and permeability of the waterproof and moisture fabric manufactured according to the prior art.
In order to accomplish the preceding purpose, the present invention provides a method of manufacturing a polytetrafluoroethylene textile, comprising: providing a polytetrafluoroethylene yarn and an artificial fiber yarn; and performing a knitting process to knit the polytetrafluoroethylene yarn and the artificial fiber yarn together to thereby obtain the polytetrafluoroethylene textile.
In the method of manufacturing a polytetrafluoroethylene textile of the present invention, a pretreatment process is further performed before performing the knitting process to make the polytetrafluoroethylene yarn have at least one knit-assisting part for assisting knitting the polytetrafluoroethylene yarn and the artificial fiber yarn together and confining the artificial fiber yarn correspondingly to thereby obtain the polytetrafluoroethylene textile, wherein the knit-assisting part is an expanded structure formed by at least two of the polytetrafluoroethylene yarns, and a part of the artificial fiber yarn is configured to pass through the knit-assisting part to thereby knit with the at least two of the polytetrafluoroethylene yarns.
The method of manufacturing a polytetrafluoroethylene textile of the present invention further comprises performing a laminating process to laminate a water repellent fabric with the polytetrafluoroethylene textile together.
Wherein the artificial fiber yarn is selected from a group consisting of nylon yarn, polyester yarn and spandex yarn, the denier of the polytetrafluoroethylene yarn being within a range of from 40 to 400 denier, the denier of the nylon yarn being within a range of from 20 to 280 denier, the denier of the polyester yarn being within a range of from 20 to 300 denier, the denier of the spandex yarn being within a range of from 15 to 70 denier.
Wherein a weight ratio of the nylon yarn to the polytetrafluoroethylene yarn is within a range of 25-45:55-75 if the artificial fiber yarn is the nylon yarn, and a weight ratio of the polyester yarn to the polytetrafluoroethylene yarn to the spandex yarn is within a range of 50-65:34-40:1-10 if the artificial fiber yarn is consisted of the polyester yarn and the spandex yarn.
Further, the present invention also provides a polytetrafluoroethylene textile manufactured according to the method mentioned above. The polytetrafluoroethylene textile comprises an artificial fiber structural layer comprising a plurality of artificial fiber yarns; and a polytetrafluoroethylene structural layer comprising a plurality of polytetrafluoroethylene yarns, and a part of the polytetrafluoroethylene yarns of the polytetrafluoroethylene structural layer and a part of the artificial fiber yarns of the artificial fiber structural layer are knitted together.
Wherein the polytetrafluoroethylene structural layer has at least one knit-assisting part for assisting knitting the part of the polytetrafluoroethylene yarns and the part of the artificial fiber yarns together and confining the part of the artificial fiber yarns correspondingly to thereby obtain the polytetrafluoroethylene textile, wherein the knit-assisting part is an expanded structure formed by at least two of the polytetrafluoroethylene yarns, and the part of the artificial fiber yarns of the artificial fiber structural layer is configured to pass through the knit-assisting part to thereby knit with the at least two of the polytetrafluoroethylene yarns.
The method of manufacturing a polytetrafluoroethylene textile of the present invention further comprises a water repellent structural layer disposed on the artificial fiber structural layer, and the water repellent structural layer and the polytetrafluoroethylene structural layer are disposed on two opposite sides of the artificial fiber structural layer respectively.
Wherein the artificial fiber structural layer is selected from a group consisting of nylon yarn layer, polyester yarn layer and spandex yarn layer, the denier of the polytetrafluoroethylene yarns being within a range of from 40 to 400 denier, the denier of nylon yarns of the nylon yarn layer being within a range of from 20 to 280 denier, the denier of polyester yarns of the polyester yarn layer being within a range of from 20 to 300 denier, the denier of spandex yarns of the spandex yarn layer being within a range of from 15 to 70 denier, and a weight ratio of the nylon yarn layer to the polytetrafluoroethylene structural layer is within a range of 25-45:55-75 if the artificial fiber structural layer is the nylon yarn layer, and a weight ratio of the polyester yarn layer to the polytetrafluoroethylene structural layer to the spandex yarn layer is within a range of 50-65:34-40:1-10 if the artificial fiber structural layer is consisted of the polyester yarn layer and the spandex yarn layer.
In accordance with the preceding description, the polytetrafluoroethylene textile and the manufacturing method thereof of the present invention may have one or more following advantages:
(1) In the polytetrafluoroethylene textile and the manufacturing method thereof of the present invention, the polytetrafluoroethylene textile with characteristics of high durability and permeability can be manufactured by knitting the polytetrafluoroethylene yarn(s) and the artificial fiber yarn(s) together.
(2) In the method of manufacturing the polytetrafluoroethylene textile of the present invention, the pretreatment process is performed before performing the knitting process to make the polytetrafluoroethylene yarn have the knit-assisting part to thereby facilitate knitting the polytetrafluoroethylene yarn and the artificial fiber yarn together and confining the artificial fiber yarn correspondingly. Therefore, the structure of the polytetrafluoroethylene textile manufactured by the method of the present invention is strong.
(3) In the polytetrafluoroethylene textile and the manufacturing method thereof of the present invention, the abilities of waterproofing and moisture permeation of the polytetrafluoroethylene textile can be improved by performing the laminating process to laminate the water repellent fabric with the polytetrafluoroethylene textile together.
(4) In the polytetrafluoroethylene textile and the manufacturing method thereof of the present invention, the manufactured polytetrafluoroethylene textile has excellent characteristics of moisture-proof, water resistance and water repellent by using specific materials and specifications of the artificial fiber yarn.
For better understanding and knowledge of the technical features and attainable technical effects of the present invention, it is to be understood that the preferred embodiments and the accompanying detailed description are given hereinafter.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic flow diagram of the first preferred embodiment of the method of manufacturing the polytetrafluoroethylene textile of the present invention.

