阅读说明：本技术 一种高弹性摩擦材料以及制备方法 (High-elasticity friction material and preparation method thereof ) 是由 杜乐庆 于 2019-10-24 设计创作，主要内容包括：本发明公开了一种高弹性摩擦材料以及制备方法,属于技术领域,丁腈橡胶占比10％～20％,酚醛树脂占比5％～15％,摩阻材料占比30％～50％,减摩材料占比10％～20％,橡胶配合剂占比3％～5％。本发明产品内部便具有两种硬度和弹性不同的材料,而且交错分布,从而能够使该摩擦材料在工作中能很好地吸收制动时的冲击能量,获得较高的摩擦系数,减少或消除制动噪音,由于氟橡胶耐高温性能优于丁腈橡胶,产品的耐温性能得到提升,由于材料为颗粒状,避免了生产车间扬尘对工人的身体伤害。(The invention discloses a high-elasticity friction material and a preparation method thereof, belonging to the technical field, wherein the proportion of nitrile rubber is 10-20%, the proportion of phenolic resin is 5-15%, the proportion of friction material is 30-50%, the proportion of antifriction material is 10-20%, and the proportion of rubber ingredient is 3-5%. The interior of the product of the invention is provided with two materials with different hardness and elasticity, and the two materials are distributed in a staggered way, so that the friction material can well absorb the impact energy during braking in work, obtain higher friction coefficient, reduce or eliminate the braking noise, because the high temperature resistance of the fluororubber is better than that of the nitrile rubber, the temperature resistance of the product is improved, and because the materials are granular, the harm of dust in a production workshop to the body of a worker is avoided.)

1. A highly elastic friction material characterized by: the composite material consists of the following raw materials in percentage: the proportion of the nitrile-butadiene rubber is 10-20%, the proportion of the phenolic resin is 5-15%, the proportion of the friction material is 30-50%, the proportion of the antifriction material is 10-20%, and the proportion of the rubber ingredient is 3-5%;

wherein the rubber compounding agent comprises sulfur, a vulcanization accelerator and an anti-aging agent.

2. A highly elastic friction material according to claim 1, characterized in that: the nitrile rubber is prepared from butadiene and acrylonitrile by an emulsion polymerization method.

3. A highly elastic friction material and method of making as defined in claim 1 wherein: the friction material comprises glass fiber, steel fiber, carbon fiber, graphite fiber, aramid fiber, ultra-high molecular weight polyethylene fiber, boron fiber, inorganic mineral fiber and cotton fiber.

4. A method for preparing a highly elastic friction material according to any of claims 1 to 3, characterized by comprising the steps of:

step 1: mixing the formula materials by an internal rubber mixing mill;

step 2: crushing to obtain 2-4 mm diameter for later use;

and step 3: mixing the particles prepared from the formula materials with the prepared modified particles according to a certain proportion;

and 4, step 4: weighing the stirred material;

and 5: loading the weighed material into a mold;

step 6: pressing on a vulcanizing machine;

and 7: curing and forming;

and 8: curing in an oven;

and step 9: and (5) grinding a finished product.

5. The method for preparing a high elastic friction material according to claim 4, wherein: the mixing ratio of the particles prepared by the formula materials in the step 3 to the prepared modified particles is 0.1-1: 0.2.

6. A highly elastic friction material and method of making as defined in claim 1 wherein: pressing at 170 ℃ on a vulcanizer in step 6, and secondary curing at 230 ℃ in an oven for 12-24h in step 8.

Technical Field

The invention relates to a friction material, in particular to a high-elasticity friction material, and also relates to a preparation method of the friction material, in particular to a preparation method of the high-elasticity friction material.

Background

In the first type of prior art, a closed rubber mixing mill or an open rubber mixing mill is adopted to subject the weighed materials in the formula to mixing, the components in the materials are in a uniform distribution state, the hardness of each part in the product is consistent, the impact energy during braking can not be well absorbed, the braking noise is easy to generate, the product contains too much nitrile rubber, the high temperature resistance is not ideal, the heat fading is caused by the friction heating in the using process of the product, the friction coefficient is obviously reduced, and the braking effect is influenced.

