CN111296933A

CN111296933A - Protective mask with self-cleaning function

Info

Publication number: CN111296933A
Application number: CN202010176405.6A
Authority: CN
Inventors: 赵国平; 王林狮; 尉伟华; 武旭光; 孙建东; 李键; 张丽霞
Original assignee: Shanxi Xinhua Chemical Industry Co Ltd
Current assignee: Shanxi Xinhua Chemical Industry Co Ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-06-19

Abstract

The invention discloses a protective mask with a self-cleaning function, which comprises a mask main body (1), ear bands (2) and a built-in nose clip (3); the mask main body (1) consists of an inner layer (11), a middle layer (12) and an outer layer (13); the inner layer (11) is a non-woven fabric layer; the middle layer (12) is a modified filtering layer, namely a charged nanofiber melt-blown filtering material is adopted, and a halogen disinfectant is sprayed on the surface of the filtering material and then dried; the outer layer (13) is three layers of mesh cloth. The protective mask with the self-cleaning function has the advantages of reasonable design, high efficiency, low resistance, comfortable wearing, small leakage rate and good practical application value.

Description

Protective mask with self-cleaning function

Technical Field

The invention relates to the technical field of traditional protective articles, in particular to a protective mask with a self-cleaning function.

Background

The filtering material used by the traditional mask in the market at present belongs to passive barrier protection for filtering target pollutants, has no self-cleaning function for harmful aerosol particles trapped on the surface layer of the material, influences the service performance and the period of the material or the product to a certain extent, and cannot meet different requirements of people. In addition, different structures are adopted for manufacturing the mask, and certain influence is also brought to the comfort performance.

Therefore, the protective mask with the composite structure, the simple structure and the self-cleaning function is applied to emergency protective equipment, and is very important for personal protection.

Disclosure of Invention

The invention aims to provide a protective mask with a simple composite structure and a self-cleaning function, which is characterized in that according to a porous structure formed by interweaving fine and soft fibers of a filtering material in a staggered manner, harmful aerosol is filtered and purified by coating or grafting active substances with eliminating capacity on the surface layer of a nanofiber filtering material, and secondary pollution caused by use is reduced.

The invention is realized by adopting the following technical scheme:

a protective mask with self-cleaning function comprises a mask body, ear bands and a built-in nose clip; the mask main body consists of an inner layer, a middle layer and an outer layer; the inner layer is a non-woven fabric layer; the middle layer is a modified filtering layer, namely a charged nanofiber melt-blown filtering material is adopted, and a halogen disinfectant is sprayed on the surface of the filtering material and then dried; the outer layer is three layers of mesh cloth.

People generally wear the mask to mainly prevent the transmission of spray in the air and fine particulate matters (such as PM2.5, dust, pathogenic microorganisms and the like) suspended in the air, and the mask is mainly disposable. The invention provides new requirements for the functions of the materials, the use occasions are not limited to one-time use any more, the materials can be used for many times without forming secondary pollution, and the core filter materials are required to have self-disinfection and self-cleaning functions to a certain extent on the basis of achieving the purposes of protection and purification.

The protective mask disclosed by the invention adopts a charged nanofiber melt-blown filter material, is in a porous structure formed by interweaving fine and soft fibers of the filter material in an intricate manner, and is based on a certain chemical reaction elimination principle, the filtering and purification of harmful aerosol are realized by coating or grafting active substances with elimination capacity on the surface layer of the nanofiber filter material, the secondary pollution formed by multiple use is reduced, a certain self-disinfection and self-cleaning function is achieved, and the service life of the mask is effectively prolonged (the mask can be worn repeatedly).

During the preparation, protective facial mask designs according to the different types of face characteristics of chinese, includes: the mask comprises a mask body, ear bands and a built-in nose clip. The mask main body is of a three-dimensional structure, can be folded, is not provided with an expiratory valve, and is combined with the ear belt part into a whole. The mask body consists of an inner layer, a middle layer and an outer layer. The inner layer is non-woven fabric, the middle layer is a modified filter layer (which can be compounded in multiple layers as required) and the outer layer is three layers of mesh cloth (or non-woven fabric and three layers of mesh cloth); when sewing, the inner non-woven fabric and the middle filter layer are compounded into a whole. The nose and the lower jaw of the protective mask main body are designed in an arc-shaped structure, the built-in nose clip is clamped in the middle of the upper part of the mask, the nose clip is bent and adjusted according to the current situation of the nose bridge of a user, and the periphery of the protective mask main body is tightly closed by elastic edge-covering elastic materials. The protective mask adopts the modified filtering material, so that the protective performance of the protective mask on non-oily particles and pathogenic microorganisms with the diameter larger than 0.3 mu m suspended in the air can be improved, and the filtering efficiency is over 95 percent. Moreover, the filter material belongs to a charged filter material, and has the advantages of high efficiency, low resistance, good comfort and good air permeability.

