Laminate and image display device
View Patent ↗A laminate including an optical film, a touch sensor layer, and a pressure-sensitive adhesive layer, the laminate being excellent in flexibility and high in response speed, is provided. A flexible laminate is provided, the flexible laminate including an optical film and a touch sensor layer including a transparent electrode layer, the flexible laminate being provided with a pressure-sensitive adhesive layer on a surface of the touch sensor layer opposite to the optical film, the flexible laminate satisfying conditions of surface resistance of the transparent electrode layer being ≤90 Ω/□, relative permittivity of the pressure-sensitive adhesive layer at a frequency of 100 kHz being ≤4.5, and 5 μm≤a thickness of the pressure-sensitive adhesive layer≤90 μm.
1. A laminate comprising:
an optical film;
a touch sensor layer including a translucent electrode layer; and
a pressure-sensitive adhesive layer being provided on a surface of the touch sensor layer opposite to the optical film,
the laminate satisfying expressions (1) to (3):
surface resistance of the translucent electrode layer ≤90 Ω/□ (1)
relative permittivity of the pressure-sensitive adhesive layer at a frequency of 100 kHz≤3.5 (2)
5 μm≤a thickness of the pressure-sensitive adhesive layer ≤50 μm (3).
2. The laminate according to claim 1 , further comprising a front plate arranged on a side of the optical film opposite to the touch sensor layer.
3. The laminate according to claim 1 , wherein the optical film includes a circular polarization plate.
4. The laminate according to claim 1 , further comprising an organic EL display element arranged on a side of the pressure-sensitive adhesive layer opposite to the touch sensor layer.
5. The laminate according to claim 1 , wherein the touch sensor layer includes a capacitance coupling type touch sensor panel.
6. An image display device comprising the laminate according to claim 1 .
7. The laminate according to claim 1 , wherein the relative permittivity of the pressure-sensitive adhesive layer at a frequency of 100 kHz is higher than 1.0 and not higher than 2.5.
8. The laminate according to claim 2 , wherein the optical film includes a circular polarization plate.
9. The laminate according to claim 8 , further comprising an organic EL display element arranged on a side of the pressure-sensitive adhesive layer opposite to the touch sensor layer.
10. The laminate according to claim 9 , wherein the touch sensor layer includes a capacitance coupling type touch sensor panel.
11. An image display device comprising the laminate according to claim 10 .