Polytetrafluoroethylene film  is a microporous film produced using polytetrafluoroethylene dispersion resin through special processes such as pre mixing, extrusion, rolling, and biaxial stretching. It is divided into clothing film, pu micro waterproof film, filter film, and purification film.

Polytetrafluoroethylene film introduction

It is a microporous film made from polytetrafluoroethylene as raw material using special processes such as rolling, extrusion, and biaxial stretching. PTFE films can be divided into clothing membranes, air filtration films, and air purification films according to their usage. PTFE membrane has a fibrous microporous structure with a porosity of over 85%, with 1.4 billion micropores per square centimeter and a pore size range of 0.02 μ M-15 μ M.

Main structure

1. The surface morphology of PTFE microporous film is spider like microporous structure. Pores are formed between microfibers, and the arrangement direction of microfibers is basically parallel to the stretching direction; The junction of the fiber bundle is the node, which is formed by the entanglement and connection of many microfibers.

2. Polytetrafluoroethylene film belongs to asymmetric membrane, and there are differences in the size of micropores on the front and back sides of the membrane.

3. The cross-sectional micropore size of the film is larger than the surface micropore size, and there are also differences in the longitudinal and transverse micropore sizes, with longitudinal micropores being larger than transverse micropores.

4. The cross-section of a membrane is a network structure, with very complex changes in the three-dimensional structure of pores, such as network connectivity, hole embedding, and channel bending. There may be multiple micropores forming a channel, or one micropore may be connected to multiple channels.

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