PTFE Film

PTFE film is a microporous film made of polytetrafluoroethylene dispersed resin through special processes such as premixing, extrusion, calendering, and biaxial stretching. It is divided into clothing membrane, Puwei waterproof membrane, filter membrane, and purification membrane.

Introduction and microstructure of PTFE membrane

PTFE film is a microporous film made of polytetrafluoroethylene as raw material, using special processes such as calendering, extrusion, and biaxial stretching. PTFE membrane can be divided into clothing membrane, air filtration membrane, and air purification membrane according to its use. PTFE membrane has a fibrillar microporous structure with a porosity of more than 85%, 1.4 billion micropores per square centimeter, and a pore size range of 0.02μm-15μm.

Main structure

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

2. PTFE membrane is an asymmetric membrane, and the micropore size on the front and back of the membrane is different.

3. The micropore size of the cross section of the membrane is larger than the micropore size on its surface, and the micropore size in the longitudinal and transverse directions is also different, with the longitudinal micropore being larger than the transverse one.

4. The cross section of the membrane is a network structure, and there are very complex changes in the three-dimensional structure of the pores, such as mesh connection, pore sleeve, and channel bending. There may be multiple micropores forming a channel, or one micropore may be connected to multiple channels.

We provide various types of PTFE membranes:
1.PTFE clothing membrane

Using the pore-forming properties of polytetrafluoroethylene plastic resin, a microporous film is made by biaxial stretching. The membrane surface can reach more than one billion micropores per square centimeter. The diameter of each micropore (0.1μm-0.5μm) is hundreds of times smaller than the diameter of a water molecule (20μm-100μm) and tens of thousands of times larger than a water vapor molecule (0.0003μm-0.0004μm), allowing water vapor to pass through, but water droplets cannot pass through. This microporous structure can achieve excellent waterproof and breathable functions; in addition, because the pores are extremely small and arranged in irregular longitudinal curvatures, wind cannot pass through, thus having the characteristics of windproof and warmth retention.

2.PTFE air filter membrane

Using the unique node fibrillation, smooth surface, chemical resistance, air permeability and water-tightness, large air permeability, flame retardancy, high temperature resistance, strong acid and alkali resistance, and non-toxicity of polytetrafluoroethylene microporous membrane, it can be used for atmospheric dust removal, air purification, etc. It is mainly used for flue gas filtration in various industrial furnaces such as chemical industry, steel, metallurgy, carbon black, power generation, cement, and waste incineration. Polytetrafluoroethylene filter membrane, the pore size of the membrane can be controlled between 0.2 and 15μm, and the porosity can reach more than 85%.

3. PTFE air purification membrane

The air purification membrane is made of polytetrafluoroethylene. After expansion and stretching, it forms a microporous film. This film is laminated on various fabrics and substrates with a special process to become a new type of filter material. The membrane has a small pore size (0.05-0.45μm), uniform distribution, and large porosity. While maintaining air circulation, it can filter all dust particles including bacteria to achieve the purpose of purification and ventilation. It is widely used in pharmaceuticals, biochemistry, microelectronics, and laboratory consumables.

Hot Tags: ptfe film, China, suppliers, wholesale, buy, price