Takagi Chemicals, Inc.

Toyota Boshoku Kabushiki Kaisha

Noriaki Takagi

Kazuo Matsuyama

Yuusuke Nagatani

Daisuke Watanabe

Masakuni Takagi

Yuuta Terao

Kazuyuki Hirata

Tatsuya Nagata

Yuki Wakimoto

Tsutomu Takeichi

Akihiko Matsumoto

A method for manufacturing a fuel cell separator includes heating a sheet, pressing the sheet using a first die, thereby forming the sheet so as to have a predetermined thickness, cooling, together with the first die, the sheet that has been formed so as to have the predetermined thickness, and pressing the sheet that has undergone the cooling using a second die, thereby forming a gas passage in the sheet. In the sheet, a content of a thermoplastic resin is greater than or equal to 20 weight percent and less than or equal to 30 weight percent and a content of the carbon material particles is greater than or equal to 70 weight percent and less than or equal to 80 weight percent. The heating the sheet includes heating the sheet to a temperature that is higher than a melting point of the thermoplastic resin.

Method for manufacturing fuel cell separator

A problem of heat dissipation in motors, converters, high-luminance LEDs, power devices, power supplies, and the like becomes significant. Provided is a means for capable of providing a product, which has favorable workability, segregation stability, storage stability, and the like, penetrates into a gap in a coil portion, an interface in casing, and the like without any gaps, enhances thermal conductivity/heat dissipation properties of a molded product thus obtained, and is excellent in electrical characteristics, toughness/elastic modulus, thermal resistance, thermal cycle properties, and the like, in the case of using the product for a cast molding resin, a potting material (sealing material), an adhesive, grease, and the like. Provided is a filler-loaded high thermal conductive dispersion liquid composition being formed by uniformly dispersing a powder composition, which contains organic polymer particles containing thermoplastic polymer particles, and high thermal conductive filler particles which contain filler particles having a graphite-like structure and is obtained by pulverizing 5 to 70 parts by weight of the organic polymer particles and 30 to 95 parts by weight of the high thermal conductive filler particles with respect to 100 parts by weight of the total amount of these components by using a pulverizing machine, which performs grinding with frictional force or impact force, to cause delamination or cohesive failure while maintaining an average planar particle size of the filler particles having a graphite-like structure, in the powder composition, the vicinity of the high thermal conductive filler particles being covered with the micronized organic polymer particles and the covered particles being uniformly dispersed, using 25 to 250 parts by weight of a liquid reactive dispersing medium and/or a dispersing medium containing a thermoplastic polymer having a deflection temperature under load or a melting point lower than that of the thermoplastic polymer used in the powder composition with respect to 100 parts by weight of the powder composition, and the dispersion liquid composition having conditions that a thermal conductive infinite cluster exhibiting a thermal conductivity of 1 to 35 W/mK is formed and a concentration of the high thermal conductive filler particles is equal to or more than a percolation threshold.

Filler-loaded high thermal conductive dispersion liquid composition having excellent segregation stability, method for producing said dispersion liquid composition, filler-loaded high thermal conductive material using said dispersion liquid composition, method for producing said material, and molded article obtained using said material

[Problem] Provided are a high filler-loaded high thermal conductive material which sufficiently utilizes features of an organic polymer while ameliorating drawbacks, enables integrated molding with ceramics, metals, semiconductor elements and the like, and has a low coefficient of thermal expansion and a high thermal conductivity; and a method for producing the high filler-loaded high thermal conductive material, a composition, coating liquid and a molded article. [Solution] Disclosed is a high filler-loaded high thermal conductive material formed by subjecting a composition which includes organic polymer particles and a thermally conductive filler having a graphite-like structure, and includes 5 to 60% by weight of the organic polymer particles and 40 to 95% by weight of the thermally conductive filler having a graphite-like structure relative to 100% by weight of the total amount of these components, is obtained, so that the thermally conductive filler is dispersed by delamination while maintaining the average planar particle size of the thermally conductive filler, and is capable of forming a thermally conductive infinite cluster; to press molding at a temperature higher than equal to the deflection temperature under load, melting point or glass transition temperature of the organic polymer and a pressure of 1 to 1000 kgf/cm; and to cooling and solidification.

Highly filled high thermal conductive material, method for manufacturing same, composition, coating liquid and molded article

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Aichi, Japan

Noriaki Takagi