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A kind of rewashable air filter material and preparation method thereof

An air filter material and filter membrane technology, applied in the field of repeatable water-washable air filter material and its preparation, can solve the problems of reducing the adsorption and capturing ability of ultrafine particles, easy peeling, and reduced adhesion, and achieve easy automatic production, Simple and efficient operation, the effect of low air resistance

Active Publication Date: 2022-04-01
TIANJIN TEDA FILTERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these composite materials cannot be cleaned and reused after the dust particles in the air are clogged to reach their service life. The reasons include that the adhesion between the filter membranes will decrease after cleaning, resulting in a decrease in the structural strength of the composite material, and the layers are easy to peel off, and Washing with water will take away the electrostatic charge stored in the melt-blown cloth, reducing the ability to absorb and capture ultrafine particles, etc.
This has caused a lot of waste of resources, and the waste composite materials need to undergo additional harmless treatment, otherwise it will increase the environmental burden

Method used

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  • A kind of rewashable air filter material and preparation method thereof
  • A kind of rewashable air filter material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] According to the present invention, adopt following preparation method to prepare the air filter material that can wash repeatedly:

[0044] (1) 24kg of ethylene-vinyl acetate copolymer, 20kg of polymethyl methacrylate, 17kg of low density polyethylene and 0.9kg of 2,6-di-tert-butyl-p-cresol are heated to 160°C for melting;

[0045] (2) add the terpene resin of 10kg, the paraffin of 5kg and the dihexyl phthalate of 2.7kg in the melt of step (1) gained, smelting is even;

[0046] (3) Use a coating roller with a smooth surface to melt the molten composite adhesive obtained in step (2) at a linear speed of 24m / min at 150°C at a rate of 9g / m 2 The amount of roll coating on the meltblown cloth; and

[0047] (4) The polytetrafluoroethylene filter membrane is superimposed on the melt-blown cloth coated with the composite adhesive obtained in step (3), at 0.52N / cm 2 Rolling under high pressure.

[0048] A rewashable air filter material according to the invention is thus prod...

Embodiment 2

[0050] According to the present invention, adopt following preparation method to prepare the air filter material that can wash repeatedly:

[0051] (1) 25kg of ethylene-vinyl acetate copolymer, 18kg of polymethyl methacrylate, 18kg of low density polyethylene and 1.0kg of 2,6-di-tert-butyl-p-cresol are heated to 162°C for melting;

[0052] (2) add the terpene resin of 9kg, the paraffin of 6kg and the dihexyl phthalate of 2.0kg in the melt of step (1) gained, smelting is even;

[0053] (3) Use a coating roller with a smooth surface to melt the molten composite adhesive obtained in step (2) at a linear speed of 25m / min at 145°C at a rate of 7g / m 2 The amount of roll coating on the meltblown cloth; and

[0054] (4) The polytetrafluoroethylene filter membrane is superimposed on the melt-blown cloth coated with the composite adhesive obtained in step (3), at 0.53N / cm 2 Rolling under high pressure.

[0055] A rewashable air filter material according to the invention is thus produce...

Embodiment 3

[0057] According to the present invention, adopt following preparation method to prepare the air filter material that can wash repeatedly:

[0058] (1) 26kg of ethylene-vinyl acetate copolymer, 17kg of polymethyl methacrylate, 16kg of low density polyethylene and 1.4kg of 2,6-di-tert-butyl-p-cresol are heated to 155°C for melting;

[0059] (2) add the terpene resin of 11kg, the paraffin of 5kg and the dihexyl phthalate of 2.5kg in the melt of step (1) gained, smelting is even;

[0060] (3) Use a coating roller with a smooth surface to melt the molten composite adhesive obtained in step (2) at a linear speed of 26m / min at 152°C at a rate of 12g / m 2 The amount of roll coating on the meltblown cloth; and

[0061] (4) The polytetrafluoroethylene filter membrane is superimposed on the melt-blown cloth coated with the composite adhesive obtained in step (3), at 0.51N / cm 2 Rolling under high pressure.

[0062] A rewashable air filter material according to the invention is thus pro...

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Abstract

The invention discloses a repeatable water-washable air filter material and a preparation method thereof. The air filter material includes a melt-blown cloth, a polytetrafluoroethylene filter membrane and a composite adhesive between the melt-blown cloth and the polytetrafluoroethylene filter membrane, and the composite adhesive includes the following components : 24-28 parts by weight of ethylene-vinyl acetate copolymer, 17-20 parts by weight of polymethyl methacrylate, 15-18 parts by weight of low-density polyethylene, 9-12 parts by weight of terpene resin, 3-6 parts by weight of paraffin wax , 2 to 3.5 parts by weight of dihexyl phthalate. The air filter material according to the present invention will not reduce the composite strength even after being washed many times, and still has high filtering efficiency and low air resistance. In addition, the present invention also provides a preparation method of the above-mentioned air filter material, the preparation method is simple and efficient in operation and easy in automatic production.

Description

technical field [0001] The invention relates to the field of air filter materials, in particular to a rewashable air filter material and a preparation method thereof. Background technique [0002] Melt-blown fabric, also known as melt-blown non-woven fabric, is a kind of non-woven fabric. It uses polypropylene particles as the main material and is produced through continuous steps such as high-temperature melting, spinning, hot air drafting, and net laying. become. The melt-blown cloth contains a large number of superfine fibers that are self-bonded and randomly distributed, so that a large number of pores are formed between the fibers, so it has extremely good filtration efficiency. The diameter of the superfine fibers is between 1 and 2 μm, and the pore size is between 0.1 and Between 0.5 μm, if the diameter of the particles is larger than the pores of the melt-blown cloth, they will be directly blocked by the fibers, while when the diameter of the particles is smaller th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J123/08C09J133/12C09J123/06C09J145/00C09J11/06C09J11/08B01D46/00B01D39/08
CPCC09J123/0853C09J11/06C09J11/08B01D46/0032B01D39/083B01D2239/10C08L2205/035C08L33/12C08L23/06C08L45/00C08L91/06C08K5/13C08K5/12
Inventor 杨东昇王建成毛祥东王波和妍春
Owner TIANJIN TEDA FILTERS