Abstract:
Es wird eine orientierte Folie aus thermoplastischen Polymeren beschrieben, die mindestens eine vakuolenhaltige Schicht enthält. Die vakuolenhaltige Schicht enthält partikelförmige Hohlkörper, die im wesentlichen aus Polymer bestehen, das mit dem thermoplastischen Polymeren inkompatibel ist. Es wird auch ein Verfahren zur Herstellung der Folie beschrieben.
Abstract:
The invention relates to an oriented multilayer polyolefin film which comprises a polyolefinic base layer and at least one heat-sealable top layer. The heatsealable top layer contains at least one amorphous polymer which is in the top layer in the form of separated particles. The invention also relates to a process for the production of the multilayer polyolefin film and to the use of the film.
Abstract:
A propylene block copolymer having good flow properties and a very good low temperature impact strength is obtained in a high yield if a catalyst which consists of a chiral metallocene, containing a bridge, of the for- mula I (see formula I) and an aluminoxane is used for the polymerization of propylene and the comonomers. The polymerization is carried out in two stages, a crystalline propylene polymer in liquid monomers being prepared in the first stage and a copolymer in the gas phase being prepared in the second stage.