1. Polytetrafluoroethylene has "cold flowability". That […]
1. Polytetrafluoroethylene has "cold flowability". That is, the plastic deformation (creep) of the material product under the action of long-term continuous load, which imposes certain restrictions on its application. For example, when PTFE is used as a gasket, the bolt is tightened tightly so that the gasket is "cold" (creep) and crushed when a certain compressive stress is exceeded. These shortcomings can be overcome by adding appropriate fillers and improving the structure of the part.
2. PTFE has outstanding non-stick properties, which limits its industrial application. It is an excellent release material that makes it extremely difficult to bond to the surface of other objects.
3, PTFE linear expansion coefficient is 10 to 20 times that of steel, larger than most plastics, its linear expansion coefficient changes with temperature changes very irregular. When applying PTFE, if the performance of this aspect is not enough, it is easy to cause losses.