Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Production of continuous or running length
Patent
1986-07-30
1989-04-11
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Production of continuous or running length
264173, 2641761, 425 721, 5263522, B29C 4786
Patent
active
048204714
ABSTRACT:
Blown film on the basis of polyethylene with a density below 910 kg/m.sup.3 is prepared by extruding the molten polymer having a melt index of at least 2 dg/min at temperatures of the melt at the die gap of at most 160.degree. C., the die gap width being at least 2 mm, blowing the molten polymer to a balloon, cooling, flattening and rolling it up. Films that have been prepared this way have improved mechanical and optical properties and are highly oriented.
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Stamicarbon B.V.
Thurlow Jeffery
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