Stock material or miscellaneous articles – Composite – Of addition polymer from unsaturated monomers
Reexamination Certificate
2006-12-12
2006-12-12
Nakarani, D. S. (Department: 1773)
Stock material or miscellaneous articles
Composite
Of addition polymer from unsaturated monomers
C428S476100, C428S476900, C428S518000, C428S520000, C428S910000
Reexamination Certificate
active
07147930
ABSTRACT:
A coextruded heat-shrinkable, biaxially-oriented multilayered packaging film comprising a first layer, a second polymer layer, a third polymer layer, and a fourth polymer layer wherein the first polymer layer comprises a first ethylene/α-olefin copolymer preferably, an ethylene/α-olefin copolymer having an α-olefin comprising 4–8 pendant carbon atoms, a melting point of less than 105° C., a molecular weight distribution Mw/Mnof from 1–2.7, a melt index of from 6.5–34 g/10 min. at 190° C., and is present in the first layer is an amount of from 50–100%, based on the total weight of said first layer. The second layer comprises a second ethylene/α-olefin copolymer having a melt index of from 0.85–6.0 g/10 min. Preferably, A is the cumulative total weight percentage of the first ethylene/α-olefin copolymer in all layers of the film and B is the cumulative total weight percentage of the second ethylene/α-olefin copolymer in all layers of the film, such that the relative amounts A and B satisfy the relationship 2A/B≦1. The invention includes a package comprising the coextruded heat-shrinkable, biaxially-oriented multilayered packaging film.
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Pockat Gregory Robert
Schell Thomas Andrew
Curwood Inc.
Hall Tom J.
Nakarani D. S.
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