Packaging film

Details Packaging film Packaging film

2007-11-06

2007-11-06

Wu, David W. (Department: 1713)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

C428S348000, C428S516000

Reexamination Certificate

active

10477187

ABSTRACT:
A self supporting film of polyolefinic polymer(s) is described, the film having a first and a second surface where a first exposed surface of the film (A) comprises a polymeric low temperature sealable coating (LTSC) and where the second exposed surface of the film (B) comprises an olefinic polymer capable of forming a seal to the LTSC at a minimum temperature of at most about 100° C. when measured at 15 psi for 2 seconds, such that the first and second surfaces of the film have a mutual heat seal strength (A to B) of at least about 200 g/25 mm, when measured at 15 psi for 2 seconds at 120° C.; where the LTSC also comprises: (a) an anti-block additive in from an effective amount to about 15% by dry weight of the coating (b) a non-ionic anti-mist additive having an HLB value of up to about 20; and (c) optionally an anti-slip additive of a mean particle size of from about 3 to about 5 microns in an effective amount up to about 0.5% by dry weight of the coating.

REFERENCES:
patent: 5419960 (1995-05-01), Touhsaent
patent: 5451460 (1995-09-01), Lu et al.
patent: 5843582 (1998-12-01), McGee
patent: 6013353 (2000-01-01), Touhsaent
patent: 6764751 (2004-07-01), Poirier
patent: 0 549 234 (1993-06-01), None
patent: 00 63309 (2000-10-01), None
DATABASE WPI, Section Ch, Week 199320, Derwent Publications Ltd., London, GB; Class A17, An 1993-164012 ‘Abstract of JP 05 096694A, Apr. 20, 1993’.

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