CN111387607A

CN111387607A - N95 gauze mask that can wash used repeatedly

Info

Publication number: CN111387607A
Application number: CN202010322243.2A
Authority: CN
Inventors: 贺伟林; 汤夏夏
Original assignee: Hunan Yongfei Medical Equipment Co ltd
Current assignee: Hunan Yongfei Medical Equipment Co ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-07-10

Abstract

The invention discloses a water-washable reusable N95 mask, which comprises a mask body, wherein the mask body comprises a polyimide nano aerogel membrane filter layer, two non-woven fabric layers and two surface layer fabrics, the two non-woven fabric layers are respectively overlapped on two sides of the polyimide nano aerogel membrane filter layer, the two surface layer fabrics are respectively overlapped on one side, opposite to the polyimide nano aerogel membrane filter layer, of the two non-woven fabric layers, and the edges of the polyimide nano aerogel membrane filter layer, the non-woven fabric layers and the surface layer fabrics are sewn into a whole. This N95 gauze mask that can wash used repeatedly not only has good safeguard function, can wash repeatedly moreover, used repeatedly, has stable barrier propterty after washing repeatedly to its resistance of breathing in and expiration resistance are all less, and filtration efficiency is high.

Description

N95 gauze mask that can wash used repeatedly

Technical Field

The invention relates to the technical field of masks, in particular to an N95 mask capable of being repeatedly used by water washing.

Background

With the spread of new coronavirus epidemic situation, the mask becomes a scarce resource, and through gradual reproduction and energy expansion, the daily yield of the mask reaches 1.16 hundred million in China by 2 months in 2020, thus relieving the contradiction between supply and demand of the mask to a certain extent, but the gap is still large. With the global accelerated spread of epidemic situations, the demand for masks has further increased, and a situation of 'one mask is difficult to demand' has appeared. In addition, with the primary control of the epidemic situation in China, the potential of the compound production is in force, the daily demand of only part of China during the compound production reaches about 2.38 hundred million by calculating according to 1 mask required by each person per day, the daily demand of the complete compound production exceeds 5.33 hundred million, and the daily demand of the comprehensive compound production and the compound school exceeds 8 hundred million.

The common protective mask on the market is mostly non-woven fabric + melt-blown cloth, can not bump water, can not spout alcohol, and the frequency of use change is too fast, causes very big waste. At present, the global supply of melt-blown non-woven fabrics is very tight, the further increase of the mask yield is greatly limited, and the existing masks with the virus protection function can not be repeatedly sterilized. In order to alleviate the situation of the supply tension of the mask, it is imperative to develop and produce masks with virus protection function which can be repeatedly killed and used repeatedly.

Disclosure of Invention

The invention mainly aims to provide a water-washable reusable N95 mask, wherein the N95 mask is high in filtering efficiency, good in protection effect, small in air suction and exhalation resistance and washable and reusable.

In order to achieve the purpose, the invention provides a water-washable reusable N95 mask, which comprises a mask body, wherein the mask body comprises a polyimide nano aerogel membrane filter layer, two non-woven fabric layers and two surface layer fabrics, the two non-woven fabric layers are respectively overlapped on two sides of the polyimide nano aerogel membrane filter layer, the two surface layer fabrics are respectively overlapped on one side, opposite to the polyimide nano aerogel membrane filter layer, of the two non-woven fabric layers, and the edges of the polyimide nano aerogel membrane filter layer, the non-woven fabric layers and the surface layer fabrics are sewn into a whole.

Furthermore, the thickness of the polyimide nano aerogel membrane filtering layer is 38-42 μm, the porosity is 90.55-90.59%, and the pore diameter is 2.75-2.81 μm.

Furthermore, both sides of the mask body are connected with elastic ear hooks, and ear hook adjusting buckles used for adjusting the length of the elastic ear hooks are sleeved on the elastic ear hooks.

