electrical & electronics | Technology Heat sinks in LED pool lights
Akboru Elektrik, a leading supplier of lighting systems for pools, hot tubs and gardens, selected Therma-Tech thermally conductive compounds from PolyOne to replace aluminium for heat sinks in LED swimming pool lighting. Collaborating with PolyOne enabled Akboru Elektrik to make a transition from metal to polymer that increased the expected useful lifetime of the lights by 200%. LEDs are much more efficient than incandescent bulbs, but
they still generate a lot of heat, and the diodes are sensitive to high temperatures. This is why aluminium heat sinks are often used to draw heat away from the diode to extend its performance over time. However, aluminium parts are heavier and more costly to manufacture, and present fewer design options than mouldable conductive polymers. Akboru Elektrik estimates the switch to Therma-Tech tripled the LED lighting products’ useful life and reduced part weight by 50%. Daily production rates for this lighting increased by up to 25%, and costs fell by more than 20% per unit.
ments inevitably involving high operating tempera- tures,” says compounder Lati. It says this is why the Fratelli Motta company decided to manufacture the spool of a series of transformers on ferrite using its Larton G/40, 40% glass fibre reinforced polyphenylene sulphide (PPS). All the components that make up a transformer are
subject to a host of very strict requirements. Tempera- ture resistance, for example, is set at a minimum of 150°C in continuous operation. Required flame retardance is V-0 at 0.42 mm. Dimensional stability of the product and the compound’s ability to fill even very thin cavities (less than 0.5 mm) are also fundamental. Finally, the ability to insert current carrying pins without incurring problems of breakage or deformation is necessary. “Larton G/40 is the perfect response to these demands due to the intrinsic self-extinguishing proper- ties of polymer, the excellent thermal performance and resistance to aging that stands comparison even with materials of the upper price range,” Lati claims.
White Paper A new E&E White Paper published late last year by DuPont Performance Materials provides a guide to the latest materials from the company that comply with non-halogen, flame retardant requirements, looks at key emerging trends, and outlines its applications development expertise. Entitled ‘DuPont Non-Halogenated Flame Retardant
Polymers for Electrical and Electronic Applications’ it is intended to help design engineers and material
36 INJECTION WORLD | March/April 2017
specifiers select the DuPont products that will bring the greatest benefits to their application, by improving performance while reducing the health and environ- mental impact of the materials used. The white paper reviews current legislation and also
outlines key standards and tests for E&E industry compliance, including: IEC 60335 and UL 94 for the safety of electrical appliances and the flammability of plastics used; EN 45545 for the fire testing of materials and components for trains; and UL 746 to evaluate the physical, electrical, flammability and thermal properties of polymers for electrical equipment.
Click on the links for more information: ❙
www.lanxess.com ❙
www.basf.com ❙
www.dsm.com ❙
www.dupont.com ❙
www.akro-plastic.com ❙
www.aschulman.com ❙
www.albis.com ❙
www.eurostar-ep.com ❙
www.lati.com ❙
www.nilit.com/plastics (now Celanese) ❙
www.vamptech.com ❙
www.corporate.evonik.com ❙
www.radicigroup.com ❙
www.polyone.com
Above: Fratelli Motta turned to Lati’s Larton G/40 PPS with 40% glass fibre for transfomer spools
www.injectionworld.com
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