1.Material: polycarbonate
2. Muzzle mask material: food-grade silica gel
3. Face mask material: medical grade silicone
4. Mask respirator valve: when the respirator valve depressurizes to -1180pa, the negative pressure value within 45s of the overall mask respirator valve drops to ≤500Pa or less.
5. Overall hood leakage rate: the overall hood leakage rate is 0.02%
6. Inhalation resistance of mask: ≤40Pa, exhalation valve resistance of mask: ≤100Pa
7. Total visual field: total visual field is ≥70% and binocular visual field is ≥ 55%
Lower visual field ≥35° oil mist transmittance ≤0.005
8.Mask leakage coefficient is less than or equal to 0.005%
9.Bonding strength of mask and filter: no obvious damage at 250N
10.Inspection basis: gb2890-2009 respiratory protective self-suction filter gas mask
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