Abstract: A superfinishing grindstone suitable for precision grinding, that contains either RB (rice bran) ceramic fine grains or CRB (carbonized rice bran) ceramic fine grains or a combination of both, for use as abrasive grains. The grains of RB ceramic fine grains and CRB ceramic fine grains have multiple small pores which allow the grains to be easily removed from a finished structure. These fine grains have a high Vickers hardness, which makes them highly resistant to bending, scratching, abrasion or cutting.

Abstract: A bearing grease composition used under clean atmosphere, as in a bearing of hard disc drive, which has small dust generation (scatter), a long life, excellent acoustic performance and low torque. It has been found that especially the bearing grease composition comprising a carbonate having a branched alkyl group of 13 to 15 carbon atoms and a metallic soap shows remarkable characteristics.

Abstract: A sleeve bearing for use in water, the sleeve bearing having a shaft and a sleeve is disclosed. The sleeve or the shaft is made of a synthetic resin composition obtained by uniformly dispersing fine powder of RBC or CRBC in a resin. The synthetic resin composition may have blended with it inorganic fibers and/or organic fibers. The sleeve bearing has low coefficient of friction in water.

Abstract: The electrically motorized pump has a low energy loss because it uses of the shaft and the sleeve made from synthetic resin composition obtained by uniformly dispersing fine powder of RBC or CRBC in a resin. The typical process for the production of a synthetic resin composition for making the sleeve bearing for the pump for use in water includes kneading with a resin the fine powder of RBC or CRBC at a temperature in the neighborhood of the melting point of the resin, and thereby uniformly dispersing the fine powder of RBC or CRBC in the resin. Fibers, such as glass fibers, may be blended with the fine powder of RBC or CRBC and the resin.

Abstract: This is provided a water purification method using a filter capable of being molded into free shapes in which RB ceramics and/or CRB ceramics of 10 to 2,000 angstroms in pore diameter and 0.1 to 1.1 cm3/g in pore volume are used as an absorption and filtration material.

Abstract: There is provided a water purification method using a filter capable of being molded into free shapes in which RB ceramics and/or CRB ceramics of 10 to 2,000 angstroms in pore diameter and 0.1 to 1.1 cm3/g in pore volume are used as an absorption and filtration material.

Abstract: A polishing-washing method includes the steps of providing a polishing media containing a fine powder of an RB ceramic and/or CRB ceramic and bringing a medium stream containing the polishing media into contact with the surfaces of a body to be worked. In this method, the polishing media solution obtained after the polishing-washing can be re-used by recycling after simply separating the particles of metal oxides and the particles of removed burrs and cutting metal chips from the solution composition by utilizing a difference in specific gravity.

Abstract: A ceramic material suitable for use in production of paving tiles, construction tiles, flooring in offices, flooring in machinery plants and so forth is obtained by a method comprising steps of mixing defatted bran derived from rice bran with a thermosetting resin before kneading, subjecting a kneaded mixture thus obtained to a primary firing in an inert gas at a temperature in a range of 700 to 1000° C., pulverizing the kneaded mixture after the primary firing into carbonized powders, kneading the carbonized powders with which ceramic powders, a solvent, and a binder as desired are mixed into a plastic workpiece (kneaded mass), pressure-forming the plastic workpiece at pressure in a range of 10 to 100 MPa, and subjecting a formed plastic workpiece thus obtained again to firing in an inert gas atmosphere at a temperature in a range of 100 to 1400° C.

Abstract: There is provided a deodorizing and absorbing material comprising RB ceramics and/or CRB ceramics as an odor absorbing material, which has excellent deodorizing properties and long term persistency thereof and is easily fabricated into a complicated shape when the material is used as a molded product.

Abstract: The invention provides a stud for a shoe which is light in weight, has a long service life and excellent abrasion resistance, and a shoe using the same. The stud for the shoe is made up of a central protruding member, a seating plate, and peripheral binding members. The seating plate is formed of a metallic material, and the central protruding member or the peripheral binding members are formed of RB ceramic or CRB ceramic. The shoe is fabricated by securely attaching the studs to an outsole thereof.

