CNDR Drum Blast |
FA Sinto's CNDR Drum Blast features less parts maintenance than tumblast machines, faster overall cycle time, zero pinch design that eliminates jams, and a no leak drum design. The CNDR is low maintenance, has low operating costs, and minimizes downtime.
T75 Series TCXO|
Available For a Limited Time Only On a short-lead time, expedited delivery basis for standard frequencies. 10.0, 14.4, 20.0, & 40.0 MHz Models HCMOS or Clipped Sine Output +3.3V or +5.0V Supply Tight Stability from -40 to +85°C Ruggedized 5 x 7mm package 500pc Reel Sizes Competitive Pricing Download T75 Specification Sheet
Reliable quality and metal cutting innovations.|
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Gamma sterilization, the use of gamma radiation to eradicate microorganisms, is frequently used in the medical industry to sterilize surgical devices, instruments, and equipment. Due to recent advances in micro-molding and the versatile uses of thermoformed plastic, many important devices in the medical industry are composed of a combination of plastic polymers.
The rise in thermoformed plastic device production and use in the medical arena is accompanied by a complex issue—because thermoformed plastics can be comprised of a variety of different combinations of polymers, not all thermoformed plastics react to gamma radiation the same way. In fact, some thermoformed plastics will lose their structural integrity, degrade, or exhibit discoloration as a direct result. Still, gamma radiation is quick, cost-effective and can even be used on some types of pre-packaged equipment.
Determining Appropriate Materials for Gamma Sterilization
Depending on the presence of additives such as pigments, lubricants, or glass-fiber, thermoplastic will respond differently to gamma radiation. For example, polycarbonate composites with carbon-fiber or glass-fiber retain their tensile strength, even when exposed to an unusually high level of gamma radiation. On the other hand, the presence of glass-fiber in an acetal compound will greatly diminish the composite’s tensile strength when exposed to the same high level of gamma radiation. Regardless of additives, acetal in general is not well-suited to withstanding gamma rays.
Many materials yellow as a result of gamma radiation, although some are more resistant than others. If glass-fiber is present in a polycarbonate composite, the yellowing effects of gamma rays are significantly lessened. Materials that are dark in color also will not show much color change, although they still may exhibit degradation.
Understanding how different materials react to gamma radiation is helpful when determining if gamma radiation is appropriate for a specific application. Although much depends on the exact make-up of a specific polymer, there are some general rules that may be useful when considering the process. Medical Device & Diagnostic Industry Magazine offers the following tips.
When in doubt about a material’s ability to undergo gamma sterilization, information is often available from the polymer manufacture. Having a better understanding of a material’s components may help in deciding if gamma radiation is an appropriate choice.
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