What influence do stretch ratio and stretching temperature have on ptfe biaxially stretched film?

Stretching ratio and stretching temperature have a significant impact on the tensile strength and elongation at break of ptfe biaxially stretched film. Compared with unstretched polytetrafluoroethylene tape, the strength of the film is doubled.

The tensile strength of polytetrafluoroethylene microporous membrane increases as the stretching temperature increases, while the elongation at break of the microporous membrane decreases as the stretching temperature increases.

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