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. 01, 2003
Filed:
Apr. 18, 2001
Applicant:
Inventors:
Hans Joachim Pip, Arlon, BE;
Rhonda Rogers Agent, Rochester, NY (US);
Assignee:
ExxonMobil Oil Corporation, Fairfax, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 4/706 ;
U.S. Cl.
CPC ...
B29C 4/706 ;
Abstract
Methods of producing polyethylene films having a desired water vapor transmission rate (WVTR) are provided. The methods include casting a polyethylene sheet which has a base layer of a polyethylene and a cavitating agent, and at least one layer of a WVTR-controlling material, and subsequently biaxially orienting the sheet to yield a film having the desired WVTR. The base layer has a porous microstructure and a WVTR substantially higher than the desired WVTR.