Abstract: Centrifugal impeller (14) of centrifugal air blower (1) has main plate (15); a plurality of blades (18); ring-shaped plate (20); and a cylindrical wall (22). The blades (18) are circumferentially disposed on the side of the outer periphery of front side (17) of main plate (15). Ring-shaped plate (20) is attached to tip sections (19) of blades (18). Cylindrical wall (22) is disposed on the back side (21) of the main plate (15) so as to be concentric therewith. The structure above provides centrifugal impeller (14) and centrifugal air blower (1) with improved air-blow efficiency and noise-reduced operations.

Abstract: The present invention provides a flexible conductive crosslinked body excellent in durability having a small influence of a reaction residue after the crosslinking on an object to which the conductive crosslinked body adheres, and a production process of the flexible conductive crosslinked body. The conductive crosslinked body is synthesized from a conductive composition containing a rubber polymer, an organic metal compound, and a conducting agent and has a crosslinked structure. The production process of the conductive crosslinked body includes: a mixed solution preparing step for preparing a mixed solution in which the rubber polymer, the conducting agent, and the organic metal compound are mixed in a solvent capable of dissolving the rubber polymer and capable of chelating the organic metal compound; and a crosslinking step for removing the solvent from the mixed solution to allow a crosslinking reaction to proceed.

Abstract: To provide a conductive film that is flexible, extendable and contractible, and for which the electrical resistance hardly increases even when the conductive film is extended. The conductive film contains an elastomer and metallic filler particles, and satisfies a condition (A) [an average value of reference numbers is 0.8 (1/?m) or more, or the metallic filler particles include flake-like metallic filler particles having a thickness of 1 ?m or less and an aspect ratio of 26 or more and the average value of the reference numbers is 0.4 (1/?m) or more] and a condition (B) [a number of unit areas for which an area percentage of the elastomer is 60% or more is 20 or more], the condition (A) being a conductivity indicator and the condition (B) being a flexibility indicator.

Abstract: A dielectric film which has high electrical resistance and excellent durability and a process for producing the dielectric film are provided. Also provided is a transducer which has large displacement and excellent durability. The dielectric film includes a three-dimensional crosslinked body that is synthesized from an organic metal compound, a rubber polymer that is other than a polydimethyl siloxane and has a functional group that is reactive with the organic metal compound, and an inorganic filler that has a functional group that is reactive with the organic metal compound. The transducer is configured by interposing the dielectric film between at least a pair of electrodes.

Abstract: Centrifugal impeller (14) of centrifugal air blower (1) has main plate (15); a plurality of blades (18); ring-shaped plate (20); and a cylindrical wall (22). The blades (18) are circumferentially disposed on the side of the outer periphery of front side (17) of main plate (15). Ring-shaped plate (20) is attached to tip sections (19) of blades (18). Cylindrical wall (22) is disposed on the back side (21) of the main plate (15) so as to be concentric therewith. The structure above provides centrifugal impeller (14) and centrifugal air blower (1) with improved air-blow efficiency and noise-reduced operations.

Abstract: To provide an actuator which is easily made a small size and flexible, and has a large displacement. The actuator comprises a rod-shaped actuator element, having one axial end thereof fixed, including a dielectric film made of a dielectric elastomer and a plurality of electrodes arranged via the dielectric film, in the actuator element, the dielectric film extends as a voltage applied across the electrodes becomes large, and a load member connected to the other axial end of the actuator element and fixed in a state in which the actuator element is permitted to be extended axially, characterized in that making large the voltage applied across the electrodes causes the dielectric film to be extended, whereby the actuator element is extended axially according to the tension of the load member.

Abstract: An electrically conductive polymer available at low-cost and superior both in electrical conductivity and solubility. The electrically conductive polymer is solvent soluble and is obtained by imparting electrical conductivity to a pi-electron conjugated polymer by means of a dopant; the dopant comprises an alkylbenzenesulfonic acid or its salt having 2 or more alkyl substituent groups, wherein a total carbon number of the alkyl substituent groups is 10 to 37.

Abstract: First, a sheet member which is being unwound and conveyed from a winding body, and in which a conductive film is stuck on a support sheet, is stamped in such a shape that a coil portion, a frame portion defined around the coil portion, and a joining portion connecting the coil portion to the frame portion are left unstamped. Next, a protective sheet which is made sticky, is stuck onto a surface of the stamped structure where the conductive film is stuck, and then the support sheet is peeled off. Next, an insulative support sheet which is being unwound and conveyed from a winding body, is stuck onto a surface of the structure with the protective sheet stuck thereon where the stamped conductive film is stuck, and then the protective sheet is peeled off.

