The Impreglon Group is a licenced Teflon® applicator and is the first choice should such coatings be specified or required. All our coatings are applied by us at our dedicated plant near Nottingham.
What is Teflon® coating?
Teflon® coatings were Invented at DuPont's Jackson Laboratory in 1938 and over the last several decades have become highly popular. Teflon® coatings are the original fluoropolymer coatings. The versatility of these coatings allow application onto a wide variety of substrates, part sizes and configurations.
Teflon® industrial coatings spray on like paint and bake to a tough, inert finish. By combining heat resistance with almost total chemical inertness, excellent dielectric stability and a low coefficient of friction, Teflon® industrial coatings offer a balance of properties.
Uses of Teflon coating
Chemours (formerly known as DuPont) Teflon® industrial coatings can be used on carbon steel, aluminium, stainless steel, steel alloys, brass and magnesium as well as non-metallics such as glass and carbon fibre, some rubber and plastics. Optimum adhesion is usually obtained by roughening the surface before applying the coating.
While most people think of skillets and pots when they think of Teflon® coating, Thanks to a variety of coating types, the unique properties of Chemours Teflon® industrial coatings can become an integral surface component on any kind of part, from clutches that engage easier and valves that resist wear, to coil springs that become silent. In testing, it has been shown a PTFE coating performs far better than other coatings, such as nylon and acetal in these applications. With proper equipment, Teflon® industrial coatings can even be applied to specific areas of complex geometric parts, such as the internal threads of a nut.
In fact, almost half of all PTFE production is used for wiring in aircraft and computers as the dieletric properties and high melting point make it ideal for connector assemblies and insulation cables. Indeed the same properties also make it ideal to be used on printed circuit boards which are used at microwave frequencies. In the aerospace industry, Teflon® coatings enhance performance, reduce friction and improve the longevity of components from clutches to critical engine parts.
Teflon® coatings are also frequently used to coat the inside of fuel and hydraulic lines. The low-friction coefficient makes it helpful in ensuring fluids flow through these lines in colder temperatures and higher altitudes, where these fluids may flow more slowly, helping to maintain a reliable supply.
Teflon® coating is also useful in food and beverage industries where a non-stick coating is required. It's high heat-resistance can also be beneficial in cookware, as the coating will not degrade when placed in ovens or on cooking surfaces and also makes the equipment easier to clean. This is especially crucial for bakeries, confectioneries and restaurants across the UK.
Another common usage is in the medical and laboratory research industries as PTFE can be treated to become highly resistant to chemical corrosion and contamination by microbes. This can ensure biomedical and research projects are accurate, untainted and safe.
Properties of Teflon® Coating
Very few solid substances will permanently adhere to a Teflon® finish. Although tacky materials may show some adhesion, almost all substances release easily.
Low Coefficient of Friction
The CoF of Teflon® coatings is generally in the range of 0.05 to 0.20, depending on the load, sliding speed, and the particular Teflon® coating used.
Since surfaces coated with Teflon® are both oleophobic and hydrophobic, they are not readily wetted. Cleanup is easier and more thorough and, in many cases, surfaces are self-cleaning.
Teflon® industrial coatings can operate continuously at temperatures up to 260°C.
Unique Electrical Properties
Over a wide range of frequencies, Teflon® coatings have high dielectric strength, low dissipation factor, and very high surface resistivity. By special techniques, these non-conductive coatings can be made electroconductive enough to be used as a static dissipative or conductive coating.
Many Teflon® industrial coatings withstand severe temperature extremes without loss of physical properties. Teflon® industrial coatings may be used at temperatures as low as -270°C.
Teflon® coatings are normally unaffected by chemical environments. The only chemicals known to affect all Teflon® industrial coatings are molten alkali metals and highly reactive fluorinating agents.
Advantages of Teflon® coating:
- Unaffected by almost all chemicals
- Continuous use at high temperatures
- Slippery non-stick surface
- Outstanding dielectric properties
- Improved resistance to cold flow or creep
- Reduction in wear and friction
- Improved dimensional stability
- Increased stiffness and surface hardness
- Improve your product as it will release more easily.
