| 摘要 |
A composite film is provided by providing a polypropylene or other base resin layer, laminating a first covering layer of a resin composition (1) comprising the following components (A), (B), (C) and (D) to one side of the base resin layer and a second covering layer of a resin composition (2) comprising the components (A) and (D) to the other side of the base resin layer, which composite film is optionally stretched. The resin composition (2) may contain component (C).(A) a heat-sealable olefinic polymer (e.g. a propylene series copolymer such as propylene-ethylene copolymer, propylene-butene-1 copolymer or propylene-ethylene-butene-1 copolymer) (B) a diorganopolysiloxane (e.g. dimetylpolysiloxane) (C) a fine-powdered heat-resistant resin (e.g. microspheres of a thermosetting resin) (D) a higher fatty acid amide This composite film is excellent in slidability, antistaticity, releasability and clarity and compatible with a high-speed automatic overwrap packaging machine.
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