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在生产中使用的化学毒物常以气体、蒸气、雾、烟、粉尘等形态污染生产环境的空气。特别是微小粒子烟、雾,可长期飘浮在空气中,易于经呼吸道侵入人体,所以危害较大。经呼吸道吸入发生急性中毒者约占93％。防止有毒物质经呼吸道侵入人体的最好工具,是过滤式防毒面具(口罩)。过滤式防毒口罩,可用纱布、滤纸、滤膜或泡沫塑料等作为滤料。常用的八层纱布口罩只能用于分散度较低的粉尘或雾状毒物。分散度较高者,特别是烟,最好采用滤纸、滤膜或泡沫塑料为滤料。
Chemical poisons used in production often pollute the air in the production environment in the form of gas, vapor, fog, smoke, dust and the like. Especially small particles of smoke, fog, long-term floating in the air, easy to invade the human body through the respiratory tract, so more harmful. Acute poisoning by respiratory tract inhalation accounts for about 93%. Prevent toxic substances through the respiratory tract invade the body’s best tool is a filter respirator (mask). Filter-type protective masks, available gauze, filter paper, filter or foam as a filter. Commonly used eight gauze masks can only be used for the low degree of dispersion of dust or mist poison. Dispersion of the higher, especially smoke, the best filter paper, filter or foam for the filter.