COMPOUNDS | ELECTRICALLY CONDUCTIVE
Right: Graphite additives can provide electrical conductivity with improved flame retard- ance, according to Georg Lüh
flame retardant can be processed at temperatures up to 260 °C. Georg Luh’s technical experts describe potential
applications for graphite as ‘endless’. The company is currently involved in a research project involving new types of electrically conductive composite materials offering a fresh approach to medical technology where Graphene Nano Platelets (GNP) such as GHL A 10 are used. Consisting of several graphene layers, they offer exceptionally high electrical and thermal conductivity due to their almost two-dimensional structure and are ideal for thin films, or as a ‘booster’ for graphite-filled compounds. At the 2023 Compounding World Expo in Cleveland in the US last year, Luxembourg-head- quartered Orion Engineered Carbons highlighted its broad portfolio of conductive additives for wire-and-cable applications, injection-moulded parts, films, and piping, along with performance- boosting carbon blacks. Marketed under the Printex, Arosperse, and other brand names, these grades ae said to disperse readily in polymers and show very low levels of ionic contamination. Orion recently opened a second carbon black
production plant in China. The facility in Huaibei, Anhui province, will operate two production lines with a total capacity of 70,000 tonnes/yr. “The Huaibei facility is a huge milestone for Orion,” says CEO Corning Painter. “The state-of-the-art plant enables us to better support our Chinese customers with products that are made in China. Now we can reallocate production lines in the US and Europe so that we can increase supply in those markets.”
Sheet shielding Created from the merger of the DSM Engineering Materials and Lanxess High Performance Materials businesses, Envalior is offering new thermoplastic composite sheets under its Tepex brand compris- ing several layers of long and/or continuous fibres that can provide levels of electrical conductivity.
Depending on requirements, each layer can be
reinforced with special fibre textiles — including electrically conducting carbon fibre — and the total fibre content can be more than 50% by weight. Polyamides or other engineering plastics can be used as matrix materials. The sheets can be com- bined with injection moulding grades using over- moulding to create high strength hybrid structures. “This composite is especially good for housings
that are subject to very high mechanical loads. And the carbon fibres make it the material of choice when the housing needs to be electromagnetically shielding,” says Dr Dirk Bonefeld, Head of Tepex Product Management.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.wittenburggroup.com �
www.polyplastics.com �
www.eurotec-ep.com �
www.adeka-pa.eu �
www.avient.com �
www.imerys.com �
https://insightpolymers.com �
www.cabotcorp.com �
www.luh.de �
www.orioncarbons.com �
https://envalior.com
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IMAGE: GEORG LÜH
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