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. 11, 2025
Filed:
Jun. 01, 2020
Toyobo Co., Ltd., Osaka, JP;
Masayuki Haruta, Tsuruga, JP;
Norimi Tabota, Osaka, JP;
TOYOBO CO., LTD., Osaka, JP;
Abstract
[Problem] To provide a heat-shrinkable polyester film having excellent shrink finishing property due to the film's sufficient heat shrinkability and low shrinkage stress in the longitudinal direction, small change in the non-shrinkable direction of the film. [Solution] The heat-shrinkable polyester film which heat-shrinks in the longitudinal direction and satisfying the following (1) to (6); (1) having a shrinkage of 35% to 70% in the longitudinal direction; (2) having a shrinkage of −8% to 7% in the width direction; (3) having a change rate of 5% to 22% when fixed in the longitudinal direction with fixed-length; (4) having a change rate of 5% to 20% in the width direction when fixed with 10% of slack in the longitudinal direction; (5) having a maximum shrinkage stress of 5 MPa to 15 MPa in the longitudinal direction; (6) having a stress at 10% elongation, F10, of 1 MPa to 5 MPa in the longitudinal direction and 0.5 MPa to 3 MPa in the width direction.