In addition to the sanitary requirements higher, medical respirator should also have the function of the effective barrier fluid spillage.
Because in the operation, the possibility of blood or infectious fluid spillage, have certain pressure, the splash is not a general liquid infiltration, mask material block has the ability to pressure liquid should be relatively high, only in this way, can effectively protect the medical staff.
So in the standard of medical protective mask, adopt the special testing method to test the barrier fluid of this kind of product performance, and general industrial environment the use of respirators, don't need to have this kind of special requirements, testing standard and natural no such rules.
In addition, medical respirator exhalation valve is not permitted.
This is due to medical respirator allow used as surgical mask
s, if wearing a mask of exhalation valve, exhale will be carried by microorganisms in direct discharge masks, pose a threat to patients undergoing surgery.
And many industrial respirators are the design of the exhalation valve, exhalation valve is a one-way valve, when users inhale, mask internal negative pressure, the valve closed, the air from the filter material into the breathing zone;
Exhale, masks for positive pressure, exhalation valve open, expiratory directly discharge.
This design is to reduce the expiratory resistance, help get rid of humid air, feeling relatively cool.
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