SELF-ADHESIVE WRAPPING FILM

摘要

PROBLEM TO BE SOLVED: To prepare a self-adhesive wrapping film which is excellent in stickiness, adaptability to a microwave oven, and serration cuttability and has a moderate flexibility. SOLUTION: This film is formed from a propylene block copolymer which is produced by a process comprising the first step wherein propylene-ethylene copolymer blocks (A) contg. 1.5-6.0wt.% ethylene-derived repeating units are formed in an amt. of 40-85wt.% of the block copolymer and the second step wherein propylene-ethylene copolymer blocks (B) contg. 7-17wt.% ethylene- derived repeating units are formed in an amt. of 15-60wt.% of the block copolymer and in which the intrinsic viscosity [η] B of blocks B is 2-5dl/g and the ratio [η]B/[η]A of the intrinsic viscosity [η]B of blocks B to that [η]A of blocks A is 0.5-1.8. The film is stretched in the machine direction.