Product Details
Filter material of respirator
For a good filter material of the protective mask, the following three conditions should be met: first, the filter efficiency is high when the mask and the user's face are well closed; second, the respiratory resistance is small; third, the user feels comfortable. There are many kinds of filter materials for dustproof masks, including ordinary fabrics, animal hair, non-woven fabrics, etc. A kind of activated carbon felt material is very popular in the national standard.
The structure of gauze mask and the tightness of human face are very poor. Many tiny particles that do great harm to us will enter the respiratory tract and the lungs through the gap between the mask and the face. Its filter materials are generally some mechanical fabrics. The only way to achieve high dust resistance efficiency is to increase the thickness, and the negative effect of increasing the thickness is to let the user feel the respiratory resistance It's very big. I don't feel comfortable. The electrostatically treated non-woven fabric can not only block the large dust particles, but also the static charge attached to the surface of the non-woven fabric can absorb the small dust through the electrostatic attraction, so as to achieve a high dust resistance efficiency. But the thickness of the filter material is very thin, which greatly reduces the user's respiratory resistance and feels comfortable, so as to achieve the three necessary conditions of good filter material mentioned above. With a good filter material and a scientifically designed mask structure, an efficient and high-quality mask is formed.
Fit
The mask must be the right size and wear in the right way for it to work. Masks on the market are generally divided into rectangular and cup-shaped. The rectangular mask must have at least three layers of paper structure to have a protective effect. 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 is enough after the mask is 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.
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