| 摘要 |
<p>1. Plasticiser-free polyolefin film or polyolefin film web consisting of a mixture or an alloy of at least one polyolefin with a partially crystalline proportion, in an amount by weight of 78 to 99.2 weight per cent, preferably 80 to 98 weight per cent and 22 to 0.8 weight per cent, preferably 20 to 2 weight per cent, of a mixture consisting of at least one finely divided filler or filler mixture and at least one copolymer and/or graft polymer of ethylene or propylene with unsaturated dicarboxylic acids, preferably co- and/or graft polymers of ethylene/acrylic acid, ethylene/methacrylic acid, ethylene/maleic acid or ethylene/maleic anhydride, co- and/or graft polymers of propylene maleic acid or propylene/maleic anhydride, propylene/acrylic acid or mixtures or alloy of two or more of the copolymers optionally toghether with processing aids, characterised in that the mixture or the alloy of at least one polyolefin with a partially crystalline proportion consists of a propylene homopolymer with a crystalline proportion under 75%, preferably under 70%, propylene/ethylene copolymer or graft polymer with a crystalline proportion under 70%, preferably under 65%, or a polyethylene of high density, preferably a density above 0.94 g/cm**3 , with a crystalline proportion under 70%, preferably under 65%, and the ratio of the finely divided non layer-like or plate-like filler to the copolymer or graft polymer on the basis of ethylene or propylene with unsaturated dicarboxylic acid or its anhydride in the polyolefin film or polyolefin film web is 1:20 to 2:1, preferably 1:10 to 1:1, the non layer-like or plate-like filler consists of at least one particle-like filler with an average particle size or an average grain diameter of less than 10 mu m, preferably less than 5 mu m, of a hydroxide and/or oxide of magnesium, of aluminium and/or of silicon, preferably of an oxide of silicon, and the ethylene or propylene copolymer or graft polymer has a melt index 190 degrees C/2.16 Kp more than 1.5 g/10 min and a dicarboxylic acid and anhydride proportion of 1.2 to 25 weight per cent, preferably 1.5 to 20 weight per cent, (calculated on 100 parts by weight of the copolymer or graft polymer of ethylene or propylene and unsaturated dicarboxylic acid or dicarboxylic anhydride).</p> |
