ADDITIVES | ELECTRICALLY CONDUCTIVE
Adeka ESD additives target 3Dprinting
Japanese additives producer Adeka has developed a nonionic-polymer based electrically conductive modifier for use with thermoplastic filaments used in material extrusion, or fused filament, 3D printing systems. The company says that the pellet-form 3D-AS01 additive is specially designed for use in extruded filaments used for production of parts requiring ESD (elec- tro-static discharge) protection. It says the additive can reduce the surface resistivity of ABS resin to below 1011
ohms/sq at a
10% loading, which it claims out performs current nonionic-polymers such as PEBA
(polyether block amide). The additive can be used with a variety
of polymer compounds, including ABS and PC/ABS alloys. Unlike carbon nanotubes (CNTs) the polymer additive does not change the colour of base resin signifi- cantly, making colouring of the filaments possi- ble. The company sees opportunities for the new modifier in applications such as electronic carrier trays. �
www.adeka.co.jp
provide the high shielding performance needed. “We can achieve 20 to 60 dB attenuation in the
most frequently used frequencies for e-mobility and other industrial applications, such as measur- ing devices (gas pressure sensors, for example),” says Van Bellingen. Another growing area of opportunity she identifies is in batteries and fuel cells, where highly conductive plastics are used for parts such as bipolar plates. To meet the growing demand for recycled
content, Witcom can incorporate recycled carbon fibres (rCF) in conductive compounds, which can be formulated based on either recycled or virgin polymers. “The feeding of this additive is the most critical step but we can overcome this and produce, for instance, well-performing recycled PA compounds with 30% rCF, helping the auto- motive industry to reach its target of using minimum 25% recycled material by 2025,” she says. Availability of rCF is better than in the past, she adds.
An antistatic electronics tray produced by fused filament 3D printing using Adeka’s 3D-AS01 additive
New PP-based compounds from Finnish company Premix include a conductive grade (PP 19161) and a dissipative version (PP 19136), which the company reports is useful for injection mould- ed crates and technical parts. A concentrate (PP 19279) is also available that contains a high loading of carbon black for dilution with either virgin or recycled PP. This is intended for produc- tion of corrugated boards, sheets, and profiles. Beyond PP, the company has also developed a new electrically conductive grade — Pre-Elec PA17970 — based on polyamide 6 with 25% glass fibre to provide enhanced mechanical properties. This material grade offers low warpage and good thermal properties. Conductivity is achieved through the use of a special conductive carbon black. The company says it is useful for the production of plastic automotive parts that need to be electrostatically painted. Premix announced last year it is to build its first plant outside of Finland in Gaston County in the US state of North Carolina. The decision last year followed the award of an $80m contract from the US Department of Defense, working with the Department of Health and Human Services, to make electrically conductive plastic for production of pipette tips for diagnostic testing. The company aims to start operation in 2025.
Left: This tray for semiconductor manufacturing is produced in a conductive PPS compound from LehVoss
20 COMPOUNDING WORLD | February 2023
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.cabotcorp.com �
www.orioncarbons.com �
www.bekaert.com �
www.lehvoss.de/en �
https://wittenburggroup.com/witcom/ �
www.premixgroup.com
www.compoundingworld.com
IMAGE: ADEKA
IMAGE: LEHVOSS
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