The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 2003
Filed:
May. 17, 2002
Sameer D. Mehta, Mason, OH (US);
Equistar Chemicals, LP, Houston, TX (US);
Abstract
A blend comprising a high molecular weight, high density polyethylene (HMW HDPE) and a linear low density polyethylene (LLDPE) is disclosed. The blend comprises from about 50 wt. % to about 80 wt. % of HMW HDPE. The HMW HDPE has a density greater than about 0.94 g/cc and a melt index MI less than about 0.1 dg/min. The blend also comprises about 20 wt. % to about 50. wt % of LLDPE. The LLDPE has a density within the range of about 0.90 to about 0.93 g/cc and an MI within the range of about 0.5 to about 5 dg/min. The LLDPE is a copolymer of ethylene with 1-hexene that has a dart drop impact strength of greater than about 500 grams as measured by ASTM D1709/A. The blend shows increased resistance to environmental stress cracking.