PL
ENPowder coatings are a modern coating technology that has transformed the surface finishing industry. Instead of liquid solvents, the process uses a dry powder that forms a durable, resistant coating once applied and cured. These coatings are characterised by high resistance to mechanical damage, UV radiation and corrosion. They are also far more environmentally friendly - they emit no volatile organic compounds. Find out exactly how powder coatings are made.
Every component of a powder coating plays a specific role - from the resins to specialist additives.
What is powder coating made of?
The composition of a powder coating determines its properties, durability and intended use. Although formulations vary depending on the type of coating, every powder coating is built from several key components which together create a uniform, resistant structure once cured.
Resins
The main component of powder coatings - they form the binder and define the character of the coating. Depending on the application, polyester resins (for exterior use), epoxy resins (for interior use) or epoxy-polyester resins (the so-called hybrids, combining the properties of both) are used.
Curing agents
Responsible for the chemical reaction by which the coating becomes hard and scratch-resistant. Together with the resin they form a polymer network that gives the coating its durability and mechanical resistance.
Pigments
They give the coating its colour and influence opacity and UV resistance. Depending on the requirements, organic, inorganic or metallic pigments are used - allowing a wide range of colours and visual effects.
Fillers and additives
They aid application, improve flow-out and influence the surface texture. The most commonly used include silicates, talc, waxes, UV stabilisers and anti-caking agents.
Specialist additives
Modern formulations also include components with specific functions - for example antibacterial, anti-graffiti, conductive or heat-resistant agents.
Read also: ➡️ How to choose the right powder coating - practical tips
How is the production of powder coatings carried out?
The manufacturing of powder coatings combines chemistry, precision engineering and quality control. Every step affects the final structure and the properties of the coating, which is why keeping the right proportions and temperatures is critical.
Weighing and pre-mixing of raw materials
At the start, all components - resins, pigments, curing agents and additives - are accurately weighed in line with the formulation. They then go to the mixer, where they form a homogeneous mass of dry components. Already at this stage, the moisture content and flowability of the mix are checked.
Extrusion
The pre-mixed blend is then heated in a device called an extruder. At elevated temperature (typically 90-120°C) the components melt and merge into a uniform mass. At this stage the pigments and fillers are dispersed in the molten resin. Temperature and residence time in the extruder are set so that the resin and curing agent do not yet react - cross-linking only takes place in the curing oven.
Cooling and flaking
The molten mass is fed onto a steel cooling belt, where it solidifies and takes the form of a thin layer. Once cooled, it is broken down into fine flakes or chips. The material at this stage looks like brittle crisps.
Milling and sieving
The chips are then milled in impact mills down to the right particle size - typically between 30 and 80 microns. The material then passes through a system of filters and sieves, which remove contamination and particles outside the target size. The result is a uniform, free-flowing powder ready for electrostatic application.
Quality control and packaging
At the end, every batch goes through laboratory testing. The checks include density, particle size distribution, colour, gloss and cure parameters. Only after a positive result is the powder packed - typically into 25 kg bags - and dispatched to the warehouse or directly to the customer.
What are the types of powder coatings?
Powder coatings differ in the composition of their resins, which directly affects their properties and uses. The right choice depends on whether the coated surface will be used indoors or outdoors and what operating conditions the coating has to withstand.
Read also: ➡️ Types of powder coating - differences and uses
Polyester powders
Used mainly outdoors. They offer high resistance to UV radiation, moisture and temperature changes. They deliver a long-lasting colour and a smooth finish. Typical applications include fences, aluminium extrusions, steel structures and garden furniture.
Epoxy-polyester powders (hybrids)
Intended for indoor use, where abrasion resistance, chemical resistance and the ability to handle higher temperatures matter. They form a hard, attractive coating with strong adhesion. They suit the coating of metal furniture, white goods, warehouse shelving and machine parts.
Special powders
Solutions developed for specific technical or aesthetic requirements. The TOPO range includes, among others, antibacterial, anti-graffiti, high-temperature (up to 600°C), antimicrobial, fire-retardant and anti-corrosion powders, as well as decorative finishes - metallic and wood-effect.
Epoxy powders
Epoxy powders are a popular choice across many industries thanks to their high corrosion resistance and durability. They are not UV-resistant, so they perform best in indoor applications - for example coating medical equipment.
TOPO offers a broad range of powder coatings - from standard to specialist.
What determines the quality of TOPO powder coatings?
The quality of TOPO powder coatings comes from a combination of modern technology, careful selection of raw materials and strict control at every stage of production. The company works to standards confirmed by QUALICOAT, RoHS and REACH certificates, which guarantees stability of technical parameters and environmental safety.
- Raw materials and formulations - high-grade resins, pigments and additives from trusted European and Asian suppliers
- Control of the production process - modern production lines in China and Ukraine ensure repeatable parameters
- Quality and durability testing - tests of adhesion, gloss, scratch resistance and accelerated UV ageing
- Energy efficiency - low cure temperature (180°C / 10 min) means energy savings and a shorter coating cycle
- Compliance with European standards - meeting requirements on heavy metals, VOC emissions and powder reclaim
Read also: ➡️ How to choose a powder coating supplier - selection criteria
From formulation to the finish on metal
A well-made powder coating is no accident. It is the result of discipline - in the choice of raw materials, in process control and in the tests that show how the material will behave years down the line. When everything is in place, the coating does not just look good - it simply works: it protects, it does not fade, it stays bonded to the surface.
That is what separates a standard product from a powder coating that performs in the real world - in the coating facility, in transport, on a building facade. If you work with metal and want certainty about the final result, it is worth talking to the TOPO team.
TOPO can do it!
We will advise you on the technical side, help you select the right system and match the powder to your production line. Write to us – see what working with a manufacturer who really knows the process inside out looks like.
Match the finish to your project
Choose gloss level: matt, semi-matt, semi-gloss, gloss, high gloss.
Available surface textures: smooth, fine texture, coarse texture.
Need to check the coating before ordering?
Order a free sample.
