Double-effect charcoal-clip cloth with regenerative function for air purifier and preparation method thereof

Abstract

The application relates to a double-effect carbon sandwich cloth with a regeneration function for an air purifier and a preparation method thereof, and comprises the following steps: S1, uniformly mixing TiO2, K2CO3 and La(NO3)3, impregnating the mixture in a metal acid solution after calcination, taking out and drying and activating to obtain a heat releasing material; S2, ball milling the heat releasing material obtained in S1 until uniform, and adding a dispersing agent to obtain a heat releasing material spraying liquid; S3, spraying the heat releasing material spraying liquid obtained in S2 on one side of polyester non-woven fabric for multiple times to obtain a heat releasing skeleton layer; and S4, sequentially laying a first hot melt adhesive net film, a first activated carbon layer and a second hot melt adhesive net film on the non-sprayed surface of the heat releasing skeleton layer obtained in S3, heat pressing and fixing, sequentially laying a second activated carbon layer, a third hot melt adhesive net film and a melt-blown cloth, heat pressing and forming to obtain the double-effect carbon sandwich cloth with the regeneration function for the air purifier. Compared with the prior art, the application provides a filter material with a regeneration function, prolongs the service life of the filter and reduces the cost of users.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification, and in particular to a double-effect carbon-containing cloth for an air purifier with a regeneration function and a preparation method thereof. Background Art

[0002] Adsorption utilizes porous solid adsorbents to treat gas mixtures, separating one or more components by adsorbing them onto the solid surface. Due to the adsorbent's high selectivity and separation efficiency, it can separate mixtures difficult to separate using other methods, effectively removing pollutants at very low concentrations. It boasts high purification efficiency, simple equipment, and easy operation. It is particularly suitable for purifying gaseous pollutants such as volatile organic compounds from indoor air.

[0003] Existing air purifier filters mainly rely on the adsorption function of activated carbon particles in the carbon cloth material to purify gaseous pollutants in the air. Such filters will become ineffective after adsorption saturation and may even cause secondary pollution to the use environment. Therefore, they need to be replaced regularly. Summary of the Invention

[0004] The purpose of the present invention is to overcome at least one of the above-mentioned defects of the prior art and to provide a double-effect carbon cloth for an air purifier with a regeneration function and a preparation method thereof.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] One of the purposes of the present invention is to provide a method for preparing a double-effect carbon cloth for an air purifier with a regeneration function, comprising the following steps:

[0007] S1, TiO2, K2CO3 and La(NO3)3 are mixed, calcined and immersed in a metal acid solution, taken out and dried and activated to obtain an exothermic material;

[0008] S2, ball-milling the exothermic material obtained in S1 until uniform, and then adding a dispersant to obtain an exothermic material spray liquid;

[0009] S3, spraying the exothermic material spray liquid obtained in S2 multiple times on one side of the receiving substrate to obtain an exothermic skeleton layer;

[0010] S4. The unsprayed surface of the exothermic skeleton layer obtained in S3 is sequentially laid with the first hot melt adhesive mesh, the first activated carbon layer, and the second hot melt adhesive mesh. After hot pressing and fixing, the second activated carbon layer, the third hot melt adhesive mesh, and the melt-blown cloth are sequentially laid, and hot pressing is performed to obtain a double-effect carbon-clamped cloth for an air purifier with a regeneration function.

[0011] Further, in S1, the Ti 2+ , K + and La3+ The molar ratio is (1~2):(5~7):(3~5).

[0012] Furthermore, in S1,

[0013] During the roasting process, the roasting temperature is 800-850°C and the roasting time is 1-2h;

[0014] During the impregnation process, Pt + The concentration is 0.3wt%-5wt%, and the pH is 5.5-6.5;

[0015] During the impregnation process, ultrasonic waves are used to assist the impregnation, with an ultrasonic temperature of 45-55°C and a power of 30-40kHz;

[0016] During the drying process, the drying temperature is 110-120°C and the time is 6-8 hours.

[0017] Furthermore, in S1, the activation operation is: calcining the dried material at 500° C. for 2-4 hours in an argon atmosphere with a heating rate of 5° C. / min.

[0018] Furthermore, in S3, the specific operation of spraying the exothermic material spray liquid on the receiving substrate multiple times is: spraying the exothermic material spray liquid on the spraying surface of the receiving substrate through a sprayer, drying at 70-110°C for 1-1.5h, and repeating the spraying multiple times to make the loading amount of the exothermic material on the receiving substrate greater than 20%.

