The haze of masks according to the "new standard" be born daily protection

09:13 on November 5, 2016

Source: People's Daily online - health channel

Qiu dong season, many people will choose to wear masks, prevent mist haze face mask demand, consumers can not help but ask, what kind of face mask in order to better prevent mist haze? On November 1, 2016, the country's first civilian respirators national standard GB/T 32610-2016 "the technical specification for daily protective mask effect (hereinafter referred to as" new GB ").

Intuitive: "protection" replace the filtration efficiency

The provisions of the new national standard on the mask performance using the comprehensive index "protection", to "inhalation of air quality in the body after wearing masks" this visual effect to define the performance of the mask.

New gb before landing, a lot of masks to "filtration efficiency" to represent its anti fog performance, and often claim to be "filtration efficiency above 90%". From the view of the protective performance of masks, the efficiency of filtering is only a single performance index, can not fully reflect the protection ability of masks. Masks protective effect is not only related to the filtration efficiency of materials used, and at the same time with the structure of a mask is very close. Even if the filter's filtering effect can reach 99%, really if seal is not good, mask protection will be discounted.

The great majority on market haze masks are not in accordance with the new standard logo on filtering effect. Will be marked on part of the mask of PM2.5 removal rate and the actual effect does exist. Tests found that nasal air purifier can achieve high filtering efficiency, in addition to the filter material of filtering effect factors, and good facial joint also has a lot to do.

Upgrade: "respiratory resistance" is more demanding

New GB pay more attention to daily life use, GB/T 32610-2016 to filter ability, not just for breathing resistance requirements are more demanding. By contrast, the original respirators standards inspiratory resistance in 350 pa, expiratory resistance in 250 pa is the standard, the new national standard will be numerical fell to 175 pa and pa 145 respectively, can more effectively to ensure the breathing air circulation.

Grade A mask filtering effect is good, but the corresponding inspiratory resistance is big, can't wear for A long time, otherwise may cause damage to the cardiopulmonary function of human body. It also reflects a good performance from the side of respiratory protective equipment, must be a high end product filtering effect, small resistance of breathing, and both, be short of one cannot. Using three-dimensional structure design of nasal air purifier breathable effect is better.

Overall: safety is a important index of testing products

The release of "technical specification for daily protective mask national standards are two key indicators, namely the protective effect of fine particles (PM2.5) and safety performance. Consumers to wear respirators to ensure the security of the standard requires masks should be able to secure a firmly protect mouth and nose, should not be palpable sharp Angle and sharp edges.

Standard also requires that you should not use reworked material, cannot be used with high toxicity, carcinogenicity or potential carcinogenic substances in the material, the residues of other restrictions on the use of the material also should comply with the relevant requirements.

Sorry: children with masks the standard was still white space

In the new national standard made it clear that "does not apply to children use mask", the reason is that children's physical difference is bigger, the data collection difficult. Dedicated to children's mask standards still a distant prospect. Children as a physique weaker group, however, due to the low level of immunity, resistance is weak, skin mucous membrane, including airway, the mucous membrane of the nasal cavity and throat mucosa and tracheal intima, alveolar areas such as the surface is more delicate, so in the fog haze celestial pole vulnerable to harmful substances in the air.

For many consumers say they hope to produce children with masks standards, relevant manufacturer also can produce low resistance and high filtration, model complete masks for children, meet the demand of different age groups.