Preparation method of carbon black standard pollution cloth

Abstract

The invention discloses a preparation method of carbon black standard pollution cloth, which comprises the following steps: (1) boiling off sample cloth which is subjected to desizing treatment and cut according to requirements at high temperature, carrying out secondary desizing treatment, and finally ironing the sample cloth to be dry; (2) preparing a carbon black pollution solution, namely uniformly mixing the following components in parts by mass: 1.05 to 1.15 parts of peregal O-25, 1.9 to 2.1 parts of carbon black powder, 5.9 to 6.1 parts of gum arabic powder, 6.9 to 7.1 parts of sodium carboxymethyl cellulose and 1250 to 1300 parts of soft water, so as to prepare a basic pollution solution, wherein the basic pollution solution is prepared from 1.05 to 1.15 parts of peregal O-25, 1.9 to 2.1 parts of carbon black powder, 5.9 to 6.1 parts of gum arabic powder, 6.9 to 7.1 parts of sodium carboxymethyl cellulose and 1250 to 1300 parts of soft water; and then adding soft water preheated to 60-65 DEG C into the basic pollution liquid until the pollution liquid reaches 2000 parts by mass, thereby obtaining the carbon black pollution liquid, (3) sample cloth dyeing: adding soft water into the carbon black pollution liquid to prepare a diluted pollution liquid; pouring the diluted pollution liquid into an enamel plate, clamping the sample cloth with tweezers, and immersing the sample cloth into the diluted pollution liquid from the front end of the enamel plate for pull dyeing; and clamping the dyed polluted cloth for steaming, and then putting the steamed polluted cloth into a moisture-proof cabinet for drying.

Description

Technical Field

[0001] The invention relates to the technical field of standard contaminated cloth, and in particular to a method for preparing a carbon black standard contaminated cloth. Background Art

[0002] The energy efficiency label is an information label attached to the product or the smallest packaging of the product, which is used to indicate the energy efficiency level, energy consumption and other indicators of energy-using products. It is divided into five levels from high to low according to energy efficiency: 1, 2, 3, 4, and 5. Among them, the energy efficiency level of a washing machine is evaluated based on three indicators: power consumption, water consumption and wash ratio.

[0003] In actual testing, the three indicators of washing machine power consumption, water consumption and wash ratio are interrelated and affect each other. The increase of one indicator value is likely to lead to the decrease of other indicators. The energy efficiency rating value indicated on the energy efficiency label will take the lowest level of these three indicators. In other words, although the energy efficiency rating of a washing machine is a direct reflection of power consumption, it contains more than just a power consumption indicator, but a comprehensive indicator.

[0004] At present, the water and electricity consumption detection equipment is relatively mature and has high accuracy, which can effectively test the water and electricity consumption of washing machines. However, the test of the cleaning ratio needs to reflect the test value of the washing machine cleaning ratio based on the reflectivity of the corresponding standard contaminated cloth before and after washing, which is affected by the parameters of the standard contaminated cloth. Therefore, Appendix D of GB / T 4288-2018 "Electric Washing Machines for Household and Similar Purposes" stipulates that the quality of carbon black standard contaminated cloth must meet the following requirements: the reflectivity value of each test point of the standard contaminated cloth should be within the range of 20-30%, and the relative deviation of each batch of standard contaminated cloth from the median value of the same batch of standard contaminated cloth should be within the range of ±2.5%.

[0005] Appendix D of GB / T 4288-2018 "Electric washing machines for household and similar purposes" also discloses a method for preparing a carbon black standard contaminated cloth, including: ① Preparation of contaminated liquid: weigh 1.2g of tallow hardened oil and 3.7g of liquid paraffin in a small beaker, heat and melt them, then add 1.5g of carbon black, stir evenly with a glass rod (for not less than 10 minutes), and pour into a flask; weigh a chemical solvent (chemically pure) or deionized water, put 2 / 3 of it into a flask, use the remaining 1 / 3 to wash the residue in the small beaker, pour the washing liquid into the same flask, stir for about 30 minutes, and then prepare the contaminated liquid; ② Preparation of standard contaminated cloth: place the enamel plate sideways on the workbench, pour the prepared contaminated liquid into it, and clamp the two ends of one side of the prepared dry cloth with clips respectively; hold the clips to drag the cloth through the contaminated liquid, and then hang it up to dry naturally; dyeing is carried out at room temperature, and a standard contaminated cloth machine can be used for continuous contamination.

