AUTOMOTIVE | UNDER THE HOOD
engineering materials that provide strength, perfor- mance, lighter weight, flame retardancy, better efficiency and cost reduction for parts that are used in EVs. The company produces PA 6 and 66 compounds under the Tislamid brand name with standard and modified formulations for customer requirements. PA 6 compounds with short glass fibre reinforcement are used for EVs: Tislamid 66 with 30% glass fibre, hydrolysis- and heat-stabi- lised, and improved flame-retardant product – Tis- lamid 30D03 F01 K02 K06 R02 – is an example for an ion battery application in EVs. The company offers a wide range of FR plastics
that deliver the required electrical performance – Comparative Tracking Index (CTI), dielectric strength and a Relative Temperature Index (RTI). It has developed a new generation of FR compounds based on PA 66. Tislamid B 30D03 F01 Y01 HS R01 is a FR PA 66 with 30% glass fibre which is used in battery packs and drive assistant sensors. Tisan says it shows “excellent” mechanical strength, offers flame resistance classified as UL94 V0 up to 0.8 mm, and also maximum glow wire performance at 960°C. In addition to PA materials, Tisan produces PBT
materials for automotive parts used in very harsh environments where compounds need to have resistance to those environments. Its Tisester PBT compounds have low water absorption rates and possess the characteristic of maintaining insulation properties even in harsh environments, so they are used in many high voltage parts. To meet market needs such as these, Tisan developed Tisester PBT F 30D03 F01 K02 HS R01 (FR PBT, 30% glass fibre, heat-stabilised) which is used in thermal manage- ment systems and electric motor parts.
Avient has launched two new materials based
on polyketone that can deliver comparable perfor- mance and lower production-related CO2
levels
than PA 66, PA 6 and acetal (POM), it says. Devel- oped in response to current PA supply constraints, the company says that the new Edgetek PKE and LubriOne PKE series provide performance similar to PA 66 and PA 6. The speciality formulations com- bine good chemical and hydrolysis resistance to meet the challenges of harsh applications, such as those found in chemical, fuel contact or high-mois- ture environments. The new materials also offer sustainability benefits over the product lifecycle through carbon footprint reductions compared to competitive materials. Avient says polyketone base resin production emits up to 61% less CO2
than PA
and POM. Additionally, the new grades are formal- dehyde-free, addressing VOC concerns in manufac- turing compared to POM. The Edgetek PKE series includes short glass-
reinforced formulations with 10-40% short glass fibre. These materials provide good chemical resistance and dimensional stability, low moisture uptake, and high impact and wear resistance. The reinforced grades are targeted at applications in the industrial, electronics and transportation markets like electrical battery components and under-the-hood components in contact with fuel or chemicals. Lanxess has developed the Pocan XHR (Xtreme
Hydrolysis-Resistant) range of PBT materials offering good resistance to hydrolytic degradation in hot and humid conditions. In internal testing with standardised test specimens based on the strin- gent SAE/USCAR2 Rev. 6 long-term hydrolysis tests of the US Society of Automotive Engineers (SAE), the compounds reached Class 4 or Class 5 – the top two ratings. The company adds that many electrical and
electronic devices are exposed to ever-higher thermal loads for reasons including confined installation spaces or elevated operating tempera- tures. When used in dry environments, the plastics for these devices need to be able to withstand long periods in hot air. The impact strength of most product types in the Pocan XHR series remain virtually unchanged even after 3,000 hours of being stored in air at 150°C. This makes the compounds ideal for parts in engine compartments, such as connectors, or for power electronics components. The compounds are also ideal for overmoulding
Avient has launched two new materials based on polyketone that it says can deliver comparable performance and lower production-related CO2 levels than PA 66, PA 6 and acetal for use in under-the-hood applications
32 INJECTION WORLD | May 2021
of metal parts, says Lanxess. Rapid and extreme changes in temperature often cause stress cracks in components with overmoulded metal areas because of the differences between metal and plastic in terms
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IMAGE: AVIENT
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