A mask including a sub-filter layer and having improved intake resistance and filtering efficiency

摘要

The mask according to the present invention includes an outermost layer; sub-filter layer; main filter layer; and the innermost layer is sequentially stacked, and the sub-filter layer includes a melt blown nonwoven fabric having an air permeability of 200 to 2,000 CFM. It is characterized in that the differential pressure (resistance) is 0.1 to 3.0 mmH 2 O when measuring the particle size aerosol in an amount of 95 L per minute. It is a mask with more than 70% efficiency when measuring the aerosol of 32L per minute.