EN 149 is the European standard for testing and marking of half-face filters. Such masks cover the nose, mouth and chin and may have breathing valves and / or exhalations. Such filter filters breathe protection from the inhalation of particles such as dust particles, droplets, and aerosols.
EN-149: 2001 - breathing apparatus that meets the requirements of EN-149: 2001 is designed to protect solid foods, water-based aerosols and oil-based aerosols. There are three categories of detailed protection in EN-149: 2001 - FFP1, FFP2 & FFP3 and filter facepieces are classified according to filter function.
In an earlier version of the EN-149 standard, respirators were tested only for air aerosols, while in the final, solid and liquid form were tested for all aerosols. Moreover, while the face was divided into five sections in the previous version, of the last update, the half mask was divided into three groups: FFP1, FFP2 and FFP3 according to the filtering volume. The higher the number, the higher the level of protection:
FFP1 filters (factor factor 4) filter at least 78 percent of particles in the air. This mask is enough to protect against irritation only. However, its use in hazardous substances is not considered appropriate.
FFP2 filters (factor factor 10) filter for at least 92 percent of airborne particles. It provides protection from strong and irritating aerosols.
FFP3 filters (factor factor 20) filter at least 98 particles in the air. It provides protection from solid and toxic aerosols.
Masks that meet EN-149 standard requirements are designed to protect against solids, water-based aerosols and oil-based aerosols. The standard in question has been amended in accordance with the personal protection order 89/686 / EEC published in the European Union and the necessary updates have been made in due course.
For some respirators, an additional reference is used along with the FFP code. If the mask has the letter D, it is understandable that this mask passes the dolomite test, that is, it is more resistant to closure over time.
Currently, many contraceptive methods such as ethylene oxide, formalin, ultraviolet ray, bleach and hydrogen peroxide are being considered for reuse of respiratory masks. However, these methods have some drawbacks such as the destruction of the work and the reproduction of toxic residues and their use is limited. For example, autoclave, 95 degree dry heat, 160% isopropanol, N70 respiratory soap and water reduce the efficiency of filtering.
However, research continues to reduce the amount of hazardous waste and the risks that arise. Likewise, technical studies continue to find the safest and most effective breathing protection. Research has been done to improve the efficiency of screening and to improve the efficiency of respiratory protection devices without providing respiration. For example, in the production of masks, nanofibers are used and charged for electricity. However, there are technical issues. Therefore, the design and implementation of a filter that does not satisfy the accumulated germs will provide significant improvements to existing active and respiratory masks, increase protective function, reduce the risk of infection and regenerate without diminishing.
The key components of today's breath-taking technology are efficiency of filtering, comfort and balance. Each of these plays an important role in protective function and certain levels are developed to improve themselves.
In terms of filtering efficiency, the N95 respirators are 95 percent efficient for filtering efficiency. In contrast, a surgical mask has lower performance. A few key parameters that need to be controlled to reduce particle penetration are: reducing the width of the wires, reducing the size of the filter holes, controlling the amount of electrical cord through the production and selection process, and increasing the size of the filters.
The idea of comfort for the wearer is very important for proper use and effective protection. Tolerable comfort parameters during application of the mask can be listed as follows: shortness of breath due to decreased pressure, decreased air exchange during breathing and heat production on the face, heat production within the mask, exhaust carbon dioxide emissions, discomfort caused by prolonged skin contact and difficulty in communication. .
The consistency that reduces the performance of the mask is related to the balance of the mask. The untreated air between the mask and the face is a major problem. To prevent this, it is important to choose the shape of the mask and mark the elements that are appropriate for the shape of the human body.
Within the framework of laboratory testing services, our organization also provides respiratory mask testing services that protect half of EN 149.
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