Disposable bathing bags are excellent in workmanship, easy to tear, and not easy to tear. They can be repeatedly rubbed off without flocculation. Even if they are disposable, they should be comfortable and contain no migratory fluorescent natural materials. They contain no toxic substances. The baby can rest assured that the mesh is dense, blister, rich and large, the mesh is fine, and the bubbles are rich and delicate. 1) filtration efficiency: under the condition of air flow rate of (85 ± 2) l / min, the filtration efficiency of sodium chloride aerosol with aerodynamic median diameter of (0.24 ± 0.06) μ m is not less than 95%, which is in line with N95 (or FFP2) and above. It can block the air borne infectious factors with diameter less than 5 μ m or contact with the infectious factors transmitted by droplets in close contact. 2) Inspiratory resistance: under the above flow conditions, the inspiratory resistance does not exceed 343.2pa (35mmh2o). 3) When the sample is sprayed to the mask under the pressure of 10.9kpa (80mmHg), the inner side of the mask should not show any technical indicators such as penetration. 4) The mask must be equipped with a nose clip, which is made of bendable plastic material with a length of more than 8.5cm. 5) The synthetic blood was sprayed to the mask sample at the pressure of 10.7kpa (80mmHg), and the inner side of the mask should not be penetrated. 2. The medical surgical mask is suitable for the basic protection of medical personnel or related personnel, as well as the protection to prevent the spread of blood, body fluid and spatter in the process of invasive operation, with medium protection level and certain respiratory protection performance. It is mainly used in clean environment with cleanliness level less than 100000, operating room work, nursing patients with low immune function and body cavity puncture. Medical surgical masks can block most of the bacteria and some viruses, prevent the medical staff from being infected, and can also prevent the medical staff from directly discharging the microorganisms in their breath, which poses a threat to the patients undergoing surgery. Medical surgical masks are required to filter bacteria more than 95%. Disposable medical surgical masks should also be provided to suspected respiratory tract patients to prevent infection threat to other hospital personnel and reduce the risk of cross infection, but the effect of avoiding infection is not as effective as medical protective masks. [4] According to yy0469-2004 "technical requirements for medical surgical masks", the important technical indicators include filtration efficiency, bacterial filtration efficiency and respiratory resistance. The specific indexes are as follows: 1) filtration efficiency: under the condition of air flow rate of (30 ± 2) l / min, the filtration efficiency of sodium chloride aerosol with aerodynamic median diameter of (0.24 ± 0.06) μ m is not less than 30%. 2) The filtration efficiency of bacteria should not be lower than 3% for Staphylococcus aureus and 0.95% for Staphylococcus aureus. 3) Respiratory resistance: under the condition of filtration efficiency flow, the inspiratory resistance is not more than 49 PA, and the expiratory resistance is not more than 29.4 PA. When the pressure difference △ p between the two sides of the mask for gas exchange is 49pa / cm, the gas flow rate should be ≥ 264mm / s. 4) Nose clip and mask belt: the mask should be equipped with a nose clip. The nose clip should be made of plastic material, and the length of nose clip should be more than 8.0 cm. The respirator Belt should be easy to wear and take, and the breaking strength at the connection point between each mask belt and the mask body should be greater than 10N. 5) Penetration of synthetic blood: after 2ml of synthetic blood is sprayed at the pressure of 16.0kpa (120mmhg) to the outer side of the mask, there should be no penetration on the inner surface of the mask. 6) Flame retardant performance: the mask material should be non flammable material, and the mask should burn for less than 5S after leaving the flame. 7) Ethylene oxide residue: the residual amount of ethylene oxide in the mask sterilized by ethylene oxide should be less than 10 μ g / g. 8) Skin irritation: the primary irritation index of mask material should be ≤ 0.4, and there should be no allergic reaction. 9) Microbiological index: the total number of bacterial colonies is less than or equal to 20 CFU / g, coliform bacteria, Pseudomonas aeruginosa, Staphylococcus aureus, hemolytic streptococcus and fungi shall not be detected. [5] 3. General medical mask the ordinary medical mask is used to block the spatter from the mouth and nasal cavity, and can be used for one-time health care in the general medical environment, with low protection level. It is suitable for general health care activities, such as cleaning, dispensing, cleaning bed unit, etc., or pathogenicity

Isolation or protection of particles other than microorganisms such as flower powder.