Carbon infra-red elements offer reliable drying
A
Heraeus Noblelight product story
Edited by the Engineeringtalk editorial team
Aug 26, 2004
A carbon infra-red system is helping Orvec International to achieve the quality of nonslip coating required on disposable tray mats to meet the stringent demands of major passenger airlines.
A carbon infra-red system from Heraeus Noblelight is helping Orvec International to achieve the quality of nonslip coating required on disposable tray mats to meet the stringent demands of major passenger airlines.
Orvec International is a world leader in the design and manufacture of hazard protective workwear and passenger care products.
Its range of disposable tray mats can be in paper or crepe, coated and uncoated and printed to a very high standard.
When the Kingston upon Hull company recently decided to introduce a new range of nonslip tray mats to meet the specifications of a major airline, a new manufacturing line was set up and the manufacturing technology was adapted to allow an extremely high quality nonslip coating to be applied.
The process required infra-red radiation treatment at high speeds and Orvec contacted Heraeus, who carried out proving trials at its applications centre in Neston.
These established that a carbon infra-red system could achieve the required result at web speeds of up to 70m/min and, as a result, a full-size system was installed at Orvec.
This consists of two, 20.7kW carbon infra-red cassettes, each containing nine, 2.3kW carbon infra-red medium-wave emitters.
The cassettes can be operated individually by means of a closed loop thyristor control system to ensure precise drying profiles.
Since installation, the infra-red system has proved to be highly energy-efficient and its high power density has ensured that the applied coating is treated effectively to give a high quality finish.
The fast response of carbon infra-red has also proved important in this application, as the heating can be switched off very rapidly if needs be, so preventing any damage to the web in the event of production line breakdown.
Following successful operation of the system over a number of months, Orvec decided to see if line speeds could be increased even more, to meet rising customer demand for the nonslip trays.
Accordingly, a 7kW carbon infra-red element was retrofitted and this has allowed a further 30% improvement.
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