PTFE film is an environmentally friendly material. It is made of polytetrafluoroethylene (ptfe) material through special processes such as mixing, extrusion, extrusion, calendering, and biaxial stretching.
Main structure: 1. The surface morphology of the film is a spider web-like microporous structure.
Pores are formed between the microfibers, and the arrangement direction of the microfibers is basically parallel to the stretching direction; the junction of the fiber bundles is the node, which is formed by the entanglement of many microfibers.
2. The film is an asymmetric film, and the micropore sizes are different on the front and back sides of the film.
3. The cross-sectional micropore size of the polytetrafluoroethylene film is larger than the micropore size on the surface, and the vertical and horizontal micropore sizes are also different, with the longitudinal micropores being larger than the transverse ones.
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