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 49/00 (2006.01) B29C 47/00 (2006.01) B29C 47/20 (2006.01) B29C 47/86 (2006.01)

Patent

CA 1249704

ABSTRACT Blown film on the basis of low-density polyethylene is prepared by extruding the molten polymer at melt temperatures at the die gap of below 135 °C. Films that have been prepared this way have special orientation as a result of which good mechanical and optical properties are present. Oriented films are determined by X-ray diffraction analysis and have an intensity ratio of the 110 reflection band Image at least 20, and an angle a between the average orientation direction of the polymer molecules and the film extrusion direction of at most 20°.

473556

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