[0019] Furthermore, in S4, the activated carbon in the first activated carbon layer is selected to be dominated by mesopores and have a specific surface area of ​​800-1000m 2 / g, iodine value of 800-1000mg / g, 10wt% KOH impregnated alkaline activated carbon with particle size of 0.25-0.60mm; the specific surface area of ​​the activated carbon in the second activated carbon layer is selected to be 1300-1600m 2 / g, microporous coconut shell activated carbon with a particle size of 0.18-0.25mm and an iodine value of 1000-1500mg / g.

[0020] Furthermore, in S4, the amount of activated carbon in the first activated carbon layer is 150-200 g / m 2 The amount of activated carbon in the second activated carbon layer is 80-100g / m 2 .

[0021] Further:

[0022] The receiving substrate has a gram weight of 70-90 g / m 2 Polyethylene terephthalate non-woven fabric;

[0023] The first hot melt adhesive web and the third hot melt adhesive web are composed of one or more of polyolefin, copolyester and polyamide, with a melting range of 80-120°C and a gram weight of 10-15g / m 2 ;

[0024] The second hot melt adhesive web is copolyester with a melting range of 80-120°C and a gram weight of 18-25g / m 2 , wherein copolyester preferably refers to polyethylene succinate (PES);

[0025] The meltblown cloth has a gram weight of 25g / m 2 Polypropylene non-woven fabric.

[0026] Furthermore, in S4, when laying the first activated carbon layer and the second activated carbon layer, a desktop conveyor is provided below the exothermic skeleton layer, and a high-voltage electrostatic powder sprinkler is provided above the exothermic skeleton layer to ensure that the activated carbon is evenly distributed on the exothermic skeleton layer;

[0027] The powder amount adjustment range of the high-voltage electrostatic powder sprinkler is 25%-35%, and the transmission frequency of the desktop conveyor is set to 15-20Hz.

[0028] Furthermore, the hot pressing temperature ranges from 130°C to 150°C.

[0029] The second object of the present invention is to provide a double-effect carbon cloth for an air purifier with a regeneration function, which is prepared by the preparation method described above.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] (1) The air purification material of the present invention can be removed after use and sprayed with anhydrous ethanol on the spray skeleton layer to achieve material regeneration, which is convenient to operate and environmentally friendly. After the ethanol is sprayed onto the surface of the skeleton material, an exothermic reaction occurs under the catalytic action of the coating, generating CO2 and gaseous H2O. The generated heat is transferred to the chemical adsorption layer, causing the temperature to rise, and the gaseous pollutants adsorbed in the activated carbon pores are desorbed, thereby regenerating the gas purification function of the air purification material.

[0032] (2) The catalytic layer uses the heat released by the catalytic reduction reaction as a heat source. The catalytic layer is directly sprayed onto the receiving substrate. The receiving substrate has both support and heat conduction functions, which can effectively reduce the heat loss during the heat conduction process, allowing more heat to be transferred to the adsorption layer, thereby improving the regeneration rate. Compared with metal wire mesh as a carrier and heat conduction layer, this material has a higher regeneration rate and better processability.

[0033] (3) The adsorption layer uses high iodine value activated carbon / modified carbon instead of ACF carbon cloth. Activated carbon has a rich pore structure. Compared with ACF, activated carbon of the same gram weight has a higher adsorption capacity. The composite filter material has a lower pressure drop and higher particle efficiency while also reducing the cost of the filter material.

[0034] (4) The middle layer of the carbon cloth material of the present invention uses a PES hot melt adhesive mesh with high rigidity and high toughness. The PES adhesive mesh can maintain stable mechanical properties while being hot-pressed and flow-formed, and has excellent strength and rigidity. It enhances the stiffness of the carbon cloth material while also allowing certain gaps to exist in the activated carbon layer, thereby increasing the effective contact area between the gas and the activated carbon layer and reducing the filtration resistance of the carbon cloth material to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is the toluene adsorption performance curve of the purification material sample of Example 1;

[0036] Figure 2 This is the sulfur dioxide adsorption performance curve of the purification material sample of Example 1;

[0037] Figure 3 is the resistance change curve of the purification material sample of Example 1;

