What is the processing method of ptfe film?
In the forming process of ptfe film, the double stretching or stretching processing method is mostly used abroad.
PTFE can be stretched at room temperature to 327°C, that is, the stretching below the melting point is performed in a high elastic state.
Stretching at low temperatures will cause the film to break, making stretching impossible.
When the temperature is higher than 327°C, the crystalline state between polytetrafluoroethylene molecules changes to amorphous, and the network structure cannot be obtained well, so the general stretching temperature is between 40°C and 327°C.
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