Abstract: A boron nitride powder is a boron nitride powder surface-treated with a reactive silicone oil having a mass average molecular weight of 5000 or more. The boron nitride powder can be mixed with a resin to produce a heat dissipation sheet having an improved insulating property.

Abstract: A heat dissipation sheet of the present invention has a surface hardness of 60 degrees to 95 degrees in terms of an Asker C hardness and a dielectric breakdown voltage of 15 kV/mm or more. According to the present invention, a heat dissipation sheet having an excellent thermal conductivity and insulating property can be provided.

Abstract: A composite sheet can include one or more metal organic frameworks dispersed in a sheet base material formed of fibers. The one or more metal organic frameworks can be supported on surfaces of the fibers. After a heat treatment, a ratio of a mass of the one or more metal organic frameworks to a mass of the entire composite sheet can be 80 mass % or more. One fiber forming a central region of the composite sheet in a thickness direction can have a surface coverage by the metal organic frameworks of 60% or more. A surface exposure ratio of the one or more metal organic frameworks can be 50% or more.

Abstract: The inorganic filler of the present invention has a zeta potential of ?15 mV or less at a pH of 7. The heat dissipation member of the present invention contains the inorganic filler of the present invention and a resin. The present invention can provide an inorganic filler that has good dispersibility in a resin, and a heat dissipation member containing the inorganic filler.

Abstract: A copolymer contains a (meth)acrylic based monomer unit A having an anionic group, a (meth)acrylic based monomer unit B having a cationic group, and a (meth)acrylic based monomer unit C other than the (meth)acrylic based monomer unit A and the (meth)acrylic based monomer unit B, and the (meth)acrylic based monomer unit C has a weight average molecular weight of 2,000 to 9,000. The surfactant contains the copolymer. The resin composition contains a resin, the surfactant, and an inorganic filler. The heat dissipation sheet contains the resin composition. The present invention can provide a copolymer that is capable of reducing the viscosity of a resin composition containing a resin and an inorganic filler, a surfactant containing the copolymer, a resin composition containing the surfactant and an inorganic filler, and a heat dissipation sheet containing the resin composition.

Abstract: A pump unit for a chromatograph includes a plunger pump and an upstream check valve. The plunger pump has a pump head and pumps a mobile phase. The upstream check valve is provided upstream of the pump head. The upstream check valve includes a flow-path portion and a temperature regulator. The flow-path portion guides the mobile phase to the plunger pump. The temperature regulator regulates a temperature of the mobile phase passing through the flow-path portion.

Abstract: Aggregated boron nitride particles in which hexagonal boron nitride primary particles are aggregated and which include an alkyl group-containing silane coupling agent. The present invention can provide boron nitride powder for obtaining a heat-dissipation sheet with excellent thermal conductivity, a heat-dissipation sheet with excellent thermal conductivity, and a method of producing a heat-dissipation sheet with excellent thermal conductivity.

Abstract: A heat dissipation sheet obtained by molding a heat conductive resin composition, the heat dissipation sheet having a partial discharge start voltage of 2800 to 5000 kV/mm. The method for producing the heat dissipation sheet includes a step of blending a resin and a boron nitride powder containing at least an aggregated boron nitride particle formed by an aggregation of hexagonal boron nitride primary particles to prepare a heat conductive resin composition, a step of molding the heat conductive resin composition into a sheet shape to prepare a heat conductive resin composition sheet, and a step of heating and pressurizing the heat conductive resin composition sheet under a vacuum. Thus, a heat dissipation sheet excellent in heat conductivity and insulation property and a method can produce the heat dissipation sheet.

Abstract: A boron nitride powder, containing at least an aggregated boron nitride particle formed by an aggregation of hexagonal boron nitride primary particles, the powder having a particle size distribution including at least a first maximum point, a second maximum point at which a particle size is larger than at the first maximum point, and a third maximum point at which a particle size is larger than at the second maximum point. The heat dissipation sheet is obtained by molding a heat conductive resin composition containing the boron nitride powder and a resin. The method for producing a heat dissipation sheet includes blending the boron nitride powder and a resin to prepare a heat conductive resin composition, molding the heat conductive resin composition into a sheet shape to prepare a heat conductive resin composition sheet, and heating and pressurizing the heat conductive resin composition sheet under a vacuum.

Abstract: A heat dissipation sheet having excellent thermal conductance, is a molded thermally conductive resin composition prepared by blending an inorganic filler component and a resin component, wherein the inorganic filler component particle size distribution includes a first maximum point attributable to the first inorganic filler and a second maximum point attributable to the second inorganic filler; the particle size at the first maximum point is 15 ?m or more; the particle size at the second maximum point is ? or less the particle size at the first maximum point; and an accumulated amount of the frequency between the peak start and the peak end of the peak having the first maximum point is 50% or more, and which has a surface roughness of from 1.5 to 3.0 ?m and a thickness of 0.2 mm or less.

Abstract: A heat-conductive resin composition containing an inorganic filler component and a resin component, wherein the inorganic filler component includes first and second inorganic fillers, a particle size distribution has a first maximum point caused by the first inorganic filler and a second maximum point caused by the second, the diameter at the first maximum point is 15 ?m or more, the diameter at the second is ? or less that at the first, an integrated amount of frequency between a peak start and end in a peak having the first maximum point is 50% or more, and the first inorganic filler is formed by agglomerating hexagonal boron nitride primary particles and has a crushing strength of 6 MPa or more. The heat dissipation sheet is obtained by molding the heat-conductive resin composition.

