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KN95 is China standard masks
From China national standard GB 2626-2006 "respiratory protective equipment self-priming prevent particulate respirator filter type"
(1) the standard source
This standard is mandatory national standards in China, put forward by state administration of work safety (saws), by the national individual protective equipment standardization technical committee (SAC/TC 112) under centralized.
(2) the technical content
From the scope of view, this standard applies to ordinary protection self-priming filter type respiratory protective equipment of all kinds of particles, the typical such as masks and other special environment (such as oxygen environment, underwater operation, etc.) shall not apply
From particulate matter definition, this standard defines the particles of various forms, such as dust, smoke, fog, and microorganisms, but not for the size of the particles.
From the filter element level, can be divided into oily and filter non oily particles KN type and non oily particles of KP, and as a mark, and the explanation of CFR 42-84-1995. Similar guidelines of N and R/P.
Filter element type
Mask the category
Mask with abandon
Replaceable type half mask
The comprehensive cover
KN type
KN90
KN95
KN100
KN90
KN95
KN100
KN95
KN100
KP class
KP90
KP95
KP100
KP90
KP95
KP100
KP95
KP100
From the point of filtration efficiency, this standard and the explanation of CFR 42-84-1995 N series of masks similar guidelines:
Filter element categories and levels
With sodium chloride particles detection
With oil particles detection
KN90
90.0% or higher
Do not apply
KN95
95.0% or higher
KN100
99.97% or higher
KP90
Do not apply
90.0% or higher
KP95
95.0% or higher
KP100
99.97% or higher
In addition, there are general requirements of GB 2626-2006, appearance inspection, leak, respiratory resistance, exhalation valve, dead space and field of vision, headband, connection and connecting parts, lens, air tightness, flammability, cleaning and disinfection, manufacturers should provide information, packing and other technical requirements.
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