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Title:
TRANSPARENT ADHESIVE OPTICAL SHEET, LAMINATE AND BONDED STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2019/026577
Kind Code:
A1
Abstract:
The present invention provides a transparent adhesive optical sheet which has excellent flexibility, while being suppressed in the occurrence of delayed bubbles in a high-temperature high-humidity environment. A transparent adhesive optical sheet according to the present invention sequentially comprises a first surficial adhesive layer, an intermediate adhesive layer and a second surficial adhesive layer in this order. The storage elastic moduli of the first surficial adhesive layer and the second surficial adhesive layer at 85°C are higher than the storage elastic modulus of the intermediate adhesive layer at 85°C; the storage elastic moduli of the first surficial adhesive layer and the second surficial adhesive layer at 85°C are from 3.0 × 104 Pa to 30.0 × 104 Pa (inclusive); the storage elastic modulus of the intermediate adhesive layer at 85°C is from 1.0 × 104 Pa to 15.0 × 104 Pa (inclusive); and the intermediate adhesive layer contains a polyurethane.

Inventors:
NAITO, Hiroki (6-6, Minatojima Minamimachi 4-chome, Chuo-ku, Kobe-sh, Hyogo 47, 〒6500047, JP)
TAKAGI, Daisuke (6-6, Minatojima Minamimachi 4-chome, Chuo-ku, Kobe-sh, Hyogo 47, 〒6500047, JP)
Application Number:
JP2018/026156
Publication Date:
February 07, 2019
Filing Date:
July 11, 2018
Export Citation:
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Assignee:
BANDO CHEMICAL INDUSTRIES, LTD. (6-6 Minatojima Minamimachi 4-chome, Chuo-ku Kobe-sh, Hyogo 47, 〒6500047, JP)
International Classes:
C09J7/38; B32B7/02; B32B27/00; B32B27/40; C09J133/00; C09J175/04; C09J201/00
Attorney, Agent or Firm:
YASUTOMI & ASSOCIATES (5-36, Miyahara 3-chome Yodogawa-ku, Osaka-sh, Osaka 03, 〒5320003, JP)
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