| 摘要 |
PROBLEM TO BE SOLVED: To improve a hygienic mask which includes a covering part for covering the mouth and nose of a person, made by overlapping a plurality of sheets of materials heat sealable with each other and having air permeability, and mounting parts extending from both side parts of the covering part.SOLUTION: A pattern is made by heat sealing a plurality of sheets of materials constituting a covering part 10 along a line constituting a graphic form, and making the heat sealed portions visually different from the other portion. It is more effective to make a vertical direction dimension of the sheet on the outermost side or innermost side among the plurality of sheets constituting the covering part 10 larger than that of the other sheet, fold beyond the edge of the other sheet, connect the end edges of folded portions 60 and 62 with the covering part 10, and form a pattern, instead of a connection line 44 conventionally formed along one line in order to prevent pleats from extending by connecting lateral walls of the pleats in end parts of a plurality of pleats formed in the covering part 10. |
