Heat sealable plastic film

Details Heat sealable plastic film Heat sealable plastic film

C - Chemistry, Metallurgy

08

L

C08L 33/10 (2006.01) B32B 27/08 (2006.01)

Patent

CA 2085946

ABSTRACT OF THE DISCLOSURE This invention relates to heat-sealable plastic films PF with at least two-phased structure in the thickness range up to 400 µm that are suitable for tightly sealing plastic comprising a) a high molecular weight or crosslinked polymer P with a molecular weight Mw greater than 50,000 and a glass transition temperature Tg below 10°C; and b) a copolymer CP with a glass transition temperature Tg above 20°C made up of .alpha.) 0-85 wt.% methyl methacrylate .beta.) 0-100 wt. ethyl methacrylate .gamma.) 0-100 wt. cyclohexyl methacrylate, cyclopentyl methacrylate, or a mixture thereof; .delta.) 0-20 wt.% of a monomer copolymerizable with the monomers .alpha.)-.gamma.), and different from them, provided that the sum of the components .alpha.) to .delta.) is 100 wt.% wherein at least 2 wt.% of copolymer CP is covalently bound to polymer P.

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