Process for the preparation of blown film and oriented film

Details Process for the preparation of blown film and oriented film Process for the preparation of blown film and oriented film

B - Operations, Transporting

29

C

18/521

B29C 55/28 (2006.01) B29C 47/00 (2006.01) C08J 5/18 (2006.01)

Patent

CA 1254710

ABSTRACT Blown film on the basis of polyethylene with a density below 910 kg/m3 is prepared by extruding the molten polymer at temperatures of the melt at the die gap of at most 160°C, the die gap width being at least 1mm, blowing the molten polymer to a balloon, cooling, flat- tening and rolling it up. Films that have been prepared this way have improved mechanical and optical properties.

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