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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.:

US 12661869 B1

PDFFull Text
Date of Patent:
Jun. 23, 2026

Filed:

Dec. 20, 2021

Electrical steel sheet laminate having high stacking factor and comprising a polymeric adhesive layer comprising nanoparticles of sio2, tio2 and/or zno

Applicant:

Posco Co., Ltd, Pohang-si, KR;

Inventors:

Jungwoo Kim, Pohang-si, KR;

Bongwoo Ha, Pohang-si, KR;

Donggyu Lee, Pohang-si, KR;

Taeyoung No, Pohang-si, KR;

Gyeongryeol Park, Pohang-si, KR;

Assignee:

POSCO CO., LTD, Pohang-si, KR;

Attorney:

Morgan Lewis & Bockius LLP

Primary Examiner:

Hoa (Holly) Le

Int. Cl.
CPC ...
B32B 15/18 (2006.01); B32B 7/12 (2006.01); B32B 15/04 (2006.01); B32B 37/12 (2006.01); B32B 37/18 (2006.01); H02K 1/02 (2006.01);
U.S. Cl.
CPC ...
B32B 15/18 (2013.01); B32B 7/12 (2013.01); B32B 15/043 (2013.01); B32B 37/12 (2013.01); B32B 37/1284 (2013.01); B32B 37/18 (2013.01); H02K 1/02 (2013.01); B32B 2037/1253 (2013.01); B32B 2255/06 (2013.01); B32B 2255/26 (2013.01); B32B 2305/72 (2013.01); B32B 2307/206 (2013.01); B32B 2307/748 (2013.01); B32B 2309/12 (2013.01); B32B 2311/30 (2013.01); B32B 2457/00 (2013.01);
Abstract

The present invention relates to an electrical steel sheet laminate, and provided is an electrical steel sheet laminate comprising: a plurality of electrical steel sheets; and polymer adhesive layers positioned between the electrical steel sheets, wherein the coating thickness of the polymer adhesive layers is 1.8-5.4 μm, the space factor of the laminate is 95.8-98.5%, and the following mathematical formula 1 is satisfied. [Mathematical Formula 1] 172.4≤space factor (%)×thickness (μm)≤531.172.4≤space factor (%)×thickness(μ)≤531  [Equation 1]

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