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News

New Cryo-Therapy instrument relies on dimensional and temperature stability of Ketron PEEK

Quadrant EPP : 09 June, 2006  (New Product)
A cryo-therapy instrument, recently developed by H&O Equipments, Aalst, Belgium, has several key components made of Ketron PEEK-1000 Black, a high-performance plastic of Quadrant Engineered Plastic Products. The new device, called a CryoPen , freezes localized sections of human tissue, thereby destroying them while keeping the tissue's fiber structure.
The CryoPen is the first device not to use gas or liquid cryogens. The CryoPen is simply removed from the cooling base and placed onto the lesion. The CryoPen maintains a consistent ideal temperature for the duration of removing unwanted lesions.

The CryoPen has an aluminum body housed in a plastic grip. The pen has three crucial elements, all located at its head, and all machined to extremely-tight tolerances from Ketron PEEK-1000 Black. Medical treatment with the pen involves N2O gas flowing from a tank through holes in the pen's nozzle. The holes measure 0.03 mm and the gas flowing through them is -89 C. The critical parts of the pen must undergo daily sterilization by steam inside an autoclave, where the temperatures reach 135 C.

Although the pen's use is simple, its production thresholds are extremely demanding. The tip of the pen's tube is produced by an excimer laser that drills the very small diameter hole. (An excimer laser beam does not generate heat: instead it works by breaking chemical bonds.)

Ketron PEEK-1000 Black is an un-reinforced material, which offers the highest elongation and toughness of all PEEK grades. The newly developed Ketron PEEK-1000 Black is ideal for instrument components, where aesthetics are important. It also excels in seal components, where ductility and inertness are essential. 'Ketron PEEK-1000 Black offers outstanding steam and wear resistance,' said 'Products that are machined from it maintain excellent physical properties after repeated use, even with frequent exposure to 250 C temperatures from hot water or steam.'

Other key features of Ketron PEEK-1000 Black include very low moisture-absorption; inherently good wear- and abrasion-resistance; and excellent chemical resistance. The material is resistant to weak acids, alkalis, ketones, ethers, esters (acetone), hydrocarbons, chlorinated solvents, alcohols, and inorganic salt solutions.

Quadrant EPP's machining stock shape products range from Nylatron nylons and Acetron acetal to ultra-high performance polymers that resist temperatures over 800 F (425 C). Major uses include bearing and wear components in equipment for industrial production, food processing, packaging, semiconductor manufacturing, chemical processing, fluid management and power generation, and applications in the aerospace, electronics and life sciences industries. A worldwide technical service team supports engineers and machinists in material selection, application development and parts production.
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