PTFE resin composite material of sealing ring with high thermal conductivity used for rotating shaft and preparation method thereof

• Main Authors: CHEN PEIMIN, SUN JIAQING, CHEN YIN, YANG YE, SUN KEYUAN, YANG WENGUANG, CHEN ZHAOXI, JIN YU, JIAO XIAODONG
• Format: Patent
• Language: Chinese; English
• Published: 15.12.2017
• Subjects: ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

The invention discloses a PTFE resin composite material of a sealing ring with high thermal conductivity used for a rotating shaft. The PTFE resin composite material consists of the following components in percentage by mass: 5%-15% of carbon fiber, 5%-8% of nano-silicon carbide, 3%-10% of indium nitride, 2%-4% of alumina, 1%-2% of a coupling agent and the balance of PTFE. The invention also discloses a preparation method of the PTFE resin composite material. In the PTFE resin composite material and the preparation method disclosed by the invention, by adding the carbon fiber to the PTFE, the tensile, compressive and flexural moduli of the material can be increased, the thermal expansion coefficient can be decreased, and the potential hazard of leakage caused by expansion after the temperature rises can be reduced; meanwhile, the creep deformation can also be reduced, the hardness can be improved, and the thermal conductivity is increased simultaneously, so that friction heat can be quickly transferred out. T