[Object]

To provide the friction material for the disc brake such as an automobile, which is manufactured by forming the NAO friction material composition, enabling to restrain the brake vibration during braking in a high temperature.

[Means to Resolve]

In the friction material for the disc brake pad, which is manufactured by forming the NAO friction material composition that does not contain the copper component but contains the binder, the fiber base, the organic friction modifier, the inorganic friction modifier, and the lubricant, the friction material composition contains 1-4 weight % of the cashew dust as the organic friction modifier relative to the entire amount of the friction material composition, 7-12 weight % of the muscovite as the inorganic friction modifier relative to the entire friction material composition, and 0.5-5 weight % of the aluminum particle as the inorganic friction modifier relative to the entire amount of the friction material composition.

A friction assembly includes a dry-running disc pack with at least one lining disc and at least one counter disc, which are arranged one behind the other in an alternating manner in an axial direction of the disc pack, and which can be brought into frictional contact with one another, wherein the lining disc has at least one mass-pressed dry-running friction lining.

A friction assembly has a support plate, at least one brake pad and at least one reinforcing foil of the plate. The brake pad and the support plate are co-moulded from at least one heat-resistant resin. The reinforcing foil is fixed to the support plate via anchoring projections, joined to and which extend away from the foil, embedded in the resin to prevent or limit deformations of the support plate in the use of the assembly.

A friction material composition imparts superior friction coefficient, abrasion resistance, aggressiveness against an opposite member, and brake noise preventive characteristics in high speed and high load braking to a friction material, although containing no copper, which can pollute rivers, lakes, the ocean, or other environments, or containing copper in an amount of at most 0.5 mass. Moreover, a friction material and a friction member each uses the friction material composition. The friction material composition includes a binder, an organic filler, an inorganic filler, and a fibrous base material, and the friction material composition contains copper in an amount of at most 0.5 mass % as an element or contains no copper. The binder contains silicone-rubber dispersed phenolic resin in an amount of 5 to 10 mass %. The inorganic filler contains zirconium oxide in an amount of 20 to 33 mass %.

Provided is a friction member (such as a disc brake pad) having light weight by reducing weight of a back plate and having improved durability after repeated braking. The friction member is specifically a friction member in which a friction material (overlying material) is disposed through an underlying material on one surface of a back plate comprising a material having a lower specific gravity than that of steel, wherein the underlying material comprises 30 mass % or more in total of a bonding material, an organic filler, and an organic fiber.

[Object]

To provide the method of manufacturing the friction material that is capable of uniformly scorching into the deep part of the surface layer of the friction material in a short period of time.

[Means to Resolve]

In the method of manufacturing the friction material including the scorching step of scorching the surface of the friction material with the laser, the friction material contains 5 to 25% by weight of one or more types of black materials relative to the total amount of the friction material composition, and the L* of the CIE Lab of the surface of the friction material before scorching is 20 to 60.

There is provided a brake lining for railway vehicle that can reduce brake squeal in braking. A brake lining for railway vehicle is used for a disc brake system of a railway vehicle. This brake lining includes a base plate, a sintered friction material, and a friction material supporting mechanism. The friction material supporting mechanism is disposed between the base plate and the sintered friction material and supports the sintered friction material in such a manner that the sintered friction material can move with respect to the base plate. The sintered friction material has a Young's modulus of 35.0 GPa or more.

An asbestos-free friction material having at least one of the group consisting of inorganic, organic and metallic fibers, at least one binder, at least one friction modifier or lubricant and at least a filler or abrasive, wherein the binder is almost completely and exclusively inorganic and is constituted almost exclusively by a hydrated geopolymer or a blend of hydrated geopolymers.

The present invention is concerned with a frictional material composition not containing copper as an element or having the content of copper of 0.5 mass % or less, the composition containing (A) potassium titanate; and (B) one or more selected from the group consisting of lithium potassium titanate and magnesium potassium titanate, in a total content of the component (A) and the component (B) of 10 to 35 mass %, wherein on heating a molded product of the frictional material composition to 500 C. at a temperature rise rate of 10 C./min under an air atmosphere, the mass reduction rate is 5 to 20%.

The invention provides a friction material and a method of making the friction material. The friction material comprises man-made vitreous fibres whose chemical composition comprises: less than 2 wt % Fe.sub.2O.sub.3; 30-40 wt % MgO+CaO; 35-45 wt % SiO.sub.2; 17-24 wt % Al.sub.2O.sub.3; and 1-5 wt % K.sub.2O+Na.sub.2O.