Nitto-denko Corporation

Kunio Nagasaki

Masayuki Hodono

Kohei Doi

Miho Yamaguchi

Shinji Inokuchi

Kazuhisa Maeda

Yusuke Sugino

Takafumi Hida

Takami Hikita

Keisuke Hirano

Yusuke Nakayama

Shuzo Fujiwara

Kazuyuki Kiuchi

Isao Hirose

Akira Hirao

Yoshinari Takayama

Kiichiro Matsushita

Daisuke Kitagawa

Kazumichi Kato

Kenichi Tagawa

Eiichi Imoto

Ryoichi Matsushima

Michirou Kawanishi

Kaoru Aizawa

Tetsuo Kishimoto

Kiyohiro Kamei

Hideyuki Tokuyama

Mika Okada

Yoshinori Yoshida

Akinori Nishio

Tetsuya Otsuka

Hidenori Suzuki

Susumu Kiyohara

Tadao Takahashi

Toshio Uota

Tsunaki Kitahara

Akira Shoji

Kyoichi Araki

Eiji Yamanaka

Tooru Nakashima

Kazyuki Kuichi

A foamed sheet according to the present invention has a thickness of 30 to 500 &#x3bc;m and includes a foam. The foam has a density of 0.2 to 0.7 g/cm, an average cell diameter of 10 to 150 &#x3bc;m, and a peak top of loss tangent (tan &#x3b4;) occurring in a temperature range of from &#x2212;30&#xb0; C. to 30&#xb0; C., where the loss tangent is defined as the ratio of a loss modulus to a storage modulus determined at an angular frequency of 1 rad/s in dynamic viscoelastic measurement of the foam. The foam preferably has a maximum of the loss tangent (tan &#x3b4;) in the temperature range of from &#x2212;30&#xb0; C. to 30&#xb0; C. of 0.2 or more.

Foamed sheet

There is provided a flame-resistant composite member exhibiting remarkably high flame resistance even if having a flammable base material. The flame-resistant composite member according to the present invention has a film formed of a silicone resin composition (C) containing at least an inorganic oxide particle-containing condensation-reactive silicone resin on at least one surface of a base material. The inorganic oxide particle-containing condensation-reactive silicone resin may be a condensation-reactive silicone resin (A) including a crosslinked structural body wherein an inorganic oxide particle dispersed in a polysiloxane resin having a condensation-reactive group and the polysiloxane resin are crosslinked through a chemical bond. The silicone resin composition (C) may contain the condensation-reactive silicone resin (A) and an inorganic particle (B).

Flame-resistant composite member

The flame-retardant silicone resin composition of the present invention comprises: an inorganic oxide particle-containing condensation-reactive silicone resin (A) comprising a crosslinking structure in which inorganic oxide particles dispersed in a polysiloxane resin having a condensation-reactive group are crosslinked with the polysiloxane resin by chemical bonds; and inorganic particles (B). The inorganic oxide particles are preferably at least one type of inorganic oxide particles selected from the group consisting of silica, alumina, glass frit, and antimony-doped tin oxide.

Flame-retardant silicone resin composition and flame-retardant silicone resin sheet

The present invention provides a thermally-conductive sheet excellent in heat dissipation properties. The thermally-conductive sheet includes a polymer matrix and a thermally-conductive filler dispersed in the polymer matrix. The present invention is a thermally-conductive sheet including a polymer matrix and non-spherical particles of a thermally-conductive filler that are dispersed in the polymer matrix. At least a part of the thermally-conductive filler particles are oriented in a thickness direction of the sheet. When a portion of the sheet where the thermally-conductive filler particles have the highest degree of orientation in the thickness direction of the sheet is defined as a center of orientation, and an axis passing through the center of orientation and perpendicular to sheet surfaces is defined as a central axis of orientation, the thermally-conductive sheet has a region where the thermally-conductive filler particles are oriented toward one point on the central axis of orientation and where the degree of orientation of the thermally-conductive filler particles in the thickness direction of the sheet decreases from the center of orientation toward a periphery of the sheet.

Thermally-conductive sheet, LED mounting substrate, and LED module

The present invention relates to a photocurable acrylic viscoelastic material composition including: an acrylic monomer mixture containing an alkyl (meth)acrylate as a main monomer component and a polar group-containing vinyl monomer, or a partial polymerization product thereof; a (meth)acrylate compound having at least one isocyanate group within the molecule thereof; and a photopolymerization initiator. The photocurable acrylic viscoelastic material composition of the present invention has, by virtue of the above-described construction, excellent pot life and excellent storage stability, despite containing an isocyanate compound having at least one isocyanate group within the molecule thereof, and further can form an acrylic viscoelastic material excellent in the holding power at high temperatures through photocuring. Also, the acrylic viscoelastic material and acrylic viscoelastic material layer tape or sheet of the present invention is excellent in the holding power at high temperatures.

