Functional coatings: Spray application with WAGNER equipment

Functional coatings typically aim to alter the surface functions as well as the properties of a component. Unlike decorative paint, where the primary concern is aesthetic preference, functional coatings are mostly applied for protective purposes. In this way, the surfaces are to be provided with new or improved propertiesdepending on the nature and requirements of the component or object. This includes, for example, improved wear protection or corrosion protection for increased longevity of the object. Surface protection against heat, weather or any other damaging influences is basically necessary for every building, every system and almost every object in one way or another.

We provide insights into surface protection with functional coatings - applied with various WAGNER professional spray equipment.

HC 950 E innen Holz Flammschutz Hebebuehne hart

Acoustic plaster: sound-absorbing plaster for ideal room sound

Sound-absorbing plaster is one option for sound absorption for good room acoustics - in addition to pre- or suspended constructions. Here, sound-absorbing plaster has the advantage that existing surfaces, namely walls and ceilings, are used and improved. This way, there is less need to encroach on the space and disguise it as decoration. Acoustic plaster is a mineral plaster with admixed materials such as natural stone. The surface properties and grain composition contribute to the absorption of airborne sound. The sound energy is converted into thermal energy: the sound heats up the surface. This has the additional advantage that less heating energy is required. The thicker the layer of sound insulation plaster, the higher the sound absorption.

Acoustic plaster is used in particular in large projects such as concert halls, theatres, opera houses and other buildings where perfect acoustics must be ensured. But precisely because the surfaces to be coated are enormous, a system is needed for fast application and, at the same time, seamless and uniform even coats is essential. One solution is to spraythe plaster with a WAGNER unit such as a model from the PlastCoat series. The screw pump installed in it is the powerhouse from WAGNER for highly viscous materials with grain, fillers or fibres - so it also manages acoustic plaster without any problems!

Fire protection coating for steel: everything rises and falls with the steel framework

In the field of fire protection, it is not a question of completely preventing or containing a fire - the fire protection coating must provide enough timeto be able to save people, animals and objects if the worst comes to the worst. Therefore, a fire protection coating for steel girders is also required when industrial construction takes place: Steel is neither flammable nor does it emit dangerous gases, but it loses its load-bearing capacity and thus static stability within a few minutes under high heat.

Especially where steel structures support many components of the building, a fire protection coating for steel is necessary:

Airports and railway stations
Exhibition halls and warehouses
Event, sports centres and department stores
industrial, administrative and residential buildings

HC 950 Hebebuehne Korrossionsschutz hart

A functional coating such as a fire protection coating usually has a slightly higher viscosity. Therefore, the use of more powerful spraying equipment from WAGNER with a piston pump - such as a model from the HeavyCoat series- makes sense. In this way, you combine careful even application for perfect functionality with the speed of the process with a sprayer.

By the way: With the spraying equipment from WAGNER, you can apply fire protection coatings for wood and concrete in addition to steel fire protection coatings.

Food-safe coatings: so that food remains edible

In agriculture and the food processing industry, machines, equipment and objects that have direct contact with our food are in use every day. These tools also need protection against corrosion, rust and damage from wear and tear. However, care must be taken here with the paint or functional coating that it does not in any way contaminate the food with problematic or health-endangering substances. Therefore, all machine parts that have direct contact with food must be treated with a food-certified coating. This can include certain parts of a tractor or agricultural machine, through to troughs, fruit and vegetable bins, silos or tanks. But refrigeration and storage rooms should also ideally be food-safe coated, here there is indirect food contact - when there is condensed water dripping from the ceiling onto the food, for example.

However, resistance to chemicals and cleaning agents is also relevant for a good food-safe coating. After all, such surfaces are meticulously cleaned on a regular basis. The development of a biofilm, i.e. the formation of microorganisms, must also be prevented. A multifunctional coating is therefore indispensable - but even this is of little help if it has not been applied professionally.

Food-safe coatings are typically of medium viscosity and can be applied in uniform and opaque layers particularly well with a sprayer. What is also perfect is that without tools touching the coated surface, there is no unwanted texture or nicks and holes in the coating. In addition, angles and corners are easy to reach and coat.

In the pictures you can see how a food-safe coating can be sprayed: Our application engineer Jürgen Stecher has treateda fruit and vegetable trough with a food-safe coating.The SuperFinish 23 Pro with a diaphragm pump as the delivery technology, equipped with a TempSpray H126 heated hose and the 5-litre hopper for small-volume processing was used.

Thermal coatings: Polymers for heat reflection

A thermal coating reflects heat or cold and thus maintains the climate in the room. Accordingly, they are important for buildings (refrigerated or storage rooms), trucks (refrigerated transport) or containers (shipping containers). The thermal coating contains special polymers that reflect the heat - even with a low layer thickness. Even in strong sunlight, you can achieve temperatures that are 8 to 10 degrees lower than without a thermal coating.In addition to the classic areas of application such as food refrigeration, there is also the area of application in humanitarian aid: Schools, medical buildings and residential buildings in particularly hot regions can be protected against high temperatures with a thermal coating. In our latitudes, a thermal coating is also suitable for drastically reducing the energy consumption caused by air conditioning.

However, these polymers are sensitive substances - the high pressure of the atomisation of regular airless devices would destroy them. However, at WAGNER we have the possibility to make a perfect application possible with the help of the Zip 52 low-pressure double diaphragm pump! In the video you can see more details about the Zip 52 and step by step guide on how to spraya thermal coating using it. Here is how you proceed with a Zip 52 double diaphragm pump to apply the functional coating by spraying:

Stir the material with a low speed agitator
Dilute with water (approx. 5 %) - stir again
Setting the material pressure
Check the amount of material with the gun triggered
Set the air pressure for the atomiser gun
During the spraying process, let a pneumatic agitator continue to slowly agitate the functional coating - this way no components can settle out

With the latest innovative conveying technologies and components that we at WAGNER develop and integrate into our spraying equipment, you can even spray sensitive materials such as polymers. And all this with the fast and efficient manner that characterises not only spray application, but especially the products from WAGNER

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TempSpray H 126

The material heater that simplifies your work - perfect surface finishes through reduced viscosity

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Zip 52

Lightweight unit for use with air-atomising paint guns

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5-litre capacity for emulsion applications

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