Patent ID: 7754292
Filing Date: 2010-07-13
Classification: B32B,D06N,Y10T

Abstract:
1. A process for the preparation of a multilayer intermediate product impregnated with polyurethane, the process being useful for preparing a soft synthetic leather and comprising: a. producing a microfibrous non-woven intermediate product comprising microfibers of one or more polymers selected from the group consisting of polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polyacrylonitrile, and polyamide; b. producing an intermediate multilayer product by adhesive coupling, the intermediate multilayer product comprising at least one layer of the non-woven microfibrous intermediate product and at least one layer of a reinforcing textile product, wherein the layers in the intermediate multilayer product are bonded by adhesive; and c. impregnating the multilayer intermediate product with one or more polyurethane solutions, causing the multilayer intermediate product to be impregnated with polyurethane.