Leather-like sheet, method for producing leather-like sheet...

D - Textiles – Paper – 06 – N

Patent

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Details

D06N 3/00 (2006.01) A63B 37/00 (2006.01) D06N 3/14 (2006.01)

Patent

CA 2579103

A sheet material having protrusions on its surface is provided. The sheet material includes a substrate layer formed of extrafine fibers and a polymeric elastomer (A). A composite layer formed of fuffed extrafine fibers continued from the fibers constituting the substrate layer and an polymeric elastomer (B) bonded to the extrafine fibers is provided on one surface of the substrate layer. Further, a covering layer composed mainly of a polymeric elastomer (C) is provided on the top of protrusions on the surface of the sheet material, and a through-hole extended from the surface side to the substrate layer is provided on the side part between the top of the protrusions and the valley bottom part of the protrusions. Further, preferably, the covering layer has a multilayer structure of two or more layers, and the surface side layer in the covering layer contains a pressure-sensitive adhesive. Preferably, the pressure-sensitive adhesive is a liquid rubber or a rosin resin, and the liquid rubber is a synthetic liquid rubber having a molecular weight of 800 to 5000.

L'invention concerne un matériau en feuille présentant des saillies sur sa surface. Le matériau en feuille comprend : une couche de substrat formée de fibres extrafines et d'un élastomère polymère (A); une couche composite formée de fibres extrafines gonflées, prolongeant les fibres constituant la couche de substrat, et d'un élastomère polymère (B) lié aux fibres extrafines, ladite couche composite étant prévue sur une surface de la couche de substrat; une couche de protection composée principalement d'un élastomère polymère (C) prévue par dessus les saillies sur la surface du matériau en feuille; et un trou de passage allant du côté de la surface à la couche de substrat, prévu sur la partie latérale entre la partie supérieure des saillies et la partie inférieure des saillies. De plus, la couche de protection a de préférence une structure multicouche, constituée de deux couches ou plus, et la couche du côté de la surface de la couche de protection contient un adhésif sensible à la pression. De préférence, l'adhésif sensible à la pression est un caoutchouc liquide ou une résine de colophane, et le caoutchouc liquide est un caoutchouc liquide de synthèse ayant un poids moléculaire allant de 800 à 5 000.

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