| 摘要 |
PURPOSE: A dustproof mask is provided, which achieves good dust collection efficiency and lowers facial area inspiratory resistance. CONSTITUTION: A dustproof mask comprises a fibrous structure material(A); and nano-fiber web(B) consisting of nano-fibers whose average diameter is 10~1,500 nanometers. The material and nano-fiber web are comprised of polymers with different electrification. The dust collection efficiency of the fine dust is 95% or greater. The material is polymer selected from polyethylene terephthalate and polypropylene.
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