MATERIALS | HIGH TEMPERATURE PLASTICS
Above and right: DuPont’s Zytel HTNFR42G30NH and Zytel Plus 95 G35DH1 polyamide are well suited for use in a variety of connectors
automotive and consumer electronics. Automotive engines have been
relying on HTPs for a while now. RTP’s Weishalla says that although electric drives change the types of parts that are required, the demand for high temperature resistant thermoplastics remains high, particularly for electric motors, battery systems, and mating connectors.
Hot and cold Sun Chemical Advanced Materials (part of the Japanese DIC Corporation), recently commercial- ised DIC.PPS FZ-2140-T3 Black, a PPS that it claims is the new benchmark material to replace metal in heating and cooling applications. FZ-2140-T3 Black is optimised for automotive coolant applications, including thermal management modules (TMMs) and non-automotive applications, such as boilers and home heating systems. “In the coming years, TMMs will be the biggest injection moulded PPS application worldwide, providing increased fuel efficiency and lower
emissions,” the company says. It notes that TMMs and other demanding heating and coolant applications require excellent resistance to automotive coolants; high mechanical strength, especially knit line strength; outstanding dimen- sional stability and low water absorption; high creep and fatigue resistance; and good weldability leading to high strength in welded joints. “To achieve and surpass these
requirements, the new 40% glass fibre, linear high-molecular-weight DIC.PPS FZ-2140-T3 Black grade exhibits over 85% retention of tensile strength and tensile knit line strength after 3,000 hours in coolant at 135°C, 200 MPa tensile
strength and 80 MPa tensile knit line strength at ambient temperature, and outstanding high strength in welded joints, shown by 71 MPa tensile strength in infrared welded plates.” At K2019, Polyplastics will also show the
latest developments in its Durafide PPS. It says that for electric vehicle applications, it has developed new grades targeted for engine peripheral parts such as power control units (PCUs), to deliver high insulating properties, lower water absorption, and meet harsh operating conditions (-40°C to 150°C, up to 95% relative humidity). Because of their chemical resistance and their ability to be moulded into complex parts with tight tolerances, PPS materials can be a good choice for consolidating parts in systems that operate high temperature environments, RTP’s Weishalla notes. His company recently formulated a new PPS compound with the
High-heat polycarbonate for syringes
Covestro highlights the use of its Apec high-temperature polycarbonate in medical syringes. It says the market for prefilled syringes is currently experiencing strong growth – for example, in systems for the treatment of chronic diseases such as rheumatism. “The design of such injection systems is primarily concerned with ease of use to ensure that the patient is reliably supplied with the intended dose of the active substance,” says the company. The adapter for later screwing in the needle and the syringe cap plays a key role here. With its Gx TELC (Tamper Evident Luerlock Closure), Gerresheimer is
44 INJECTION WORLD | September 2019
offering an integrated solution which combines both functions in a single component and also enables tamper- evident protection of the active ingredi- ent. The medical technology specialist chose Apec 1745 as the material for the adapter. The transparent adaptor can be sterilised using conventional methods such as gamma rays or ethylene oxide. “In addition, it is dimensionally stable and dimensionally accurate at high tempera- tures, so that the entire component does not warp after hot steam sterilisation at 143°C, for example,” says Dr Wenzel Novak, Global Senior Director Business Development at Gerresheimer.
Right: The adapter of Gerresheimer’s Gx syringes for screwing in the needle and the syringe cap is made from high-temperature Apec 1745 polycarbonate from Covestro
www.injectionworld.com
PHOTO: DUPONT
PHOTO: GERRESHEIMER
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