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Non-asbestos paper-based friction material

A paper-based friction material, asbestos-free technology, applied in the field of paper-based friction materials, can solve the problems of limited use, poor heat resistance and non-wear resistance of pulp fibers, and achieve good compatibility, high strength and modulus, soft texture effect

Inactive Publication Date: 2010-08-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, pulp fiber has poor heat resistance and is not wear-resistant. Paper-based friction materials made of pulp fiber alone cannot be applied in practice.
The current paper-based friction materials are all added with asbestos with good heat resistance and wear resistance, but because asbestos is listed as one of the ten strong carcinogenic industrial raw materials, many countries restrict its use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A non-asbestos paper-based friction material, which is composed of: 30% pulp, 7% aramid fiber, 15% glass fiber, 10% china clay, 15% alumina, 10% graphite, and phenolic resin according to the mass percentage 13%.

[0014] It is prepared according to conventional methods, and its technological process is as follows: raw material processing → batching → beating → papermaking → pressing → impregnation → heat treatment. The clutch surface made of the paper-based friction material of this example was tested on an oil-immersed clutch testing machine, and the friction performance was equivalent to that of the asbestos-containing paper-based friction material, and the wear rate was 1.39×10 -5 mm 3 ·J -1 , lower than paper-based friction materials containing asbestos.

Embodiment 2

[0016] A non-asbestos paper-based friction material, which is composed of: 34% pulp, 5% aramid fiber, 13% glass fiber, 12% china clay, 13% alumina, 9% graphite, phenolic resin 14%. The clutch surface made of the paper-based friction material of this embodiment is tested on an oil-immersed clutch testing machine, and the friction performance is equivalent to that of the asbestos-containing paper-based friction material; and the wear rate is 1.42×10 -5 mm 3 ·J -1 , lower than paper-based friction materials containing asbestos.

Embodiment 3

[0018] A non-asbestos paper-based friction material, which is composed according to the mass percentage: 40% pulp, 3% aramid fiber, 10% glass fiber, 11% china clay, 12% alumina, 8% graphite, and 16% phenolic resin %. The clutch surface made of the paper-based friction material of this example is tested on an oil-immersed clutch testing machine, and the friction performance is equivalent to that of the asbestos-containing paper-based friction material, and the wear rate is 1.46×10 -5 mm 3 ·J -1 , lower than paper-based friction materials containing asbestos.

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Abstract

The invention relates to paper friction material, in particular to paper friction material without asbestos, which is formed with raw materials with the proportion of weight percentage content that 30-40% paper pulp, 3-7% aramid fiber, 10-17% glass fiber, 9-15% porcelain clay, 12-15% aluminum oxide, 8-10% graphite and 11-16% phenol resin. The invention overcomes the weaknesses which are caused bytraditional paper friction material which mostly comprises asbestos, can be used safely without public hazard. Clutch facing which is prepared by the paper friction material of the invention is tested on a wet clutch testing machine showing that the friction property is equivalent to the paper friction material with asbestos, but the rattler loss 1.39*10-5-1.46*10-5mm3J-1 is lower than the rattler loss of asbestos paper friction material 1.50*10-5mm3J-1, which is especially suitable to be larger power wet type friction torque which has larger friction pair transmission.

Description

technical field [0001] The invention relates to a paper-based friction material, in particular to an asbestos-free paper-based friction material. Background technique [0002] Due to the fast wear of the friction plate, the dry clutch needs to be adjusted frequently, and the operating force is large, so it cannot meet the requirements of high-power construction machinery. Paper-based friction material is a material specially used for friction in oil. The clutch plate made of it, after the initial adjustment of the working gap, does not need to be adjusted after running-in or wear; and it can be changed by increasing or decreasing the number of clutch plates. clutch capacity. Therefore, clutches with large energy capacity are often used as friction devices working under heavy loads, such as construction machinery, agricultural machinery, and vehicles. Since the friction of the paper-based friction material occurs in the oil medium, there is an oil film between the friction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/14C08J5/20C08L61/06C08K7/14C08K3/22C08K3/04C08K3/34
Inventor 章少阳李元元
Owner SOUTH CHINA UNIV OF TECH
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