How to correctly distinguish the good and bad of the gas mask

First, look - look carefully at the details of the various aspects of the appearance of the gas mask head than the narrow bandwidth is good (due to longer working hours, a wide relative will reduce the pressure of many heads, difficult to produce a sense of head pain);
Covering the mouth and nose is more narrow than the narrow side (such as a narrow fitting edge, will reduce the sealing guarantee of the mask, especially if the man has a beard, etc., may lead to leakage, so that gas into the interior, No protection effect at all;)
The appearance of the oropharyngeal mask is smooth but not shiny (it is purely for aesthetic reasons, it does not help the performance of the material, and sometimes it becomes ugly after use for a while);
At any joint or seam, there is no roughness (because it often needs to be worn during work, if there is a rough protrusion or scratch, it will hurt the skin).
Second, smell - the gas mask can also be judged by the smell, to determine the quality of the material before the choice or purchase, you can force the mask material by hand, until you feel the fingers hot, the mask surface temperature is also increased, the mask After the material is heated, the molecular motion will reveal the advantages and disadvantages of the material more practically. At this time, most of them will have rubber smell or other odors. The relative odor is lighter or has no odor. This kind of mask material is generally Well, it does not cause irritation to the skin during use (because many people belong to sensitive skin, if the material is not good, there may be skin diseases such as skin rash).
Third, touch - can be distinguished by the touch of the mask itself, and the performance of the material properties such as touch can be touched and light masks of the various sutures, connections and buckles and other parts, if loose or loose stitches, etc., can Judging that such mask manufacturers do not pay attention to quality assurance in production (because gas masks are safe products, so if such neglect can lead to fractures during use, shedding, so this product is recommended not to use);
Currently, there are approximately the following types of gas mask materials available on the market: rubber (used mostly by domestic materials), synthetic silica gel, thermoplastic elastomer TPE materials, Hycar (a foreign material name, because there is no suitable Chinese can be explained Therefore, direct reference, most of these material gas masks are imported brands), injection silicone (can be used for baby pacifier materials, is a safety level to achieve food grade materials, will not have any damage to the skin, is the world today The most advanced materials used for gas masks are generally imported brands with such products. Among them, rubbers and synthetic silica gels are also classified into different categories due to the differences in the composition of the materials added. Therefore, no introduction is made here.
For the above material types, it is better to smooth without any bumps, particles or obscure textures by hand (high brightness is not necessarily high quality).
Fourth, try - finally must try to wear, to help judge the merits of the entire mask a. wear masks, face, nose position feel a higher degree of fit, and then tighten the head and neck behind the buckle to Appropriate degree, such as without any feeling bumps or scratching the skin, is a better mask;
b. After taking it well, use your hands to hold both sides of the filter box or the canister port underneath to take a deep breath. The mask should be pulled in or shrunk. Such a mask can ensure that the sealing and the poisonous gas will not enter the mask; if it still feels air Into the mask, such inferior masks cannot be used in poisonous and harmful situations;
c. Since many chemical companies that use gas masks also require workers to wear hard hats, when workers leave their masks in a short time and need to remove their masks, they must first remove their helmets, wear masks, and reenter poisonous and harmful places. Once again, remove the helmet and put on the mask. Now there is a kind of gas mask on the market that is designed for this short time to leave and need to re-enter poisonous and harmful occasions. You can open the headband buckle when you leave, you can put the mask Hanging on the chest, it is not necessary to remove and wear a safety helmet, and it can liberate the hand with the mask, which is more conducive to other operations.

China Labor Insurance Network