FIG. 2 is a schematic flow diagram of the second preferred embodiment of the method of manufacturing the polytetrafluoroethylene textile of the present invention.

FIG. 3 is a schematic flow diagram of the third preferred embodiment of the method of manufacturing the polytetrafluoroethylene textile of the present invention.

FIG. 4 is a side view diagram of the first preferred embodiment of the polytetrafluoroethylene textile of the present invention.

FIG. 5 is a side view diagram of the second preferred embodiment of the polytetrafluoroethylene textile of the present invention.

FIG. 6a is a photographic diagram of the polytetrafluoroethylene textile comprising 75 denier polyester yarn layer, 200 denier polytetrafluoroethylene structural layer and 20 denier spandex yarn layer with the weight ratio of 61:37:2 after 50,000 wear resistant revolutions; and FIG. 6b is a photographic diagram of the polytetrafluoroethylene textile comprising 70 denier nylon yarn layer and 200 denier polytetrafluoroethylene structural layer with the weight ratio of 38:62 after 40,000 wear resistant revolutions.

FIG. 7a is a photographic diagram of the knit-assisting part of the present invention; FIG. 7b is an enlarged diagram of FIG. 7a ; and FIG. 8 is a photographic diagram of the knit-assisting part of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

For purposes of understanding the technical features, contents, advantages and technical effects achieved thereby, various embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. Drawings are used for illustrating and assisting in understanding the detailed description, not represent the real scale and precise configuration of the present invention. Therefore, the claims cope of the subject matter are not interpreted or limited by the scale and configuration of the accompanying drawings. Further, for purposes of explanation, in the drawings, similar symbols typically identify similar components, unless context dictates otherwise.
Referring to FIG. 1, FIG. 1 is a schematic flow diagram of the first preferred embodiment of the method of manufacturing the polytetrafluoroethylene textile of the present invention. As shown in FIG. 1, the method of manufacturing a polytetrafluoroethylene textile of the present invention comprises at least the following steps S10 and S20. In step S10, providing a polytetrafluoroethylene yarn and an artificial fiber yarn. In step S20, performing a knitting process to knit the polytetrafluoroethylene yarn and the artificial fiber yarn together to thereby obtain the polytetrafluoroethylene textile. The manner for knitting the polytetrafluoroethylene yarn and the artificial fiber yarn can be, for example, plain weave or chain stitch, but not limited thereto. Users can use the appropriate knitting or weaving manner to knit or weave the polytetrafluoroethylene yarn and the artificial fiber yarn together depending on actual needs.
The polytetrafluoroethylene (PTFE) yarn can be manufactured, for example, by a split spinning method, an extrusion spinning method, a carrier spinning method or a melt spinning method, but not limited thereto. All the polytetrafluoroethylene yarns manufactured by any method or manner for manufacturing the polytetrafluoroethylene yarn are the polytetrafluoroethylene yarn claimed by the present invention. The polytetrafluoroethylene yarn in the present invention is substantially free of other ingredients or impurities, that is, the composition of the polytetrafluoroethylene yarn is substantially 100% polytetrafluoroethylene. Or the polytetrafluoroethylene yarn can include other ingredients or impurities. Users can select and use the polytetrafluoroethylene yarn including or excluding other ingredients or impurities depending on actual needs. The denier of the polytetrafluoroethylene yarn is within a range of from 40 to 400 deniers, preferably 200 deniers, but not limited thereto. Users can use the polytetrafluoroethylene yarn with appropriate denier specification depending on actual needs.
