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partnered with BRT to sell and distribute the additive globally. “Through a novel carbonisation process, we’re able to turn this abundantly produced and tightly controlled biomass input into a high quality bioderived carbon,” said Bohnert. A patent- pending technology controls surface morphology. BRT’s product for conductive applications is TruBlack ESD, which can be combined with other additives to support control of surface resistivity in the ESD range in finished plastic parts. It can be used, for example, along with a conductive carbon black or carbon fibre in moulded PP as well as other plastics, to tailor ESD values, said Bohnert. BRT has built a pilot plant that is
capable of producing 1.2m lbs/year of bio-derived carbon, which will be available for both pigment and industrial uses. Next steps include scale up of the process and
Above: Insight Polymers produces concentrates and compounds for conductive applications
expansion into conductive applications. Delta Tecnic’s latest is a masterbatch with 75% loading of magnetic fibres for conductive and EMI shielding applications in automotive, electronics, and telecommunications. The company says the masterbatch can be used to make fully formulated compounds or can be used directly in injection moulding. A key use is EMI shielding in automotive parts,
particularly in electric vehicles, where high-voltage cables generate electromagnetic fields that can interfere with other electronic systems, the company says. Other uses are to reduce risk of static discharge in PVC flooring for critical
environments, such as hospitals or electronics manufacturing facilities, and in wheels for industrial trolleys. The company also supplies conductive PVC compounds using conductive carbon black, carbon nanotubes (CNTs), or graphene as the conductivity additive, depending on the needs of the application. Conductive carbon black typically requires between 15-30% loadings, which can affect physical properties. CNT loadings are in the range of 3-7% and graphene loadings are 2-5%, the company says.
Additive manufacturing Insight Polymers launched a product line of concentrates and fully formulated compounds containing CNTs for conductive and ESD parts made using additive manufacturing. “Applications for electronics manufacturing include jigs and fixtures that can be efficiently produced using 3D printing,” said Matt Torosian, Insight Polymers Sales and Market Development Manager. “Dunnage, such as trays and totes for transporting parts, is another application. Anything with a chip in it needs ESD as it is carried through manufacturing.” The new product line includes glass-reinforced PET, PET-G, PC/PBT, carbon-fibre reinforced PEEK, PP and custom products. The concentrates are loaded with 15% CNTs. In additive manufacturing processes, the
formulation must be designed both for good dispersion of the CNTs and for the polymer to print well, typically in either a fused filament fabrication (FFF) or direct pellet extrusion 3D-printing process. “CLTE [coefficient of linear thermal expansion] is
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