2020年初，新冠肺炎肆虐全球，口罩从普通的防霾防菌用品已经上升到了这场抗疫过程中不可缺少的物资，于是市场上出现了各种型号各种标准的口罩，今天给大家介绍一下口罩中最重要的材料-熔喷布。
In early 2020, the epidemic raged all over the world, and masks rose from ordinary anti-haze and anti-bacterial supplies to indispensable materials in this anti-epidemic process, so various models and various standard masks appeared on the market.The most important material-meltblown cloth.
Masks are usually composed of three layers of materials: two layers of fiber nonwoven fabrics used professionally for medical and health; the melt-blown fabric is located in the middle layer, which is mainly used to isolate bacteria or viruses, and is the most important part of the mask.
The structure of the meltblown fabric is dense and the color is white.The structure of the cloth is relatively loose and the transparency is high.There is also a slight difference in the strength of the two fabrics: the melt-blown fabric has low strength and can be torn by hand; the non-woven fabric has high strength and requires a lot of force to tear; the melt-blown fabric is divided into 90 grades, 95 grades and 99.Class 99, which is the strongest adsorption effect, including children's mask meltblown cloth is also used in class 99.
Then let's introduce the raw material of melt-blown cloth: polypropylene (PP).This kind of melt-blown cloth needs to be produced with special melt-blown polypropylene. Due to the shortage of this kind of melt-blown cloth, the price has risen sharply, so some small workshops have begun to produce inferior melt-blown cloth by the method of mixed fiber drawing masks, this mask is not only of poor quality, but also has a poor filtering effect.
根据口罩依靠静电吸附来防止病毒的原理，具有静电吸附的口罩是合格的。如下是99级熔喷布口罩的静电吸附效果展示.According to the principle that masks rely on electrostatic adsorption to prevent viruses, masks with electrostatic adsorption are qualified.The following is a demonstration of the electrostatic absorption effect of a 99-level meltblown cloth mask.