KN90 masks mainly applicable to industries with oily and non-oily pollutants such as dust, smoke, fog and other particles above 0.185 microns produced by non-ferrous metal processing, metallurgy, steel, coking, gas, organic chemicals, food processing, construction, decoration, petrochemical and asphalt.
KN90 mask should not be easy to cause structural damage, and the design, composition and installation of components should not pose any danger to users.
KN90 masks are the standard for respiratory protective equipment GB2626-2006 promulgated by the National Quality Supervision, Inspection and Quarantine Bureau and the National Standardization Management Committee.
a) The size of the central part of the rectangular mask after deployment: the length is not less than 17cm, and the width is not less than 17cm; b) The size of the close-fitting arch mask: the transverse diameter is not less than 14cm, and the longitudinal diameter is not less than 14cm.
Dust masks are classified into KN and KP according to their performance. KN is only suitable for filtering non-oily particles, and KP is suitable for filtering oily particles.
KN90 Masks Filter material requirements,the materials used should have sufficient strength and should not be damaged or deformed during normal service life.