PROCESS FOR PREPARING MICRO-POROUS POLYURETHANE RESIN SHEETS BY CASTING THE RESIN ON A POROUS SINTERED THERMOPLASTIC POLYMERIC RESIN SUPPORT SURFACE

摘要

In a method of making artificial leathers and other water vapor permeable flexible sheet materials, a layer of polymer-containing mixture adhering to a temporary support is coagulated by suitable liquid treatment, dried, and then stripped from the support.