Cast films
AssigneeNOVA Chemicals (International) S.A.
InventorsKam Wah Ho, Norman Dorien Joseph Aubee
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Abstract
“Cast” films having excellent puncture resistance and tear strength are manufactured from “pseudohomogeneous” linear low-density polyethylene resin. The preferred pseudohomogeneous resins used in the present invention are prepared with an advanced Ziegler Natta catalyst (having a magnesium component and a titanium component), preferably in medium pressure solution polymerization process. The films of this invention are especially suitable for “pallet wrapping” and for wrapping goods of unusual or uneven shapes and sizes.
Claims5
A monolayer cast film having 1) a dart impact strength as determined by ASTM D1709 of greater than 200 grams per mil;
- and 2) a slow puncture resistance of greater than 100 Joules per millimeter, wherein said cast film is prepared from a pseudohomogeneous linear low density polyethylene having a COHO ratio of from 3.5/1 to 19/1 and a stress exponent of less than 1.29.
Dependencies are inferred from the claim text.