Furthermore, the upper part of the outer side surface of the mask body is provided with a sewing pleat, the lower part of the outer side surface of the mask body is provided with a movable pleat, and the upper part and the lower part of the inner side surface of the mask body are both provided with an inner movable pleat.

Furthermore, a built-in metal nose bridge frame is arranged on the upper edge of the mask body.

By applying the technical scheme of the invention, the polyimide nano aerogel membrane filter layer is used as the core filter layer of the mask, compared with the existing protective mask which adopts melt-blown cloth as the core filter layer, the mask provided by the invention not only has a good protective function, but also can be repeatedly washed and reused, has stable protective performance after being repeatedly washed, and has small inspiration resistance and expiration resistance and high filtering efficiency.

The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of the outer side structure of the mask according to the embodiment of the present invention.

Fig. 2 is a schematic view of the inner side of the mask according to the embodiment of the present invention.

Fig. 3 is a schematic view showing the stacking of layers in the mask body of the mask according to the embodiment of the present invention.

Wherein the figures include the following reference numerals:

1. a mask body; 2. elastic ear hanging; 3. an ear hanging adjusting buckle; 11. a polyimide nano aerogel membrane filtration layer; 12. a non-woven fabric layer; 13. surface cloth; 14. sewing and folding; 15. performing live folding; 16. an inner pleat; 17. a metal bridge.

Detailed Description

In order to facilitate an understanding of the invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The use of the words "a" or "an" and the like in the description and claims of the present patent application do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" and "coupled" and the like are not restricted to direct connections, but may be indirectly connected through other intermediate connections. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.

Referring to fig. 1 to 3, a reusable N95 mask with water washing according to an embodiment of the present invention, the N95 mask mainly includes a mask body 1 and elastic ear loops 2. Wherein, gauze mask body 1 includes polyimide nanometer aerogel membrane filter layer 11, two-layer non-woven fabrics layer 12 and two-layer surface course cloth 13, two-layer non-woven fabrics layer 12 is folded respectively and is established the two sides at polyimide nanometer aerogel membrane filter layer 11, two-layer surface course cloth 13 is folded respectively and is established the one side relative at two-layer non-woven fabrics layer 12 and polyimide nanometer aerogel membrane filter layer 11, foretell polyimide nanometer aerogel membrane filter layer 11, the edge of non-woven fabrics layer 12 and surface course cloth 13 is sewed up and is formed holistic gauze mask body 1, elasticity ear-hang 2 is connected in the both sides of gauze mask body 1.

According to the N95 mask capable of being washed and reused, the polyimide nano aerogel membrane filter layer 11 is used as the core filter layer of the mask, and compared with the existing protective mask which adopts melt-blown cloth as the core filter layer, the mask provided by the invention not only has a good protective function, but also can be washed and reused repeatedly, has stable protective performance after being washed repeatedly, and is small in inhalation resistance and exhalation resistance and high in filtering efficiency.

Specifically, the thickness of the polyimide nano aerogel membrane filtration layer 11 is preferably 38 μm to 42 μm, the porosity is preferably 90.55% to 90.59%, and the pore size is preferably 2.75 μm to 2.81 μm. In this example, the thickness was 40 μm, the porosity was 90.57%, and the pore diameter was 2.78. mu.m.

Referring to fig. 1 and 2, in this embodiment, an elastic ear hook 2 is connected to both sides of the mask body 1, and an ear hook adjusting buckle 3 for adjusting the length of the elastic ear hook 2 is sleeved on the elastic ear hook 2. The wearing length of the elastic ear hook 2 can be conveniently adjusted by changing the position of the ear hook adjusting buckle 3 on the elastic ear hook 2 so as to adapt to users of different ages.

