Title:
ADHESIVE SHEET
Document Type and Number:
Japanese Patent JP2022096692
Kind Code:
A
Abstract:
To provide an acrylic adhesive sheet with an improved adhesive force against a low-surface free energy face, while maintaining an excellent holding force.SOLUTION: There is provided an adhesive sheet including an adhesive layer. The adhesive layer contains an acrylic polymer and a tackifier resin. In the acrylic polymer, an alkyl (meth)acrylate having an alkyl group having 6 or more carbon atoms at an ester terminal is polymerized at a rate of 15 wt.% or more. In the acrylic polymer, a carboxy group-containing monomer is not copolymerized or a copolymerization ratio of the carboxy group-containing monomer is less than 10 wt.%. In the adhesive layer, a content of the tackifier resin is 40 to 80 pts.wt., inclusive, based on 100 pts.wt. of the acrylic polymer. The adhesive layer contains, as the tackifier resin, a tackifier resin TL with a softening point of 110°C or lower. The tackifier resin TL accounts for 60 wt.% or more of the total amount of the tackifier resin contained in the adhesive layer.SELECTED DRAWING: Figure 1
Inventors:
WATANABE SHIGEKI
YAMAMOTO KENICHI
YAMAMOTO KENICHI
Application Number:
JP2020209794A
Publication Date:
June 30, 2022
Filing Date:
December 18, 2020
Export Citation:
Assignee:
NITTO DENKO CORP
International Classes:
C09J7/38; C09J11/06; C09J133/04
Domestic Patent References:
| JP2015165023A | 2015-09-17 | |||
| JP2017214595A | 2017-12-07 | |||
| JP2017538810A | 2017-12-28 | |||
| JP2020097649A | 2020-06-25 | |||
| JP2020019928A | 2020-02-06 | |||
| JP2021161138A | 2021-10-11 | |||
| JP2018177902A | 2018-11-15 |
Foreign References:
| WO2015037378A1 | 2015-03-19 |
Attorney, Agent or Firm:
Michiko Oi
Masafumi Tani
Masafumi Tani
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