Respirator having elastic straps having openwork structure
Various embodiments of a respirator are disclosed. The respirator can include a mask body and one or more elastic straps that are secured to the mask body on opposing sides. The elastic straps can have an openwork construction and can include a netting that has an array of polymeric strands periodically joined together at bond regions throughout the array. In one or more embodiments, the openwork elastic straps are lighter and more breathable than conventional straps. This improvement in breathability can make the respirator more comfortable to wear.
1. A respirator that comprises:
a mask body; and
a harness that comprises one or more elastic straps that are each joined to the mask body on opposing sides thereof, each of the one or more elastic straps comprising a netting that has an array of polymeric strands, wherein two polymeric strands of the array of polymeric strands are periodically joined together at bond regions throughout the array, wherein the two polymeric strands intersect each other at the bond regions but do not substantially cross over each other past the intersection.
2. The respirator of claim 1 , wherein each of the one or more elastic straps has a thickness of greater than 0 millimeters and up to 1 millimeter.
3. The respirator of claim 1 , wherein at least one of the one or more elastic straps comprises first and second layers of the netting, the first and second layers of the netting being secured to each other.
4. The respirator of claim 3 , wherein at least one of the one or more elastic straps comprises first and second layers of the netting, the first and second layers of the netting being secured directly to each other.
5. The respirator of claim 4 , wherein the first netting layer has a first color that is different from a color of the second netting layer.
6. The respirator of claim 5 , wherein the first and second netting layers are secured to one another such that the array of polymeric strands in each of the layers correspond to one another when viewed from a plane projected onto a major surface of the at least one of the one or more elastic straps.
7. The respirator of claim 1 , wherein open spaces of the netting are air permeable.
8. The respirator of claim 7 , wherein the open spaces are about 0.1 to 40 mm 2 in size.
9. The respirator of claim 8 , wherein the strands have a cross-sectional area of about 0.03 to 1 mm 2 .
10. The respirator of claim 9 , wherein one or more of the strands comprise a block copolymer.
11. The respirator of claim 10 , wherein the block copolymer is a styrene-ethylene-butylene block copolymer.
12. The respirator of claim 11 being a filtering face-piece respirator.
13. The respirator of claim 12 , wherein the harness comprises first and second straps that are each ultrasonically welded to first and second sides of the mask body.