products | Materials MEDICAL Radio-visible PEEK for implants
Solvay Specialty Polymers has added a radio-visible grade to its Zeniva family of polyethere- therketone (PEEK) resins for production of implantable medical devices. The new Zeniva ZA-520
grade uses an image contrast additive that makes it visible to X-ray, CT and MRI healthcare imaging systems. According to Solvay, this opens up opportu-
INFRASTRUCTURE BASF goes potable with Aqua brand
BASF has introduced the Aqua family of polymers, including PA, PBT and POM grades, that carry approval for use in drinking water applications from the key regulatory institutes in Germany, the UK
PROTOTYPING TPU extends rapid manufacturing options
Bayer MaterialScience teamed up with Fraunhofer institute spin-off Solid Composites to develop a thermoplastic polyurethane (TPU) powder suitable for use in selective laser sintering (SLS) additive layer building systems. The new powder material
will be marketed by Lehmann & Voss - which acquired the Solid Composites operation in July – under the Desmos- int name. One grade will be available initially – Desmos- int X 92 A-1. Bayer MaterialScience says SLS equipment users have in the past found their choice of
54 One of the benefits of the
new powder material is that the SLS build chamber need only be maintained at 80˚C; PA grades must be maintained at near the melting point of the polymer. This saves energy during the building process, says Hättig, and reduces thermal ageing of the non-
“The non-sintered powder does not age inside the processing space and therefore can be used for the next job, an enormous cost advantage compared to the classical laser sintering material PA12,” says Hättig. According to Dr Marcus
materials limited to either rigid polymers such as PA or soft elastomeric grades. “Our TPU products, with their high toughness, elasticity and strength, have now closed the
INJECTION WORLD | September 2012
gap between these material classes. And that opens the door to good application opportunities,” says Jürgen Hättig, TPU marketing specialist at Bayer MaterialScience.
Rechberger, who founded Solid Composites and now heads Desmosint activities within Lehmann & Voss, the material is likely to find application in production of short run parts such as orthopaedic show inlays, athletic shoes, helmets and prosthetics. ❙
www.lehvoss.de
www.injectionworld.com and France. Drinking water approval
procedures in Europe are determined at a national level. All of the new Aqua resins, which include products from BASF’s Ultramid PA, Ultradur
PBT, Ultraform POM and Ultrason polyaryl sulphone (PAS), meet the requirements of Germany’s DVGW, the UK’s WRAS and French ACS regimes for cold water. ❙
www.basf.de/ultras
nities in application areas, such as intervertebratal devices, where the need to image currently means using titanium or cobalt chrome metals. A key benefit of Zeniva over
metal is its modulus of elasticity, which provides a much closer match to that of bone. The resin also meets biocompatibility requirements, showing no cytotoxicity,
sensitisation, irritation or acute systemic toxicity in ISO 10993 testing, and is chemically inert. Zeniva is part of Solvay Speciality Polymers’ Solviva range of implantable plastics, which also includes Proniva self reinforcing polyphenylene, Veriva polyphenylsulphone and Eviva polysulphone. ❙
www.solvayspecialtypolymers.com
MEDICAL
Halogen- free fire retarded PC/ABS
Diamaloy ABSPC 754M is a new non-halogenated fire-retardant PC-ABS blend developed by US-based Network Polymers for applications such as housings for hand-held medical devices.
The ABSPC 754M grade is
unreinforced and is available in a range of standard colours or custom-coloured to the specific requirement. All colours carry a UL94 V-0 flame rating to 1.5mm and comply with ISO 10993-5 cytotoxity guidelines for medical devices. ❙
www.networkpolymers.com
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