Multi-layer film or sheet material

Details Multi-layer film or sheet material Multi-layer film or sheet material

1984-10-09

1986-11-18

Buffalow, Edith

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428349, 428516, B32B 2700

Patent

active

046235876

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.

REFERENCES:
patent: 4363841 (1982-12-01), Snow
patent: 4456660 (1984-06-01), Colombo
patent: 4505969 (1985-03-01), Weiner

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