METHOD FOR PRODUCING A FILM MATERIAL AND A NONWOVEN MATERIAL OBTAINED BY SAID METHOD

摘要

The invention relates to a method for producing a film material from a monoaxially drawn film that can be fibrillated, said film being mechanically split by means of a pin roller to form a continuous film filament structure, which is laid onto a backing and is bonded by a stitching method to form a compact structure. According to the invention, the film filament fibrils of the split film are then subjected to hydrodynamic needling in order to split the fibres further, achieving a fine fibrillation and an interweaving of said fibres, thus bonding the film filament fibrils into a nonwoven material with a tightly packed surface. The fibrillation of the film can be continued using a pin roller and/or water jets.