[0006] However, the preparation method of the above-mentioned carbon black standard contaminated cloth has the following problems:

[0007] 1) The specific preparation operations and parameters of the contaminated liquid and the standard contaminated cloth are not clear, such as the amount of chemical solvent or deionized water, the stirring time, etc., which makes it difficult for the prepared carbon black standard contaminated cloth to meet the above quality requirements and the yield is extremely low; therefore, the testing agency or laboratory usually purchases the carbon black standard contaminated cloth directly from the market;

[0008] 2) Due to the different preparation processes and parameters adopted by different manufacturers on the market, the parameters of the standard contaminated cloth they produce vary, which affects the stability of the washing machine cleaning performance test results;

[0009] Furthermore, the current price of 120×60mm carbon black standard pollution cloth is 20 to 30 yuan per piece. Taking a 10kg washing machine as an example, a cleaning performance test requires at least 162 pieces of standard pollution cloth, which means at least 3,240 yuan is spent to purchase standard pollution cloth. The larger the capacity of the washing machine, the greater the amount of standard pollution cloth used, which leads to high cleaning performance test costs. Moreover, since the purchase cycle of standard pollution cloth is generally not less than 10 days, the cleaning performance test cycle of the washing machine is increased, thereby increasing the test cost.

[0010] 3) The tallow hardened oil and chemical solvents in the formula of the above-mentioned contaminated liquid are toxic to a certain extent, and the contaminated liquid produced has a pungent odor, which affects the health of producers and testers to a certain extent. Summary of the invention

[0011] The object of the present invention is to provide a method for preparing a carbon black standard contaminated cloth, so as to ensure that the carbon black standard contaminated cloth meets the quality requirements, thereby improving the yield rate and improving the stability of the washing machine cleaning performance test results.

[0012] To achieve the above objectives, the present invention adopts the following technical solutions.

[0013] A method for preparing a carbon black standard contaminated cloth comprises the following steps:

[0014] (1) Pretreatment of sample fabric: the sample fabric that has been desizing and cut as required is placed under high temperature for scouring; the scouring sample fabric is placed in a stirring reference machine for secondary desizing; finally, the sample fabric is ironed dry;

[0015] (2) Preparation of carbon black contaminated liquid: first, the following components are mixed evenly to prepare a basic contaminated liquid: 1.05-1.15 parts by mass of Peregal O-25, 1.9-2.1 parts by mass of carbon black powder, 5.9-6.1 parts by mass of gum arabic powder, 6.9-7.1 parts by mass of sodium carboxymethyl cellulose, and 1250-1300 parts by mass of soft water; then, soft water preheated to 60-65° C. is added to the basic contaminated liquid until the contaminated liquid reaches 2000 parts by mass, thereby preparing the carbon black contaminated liquid;

[0016] (3) dyeing a sample cloth: adding soft water to the carbon black contaminated liquid obtained in step (2) at a mass ratio of 1:5 to obtain a diluted contaminated liquid; pouring the diluted contaminated liquid into an enamel tray, clamping the top edge of the sample cloth with tweezers, and immersing it from the front end of the enamel tray into the diluted contaminated liquid, and dyeing it along the rear end of the enamel tray; clamping the contaminated cloth obtained by dyeing, steaming it, and then placing it in a moisture-proof cabinet for drying.

[0017] The present invention can dye the sample cloth evenly through the above method, ensuring that the carbon black standard contaminated cloth meets the quality requirements. The specific principle is:

[0018] ① The present invention performs scouring and secondary desizing treatment on the sample cloth, so that the dye can better penetrate into the fiber, thereby improving the color fastness and making the sample cloth dyeing more uniform and durable;

[0019] ② The present invention prepares a carbon black contaminated liquid with good stability by matching various components and their dosages. The carbon black contaminated liquid has weak coagulation at room temperature, so that the sample cloth has a high coloring rate and good coloring uniformity, thereby ensuring the quality of the carbon black standard contaminated cloth;

[0020] Among them, the present invention selects Peregrine O-25 as a leveling agent and a diffusing agent to increase the dyeing fastness of the carbon black standard contaminated cloth, make it bright and uniform in color, and remove the dirt dispersed and gathered on the fabric, solve the dirt accumulated by the sample cloth (carbon black standard contaminated cloth) contacting with dust and other impurities in the air, and improve the quality stability of the carbon black standard contaminated cloth; and the use of soft water can make the contaminated liquid have fewer impurities, so that the contaminated cloth after dyeing is smooth and flat, and the performance is stable, so that the error of the cleaning performance test is small;

[0021] In addition, the carbon black contaminated liquid prepared by the present invention has no irritating odor, and each component is non-toxic and harmless;

[0022] ③ The present invention adds soft water preheated to 60-65° C. in the last step of preparing the carbon black contaminated liquid to remove bubbles generated during the preparation process and improve dyeing uniformity.

