Lanxess showcases automotive protection at VDI conference

Next week's DVI conference will be a showcase for a selection of materials for automotive use.
Designs based on the continuous-fibre-reinforced thermoplastic composite Tepex offer cost-effective lightweight construction for automobiles, and Lanxess will demonstrate its advantages at the VDI Conference next week.

It will be using the underbody protection from a German compact car to demonstrate the advantages of Tepex as the overlay for locally reinforcing thermoplastic compression moulded parts. The component is created in a DLFT (direct long fibre thermoplastic) process from a polypropylene compression moulding compound. According to the company the Tepex dynalite 104-RG601 (PP&GF) inserts triple the strength and energy absorption of the DLFT component.

In Mannheim, Germany, (March 18 and 19) the company will also be showcasing a material innovation for the DLFT compression molding process, Durethan B 24 CM H2.0. This polyamide 6 has better flow properties than conventional polyamide 6-based long-fibre moulding compounds. It also produces no flue gases on extrusion. Its heat resistance means the material can withstand the temperatures involved in cataphoretic painting (CP), offering a CP-capable alternative to polypropylenes in the DLFT process. As a sample application, the company will be presenting the demonstration model of a trunk recess for a German sports car.

Examples of the hybrid molding process, where Tepex inserts are simultaneously moulded and back-injected in an injection mould include the seat shell for a compact car. In the event of a crash, the component absorbs considerably more energy than comparable designs using sheet steel or plastics reinforced with long glass fibres, claims the company. The safety component is approximately 800g lighter than previous versions.

Also at Mannheim, the company will show Durethan BKV 60 XF. Like the series-tested Durethan DP BKV 60 H2.0 EF, this polyamide 6 is reinforced with 60% glass fibres. It has the same mechanical property profile but with a melt flow that is more than 30% better.

Another material, Pocan B 5220 XF is a glass-bead-reinforced material specifically designed for fuel caps. It is dimensionally stable and withstands the temperatures involved in cataphoretic painting. It is an alternative to polyphenylene ether and polyamide blends and mineral reinforced PBT or polyamide compounds.

Applications for halogen-free flame-retardant Durethan polyamides, including a carrier for high-voltage components in the battery system of an electric vehicle is made from injection-molded Durethan BKV 20 FN01. Thanks to its organophosphorus flame retardance package, this tough polyamide 6 achieved the best classification, V-0 (0.75mm), in tests to the American standard UL 94 (Underwriter Laboratories).

Caroline Hayes

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