Plastic and nonmetallic article shaping or treating: processes – Forming articles by uniting randomly associated particles – Utilizing diverse solid particles
Patent
1994-04-18
1997-01-14
Dawson, Robert A.
Plastic and nonmetallic article shaping or treating: processes
Forming articles by uniting randomly associated particles
Utilizing diverse solid particles
264125, 264DIG48, 2105101, B29C 3902
Patent
active
055936261
ABSTRACT:
A molded filter element is fabricated by the method comprising the steps of: preparing a plastic composition of a powder-grain adsorbent of 100 weight parts, an emulsion type synthetic resin binder of 5-20 weight parts having a film-making capability at room temperature, an aqueous high-polymer binder of 0.5-5 weight part, and water of the amount sufficient to change the compound of these agents into a composition having its own shape holding property; pressure-filling said plastic composition in a mold composed of plural members to provide a molded filter element; evaporating water until the molded filter element has a shape-holding strength in a state where at least one member of said mold is removed; and heat-treating the molded filter element at a temperature of 110.degree.-160.degree. C. Thus, the molded filter element permits filtering and adsorption/removal of impurities to be performed simultaneously, and can have a large breaking strength, uniform openings, a small flow resistance and a large adsorption capacity.
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Dawson Robert A.
Jones Kenneth M.
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