Disposable ordinary mask: The three layers are all non-woven fabrics, the raw material is polypropylene, but the production process is different. Among them, the fiber diameter of the spunbond layer on the inner and outer sides is relatively thick, about 20 microns; the diameter of the melt blown layer fiber in the middle is only 2 microns, made of a kind of polypropylene material called high melt index fiber, melt blown non-woven The cloth is fragile and cannot be washed with water or sprayed with alcohol. Even if it is wetted and then dried, it will damage the fiber and cause loopholes. Viruses will pass through the loopholes, and the mask will lose its protective ability.
Disposable meltblown non-woven fabric mask: It is made of a polypropylene material called high-melt index fiber. It is a kind of ultrafine electrostatic fiber cloth, which can effectively use static electricity to absorb virus dust and droplets. This is also a mask that can filter The important cause of the virus. (If you don't know whether your mask can be anti-virus, just see if there is meltblown non-woven fabric in the mask).
Medical masks: generally adopt a multi-layer structure, referred to as SMS structure: single-layer spunbond layer (S) on both sides, and single-layer or multi-layer meltblown layer (M) in the middle. The best material for the meltblown layer is Meltblown non-woven fabric. The main material that brings the virus filtering effect to the mask is the middle M layer-meltblown non-woven fabric.
We wear masks 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 are generally composed of three layers. The upper and lower sides are made of PP non-woven fabric, and the middle is one. The layer is a protective melt-blown non-woven fabric, generally 20 grams weight; while the N95 cup mask is composed of needle punched cotton, melt-blown non-woven fabric, and non-woven fabric. The melt-blown non-woven fabric is usually used The weight of 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%.