High-efficiency low-resistance multifunctional composite membrane air purification material and preparation process thereof

Abstract

The application discloses a kind of high efficiency low resistance multifunctional composite membrane air purification materials and its preparation process, adopt dust holding layer and filter membrane layer through the adhesion particle and support layer under the action of hot pressing and be integrated into one.The dust holding layer is thick, fiber is thick, has high dust holding capacity, in order to reduce the interface resistance when dust holding layer and support layer hot pressing composite, adopt the adhesion glue particle of dust holding layer larger particle size, make dust holding layer and support layer connect through glue particle protrusion, many cavities are formed between glue particle and glue particle, gas is evenly distributed in cavity, avoid the interface effect of dust holding layer and support layer two layers and increase resistance.No static attenuation, dust holding capacity is large, high efficiency low resistance, can effectively intercept particulate matter and microbial aerosol in air and the like advantage, simultaneously can the bacteria virus microbial aerosol of interception be rapidly killed, prevent the advantage of secondary pollution.

Description

Technical Field

[0001] This invention belongs to the field of air purification and environmental protection technology, and in particular relates to a high-efficiency, low-resistance, multifunctional composite membrane air purification material and its preparation process. Background Technology

[0002] Air purification materials are the core of air purification equipment and fresh air purification systems, determining the purification effect of the equipment and system, making them a focus of research. Currently, the purification principles of air purification materials can be divided into two types: electrostatic adsorption and mechanical interception. Electrostatic adsorption materials, such as melt-blown materials, rely on their own electrostatic filtration to adsorb particulate matter and microbial aerosols in the air, and have a large dust holding capacity. However, the static electricity carried by the material easily decays in the air, especially in high humidity conditions, causing a rapid decline in the material's filtration and adsorption efficiency. Mechanical interception materials, on the other hand, do not carry static electricity and rely entirely on physical interception. Various nanofiber membranes are representative of this type, relying on the filter pores formed by ultra-fine fibers to mechanically intercept particulate matter and microbial aerosols in the air. While this type of material does not have the problem of electrostatic decay, the thinness of the nanofiber filter membrane limits its dust holding capacity and its long-term stable operation. Furthermore, ordinary air purification materials cannot kill bacteria and viruses after intercepting microbial aerosols, posing a risk of secondary pollution. Current antibacterial materials are mostly obtained by spraying antibacterial agents onto the material surface or by impregnating the air filter material in an antibacterial liquid and then drying it. Spraying antibacterial agents directly onto the material surface poses a risk of the agents detaching during use. Direct impregnation followed by drying results in a large amount of liquid residue, high drying energy consumption, and high production costs. Summary of the Invention

[0003] To address the issues of easy loss of static electricity in traditional electrostatic materials and low dust holding capacity in mechanically intercepted nanofiber membrane materials, this invention discloses a high-efficiency, low-resistance, multifunctional composite membrane air purification material and its preparation process. It has the advantages of no static electricity attenuation, large dust holding capacity, high efficiency and low resistance, and can effectively intercept particulate matter and microbial aerosols in the air. At the same time, it can quickly kill the intercepted bacteria, viruses and microbial aerosols, preventing secondary pollution.

[0004] The technical solution of this invention is as follows: a high-efficiency, low-resistance, multifunctional composite membrane air purification material, comprising a dust-holding layer, dust-holding layer adhesive particles, a support layer, a filter membrane layer, filter membrane layer adhesive particles, and a functional layer. The dust-holding layer is bonded to one side of the support layer by the dust-holding layer adhesive particles, the filter membrane layer is bonded to the other side of the support layer by the filter membrane layer adhesive particles, and the functional layer is located between the dust-holding layer and the support layer.

[0005] Furthermore, the dust-holding layer has a thickness of 0.8-2mm and is made of PP meltblown cloth or PET filter cotton, which is composed of stacked fibers with a fiber diameter of 10-500μm.

[0006] Furthermore, the adhesive particles used in the dust-collecting layer are composed of EVA, with particle size 2-3 times the diameter of the dust-collecting layer fibers, and the amount of adhesive particles used is 10-20 g / m². 2 .

[0007] Furthermore, the thickness of the filter membrane layer is 0.5-2μm, and the material is one or more of PVDF, PAN, PA, PES, PU, ​​PLA, and PS. The filter membrane is prepared by electrospinning, or by biaxial stretching of PTFE, and the fiber diameter is 10-500nm.

