TECHNOLOGY | 3D PRINT COMPOUNDS


Right: Infinam PEEK 9359 F is a new 3D printable


filament based on PEEK from Evonik


Thinking big Bioplastics producer Natureworks has long held a foothold in the 3D print space, where its PLA-based Ingeo polymers have proven to run well on fila- ment-type production systems. The latest addition to its offering is Ingeo 3D700, an amorphous grade formulated for large-format 3D print applications where the company says high rates of polymer deposition can result in excessive warpage with materials such as ABS or signifi- cant shrinkage with polyolefins or “general-purpose“ PLA grades. “As the 3D printing space


expands into larger, more complex applications, we are seeing an increased need for printing materials that are tailored for a specific applica- tion or process,” says Dan Sawyer, Business Development Leader for NatureWorks. “With significant growth in large-format additive manufacturing for industrial applications, we saw the opportunity to develop a new Ingeo biopolymer grade specifically de- signed to minimise the loss of time and material due to failures in large format prints.” Part warpage in large parts is typically controlled by using compounds containing mineral fillers or glass, carbon, or cellulosic fibre reinforcement, which can make processing more challenging. Natureworks says that because the Ingeo 3D700 resin has been designed for low shrinkage, it is possible to use less reinforcing content and still achieve quality large-format parts. In trials carried out by extruder and large-format printer component maker Dyze Design, Ingeo 3D700 showed significant shrinkage and through- put improvements over Ingeo 3D850, an existing Natureworks 3D print grade. “Our tests showed


IMAGE:


NATUREWORKS/ DYZE DESIGN


that a large-format part printed using Ingeo 3D850 demonstrated a shrink rate of 1.25%. In compari- son, the same part printed with Ingeo 3D700 had a shrink rate of less than 0.25%,” said Dyze CTO Philippe Carrier. “Because Ingeo 3D700 also has a higher throughput rate, we were able to success- fully print at the lower temperature of 190°C without seeing shrinkage or warping in the part.” Natureworks says Ingeo 3D700 is available for use as pellets for direct resin-to-print processes or as filament for the FFF process in the US, Asia, and Europe. The latest additive manufac- turing development from Evonik is a 3D printable filament based on PEEK. This high-temperature and chemical-


resistant ready-to-use material is said to be particularly well suited for additive manufacturing of demanding industrial plastic parts due to the high-performance polymer’s suitability for processing in common


extrusion-based 3D printing technologies such as fused filament fabrication (FFF) or fused deposition modelling (FDM). Evonik has launched the new filament under the Infinam PEEK 9359 F name. The natural-coloured PEEK filament, which has a diameter of 1.75mm, is wound on 500g spools suitable for direct use in standard FFF/FDM 3D printers for PEEK materials. Its properties include high mechanical strength, hydrolysis resistance and inherent flame retardan- cy. The company adds that it is well suited to production of lightweight and high-performance 3D parts for the aerospace, automotive, and the oil and gas industries. Compared to stainless steel, 3D parts made of Infinam PEEK 9359 F are said to be approximately 80% lighter and 30% tougher. They also offer very good fatigue resistance and this combination of properties makes the compound a good option for metal replacement in demanding lightweight applications. The new resin also offers good wear resistance and low sliding friction and can with-


stand long term exposure to temperatures of 250℃ or short term exposure to temperatures of more than 300℃.


Images show the difference in side wall warpage in the same part produced in black PP (left) and Ingeo 3D700 (right) from Natureworks


50 COMPOUNDING WORLD | May 2021


Flexible option Together with HP, Evonik has developed a 3D- printable thermoplastic elastomer for the latter’s Multi Jet Fusion technology. The elastomer is a flexible high-performance speciality powder based


www.compoundingworld.com


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