| 摘要 |
<p>An artificial leather composed of a sheetlike fiber assembly base, a porous polyurethane layer having interconnected micropores and formed on at least one side of the base, and a nonporous polyurethane coating formed on the porous layer. The porous poluyrethane layer has numerous open pores scattered therein, part of the pores being blocked by the nonporous coating while the rest being left unblocked, and at least 70 % of the unblocked pores have diameters of 1-25 νm. This leather is produced by tightly adhering the porous polyurethane layer to the fiber assembly base, coating the polyurethane layer with a mixture of a polyurethane and a solvent so as to form numerous scattered spots to thereby generate numerous open pores on the surface of the polyurethane layer, and further coating the surface thus treated with a nonporous polyurethane.</p> |
