Polytetrafluoroethylene composite material and product preparation method thereof

Abstract

The invention discloses a polytetrafluoroethylene composite material, which comprises one or more of molybdenum disulfide, aluminum sesquioxide, copper powder, graphite, silicon dioxide and stainless steel powder and polytetrafluoroethylene, wherein the polytetrafluoroethylene composite material is a binary polytetrafluoroethylene composite material, which comprises 80 to 99.9 weight percent of the polytetrafluoroethylene, and the balance of other components. A product preparation method for the material comprises the following steps: compounding the materials of polytetrafluoroethylene (PTFE), molybdenum disulfide (MoS2), aluminium oxide (Al2O3), Cu powder, silicon dioxide (SiO2), polyphenylester (PPL), stainless steel powder, carbon fiber (CF), glass fiber (GF) and the like, molding the materials by a mold pressing sintering method, and then mechanically machining the materials to form an L-shaped sealing element.

Description

technical field [0001] The invention relates to composite materials and their preparation, especially the composition and preparation of special engineering materials, specifically a fiber-reinforced polytetrafluoroethylene composite material (KT-L type) suitable for compressor L-shaped seals and its products Preparation. Background technique [0002] Polytetrafluoroethylene resin is an engineering plastic with excellent corrosion resistance, anti-aging, and friction coefficient, but the performance of single-component polytetrafluoroethylene often cannot meet the requirements of mechanical equipment. Main disadvantages: not wear-resistant, poor creep resistance, small thermal conductivity and difficult to dissipate heat. For example, compressor L-shaped seals, products processed with pure PTFE resin cannot meet the service life and performance requirements of the machine. In addition, many polytetrafluoroethylene composite materials are disclosed in the prior art. For sea...

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Problems solved by technology

[0002] Polytetrafluoroethylene resin is an engineering plastic with excellent corrosion resistance, anti-aging and friction coefficient, but the performance of single-component polytetrafluoroethylene often cannot meet the requirements of mechanical equipment

Main disadvantages: not wear-resistant, poor creep resistance, small thermal conductivity, not easy to dissipate heat, etc.

For example, compressor L-shaped seals, products processed with pure PTFE resin cannot meet the service life and performance requirements of the machine

In addition, many polytetrafluoroethylene composite materials are disclosed in the prior art. For sealing materials such as compressor L-shaped seals, these materials often fail to meet the requirements for use. Although some meet the requirements, they are not cost-effective. high

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