- Save money as you won't need to replace your parts or equipment as often.
- Have less waste as your equipment will be much easier to clean.
Types of Teflon® coating
1. Teflon® PTFE
PTFE (polytetrafluoroethylene) nonstick coatings are usually two-coat (primer/topcoat) systems. These products have the highest operating temperature of any fluoropolymer (260°C), an extremely low coefficient of friction, good abrasion resistance, and good chemical resistance. PTFE is available only in water-based liquid form.
2. Teflon® FEP
FEP (fluorinated ethylene propylene copolymer) non-stick coatings melt and flow during baking to provide nonporous films. These Teflon® coatings provide excellent chemical resistance. In addition to low friction, FEP coatings have excellent nonstick properties. Maximum use temperature is typically 200°C. FEP is available in water-based liquid and powder forms.
3. Teflon® PFA
Like FEP, PFA (perfluoroalkoxy) nonstick coatings melt and flow during baking to provide nonporous films. PFA offers the additional benefits of higher continuous use temperature (260°C), higher film thicknesses and greater toughness than PTFE or FEP. This combination of properties makes PFA an excellent choice for a wide variety of uses, especially those involving chemical resistance. PFA is available in both water-based liquid and powder forms.
4. Tefzel® ETFE
ETFE is a copolymer of ethylene and tetrafluoroethylene and is also sold under the Tefzel® trademark. Although not fully fluorinated, ETFE has excellent chemical resistance and can operate continuously at 150°C. This resin is the toughest of the fluoropolymers and can be applied at film builds up to 1000 microns to provide a highly durable finish. ETFE is available in powder form.
5. Teflon® One Coat
These solvent-based liquid coatings are formulated with special blends of fluoropolymers and other high-performance resins to improve toughness and abrasion resistance. Because the film components stratify during baking, most of the fluoropolymer properties (such as low friction and nonstick character) are retained. The resins provide adhesion and abrasion resistance. These products can sometimes be applied to smooth, clean metal. Bake requirements vary, depending on the specific coating.
6. Teflon® Dry Lubricant
Dry lubricant coatings are special versions of Teflon® technology designed to provide lubrication under high-pressure/velocity (PV) conditions. These products are solvent-based, one-coat systems.
Is Teflon® coating safe to use?
One of the most common uses of Teflon® coating is in non-stick pans, pots and cookware which makes it convenient to use and easy to clean. However there has been controversy over its use with some sources suggesting that Teflon® coating is harmful and linked to health conditions such as kidney disease, liver disease and certain types of cancers, whilst others say it is completely safe.
The main concerns centred on a chemical used called perfluorooctanoic acid (PFOA) which used to be used to produce non-stick cookware. Most of the PFOA was normally burnt off during the manufacturing process, however sometimes a small amount remained in the final product.
However, in 2006, the PFOA Stewardship Program was launched by the US Environmental Protection Agency (EPA) which spurred the elimination of PFOA from Teflon® products. The aim was to eliminate PFOA use by 2015 which was accomplished in 2013 so since then Teflon products have been PFOA-free.
One other concern has been when Teflon® coatings are exposed to high heat (above 300 degrees Celsius) the compound can start to break down, releasing toxic chemicals into the air which when inhaled can cause polymer fume fever - a temporary condition that has flu-like symptoms. However, in all cases this was due to being exposed to fumes from overcooked Teflon® cookware at extreme temperatures of close to 400 degrees Celsius and they were also exposed for longer than four hours.
In summary, Teflon® coating makes cookware more convenient, it is safer since the removal of PFOA from Teflon® products and provided common sense cooking practice are followed exposure to fumes can be avoided.
Tailoring Teflon® coating to UK Businesses
At Impreglon, we understand that each industry and business in the UK has its unique requirements. Our licensed Teflon® applicators work closely with our clients to customize coatings that cater to their specific needs. Whether it's enhancing the performance of automotive components or ensuring the reliability of critical electrical connections, we have the expertise to deliver tailored solutions.
For more information please complete our online form and we will get back to you as soon as possible.