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:
Dec. 03, 1991
Filed:
Mar. 28, 1991
Diafoil Company, Ltd., Tokyo, JP;
Abstract
A shrinkable copolyester film having shrinkage of not less than 30% in the direction (main shrink direction) of either the machine direction or the transverse direction after 5 min treatment in an air oven at 100.degree. C., a shrinkage of not more than 20% in the other direction perpendicular to the main shrink direction after 5 min treatment in an air oven at 100.degree. C., an initial shrinkage stress (F.sub.0) of not more than 2000 g/mm.sup.2 in the main shrink direction during the course of 5 sec after dipped in a silicone oil of 75.degree. C., a shrinkage stress (F.sub.20) of not less than (F.sub.0 -100) g/mm.sup.2, after 20 sec dipping in a silicone oil at 75.degree. C., and a glass transition temperature of 35.degree. to 65.degree. C., is disclosed. The shrinkable copolyester film of the present invention is excellent in shrinkage properties, i.e., substantially free from wrinkles, distortion of film and uneven shrinkage, and is suitable for a shrinkable label for a PET bottle, etc.