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Copper-free friction material and brake pad

A technology of friction materials and brake pads, which is applied in the field of copper-free friction materials and brake pads, can solve the problems of unstable friction coefficient, heavy metal pollution, cost teaching, etc., and achieve improved dual state effect, thermal crack resistance and wear resistance good, low-cost effect

Active Publication Date: 2016-06-15
BEIJING TIANYISHANGJIA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the copper-free organic ceramic brake pads in the prior art, such as unstable friction coefficient, low strength, heavy metal pollution, and cost teaching, so as to provide a stable friction coefficient and reduce braking. Low-cost copper-free friction materials and brake pads that reduce the wear of the disc, reduce the fatigue cracks of the brake disc, prevent the transfer and bonding of the base metal when the brake pad is at high temperature during braking, and improve the service life of the brake disc.

Method used

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  • Copper-free friction material and brake pad

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Effect test

Embodiment 1

[0023] Copper-free automobile brake pad friction material of the present invention, by weight (1 weight part is 1g), comprises raw material:

[0024] 35 parts of steel fiber, 10 parts of modified phenolic resin, 8 parts of nitrile rubber, 12 parts of styrene-butadiene rubber, 12 parts of graphite, 3 parts of molybdenum disulfide, 5 parts of cryolite, 8 parts of barium sulfate, 2 parts of aramid, weight 3 parts of high-quality calcium carbonate, 3 parts of heavy magnesium oxide, 3 parts of white corundum, and 3 parts of silicon carbide.

[0025] Mix the components uniformly according to the above ratio to obtain a mixture, put the mixture in a mold and press it, set the pressure to 10Mpa, and the pressing time to 150s, then heat the pressed blank, set the heating temperature to 180 °C, cured for 20 hours to prepare automobile brake pads.

[0026] The performance of the automobile brake pads prepared above is shown in Table 1.

Embodiment 2

[0028] Copper-free automobile brake pad friction material of the present invention, by weight (1 weight part is 1g), comprises raw material:

[0029] 40 parts of steel fiber, 7 parts of modified phenolic resin, 6 parts of nitrile rubber, 12 parts of styrene-butadiene rubber, 15 parts of graphite, 3 parts of molybdenum disulfide, 5 parts of cryolite, 7 parts of barium sulfate, 5 parts of aramid, weight 5 parts of high-quality calcium carbonate, 5 parts of heavy magnesium oxide, 2 parts of white corundum, and 3 parts of silicon carbide.

[0030] Mix the components evenly according to the above proportions to obtain a mixture, put the mixture in a mold and press it, set the pressure at 15Mpa, press time for 100s, and then heat the pressed blank, set the heating temperature at 160°C , cured for 21 hours, and made of automobile brake pads.

[0031] The performance of the automobile brake pads prepared above is shown in Table 1.

Embodiment 3

[0033] Copper-free automobile brake pad friction material of the present invention, by weight (1 weight part is 1g), comprises raw material:

[0034] 30 parts of steel fiber, 12 parts of modified phenolic resin, 10 parts of nitrile rubber, 15 parts of styrene-butadiene rubber, 12 parts of graphite, 3 parts of molybdenum disulfide, 8 parts of cryolite, 5 parts of barium sulfate, 5 parts of aramid, weight 3 parts of high-quality calcium carbonate, 1 part of heavy magnesium oxide, 3 parts of white corundum, and 4 parts of silicon carbide.

[0035] Mix the components uniformly according to the above ratio to obtain a mixture, put the mixture in a mold and press it, set the pressure at 13Mpa, and the pressing time for 125s, then heat the pressed blank, set the heating temperature at 150°C, After curing for 23 hours, an automobile brake pad is obtained. The performance of the automobile brake pads prepared above is shown in Table 1.

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Abstract

The invention discloses a copper-free friction material and a brake pad. The copper-free friction material comprises the following raw materials by weight: 30-40 parts of steel fiber, 5-15 parts of modified phenolic resin, 5-10 parts of nitrile butadiene rubber, 10-15 parts of styrene butadiene rubber, 10-15 parts of graphite, 3-4 parts of molybdenum disulfide, 5-10 parts of cryolite, 5-8 parts of barium sulfate, 1-5 parts of aramid fiber, 1-5 parts of heavy calcium carbonate, 1-5 parts of heavy magnesium oxide, 1-3 parts of aramid fiber, and 3-4 parts of silicon carbide. The brake pad made of the copper-free friction material provided by the invention has good hot cracking resistance and wear resistance, and low wear rate, thereby prolonging the service life. And reasonable control of the friction material composition proportion can ensure no abnormal wear to a brake disc.

Description

technical field [0001] The invention relates to the field of automobile brake pads, in particular to a copper-free friction material and a brake pad. Background technique [0002] With the continuous increase of the number of automobiles in our country, the pollution problems caused by this have been paid more and more attention by people. [0003] At present, high-performance brake materials at home and abroad mostly use metallic copper. Copper is a key component in the design of brake pads. Frictional stability of pads and discs at various operating temperatures. In the traditional non-asbestos organic material (NAO) and low steel formulations of brake pads used in Europe, Asia and North America, copper even accounts for 5% to 20% of the total mass of brake pads. After the brake material is processed into brake pads, when the vehicle brakes, some copper-containing dust will be generated at the contact position between the brake pads and the brake disc due to the friction...

Claims

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Application Information

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IPC IPC(8): C09K3/14F16D69/02
CPCC09K3/1409C09K3/1436F16D69/028
Inventor 吴佩芳李想
Owner BEIJING TIANYISHANGJIA NEW MATERIAL
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