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US 8,802,802 B2Granted
Polyethylene films having high resistance to deformation or elgonation
AssigneeEquistar Chemicals, LP
InventorD. Ryan Breese
Life of this patent
Estimating the term…
Abstract
Disclosed is a method for producing polyethylene films which have high resistance to deformation or elongation under loading in tension. The method comprises orienting in the machine direction (MD) a high density polyethylene film at a drawdown ratio effective to give the film an MD tensile strength at yield greater than or equal to 50,000 psi, wherein the HDPE has a density greater than 0.940 g/cm3.
Claims17
A composition comprising:
- a high density polyethylene film having a draw-down ratio effective to give the film an MD tensile strength at yield greater than or equal to 50,000 psi and a tensile strength at break in the transverse direction greater than 3,500 psi, wherein the HDPE has a density greater than 0.940 g/cm3, has a Mw/Mn from 9 to 17, and has a MI2 from 0.04 to 0.15 dg/min.
Dependencies are inferred from the claim text.