The PTFE membrane


The PTFE membrane is a microlehole film produced by polytetrafluoroethylene decentralized resin, which produces special processes such as premissions, squeezing, pressure, and bidirectional stretching.

Introduction and micro -structure of PTFE membrane

The PTFE membrane is a micropolille film made of polytetrafluoroethylene as the raw material. It uses special processes, mortar pressure extension, extrusion, two -way stretching and other methods. PTFE membrane can be divided into clothing membrane, air filter membrane, and air purification membrane according to the use. The PTFE membrane has the original fiber-shaped microporous structure, with a pore rate of more than 85%, 1.4 billion micropores per square centimeter, and a pore diameter range of 0.02mm-15mm.

The main structure

1. The surface shape of the PTFE micropores is a spider -arial micropore structure. The pores are formed between microfiber, and the direction of the microfiber arrangement is basically parallel to the stretching direction; the connection of the fiber bundle is a node, which is formed by many microfiber entanglement.

2. The PTFE membrane is a non -symmetrical membrane, and the size of the front and back of the membrane is different.

3. The dimension of the section of the membrane is larger than the micropore size on the surface, and the size of the longitudinal micro -pores is also different.

4. The cross section of the membrane is a network structure. There are very complicated changes such as mesh connection, holes inlaid, and bending of pores on the three -dimensional structure of the holes. Multiple channels are connected.

Category and application editing

1. PTFE clothing membrane

The pore formation characteristics of polytetrafluoroethylene plastic resin are made of micropores made of two -way stretching method. The surface of the membrane can reach more than one billion micropores per square centimeter, and each micro-hole diameter (0.1 μm-0.5 μm) is hundreds of times smaller than the diameter of the water molecule (20 μm-100 μm), which μm) is tens of thousands of times, so that water vapor can pass, and water droplets cannot pass. Using this microporous structure can achieve excellent waterproof and humidity function. In addition Through, it has the characteristics of windproof and warmth. After reunion with other fabrics, it is widely used in special protective clothing such as military clothing, medical clothing, leisure clothing, fire protection, anti -virus, and water dipping operations, outdoor sports clothing, shoes, hats, gloves and other auxiliary materials, as well as sleeping bags, tents, rain sets and other materials.

2. PTFE air filter membrane

The unique node of the polytetrafluoroethylene micropodes, smooth surface, smooth surface, chemical resistance, breathable impermeability, large breathability, flame retardant, high temperature resistance, anti -acid alkali, non -toxic, etc. can be used for atmospheric dust removal , Air purification, etc. The filtering efficiency made by the membrane is high, which can reach 99.99%, nearly zero emissions; the operation resistance is low and the filtration speed is fast; the service life is long, which can be reused to reduce the operating cost. It is mainly used in chemical, steel, metallurgy, charcoal black, power generation, cement, waste incineration and other industrial melting furnaces. Polytetrafluoroethylene filter membrane, this membrane pore can be controlled between 0.2 and 15 μm, and the gap rate can reach more than 85%.

3. PTFE air purification membrane

The air purification film is based on polytetrafluoroethylene as the raw material. After puffing and stretching, a microphone film is formed. This thin film is covered with special processes on various fabrics and substrates, becoming a new type of filtering material. The membrane aperture (0.05 ~ 0.45 μm) is small, distributed uniform, and large pore rate. While maintaining air circulation, you can filter all dust particles including bacteria to achieve the purpose of purifying and ventilation. Microelectronics and laboratory consumables.