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Electret film, preparation method, application, and air purification device

An electret and thin film technology, applied in the field of electret materials and preparation, can solve the problems of low charge density and storage stability, charge failure, etc., achieve high charge density and electrostatic voltage, not easy to decay, and improve performance.

Pending Publication Date: 2020-04-17
ZHEJIANG GOLDENSEA ENVIRONMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method has a simple preparation process and low preparation cost, the charge density and storage stability are low, which will lead to rapid charge decay and failure during later use.

Method used

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  • Electret film, preparation method, application, and air purification device
  • Electret film, preparation method, application, and air purification device
  • Electret film, preparation method, application, and air purification device

Examples

Experimental program
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preparation example Construction

[0116] In a second aspect, in some embodiments, a method for preparing an electret film is provided, comprising the following steps:

[0117] making a base film from a mixture comprising a first polymer and an electret masterbatch;

[0118] The base film is subjected to electret treatment to obtain an electret film.

[0119] The preparation method of the film material has the characteristics of simple process operation, convenient manipulation, low cost, suitable for mass production and the like.

[0120] Specifically, after mixing the electret masterbatch and the polymer material according to a certain ratio, the base film is obtained by melt extrusion, and then the base film is subjected to surface treatment and corona electret to obtain a high-performance electret Membrane air filter material. The electret film air filter material produced by the invention has high charge density and static voltage, can generate a durable and stable electrostatic field and is not easy to ...

Embodiment 1

[0147] 1. An electret film, mainly prepared from the following raw materials:

[0148] Polypropylene and electret masterbatch, wherein, the weight content of electret masterbatch is 5%;

[0149] The electret masterbatch includes the following components by weight: 2.5% nano active titanium dioxide, 2.5% nano active calcium carbonate, 5% nano tourmaline, 2.5% substituted aryl carboxylate aluminum salt, 5% hindered amine, 5% phosphite , 5% pentaerythritol ester and 72.5% polypropylene.

[0150] 2, the preparation method of electret thin film, comprises the following steps:

[0151] 2.5% nano active titanium dioxide, 2.5% nano active calcium carbonate, 5% nano tourmaline, 2.5% substituted aryl carboxylate aluminum salt, 5% hindered amine, 5% phosphite, 5% pentaerythritol ester and 72.5% polypropylene Add it to a high-speed mixing mixer and mix and disperse for 20-30 minutes, extrude and granulate with a twin-screw extruder at an extrusion temperature of 180-240°C; then dry the ...

Embodiment 2

[0158] The difference between this embodiment and embodiment 1 is that the weight content of electret masterbatch is 2%; the rest are the same as embodiment 1.

[0159] In this embodiment, the test results show that the resistance is 0.1 Pa and the filtration efficiency is 32.962%.

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Abstract

The invention provides an electret film, a preparation method, application, and an air purification device, and relates to the technical field of electret materials and preparation methods. The electret film is mainly prepared from the following raw materials in percentage by weight: a first polymer and 2-10% of an electret master batch, wherein the electret master batch comprises the following components in parts by weight: 1-20 parts of an inorganic electret additive, 5-50 parts of an organic electret additive and 40-90 parts of a second polymer. The thin film air filtration material comprises a polymer substrate and the electret master batch capable of increasing charge density. The electret film air filtering material prepared by the invention has very high charge density and electrostatic voltage, can generate a durable and stable electrostatic field which is not easy to attenuate. The film material can capture and bear fine dust particles by utilizing electrostatic adsorption force, has the advantages of repeated washing and repeated utilization, and can be applied to the field of air filtration.

Description

technical field [0001] The invention relates to the technical field of electret materials and preparation methods, in particular to an electret film, preparation method, application and air purification device. Background technique [0002] Polymer film materials have excellent insulating properties. The covalent bonds in the molecules are not easy to ionize, and cannot transmit electrons or ions, so that the surface of the film has a high surface resistance. Different materials will accumulate a lot of static electricity on the surface when they contact each other and rub against each other. The charged film is easy to absorb dust, making the surface of the film dirty and affecting normal production. However, in the field of air filtration, the use of electrostatic adsorption to filter fine particles in the air has become a mainstream method of purifying air. The melt-blown non-woven filter material that has been widely used at present is based on the principle of electros...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08K3/22C08K3/26C08K3/38C08K5/524C08K13/02C08J5/18B29D7/01F24F3/16F24F13/28
CPCC08J5/18B29D7/01F24F13/28C08J2323/12C08J2423/12C08K2201/011C08K2003/2241C08K2003/265C08K3/38C08K5/524C08K13/02F24F8/108F24F8/10F24F8/192
Inventor 丁伊可蓝文权黄禄英俞剑
Owner ZHEJIANG GOLDENSEA ENVIRONMENT TECH
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