Non-stick fluoropolymer coating lubricates any surface
The modern non-stick surface was invented entirely by accident. In 1938, Roy Plunkett was busy working on a new chlorofluorocarbon refrigerant for DuPont when an experiment yielded some unexpected slippery results. Plunkett had just invented what we now call Teflon, the first fluoropolymer coating. A fluoropolymer coating is a general term for a class of coatings (including Teflon, Xylan, Excalibur, and Fluon), which are so named because they contain fluorocarbons. It is the strong bonds in the fluorocarbons which gives these coatings their non-stick qualities.
Nowadays fluoropolymer coating is an indispensable part of our lives. The polymer is slippery, non-stick, highly temperature resistant, chemical resistant and corrosion resistant. It is used for cookware, windshield wiper blades, coating hoses and tubes that transmit chemicals, and medical implants such as heart valves. In this article we will describe different fluoropolymer coatings and their uses, as well as where to find companies and products in Australia.
More than non-stick – special properties of fluoropolymer coating
Fluoropolymers are known for their non-stick properties, but they have many properties beyond slipperiness. It is the combination of these properties that make fluoropolymers such powerful coatings. These properties include:
- Non-wetting – Fluoropolymer coated surfaces are hydrophobic and oleophobic, and cannot be wetted. This also makes them easy to clean.
- Chemical resistant – Fluoropolymers have a high resistance to solvents, acids, and bases.
- Corrosion resistant – Because it is waterproof and chemical resistant, fluoropolymer coatings are a barrier between a substrate and corrosive elements, protecting it from damage.
- Electrical resistant -Fluoropolymers work as insulators, and have a high dielectric strength and high surface resistivity. This makes them especially useful in electrical applications such as light fittings and connectors.
- Anti galling and low friction – Due to the non-stick, low friction properties of fluoropolymer coating it prevents galling (a form of wear caused by adhesion between sliding surfaces) and provides excellent bearing properties. It can achieve very low coefficients of friction, so is ideal for shafts, bearing surfaces, moving mechanisms, stud bolts and fasteners.
- Temperature resistant – Fluoropolymers are highly temperature resistant, and can function at temperatures of +260°C. They also have cryogenic stability and can maintain their physical properties down to -270°C.
The 4 most common uses of fluoropolymer coating
The range of substrates that fluoropolymer coating can be applied to includes stainless steel, aluminium, carbon steel, carbon fibre, rubbers, plastics, glass, and more. The many varieties of fluoropolymer coating include PTFE coating (Teflon), PFA coating, ETFE coating, and FEP coating. About 85% of fluoropolymers are used for industrial applications such as computer networks and semi-conductor manufacturing equipment. The remaining 15% is used in consumer goods such as non-stick cookware, bakeware, small electrics and protective fabrics (like Gore-Tex). Below is a closer look at just a few of the possible applications.
Industry and manufacturing
Corrosion is a big issue facing the world of industry and manufacture. Fluoropolymer coatings are common corrosion protection coatings, particularly where thin-film coatings are required. As well as corrosion, substrates in the chemical, manufacturing, or oil and gas industries require protection from chemicals, water, acids, temperature, and weathering. Fluoropolymer coatings are used to provide a protective lining for hose assemblies and industrial pipelines as well as in reactor vessels and storage tanks. Their low friction surface is used in valves, pumps, hydraulics, and more; for example Xylan coating is suitable for these applications.
The range of substrates in the medical industry which can benefit from a coating that prevents biofilm and creates an oleophobic and hydrophobic surface which is easy to clean is endless. Surgical tools, life support equipment, needles, electrodes for diagnostics, medical clothing, gowns, sheets, bones prostheses, stents, tubes… the list goes on. Fluoropolymer coatings in the medical industry help provide surgical tools that create easier and cleaner surgeries, medical implants that are electrically insulated, clothing and equipment that diminishes the chances of infection.
Cookware and food processing
The most recognised use for fluoropolymer coatings is non-stick cookware. Pots, pans, and bakeware have all benefited from a Teflon coating. These non-stick benefits can be expanded into the food processing industry. Using a fluoropolymer on commercial equipment can allow the same equipment to make a wider range of food products (due to the hygienic, easy-to-clean nature of fluoropolymers) as well as cutting down on maintenance and issues with wastage and corrosion. With easier cleaning comes less downtime and fewer harsh chemicals, increasing productivity. Surfaces that may benefit from a fluoropolymer coating include vats, mixing hoppers, transfer buckets, moulds, rollers, blades, and process pipes.
In an electronic world, the need for insulation is high. Fluoropolymer coatings are insulating and have a high dielectric strength, but on top of that they are hydrophobic, heat resistant, and can form around objects like circuitry. These qualities mean they are used in almost all industrial sectors, from aviation and aerospace to telecommunications and automotive. Just a few of the applications of fluoropolymer coatings are insulating wiring and cables, protecting printed circuit boards, moisture-proofing LCD displays in televisions, computers, and other screens.
Find fluoropolymer coatings and specialists in Australia
There are companies across Australia that provide specialised fluoropolymer coating applications in all industries. These companies often rely on internationally recognised products from manufacturers such as AkzoNobel, PPG and Sherwin Williams. If you have a project that requires fluoropolymer coating, we can help you find the solution. Take advantage of our 100% free quote service by clicking the “Request a Quote” button below and let us, in cooperation with our coating partners, connect you with your coating needs.