MATERIALS | AUTOMOTIVE
bio-based content, as well as carbon negative additives,” said Scott Nakon, global automotive market manager at Teknor Apex. “We also plan to introduce new TPEs with up to 65% post-consumer recycled content, and expand the Recyclon portfolio of recycled polyamides.”
Nylons for EVs Celanese has launched two new polyamide grades for manufacturers of Electric Vehicle (EV) power- train components and battery applications. Its Frianyl PA W-Series of flame-retardant
materials allows the manufacturing of large, thick-walled, flame-retardant components for EV batteries. It enables manufacturers to improve the safety of these components, introduce novel new designs and enhance manufacturing efficiency. Potential applications include battery module housings, e-box housings and covers. The W-Series solutions achieve V-0 flame
retardance at 1.5mm, combined with excellent flow characteristics. Compared to standard PA66 grades with 30% glass fibre reinforcement, the equivalent grade of the new W-Series offers a 10-20% im- provement in flow in an injection mould, says Celanese – depending on the pressure applied. Improved flow means manufacturers can consider new designs and more readily fill moulds during processing, which could reduce cycle times. The materials also have good performance with all common laser marking processes. The materials also offer good Comparative
Tracking Index (CTI), even after aging at 125°C for 1,000 hours. Long-term colour stability of parts made from these materials, measured at 125°C,
also shows no visible change to the eye, and only a nominal change when measured in a colour lab. In addition, Celanyl PA B3 GF30 E is a new polyamide-based compound for structural and semi-structural EV powertrain applications. With this grade, the HB flame class is achieved, as well as a CTI of 600 – even after 3,000 hours of ageing at 150°C. Its low halide content makes it an electrically friendly option for applications such as connectors, switches, relays, busbars and sensors – which can malfunction or short circuit when voltage is applied. The material helps manufacturers overcome malfunctions caused by three common factors: surface moisture, elevated temperature and traces of halide ions such as chlorine, bromine or iodine, which can lead to electrolytic corrosion. Prior to this, Celanese showcased a number of
materials at the Battery Show in Michigan last year. These included three new Fortron PPS grades with high thermal shock resistance, for metal over- moulding applications. These mitigate part fracture or loss of function and are aimed at EV compo- nents such as busbars, fluid pumps, sealed systems and electrical connectors. Forton PPS and Zytel HTN are also featured in a Celanese material-pro- cess-service solution for overmoulding busbars to reduce manufacturing time and cost while main- taining performance and safety standards. In addition, it demonstrated a hybrid thermo- plastic aluminium cooling plate developed with Tier 1 supplier Novares. Based on Celanese ZytelBond treatment technology, it bonds and welds aluminium to injection-moulded parts made of Zytel PA, Zytel HTN or Celanyl PA.
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