MATERIALS | HIGH TEMPERATURE PLASTICS
Right: SABIC’s new Konduit 8TF36E LNP compound can be used for the adaptor and latch parts of burn-in test sockets
service life at lower temperatures. HT6 also offers the high flow rates required for thin-walled compo- nent designs.
Electronic focus Optoelectronics is another area that often necessitates the use of HTPs. At the 2023 Optical Fiber Communications Confer- ence which took place in California earlier this year, SABIC highlighted several specialised, high-heat thermoplastics that it says can simplify adoption of cutting-edge optical technologies. These included its recently launched Extem RH1016UCL resin, a thermoplastic PI said to be well suited for injection moulding lenses used in co-packaged optical transceivers, and Ultem 3310TD, a PEI with low thermal expansion targeted at lenses for single mode optical transceivers. Extem RH1016UCL can withstand the 260°C
peak temperature of PCB reflow soldering while maintaining the dimensional stability required for production of complex, miniaturised lenses and arrays. Aside from high temperature resistance, both Extem RH1016UCL and Ultem 3310TD provide near-infrared transparency, dimensional stability and high-volume processing capabilities. Launched late last year, LNP Konduit 8TF36E is another new specialty material pitched at the electronics industry, in this case addressing the stringent demands of burn-in test sockets (BiTS) used to stress-test double-data-rate (DDR) memory integrated circuits (ICs). As the number of pins and the testing temperature for DDR ICs increase and their dimensions shrink, demands on materials intensifies. This new compound provides the high flow required to facilitate complex, miniaturised BiTS designs, good dimensional stability and high temperature resistance, as well as offering thermal conductivity of up to 4.5W/m.k to rapidly dissipate heat. Trials have shown that testing process, Konduit 8TF36E withstood typical temperatures of up to 150°C (It is claimed the compound can handle temperatures up to 260°C) while maintaining good dimensional stability. SABIC says this good high temperature performance could potentially allow BiTS to be re-used repeatedly without degrading. “Advancements in memory chips are placing new demands on burn-in test sockets,” said Jenny Wang, Director, Formulation and Application, for the Asia Pacific region at SABIC. “As the power of
42 COMPOUNDING WORLD | August 2023
DDR ICs increases, temperature control is critical to verify that all devices in a BiTS system are uniformly stressed during reliability testing. LNP Konduit achieves what incumbent materials cannot. Not only does it provide high thermal conductivity, but it also delivers other key
properties that contribute to successful testing.” While some doubt its viability, many see
production of ‘green’ hydrogen playing a role in the shift to renewable energy supply. Polymers could play a key role in the production of the electrolysers needed to produce hydrogen and fuel cells used to convert it to electrical power. Both require high polymers that offer good chemical, thermal and mechanical resistance (parts are likely to be exposed to aggressive media such as deionised water or cooling agents like water- glycol mixtures). Germany-headquartered Mocom has devel- oped several glass fibre-reinforced Tedur PPS compounds with high chemical resistance, thermal and mechanical stability, as well as low ion leakage over long operating times, especially for this application area. The company’s Tedur L PPS FT 2030 SB1171-22
and Tedur L PPS FT 2040 SB1152-22 formulations are said to provide low creep at increased tem- peratures, chemical resistance and very good stability against ion leakage in deionised water at 70°C to 80°C, making them suitable for use in port splitters or stack end plates of fuel cells. Mocom says the two new Tedur PPS grades could also find application in closed systems, such as the cooling cycle of fuel cells. These are de- signed for long term operation at up to 135°C and are considered ‘closed’ if the coolant circulates in a sealed loop and is not constantly replaced.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.rtpcompany.com �
www.eurotec-ep.com �
www.ascendmaterials.com �
www.solvay.com �
www.genestar.kuraray.com �
www.celanese.com �
www.lati.com �
www.emsgrivory.com �
www.sabic.com/en �
www.mocom.eu
www.compoundingworld.com
IMAGE: SABIC
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