Abstract: A rolling bearing, for application in electric auxiliaries for a car, durable owing to high resistance to high temperatures and capable of restraining noises from being generated at low temperatures; and lubricant grease, for low and high temperature application, which can be sealed in the rolling bearing. The lubricant grease includes 100 parts by weight of a mixture of fluorine-containing lubricant grease containing perfluoropolyether oil as a base oil thereof and fluorocarbon resin powder as a thickening agent thereof and urea-containing lubricant grease containing polyester oil as a base oil thereof and a urea compound as a thickening agent thereof; and 3 to 30 parts by weight of polyolefin oil added to the mixed grease. The polyolefin oil has a pour point of not more than −50° C. and a kinematic viscosity of 10 to 70 mm2/s at 40° C.

Abstract: A belt tension adjusting device has a stationary fulcrum shaft, an arm pivotally supported on the fulcrum shaft through a slide bearing formed of a synthetic resin, a tension pulley mounted on the arm at one end thereof for tensioning a belt, and a damper having a piston rod abutting the arm on the other end thereof. The tension pulley is pressed against the belt by pivoting the arm under the force of the piston rod, thereby adjusting the tension of the belt. The inner peripheral surface of said slide bearing, which is in slide contact with said fulcrum shaft, is formed so as to have a surface roughness RA of not more than 6.3 &mgr;m. The slide bearing is formed of a resin composition comprising 65-85 vol % of a thermoplastic polyimide resin, an aromatic polyether ketone resin or a mixture of the resins, and 15-35 vol % of a tetrafluoroethylene resin.

Abstract: A composition having lubricity such as a low degree of friction and wear and capable of supplying a lubricant continuously to a surface of a slide surface is disclosed. Also, a slide bearing, a retainer for a rolling bearing, and a seismically isolated apparatus formed by molding the composition are disclosed. The composition is composed by adding a porous silica and a lubricant to a base material; adding the lubricant-impregnated porous silica to the base material; or adding the lubricant-impregnated porous silica and the lubricant to the base material.

Abstract: An electrical pittingproof rolling bearing having an insulating film is provided which is not creep-deformed under a bearing load even if used for a long time at high temperature and in which the bearing interference is stable with time under such severe use conditions. An insulating film formed on the surface of a bearing ring comprises a resin having a compression permanent strain of 2% or less under heating/pressurizing conditions in which a pressure of 20 MPa is applied for 24 hours at 120° C. Also, the insulating film is formed from a resin composition containing 30-80 vol % of a polyphenylene sulfide resin and 5-65 vol % of a polyamide-imide resin, and 5-50 vol % of insulating inorganic materials. Preferably, the insulating film is formed to cover at least one of the outer peripheral surface of the outer ring and the inner peripheral surface of the inner ring, and the side faces of at least one of the inner and outer rings.

Abstract: A composition having lubricity such as a low degree of friction and wear and capable of supplying a lubricant continuously to a surface of a slide surface is disclosed. Also, a slide bearing, a retainer for a rolling bearing, and a seismically isolated apparatus formed by molding the composition are disclosed. The composition is composed by adding a porous silica and a lubricant to a base material; adding the lubricant-impregnated porous silica to the base material; or adding the lubricant-impregnated porous silica and the lubricant to the base material.

Abstract: Resin composition and precision sliding parts are proposed. The resin composition includes a modified polyphenylene ether resin as a main component, a fibrous reinforcing agent, and a solid lubricant comprising tetrafluoroethyelene and graphite in the amount of 2-30 volume %. The modified polyphenylene ether resin is prepared by blending a polystyrene-family resin with a polyphenylele ether resin. The ratio of the tetrafluoroethylene resin and the graphite is 1:1 to 1:5. The fibrous reinforcing agent is glass fiber or carbon fiber. The fibrous reinforcing material is orientated such that the angle of fiber axis is not more than 30 degrees with respect to the sliding surface. The fibrous reinforcing material is a fibrous reinforcing material having a fiber diameter of 10 &mgr;m or less.

Abstract: Rolling bearings are proposed in which acoustic deterioration is suppressed which maintaining low dust, low torque and long life. Also, a grease for rolling bearings is proposed which is less likely to scatter under centrifugal force at high speed rotation, whereby preventing malfunction and noise of electronic information devices. A lubricating oil film of an ester-series oil having a dynamic viscosity at 40° C. of 35 mm2/s or over is formed on the friction surface of a rolling bearing. There is also provided a high-speed rolling bearing in which a lubricating grease having its worked penetration (JIS K2220) adjusted to 175-250 is retained therein. The grease is preferably prepared by adding a thickening agent containing 50 wt % or more of an aliphatic lithium salt 12-24 in carbon number to a base oil comprising 30 wt % or more of an ester oil having a dynamic viscosity at 40° C. of 10 mm2/s or over, and having its worked penetration (JIS K2220) adjusted to 175-250.

Abstract: A rolling bearing for a rotary shaft of a disk memory device which can maintain high-accuracy optical or magnetic recording ability over a long period of time. The rolling bearing supports a rotary shaft of a disk of disk memory device or a rotary shaft of an arm of a head, and has an inner ring having an inner diameter of 8 mm or less, and a retainer formed by molding an oil-containing resin composition comprising 40-94 wt % of a synthetic resin, 1-40 wt % of oil conducting material, and 5-30 wt % lubricating oil. Lubricating oil is dispersed uniformly in the composition, and can bleed onto the surface through the fibrous oil conducting material.

