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Artificial leather and method for producing the same

A technology of artificial leather and imitation suede, applied in textiles and papermaking, etc., can solve the problems of not yet obtained fiber grip and feel, and damaged artificial leather feel.

Inactive Publication Date: 2009-03-18
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the polymer elastic body tends to move and hold the fibers excessively, so the texture of the obtained artificial leather tends to be impaired.
[0006] As mentioned above, in artificial leather obtained by using an aqueous polymer elastomer dispersion, a material that can sufficiently satisfy both fiber grip and hand feeling has not yet been obtained.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] 10 mol% isophthalic acid copolymerized polyethylene terephthalate (melting point 234°C) as the island component, a polyvinyl alcohol copolymer containing 10 mol% ethylene units, a degree of saponification of 98.4 mol%, and a melting point of 210°C (Co., Ltd. Kurare Co., Ltd. Co., Ltd.) was made of sea-island fibers with sea-island fibers of 64 islands with sea-component / island component=30 / 70 (mass ratio) for composite spinning. Stretch it to obtain a monofilament fineness of 5.5dtex, an island fiber of 0.026dex, and a density of 1.27g / cm 3 Microfiber-generated fibers. The fibers were crimped, cut into 51 mm, and carded to form a staple fiber web.

[0066] Then implement 84dtex / 36f false twist processing, carry out additional twist processing of 600T / m on the obtained polyester yarn, and then weave at a loom density of 82 × 76 threads / inch to obtain a weight per unit area of ​​55g / m 2 plain weave fabric.

[0067] Laminate the above net with plain weave, and then use ...

Embodiment 2

[0073] Infrared rays were irradiated at 97V for 90 seconds, and the water content after 90 seconds of irradiation was 20%, and the same operation as in Example 1 was performed. The high-molecular elastomer penetrated into the ultrafine fiber bundle at 2% by area ratio. As a result, there was no breakage, wrinkle, etc., and the hand feeling was soft and very good, and the hair length was uniform, and a suede artificial leather with a good appearance was obtained. The chair cushion prepared by using the suede-like artificial leather has less fluff and shedding.

Embodiment 3

[0075] The same operation as in Example 1 was performed except that the surface temperature of the fiber entangled body was raised to 90° C. within 1 minute by irradiating infrared rays at 80 V for 60 seconds. The high-molecular elastomer penetrated into the microfiber bundle at an area ratio of 3.5%. The obtained artificial leather was free from breakage, wrinkles, etc., and had a soft and very good touch, and the fibers were held firmly. The suede artificial leather obtained from this artificial leather has regular hair and a good appearance. The chair cushion prepared by using the suede-like artificial leather has less fluff and shedding.

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Abstract

An artificial leather includes an entangled body made of bundles of microfine fibers and an elastic polymer impregnated into the entangled body. A part of the elastic polymer penetrates into the bundles of microfine fibers. The degree of penetration of the elastic polymer is from 1 to 30% by area when measured on a cross section which is taken along a direction perpendicular to a lengthwise direction of the bundles of microfine fibers. The fiber-holding property is improved by the elastic polymer which partly penetrates into the bundles of microfine fibers, and therefore, the artificial leather has good hand without deteriorating the surface quality.

Description

technical field [0001] The present invention relates to artificial leather and its preparation method. Background technique [0002] Conventionally, it has been widely known to impregnate sheet-like materials such as fiber entanglements such as non-woven fabrics and braids, and various processed products thereof, with solutions or dispersions of polymeric elastomers represented by polyurethane, etc., to prepare products with excellent functionality. The leather sheet can be implemented industrially. [0003] For example, a soft leather-like sheet can be obtained by impregnating polyurethane into a fibrous substrate containing sea-island-structured microfiber-generated fibers, solidifying the polyurethane, and extracting and removing the sea component from microfiber-generated fibers. material (for example, refer to Patent Document 1). It is also disclosed that by using a mixed spinning fiber containing a sea component polymer having good solvent extractability, ultrafine f...

Claims

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Application Information

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IPC IPC(8): D06N3/00
Inventor 目黑将司吉田康弘米田久夫
Owner KURARAY CO LTD
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