Antibacterial protective mask with three-layer structure

Abstract

The invention discloses an antibacterial protective mask with a three-layer structure, and belongs to the technical field of masks. The antibacterial protective mask comprises a mask main body and ear hanging parts connected with the mask main body, wherein the mask main body sequentially comprises an antibacterial layer (1), a filtering layer (2) and an inner layer (3) from the outer side to the inner side; the antibacterial layer (1) is a fabric containing a halamine antibacterial agent, the filtering layer (2) is a water electret melt-blown fabric, and the inner layer (3) is a real silk fabric. By utilizing the antibacterial effect of the halamine antibacterial agent and the real silk fabric, the prepared mask can completely kill staphylococcus aureus and escherichia coli within 18 seconds, the sterilization speed is high, and the antibacterial effect is excellent; the washable performance and the stability are excellent, and repeated use can be achieved; the preparation method is simple, and resource waste and environmental pollution are reduced; the water electret melt-blown cloth is adopted as the filtering layer, so that the filtering effect is excellent, and the standard of the II-type mask is met; the inner layer is made of real silk fabric, wearing is comfortable, and the risk of facial redness and swelling allergy is reduced.

Description

Technical Field

[0001] The invention relates to an antibacterial protective mask with a three-layer structure, belonging to the technical field of masks. Background Art

[0002] Microorganisms such as bacteria, viruses, and fungi in the air are constantly affecting human health. These microorganisms will multiply rapidly under suitable conditions and are more likely to cause cross-infection in public places. Wearing a mask is an effective way to isolate bacteria and viruses.

[0003] Currently, the main masks on the market are disposable non-woven masks. As the wearing time increases, the fibers on the surface of the non-woven masks fall off, which can easily irritate the face and cause redness, swelling, itching and other problems. In addition, many masks cannot effectively intercept and kill bacteria and viruses.

[0004] In the prior art, when many antibacterial compounds are applied to masks, hydrophobic functions are often added to assist in improving their antibacterial properties. CN117338078A discloses a waterproof elastic non-woven mask, in which the outer non-woven fabric of the mask is prepared by two dipping and two rolling in an impregnation liquid, and the impregnation liquid contains a long chain of halamine hydrophobic antibacterial alkyl, which separates harmful substances such as bacteria from the mask through a hydrophobic structure and kills them. CN111567927A discloses a hydrophobic sterilization mask, in which the barrier layer prepared by the mask contains an organic sterilization unit and a fluorine-containing copolymer hydrophobic unit, the hydrophobic unit isolates the pathogen droplets, and the sterilization unit kills the pathogens. However, the preparation process of this mask with added hydrophobic function is relatively complicated, and the sterilization speed is slow. The antibacterial agent used in traditional antibacterial finishing has problems such as poor durability, heat resistance and water solubility, and is prone to drug resistance. Summary of the invention

[0005]

Technical issues

[0006] The non-woven disposable masks available on the market can easily cause itching and redness on consumers' faces, and are not comfortable to wear. The method of adding hydrophobic function to improve the antibacterial effect of masks is relatively complicated in preparation and has a slow sterilization speed. A mask with fast sterilization speed, good stability, good washability, safety and durability, excellent filtration performance, and meeting the requirements of wearing comfort is needed.

[0007]

Technical solution

[0008] In view of the above problems existing in the prior art, the present invention provides an antibacterial protective mask with a three-layer structure. Halamine antibacterial agents have a fast sterilization speed, do not cause bacteria to develop drug resistance, have good stability, low solubility, and have the advantages of low raw material price, simple synthesis process, and simple finishing process. The present invention uses halamine antibacterial agents to modify the antibacterial layer fabric of the mask, and gives the outer layer of the mask excellent and stable antibacterial effect through a simple padding process. The middle layer adopts water-electret melt-blown cloth to improve the filtering performance of the mask. The inner layer adopts silk fabric to improve the comfort and breathability of the mask, and reduce the risk of facial redness, swelling and allergies caused by wearing the mask for a long time. At the same time, silk has certain antibacterial and antibacterial effects, so that the mask has a more excellent antibacterial effect. The mask prepared by the present invention is easy to operate, green and environmentally friendly, can provide a certain protection effect during the epidemic period of infectious diseases such as respiratory tract, and has great market application potential.

[0009] The first object of the present invention is to provide an antibacterial protective mask with a three-layer structure, comprising a mask body and connected ear hanging parts, wherein the mask body comprises an antibacterial layer, a filter layer and an inner layer from the outside to the inside; the antibacterial layer is a fabric containing a halogenamine antibacterial agent, the filter layer is a water-electret melt-blown cloth, and the inner layer is a silk fabric. Figure 1 shown.

[0010] In one embodiment of the present invention, the fibers of the antibacterial layer fabric are selected from one or more of cotton, linen, polyester, spandex, polypropylene, and nylon.

