China is a major producer of masks, producing about 50 percent of the world's masks.Before the year of 2020, the highest daily production of masks in China was more than 20 million.Statistics show that the growth rate of output value of the mask industry in the Chinese mainland increased by more than 10% from 2015 to 2019.In 2019, more than 5 billion masks were produced in the Chinese mainland, with an production value of 10.235 billion RMB.The maximum production rate of masks can be between 120 and 200 pieces per second, but a standard process of analytical disinfection can take from seven days to half a month.Because surgical masks are sterilized with ethylene oxide, after sterilization, there will be ethylene oxide residue in the mask, not only irritates the respiratory tract, but also remains carcinogens.In this way, the residual ethylene oxide must be released by means of analytical method to meet the safety level.
Classification by shape
Masks are divided into three types according to their appearance: flat, folded and cup-shaped.The flat masks are easy to carry, but has poor tightness. Folded masks are easy to carry;Cup-shaped masks have big breathing space, but are not easy to carry.
According to the way of wearing
Headset type: which is suitable for workshop workers, who need to wear it for a long time.
Ear wearing type:which is easy to wear, suitable for wearing and taking off frequently.
Neck wearing type: which has S hook, some soft material connectors, and the connecting ear band is converted into a neck band,that will be suitable for long wear, and it will be more convenient to wear a helmet or protective clothing workshop workers to use.
Classification by the materials
Gauze masks: some workshops still use gauze masks, but it follows the GB19084-2003 standard, which is not in line with the GB2626-2019 standard, and can only protect against large particles of dust.
Non-woven masks: disposable protective masks are mostly non-woven masks, mainly by means of physical filtration supplemented by electrostatic adsorption.
Cloth masks: cloth masks only have the effect of keeping warm without filtering PM particles.
Paper masks: which is suitable for food, beauty and other industries, with good ventilation, easy to use and comfort, which follows GB/T 22927-2008 standard.
Classification by the scope of application
Surgical masks: there are three types in China: ordinary surgical masks, surgical masks and protective surgical masks.
Particulate respirator: it meets the GB 2626-2019 standard for industrial use, and LA certification for special labor protection equipment. In 2015, it changed from compulsory certification to voluntary certification.If the plug type is needed to prevent haze, it should conform to GB/T 32610-2016 standard.Civil compliance with GB/T 32610-2016 standards.
Thermal cloth masks: thermal masks are suitable for winter wearing, only need to meet the relevant standards of fabric.
Other special industries: such as chemical industry.
Other
Respirators can be divided into filter type and isolation type, filter type can be divided into air supply filter type and self-suction filter type, the latter can be divided into half mask and full mask;the isolation type can be divided into the air supply type and the air carrier type, which include positive pressure type and negative pressure type.
