Patent ID: 6703072
Filing Date: 2004-03-09
Classification: B01D,B01J,Y10S

Abstract:
A method of utilizing the aerodynamic interlacing process to produce a chemical filter media, comprising the steps of:(a) utilizing airflow to bring short-cut fibers and functional particulates to a composite air blower while the blowing airflow of said functional particulates enters into said composite air blower from the center thereof, and said composite air blower is constructed as a conventional blowing apparatus with a substantially rectangular cross-sectional shape to form a narrow and slim blowing mouth, thereby enabling the blowing air of said short-cut fibers and said functional particulates to enter into a diffusing mixing conveying area at the same time so that the mixed airflow diffuses said short-cut fibers and said functional particulates from the top to the bottom which flow afterwards through an air deflector or guide device so that the airflow is able to smoothly bring them to a multilayer interlacing forming area beneath, (b) utilizing an air suction device under said multilayer interlacing forming area to adsorb said short-cut fibers and said functional particulates for sequentially piling up on a moving forming matrix while the suction air volume of the air suction device is adjusted as desired in order to create a balance between said suction air volume and said mixed blowing air so that said filter media is formed with a laminated structure having three layers, consisting of a protection layer situated at the bottom of the pre-formed filter media, a flow equalizing layer situated at the top of said pre-formed filter media, and an adsorptive layer situated between said protection layer and said flow equalizing layer, wherein the adsorptive layer contains a greater density of functional particulates than the density of functional particulates contained in the protection layer or the flow equalizing layer; (c) bringing said pre-formed filter media to a heat treatment area over which a heat source is provided for heating said filter media while the heating temperature is controlled in the range of from 120Â° C. to 180Â° C.; and (d) bringing said heat-treated filter media to a quenching or cooling area, wherein a further air suction device under said filter media continues to operate.