| 摘要 |
PROBLEM TO BE SOLVED: To improve the shape maintaining characteristics of a filter part and the fittingness of a mask in a disposable dust mask with face cushion. SOLUTION: This mask is composed of a filter part 11 formed almost semispherical so as to cover nose and mouth parts by laminating a prefilter 11a, main filter 11b and shape filter 11c and a face cushion 12 extended from all the outside edges of the filter part 11 to the center while having openings at sections located in the nose and mouth parts. Then, the shape strength of the shape filter 11c has the distribution of strengths/weakness so that the sections of the filter part 11 located in bridge part of nose and chin part can be soft and the other sections can be hard. |
