Abstract: 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 %.

Abstract: 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 %.

Abstract: The friction material and friction member are provided, in which copper, having serious environmental effects, is not contained or is not contained at more than 0.5 mass % of copper, rust adhering force is low, rust delamination is unlikely to occur, the friction material composition includes a binder, an organic filler, an inorganic filler, and a fibrous substrate, wherein the friction material composition contains no copper as an element or contains not more than 0.5 mass % of copper, and contains fibrillated aramid fiber as the fibrous substrate, and wherein porosity measured by oil immersing method is not more than 15% and sulfate ion concentration measured by ion chromatography is not more than 500 ppm.

Abstract: To provide a method for producing a thin film consisting of nanosheet monolayer film(s) and use of the thin film obtained thereby. The method for producing a thin film consisting of nanosheet monolayer film(s) by a spin coat method according to the invention comprises a step for preparing an organic solvent sol formed by allowing nanosheets obtained by the exfoliation of an inorganic layered compound to be dispersed in an organic solvent; and a step for dropping the organic solvent sol onto a substrate and rotating the substrate using a spin coater. Preferably, the nanosheet size, the organic solvent sol concentration and the spin coater rotation speed are controlled.

Abstract: To provide a method for producing a thin film consisting of nanosheet monolayer film(s) and use of the thin film obtained thereby. The method for producing a thin film consisting of nanosheet monolayer film(s) by a spin coat method according to the invention comprises a step for preparing an organic solvent sol formed by allowing nanosheets obtained by the exfoliation of an inorganic layered compound to be dispersed in an organic solvent; and a step for dropping the organic solvent sol onto a substrate and rotating the substrate using a spin coater. Preferably, the nanosheet size, the organic solvent sol concentration and the spin coater rotation speed are controlled.