Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Differential temperature conditioning
Patent
1985-02-15
1987-05-12
Thurlow, Jeffery
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Differential temperature conditioning
264564, 264569, 264171, 524240, 525528, B29C 4788
Patent
active
046648666
ABSTRACT:
A polymeric film having preferential one-sided cling is prepared from a relatively crystalline polymer such as a copolymer of ethylene and an .alpha.-olefin having at least 3 carbon atoms, e.g., 1-octene (linear low density polyethylene); a relatively amorphous polymer such as low density polyethylene and a tackifying polymer such as a low molecular weight polybutene by extruding a film of the blend at melt temperatures and subsequently cooling the two sides of the extruded film at different rates.
In addition to preferential one-sided cling, a film of a low density polyethylene, linear low density polyethylene and a low molecular weight polybutene which exhibits excellent film strengths and high resistance to tear, particularly in the cross direction, is prepared.
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Kanuch Bruce M.
The Dow Chemical Company
Thurlow Jeffery
Zindrick Thomas D.
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