The invention has the following main advantages:

1. has self-cleaning function. The mask middle layer filtering material is a charged nanofiber melt-blown filtering material, has a net-shaped porous structure, bears or is grafted with active substances with eliminating capacity through a filtering material base material, can filter and purify toxic and harmful aerosol in the air, achieves the self-cleaning purpose, and is suitable for being used in personal emergency places.

2. The mask has a three-dimensional structure. The inner layer is non-woven fabric, the middle layer is a modified nano-fiber filtering material layer, and the outer layer is three-layer mesh polyester fabric. The middle-layer filter element and the inner-layer non-woven fabric are sewn by a sewing method and then are compounded with the outer layer, so that the integrity is good, and the filtering efficiency is high.

3. The wearing is comfortable. Without an exhalation valve, the resistance is small.

The protective mask with the self-cleaning function has the advantages of reasonable design, high efficiency, low resistance, comfortable wearing, small leakage rate and good practical application value.

Drawings

Fig. 1 shows a schematic view of the mask structure.

Fig. 2 is a schematic view showing the distribution of the mask body.

In the figure: 1-mask body, 2-ear band, 3-built-in nose clip, 11-inner layer, 12-middle layer and 13-outer layer.

Detailed Description

The following detailed description of specific embodiments of the invention refers to the accompanying drawings.

A protective mask with self-cleaning function is shown in figure 1, and comprises a mask body 1, ear bands 2 and a built-in nose clip 3. As shown in fig. 2, the mask body 1 is composed of an inner layer 11, an intermediate layer 12 and an outer layer 13. The inner layer 11 is a non-woven fabric layer; the middle layer 12 is a modified filtering layer, namely a charged nanofiber melt-blown filtering material is adopted, and a halogen disinfectant is sprayed on the surface of the filtering material and then dried; the outer layer 13 is three layers of mesh cloth.

The halogen disinfectant comprises the following components in percentage by weight:

the halogen disinfectant is as follows: chloramine (NH)₂Cl, colorless solid crystals), chloramine T (sodium p-toluenesulfonamide, white powder), or sodium dichloroisocyanurate (NaDCC, white crystals). The configuration process comprises the following steps: a. proportionally mixing the water solution in a containerAdding a disinfectant, such as chloramine, chloramine-T, or sodium dichloroisocyanurate; the concentration is generally controlled to be between 2% and 50% (preferably 10% to 15%); b. stirring and diluting by using a stirring rod to prepare disinfectant with corresponding concentration; c. the disinfectant is usually stored hermetically under dry conditions.

The halogen disinfectant is sprayed on the surface of the filter material and the drying process is as follows:

1) preparing disinfectants used in a spraying room, and preparing corresponding protective equipment according to spraying safety technical regulations; opening air supply and exhaust systems of the spraying chamber and the drying chamber;

2) uniformly spreading the filter material, and putting the prepared halogen disinfectant into a special spraying device; after the trial spraying is qualified, spraying treatment is carried out section by section, and the spraying atomization pressure is 0.2 MPa-0.3 MPa; about 50-100 g of halogen disinfectant is required to be sprayed on each square meter of filter material.

3) And drying the sprayed filtering material, wherein the temperature of a drying chamber is not higher than 40 ℃ or drying by natural ventilation.

The process can also be carried out by dipping and drying, and the main purpose is to uniformly coat the disinfection components on the filter material.

