B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/06 (2006.01) B32B 27/16 (2006.01) B32B 27/32 (2006.01)
Patent
CA 2100360
2100360 9212010 PCTABS00014 Multilayer thermoplastic film structures comprising at least one heat-sealable outer layer (A) and at least one core layer (B) are disclosed. Layer (A) has improved heat sealability after irradiation (e.g. electron beam). Layer (B) has improved shrinkage after irradiation. Layer (A) is a linear polyethylene having a melt index from 2 to 20 g/10 minutes, a density from 0.88 to 0.92 g/cm3, a molecular weight distribution (I10/I2) from 5 to 8, a fraction of the polyethylene having a degree of branching less than or equal to 2 methyls/1000 carbons of not more than 15 percent by weight and a fraction of the polyethylene having a degree of branching greater than or equal to 25 methyls/1000 carbons of not more than 25 percent by weight of the polymer. Layer (B) is a linear polyethylene having a melt index from 0.05 to 5 g/10 minutes, a density from 0.88 to 0.94 g/cm3 and a molecular weight distribution (I10/I2) from 8 to 30.
Chum Pak-Wing S.
Koch Kaelyn C.
Smart & Biggar
The Dow Chemical Company
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