Nitto-denko Corporation

Tomohide Banba

Hiroaki Kishioka

Tomotake Nashiki

Hideo Sugawara

Tsuyoshi Chiba

Masahiro Ooura

Mitsuhiro Kanada

Takahiro Nonaka

Yoshihiro Minamizaki

Kazuhiro Nakajima

Shou Takarada

Amane Mochizuki

Masayuki Satake

Makoto Kai

Hiroshi Wada

Katsuya Kume

Mitsuru Honjo

Takami Hikita

Shinichi Inoue

Takayuki Yamamoto

Kazumasa Igarashi

Masayuki Okamoto

Hirofumi Katami

Masahito Niwa

Tomohiro Taruno

Isao Hirose

Toshiyuki Umehara

Katsuhiko Kamiya

Natsuki Kobayashi

Naoki Nagaoka

Junichi Sekiya

Mami Ikeya

Hiroaki Fumoto

Yuki Hasegawa

Daisuke Kajihara

Masato Fujita

Yuki Tsubaki

Miki Tanimura

Yasushi Buzoujima

Shinpei Yakuwa

Provided is a capacitive touch panel which has enhanced sensitivity and is usable in an image display panel, etc. in this capacitive touch panel, a window, a first transparent film having a first transparent conductive electrode pattern formed on one surface thereof, and a second transparent film having a second transparent conductive electrode pattern which is formed on one surface thereof and disposed with respect to the first transparent film in such a manner as to allow a capacitance to be formed therebetween, are stacked in turn. The capacitive touch panel comprises a first transparent inter-layer resin provided between the window and the first transparent film, and a second transparent inter-layer resin provided between the first transparent film and the second transparent film, wherein the first transparent inter-layer resin has a dielectric constant greater than that of the second transparent inter-layer resin.

Capacitive touch panel

The present invention provides an excellent optical pressure-sensitive adhesive sheet having an excellent adhesion property to an optical member. The present invention relates to an optical pressure-sensitive adhesive sheet comprising a pressure-sensitive adhesive layer, wherein a relative dielectric constant at a frequency of 1 MHz is 5 to 10, and an adhesion strength to a glass, which is measured with a peel angle of 180&#xb0; and a tensile speed of 300 mm/min after 30 min of laminating the optical pressure-sensitive adhesive sheet to the glass, is 3 N/20 mm to 15 N/20 mm.

Optical pressure-sensitive adhesive sheet, liquid crystal display and input device comprising the same

Provided is an optical unit for a display panel device with a capacitive touch input function. In the optical unit, a touch panel laminate comprises: an optically transparent first substrate layer laminated to one surface of a transparent adhesive layer; a first transparent electrically conductive layer laminated, through a first undercoat layer, to a surface of the first substrate layer on a side opposite to the adhesive layer; an optically transparent second substrate layer laminated to the other surface of the adhesive layer; and a second transparent electrically conductive layer laminated, through a second undercoat layer, to a surface of the second substrate layer on a side opposite side to the adhesive layer.

Display panel device with touch input function, optical unit for said display panel device, and production method for same

A capacitive touch sensor laminate for use in a display panel device includes: a dielectric central substrate structure made of a transparent resin material and formed to have flat surfaces, respectively, on opposite sides thereof; a at least one-layer structured coat layer made of a transparent material, formed on each of the flat surfaces, and including at least one refractive index adjusting layer for suppressing visibility of an electrode pattern formed by the transparent electrically conductive layer; and a transparent electrically conductive layer formed on and in adjacent relation to the coat layer. The at least one-layer structured coat layers formed on respective ones of the flat surfaces are configured such that thicknesses of corresponding layers therein on respective opposite sides of the dielectric central substrate structure are set to allow the corresponding layers to become mutually symmetrical across the dielectric central substrate structure.