Abstract: An elastic member of a semiconductive polymer comprising a conductive composition containing a conductive polymer and binder polymer, wherein the elastic member satisfies both characteristics of (A) a variation of 1.5 digit or less between the electrical resistance at an applied voltage of 1V and the electrical resistance at an applied voltage of 133V under an environment of 25° C. and 50% RH, and (B) a variation of one digit or less between the electrical resistance at an applied voltage of 10V under an environment of 15° C. and 10% RH and the electrical resistance at an applied voltage of 10V under an environment of 35° C. and 85% RH.

Abstract: An elastic member of a semiconductive polymer comprising a conductive composition containing a conductive polymer and binder polymer, wherein the elastic member satisfies both characteristics of (A) a variation of 1.5 digit or less between the electrical resistance at an applied voltage of 1V and the electrical resistance at an applied voltage of 133V under an environment of 25° C. and 50% RH, and (B) a variation of one digit or less between the electrical resistance at an applied voltage of 10V under an environment of 15° C. and 10% RH and the electrical resistance at an applied voltage of 1OV under an environment of 35° C. and 85% RU.

Abstract: An electrically conductive polymer available at low-cost and superior both in electrical conductivity and solubility. The electrically conductive polymer is solvent soluble and is obtained by imparting electrical conductivity to a pi-electron conjugated polymer by means of a dopant; the dopant comprises an alkylbenzenesulfonic acid or its salt having 2 or more alkyl substituent groups, wherein a total carbon number of the alkyl substituent groups is 10 to 37.

Abstract: First, a sheet member which is being unwound and conveyed from a winding body, and in which a conductive film is stuck on a support sheet, is stamped in such a shape that a coil portion, a frame portion defined around the coil portion, and a joining portion connecting the coil portion to the frame portion are left unstamped. Next, a protective sheet which is made sticky, is stuck onto a surface of the stamped structure where the conductive film is stuck, and then the support sheet is peeled off. Next, an insulative support sheet which is being unwound and conveyed from a winding body, is stuck onto a surface of the structure with the protective sheet stuck thereon where the stamped conductive film is stuck, and then the protective sheet is peeled off.

Abstract: An electrically conductive foam component free from blooming and having a stable electrically conductive property. The electrically conductive foam component is produced by foaming an electrically conductive composition which comprises a base polymer and a borate compound represented by the following general formula (1): wherein R1 and R2, which may be the same or different, each represent a hydrogen atom, an alkyl group or an aryl group; M is an alkaline metal or an alkaline earth metal; and n is a positive number.

Abstract: An electrically conductive foam component free from blooming and having a stable electrically conductive property.

Abstract: A urethane composition for making a sheet transport roll, the composition comprising: (A) a polyether polyol blend containing polytetramethyleneether glycol (PTMG) and polypropylene glycol (PPG) in a weight ratio of PTMG/PPG=99/1 to 50/50; (B) a polyisocyanate; and (C) a chain lengthening agent; the urethane composition in a cured state having a hardness of not smaller than 40, and a crosslinking density of 0.15 to 0.8 mmol/cm3 or an allophanate bond concentration of 0.03 to 0.07 mmol/g.

Abstract: An elastic member of a semiconductive polymer comprising a conductive composition containing a conductive polymer and binder polymer, wherein the elastic member satisfies both characteristics of (A) a variation of 1.5 digit or less between the electrical resistance at an applied voltage of 1V and the electrical resistance at an applied voltage of 133V under an environment of 25° C. and 50% RH, and (B) a variation of one digit or less between the electrical resistance at an applied voltage of 10V under an environment of 15° C. and 10% RH and the electrical resistance at an applied voltage of 10V under an environment of 35° C. and 85% RH.

Abstract: A roller for office automation equipment which does not suffer from impairment of a cross-linking reaction or occurrence of a delay therein, is excellent in permanent set resistance and low-temperature bleedability, and permits achievement of a low hardness. A preferred roller for office automation equipment comprises a base rubber layer, an intermediate layer and a surface layer formed in this sequence on an outer peripheral surface of a shaft, wherein the base rubber layer is formed of a liquid rubber composition containing the following constituents (A) to (D): (A) a liquid rubber, derived from at least one of butadiene and isoprene, and having a structural unit (&agr;) having an alkenyl group on the side chain thereof; (B) a hydrosilyl cross-linking agent; (C) a hydrosilylation catalyst; and (D) a mineral oil containing not more than 0.31 wt. % sulfur.

Abstract: A urethane composition for making a sheet transport roll, the composition comprising: (A) a polyether polyol blend containing polytetramethyleneether glycol (PTMG) and polypropylene glycol (PPG) in a weight ratio of PTMG/PPG=99/1 to 50/50; (B) a polyisocyanate; and (C) a chain lengthening agent; the urethane composition in a cured state having a hardness of not smaller than 40°, and a crosslinking density of 0.15 to 0.8 mmol/cm3 or an allophanate bond concentration of 0.03 to 0.07 mmol/g.