Plastic used as heat sink

Japanese electric vehicle pioneer, SIM-DRIVE has used a hybrid polyamide-aluminium to act as a heat sink for its latest concept car.

The SIM-CEL prototype uses a hybrid Stanyl TC551 and aluminium to act as a heat sink for its LED headlights. Heat sinks are normally made in aluminium that has much higher thermal conductivity than Stanyl (160 W/mK) but an all-aluminium heat sink would be over 25% heavier. As the Stanyl TC has very good flow properties it enabled engineers to design the part with thin walls and a high surface-to-volume ratio to get very good heat dissipation.

The car also uses a body panel featuring DSM's EcoPaXX polyamide 410 and a wheel cover centre cap in the same material. EcoPaXX polyamide 410 is 70% resourced from the castor plant and is certified 100% carbon neutral from cradle to gate and both parts are 50% lighter than a metal version.

This enabled the concept car to hit weight targets to give it the necessary performance. The SIM-CEL prototype has a range of 325km on a single charge and acceleration from 0 to 100km/h in just 4.2s.

EcoPaXXs has very good flow properties, excellent surface finish and is resistant to high temperature to enable inline painting. It also absorbs little water and has a very good dimensional stability. It also has sufficient elasticity to enable assembly with snap fits.

Justin Cunningham

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