Why does the higher the stretching temperature, the higher the elongation at break of ptfe biaxially oriented film?
PTFE biaxially stretched film is because as the stretching temperature increases, the molecular chain mobility becomes higher, the wafer becomes easier to unwind, and the orientation of the microfibers in the film becomes higher.
When the stretching ratio is small, the length of the microfibers is smaller and the orientation is lower. When the stretching ratio is larger, micropores with a more uniform size distribution can be obtained.
Although the degree of microfiber orientation increases, the larger microfiber size causes the microfibers to de-orient during the subsequent heat setting process, thus reducing the strength.
Suzhou New Material Technology Co., Ltd. is a fluorine material film manufacturer integrating production, sales and customization.
The company has advanced PTFE membrane production lines and composite production lines.
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