Biomass filtering membrane material for replacing medical mask melt-blown cloth and preparation method

A biomass and filter membrane technology, applied in the field of medical materials, can solve the problems of easy stretching and deformation, high raw material process requirements, difficult control of melt-blown fiber fineness and uniformity, etc. Demanding results with good feel and elasticity

Inactive Publication Date: 2020-11-03
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the fact that the preparation of melt blown cloth has high requirements on raw material technology, it is difficult to control the fineness and uniformity of melt blown fibers, and it is easy to stretch and deform when applying medical mask protective materials. This invention proposes an alternative medical mask Biomass filter membrane material and preparation method of melt-blown cloth, thereby obtaining a melt-blown cloth substitute material with excellent filtration performance

Method used

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  • Biomass filtering membrane material for replacing medical mask melt-blown cloth and preparation method
  • Biomass filtering membrane material for replacing medical mask melt-blown cloth and preparation method
  • Biomass filtering membrane material for replacing medical mask melt-blown cloth and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Add 25kg of starch, 4kg of polyvinyl alcohol, 0.04kg of boric acid, and 0.15kg of nano tourmaline with a fineness of 80nm into a high-speed mixer, stir evenly at a temperature of 85°C, and then add 0.08kg of hydrogen into 12.5kg of water Prepare sodium oxide as lye, then add lye to the high-speed mixer, close the vent hole and continue stirring for 20 minutes to make the lye fully penetrate the starch and polyvinyl alcohol, then raise the temperature of the high-speed mixer to 105°C, and open the exhaust at the same time Exhaust through the hole, reduce the moisture content of the material to 11%, and then discharge the material to obtain the mixed material;

[0035] (2) Seal the obtained mixed material for 30 hours, then add 85kg of the sealed stored material, 4kg of EVA, 1.5kg of N, N'-ethylene bisstearamide, and 0.2kg of polytetrafluoroethylene micropowder into the stirring tank and mix evenly. Then extrude foaming through a single-screw extruder, the single-scre...

Embodiment 2

[0037] (1) Add 28kg of starch, 3.5kg of polyvinyl alcohol, 0.03kg of boric acid, and 0.12kg of nano tourmaline with a fineness of 70nm into a high-speed mixer, stir evenly at a temperature of 82°C, and then add 0.06kg of hydrogen into 11kg of water Prepare sodium oxide as lye, then add lye into the high-speed mixer, close the vent hole and continue stirring for 18 minutes, so that the lye can fully penetrate the starch and polyvinyl alcohol, then raise the temperature of the high-speed mixer to 102°C, and open the exhaust at the same time Exhaust through the hole, reduce the moisture content of the material to 11.5%, and then discharge the material to obtain the mixed material;

[0038] (2) Seal the obtained mixed material for 28 hours, then add 88kg of the sealed stored material, 3.5kg of EVA, 1.2kg of N,N'-ethylene bisstearamide, and 0.15kg of polytetrafluoroethylene micropowder into the stirring tank and mix evenly , then extrude foaming through a single-screw extruder, the...

Embodiment 3

[0040] (1) Add 22kg of starch, 4.5kg of polyvinyl alcohol, 0.04kg of boric acid, and 0.18kg of nano tourmaline with a fineness of 90nm into a high-speed mixer, stir evenly at a temperature of 88°C, and then add 0.08kg of hydrogen into 14kg of water Prepare sodium oxide as lye, then add lye to the high-speed mixer, close the vent hole and continue stirring for 22 minutes to make the lye fully penetrate the starch and polyvinyl alcohol, then raise the temperature of the high-speed mixer to 108°C, and open the exhaust at the same time Exhaust through the hole, reduce the moisture content of the material to 11%, and then discharge the material to obtain the mixed material;

[0041] (2) Seal the obtained mixed material for 33 hours, then add 82kg of the sealed stored material, 4.5kg of EVA, 1.8kg of N, N'-ethylene bisstearamide, and 0.25kg of polytetrafluoroethylene micropowder into the stirring tank and mix evenly , then extrude foaming through a single-screw extruder, the single-...

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Abstract

The invention provides a biomass filtering membrane material for replacing medical mask melt-blown cloth and a preparation method. The biomass filtering membrane material is prepared by the followingsteps: adding starch, polyvinyl alcohol, boric acid, nano tourmaline, water and sodium hydroxide into a high-speed mixer in sequence, and then heating and opening/closing the vent holes for mixing andstirring the components to obtain a mixed material; and then sealing and storing the materials, mixing the materials with EVA, N,N'-ethylene bisstearamide and polytetrafluoroethylene micro powder, extruding and foaming the mixture into sheets, and then stretching the sheets, and air-cooling and rolling the sheets to obtain the product. The biomass filtering membrane material is high in filteringefficiency and strong in filtering, adsorbing and aggregating properties on fine dust and viruses, can completely replace the existing melt-blown cloth to be used for medical masks, is easy and simplein process control, controllable in micropores and extremely low in equipment investment, and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of medical materials, in particular to a biomass filter membrane material and a preparation method for replacing the melt-blown cloth of a medical mask. Background technique [0002] Melt blown cloth is a kind of non-woven fabric with excellent filtration performance, which is the core material of masks. Melt blown cloth mainly uses polypropylene as the main raw material, and the fiber diameter can reach 1-5 microns. There are many voids, fluffy structure, and good wrinkle resistance. The ultrafine fibers with unique capillary structure increase the number and surface area of ​​fibers per unit area, so that the melt blown cloth has good filterability, shielding, heat insulation and oil absorption. It can be used in air and liquid filter materials, isolation materials, absorption materials, mask materials, thermal insulation materials, oil absorption materials and wiping cloths and other fields. [0003] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/08B01D67/00B01J20/26B01J20/28B01J20/30A41D31/14A41D31/00A41D13/11
CPCA41D13/11A41D31/00A41D31/14B01D67/0079B01D71/08B01J20/0248B01J20/10B01J20/24B01J20/261B01J20/28033
Inventor 曾军堂陈庆司文彬白涛
Owner CHENDU NEW KELI CHEM SCI CO LTD
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