Borealis Technology Oy

Petri Lehmus

Eberhard Ernst

Manfred Stadlbauer

Lauri Huhtanen

Olli Tuominen

Päivi Pitkänen

Christian Paulik

Yvo Daniels

Michael Bartke

Kimmo Hakala

Manfred Arnold

Andreas Meinecke

Udo Manfred Stehling

Franck Jacobs

The present technology relates to a biaxially oriented polypropylene film. The biaxially oriented polypropylene film comprises a polypropylene material having xylene solubles of at least 0.5 percent by weight. The polypropylene also has a strain hardening index of at least 0.15 measured at a deformation rate d&#x3b5;/dt of 1.00 sat a temperature of 180&#xb0; C. In certain embodiments, the strain hardening index is defined as the slope of a logarithm to the basis 10 of a tensile stress growth function as a function of a logarithm to the basis 10 of a Hencky strain for the range of Hencky strains between 1 and 3.

Biaxially oriented polypropylene film

A process for manufacturing a branched polypropylene, said branched polypropylene having a branching index g' of less than 1.00, the process comprising the step of polymerizing propylene and optionally one or more other comonomers under non-supercritical conditions in a reaction vessel, wherein:

Process for the manufacture of branched polypropylene

The invention provides a process for the preparation of a propylene polymer in which proplylene and a comonomer copolymerizable therewith and of greater molecular weight than propylene are polymerized in a single site catalyst catalized polymerization reaction, characterized in that said polymerization reaction is effected at least in part at a temperature of at least 70&#xb0; C.

Polymerization process for producing propylene copolymers

The invention provides a process for the preparation of a propylene polymer in which propylene and a comonomer copolymerizable therewith and of greater molecular weight than propylene are polymerized in a single site catalyst catalized polymerization reaction, characterised in that said polymerization reaction is effected at least in part at a temperature of at least 70&#xb0; C.

Polymerization process for producing copolymers

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Helsinki, Finland

Petri Lehmus