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:
Aug. 11, 2026
Filed:
Sep. 13, 2022
Mitsubishi Chemical Corporation, Tokyo, JP;
Kohei Hirose, Tokyo, JP;
Akifumi Matsushita, Tokyo, JP;
Kouta Taniguchi, Tokyo, JP;
Eri Masuda, Tokyo, JP;
Nobuaki Kanazawa, Tokyo, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
What is provided is an adhesive sheet in which a high level of both unevenness followability during bonding and shape holding power when not bonded is achieved and flexibility especially in a low-temperature environment is excellent. The adhesive sheet includes an adhesive layer formed from an adhesive composition containing a (meth)acrylic copolymer, in which (1) when the thickness is set to 0.7 to 1.0 mm, a strain (creep strain) by applying a pressure of 2 kPa at a temperature of 60° C. for 600 seconds is 1000% or more and 100000% or less, (2) in a holding power measurement in accordance with JIS-Z-0237 (ISO29863), a falling time when the adhesive sheet is adhered to a SUS plate with an area of 20 mm×20 mm and a load of 500 gf is applied in an atmosphere of 40° C. is 60 seconds or more, and (3) when the thickness is set to 0.7 to 1.0 mm, a storage shear modulus at −20° C. (G' (−20° C.)) obtained by a dynamic viscoelasticity measurement in a shear mode at a frequency of 1 Hz is 10 kPa or more and 1000 kPa or less are satisfied.