We usually say that masks are non-woven materials. Non- […]
We usually say that masks are non-woven materials. Non-woven fabrics are non-woven fabrics compared to woven fabrics. They are composed of oriented or random fibers. For masks, all raw materials are polypropylene ( Polypropylene, referred to as PP), medical masks are generally multi-layered structure, generally referred to as SMS structure. The several layers of masks we often talk about are not specified in the national standard GB/T 32610 for masks. If it is a medical mask , It should be at least 3 layers, that is, what we call SMS (2 layers of S and 1 layer of M). At present, the highest number of layers in China is 5 layers, namely SMMMS (2 layers of S layers and 3 layers of M layers). And kn95 How many layers of masks are there?
Cut a regular KN95 mask, you can see that the mask is composed of five layers:
1. The outermost layer is a non-woven fabric with waterproof treatment, which is mainly used to isolate the liquid sprayed by the patient and have the effect of preventing droplets.
2. The second layer is hot-air 100 cotton, which mainly plays the role of heat preservation and heat insulation, moisture and humidity resistance, and improves the comfort of the wearer.
3. The third and fourth layers are two layers of melt blown cloth that have been electret treated. High-quality KN95 masks generally use two layers of melt blown cloth weighing more than 25 grams to ensure that bacterial suspended particles can be basically filtered, which is the most important Core layer.
4. The innermost layer is soft and skin-friendly non-woven fabric, which is not allergic to wear and improves the comfort of the wearer.
What is melt blown cloth:
Meltblown cloth is a kind of polypropylene with high melt index as the material plate. It is a film made of many crisscross fibers stacked in random directions. The fiber diameter ranges from 0.5 to 10 microns, and its fiber weight is about the size of hair One-thirtieth of that. An ordinary medical mask needs about 1g meltblown cloth + 2g spunbond fabric; an N95 mask needs about 3-4g meltblown cloth + 4g spunbond fabric.
Zhejiang Tianzhen Industry & Trade Co,Ltd. is a China dust mask Manufacturers and disposable Face Masks Factory, The production base of Zhejiang Tianzhen Industry & Trade Co, Ltd. is located in Taizhou, Zhejiang. It is an advanced professional dust-proof Chinese PPE manufacturer specialized in producing dust masks. The company is a new and modern enterprise in the sanitary products industry integrating R&D, production and sales. The company has invested in seven high-speed modern face masks production equipment, and the daily output will reach 1 million.