Patent ID: 6921508
Filing Date: 2005-07-26
Classification: D06N,Y10T

Abstract:
1. A method for the preparation of microfibrous non-woven fabric of the suede-finish type comprising the following steps: a) spinning of a bi-component fiber of the “islands in the sea” type in which the “island” comprises a polymer chosen from among those employed in textile applications while the “sea” is a polymer that can be dissolved and removed; b) preparing a felt with the bi-component fiber; c) impregnating the felt with aqueous solution of polyvinylalcohol with reduced or reducible solubility in water, wherein the solubility of the polyvinylalcohol is reduced by successive hot impregnation treatments; d) removing the “sea” component by treatment with water, alkaline or acidic aqueous solutions, with non-polluting organic solvents either alone or in an aqueous solution; e) impregnating with polyurethane emulsion or dispersion; f) removing the polyvinylalcohol; and g) finishing the non-woven fabric with water, alkaline or acidic aqueous solutions, with non-polluting organic solvents either alone or in an aqueous solution.