[0038] Figure 4 This is the toluene adsorption performance curve of the purification material sample of Comparative Example 1;

[0039] Figure 5 This is the toluene adsorption performance curve of the purification material sample of Comparative Example 3. DETAILED DESCRIPTION

[0040] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0041] Example 1

[0042] This embodiment provides a double-effect carbon cloth for an air purifier with a regeneration function, comprising a superimposed exothermic skeleton layer and a chemical adsorption layer, and is prepared by the following steps:

[0043] Step 1: Preparation of exothermic skeleton layer

[0044] (1) Weigh Ti 2+ :K + :La 3+TiO2 / K2CO3 / La(NO3)3 with a molar ratio of 1.5:6:4 was mixed evenly and ground in a mortar until the materials were evenly mixed and the particles were fine. The powder was transferred to an alumina crucible and calcined in a muffle furnace at 800°C for 2h.

[0045] (2) preparing a 0.3 wt% chloroplatinic acid aqueous solution as an impregnation solution, immersing the above-mentioned material carrier in the chloroplatinic acid impregnation solution, and controlling the pH at 5.5-6.5; ultrasonic temperature 45 ° C, power 30 kHz; after the material is soaked until there is no color change, take it out, dry it at 120 ° C for 8 hours, and then transfer it to a tube furnace and roast it at 500 ° C for 4 hours under an Ar atmosphere to obtain an exothermic material; 10 parts by weight of the exothermic material, 1 part of polyvinyl alcohol and 20 parts of 0.5 mol / L nitric acid solution are mixed, nitric acid is added to adjust the pH to 6, and a slurry is formed by ball milling. The slurry D90 is measured by a particle size distribution instrument to be 102 nm, and an exothermic material spray liquid is obtained, which is transferred to a sprayer for standby use;

[0046] (3) The receiving substrate weight is 70-90g / m 2 The receiving substrate is fixed on the table with the sprayed surface facing up, a protective film is stacked on the unsprayed surface, and the skeleton surface is sprayed with a spray pump. After spraying, the receiving substrate is transferred to an oven at 70°C and dried for 1 hour. The above spraying and drying operations are repeated 3 times. The coating loading is calculated to be 20%, and the heat-releasing skeleton layer can be obtained.

[0047] Step 2: Preparation of double-effect carbon cloth for air purifier with regeneration function

[0048] (1) Laying a first hot melt adhesive mesh on the unsprayed layer of the heat-releasing skeleton layer receiving substrate and hot pressing and fixing it, then evenly laying a first activated carbon on the surface, laying a second layer of adhesive mesh on the first activated carbon layer and hot pressing and fixing it, and then sprinkling a second activated carbon on the mesh, then laying a third layer of hot melt adhesive mesh on the second activated carbon, and then superimposing a meltblown cloth on the third hot melt adhesive mesh,

[0049] The hot pressing temperature is controlled at 130℃; the first activated carbon is selected with a pore structure dominated by mesopores and a specific surface area of ​​800m 2 / g, iodine value of 800mg / g, particle size of 0.45-0.60mm and alkaline activated carbon impregnated with 10wt% KOH; the second activated carbon is selected with a specific surface area of ​​1500m 2 / g, particle size 0.20-0.25mm, iodine value of 1500mg / g microporous coconut shell activated carbon; the laying amount of the first activated carbon and the second activated carbon is 150g / m 2 , 80g / m 2 ; Meltblown fabric layer uses 25g / m 2Polypropylene (PP) meltblown nonwoven fabric; the first and third hot melt adhesive webs are 10g / m 2 Polyolefin (PO), melting temperature range is 95-105 ℃; the second hot melt adhesive web is 15g / m 2 of copolyester (PES).

[0050] (2) A desktop conveyor is set below the aggregate and a high-voltage electrostatic powder sprinkler is set above it to ensure that the activated carbon can be evenly distributed in the skeleton layer. The speed frequency of the desktop conveyor is 15 Hz.

[0051] (3) The above-mentioned sequentially stacked materials are pressed and formed by hot pressing to obtain a renewable carbon cloth material, wherein the hot pressing temperature is controlled at 130°C.

[0052] The carbon cloth material prepared above was cut into disc-shaped filter materials with a diameter of 112.9 mm and applied to the toluene gas filtration test. The toluene concentration was 80 ppm (air as the base gas), the surface wind speed was 0.1 m / s (the aggregate surface was facing the wind), the experimental environment was: temperature 25 ° C, relative humidity 50%, and the toluene removal efficiency at 5 min and 10 min was plotted as a function of time. Figure 1 middle.

