HdPE films with imbalanced biaxial orientation
AssigneeMobil Oil Corporation
InventorPang-Chia Lu
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Abstract
High density polyethylene (HDPE) films, preferably containing blends of HDPE resins or microcrystalline wax, are oriented up to about two times in the machine direction and six times or more in the transverse direction to give films having good dead-fold and water vapor transmission characteristics making them highly suited for packaging, particularly for dry foods when coated with or coextruded with a heat sealable layer, e.g. Surlyn.
Claims6
A biaxially oriented high density polyethylene film comprising at least 50 weight percent of a high density polyethylene (HDPE) having a density of 0.96 or higher which is oriented in the solid state to a degree of from about 1.25:1 to about 2:1 in the machine direction, and to a degree of from about 6:1 to about 12:1 in the transverse direction.
Dependencies are inferred from the claim text.