Abstract: Provided is a V-ribbed belt that can suppress generation of slippage when it is splashed with water, and generation of noise. A V-ribbed belt has a rib-forming surface with plural rows of ribs formed therein and extending in a belt longitudinal direction to allow the rib-forming surface to be brought into contact with pulleys when in use, wherein the V-ribbed belt has reentrant portions on the rib-forming surface to form a non-contact area that is held out of contact with the pulleys when the V-ribbed belt is driven, so that water is allowed to flow into the non-contact area when the V-ribbed belt is splashed with water.

Abstract: Provide a helical synchronous belt comprising a urethane resin back layer, teeth and core cords, with silicone oil attached to the teeth side, which can demonstrate sufficient durability even in the case of a narrow helical synchronous belt required by small, precision equipment, etc.

Abstract: A friction transmission belt, which comprises a compressed rubber layer containing an ethylene-?-olefin elastomer, a short fiber and silica and having a single-layer structure. The friction transmission belt can inhibit a noise owing to the slip caused when the friction drive section of the belt is covered with water and has excellent flexural fatigue characteristics, and further can be manufactured by a simple and easy working process.

Abstract: The present invention provides a cleaning blade for an electrophotographic device, which, even when spherical (perfectly spherical or irregularly shaped), polymerized toner with a small particle diameter is used, can achieve sufficient abrasion resistance and sufficient cleaning ability (particularly cleaning ability under low-temperature and low-humidity conditions). The cleaning blade for an electrophotographic device includes an elastic rubber member; and a supporting member. The elastic rubber member has a double layer structure including an edge layer and a base layer. The edge layer is made of a material with a JIS-A hardness of 65° to 72° at 23° C. and a rebound resilience of 10 to 35%. The base layer is made of a material with a JIS-A hardness of 70° to 80° at 23° C. and a rebound resilience of 40 to 70%, the JIS-A hardness value being larger than the value of hardness of the edge layer.

Abstract: There is provided a core wire for a transmission belt that is capable of exerting sufficient performance for use when it is used as a transmission belt and substantially controlling occurrence of noises. There is also provided a transmission belt that is capable of exerting sufficient performance for use and substantially controlling occurrence of noises.

Abstract: An object of the present invention is to provide a blade for an electro-photographic device formed by two layers, which undergoes minimal permanent deformation and offers excellent mechanical strength, wear resistance and compliance to the use environment. A blade for an electro-photographic device whose edge and base are constituted by different materials, wherein such blade for an electro-photographic device is characterized in that at least the edge is made of ester polyurethane and the base other than the edge is made of ether polyurethane.

Abstract: The invention provides an organo-electronic functional material comprising a tris(arylamino)benzene represented by the general formula (I) wherein A and B are each a group represented by the general formula (II) in which R is an alkyl group of 1-6 carbons or a cycloalkyl group of 5 or 6 carbon atoms and n is 0, 1, 2 or 3, and A and B may be the same or different from each other, and exhibiting a cyclic voltamogram in which a deviation of peak current of cyclic curves as measured 50 times at a sweep rate of 20 mV/s falls within ±10% of the average of peak current. The organo-electronic functional material has an opto-electronic exchanging function, a reversible oxidation-reduction property and a high glass transition temperature, and can form amorphous film in itself.

Abstract: The present invention provides a friction transmission belt in which slip noise caused at the time when a belt drive portion is immersed in water is suppressed and which has excellent bending fatigue strength. A friction transmission belt which contains a compressed rubber layer having hardness after vulcanization measured by a type A durometer according to JIS K 6253 in a range from 80 or higher to less than 95 and containing ethylene-?-olefin elastomer and silica and practically no short fiber.

Abstract: An object of the present invention is to provide a liquid developing electrographic device roller suppressed in volumetric variation caused by a carrier. As a means for solving the problems, the present invention provides a liquid developing electrophotographic device roller including a shaft and an elastic material layer provided around the outer peripheral side of the shaft, wherein the elastic material layer is formed by using a polyurethane obtained by reacting a polyester polyol with a difunctional isocyanate.

Abstract: In a friction drive belt B, at least a contact part 13 of a belt body 10 with a pulley is made of an elastomer composition. The contact part 13 of the belt body 10 with a pulley has a large number of cellular pores 15 formed in the contact surface with the pulley.

Abstract: The invention provides a power transmission belt which is superior in oil resistance so that it is swollen to only a reduced degree, reduced in hardness, and small in abrasion if the rubber layers are stained with oil while the belt is being used in an oil-present environment. Such a power transmission belt has rubber layers which comprise a compression rubber layer and an adhesion rubber layer both of which are vulcanized and bonded to each other and load carrying cords are embedded in the adhesion rubber layer, wherein at least the compression rubber layer between the two rubber layers is formed of vulcanizate obtained by vulcanizing ethylene-?-olefin-diene rubber with an organic peroxide and a trifunctional co-crosslinking agent.

