Softening antistatic decontamination washing sheet and preparation method thereof

Abstract

The invention relates to a smooth antistatic decontamination washing sheet and a preparation method thereof. A softening antistatic decontamination washing sheet comprises a film-forming agent, an anionic surfactant, a nonionic surfactant, a softener, a conditioner, a filler, a chelating agent, essence and water, has softening, antistatic and decontamination characteristics, has small corrosion to equipment and is suitable for large-scale mass production.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of washing products, more particularly, it relates to a softening, antistatic and stain-removing washing tablet and a preparation method thereof. BACKGROUND

[0002] During the multiple washing of fabrics, the inherent smoothness, extensibility and elasticity of the fibers are often damaged to a certain extent due to the alkaline components in the detergent and the cleaning effect, resulting in the fabric appearing wrinkled in appearance, hard in touch, and easily generating static electricity in dry weather. In order to solve these problems, softeners are widely used in fabric care.

[0003] Quaternary ammonium salt type cationic surfactants and silicone type softeners are common fabric softeners, but silicone softeners such as polydimethylsiloxane are not easily degradable in the natural environment, which may have adverse effects on the ecosystem. Modified silicone softeners such as amino silicone oil are easily decomposed at high temperatures, which not only affects the use effect, but also may exacerbate environmental pollution. And in order to obtain better softening effect, it is often necessary to add excessive softener in the washing product, and the excessive residual softener may cause irritation or allergic reaction to human skin.

[0004] Patent CN114517413A discloses a fully dissolved softening tablet, which solves the problem of less loading of non-woven fabric type softening tablet, but it does not have stain-removing function.

[0005] Based on the above, there are also some washing products on the market that take into account softening and stain removal, such as the softening laundry liquid and laundry composition disclosed in patents CN108624417A and CN117363432A. Although they achieve the purpose of softening and stain removal, the use of a large amount of strong cationic surfactant as a softener results in a rough surface of the fabric after washing. At the same time, during the production process, the strong cationic surfactant may damage the oxide film on the surface of the production equipment, affecting the corrosion resistance of the equipment.

[0006] Therefore, it is necessary to develop a washing product that has both softening and stain-removing functions, is environmentally friendly and healthy, and is convenient to use. SUMMARY

[0007] In order to solve the above problems, the present application provides a softening, antistatic and stain-removing washing tablet and a preparation method thereof. The softening, antistatic and stain-removing washing tablet provided by the present application has the characteristics of softening, antistatic and stain-removing, has little corrosion to the equipment and is suitable for large-scale production.

[0008] In a first aspect, the present application provides a softening, antistatic and stain-removing washing tablet, which adopts the following technical solution: A softening antistatic decontamination washing tablet, the raw materials for preparing the softening antistatic decontamination washing tablet include the following components in percentage by weight: 6-35% film forming agent, 5-20% anionic surfactant, 1-10% nonionic surfactant, 1-15% softening agent, 0-10% conditioning agent, 3-20% filler, 0.2-5% chelating agent, 0.5-2% essence, water; The film forming agent is polyvinyl alcohol or a combination of polyvinyl alcohol and polyvinyl pyrrolidone; The anionic surfactant includes at least one of sodium alkyl isethionate, sodium olethethoxysulfate, and sodium fatty alcohol polyoxyethylene ether sulfate; The nonionic surfactant includes at least two of fatty amine polyglyceryl ether, olethethoxylate, fatty acid glyceride, sucrose fatty acid ester, methyl glucose trioleate, glycerol laurate, and fatty acid methyl ester ethoxylate; the softening agent includes at least one of sodium methyl lauroyl taurate, sodium methyl cocoyl taurate, sodium lauroyl methylcysteinate, sodium cocoyl methylcysteinate, sodium lauroyl alaninate, sodium cocoyl alaninate, sodium lauroyl glycinate, and sodium cocoyl glycinate.

[0009] In a complex mixture of anionic and cationic surfactants, due to the strong electrostatic attraction between positive and negative ions, rod-shaped micelles are easily formed after mutual compounding. When the concentration exceeds the critical micelle concentration, aggregation occurs, resulting in turbidity, phase separation, and other phenomena, thereby adversely affecting the performance of the washing tablet. The present application selects specific types of anionic surfactants, nonionic surfactants, and softening agents to cooperate and form a special system to avoid the above problems.

[0010] The selected softening agent is a weak cationic surfactant. Sodium alkyl isethionate, sodium olethethoxysulfate, and sodium fatty alcohol polyoxyethylene ether sulfate contain hydrophilic groups such as ethoxyl groups, which can interact with the hydrophilic part of the cationic surfactant molecules to form a stable mixture in water, avoiding precipitation in the solution. The cationic surfactant has excellent compatibility and synergistic washing effect, thereby simultaneously achieving efficient softening and decontamination.

