TRANSPARENT CONDUCTIVE FILM, AND TOUCH PANEL INCLUDING SAME
Provided is a transparent conductive film having a preferable optical property and an electric property, and in addition, a superior durability of folding. A transparent conductive film comprising: a transparent substrate, a transparent conductive layer having a binder resin and conductive fibers and formed on at least one of the main faces of the transparent substrate, and a protective layer formed on the transparent conductive layer, wherein the protective layer is a cured layer of a curable resin composite and has a thickness of more than 100 nm and 1 μm or less.
1 . A transparent conductive film comprising:
a transparent substrate,
a transparent conductive layer having a binder resin and conductive fibers and formed on at least one of the main faces of the transparent substrate, and
a protective layer formed on the transparent conductive layer,
wherein the protective layer is a cured layer of a curable resin composite and has a thickness of more than 100 nm and 1 μm or less.
2 . A transparent conductive film according to claim 1 , wherein the conductive fiber is a metal nanowire.
3 . A transparent conductive film according to claim 2 , wherein the metal nanowire is a silver nanowire.
4 . A transparent conductive film according to claim 1 , wherein the protective layer is a thermally cured layer of a curable resin composite containing (A) polyurethane containing a carboxy group, (B) an epoxy compound, and (C) a curing accelerator.
5 . A transparent conductive film according to claim 1 , wherein the binder resin is soluble in alcohol, water, or a mixed solvent of alcohol and water.
6 . A transparent conductive film according to claim 5 , wherein the binder resin contains poly-N-vinylpyrrolidone, water-soluble cellulose-based resin, butyral resin, or poly-N-vinylacetamide.
7 . A transparent conductive film according to claim 1 , wherein the transparent substrate is a cycloolefin polymer (COP) film.
8 . A transparent conductive film according to claim 7 , wherein the COP film has a thickness of 5 to 20 μm.
9 . A transparent conductive film according to claim 7 , wherein the COP film has a glass transition temperature (Tg) is 90 to 170° C.
10 . A transparent conductive film according to claim 7 , wherein the COP film has a glass transition temperature (Tg) of 125 to 145° C.
11 . A transparent conductive film according to claim 1 , wherein the protective layer has a thickness of more than 100 nm and 200 nm or less.
12 . A transparent conductive film according to claim 1 , wherein the protective layer has a thickness of more than 100 nm and 120 nm or less.
13 . A transparent conductive film according to claim 1 , wherein a content of an aromatic ring-containing compound in the solid of the curable resin composite for forming the protective layer is 15% by mass or less.
14 . A transparent conductive film according to claim 1 , wherein, when a resistance value (R 0 ) and a resistance value (R) respectively represents resistance values of the transparent conductive layer before and after 200,000 times of folding tests using a clamshell type durability tester in which the curvature radius is set to 1 mm, the ratio (R/R 0 ) is 2.0 or less.
15 . A touch panel including a transparent conductive film according to claim 1 .