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Flexible-paper-base friction material

A paper-based friction material, flexible technology, applied in papermaking, synthetic cellulose/non-cellulose material pulp/paper, textiles and papermaking, etc., can solve problems such as poor flexibility, achieve good flexibility, improve flexibility, improve The effect of friction and wear properties

Active Publication Date: 2007-08-29
陕西航沣新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the disadvantage of poor flexibility of the existing paper-based friction materials in the bending working state, the present invention provides a flexible paper-based friction material, which has both flexibility and good friction and wear properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: Take flexible reinforcing fiber: Kevlar fiber 3kg, carbon fiber: polyacrylonitrile-based carbon fiber 11kg, pitch-based carbon fiber 9kg, other fibers: cellulose fiber 4kg, friction performance regulator 10kg, filler 15kg, flexible binder: 120 Purpose 2kg of nitrile rubber powder, brittle binder: 20kg of nitrile rubber modified phenolic resin, put the above materials into appropriate amount of water according to the papermaking method, evenly disperse them and add them to the papermaking equipment for molding, drying, and cutting After forming an appropriate size of the friction plate, impregnate the cashew nut shell oil modified phenolic resin-ethanol solution so that the mass percentage reaches 26%, dry it, and heat-press and solidify it at a temperature of 170°C and a pressure of 7.0MPa. After machining, it can be obtained For the flexible paper-based friction material, the minimum bending radius of curvature of this flexible paper-based friction materia...

Embodiment 2

[0018] Embodiment 2: Get flexible reinforcing fiber: carbon fiber pre-oxidized wire 3kg, carbon fiber: pitch-based carbon fiber 17kg, other fibers: plant fiber 22kg, friction performance regulator 13kg, filler 18kg, flexible binder: 180 mesh styrene-butadiene rubber powder 4kg , Brittle binder: phenolic resin 25kg, according to the papermaking method, put the above materials into an appropriate amount of water, evenly disperse them, add them to the papermaking equipment for molding, dry them, cut them into appropriate friction plate sizes, and spray cashew nut shells Oil-modified phenolic resin-ethanol solution to make the mass percentage reach 12.5%, dry, heat press and solidify at a temperature of 170°C and a pressure of 7.0MPa, and obtain a flexible paper-based friction material after machining. The minimum bending radius of curvature of the friction material is 6.0cm, the coefficient of dynamic friction is 1.20-1.26, the coefficient of static friction is 0.16, and the wear ...

Embodiment 3

[0019] Embodiment 3: Take flexible reinforcing fiber: Kevlar fiber 2kg, carbon fiber pre-oxidized silk 3kg, carbon fiber: polyacrylonitrile-based carbon fiber 14kg, other fibers: asbestos-free mineral fiber 25kg, friction performance regulator 16kg, filler 21kg, flexible binder : 6kg of 240-mesh fluororubber powder, brittle binder: cashew nut shell oil modified phenolic resin 30kg, put the above materials into an appropriate amount of water according to the papermaking method, and evenly disperse them, then add them to the papermaking equipment for molding, drying, and cutting After being taken into an appropriate size of the friction sheet, glue is sprayed, heat-pressed and solidified into shape, and a flexible paper-based friction material is obtained after machining.

[0020] The formula of embodiment 4~6 sees the following table. Silicone rubber is also selected as the flexible adhesive; boron-modified phenolic resin is also selected as the brittle adhesive.

[0021] In o...

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Abstract

The invention discloses a soft paper based friction material that contains 3-7wt% flexibility reinforcement fiber, 5-20wt% carbon fiber, 4-25wt% other fiber, 2-20wt% flexibility adhesive, 20-44wt% friability adhesive, 10-25wt% frictional properties regulator, and 15-30wt% filling material. The invention has good flexibility, and improved frictional wear ability of the paper base friction material. The minimum bending radius of curvature is 6.0-6.8cm, and good mechanical strength and thermal endurance.

Description

technical field [0001] The invention relates to a flexible paper-based friction material, which is especially suitable for use as a paper-based friction material for automatic transmission brake bands. Background technique [0002] Paper-based friction materials generally work in lubricating oil medium. In order to obtain good torque transmission and braking effects, paper-based friction materials require high thermal stability, good physical and mechanical properties, high and stable dynamic friction coefficient, low static friction coefficient and small wear rate, while The acquisition of these properties depends on the composition of the material, as well as on the interface structure, porosity and resilience of the material. Therefore, paper-based friction materials are usually composed of reinforcing fibers, friction modifiers, binders and fillers. Among the reinforcing fibers and binders for paper-based friction materials, there are many types of reinforcing fibers a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/14D21H13/50D21H21/14D21H13/26
Inventor 李贺军付业伟齐乐华李克智
Owner 陕西航沣新材料有限公司
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