Laminate film for stretch-wrapping and process for producing the

Details Laminate film for stretch-wrapping and process for producing the Laminate film for stretch-wrapping and process for producing the

1992-02-05

1994-03-22

Robinson, Ellis P.

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

428517, 428518, 428520, B32B 2728, B32B 2732

Patent

active

052963047

ABSTRACT:
A laminate film for stretch-wrapping is disclosed, comprising an intermediate layer containing from 50 to 95% by weight of an ethylene-.alpha.-olefin copolymer, a propylene-ethylene-.alpha.-olefin random copolymer, a propylene-.alpha.-olefin random copolymer, a butene-1 homopolymer, or a butene-1-ethylene copolymer and from 5 to 50% by weight of a hydrogenated block copolymer elastomer having laminated on both sides thereof a surface layer comprising from 75 to 95% by weight of ethylene and from 5 to 25% by weight of vinyl acetate. The film is excellent in stretchability, softness, tear strength, and in particular deformation recovery properties.

REFERENCES:
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patent: 3465063 (1969-09-01), Hassell et al.
patent: 3741253 (1973-06-01), Brax et al.
patent: 3882259 (1975-05-01), Nohara et al.
patent: 4207363 (1980-06-01), Lustig et al.
patent: 4619859 (1986-10-01), Yoshimura et al.
patent: 4713282 (1987-12-01), Yazaki et al.
patent: 4897274 (1990-01-01), Candida et al.
Database WPIL, Derwent Publications, Ltd., AN 87-104693 & JP-A-62 51 440, Mar. 6, 1987, "Stretch **Wrap** Film for Food Etc.-Comprises **Hydrogenated** Block **Copolymer** Layer with **Ethylene**-Vinyl-Acetate Copolymer Resin Layers on Both Sides".

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