Process for the production of microfibrous suede-finish non-woven fabric without using organic solvents

摘要

Process for the preparation of microfibrous non-woven fabric of the suede-finish type comprising the following stages: a) spinning of a bi-component fiber of the " islands in the sea " type in which the island " is constituted by a polymer chosen from among those employed in textile applications while the "sea" is a polymer that can dissolve and be removed by means of treatment with water, alkaline or acidic aqueous solutions, with non-polluting organic solvents alone or in aqueous solution; b) preparation of a felt with the bi-component fiber by means of drawing; c) impregnation of the felt with aqueous solution of polyvinylalcohol with reduced solubility in water; d) removal of the "sea" component by means of treatments with solvents defined in a); e) impregnation with emulsion or polyurethane dispersion; f) removal of the polyvinylalcohol; g) finishing treatment of non-woven fabric obtained.