Completely biodegradable filter material and preparation method thereof

A filter material, biodegradable technology, applied in the field of fully biodegradable filter material and its preparation, can solve the problems of low filtration efficiency, poor electret effect, etc., to meet performance requirements, good mechanical usability, excellent wearing comfort sexual effect

CN112295314AActive Publication Date: 2021-02-02QILU UNIV OF TECH +1
8 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-02-02
Patent Text Reader

Abstract

The invention provides a completely biodegradable filter material and a preparation method thereof. The preparation method comprises the steps of 1, adding a retention agent and an electret into paperpulp to prepare a wet paper web, wherein the paper web is quantified to range from 10 g / m<2> to 30 g / m<2>; (2) spunlacing the wet paper web obtained in the step (1) onto a spunlace polylactic acid non-woven fabric to obtain a plant fiber-polylactic acid non-woven fabric filtering base material; (3) carrying out skin-friendly treatment on the filtering base material in the step (2), so as to enable the filtering material to have good wearing comfort; and (4) carrying out electret treatment on the filtering base material obtained by the skin-friendly treatment, so as to enable the surface of the filtering material to have relatively high electrostatic potential, so as to obtain the completely biodegradable filtering material with high filtering efficiency. The obtained filtering material has excellent wearing comfort, good mechanical usability and good electret stability. The performance requirement of the filtering material is met, and meanwhile, a large amount of medical wastes causedby large-scale use of the disposable mask are avoided.
Need to check novelty before this filing date? Find Prior Art

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...

Examples

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) 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 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 treatmen...

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) 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 50 bar and a distance of 20 mm to obtain a plant fiber hydroentangled polylactic acid nonwoven fabric filter material.

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