Sealable polyolefin films containing very low density ethylene c

Details Sealable polyolefin films containing very low density ethylene c Sealable polyolefin films containing very low density ethylene c

1991-12-19

1993-04-27

Buffalow, Edith

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428349, 428516, 428500, 525240, B32B 702

Patent

active

052060756

ABSTRACT:
The invention provides laminar polyolefin film materials having a base film layer comprising a blend of an olefin polymer and up to about 30% by weight of at least one very low density copolymer of ethylene and a C.sub.3 to C.sub.20 alpha olefin comonomer copolymerizable with ethylene, said base layer having a heat sealable film layer present on one or both surfaces thereof comprising a very low density copolymer of ethylene and a copolymerizable C.sub.5 to C.sub.12 alpha olefin comonomer. The ethylene copolymer constituents of the film are characterized as having a density in the range of about 0.88 g/cm.sup.3 to abut 0.915 g/cm.sup.3, a melt index in the range of about 0.5 dg/min to about 7.5 dg/min, a molecular weight distribution (M.sub.w /M.sub.n) of about 1.5 to about 3.5 and an essentially single melting point in the range of about 60.degree. C. to about 115.degree. C., measured as a DSC peak T.sub.m.
Films of this invention exhibit extremely good hot tack seal strength at temperatures in the range of from about 200.degree. to 290.degree. F. thereby rendering them extremely useful as packaging materials in high speed packaging operations.

REFERENCES:
patent: 4291092 (1981-09-01), Weiner
patent: 4643945 (1987-02-01), Kiang
patent: 4764404 (1988-08-01), Genske et al.

Affiliated with

Also associated with

Rating

Sealable polyolefin films containing very low density ethylene c does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sealable polyolefin films containing very low density ethylene c, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sealable polyolefin films containing very low density ethylene c will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2325946