ADDITIVES | POLYAMIDES
Long term service temperature versus cost for Creamid 240 high heat resistant PA66 compared to alternatives Source: Teknor Apex
and drinking water. In automotive, for example, Mann+Hummel manufactures a cool-water valve for Hyundai-KIA-Motors in Grivory HT1VA-35 HYS. This application requires good hydrolysis resist- ance at elevated temperatures, resistance to cooling system chemicals, and high dimensional stability. The Grivory HT1VA-35 HYS also offers good demoulding performance, so tooling with complex geometries and undercuts can be used. FWA products are approved for use in direct contact with foodstuffs and drinking water in a variety of applications and consumer goods. Two grades are available: Grivory HT1VA-4 FWA (40 wt.% glass fibres) and Grivory HT1VA-5 FWA (50 wt.% glass fibres). In comparison to conventional Grivory HT1V-FWA grades approved for use in direct contact with foodstuffs and drinking water, these two products provide significantly higher toughness and reliability and extend utilisation limits with regard to temperature and life expectancy.
Optimising cost A new series of high-heat glass-reinforced PA66 compounds from Teknor Apex Company is claimed to bridge the cost-performance gap between standard heat-resistant polyamides and costly speciality polymers, providing a more economical alternative for automotive and other metal-replacement parts. The company says the Creamid 240 H7.5 Series compounds provide the strength and stiffness of highly glass filled engineering polymers, while maintaining critical mechanical properties even after continuous service at temperatures of 240°C. Currently available grades come with glass fibre contents of 35, 50, or 60% and are said to display better property retention than standard PA66 compounds with a similar level of glass fibre reinforcement.
48 COMPOUNDING WORLD | February 2019
Teknor Apex says the materials offer consider- able cost saving potential. Per kilogram cost is said to be around 30% less than high-performance polymers such as polyphthalamide (PPA) or PA46 while providing comparable performance. “Addi- tional cost savings with Creamid 240 H7.5 com- pounds are achievable in processing,” says Dr Hartmut Elsässer, Global Director of Technology for Engineering Thermoplastics at Teknor-Apex. “These new materials exhibit lower melt and mould temperatures than competing PA66 compounds and high-performance products like PPA, providing economies in terms of energy consumption, cycle times and tooling requirements.” The new compounds have processing tempera-
tures in the range of 280-300°C and mould temperatures of 80-110°C, while the correspond- ing ranges for PPA or PA4.6 are 330-350°C and 130-150°C. Teknor Apex recommends Creamid 240 H7.5 compounds for automotive under-hood components such as charge air cooler end caps, air intake manifolds, quick-fit connectors, radiator end tanks, turbo air ducts and resonators, oil pump wheels, EGR valves, and thermostatic casings. Other possibilities include electronic connectors, diode carriers, and bobbins, as well as consumer products such as lamp sockets and connectors. “While metal-replacement continues to drive demand for polyamides in the automotive market, performance-boosting technologies such as turbocharged engines and advanced transmission systems place stricter requirements for heat resistance, chemical resistance, and reduced water absorption,” says Markus Krippner, Director of Sales and Marketing. “These forces, along with the overriding industry effort to reduce vehicle weight, are driving Teknor Apex investment into new polyamide technologies.” Lightweighting requires materials that provide
high strength, low levels of creep, and excellent processability to fill complex and often heavily- ribbed designs. Krippner says Creamid 240 H7.5 meets these demands.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.quarzwerke.com �
www.lehvoss.de �
www.clariant.com �
www.evonik.com �
www.imerys-performance-additives.com �
www.akro-plastic.com �
www.ascendmaterials.com �
www.basf.com �
www.emsgrivory.com �
www.teknorapex.com
www.compoundingworld.com
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