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Last Updated Tuesday, October 6 2015

Travel on Turkish Buses is quieter Thanks to BASF

Published November 25, 2013
 The leading Turkish bus manufacturer Otokar utilizes BASF's Basotect as sound absorber in the engine compartment for its bus models. To design and produce the various acoustic parts, the company partners with Teknofoam, the Turkish converting facility of Recticel, based in Istanbul.

Teknofoam selected Basotect G, a lightweight melamine resin foam from BASF, as sound absorber for the engine compartment. This flame-retardant open-cell foam achieves high sound absorption figures in the medium and high frequency range. In order to achieve good sound insulation over the whole frequency range, Teknofoam covers Basotect with a specially designed polyurethane film. This film and an additional nonwoven fabric layer also protect the foam from water and oil.

The decision by Teknofoam to use Basotect in bus engines means that the BASF foam is now present in every important means of transport. Its excellent acoustic properties are already creating quieter travelling conditions in cars, trams, trains, aircraft and aerospace.

Heat resistance is crucial for any foam used in bus engine compartments. With diesel engines producing up to 213 kilowatts, temperatures of around 120 degrees Celsius occur regularly. Basotect offers long-term resistance to these high temperatures. In addition to specific requirements for acoustics and heat resistance, the various parts had to be designed and shaped according to the position of the engine, the cooling system or the exhaust system. “Using our computer controlled cutting, sawing and milling techniques, we could configure Basotect to the precise size and 2D or 3D shape. By providing the right pre-cut pieces according to CAD drawings, we also helped Otokar to reduce its installation time,” explained Murat Hapci, deputy general manager of Teknofoam.

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