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US 7,011,892 B2Granted
Preparation of polyethylene films
AssigneeEquistar Chemicals, LP
InventorD. Ryan Breese
Life of this patent
Estimating the term…
Abstract
An essentially transparent, high density polyethylene film is disclosed. The film has a haze of 20% or less, a gloss of 40% or greater, and density within the range of 0.935 to 0.948 g/cc. The film is made by a high-stalk blown extrusion process and then uniaxially oriented in the machine direction.
Claims8
A polyethylene film having a haze of 20% or less and gloss greater than 50%, and consisting essentially of a Ziegler polyethylene having density within the range of 0.935 to 0.948 g/cc, wherein the film is made by a high-stalk blown extrusion process and then uniaxially oriented in the machine direction.
Dependencies are inferred from the claim text.