AUTOMOTIVE | UNDER THE HOOD
(RV500HHR 3800 BK). Typical applications for these materials are air suction system components requiring considerable heat resistance. The company also offers solutions using PA6.12
Above: Hexpol TPE has developed materials for adhesion to polyketone substrates during multi- component injection moulding
toughened grades and other speciality com- pounds. Creamid P Series compounds can further employ an advanced heat stabilisation system that extends continuous use temperature. At K2019 the company introduced the first two
Creamid P compounds with 30% and 50% glass fibre content. Dry as moulded, these compounds exhibit about 80% reduction in water uptake after 24 hours as compared to standard PA6, and about 30% lower upon saturation. In the conditioned state these new grades, Creamid P2H7G6 and Creamid P3H2G10, exhibit higher tensile elastic modulus and strength at break (see Figure 1, p24). “The improved tensile properties of Creamid P compounds enable them to meet the demands of certain structural applications where, traditionally, PA6 compounds did not perform due to high moisture uptake,” says Markus Krippner, Director of New Business Development ETP. “In some cases they may provide a practical alternative to PA66 compounds as well.” In spiral flow tests, the new compounds exhibit higher flow than comparable grades of standard PA6 yet similar levels of mould shrinkage, enabling them to be processed with existing equipment and tooling. The RadiciGroup High Performance Polymers
Business Area has introduced Radilon NeXTreme, a polyamide capable of withstanding long-term exposure to high temperatures. “Radilon NeXTreme was initially developed for automotive applications, for which it is well suited as it features exceptional heat ageing resistance in air at 230°C,” says Erico Spini, Global Marketing Manager. “After that, we developed a grade on the same polymer base for extrusion of technical filaments for industrial applications under very severe use conditions.” Two grades of Radilon NeXTreme are offered for the automotive sector: 35% glass fibre reinforced (RV350HHR 3800 BK) and 50% glass fibre filled
26 INJECTION WORLD | May 2020
(Radilon DT) and PA6.10 (Radilon D) as replacements for PA12. This choice is dictated by the need to have materials capable of withstanding higher continuous use temperatures for some automotive segments than the traditional PA12 can handle. At K2019, RadiciGroup HPP introduced new materials specifically developed for air ducts, cooling system ducts, TOC and SCR hoses, and fuel line tubes, which are capable of passing tests in air and gasoline at continuous use temperatures of up to 120-130°C. SABIC has launched Xenoy HTX resin, a polyester-based, high-heat technology that can enable the production of light, impact resistant and high performing structural automotive applications. The company says that Xenoy HTX resin is especially relevant for today’s automakers, who need new polymer solutions for the production of structural components capable of withstanding higher temperatures, including those of e-coating lines operating above 180°C. Relevant applications include body-in-white components, structural reinforcements and battery protection systems for electric vehicles. Xenoy HTX resin is available in unfilled and glass-filled grades and offers significant weight savings compared to steel and aluminium. The new family of thermoplastic materials from SABIC also provides a drop-in alternative for PA66 compounds and alloys, which have had supply shortages and price fluctuations. The first products of this new high-heat resin technology were introduced at K2019 and include unfilled Xenoy HTX 950, as well as two glass fibre reinforced grades, Xenoy HTX 975 and Xenoy HTX 575. The unfilled resin is modified to absorb significant energy and withstand plastic deforma- tion in the event of a crash. SABIC is targeting the material for use as a lightweight metal replacement solution in new safety applications, including side rockers designed to offer protection for battery modules mounted to the floor of electric vehicles. Hybrid honeycomb designs with Xenoy HTX can potentially save up to 60% of the weight normally associated with traditional all-metal based, multi- piece steel or extruded aluminium crash counter- measures, without compromising on dimensional stability, rigidity and mechanical strength. The glass-filled grades are particularly suitable for demanding body-in-white structures that must be capable of enduring e-coating cycles of 30 minutes at temperatures of 180-220°C. The grade can also be used to produce other structural parts subject-
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IMAGE: HEXPOL TPE
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