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:
Jun. 09, 1998
Filed:
Nov. 29, 1995
Applicant:
Inventors:
Ram K Ramesh, Greenville, SC (US);
Gautam P Shah, Simpsonville, SC (US);
Assignee:
W. R. Grace & Co.-Conn., Duncan, SC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
4284744 ; 4284755 ; 4284758 ; 4284761 ; 4284769 ;
Abstract
The present invention relates to a film material suitable for using in packaging oxygen sensitive products which emit carbon dioxide gas, such as high gassing cheeses. The multilayer film includes at least one layer containing a nylon copolymer, preferably a nylon terpolymer, having at least one aromatic comonomer comprising from about 10% to about 75% by weight of the copolymer. The resultant film material is characterized by a relatively high CO.sub.2 :O.sub.2 transmission ratio; and a CO.sub.2 transmission rate of at least 400 cc/m.sup.2 -day-atmosphere.