Patent ID: 8293375

Claim:
A heat sealable multilayer film comprising a cohesive failure heat seal layer (1) that comprises a resin composition including 75 to 85 wt % of a propylene polymer (A) and 15 to 25 wt % of an ethylene polymer (B) selected from a high-pressure low-density polyethylene (E) which has MFR (JIS K 7210, 190° C.) of not more than 9 (based on the total of (A) and (B) of 100 wt %), and a support layer (2) comprising a propylene block copolymer (C), wherein the propylene block copolymer (C) for the support layer (2) has a melting point higher than that of the propylene polymer (A) for the cohesive failure heat seal layer (1).