Synthetic friction material and preparation method and application thereof

A technology of friction material and compounding agent, which is applied in the field of synthetic friction material and its preparation, and can solve the problems of dual wear, unstable friction coefficient, brake noise and strong smell, etc.

Active Publication Date: 2021-09-14
CHINA ACADEMY OF RAILWAY SCI CORP LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the urban rail synthetic friction materials that have been produced and used in China have problems such as unstable friction coefficient, cracks on the surface of the friction body, large braking noise and odor, and serious wear and tear of the pair.

Method used

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  • Synthetic friction material and preparation method and application thereof
  • Synthetic friction material and preparation method and application thereof
  • Synthetic friction material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] This embodiment provides a synthetic friction material, the preparation method of which includes:

[0060] 1. Precipitated barium sulfate 1120g, bauxite 720g, reduced iron powder 560g, wollastonite 800g, diatomite 400g, pineapple leaf fiber 480g, silane coupling agent 100g, aluminate coupling agent 220g, asbestos-free composite Fiber (as inorganic mineral composite fiber) 800g, steel fiber 560g, flake graphite 960g are weighed and then poured into the mixer, the machine speed is set to 200r / min, and the stirring time is 25min to obtain a uniformly mixed composition .

[0061] 2. Mix the above composition with 800g of nitrile rubber, 80g of sulfur, and 480g of boron-modified phenolic resin, and banbury for 12min in a banbury mixer under the condition that the banbury temperature does not exceed 95°C. The banbury pressure is 0.9MPa, and banbury After completion, it is crushed to obtain a friction material mixture, and the crushed particle size is ≤4mm. The friction mate...

Embodiment 2

[0063] This embodiment provides a synthetic friction material, the preparation method of which includes:

[0064] 1. Weigh 1120g of precipitated barium sulfate, 720g of bauxite, 560g of reduced iron powder, 800g of wollastonite, 400g of diatomaceous earth, 480g of pineapple leaf fiber, 130g of silane coupling agent, 190g of aluminate coupling agent, asbestos-free 800g of composite fibers, 560g of steel fibers, and 960g of graphite flakes were poured into the mixing machine, the machine speed was set at 200r / min, and the stirring time was 25min, and a uniformly mixed composition was obtained.

[0065] 2. Mix the above composition with 800g of nitrile rubber, 80g of sulfur, and 480g of boron-modified phenolic resin, and then use a banbury mixer for banburying, banburying for 12min under the condition that the banburying temperature does not exceed 95°C, and the banburying pressure is 0.9MPa, crushed after the banburying is completed to obtain the friction material mixture, the c...

Embodiment 3

[0067] This embodiment provides a synthetic friction material, the preparation method of which includes:

[0068] 1. Weigh 1120g of precipitated barium sulfate, 720g of bauxite, 560g of reduced iron powder, 800g of wollastonite, 400g of diatomaceous earth, 480g of pineapple leaf fiber, 200g of silane coupling agent, 200g of aluminate coupling agent, asbestos-free 800g of composite fibers, 500g of steel fibers, and 960g of graphite flakes were poured into a mixer, the machine speed was set at 200r / min, and the stirring time was 25min to obtain a uniformly mixed composition.

[0069] 2. Mix the above composition with 800g of nitrile rubber, 80g of sulfur, and 480g of boron-modified phenolic resin, and then use a banbury mixer for banburying, banburying for 12min under the condition that the banburying temperature does not exceed 95°C, and the banburying pressure is 0.9MPa, crushed after the banburying is completed to obtain the friction material mixture, the crushed particle siz...

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Abstract

The invention provides a synthetic friction material and a preparation method and application thereof. The synthetic friction material comprises the following components in percentage by mass: 8-10% of nitrile rubber, 0.9-3% of sulfur, 5-7% of boron modified phenolic resin, 10-14% of crystalline flake graphite, 8-10% of bauxite, 8-10% of wollastonite, 3-5% of diatomite, 6-7% of reduced iron powder, 12-15% of precipitated barium sulphate, 5-7% of pineapple leaf fibers, 6-8% of steel fibers, 2-4% of a coupling agent combination agent and 7-10% of inorganic mineral fibers. The sum of the mass percentages of all the components is 100%. The coupling agent combination agent comprises a silane coupling agent and an aluminate coupling agent. The invention further provides application of the synthetic friction material in synthetic friction materials for urban rail vehicles. The synthetic friction material provided by the invention has the advantages of environmental protection, high mechanical strength, low compression modulus, small dual wear, low abrasion and the like.

Description

technical field [0001] The invention relates to the technical field of urban rail synthetic friction materials, in particular to a synthetic friction material and its preparation method and application. Background technique [0002] Synthetic friction material is a component material that relies on friction to perform braking functions. It mainly absorbs or transmits power through friction. Synthetic friction material is a polymer ternary composite material, which is formed by vulcanization and pressing of three major components: polymer binder, reinforcing fiber and friction performance regulator. This material is characterized by good friction coefficient and wear resistance, as well as certain heat resistance and mechanical strength, which can meet the performance requirements of frequent braking of urban rail vehicles. [0003] Since synthetic friction material products are under high temperature conditions for a long time during work, most of the reinforcing fibers in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/02C08L61/14C08L97/02C08K3/06C08K3/30C08K3/22C08K7/26C08K7/00C08K3/34C08K3/08C08K7/06C08K9/06C08K9/04
CPCC08L9/02C08K2003/2227C08K2003/3045C08L2205/16C08K2003/0856C08L61/14C08L97/02C08K3/06C08K3/30C08K3/22C08K7/26C08K7/00C08K3/34C08K3/08C08K7/06C08K9/06C08K9/04
Inventor 张静张国文孙振龙王晔吴智强吕宝佳焦标强
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD
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