PROCESS FOR THE MANUFACTURE OF ANTISTATIC AND BIAXIALLY NTED POLYPROPYLENE FILM

摘要

An antistatic and biaxially oriented polypropylene film is manufactured by the steps of (1) adding to crystalline polypropylene, (a) an antistatic agent and (b) a zinc salt of aliphatic acid, (2) melt-extruding the resulting composition to form a sheet or film, (3) orienting the sheet or film both longitudinally and laterally at a temperature below its melting point, and then (4) activating the surface of the resultant antistatic and biaxially oriented film. The film thus obtained possesses a remarkably improved antistatic property and adhesiveness to ink printed on it and to resins coated on it.