Sumitomo Chemical Company, Limited

Shintaro Komatsu

Hiroshi Harada

Mitsuo Maeda

Yoshiyuki Fukuhara

A liquid crystal polyester resin composition including a liquid crystal polyester resin, 15 parts by mass or more and 100 parts by mass or less of a carbon fiber with respect to 100 parts by mass of the liquid crystal polyester resin, and 0.001 parts by mass or more and 0.02 parts by mass or less of a fullerene with respect to 100 parts by mass of the carbon fiber.

Liquid crystal polyester resin composition and injection molded body

The present invention relates to a prepreg which contains an oriented liquid crystal polymer and a base that uses a continuous carbon fiber bundle as a forming material. The liquid crystal polymer is a thermotropic liquid crystal polymer and the base is included in an amount of at least 25 parts by mass but not more than 550 parts by mass per 100 parts by mass of the liquid crystal polymer.

Prepreg, prepreg laminate and method for producing prepreg

A liquid crystal polyester composition contains: a liquid crystal polyester in an amount of 100 parts by mass as well as a fibrous filler and a plate-like filler in an amount of not less than 65 parts by mass and not more than 100 parts by mass in total. The fibrous filler in the composition has a number average fiber diameter of not less than 5 &#x3bc;m and not more than 15 &#x3bc;m and a number average fiber length of more than 200 &#x3bc;m and less than 400 &#x3bc;m. The mass ratio of the fibrous filler to the plate-like filler in the composition is not less than 3 and not more than 15. The flow starting temperature of the composition is not lower than 250&#xb0; C. and lower than 314&#xb0; C.

Liquid crystal polyester composition, method for producing liquid crystal polyester composition, and molded article

A method for producing a liquid-crystalline polymer composition containing a liquid-crystalline polymer and a magnetic filler formed by heat-treating a composite material of a ceramic powder and a soft magnetic metal powder in an inert gas atmosphere.

Method of producing a liquid-crystalline polymer composition and molded article thereof

To provide a liquid crystal polyester composition that yields compacts that are resistant to cracking. A plate-like filler with a volume-average particle size of 14 &#x3bc;m or greater and a fibrous filler are combined with a liquid crystal polyester to form a liquid crystal polyester composition. The total content of the plate-like filler and the fibrous filler is 45-55 wt % with respect to the total of the liquid crystal polyester composition. The weight ratio of the fibrous filler content to the plate-like filler content is greater than 0.5 and not greater than 0.65.

Liquid crystal polyester composition

The present invention provides a liquid crystal polyester composition, comprising (i) 100 parts by weight of a liquid crystal polyester, and (ii) 65 to 100 parts by weight of a combination of a fibrous filler with a plate-like filler, wherein the fibrous filler has a number-average fiber diameter of 5 to 15 &#x3bc;m, and a number-average aspect ratio of 20 to 40, and a content ratio by weight of the fibrous filler to the plate-like filler is more than 1.0 and 1.6 or less; and a process for producing the liquid crystal polyester composition comprising a step of melt-kneading the above respective components with one another.

Liquid crystal polyester composition and process for producing the same

A thermal-conductive resin composition which can provide an molded article excellent in thermal conductivity and/or mechanical strength is provided. The resin composition comprising a resin selected from a thermosetting resin and a thermoplastic resin; a granule having a number average particle diameter of 0.5 to 5 mm and comprising alumina fibers with a number average fiber diameter of 1 to 50 &#x3bc;m; and an alumina fine particle.

Thermal conductive resin composition

The present invention provides a resin composition comprising: (A) a thermoplastic resin, (B) a granular material which has a number average particle diameter of 0.5 to 5 mm and is obtainable by granulating a fiber mainly having alumina with a number average fiber diameter of 1 to 50 &#x3bc;m, and (C) a filler composed of a material of which electric resistivity at 300 K is 10&#x3a9;m or less. The resin composition can be molded into a molded article with electric insulation. The electric resistivity of the molded article has sufficient electric insulation in applications such as in electric and electronic parts.

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Tsukuba, Japan

Shintaro Komatsu