公开(公告)号：US12221562B2

公开(公告)日：2025-02-11

申请号：US17056453

申请日：2019-05-22

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Shuji Takagi ,  Koji Tsuda ,  Pradip K. Bandyopadhyay

IPC: C09J163/04 ,  C09J7/25 ,  C09J7/26 ,  C09J7/35

Abstract: [Problem] To provide a thermally expandable adhesive sheet which is tack-free in the state prior to use and exhibits high workability using a different means than that of related art. [Solution] The present invention provides a thermally expandable adhesive sheet (1) including: a substrate (3); two thermally expandable adhesive layers (5) each provided on either side of the substrate; and two adhesive permeable layers (7) each provided on a surface of the two adhesive layers, the adhesive permeable layers being permeable to the adhesive at the time of the thermal expansion of the adhesive. By heating the adhesive sheet, it is possible to expand the adhesive sheet while simultaneously allowing the adhesive to emerge on the outermost surface of the adhesive sheet.

公开(公告)号：US20210207010A1

公开(公告)日：2021-07-08

申请号：US17056453

申请日：2019-05-22

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Shuji Takagi ,  Koji Tsuda ,  Pradip K. Bandyopadhyay

IPC: C09J163/04 ,  C09J7/35 ,  C09J7/26 ,  C09J7/25

Abstract: [Problem] To provide a thermally expandable adhesive sheet which is tack-free in the state prior to use and exhibits high workability using a different means than that of related art. [Solution] The present invention provides a thermally expandable adhesive sheet (1) including: a substrate (3); two thermally expandable adhesive layers (5) each provided on either side of the substrate; and two adhesive permeable layers (7) each provided on a surface of the two adhesive layers, the adhesive permeable layers being permeable to the adhesive at the time of the thermal expansion of the adhesive. By heating the adhesive sheet, it is possible to expand the adhesive sheet while simultaneously allowing the adhesive to emerge on the outermost surface of the adhesive sheet.

公开(公告)号：US20180262073A1

公开(公告)日：2018-09-13

申请号：US15916921

申请日：2018-03-09

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Shuji Takagi ,  Sybil Z. Wong ,  Robert L. Lambert ,  Pradip K. Bandyopadhyay ,  David V. Mahoney

IPC: H02K3/30 ,  H02K3/34 ,  B32B7/12 ,  B32B3/04 ,  B32B27/28 ,  B32B27/34 ,  B32B27/36 ,  B32B27/08

CPC classification number: H02K3/30 ,  B32B3/04 ,  B32B7/12 ,  B32B27/08 ,  B32B27/281 ,  B32B27/286 ,  B32B27/34 ,  B32B27/36 ,  B32B2250/02 ,  B32B2255/26 ,  B32B2307/206 ,  B32B2367/00 ,  B32B2377/00 ,  B32B2379/08 ,  B32B2457/00 ,  H01B3/002 ,  H02K3/345

Abstract: An electrical insulating material is described herein. The electrical insulating material comprises an insulating core layer and at least one cured epoxy layer coated on a first major surface of the insulating core layer. In some aspects, the exemplary electrical insulating material can further include a second cured epoxy layer coated on a second major surface of the insulating core layer.