DUST COLLECTING BAG OF VACUUM CLEANER

摘要

PROBLEM TO BE SOLVED: To provide a dust collecting bag of a vacuum cleaner which can achieve high dust collecting efficiencies even at a low pressure loss which could not be attained fully by a dust collecting bag of a conventional vacuum cleaner. SOLUTION: An intermediate layer comprises a melt blown non-woven fabric composed of fibers each having a diameter equal to 10μm or less and has a weight of 3-30 g/m2, and a wet non-woven fabric composed of composite fibers for thermal bond of 10-70 wt.%, polyvinyl alcohol fibers of 0.5-10 wt.% and pulp and having a weight of 10-40 g/m2 is superposed integrally to each of the opposite sides of the intermediate layer to form a fiber sheet.