Industrial stretch films

Details Industrial stretch films Industrial stretch films

1996-01-16

1998-05-26

Buffalow, E. Rollins

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

428515, 428910, B32B 2708

Patent

active

057562199

ABSTRACT:
The invention provides a stretch wrapping film (i.e., non-heat shrinkable) having (i) skin layers and (ii) at least one core layer which includes at least 25% by weight, more preferably from about 60% to about 90% by weight (of the layer composition) of a propylene polymer, preferably a propylene homopolymer; for the film as a whole, the propylene content ranges from about 10% to about 65% by weight (of the film). In more preferred embodiments, the films include skin layers, intermediate layers, and a core layer. At least one of the intermediate and core layers contains the propylene polymer, which is preferably a homopolymer or a blend of homopolymer with linear low density polyethylene (LLDPE); the skin layers comprise an ethylene polymer, preferably a tacky LLDPE composition. These films have improved strength and tear and puncture resistance, and are especially suited for industrial wrapping of loaded pallets and other large objects such as furniture. These films are especially advantageous in providing a high holding force.

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