Title:
OPTICAL LAMINATE FOR OLED DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/163145
Kind Code:
A1
Abstract:
The present invention is an optical laminate for an OLED display device, said optical laminate being able to suppress fold marks and peeling during folding, and having a resin layer and a pressure-sensitive adhesive agent layer, wherein the dimensional change percentage D1 (%) of the resin layer from room temperature to 85°C and the dimensional change percentage D2 (%) of the same after being brought to 85°C and held at 85°C for five hours satisfy expression (A), and the creep Cr70 of the pressure-sensitive adhesive agent layer at 70°C according to the test described below is 200 μm or less. Test: A test piece that has a 20 mm tall × 30 mm wide pressure-sensitive adhesive agent layer is adhered to one end of a stainless steel test sheet, with the bonding surface of the test sheet and the pressure-sensitive adhesive agent layer being 20 mm tall × 20 mm wide, and the test piece protruding by a width of 10 mm from the one end section of the test sheet. The test sheet is fixed with the end to which the test piece is not bonded being vertically upward and the end to which the test piece is bonded being vertically downward, and in this condition, a weight is fixed to the lower edge center of the test piece and a load of 500 gf is applied vertically downward. The creep (amount of displacement) of the pressure-sensitive adhesive agent layer relative to the test sheet after 3600 seconds from the start of application of the load is measured. (A): D1–D2≤0.4
Inventors:
FUJITA MASAKUNI (JP)
NAGATA MIZUE (JP)
NAGATA MIZUE (JP)
Application Number:
PCT/JP2023/006937
Publication Date:
August 31, 2023
Filing Date:
February 27, 2023
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
C09J7/38; C09J201/00; G09F9/00; G09F9/30; H05B33/02; H10K50/00; H10K59/00
Foreign References:
| JP2020122141A | 2020-08-13 | |||
| JP2021532007A | 2021-11-25 | |||
| JP2020129429A | 2020-08-27 | |||
| US20200266368A1 | 2020-08-20 | |||
| JP2010039458A | 2010-02-18 |
Attorney, Agent or Firm:
G-CHEMICAL INTELLECTUAL PROPERTY FIRM (JP)
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