Mask filter layer and preparation method and application thereof

A filter layer and mask technology, applied in applications, textiles and papermaking, clothing, etc., can solve the problems of the decline of the filtration performance of meltblown non-woven fabrics, the inability of masks to effectively protect, and the high bacteria and virus processing capacity, and achieve the restoration of electrostatic adsorption. ability, efficient electrical and thermal conductivity, and the effect of repeated use

Pending Publication Date: 2020-10-02
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The results show that: cleaning with alcohol, disinfectant or soapy water will greatly reduce the filtration performance of melt-blown non-woven fabrics, and the masks after disinfection by such methods cannot be effectively protected; ultraviolet disinfection has low ultraviolet penetration, It is difficult to completely kill the defects of viruses; they found that the use of high temperature treatment at about 70-100 ° C has little effect on the filtration performance of melt-blown non-woven fabrics, and has a high ability to treat bacteria and viruses
[0004] However, so far, additional professional high-temperature disinfection equipment is required to achieve high-temperature treatment at around 70-100°C

Method used

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  • Mask filter layer and preparation method and application thereof
  • Mask filter layer and preparation method and application thereof
  • Mask filter layer and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0052] The present invention also provides the preparation method of above-mentioned mask filter layer, concrete steps are as follows:

[0053] 1. Take a commercialized melt-blown non-woven fabric for surgical masks, and cut it according to the size of the commercial mask.

[0054] 2. Paste the flexible conductive electrode on the surface of the melt-blown non-woven fabric according to the designed pattern. It is necessary to ensure that the conductive electrode broadband is evenly distributed and the conductive electrode is pasted flat to ensure that the current passes evenly.

[0055] 3. Mix water-based modified resin and water-based special conductive grade graphene according to the weight ratio of 5:2 to 5:4, and use a magnetic stirrer to stir for more than 2 hours to configure uniform high-performance conductive-conductive water-based graphene ink.

[0056] 4. Use a coating machine to evenly coat the water-based graphene ink obtained in step 3 on the surface of the melt-...

Embodiment 1

[0062] Apply the flexible conductive cloth tape according to the designed pattern ( figure 2 shown) pasted on the surface of the melt-blown non-woven fabric. Mix the water-based modified resin and water-based special conductive grade graphene according to the weight ratio of 5:3, and use a magnetic stirrer to stir for more than 2 hours to make them evenly mixed. Then the above mixed solution is coated on the surface of the melt-blown non-woven fabric with flexible conductive electrodes (0.0126g / cm 2 ), and dry naturally.

[0063] The two poles of the conductive electrode of the improved filter layer made above are respectively connected to the positive and negative poles of the DC voltage source, such as image 3 As shown, the voltage is 3V, keep the power on for 30 minutes, then disconnect the power.

[0064] Figure 4 It is a curve graph of the temperature changing with time for the above-mentioned improved filter layer under the voltage of 3V. It can be seen that the ...

Embodiment 2

[0067] The difference between this embodiment and Embodiment 1 lies in that the structures of the conductive electrodes are different.

[0068] Apply flexible conductive cloth tape to the Image 6 The structure shown is pasted on the surface of the meltblown nonwoven. Mix the water-based modified resin and water-based special conductive grade graphene according to the weight ratio of 5:3, and use a magnetic stirrer to stir for more than 2 hours to make them evenly mixed. Then the above mixed solution is coated on the surface of the melt-blown non-woven fabric with flexible conductive electrodes (0.0126g / cm 2 ), and dry naturally.

[0069] Connect the two poles of the conductive electrode to the positive and negative of the DC voltage source respectively, with a voltage of 3V, and keep the power on for 30 minutes, such as Figure 7 As shown, non-uniform heat generation on the lower surface of the electrode structure was observed.

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Abstract

The invention discloses a mask filter layer and a preparation method and application thereof, and belongs to the technical field of protective articles. The mask filter layer sequentially comprises amelt-blown non-woven fabric, a conductive electrode and a conductive-thermal conductive film from bottom to top; and the cross section of a three-layer structure formed by the melt-blown non-woven fabric, the conductive electrode and the conductive-thermal conductive film is I-shaped. Compared with an existing graphene mask, the improved flexible interdigital electrode is designed on the melt-blown non-woven fabric for the commercial surgical mask, and the melt-blown non-woven fabric for the commercial surgical mask is coated with a layer of water-based graphene ink with efficient electric conduction and heat conduction performance. The electrified filter layer not only can realize sterilization and disinfection, but also can recover the electrostatic adsorption capacity of the melt-blownnon-woven fabric, so that the filterability is improved, and the purpose of repeated use is achieved.

Description

technical field [0001] The invention belongs to the technical field of protective equipment, and in particular relates to a mask filter layer and its preparation method and application. Background technique [0002] The 2019 outbreak of coronavirus (COVID-19) is still rampant around the world, and it is mainly transmitted through respiratory droplets. Wearing medical surgical or N95 masks can provide effective protection, but the use time of a single mask generally cannot exceed 4 hours, which leads to a huge consumption of masks, and the supply of masks is currently in a state of shortage. Under such circumstances, whether the sterilized masks can be reused has become a very real problem. And most of the waste masks are incinerated at present, which brings a burden to the environment. [0003] Therefore, how to provide a method for disinfecting while maintaining the filter performance of the mask is very important to solve the problem of reusing the mask. Cui Yi, a profe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A41D13/11A41D31/30A41D31/02A41D31/04D06N3/00
CPCA41D13/11A41D31/305D06N3/00D06N3/0011D06N3/0063D06N2211/30D06N2209/041D06N2209/062D06N2209/1671
Inventor 单晓莉甘志星刘慈慧狄云松
Owner NANJING NORMAL UNIVERSITY
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