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:
Nov. 18, 2025
Filed:
Dec. 03, 2020
Sekisui Kasei Co., Ltd., Osaka, JP;
Ryo Iizuka, Osaka, JP;
SEKISUI KASEI CO., LTD., Osaka, JP;
Abstract
A hydrogel sheet includes a hydrogel, and a plurality of intermediate substrates placed in the hydrogel. The plurality of intermediate substrates includes first and second intermediate substrates. The first intermediate substrate has a stretch rate of 20% to 90% measured by the following measurement method. An intermediate substrate having a 20-mm width and a 100-mm length is clamped at 70-mm intervals in the length direction. Then, the intermediate substrate is stretched in the length direction at a stretch rate of 100 mm/min, and the length L (mm) of the intermediate substrate between the clamps when the maximum load was applied is measured. The stretch rate (%) is calculated as [(L-70)/. The second intermediate substrate satisfies either (i) the stretch rate is 100% to 200%; or (ii) the stretch rate is 20% to 90% and the maximum load at the time of being fractured is 5N to 15N.