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Stretchable leather-like sheet substrate and process for producing same

A sheet and leather technology, applied in the manufacture of rayon, non-woven fabrics, household appliances, etc., can solve the problems of fiber sticking, hindering the elasticity of polyurethane, and insufficient effect.

Inactive Publication Date: 2010-10-06
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The larger the particle size of colloidal silica, the more it falls off from the fibers, and as a result, problems such as fiber sticking occur, and the effect is not sufficient
In addition, the method of mixing other components into polyurethane cannot satisfy all the performances of appearance, elasticity, fullness, and drape because it hinders the elasticity of polyurethane itself.

Method used

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  • Stretchable leather-like sheet substrate and process for producing same
  • Stretchable leather-like sheet substrate and process for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] The short fibers obtained in spinning example 1 and spinning example 5 are mixed with a mass ratio of 50 / 50 by a fiber blending machine, and then formed into 260 g / m by cross-overlapping. 2 cotton net. Then, the two sides are combined, about 2500 stitches / cm 2 Acupuncture in bundles. Subsequently, it was shrunk in hot water at 90°C, then heated and dried at 130°C, and squeezed directly with rolls to produce a complex non-woven fabric with a smooth surface. The weight per unit area of ​​the complex non-woven fabric is 535g / m 2 , the apparent specific gravity is 0.48g / cm 3 . A polymeric elastomer obtained by impregnating polyurethane emulsion (Bondik NSA: manufactured by Dainippon Ink Chemical Industry Co., Ltd.), drying and coagulating the complexed nonwoven fabric, and then extracting and removing polyethylene in a hot toluene solution. The mass ratio of fiber / fiber is 10 / 90, and the weight per unit area is 498g / m 2 , the apparent specific gravity is 0.45g / cm 3 ,...

Embodiment 2

[0100] An entangled nonwoven fabric was obtained in the same manner as in Example 1 except that the short fibers obtained in Spinning Example 2 and Spinning Example 5 were used. The weight per unit area of ​​complex non-woven fabric is 550g / m 2 , the apparent specific gravity is 0.46g / cm 3 . This entangled non-woven fabric is processed in the same manner as in Example 1, and the mass ratio that obtains polymer elastomer / fiber is 10 / 90, and the weight per unit area is 504g / m 2 , the apparent specific gravity is 0.46g / cm 3 , a leather-like sheet substrate with a thickness of 1.1 mm. In the ultrafine fiber bundle of the ultrafine fiber as-spun fiber in spinning example 2, it can be observed that there are powdery substances in some places between the ultrafine fibers, which hinders the generation of glue, and the part where there is no powdery substance produces ultrafine fibers. The parts between each other are glued, so that the leather-like sheet matrix has sufficient mech...

Embodiment 3

[0108] The sheet-like substrate obtained in Example 1 was cut parallel to the surface to obtain a thin body of a leather-like sheet with a thickness of 0.5 mm. The surface opposite to the cut surface was polished and fluffed with 400-grit sandpaper, and then dyed under the following dyeing conditions to obtain a leather-like appearance with a high texture and dense appearance without the adhesion of polyurethane microfibers that make up the fluff on the surface. The sheet material has good stretchability and drapability in both vertical and horizontal directions.

[0109] staining conditions

[0110] Dyeing: rope dyeing machine 90°C×40 minutes

[0111] Dye: Iralan Brown 2GL (Chibagaigi-manufactured) 1% owf

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Abstract

This leather-like sheet base material is formed out of an entangled nonwoven fabric formed by blending ultrafine fiber bundles (A) and ultrafine fiber bundles (B) in such a mass ratio as to satisfy: (A) / (B)=30 / 70 to 70 / 30, and further out of a polymeric elastic material enclosed in the nonwoven fabric, wherein the ultrafine fiber bundles (A) are each formed by gathering 10-100 threads of ultrafine fibers comprising an elastic polymer with a JIS-A hardness of 90-97 and having an average single fiber fineness of <=0.5 dtex and the ultrafine fiber bundles (B) are each formed out of an ultrafine fiber having an average single fiber fineness of <=0.5 dtex and comprising a non-elastic polymer.

Description

technical field [0001] The present invention relates to a leather-like sheet substrate having excellent stretchability. In more detail, the present invention relates to a leather-like sheet substrate that has stretchability, softness, and drapability without substantial structural deformation even after repeated elongation and deformation, and has a sense of fullness. Background technique [0002] In the past, artificial leather has been used in various applications such as clothing, interior decoration, shoes, bags, and gloves. Especially in the case of clothing, such as clothing, shoes, gloves, etc., a comfortable feeling is required. Therefore, there is a strong demand for stretchability and drapability of artificial leather materials. However, since the conventional artificial leather is composed of a network structure of microfiber non-woven fabric and wet-impregnated resin inside, there will be conflicting performances such as leather-specific fullness, stretchabilit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/46D01F8/04D01F1/02D01D5/30D06N7/06D04H1/06D06N3/00
CPCD06N3/0004D06N3/0025D04H1/465D04H1/06Y10S428/904D06N3/0031D04H1/49Y10T442/2369Y10T442/64Y10T442/674Y10T442/699Y10T442/614Y10T442/615Y10T442/637C11C5/004C11C5/006
Inventor 延藤芳树丹波善博
Owner KURARAY CO LTD
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