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Preparation method of high-strength low-resistance mildew-proof filtering material

A filter material and low-resistance technology, applied in the direction of filtration separation, separation method, dispersed particle filtration, etc., can solve the problems of uneven distribution of active ingredients, short service life of products, and less active factors in filtration, so as to improve energy transfer and increase The effect of lubricity and loose structure

Pending Publication Date: 2022-04-12
山东华业无纺布有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned filter materials have filtering effect, due to simple multi-layer pressing, less active filter factors, and no clear division of labor between layers, resulting in poor strength, low efficiency, uneven distribution of active components, low dust holding rate, and short service life of the product , low cost performance and other disadvantages, which eventually lead to problems such as cracking and mildew of the filter material due to external factors (such as large wind volume, heavy rainfall, and high humidity) during the use of the product, making the filter material invalid

Method used

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  • Preparation method of high-strength low-resistance mildew-proof filtering material
  • Preparation method of high-strength low-resistance mildew-proof filtering material

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Effect test

Embodiment 1

[0056] The preparation method of the high-strength and low-resistance mildew-proof filter material described in the present embodiment 1 consists of the following steps:

[0057] (1) Dry polypropylene chips with different intrinsic viscosities (0.3 dL / g for low intrinsic viscosity and 0.9 dL / g for high intrinsic viscosity) at 105°C for 3 hours.

[0058] (2) The dried high intrinsic viscosity polypropylene slices, fluid additive Enox DTBP, and mesoporous inorganic electret silica (average particle size is 150nm) are mixed in a twin-screw in a mass ratio of 100:3.5:8 After blending in the extruder, extrude, condense, air-dry, and pelletize the pelletizer to obtain the polymer slice blended modified product, wherein the extrusion temperature is 200°C, the condensation temperature is 30°C, the air-drying time is 30min, and pelletized The size of machine-cut pellets is 40 μm, and the blended modified product with high intrinsic viscosity is finally obtained.

[0059] (3) The dried...

Embodiment 2

[0074] The preparation method of the high-strength and low-resistance mildew-proof filter material described in this embodiment 2 consists of the following steps:

[0075] (1) Polybutylene terephthalate chips with different intrinsic viscosities (low intrinsic viscosity 0.6 dL / g, high intrinsic viscosity 1 dL / g) were dried at 85°C for 5 hours.

[0076] (2) The dried high intrinsic viscosity polybutylene terephthalate slices, fluid additive FM, and mesoporous inorganic electret agent titanium dioxide (average particle size is 300nm) are mixed in a mass ratio of 100:0.8:6 Proportion After blending in a twin-screw extruder, extrude, condense, air-dry, and pelletize with a pelletizer to obtain a polymer chip blending modification, wherein the extrusion temperature is 230°C, the condensation temperature is 40°C, and the air-drying time is After 40 minutes, the particle size of the granulator was 50 μm, and finally a high intrinsic viscosity blended modified product was obtained.

...

Embodiment 3

[0092] The preparation method of the high-strength and low-resistance mildew-proof filter material described in this embodiment 3 consists of the following steps:

[0093] (1) Dry polyethylene terephthalate chips with different intrinsic viscosities (low intrinsic viscosity is 0.5dL / g, high intrinsic viscosity is 1.2dL / g) at 115°C for 2.5h .

[0094] (2) The dried high-intrinsic-viscosity polyethylene terephthalate chips, fluid additive WS, and mesoporous inorganic electret agent zinc sulfide (average particle size 300nm) were mixed in a mass ratio of 100:4:6 Ratio After blending in a twin-screw extruder, extrude, condense, air-dry, and pelletize with a pelletizer to obtain a polymer slice blended modified product, wherein the extrusion temperature is 220°C, the condensation temperature is 40°C, and the air-drying time is After 35 minutes, the particle size of the granulator was 50 μm, and finally a high intrinsic viscosity blended modified product was obtained.

[0095] (3)...

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Abstract

The invention belongs to the technical field of non-woven fabric preparation, and particularly relates to a preparation method of a high-strength low-resistance mildew-proof filtering material. The preparation method comprises the following steps: drying polymer slices; blending and modifying high-intrinsic-viscosity polymer slices; blending and modifying the low-intrinsic-viscosity polymer slices; preparing a crude fiber net with a primary filtering effect by adopting a high-intrinsic-viscosity polymer slice blending modifier; preparing a fine fiber net with an advanced filtering effect by adopting a low-intrinsic-viscosity polymer slice blending modifier; the coarse fiber net and the superfine fiber net are bonded through a needling treatment technology, and the high-strength low-resistance mildew-proof filtering material is obtained after high-voltage electric electret treatment. According to the preparation method of the high-strength low-resistance mildew-proof filtering material, the air permeability, the tensile strength, the longitudinal breaking strength and the mildew resistance of the filtering material are improved by adding the mesoporous inorganic electret and the nano inorganic electret which have porous adsorption on particles with different particle sizes.

Description

technical field [0001] The invention belongs to the technical field of non-woven fabric preparation, and in particular relates to a method for preparing a high-strength, low-resistance mildew-proof filter material. Background technique [0002] With the increasing environmental pollution, social progress and improvement of people's living standards, the impact of air quality on human health has attracted more and more attention. Since the winter of 2013, repeated hazy weather has made air pollution a major obstacle affecting people's pursuit of a healthy life. According to the information released by the U.S. Environmental Protection Agency, suspended particles with a size smaller than 2.5 μm are the main cause of damage to the human respiratory tract and extrapulmonary organs, and are also the main source of air pollution. Studies have shown that harmful substances in smog mainly include organic alkanes, sulfates, nitrates and soot produced by incomplete fuel oil in automo...

Claims

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Application Information

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IPC IPC(8): B01D46/00B01D39/14D04H3/14D04H3/105D04H3/016D04H3/007D04H3/011
CPCY02A50/2351
Inventor 李波李进宁曰文李军梁镜华王京荣牟延涛蔡源张少现武建军
Owner 山东华业无纺布有限公司
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