Coated belts
Coated belts are used wherever the surface properties of a belt need to be enhanced for a specific application by applying a suitable coating material. While the base belt is primarily designed for power transmission and dimensional stability, suitable coatings provide additional functional properties.
Alphabelt develops customised coating solutions that can specifically influence properties such as friction, wear resistance, temperature resistance and chemical resistance. A wide range of coating materials, hardness grades and surface profiles is available for this purpose. Our specially developed coating processes also enable us to create demanding customised solutions. The selection of the most suitable material combination depends on the conveyed product, mechanical loads and the respective operating conditions.
Suitable for every type of base belts
Basically, all types of base belts can be coated. Timing belts, V-belts, poly-V-belts or conveyor belts are available in various materials such as PU or neoprene, which can be permanently bonded to a wide variety of materials. Depending on the combination of materials, we apply the coating by vulcanizing or welding, and in certain cases also by bonding or spraying.Features of the coating
Both the material of a coating and its specific properties, as well as the design of its surface profile, can be used to achieve certain functions. Material-specific properties include, for example, hardness, chemical resistance, coefficient of friction, elasticity, temperature resistance, and insensitivity to dirt or adhesives. By a careful selection of the surface texture, the grip properties can also be favorably influenced: Lengthwise or crosswise grooves, knobs, saw-tooth, waffle, herringbone or super-grip profiles optimize the contact surfaces with the transported goods.Examples for coatings
Anti-slip coatings
Anti-slip coatings, mostly made of PU or APLN, facilitate the slip-free transport of wet or very smooth parts. They are welded directly onto the belt back. Lengthwise grooves in the surface prevent the formation of a moist film between the goods being transported and the belt. Such coatings are used, for example, for positioning of stone and glass plates. In addition to good grip properties, PU coatings also feature good resistance to abrasion, oils and greases, chemicals and solvents.Temperature resistant coatings
Für For the transport of hot goods, a cover made of felt is often the first choice. At temperatures of up to 250 °C, aramid felt is sufficient. For higher temperatures up to 300 °C, a paraaramid felt can be used, which even withstands up to 550 °C for short periods. Alternatively, a Viton coating is available, which is temperature-resistant up to 275 °C
Antistatic coatings
Antistatic coatings are used to avoid contamination or dust adhesion as far as possible, for example in the food, pharmaceutical or tobacco industries. These are usually made of polyamide, silicone or chrome leather.Linatex and LCN coatings
Where high elasticity and wear resistance are required, Linatex is a well-proven coating material. Alternatively, LCN rubber can be used, which has even higher abrasion resistance and mechanical strength, is more resistant to pressure and temperature, and is easier to process. LCN can be glued onto the base belt or vulcanized on without joints.Multi-layer coatings
Coatings consisting of two or three different stacked layers can be combined if required. Such "sandwich designs" are used for tasks where a single coating material alone does not provide all the required properties. For example, a combined coating of Sylomer and silicone is used in the glass industry for conveyor belts. Sylomer is a PUR elastomer that can withstand pressure and is very elastic, thus ensuring full-surface load transfer. The top layer of silicone repels adhesives and dirt and, with its high coefficient of friction, ensures reliable entrainment of the goods being conveyed.Coatings for the running surfaces
Coatings are not only available for the back of the belt, but also for the running surfaces and the toothing. They are mainly used to extend the service life of the belt. For example, overlays made of abrasion-resistant polyamide fabrics protect the running surfaces from heavy abrasion. Coatings made of PVC increase resistance to oils and greases, while nylon fabrics can reduce friction and reduce noise emissions.
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