[0011] The nonionic surfactant selected in the present application is different from the polyoxyethylene ether type nonionic surfactant in structure mainly based on ether bonds. The hydrophilic group of fatty amine polyglyceryl ether is composed of hydroxyl groups and ether bonds, and the hydroxyl groups are connected to the ether bonds. The hydrophilicity of the hydroxyl groups is significantly stronger than that of the polyoxyethylene ether type surfactant, and the fabric has certain softness and antistatic properties.

[0012] Moreover, the selected softening agent has good emulsifying, wetting, solubilizing, dispersing, and foaming properties, and is stable to acid, heat, and alkali. It can maintain its performance under different environmental conditions, is mild and low-irritating, and is green and environmentally friendly.

[0013] Preferably, the preparation raw material of the softening, antistatic and stain-removing detergent tablet comprises the following components by weight percentage: 12.5-20% film-forming agent, 15-20% anionic surfactant, 4-7% nonionic surfactant, 5-10% softening agent, 1-3% conditioning agent, 3-10% filler, 1.5-3% chelating agent, 0.5-2% fragrance, and water.

[0014] Preferably, the film-forming agent is a mixture of polyvinyl alcohol and polyvinylpyrrolidone, and the mass ratio of polyvinyl alcohol to polyvinylpyrrolidone is 3-25:1.

[0015] Preferably, the film-forming agent is a mixture of polyvinyl alcohol and polyvinylpyrrolidone, and the mass ratio of polyvinyl alcohol to polyvinylpyrrolidone is 3-15:1.

[0016] By using the above technical solution, a specific film-forming agent is selected and applied in a special system composed of a specific type of anionic surfactant, nonionic surfactant and softening agent, so that the detergent tablet has good tablet quality, enhanced moisture resistance and high temperature resistance, and can fully exert the softening, antistatic and stain-removing effects of the detergent tablet.

[0017] Preferably, the anionic surfactant is sodium alkyl isethionate, the nonionic surfactant is a mixture of fatty amine polyglyceryl ether and fatty acid methyl ester ethoxylate, and the softening agent is sodium methyl lauroyl taurate.

[0018] Preferably, in the preparation raw material of the softening, antistatic and stain-removing detergent tablet, the weight percentage of sodium alkyl isethionate is 12-18%, the weight percentage of fatty amine polyglyceryl ether is 3-8%, the weight percentage of fatty acid methyl ester ethoxylate is 1-3%, and the weight percentage of sodium methyl lauroyl taurate is 5-8%.

[0019] By using the above technical solution, the types of anionic surfactant, nonionic surfactant and softening agent are further limited, so that the special system achieves a better synergistic state and fully exerts the softening, antistatic and stain-removing effects of the detergent tablet.

[0020] Preferably, the conditioning agent comprises at least one of alkyl dimethyl polyoxyethylene ammonium chloride, monoalkyl dimethyl hydroxyethyl ammonium chloride, and chlorinated-2-hydroxy-3-(trimethylamino) propyl polyethylene oxide cellulose ether.

[0021] Preferably, the filler is plant starch.

[0022] Preferably, the plant starch comprises at least one of corn starch, pea starch and cassava starch.

[0023] Preferably, the chelating agent includes at least one of sodium polyaspartate, citric acid and its salts, gluconic acid and its salts.

[0024] In a second aspect, the application provides a preparation method of a soft anti-static decontamination washing sheet, which adopts the following technical scheme: A preparation method of a soft anti-static decontamination washing sheet, comprising the following steps: Step 1: dispersing the chelating agent with water to obtain a chelating agent dispersion liquid; and dispersing the filler with water to obtain a filler dispersion liquid; Step 2: mixing the film-forming agent with water at 80-90°C until the material is fully swelled and dissolved; Step 3: adding the anionic surfactant to the material of Step 2 until it is completely dissolved without lumps, and then adding the non-ionic surfactant and fully dissolving it; Step 4: mixing the filler dispersion liquid with the material of Step 3; Step 5: mixing the chelating agent dispersion liquid with the material of Step 4; Step 6: adding the softening agent to the material of Step 5 until it is completely dissolved without lumps, and continuously stirring; Step 7: cooling the material of Step 6 to 45-55°C, adding the remaining raw materials, and stirring uniformly to obtain a slurry; Step 8: drying the slurry of Step 7 at 80-120°C, shaping and forming a sheet to obtain a soft anti-static decontamination washing sheet.