[0011] In one embodiment of the present invention, the antibacterial layer fabric is woven by weaving or knitting.

[0012] In one embodiment of the present invention, the weight of the water-electret meltblown fabric is 20 to 30 g / m 2 .

[0013] In one embodiment of the present invention, the material of the water-electret meltblown cloth is polypropylene fiber.

[0014] In one embodiment of the present invention, the silk fabric is dyed with natural pigments.

[0015] In one embodiment of the present invention, the silk fabric is selected from 12 momme, 16 momme, 19 momme, 25 momme, 30 momme and 40 momme.

[0016] In one embodiment of the present invention, the weave structure of the silk fabric is selected from one of double crepe, heavy crepe, georgette, double georgette, sangbo satin, plain crepe satin, and elastic plain crepe satin.

[0017] The second object of the present invention is to provide a method for preparing the above-mentioned antibacterial protective mask, comprising the steps of:

[0018] (1) the fabric is padded with an aqueous solution containing an antibacterial carrier and sodium hydroxide, dried, baked, soaped, dried, immersed in a hypohalite solution and the pH is adjusted, washed and dried to obtain an antibacterial layer;

[0019] (2) forming a filter layer from a water-electret meltblown cloth;

[0020] (3) making the silk fabric into the inner layer;

[0021] (4) sewing the antibacterial layer, the filter layer and the inner layer together to obtain a mask body; connecting the mask body to the ear hanging parts to obtain an antibacterial protective mask.

[0022] In one embodiment of the present invention, in step (1), the fibers of the fabric are selected from one or more of cotton, linen, polyester, spandex, polypropylene, and nylon.

[0023] In one embodiment of the present invention, in step (1), the fabric is woven by weaving or knitting.

[0024] In one embodiment of the present invention, in step (1), the antibacterial carrier is selected from cyanuric chloride or cyanuric fluoride.

[0025] In one embodiment of the present invention, in step (1), the hypohalite is selected from sodium hypochlorite, sodium hypobromite or calcium hypochlorite.

[0026] In one embodiment of the present invention, in step (1), the concentration of cyanuric chloride in the aqueous solution is 2 to 6 wt %, and the concentration of sodium hydroxide is 2 to 6 wt %.

[0027] In one embodiment of the present invention, in step (1), the dipping and rolling is double dipping and double rolling, the dipping time is 10 to 20 minutes, and the rolling rate is 80 to 120%.

[0028] In one embodiment of the present invention, in step (1), the baking temperature is 100-140° C., and the baking time is 5-15 min.

[0029] In one embodiment of the present invention, in step (1), soap washing is washing the fabric with soap solution and then washing the fabric with water.

[0030] In one embodiment of the present invention, in step (1), the concentration of the soap solution is 0.2-0.7 wt %.

[0031] In one embodiment of the present invention, in step (1), the concentration of the hypohalite solution is 8 to 12 wt %, the pH is adjusted to 6 to 8, and the immersion time is 0.5 to 2 h.

[0032] In one embodiment of the present invention, in step (1), the pH is adjusted with dilute sulfuric acid.

[0033] In one embodiment of the present invention, in step (1), the concentration of dilute sulfuric acid is 5 to 15 wt %.

[0034] In one embodiment of the present invention, in step (3), the silk fabric is dyed with natural pigments.

[0035] Beneficial effects:

[0036] The halamine antibacterial agent used in the present invention has a broad-spectrum antibacterial effect on microorganisms such as bacteria and fungi. The antibacterial protective mask produced has no toxic side effects on the human body, is environmentally friendly, has a fast sterilization speed, has excellent washability and stability, has a simple finishing method, is low in cost, and has high economic benefits.

[0037] The antibacterial layer prepared by the present invention is washed with water 20 times and then chlorinated, and the chlorine content is reduced from 0.22 to 0.18. The antibacterial layer still has a good antibacterial effect and excellent washability, and can be reused, thereby reducing resource waste and environmental pollution.

[0038] The invention utilizes the antibacterial effect of halamine antibacterial agents and silk fabrics, and the manufactured mask can completely kill Staphylococcus aureus and Escherichia coli within 18 seconds, has a fast sterilization speed and excellent antibacterial effect.

[0039] The present invention adopts water-electret meltblown cloth as the filter layer, and the manufactured mask has excellent filtering effect, and the filtering efficiency is 98.24%, which reaches the Class II mask standard specified in GBT32610-2016 "Technical Specifications for Daily Protective Masks".

[0040] The inner layer of the invention adopts silk fabric, which is skin-friendly and comfortable, and has good air permeability. The antibacterial protective mask is comfortable to wear, reduces the risk of facial redness and swelling allergies, and improves the antibacterial performance without destroying the microecological balance of human skin and mucous membranes. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 Schematic diagram of the main structure of a three-layer antibacterial mask.

