Novel bio-based high-strength wear-resistant nylon composite material and preparation method thereof

Abstract

The invention discloses a novel bio-based high-strength wear-resistant nylon composite material and a preparation method thereof. The composite material is prepared from the following raw materials in percentage by mass: 70-80% of nylon, 3-5% of a wear-resistant agent, 10-20% of a reinforcing agent, 0.2-0.5% of an antioxidant and 0.2-0.5% of color master batch. The preparation method mainly comprises the following steps: blending and extruding a strip-shaped blend by a double-screw extruder or an injection molding machine, cooling by circulating water, and granulating in a granulator to obtain the composite nylon particles. The wear-resistant material has the characteristics of high temperature resistance, wear resistance and good thermal decay resistance, is simple in preparation process, and effectively solves the problems of high wear rate, unstable friction coefficient, lower impact strength and the like of similar friction materials at high temperature in comparison with the conventional common method for improving the wear resistance of nylon by adding assistants such as PTFE and molybdenum disulfide; and meanwhile, the bio-based composite material has good economic benefits and environmental friendliness.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a novel bio-based, high-strength wear-resistant nylon composite material and a preparation method thereof. Background technique [0002] Wear-resistant materials have been widely used in brake friction materials and clutch driven discs of rail vehicles. They are very critical components for deceleration and start-stop functions. The kinetic energy of the machine is converted into heat energy through friction during driving. Or other forms of energy, so as to achieve the purpose of braking. As the working conditions of friction materials are becoming more and more severe, at the same time, with the increasing attention at home and abroad on the impact of friction materials on human health, the surrounding environment and energy resources during the use of friction materials in various fields, in the production of enterprises In addition to good and moderate friction coefficient, ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a bio-based multi-fiber composite reinforced wear-resistant material for the lack of single fiber reinforcement and some problems of similar friction products, which reduces the wear rate of high-temperature friction materials and stabilizes friction under high-temperature conditions. coefficient of friction, significantly improving its resistance to thermal recession

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