2020 Jul 04
There are two kinds of non-woven masks. One is made of pure cotton absorbent gauze or knitted fabric with various non-woven fabrics in the middle. The other is sewn directly from nonwoven fabric.Its filtration effect is good, breathable slightly poor, the latest varieties for the surface and back for non-woven material, the middle for the filter paper, so that the non-woven mask filtration effect of a higher level. The relevant documents on the technical requirements of medical protective masks were issued by the General Administration of Quality Supervision, Inspection and Quarantine on April 29, 2003 and implemented on the same day.