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Friction material and method of manufacturing the same

A technology of friction materials and friction modifiers, applied in friction linings, mechanical equipment, etc., can solve problems such as difficult handling, and achieve the effects of easy handling, high friction coefficient and wear resistance, and improved attenuation characteristics

Inactive Publication Date: 2007-04-18
ADVICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This could be one of the possible causes of brake noise or other unusual noises
[0007] Abrasive powder is difficult to handle in the manufacture of friction materials due to its small particle diameter

Method used

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  • Friction material and method of manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0039] The enlarged powder in Example 1 included a rubber content of about 20%, or a ground to rubber weight ratio of 80:20. The enlarged powder accounts for about 15% of the volume of the friction material.

[0040] SBR (a product of Asahi Kasei under the trade mark Tafdene 2000) and BR (a product of Asahi Kasei under the trade mark Diene NF35R) were used as the rubber to bind the ground powder. The enlarged powder is obtained by kneading 70 parts by weight of SBR, 30 parts by weight of BR, 5 parts by weight of zinc white, 2 parts by weight of stearic acid, 0.5 parts by weight of sulfur, 3 parts by weight of vulcanization catalyst and 400 parts by weight of grinding powder Obtained in a pressure kneader. The enlarged powder was passed through a pan granulator (Fuji Paudal) and a rotary granulator (Horai) to form pellets with a diameter of 1-2 mm.

[0041] Then, the base fiber, friction modifier, binder, and enlarged powder of mill powder shown in FIG. 1 were mixed in a dry ...

example 5

[0044] The rubber content of the oversized powder in Example 5 was about 75%, or a weight ratio of ground powder to rubber of 25:75. More specifically, the enlarged powder was obtained by replacing 400 parts by weight of Example 1 with 33 parts by weight of ground powder. The abrasive dust in this example may comprise about 15% by volume of the friction material. Example 5 was produced in the same manner as Example 1.

example 6

[0045] The rubber content of the oversized powder in Example 6 was about 80%, or a weight ratio of ground powder to rubber of 20:80. More specifically, an enlarged powder was obtained by replacing the 400 parts by weight of Example 1 with 25 parts by weight of ground powder. In this example, the enlarged powder may comprise about 15% of the volume of the friction material. Example 6 was produced in the same manner as Example 1.

[0046] The enlarged powder in each of Examples 7 and 8 contained about 33% rubber and phenolic resin, or a 67:33 weight ratio between ground powder and rubber and phenolic resin mixture. Phenolic resin (Sumilite Resin PR310 from SumitomoBakelite) was added to the raw material as granules when they were granulated to obtain the enlarged powders in Examples 7 and 8. The enlarged powder may comprise about 15% or 10% of the volume of the friction material. Examples 7 and 8 were produced in the same manner as Example 1.

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Abstract

A friction material includes base fibers, a friction conditioner, a binder and enlarged dust. The enlarged dust is a combination of grinding dust and an elastic material such as rubber.

Description

[0001] This application claims priority from Japanese Patent Application Serial No. 2005-297539, the contents of which are incorporated herein by reference. technical field [0002] The present invention relates to a friction material, such as a brake pad or lining, or a clutch lining. More specifically, the present invention relates to a friction material made from a raw material comprising abrasive dust generated during the manufacture of the friction material or particles of waste friction material, and to the manufacture of such a friction material. A method of friction material. Background technique [0003] The manufacture of friction materials such as brake pads or pads involves mixing base fibers, friction modifiers, and binders, molding the mixture under heat and pressure, and grinding the molded body to an appropriate size. Accordingly, grinding or polishing powder is inevitably generated during the manufacturing process of the friction material. These grinding p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/14
CPCC08J3/22F16D69/026
Inventor 小林雅明藤川裕之小森雄二
Owner ADVICS CO LTD
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