Basic knowledge of mask
Basic knowledge of mask
Source：Dongguan bangyin Technology
Air filter mask, or filter mask for short. Its working principle is to make the air containing harmful substances filtered and purified by the filter material of the mask before being inhaled.
Air supply respirator refers to a clean air source isolated from harmful substances, which is sent to the face of people for breathing through a conduit to the mask through the dynamic action such as air compressor, compressed gas cylinder device, etc.
Filter mask is the most widely used in daily work. The selection method and use conditions of this kind of mask are described in detail below. The structure of a filter mask should be divided into two parts. One is the main body of the mask, which can be simply understood as a frame of the mask; the other is the filter material part, including the filter cotton used for dust prevention and the chemical filter box used for gas prevention. Therefore, for the selection and use of filter masks, some products of Guangjia provide you with the following convenience, that is, you can use the same mask body, when dust-proof is needed in the dust operation environment, match with the corresponding filter cotton, so you put on a dust-proof mask; when you need to carry out gas prevention in the toxic environment, replace the filter cotton, and install the filter cotton with it The corresponding chemical filter box, so that it becomes a gas mask or according to your work needs, to provide you with more combinations.
Brief introduction of filter material of respirator
The filter materials of the protective mask are mainly divided into two categories, namely, dust-proof and gas-proof. Its function is to absorb harmful aerosols, including dust, smoke, fog drop, toxic gas and toxic vapor, etc. through filter materials, so as to prevent them from being inhaled by people.
Use of masks
In general, masks must be suitable in size and wear in the right way to be effective. Masks on the market are generally divided into rectangular and cup-shaped. The rectangular mask should have at least three layers of paper structure to protect it. The user should press the wire on the nose bridge of the mask, and then spread the whole mask along the nose bridge, so as to play the role. Let the child wear a rectangular surgical mask, because it has no fixed shape, if well tied, it can close to the child's face. Cup masks should be made sure that the density of the masks is enough after they are attached to the face, so that the exhaled air will not leak out. When wearing the cup-shaped mask, you can try to blow with your hands covered by the mask to check whether there is air leakage from the edge of the mask. If the mask is not tightly covered, you need to readjust the position before wearing it.
When to replace the mask
1. The mask is contaminated, such as blood stains, droplets and other foreign matters
2. The user feels that the respiratory resistance increases. Dust proof filter cotton: when the mask and the user's face are well closed, when the user feels a great respiratory resistance, it means that the filter cotton is full of dust particles and should be replaced.
3. Mask damage
4. When the anti gas filter box and mask are well closed to the user's door, when the user smells the smell of poison, the new mask should not be temporarily worn. From the perspective of human physiological structure, the blood circulation of nasal mucosa is very strong.