Heat sealable plastic film

摘要

This invention relates to heat-sealable plastic films PF with at least two-phased structure in the thickness range up to 400 mu m 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 DEG C.; and b) a copolymer CP with a glass transition temperature Tg above 20 DEG 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.