Abstract
Abstract: In this study, a melt-blown nonwoven filter for medical masks was manufactured using an online hydrocharging system. The effects of basis weight (gsm) and die to collector distance (DCD) on the breathing resistanceand filtration efficiency were investigated. Hydro charging of the nonwoven web seemed to improve the filtering effi-ciency. However, it did not affect breathing resistance. It was demonstrated that the breathing resistance and filtrationefficiency increased with increasing gsm but decreased with increasing DCD. With a DCD of 19 cm, when the gsmincreased from 20 to 50 gsm, breathing resistance increased from 5.14 to 8.33 mmH 2 O and filtration efficiencyincreased from 81.39 to 94.98%. With a basis weight of 25 gsm, when the DCD increased from 15 to 25 cm, breath-ing resistance decreased from 7.38 to 4.27 mmH 2 O and filtration efficiency decreased from 89.56 to 68.28%. In addi-tion, it was demonstrated using stability tests that the hydro charging effect lasted for 13 weeks.Keywords: melt-blown nonwoven, hydro charging, medical mask, filtration efficiency, breathing resistance
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