A kind of environment-friendly air filter non-woven fabric and its production process and application

An air filtration and production process technology, applied in filtration and separation, textiles and papermaking, non-woven fabrics, etc., can solve the problems of low charge stability of melt-blown polypropylene fibers, difficult to maintain high efficiency and low resistance performance, etc., to improve the electret Chemical effect, improve storage stability, good electret effect

Active Publication Date: 2021-09-28
DONGGUAN CHUNXIA IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, after direct electret treatment of melt-blown polypropylene material, the capture of submicron particles is achieved through the Coulomb force of the charged fiber, but the charge stability of the melt-blown polypropylene fiber after electret treatment is low, and it is difficult to maintain Good high efficiency and low resistance performance

Method used

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  • A kind of environment-friendly air filter non-woven fabric and its production process and application

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preparation example Construction

[0037] The electret master batch is composed of polypropylene, few-layer graphene nanosheets, antioxidant, compatibilizer, nucleating agent; the preparation method of the electret master batch comprises the following steps:

[0038] a1, take 5g of magnesia microcrystalline powder and place it in an alumina ceramic boat, move the ceramic boat equipped with magnesia microcrystalline powder into the middle of the tube furnace, close the tube furnace, replace the air in the tube with argon, Adjust the flow rate of argon gas at 100-120ml / min, gradually heat the tube furnace to 920-1000°C, the heating rate is 8-10°C / min, keep warm for 10-30min after the temperature reaches the target temperature, and switch the atmosphere to methane and The mixed gas of hydrogen, the flow rate of the mixed gas is constant at 60-72ml / min, start to deposit few layers of graphene on the surface of the magnesium oxide microcrystal, the deposition time is 90-100min, after the deposition is completed, the ...

Embodiment 1

[0057] A kind of production technology of environment-friendly air filter non-woven fabric, comprises the following steps:

[0058] S1. Mix polypropylene, electret masterbatch and polymer electret uniformly to prepare a mixture; wherein, the weight ratio of the polypropylene, the electret masterbatch and the polymer electret is 100 :6:0.5;

[0059] S2. Feed the mixture into a screw extruder, and melt and extrude it to form a melt. The temperatures of the five heating zones of the screw extruder are respectively set to 160°C, 180°C, 200°C, 220°C, 225°C;

[0060] S3, the melt is kept in the pipeline at a constant temperature, and after being metered by a metering pump, it is sprayed out through a spinneret to form fibers, and the fibers are drawn by hot air at a constant temperature and pressure to form a melt-blown cloth on the mesh curtain;

[0061] S4. The melt-blown cloth prepared in S3 is subjected to constant temperature infrared radiation heat treatment, 50,000-60,000 v...

Embodiment 2

[0071] A kind of production technology of environment-friendly air filter non-woven fabric, comprises the following steps:

[0072] S1. Mix polypropylene, electret masterbatch and polymer electret uniformly to prepare a mixture; wherein, the weight ratio of the polypropylene, the electret masterbatch and the polymer electret is 100 :6:0.5;

[0073] S2. Feed the mixture into a screw extruder, and melt and extrude it to form a melt. The temperatures of the five heating zones of the screw extruder are respectively set to 160°C, 180°C, 200°C, 220°C, 225°C;

[0074] S3. The melt is kept in the pipeline at a constant temperature, and after being metered by a metering pump, it is sprayed out through a spinneret to form fibers. The fibers are drawn by hot air at a constant temperature and pressure to form a melt-blown cloth on a mesh curtain. Meltblown cloth is subjected to surface modification treatment, specifically:

[0075] S4. Under a protective atmosphere, add 0.65g of dodecy...

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Abstract

The invention provides an environment-friendly production process of non-woven fabric for air filtration, which belongs to the technical field of air filtration. Polypropylene, electret masterbatch and polymer electret are evenly mixed, and the prepared mixture is fed into a screw for extrusion. machine, the screw extruder is melted and extruded to form a melt, and the melt is sprayed out through a spinneret to form fibers, and the fibers are drawn by hot air at constant temperature and pressure to form melt-blown cloth on the mesh curtain, and then sequentially After infrared radiation heat treatment, high-pressure electret treatment and cooling treatment, the air filter non-woven fabric is wound up, and the electret masterbatch is composed of polypropylene, few-layer graphene nanosheets, antioxidant, compatibilizer, nucleating The composition of the agent; the few-layer graphene nanosheets are prepared by chemical vapor deposition with magnesium oxide microcrystals with a face-centered cubic structure as a substrate and a template, and the electret masterbatch improves the degree of electretization of the fiber, At the same time, the storage stability of the charge is improved, thereby improving the filtration performance.

Description

technical field [0001] The invention relates to the technical field of air filtration, in particular to an environment-friendly air filtration non-woven fabric and its production process and application. Background technique [0002] Existing studies have shown that particulate matter caused by pollution in the air, especially those with an aerodynamic equivalent of 2.5 microns or less, has a small particle size and is rich in toxic and harmful substances. These particles can stay in the air for a long time and are easily destroyed. People absorb it into the body and cause respiratory diseases, lung injury, cancer, cardiovascular disease, reproductive system, fetal development and other diseases. [0003] Commonly used fiber filter materials mainly rely on Brownian diffusion, interception, inertial collision, and direct interception to catch dust. The electrostatic adsorption between filter materials and particles is very small, and the filtration efficiency of small particl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/56D04H1/4291D01F6/46D01F1/10D06M10/02D06M10/00D06M13/328D06M15/05D06M15/263B01D39/08D06M101/20
CPCB01D39/08D01F1/10D01F6/46D04H1/4291D04H1/56D06M10/001D06M10/025D06M13/328D06M15/05D06M15/263D06M2101/20D06M2200/50
Inventor 张春节
Owner DONGGUAN CHUNXIA IND CO LTD
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