[0053] The carbon cloth material prepared above was cut into disc-shaped filter materials with a diameter of 112.9 mm and applied to the SO2 gas filtration treatment test. The SO2 concentration was 80 ppm (air as the bottom gas), the surface wind speed was 0.1 m / s (the aggregate surface was facing the wind), the experimental environment was: temperature 25 ° C, relative humidity 50%, the SO2 removal efficiency at 5 min and 10 min, and the change curve of SO2 removal efficiency over time were shown in Figure 2 middle.

[0054] The carbon cloth prepared above was made into filters through folding and gluing, and placed in an air flow of 100m 3 / h、250m 3 / h test its pressure drop. Experimental environment: temperature 25 ℃, relative humidity 50%, the filter pressure drop under different air volume is as follows Figure 3 shown.

[0055] The carbon-clad cloth prepared above was tested for pressure drop and particle efficiency (@32 LPM) using a TSI8130A, thickness using a fabric thickness tester, and stiffness using a flexural stiffness tester. The experimental environment was 25°C and 50% relative humidity. The relevant physical properties are shown in Table 1.

[0056] The spent air purification material was removed and evenly sprayed with 11.2 mL of anhydrous ethanol on the skeleton surface. After spraying, it was placed vertically on a table for 30 minutes. It was then returned to the fixed bed and tested again. This "regeneration-test" cycle was repeated three times. During the regeneration process, the sample skeleton surface temperature reached a maximum of approximately 65°C, and a handheld VOC detector detected desorbed toluene concentrations of up to 400 ppm.

[0057] The performance results of the material adsorbing toluene after each regeneration are presented in Figure 1 As can be seen in the figure, the initial efficiency of the filter material drops to around 95% after one regeneration. This is because at the exothermic temperature, toluene molecules in the activated carbon pores can only be partially desorbed, leaving a small amount of toluene adsorbed within the material. After two and three regenerations, the material's toluene adsorption performance is essentially equivalent to that of a single regeneration, indicating that the air purification material has recovered its adsorption performance well after regeneration. Furthermore, after three regenerations, the material connection is secure, with no signs of delamination or separation.

[0058] Comparative Example 1

[0059] Compared with Example 1, the difference is that in step 1, the heating layer material is not immersed in a chloroplatinic acid aqueous solution, but is directly activated, and the rest remains unchanged.

[0060] After step 3, the prepared carbon cloth material was taken and cut into a disc filter material with a diameter of 112.9 mm. It was applied to the toluene gas filtration treatment test. The toluene concentration was 80 ppm (air as the bottom gas), the surface wind speed was 0.1 m / s (the aggregate surface was facing the wind), and the experimental environment was: temperature 25 ° C, relative humidity 50%. The toluene removal efficiency and toluene adsorption capacity at 5 min and 10 min (the toluene concentration downstream of the filter material reached 95% of the upstream concentration) are listed in Table 1. The change curve of toluene removal efficiency over time is shown in Table 1. Figure 4 middle.

[0061] The spent air purification material was removed and evenly sprayed with 11.2 mL of anhydrous ethanol on the skeleton surface. After spraying, it was placed vertically on a table for 30 minutes. It was then returned to the fixed bed and tested again. This "regeneration-test" cycle was repeated three times. During the regeneration process, the sample skeleton surface temperature reached a maximum of approximately 40°C. A handheld VOC detector detected desorbed toluene concentrations of up to 200 ppm.

[0062] The presence of Pt active sites can increase the migration rate of photoelectrons and enhance the effective exothermic reaction. However, the addition of the coating weakened the catalytic exothermic effect, and the adsorption layer did not fully desorb toluene. When the regenerated material was placed back into the fixed bed and retested, toluene adsorption performance weakened, indicating poor reproducibility.

[0063] Comparative Example 2

[0064] Compared with Example 1, in step 2, the air purification material after use is taken out, and 11.2 mL of 75% ethanol is used to evenly spray the skeleton layer. After spraying, it is placed vertically on the table for 30 minutes, and then put back into the fixed bed for testing again. This "regeneration-test" is repeated 3 times, and the rest remains unchanged.

