In the early 1960’s, Mott Corporation developed sintered powdered metal filter disc inserts that, in some cases, replaced the sand pack for filtration. The sintered structure eliminated the problem of channeling and provided more reliability. The sintered powdered metal disc also replaced the more expensive screen packs. PolyPak is a graduated porous metal filter that eliminates the need for an independent downstream screen pack and sealing mechanism. This reduces the number of components and decreases time necessary to form a traditional polymer spin-pack assembly.
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