| 摘要 |
PROBLEM TO BE SOLVED: To provide a composite film for a package containing at least a substrate layer (A) and a sealant layer (B) which is constituted by a relatively small number of essential components, and capable of exhibiting easy-peeling function even when a surface of a material to be coated (opposite material) is polyethylene or polypropylene.SOLUTION: A composite film for a package contains at least a substrate layer (A) and a sealant layer (B), and the sealant layer (B) is constituted by a resin composition (I) containing 20 to 80 mass% of polystyrene (b1) and 20 to 80 mass% of a polystyrene based elastomer (b2), where a total amount of (b1) and (b2) is 100 mass%, or a resin composition (II) containing 100 pts.wt. of the resin composition and 1 to 30 pts.wt. of a polyolefin-based resin, and a surface of a material to be coated is the polyolefin-based resin. |
