| 摘要 |
PROBLEM TO BE SOLVED: To provide an easily tearable sealant film which has an appropriate peeling strength to a container composed of polypropylene in the adhered surface, no stringiness in the peeling surface and displays good tearability, in the field of containers torn by peeling the heat sealed portion of a sealed container. SOLUTION: The easily tearable sealant film 100 is composed of a resin layer (A) the surface of which is heat sealed to the adhered member and a resin layer (B) laminated adjacent thereto. For the layer (A), a mixed resin prepared by mixing a high-pressure LDPE or an ethylenic copolymer at a ratio of 20 to 90 pct.wt. to 100 pct.wt. of polybutene-1 is employed. For the layer (B), an ethylene/α-olefin copolymer polymerized using a single site catalyst is employed to form both layers by the coextrusion inflated molding to compose the sealant film. A base material is bonded to the resin layer (B) surface of the sealant film 100 to produce a packaging material 200. COPYRIGHT: (C)2004,JPO
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