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This post was last edited by yuchenchf on 2017-8-5 16:00. Uses of PTFE: The unique properties of PTFE enable its wide use in industries such as chemicals, petroleum, textiles, food, papermaking, medicine, electronics, and machinery, as well as in marine operations. 1. Applications of corrosion resistance: Due to the limitations in corrosion resistance of materials such as rubber, glass, and metal alloys, it is difficult for them to function in environments with harsh conditions involving high temperatures, pressures, and chemical agents; the losses resulting from this are quite significant. PTFE material, thanks to its excellent corrosion resistance, has become a key corrosion-resistant material in industries such as petroleum, chemicals, and textiles. Its specific applications include: pipelines for transporting corrosive gases, exhaust pipes, and steam pipes; high-pressure oil pipes in rolling mills; high, medium, and low-pressure pipes in aircraft hydraulic and cold-pressing systems; linings for distillation towers and heat exchangers; as well as chemical processing equipment such as tanks, columns, and valves. The quality of seals has a significant impact on the efficiency and performance of the entire machinery. The PTFE material’s properties of corrosion resistance, aging resistance, low friction coefficient and non-stick nature, along with its wide temperature range and good elasticity, make it highly suitable for manufacturing seals that require high corrosion resistance and can operate at temperatures above 100°C. Seals for groove flanges of machines, heat exchangers, high-pressure vessels, large-diameter vessels, valves, and pumps; seals for glass reaction kettles, flat flanges, and large-diameter flanges; seals for shafts, piston rods, valve rods, worm gear pumps, tie rods, and so on. 2. Applications of low-friction properties in terms of load handling: In some devices, the friction-prone parts cannot be lubricated with oil, such as in situations where lubricants would be dissolved by solvents and thus become ineffective, or in industries like papermaking, pharmaceuticals, food processing, and textiles where it is necessary to prevent lubricants from contaminating the products. This makes PTFE-filled materials the ideal choice for oil-free lubrication (direct load bearing) of mechanical components. This is because the friction coefficient of this material is the lowest among known solid materials. Its specific applications include bearings used in chemical equipment, papermaking machinery, and agricultural machinery, as well as piston rings, machine tool guides, and guide rings ； In civil engineering and construction, it is widely used as support sliders for bridges, tunnels, steel structure roof trusses, large-scale chemical pipelines, and storage tanks, as well as for bridge bearings and bridge turning devices. 3. Applications in the electronics and electrical field: The inherent low loss and low dielectric constant of PTFE materials enable it to be used in enameled wires for micro motors, thermocouples, control devices, etc ； PTFE film is an ideal insulating material for manufacturing capacitors, radio insulation gaskets, insulated cables, motors, and transformers; it is also one of the essential materials for electronic components in industries such as aerospace ； Oxygen sensors can be manufactured by taking advantage of the selective permeability of fluoroplastic films, which allow high permeability to oxygen while having low permeability to water vapor ； Taking advantage of the property of fluoroplastics, which exhibits polar charge displacement under high temperature and pressure, it is possible to manufacture microphones, speakers, components for robots, and more ； Utilizing its low refractive index property, optical fibers can be manufactured. 4. Applications in medicine and healthcare: PTFE foam is purely inert, possesses excellent biocompatibility, does not cause rejection by the body, has no physiological side effects on humans, can be disinfected using any method, and features a porous structure; as a result, it can be used in various rehabilitation solutions, including artificial blood vessels and grafts for soft tissue regeneration, as well as for surgical suturing in vascular, cardiac, general surgery, and plastic surgery applications. 5. Applications of non-stick properties: PTFE material has the lowest surface tension among solid materials, meaning it does not stick to any substances. It also possesses excellent resistance to high and low temperatures, which makes it widely used in applications requiring non-stick properties, such as in the manufacture of non-stick pans. Its anti-adhesion processes mainly include two types: installing PTFE components or sheets on the substrate, and applying a PTFE coating or coated glass cloth through thermal shrinkage to cover the substrate. With the continuous advancement of material application technologies, the three major drawbacks of PTFE materials—cold flow, difficulty in welding, and difficulty in melt processing—are being gradually overcome, thereby expanding its application prospects in various fields such as optics, electronics, medicine, and oil and chemical industry for oil transportation and leakage prevention.