Oriented polyethylene film and production thereof

Details Oriented polyethylene film and production thereof Oriented polyethylene film and production thereof

1989-09-07

1991-09-03

Teskin, Fred

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

428516, 428910, 264 22, 2642884, 2642888, 264291, 26433117, 264345, 522161, 525240, C08F 1002, B29C 3508

Patent

active

050456202

ABSTRACT:
Disclosed are oriented polyethylene films having specific elongation and strength, which are excellent in linear tearability and clear tearability, suitably used for packaging and produced by longitudinally stretching a polyethylene resin sheet in which the degree of crosslinking inwardly decreases across the thickness thereof at a draw ratio of at least 5 times at a temperature of not higher than the melting point of a polyethylene resin forming the polyethylene resin sheet, and laterally stretching said sheet 4 to 8 times at a temperature ranging from above the melting point of the polyethylene resin up to 10.degree. C. higher than the melting point thereof.

REFERENCES:
patent: 4226905 (1980-10-01), Harbourne
patent: 4258166 (1981-03-01), Canterino et al.
patent: 4705714 (1987-11-01), Itaba et al.
Polymer Chemistry, Seymour et al. (2nd ed.) Marcel Dekker, Inc.; N.Y., xii-xiii, 1988.

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