Three-dimensional piece folding low pressure mask

Abstract

The invention discloses a three-dimensional sheet-type folded low-pressure mask, which comprises a mask composed of at least one layer of filter sheets. Fold forward along the straight line crease and then reversely fold back along the crease line crease. The crease line crease is composed of at least two line segments connected end to end. There are more than two creases starting from the vertex of a crease line. Fold along the creases to smooth out the creases. After folding, each layer is stacked in a flat sheet. After folding, the edges of the mask are glued around, and it is unfolded when used. An outward protrusion space can be formed at the top of the crease of the fold line, the shape is stable, the airflow is smooth, and the filtration efficiency of each part of the filter sheet can be balanced, which improves the overall filtration effect.

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 ; and the tightness of the upper edge will also cause gaps between the upper edge of the filter sheet and the alar fossa, causing dust to enter the inside of the mask from the gap to affect the filtering effect when inhaling. Chinese patent document CN104000319A is the closest to the prior art of the present invention. Still need to improve the technology to improve

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