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

Patent metadata

Field	Value
Publication number	US-9863493-B2
Application number	US-201113819736-A
Country	US
Kind code	B2
Filing date	Nov 7, 2011
Priority date	Nov 19, 2010
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

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

First claim

The invention claimed is:

1. A non-asbestos frictional material composition, comprising:
a binder;
an organic filler comprising:
cashew dust in a content of 1.5-4.5 mass % of the total mass of the composition;

an inorganic filler comprising:
zirconium oxide with a particle size of 30 μm or less in a content of 30-45 mass % of the total mass of the composition, and not containing zirconium oxide with a particle size of more than 30 μm; and

a fiber base material, comprising:
an aramid fiber;
a mineral fiber;
copper in a content of 5 mass % or less of the total mass of the composition as a copper element; and
a metal fiber other than a copper fiber and a copper alloy fiber in a content of 0.5 mass % or less of the total mass of the composition,
wherein the content of the fiber base material is 5-10 mass % of the total mass of the composition.

2. The non-asbestos frictional material composition according to claim 1 , wherein the mean particle size of the zirconium oxide falls within the range of 1-7 μm.

3. The non-asbestos frictional material composition according to claim 1 , wherein the fiber base material comprises a mineral fiber with a mean fiber length of the entire mineral fiber of 100-400 μm.

4. The non-asbestos frictional material composition according to claim 1 , wherein the binder is selected from the group consisting of a phenol resin, an acrylic modified phenol resin, a silicone elastomer-dispersed phenol resin, and an alkylbenzene-modified phenol resin.

5. A frictional material being formed from the non-asbestos frictional material composition according to claim 2 .

6. A friction member being formed from a frictional material formed from the non-asbestos frictional material composition according to claim 2 and a backing plate.

7. A frictional material being formed from the non-asbestos frictional material composition according to claim 1 .

8. A friction member being formed from a frictional material formed from the non-asbestos frictional material composition according to claim 1 and a backing plate.

Assignees

• Kikudome Takashi
• Unno Mitsuo
• Baba Kazuya
• Hitachi Chemical Co Ltd

Inventors

• Kikudome Takashi
• Unno Mitsuo
• Baba Kazuya

Classifications

• F16D2200/0086

  Moulding materials together by application of heat and pressure · CPC title

• F16D2200/0073

  having lubricating properties · CPC title

• F16D2200/0069

  being characterised by their size · CPC title

• F16D2200/0065

  Inorganic, e.g. non-asbestos mineral fibres · CPC title

• F16D65/092 Primary

  for axially-engaging brakes, e.g. disc brakes · CPC title