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US 2024/0081438 A1Published application
Sanitary mask sheet
AssigneeKao Corporation
InventorsTomoyuki MOTEGI, Ryota SHIIBA, Masataka ISHIKAWA, Yuta ABE
Life of this patent
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Abstract
A sanitary mask sheet, in which a WC value indicating a work volume up to a maximum pressure in a thickness direction is 0.3 Pa·m or more, and a capture rate of particles having a particle diameter of more than 1 μm is 85% or more.
Claims21
1-42. (canceled)
A sanitary mask sheet assembly, comprising one or more sheets:
- wherein the sanitary mask sheet assembly comprises a fine fiber layer having an average fiber diameter of 3000 nm or less and a density of 0.05 g/cm3 or more;
- and
- wherein one of the one or more sheets included in the sanitary mask sheet assembly has a first surface and a second surface opposite the first surface, and the one sheet is a projecting-and-depressed sheet with a plurality of projections projecting outward in a thickness direction and depressions between the plurality of projections at least on the first surface in a natural state of the sanitary mask sheet.
A sanitary mask comprising a sanitary mask sheet assembly, the sanitary mask sheet assembly comprising one or more sheets;
- wherein the sanitary mask sheet assembly comprises a fine fiber layer having an average fiber diameter of 3000 nm or less and a density of 0.05 g/cm3 or more;
- and
- wherein one of the one or more sheets included in the sanitary mask sheet assembly has a first surface and a second surface opposite the first surface, and the one sheet is a projecting-and-depressed sheet with a plurality of projections projecting outward in a thickness direction and depressions between the plurality of projections at least on the first surface in a natural state of the sanitary mask sheet.
Dependencies are inferred from the claim text.