Title:
積層体、光学部材および光学装置
Document Type and Number:
Japanese Patent JP7423181
Kind Code:
B2
Abstract:
The present invention provides a laminate of a void-containing layer and a pressure-sensitive adhesive/adhesive layer that achieves both a pressure-sensitive adhesive force or an adhesive force and a reduction of a tendency of a pressure-sensitive adhesive or an adhesive to penetrate into voids. The first laminate of the present invention includes: a void-containing layer (20); and a pressure-sensitive adhesive/adhesive layer (30), wherein the pressure-sensitive adhesive/adhesive layer (30) is directly laminated on one or both sides of the void-containing layer (20), the void-containing layer (20) has a void fraction of 35 vol% or more, and, after a heat/humidification durability test of holding at a temperature of 85°C and a relative humidity of 85% for 500 hours, a void remaining ratio of the void-containing layer (20) is 50 vol% or more before the heat/humidification durability test.
Inventors:
Daisuke Hattori
Ryota Morishima
Atsushi Kishi
Akiko Sugino
Ryota Morishima
Atsushi Kishi
Akiko Sugino
Application Number:
JP2018180954A
Publication Date:
January 29, 2024
Filing Date:
September 26, 2018
Export Citation:
Assignee:
NITTO DENKO CORPORATION
International Classes:
B32B27/30; B32B5/18; B32B7/02; B32B27/00
Domestic Patent References:
| JP2011021109A | ||||
| JP2017047677A | ||||
| JP2014046518A | ||||
| JP2017025277A | ||||
| JP2007138147A |
Foreign References:
| WO2017010502A1 | ||||
| WO2017043496A1 | ||||
| WO2007108363A1 |
Attorney, Agent or Firm:
Koichiro Tsujimaru
Masato Matsunawa
Isaji Sou
Shuo An
Masato Matsunawa
Isaji Sou
Shuo An