TPT July 2011

C oating , P iCkling & g alvanising

EMMEDI polyethylene coating equipment

EMMEDI Polyethylene Coating Equipment is based on its highly proven solid state based on IGBTs technology (inverter power over 2 Megawatt), which allows a consistant and proper heat treatment of the full body of the tube or pipe at a temperature which goes between 180°C and 240°C. The temperature of the tube is controlled by an optical pyrometer

targeting the tube surface between inductor and PET extruder of the tube where is applied the polyethylene coating in order to comply with the American Petroleum Institute – API standards and American Society for Testing and Materials (ASTM) requirements. Tubes and pipes with polyethylene coating are guaranteed in working

conditions, which are typically between -40 and +80°C and they are proved to a test voltage insulation at 25kV. The ordinary applications of these coated pipes are: oil and gas pipe lines, urban gas distribution, outdoor pipe line and so forth. Indeed, the coating of metallic tubes and pipes with a polyethylene film extruded is an excellent modern process to protect tubes surface against chemical aggression due to the soil acidity, the corrosion due to the leakage currents, and mechanical aggression due to the ballast. Inductors are coaxial to the pipe, multiturns, water-cooled inside with deionised water and the typical gap to the tube is 60 to 150mm on the radius with an operating frequency in the range 0.1 to 5kHz. Saet SpA – Italy Fax: +39 011 9974328 reduced manufacturing costs,” explained Mr Talalla. “To our knowledge, we have the only high performing thick-film heating technology on aluminium available today.” By using aluminium, the heating solution is lightweight and offers superior thermal conductivity thereby delivering more heat, more efficiently to its intended target. “Datec is enabling the next generation of products for the consumer, medical, semiconductor, aerospace, and automotive heating markets,” added Mr Talalla. Datec Coating Corporation, located in Mississauga, Ontario, is an innovative high-tech materials company providing unique heating solutions and coatings for high performance products. Datec’s operating philosophy is to build a true partnership with customers and partners from concept development to product design and manufacturing. Datec Coating Corporation – Canada Email: info@saetgroup.com Website: www.saetgroup.com

The Emmedi polyethylene coating equipment

Vicote ® coatings enables ultra-fast aluminium thick-film heater technology

WHEN Datec Coating Corporation was developing its new thick-film technology for applying a high power electric heat source to an aluminium substrate, it chose Vicote ® Coatings from Victrex Polymer Solutions as the insulating component for the top and bottom dielectric layers of the thick-film element. Datec’s thick-film heating system has integral conductive and resistive layers, which are screen- printed directly onto an aluminium heat sink that is coated with Vicote Coatings. This UL recognised and RoHS compliant technology is used to manufacture fast- acting, low-profile heaters that offer unsurpassed performance advantages including high thermal conductivity and responsiveness for a wide range of industrial and consumer products. Previously, heaters of this performance level could only be printed on stainless steel and alumina substrates. According to Datec CEO, Dominic Talalla, “The key to Datec’s innovation is the combination of the dielectric material containing the Vicote Coating and the patented conductive and resistive materials. The Vicote Coating is

an excellent binder which, when combined with our other components, creates a strong bond to the substrate and provides excellent dielectric strength. It works very well with our resistor and conductor layers and together the layered system absorbs thermal expansion mis-match between the heating layers and the substrate.” Vicote Coatings are based on Vitrex ® Peek™ polymer, one of the highest performing thermoplastic materials in the world. The coating’s crystalline structure provides exceptional scratch and wear resistance, strength and durability, especially at high temperatures leading to longer-lasting components. The dielectric properties of Vicote Coatings ensure even temperature distribution with no hot spots, fast heating, and high energy density. The result is faster, more accurate operating cycles and a reduction in energy consumption by 20%. “Another key aspect of our technology is that it is processed at low temperatures, well below the 850°C (1,076°F) required to process glass-frit based thick-films. This enables the use of new substrates and

Email: dadkin@victrex.com Website: www.victrex.com Website: www.datec.coating.com

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J uly 2011

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