For the filter material of a good protective mask, the following three conditions should be met. First, the filter efficiency is high when the mask is close to the user’s face, second, the respiratory resistance is small, and third, the user feels comfortable. There are many kinds of materials for dust-proof masks, including ordinary fabrics, animal hair, non-woven fabrics, etc. Activated carbon felt material is very popular in the national standard.
The structure of the gauze mask is very inadequate to the human face. Many small particles that are extremely harmful to us will enter the respiratory tract to the lungs through the gap between the mask and the face. Its filter material is usually some mechanical fabric. The only way to achieve high dust resistance is to increase the thickness, and the negative effect of increasing the thickness is to make the user feel that the breathing resistance is very large and uncomfortable. The non-woven fabric after electrostatic treatment can not only block large dust particles, but also the static charge attached to its surface can attract fine dust through electrostatic attraction, achieving a high dust suppression efficiency. The thickness of the filter material is very thin, which greatly reduces the user’s breathing resistance and feels comfortable, thus achieving the three necessary conditions of the good filter material we mentioned earlier. With good filter material and the scientifically designed mask structure, a high-efficiency and high-quality mask is formed.
Executive Standard: YY / T 0969-2013
Post time: Apr-15-2020