Multilayer coextruded linear low density polyethylene stretch wr

Details Multilayer coextruded linear low density polyethylene stretch wr Multilayer coextruded linear low density polyethylene stretch wr

1992-12-28

1994-08-02

Buffalow, Edith

Stock material or miscellaneous articles

Hollow or container type article

Shrinkable or shrunk

428218, 428349, 428516, 428523, 15624411, B65D 6502

Patent

active

053344286

ABSTRACT:
The present invention relates to multilayer coextruded thermoplastic stretch wrap films useful for the packaging or palletizing of goods. More particularly the films of this invention comprise at least three layers having two outer layers and at least one intermediate layer placed between the outer layers. The intermediate layer includes a low melt index linear low density copolymer of ethylene and a minor amount of at least one alpha olefin having from 4 to 10 carbon atoms, the low melt index linear low density copolymer having a melt index of between about 0.5 to about 2.5. At least one of the two outer layers includes a high melt index linear low density copolymer of ethylene and a minor amount of at least one alpha olefin having from 4 to 10 carbon atoms, the high melt index linear low density copolymer having a melt index of greater than about 2.5, the high melt index linear low density copolymer containing from about 3.5 to about 15 weight percent n-hexane extractibles. The n-hexane extractibles are present in an amount sufficient to cause the stretch wrap film to exert a cling force to itself or other surfaces when used in the stretch overwrap packaging of articles.

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