MEDICAL | MATERIALS
The growing trend of miniaturisation in healthcare devices is impacting how products are designed. On-body drug delivery or monitoring applications call for lightweight designs to improve patient comfort and overall compliance; small devices are also often used in surgery to advance patient recovery times. These require materials with flow properties suitable for thin-wall applications. Makrolon Rx2235 polycarbonate from Covestro is one of the latest materials to fulfil these needs. Pierre Moulinié, Global Healthcare Technology Lead,
Polycarbonates, at Covestro says Makrolon Rx2235 polycarbonate “sets a new benchmark for flow length.” The material is biocompatible according to ISO 10993-1 test requirements and designed to be sterilised using gamma or e-beam methods. Covestro says the spiral flow testing shown in the picture demonstrates the increased flow length that can be achieved using Makrolon Rx2235 polycarbonate.
friction solutions for medical devices, this time from its LNP product line. It notes that for a medical device, whether it be a drug delivery pen or a laparoscopic surgical tool, repeatable and efficient motion is critical to performance. The friction between moving parts plays a large role in how a device is perceived and accepted by both consum- ers and healthcare professionals. “Lubricomp and Lubriloy compounds can help deliver the perfor- mance required,” the company says. Demands on wear and friction materials for medical devices are growing as sterilisation and cleaning techniques evolve, parts get smaller and thinner, and market trends move towards more consumer-friendly styling and colours, says SABIC. “Add the heightened emphasis on system cost optimisation and the need for innovative internally lubricated thermoplastic solutions expands.” The addition of an internal lubricant to a thermoplastic material can reduce the coefficient of friction between two plastic parts, allowing them to slide past each other smoothly with minimal wear. Traditional lubricants like medical grade silicone and PTFE can be combined with advanced PC copolymer technology to deliver the required performance in thin wall parts. Typical applications include surgical stapler
internals, laparoscopic surgical tool internals, trocar latches, insulin pen dials, screw, and sleeve, inhaler dose counter buttons, and fluid coupling quick disconnects Solvay recently announced that the high
stiffness, strength, gamma sterilisation resistance and biocompatibility of its Ixef polyarylamide (PARA) resin helped enable a new single-use instrument kit for anterior cervical fusion proce- dures. Developed by Intelligent Implant Systems, a
www.injectionworld.com
medical device company specialising in solutions for spinal surgery, the Mediant Anterior Cervical Plating System leverages Solvay’s advanced polymer to help boost operating room efficiency, eliminate onsite sterile processing and reduce infection risk. “The primary benefit of Solvay’s Ixef PARA in this
application is its metal-like strength, which gives our single-use surgical instruments a very high level of performance without incurring the costs associated with machining metal and repeated steam sterilisation,” says Marc Richelsoph, presi- dent and CEO of Intelligent Implant Systems. “Although PEI also offered viable options for our surgical tool kit, we specified Ixef GS-1022 PARA because its superior stiffness and mouldability was essential for the kit’s instruments.” Ixef GS-1022 PARA also provides an attractive surface finish. The material is available in a range of gamma-stabilisable colours. The polymer has been evaluated for ISO 10993 limited duration biocom- patibility and is supported by an FDA Master Access File.
CLICK ON THE LINKS FOR MORE INFORMATION: �
www.borealisgroup.com �
www.premixgroup.com �
www.albis.com �
www.hexpoltpe.com �
www.trinseo.com �
www.kraiburg-tpe.com �
www.gerresheimer.com �
www.celanese.com �
www.polyplastics.com �
www.sabic.com �
www.solvay.com �
www.covestro.com
March 2019 | INJECTION WORLD 23
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