DSM launches next generation of Diablo high temperature polyamides

The new grades are aimed at applications in automotive engine compartments and temperatures as high as 260°C.

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The new grades are part of both DSM’s Stanyl polyamide 46 and Akulon 6/66 product lines, providing a significant improvement in long-term temperature resistance components such as air intake manifolds with integrated intercoolers, ducts, charge air cooler end caps, mixing tubes and resonators used in the latest car engines.

The latest version of Stanyl Diablo polyamide 46 is able to withstand a continuous use temperature of 230°C/446°F, while the new Akulon Diablo withstands a 220°C/428°F continuous-use temperature. Both new grades have improved resistance to short-term high temperature peaks as measured by deflection temperature under load (HDT). New Stanyl Diablo has an improved HDT of 267°C/513°F, while the new Akulon Diablo has an HDT of 245°C/473°F. DSM claims the materials’ long term heat aging and HDT are superior to competing materials currently on the market.

The new grades also have improved resistance to chemicals and gases in EGR (exhaust gas recirculation) systems. They have very good processing properties and create finished parts with high burst pressure weld-line strength as well as excellent surface finish.

The automotive industry’s constant drive to create more fuel-efficient designs has resulted in reduced space and higher temperatures under the hood, due in part to the inclusion of such new features as improved pedestrian impact protection and the increasing use of turbochargers and superchargers. DSM asserts that its next generation Diablo grades help manufacturers in this innovation challenge by providing unprecedented heat resistance, both long-term and short term.