We wear masks in our lives mainly to isolate dust, haze, bacteria and other pollution and viruses. According to different protection requirements, the classification of masks is also different. Ordinary flat masks generally consist of three layers, and the upper and lower sides are made of PP non-woven fabric. The middle layer is a protective melt blown cloth, which is generally 20 grams in weight; while the N95 cup mask is composed of hot air cotton, melt blown cloth, and non-woven fabrics. The melt blown cloth is usually 40 grams or even Higher, coupled with the thickness of needle-punched cotton, so it looks thicker than a flat mask in appearance, and its protective effect can reach at least 95%.
Surgical mask: divided into 3 layers, the outer layer blocks water, the middle layer blocks 5μm particles >90% in the air, and the inner layer absorbs moisture. N95 mask: N95 is certified by the American Institute of Occupational Safety and Health. N refers to non-oily particles, and 95 refers to a filtration rate of 95% under the test conditions specified in the standard, which has good adhesion. Selection principle: Gauze masks or disposable surgical masks can be worn for general medical activities. Wear a surgical mask when working in the operating room or nursing patients with weakened immune function, and when performing body cavity punctures. When contacting patients with respiratory tract infections spread by air or droplets, they need to wear medical protective masks or N95 masks.
For more information on mask materials, please contact Guide.
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