Laminate and image display device
The present invention provides: a laminate which has excellent moisture-heat resistance and includes a light-absorbing anisotropic layer sandwiched between pressure sensitive adhesive layers; and an image display device using the same. The laminate includes a pressure sensitive adhesive layer, a light-absorbing anisotropic layer, and a pressure sensitive adhesive layer in this order, in which the light-absorbing anisotropic layer contains an organic dichroic substance, a thickness of the light-absorbing anisotropic layer is 5 μm or less, the pressure sensitive adhesive layer and the pressure sensitive adhesive layer are each a pressure sensitive adhesive layer at a closest position as viewed from the light-absorbing anisotropic layer in the laminate, and H represented by Expression (I) is 10.0 or less. H=(thickness of pressure sensitive adhesive layer+thickness of pressure sensitive adhesive layer)/total thickness of layers on inner side than pressure sensitive adhesive layer and pressure sensitive adhesive layer.
1. A laminate comprising, in the following order:
a pressure sensitive adhesive layer 1 ;
a light-absorbing anisotropic layer;
a pressure sensitive adhesive layer 2 ; and
an optically anisotropic layer,
wherein the light-absorbing anisotropic layer contains an organic dichroic substance,
a thickness of the light-absorbing anisotropic layer is 5 μm or less,
the pressure sensitive adhesive layer 1 and the pressure sensitive adhesive layer 2 are each a pressure sensitive adhesive layer at a closest position as viewed from the light-absorbing anisotropic layer in the laminate, and
H represented by Expression (I) is 10.0 or less,
H =(thickness of pressure sensitive adhesive layer 1+thickness of pressure sensitive adhesive layer 2)/total thickness of layers on inner side than pressure sensitive adhesive layer 1 and pressure sensitive adhesive layer 2 Expression (I).
2. The laminate according to claim 1 ,
wherein H represented by Expression (I) is 6.0 or less.
3. The laminate according to claim 1 ,
wherein H represented by Expression (I) is 4.0 or less.
4. The laminate according to claim 1 ,
wherein a storage elastic modulus of at least one of the pressure sensitive adhesive layer 1 or the pressure sensitive adhesive layer 2 is 0.1 MPa or greater.
5. The laminate according to claim 4 ,
wherein the storage elastic moduli of both the pressure sensitive adhesive layer 1 and the pressure sensitive adhesive layer 2 are each 0.1 MPa or greater.
6. The laminate according to claim 4 ,
wherein the storage elastic modulus of at least one of the pressure sensitive adhesive layer 1 or the pressure sensitive adhesive layer 2 is 0.5 MPa or greater.
7. The laminate according to claim 6 ,
wherein the storage elastic modulus of the pressure sensitive adhesive layer 1 is 0.5 MPa or greater.
8. The laminate according to claim 6 ,
wherein the storage elastic moduli of both the pressure sensitive adhesive layer 1 and the pressure sensitive adhesive layer 2 are each 0.5 MPa or greater.
9. The laminate according to claim 1 ,
wherein the thickness of the pressure sensitive adhesive layer 1 is 8 μm or less.
10. The laminate according to claim 1 ,
wherein the thickness of the light-absorbing anisotropic layer is 0.8 μm or less.
11. The laminate according to claim 1 ,
wherein at least one of the pressure sensitive adhesive layer 1 or the pressure sensitive adhesive layer 2 contains a polymer having a repeating unit represented by Formula (A),
in Formula (A), R 1 represents a hydrogen atom or a methyl group, and R 2 represents an alkyl group having 1 to 6 carbon atoms.
12. The laminate according to claim 1 ,
wherein the pressure sensitive adhesive layer 1 , the light-absorbing anisotropic layer, a curing-type adhesive layer, an optically anisotropic layer, and the pressure sensitive adhesive layer 2 are provided in this order.
13. The laminate according to claim 1 ,
wherein the pressure sensitive adhesive layer 1 , an oxygen shielding layer, a cured layer, the light-absorbing anisotropic layer, a curing-type adhesive layer, an optically anisotropic layer, and the pressure sensitive adhesive layer 2 are provided in this order.
14. The laminate according to claim 13 ,
wherein the pressure sensitive adhesive layer 1 , the oxygen shielding layer, the cured layer, the light-absorbing anisotropic layer, the curing-type adhesive layer, the optically anisotropic layer, and the pressure sensitive adhesive layer 2 are adjacently provided in this order.
15. The laminate according to claim 13 ,
wherein the curing-type adhesive layer is an ultraviolet ray curing-type adhesive layer.
16. The laminate according to claim 1 , further comprising:
a surface protective layer which is provided on a side of the pressure sensitive adhesive layer 1 opposite to a side where the light-absorbing anisotropic layer is provided.
17. An image display device comprising:
the laminate according to claim 1 ; and
an image display element,
wherein the image display element is disposed on a side of the pressure sensitive adhesive layer 2 opposite to a side where the light-absorbing anisotropic layer is provided.
18. The image display device according to claim 17 ,
wherein the image display element is an organic EL display element.
19. The laminate according to claim 2 ,
wherein H represented by Expression (I) is 4.0 or less.
20. The laminate according to claim 2 ,
wherein a storage elastic modulus of at least one of the pressure sensitive adhesive layer 1 or the pressure sensitive adhesive layer 2 is 0.1 MPa or greater.
21. A laminate comprising, in the following order:
a pressure sensitive adhesive layer 1 ;
a light-absorbing anisotropic layer;
a curing-type adhesive layer;
an optically anisotropic layer; and
a pressure sensitive adhesive layer 2 ,
wherein the light-absorbing anisotropic layer contains an organic dichroic substance,
a thickness of the light-absorbing anisotropic layer is 5 μm or less,
the pressure sensitive adhesive layer 1 and the pressure sensitive adhesive layer 2 are each a pressure sensitive adhesive layer at a closest position as viewed from the light-absorbing anisotropic layer in the laminate, and
H represented by Expression (I) is 10.0 or less,
H =(thickness of pressure sensitive adhesive layer 1+thickness of pressure sensitive adhesive layer 2)/total thickness of layers on inner side than pressure sensitive adhesive layer 1 and pressure sensitive adhesive layer 2 Expression (I).