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Type |
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Advantages
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Disadvantages |
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Woven fabrics |
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High wet/dry strength; dirt-holding capacity
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Unstable interstices |
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Screen fabrics |
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Highly stable interstices; high flow rates
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Expensive, especially in lower pore-size ratings
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Nonwoven fabrics |
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Inexpensive; dirt-holding capacity
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Random interstices |
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Paper media |
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Inexpensive; dirt-holding capacity
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Fiber release; particulate unloading; low wet strength
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Glass media |
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High-temperature and chemical compatibility; high dirt-holding capacity
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Fiber release; particulate unloading |
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Ceramic media |
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High-temperature and chemical compatibility
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Expensive; brittle
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Metal media |
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High-temperature applications; reusable; diverse properties
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Expensive; high recleaning costs
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Filter aids |
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Inexpensive; used for pre-and final filtration
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Limited application |
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Molded porous plastics
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Dirt-holding capacity; broad polymeric compositions
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Restricted to rigid forms |
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Acrylic
copolymer/nylon fabric
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High wet/dry strength; superior fabrication properties
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Cannot withstand steam |
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Mixed esters of cellulose
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Non-specific protein-binding
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Brittle; low tensile strength |
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Nylon
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Inherently wettable |
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Hydrolytic degradation |
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PTFE |
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Chemical/high-temperature resistance
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Gamma irradiation sensitive; inherently hydrophobic
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Polycarbonate
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Narrow pore-size distribution
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Low throughput; low void volume |
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Polypropylene
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Excellent chemical resistance
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Inherently hydrophobic |
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Polysulfone
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Steam sterilizable; can be made low-protein-binding
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Poor hydrocarbon resistance |
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Polysulfone-polymer/polyester fabric |
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Steam sterilizable; can be made low-protein-binding; superior fabrication properties |
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Poor hydrocarbon |
