HEAT-FUSABLE MULTILAYER FILM

PROBLEM TO BE SOLVED: To provide a heat-fusible multilayer film which keeps heat sealing part excellent in unsealability at room temperature and has a proper heat seal strength when opened at a high temperature and is in a stable peeling state when opened. SOLUTION: In the heat-fusible multilayer film, a cohesion destruction layer (1) comprising 10-50 wt.% of a propylene-α-olefin random copolymer (A) of 120-150°C melting point, 10-40 wt.% of a polar group-containing polymer (B), and 20-60 wt.% of an ethylene polymer (C) [wt.% of (A)+(B)+(C)=100 wt.%] and a polyolefin heat sealing layer (2) overlie one side, and a lamination layer (3) made of an ethylene polymer or a propylene polymer overlies the other side. COPYRIGHT: (C)2009,JPO&INPIT