1. A heat-sensitive recording material comprising:
a substrate;
a heat-sensitive color-developing layer over the substrate, the heat-sensitive color-developinglayer containing a leuco dye and a developer;
a first protective layer over the heat-sensitive color-developing layer, the first protective layer containing a water-soluble resin and a crosslinking agent; and
a second protective layer over the first protective layer, the second protective layer containing a water-soluble resin, a crosslinking agent and a pigment,
wherein the heat-sensitive color-developing layer, the first protective layer and the second protective layer are formed simultaneously by curtain coating method, and the second protective layer contains diacetone-modified polyvinyl alcohol and maleic acid copolymer resin, and
wherein the maleic acid copolymer resin in the second protective layer is a water-soluble salt of a diisobutylene-maleic acid anhydride copolymer.
2. The heat-sensitive recording material according to claim 1, wherein the water-soluble resin in the first protective layer is diacetone-modified polyvinyl alcohol and the first protective layer contains acrylic resin or maleic acid copolymer resin.
3. The heat-sensitive recording material according to claim 2, wherein the maleic acid copolymer resin in the first protective layer is a water-soluble salt of a diisobutylenemaleic acid anhydride copolymer.
4. The heat-sensitive recording material according to claim 2, wherein the acrylic resin in the first protective layer is an aqueous solution of an acrylic cation polymer.
5. The heat-sensitive recording material according to claim 1, wherein the second protective layer contains at least one of aluminum hydroxide and calcium carbonate as a basic filler.
6. The heat-sensitive recording material according to claim 1, wherein the second protective layer contains silicone resin particles.
7. The heat-sensitive recording material according to claim 1, further comprising a under layer provided between the substrate and the heat-sensitive color-developing layer, wherein the under layer contains plastic hollow particles having an average particle diameter of 2 \u03bcm to 5 \u03bcm and a hollow ratio of 80% to 95%.
8. The heat-sensitive recording material according to claim 1, further comprising a back layer on a back surface of the substrate, wherein the back layer contains a pigment, a water-soluble resin and a crosslinking agent.
9. The heat-sensitive recording material according to claim 8, further comprising an adhesive layer and separation paper sequentially provided over a surface of the back layer or the back surface of the substrate.
10. The heat-sensitive recording material according to claim 8, further comprising a heat-sensitive adhesive layer provided over a surface of the back layer or the back surface of the substrate, wherein the heat-sensitive adhesive layer exerts adhesiveness upon heated.
11. The heat-sensitive recording material according to claim 8, further comprising a magnetic recording layer provided over a surface of the back layer or the back surface of the substrate.
12. The heat-sensitive recording material according to claim 1, wherein the first protective layer contains a water-soluble salt of an ethyleneacrylic acid copolymer.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An optical film comprising a first transparent protective film, a polarizer, a second transparent protective film, and a birefringent layer having a relationship of nx>ny=nz and positive uniaxial property in the stated order, wherein
the second transparent protective film has a thickness direction retardation (Rth) represented by the formula (1) of 10 nm or less
Rth=(nx\u2212nz)\xd7d\u2003\u2003(1);
d (nm) represents a thickness of the second transparent protective film;
nx refers to a refractive index in a direction providing a maximum in-pane refractive index (a slow axis direction);
ny refers to a refractive index in a direction perpendicular to the slow axis in the same plane (a fast axis direction);
nz refers to a refractive index in a thickness direction.
2. An optical film according to claim 1, wherein the first transparent protective film comprises any one of a cellulose-based film and a norbornene-based film.
3. An optical film according to claim 1, wherein the second transparent protective film has a thickness direction retardation (Rth) of 6 nm or less.
4. An optical film according to claim 1, wherein the second transparent protective film has a thickness direction retardation (Rth) of 3 nm or less.
5. An optical film according to claim 1, wherein the second transparent protective film has an in-plane retardation (\u0394nd) represented by the formula (2) of 2 nm or less
\u0394nd=(nx\u2212ny)\xd7d\u2003\u2003(2)
6. An optical film according to claim 5, wherein the second transparent protective film has an in-plane retardation (\u0394nd) of 1 nm or less.
7. An optical film according to claim 1, wherein the second transparent protective film comprises a cellulose-based film.
8. An optical film according to claim 1, wherein an absorption axis of the polarizer and a slow axis of the birefringent layer are substantially perpendicular to each other.
9. An optical film according to claim 1, wherein the birefringent layer comprises a \u03bb4 plate.
10. An optical film according to claim 1, wherein the birefringent layer has an absolute value of difference between in-plane retardation (\u0394nd) and thickness direction retardation (Rth) of 10 nm or less.
11. An optical film according to claim 1, wherein the birefringent layer comprises a resin having an absolute value of photoelastic coefficient of 2\xd710\u221211 m2N or less.
12. An optical film according to claim 11, wherein the resin comprises a cyclic olefin-based resin.
13. A liquid crystal panel comprising: a liquid crystal cell; and the optical film according to claim 1 which is arranged on one side of the liquid crystal cell.
14. A liquid crystal panel according to claim 13, wherein the liquid crystal cell is of one of VA mode and OCB mode.
15. A liquid crystal panel according to claim 13, wherein:
the liquid crystal cell includes the optical film according to claim 1 arranged on a viewer side; and
the liquid crystal cell includes a birefringent layer having a relationship of nx\u2267ny>nz arranged on a backlight side.
16. A liquid crystal panel according to claim 15, wherein the birefringent layer having a relationship of nx\u2267ny>nz is formed of a non-liquid crystalline material.
17. A liquid crystal panel according to claim 16, wherein the non-liquid crystalline material comprises at least one selected from the group consisting of polyamide, polyimide, polyester, polyetherketone, polyamideimide, and polyesterimide.
18. A liquid crystal display apparatus comprising the liquid crystal panel according to claim 13.