HIGH TEMPERATURE THERMOPLASTICS | MATERIALS
Company. “But the cool thing about compounding is that we can provide a range of properties in one material, which is very helpful to moulders and product designers.” The company reports growth in HTP materials containing recyclate. “We’ve seen higher demand for sustainable options,” says Weishalla. “Our high temperature product portfolio continues to expand with more options containing recycled content.” Tecomid NA40 GR30 NL HT A, produced by
Turkish company Eurotec, has been specifically formulated for engine component applications exposed to high heat. It is a 30% glass fibre reinforced PA66 formulated for use in air intake systems, chassis parts, gearshift housings or fuel supply systems. For temperatures exceeding 180°C, the com-
pany offers a range of high-performance plastics such as PPA, PPS, PEEK and PESU, which are included in the product line under the brand names Tecomid HT, Tecotron XS, Tecopeek PK and Tecotek ES, respectively. PPA, PPS and PEEK, are generally used in ignition systems and sensors, as well as in sockets and coils within electronic systems. The ability to retain their mechanical properties and dimensional stability at elevated temperatures is vital to applica- tions that require high continuous use temperature (CUT) levels. Retention of electrical properties for extended periods is another key factor. Buket Turan, Technical Marketing Manager at
Eurotec, says: “PPA- and PPS-based materials are often preferred in the automotive industry, where our Tecomid HT and Tecotron can provide CUT up to 180°C and 210°C. Tecomid HT NT40 GD40 BK009 XA61 (PPA, 40% glass fibre reinforced, flame retardant and heat stabilised) grade is being currently used by a well-known automotive OEM for an inverter housing application where standard PBT and PET materials cannot provide the required CUT. Tecomid HT NT40 GR50 BK009 HS (PPA, 50% glass fibre reinforced, heat stabilised, black) and Tecomid HT NT40 GR30 NL HS (PPA, 30% glass fibre reinforced, heat stabilised, natural) have been designed for use in gear lever and high-heat lamp socket applications, respectively. “In EV motors, parts are expected to maintain
their properties at elevated temperatures,” Turan continues. “Tecotron XS20 KK65 BK009 0B (PPS, 65% glass fibre/mineral reinforced, black), Tecotron XS20 GR40 BK009 (PPS, 40% glass fibre reinforced, black), Tecomid NT40 GR30 BK009 XA60 (PPA, 30% glass fibre reinforced, flame retardant and heat stabilised) can be used for brush holder parts thanks to their thermal resistant properties. For
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Temperature performance of Ascend’s Starflam X-Protect FR PA66. Source: Ascend Performance Materials
rotor and endcap applications that require dimen- sional stability or electrical insulation, PESU-based materials such as Tecotek ES20 GR30 NL (PESU, 30% glass fibre reinforced, natural) and Tecotek ES20 GR20 NL (PESU, 20% glass fibre reinforced, natural) are preferred.” As EV manufacturers develop higher-voltage systems operating at 800V or above, new regula- tions call for battery components to withstand temperatures up to 1,000°C over extended escape times. Many incumbent high-heat thermoplastics are no longer capable of ensuring the required thermal stability and integrity for parts operating under these demanding conditions. Ascend Performance Materials’ Starflam
X-Protect, a proprietary flame retardant PA66 that helps automotive engineers advance both safety and performance, is crucial in managing thermal runaway conditions, says the company. Typical applications include modules, barriers, high-volt- age insulators, structural elements, vents and pressure relief valves. Ascend says, when moulded in Starflam X-Pro-
tect, these parts offer extreme heat resistance well beyond that of conventional flame-retardant engineering thermoplastics and it provides mechanical stability at temperatures far above the melting point of a standard PA66. It is available in unfilled, 30% glass and 60% glass/mineral filled grades, all with a glow wire flammability index (GWFI) temperature of 960°C as well as a UL94 V-0 rating at 0.8 mm wall thickness. The glass-filled version has an R22:HL3 rating for interior compo- nents, according to European railway safety standard EN 45545.
� April 2023 | INJECTION WORLD 47
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