First, the use of general masks
Masks must be sized and worn, and the mask must be effective. The masks sold on the market are generally divided into rectangular and cup-shaped. Rectangular masks must have at least three layers of paper in order to have a protective effect. The user should put the wire on the mask on the bridge of the nose, and then along the nose will spread out the whole mask in order to play the effectiveness. Allow the child to wear a rectangular surgical mask, because it does not have a fixed shape, if tied well, can close the child's face. Cup-shaped mask will have to ensure that the mask attached to the face after the density is enough, call out the air will not leak to be effective. Wear a cup-shaped mask, you can cover the hands with a mask to try to blow, check whether there is air from the edge of the mask leakage, if the mask is not tight, it is necessary to re-adjust the position and then wear.
Second, 3M series of mask the right way to wear
1. Raise the headband every 2-4 cm (apply only to Model 8210).
2. Place the mask in the palm of your hand and position the nose metal toward the fingertips.
3. Wear a mask, nose metal part of the up, close to the face.
4. Place the top of the mask on the head, then the lower end of the head with the head, placed in the neck, adjust to a comfortable location.
5. Hands your fingertips along the bridge of the nose metal, from the middle to both sides, slowly press inward until the nose close to the nose.
6. Hand as much as possible to cover the mask and positive pressure and negative pressure test. Positive pressure test: hands covered with masks, vigorously exhale. Such as air from the edge of the mask overflow, that is, improperly worn, must be adjusted again headband and bridge of the nose; negative pressure test: hands covered with masks, vigorously exhale. The center of the mask will be stuck, if the air from the edge of the mask into the door, that is, wearing properly, to be re-adjust the headband and bridge of the nose metal.
7. Breathing valve function: in the hot or humid or poor ventilation or large working environment, the use of a mask with a breathing valve can help you feel more comfortable when exhale. The principle of the action of the breathing valve is to exhale the positive pressure of the exhaust gas to blow the valve to quickly remove the body exhaust, reduce the use of masks when the hot feeling, and inspiratory negative pressure will automatically shut down the valve to avoid Inhalation of contaminants into the external environment.
Third, when need to replace the mask
1. Mask contaminated such as stained with blood stains or droplets and other foreign body;
2. The user feels greater resistance to breathing;
3. Mask is damaged.
4. Dust filter cotton, in the mask and the user's face in good condition, when the user feels great breathing resistance, indicating that the filter has been filled with dust particles, should be new.
5. Antivirus filter box, in the mask and the user close the door in the case of good, when the user smell the smell of toxic substances, the change of the new.