[0042] In the figure: 1. Antibacterial layer; 2. Filter layer; 3. Inner layer.

[0043] Figure 2 The filtration performance of the filter layer and the masks made in Example 1 and Comparative Example 1. DETAILED DESCRIPTION

[0044] The preferred embodiments of the present invention are described below. It should be understood that the embodiments are for better explaining the present invention and are not used to limit the present invention.

[0045] Test Method

[0046] Antibacterial performance test: The antibacterial performance of the mask is tested according to the revised AATCC 100-2004 antibacterial test standard. The specific method is as follows. Take 25μL of bacterial droplets and drop them on the fabric (2.54cm×2.54cm). Use the sandwich method to press for a certain period of time so that the two pieces of fabric are close to each other to ensure sufficient contact between the bacterial liquid and the fabric. After contact for 0.3, 1, 5, 10, and 30 minutes, place the fabric in contact with the bacteria in a 15mL conical tube containing 5mL of phosphate buffer solution. After vortexing evenly, use the gradient drop plate method, and finally calculate the corresponding sterilization rate. The inoculation concentrations of Staphylococcus aureus and Escherichia coli are 2.8×10 6 cfu / sample and 1.6×10 6 cfu / sample.

[0047] Filtration efficiency test: The filtration performance of the prepared mask was tested according to GBT32610-2016 "Technical Specifications for Daily Protective Masks".

[0048] Washing stability test: According to AATCC 61-2006 "Color fastness to household and commercial washing", the antibacterial finished fabric is washed and tested. Cut the antibacterial fabric into at least 18 pieces, with a sample size of 2.54×5.08cm 2 .

[0049] Example 1

[0050] A three-layer antibacterial protective mask, comprising a mask body and connected ear hanging parts, wherein the mask body comprises an antibacterial layer 1, a filter layer 2 and an inner layer 3 from the outside to the inside; the antibacterial layer 1 is a woven cotton fabric containing a halogenamine antibacterial agent, with a warp and weft density of 133×72; the filter layer 2 is a woven cotton fabric with a gram weight of 25g / m 2 The inner layer 3 is a 16 momme silk crepe satin fabric dyed with natural pigment anthocyanin. The preparation method is as follows:

[0051] (1) Dissolve 4 g of cyanuric chloride and 3.7 g of sodium hydroxide in 92.3 g of deionized water, stir for 10 min to form a clear solution, and then soak and roll the cotton fabric for 15 min, with a rolling rate of 100%; dry in an oven at 80° C. for 5 min, and bake in a drying machine at 120° C. for 10 min;

[0052] The cotton fabric was taken out, and the cotton fabric was washed with a standard soap flake solution with a concentration of 0.5 wt% and deionized water, and dried in an oven at 45° C. to obtain unchlorinated cotton;

[0053] The dried cotton fabric was immersed in a 10wt% sodium hypochlorite solution, and the pH value was adjusted to 7.0 with 10wt% dilute sulfuric acid. After 1 hour, the fabric was taken out and washed with a large amount of water, and dried in an oven at 45°C to obtain an antibacterial layer.

[0054] (2) preparing a filter layer by forming a polypropylene water-electret meltblown cloth;

[0055] (3) making the inner layer of natural anthocyanin-dyed silk fabric;

[0056] (4) sewing the antibacterial layer, the filter layer and the inner layer together by a sewing machine to obtain a mask body; connecting the mask body to the ear hanging parts to obtain an antibacterial protective mask.

[0057] Example 2

[0058] The utility model relates to an antibacterial protective mask with a three-layer structure.

[0059] The difference from Example 1 is that in step (1), 2 g of cyanuric chloride and 3 g of sodium hydroxide are dissolved in 95 g of deionized water.

[0060] Comparative Example 1

[0061] A mask with a three-layer structure.

[0062] The difference from Example 1 is that the antibacterial layer is replaced with cotton fabric.

[0063] The antibacterial performance test results of the unchlorinated cotton, antibacterial layer, inner layer, and antibacterial protective mask of Example 1 are shown in Table 1. The antibacterial layer can kill all the bacteria within 1 minute of contact with the two bacteria, which shows that the antibacterial layer has excellent antibacterial properties. After the inner silk fabric was in contact with the bacteria for 30 minutes, both bacteria were reduced by nearly 99%, showing a certain antibacterial property. After contacting with the bacteria for 20 seconds, the two bacteria on the antibacterial layer were reduced by 99.13% and 98.96% respectively, and the two bacteria on the inner silk were reduced by 10.47% and 42.50% respectively, while the two bacteria on the antibacterial protective mask were completely killed, indicating that the combination of the antibacterial layer and the silk inner layer showed a more excellent bactericidal effect.

