Method of forming an impregnated micro-fiber filtration unit
A method of forming a blown micro-fiber filtration unit having multiple overlapping layers of fibrous material and an active material applied over said layers, The fibrous material layers being fused together.
1. A method of manufacturing a filtration unit comprising the steps:
(a) providing a molten base material;
(b) propelling said base material through a nozzle between a pair of spaced apart rollers by air flow into elongated strands onto a mandrel;
(c) winding said strands upon said mandrel in an overlapping, self-adhering manner to form a filtration unit;
(d) closing said rollers about said strands to interrupt said air flow;
(e) depositing said active material upon said strands between said rollers and said mandrel while said rollers are closed about said strands.
2. The method of claim 1 and further comprising the step of heating as least one of said rollers.