Photocurable acrylic viscoelastic material composition, acrylic viscoelastic material, acrylic viscoelastic material layer tape or sheet and proceed for producing the same

Provided is a viscoelastic article which exerts different properties between one surface and the other surface thereof, which has a transparent appearance, and which less causes staining of objects to which the viscoelastic article is adopted. The viscoelastic article is an article having a multilayer structure including a polymer layer, and a monomer-absorptive layer capable of absorbing at least one of monomer component(s) constituting the polymer, in which the polymer layer is a polymer layer containing an elastomer unevenly distributed and enriched at an interface, or in the vicinity thereof, opposite to the monomer-absorptive layer. The vicinity of the interface opposite to the monomer-absorptive layer is preferably a region ranging from the interface opposite to the other interface with the monomer-absorptive layer and occupying, in a thickness direction, 50% or less of the total thickness.

Viscoelastic articles with polymer layer containing elastomer unevenly distributed

An optical waveguide film includes a clad layer having an adhesive function; and a core layer covered by the clad layer.

Methods of manufacturing optical waveguide film and optical substrate

Optical substrate having a supporting substrate and an optical waveguide film adhesively bonded to the supporting substrate

The present invention relates to a process for producing a pressure-sensitive adhesive layer, which includes irradiating a photopolymerizable acrylic pressure-sensitive adhesive composition layer provided between two films with an active energy beam to polymerize the photopolymerizable acrylic pressure-sensitive adhesive composition layer, in which the polymerization is performed while a layer of a composition for preventing polymerization inhibition which is curable with an active energy beam in the atmosphere is provided on a side surface of the photopolymerizable acrylic pressure-sensitive adhesive composition layer. According to the process for producing a pressure-sensitive adhesive layer of the present invention, owing to the construction as discussed above, it is possible to reuse a film. Moreover, it is possible to prevent a lowering in the cohesive force in the side surface of the thus formed pressure-sensitive adhesive composition layer caused by a lowering in the polymerization degree in the side surface of the photopolymerizable acrylic pressure-sensitive adhesive composition layer during the photopolymerization.

Process for producing pressure-sensitive adhesive layer

The present invention relates to a self-rolling pressure-sensitive adhesive sheet, including a shrinkable film layer; a restriction layer disposed on a side of the shrinkable film layer; and a pressure-sensitive adhesive layer disposed on the side of the restriction layer which is opposite to the side on which the shrinkable film layer is disposed. The self-rolling pressure-sensitive adhesive sheet is a releasable pressure-sensitive adhesive sheet, in which the pressure-sensitive adhesive layer or the pressure-sensitive adhesive layer after an adhesiveness decreasing treatment has a pressure-sensitive adhesive power (180&#xb0; C. peeling, against a silicon mirror wafer, tensile speed: 300 mm/min) of 6.5 N/10 mm or less, and in which the self-rolling pressure-sensitive adhesive sheet rolls up in one direction from an end to form one tubular roll or rolls up from two opposing ends toward a center of the two opposing ends to form two tubular rolls, when the self-rolling pressure-sensitive sheet is stimulated to induce the contraction of the shrinkable film layer.

Self-rolling laminated sheet and self-rolling pressure-sensitive adhesive sheet

An optical waveguide film includes a film including a clad layer and a core layer covered by the clad layer; and an adhesive layer formed at least on one surface of the film, having a rough structured surface having an arithmetic mean surface roughness of 0.1 to 2.0 &#x3bc;m, and having a storage modulus at 25&#xb0; C. of 10 to 100 MPa obtained by dynamic viscoelastic measurement in torsion mode with a frequency of 1 Hz.

Optical waveguide film and manufacturing method thereof

Optical waveguide film, optical substrate, and methods for manufacturing the same

An optical waveguide film includes a film including a clad layer and a core layer covered by the clad layer; an adhesive layer formed on at least one surface of the film; and a plurality of projection portions formed on a surface of the adhesive layer and arranged at spaced intervals to one another.

A method and an apparatus for producing an adhesive tape are disclosed in which an adhesive tape is produced while a liquid reservoir is almost hermetically sealed by bringing a blade into contact with an upper laminate roller, and supplement of adhesive to the liquid reservoir is controlled so that the liquid surface of the adhesive reserved in the liquid reservoir comes into contact with the back face of the blade.

Method and apparatus for producing adhesive tape, and adhesive tape

An electronic component carrier includes an elongated substrate having a series of electronic component-setting portions spaced from one another at a predetermined interval along the length of the substrate. The substrate has push bar-insertion holes formed therethrough and disposed respectively at the electronic component-setting portions. Adhesive layers are formed respectively on surfaces of the electronic component-setting portions. The electronic components are adapted to be bonded respectively to the electronic component-setting portions through the adhesive layers. A push bar is adapted to be inserted into the push bar-insertion hole so as to be engaged with the electronic component to release the same from the adhesive layer.

Electronic component carrier

Growing community of inventors

Osaka, Japan

Kunio Nagasaki