Polypropylene fleece plant introduces fluorocarbon after fiber production to form surface coating particularly economically, using small quantity for disproportionate increase in filtration efficiency

摘要

Between extrusion and formation of the fiber bonds, a dosing unit supplies impregnating material based on fluorocarbon. An Independent claim is included for the method of manufacture. Directly following their formation, impregnating additives are dosed to the fibers. The additives are especially fluorocarbon based. Preferred features: The dosing unit is a nozzle, especially a two-component nozzle.