A - Human Necessities – 41 – D
Patent
A - Human Necessities
41
D
2/81
A41D 13/00 (2006.01) A41D 13/11 (2006.01) B01D 39/08 (2006.01) B01D 46/10 (2006.01) D04H 13/00 (2006.01)
Patent
CA 1169601
ABSTRACT DISPOSABLE SURGICAL FACE MASK AND METHOD OF PRODUCING IT A disposable surgical face mask has a body portion adapted to cover the nose and mouth and has means to secure the body portion over the nose and mouth. The body portion comprises as the filter medium a nonwoven web including or consisting of fibrillated electret fibers, e.g. of polypropylene, said web having a weight of not more than 50 g/m2, e.g. 20 to 35 g/m2, and said fibers having an average width of at least 10 microns. The body portion may include support means for the filter medium such as two webs of nonwoven fabric retaining the filter medium therebetween. A method of producing the face mask is described in which the filter medium is provided by laying a web of fibrillated electret fibers by air-laying means.
377447
Coates David A.
Smith Rory J.m.
Surgikos Inc.
Swabey Ogilvy Renault
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