Abstract: A non-asbestos frictional material composition is provided, which is capable of provide a frictional material with low environmental load and with excellent friction coefficient, anti-crack properties, and abrasion resistance compared with conventional ones. Furthermore, a frictional material and a friction member formed by using this non-asbestos frictional material composition are provided. The non-asbestos frictional material composition containing a binder, an organic filler, an inorganic filler, and a fiber base material includes: copper in a content of 5 mass % or less as a copper element; a metal fiber other than a copper fiber and a copper alloy fiber in a content of 0.5 mass % or less; and mica and graphite with a particle size of 90 ?m or less but not containing graphite with a particle size of more than 90 ?m.

Abstract: A non-asbestos frictional material composition containing a binder, an organic filler, an inorganic filler, and a fiber base material includes: copper in a content of 0.5 mass % or less as a copper element; a metal fiber other than a copper fiber and a copper alloy fiber in a content of 0.5 mass % or less; cashew dust in a content of 3.5-10.0, wollastonite, and mica. The non-asbestos frictional material composition can provide a frictional material with excellent friction coefficient, anti-crack properties, and abrasion resistance even with the reduced content of copper and a copper fiber possibly causing environmental pollution. The frictional material and the friction member are formed by using the above-mentioned non-asbestos frictional material composition.

Abstract: A non-asbestos frictional material composition is provided, which is capable of provide a frictional material with low environmental load and with excellent friction coefficient, anti-crack properties, and abrasion resistance compared with conventional ones. Furthermore, a frictional material and a friction member formed by using this non-asbestos frictional material composition are provided. The non-asbestos frictional material composition containing a binder, an organic filler, an inorganic filler, and a fiber base material, includes: copper in a content of 5 mass % or less as a copper element; a metal fiber other than a copper fiber and a copper alloy fiber in a content of 0.5 mass % or less; cashew dust in a content of 1.5-4.5 mass % as the organic filler; zirconium oxide with a particle size of 30 ?m or less in a content of 30-45 mass % but not containing zirconium oxide with a particle size of more than 30 ?m as the inorganic filler.

Abstract: The non-asbestos frictional material composition containing a binder, an organic filler, an inorganic filler, and a fiber base material includes: copper in a content of 5 mass % or less as a copper element; a metal fiber other than a copper fiber and a copper alloy fiber in a content of 0.5 mass % or less; iron powder and tin powder as the inorganic filler in a total content of 1-12 mass %. The non-asbestos frictional material composition can provide a frictional material with excellent friction coefficient, anti-crack properties, and abrasion resistance even with the reduced content of copper and a copper fiber that possibly cause environmental pollution. The frictional material and the friction member are formed by using the above-mentioned non-asbestos frictional material composition.

Abstract: Disclosed is a friction material composition, comprising a fiber matrix, a binder, an organic filler, and an inorganic filler, wherein the fiber matrix contains at least two types of mineral fibers different in average fiber length from each other, and the difference between the minimum value and the maximum value among the average fiber lengths of the mineral fibers is 50 ?m or more. Also disclosed is a friction material produced by pressure-molding the friction material composition while heating. Further disclosed is a friction material having an underlayer material interposed between a friction surface and a back metal, while the underlayer material is produced by pressure-molding the friction material composition while heating.

Abstract: There are provided a carbon fiber composite material having excellent mechanical properties such as toughness and strength, and a brake member, a structural member for semiconductor, a heat resistant panel and a heat sink, all of which use this carbon fiber composite material. The carbon fiber composite material is obtained by mixing carbon fiber with a resin, subsequently molding the mixture and carbonizing the molded product, and subjecting the resultant carbonized product to melt impregnation with silicon, in which the lattice spacing d002 of the carbon (002) plane of the carbon fiber as measured by an X-ray diffraction method is 3.46 to 3.51. A brake member, a structural member for semiconductor, a heat resistant panel and a heat sink, all of which use this carbon fiber composite material, are provided.

Abstract: A rotor main body 1 (disc brake), which is made of a C/SiC composite material and provided with a bolt joint around a center axis of the disc brake, of a brake rotor R1. The bolt joint is formed by embedding a block body 13, which is formed by winding carbon fibers into a cylindrical shape, in the disc brake. The strength of the bolt joint which fastens the rotor main body 1 to, for example, a hat portion can be increased.

Abstract: An object of the present invention is to produce a heat-resistant carbon/silicon carbide system composite material having a high density without deteriorating the mechanical properties such as toughness of carbon fiber. The present invention is a carbon/silicon carbide system composite material comprising a matrix containing a silicon carbide phase; a carbon fiber dispersed in the matrix; and a eutectic alloy phase containing silicon and an element for lowering a melting point of the silicon, wherein the carbon fiber is covered with a cover layer formed of a composite carbide of the silicon and the element.

Abstract: Disclosed is a friction material composition, comprising a fiber matrix, a binder, an organic filler, and an inorganic filler, wherein the fiber matrix contains at least two types of mineral fibers different in average fiber length from each other, and the difference between the minimum value and the maximum value among the average fiber lengths of the mineral fibers is 50 ?m or more. Also disclosed is a friction material produced by pressure-molding the friction material composition while heating. Further disclosed is a friction material having an underlayer material interposed between a friction surface and a back metal, while the underlayer material is produced by pressure-molding the friction material composition while heating.

Abstract: A disc rotor for a disc brake with a vent hole shape which has an inner peripheral corner with a larger radius to reduce stress generated by braking torque and suppresses an increase in stress generated by pad pressure. The disc rotor includes a first sliding part connected to a bell housing, a second sliding part located parallel to, and spaced in an axle direction from, the first sliding part, a plurality of ribs circumferentially spaced between the sliding parts, and vent holes formed by the ribs and the sliding parts. The inner peripheral shape of each of the vent holes has at least two arc shapes with different curvature radii at an end perpendicular to the disc rotor's rotation direction. The smallest curvature radius is 2 mm or more. An arc curvature radius on the first sliding part side is larger than that on the second sliding part side.

Abstract: The object of the present invention is to analyze association relationships between data items and processes being used in an existing system. By analyzing a program or the like, the type and numbers of access instructions to data items in each step of the program is examined (step 13). Then, data item association degree is calculated from the type of access instruction etc., and the values of the association degree are corrected using system requirements etc (step 15 and step 17). Processes having high association degrees are collected together by referencing the corrected valves of the association degree (step 21). Based on the groups of collected processes, process division and data item partitioning is performed (step 23). Interfaces between processes are then displayed based on divided processes and partitioned data items (step 25).