[0023] Preferably, in step (1), the scouring temperature is 220-260° C. and the time is 40-60 min; and 0.05-0.2 g a-amylase is added per kilogram of sample cloth during the desizing treatment.

[0024] Preferably, in step (2), the preparation operation of the basic contaminated liquid is as follows: first weigh Pingpingjia O-25, carbon black powder, and gum arabic powder, add a small amount of soft water, stir with a glass rod for 60 seconds, then pour into a blender and stir at a speed of 16000r / min for 120 seconds, and stir twice; then add sodium carboxymethyl cellulose to the mixed solution in the blender, stir at a speed of 8000r / min, and slowly add the remaining soft water preheated to 60-65°C after stirring for 90 seconds to avoid liquid splashing; after the water is added, adjust the blender to 24000r / min, continue stirring for 30 seconds, and obtain the basic contaminated liquid. The present invention further reduces the misoperation rate and ensures the quality of the carbon black standard contaminated cloth by finely preparing the contaminated liquid; wherein, in the above operation, the purpose of preheating the soft water to 60-65°C in the present invention is to accelerate the dissolution of the dye, reduce the stratification of the dye, and help improve the dyeing uniformity of the sample cloth.

[0025] Furthermore, in step (2), the carbon black contaminated liquid is placed in a constant temperature oscillator and oscillated for 30 minutes to remove bubbles therein and improve the uniformity of the dyed sample fabric. The temperature in the constant temperature oscillator is preferably set to 60-65°C.

[0026] Preferably, in step (3), the sample cloth is dried at 105° C. for 3 hours before dyeing to ensure that the sample cloth is dry and is conducive to subsequent dyeing.

[0027] Preferably, in step (3), the sample fabric is stretched and dyed within 1.5 seconds, and the temperature during dyeing is 23±2° C. and the humidity is 60±10%.

[0028] Preferably, in step (3), the steaming temperature is 115-125° C. and the pressure is 98-102 kPa; the drying time is 7-10 days, the temperature in the moisture-proof cabinet is 23±5° C., and the humidity is 60±5%.

[0029] Furthermore, in step (3), the dried contaminated cloth is placed at room temperature for 24 hours for natural rehydration, thereby improving the quality stability of the carbon black standard contaminated cloth and extending the shelf life of the carbon black standard contaminated cloth. Preferably, the room temperature is 25±3°C and the humidity is 60±15%.

[0030] Furthermore, the carbon black standard contaminated cloth after regaining moisture is packed in a vacuum bag and stored at a temperature of -20 to 5°C and a humidity of 30 to 50%, thereby improving the quality stability of the carbon black standard contaminated cloth during storage and extending the shelf life of the carbon black standard contaminated cloth.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The preparation method of the carbon black standard contaminated cloth provided by the present invention can ensure that the prepared carbon black standard contaminated cloth meets the quality requirements, that is, the reflectivity value of each test point of the standard contaminated cloth should be within the range of 20% to 30%, and the relative deviation of each batch of standard contaminated cloth from the median value of the same batch of standard contaminated cloth should be within the range of ±2.5%; therefore, the finished product rate of the present invention is greater than 99%, and the reflectivity uniformity between the finished products is good, thereby improving the stability of the washing machine cleaning performance test results.

[0033] Therefore, by adopting the method of the present invention to prepare carbon black standard contaminated cloth, the cost can be reduced to 3 to 5 yuan per piece, and the cost saving range is 75 to 90%. In addition, the purchase cycle of carbon black standard contaminated cloth is eliminated, thereby shortening the washing machine performance test cycle, increasing the stability of the standard substance contaminated cloth in the test, and reducing the test errors caused by the production of contaminated cloth by different manufacturers in the past, which can effectively promote the development of the washing machine industry; and the carbon black standard contaminated cloth prepared by the present invention has a shelf life of not less than 180 days, so that its production frequency is reduced, which is conducive to further reducing the acquisition cost of standard carbon black contaminated cloth in washing machine energy efficiency testing.

