Plastics Technology

DEC 2018

Plastics Technology - Dedicated to improving Plastics Processing.

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Page 47 of 59

High-Heat, Reinforced Nylon 66 Bridges Cost-Performance Gap A new series of high-heat, glass-reinforced nylon 66 compounds is said to bridge the cost-performance gap between standard heat-resistant nylons and costly specialty polymers, providing injection molders with a more economical alternative for automotive and other metal- replacement parts. The Creamid 240 H7.5 Series from Teknor Apex Co. was launched at the recent Fakuma 2018 show in Germany. These compounds reportedly boast strength and stiffness comparable to highly glass-filled engineering polymers while maintaining high levels of critical mechanical properties even after continuous service at temperatures of 240 C/464 F. Currently available grades with glass content of 35, 50, or 60% exhibit dramatically improved property retention over similar standard nylon 66 compounds. At the same time, they cost around 30% less than high-performance polymers such as polyphthalamide (PPA) or nylon 46, while providing comparable performance. According to Teknor Apex, additional cost savings with Creamid 240 H7.5 compounds are achievable in processing. These new materials exhibit lower melt and mold temperatures than competing nylon 66 compounds and high-performance materials like PPA, providing economies in terms of energy consumption, cycle times, and tooling requirements. The new compounds have processing temperatures in the range of 280-300 C/536-572 F and mold temperatures of 80-110 C/176-230 F. MATERIALS COMPOUNDING MATERIALS MATERIALS Nylon 66 for Automotive Lightweighting A new glass-reinforced nylon 66 with improved energy absorption is said to outperform similar materials, reducing noise, vibration and harsh- ness (NVH), and absorbing impact energy from crashes. Launched by Ascend Performance Materials at the recent Fakuma 2018 show in Germany, Vydyne R433H is designed to reinforce downgauged steel and aluminum used to reduce vehicle weight. In electric vehicles, where lightweighting and NVH reduction are especially important, R433H also reportedly works well in battery frames and housing. A new turnkey mixing and discharging system from Charles Ross & Son Co., Hauppauge, N.Y., can extrude finished product into strands. The Ross VersaMix Model VMC-1 (photo) and Discharge System Model DS-1 are mounted on a common bench and supplied with two vessels, one for mixing and one for extrusion. An air/oil hydraulic lift raises and lowers the mixing vessel to and from the operating position. At the end of the batching procedure, while the mixing vessel is in the raised position, finished product is transferred into the extrusion vessel positioned below the mix vessel. The extrusion can is then rolled over to the Discharge System where product is pushed out by a platen through a perforated die plate, forming strands in the desired profile. The VersaMix is a triple-shaft mixer with independently-driven low- and high-speed agitators. Capacities range from 1 to 1000 gal. The combination of low- and high-shear mixing accommodates a wide range of viscosities up to around 1 million cp. Designed for vacuum operation, the VMC-1 features a special charging tube for introducing minor ingredients sub-surface near the high-speed blades. Two high-speed shafts are each supplied with two saw-tooth type blades, doubling this model's standard shear input. 'Chemically-Compliant' ABS Compounds for Consumer Products A new line of ABS compounds under the brand Chemical Compliance (CC) for applications that include toys, cosmetic containers, and poducts that come in contact with food, was launched by Elix Polymers at the October Fakuma 2018 show in Germany. All components in Elix ABS CC compounds have been selected to be compliant with health-related regulations like EU10/2011 (Plastic Materials for Food Contact Applications). Extra services from Elix, like migration testing, development of compliant colors, additional quality controls for these compounds, or technical support during processing, are said to add an extra guarantee that best practices are followed to ensure there is no contamination or degradation of the compounds. Elix will also conduct product quality and safety tests based on OEM requirements. Grades have been formu- lated for individual applications, enabling customers to select materials based on their specific needs. Injection molding grades P2H-CC and P3H-CC are two of the many offerings that are available in the new CC line. These materials reportedly are easy to process and have a high level of brightness as well as intense colors. Single-dose coffee makers are an example of the type of application that Elix is aiming at with the CC grades. Triple-Shaft Mixer with Custom Discharge System 46 DECEMBER 2018 Plastics Technology Keeping Up W it h Technolog y

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