[0064] Table 1 Antibacterial performance test results of Example 1

[0065]

[0066] Filtration performance test results are shown in Figure 2As shown, after testing, the filtration efficiency of the antibacterial protective mask is 98.24%, reaching the Class II mask standard specified in GBT32610-2016 "Technical Specifications for Daily Protective Masks". The filtration efficiency of the filter layer reaches 97.18%, indicating that the excellent filtration performance of the mask mainly comes from the water-electret melt-blown filter layer in the middle. The filtration efficiency of the mask made in Example 1 is slightly higher than that of Comparative Example 1, indicating that the halamine antibacterial agent loaded on the cotton fabric can improve the overall filtration performance of the mask to a certain extent while being antibacterial.

[0067] Table 2 Water washability of the antibacterial layer of Example 1

[0068] Washing times 0 5 10 20 Chlorine content after washing (%) 0.22 0.13 0.10 0.07 Chlorine content after chlorination (%) 0.22 0.19 0.19 0.18

[0069] Table 2 shows the washing resistance of the antibacterial layer of Example 1. The bactericidal mechanism of halamine antibacterial agent is to destroy the metabolism and enzyme of bacteria through the strong oxidation of halogen positive ions, so as to achieve the purpose of killing bacteria. The hydrolysis of N-Cl bond is a major factor causing the decrease of active chlorine content in the fabric modified by halamine antibacterial agent during washing. The breaking of covalent bond between antibacterial agent and fiber will also cause the decrease of chlorine content. The decrease of active chlorine content caused by washing can be restored by re-chlorination, while the loss of chlorine caused by the breaking of covalent bond cannot be restored by chlorination. As can be seen from Table 2, after 10 washing cycles, part of the active chlorine in the outer antibacterial layer is lost, from the initial 0.22% to 0.10%. After 20 washing cycles, most of the active chlorine is lost (only 0.07%), but after re-chlorination, it can be restored to 0.18%, and the recovery rate is 82%. This indicates that the covalent bonds formed between the antibacterial agent and the cotton fibers are only slightly broken during the washing process and have good stability. The prepared outer antibacterial layer still has antibacterial properties after multiple washings.

[0070] The embodiments provided above are not intended to limit the scope of the present invention, and the steps described are not intended to limit the execution order thereof. Those skilled in the art may make obvious improvements to the present invention in combination with existing common knowledge, which also fall within the scope of protection defined by the claims of the present invention.

Claims

1. A three-layer antibacterial protective mask, comprising a mask body and connected ear hanging parts, characterized in that: The main body of the mask consists of an antibacterial layer, a filter layer and an inner layer from the outside to the inside; the antibacterial layer is a fabric containing a halamine antibacterial agent, the filter layer is a water-electret meltblown cloth, and the inner layer is a silk fabric.

2. The antibacterial protective mask according to claim 1, characterized in that: The weight of water electret meltblown fabric is 20-30g / m 2 ; The silk fabric is selected from one of 12 momme, 16 momme, 19 momme, 25 momme, 30 momme and 40 momme.

3. A method for preparing the antibacterial protective mask according to claim 1, characterized in that: Includes steps: (1) the fabric is padded with an aqueous solution containing an antibacterial carrier and sodium hydroxide, dried, baked, soaped, dried, immersed in a hypohalite solution and the pH is adjusted, washed and dried to obtain an antibacterial layer; (2) forming a filter layer from a water-electret meltblown cloth; (3) making the silk fabric into an inner layer; (4) sewing the antibacterial layer, the filter layer and the inner layer together to obtain a mask body; connecting the mask body to the ear hanging parts to obtain an antibacterial protective mask.

4. The preparation method according to claim 3, characterized in that: In step (1), the antibacterial carrier is selected from cyanuric chloride or cyanuric fluoride.

5. The preparation method according to claim 3, characterized in that: In step (1), the hypohalite is selected from one of sodium hypochlorite, sodium hypobromite or calcium hypochlorite.

6. The preparation method according to claim 3, characterized in that: In step (1), the antibacterial carrier concentration of the aqueous solution is 2-6wt%, and the sodium hydroxide concentration is 2-6wt%; the padding is double-dipping and double-padding, the soaking time is 10-20min, and the padding rate is 80-120%.

7. The preparation method according to claim 3, characterized in that: In step (1), the baking temperature is 100-140° C. and the baking time is 5-15 min.

8. The preparation method according to claim 3, characterized in that: In step (1), soap washing is washing the fabric with soap solution and then washing the fabric with water; the concentration of the soap solution is 0.2-0.7 wt %.

9. The preparation method according to claim 3, characterized in that: In step (1), the concentration of the hypohalite solution is 8 to 12 wt %, the pH is adjusted to 6 to 8, and the soaking time is 0.5 to 2 h.

10. The preparation method according to claim 3, characterized in that: In step (1), the pH is adjusted with dilute sulfuric acid.

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