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:
Apr. 29, 2014
Filed:
Jun. 08, 2010
Applicant:
Jeffrey C. Haley, Cincinnati, OH (US);
Inventor:
Jeffrey C. Haley, Cincinnati, OH (US);
Assignee:
Equistar Chemicals, LP, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 27/08 (2006.01); B32B 27/00 (2006.01); B32B 27/30 (2006.01); B32B 27/32 (2006.01); B29C 65/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed is a multilayer film. The multilayer film has the general structure of A/B/A/C or B/A/B/C, wherein A is a nucleated high density polyethylene (HDPE) layer, B is a single or multilayer structure, and C is a seal layer. Adding a nucleating agent to HDPE improves the water vapor barrier property of the HDPE layer and the multilayer film, but it also causes the multilayer film to curl in the conventional multilayer film structures. The invention provides a multilayer film, which includes at least one layer of nucleated HDPE, with reduced or eliminated curling while retaining high water vapor barrier.