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, 1991
Filed:
Sep. 08, 1989
Applicant:
Inventors:
Yasuo Yoshinaka, Shiga, JP;
Katsuaki Kuze, Shiga, JP;
Tsutomu Isaka, Komaki, JP;
Toshihiro Yamashita, Inuyama, JP;
Yujiro Matsuyama, Otsu, JP;
Koichiro Nakamura, Shiga, JP;
Tsuyoshi Matsunaga, Fukui, JP;
Osamu Makimura, Ogaki, JP;
Assignee:
Toyo Boseki Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528272 ; 5283081 ; 5283082 ; 5283086 ; 528502 ; 528503 ; 2642107 ; 26421112 ;
Abstract
A thermo-shrinkable polyester film of this invention is obtained from a composition that comprises acid components including terephthalic acid and glycol components including ethyleneglycol. The polyester film has a heat-shrinkage ratio of 30% or more in a certain direction at 100.degree. C., and a shrinkage ratio of 5% or more at the point of intersection of a curve showing the internal shrinkage stress of the film and a curve showing the tensile stress of the film.