[0034] The method of the present invention is scientific and reasonable, and the operation steps are clear, so that it is highly reproducible. Those skilled in the art can quickly prepare a carbon black standard contaminated cloth that can be used for washing machine cleaning performance testing according to the method.

[0035] In addition, the method of the present invention also provides an improvement idea for the preparation of other types of standard contaminated cloths, such as protein standard contaminated cloths, sebum standard contaminated cloths, blood stain standard contaminated cloths, wine stain standard contaminated cloths and chocolate standard contaminated cloths, thereby improving the stability of the results of washing machine tests. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Example 1

[0038] (1) Pretreatment of sample fabric:

[0039] ① Select the sample cloth according to the requirements of Appendix D of GB / T 4288-2018, specifically: bleached medium plain cloth that meets the relevant requirements of GB / T 411, with warp yarns of 21±2 counts, weft yarns of 21±2 counts, and the original cloth reflectivity should be 86% to 92%; put the bleached medium plain cloth into a stirring reference machine and immerse it in water for desizing, wherein 0.1g a-amylase is added per kilogram of cloth as a detergent; then cut the desizing cloth into 240mm×250mm sample cloth, carefully iron it, dry it at 105±5℃ for 3h, and store it in a drying container for use.

[0040] ②Put the sample fabric in a high pressure scouring pot at 240℃, immerse it in water, and scour for 40 minutes;

[0041] ③ Place the scour sample cloth into a stirring reference machine and immerse it in water for desizing, adding 0.2g a-amylase per kilogram of cloth as a detergent;

[0042] ④ Iron the desizing sample fabric dry and set aside for later use.

[0043] (2) Preparation of carbon black contaminated liquid:

[0044] ① Prepare the components of the carbon black contaminated liquid according to Table 1, and grind the solid components into powder, preferably to a particle size of less than 100 μm;

[0045] Table 1

[0046]

[0047]

[0048] ② In a 500mL beaker, add 1.1g of Peregrine O-25, 2.0g of carbon black powder, 6.0g of gum arabic powder, and 225g of soft water in sequence, stir with a glass rod for 60s, pour into a blender, stir at a speed of 16000r / min for 120s, and stir twice; then add 7.0g of sodium carboxymethyl cellulose to the mixed solution stirred by the blender, stir at a speed of 8000r / min, and slowly add 1050g of soft water preheated to 60°C after stirring for 90s. In this embodiment, the addition is completed within 15s; after adding water, adjust the blender speed to 24000r / min, continue stirring for 30s, and obtain a basic contaminated liquid;

[0049] ③ Pour the prepared basic contaminated liquid into an enamel dish and add soft water preheated to 60°C to make the mass of the contaminated liquid reach 2000g, thus obtaining the carbon black contaminated liquid;

[0050] ④Put the carbon black contaminated liquid into a bottle and put it into a constant temperature oscillator set at 60℃ for 30 minutes for standby use.

[0051] (3) Dyeing sample fabric:

[0052] ① Place the sample fabric treated in step (1) into a UN55 plus natural convection dryer and dry at 105°C for 3 hours;

[0053] ② Take out the carbon black contaminated liquid, add soft water at a mass ratio of carbon black contaminated liquid: soft water = 1:5 to obtain a diluted contaminated liquid;

[0054] ③ Pour the diluted contaminated liquid into the enamel tray, take out the dried sample cloth, clamp the top edge of the sample cloth with tweezers, and immerse it in the contaminated liquid from the front end of the enamel tray. The sample cloth is pulled and dyed along the rear end of the enamel tray within 1 second, and then the contaminated cloth is clamped; the whole pulling and dyeing operation is completed within 1.5 seconds. The temperature during dyeing is 23±2℃ and the humidity is 60±10%. If there is foam in the contaminated liquid during dyeing, it is necessary to remove the floating residue on the surface of the contaminated liquid in time;

[0055] ④ Steam the dyed contaminated cloth at 120℃, 102kPa for 2 minutes, then stack them neatly and place them in a moisture-proof cabinet (temperature: 23±5℃, humidity: 60±5%) to dry for one week;

[0056] ⑤ Take out the dried contaminated cloth and place it at room temperature (25±3℃, 60±15%) for 24 hours to allow it to naturally regain moisture; then cut it into 60mm×120mm specifications and package it in a vacuum bag to obtain a carbon black standard contaminated cloth.

