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Where foam fits in medical design
damage. Polyurethane ether's hydrolitic stability prevents swelling or degradation, which enhances liquid filtration. On the other hand, polyurethane ester is more useful to air filtration because of its good resistance to UV degradation and stronger tensile and tear properties. Multilayer filters can
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Glossary of Tems for Technical Foams
, mechanical interlocking, or a combination of both. Aerosol. A suspension of extremely fine liquid droplets in a gas, usually air. AFI Filter Tester. Air Filtration Institute test equipment utilized to evaluate a filter media such as reticulated polyurethane foam for its ability to filter particles from
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Hydraulic and Pneumatic Filters
in the circuit, such as on the return line, in a pressure line, or on a bypass line. Filtration for pneumatic systems is handled quite differently. In most industrial pneumatics, compressed air is supplied from a single compressor to a large number of operating systems, as a plant resource, much like
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Contamination: hydraulic system enemy no. 1
Up to 90% of all hydraulic system failures can be attributed to contaminated oil, says hydraulic component maker Muncie Power Products, Muncie, Ind. And a recent Canadian study found particlecontaminated hydraulic oil accounts for 82% of all wear. Filtration systems help avert the problem
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Liquid Level/Interface Monitoring in Flocculant/Sludge Control (.pdf)
In municipal and industrial wastewater treatment plants, sludge clarifiers are utilized to separate solids from the water treatment effluent system by introducing air and flocculants. This process results in the sludge rising to the top of the pond or tank and spilling over a weir into a separate
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Bubreak siloxane
and elasticity make the foam lamella stable against mechanical force. Foam changes character during the time from micro-foam to polyhedral foam and a so-called plateau border is formed between the air bubbles. Thus, liquid films become thinner by drainage due to gravity. High temperature reduces
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New fridges: More Features, Less Juice
eliminate any sharp turns that can cause turbulence. They also work closely with compressor manufacturers and fan-motor suppliers to boost tolerances, and cut vibration and air-induced noise. "We manage the transmission paths within the product from a vibration and sound-generating standpoint, putting
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MICRO:Process Equipment-Lithography, by Zhou Lin (Feb 99)
been a progression of changes in the filtration of the air supply to photo tools, and a chemical air filter integrated in the cluster tool lessens the possible airborne contamination level.5 In parallel, monitors have been developed to measure ambient contamination levels. Nevertheless, the materials