Dai Nippon Printing Co., Ltd.

Natsuko Yamashita

Hiroko Suzuki

Mitsuru Tsuchiya

Norinaga Nakamura

Hiroomi Katagiri

Motohiro Oka

Yurie Ota

Toshio Yoshihara

Kiyotaka Takematsu

Hiroshi Yamada

Kiyotaka Takematus

An antireflection film containing a transparent substrate film, a hard coat layer on the substrate film, and first and second refractive index layers on the hard coat layer. The hard coat layer has a refractive index higher than the refractive index of the transparent substrate film; the first refractive index layer has a refractive index higher than the refractive index of the hard coat layer; the second refractive index layer has a refractive index lower than the refractive index of the hard coat layer.

Transparent functional membrane containing functional ultrafine particles, transparent functional film, and process for producing the same

A antiglare layer having a fine uneven surface is formed directly or through other layer(s) on a transparent substrate film and a layer having a low refractive index, which is lower than the refractive index of the antiglare layer is formed thereon. The refractive index of the antiglare layer is higher than the refractive index of a layer in contact with said antiglare layer on its surface remote from the layer having a low refractive index. An SiO film may be used as the layer having a low refractive index. The SiO film per se has excellent gas barrier property and antifouling property as an optical functional membrane and is an optical functional material characterized by having excellent moistureproofness, scratch resistance, adhesion to a substrate, transparency, low refractive index, dye deterioration preventive property, and other properties.

Optical functional materials and process for producing the same

A antiglare layer 12 having a fine uneven surface is formed directly or through other layer(s) on a transparent substrate film 11, and a layer 13 having a low refractive index, which is lower than the refractive index of the antiglare layer 12, is formed thereon. The refractive index of the antiglare layer 12 is higher than the refractive index of a layer in contact with said antiglare layer 12 on its surface remote from the layer 13 having a low refractive index. An SiO.sub.x film may be used as the layer 13 having a low refractive index. The SiO.sub.x film per se has excellent gas barrier property and antifouling property as an optical functional membrane and is an optical functional material characterized by having excellent moistureproofness, scratch resistance, adhesion to a substrate, transparency, low refractive index, dye, deterioration preventive property, and other properties. A layer 13 having a low refractive index as a surface layer is formed through other layer(s) on a transparent substrate film 11, and at least one of the other layer(s) is a hard coat layer 12 of 0.5 .mu.m or more in thickness, having a high refractive index, composed mainly of a resin. The hard coat layer 12 having a high refractive index is in direct contact with a layer 13 having a low refractive index. The refractive index of the hard coat layer 12 having a high refractive index is higher than the refractive index of a layer in contact with the hard coat layer 12 having a high refractive index on its surface remote from the layer 13 having a low refractive index. For use, the antireflection film is laminated to a polarizing plate or a liquid crystal display device.

The present invention provides a transparent functional film comprising a transparent plastic substrate film and a hard coat layer provided thereon, wherein functional ultrafine particles are present in a highly localized form, thereby enabling the functional ultrafine particles to effectively exhibit their function and, at the same time, the hard coat layer to have a good adhesion to the functional ultrafine particle layer; and also an antireflection film and processes for producing the transparent functional film and the antireflection film. A functional ultrafine particle layer 2 is formed on a release film 1. Separately, a resin composition for a hard coat layer is coated on a transparent plastic substrate film 3. The coated release film is laminated by press bonding to the coated transparent plastic substrate film so that the functional ultrafine particle layer 2 faces the resin composition coating, thereby causing part of the functional ultrafine particles 5 to be embedded in the resin composition coating for a hard coat layer. The resultant laminate is cured, and the release film 1 is then peeled off. In the resultant transparent functional film, the functional ultrafine particle layer 2 is partly embedded in and fixed to the hard coat layer 4, and the functional ultrafine particles 5 are localized in the hard coat layer 4 on its surface side.

Transparent functional membrane containing functional ultrafine

A antiglare layer 12 having a fine uneven surface is formed directly or through other layer(s) on a transparent substrate film 11, and a layer 13 having a low refractive index, which is lower than the refractive index of the antiglare layer 12, is formed thereon. The refractive index of the antiglare layer 12 is higher than the refractive index of a layer in contact with said antiglare layer 12 on its surface remote from the layer 13 having a low refractive index. An SiO.sub.x film may be used as the layer 13 having a low refractive index. The SiO.sub.x film per se has excellent gas barrier property and antifouling property as an optical functional membrane and is an optical functional material characterized by having excellent moistureproofness, scratch resistance, adhesion to a substrate, transparency, low refractive index, dye deterioration preventive property, and other properties. A layer 13 having a low-refractive index as a surface layer is formed through other layer(s) on a transparent substrate film 11, and at least one of the other layer(s) is a hard coat layer 12 of 0.5 .mu.m or more in thickness, having a high refractive index, composed mainly of a resin. The hard coat layer 12 having a high refractive index is in direct contact with a layer 13 having a low refractive index. The refractive index of the hard coat layer 12 having a high refractive index is higher than the refractive index of a layer in contact with the hard coat layer 12 having a high refractive index on its surface remote from the layer 13 having a low refractive index. For use, the antireflection film is laminated to a polarizing plate or a liquid crystal display device.

A transparent functional film comprising a transparent plastic substrate film and a hard coat layer provided thereon, wherein functional ultrafine particles are present in a highly localized form, thereby enabling the functional ultrafine particles to effectively exhibit their function and, at the same time, the hard coat layer to have a good adhesion to the functional ultrafine particle layer; and also an antireflection film and processes for producing the transparent functional film and the antireflection film.

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Tokyo-to, Japan

Natsuko Yamashita