Modified polyolefin film with stable twist retention, dead fold

Details Modified polyolefin film with stable twist retention, dead fold Modified polyolefin film with stable twist retention, dead fold

1990-08-01

1992-07-07

Buffalow, Edith L.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428332, 428500, 428516, 229 8701, 525240, B29D 2200

Patent

active

051281830

ABSTRACT:
The present invention is directed to modified polyolefin films with stable twist retention and dead fold properties to be employed in wrapping in general, and particularly in wrapping small items. The films produced by the present invention exhibit improved moisture vapor barrier and oxygen barrier properties. The inventive films are obtained by extrusion and stretching of a ternary mixture comprising (1) isotactic polypropylene; (2) high density polyethylene; and (3) a glassy amorphous low molecular weight resin. Multilayer films are also provided.

REFERENCES:
patent: 2956042 (1960-10-01), Underwood et al.
patent: 3036987 (1962-05-01), Ranalli
patent: 3663488 (1972-05-01), Kail et al.
patent: 4786533 (1988-11-01), Crass et al.
patent: 4842187 (1989-06-01), Janooha et al.
Courtaulds Films, "Shorko Films SHX Transparent Coextruded OPP Films for Twistwrapping".

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