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Friction material

A technology of friction materials and friction adjustment materials, which is applied in the direction of friction linings, gear transmission mechanisms, and other chemical processes, can solve the problems of unavailable friction materials and expensive titanate, and achieve cheap product appearance, good product appearance, The effect of ensuring effectiveness

Active Publication Date: 2016-12-14
NISSHINBO BRAKE INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] However, titanate is expensive as a raw material for friction materials, and if the techniques described in Patent Document 1 and Patent Document 2 are used, there is a problem that an inexpensive friction material cannot be provided.

Method used

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Examples

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Embodiment

[0062] Examples and comparative examples are shown below, and the present invention will be specifically described, but the present invention is not limited to the following examples.

[0063] [Methods of Manufacturing Friction Materials of Examples 1-10 and Comparative Examples 1-9]

[0064] The friction material compositions with the compositions shown in Table 1 and Table 2 were mixed for 5 minutes with a Loedige mixer, and preliminarily molded by applying a pressure of 30 MPa in a molding die for 10 seconds. This preliminary molded product is superimposed on a steel liner that has been washed, surface treated, and coated with an adhesive material in advance, and molded in a thermoforming mold at a molding temperature of 150°C and a molding pressure of 40 MPa for 10 minutes. , and then heat-treated (post-cure) at 200° C. for 5 hours, and then polished to form a friction surface, and disc brake pads for cars were produced (Examples 1-10, Comparative Examples 1-9).

[0065] ...

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Abstract

The present invention addresses the problem of obtaining a friction material which satisfies a law on the content of copper components and, despite this, ensures the required effectiveness, fade resistance, wear resistance, and strength of friction material / back plate adhesion and which has a satisfactory product appearance and is inexpensive. The friction material is for use as disc brake pads and is obtained by molding a composition of a friction material which is a non-asbestos-organic (NAO) material containing no copper ingredient. The friction material composition contains an inorganic friction control material (a) that contains no titanic acid salt and has an average particle diameter of 0.5-20 [mu]m and a Mohs hardness of 5-8, a porous inorganic friction control material (b) having a microporous structure, and a carbonaceous lubricant (c), the amounts of (a), (b), and (c) being 8-15 vol%, 1-3 vol%, and 5-10 vol%, respectively, relative to the total amount of the friction material composition. The carbonaceous lubricant contains coke in an amount of 2-4 vol% relative to the total amount of the friction material composition, the coke having an average particle diameter of 300-800 [mu]m. In the friction material composition, the contents of (a), (b), and (c) satisfy the following relationship. 1.0<=((a)+(b)) / (c)<=2.5

Description

technical field [0001] The present invention relates to a friction material used in disc brake pads of automobiles and the like, which is obtained by molding a friction material composition of non-asbestos organic (NAO, Non-Asbestos-Organic) material. Background technique [0002] Conventionally, disc brakes have been used as braking devices for automobiles, and disc brake pads obtained by affixing a friction material to a metal base member have been used as friction members. [0003] Friction materials are classified as follows: semi-metallic friction materials containing 30% by weight or more and less than 60% by weight of steel fibers as the fiber base material relative to the total friction material composition; steel fibers are contained in a part of the fiber base material and contain A metal-less friction material with less than 30% by weight of steel fibers relative to the total amount of the friction material composition; an NAO material that does not contain steel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14F16D69/02
CPCF16D69/025F16D2200/0069F16D2200/0073F16D69/026C09K3/14F16D69/02F16D69/023
Inventor 长嶋淳
Owner NISSHINBO BRAKE INC
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