| 摘要 |
Multilayer, sealable plastics films essentially consist of A: a top layer A of a polymer which is dimensionally stable at elevated temperatures and has a melting point above 200 degrees C., B: an adhesion promoter B of from 30 to 95% by weight of a styrene/butadiene block copolymer, up to 95% by weight of polystyrene and/or high impact polystyrene and from 5 to 70% by weight of a polymer which is incompatible with polystyrene and contains polar groups, the percentages being based on B, C: a substrate layer C of from 5 to 100% by weight of a styrene/butadiene block copolymer and up to 95% by weight of polystyrene and/or high impact polystyrene, D: if required, a barrier layer D which may correspond to the top layer A and E: a sealing layer E whose composition essentially corresponds to that of the adhesion promoter B.
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