Polymer Films

摘要

A method for the preparation of a polymer film containing 300-600 gels/m2 of size in the range 100-2000 mum as measured by an optical control system (OCS) as hereinbefore described, said film being derived from an ethylene-alpha-olefin copolymer is characterised in that said copolymer is prepared in a particle forming polymerisation process in the presence of a single site catalyst system. The preferred single site catalyst system comprises a metallocene and the preferred polymerisation process is a gas phase process. The invention is particularly directed to blown films.