POLYPROPYLENE-BASED BIAXIALLY ORIENTED FILM

摘要

PROBLEM TO BE SOLVED: To obtain an economically advantageous polypropylene-based biaxially oriented film excellent in straight cutting properties in the machine direction(MD) and strength and transparency in the transverse direction(TD). SOLUTION: This polypropylene-based biaxially oriented film is obtained by biaxially orienting a film molding material comprising a polyprolylene-based resin material, composed of 40-88wt.% crystalline polypropylene and 60-12wt.% propylene-α-olefin copolymer and containing the copolymer as particles in the crystalline polypropylene. The average dispersed particle diameter in the TD direction of the copolymer particles in the biaxially oriented film is >=0.1μm.