Peelable seal film

Details Peelable seal film Peelable seal film

2008-04-08

2008-04-08

Nakarani, D. S (Department: 1794)

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

C428S475800, C428S476300, C428S483000, C428S511000, C428S515000, C428S517000, C428S518000, C428S520000, C525S070000, C525S240000, C525S241000

Reexamination Certificate

active

07354635

ABSTRACT:
The present invention is related to a heat sealable coextruded multilayer packaging film peelable on a variety of substrates including polyethylene, polypropylene, polyester, polyvinyl chloride, polyamide, polyacrylonitirle and paper, comprising at least one peelable layer from a pre-compounded precursor formulation containing: −50 to 80% by weight of an ethylene homo and/or copolymer, −15 to 25% by weight of a styrene homo or/and copolymer, −5 to 20% by weight of a thermoplastic elastomeric styrene-butadiene-styrene block copolymer, characterised in that the peel force in said peelable seal film produced by said pre-compounded precursor is modified by the presence in said precursor in the final extrusion step of 5 to 25, and preferably 10 to 20% by weight of homogeneously branched LLDPE and/or polybutene-1.

REFERENCES:
patent: 4367312 (1983-01-01), Bontinck et al.
patent: 5281453 (1994-01-01), Yamada et al.
patent: 6080456 (2000-06-01), Fonteyne
patent: 0 024 270 (1981-02-01), None

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