METHOD FOR PRODUCING DOUBLED MATERIAL Russian patent published in 2000 - IPC

FIELD: sewing and shoe industry. SUBSTANCE: method involves producing layered materials composed of nonwoven fabrics and polymeric films by preliminary forming of fabrics from mixtures containing 10-100% by weight of thermoplastic filament with melting temperature making 0.75-1.6 of melting temperature of inner layer of thermoplastic polymer and thermoplastic films in the form of webs of unlimited length; assembling multilayer packet having at least one outer layer of nonwoven fibrous material and inner layer of thermoplastic polymer; stitching multilayer packet with needles by means of stitching equipment; providing thermal treatment of multilayer packet at temperature making 1.0-1.7 of melting temperature of thermoplastic polymer film. EFFECT: simplified method, increased ecological safety of production process and improved quality of multilayer material. 7 cl, 1 tbl, 7 ex