Melt-blown cartridge filter

String-Wound, and Melt-Blown Cartridge Filters ... 

Fig. 21 Cartridge filters (A) Wound cartridge and (B) melt blown cartridges. (From Ref.. ) (View this art in color at WWW. dekker. com.)...

Disposable cartridge filters should be made of synthetic, non-degradable materials such as nylon or polypropylene. Their construction can be spun-bonded or melt-blown, string-wound, and pleated. These are described below. 

Spun-bonded or melt blown These cartridge filters are manufactured by thermally either bonding or heat blowing pure polypropylene microfibers so the density is lower on the outside surface and gradually gets denser toward the center of the filter. Spun-bonded or melt-blown filters have high capacity, as particles are trapped throughout the entire cross section of the filter. 

The vessels housing the cartridge filters may be oriented vertically or horizontally. Cartridges are rated for removal of particle sizes of 1,2,5,10, and 25 p,m, with the most frequently used size being 5 pm. Polypropylene wound cartridges are commonly used although other types such has melt-blown or pleated cartridges have also found widespread use. 

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