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  • Effect of Chemical Exposure On Polyvinyl Chloride (PVC)
    The ratings are to be used as a guide in selecting the most suitable product for a specific extrusion application at a standard temperature and pressure. Most powders, in general, present very little problem for PVC. Every application is different. In some cases there may be discoloration of PVC
    009;Unfortunately, exposure to gamma radiation has a negative effect on the appearance of flexible PVC. While physical properties and viscosity remain unchanged, immediately after sterilization the material tends to darken or yellow. Compound darkening is autocatalytic, and continues after
  • Medical Device Link . Specialty Compounds for Medical Applications: An Introduction
    the information presented should be helpful in the production of any polymer-based device, the discussion is particularly geared toward compounds for catheters and other medical tubing products. Depending on the precise application, a typical starting resin might be PVC, thermoplastic polyurethane
  • Medical Device Link .
    alternatives. They may want to reconsider, based on news from chemicals giant BASF (Ludwigshafen, Germany). The company has announced the development of a plasticizer for soft PVC compounds for sensitive applications such as medical devices that has tested safe with no side effects or characteristics
  • Medical Device Link .
    from various environmental and healthcare activist groups. Their concerns are related to the contention that, under certain conditions, small amounts of the plasticizer may leave the flexible PVC compound an act referred to as leaching, migrating, or extraction. This extracted plasticizer could
  • Medical Device Link .
    flexible PVC compound sells for 85 cents per pound. Polyurethanes sell for 10 -20 times that amount. So what is it that motivates medical device developers to use them? The answer is quite simple: polyurethanes can be used in applications where other materials do not work. Polyurethanes are among
  • Drum Mixer Compounds Wide Range of Particles; Modified Paddle Mixer Solves Tricky Problem
    A manufacturer uses a Munson rotary drum mixer for thorough mixing of a polymer-cement coating, and a paddle mixer with incorporated choppers to blend PVC with wood fibers and other ingredients.
  • Medical Device Link .
    problems with disposal. The softness, flexibility, and low-temperature characteristics of PVC are determined by the type and amount of plasticizer used in the compound. The most widely used plasticizer, di-ethylhexyl phthalate (DEHP), has been linked to toxic effluents produced during manufacturing

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