B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 39/08 (2006.01) A41D 13/00 (2006.01) A41D 13/11 (2006.01) A62B 23/02 (2006.01) B03C 3/28 (2006.01) D04H 1/42 (2006.01)
Patent
CA 2239789
A breathing mask fabric is provided which has between 50 and 95 weight percent of a through-air bonded, electret treated, nonwoven microfiber first web of fibers where the fibers have an average diameter of between about 10 and 25 microns and where the first web has a Frazier Permeability above about 100 CFM/SF, a density of between about 0.015 and 0.15 gms/cc, and a basis weight between about 67 gsm and about 340 gsm, and between about 5 and 50 weight percent of an electret treated microfiber second web of fibers where the fibers have an average diameter of less than about 10 microns.
L'invention concerne un masque respiratoire comprenant entre 50 et 95 % en poids d'une première nappe de microfibres non tissées, traitées par électret et soudées de façon à être perméables à l'air, dont les fibres ont un diamètre moyen compris entre 10 et 25 microns environ, et ayant une perméabilité de Frazier supérieure à 100 cfm/sf environ, une densité comprise entre 0,015 et 0,15 gms/cc et une masse surfacique comprise entre 67 et 340 gsm environ; et entre 5 et 50 % en poids d'une seconde nappe de microfibres traitées par électret, dont les fibres ont un diamètre moyen inférieur à 10 microns environ.
Pike Richard Daniel
Singer Irwin Jerold
Borden Ladner Gervais Llp
Kimberly-Clark Worldwide Inc.
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