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. 23, 1981
Filed:
Jul. 09, 1979
Applicant:
Inventors:
Walter B Mueller, Taylors, SC (US);
Henry G Schirmer, Spartanburg, SC (US);
Julian H Schoenberg, Greenville, SC (US);
Alan S Weinberg, Greenville, SC (US);
Assignee:
W. R. Grace & Co., Duncan, SC (US);
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B32B / ; B32B / ; B32B / ;
U.S. Cl.
CPC ...
156229 ; 15624411 ; 15624417 ; 156311 ; 264181 ; 2642107 ; 426412 ; 428335 ; 428483 ; 428523 ; 428910 ;
Abstract
The multi-layer polyester/polyolefin shrink film of this invention provides a combination of shrink tension, hot seal strength, sealability, and shrink temperature range heretofore unobtainable in an oriented, monolayer polyolefin material. The preferred film has five layers in which the middle layer comprises a polyester or copolyester, two inner layers adjacent the middle layer comprise ethylene-vinyl actate copolymer, and the skin or outer layers comprise an ethylene-propylene copolymer.