The advantage of PTFE coatings (for example Teflon) will be the non-stick properties in the material, which means applications such as commercial bakeware have excellent non-stick / release properties and therefore are a breeze to completely clean.
We’ve created selection of PTFE coating systems with many different benefits to suit most applications. The function that the coating is to be utilized for along with the operating conditions will define your selection of the correct coating to do the job.
In this blog, we explore a number of the benefits in more detail.
NON-STICK AND RELEASE
A PTFE coating placed on an element will give excellent non-stick/release properties and it is very easy to scrub. Such a coating is also excellent at preventing both hot and cold products from permanently adhering to the substrate and therefore is trusted from the cookware, confectionery, food processing and bakery industries. PTFE coatings can also be useful for non-stick within the packaging, heat sealing, moulding, automotive, aerospace, chemical and pharmaceutical industries.
NON-WETTING
PTFE surfaces are hydrophobic and oleophobic, and won’t readily wet. This gives the material to self-clean. For your semiconductor industry, this property owner vital because it allows all chemical media to run off and become collected.
TEMPERATURE RESISTANCE
PTFE coatings can service arduous application conditions involving extremes of temperature. They can remain stable at advanced temperatures of +260°C and for short periods at +290°C. PTFE can be used on extrusion dies and sealing of plastic/elastomers where anything else may degrade or cause clogging of molten material. These coatings also can perform at cryogenic temperatures which enable it to remain stable at -270°C.
LOW FRICTION AND ABRASION RESISTANCE
PTFE coated surfaces reduce friction and can achieve suprisingly low coefficients of friction, typically from about 0.04 to 0.15. Where oils and grease evaporate at elevated temperatures PTFE remains and it is therefore suitable for shafts, bearing surfaces, moving mechanisms, stud bolts and fasteners. For additional abrasion resistance and increased wear life, this type of coating might be reinforced with the addition of fillers and also by combining with a metal sprayed base layer.
CORROSION AND CHEMICAL RESISTANCE
PTFE is inherently resistance against attack from most chemicals so when coupled with other fluoropolymers for example FEP and PFA greatly raises the duration of the component. PTFE applied as a surface coating will raise the corrosion resistance in the component and will even be enhanced by using primers, other pre-treatments like plating and phosphating. Stud bolts and fasteners, valves, pumps, pipe clamps and connectors all reap the benefits of these types of coatings.
ELECTRICAL PROPERTIES
PTFE includes a high dielectric strength, a minimal dissipation factor, insulating and also surface resistivity, giving protection and uses in several electrical applications. Our coatings may also be designed to become conductive and used as an antistatic coating. Light fittings, connectors, cable guides and portable electrical equipment all make use of PTFE.
ANTI-GALLING
PTFE coatings prevent galling and give excellent bearing properties. Mating surfaces and rotating parts make use of this coating and help provide minimal maintenance downtime.
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