A study showed that when using certain fabrics or adding multiple layers, the effectiveness of homemade masks will increase
wallet? key? mask? This is the psychological assessment that many Spaniards have done before leaving home since June 9, 2020 (the day when the use of masks is mandatory).
Refers to the purpose of something Masks are essential to prevent the spread of COVID-19. Masks protect the people around us by reducing exhaled particulates, and protect ourselves by reducing inhaled particulates.
There are different types of masks, hygiene, surgery, FFP2, and some are even homemade. When all countries face a shortage of protective equipment, the latter is used especially at the beginning of a pandemic.
Masks will not harm the lungs or increase carbon dioxide levels even in patients
Last spring, researchers from the Georgia Institute of Technology’s School of Chemical and Biomolecular Engineering and the School of Earth and Atmospheric Sciences conducted a study to see if all the materials used to make homemade masks are equally protected.magazine Aerosol science and technology published research results Last March.
Throughout the research process, 33 different materials used in the production of masks that anyone can buy in the store were tested. Among the materials analyzed are polyester and cotton fabrics, as well as other non-woven materials such as HEPA filters, vacuum cleaner bags and other cellulose-based products.
The results show that the properties of different materials vary greatly. On the market, you can find materials with acceptable levels of particle rejection and airflow resistance similar to surgical masks. According to this study, the materials with the best performance will be fabrics for blackout curtains and paper and plastic sterilized packaging materials used to wrap surgical supplies.
The researchers also pointed out that the use of HEPA filters and vacuum bags should be avoided. Both materials may contain glass fiber, which is harmful when inhaled by the user. They also advise against wearing loose knitted fabrics such as felt or wool.
Studies have found that the filtration efficiency of masks composed of two or three layers is 50%. It also emphasizes the importance of adjusting the mask in the nose and cheek areas, otherwise particles may escape through these areas.
The person who installs the multi-layer mask correctly can avoid 84% of the particles in the pension, and if two people use them correctly, the transmittance of the particles will be reduced by 96%.