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US 4,113,535 AGranted
High temperature filter fabrics
AssigneeHuyck Corporation
InventorsLeonard R. Lefkowitz, W. Henrik Krohn
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Abstract
Generally, the present invention relates to a resin-treated filter fabric which comprises a surface or batt layer comprised of glass fibers which is joined, by needling, to an underlayer which is comprised of mineral fibers. The present invention includes within its scope a method of manufacturing such a filter fabric.
Claims11
A method of making a filter fabric comprising the steps of:
- (a) mixing a lubricating agent with glass fibers having a diameter of from 2-8 microns;
- (b) forming a non-woven batt layer from said glass fibers;
- (c) forming a base layer from mineral fibers;
- (d) resin impregnating and needling together said base layer and said batt;
- (e) pressing said fabric to a degree sufficient to obtain a predetermined resin solids pickup;
- (f) drying said fabric at a temperature sufficient to remove any liquid solvent;
- and
- (g) heating said fabric at a temperature sufficient to cure said resin.
5 more elements
Dependencies are inferred from the claim text.