Abstract: In a drive belt system, an idler pulley 6 is formed by an auto belt alignment pulley. For example, a pulley body 60 is rotatably carried on a hollow cylindrical shaft member 62, a support rod 63 is inserted in the shaft member 62, and the pulley body 60 and the shaft member 62 are connected to each other via a pin 64 (pivot axis C2) for angular movement about the pin 64. The pin 64 is inclined orthogonally to the shaft member 62 and forward in the direction of rotation of the pulley body 60 with respect to the direction of a radial shaft load L. With this configuration, when a flat belt 8 deviates to one side, the pulley body 60 inclines to create a level difference in the direction of the radial shaft load L and angularly moves orthogonally to the flat belt 8, thereby correcting the deviation of the flat belt 8. To fulfill the auto belt alignment function, belt span lengths Si and So between the idler pulley 6 and both the adjacent pulleys 3 and 4 are each set larger than the width of the flat belt 8.

Abstract: A flat belt that enables the degree of wear thereof to be visually or tactually determined is provided. There is provided a flat belt that has a surface contacting a pulley and a recess formed thereon for detecting wear.

Abstract: It is an object of the present invention to provide a friction transmission belt which is superior in adhesive properties such as dynamic adhesion and heat resistant adhesion on repeated flexing of a friction transmission belt or on running under heating conditions around an engine, and is also superior in desired performance such as heat resistance, abrasion resistance and an abnormal noise-preventing property.

Abstract: It is an object of the present invention to improve the long-term durability of a power transmission belt. There is provided a power transmission belt characterized in that it includes a rubber layer that is formed of a cross-linked rubber composition and extends in a belt lengthwise direction, and core wires that is adhered to the rubber layer and embedded therein in the belt lengthwise direction, in which the rubber layer with the core wires embedded therein is formed to have a tensile stress of 1.1 to 1.7 MPa when the rubber layer is stretched in the belt lengthwise direction by 10% at 125° C.

Abstract: The invention provides an organic electronic functional material which comprises a 1,3,5-tris(4-(N,N-diarylamino)phenyl)benzene represented by the general formula (I) wherein A and B are each preferably a phenyl group having an alkyl group of 1-6 carbons or a cycloalkyl group of 5 or 6 carbons at the 4-position.

Abstract: [Purpose] A belt drive system, in which a drive belt 20 is wrapped between a drive pulley 1 drivingly connected to a drive source 11 and a driven pulley 2 connected to an driven unit 12 via a joint 32 provided to stop torque transmission when receiving a load equal to or over a predetermined value and torque is transmitted via the drive belt 20 from the drive pulley 1 to the driven pulley 2, ensures that when the driven unit 12 malfunctions, the joint 32 stops the torque transmission without unnecessarily increasing the coefficient of friction against the driven pulley 2 or the belt tension. [Solution] The belt drive system is configured so that when a slip corresponding to the load on the joint 32 equal to or over the predetermined value occurs between the drive belt 20 and the driven pulley 2, the coefficient of friction between the drive belt 20 and the driven pulley 2 becomes higher than that before the slip occurs.

Abstract: The invention provides a 1,3,5-tris(diarylamino)benzene represented by the general formula (I) wherein A and B are each independently a group represented by the general formula (II) in which R is a hydrogen atom, an alkyl group of 1-6 carbons or a cycloalkyl group of 5 or 6 carbons and n is 0, 1, 2 or 3, provided that the values of n of A and B are not the same to each other. Such a 1,3,5-tris(diarylamino)benzene is able to form an amorphous film by vacuum evaporation at a relatively low temperature with almost or substantially no thermal decomposition, and is preferably used as organo-electronic functional material, in particular, as a hole injecting agent or a hole transporting agent.

Abstract: A V-ribbed belt B includes a plurality of V-ribs 13 each formed to extend in a lengthwise direction of the belt, the plurality of V-ribs 13 are disposed in juxtaposition in a widthwise direction of the belt on the belt inner face, and the V-ribbed belt B is wrapped around a pulley to bring the plurality of V-ribs 13 into contact with the pulley for power transmission. The plurality of V-ribs 13 are made of a rubber composition in which 5 to 50 parts by mass of thermoplastic resin having a melting point of 110° C. or higher is mixed with 100 parts by mass of ethylene-?-olefin elastomer rubber which is raw rubber.

Abstract: It is an object of the present invention to provide a power transmission belt which is superior in dynamic adhesion and heat-resistant adhesion against repeated flexing of a power transmission belt or running under heating conditions around an engine, and is also superior in heat resistance, abrasion resistance and an abnormal noise-preventing property.