The artificial fiber is also known as chemical fiber, which is the fiber manufactured by chemical method and include, but not limited to, polyester, nylon and spandex. In the present invention, the artificial fiber yarn can be, for example, selected from a group consisting of nylon yarn, polyester yarn and spandex yarn. In one preferred embodiment, the artificial fiber yarn is such as nylon yarn, polyester yarn or spandex yarn with single ingredient. In another preferred embodiment, the artificial fiber yarn is such as yarns with composite ingredients. For example, the artificial fiber yarn is the yarn comprising nylon and polyester ingredients; polyester and spandex ingredients; or nylon, polyester and spandex ingredients. The denier of the nylon yarn can be, for example, within a range of from 20 to 280 deniers, preferably 70 deniers, but not limited thereto. The denier of the polyester yarn can be, for example, within a range of from 20 to 300 deniers, preferably 75 deniers, but not limited thereto. The denier of the spandex yarn can be, for example, within a range of from 15 to 70 deniers, preferably 20 deniers, but not limited thereto. Moreover, in one preferred embodiment, the artificial fiber yarn is the nylon yarn, and a weight ratio of the nylon yarn to the polytetrafluoroethylene yarn can be, for example, within a range of 25-45:55-75. In another preferred embodiment, the artificial fiber yarn is consisted of the polyester yarn and the spandex yarn, and a weight ratio of the polyester yarn to the polytetrafluoroethylene yarn to the spandex yarn can be, for example, within a range of 50-65:34-40:1-10. Users can use the artificial fiber yarn with appropriate ingredient(s) and specification depending on actual needs, and similarly, users can use the artificial fiber yarn and the polytetrafluoroethylene yarn with appropriate content and ratio depending on actual needs.
Referring to FIG. 2, FIG. 2 is a schematic flow diagram of the second preferred embodiment of the method of manufacturing the polytetrafluoroethylene textile of the present invention. As shown in FIG. 2, the method of manufacturing a polytetrafluoroethylene textile of the present invention comprises at least the following steps S10, S20 and S30. The difference between the second embodiment and the first embodiment of the present invention is merely that in the second embodiment, a pretreatment process S30 is further performed before performing the knitting process S20 to make the polytetrafluoroethylene yarn have at least one knit-assisting part for assisting knitting the polytetrafluoroethylene yarn and the artificial fiber yarn together and confining the artificial fiber yarn correspondingly to thereby obtain the polytetrafluoroethylene textile.
The pretreatment process S30 can be, for example but not limited to, performed by gluing or twisting method so as to make the polytetrafluoroethylene yarn have the knit-assisting part. The structure of the polytetrafluoroethylene yarn can be changed by the aforementioned gluing or twisting method to make the polytetrafluoroethylene yarn have the knit-assisting part. Moreover, all regions or partial regions of the polytetrafluoroethylene yarn can have the knit-assisting part, and the knit-assisting part can be regularly or irregularly distributed on the polytetrafluoroethylene yarn. And, users can adjust the position and/or size of the knit-assisting part depending on actual needs.
In addition, the pretreatment process S30 can also be performed to the artificial fiber yarn to make the artificial fiber yarn have at least one knit-assisting part for assisting knitting the polytetrafluoroethylene yarn and the artificial fiber yarn together and confining the polytetrafluoroethylene yarn correspondingly to thereby obtain the polytetrafluoroethylene textile. In other words, the pretreatment process S30 can be performed to the polytetrafluoroethylene yarn and/or the artificial fiber yarn by users depending on actual needs to make the polytetrafluoroethylene yarn and/or the artificial fiber yarn have at least one knit-assisting part.
