| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a pleat type hygienic mask for a standard home, which can be lightly worn, which decreases a leakage rate because it is excellent in fitness (adhesion) to a face, and which is excellent in a balance between dust removal efficiency and a pressure loss.SOLUTION: A pleat type hygienic mask is made of at least three kinds of nonwoven fabrics, that is, a mouth-side innermost layer (A), a filter layer (C) and an outermost layer (B). A seal material is installed in a part abutting on a person's cheek and positioned at a peripheral edge of the mask on the innermost layer (A). At least one of the innermost and outermost layers (A) and (B) has a bending resistance of 70-150 mm based on JIS L1096 (a 45° cantilever method), and the filter layer (C) is the nonwoven fabric that has a pressure loss of 45-120 Pa under an air current at 85 L/min.</p> |