Abstract: A heat dissipation sheet containing a silicone resin and a thermally conductive filler, wherein with respect to the cross-sectional shape of the thermally conductive filler, the average value of an aspect ratio of the 1st to 24th particles from the largest of biaxial average diameters, is in a range of 0.4 or more and 1.4 or less. In addition, an area ratio (Sr) of a total area S of cross-sectional shapes of the particles to a whole area of the cross-sectional view may be in a range of 20% or more and 80% or less, and the particle number ratio may be less than 1. Further, a thermal resistance ratio of a thermal resistance value when a pressure of 0.4 MPa is applied to a thermal resistance value when a pressure of 1.0 MPa is applied may be 1 or more.

Abstract: A heat-radiating sheet, in which when after sandwiching a heat-radiating grease between a heat-radiating sheet arranged on an aluminum plate and a glass plate, a heat cycle test is performed 100 cycles, an area ratio of an area of the heat-radiating grease after performing the heat cycle test of 100 cycles to an area of the heat-radiating grease before performing the heat cycle test is 1.0 to 2.0. A heat-radiating sheet laminate includes a heat-radiating sheet and a heat-radiating grease layer formed on the surface of the heat-radiating sheet. A structure includes the heat-radiating sheet, a heat-generating element, and the heat-radiating grease intervening between the heat-radiating sheet and the heat-generating element. A heat-radiating treatment method of a heat-generating element includes a step of applying a heat-radiating grease on the heat-radiating sheet and a step of arranging a heat-generating element on the heat-radiating sheet having the heat-radiating grease applied thereon.

Abstract: A heat-radiating sheet having a volume resistivity of 1.0×109 ?·cm or more as measured by a direct current voltage of 500 V according to JIS K6911 after being impregnated with an antifreeze containing 98% by mass or more of ethylene glycol at a temperature 25° C. for 250 hours. It is possible to provide a heat-radiating sheet having high tolerance against gasoline and engine oil.

Abstract: A heat-radiating sheet, in which a rate of reduction (%) ((R1-R2)/R1×100) of a thermal resistance (R2) (° C./W) of the heat-radiating sheet as measured when tightened at a tightening torque of 6 kgf·cm by using a screw after being impregnated in an antifreeze containing 98% by mass or more of ethylene glycol at a temperature of 25° C. for 500 hours relative to a thermal resistance (R1) (° C./W) of the heat-radiating sheet as measured when tightened at a tightening torque of 6 kgf·cm by using a screw is 30% or less. It is possible to provide a heat-radiating sheet having high tolerance against gasoline and engine oil.

Abstract: A heat-diffusion sheet when a needle electrode having a cone having a height of 3 mm and a bottom surface diameter of 0.75 mm at a distal end section, wherein a 2.0-kV current voltage having a frequency of 60 Hz, is penetrated stepwise every 10 ?m but also retained for 60 seconds before the penetration, a distance between the distal end of the needle electrode and an aluminum plate at the time of dielectric breakdown of the heat-diffusion sheet is larger than 0 ?m and 80 ?m or less, or the needle electrode short-circuits the aluminum plate without dielectric breakdown of the heat-diffusion sheet. The method includes a step of pre-heating a composition for heat-diffusion sheet at a pre-heating temperature lower than a curing starting temperature; and a curing step of heating the composition for heat-diffusion sheet at a temperature of the curing starting temperature or higher while pressurizing the pre-heated composition sheet for heat-diffusion sheet.

Abstract: A sample temperature adjustment device includes a temperature control space for controlling a temperature of a sample by containing the sample inside, a heat insulating layer enclosing the temperature control space so that the temperature control space is thermally separated from outside air of the sample temperature adjustment device, a cooling part for cooling the temperature control space, a heat transfer plate covering at least a part of outer surfaces of the heat insulating layer, and a heater that heats the heat transfer plate to prevent dew condensation on a surface of the heat transfer plate.

Abstract: A switching valve includes a valve head having a plurality of connection ports connecting a pipe, a rotor accommodated therein and including a groove for connecting the connection ports, and a rotor shaft holding the rotor and rotatably equipped, and a driver having a holder holding the valve head and a motor rotating the rotor shaft of the valve head held by the holder. Further, the valve head is provided with a home position sensor detecting a reference position in a rotation direction of the rotor shaft, and a teaching information holder holding information on a relative positional relationship between the reference position and a position of the rotor shaft when the rotor is at a predetermined position, and the reference position acquired using the home position sensor.

Abstract: A sample temperature adjustment device includes a temperature control space for controlling a temperature of a sample by containing the sample inside, a heat insulating layer enclosing the temperature control space so that the temperature control space is thermally separated from outside air of the sample temperature adjustment device, a cooling part for cooling the temperature control space, a heat transfer plate covering at least a part of outer surfaces of the heat insulating layer, and a heater that heats the heat transfer plate to prevent dew condensation on a surface of the heat transfer plate.

Abstract: A switching valve includes a valve head having a plurality of connection ports connecting a pipe, a rotor accommodated therein and including a groove for connecting the connection ports, and a rotor shaft holding the rotor and rotatably equipped, and a driver having a holder holding the valve head and a motor rotating the rotor shaft of the valve head held by the holder. Further, the valve head is provided with a home position sensor detecting a reference position in a rotation direction of the rotor shaft, and a teaching information holder holding information on a relative positional relationship between the reference position and a position of the rotor shaft when the rotor is at a predetermined position, and the reference position acquired using the home position sensor.