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Stretchable coated fabric and process for producing same

a technology of coated fabric and stretchable fabric, which is applied in the direction of knitting, liquid repellent fibres, weaving, etc., can solve the problems of heavy environmental burden of compounded fabrics, and achieve excellent waterproofness, good film forming properties, and excellent moisture permeability

Inactive Publication Date: 2015-05-21
SEIREN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a stretchable coated fabric treated with a fluorinated water repellent that is environmentally friendly. The fabric has good moisture permeability, waterproofness, and windproof property. The use of a C6 fluorinated water repellent prevents leakage of the resin to the back side and allows for a better film forming properties. A thixotropic index of the resin solution is controlled within a range to further improve the film forming properties.

Problems solved by technology

As their degradation products accumulate in the environment and in organisms, the compounds place a heavy burden on the environment.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

examples

[0058]Now, the present disclosure will be described more specifically with reference to Examples, although the present disclosure is not limited in any way to Examples described below.

[0059]As described below, stretchable coated fabrics according to Examples 1-5 of the present disclosure were produced to evaluate their performance. And for comparison, stretchable coated fabrics of Comparative Examples 1-4 were produced to evaluate their performance.

[0060]In Examples and Comparative Examples, measurement of various physical property values and evaluation of the performance of the stretchable coated fabrics were done as follows.

[0061](1) Thixotropic Index

[0062]The thixotropic index of the synthetic resin solutions is a ratio of a viscosity at a rotation speed of 6 rpm to a viscosity at a rotation speed of 30 rpm, as determined at 23° C. with a Brookfield-type (BM-type) viscometer from Toki Sangyo Co., Ltd. with a No. 4 spindle (without guard), and is represented by a general formula (...

example 1

[0090]A 33 dtex / 36 filament polyester yarn was used to knit an interlock knitted fabric by a 40 gauge flat knitting machine. Then, the fabric was scoured and dyed according to routine procedures. The knitted fabric dyed had a basis weight of 74 g / m2. The knitted fabric had a warp elongation at a load of 0.5 kgf of 8.6% and a warp elongation at a load of 2.0 kgf of 24.9%.

[0091]Next, the knitted fabric produced above was immersed in an aqueous solution containing two types of C6 fluorinated water repellents as described in Composition 1. The fabric was wrung out by a mangle (to a wet pick-up of 55% by weight), dried at 120° C. for 60 seconds, and then treated with heat at 160° C. for 60 seconds for water repellency. After the water-repellent treatment, the toluene repellency of the water-repellent fabric was measured to be 153 seconds.

[0092]

1) NUVA 2114 LIQ3.0%by weight(C6 fluorinated water repellentfrom Clariant (Japan) Co., Ltd.)2) ARKOPHOB NANO 2605 LIQ3.0%by weight(C6 fluorinated ...

example 2

[0097]A 22 dtex / 24 filament polyester yarn was used to knit an interlock knitted fabric by a 40 gauge flat knitting machine. Then, the fabric was scoured and dyed according to routine procedures. The knitted fabric dyed had a basis weight of 55 g / m2. The knitted fabric had a warp elongation at a load of 0.5 kgf of 9.6% and a warp elongation at a load of 2.0 kgf of 23.0%.

[0098]Next, the knitted fabric produced above was immersed in an aqueous solution containing two types of C6 fluorinated water repellents as described above in Composition 1. The fabric was wrung out by a mangle (to a wet pick-up of 53% by weight), dried at 120° C. for 60 seconds, and then treated with heat at 160° C. for 60 seconds for water repellency. After the water-repellent treatment, the toluene repellency of the water-repellent fabric was measured to be 144 seconds.

[0099]Next, the synthetic resin solution as described above in Composition 2 was applied by a floating knife coating process using a knife coater....

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

A stretchable coated fabric is treated for water repellency with a fluorinated water repellent that comprises a copolymer containing a perfluoroalkyl group with six or less carbon atoms (C6 fluorinated water repellent). The use of no C8 fluorinated water repellents that contain perfluorooctanoic acid, perfluorooctane sulfonate, and the like makes the fabric exerts no influence on the environment. And the fluorinated water repellent has a toluene repellency of 100 seconds or longer; a synthetic resin solution applied to at least one side of the stretchable fiber fabric has a thixotropic index at 23° C. in a range from 1.4 to 2.0; and the synthetic resin has a 100% modulus of 5 kgf / cm2 or greater. This prevents the synthetic resin from leaking to the back side and allows formation of a resin coating film that has good film forming properties.

Description

TECHNICAL FIELD[0001]The present disclosure relates to a stretchable coated fabric and a process for producing the same.BACKGROUND ART[0002]A need exists for a process for imparting water-oil-repellency to a surface of a garment that is a textile product. In particular, a process for using a C8 fluorinated water repellent to treat the surface has been used. As used herein, the term “C8 fluorinated water repellent” refers to a fluorinated water repellent that containing an emulsion of a copolymer comprises a perfluoroalkyl group with eight or more carbon atoms dispersed in a medium. However, the EPA (US Environmental Protection Agency) has discovered that the C8 fluorinated water repellents contain perfluorooctanoic acid, perfluorooctane sulfonate, and the like. These compounds degrade in the environment and in organisms. As their degradation products accumulate in the environment and in organisms, the compounds place a heavy burden on the environment. Thus, there is a need for a flu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D06M15/19D06N3/14D06N3/00
CPCD06M15/19D10B2501/00D06N3/144D06M2101/34D06M2101/32D06M2200/12D06N2201/0263D06N2201/02D06N2203/041D06N2203/068D06N2209/142D06N2211/10D10B2331/02D10B2331/04D06N3/0009Y10T442/2008Y10T442/2098D06N3/128D06N3/14D06N3/042D04B1/16D10B2401/10D10B2403/0112D04B1/00D06M15/564D06M15/643D06M15/263D06M15/256D04B21/16D04B1/18
Inventor MIZUMA, MASAHIROHORIKAWA, YASUHIRO
Owner SEIREN CO LTD