Title:
ADHESIVE SHEET
Document Type and Number:
WIPO Patent Application WO/2019/065817
Kind Code:
A1
Abstract:
Provided is an adhesive sheet, wherein the adhesive strength of an adhesive layer before irradiation is designed such that the adhesive layer can be re-attached and unnecessary portions can be peeled off thereafter, and the adhesive strength in necessary portions of the adhesive layer is increased by irradiation such that the necessary portions remain as an adhesive substance on an adherend and unnecessary portions can be peeled off and removed. Provided is an adhesive sheet having an acrylic adhesive layer on a substrate, wherein the adhesive strength of the adhesive layer is increased by irradiation, the adhesive layer is formed of an acrylic adhesive derived from raw materials including (A) an acrylic polymer containing active hydrogen, (B) a crosslinker, (C) a monofunctional acrylic monomer that does not have active hydrogen, and (D) a photoinitiator, the adhesive strength of the adhesive layer is 1 N/25 mm or less before irradiation and at least 5 N/25 mm after irradiation, and the adhesive strength of the adhesive layer after irradiation is five times higher than that before irradiation.
Inventors:
WATANABE TAKENARI (JP)
IGARASHI SAORI (JP)
IGARASHI SAORI (JP)
Application Number:
PCT/JP2018/035879
Publication Date:
April 04, 2019
Filing Date:
September 27, 2018
Export Citation:
Assignee:
SAIDEN CHEMICAL IND CO LTD (JP)
International Classes:
C09J7/38; C09J4/02; C09J11/06; C09J133/06
Domestic Patent References:
| WO2015080120A1 | 2015-06-04 | |||
| WO2013061938A1 | 2013-05-02 | |||
| WO2017022770A1 | 2017-02-09 |
Foreign References:
| JPH0617008A | 1994-01-25 | |||
| JP2013209487A | 2013-10-10 | |||
| US20150025227A1 | 2015-01-22 |
Attorney, Agent or Firm:
KONDO Rieko et al. (JP)
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