Like many medical-grade plastics introduced at this year's MD&M West, the products debuted by SABIC Innovative Plastics Division consist of an antimicrobial line. This trend is due to growing concern in hospitals to reduce infections in staff and patients, David Wildgoose, general manager, North America, for engineering resins, told us. The SABIC line of nine new antimicrobial compounds incorporate a variety of concentrations of silver for varying levels of pathogen reduction, and can be custom compounded to specific customer requirements. The nine grades are based on engineering plastic families already used in medical devices: LEXAN EXL copolymer, LEXAN polycarbonate (PC) resin, XENOY PC/polybutylene terephthalate resin, and polypropylene resins. Applications include medical equipment such as beds and tables, surgical instruments, and monitoring and imaging devices. (Source: SABIC)
Greg, I agree, and that's why I was pleasantly surprised to find how many medical-grade plastics manufacturers are addressing the sterilization issue, including materials that can withstand multiple types of sterilization chemicals and processes.
I'm thinking that what 3drob noted about things not being all that easy to wipe down is due to the increased desire for more pleasing surroundings. As they give the hospitals a more "homey" feel, they also by necessity make it harder to maintain.
A big challenge in medical product design is to identify and specify plastics that survive the harsh chemicals used when wiping down surfaces for sterilization. I'm glad to see plastic suppliers continue to address this issue and develop plastics that are more resistant to chemicals and bacterial growth.
Really scary to hear about this personal story about catching something from the hospital. In addition to plastics, 3drob, hospitals are trying out other new techniques to try to keep things clean. At Johns Hopkins there is a robot that is spraying disinfectant into the air to try to prevent people from catching these hospital superbugs: http://www.marketwatch.com/story/renesas-electronics-unveils-low-power-microcontroller-family-with-up-to-1mb-of-on-chip-flash-2013-03-06
So you're right, there is more they can do to keep things clean so people don't fall ill from the place that is supposed to make them better.
Rob, the rise of super-bugs is due in part to over-prescription of antibiotics for people and the less widely known use of antibiotics in animals raised for food, as well as poor control of disease in hospital environments. Antimicrobial materials can at least not give organisms a place to grow and spread if present, and harm sick people in hospitals even further, but they're not the cause of the bugs or their spread in the first place.
After a trip to the Emergency room, my whole family picked up the Rotovirus (a lot of people were there with the bug at the time), so this rings personal for me. We were careful (bordering paranoid) not to touch things, which leads me to think it's more the staff than the objects. As I sat there looking around, I couldn't help but think that so much more could be done to make the areas less prone to disease transmission (from the beds, chairs, curtains, tables, etc.) Making things easy to wipe down, easy to remove and sterilize, hard to capture/hold fluids seems the obvious first steps.
I like that they are developing plastics capable of surviving sterilization (presumably including autoclaving), but it worries me when they start embedding anything anti-microbial. Hospitals are becoming the engineering / breeding grounds of super bugs, and it's the over use of antimicrobial materials that is the root cause.
I agree, Liz. We don't normally think of plastic as a means for fighting disease, but they do in fact play a role in the medical systems that help us recuperate. The MD&M Show is always a great place to see materials, and this is an impressive compilation of this year's best.
Thanks for this, Ann, it's nice to see plastic being used for some worthy products. Infections in hospitals are a real problem. It's not an exaggeration to say people are sometimes more sick when they leave than when they go in. I in fact just heard of a friend's father who passed away from an infection he picked up in a hospital after he had a successful operation. So it's no joke. I hope these products help prevent such things from occurring in the future.
At IMTS last week, Stratasys introduced two new multi-materials PolyJet 3D printers, plus a new UV-resistant material for its FDM production 3D printers. They can be used in making jigs and fixtures, as well as prototypes and small runs of production parts.
Plastic bags can become useful as either raw materials for plastics or feedstock for fuel. It's when they're not recycled that they become a major problem. That's what California's bag ban will prevent.
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