Polytetrafluoroethylene is a linear crystalline thermoplastic with a white waxy feel similar to polyethylene. The surface feels smooth and its products are transparent or opaque.
It is a manufacturer specializing in the production of ptfe biaxially stretched film. Let us take a look at it together.
In the entire production process of stretched microporous membranes, stretching conditions are very important influencing factors. They will affect the thickness of the microporous membrane, average pore diameter, and maximum pore diameter and other indicators related to pore performance. .
Stretching ratio and stretching temperature have obvious effects on the tensile strength and elongation at break of the film. Compared with unstretched polytetrafluoroethylene tape, the strength of the film is doubled.
The tensile strength of PTFE biaxially stretched membrane increases with the increase of stretching temperature, while the elongation at break of microporous membrane decreases with increase of stretching temperature.
This 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.
The PTFE biaxially stretched membrane produced has a higher PF value and better filtration performance than other high-efficiency filtration materials PTFE microporous membrane.
The membrane pore size is small, and the material has undergone high-temperature heat setting treatment, and the microporous structure is stable, so it can effectively block dust particles at high wind speeds.
Surface filtration mechanism allows easy removal of accumulated dust through mechanical vibration or wiping.
</p