[0065] After step 3, the prepared carbon cloth material was taken and cut into a disc-shaped filter material with a diameter of 112.9 mm. It was applied to a toluene gas filtration test with a toluene concentration of 80 ppm (air as the bottom gas), a face wind speed of 0.1 m / s (the aggregate surface was facing the wind), and an experimental environment of 25°C and 50% relative humidity. The toluene removal efficiency and toluene adsorption capacity at 5 and 10 minutes were shown in Table 1 (the toluene concentration downstream of the filter material reached 95% of the upstream concentration). The air purification material after the above-mentioned use failure was taken out and regenerated. During the regeneration process, the surface temperature of the sample aggregate surface was detected to be as high as about 50°C. The desorbed toluene concentration could be detected by a handheld VOC detector to be as high as 200 ppm. This is because water molecules and ethanol are competitively adsorbed on the surface of the regenerated material. The presence of water molecules will weaken the exothermic reaction of the regenerated material, thereby making the desorption of toluene from the adsorption layer insufficient. The regenerated material was returned to the fixed bed and retested for toluene adsorption performance, which was weakened and had poor reproducibility.

[0066] Comparative Example 3

[0067] Compared with Example 1, the difference is that in step 2, the laying amount of the first and second activated carbons is 200 g / m 2 , 100g / m 2 , the rest remain unchanged.

[0068] After step 3, the prepared carbon cloth material is taken out and cut into a disc-shaped filter material with a diameter of 112.9 mm. It is applied to the toluene gas filtration treatment test. The toluene concentration is 80 ppm (air is the bottom gas), the surface wind speed is 0.1 m / s (the aggregate surface faces the wind), and the experimental environment is: temperature 25 ° C, relative humidity 50%, the toluene removal efficiency and adsorption capacity at 5 minutes and 10 minutes are shown in Table 1. The air purification material after use is taken out and regenerated. The operation is repeated 3 times. The material after each regeneration is tested for toluene adsorption performance. The results are as follows Figure 5 It shows that compared with the initial sample, the adsorption efficiency of the first regenerated material is poor. This is because the carbon cloth filter material layer is thicker, and the heat generated by the skeleton layer cannot be transferred to the entire activated carbon layer, which causes the regeneration performance to decline.

[0069] Comparative Example 4

[0070] Compared with Example 1, the difference is that the activated carbon in step 2 is replaced with activated carbon fiber ACF of the same gram weight, and the rest remains unchanged.

[0071] After step 3, the prepared carbon-clad fabric was tested for pressure drop and particle efficiency (@32 LPM) using a TSI 8130A, thickness using a fabric thickness tester, and bending stiffness using a flexural stiffness tester. Table 1 shows that compared to the sample in Example 1, this sample exhibited significantly increased resistance and thickness. This is because ACF, at equivalent weight, has higher resistance and thickness than activated carbon, resulting in a slower gas adsorption efficiency in the sample in Comparative Example 4.

[0072] Comparative Example 5

[0073] Compared with Example 1, the difference is that in step 1, the catalytic layer is sprayed onto the metal mesh, and then the adsorption layer and the metal mesh are hot-pressed in sequence, and the rest remains unchanged.

[0074] After step 3, the prepared carbon-reinforced cloth material was tested for pressure drop and particle efficiency (@32 LPM) using a TSI 8130A, thickness using a fabric thickness tester, and bending stiffness using a flexural stiffness tester. The results, as shown in Table 2, show that compared to the sample in Example 1, this sample exhibits reduced resistance. However, the presence of the wire mesh significantly increases the stiffness of the filter material, resulting in poor subsequent processability.

[0075] Table 1 Toluene adsorption efficiency

[0076]

[0077]

[0078] Table 2 Physical properties

[0079] Resistance / pa efficiency Thickness / mm Push force / mN Example 1 26 99.1％ 1.60 67.332 Comparative Example 4 40 99.0％ 2.10 74.491 Comparative Example 5 24 98.0％ 1.65 98.807

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other manner. Any person skilled in the art may utilize the above-disclosed technical content to modify or modify the present invention into equivalent embodiments. However, any simple modifications, equivalent variations, and modifications to the above embodiments that do not depart from the technical content of the present invention and are based on the technical essence of the present invention remain within the scope of protection of the present invention.

