Ethylene-alpha-olefin copolymer and films obtained therefrom

Details Ethylene-alpha-olefin copolymer and films obtained therefrom Ethylene-alpha-olefin copolymer and films obtained therefrom

1989-07-11

1991-01-01

Teskin, Fred

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

428500, 525240, 526143, 5263483, 5263485, 5263486, 5263522, B32B 2732, C08L 2308, C08F21002

Patent

active

049817604

ABSTRACT:
An ethylene-.alpha.-olefin copolymer comprising ethylene and an .alpha.-olefin having from 3 to 10 carbon atoms, the copolymer having an .alpha.-olefin content of from 1.0 to 8.0 mol %, a density of from 0.900 to 0.930 g/cm.sup.3, and a melt flow rate of from 0.1 to 100 g/10 min., the programed-temperature thermogram of said copolymer as determined with a differential scanning calorimeter after being completely melted and then gradually cooled showing an endothermic peak (a) in a range of from 75.degree. to 100.degree. C. and an endothermic peak (b) in a range of from 120.degree. to 140.degree. C., with the ratio of an endotherm at the endothermic peak (b), .DELTA.Hb, to an endotherm at the endothermic peak (a), .DELTA.Ha, i.e., .DELTA.Hb/.DELTA.Ha, being from 0.03 to 2.0. The copolymer provides a film exhibiting excellent physical properties required for packaging film.

REFERENCES:
patent: 4438238 (1984-03-01), Fukushima et al.

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