Nitta Corporation

Other

Shinichi Inoue

Toshiaki Kasazaki

Shinichiro Kawahara

Masayoshi Yamamoto

Takashi Ando

Tomohiro Nishio

Naoyuki Tani

Ikuzo Usami

Takahiko Yoshida

Toshihiro Hirai

Tsutomu Ueda

Yasushi Kurita

Shoji Shimizu

Yasushi Kobuchi

Eiji Inoue

Yoko Onishi

Kiyotaka Nagai

Haruhiko Ito

Shinsuke Uegaki

Kenichi Horiuchi

The thermoplastic resin composition according to the present invention includes a thermoplastic resin (A), and a modified ethylene copolymer (B) dispersed and contained therein, wherein the modified ethylene copolymer (B) in the thermoplastic resin composition has an average dispersed particle aspect ratio of 1 to 3.5, and an average dispersed particle diameter of not more than 3 &#x3bc;m. The modified ethylene copolymer (B) is preferably a copolymer, modified with an unsaturated carboxylic acid or a derivative thereof, of ethylene with at least one monomer component selected from the group consisting of (i) olefin components except for ethylene, (ii) diene components and (iii) ester components having an ethylenically unsaturated group.

Thermoplastic resin composition having high durability

Rubber-like or rubber-like-material-containing articles contain or are made from hydrogenated natural polyisoprenoids or modified products thereof. These rubber-like or rubber-like-material-containing articles include a rubber-like elastic article made from a hydrogenated natural polyisoprenoid or a modified product thereof. A polymer obtained by reacting a natural polyisoprenoid with hydrogen in a solvent in the presence of a hydrogenation catalyst, for example, can be used as the hydrogenated natural polyisoprenoid. The hydrogenated natural polyisoprenoid preferably has a degree of hydrogenation of 50% or more. The hydrogenated natural polyisoprenoid preferably has a weight-average molecular weight of 20&#xd7;10or more and a molecular-weight distribution of 2.0 or more. The rubber-like or rubber-like-material-containing articles have excellent heat resistance and weather resistance, and are also excellent in view of resources and environment, because they use plant-derived raw materials.

Rubber-like articles and rubber-like material-containing articles

A separator that is excellent in workability and corrosion resistance, and allows a reduction in the number of constituent components of a fuel cell and the number of manufacturing process steps, and a manufacturing method therefore are provided. A separator includes a separating section for achieving separation between a hydrogen gas channel and an oxygen gas channel, and a sealing section disposed along an outer periphery of the separator, for preventing leakage of hydrogen and oxygen gases. The separating section and the sealing section are formed integrally with each other by means of plastic deformation processing, e.g., press working, of a metal thin sheet. A coating layer is formed n the metal thin sheet to coat the metal thin sheet's surface, and a DC power generated at an interface between a high polymer membrane and a catalytic electrode on contact of the coating layer with the catalytic electrode is taken out as a DC current and is collected at a power collector plate after passing through an interior of the separator. A high polymer elastic layer is provided at the part contacting the high polymer membrane of a sealing projection of the sealing section. The polymer elastic layer contacts the polymer film to seal.

Fuel cell separator that is excellent in workability and corrosion resistance

A wafer retainer includes: a foam layer capable of adsorbing a wafer on a surface thereof in a detachable manner; a first pressure-sensitive adhesive layer formed on a back face of the foam layer; a support formed on a back face of the first pressure-sensitive adhesive layer; a second pressure-sensitive adhesive layer formed on a back face of the support for adhering to a base plate of a polishing machine; and a release sheet releasably attached to the second pressure-sensitive adhesive layer. The second pressure-sensitive adhesive layer includes an adhesive composition. The adhesive composition contains a pressure-sensitive adhesive and a side-chain crystallizable polymer so that the side-chain crystallizable polymer is present in an amount of about 1% to about 30% by weight based on the adhesive composition. The side-chain crystallizable polymer includes as a main component thereof an acrylic acid ester and/or methacrylic acid ester which has a straight-chain alkyl group including 16 or more carbon atoms as a side-chain.

Wafer retainer and method for attaching/detaching the wafer retainer to/from polishing machine base plate

An adhesive tape for temporary attachment of green sheets for a ceramic electronic device includes a substrate film and an adhesive layer provided on at least one face of the substrate film. The adhesive layer is composed of an adhesive composition, the adhesive composition containing a side-chain crystallizable polymer, wherein the side-chain crystallizable polymer contains as a component an acrylic acid alkyl ester and/or a methacrylic acid alkyl ester which has a straight-chain alkyl group including 16 or more carbon atoms as a side chain, the side-chain crystallizable polymer having a first-order melting transition occurring in a temperature range narrower than about 35&deg; C., and wherein the adhesive layer has a modulus of elasticity of about 5&times;10 Pa to about 1&times;10 Pa. An adhesive tape for temporary attachment of green sheets for ceramic electronic devices can be provided such that a large adhesion strength is obtained when temporarily attaching a laminate of green sheets, and that when a work is to be removed, peeling can easily occur without contaminating the work.

Adhesive tape for temporary-attachment of green sheets for ceramic electronic devices and method for producing ceramic electronic devices

A polishing cloth includes: a polishing cloth substrate; a first-pressure adhesive layer formed on a back face of the polishing cloth substrate; as support formed on a back face of the first pressure-sensitive adhesive layer; a second pressure-sensitive adhesive layer formed on a back face of the support; and a release sheet releasably attached to the second pressure-sensitive adhesive layer. The second pressure-sensitive adhesive layer includes an adhesive composition. The adhesive composition contains a pressure-sensitive adhesive and a side-chain crystallizable polymer so that the side-china crystallizable polymer is present in an amount of about 1% to about 30% by weight based on the adhesive composition. The side-chain crystallizable polymer includes as a main component thereof an acrylic acid ester and/or methacrylic acid ester which has a straight-chain alkyl group including 16 or more carbon atoms as a side chain.

Polishing cloth and method for attaching/detaching the polishing cloth to/from polishing machine base plate

A polyurethane elastomer actuator comprising a polyurethane elastomer 1 capable of deforming due to the orientation by an electric field, wherein the shrinkage displacement occurring at the time of the application of an electric field is transformed into other displacement. This polyurethane elastomer actuator does not require electrolyte and high voltage. Since it is not accompanied by chemical reactions and heat generation, its durability hardly deteriorates. This actuator deforms largely during driving.

Polyurethane elastomer actuator

Growing community of inventors

Yamatokohriyama, Japan

Toshiaki Kasazaki