Sealing strip PTFE resin composite material with high temperature resistance in high-temperature region and preparation method thereof

Abstract

The invention discloses a sealing strip PTFE resin composite material with high temperature resistance in a high-temperature region. The sealing strip PTFE resin composite material contains the following components by weight percent: 9-14% of carbon fiber, 6-15% of copper powder, 3-10% of modified imvite and the balance of PTFE, wherein the modified imvite is the Na-montmorillonite modified with ethylene benzyl dimethyl octadecyl ammonium chloride. The invention also discloses a preparation method thereof. According to the invention, the carbon fiber is added, so that the coefficient of thermal expansion can be reduced and the leakage hidden danger caused by expansion after temperature rise can be reduced; creep can be reduced, the hardness can be increased and the heat resistance of the material can be increased; the addition of the copper powder is beneficial to the reduction of the abrasion of the material, the reduction of creep, the reduction of deformation under load and the promotion of the thermal stability and conductivity of a thermal PTFE composite material; the modified imvite is capable of forming uniform nanoscale dispersing in PTFE, so that the composite material has higher heat-resisting stability; the sealing strip with high temperature resistance in the high-temperature region can be used for a long term under the environment of 300 DEG C without deformation.

Description

technical field [0001] The invention relates to a PTFE resin composite material for a high-temperature-resistant high-temperature zone sealing strip for an air scroll compressor on a new energy vehicle and a preparation method thereof, and belongs to the field of composite materials. Background technique [0002] Polytetrafluoroethylene (PTFE) is a polymer material with excellent comprehensive properties. It has excellent high and low temperature resistance and chemical corrosion resistance, and has excellent dielectric properties, extremely small friction coefficient and good thermal stability. It can be used in- Long-term use at 260°C~260°C, but pure PTFE has disadvantages such as cold flow, poor dimensional stability, low dielectric strength, and large wear. [0003] New energy vehicles generally use air scroll compressors to provide compressed air for the vehicle's braking system, door opening and closing structure, etc. The air scroll compressor is a compressor that co...

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Problems solved by technology

[0002] Polytetrafluoroethylene (PTFE) is a polymer material with excellent comprehensive properties. It has excellent high and low temperature resistance and chemical corrosion resistance, and has excellent dielectric properties, extremely small friction coefficient and good thermal stability. It can be used in- Long-term use at 260°C~260°C, but pure PTFE has disadvantages such as cold flow, poor dimensional stability, low dielectric strength, and large wear.

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