I firmly believe that everyone is right PTFE board I understand all of them very well, but they are relatively new to some new users. In order to better let customers know more about them, let's continue Teflon plate manufacturer Describe the application teflon Matters that must be paid attention to in case of plate.

1. The low heat transfer coefficient and weak heat transfer performance not only prevent it from being used as the raw material of rolling bearings, but also promote the production of thick wall tube products without heat treatment.

2、 PTFE board Its thermal expansion coefficient is 10-20 times of that of steel, which is larger than that of most plastics. Its thermal expansion coefficient changes irregularly with the temperature change. When using PTFE, it is very easy to cause damage if insufficient attention is paid to these characteristics.

3. The polytetrafluoroethylene cushion block has outstanding non viscosity, which limits its application in industrial production.

4、 PTFE board With "cold flow". That is, the plastic deformation (stress relaxation) of the raw material product under the effect of long-term continuous load, which has a certain limit on its application. If PTFE is used as the sealing gasket, the foundation bolt is tightened too tightly for tight sealing, so that the special reduced ground stress is exceeded seal ring Resulting in "cold flow" (stress relaxation) and being squeezed flat. This defect can be eliminated by adding appropriate fillers and improving part structure.

5. When heated above 400, the cracking rate of ptfe plate slowly accelerates, and the dissolved substances are mainly tetrafluoroethylene, perfluoropepe and octafluorocyclobutane. Above 475, a small amount of dissolved substances are toxic. Therefore, it should be noted that the heating temperature of the PTFE gasket should not exceed 400, and the laboratory should have an excellent exhaust system, which is conducive to removing toxic and side effect vapors.

6. The viscosity of the solution is very high, and it is not fluid at high temperature. It is above the melting point (327), and the viscosity of the solution is 1010Pa. s. Even if it is heated to the melting temperature, it will not flow. This makes it impossible to use the forming method of general thermosetting plastics, but to use the calcination method similar to that of powder metallurgy.