LEATHER-LIKE SHEET MATERIAL, PROCESS FOR PRODUCING LEATHER-LIKE SHEET MATERIAL, AND BALL USING THE SAME

摘要

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.