Polyamide for Turbochargers
Until now, only high-performance plastics were able to withstand peak temperatures of up to 240°C in the engine compartment. A new specialty polyamide can now satisfy these temperature requirements thanks to innovative stabilization technology.
Saving weight through use of plastic components is a major topic when it comes to improving energy efficiency in the automotive industry. In the hot engine compartment, however, it is difficult to substitute polymer-based materials for metal. For instance, on diesel engines with turbochargers, the operating temperature in the charge-air system can be as high as 220°C and reach peak temperatures of 230 degrees Celsius.
At the K 2010, BASF will introduce a glass fiber-reinforced PA 66 that exhibits high heat aging resistance and can be processed easily. Thanks to this combination of properties, it is now possible to produce charge-air system components such as charge-air cooler flaps, resonators, charge-air lines and throttle valves – all of which are exposed to very hot air under the hood – from plastic economically.
The new Ultramid Endure is suitable for use at sustained temperatures of up to 220°C and temperatures spikes up to 240°C degrees Celsius. This improved heat aging resistance is achieved through formation of a protective surface layer that provides long-term protection against attack by oxygen at high temperatures.
For component design, the impact and strength characteristics at continuous-use temperatures are of special significance. When they are high enough, wall thickness can be reduced without compromising component reliability. The ultimate breaking stress of Endure at 200 degrees Celsius is considerably higher than that of comparable products. Moreover, the new plastic is readily processed with a much wider processing window than other high-performance plastics.
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