The application of plasma coatings to components used in the adhesives and labelling industry such as aluminium rolls, glue applicator wheels, glue pans, glue tanks, rotary die cutters, scrapers, waste matrix take off rolls and waste removal ducting offers a highly effective and more affordable alternative to traditional coatings.

Repairing components with alternative types of coatings, like polymers that do not have a thermally sprayed matrix coating, can prove to be very costly – as can replacing parts. Plasma coatings provide time and cost saving benefits, extending component service life and improving component performance.

Thermaspray coatingsPlasma coatings consist of a base (matrix) coating which is applied through a thermal spray process, followed by the application of a final layer of polymer coating. Thermal spraying is the method of depositing a metallic, or non-metallic, powder onto the surface of a component by feeding the powder into a heat source, and thereafter into a high velocity gas stream.

Molten particles are propelled by the high velocity gas onto a prepared substrate surface, where a mechanical bond occurs between the substrate and the coating. This base coating is applied by one of four different types of techniques: Combustion Wire Metallizing, Electric Arc, Plasma or High Velocity Oxygen Fuel (HVOF).

The plasma polymer spray system, a dual coating technique, combines the advantages of thermally sprayed coatings with polymer based top-coatings to offer the benefits of wear resistance, non-slip and traction characteristics.

The coating properties of plasma coatings include release (non-stick), corrosion- and wear resistance, traction and release and low friction. These coatings deliver a number of benefits, including improved surface integrity, improved component efficiency, enhanced quality of the surface interface, noise reduction, elimination of generated static electricity, lower Coefficient of Friction (COF), and combined wear and chemical resistance.

The properties of plasma coatings make them ideal for the food processing, plastics and paper, tyre and rubber, packaging, printing and pulp industries. This technology was not available to South African industry until 2014, when Thermaspray, in partnership with Plasma Coatings USA, a Division of American Roller Company, became the first local company to introduce plasma coatings.

Thermaspray, in a joint venture with Cape Town-based Surcotec, offers an extensive portfolio of engineering and thermal spray coating solutions. The companies’ wear- and corrosion-resistant thermal spray coatings, Plasma Transferred Arc (PTA) cladding and Polymer coatings are backed by a host of specialised allied services.

Visit the website: http://www.thermaspray.co.za/


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