B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/28 (2006.01) B32B 1/00 (2006.01) B32B 27/08 (2006.01) B32B 27/32 (2006.01) B65D 65/40 (2006.01)
Patent
CA 2488650
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/.alpha.-olefin copolymer preferably, an ethylene/.alpha.-olefin copolymer having an .alpha.- olefin comprising 4-8 pendant carbon atoms, a melting point of less than 105° C., a molecular weight distribution M w/M n of from 0.05- 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/.alpha.-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/.alpha.-olefin copolymer in all layers of the film and B is the cumulative total weight percentage of the second ethylene/.alpha.-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.
Pockat Gregory Robert
Schell Thomas Andrew
Curwood Inc.
Sim & Mcburney
LandOfFree
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