What are the main applications of PTFE

Update:04-08-2021
Summary:

1. Application of anti-corrosion performance of PTFE As […]

1. Application of anti-corrosion performance of PTFE
As rubber, glass, metal alloys and other materials have defects in corrosion resistance, it is difficult to meet the harsh environment of temperature, pressure and chemical media coexisting, and the losses caused by this are quite alarming. With its excellent corrosion resistance, PTFE material has become the main corrosion-resistant material in the petroleum, chemical, textile and other industries. Its specific applications include: conveying pipes, exhaust pipes, steam pipes for transporting corrosive gases, high-pressure oil pipes for steel rolling mills, high, medium and low pressure pipes for aircraft hydraulic systems and cold-pressing systems, distillation towers, heat exchangers, kettles, towers, and tanks Lining, valves and other chemical equipment.
The performance of the seal has a great influence on the efficiency and performance of the entire machine and equipment. PTFE material has the characteristics of corrosion resistance, aging resistance, low friction coefficient, non-stickiness, wide temperature resistance range, and good elasticity, making it very suitable for the manufacture of seals with high corrosion resistance requirements and service temperatures higher than 100°C. Such as machinery, heat exchangers, high pressure vessels, large diameter vessels, valves, pumps groove flange seals, glass reactors, flat flanges, large diameter flange seals, shafts, piston rods, valve rods, Worm gear pumps, tie rod seals, etc.
2. The application of polytetrafluoroethylene in medical and medicine
Expanded PTFE material is pure inert, has very strong biocompatibility, does not cause rejection of the body, has no physiological side effects to the human body, can be sterilized by any method, and has a microporous structure, so it can be used in a variety of rehabilitation solutions , Including artificial blood vessels and patches for soft tissue regeneration and surgical sutures for blood vessels, heart, general surgery and plastic surgery.


3. The application of polytetrafluoroethylene in electronic and electrical
The inherent low loss and small dielectric constant of PTFE materials make it possible to make enameled wires for use in micro motors, thermocouples, control devices, etc.; PTFE films are ideal for manufacturing capacitors, radio insulating gaskets, insulated cables, motors and transformers Insulating material is also one of the indispensable materials for aerospace and other industrial electronic components; using the selective permeability of fluoroplastic film that has high oxygen permeability and low water vapor permeability, oxygen sensors can be manufactured; Utilizing the characteristics of fluoroplastics that deviate from the polar charge under high temperature and high pressure, it can be used to manufacture microphones, speakers, parts on robots, etc.; using its low refractive index characteristics, it can be used to manufacture optical fibers.
4. Application of low friction performance of Teflon high temperature cloth in load
Because the friction part of some equipment is not suitable for lubrication, such as the occasions where the lubricating grease will be dissolved by the solvent and fail, or the products in the industrial fields such as papermaking, pharmaceuticals, food, textiles, etc. need to avoid lubricating oil contamination, this makes the filled PTFE material become The most ideal material for mechanical equipment parts without oil lubrication (to bear the load directly). This is because the friction coefficient of this material is the lowest among known solid materials. Its specific uses include bearings for chemical equipment, papermaking machinery, agricultural machinery, as piston rings, machine tool guides, guide rings; widely used in civil engineering projects as bridges, tunnels, steel structure roof trusses, large chemical pipelines, storage tanks Support sliding block, and used as bridge support and bridge swivel, etc.