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:
Jul. 05, 1988
Filed:
Mar. 21, 1986
Applicant:
Inventor:
Gautam P Shah, Simpsonville, SC (US);
Assignee:
W. R. Grace & Co., Cryovac Div., Duncan, SC (US);
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428220 ; 428 35 ; 428349 ; 4284761 ; 4284769 ; 428516 ; 428518 ;
Abstract
A coextruded multiple layer oriented film comprises a core layer of ethylene vinyl alcohol copolymer, and two intermediate layers each comprising a polyamide. Two outer layers comprising polymeric materials or blends of polymeric materials such as (a) linear low and linear medium density polyethylene, and EVA, and (b) blends of polypropylene and ethylene propylene copolymer are adhered to the intermediate polyamide layers by means of modified polymeric adhesive materials. A multilayer film with a combination of oxygen barrier properties, toughness, shrinkability, and good optical properties is obtained.