[0057] Two batches of carbon black standard contaminated cloth were prepared according to the above steps, and 50 samples were taken from each batch; then, according to the content of reflectivity measurement of standard contaminated cloth in Appendix C of GB / T 4288-2018, the reflectivity of the samples was tested with a spectrophotometer in an environment of temperature 23±2°C and relative humidity of 60-70% (each sample was tested twice). The results are shown in Table 2.

[0058] Table 2

[0059]

[0060]

[0061] The uniformity of the reflectivity of the samples in Table 2 was tested using the Ss≤0.3σ criterion, and the results are shown below.

[0062] Table 3

[0063] Sources of variance variance Degrees of Freedom Mean Square Sample room 93.62 99 0.9457 In the sample 77.68 100 0.7768

[0064] Ss=[(0.9457-0.7768) / 2]0.5=0.2906%

[0065] σ=1.6%0.3σ=0.4800%

[0066] The results show that the reflectivity of the two batches of carbon black standard contaminated cloth samples is uniform, satisfying the Ss≤0.3σ criterion.

[0067] The above results indicate that the carbon black standard contaminated cloth prepared by the method of the present invention not only meets the quality requirement that the reflectivity should be within the range of 20 to 30%, but also has high reflectivity uniformity. Specifically, the relative deviation between the median value of the standard contaminated cloth and the standard contaminated cloth of the same batch is within the range of ±1.5%. Furthermore, according to the Ss≤0.3σ criterion, the reflectivity of the carbon black standard contaminated cloth prepared from the same batch and different batches is also uniform. Therefore, the carbon black standard contaminated cloth prepared by the present invention can improve the stability of the washing machine cleaning ratio test results.

[0068] Example 2

[0069] The carbon black standard contaminated cloth prepared in Example 1 was stored at a temperature of -20 to 5°C and a humidity of 30 to 50% for 180 days, and then 50 samples were randomly selected from each of the two batches to test their reflectivity. The results are shown in Table 4.

[0070] Table 4

[0071]

[0072]

[0073] The above results show that the carbon black standard contaminated cloth prepared by the method of the present invention still meets the quality requirement of a reflectivity within the range of 20-30% after being stored for 180 days, and can meet the requirements of the washing machine cleaning performance test.

[0074] Example 3

[0075] 24 samples were taken from the carbon black standard contaminated cloth prepared in Example 1 and divided into two groups. The cleaning performance test of the washing machine was carried out in accordance with Appendix C of GB / T4288-2018. The results are shown in Tables 5 and 6.

[0076] a) The test is carried out in an environment with a temperature of 23±2℃ and a relative humidity of (60~70)%;

[0077] b) Test objects: agitator reference washing machine, drum reference washing machine.

[0078] Table 5 Cleaning efficiency of stirring reference washing machine

[0079]

[0080]

[0081] Table 6 Washing efficiency of drum type reference washing machine

[0082] Sample No. Test value 1(%) Test value 2 (%) 1 39.66 40.70 2 39.86 40.99 3 38.31 38.52 4 38.61 38.10 5 39.68 38.31 6 38.64 39.32 7 40.34 39.52 8 38.49 39.85 9 38.26 40.84 10 40.19 38.74 11 39.08 39.97 12 39.46 40.15

[0083] The uniformity of the cleaning rates of the agitator reference washing machine and the drum reference washing machine was analyzed, and the results are shown below.

[0084] Table 7 Analysis results of cleaning rate uniformity of stirring reference washing machine

[0085] Sources of variance variance Degrees of Freedom Mean Square Sample room 9.8859 11 0.8987 In the sample 5.9578 12 0.4965

[0086] Ss=[(0.8987-0.4965) / 2]0.5=0.448%

[0087] σ=1.6%0.3σ=0.480%

[0088] The Ss≤0.3σ criterion is met and the cleaning rate of the samples is uniform when tested with a stirring reference washing machine.

[0089] Table 8 Analysis results of cleaning rate uniformity of drum type reference washing machine

[0090] Sources of variance variance Degrees of Freedom Mean Square Sample room 9.2037 11 0.8367 In the sample 8.7756 12 0.7313

[0091] Ss=[(0.8367-0.7313) / 2]0.5=0.230%

[0092] σ=1.6%0.3σ=0.480%

[0093] The Ss≤0.3σ criterion is met and the cleaning rate of the samples is uniform when tested by a drum reference washing machine.