The protective mask with the self-cleaning function is characterized in that a charged nanofiber melt-blown filter material is adopted in a core middle layer, on the basis of a certain chemical reaction elimination principle, on the premise of ensuring the set resistance and the filter efficiency, according to a porous structure formed by interweaving fine and soft fibers of the filter material in an intricate mode, on the basis of a certain chemical reaction elimination principle, a halogen disinfectant coating prepared by spraying is sprayed on the surface of the nanofiber filter material, active substances with elimination capacity are formed on the surface of the nanofiber filter material after drying, and when harmful aerosol in the air falls onto the surface of the mask filter material, the disinfection effect of the halogen on the surface of the filter material is achieved by slowly releasing hypochlorous acid. Such as aerosols and water contained in the air and chloramine (NH)₂Cl) to generate monochloramine, etc., and can make nucleic acid be denatured by penetrating cell membrane to prevent protein from being synthesized, and said reaction can be made reversible, and possesses the bactericidal oxidation action to filter toxic and harmful aerosol and purify airThereby achieving certain self-disinfection and self-cleaning functions and reducing secondary pollution formed after multiple use.

During specific preparation, the nose part and the lower jaw part of the mask main body are designed in an arc-shaped structure and comprise an inner layer, a middle layer and an outer layer, the inner layer is made of non-woven fabrics, the middle layer is a modified nanofiber filter material layer, the outer layer is made of three layers of terylene eyelet fabrics, the appearance structures of the inner layer and the middle layer are the same, the upper arc part and the lower arc part of the inner layer and the middle layer are compounded by sewing threads after being folded left and right, a middle layer filter element and the inner layer non-woven fabrics are sewn by a sewing method and then compounded with the outer layer, the integrity is good, and the. The outer layer is similar to the inner layer in shape and structure, the upper arc part and the lower arc part of the outer layer are sewn by sewing threads after the outer surface of the outer layer is folded inwards, leftwards and rightwards, the outer edges of the inner layer, the middle layer and the outer layer are firstly wrapped and sewn by wrapping elastic bands at the left side and the right side, and then are sequentially wrapped and sewn up and down; the built-in nose clip is fixedly sewed by penetrating the nose clip into the middle part between the outer layer and the wrapping elastic band in the process of sewing the upper edge of the edge wrapping, and the ear band is sewed after the elastic edge wrapping elastic band is folded in half and is integrated with the elastic bands at the upper and lower outer edges of the mask.

This structure protective mask nasal part, jaw portion adopt the spatial structure that the camber line design formed than linear type structure more humanized, and the peripheral elastic cord cladding that adopts elasticity to bordure of gauze mask main part is sewed up, sews compound gauze mask, does not adopt the peculiar smell that ultrasonic bonding produced, and the leakproofness is good, and total leakage rate is less than 2%. Ear area and gauze mask main part formula as an organic whole are compound, combine more firmly than traditional gauze mask, are more than 2 times of the powerful index of current gauze mask, and the reliability is better, can guarantee to wear that the back nasal part is better, more comfortable. Moreover, the mask adopts the modified filtering material, so that the transmission of spray in the air and fine particles (such as PM2.5, dust, pathogenic microorganisms and the like) suspended in the air can be blocked, and the filtering efficiency is over 95 percent. Moreover, the sterilization number of the bacterial colony number of the staphylococcus albus is judged by the modified filter material, and the self-cleaning of the existing mask to the staphylococcus albus can reach 95% after 2 hours.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention.

Claims

1. A protective mask with a self-cleaning function comprises a mask body (1), ear bands (2) and a built-in nose clip (3); the mask main body (1) consists of an inner layer (11), a middle layer (12) and an outer layer (13);

the method is characterized in that: the inner layer (11) is a non-woven fabric layer;

the middle layer (12) is a modified filtering layer, namely a charged nanofiber melt-blown filtering material is adopted, and a halogen disinfectant is sprayed on the surface of the filtering material and then dried;

the outer layer (13) is three layers of mesh cloth.

2. The protective mask with the self-cleaning function according to claim 1, wherein: the inner layer (11) and the middle layer (12) are compounded into a whole.

3. The protective mask with the self-cleaning function according to claim 2, wherein: the nose part and the lower jaw part of the mask main body (1) are both arc-shaped.

4. The protective mask with the self-cleaning function according to claim 3, wherein: the periphery of the mask main body (1) is wrapped and sewed by an elastic edge-wrapping elastic band.

5. The protective mask with the self-cleaning function according to claim 1, wherein: the halogen disinfectant is chloramine, chloramine T or sodium dichloroisocyanurate.