Claims

1. A method for preparing a double-effect carbon cloth for an air purifier with a regeneration function, characterized in that: The steps include: S1. TiO2, K2CO3 and La(NO3)3 are mixed, calcined and immersed in a metal acid solution, taken out, dried and activated to obtain an exothermic material; S2, ball-milling the exothermic material obtained in S1 until uniform, and then adding a dispersant to obtain an exothermic material spray liquid; S3, spraying the exothermic material spray liquid obtained in S2 multiple times on one side of the receiving substrate to obtain an exothermic skeleton layer; S4, laying the first hot melt adhesive mesh, the first activated carbon layer, and the second hot melt adhesive mesh on the unsprayed surface of the heat-releasing skeleton layer obtained in S3 in sequence, and after hot pressing and fixing, laying the second activated carbon layer, the third hot melt adhesive mesh, and the melt-blown cloth in sequence, and hot pressing and forming, to obtain a double-effect carbon-containing cloth for an air purifier with a regeneration function; In S1, the metal acid solution is a chloroplatinic acid aqueous solution, Pt + The concentration is 0.3wt%-5wt%; In S1, Ti 2+ , K + and La 3+ The molar ratio is (1~2): (5~7): (3~5).

2. The method for preparing a double-effect carbon cloth for an air purifier with a regeneration function according to claim 1, characterized in that: In S1, During the roasting process, the roasting temperature is 800-850°C and the roasting time is 1-2h; During the impregnation process, the pH of the metal acid solution is 5.5-6.5; During the impregnation process, ultrasonic waves are used to assist the impregnation, with an ultrasonic temperature of 45-55°C and a power of 30-40kHz; During the drying process, the drying temperature is 110-120°C and the time is 6-8 hours.

3. The method for preparing a double-effect carbon cloth for an air purifier with a regeneration function according to claim 1, characterized in that: In S1, the activation operation is: calcining the dried material at 500° C. for 2-4 h in an argon atmosphere with a heating rate of 5° C. / min.

4. The method for preparing a double-effect carbon cloth for an air purifier with a regeneration function according to claim 1, characterized in that: In S3, the specific operation of spraying the exothermic material spray liquid on the receiving substrate multiple times is: spraying the exothermic material spray liquid on the spraying surface of the receiving substrate through a sprayer, drying at 70-110°C for 1-1.5h, and repeating the spraying multiple times to make the loading amount of the exothermic material on the receiving substrate greater than 20%.

5. The method for preparing a double-effect carbon cloth for an air purifier with a regeneration function according to claim 1, characterized in that: In S4, the specific surface area of ​​the activated carbon in the first activated carbon layer is 800-1000m 2 / g, iodine value of 800-1000 mg / g, and particle size of 0.25-0.60 mm, and alkaline activated carbon impregnated with 10wt% KOH.

6. The method for preparing a double-effect carbon cloth for an air purifier with a regeneration function according to claim 1, characterized in that: In S4, the specific surface area of ​​the activated carbon in the second activated carbon layer is selected to be 1300-1600m 2 / g, particle size 0.18-0.25mm, and iodine value of 1000-1500 mg / g microporous coconut shell activated carbon.

7. The method for preparing a double-effect carbon cloth for an air purifier with a regeneration function according to claim 1, characterized in that: In S4, the amount of activated carbon laid in the first activated carbon layer is 150-200 g / m 2 The amount of activated carbon in the second activated carbon layer is 80-100g / m 2 .

8. The method for preparing a double-effect carbon cloth for an air purifier with a regeneration function according to claim 1, characterized in that: The receiving substrate has a gram weight of 70-90 g / m 2 Polyethylene terephthalate non-woven fabric; The first hot melt adhesive web and the third hot melt adhesive web are composed of one or more of polyolefin, copolyester and polyamide, with a melting range of 80-120°C and a gram weight of 10-15g / m 2 ; The second hot melt adhesive web is copolyester with a melting range of 80-120°C and a gram weight of 18-25g / m 2 ; The meltblown cloth has a gram weight of 20-30 g / m 2 Polypropylene non-woven fabric.

9. The method for preparing a double-effect carbon cloth for an air purifier with a regeneration function according to claim 8, characterized in that: The meltblown cloth has a gram weight of 25g / m 2 Polypropylene non-woven fabric.

10. A double-effect carbon cloth for air purifier with regeneration function, characterized in that: The invention discloses a novel cellulose acetate resin composition comprising the steps of claim 1 , wherein the cellulose acetate resin composition comprises the steps of:

Images