Referring to fig. 1 and 2, in the present embodiment, a sewing pleat 14 is provided on an upper portion of an outer side surface of the mask body 1, a tuck 15 is provided on a lower portion of the outer side surface of the mask body 1, and an inner tuck 16 is provided on both upper and lower portions of the inner side surface of the mask body 1. With the arrangement, the sewing pleat 14 at the upper part of the outer side surface, the pleat 15 at the lower part of the outer side surface and the inner pleat 16 at the upper part and the lower part of the inner side surface support the inner space of the mask together, which is beneficial to ensuring that the mask has larger breathing space for users. The lower part of the mask body 1 is folded inwards to be tightly attached to the radian of the chin; the two sides of the mask body 1 are narrow and tightly attached to the cheeks, so that the mask plays a role in sealing. Further, a metal bridge 17 is provided inside the mask body 1 at the upper edge thereof. Make the last edge of gauze mask body 1 can laminate user's the bridge of the nose better, and the driving fit gauze mask is whole better.

The performance of the washable reusable mask is detected by a third-party detection mechanism according to GB/T32610-. The main detection items are the inhalation resistance, the exhalation resistance, the filtration efficiency and the protection effect of the mask, and the filtration effect, the exhalation resistance and the inhalation resistance after multiple times of washing.

The detection shows that the inhalation resistance of the mask under the conditions of no pretreatment and pretreatment is less than 175Pa, and the exhalation resistance of the mask under the conditions of no pretreatment and pretreatment is less than 145Pa, so that the mask meets the standard technical requirements. The saline filtration efficiency of the mask is 91.5%, the oily filtration efficiency is 84.0%, and the technical requirements of III-grade filtration efficiency (the saline is more than or equal to 90%, and the oily is less than or equal to 80%) are met. The mask has a salt protection effect of 68.9% and an oily protection effect of 65.9%, and meets the technical requirement of D-level protection effect (not less than 65%).

After 30 times of washing, the breathing resistance of the mask under the conditions of no pretreatment and pretreatment is less than 175Pa, and the breathing resistance of the mask under the conditions of no pretreatment and pretreatment is less than 145Pa, so that the mask meets the standard technical requirements. After 30 times of washing, the salt filtering efficiency of the mask is 95.3 percent, the oil filtering efficiency is 86.3 percent, and the III-grade filtering efficiency is achieved. The washing mode is GB/T8629-2017, and the washing program is 4H.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a N95 gauze mask that can wash used repeatedly, includes gauze mask body (1), its characterized in that, gauze mask body (1) includes polyimide nanometer aerogel membrane filter layer (11), two-layer non-woven fabrics layer (12) and two-layer surface course cloth (13), and is two-layer non-woven fabrics layer (12) are folded respectively and are established the two sides of polyimide nanometer aerogel membrane filter layer (11), and are two-layer surface course cloth (13) are folded respectively and are established two-layerly non-woven fabrics layer (12) with the one side that polyimide nanometer aerogel membrane filter layer (11) is relative, polyimide nanometer aerogel membrane filter layer (11) non-woven fabrics layer (12) with the edge of surface course cloth (13) is sewed up and is formed wholly.

2. A water washable reusable N95 mask according to claim 1, wherein the thickness of the polyimide nano aerogel membrane filter layer (11) is 38-42 μm, the porosity is 90.55-90.59%, and the pore size is 2.75-2.81 μm.

3. The N95 gauze mask capable of being washed repeatedly with water according to claim 1, wherein an elastic ear hook (2) is connected to both sides of the mask body (1), and an ear hook adjusting buckle (3) for adjusting the length of the elastic ear hook (2) is sleeved on the elastic ear hook (2).

4. A reusable N95 gauze mask capable of being washed with water according to claim 1, wherein the upper part of the outer side of the gauze mask body (1) is provided with a sewing pleat (14), the lower part of the outer side of the gauze mask body (1) is provided with a movable pleat (15), and the upper part and the lower part of the inner side of the gauze mask body (1) are provided with inner movable pleats (16).

5. A reusable N95 gauze mask capable of being washed with water according to any one of claims 1-4, characterized in that the upper edge of the mask body (1) is provided with a built-in metal nose bridge (17).