Granular PTFE Is Used for Gaskets to Seal Teflon

Polytetrafluoroethylene (PTFE), commonly known as the "plastic king", is a high molecular weight polymer synthesized by polymerization of tetrafluoroethylene as a monomer. Its chemical formula is (C2F4) n. It has excellent heat and cold resistance and can be used for a long time at -180-260 º C. This material has the characteristics of acid resistance, alkali resistance, and resistance to various organic solvents, and is almost insoluble in all solvents. Meanwhile, polytetrafluoroethylene has the characteristic of high temperature resistance and extremely low friction coefficient, making it an ideal coating for easy cleaning of the inner layer of water pipes in addition to serving as a lubricant.

1. In terms of corrosion resistance: PTFE material has been widely used in many industries such as petroleum and textile due to its outstanding corrosion resistance performance. Representative ones include exhaust pipes, steam pipes, high, medium, and low pressure pipelines, valves, etc. Especially in harsh environmental conditions such as low temperatures and anti sticking that conventional materials cannot use, the advantages of PTFE are more evident.

2. In terms of electronics and electrical engineering, the dielectric constant of polytetrafluoroethylene is relatively small, so it can be used to prepare enameled wires for use in micro motors. In addition, fluoroplastic films have certain selective permeability to various gases, so this characteristic can be used to prepare oxygen sensors. Nowadays, various forms of PTFE materials have played an important role in the field of electronic and electrical insulation. PTFE glass paint cloth and glass cloth are used to make high-temperature and high-frequency insulation materials, which can be used in satellite communication and computers, etc; PTFE film is used to make capacitors, as insulation layers, pads, cables, etc. between instruments; PTFE thin-walled pipes with different diameters are used for lead out conduit, heat shrink pipes and spiral pipes, as well as insulated water pipes for generators.

3. In the field of medical treatment, polytetrafluoroethylene has excellent biocompatibility, and in recent years, many people have conducted in-depth research on it as a biomaterial. In recent years, PTFE membranes have been developed and used as artificial organs, such as blood vessels and heart valves, both domestically and internationally. For example, in clinical practice, it has been used as a scaffold material for artificial blood vessels and nasal plastic surgery, and has achieved good results.

4. In terms of architecture: By coating PTFE resin on ultra-fine glass fiber fabric, the PTFE film material is lightweight, high-strength, fire-resistant, and has good self-cleaning properties. It is not affected by ultraviolet rays, anti fatigue, anti distortion, anti-aging, and has a long service life. It has the characteristics of high light transmittance and low heat absorption. It is precisely because of the invention of this cross era membrane material that membrane structures have become modern permanent buildings.

5. Low friction performance in terms of load: Due to its relatively low friction coefficient compared to most solid materials, PTFE filling has gradually evolved into an excellent material for oil-free lubrication of various parts. It has a wide range of applications, including bearings for chemical equipment, piston rings, supporting sliders for steel roof trusses, and bridge turntables.