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Preparation method of recyclable paper-based friction material

A technology of paper-based friction material and preparation steps, which is applied in the field of friction materials, can solve the problems of friction materials such as heat decay, friction coefficient drop, and short service life, so as to improve mechanical fatigue resistance, surface friction performance, and broad application prospects Effect

Inactive Publication Date: 2019-05-31
刘国春
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Problems solved by technology

[0007] The technical problem mainly solved by the present invention is to provide a recyclable and reused paper base for the disadvantages of poor friction performance of the paper base friction material, serious thermal degradation of the friction material, sharp drop of friction coefficient, and short service life resulting in great waste. Preparation method of friction material

Method used

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[0029] Preparation of the surface modified paper layer: the kraft larch wood pulp with a mass fraction of 35% and the Ye wood pulp with a mass fraction of 40% are mixed to obtain a mixed wood pulp, and the mixed wood pulp is poured into a PFI refiner, Refining for 5 minutes, controlling the degree of beating of the mixed wood pulp to be 30°SR to obtain paper pulp, putting the obtained pulp into papermaking equipment for drying and calendering, and controlling the pressure to be 0.6MPa to obtain a base paper layer;

[0030] Add 80g of phenol, 85mL of formaldehyde solution with a mass fraction of 37% and 1g of sodium hydroxide into the reaction kettle, heat up to 70°C, keep the temperature for 1h, and when cooled to 35°C, put the base paper layer into the reaction kettle for 30min and take out The impregnated base paper layer is put into a low-temperature plasma treatment equipment, and under an argon atmosphere, the control power is 30W, the air pressure is 40Pa, and the treatme...

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Abstract

The invention discloses a preparation method of a recyclable paper-based friction material and belongs to the technical field of friction materials. The surface of a base paper layer is modified by performing polar phenolic resin soaking and low-temperature plasma treatment, so that polarity of the surface of the base paper layer is improved, wettability of resin to the surface of the base paper layer is improved, interface bonding between the resin and the surface of the base paper layer is enhanced, and friction performance is improved. After mullite crystal whisker is arranged alternately on a resin layer and the paper layer in the paper-based friction material, instantaneous temperature of a friction surface is about to be higher under high temperature generated by friction, and a coarse friction surface is formed, so that surface friction performance is improved; after the resin of the paper-based friction material is in recession and contraction when being heated, the radial direction of crystal whisker fiber is exposed to share shear stress received by the paper-based friction material. After friction coefficient of the paper-based friction material declines and when the resin layer of the paper-based friction material does not completely shed off, the paper-based friction material can be recycled and put into a magnetic field orientation motor for treatment to be reused, so that service life of the paper-based friction material is prolonged, and the paper-based friction material has wide application prospect.

Description

technical field [0001] The invention discloses a preparation method of a recyclable and reused paper-based friction material, which belongs to the technical field of friction materials. Background technique [0002] Paper-based friction materials are mainly composed of plant fibers (cotton fibers), reinforcing materials (carbon fibers, aramid fibers), crystal oxide minerals, anti-friction materials (graphite), binders, friction performance modifiers, etc. way of production. Because the fiber-based skeleton material is formed by the papermaking process, it is called "paper-based friction material". Basic process flow: pulping---papermaking---drying---dipping---paper cutting---patch---hot pressing---curing---processing---product. [0003] Paper-based friction material is a key functional material widely used in wet clutches such as construction machinery gearboxes, automobile automatic gearboxes and motorcycles. It is mainly composed of fibers, binders, friction performance ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/00D21H11/04D21H11/00D21H17/48D21H17/36D21H17/67D21H25/06
Inventor 刘国春
Owner 刘国春
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