Glass fiber filtration media with at least two different fiber diameters
OwnerRodney Wilkinsinventor
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Abstract
A method of forming filtration media, and the media so formed. The media has glass fibers of at least two substantially different diameters, such as 18 microns and 21 microns. Each of the glass fibers is continuous throughout the media and is substantially the same diameter along its entire length. The fibers can be made using a bushing plate in the Modigliani process in which the plate has orifices of at least two different sizes. The fibers made thereby have two different sizes, thereby resulting in a filtration media superior to conventional media, despite having a similar amount of glass and no more weight. The filtration media also has microspheres, in the range of about 3 to about 40 microns, which increase holding capacity.
Claims18
A method of making filtration media, the method comprising:
- (a) disposing a container of molten glass above a rotating drawing drum;
- (b) forcing molten glass through a plurality of orifices formed in a body beneath the container to form a plurality of glass fibers, wherein each of said fibers extends from a corresponding one of said orifices and each of said orifices has one of at least two substantially different orifice diameters, thereby causing each of said fibers to have one of at least two substantially different diameters;
- (c) reciprocating the container while wrapping said glass fibers around the rotating drawing drum to form a condensed mat of fibers around the drawing drum;
- (d) removing the condensed mat from the drawing drum;
- (e) expanding the mat's exterior dimensions by applying a tensile force to at least one edge of the mat.
A filtration media made of a plurality of continuous glass fibers, each of said fibers having one of at least two substantially different diameters, and wherein each fiber's diameter is substantially the same throughout the filtration media.
Dependencies are inferred from the claim text.