Filter and method for making a filter

A filter is provided which includes an organic vapor adsorbing layer, a first particulate removal layer, and a second particulate removal layer. The organic vapor adsorbing layer includes porous adsorbent beads which allow air or gas to flow therethrough with little resistance and provide increased...

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Bibliographische Detailangaben
Hauptverfasser:	LIEBRENZ, ALLAN L, SCHNEIDER, KIRK A, DRASNER, III, HENRY J, KOJETIN, PAUL LAWRENCE, ISOGAWA, KATSUSHI, DALLAS, ANDREW J, NUNNINK, SUZAN K, MILLER, III, STANLEY BUCKNAM, BELLEFEUILLE, CYNTHIA D
Format:	Patent
Sprache:	eng
Schlagworte:	INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROMSOLID MATERIALS OR FLUIDS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PHYSICS SEPARATION SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS TRANSPORTING
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Beschreibung
Zusammenfassung:	A filter is provided which includes an organic vapor adsorbing layer, a first particulate removal layer, and a second particulate removal layer. The organic vapor adsorbing layer includes porous adsorbent beads which allow air or gas to flow therethrough with little resistance and provide increased surface area by virtue of the pores. The particulate removal layer can be made from an electrostatic and/or polytetraflouroethylene. The filter can have a figure of merit greater than about 10 and a capacity for permanently adsorbing organic vapors, wherein the figure of merit is calculated based upon a fractional efficiency determined for particles having a size of 0.3 mu m in an air flow having a velocity of 10.5 ft./min and for Frazier permeability at 0.5 inches H2O.