Teflon coating – the non-stick for a wide range of substrates
Teflon™ is a registered trademark of Chemours ( DuPont) for a range of fluoropolymer coatings for consumers and industrial applications. In Singapore the teflon coating products are mostly known for their low coefficient of friction which creates a non stick surface for example on cookware and vehicles. However, these coatings come with many more benefits allowing for a wider range of applications.
In this article we will take a look at Teflon coating and its benefits, the different types of Teflon coatings and their applications as well as Teflon manufacturers and suppliers in Singapore.
The essentials that you should know about Teflon coating
A common misconception is that Teflon coating is one type of product; the truth is Teflon is a trademark that covers several fluoropolymer coatings. The trade name Teflon was used for the first time in 1938 when a material called polytetrafluoroethylene (PTFE) was discovered – Teflon was thus, the first PTFE coating and back then the two terms for each other’s synonymes. However, nowadays, Teflon refers to a group of fluoropolymer coatings by Chemours which can be used to create a non stick surface for example on cookware. These coatings also have more beneficial properties; teflon coatings are:
- Hydrophobic – Teflon coated surfaces repel water and oils, and cannot be wetted making them easy to clean.
- Chemical resistant – Teflon coating is highly resistant to solvents, acids, and bases.
- Corrosion resistant – Because it is waterproof and chemical resistant, Teflon coating forms a protective barrier between a substrate and corrosive elements.
- Temperature resistant – It remains functional up to +260°C. It also has cryogenic stability and can maintain its physical properties down to -270°C.
- Electrical resistant -Teflon works as insulator, and has a high dielectric strength and surface resistivity. This makes it especially useful in electrical applications.
The most important types of Teflon coating and their uses
Teflon coatings come in many types, the six most common ones are PTFE, FEP, PFA, ETFE, One Coat Teflon and Dry Lubricant. Below we will take a closer look at the six types and provide examples of their industrial uses. When it comes to domestic applications of teflon coating, protecting cars and improving the looks of bikes are on top of the list; there are special Teflon spray products for the purpose.
1. Teflon PTFE – the first ever PTFE coating
The Teflon PTFE coating was the first one to carry the trade name. These polytetrafluoroethylene coatings are non stick two coat (primer and topcoat) systems. They have the highest continuous operating temperature (up to 260°C) and extremely low coefficient of friction. They are also resistant to abrasion and a wide range of chemicals.
Available as: water based liquid coating
Uses: fuel filters, cookware, heat exchangers, carburetor shafts, ball valves, bearings, filters, cryogenic, aerospace
2. Teflon FEP – chemical resistant non porous films
The FEP (fluorinated ethylene propylene copolymer) coatings melt and flow during the curing process resulting in non proprus films. This type of Teflon coating is known for its resistance to an extensive range of chemicals. Additionally, the FEP coatings cure to an excellent non-stick surface with maximum operating temperature of 240°C.
Available as: water based liquid and powder coating
Uses: plastic moulds, food processing, rocket engines, textile dry cans, heat seal bars, chemical sector
3. Teflon PFA – the toughest Teflon coating
When the non-porous chemical resistant film of an FEP coating is required together with more resistance, a PFA (perfluoroalkoxy) coating is worth considering. These coatings have higher temperature resistance, (up to 260°C) and greater film thickness (up to 1,000 μm) as well as being tougher than FEP or PTFE.
Available as: water based liquid and powder coating
Uses: chemical impellers, mixing tanks, valves, pumps, laundry dryers, high temperature moulds
4. Teflon ETFE – Tefzel™ powders
ETFE (a copolymer of ethylene and tetrafluoroethylene) is the Teflon powder coating also sold under the trademark Tefzel. These coatings provide an extremely durable finish for they are the toughest of fluoroplastics and applicable at film thickness of up to 1,000 μm. Additionally, the ETFE coatings are chemical resistant and temperature resistant up to 149°C (operating temperature).
Available as: Teflon powder coating
Uses: tank linings, pumps, impellers, flanges, conveyor chutes, exhaust ducts, electrical insulators
5. Teflon Dry Lubricant – for PV conditions
Teflon Dry Lubricant coatings are designed for PV conditions (high pressure and velocity) to provide lubrication. These coatings are often one coat systems which cure between 260 and 370°C.