In the present invention, a laminating process can be further performed to laminate a water repellent fabric with the polytetrafluoroethylene textile together. Referring to FIG. 3, FIG. 3 is a schematic flow diagram of the third preferred embodiment of the method of manufacturing the polytetrafluoroethylene textile of the present invention. As shown in FIG. 3, the laminating process S40 is performed after the knitting process S20 to laminate the water repellent fabric with the polytetrafluoroethylene textile together. The material of the water repellent fabric can be, for example, polyethylene terephthalate (PET), but not limited thereto. The water repellent fabric can comprise a water repellent structure layer and a transparent membrane structure layer, wherein the material of the water repellent structure layer can be polyethylene terephthalate (PET), and the material of the transparent membrane structure layer can be polyurethane (PU), but not limited thereto. For example, the water repellent fabric and the polytetrafluoroethylene textile can be laminated together by the method of PU foam flame burning, PU wet glue spray paste or PUR hot melt adhesive paste. The aforementioned laminating methods of the water repellent fabric and the polytetrafluoroethylene textile are examples, but not limited thereto. Users can use appropriate laminating methods to laminate the water repellent fabric and the polytetrafluoroethylene textile together depending on actual needs.
The difference between the third embodiment and the first embodiment of the present invention is merely that in the third embodiment, a laminating process S40 is further performed to laminate the water repellent fabric with the polytetrafluoroethylene textile together after performing the knitting process S20. Moreover, in the third embodiment of the present invention, the pretreatment process S30 can also be performed before performing the knitting process S20 to make the polytetrafluoroethylene yarn have at least one knit-assisting part for assisting knitting the polytetrafluoroethylene yarn and the artificial fiber yarn together and confining the artificial fiber yarn correspondingly to thereby obtain the polytetrafluoroethylene textile (in order to simplify the figure, the step S30 is not shown in FIG. 3). The method for performing the pretreatment process S30 is described in the aforementioned second embodiment and will not be more detailed described here.
Referring to FIG. 4, FIG. 4 is a side view diagram of the first preferred embodiment of the polytetrafluoroethylene textile of the present invention. The polytetrafluoroethylene textile of the present invention can be, for example, manufactured by the aforementioned method of manufacturing a polytetrafluoroethylene textile. As shown in FIG. 4, the polytetrafluoroethylene textile can at least comprise an artificial fiber structural layer 10 and a polytetrafluoroethylene structural layer 20. The artificial fiber structural layer 10 can comprise a plurality of artificial fiber yarns, and the polytetrafluoroethylene structural layer 20 can comprise a plurality of polytetrafluoroethylene yarns. And, a part of the polytetrafluoroethylene yarns of the polytetrafluoroethylene structural layer 20 and a part of the artificial fiber yarns of the artificial fiber structural layer 10 are knitted together. The part of the polytetrafluoroethylene yarns of the polytetrafluoroethylene structural layer 20 and the part of the artificial fiber yarns of the artificial fiber structural layer 10 can be knitted together by method of plain weave or chain stitch, but not limited thereto. Users can use the appropriate knitting or weaving manner to knit or weave the polytetrafluoroethylene yarns and the artificial fiber yarns together depending on actual needs.
The artificial fiber structural layer 10 can be, for example, selected from a group consisting of nylon yarn layer, polyester yarn layer and spandex yarn layer. And, the nylon yarn layer can comprise a plurality of nylon yarns, the polyester yarn layer can comprise a plurality of polyester yarns, and spandex yarn layer can comprise a plurality of spandex yarns. As mentioned above, in one preferred embodiment, the artificial fiber structural layer 10 can comprise, for example, nylon yarns, polyester yarns or spandex yarns with single ingredient. In another preferred embodiment, the artificial fiber structural layer 10 can comprise yarns with composite ingredients. For example, the artificial fiber structural layer 10 can comprise, for example, nylon yarns and polyester yarns; polyester yarns and spandex yarns; or nylon yarns, polyester yarns and spandex yarns.
