Compositions of ethylene polymers for the manufacture of films

Details Compositions of ethylene polymers for the manufacture of films Compositions of ethylene polymers for the manufacture of films

1983-06-03

1986-11-18

Seccuro, Carman J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Physical dimension specified

525240, 525227, 525185, 525207, C08L 2306, C08L 2308, C08L 2320

Patent

active

046235817

ABSTRACT:
A composition comprising from 2 to 25 weight percent of at least one free radical ethylene polymer with a specific gravity between 0.91 and 0.94, and from 75 to 98 weight percent of at least one copolymer of ethylene and at least one .alpha.-olefin containing at least 4 carbon atoms, with a specific gravity between 0.905 and 0.940 and a melt index between 0.4 and 3 dg/minute, wherein the average proportion of .alpha.-olefin units in the copolymer is between 1 and 8 mole percent, wherein the copolymer comprises crystalline fractions and amorphous fractions, wherein the distribution of the .alpha.-olefin units in the copolymer is heterogeneous, and wherein the proportion of .alpha.-olefin units in the copolymer varies between at least 0.2 and at most 5 times the average proportion, depending on the fractions considered. Application to the manufacture of films with a thickness of between 5 and 200 microns.

REFERENCES:
patent: 3682767 (1972-08-01), Britton et al.
patent: 4243619 (1981-01-01), Fraser et al.
patent: 4339507 (1982-07-01), Kurtz et al.
patent: 4425268 (1984-01-01), Cooper
patent: 4429079 (1984-01-01), Shibata et al.

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