Polypropylene multi-layer film

Abstract

A polypropylene multi-layer film which comprises a crystalline polypropylene substrate layer having laminated to at least one side thereof a sheet of a resin composition comprising: (A) 10-90% by weight of a propylene random copolymer satisfying that (i) the comonomer content is 4-15% by weight, (ii) the Vicat softening point is 122.degree. C. or less, and (iii) the cold xylene-soluble portion content is 15% by weight or less, (B) 10-90% by weight of a copolymer of propylene and an .alpha.-olefin having four or more carbon atoms or a copolymer of propylene, an .alpha.-olefin having four or more carbon atoms and ethylene satisfying that: (i) the content of the .alpha.-olefin having four or more carbon atoms is 8-35 mole %, (ii) the ethylene content is 5 mole % or less, (iii) the cold xylene-soluble portion content is 15-70% by weight, and (iv) the .DELTA.haze is 5% or less, and (C) 0-15% by weight of a highly crystalline polypropylene having a melting point of 150.degree. C. or more. This polypropylene multi-layer film has an excellent, low-temperature heat sealing property, a good transparency, a good scratch resistance, and so on.

Dependencies are inferred from the claim text.