Sumitomo Chemical Company, Limited

Ntn Corporation

Mitsuo Maeda

Yasuo Matsumi

Hiroshi Harada

Kenji Ito

Fuminori Satoji

Yusaku Kohinata

Tomohiro Sato

Shintaro Komatsu

Hiroyasu Yamauchi

Shintaro Saito

Shigehide Yoshida

Satoshi Okamoto

Kuniaki Asai

Tadayasu Kobayashi

Tomoya Hosoda

Hideo Nomura

Hirokazu Matsui

Sadanobu Iwase

Ryo Miyakoshi

Hidehiro Kotaka

Taiga Sakai

Hideaki Nezu

A liquid crystalline polymer composition for foam molding using a supercritical fluid as a foaming agent. The liquid crystalline polymer composition includes a liquid crystalline polymer and a scale-like inorganic filler, in which a content of the scale-like inorganic filler is 1 part by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the liquid crystalline polymer composition.

Liquid crystal polymer composition for foam molding, method for producing foam molded body, and foam molded body

Because it is possible to cool down a column member at a higher speed than natural cooling, throughput can be improved further. Especially, when the tubular body Mand the column part Mare made of different metals and the column part Mis pressed into the tubular body Ma distortion will occur in the column member Mand Mand the top board Mfixed to the column member Mand Mdue to the difference in thermal expansion coefficients between them, but the cooling paths Pand Pcan absorb a distortion caused by the difference in thermal expansion coefficients of these metals. In particular, when the top board Mis used as a mold for resin molding, it is possible to perform resin molding precisely because distortion caused by the difference in thermal expansion coefficients does not easily occur.

Heater, resin molding apparatus, resin molding method and resin molded body

A resin composition is provided for a sliding member. The composition contains an amorphous resin, flake graphite, and a carbon fiber. The content of the flake graphite is 5 to 40 parts by mass relative to 100 parts by mass of the amorphous resin, and the content of the carbon fiber is 5 to 60 parts by mass relative to 100 parts by mass of the amorphous resin.

Resin composition for sliding member

The present invention provides a high-voltage coil superior in insulating properties and rigidity at high temperatures, which comprises a bobbin, a conducting wire wound around the bobbin, and an encapsulant encapsulating the conducting wire, wherein the encapsulant comprises a liquid crystalline polyester having a repeating unit represented by defined formula (1), &#x2014;O&#x2014;Ar&#x2014;CO&#x2014;, a repeating unit represented by defined formula (2), &#x2014;CO&#x2014;Ar&#x2014;CO&#x2014;, and a repeating unit represented by defined formula (3), &#x2014;X&#x2014;Ar&#x2014;Y&#x2014;, as a forming material.

High-voltage coil

A method of producing a liquid crystal polyester composition, the twin-screw extruder including a cylinder having a supply port for supplying the liquid crystal polyester, a first addition port for adding the filler other than fibrous fillers and a second addition port for adding a fibrous filler which are provided downstream of the supply port, and a screw provided with kneading portions on the upstream side and downstream side of the first addition port, a resin temperature (T) of the liquid crystal polyester after kneading in the nearest upstream kneading portion satisfying formula (1), and a resin temperature (T) of the liquid crystal polyester after kneading in the nearest downstream kneading portion satisfying formula (2):FT&#x2212;100(&#xb0; C.)&#x2266;1&#x2266;FT+20(&#xb0; C.)&#x2003;&#x2003;(1)FT&#x2212;100(&#xb0; C.)&#x2266;2&#x2266;FT+30(&#xb0; C.)&#x2003;&#x2003;(2)wherein FT represents the flow starting temperature of the liquid crystal polyester.

Method of producing liquid crystal polyester composition

Disclosed is a material for fiber manufacturing comprising a liquid crystal polyester satisfying the following requirements (a) and (b): (a) the weight-average molecular weight is equal to or less than 30000 and the polydispersity is equal to or less than 2.5; and (b) the melt viscosity measured at 360&#xb0; C. with conditions of a nozzle pore diameter of 0.5 mm and a shear velocity of 1000 susing a flow feature testing machine is equal to or less than 70 Pa&#xb7;s.

Material for fiber manufacturing and fiber

The present invention provides a resin composition comprising a liquid crystal polyester and a titanium oxide filler, wherein when a value obtained by converting the content of aluminum in the titanium oxide filler to the content of aluminum oxide is A (% by weight) and the volume average particle diameter of the titanium oxide filler is B (&#x3bc;m), A and B satisfy the formula (I): A&#x2267;0.1 and the formula (II): A/B&#x2266;25, a reflective board obtained by molding the resin composition, and a light-emitting apparatus comprising the reflective board and a light-emitting element. According to the resin composition of the present invention, a reflective board having high reflectance and high heat resistance can be obtained. Furthermore, a light-emitting apparatus which is excellent in properties such as luminance can be obtained by using the reflective board.

Resin composition, reflective board and light-emitting apparatus

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 composition comprising a liquid crystal polyester, a white pigment and a glass fiber bundle obtained by bundling glass fibers using a sizing agent comprising a polyurethane having a polyester polyol unit and at least one of an aliphatic diisocyanate unit or an alicyclic diisocyanate unit, wherein the polyester polyol unit is a polyol unit having an aliphatic polyhydric alcohol unit and at least one of an aliphatic polybasic acid unit or an alicyclic polybasic acid unit. The liquid crystal polyester composition can provide a reflective plate having a high reflectivity.

Liquid crystal polyester composition, reflective plate and light-emitting device

A pressure loss section H(H) extends from a position corresponding to a corner of a resin package, and Sis the minimum value of the opening area of the pressure loss section H(H) perpendicular to the direction of resin flow (X axis) in the pressure loss section H(H) during resin molding, while Sis the average value of the opening areas of excess resin reservoirs Hto Hperpendicular to the direction of resin flow (Y axis) within excess resin reservoir Hto Hduring molding. In this lead frame, S&#x3c;Sis satisfied.

Lead frame, resin package, semiconductor device and resin package manufacturing method

The method for producing a resin package according to the present invention includes a step of forming a copper oxide layer by oxidizing the surface of a lead frame in which at least the surface is made of copper, and a step of forming a resin package main unit by allowing a resin to adhere to the copper oxide layer on the lead frame surface by resin molding for package, and then removing a predetermined area of the copper oxide layer with an acidic solution.

Resin package and production method thereof

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.

Insulating resin composition and application thereof

A housing for a hydrodynamic bearing unit of this type is formed from a resin material having high oil resistance and low outgassing property to ensure the cleanliness of the bearing unit. An ester-based lubricating oil is used as a lubricating oil filled inside the hydrodynamic bearing unit, and the housingis formed from an LCP-based resin material.

Hydrodynamic bearing unit

A liquid crystalline polyester resin composition is provided, by which a molded article with an enhanced specific modulus can be produced. The liquid crystalline polyester resin composition comprises mica fillers in an amount of 15 to 30 parts by mass and carbon fibers with specific volume resistance of 10&#x3a9;cm or more in an amount of 5 to 20 parts by mass with respect to 100 parts by mass of the liquid crystalline polyester.

Liquid crystalline polyester resin composition, molded article and holder for optical pickup lenses

The present invention provides a liquid crystalline polyester resin composition suitable for an optical pickup unit. The composition comprises a liquid crystalline polyester, a mica and a hollow filler. Using the liquid crystalline polyester resin composition, an optical pickup unit with a high soldering resistance and a high torsional elastic modulus can be produced while suppressing breakage of the hollow filler in the composition.

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Tsukuba, Japan

Mitsuo Maeda