Title:
ADHESIVE SHEET
Document Type and Number:
WIPO Patent Application WO/2023/190322
Kind Code:
A1
Abstract:
The following is provided as an adhesive sheet that can ensure adhesion reliability, improve work efficiency, and also achieve both adhesion strength and thick film retention. This thermosetting adhesive sheet is obtained by impregnating a nonwoven fabric with an adhesive, wherein the thick film retention rate in formula (1) below is 56-95%, and the film thickness before thermosetting is at least 200 μm. (1): film thickness retention rate (%) = Tb/Ta×100 (in formula (1), Ta is the thickness of the adhesive sheet measured using a digital stiffness gauge, and Tb is the thickness of the cured adhesive sheet present between steel plate cold commercial (SPCC) measured using a digital microscope after clamping the adhesive sheet between the SPCC, heating to 150°C in a state of being pressurized with a surface pressure of 1 MPa, and holding for 20 minutes to cure the adhesive sheet. When the adhesive sheet surface has a release film, Ta is the thickness of the adhesive sheet excluding the release film).
Inventors:
HIGASHIJIMA KOKI (JP)
QIAN DANNA (JP)
TAKAGI SEIJI (JP)
QIAN DANNA (JP)
TAKAGI SEIJI (JP)
Application Number:
PCT/JP2023/012171
Publication Date:
October 05, 2023
Filing Date:
March 27, 2023
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
International Classes:
C09J7/35; B32B27/00; C09J11/04; C09J163/00
Domestic Patent References:
| WO2020201982A1 | 2020-10-08 | |||
| WO2022124336A1 | 2022-06-16 |
Foreign References:
| JP2019503406A | 2019-02-07 | |||
| JP2011162577A | 2011-08-25 | |||
| JP2022147236A | 2022-10-06 |
Attorney, Agent or Firm:
SAITOH Yukihiko et al. (JP)
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