The denier of the polytetrafluoroethylene yarns can be, for example, within a range of from 40 to 400 deniers, preferably 200 deniers, but not limited thereto. Users can use the polytetrafluoroethylene yarns with appropriate denier specification depending on actual needs. The denier of nylon yarns of the nylon yarn layer can be, for example, within a range of from 20 to 280 deniers, preferably 70 deniers, but not limited thereto. The denier of polyester yarns of the polyester yarn layer can be, for example, within a range of from 20 to 300 deniers, preferably 75 deniers, but not limited thereto. The denier of spandex yarns of the spandex yarn layer can be, for example, within a range of from 15 to 70 deniers, preferably 20 deniers, but not limited thereto. Moreover, in one preferred embodiment, the artificial fiber structural layer 10 is the nylon yarn layer, and a weight ratio of the nylon yarn layer to the polytetrafluoroethylene structural layer 20 can be, for example, within a range of 25-45:55-75. In another preferred embodiment, the artificial fiber structural layer 10 is consisted of the polyester yarn layer and the spandex yarn layer, and a weight ratio of the polyester yarn layer to the polytetrafluoroethylene structural layer 20 to the spandex yarn layer can be, for example, within a range of 50-65:34-40:1-10. Users can use the artificial fiber yarns with appropriate ingredient(s) and specification depending on actual needs, and similarly, users can use the artificial fiber yarns and the polytetrafluoroethylene yarns with appropriate content and ratio depending on actual needs.
The polytetrafluoroethylene textile of the present invention can further comprise a water repellent structural layer. Referring to FIG. 5, FIG. 5 is a side view diagram of the second preferred embodiment of the polytetrafluoroethylene textile of the present invention. As shown in FIG. 5, the difference between the second embodiment and the first embodiment of the present invention is merely that the polytetrafluoroethylene textile in the second embodiment further comprise the water repellent structural layer 30 disposed on the artificial fiber structural layer 10, and the water repellent structural layer 30 and the polytetrafluoroethylene structural layer 20 can be disposed on two opposite sides of the artificial fiber structural layer 10 respectively. The water repellent structural layer 30 can be, for example, polyethylene terephthalate (PET) structural layer, but not limited thereto. In addition, a polyurethane (PU) structural layer 40 can be further disposed between the water repellent structural layer 30 and the artificial fiber structural layer 10. As mentioned above, the water repellent structural layer 30, the polyurethane structural layer 40 and the artificial fiber structural layer 10 can be laminated together by the method of PU foam flame burning, PU wet glue spray paste or PUR hot melt adhesive paste.
In one preferred embodiment, the artificial fiber structural layer 10 of the polytetrafluoroethylene textile in the present invention comprises 70 denier nylon yarn layer, and the weight ratio of the nylon yarn layer to the 200 denier polytetrafluoroethylene structural layer 20 can be, for example, within a range of 25-45:55-75. Preferably, the weight ratio of the nylon yarn layer to the 200 denier polytetrafluoroethylene structural layer 20 can be 38:62 (weight per unit area is 213±3% g/sm, 0±3% g/y or 6.28±3% oz/sy). And, if the weight ratio of the nylon yarn layer to the 200 denier polytetrafluoroethylene structural layer 20 is 38:62, the number of the wear resistant revolutions of the polytetrafluoroethylene textile is 40,000. In addition, the water repellent structural layer 30 and the polyurethane (PU) structural layer 40 are further disposed on the artificial fiber structural layer 10 of the polytetrafluoroethylene textile of the present invention. In this preferred embodiment, the overall polytetrafluoroethylene textile is a kind of three layers waterproof and moisture permeable swatch and has characteristics of water vapor resistance (Ret) equal to or smaller than 15 Pa*m²/W, hydrostatic pressure equal to or larger than 15,000 mmH₂O, and water repellent effect equal to or larger than 80 after washing 20 times (AATCC 22). Water vapor resistance (Ret) is a fabric moisture-penetrable method, to measure water vapor penetration fabric input and output difference pressure.
