A completely biodegradable filter material and its preparation method

A filter material, biodegradable technology, applied in the field of completely biodegradable filter material and its preparation, can solve the problems of low filtration efficiency, poor electret effect, etc., achieve good mechanical usability, excellent wearing comfort, good dwelling very stable effect

Active Publication Date: 2022-04-15
QILU UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention uses natural plant fiber spunlaced polylactic acid non-woven fabric to obtain a completely biodegradable filter substrate, and then undergoes skin-friendly treatment and stationery treatment to endow it with good wearing comfort and high filtration efficiency, overcoming the The disadvantages of poor electret effect and low filtration efficiency exist in the combined use of natural plant fibers and polylactic acid materials

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A completely biodegradable filter material and a preparation method thereof, comprising the following steps:

[0049](1) Select bleached kraft softwood pulp, after beating by PFI, prepare pulp with a concentration of 1%, add 20% tourmaline powder relative to the absolute dry mass of the pulp, and add 2% of the absolute dry mass of the pulp with a molecular weight of 8,000,000 Cationic polyacrylamide is used as the resident agent, formed by inclined wire paper machine, and the weight of the paper base is 20g / m 2 .

[0050] (2) Choose quantitative 13g / m 2 The polylactic acid non-woven fabric is firstly subjected to spunlace treatment once, the water pressure is 50bar, and the distance is 5mm. Then, the wet paper web is hydroentangled onto the polylactic acid nonwoven fabric with a water pressure of 30 bar and a distance of 20 mm to obtain a plant fiber hydroentangled polylactic acid nonwoven fabric filter material.

[0051] (3) Carry out skin-friendly treatment by soak...

Embodiment 2

[0054] A completely biodegradable filter material and a preparation method thereof, comprising the following steps:

[0055] (1) Select kraft method softwood pulp, after beating by PFI, prepare pulp with a concentration of 0.5%, add 20% tourmaline powder relative to the absolute dry mass of the pulp, and add cations with a molecular weight of 8 million in 2% of the absolute dry mass of the pulp Polyacrylamide is used as the resident agent, formed by inclined wire paper machine, and the basis weight of the paper base is 20g / m 2 .

[0056] (2) Use quantitative 13g / m 2 The polylactic acid non-woven fabric is firstly subjected to spunlace treatment once, the water pressure is 50bar, and the distance is 5mm. Then, the wet paper web is hydroentangled onto the polylactic acid nonwoven fabric with a water pressure of 50 bar and a distance of 20 mm to obtain a plant fiber hydroentangled polylactic acid nonwoven fabric filter material.

[0057] (3) Carry out skin-friendly treatment b...

Embodiment 3

[0060] A completely biodegradable filter material and a preparation method thereof, comprising the following steps:

[0061] (1) Select kraft method softwood pulp, after beating through PFI, prepare pulp with a concentration of 1.5%, add 20% silicon nitride relative to the absolute dry mass of the pulp, and add 2% of the absolute dry pulp with a molecular weight of 8 million Cationic polyacrylamide is used as the resident agent, formed by inclined wire paper machine, and the weight of the paper base is 20g / m 2 .

[0062] (2) Use quantitative 13g / m 2 The polylactic acid non-woven fabric is firstly subjected to spunlace treatment once, the water pressure is 50bar, and the distance is 5mm. Then the wet paper web is hydroentangled on the polylactic acid spunlaced non-woven fabric, the water pressure is 50 bar, and the distance is 20 mm to obtain the plant fiber spunlace polylactic acid non-woven fabric filter material.

[0063] (3) Carry out skin-friendly treatment by soaking i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM

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Abstract

The invention provides a completely biodegradable filter material and a preparation method thereof. (1) adding a resident agent and an electret agent to the pulp to make a wet paper web, and the basis weight of the paper web is 10 to 30 g / m 2 (2) spunlace the wet paper web described in the step (1) onto the spunlaced polylactic acid non-woven fabric to obtain the plant fiber-polylactic acid non-woven fabric filter substrate; (4) carry out electret treatment to the filter base material obtained through skin-friendly treatment, so that the surface of the filter material has a higher electrostatic potential, and obtain Fully biodegradable filter material with high filtration efficiency. The obtained filter material has excellent wearing comfort, good mechanical usability and good electret stability. While meeting the performance requirements of the filter material, it avoids a large amount of medical waste caused by the extensive use of disposable masks.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a completely biodegradable filter material and a preparation method thereof. Background technique [0002] Natural plant fiber is a completely biodegradable material, and plant fiber itself is also a porous material with high specific surface area and strong adsorption. Therefore, it is very important to prepare biodegradable air filter materials from plant fiber. development potential. [0003] However, as an air filter material, plant fibers have short fibers, low breaking strength, are easily damaged after contact with water and lose their protective effect, and cannot be electret; and polylactic acid fibers have a larger aspect ratio than plant fibers. The non-woven fabric prepared by it has stronger physical strength than the plant fiber paper base material, and has a certain degree of electrification. The material has good structural stability after being...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/14
CPCB01D39/14B01D2239/10B01D2239/12B01D2239/0266B01D2239/0435
Inventor 李霞赵传山陈立栋丁其军
Owner QILU UNIV OF TECH
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