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Biomedical Polymers and Compounds™

Foster Corporation To Present Technical Papers AT NPE 2018 SHOW

PUTNAM, CT, USA - (May 5, 2018) - Foster Corporation, a leader in polymer solutions for healthcare markets, is pleased to announce that Timothy Largier, PhD., Foster’s thermoplastic compound development chemist, will present two technical papers at the NPE 2018 Show in Orlando, Florida (May 7-11). “In the first presentation,” said Larry Johnson, Executive Vice President for Foster Corporation, “He will speak about Foster’s PureEase™ processing additive and Foster’s Combat™ antimicrobial concentrate that can be used in bi-layer extrusion to produce low-cost antimicrobial catheters. The second presentation will focus on how engineering compatibilized alloys of medical polyamides is an effective method for increasing catheter strength without compromising robustness or translucency.”

Doctor Largier will present his first paper “Antimicrobial Bi-Layer Catheters - Extrusion and Performance” at the Show’s Materials and Processing for Medical Applications Session on May 8th at 5:00 pm in room T15/S320B.  His second presentation “Nylon 12/PMMA/SAN Alloys for Translucent Medical Catheters” will be at the Morphology, Compatibilization and Performance of Polymer Blends Session on May 9th at 10:00 am in room S320D.

The following is a brief overview of the presentations: 

Antimicrobial Bi-Layer Catheters — Extrusion and Performance”

For this study, bi-layer antimicrobial catheters were extruded with inner and outer layers of biocompatible thermoplastic polyurethanes (TPU). The inner layer of low durometer was compounded with Foster’s PureEaseTM processing additive, and the harder outer tube with Foster’s CombatTM antimicrobial concentrate. The antimicrobial additive concentration, outer layer tube thickness, and processing thermal history were also considered. Results showed that the antimicrobial bi-layer catheters were highly effective at inhibiting cell division resulting in a 5 log reduction of organisms for CRE (carbapenem-resistant K. pneumonia), and 3 log reduction for MRSA (methicillin-resistant S. aureus us aureus bacteria). The thickness of the outer tube did not influence the catheters antimicrobial effectiveness. It was concluded that bi-layer extrusion is a viable method for obtaining highly efficient, low-cost antimicrobial catheters.


Nylon 12/PMMA/SAN Alloys for Translucent Medical Catheters”

In this study a nylon 12/polymethyl-methacrylate (PMMA) / styrene acrylonitrile (SAN) alloy was compatibilized with styrene maleic anhydride (SMA) to strengthen the material. The results showed the presence of a compatibilizer significantly increased yield properties implying improved miscibility between phases. Flexural modulus was also shown to increase from the base resin by up to 100%.  The alloying composition was then optimized to maintain translucency. Tubing samples that were produced as prototype catheters are robust, translucent, and flexible.


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