FIELD: medicine.
SUBSTANCE: present invention refers to means of protection and aims at preventing the penetration of contaminants and particles in human airways. A filtration respiratory face mask 10 comprises an attachment system 14 and a mask base 12 coupled with the attachment system 14. The mask base 12 comprises a filter insert 16 of the thickness A and accommodates two parallel weld lines with the welds being spaced 0.5A to 6A.
EFFECT: mask base comprising parallel weld lines can show high deformation stability and requires less time for production as compared with the mask bases of the similar structure comprising single weld lines of comparable widths.
18 cl, 8 dwg
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