FILTERING FACE-PIECE RESPIRATOR HAVING PARALLEL LINE WELD PATTERN IN MASK BODY

摘要

A respirator (10) having a mask body (12) joined to a harness (14) and a harness (14) is disclosed. The mask body 12 includes a filtration structure 16 that can include a plurality of nonwoven fibrous material layers 58, 60, 62. The nonwoven fibrous material layers 58,60 and 62 have a thickness A and are welded together by two or more parallel weld lines 34 'and 34 "spaced apart by 0.5 to 6 times of A. Using a parallel weld line Can exhibit better collapse resistance and can be manufactured at a higher speed than a similar structure using a single weld line of similar width.