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:
Oct. 05, 1982
Filed:
May. 29, 1981
Applicant:
Inventor:
Norman D Bornstein, Spartanburg, SC (US);
Assignee:
W. R. Grace & Co., Duncan, SC (US);
Primary Examiner:
Int. Cl.
CPC ...
B65D / ; B65D / ; B65D / ; B65D / ;
U.S. Cl.
CPC ...
428 35 ; 428335 ; 428516 ; 428518 ; 428520 ; 428910 ; 2641 / ; 2642091 ; 2065242 ; 426127 ; 229 / ;
Abstract
Disclosed is a multi-layer, heat shrinkable, thermoplastic packaging film which will produce heat seals having improved strength both in the presence of and absence of grease at elevated temperatures, e.g., at shrink temperatures. The layer providing the sealing surface comprises an ethylene-vinyl acetate copolymer which is more crystalline and about half the thickness of the adjacent layer of less crystalline ethylene-vinyl acetate copolymer. Bags for food products can be made from the film at a faster rate than with prior art films.