The PTFE process is an important method of creating a high quality material for a wide range of applications. It has excellent dielectric properties and near universal chemical resistance. PTFE is used in applications including insulation for wiring in aircraft and computers. However, it requires special processing techniques to produce a high-quality PTFE.
To produce a high-quality PTFE, it is important to find optimal parameters for the PTFE sintering process. This paper presents the results of an experiment conducted to investigate the sintering of PTFE, the thermal properties of the sintering furnace, and the relationship between relevant physical quantities and temperature.
Temperature of sintering is a critical factor in determining the phase transition temperature of PTFE. Three temperature measuring probes were installed on the sinter’s surface, inside, and inside the sinter itself. When the sinter was heated to 70 degC, the internal sinter temperature was higher than the PTFE surface temperature. At the same time, the sintering oven’s temperature was lower than the PTFE’s temperature.
The polymerization reaction is a semicontinuous process. After the reaction is complete, the sinter is cooled. The water content of the sinter reaches 400 kg.
Water is a key ingredient of the polymerization process. In addition to the reaction, deionized water is injected into the reactor. With a relatively high APS content, it is hard to control the temperature.
Several countries have advanced technology and science. They maintain the recipe and the details of their polymerization process confidential. Therefore, it is difficult to obtain complete kinetics data.