3D PRINTING | INNOVATION
conductivity; opacity; and colour. This means that, for example, a part can have durable, hard surfaces with a low friction coefficient where contact and wear will occur, and different properties elsewhere to meet other functional requirements. HP says it is growing its portfolio of HP-branded powders, while its open platform model encour- ages third-party collaboration and materials expansion. “HP plans to continue expanding the palette of material offerings even further — deliver- ing a wider family of thermoplastics, including those with flame-retardant properties,” a represent- ative says. “And we’re exploring new materials, such as elastomers, polyamides, commodity plastics, and high-performance materials.”
New polyamides Evonik is a participant in HP’s open platform program. It is currently expanding its production capacities for PA powders used in Multi Jet Fusion and various sintering processes. A new production line in Marl, Germany, which went on stream early this year, increased capacity for Vestosint powders by 50%. The company says it is among the leading global
Left: Air duct component for an engine compartment 3D printed in Evonik’s Vestosint PA powder
suppliers of sintering powders for 3DP (it also offers PEEK powder for extra-high-temperature applica- tions). Sylvia Monsheimer, Director New 3D Printing Technologies, Evonik Resource Efficiency, says powder-based methods now established on the market (apart from HP’s) include not only the well-known SLS, in which a laser produces the component, but also selective heat sintering (SHS), which uses a thermal printhead instead of the laser. “A relatively new technique is high-speed sintering [HSS], in which the powder is printed with an
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