초록 ▼

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

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 H.sub.2 O.

대표청구항 ▼

[ What is claimed:] [1.] A filter comprising:(a) layer of particulate removal medium having a thickness of between about 0.1 and about 5.0 mm;(b) layer of organic vapor adsorbing medium comprising porous activated carbon beads affixed to a substrate, wherein the porous activated carbon beads have an

[ What is claimed:] [1.] A filter comprising:(a) layer of particulate removal medium having a thickness of between about 0.1 and about 5.0 mm;(b) layer of organic vapor adsorbing medium comprising porous activated carbon beads affixed to a substrate, wherein the porous activated carbon beads have an average diameter of between about 0.3 and about 1 mm, and said porous activated carbon beads being impregnated with between 1 and 20% by weight chemical for adsorbing acid gas; and(c) scrim layers covering said layer of particulate removal medium and layer of organic vapor adsorbing medium, and wherein said filter has sealed edges,wherein said filter has a figure of merit greater than about 60 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 H.sub.2 O.