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:
Feb. 26, 1985
Filed:
Oct. 05, 1981
Applicant:
Inventors:
Joseph C Hsu, Neenah, WI (US);
Donald W Vought, Neenah, WI (US);
George H Walbrun, Menasha, WI (US);
Assignee:
American Can Company, Greenwich, CT (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B65D / ; B32B / ;
U.S. Cl.
CPC ...
428 35 ; 2641 / ; 428215 ; 428220 ; 428349 ; 428518 ;
Abstract
A three layer heat shrinkable film is disclosed, along with preferred process for making it. The film comprises a first heat sealable layer of an ionomer, a second layer of a vinylidene chloride copolymer, and a third layer of a blend of an ionomer and an EVA copolymer. The EVA content is no greater than 20% of the blend by weight, and the vinyl acetate content is at least 4.5% of the blend by weight. In the preferred process, a three layer tape is coextruded and cooled, and reheated to 197.degree.-203.degree. F., and oriented in a conventional double bubble process.