Capacitive touch sensor laminate for display panel device

A display panel device has a window, a touch panel laminate and a display panel. The touch panel laminate has: a transparent first substrate layer; a first transparent conductive layer laminated to the first substrate layer through a first undercoat layer; a transparent second substrate layer; and a second transparent conductive layer laminated to the second substrate layer through a second undercoat layer. The second conductive layer faces the first conductive layer through at least the first substrate layer and the first undercoat layer. The first conductive layer is closer to the window than the first substrate layer. A polarizing film layer is bonded to the window, and a &#x3bb;/4 retardation film layer is disposed between the polarizing film layer and the touch panel laminate. The display panel is disposed on a side opposite to the window with respect to the touch panel laminate.

Display panel device having touch input function

The present invention provides an optical-use pressure-sensitive adhesive sheet, which includes a pressure-sensitive adhesive layer containing a polymer formed of one or more monomer ingredients containing, as an indispensable monomer ingredient, a monomer of which homopolymer has a glass transition temperature of not lower than &#x2212;10&#xb0; C., said sheet having a moisture content of at least 0.65% by weight after stored in an environment at 60&#xb0; C. and 95% RH for 120 hours. The pressure-sensitive adhesive layer is preferably an acrylic pressure-sensitive adhesive layer.

Optical-use pressure-sensitive adhesive sheet

The invention provides an inorganic powder-containing resin composition capable of forming a dielectric layer having high light transmittance and excellent in surface smoothness. The invention also provides a film-forming material layer, a transfer sheet and a dielectric layer, which comprise the composition, a method of producing a substrate having a dielectric layer formed thereon, and a substrate having a dielectric layer formed thereon. The inorganic powder-containing resin composition comprises inorganic powder, a binder resin, and a phosphorus compound represented by formula (1): wherein R, Rand Rindependently represent H, an alkyl group, an alkylaryl group, NH(ammonium) or &#x2014;(CHCHO)&#x2014;R, wherein n is 1 to 15, and Rrepresents H, an alkyl group, an alkylaryl group or a (meth)acryloyl group.

Inorganic powder-containing resin composition, a film-forming material layer, a transfer sheet, method of producing a substrate having a dielectric layer formed thereon, and a substrate having a dielectric layer formed thereon

A pressure sensitive adhesive optical film with a pressure sensitive adhesive layer laminated on at least one surface of an optical film, wherein the pressure sensitive adhesive layer has a value of no more than 5 N/25 mm for a Pwhich is initial 90&#xb0; peel strength at 23&#xb0; C. and by a peeling speed of 300 mm/minute after an autoclave processing under a condition of 50&#xb0; C.&#xd7;5 atm&#xd7;15 minutes, and a ratio (P/P) of a Pto a Pis no less than 2, which Pis 90&#xb0; peel strength after heating by a peeling speed of 300 mm/minute and at 23&#xb0; C. after the pressure sensitive adhesive layer is given the above-mentioned autoclave processing and is furthermore given a heat-treatment at 80&#xb0; C. for 2 hours.

Pressure sensitive adhesive optical film and image viewing display

A heat-resistant polymer foam is disclosed which has excellent heat resistance, a fine cellular structure, and a low apparent density. The heat-resistant polymer foam comprises a heat-resistant polymer having a glass transition point of 120&deg; C. or higher, e.g., a polyimide or polyether imide, and has an average cell diameter of from 0.01 &mgr;m to less than 10 &mgr;m. This heat-resistant polymer foam can be produced by, for example, impregnating a heat-resistant polymer under pressure with an non-reactive gas such as carbon dioxide, which is in, e.g., a supercritical state, reducing the pressure, and then heating the polymer at a temperature exceeding 120&deg; C. to foam the polymer.

Heat-resistant polymer foam, process for producing the same, and foam substrate

A process for producing a natural rubber for a pressure-sensitive adhesive, which comprises decreasing a molecular weight of an unmasticated natural rubber by the action of a peptizing agent while dissolving the unmasticated natural rubber in an organic solvent, and a natural rubber-based pressure-sensitive adhesive composition comprising a natural rubber having a weigh average molecular weight Mw of 700,000 or less obtained by the process.

Process for producing natural rubber for pressure-sensitive adhesive and natural rubber-based pressure-sensitive adhesive composition

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Ibaraki, Japan

Tomohide Banba