FIELD: process engineering.
SUBSTANCE: invention relates to light material, particularly to films with textile properties. It if made from thermoplastic polymer. It is processed to form linear areas A interconnected by linear crosspieces B. Note here that every area A and crosspiece B are oriented. Note here that prevailing direction of orientation in areas A forms angle v relative to direction wherein A extend. Note also that crosspieces B comprises multiple straight grooves of finer material or slits making angle u larger than v relative to direction in which A pass. Proposed method comprises passage of oriented film through two engage rifled rolls for cold stretching of the film in direction at the angle relative to prevailing initial orientation. Note also that, at least, one of said rifled rolls has sharp-edge flanges to separate areas A from crosspieces B and to stretch the material for making crosspieces B. at the same time material stretching to form areas A is smaller or is not made at all. Preferably, one of said rifled rolls has ledges with wavy surface.
EFFECT: film with textile properties.
18 dwg, 3 ex