[0025] By adopting the above technical scheme, various raw materials are mixed in a specific order at corresponding temperatures, so that the various raw materials can react more fully and better play the performance of the washing sheet.

[0026] In summary, the application has the following beneficial effects: 1. The application adopts a specific anionic surfactant, non-ionic surfactant and softening agent to form a new special system, which avoids the problem of a complex mixed system of anionic and cationic surfactants, effectively forms a sheet, and the active ingredients are not decomposed at high temperatures during the sheet forming process, ensuring efficient decontamination and softening effects, and adding anti-static effect.

[0027] 2. The special system of the application does not use strong cationic surfactants, avoids damaging the dense oxide film on the surface of the production equipment, does not affect the corrosion resistance of the production equipment, and prolongs the service life of the equipment.

[0028] 3. The special system of the application replaces the traditional technical scheme of selecting quaternary ammonium salt type cationic surfactants and organic silicon softening agents, which is more beneficial to the ecological system and protects the environment, and is less likely to cause irritation or allergic reactions to human skin. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 Figure 1 is a state diagram of the washing tablet of Example 1, Comparative Example 4, Comparative Example 5, Comparative Example 7 after the high-temperature resistance test for 24 h.

[0030] Figure 2 Figure 2 is a diagram of the corrosion of the tablet-making equipment metal surface by the washing tablet of Comparative Example 1. DETAILED DESCRIPTION

[0031] The application will be further described in detail below with reference to the accompanying drawings and examples.

[0032] The raw materials used in the following examples and comparative examples are all commercially available products. EXAMPLE

[0033] Example 1 A soft and antistatic stain-removing washing tablet is prepared from the following components in the following weight percentages: Polyvinyl alcohol 15%, polyvinylpyrrolidone 5%, corn starch 10%, sodium lauryl hydroxyethyl sulfonate 16%, fatty acid methyl ester ethoxylate 5%, fatty amine polyglyceryl ether 2%, sodium methyl lauroyl taurate 6%, chloro-2-hydroxy-3-(trimethylammonium) propyl polyethylene oxide cellulose ether 1.2%, alkyl dimethyl polyethylene oxide ammonium chloride 0.5%, citric acid 0.3%, sodium citrate 1.5%, fragrance 0.5%, and deionized water in the balance.

[0034] The alkyl dimethyl polyethylene oxide ammonium chloride is commercially available from Guangzhou Yingkexike Chemical Technology Co., Ltd. and is of type HEX25.

[0035] The fatty amine polyglyceryl ether is prepared as follows: A dry flask is charged with fatty amine solid (tetradecylamine, commercially available from Wuhan Huaxiangke Biological Technology Co., Ltd., 96%), which is melted to a liquid state at 100°C, and then glycidol (commercially available from Guangdong Yuangong Chemical Co., Ltd.) is added dropwise at a rate of 1 mL / min while stirring. The molar ratio of tetradecylamine to glycidol is 1:6. After 12 h of reaction at the constant temperature, a solid base catalyst is slowly added (the molar ratio of tetradecylamine to solid base is 10:1), and then the reaction temperature is adjusted to 120°C. After 2 h of reaction, the reaction mixture is cooled to room temperature to obtain the fatty amine polyglyceryl ether.

[0036] The solid base catalyst can be potassium carbonate or sodium carbonate. In this example, potassium carbonate is used.

[0037] The example also provides a method for preparing a soft and antistatic stain-removing washing tablet, which comprises the following steps: Step 1: The filler is mixed with deionized water in an equal mass ratio to obtain a filler dispersion liquid, which is ready for use.

[0038] The chelating agent is mixed with deionized water at a mass ratio of 1:3 to obtain a chelating agent dispersion, which is ready for use.

[0039] Step 2: The film-forming agent is mixed with deionized water (mass ratio of film-forming agent to deionized water is 1:8), heated to 85°C, and stirred at constant temperature for 45 minutes until the material swells and fully dissolves.

[0040] Step 3: The anionic surfactant is added to the material of Step 2 under stirring, and after complete dissolution without lumps, the nonionic surfactant is added and fully dissolved.

[0041] Step 4: The filler dispersion is added to the material of Step 3 under stirring.

[0042] Step 5: The chelating agent dispersion is added to the material of Step 4 under stirring.

[0043] Step 6: The softener is added to the material of Step 5 under stirring, and after complete dissolution without lumps, the stirring is continued.

[0044] Step 7: The temperature is cooled to 50°C, and the conditioning agent, fragrance, and the remaining water are added to the material of Step 6 and stirred uniformly to obtain a slurry.

