Static-free mask filter membrane and preparation method thereof

A technology for filtering membranes and masks, which is applied in the field of air filter materials for masks, achieves the effects of small micropore diameter, good micropore filtering effect, and guaranteeing quality and reliability.

Active Publication Date: 2021-01-08
河南科高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects of the prior art and provide a non-static mask filter membrane to solve the above-mentioned problems that the existing polypropylene meltblown cloth exists as a mask filter material. defect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031]A method for preparing a non-static mask filter membrane, which uses micro-nano cellulose fibers, ultra-fine chemical fibers (sea-island polyester fibers), and two-component composite bonding fibers as main raw materials and is made by wet non-woven technology The specific steps are as follows:

[0032]1) The island-in-the-sea polyester fiber is opened and deflated; the opening process is: formulating a certain concentration of sodium hydroxide lye according to the dry weight of the fiber, and then at the bath ratio of 1:5~8, the lye concentration is 1 Under the condition of ~1.5%, add the fiber to the high-speed stirring tank for 30-40 minutes alkali treatment, the temperature of the lye is 90-100 ℃, take out the fiber after the reaction is completed, filter out the lye, wash with water to neutral, and dry it;

[0033]2) Put the opened and deflated sea-island polyester fiber, the deflated two-component composite bonding fiber and the micro-nano cellulose fiber dispersion into a slu...

Embodiment 2

[0039]The operation process is the same as in Example 1, except that the mass ratio of sea-island polyester fiber, micro-nano cellulose fiber, and two-component composite bonding fiber is 30:60:10.

[0040] The resulting filter membrane has a weight of 27g / m 2 , The air resistance is 37pa, the tensile strength is 10.3N / 15mm, the filtration efficiency of 0.3μm non-oily particles is 71.3% (32L / min air flow), and the bacteria filtration efficiency is 97.3%.

Embodiment 3

[0042] The operation process is the same as in Example 1, the difference is that the fibers used are PE / PA orange petal fibers composed of polyethylene and polyamide, micro-nano cellulose fibers, and two-component composite bonding fibers. Among them, PE / PA orange petal fibers open The fiber fineness after fibrillation is 0.15D, and the mass ratio of the three fibers is 35:35:30.

[0043] The resulting filter membrane has a weight of 27g / m 2 , The air resistance is 27pa, the tensile strength is 14N / 15mm, the filtration efficiency of 0.3μm non-oily particles is 58.3% (32L / min air flow), and the bacteria filtration efficiency is 98.5%.

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PUM

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Abstract

The invention relates to a static-free mask filter membrane and a preparation method thereof. The preparation method comprises the steps that: superfine chemical fibers are split and defibered, then the defibered superfine chemical fibers, defibered bi-component composite bonding fibers and micro-nano cellulose fiber dispersion liquid are put into a pulp tank containing water together, stirring isconducted to form evenly-dispersed pulp; and then papermaking is carried out into a wet film through an inclined net or rotary net former, and then vacuum dehydration, drying and shaping, flame-retardant finishing and water-repellent finishing are carried out. The mask filtering membrane disclosed by the invention has a uniformly distributed micropore structure and can provide a lasting filteringeffect; electrostatic electrets are not needed, and the wearing comfort is improved; the strength is higher, and a guarantee is provided for the reliability of mask products; the material is reusable, and moreover, the material is biodegradable, so that the problem of environmental pollution is avoided.

Description

Technical field[0001]The invention belongs to the technical field of air filter materials for masks, in particular to medical mask filter membrane materials, and specifically discloses a static-free mask filter membrane and a preparation method thereof.Background technique[0002]Conventional protective masks mainly use polypropylene meltblown cloth as the air filter material. The main reason is that the fiber is very fine, about 2~5μm or even smaller, which can be structured with micropores and provide a good micropore filtration effect. In addition, polypropylene is a non-polar material, easy to electret static electricity, and provides a good electrostatic adsorption and filtration effect; but its defects are also very obvious, mainly in the following aspects:[0003](1) Polypropylene melt blown cloth as an air filter material mainly relies on the electrostatic adsorption of electrets. The stability of the electrets will be affected by factors such as raw material formula, preparatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D46/54B01D46/00B01D39/16A41D31/04A41D13/11
CPCB01D46/543B01D46/0001B01D39/1607A41D13/11A41D31/04
Inventor 崔国士赵红英高俊娜赵康崔攀崔永明苗超
Owner 河南科高新材料有限公司
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