Olefin polymer blends and films therefrom

Details Olefin polymer blends and films therefrom Olefin polymer blends and films therefrom

1978-01-17

1980-02-12

Seccuro, Carman J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

264515, 428516, 428517, 525240, C08L 2316

Patent

active

041883500

ABSTRACT:
A heat-shrinkable multilayer film suitable for use in the packaging of a frozen poultry, includes a first outer layer comprising a blend of a propylene-ethylene copolymer having a high isotactic molecular structure with less than about 6% by weight ethylene and having a melt flow of from about 1.5 to about 18 decigrams per minute; a (butene-1)-ethylene copolymer having a high isotactic molecular structure with less than about 10% by weight being ethylene and having a melt flow of from about 0.1 to about 5.0 decigrams per minute, and a thermoplastic elastomer selected from the group consisting of ethylene-propylene copolymers and ethylene-propylene diene terpolymers, the ratio by weight of the propylene-ethylene copolymer to the (butene-1)-ethylene copolymer being from about 2:1 to about 1:2 and the thermoplastic elastomer being present from about 10% to about 50% by weight; at least one core layer capable of being biaxially oriented and heat shrinkable and comprising an extrudable adhesive; and a second outer layer comprising a polymer selected from the group consisting of ethylene homopolymers and copolymers each having a highly branched molecular structure; the multilayer film being biaxially oriented.

REFERENCES:
patent: T955009 (1977-02-01), Lansbury et al.
patent: 3832270 (1974-08-01), Schirmer
patent: 3849520 (1974-11-01), Bullard et al.
patent: 3900534 (1975-08-01), Schard
patent: 4078020 (1978-03-01), Rose et al.

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