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Title:
OPTICAL LAMINATE AND IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/106487
Kind Code:
A1
Abstract:
Provided is an optical laminate comprising an optical base material, a first adhesive sheet, a first optical film, and a second adhesive sheet in this order. The thickness of the first optical film is 15 μm or less. The storage elastic modulus G' at 25 °C of the second adhesive sheet is 0.15 MPa or greater. When a first test of bonding the optical laminate to the surface of a glass sheet by the second adhesive sheet and peeling the optical laminate from the glass sheet after the lapse of seven days at 25 °C from the bonding is conducted, the degree of roughness of the peeled surface of the second adhesive sheet after the peeling is 5.5 μm or less as indicated by an arithmetic mean height Sa as defined by ISO 25178. The optical laminate is suitable for reworking while having an increased elastic modulus of the second adhesive sheet that may be an adhesive face to another member such as an image forming layer, and the thin first optical film being included.

Inventors:
NAGATA MIZUE (JP)
MATSUTA KAEDE (JP)
KIMURA TOMOYUKI (JP)
Application Number:
PCT/JP2023/041166
Publication Date:
May 23, 2024
Filing Date:
November 15, 2023
Export Citation:
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Assignee:
NITTO DENKO CORP (JP)
International Classes:
G02B5/30; B32B7/022; B32B7/023; G09F9/00; H05B33/14; H10K50/86; H10K59/10
Domestic Patent References:
WO2010064551A12010-06-10
Foreign References:
JP2004078171A2004-03-11
JP2011116816A2011-06-16
JP2020140008A2020-09-03
JP2003329832A2003-11-19
JP2013199544A2013-10-03
JP2016167040A2016-09-15
JP2002249752A2002-09-06
JP2019191570A2019-10-31
JP2019191571A2019-10-31
Attorney, Agent or Firm:
KAMADA Koichi (JP)
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