Ptfe gasoline: Teflon PTFE Chemical Compatibility Reference Chart

6 марта, 2023

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RS Components | Industrial, electronic products & solutions

RS Components | Industrial, electronic products & solutions














  • Support



  • Discover






  • for the Inspired





  • Find your local branch









Our product sections:


  • Batteries & Chargers



  • Connectors



  • Displays & Optoelectronics



  • ESD Control, Cleanroom & PCB Prototyping



  • Passive Components



  • Power Supplies & Transformers



  • Raspberry Pi, Arduino, ROCK & Development Tools



  • Semiconductors



  • Automation & Control Gear



  • Cables & Wires



  • Enclosures & Server Racks



  • Fuses & Circuit Breakers



  • HVAC, Fans & Thermal Management



  • Lighting



  • Relays & Signal Conditioning



  • Switches



  • Access, Storage & Material Handling



  • Adhesives, Sealants & Tapes



  • Bearings & Seals



  • Engineering Materials & Industrial Hardware



  • Fasteners & Fixings



  • Hand Tools



  • Mechanical Power Transmission



  • Plumbing & Pipeline



  • Pneumatics & Hydraulics



  • Power Tools, Soldering & Welding



  • Computing & Peripherals



  • Facilities Cleaning & Maintenance



  • Office Supplies



  • Personal Protective Equipment & Workwear



  • Security & Ironmongery



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  • Test & Measurement






Fluoroplast application

Fluoroplast This polymeric material is used everywhere in modern industry, it is also used in everyday life. Fluoroplast is a very promising and demanded material; scientists and engineers have been studying its wide possibilities since the middle of the last century, opening up new areas of application for this polymer. The percentage of production and use of fluoroplastic in industry is growing by 10% every year, nowadays it is available and everyone can purchase this material. nine0003

The use of fluoroplastic in various areas in the modern world occurs everywhere, from global large-scale projects where parts from this structural plastic are used, and up to sputtering on dishes — Teflon. Let us consider in more detail where fluoroplast is used.

Fluoroplastic in automotive and mechanical engineering

Fluoroplastic in automotive and mechanical engineering is actively used for the production of various spare parts for cars and mechanical engineering mechanisms, using for this purpose fluoroplastic blanks in the form of a sheet, plate, plate, rod, circle, pipe. Gaskets, seals, seals, cuffs, sliding supports are made from fluoroplastic in various ways. The softness and fluidity of fluoroplastic-4 and its modifications increase the service life of parts and components of mechanisms subjected to friction. nine0009
Fluoroplast 4 (f-4) is an excellent anti-friction material, it is not for nothing that it is called a “solid lubricant”; has a very low friction coefficient — 0.04; in the interaction between metal and fluoroplastic parts, the friction coefficient is comparable to friction in bearings in the presence of lubrication. To increase the wear resistance of parts, composites are made of fluoroplastic with the addition of graphite, bronze, and the polymer is reinforced with fiberglass. Fluoroplastic is suitable for work at high pressure, at low temperatures and in high vacuum. nine0003

Fluoroplastic for electronics and radio engineering

Fluoroplastic for electronics and radio engineering is used because the polymer has exceptional insulating properties. Fluoroplast-4 is an excellent dielectric (surface electrical resistance 1017 Ohm), in the electronics industry it is ideal for insulating wires, especially high-voltage ones, connectors, high-voltage cables and electrical machines. Its actual use is for the production of sealing parts of a reciprocating compressor (for example, piston rings), for the manufacture of dry bearings operating at low temperatures. nine0003

Fluoroplast f4 is indispensable for the chemical, nuclear and space industries

Fluoroplast-4 is an indispensable material for the chemical, nuclear and space industries due to its properties: it has high resistance to aggressive media, can be in contact for a long time with acids and alkalis, even concentrated , oils, sewage, salts, kerosene, oil and various fuels. Fluoroplast-4 is resistant to radiation, mold, fog and sun. Due to these characteristics, PTFE-4 plates (sheets) are widely used in the chemical industry for the manufacture and lining of pumps, storage and transportation tanks; to protect various surfaces from corrosion; for the storage of alcohol, mixtures based on it and especially pure substances that should not be contaminated. The experience of using this polymer shows that pipelines, reactors and apparatus protected by PTFE successfully operate for 25–30 years or more under severe conditions of chemical production and radiation. nine0003

Fluoroplastic for the food industry

Fluoroplastic for the food industry — this polymer has become indispensable in this area, it is non-toxic and harmless to humans. In the food industry and everyday life, fluoroplastic is used to make dishes with a non-stick coating, cream syringes, nozzles for rolling out dough, filters and seals for equipment, and razor blades. It is applied in a thin layer by spraying on the surface, providing heat resistance, non-wetting and prolonging the service life of products. nine0003

Use of fluoroplast in medicine

Fluoroplast-4 is hygienic, has no harmful effects on the human body and is widely used in medicine as containers for storing blood and medicines, as a material for the manufacture of artificial blood vessels and valves. PTFE-based composites are used to make biocompatible implants for plastic surgery of the ear, nasal septa, in dentistry and ophthalmology.

Advanced polymer milled lubricants PTFE

Powdered fluoroplast is used in lubricant formulations. Thanks to the development of nanotechnology in Russia, various additives, oils and lubricants have appeared with the addition of fluoroplastic, which sticks to the surface in powder form, fills all microcracks and defects, significantly increasing the protection against friction and wear of friction parts, including at high temperatures up to +260 ° FROM. But you need to understand that many unreliable sources indicate that fluoroplast f-4 of Russian or Chinese production can withstand short-term loads at +300°C and even +400°C. In fact, based on our practice, at such critical temperatures, this polymer begins to deform and break down. nine0003

The use of fluoroplast in construction

In the construction of modern bridges, overpasses, overpasses and galleries, sheet fluoroplast is used to make the most important details of sliding bearing structures; fluoroplastic parts (teflon gaskets) are widely used in the construction of buildings in areas with increased seismic activity, they allow free movement of the elements of the foundation and frame of buildings during earthquakes.