In another preferred embodiment, the artificial fiber structural layer 10 of the polytetrafluoroethylene textile in the present invention comprises 75 denier polyester yarn layer and 20 denier spandex yarn layer, and the weight ratio of the weight ratio of the polyester yarn layer to the 200 denier polytetrafluoroethylene structural layer 20 to the spandex yarn layer can be, for example, within a range of 50-65:34-40:1-10. Preferably, the weight ratio of the polyester yarn layer to the 200 denier polytetrafluoroethylene structural layer 20 to the spandex yarn layer can be 61:37:2 (weight per unit area is 247±5% g/sm, 0±5% g/y or 7.29±5% oz/sy). And, if the weight ratio of the polyester yarn layer to the 200 denier polytetrafluoroethylene structural layer 20 to the spandex yarn layer is 61:37:2, the number of the wear resistant revolutions of the polytetrafluoroethylene textile is 50,000. In addition, the water repellent structural layer 30 and the polyurethane (PU) structural layer 40 are further disposed on the artificial fiber structural layer 10 of the polytetrafluoroethylene textile of the present invention. In this preferred embodiment, the overall polytetrafluoroethylene textile is a kind of three layers waterproof and moisture permeable swatch and has characteristics of water vapor resistance (Ret) equal to or smaller than 15 Pa*m²/W, hydrostatic pressure equal to or larger than 15,000 mmH₂O, and water repellent effect equal to or larger than 80 after washing 20 times (AATCC 22).
The abrasion resistance test of the fabric is a test to measure the characteristic of abrasion resistance of the fabric. The abrasion resistance test of the fabric is performed by repeatedly rubbing the fabric with other objects and determined the damage content of the fabric such as broken yarn, holes, fade and so on during the using period. The abrasion resistance of the fabric can also be determined by the weight loss of the fabric after a certain amount of wear. Under the same conditions, the greater the weight loss, the worse the abrasion resistance of the fabric. Abrasion resistance is one of the important indicators of textile product quality, and will directly affect the durability and the using results of products.
The characteristic of the abrasion resistance of the aforementioned polytetrafluoroethylene textile was measured by the following methods: performing the ASTM D4966 friction test standard by a Martindale Abrasion Tester; rubbing the polytetrafluoroethylene textile with a woven fiber cloth with wool material according to a certain rotation track (Lissajous Figure: Lee's graphics); and evaluating the number of the wear resistant revolutions of the polytetrafluoroethylene textile, that is the rotation number of the wear resistant revolutions of the fabric due to friction when the broken yarn or hole of the test sample is produced. The polytetrafluoroethylene textiles after the abrasion resistance test are shown in FIG. 6a and FIG. 6b , wherein FIG. 6a is a photographic diagram of the polytetrafluoroethylene textile comprising 75 denier polyester yarn layer, 200 denier polytetrafluoroethylene structural layer and 20 denier spandex yarn layer with the weight ratio of 61:37:2 after 50,000 wear resistant revolutions, and FIG. 6b is a photographic diagram of the polytetrafluoroethylene textile comprising 70 denier nylon yarn layer and 200 denier polytetrafluoroethylene structural layer with the weight ratio of 38:62 after 40,000 wear resistant revolutions. As can be seen in FIG. 6a and FIG. 6b , the polytetrafluoroethylene textile of the present invention has a high degree of abrasion resistance.
