Stock material or miscellaneous articles – Composite – Of addition polymer from unsaturated monomers
Reexamination Certificate
2011-05-31
2011-05-31
Ahmed, Sheeba (Department: 1787)
Stock material or miscellaneous articles
Composite
Of addition polymer from unsaturated monomers
C428S515000
Reexamination Certificate
active
07951461
ABSTRACT:
A multi-layer, gas-barrier, biaxially oriented and heat-shrinkable film includes a first outer heat-sealable layer, an inner gas-barrier layer, and a second outer abuse resistant layer, the film containing at least 28%, by weight of the film, of polystyrene polymer, such as a high styrene styrene-butadiene block copolymer. The polystyrene copolymer can be present in the second outer abuse-resistant layer, and/or in one or more inner layers positioned between the first outer heat-sealable layer and the inner gas-barrier layer, and/or in one or more inner layers positioned between the gas-barrier layer and the second outer abuse layer. The film of the invention is particularly suitable to be deep-drawn to form a flexible container in a packaging process where the final vacuum lidded package is heat-shrunk.
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Paleari Mario
ReFraschini Marco
Ursino Felice
Ahmed Sheeba
Cryovac Inc.
Qüatt Mark B.
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