Preparation method of paper-based friction material

A technology of paper-based friction materials and coatings, which is applied in the preparation of paper-based friction materials for vehicles, and in the field of preparation of paper-based friction materials for vehicles based on the coating method. problems, achieve the effects of improving the environment, stabilizing mechanical properties, and reducing the amount of heavy metals used

Active Publication Date: 2019-06-04
LONGYOU COUNTY JINLONG PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mold required by this kind of molding method is expensive, and the prepared friction material is easy to drop powder, and the wear rate is relatively high during use. Therefore, it is necessary to explore a production method that can effectively improve the economic efficiency of production and increase the service life of the friction material. Value and Application Significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Mixing: Fully mix 4g steel fiber, 1g carbon fiber, 7g aramid fiber, and 20g phenolic resin in a mixer; then add 35g heavy calcium carbonate, 25 parts calcined kaolin and 8g graphite to mix and disperse evenly for later use .

[0023] (2) Coating preparation: Weigh 3g of the dispersant sodium hexametaphosphate in deionized water, disperse at a speed of 1100r / mim for 10min through a high-speed shear disperser, and then add the mixture in step (1) into the disperser to High speed shear dispersion at 3500r / min for 30min, then weigh 20g of nitrile latex and continue to shear and disperse at a speed of 4000r / min for 20min, observe the state of the coating and add an appropriate amount of silicone defoamer dropwise, then reduce the shear rate, Add 1.5g of nano-alumina to shear and disperse at a speed of 1100r / min for 10min, and finally add an appropriate amount of 2% dilute NaOH solution dropwise to adjust the pH of the coating to 10, and obtain the desired high-performanc...

Embodiment 2

[0026] (1) Mixing: Fully mix 8g steel fiber, 2g carbon fiber, 8g aramid fiber, and 25g phenolic resin in a mixer; then add 25g heavy calcium carbonate, 25 parts calcined kaolin and 7g graphite to mix and disperse evenly for later use .

[0027] (2) Coating preparation: Weigh 3g of the dispersant sodium hexametaphosphate in deionized water, disperse at a speed of 1100r / mim for 10min through a high-speed shear disperser, and then add the mixture in step (1) into the disperser to High speed shear dispersion at 3500r / min for 30min, then weigh 20g of nitrile latex and continue to shear and disperse at a speed of 4000r / min for 20min, observe the state of the coating and add an appropriate amount of silicone defoamer dropwise, then reduce the shear rate, Add 1.5g of nano-alumina to shear and disperse at a speed of 1100r / min for 10min, and finally add an appropriate amount of 2% dilute NaOH solution dropwise to adjust the pH of the coating to 10, and obtain the desired high-performanc...

Embodiment 3

[0030] (1) Mixing: Fully mix 4g steel fiber, 2g carbon fiber, 8g aramid fiber, and 20g phenolic resin in a mixer; then add 50g heavy calcium carbonate, 10 parts calcined kaolin and 6g graphite to mix and disperse evenly for later use .

[0031] (2) Coating preparation: Weigh 3g of the dispersant sodium hexametaphosphate in deionized water, disperse at a speed of 1100r / mim for 10min through a high-speed shear disperser, and then add the mixture in step (1) into the disperser to High speed shear dispersion at 3500r / min for 30min, then weigh 20g of nitrile latex and continue to shear and disperse at a speed of 4000r / min for 20min, observe the state of the coating and add an appropriate amount of silicone defoamer dropwise, then reduce the shear rate, Add 2g of carboxymethyl cellulose to shear and disperse at a speed of 1100r / min for 10min, and finally add an appropriate amount of 2% dilute NaOH solution dropwise to adjust the pH of the coating to 10, and obtain the required high-...

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Abstract

The invention discloses a preparation method of a paper-based friction material. The friction material is mainly composed of plant fiber paper and a functional coating. The preparation method of the friction material mainly relates to high-performance coating design, paper surface coating process adjustment, drying and finishing process and the like, and finally a friction coating is formed, and the paper-based friction material with a certain thickness is obtained after being coated for a plurality of times. According to the method, a coating method is innovatively used for replacing a traditional hot-pressing method to prepare an automotive friction lining sheet, the automotive friction lining sheet is riveted or adhered to an aluminum alloy brake shoe or clutch, forming without a mold can be realized, the binding property between coated paper base paper and a coating is good, the phenomenon of shed hair and powder is not easy to generate, the preparation process is simple, the production cost is low, and the thickness of the base paper and the thickness of the coating can be regulated and controlled, so that the preparation of the paper-based friction material has certain flexibility, and the requirements of different motor vehicles on friction materials can be met to a great extent.

Description

technical field [0001] The invention relates to a method for preparing special paper, in particular to a method for preparing a paper-based friction material for vehicles, and in particular to a method for preparing paper-based friction materials for vehicles based on a coating method. Background technique [0002] Friction material is composed of polymer binder (resin and rubber), reinforcing fiber and friction performance modifier and other compounding agents. It is a product made through a series of production and processing. It has a good friction coefficient and durability. Wear performance, certain heat resistance and mechanical strength can meet the performance requirements of vehicle or mechanical transmission and braking, and are widely used in various construction machinery equipment such as automobiles, trains, airplanes, and oil drilling rigs. At present, the production process of friction materials is mainly dry mixing, and then one-time hot pressing through a m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/00D21H19/38D21H19/40D21H19/44D21H19/62D21H21/08D21H21/12D21H21/06D21H19/34
Inventor 唐艳军王小宇叶科丽毛江淳
Owner LONGYOU COUNTY JINLONG PAPER
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