In the polytetrafluoroethylene textile of the present invention, the polytetrafluoroethylene structural layer 20 has at least one knit-assisting part 22. Referring to FIG. 7a , FIG. 7b and FIG. 8, FIG. 7a is a photographic diagram of the knit-assisting part of the present invention; FIG. 7b is an enlarged diagram of FIG. 7a ; and FIG. 8 is a photographic diagram of the knit-assisting part of the present invention. As shown in FIG. 7a , FIG. 7b and FIG. 8, the polytetrafluoroethylene structural layer 20 has the knit-assisting part 22 for assisting knitting a part of the polytetrafluoroethylene yarn and a part of the artificial fiber yarn together and confining the part of the artificial fiber yarn correspondingly to thereby obtain the polytetrafluoroethylene textile of the present invention. For example, the knit-assisting part 22 can be an expanded structure formed by at least two of the polytetrafluoroethylene yarns, and the part of the artificial fiber yarns of the artificial fiber structural layer 10 can be configured to pass through the knit-assisting part 22 to thereby knit with the at least two of the polytetrafluoroethylene yarns. The knit-assisting part 22 can be manufactured by the aforementioned pretreatment process S30, but not limited thereto. By performing the pretreatment process S30 to make the polytetrafluoroethylene structural layer 20 have the knit-assisting part 22, the artificial fiber yarns of the artificial fiber structural layer 10 can be knitted with the polytetrafluoroethylene yarns of the polytetrafluoroethylene structural layer 20 by passing the through the knit-assisting part 22 more easily, and the artificial fiber structural layer 10 and the polytetrafluoroethylene structural layer 20 can be strongly knitted together. As mentioned above, all regions or partial regions of the polytetrafluoroethylene structural layer 20 can have the knit-assisting part 22, and the knit-assisting part 22 can be regularly or irregularly distributed on the polytetrafluoroethylene structural layer 20. And, users can adjust the position and/or size of the knit-assisting part 22 depending on actual needs.
In addition, as shown in FIG. 8, FIG. 8 is a top view of polytetrafluoroethylene textile. The polytetrafluoroethylene yarns of the polytetrafluoroethylene structural layer 20 and the artificial fiber yarns of the artificial fiber structural layer 10 can be knitted and regularly patterned. By designing the knitting location of the polytetrafluoroethylene yarns and the artificial fiber yarns, the pattern style of the polytetrafluoroethylene structural layer 20 can be designed depending on actual needs. And, because of the low friction characteristic of the polytetrafluoroethylene yarns, the characteristics of low cost, high permeability and abrasion resistance can be achieved by designing the knitting pattern of the polytetrafluoroethylene yarns and then knitting with the artificial fiber structural layer 10 without knitting with the artificial fiber yarns comprehensively.
In summary, in the polytetrafluoroethylene textile and the manufacturing method thereof of the present invention, the polytetrafluoroethylene textile with characteristics of high durability and permeability can be manufactured by knitting the polytetrafluoroethylene yarn(s) and the artificial fiber yarn(s) together. And, the pretreatment process is performed before performing the knitting process to make the polytetrafluoroethylene yarn have the knit-assisting part to thereby facilitate knitting the polytetrafluoroethylene yarn and the artificial fiber yarn together and confining the artificial fiber yarn correspondingly. Therefore, the structure of the polytetrafluoroethylene textile manufactured by the method of the present invention is strong. Moreover, the abilities of waterproofing and moisture permeation of the polytetrafluoroethylene textile can be improved by performing the laminating process to laminate the water repellent fabric with the polytetrafluoroethylene textile together. And, the manufactured polytetrafluoroethylene textile has excellent characteristics of moisture-proof, water resistance and water repellent by using specific materials and specifications of the artificial fiber yarn.
While the invention has been described by way of example(s) and in terms of the preferred embodiment(s), it is to be understood that the invention is not limited thereto. On the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.

