Select chemical-resistant medical masks to prepare for: Identify all components of chemical mixtures in the workplace; status and characteristics of chemicals; exposure to chemicals; workplace evaluations Check for damage and aging.
Medical masks Rubber, latex, plastic and other protective medical masks should be cleaned and stored after use, avoid high temperature, and sprinkle talcum powder on the product to prevent adhesion. Insulating medical masks should be used in strict accordance with the instructions, and the electrical insulation performance should be checked regularly.
Injury prevention is a particularly complex issue due to the variety of chemicals encountered. Disinfectants, hydrocarbons, solvents, oils, lipids and acetates have different chemical properties. As a result, each material has different properties and has specific uses, depending on the type of chemicals the medical masks come in contact with
1) Filtration efficiency: under the condition of air flow (85±2) L/min, the filtration efficiency of sodium chloride aerosol with aerodynamic median diameter (0.24±0.06) μm is not less than 95%, which is in line with N95 ( or FFP2) and above. It can block airborne infectious agents with a diameter of <5μm or close contact with infectious agents transmitted by droplets.
2) Inhalation resistance: Under the above flow conditions, the inhalation resistance does not exceed 343.2Pa (35mmH2O).
3) For samples sprayed to the mask under the pressure of 10.9Kpa (80mmHg), technical indicators such as penetration should not appear on the inside of the mask.
4) The mask must be equipped with a nose clip. The nose clip is made of bendable plastic material with a length of >8.5cm.
5) The synthetic blood is sprayed to the mask sample at a pressure of 10.7kPa (80mmHg),
