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Asbestos-free composite enhancement fibre for friction material and producing technique thereof

A friction material and composite reinforcement technology, applied in other chemical processes, chemical instruments and methods, etc., can solve problems such as poor mixing, poor dispersion, and high price, and achieve good reinforcement, stable friction coefficient, and simple use Effect

Inactive Publication Date: 2010-06-09
韩德忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Asbestos has a certain history as a reinforcing fiber for friction materials. Although there are many substitute fibers for asbestos, there are still some problems to be solved: easy agglomeration, poor dispersion, poor mixing, high prices, etc.
For example, although the Kevlar fiber produced by the Dupont company in the United States has better performance, it is very expensive and is currently only used in high-end cars.

Method used

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  • Asbestos-free composite enhancement fibre for friction material and producing technique thereof
  • Asbestos-free composite enhancement fibre for friction material and producing technique thereof
  • Asbestos-free composite enhancement fibre for friction material and producing technique thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Raw mineral rock wool or granular wool can be purchased or prepared from the market. The preparation process:

[0025] 200kg of basalt, 600kg of diabase, 110kg of limestone, 80kg of dolomite, and 20kg of metallurgical coke are selected as the main materials, which are spun through a high-temperature furnace over 1000°C and subjected to surface treatment. It is melted at high temperature to form fibers, cut into fibers with a length of 10-20mm, and then washed with water and slag removed by a centrifuge to control the content of fiber slag balls to no more than 0.5-1%, and then made into main fibers.

[0026] like figure 1 Shown, take 600kg of the main fiber obtained, 80kg of hemp fiber of selected plant fiber, and 60kg of wood fiber, and pre-cut the hemp fiber and wood fiber to 8-15mm, and 100kg of mica powder with a particle size of 0.005 μm is used as raw material. Mix the raw materials evenly in a high-speed mixer at 2000-2500 rpm to form mixed fibers, and then ente...

Embodiment 2

[0028] The main fiber preparation method used is the same as in Example 1. Take 700 kg of main fiber, 100 kg of hemp fiber, and 30 kg of wood fiber. 2000~2500 RPM high-speed mixer to form mixed fibers evenly, enter the tumble dryer for mixing and drying, spray 10kg of silane coupling agent during mixing and drying, drying temperature 110℃, drying time 2 Hours, the composite reinforcing fiber of the present invention is obtained, and the obtained fiber is cut to the required specification, and the obtained fiber should be packaged waterproofly.

Embodiment 3

[0030] Commercially available mineral rock wool or granular cotton is cut according to specifications, then washed with water and slag removed by a centrifuge, and the content of fiber slag balls is controlled not to exceed 0.5-1%, and the main fiber is obtained.

[0031] Get 800kg of main fiber, 30kg of hemp fiber, 80kg of wood fiber, hemp fiber and wood fiber pre-cut to 8-15mm, and 50kg of mica powder with a particle size of 0.004μm as raw material, and put it in a high-speed mixer at 2000-2500 rpm Uniform, form mixed shape fiber, enter in the tumble dryer and carry out mixing and drying, spray into hydroxypropyl cellulose 50kg in the process of mixing and drying, drying temperature 140 ℃, drying time 1.2 hours, promptly obtain the present invention's Composite reinforcing fibers, the obtained fibers are then cut to the required specifications, and the obtained fibers should be packaged waterproofly.

[0032] The brake friction material reinforced with the above-mentioned co...

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Abstract

The invention provides a new non-asbestos composite reinforced fiber of friction material with low cost and a relative production method, wherein the fiber is environment-friendly, degradable and non-pollution, which can improve the impact strength of friction material. When in use at high temperature, the friction factor is stable with low abrasion. The production method is simple, cheap and suitable for producing friction material. The non-asbestos composite reinforced fiber for friction material contains mine rock wool or gravel-shaped wool of 50-80 parts by weight, fibrilia of 2-10 parts by weight, wood fiber of 3-8 parts by weight, mica powder or ceramic powder of 2-20 parts by weight, and coupling agent or compatibilizer of 1-5 parts by weight. The production method comprises preparing the materials, cutting mine rock wool or gravel-shaped wool, washing via centrifugal machine, removing slag to obtain main fiber, controlling the slag content lower than 0.5-1%, adding fibrilia, wood fiber and mica powder or ceramic powder to be mixed at high speed, drying and spraying coupling agent or compatibilizer, while the drying temperature is 105 to 150 DEG C and the drying time is 1-2h, to obtain composite reinforced fiber.

Description

technical field [0001] The invention relates to a non-asbestos composite fiber, specifically a low-cost composite reinforcing fiber for non-asbestos friction material and its production process, which belongs to the reinforcing fiber of brake friction material and is mainly used for filling in automobile friction plates to Enhance the friction resistance of the product. Background technique [0002] Reinforcing fiber is an important component of friction material, it is the main load-bearing unit, and it acts as a skeleton, so that the material has a certain strength and toughness, and can withstand mechanical effects such as impact, shearing, stretching, etc. without cracks, fractures, collapses, etc. Mechanical damage has an important impact on the friction and wear properties of materials. Reinforced fibers should meet the following performance requirements: sufficient strength and modulus and good toughness; stable friction coefficient and appropriate friction loss in a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/10C08J5/14C09K3/14
Inventor 韩德忠
Owner 韩德忠
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