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DuPont releases low-emissions grades of Delrin acetal homopolymers

07 December 2009

DuPont has introduced new low-emission grades of DuPont Delrin, which provide extremely low volatile release without a reduction in mechanical performance versus the standard high performance grades, including excellent creep and fatigue resistance. As a result, the high performance acetal homopolymers, which are categorised by their viscosity, are well within the formaldehyde emission requirements of the leading automotive manufacturers, creating new opportunities for their adoption in automotive interior applications.

The new low-emission grades are globally available in three basic melt flow series: Delrin 100PE, 300PE and 500PE, with Delrin 100PE being the most viscous. All three have been specially formulated with an additive to substantially reduce their release of formaldehyde during processing and use to levels which meet even the most stringent of emission requirements demanded by today’s leading automotive OEMs. Subsequent testing of low-emission Delrin, carried out by SGS Institut Fresenius GmbH in Germany in accordance with the VDA (Verband der Automobilindustrie) standard 275, confirms the outgassing of formaldehyde from all three grades to be below 2 mg/kg.

As well as an extremely low volatile release, the new low-emission Delrin grades provide the same high mechanical performance as the standard grades in terms of its strength, stiffness, creep and fatigue resistance and impact strength. “Our achievement in developing the first acetal homopolymer to meet the emission standards of all leading OEMs, without compromising mechanical performance, will open up new opportunities for the cost-effective replacement of existing materials in many automotive interior applications,” says Hans-Hermann Kirner, automotive car interior development manager at DuPont. “These include, for example, components for safety systems, door panels and seats, where its unique combination of properties can be of great benefit.”


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