Polyethylene films exhibiting low blocking force

Details Polyethylene films exhibiting low blocking force Polyethylene films exhibiting low blocking force

1993-07-15

1994-12-06

Seccuro, Jr., Carman J.

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

525240, 525 53, 428 352, 428 355, C08L 2308, C08L 2318, B32B 2732

Patent

active

053709403

ABSTRACT:
Film having good blocking properties and low coefficient of friction is prepared without the presence of antiblock additives from certain thermoplastic ethylene interpolymer products. The thermoplastic ethylene interpolymer products have a density of about 0,935 g/ml or less, a melt flow ratio, I.sub.10/ I.sub.2, of at least about 8, and at least about 0.5 percent by weight of the interpolymer product has a weight average molecular weight of at least about 1,000,000 grams/mole. The interpolymer products are a blend or composite of ethylene polymers or copolymers and comprise at least a first interpolymer of ethylene with at least one alpha-olefin monomer. Preferably, the interpolymer products have a melt index, I.sub.2, of from about 0.1 to about 4 grams/10 minutes. The interpolymer products can be made using discrete polymer blends, or preferably, in a multiple reactor sequence. Blown film made from the interpolymer products is especially useful in grocery sack applications.

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