[0008] Furthermore, the adhesive particles used in the filter membrane layer are composed of EVA, with a particle size 0.8-1.2 times the diameter of the filter membrane layer fibers, and the amount of adhesive particles used is 3-8 g / m³. 2 .

[0009] Furthermore, the functional layer is prepared by spraying an antibacterial component or a solution or suspension of a traditional Chinese medicine component onto a support layer. The antibacterial component is one or more of inorganic antibacterial agents, organic antibacterial agents, or natural antibacterial agents. The inorganic antibacterial agent is a silver ion antibacterial agent or a copper ion antibacterial agent. The organic antibacterial agent is an acylaniline, imidazole, or thiazole antibacterial agent. The natural antibacterial agent is one or more of chitin, mustard, castor oil, or wasabi extract. The traditional Chinese medicine component is one or more of forsythia, honeysuckle, bupleurum, or houttuynia cordata extract.

[0010] A process for preparing a high-efficiency, low-resistance, multifunctional composite membrane air purification material includes the following steps:

[0011] Step 1: Adhesive particles adhere to the dust-collecting layer. Place the support layer roll material in the take-up and unwinding device. At a certain take-up and unwinding speed, melt the solid adhesive and use a spray device with heating and heat preservation to spray and cure it on one side of the support layer between the take-up roller and the unwinding roller. Then, use cold air to blow parallel to the support layer from the other side of the support layer.

[0012] Step 2: Adhesive particles are attached to the filter membrane layer. The support layer with the adhesive particles attached to the dust-collecting layer is placed again in the take-up and unwinding device. At a certain take-up and unwinding speed, the solid adhesive is melted and then sprayed and cured on the adhesive-free side of the support layer between the take-up and unwinding rollers using a spray device with heating and heat preservation. Cold air is sprayed parallel to the support layer on the side with the adhesive particles attached to the dust-collecting layer.

[0013] Step 3, functional layer attachment: Place the support layer with the dust-holding layer adhesive particles and the filter membrane layer adhesive particles on the take-up and unwinding device. At a certain take-up and unwinding speed, spray antibacterial ingredients or traditional Chinese medicine solution or suspension on the surface of the support layer dust-holding layer adhesive particles between the take-up roller and the unwinding roller using an atomizing device. On the other side, hot air is sprayed parallel to the support layer.

[0014] Step four, thermal lamination of materials: The three layers of materials, namely the dust-containing layer, the support layer, and the filter membrane layer, are placed in the laminating unit. The dust-containing layer is located on the side of the support layer where the dust-containing layer adheres to the adhesive particles, and the filter membrane layer is located on the other side of the support layer. At the same time, they pass through the gap between the hot roller and the pressure roller of the laminating unit and are laminated and then wound up under certain temperature and pressure.

[0015] In step one, which is a further step, the spray nozzle diameter is 0.1-1mm, the winding and unwinding speed is 3-5m / min, and the cold air consumption is 1-2m³ / min. 3 The speed is 16-25℃, the temperature of the cold air used is 16-25℃, in step two, the nozzle diameter of the spray device is 0.05-0.5mm, the winding and unwinding speed is 2-3m / min, and the cold air consumption is 0.5-1.5m³ / min. 3 / min, the temperature of the cold air used is 20-28℃.

[0016] Furthermore, in step three, the nozzle diameter of the atomizing device is 0.1-0.4 mm, the winding and unwinding speed is 5-8 m / min, and the temperature of the hot air is 45-60℃.

[0017] Furthermore, in step four, the composite temperature is 130-150℃, the composite speed is 1.5-2m / min, and the composite pressure is 0.1-0.5MPa. Beneficial effects

