Polytetrafluoroethylene composite material and preparation method thereof
A polytetrafluoroethylene and composite material technology, which is applied in the field of polytetrafluoroethylene composite materials and its production, can solve the problems of poor wear resistance, low wear rate and friction coefficient, and achieves improved mechanical properties and wear resistance. Effects of friction coefficient, good mechanical properties and wear resistance
Inactive Publication Date: 2012-10-10
HANGZHOU BRANCH ZHEJIANG GEELY AUTOMOBILE RES INST +2
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Although the properties of the existing PTFE composite materials are constantly being improved, the wear resistance of the existing PTFE composite materials is still poor, and it c
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A polytetrafluoroethylene composite material is prepared by steps of mixing polytetrafluoroethylene powders, polyimide powders and graphite powders to prepare a mixture and subjecting the mixture to baking, cold pressing, sintering and cooling. The prepared polytetrafluoroethylene composite material comprises polytetrafluoroethylene, polyimide and graphite, wherein the mass percent of the polytetrafluoroethylene is between 65% and 75%, the mass percent of the polyimide is between 17% and 22%, and the mass percent of the graphite is between 7% and 13%. The polytetrafluoroethylene composite material has low friction coefficient and wear rate so that the mechanical property and abrasion resistance are improved.
Description
Technical field [0001] The invention relates to a polytetrafluoroethylene composite material, in particular to a polytetrafluoroethylene composite material with low friction coefficient and wear rate and a manufacturing method thereof. Background technique [0002] Polytetrafluoroethylene (PTFE) is a highly crystalline polymer of tetrafluoroethylene monomer. It is a white waxy thermoplastic with high temperature resistance, good chemical properties, low friction coefficient and good dielectric properties. These advantages make polytetrafluoroethylene widely used. However, PTFE also has many disadvantages, such as poor mechanical properties, large linear expansion coefficient, large molding shrinkage, difficult secondary processing, low hardness, easy wear, large friction coefficient, and creep resistance. Poor, easy to cold flow and so on. In order to improve and overcome the defects of pure PTFE, people have been working on the modification of PTFE to obtain PTFE composit...
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Inventor 宋伟马芳武赵福全
Owner HANGZHOU BRANCH ZHEJIANG GEELY AUTOMOBILE RES INST
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