(1) The executive standard of respiratory protective equipment
the executive standard of respiratory protective equipment is the basis for the selection of respiratory protective equipment, and attention should be paid to prevent the selection of respiratory protective equipment whose implementation of the standard has been stopped by the state. At present, the national industrial product production license office announced that gb2626-2006 “respirator for respiratory protective equipment with self-priming and filtration type” standard will be implemented from August 1, 2009, and gb2626-1992 “respirator for respiratory protective equipment with self-priming and filtration type” standard will be replaced at the same time. This is a sign to identify the quality of the product
(2) protection grade and filtration efficiency
protection grade and filtration efficiency are important standards of protection safety. Because. The higher the protection level and filtration efficiency of the gas mask, the higher the safety of the wearer. The filtration efficiency is based on its barrier efficiency for fine dust, especially for respirable dust with medium particle size above 0.075 μ M. Because this particle size of dust can enter the alveoli directly, it has the greatest impact on human health. General gauze mask, its dust resistance principle is mechanical filtering, that is, when the dust collides with the gauze, through layers of barrier, some large particles of dust are blocked in the sand cloth. However, for some fine dust, especially for 0.075 micron dust, it will pass through the mesh of gauze and enter the respiratory system. At present, gas masks in the world are made up of fibers filled with permanent static electricity. The 0.075 micron respirable dust is attracted by static electricity and adsorbed on the filter material in the process of passing through the filter material to capture fine dust, which really plays a role in dust suppression
(3) the fit of mask and face shape
air is like water flow, where the resistance is small, it flows first. When the shape of the mask is not close to the face, dangerous substances in the air will leak into the respirator and enter the respiratory tract. Well, even if you choose a mask with a better filter material. 1t can’t protect your health. At present, many foreign regulations and standards stipulate that workers should regularly test the tightness of masks. The purpose is to ensure that workers choose appropriate masks and wear masks according to the correct steps< (4) comfortable to wear requirements. The respirator should have low respiratory resistance, light weight, no peculiar smell, no skin irritation, hygienic wearing and convenient installation. 1n this way, workers will be willing to wear them in the workplace and improve their work efficiency China labor insurance net