[0018] This invention discloses a high-efficiency, low-resistance, multifunctional composite membrane air purification material and its preparation process. The dust-holding layer and filter membrane layer are bonded together with a support layer via adhesive particles under hot pressing. The dust-holding layer is thick and has coarse fibers, resulting in high dust holding capacity. To reduce the interfacial resistance during the hot pressing process, large-diameter adhesive particles are used to connect the dust-holding layer and support layer through these protrusions. Numerous cavities are formed between these particles, allowing for uniform gas distribution and preventing increased resistance due to interfacial effects between the dust-holding and support layers. The functional layer is prepared by spraying an antibacterial or traditional Chinese medicine solution or suspension onto the support layer, reducing liquid content and facilitating drying. Simultaneously, the functional layer is embedded within the cavities between the adhesive particles of the dust-holding layer and covered by both the dust-holding and support layers, preventing it from detaching under airflow during use. The filter membrane layer has fine fibers, forming small pores and achieving high filtration efficiency. It is bonded to the support layer with small-particle-size adhesive particles, creating numerous cavities between the particles. This prevents the entire filter membrane layer from contacting the support layer, thus avoiding blockage of the filter channels and increased resistance due to interfacial effects. The air purification material disclosed in this invention, through the functional cooperation of four layers—dust-collecting layer, support layer, filter layer, and functional layer—effectively purifies the air, kills intercepted microorganisms, and ensures stable operation over long periods.

[0019] The present invention discloses a high-efficiency, low-resistance, multifunctional composite membrane air purification material preparation process, which can be completed in four steps. In the processes of adhering adhesive particles to the dust holding layer and the filter membrane layer, atomizing devices with different nozzle diameters and different winding and unwinding speeds are used to control the adhesion size and amount of adhesive particles on the support layer. During the adhesion process, the atomizing device sprays cold air from the other side of the support layer, which can quickly solidify the adhesive particles attached to the support layer and form protrusions, preventing liquid adhesive particles from spreading flat on the support layer and clogging the filter channels. During the preparation of the functional layer, hot air is sprayed from the other side of the support layer, which can quickly evaporate the liquid solvent and precipitate the effective functional materials and leave them on the support layer, eliminating the need for oven drying and saving energy. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the high-efficiency, low-resistance, multifunctional composite membrane air purification material described in this invention.

[0021] Figure 2 This is an electron microscope image of the adhesive particles in the dust-collecting layer described in this invention.

[0022] Figure 3 Electron micrograph of the adhesive particles adhering to the filter membrane layer.

[0023] Figure 4 This is a cross-sectional electron microscope image of a multifunctional composite membrane air purification material.

[0024] Wherein: 1-dust-containing layer, 2-dust-containing layer adhesive particles, 3-support layer, 4-filter membrane layer, 5-filter membrane layer adhesive particles, 6-functional layer. Detailed Implementation Example 1

[0025] A high-efficiency, low-resistance, multifunctional composite membrane air purification material includes a dust-holding layer 1, dust-holding layer adhesive particles 2, a support layer 3, a filter membrane layer 4, filter membrane layer adhesive particles 5, and a functional layer 6. The dust-holding layer 1 is bonded to one side of the support layer through the dust-holding layer adhesive particles 2, and the filter membrane layer 4 is bonded to the other side of the support layer through the filter membrane layer adhesive particles 5. The functional layer 6 is located between the dust-holding layer 1 and the support layer 3.

[0026] Furthermore, the dust-containing layer 1 has a thickness of 0.8 mm and is made of PP meltblown fabric, which is composed of stacked fibers with a fiber diameter of 10 μm.

[0027] Furthermore, the adhesive particles 2 of the dust-collecting layer are composed of EVA, the particle size is twice the diameter of the dust-collecting layer fibers, and the amount of adhesive particles 2 used is 10g / m³. 2 .

[0028] Furthermore, the filter membrane has a thickness of 0.5 μm, is made of PVDF, and is prepared by electrospinning with a fiber diameter of 10 nm.

[0029] Furthermore, the adhesive particles 5 used in the filter membrane layer are composed of EVA, with a particle size 0.8 times the diameter of the fiber in the filter membrane layer 4, and the amount of adhesive particles 5 used is 3 g / m³. 2 .

[0030] Furthermore, the functional layer 6 is formed by spraying an antibacterial component onto the support layer 3, and the antibacterial component is a silver ion antibacterial agent among inorganic antibacterial agents.

