Multi-layer film or sheet material

Abstract

The invention provides a multi-layer film or sheet material of thermoplastic resins having a high adhesive bonding strength between layers as well as excellent heat-sealability. The multi-layer film or sheet material comprises a layer A formed of a resin composition composed of a polypropylene-based resin and a linear low-density ethylene .alpha.-olefin copolymer having specified density and a layer B formed of a polypropylene-based resin or a layer formed of a resin composition of a polypropylene-based resin and a low-crystallinity .alpha.-olefin copolymer. The invention also provides a laminated film or sheet material comprising a base material, e.g. plastic film, paper, aluminum foil, etc., and the above defined multi-layer film or sheet material bonded together through an intermediate layer of an adhesive in such a manner that the layer A in the multi-layer film or sheet material faces the base material.

Dependencies are inferred from the claim text.