THIN FILMS AND LAMINATED PRODUCTS MADE FROM FILM AND NONWOVEN MATERIALS Russian patent published in 2000 - IPC

FIELD: manufacture of films and laminated products. SUBSTANCE: multilayer film contains core layer manufactured from extruded thermoplastic polymer and having first outer surface and second outer surface. Core layer has filler and plurality of pores extending adjacent to filler, and first surface layer attached to first outer surface of core layer so as to define multilayer film of total thickness. Thickness of first surface layer is less than 10% of total thickness of multilayer film and does not exceed 30 microns. Multilayer film makes barrier for liquid and has water vapor transmission coefficient of at least 300 g/sq m/day. Laminated products manufactured from multilayer films and nonwoven materials are described in Specification. EFFECT: increased efficiency in manufacturing thin films possessing specific properties. 22 cl, 4 dwg, 5 ex