[0031] A process for preparing a high-efficiency, low-resistance, multifunctional composite membrane air purification material includes the following steps:

[0032] Step 1: Adhesive particles 2 adhere to the dust-collecting layer. The roll of material for the support layer 3 is placed in the take-up and unwinding device. At a certain take-up and unwinding speed, the solid adhesive is melted and then sprayed onto one side of the support layer 3 between the take-up and unwinding rollers using a heating and heat-insulating spraying device. Simultaneously, cold air is sprayed parallel to the support layer from the other side. The spraying device has a nozzle diameter of 0.1 mm, a take-up and unwinding speed of 3 m / min, and a cold air consumption of 1 m³ / min. 3 / min, the temperature of the cold air used is 25℃.

[0033] Step two: Adhesive particles 5 are attached to the filter membrane layer. The support layer 3 with the attached dust-collecting adhesive particles is placed again in the take-up and unwinding device. At a certain take-up and unwinding speed, the solid adhesive is melted and then sprayed onto the adhesive-free side of the support layer 3 between the take-up and unwinding rollers using a spray device with heating and heat preservation. Cold air is sprayed parallel to the support layer on the side where the dust-collecting adhesive particles 2 are attached. The spray device has a nozzle diameter of 0.05 mm, a take-up and unwinding speed of 2 m / min, and a cold air volume of 0.5 m³ / min. 3 / min, the temperature of the cold air used is 28℃.

[0034] Step 3, attaching the functional layer 6: Place the support layer 3, which is attached to the dust-collecting layer adhesive particles 2 and the filter membrane layer adhesive particles 5, into the take-up and unwinding device. At a certain take-up and unwinding speed, use an atomizing device to spray antibacterial ingredients onto the surface of the support layer 3 where the dust-collecting layer adhesive particles 2 are attached between the take-up and unwinding rollers, and spray hot air parallel to the support layer on the other side. The diameter of the atomizing device nozzle is 0.1 mm, the take-up and unwinding speed is 5 m / min, and the temperature of the hot air is 45℃.

[0035] Step four, thermal lamination of materials: The three layers of materials—dust-containing layer 1, support layer 3, and filter membrane layer 4—are placed in the laminating unit. Dust-containing layer 1 is positioned on the side of the support layer and the adhesive granules 2, while filter membrane layer 4 is positioned on the other side of the support layer 3. Simultaneously, they pass through the gap between the hot roller and pressure roller of the laminating unit. After lamination under specific temperature and pressure, they are wound up. The lamination temperature is 130℃, the lamination speed is 1.5m / min, and the lamination pressure is 0.1MPa.

[0036] Testing showed that the high-efficiency, low-resistance, multifunctional composite membrane air purification material prepared in this embodiment achieved an interception efficiency of over 99.95% for 0.3-micron particles, while its resistance was only 25 Pa, which is half the resistance of ordinary melt-blown filter materials with the same efficiency. Its dust holding capacity reached 150 g / m³. 2 It has an antibacterial rate of over 99% against Staphylococcus aureus, and its efficiency does not decrease after one month of continuous use. Example 2

[0037] A high-efficiency, low-resistance, multifunctional composite membrane air purification material includes a dust-holding layer 1, dust-holding layer adhesive particles 2, a support layer 3, a filter membrane layer 4, filter membrane layer adhesive particles 5, and a functional layer 6. The dust-holding layer 1 is bonded to one side of the support layer through the dust-holding layer adhesive particles 2, and the filter membrane layer 4 is bonded to the other side of the support layer through the filter membrane layer adhesive particles 5. The functional layer 6 is located between the dust-holding layer 1 and the support layer 3.

[0038] Furthermore, the dust-collecting layer 1 has a thickness of 1.3 mm and is made of PET filter cotton, which is composed of stacked fibers with a fiber diameter of 230 μm.

[0039] Furthermore, the adhesive particles 2 of the dust-collecting layer are composed of EVA, the particle size is 3 times the diameter of the dust-collecting layer fibers, and the amount of adhesive particles 2 used is 15g / m³. 2 .

[0040] Furthermore, the filter membrane has a thickness of 1.2 μm, is made of PTFE, and is prepared by biaxial stretching with a fiber diameter of 150 nm.

[0041] Furthermore, the adhesive particles 5 used in the filter membrane layer are composed of EVA, and the particle size is 1 times the diameter of the fiber in the filter membrane layer 4. The amount of adhesive particles 5 used in the filter membrane layer is 5 g / m³. 2 .

[0042] Furthermore, the functional layer 6 is formed by spraying antibacterial components onto the support layer 3, and the antibacterial components are a mixed extract of mustard, castor oil, and wasabi.

