Air-permeable sheet structural material, leather-like structural material and method of producing the same

摘要

A sheet structural material (3) has a supporting fabric layer (1) and a porous layer (2) having 20 to 250 mu m diameter open cells formed by applying and drying a foamed material containing at least a base resin and a filler. A leather-like sheet material (10) is obtained by pressing onto the porous layer the concavo-convex surface of a transfer paper (9) to which a film material (15) has been applied to occupy concave portions (14) of like surface, thereby to emboss the porous layer and transfer the film material as a layer (5) onto the convex portions. The resulting leather-like sheet material has an air permeability of 3 to 13 cm<3>/cm<2>/sec.