Resin-based friction body, resin-based synthetic brake pad and preparation method thereof

A resin-based, friction body technology, used in friction linings, mechanical equipment, gear shifting mechanisms, etc., can solve problems such as unstable friction coefficient, avoid softening and decomposition, improve stability, and reduce noise and vibration.

Active Publication Date: 2020-12-04
北京浦然轨道交通科技股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to aim at the drawbacks of the prior art, to provide a resin-based friction body, a resin-based synthetic brake pad and a preparation method thereof, so as to overcome the problem of unstable friction coefficient in the braking process of the existing brake pads

Method used

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  • Resin-based friction body, resin-based synthetic brake pad and preparation method thereof
  • Resin-based friction body, resin-based synthetic brake pad and preparation method thereof
  • Resin-based friction body, resin-based synthetic brake pad and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0049] The preparation method of the resin-based synthetic brake pad is as follows:

[0050] S1. Mix and banbury the raw materials according to the composition of the raw materials to obtain the mixture;

[0051] S2. The mixture is sequentially subjected to a crushing process, a pressing process, and a heat treatment process to obtain a resin-based synthetic brake pad.

[0052] Step 1 specifically includes:

[0053] S11, premix

[0054] Premix barium sulfate, calcium carbonate and graphene nanosheets, and then spray the liquid latex evenly on the mixed material in a pressurized spraying manner to obtain a premix;

[0055] S12. Mixing

[0056] The pre-mixture and other raw materials are pressurized and banburyed together to obtain a mixture.

[0057] Wherein, in step 11, the premixing equipment is a horizontal ribbon mixer, the premixing time of barium sulfate, calcium carbonate and graphene nanosheets is 5min, and the time of spraying liquid latex is 5min, totaling 10min; ...

Embodiment 1

[0073] A resin-based synthetic brake pad includes a resin-based friction body and a steel back.

[0074] The resin-based friction body includes the following components in weight percentage: phenolic resin 10.0wt%, liquid latex 8.0wt%, nitrile rubber powder 4.0wt%, steel fiber 25.0wt%, mineral fiber 4.5wt%, aramid pulp 0.5wt%, graphene nanosheet 1.0wt%, calcined petroleum coke 10.0wt%, molybdenum disulfide 2.0wt%, ferrochrome powder 4.0wt%, cast iron powder 12.0wt%, expanded vermiculite 4.0wt%, barium sulfate 6.0wt% %, calcium carbonate 8.0wt%, vulcanization accelerator 1.0wt%.

[0075] A method for preparing a resin-based synthetic brake pad, comprising the following steps:

[0076] S1. Pre-mixing and banburying the raw materials of the above ratio to obtain a mixture; specifically including:

[0077] S11, premix

[0078] According to the above ratio, add barium sulfate, calcium carbonate and graphene nanosheets into the horizontal ribbon mixer for pre-mixing for 5 minutes...

Embodiment 2～ Embodiment 7

[0091] The composition and preparation method of Examples 2 to 7 are basically the same as those of Example 1, the difference lies in the different amounts of the components of the friction body. The resin-based friction bodies in Examples 2 to 7 are composed of the following components in weight percentage,

[0092] Example 2 3 4 5 6 7 Phenolic resin (wt%) 12 10 8 8 11 9 Liquid Latex (wt%) 8 10 5 5 6 8 Nitrile rubber powder (wt%) 4 5 6 3 3 5 Steel fiber (wt%) 26 24 22 28 20 21 Mineral Fiber (wt%) 4 5 3 4 2 4 Aramid pulp (wt%) 1 1.5 2 0.5 0.1 1.8 Graphene nanosheets (wt%) 1.5 2 5 1 0.5 0.1 Calcined petroleum coke (wt%) 8.5 8 9 10 8.9 12 Molybdenum disulfide (wt%) 2 2 3 1 3 5 Ferrochrome powder (wt%) 5 3 4 6 8 8 Cast iron powder (wt%) 10 11 15 14 12 13 Expanded vermiculite (wt%) 3 4 4 5 5 1 Barium sulfate (wt%) 6 5 5 8 10 6...

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Abstract

The invention provides a resin-based friction body, a resin-based synthetic brake pad and a preparation method thereof, and belongs to the technical field of friction braking. The resin-based frictionbody comprises the following components in percentage by mass: 8-12wt% of phenolic resin, 5-10wt% of liquid latex, 3-6wt% of nitrile rubber powder, 20-28wt% of steel fibers, 2-5wt% of mineral fibers,0.1-2wt% of aramid pulp, 0.1-5wt% of graphene nanosheets, 8-12wt% of calcined petroleum coke, 1-5wt% of molybdenum disulfide, 3-8wt% of ferrochromium powder, 10-15wt% of cast iron powder, 1-5wt% of expanded vermiculite, 5-10wt% of barium sulfate, 5-10 wt% of calcium carbonate and 0.1-2 wt% of a vulcanization accelerator. According to the resin-based friction body, the stability of the friction coefficient in the braking process is effectively improved, particularly the stability of the friction coefficient under different braking pressures is reflected, and the braking process is more stableand comfortable. The invention further provides a resin-based synthetic brake pad which comprises a steel backing and the friction body, and the friction body is fixed to the steel backing.

Description

technical field [0001] The invention relates to the technical field of friction braking, in particular to a resin-based friction body, a resin-based synthetic brake pad and a preparation method thereof. Background technique [0002] The friction body of resin-based synthetic brake pads is mainly composed of three parts: binder, reinforcing material and filler. The commonly used binder is phenolic resin or its modified product, which has the characteristics of wide source, low price and excellent adhesion. However, during the braking process, as the temperature of the brake pads and brake discs increases, the binder softens and decomposes, which will cause thermal decay of the friction body, thereby affecting the stability of the friction coefficient. With the increase of the braking pressure, the braking power also increases accordingly. In the case of high power, the ordinary synthetic brake pads have large fluctuations in friction coefficient, which is not conducive to sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L61/06C08L9/02C08L77/10C08L7/02C08L9/08C08L9/04C08K13/04C08K3/04C08K7/04C08K3/30F16D69/02
CPCC08L61/06C08L7/02C08L9/08C08L9/04F16D69/02F16D2200/0086F16D2200/0095F16D2200/0065F16D2200/0021C08L2205/035C08L2205/16C08K2201/011C08K2201/014C08K2003/3009C08L9/02C08L77/10C08K13/04C08K3/042C08K7/04C08K3/30
Inventor 马林宋呈威杨国栋苏杭张丽娜孟凡顺
Owner 北京浦然轨道交通科技股份有限公司
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