[0043] A process for preparing a high-efficiency, low-resistance, multifunctional composite membrane air purification material includes the following steps:

[0044] Step 1: Adhesive particles 2 adhere to the dust-collecting layer. The roll of support layer 3 is placed in the take-up and unwinding device. At a certain take-up and unwinding speed, the solid adhesive is melted and then sprayed onto one side of the support layer 3 between the take-up and unwinding rollers using a heating and heat-insulating spray device. Simultaneously, cold air is sprayed parallel to the support layer from the other side. The spray device has a nozzle diameter of 0.5 mm, a take-up and unwinding speed of 4 m / min, and a cold air consumption of 1.5 m³ / min. 3 / min, the temperature of the cold air used is 20℃.

[0045] Step 2: Adhesive particles 5 are attached to the filter membrane layer. The support layer 3 with the attached dust-collecting adhesive particles is placed again in the take-up and unwinding device. At a certain take-up and unwinding speed, the solid adhesive is melted and then sprayed and cured on the adhesive-free side of the support layer 3 between the take-up and unwinding rollers using a spray device with heating and heat preservation. Cold air is sprayed parallel to the support layer on the side where the dust-collecting adhesive particles 2 are attached. The spray device has a nozzle diameter of 0.2 mm, a take-up and unwinding speed of 2.5 m / min, a cold air consumption of 1 m3 / min, and a cold air temperature of 25°C.

[0046] Step 3, attaching the functional layer 6: Place the support layer 3, which is attached to the dust-collecting layer adhesive particles 2 and the filter membrane layer adhesive particles 5, into the take-up and unwinding device. At a certain take-up and unwinding speed, spray antibacterial ingredients, traditional Chinese medicine ingredients solution, or suspension onto the surface of the support layer 3 with dust-collecting layer adhesive particles 2 between the take-up roller and the unwinding roller using an atomizing device. On the other side, spray hot air parallel to the support layer. The diameter of the atomizing device nozzle is 0.25 mm, the take-up and unwinding speed is 7 m / min, and the temperature of the hot air is 54℃.

[0047] Step four, thermal bonding of materials: The three layers of materials, dust-containing layer 1, support layer 3, and filter membrane layer 4, are placed in the bonding unit. Dust-containing layer 1 is located on the side of the support layer dust-containing layer adhesive particles 2, and filter membrane layer 4 is located on the other side of the support layer 3. At the same time, they pass through the gap between the hot roller and the pressure roller of the bonding unit. After bonding under certain temperature and pressure, they are wound up. The bonding temperature is 140℃, the bonding speed is 1.8m / min, and the bonding pressure is 0.5MPa.

[0048] Testing showed that the high-efficiency, low-resistance, multifunctional composite membrane air purification material prepared in this embodiment achieved an interception efficiency of over 99.9% for 0.3-micron particles, a resistance of 30 Pa, and a dust holding capacity of up to 120 g / m³. 2 It has an antibacterial rate of over 99% against Staphylococcus aureus, and its efficiency does not decrease after one month of continuous use. Example 3

[0049] A high-efficiency, low-resistance, multifunctional composite membrane air purification material includes a dust-holding layer 1, dust-holding layer adhesive particles 2, a support layer 3, a filter membrane layer 4, filter membrane layer adhesive particles 5, and a functional layer 6. The dust-holding layer 1 is bonded to one side of the support layer through the dust-holding layer adhesive particles 2, and the filter membrane layer 4 is bonded to the other side of the support layer through the filter membrane layer adhesive particles 5. The functional layer 6 is located between the dust-holding layer 1 and the support layer 3.

[0050] Furthermore, the dust-holding layer 1 has a thickness of 2mm and is made of PET filter cotton, which is composed of stacked fibers with a fiber diameter of 500μm.

[0051] Furthermore, the adhesive particles 2 of the dust-collecting layer are composed of EVA, the particle size is 3 times the diameter of the dust-collecting layer fibers, and the amount of adhesive particles 2 used is 20g / m². 2 .

[0052] Furthermore, the filter membrane has a thickness of 2μm and is made of PVD and PS through electrospinning, with a fiber diameter of 500nm.

