Process for extrusion

Details Process for extrusion Process for extrusion

1987-12-22

1989-03-21

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

264230, 264342R, 525240, 5263481, 5263482, B29C 6102

Patent

active

048141356

ABSTRACT:
A process for extrusion comprising extruding, under conditions which will provide a shrink film, a linear low density copolymer of ethylene and at least one alpha-olefin having 3 to 6 carbon atoms, said copolymer having (i) a density in the range of about 0.915 to about 0.932 grams per cubic centimeter; (ii) a weight average molecular weight of at least about 250,000, (iii) a ratio of weight average molecular weight to number average molecular weight of at least about 6; and (iv) a copolymer species with a molecular weight of at least about 500,000 in an amount of at least about 8 percent by weight based on the weight of the copolymer.

REFERENCES:
patent: 4277594 (1981-07-01), Matthews et al.
patent: 4354997 (1982-10-01), Mizutani et al.
patent: 4540538 (1985-09-01), Corwin et al.
patent: 4594213 (1986-06-01), Ealer
patent: 4652490 (1987-03-01), Arita et al.

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