COMPOUNDS | THERMALLY CONDUCTIVE
Right: SABIC’s thermally
conductive LNP Konduit 8TF36E grade is suitable for use in DDR memory chip burn-in test sockets
Below: Passive EV battery and charging systems are a key potential market for thermally conductive plastics, according to Eurotec
power of DDR ICs increases, temperature control is critical to verify that all devices in a BiTS system are uniformly stressed during reliability testing,” according to Jenny Wang, Director, Formulation and Application, APAC at SABIC. The LNP Konduit 8TF36E compound provides very high flow to help enable the complex, miniaturised designs along with good dimensional stability and high temperature resistance (during the testing process the material has to withstand typical testing temperatures of 150°C). It also offers a thermal conductivity of up to 4.5 W/m.K to quickly dissipate heat after testing, Sabic says. The Timrex line of thermally conductive additives from Imerys Graphite & Carbon are manufactured from natural and synthetic graphite and include its high-aspect ratio Timrex C-Therm prod- uct, which can achieve thermal conductivity above 20 W/m.K in-plane and 4 W/m.K through-plane. The C-Therm product line can be used to boost the thermal conductivity of standard graphites or in combination with other conductive additives. Adding graphite-based products, which can vary in terms of morphology and particle size distribution, enables fine-tuning of the polymer compound’s thermal and electrical conductivity and mechanical properties, the company says. It adds that in most resin systems a 20% loading of a C-Therm com- pound is sufficient to achieve thermal conductivity of 1 W/m.K through-plane conductivity.
Battery options Turkish technical compounder Eurotec Engineering Plastics manufactures a range of technical polymers that provide thermal and electrical conductivity, together with high heat resistance, flame retardancy,
and impact resistance. It says, among other applica- tions, the materials can help increase battery performance in electric vehicles (EVs) by providing more effective cooling. “Thermal management is divided into two main
groups: active and passive cooling systems. Active cooling systems require coolant performances of the plastics while passive cooling systems include thermal conductive plastics as metal replacement. Thermally conductive plastics increase the performance of electric vehicles due to their lightness in weight compared to metals,” says Buket Turan, Technical Market- ing Manager at the company. Eurotec says that while metals have very high thermal conductivity levels, an actual thermally conductive range of 1-20 W/m·K is enough for the
cooling systems of much electronic equip-
ment. The advantages of thermally conductive polymers, it says, are improved operational costs, energy savings, design freedom and lightweight- ing of parts compared to metals used in critical applications. Eurotec materials are both thermally and electrically conductive or thermally conductive and electrically insulating. “In e-mobility applications, components become smaller, require more power and need to have an aesthetic aspect but at the same time with high thermal load. Thus, it is important to dissipate heat to enhance life time and reliable power for the battery,” says Turan. Eurotec says its thermally conductive Tecomid
NB30 NL TC 5C PA6, Tecomid NG30 NL TC 5C, and Tecomid NG30 GR10 NL TC 5C 10% glass fibre reinforced grades — all of which are natural in colour — are suitable for use as metal replacement options for housing components of electronic modules, covers of electric motor control housings, or components of EV charging systems. Two thermally and electrically conductive
grades — Tecomid NB30 BK111 TC 1C PA6 (black) and Tecomid NB30 GR15 BK111 1C TC PA6 15% glass-fibre reinforced PA6 grade (black) — offer 5 W/m·K and 8W/m·K in-plane thermal conductivity, respectively. They have been developed for LED heat sinks, miniaturised electronic parts, and housings for automotive headlight sensors. Celanese offers a range of thermally conductive
formulations, which it markets under the CoolPoly brand. These grades are based on either polyphe- nylene sulphide (PPS), Liquid Crystal Polymers (LCP), a variety of polyamides, or thermoplastic elastomer (TPE) materials. They trace their roots
20 COMPOUNDING WORLD | September 2023
www.compoundingworld.com
IMAGE: SHUTTERSTOCK
IMAGE: SABIC
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