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. 30, 2004
Filed:
Oct. 23, 2001
Michael John Bader, Fairport, NY (US);
ExxonMobil Oil Corporation, Irving, TX (US);
Abstract
The present invention relates to bioriented polyethylene films having high water vapor transmission rates (WVTR) and methods for preparing the same. The film comprises a base layer and skin layers. The base layer comprises highly cavitated polyethylene, such as medium density polyethylene (MDPE) or high density polyethylene (HDPE). The cavitating agent in the base layer may be calcium carbonate. At least one skin layer comprises (i) a copolymer of ethylene and at least one other monomer and (ii) a hydrocarbon resin, such as a cyclopentadiene resin. This copolymer (i) may be an ethylene-propylene copolymer or an ethylene-propylene-butene-1 terpolymer. The film may have unidirectional tear properties in the machine direction. This film is particularly useful for packaging food products, such as pieces of candy.