[0053] Furthermore, the adhesive particles 5 used in the filter membrane layer are composed of EVA, and the particle size is 1.2 times the diameter of the fiber in the filter membrane layer 4. The amount of adhesive particles 5 used in the filter membrane layer is 8 g / m³. 2 .

[0054] Furthermore, the functional layer 6 is prepared by spraying a suspension of traditional Chinese medicine ingredients onto the support layer 3, wherein the traditional Chinese medicine ingredients are a mixture of extracts of forsythia, honeysuckle, bupleurum, and houttuynia cordata.

[0055] A process for preparing a high-efficiency, low-resistance, multifunctional composite membrane air purification material includes the following steps:

[0056] Step 1: Adhesive particles 2 adhere to the dust-collecting layer. The roll of support layer 3 is placed in the take-up and unwinding device. At a certain take-up and unwinding speed, the solid adhesive is melted and then sprayed onto one side of support layer 3 between the take-up and unwinding rollers using a heating and heat-insulating spray device. Simultaneously, cold air is sprayed parallel to the support layer from the other side. The spray device has a nozzle diameter of 1mm, a take-up and unwinding speed of 5m / min, and a cold air volume of 2m³ / min. 3 / min, the temperature of the cold air used is 16℃.

[0057] Step two: Adhesive particles 5 are attached to the filter membrane layer. The support layer 3 with the attached dust-collecting adhesive particles is placed again in the take-up and unwinding device. At a certain take-up and unwinding speed, the solid adhesive is melted and then sprayed onto the adhesive-free side of the support layer 3 between the take-up and unwinding rollers using a spray device with heating and heat preservation. Cold air is sprayed parallel to the support layer on the side where the dust-collecting adhesive particles 2 are attached. The spray device has a nozzle diameter of 0.5 mm, a take-up and unwinding speed of 3 m / min, and a cold air volume of 1.5 m³ / min. 3 / min, the temperature of the cold air used is 20℃.

[0058] Step 3, attaching the functional layer 6: Place the support layer 3, which is attached to the dust-collecting layer adhesive particles 2 and the filter membrane layer adhesive particles 5, into the take-up and unwinding device. At a certain take-up and unwinding speed, spray antibacterial ingredients, traditional Chinese medicine ingredients solution, or suspension onto the surface of the support layer 3 with dust-collecting layer adhesive particles 2 between the take-up roller and the unwinding roller using an atomizing device. On the other side, spray hot air parallel to the support layer. The diameter of the atomizing device nozzle is 0.4 mm, the take-up and unwinding speed is 8 m / min, and the temperature of the hot air is 45℃.

[0059] Step 4: Thermal lamination of materials. The three layers of materials, namely dust-containing layer 1, support layer 3, and filter membrane layer 4, are placed in the lamination unit. Dust-containing layer 1 is located on the side of the support layer dust-containing layer adhesive particles 2, and filter membrane layer 4 is located on the other side of the support layer 3. At the same time, they pass through the gap between the hot roller and the pressure roller of the lamination unit. The lamination is carried out at a lamination temperature of 150℃, a lamination speed of 2m / min, and a lamination pressure of 0.3MPa.

Claims

1. A preparation process for a high-efficiency, low-resistance, multifunctional composite membrane air purification material, characterized in that, Includes the following steps: Step 1: Adhesive particles adhere to the dust-collecting layer. The support layer roll is placed in the take-up and unwinding device. At a certain take-up and unwinding speed, the solid adhesive is melted and then sprayed onto one side of the support layer between the take-up and unwinding rollers using a heated and heat-insulating spray device. Simultaneously, cold air is sprayed parallel to the support layer from the other side. The spray nozzle diameter is 0.1-1mm, the take-up and unwinding speed is 3-5m / min, and the cold air volume is 1-2m³ / min. 3 / min, using cold air temperature 16-25℃; Step two: Adhesive particles are attached to the filter membrane layer. The support layer with the attached adhesive particles is placed again in the take-up and unwinding device. At a certain take-up and unwinding speed, the solid adhesive is melted and then sprayed onto the adhesive-free side of the support layer between the take-up and unwinding rollers using a heated and heat-insulating spray device. Cold air is then sprayed parallel to the support layer on the side where the adhesive particles are attached. The nozzle diameter of the spray device is 0.05-0.5mm, the take-up and unwinding speed is 2-3m / min, and the cold air volume is 0.5-1.5m³ / min. 3 / min, the temperature of the cold air used is 20-28℃; Step 3, functional layer attachment: Place the support layer with the dust-holding layer adhesive particles and the filter membrane layer adhesive particles on the take-up and unwinding device. At a certain take-up and unwinding speed, spray antibacterial ingredients or traditional Chinese medicine solution or suspension on the surface of the support layer dust-holding layer adhesive particles between the take-up roller and the unwinding roller using an atomizing device. On the other side, hot air is sprayed parallel to the support layer. Step four, thermal lamination of materials: The three layers of materials, namely the dust-containing layer, the support layer, and the filter membrane layer, are placed in the laminating unit. The dust-containing layer is located on the side of the support layer where the dust-containing layer adheres to the adhesive particles, and the filter membrane layer is located on the other side of the support layer. At the same time, they pass through the gap between the hot roller and the pressure roller of the laminating unit and are laminated and then wound up under certain temperature and pressure.