Abstract: A lubricative resin composition and a slide bearing made from such a resin. Even after a long-time slide movement, the friction coefficient is kept stably low and the wear is small. Moldability is also good. The lubricative resin composition is made up of 80-99.5 wt % of a synthetic resin which is either a mixture of 30-95 wt % of a polyamide resin and 5-70 wt % of a polyolefin, or a polyamide resin, and 0.5-20 wt % of a fatty acid having a carbon number of 10 or over and a melting point of 30° C. or under, such as montanic acid or stearic acid. A slide bearing is made from such a resin composition. Such slide bearings are used to support rotary shafts in a developing device for developing static latent images.

Abstract: A belt tension adjusting device is provided which even if the slide bearing is heated to a high temperature by heat of an automotive engine, it is less likely to get worn and the fulcrum shaft will not seize. The belt tension adjusting device has a stationary fulcrum shaft, an arm pivotally supported on the fulcrum shaft through a slide bearing formed of a synthetic resin, a tension pulley mounted on the arm at one end thereof for tensioning a belt, and a damper having a piston rod abutting the arm on the other end thereof. The tension pulley is pressed against the belt by pivoting the arm under the force of the piston rod, thereby adjusting the tension of the belt. The inner peripheral surface of said slide bearing, which is in slide contact with said fulcrum shaft, is formed so as to have a surface roughness RA of not more than 6.3 &mgr;m.

Abstract: An electrical pittingproof rolling bearing having an insulating film is provided which is not creep-deformed under a bearing load even if used for a long time at high temperature and in which the bearing interference is stable with time under such severe use conditions. An insulating film formed on the surface of a bearing ring comprises a resin having a compression permanent strain of 2% or less under heating/pressurizing conditions in which a pressure of 20 MPa is applied for 24 hours at 120° C. Also, the insulating film is formed from a resin composition containing 30-80 vol % of a polyphenylene sulfide resin and 5-65 vol % of a polyamide-imide resin, and 5-50 vol % of insulating inorganic materials. Preferably, the insulating film is formed to cover at least one of the outer peripheral surface of the outer ring and the inner peripheral surface of the inner ring, and the side faces of at least one of the inner and outer rings.

Abstract: A machine part is proposed which is made from TPI resin and is high in wear resistance and durability. The machine part is formed from a composition comprising 100 parts by weight of a thermoplastic polyimide resin, and 10-100 parts by weight of a reinforcing material, the thermoplastic polyimide resin having a crystallinity of 10% or over. The machine part may be a gear, a friction wheel or a cam used in a mechanical transmission. The crystallinity of the resin is adjusted to 10% or over by injection-molding the resin composition, and heating the thus injection-molded article at 220-340° C. for 5-24 hours.

Abstract: A heat-resistant, lubricative resin composition which can withstand temperatures of 250-270.degree. C., which is wear-resistant and low in friction, and which is less likely to attack a soft alloy such as aluminum alloy, and a high-performance, heat-resistant sliding bearing formed from the abovementioned heat-resistant, lubricative resin composition.

Abstract: A heat-resistant, lubricative resin composition which is low in friction and wear-resistant, and which is less likely to attack a soft alloy such as aluminum alloy, and a heat-resistant sliding bearing formed from such resin composition. Such heat-resistant, lubricative resin composition, adapted to be brought into sliding contact with a mating member made of an aluminum alloy, may be composed of 35-74% by weight of at least one heat-resistant thermoplastic resin selected from the group consisting of polyphenylene sulfide resins, thermoplastic polyimide resins having predetermined repeating units, polyether ketone resins, polycyanoarylether resins, polyamide-imide resins, polyether imide resins, polyether sulfonic resins, 10-45% by weight of a tetrafluoroethylene resin, and 16-30% by weight of lithium phosphate.

Abstract: An extruded porous article, which can be prepared by a ram-extruding method, comprising an aggregated aromatic polyimide powder which has a heat loss ratio of not more than 2 wt. %, the heat loss ratio being measured at 360.degree. C. for 1 hour, and a mean particle size in the range of 1 to 40 .mu.

Abstract: A resin composition having lubricating properties, which comprises 100 parts by weight of a synthetic resin, from 0.5 to 20.0 parts by weight of an organopolysiloxane and from 0.5 to 20.0 parts by weight of a fluorine-containing rubber or from 0.05 to 7.0 parts by weight of a trimethoxysilane, wherein at least one of said organopolysiloxane, fluorine-containing rubber and trimethoxysilane has a functional group.

Abstract: A polyether imide resin composition is proposed which has improved ductility and is less harmful to mating parts during sliding and thus can be used as the material for parts requiring rub resistance and abrasion resistance. It comprises 50-99.5 percent by weight of a polyether imide and 50-0.5 percent by weight of a vulcanizable organopolysiloxane elastomer.

Abstract: Resinous compositions having lubricity are proposed which are suited for use as bearing parts. The composition comprises a synthetic resin and one or two kinds of organopolysiloxane. Three-dimensional network of organopolysiloxane keeps low the friction coefficient and the abrasion coefficient, reinforces the substrate, and prevents the decrease of mechanical strength of synthetic resin.