Claims

What is claimed is:

1. A method of manufacturing a polytetrafluoroethylene textile, comprising:

providing a polytetrafluoroethylene yarn and an artificial fiber yarn; and

performing a knitting process to knit the polytetrafluoroethylene yarn and the artificial fiber yarn together to thereby obtain the polytetrafluoroethylene textile,

wherein a pretreatment process is further performed before performing the knitting process to make the polytetrafluoroethylene yarn have at least one knit-assisting part for assisting knitting the polytetrafluoroethylene yarn and the artificial fiber yarn together and confining the artificial fiber yarn correspondingly to thereby obtain the polytetrafluoroethylene textile, wherein the knit-assisting part is an expanded structure formed by at least two of the polytetrafluoroethylene yarns, and a part of the artificial fiber yarn is configured to pass through the knit-assisting part to thereby knit with the at least two of the polytetrafluoroethylene yarns.

2. The method of claim 1, further comprising performing a laminating process to laminate a water repellent fabric with the polytetrafluoroethylene textile together.

3. The method of claim 1, wherein the artificial fiber yarn is selected from a group consisting of nylon yarn, polyester yarn and spandex yarn, the denier of the polytetrafluoroethylene yarn being within a range of from 40 to 400 denier, the denier of the nylon yarn being within a range of from 20 to 280 denier, the denier of the polyester yarn being within a range of from 20 to 300 denier, the denier of the spandex yarn being within a range of from 15 to 70 denier.

4. The method of claim 3, wherein a weight ratio of the nylon yarn to the polytetrafluoroethylene yarn is within a range of 25-45:55-75 if the artificial fiber yarn is the nylon yarn, and a weight ratio of the polyester yarn to the polytetrafluoroethylene yarn to the spandex yarn is within a range of 50-65:34-40:1-10 if the artificial fiber yarn is consisted of the polyester yarn and the spandex yarn.

5. A polytetrafluoroethylene textile manufactured according to the method as claimed in claim 1, comprising:

an artificial fiber structural layer comprising a plurality of artificial fiber yarns; and

a polytetrafluoroethylene structural layer comprising a plurality of polytetrafluoroethylene yarns, and a part of the polytetrafluoroethylene yarns of the polytetrafluoroethylene structural layer and a part of the artificial fiber yarns of the artificial fiber structural layer are knitted together,

wherein the polytetrafluoroethylene structural layer has at least one knit-assisting part for assisting knitting the part of the polytetrafluoroethylene yarns and the part of the artificial fiber yarns together and confining the part of the artificial fiber yarns correspondingly to thereby obtain the polytetrafluoroethylene textile, wherein the knit-assisting part is an expanded structure formed by at least two of the polytetrafluoroethylene yarns, and the part of the artificial fiber yarns of the artificial fiber structural layer is configured to pass through the knit-assisting part to thereby knit with the at least two of the polytetrafluoroethylene yarns.

6. The polytetrafluoroethylene textile of claim 5, further comprising a water repellent structural layer disposed on the artificial fiber structural layer, and the water repellent structural layer and the polytetrafluoroethylene structural layer are disposed on two opposite sides of the artificial fiber structural layer respectively.

7. The polytetrafluoroethylene textile of claim 5, wherein the artificial fiber structural layer is selected from a group consisting of nylon yarn layer, polyester yarn layer and spandex yarn layer, the denier of the polytetrafluoroethylene yarns being within a range of from 40 to 400 denier, the denier of nylon yarns of the nylon yarn layer being within a range of from 20 to 280 denier, the denier of polyester yarns of the polyester yarn layer being within a range of from 20 to 300 denier, the denier of spandex yarns of the spandex yarn layer being within a range of from 15 to 70 denier, and a weight ratio of the nylon yarn layer to the polytetrafluoroethylene structural layer is within a range of 25-45:55-75 if the artificial fiber structural layer is the nylon yarn layer, and a weight ratio of the polyester yarn layer to the polytetrafluoroethylene structural layer to the spandex yarn layer is within a range of 50-65:34-40:1-10 if the artificial fiber structural layer is consisted of the polyester yarn layer and the spandex yarn layer.