Recently, with the shipment of a batch of expanded polytetrafluoroethylene (e-PTFE) microfiltration membrane flat protective masks produced by China SCZH Scientific Research Institute and Company to Shuguang Hospital, it marks the successful development of SCZH's e-PTFE microfiltration membrane flat protective mask And successfully produced and shipped.
Facing the current shortage of medical protective equipment since Coronavirus (COVID-19) pandemic, SCZH actively responded, relying on its own technological advantages in new fluorine-containing materials, developed a special expanded polytetrafluoroethylene composite mask, which relieved the company's epidemic prevention The tight supply of labor protection masks during the period met the urgent needs of chemical workers for mask protection.
It is understood that the trial-manufactured products meet the labor protection mask standard GB2626-2006. The filter material used in the protective mask is composed of e-PTFE microporous membrane and non-woven fabric through a special process, and the filtration efficiency of the dust with a diameter of 0.3 μm reaches the level of the KN95 mask.
e-PTFE microporous membrane is a kind of microporous film formed by PTFE resin through expansion and stretching. Its micropores are evenly distributed, the pore size is about 100 times smaller than that of melt-blown cloth, and the porosity is as high as 80% or more. Good air permeability and excellent filtration efficiency. Unlike the principle of electrostatic absorption of traditional melt-blown cloth masks, e-PTFE microporous membrane masks use physical barriers, so they have the advantage of being washable multiple times and improving usage. SCZH's e-PTFE microporous membrane mask made of non-perfluorooctanoic PTFE resin has been tested by the national authority. The filtration efficiency reaches 99%, while the exhalation and inhalation resistance are far below the standard limit, which can effectively achieve breathability It has a good effect of filtering PM2.5 and preventing the entry of microorganisms and bacteria into the body.