Pre-filter and dust mask for dust mask .

摘要

PROBLEM TO BE SOLVED: To provide a pre-filter for a dust-proof mask, which is excellent in powder dust collection property, a ventilation characteristic, dust separation property, and maintenance property.;SOLUTION: The pre-filter for a dust-proof mask is the pre-filter to be arranged on an upstream side in an intake air flow direction with respect to a main filter to be mounted on a dust-proof mask body. The pre-filter includes: a base body being a fiber structure body; and inorganic fine particles to be fixed to the base body. The base body is also the fiber structure body with a woven mat structure in the pre-filter for a dust-proof mask.;COPYRIGHT: (C)2012,JPO&INPIT