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. 16, 2025
Filed:
Mar. 28, 2022
Toray Industries, Inc., Tokyo, JP;
Toray Industries, Inc., Tokyo, JP;
Abstract
This polypropylene film has a polypropylene-based resin as a main component, and is configured such that the value (strength X) obtained by multiplying the film thickness by the F5 value in a direction perpendicular to the principal orientation axis is 400 N/m or more and 2000 N/m or less. As measured by thermomechanical analysis (TMA), when: the thermal shrinkage (%) at 100° C. in a direction perpendicular to the principal orientation axis is SMD, 100° C.; the thermal shrinkage at 130° C. in a direction perpendicular to the principal orientation axis is SMD, 130° C.; the thermal shrinkage at 100° C. in the principal orientation axis direction is STD, 100° C.; and the thermal shrinkage at 130° C. in the principal orientation axis direction is STD, 130° C., the propropylene film satisfies |SMD, 100° C.−SMD, 130° C.|≤2.00 and |STD, 100° C.−STD, 130° C.|≤2.50.