Abstract: There is provided an air cleaning filter capable of molding into free shapes in which an RB ceramics and/or CRB ceramics of 10 to 2,000 angstrom in pore diameter and 0.1 to 1.1 cm8/g in pore volume is used as an absorbing and filtering material.

Abstract: A grease composition for bearings of information devices comprising a carbonate base oil, a lithium soap, and at least one organomolybdenum compound selected from molybdenum dithiophosphates and molybdenum dithiocarbanates.

Abstract: There are provided a shoe midsole which is light in weight, long life, excellently abrasion resistant, sufficiently air-permeable and well-workable, and shoes using same. The shoe midsole in the form of footprint plate comprising a light metallic skeleton in the form of footprint plate and RB ceramics or CRB ceramics molded around the skeleton.

Abstract: There is provided a grease composition useful for bearings of cars and aircraft which is stable in a wide range of temperature of 40 to 180° C. and exhibits low torque properties under high loading at low temperatures. A low torque grease composition having dynamic viscosity (40° C.) of 40 to 150 mm2/sec which comprises a base oil consisting of (a) straight-chain perfluoropolyether oil having dynamic viscosity (40° C.) of 25 mm2/sec or less and represented by the following general formula: RfO(CF2O)p(C2F4O)q(C3F6O)rRf, wherein Rf is a perfluoro lower alkyl group and all of p, q and r is an integer and a sum thereof is an integer of 25 to 45 and (b) straight-chain perfluoropolyether oil having dynamic viscosity (40° C.) of 250 mm2/sec or more and represented by the following general formula: RfO(CF2O)p(C2F4O)q(C3F6O)rRf, wherein Rf is a perfluoro lower alkyl group and p, q and r are an integer of 10 to 20; and (c) polytetrafluoroethylene as a thickener.

Abstract: There is provided a maintenance-free sleeve bearing arrangement that is light in weight, has a long service life and does not require resupply of oil during operation. The sleeve bearing arrangement is comprised mainly of a shaft and a sleeve bearing, wherein the sleeve bearing formed of CRB ceramics, and/or the shaft formed of the CRB ceramics are used.

Abstract: The invention provides an anticorrosive lubricant composition for molded plastic products, causing no chemical attack to mechanical components such as gears, shafts, and so forth, formed of molded resins, even if used therefor, and also provides mechanical components such as gears, shafts, and so forth, to which the same is applied. The anticorrosive lubricant composition for molded plastic products contains 100 parts by weight of a synthetic hydrocarbon oil having kinematic viscosity of 10 to 500 mm2/s at 40° C., and 0.1 to 10 parts by weight of a corrosion prevention additive.

Abstract: A biodegradable putty-like material which can be molded under pressure into containers to hold seedlings or young plants. The putty like material contains defatted rice bran and water which are kneaded and heated together to create the putty like material for agricultural use.

Abstract: A superfinishing grindstone suitable for precision grinding, that contains either RB (rice bran) ceramic fine grains or CRB (carbonized rice bran) ceramic fine grains or a combination of both, for use as abrasive grains. The grains of RB ceramic fine grains and CRB ceramic fine grains have multiple small pores which allow the grains to be easily removed from a finished structure. These fine grains have a high Vickers hardness, which makes them highly resistant to bending, scratching, abrasion or cutting.

Abstract: There is provided powder detergent containing a surfactant, a powder modifier, a fragrance and a builder, in which the powder modifier comprises a RB ceramics powder and/or CRB ceramics powder at least as one component thereof. The present powder detergent exhibits high stain removability and powder properties as well as improved long term fragrance stability.

Abstract: A resin composite for use in the manufacture of slide bearings is formed of a resin and fine particles of RBC or CRBC dispersed in the resin. The resin composite can be molded into slide bearings.