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Friction material composition and friction material

A technology of friction materials and compositions, applied in the direction of friction linings, chemical instruments and methods, gear transmission mechanisms, etc., can solve the problems of increased friction coefficient, prone to whistling, inability to provide copper ductile and ductile lubrication functions, etc. problem, to achieve stable friction coefficient and small load effect

Inactive Publication Date: 2016-06-29
AKEBONO BRAKE IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] In this copper-free friction material that does not contain copper, in order to solve the problem of howling after the friction material is placed at a low temperature, even when using fluorine-based polymer fibers as in Patent Document 4, the ductility and ductility of copper cannot be provided. Lubrication function due to ductility, so if the friction material absorbs moisture after being placed in a cold environment, the coefficient of friction increases and whistling tends to occur

Method used

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  • Friction material composition and friction material
  • Friction material composition and friction material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6 and comparative example 1～3

[0049]

[0050] The blended materials shown in Table 1 were placed together in a mixing mixer, followed by mixing at room temperature for 2 minutes to 10 minutes, thereby obtaining a friction material composition. The obtained friction material compositions are processed through the steps of preforming (1), thermoforming (2), heating and firing (3), so as to prepare friction materials.

[0051] (1) Preformed

[0052] The above-mentioned friction material composition was placed in a mold of a preforming press, followed by forming at room temperature at 20 MPa for 5 seconds, thereby preparing a preformed product (sample size: 45×80 mm).

[0053] (2) Thermoforming

[0054] The preformed product was placed in a thermoforming mold, and a metal plate (press plate: P / P) coated with an adhesive in advance was laminated thereon, followed by thermocompression forming at 150° C. and 50 MPa for 5 minutes.

[0055] (3) heating and firing

[0056] This thermoformed product was heat-tre...

Embodiment 7～10 and comparative example 4

[0079]

[0080] Friction materials were manufactured using the blended materials shown in Table 2 in the same manner as in Test Example 1, but the thermoforming surface pressure in thermoforming (2) was changed to be in the range of 50 MPa to 70 MPa.

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Abstract

The present invention provides a friction material having reduced noise after being left in cold conditions when used as a disc brake pad, brake lining, or the like, and copper components are essentially not included in the friction material. The present invention is: a friction material composition including a fiber base material, a binding material, and a friction adjusting material, the copper content of the friction material composition being no more than 0.5% by mass, and the friction material composition containing fluorine-based polymer particles; and a friction material obtained by molding the friction material composition.

Description

technical field [0001] The invention relates to a friction material composition and a friction material. More specifically, the present invention relates to a friction material composition capable of reducing howling (brake noise) after the friction material is placed in a cold environment, and a friction material obtained from the friction material composition. Background technique [0002] Traditionally, friction materials such as brakes are manufactured by using a fibrous base material, a friction modifier, and a binder, blending them, and subjecting them to a manufacturing process including steps such as preforming, thermoforming, and finishing. In friction materials such as brakes, fibrous substrates such as organic fibers such as aramid fibers, inorganic fibers such as glass fibers, or metal fibers such as copper fibers; organic friction modifiers such as rubber dust and cashew nut dust; inorganic friction modifiers such as calcium carbonate, barium sulfate, metal par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14
CPCF16D69/00F16D2069/008F16D2200/0086F16D69/026F16D2200/0034
Inventor 花家祐二关克司须贝幸廉宫道素行
Owner AKEBONO BRAKE IND CO LTD
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