Filtering material for mask and method for manufacturing filtering material

A technology for filter materials and masks, which is applied in the field of polymer nanofiber filter materials for masks and its preparation, can solve the problems of poor dustproof effect of masks, high quality of filter materials, poor air permeability of masks, etc., and achieve excellent air permeability, preparation method The effect of simplicity and excellent air permeability

Inactive Publication Date: 2013-01-16
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current filter materials for masks are mainly traditional non-woven non-woven fiber or rubber and plastic filter materials. The masks made of these materials have poor dustproof effect or poor air permeability.
For example, Chinese utility model patent (ZL02232615.4) has introduced a kind of dust-proof r

Method used

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  • Filtering material for mask and method for manufacturing filtering material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Dissolve 2.000g of polyvinylidene fluoride in a mixed solvent of 2.677g of N,N-dimethylacetamide and 10.708g of acetone. After the solution is uniformly mixed, the solution of polyvinylidene fluoride nanofibers is electrospun by solution Spun on a 2 g support meltblown nonwoven. The cross-sectional view of the prepared mask filter material is as follows: figure 1 shown. In the prepared filter material for masks, the weight ratio of polyvinylidene fluoride nanofibers and support body melt-blown non-woven fabric is 1:10; and the thickness of polyvinylidene fluoride nanofiber layer is 25um, The average diameter of the ethylene nanofibers was 355 nm. The filter material is tested by the sodium flame method, and the retention rate of sodium chloride aerosol particles is 89.8%, and the pressure drop is 35.2mm water column.

Embodiment 2

[0029] 1.000g of polyvinyl alcohol was dissolved in 10.000g of water, and after the solution was mixed uniformly, the aqueous solution of the polyvinyl alcohol nanofiber was spun on 2g of support body melt-blown non-woven fabric by solution electrospinning. In the filter material for the prepared mask, the weight ratio of polyvinyl alcohol nanofibers and support body melt-blown nonwoven fabric is 1:5; The average diameter is 330 nm. After testing, the retention rate of the filter material to sodium chloride aerosol particles is 90.5%, and the pressure drop is 40.2mm water column.

Embodiment 3

[0031] Dissolve 1.000g of polylactic acid in a mixed solvent of 9.000g of dichloromethane and 0.500g of ethanol. After the solution is uniformly mixed, the solution of polylactic acid nanofibers is spun on 2g of support body spunbonded nonwoven by solution electrospinning. on cloth. In the obtained filter material for mouth mask, the weight ratio of polylactic acid nanofibers and support body spunbonded nonwoven fabric is 3: 10; and, the thickness of polylactic acid nanofiber layer is 30um, and the average diameter of polylactic acid nanofibers is 1000nm. After testing, the retention rate of the filter material for sodium chloride aerosol particles is 79.8%, and the pressure drop is 38.8mm water column.

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Abstract

The invention discloses a filtering material for a mask and a method for manufacturing the filtering material. The filtering material for the mask comprises polymeric nano-fibers and a supporting non-woven fabric. The method for manufacturing the filtering material includes spinning homogenous polymeric nano-fiber spinning solution or fusant on the supporting non-woven fabric by solution or fusion electrostatic spinning. The filtering material for the mask is excellent in breathability, and rejection to sodium chloride aerosol particles with the sizes of 0.3 micrometer can be higher than 90%. Besides, the method for manufacturing the filtering material for the mask is simple, cost is low, and the filtering material and the method are applicable to industrial production.

Description

technical field [0001] The invention relates to a filter material for a mask and a preparation method thereof, in particular to a polymer nanofiber filter material for a mask and a preparation method thereof. Background technique [0002] Today's world economy is developing rapidly, and people's living standards have improved significantly. However, economic development has also brought serious environmental problems. The residues emitted by combustion in the process of industrial production, daily power generation, and automobile exhaust emissions have a huge impact on human respiratory health. Especially the very fine particulate matter (PM 2.5) with a diameter of less than 2.5um in the air, they are the biggest culprits of atmospheric haze and human lung cancer. On February 29, 2012, Premier Wen Jiabao of the State Council presided over an executive meeting of the State Council and agreed to release the newly revised "Ambient Air Quality Standards", stipulating that PM ...

Claims

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Application Information

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IPC IPC(8): B01D39/16A41D13/11
Inventor 李磊马吉全齐江远曹城英谭磊
Owner SHANGHAI JIAO TONG UNIV
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