Stanyl®
ForTii™ and Arnite®
Significant improvements in LED performance and cost have caused LED technology to begin rapidly replacing conventional lighting solutions such as incandescent and fluorescent lighting. LED lighting is substantially different from conventional solutions, with smaller light sources, the need to be cooled, emission of a different spectrum of light, and a lifetime up to 50 times longer.
To make the best use of all the benefits of LED, DSM has created new highly reflective materials that are developed specifically for this new technology. The materials used typically require a bright white color in order to reflect light or to match the appearance of the application. Yet light output from LED lamps and luminaries degrades over time. Next to the degradation of the LED and the driver electronics this is caused by the degradation of the optical system, specifically discoloration of the reflector. Also during the production process of the LED solution polymer discoloration needs to be avoided. For instance soldering can also cause severe discoloration of white plastics.
RFLX in reflective LED applications LED array holders: Stanyl® ForTii DSM developed a new white grade of Stanyl® ForTii (F11CW), specially
formulated for the challenging requirements of an LED array holder. The shallow ring connects the LED array to all the interfaces – mechanical, electrical, thermal and optical – and to the luminary.
Example of discoloration in heat aging simulations
LED array holder made from Stanyl ForTii
The fine metal inserts in the ring cannot resist high forces caused by the material flowing into the mold, yet a high fill rate is required to secure stiffness, with a good flammability rating (V0 at 0.2mm) and bright white color. Aſter molding, the ring must survive the screw force from the fixation to the luminary, and the white color must survive the high temperatures required to reflow solder the LED array to the ring without discoloration. Stanyl ForTii has proven itself the material of choice to successfully meet all of these challenging requirements.
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