Three-dimensional flaky folding low-pressure mask

Abstract

The invention discloses a three-dimensional flaky folding low-pressure mask, which comprises a face mask formed by at least one layer of filtering sheet. A folding part is arranged on the face mask. The three-dimensional flaky folding low-pressure mask is characterized in that the folding part is provided with a linear folding mark, fold line folding marks and drape folding marks; the face mask is forwards folded along the linear folding mark and is then reversely folded back along the fold line folding marks; the fold line folding marks are formed by two line segments through end-to-end connection; the drape folding marks are formed by distributing fold line folding marks on the reversely folded face mask through starting from the vertexes; the number of the drape folding marks starting from the vertex of each fold line folding mark is more than two; the drapes are flattened through the folding along the drape folding marks; each folded layer is in a flat flake folding state; after the folding, the periphery edge of the face mask is bonded; in the use process, the folding parts are unfolded, an outwards projected space can be formed at the vertex of the fold line folding marks; the form is stable; the airflow is smooth; the filtering efficiency of each position of the filtering sheet can be achieved in a balanced way; and the integral filtering effect is improved.

Description

technical field [0001] The invention relates to a mask, in particular to a three-dimensional piece folded low-pressure mask. Background technique [0002] With the improvement of people's health awareness, masks have been used as a protective tool in various fields of our lives, such as medical treatment, chemical industry, furniture manufacturing and other industries. Today, we have to wear masks to travel when the environment is polluted in the process of industrialization To avoid smog damage, the main function of these masks is to isolate and filter microparticles and viruses, so as to avoid direct inhalation of microparticles and viruses into the lungs and cause negative effects on personal health. There are many kinds of existing masks, and the most commonly used ones are still low-cost folded sheet masks, which are composed of several layers of filter sheets stacked on top of each other. Just open it, because the length of each fold in the horizontal direction is equ...

AI Technical Summary

Problems solved by technology

There are many kinds of existing masks, and the most commonly used ones are still low-cost folded sheet masks, which are composed of several layers of filter sheets stacked on top of each other. Just open it, because the length of each fold in the horizontal direction is equal to the horizontal length of the upper and lower edges of the filter, and the folded length cannot be adjusted, so it is limited by it and cannot obtain a larger depth space; Pull down the upper edge of the filter and the horizontal folds tend to be tight, which will make the horizontal folds closer to or press on the nose and mouth. Since the filter is pressed on the nose and mouth, the space between the nose and the nose is narrow, resulting in poor filtration The pressure difference between the inside and outside of the filter facing the mouth and nose is higher than that away from the mouth and nose. The unbalanced pressure distribution makes the air flow and dust accumulation in different parts of the filter different, causing the filter to not be able to play its filtering performance in a balanced manner. The position directly facing the mouth and nose has high pressure difference between inside and outside, high flow rate, and a lot of dust accumulation, which greatly increases the penetration probability of micro particles on the filter facing the mouth and nose under the high-speed airflow; in addition, the shape and structure stability of the filter is poor, and the distance from the mouth and nose The closeness makes the airflow have a greater impact on the filter when breathing, and the vibration deformation will also increase the probability of particle penetration. When inhaling, the filter will be closer to the nostril under the action of suction, resulting in a higher pressure difference between the inside and outside of the nostril; the horizontal fold is tight In the tense state, the contact area between the filter and the face will be increased, and the effective filtering area of ​​the filter will be reduced, which will cause the feeling of suffocation due to poor air flow, especially when the micropores are shrunk very small to improve the filtering effect, the suffocation phenomenon is more obvious ; Moreover, the tightness of the upper edge will also cause gaps between the upper edge of the filter and the alar socket, causing dust to enter the inside of the mask from the gap during inhalation and affect the filtering effect. These problems still need to be improved and perfected.

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