Medium modulus polyethylene film and fabrication method

Details Medium modulus polyethylene film and fabrication method Medium modulus polyethylene film and fabrication method

1995-06-06

1997-10-28

Wilson, D. R.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

428220, 525240, B29C 4916, C08L 2308

Patent

active

056815239

ABSTRACT:
Medium modulus, polyethylene films and bags with improved tear performance are made for heavy-duty packaging applications and hot-fill uses. Film compositions contain high molecular weight linear polyethylene and linear ethylene/.alpha.-olefin interpolymer. The film is at least about 1.25 mils (31 microns) thick and is characterized as having a calculated film density in the range of about 0.923 to about 0.95 grams/cubic centimeter (g/cc) and typically has a tear strength or impact resistance at least 30 percent greater than current industrial polyethylene film. The novel film has superior dimensional stability and strength properties which allow significant down-gauging relative to industrial films used as heavy-duty overwraps, sleeves and bags.

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