Hitachi Chemical Company, Ltd.

Takashi Kikudome

Mitsuo Unno

Kazuya Baba

Manabu Ono

Masamichi MItsumoto

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 &#x3bc;m or less in a content of 30-45 mass % but not containing zirconium oxide with a particle size of more than 30 &#x3bc;m as the inorganic filler.

Non-asbestos friction material composition, friction material using same, and friction member

Provided by the present invention are: a non-asbestos frictional material composition containing a binder, an organic filler, an inorganic filler, and a fiber substrate, wherein, in the non-asbestos frictional material composition, content of a copper is 5% or less by mass as a copper element, content of a metal fiber other than a copper fiber and a copper alloy fiber is 0.5% or less by mass, and a titanate salt is contained therein with antimony trisulfide or zinc powders, with content of the titanate salt being in the range of 10 to 35% by mass; and a frictional material and a friction member that use the said non-asbestos frictional material composition.

Non-asbestos friction material composition

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 &#x3bc;m or less but not containing graphite with a particle size of more than 90 &#x3bc;m.

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.

Non-asbestos friction material composition, and friction material and friction member using same

A non-asbestos frictional material composition is provided, which is capable of provide a frictional material with excellent shear strength, anti-crack properties, and abrasion resistance, even with the reduced content of copper. 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 0.5 mass % or less as a copper element; a metal other than copper and copper alloy in a content of 0.5 mass % or less; an acrylic elastomer-dispersed phenol resin as the binder in a content of 7-15 mass %; and Ca(OH)and/or CaO as the inorganic filler in a content of 1-5 mass %.

Non-asbestos friction-material composition, and friction material and friction member using same

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.

Provided is a friction material composition comprising: a binder; a fibrous base material; an abrasive material; an inorganic filler; and an organic filler,

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Ibaraki, Japan

Takashi Kikudome