2. The preparation process of a high-efficiency, low-resistance, multifunctional composite membrane air purification material according to claim 1, characterized in that, In step three, the nozzle diameter of the atomizing device is 0.1-0.4 mm, the winding and unwinding speed is 5-8 m / min, and the temperature of the hot air is 45-60℃.

3. The preparation process of a high-efficiency, low-resistance, multifunctional composite membrane air purification material according to claim 1, characterized in that, In step four, the composite temperature is 130-150℃, the composite speed is 1.5-2m / min, and the composite pressure is 0.1-0.5MPa.

4. A high-efficiency, low-resistivity, multifunctional composite membrane air purification material obtained by the preparation process according to any one of claims 1-3, characterized in that, It includes a dust-holding layer (1), dust-holding layer adhesive particles (2), a support layer (3), a filter membrane layer (4), filter membrane layer adhesive particles (5), and a functional layer (6); the dust-holding layer (1) is bonded to one side of the support layer (3) through the dust-holding layer adhesive particles (2), the filter membrane layer (4) is bonded to the other side of the support layer (3) through the filter membrane layer adhesive particles (5), and the functional layer (6) is located between the dust-holding layer (1) and the support layer (3).

5. The high-efficiency, low-resistance, multifunctional composite membrane air purification material according to claim 4, characterized in that, The dust-containing layer (1) has a thickness of 0.8-2mm and is made of PP meltblown cloth or PET filter cotton, which is composed of fiber stacking with a fiber diameter of 10-500μm.

6. The high-efficiency, low-resistance, multifunctional composite membrane air purification material according to claim 4, characterized in that, The adhesive particles (2) used in the dust-collecting layer are composed of EVA, and the particle size is 2-3 times the fiber diameter of the dust-collecting layer (1). The amount of adhesive particles (2) used in the dust-collecting layer is 10-20 g / m³. 2 .

7. The high-efficiency, low-resistance, multifunctional composite membrane air purification material according to claim 4, characterized in that, The filter membrane layer (4) has a thickness of 0.5-2μm and is made of one or more of PVDF, PAN, PA, PES, PU, ​​PLA, and PS. It is a filter membrane prepared by electrospinning or a filter membrane prepared by biaxial stretching of PTFE, with a fiber diameter of 10-500nm.

8. The high-efficiency, low-resistance, multifunctional composite membrane air purification material according to claim 4, characterized in that, The filter membrane adhesive particles (5) are composed of EVA, and the particle size is 0.8-1.2 times the diameter of the filter membrane fiber. The amount of filter membrane adhesive particles (5) is 3-8 g / m³. 2 .

9. The high-efficiency, low-resistance, multifunctional composite membrane air purification material according to claim 4, characterized in that, The functional layer (6) is prepared by spraying an antibacterial component or a solution or suspension of a traditional Chinese medicine component onto the support layer (3). The antibacterial component is one or more of inorganic antibacterial agents, organic antibacterial agents, or natural antibacterial agents. The inorganic antibacterial agent is a silver ion antibacterial agent or a copper ion antibacterial agent. The organic antibacterial agent is an acylaniline, imidazole, or thiazole antibacterial agent. The natural antibacterial agent is one or more of chitin, mustard, castor oil, or wasabi extract. The traditional Chinese medicine component is one or more of forsythia, honeysuckle, bupleurum, or houttuynia cordata extract.

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