Fluoroplastic in the textile industry

The textile industry also uses PTFE for its needs. Modern high-tech fabrics for tailoring are covered with the thinnest film of fluoroplastic raw materials to give them water-repellent, vapor-permeable, windproof properties. Modified fluoroplast is used for impregnation of leather products in order to make them hydrophobic.

Interesting

For the first time, the Gore brothers combined the textile industry and fluoroplastic. In 1969, Wilbert and Robert Gore produced the first porous fluoroplastic thin film membrane fabric for the space program. We patented this wonderful fabric called Gore-Tex (Gore-Tex). Later, other similar materials appeared, which are currently actively used in the production of overalls and footwear. nine0003

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Fluoroplast properties and characteristics

Fluoroplast F4 is the most durable polymer in the world, which consists of a combination of carbon and fluorine atoms. That is why fluoroplastic surpasses even precious metals in many properties.

Fluoroplast has unique physical and chemical properties and characteristics:

✔ Will not oxidize or corrode.

✔ High density and durability.

✔ Fluoroplast-4 is recognized in the Guinness Book of Records as the most slippery material, which opens up the widest possibilities for the polymer in the engineering and transport industries.

✔ Fluoroplast-4 (aka Teflon, Polytetrafluoroethylene PTFE) is inert to chemically aggressive environments.

✔ Very low coefficient of friction.

✔ Temperature resistant — operating temperature from -269° to +260°.

✔ Excellent dielectric.

✔ Off.

✔ Does not absorb water.

✔ Service life over 20 years.

✔ Fluoroplastic F4 is the most demanded in relation to the F-2, F-3 grades.

Interesting

Teflon was discovered in 1938 by Roy Plunkett, a chemist working for the American corporation Kinetic Chemicals. The scientist accidentally discovered that gaseous tetrafluoroethylene, pumped into pressurized cylinders, polymerized into a powder with unique properties. A patent for this polymer was issued in 1941 years old. And 8 years later, Kinetic Chemicals became a division of the global chemical giant DuPont. In the USSR, polytetrafluoroethylene became known during World War II, when Soviet technicians dismantled a US-made tank and found a large white fluoroplast ring in its turret mechanism.

Due to its characteristics, physico-chemical, mechanical and electrical properties, fluoroplastic is used everywhere, parts and products made from this plastic are used in all areas, from the space industry, medicine, shipbuilding, to household products. nine0003

Production of fluoroplast-4 (F-4) is carried out from raw materials on the basis of GOST 10007-80 in three stages:

  • Chlorodifluoromethane production by the Swarts reaction;
  • tetrafluoroethylene is obtained from chlorodifluoromethane by pyrolysis;
  • as a result of the polymerization of tetrafluoroethylene, fluoroplastic powder is formed.

For the production of blanks in the form of sheet fluoroplastic (plates), rods (round timber), the method of cold pressing and further sintering at a temperature of 365°C is used. Pressing is carried out on hydraulically driven presses operating at a pressure of 350 kgf/cm2. Then various products are further manufactured from the blanks by mechanical processing. Fluoroplastic can be processed by almost any mechanical method — drilling, grinding, milling, turning. Parts can consist entirely of fluoroplast, or only the surface of the product is covered with it to improve anti-friction properties. nine0003

The production technology of fluoroplast-4 (polytetrafluoroethylene) is the most technically demanded and proven for modern industry.

Types of PTFE

Fluoroplastics are a group of fluorine-containing plastics. The analogues of the Russian fluoroplast — 4 are «Teflon» in the USA, «Fluon» in England, «Gostaflon» in Germany. The Russian industry produces several types of PTFE:

  • fluoroplast-4 (F-4) Polytetrafluoroethylene PTFE; nine0107
  • fluoroplast-3 (F-3) Polytrifluorochloroethylene;
  • fluoroplast-2 (F-2) Polyvinylidene fluoride;
  • copolymers.

Fluoroplast-4 has the highest density, thermal and chemical resistance, it is most often used in industry and in everyday life.

Production of fluoroplast (F-4) with various modifications

Plates (sheets) and rods are manufactured in accordance with:

  • Fluoroplast F4 — TU 6-05-810-88, TU 6-05-041-535-74;
  • Black fluoroplastic F4K20 (with the addition of coke 20%) — TU 6-05-1413-76;
  • Black fluoroplast F4K15M5 (with the addition of coke 15% and 5% molybdenum disulfide) — TU 6-05-1413-76;
  • Fluoroplast F4S15 (with the addition of glass fiber 15%) — TU 6-05-1412-76;
  • Fluoroplast F4S15M5 (with the addition of 15% glass fiber and 5% molybdenum disulfide) — TU 6-05-1412-76;
  • Fluoroplast F4M5 (with the addition of 5% molybdenum disulfide) — TU 301-05-109-91;
  • Fluoroplast F4UV15 (with the addition of 15% carbon fiber) — TU 301-05-16-89.

    • Finished products in the form of plates, plates, sheets, tapes, rods, pipes are produced on the basis of the above specifications (TU)

    .

    Each modified type has certain properties, however, from practice, the most popular grades are Ftoroplast F4 and Ftoroplast black F4K20 with increased density for friction mechanisms where friction is present. nine0003

    Disadvantages of PTFE