Thursday - October 13, 2016

LED lighting with efficient heat sinks

Benefits of polycarbonate: excellent thermal conductivity, plenty of design freedom

LED lighting technology is becoming increasingly established as a highly efficient method for generating light. Covestro therefore is fueling the further expansion of LED technology with its tailored material solutions, including a design for heat sinks that effectively dissipate the heat generated by LEDs. Heat sinks are critical to ensuring the long service life of LED lamps.

At K 2016, the company is exhibiting prototypes of working lamps incorporating heat sinks made of the highly filled polycarbonate Makrolon® TC8030. This material has a very high thermal conductivity of 20 W/m*K (“TC” stands for “thermally conductive”) and was developed specifically to meet these requirements.

Working prototype
The prototypes were manufactured by eurnortech LED solutions in Oberpframmern, Germany, and can be used in various lighting solutions. The lenses were sourced from the Finnish company Ledil Oy, the LEDs from Osram. The functional components confirm that the material is ideal for heat sinks in LED lamps.

“Compared to the aluminum typically used, this plastic offers both good thermal conductivity and a high degree of design freedom,” says Axel Wetzchewald, head of marketing for LED applications in the Europe, Middle East, Africa and Latin America region at Covestro.

The heat sink design originated in a collaborative project between Covestro, Karelia University of Applied Sciences (UAS) and the Finnish injection molding specialist Vesuto Oy. A comparison of the heat sink made from Makrolon® TC8030 with similar components made of other polymers shows that the polycarbonate very effectively dissipates the heat generated by LEDs on built-in printed circuit boards.

Visit us at the K 2016 plastics trade fair in Düsseldorf, Hall 6, Stand A 75, from October 19 to 26. Find more information at

About Covestro:
With 2015 sales of EUR 12.1 billion, Covestro is among the world’s largest polymer companies. Business activities are focused on the manufacture of high-tech polymer materials and the development of innovative solutions for products used in many areas of daily life. The main segments served are the automotive, electrical and electronics, construction and the sports and leisure industries. Covestro, formerly Bayer MaterialScience, has 30 production sites around the globe and as of the end of 2015 employed approximately 15,800 people (full-time equivalents).

This press release is available for download from the Covestro press server at

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This press release may contain forward-looking statements based on current assumptions and forecasts made by Covestro AG. Various known and unknown risks, uncertainties and other factors could lead to material differences between the actual future results, financial situation, development or performance of the company and the estimates given here. These factors include those discussed in Covestro’s public reports which are available on the Covestro website at Covestro assumes no liability whatsoever to update these forward-looking statements or to conform them to future events or developments.