Resilient shape-retaining fibrous filtration face mask
作者： Harvey J. Berg , Alice C. Murray , James F. Dyrud
DOI:
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摘要: New molded fibrous filtration face masks that are highly resilient and shape-retaining provided using one or more shaping layers, with a layer disposed on side of between the layers; layers having total basis weight at least 150 g/m2, an average density over central area mask no greater than about 0.2 g/cc, such bends during deformation elastically deforms tends to return its original thickness shape when deforming pressure is removed.
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