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. 09, 2025
Filed:
Jan. 26, 2021
Applicant:
3m Innovative Properties Company, St. Paul, MN (US);
Inventors:
Tomoaki Uchiya, Tokyo, JP;
Guanqiao Li, Sagamihara, JP;
Assignee:
3M INNOVATIVE PROPERTIES COMPANY, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09J 7/35 (2018.01); B32B 5/02 (2006.01); B32B 7/12 (2006.01); B32B 27/12 (2006.01); B32B 27/36 (2006.01); C08K 7/18 (2006.01);
U.S. Cl.
CPC ...
C09J 7/35 (2018.01); B32B 5/022 (2013.01); B32B 7/12 (2013.01); B32B 27/12 (2013.01); B32B 27/36 (2013.01); C08K 7/18 (2013.01); B32B 2250/02 (2013.01); B32B 2255/10 (2013.01); B32B 2255/26 (2013.01); B32B 2260/021 (2013.01); B32B 2260/046 (2013.01); B32B 2307/542 (2013.01); B32B 2405/00 (2013.01); C08K 2201/003 (2013.01); C09J 2301/1242 (2020.08); C09J 2301/408 (2020.08); C09J 2301/412 (2020.08);
Abstract
An adhesive sheet is a thermally expandable and thermosetting adhesive sheet including a substrate and a first layer provided on at least one surface of the substrate. The first layer contains an adhesive portion having an adhesive composition and thermally expandable first particles contained within the adhesive composition, and second particles provided in the adhesive portion and having different materials from those of the first particles, and each of the second particles is larger than each of the first particles.