The second type of prior art adopts powdered nitrile rubber or rubber tire powder as a modified elastic material, and has the disadvantages of unsatisfactory high temperature resistance, heat fading caused by friction heating in the use process of the product, dust emission in the production process to pollute the working environment and harm to the body of production workers due to the powdery material.

Therefore, it is necessary to design a high elastic friction material and a preparation method thereof, which can solve the above problems.

Disclosure of Invention

The invention mainly aims to provide a high-elasticity friction material and a preparation method thereof, fluororubber particles are used as an elasticity modifying material, and because the vulcanization system of fluororubber is different from the vulcanization system of nitrile butadiene rubber, in the vulcanization molding process of the product, the fluororubber particles can still keep the elasticity and hardness of the fluororubber particles, the hardness of the material is lower than that of the material in the formula, and the elasticity of the material is higher than that of the material in the formula, so that the two materials with different hardness and elasticity are arranged in a staggered way in the product, thereby the friction material can well absorb the impact energy during braking in work, obtain higher friction coefficient, reduce or eliminate the braking noise, because the high temperature resistance of the fluororubber is better than that of the nitrile rubber, the temperature resistance of the product is improved, and because the fluororubber is granular, the harm of dust raised in a production workshop to the bodies of workers is avoided.

The purpose of the invention can be achieved by adopting the following technical scheme:

a high-elasticity friction material is composed of the following raw materials in percentage: the proportion of the nitrile-butadiene rubber is 10-20%, the proportion of the phenolic resin is 5-15%, the proportion of the friction material is 30-50%, the proportion of the antifriction material is 10-20%, and the proportion of the rubber ingredient is 3-5%; wherein the rubber compounding agent comprises sulfur, a vulcanization accelerator and an anti-aging agent.

Preferably, the nitrile rubber is prepared from butadiene and acrylonitrile by an emulsion polymerization method.

Preferably, the friction material comprises glass fiber, steel fiber, carbon fiber and graphite fiber, aramid fiber, ultra-high molecular weight polyethylene fiber, boron fiber, inorganic mineral fiber and cotton fiber.

A preparation method of a high-elasticity friction material comprises the following steps: mixing the formula materials by an internal rubber mixing mill; crushing to obtain 2-4 mm diameter for later use; mixing the particles prepared from the formula materials with the prepared modified particles according to a certain proportion; weighing the stirred material; loading the weighed material into a mold; pressing on a vulcanizing machine; curing and forming; curing in an oven; and (5) grinding a finished product.

Preferably, the mixing ratio of the particles prepared from the formula materials in the step 3 to the prepared modified particles is 0.1-1: 0.2.

Preferably, the pressing is carried out on a vulcanizer at 170 ℃ in step 6 and the secondary curing is carried out in an oven at 230 ℃ for 12 to 24 hours in step 8.

The invention has the beneficial technical effects that:

according to the high-elasticity friction material and the preparation method thereof, the fluororubber particles are used as the elastic modified material, and the vulcanization system of the fluororubber is different from that of the nitrile rubber, so that the fluororubber particles can still keep the elasticity and hardness of the fluororubber particles during vulcanization molding of a product, the hardness of the fluororubber particles is lower than that of the fluororubber particles in a formula, and the elasticity of the fluororubber particles is higher than that of the fluororubber particles in the formula, so that the fluororubber particles have two materials with different hardness and elasticity in the product, and the fluororubber particles are distributed in a staggered manner, so that the friction material can well absorb impact energy during braking in work, obtain a higher friction coefficient, reduce or eliminate braking noise, and avoid the harm of dust raised in a production workshop to the body of workers due to the fact that the fluororubber has higher high-temperature.

Drawings

FIG. 1 is a flow chart illustrating the preparation of a preferred embodiment of a method for preparing a highly elastic friction material according to the present invention.

Detailed Description

In order to make the technical solutions of the present invention more clear and definite for those skilled in the art, the present invention is further described in detail below with reference to the examples and the accompanying drawings, but the embodiments of the present invention are not limited thereto.