Title:
VARIABLE COLOR ADHESIVE SHEET
Document Type and Number:
WIPO Patent Application WO/2022/113777
Kind Code:
A1
Abstract:
This adhesive sheet (S) serving as the variable color adhesive sheet is provided with an adhesive layer (10) in which color can be changed by an external stimulus. The adhesive layer (10) before application of an external stimulus has a haze of 3% or below. A first color-change width W1 of a color-change region formed in the adhesive layer (10) by linearly applying an external stimulus to the adhesive layer (10) and a second color-change width W2 of a color-change region after the adhesive layer has been further heat-treated for 120 hours at 85°C, satisfy the relationship 0.5 ≤ W2/W1 ≤ 2.
Inventors:
MIZUNO DAISUKE (JP)
NAKANO TAKESHI (JP)
YAMAMOTO ATSUSHI (JP)
KATO MASATOSHI (JP)
NAKANO TAKESHI (JP)
YAMAMOTO ATSUSHI (JP)
KATO MASATOSHI (JP)
Application Number:
PCT/JP2021/041688
Publication Date:
June 02, 2022
Filing Date:
November 12, 2021
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
C09J7/38; C09B11/28; C09B57/00; C09J11/06; C09J133/00; C09J151/00; C09J153/00; C09J201/00; G02B5/23
Domestic Patent References:
| WO2019111611A1 | 2019-06-13 |
Foreign References:
| JPH09227845A | 1997-09-02 | |||
| US5342861A | 1994-08-30 | |||
| CN111303779A | 2020-06-19 | |||
| JPS59168080A | 1984-09-21 |
Attorney, Agent or Firm:
OKAMOTO, Hiroyuki et al. (JP)
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