Daicel Corporation

Mitsubishi Electric Corporation

Takahiro Sakakibara

Kouichi Umemoto

Masashi Yokoyama

Yasunori Nagakura

Hiroki Kageyama

Katsuya Harada

Ryouta Kojima

Eiji Tsuzuki

Hiroaki Ushida

Kazuma Shioda

Keishi Matsunaga

An anti-reflection film (X) includes a laminated structure including a substrate (), a hard coat layer (), and an anti-reflection layer (), and a luminous reflectance of the anti-reflection layer () side is 2% or less. A minimum value of a mandrel diameter indicating the bending resistance is in a range of 6 mm or less in a bending test according to a cylindrical mandrel method in which the test piece of the anti-reflection film (X) is bent with the anti-reflection layer () side inward. Additionally or alternatively, a minimum value of the mandrel diameter indicating the bending resistance is in a range of 10 mm or less in a bending test according to a cylindrical mandrel method in which the test piece of the anti-reflection film (X) is bent with the anti-reflection layer () side outward. Such an anti-reflection film is suitable for achieving high bending resistance together with high anti-reflective properties.

Anti-reflection film

An anti-reflection film (X) of the present invention includes a laminated structure including a substrate (), a hard coat layer (), and an anti-reflection layer (), and a luminous reflectance of the anti-reflection layer () side is 2% or less. The anti-reflection layer () includes a surface () having a coefficient of kinetic friction of 0.3 or less and a coefficient of static friction of 0.3 or less. In addition, in the anti-reflection film (X), after a rubbing test performed on the surface () using steel wool #0000 as a rubbing material under conditions of a load of 200 g/cm, a rubbing stroke length of 10 cm, and reciprocations of 1000 times, a difference of the haze value (%) after the rubbing test from the haze value (%) before the rubbing test is 0.1 or less. Such an anti-reflection film is suitable for achieving high scratch resistance together with high anti-reflective properties.

A resin composition (X), which is a curable resin composition according to the present invention, contains a curable resin component (), a surface-modified nanodiamond (), and an organic medium. The surface-modified nanodiamond () includes a ND particle (), which is a nanodiamond particle, and a silane coupling agent (). The silane coupling agent () has a (meth)acryloyl-containing organic chain and is bonded to the ND particle (). The resin composition (X) is suitable for forming a nanodiamond-dispersed cured resin portion having both high transparency and high scratch resistance. An optical element according to the present invention has a light-transmitting region and includes a cured resin portion, which is a cured product of the resin composition (X), in at least part of the light-transmitting region. The optical element is advantageous for actually providing an optical element including a cured resin portion or cured resin layer having both high transparency and high scratch resistance.

Curable resin composition and optical member

A transparent layered film is produced by forming an anti-water-mark layer on a first side of a transparent resin layer and forming an uneven structure on a surface of the anti-water-mark layer, wherein the anti-water-mark layer comprises a cured product of a curable composition containing a curable resin, a thermoplastic resin, and a metal oxide particle having an average primary particle size of 1 to 100 nm, and the uneven structure has a roughness average Ra of not less than 0.005 and less than 0.03 &#x3bc;m, a mean spacing of profile irregularities Sm of 50 to 300 &#x3bc;m, an average absolute slope &#x394;a of less than 0.1&#xb0;, and a ten-point average roughness Rz of less than 0.2 &#x3bc;m. Lamination of the film on a glass-containing upper electrode of a touch screen display prevents scattering of glass fragments produced by breakage of the upper electrode, occurrence of water marks, and sparkling on a high-definition display provided with the film.

Transparent layered film, process for producing same, and electrode for touch panel

Growing community of inventors

Tokyo, Japan

Takahiro Sakakibara