Available as: Solvent based liquid coating
Uses: copiers, printers, commercial food
6. Teflon One Coat – efficient application
These special blends of resins and fluoroplastics have been developed to increase abrasion resistance and general toughness. This type of Teflon coating has the traditional non-stick and low friction properties with an increased adhesion and abrasion resistance. They are often also easy to apply; suitable for smooth bare metal without thorough surface preparation like teflon processes usually have. Note that solvent based coatings have a higher VOC rate; yet it meets the regulations set by the National Environment Agency of Singapore.
Available as: Solvent based liquid coating
Uses: engineer parts, fan blades, garden tools, waffle irons, conveyors, automotive fasteners, fuel injectors, saw blades
Get the right Teflon coating for your project
Even though you now know the basics of the six common types of Teflon coating, there is much more information about Teflon coating that benefits you when choosing a solution for your project. In case you are looking for a Teflon coating or wish to gain more information about fluoropolymer coatings, contact us! Our experts are here to help. Together with our specialised coating partners we will connect you with the coating system that best suits you needs. Get in touch by clicking the request-a-quote button on the bottom of this page or simply send us an email.
Teflon coating singapore – manufacturers and suppliers
Despite the small size of Singapore, there are many companies that supply and apply Teflon paint products. Below you can find a selection of them – there are many more in the country.
When it comes to Teflon coating manufacturers, there are none located Singapore. Note that the only Teflon paint manufacturer is Chemours (DuPont). However, there are other fluoropolymer paint and specifically PTFE coating manufacturers in the country, for example 3M Singapore produces PFA, FEP and PTFE coatings under their Dyneon™ tradename.
|Coolmar-Ta Coatings & Systems Pte Ltd||13 Tuas Link 1, Singapore 638589|
|ACP Metal Finishing Pte Ltd||6 Joo Koon Circle, Singapore 629037|
|Hosanna Qmi||2 Jurong East Street 21, #03-C31/32/33 IMM, Singapore 609601|
Do not hesitate to contact us when in need of more information on Teflon coating products, applications or specialist companies. We, together with our partners provide you with necessary advisory and competitive quotes.
The 3 standard steps of the Teflon coating process
As Teflon coating exists as different types of non stick coatings, the application processes slightly differ from each other. However, every Teflon coating process consists of three standards steps.
Step 1 – Surface preparation
Surface preparation forms the foundation for a successful coating project: also when applying Teflon products. In the case of fluoropolymers like Teflon, the substrate is prepared for receiving the coating by grit blasting. It gives the surface a texture to which the coating can adhere. It also removes all contaminants, such as, rust, oil, grease and other surface coatings.
Step 2 – Applying Teflon paint
Once the substrate is ready for the coating, the coating must be made ready for the substrate: if you are about to start a liquid Teflon coating process, you should first shake or stir the coating according to the manufacturer’s instructions. Be aware that not all Teflon products are suitable for stirring with high speed mixing equipment. Most Teflon products are ‘ready-to-spray’, however, sometimes thinning is needed prior to application.
As there are different types of Teflon coatings for different application, there are also numerous application methods. The most common of these include:
- Manual spray – Manual spray uses compressed air and standard spray equipment. The spray gun should be used with a flat and rectangular motion, spraying the Teflon onto the surface. The spray gun needs to be held at a distance of 10-30 cm from the object. If the distance is not kept, the coating may get a rippled look.
- Automatic spray – Suitable when a large volume of products need to be coated. This method requires a coating line, and a conveyor when the parts have a flat surface.
- Electrostatic spray – An essential part of Teflon powder coating process. Electrostatic spray results in an equal coat and the use of Teflon powder coating reduces waste as excess powder can be collected and reused.
In addition to the above mentioned application methods, the teflon coating process can also include dip and flow, rolling and brushing. Note that application by brush is possible only for minor local repairs. Teflon can also be applied as a wax like solution on vehicles.
Step 3 – Curing the coating
Teflon coating requires heat to harden and form a film, this phenomenon is known as curing. The curing takes place in a special oven; the most important factor is the stability of the temperature for a certain period of time. It is also crucial to use a specific temperature for each coating; too low or high temperature will compromise the appearance and properties of the coating.
For the complete Teflon coating process, do read the product description and specific instructions to guarantee the best possible end result.