[0094] The above results show that the carbon black standard contaminated cloth prepared by the method of the present invention can improve the stability of the washing machine cleaning rate test results and ensure the accuracy and effectiveness of the test.

Claims

1. A method for preparing a carbon black standard contaminated cloth, characterized in that: The following steps are involved: (1) Pretreatment of sample fabric: the sample fabric that has been desizing and cut as required is placed under high temperature for scouring; the scouring sample fabric is placed in a stirring reference machine for secondary desizing; finally, the sample fabric is ironed dry; (2) Preparation of carbon black contaminated liquid: first, the following components are mixed evenly to prepare a basic contaminated liquid: 1.05-1.15 parts by mass of Peregal O-25, 1.9-2.1 parts by mass of carbon black powder, 5.9-6.1 parts by mass of gum arabic powder, 6.9-7.1 parts by mass of sodium carboxymethyl cellulose, and 1250-1300 parts by mass of soft water; then, soft water preheated to 60-65° C. is added to the basic contaminated liquid until the contaminated liquid reaches 2000 parts by mass, thereby preparing the carbon black contaminated liquid; (3) dyeing a sample cloth: adding soft water to the carbon black contaminated liquid obtained in step (2) at a mass ratio of 1:5 to obtain a diluted contaminated liquid; pouring the diluted contaminated liquid into an enamel tray, clamping the top edge of the sample cloth with tweezers, and immersing it from the front end of the enamel tray into the diluted contaminated liquid, and dyeing it along the rear end of the enamel tray; clamping the contaminated cloth obtained by dyeing, steaming it, and then placing it in a moisture-proof cabinet for drying.

2. The method for preparing the carbon black standard contaminated cloth according to claim 1, characterized in that: In step (1), the scouring temperature is 220-260° C. and the time is 40-60 min. During the desizing treatment, 0.05-0.2 g of a-amylase is added per kilogram of sample cloth.

3. The method for preparing the carbon black standard contaminated cloth according to claim 2, characterized in that: In step (2), the preparation operation of the basic contaminated liquid is as follows: first weigh PEI O-25, carbon black powder, and gum arabic powder, add a small amount of soft water, stir with a glass rod for 60 seconds, then pour into a blender and stir at a speed of 16000 r / min for 120 seconds, and stir twice; then add sodium carboxymethyl cellulose to the mixed liquid in the blender, stir at a speed of 8000 r / min, and slowly add the remaining soft water preheated to 60-65°C after stirring for 90 seconds to avoid splashing of the liquid; after the water is added, adjust the blender to 24000 r / min, and continue stirring for 30 seconds to obtain the basic contaminated liquid.

4. The method for preparing the carbon black standard contaminated cloth according to claim 3, characterized in that: In step (2), the carbon black contaminated liquid is placed in a constant temperature oscillator and oscillated for 30 minutes.

5. The method for preparing the carbon black standard contaminated cloth according to claim 4, characterized in that: In step (3), the sample cloth is dried at 105°C for 3 hours before dyeing.

6. The method for preparing the carbon black standard contaminated cloth according to claim 5, characterized in that: In step (3), the sample fabric is stretched and dyed within 1.5 seconds, and the temperature during dyeing is 23±2° C. and the humidity is 60±10%.

7. The method for preparing the carbon black standard contaminated cloth according to claim 6, characterized in that: In step (3), the steaming temperature is 115-125° C. and the pressure is 98-102 kPa.

8. The method for preparing the carbon black standard contaminated cloth according to claim 7, characterized in that: In step (3), the drying time is 7 to 10 days, the temperature in the moisture-proof cabinet is 23±5° C., and the humidity is 60±5%.

9. The method for preparing the carbon black standard contaminated cloth according to claim 8, characterized in that: In step (3), the dried contaminated fabric is placed at room temperature for 24 hours to allow natural moisture recovery; the room temperature conditions are 25±3°C and 60±15%.

10. The method for preparing the carbon black standard contaminated cloth according to claim 9, characterized in that: The carbon black standard contaminated cloth after moisture regain is packed in a vacuum bag and stored at a temperature of -20 to 5°C and a humidity of 30 to 50%.

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