[0045] Step 8: The slurry is dried at 100°C, shaped into tablets, sliced into different sizes, and packaged to obtain the finished product.

[0046] Example 2 A softening and antistatic decontamination washing tablet, which is different from Example 1 in that the components and amounts of raw materials are different, specifically including: polyvinyl alcohol 10%, polyvinylpyrrolidone 2.5%, pea starch 8%, fatty ethoxysulfonic acid sodium 18%, sodium lauroyl methyl amino acid 5%, methyl glucose trioleate 4%, fatty amine polyglyceryl ether 1%, chloro-2-hydroxy-3-(trimethylammonium) propyl polyethylene oxide cellulose ether 1.2%, gluconic acid 0.3%, sodium gluconate 2%, fragrance 0.5%, and deionized water in the remaining amount.

[0047] Fatty ethoxysulfonic acid sodium is purchased from China Institute of Daily-use Chemicals, model number SNS-80.

[0048] A method for preparing a softening and antistatic decontamination washing tablet, which is different from Example 1 in that, In Step 2, the film-forming agent is mixed with deionized water (mass ratio of film-forming agent to deionized water is 1:5), heated to 80°C, and stirred at constant temperature for 45 minutes until the material swells and fully dissolves.

[0049] In Step 7, the temperature is cooled to 45°C.

[0050] In Step 8, the slurry is dried at 80°C.

[0051] Example 3 A soft anti-static decontamination washing tablet, which is different from example 1 in that the components and amounts of raw materials are different, specifically including: polyvinyl alcohol 15%, polyvinylpyrrolidone 5%, cassava starch 10%, sodium cocoyl isethionate 16%, glyceryl laurate 3%, sodium methyl cocoyl taurate 3%, sodium lauroyl arginate 3%, fatty amine polyglyceryl ether 1%, chlorinated-2-hydroxy-3-(trimethylamino) propyl polyethylene oxide cellulose ether 1.2%, citric acid 0.3%, sodium polyaspartate 2.5%, essence 0.5%, deionized water balance.

[0052] A method for preparing a soft anti-static decontamination washing tablet, which is different from example 1 in that, In step 2, the film-forming agent is mixed with deionized water (the mass ratio of film-forming agent to deionized water is 1:10), heated to 90°C, and stirred at constant temperature for 45 minutes until the material is fully swollen and dissolved.

[0053] In step 7, the temperature is cooled to 55°C.

[0054] In step 8, the slurry is dried at 120°C.

[0055] Example 4 A soft anti-static decontamination washing tablet, which is different from example 1 in that the components and amounts of raw materials are different, specifically including: polyvinyl alcohol 15%, polyvinylpyrrolidone 1%, corn starch 3%, sodium oleth sulfate 9%, sodium cocoyl isethionate 9%, fatty acid methyl ester ethoxylate 2%, sucrose fatty acid ester 1%, sodium lauroyl glycinate 10%, fatty amine polyglyceryl ether 1%, chlorinated-2-hydroxy-3-(trimethylamino) propyl polyethylene oxide cellulose ether 1.2%, monoalkyl dimethyl hydroxyethyl ammonium chloride 0.5%, citric acid 0.3%, sodium gluconate 2%, essence 0.5%, deionized water balance.

[0056] Example 5 A soft anti-static decontamination washing tablet, which is different from example 1 in that the addition amount of chlorinated-2-hydroxy-3-(trimethylamino) propyl polyethylene oxide cellulose ether and alkyl dimethyl polyoxyethylene chloride is 0; the amount of deionized water is supplemented to the original amount.

[0057] Example 6 A soft anti-static decontamination washing tablet, which is different from example 5 in that the addition amount of sodium methyl lauroyl taurate is 10%, and the amount of deionized water is adjusted accordingly to make the total addition amount 100%.

[0058] Example 7 A softening antistatic soil release detergent sheet, which is different from Example 1 in that the raw materials are prepared as follows: polyvinyl alcohol 15%, corn starch 5%, sodium lauryl isethionate 16%, fatty acid methyl ester ethoxylate 5%, fatty amine polyglyceryl ether 1%, sodium methyl lauroyl taurate 6%, chloro-2-hydroxy-3-(trimethylammonio)propyl polyethylene oxide cellulose ether 1.2%, alkyl dimethyl polyethylene oxide ammonium chloride 0.5%, citric acid 0.3%, sodium citrate 1.5%, essence 0.5%, and deionized water to make up the balance.

[0059] Table 1 Comparative Example Comparative Example 1 A softening antistatic soil release detergent sheet, which is different from Example 1 in that sodium methyl lauroyl taurate is replaced with an equivalent amount of bis fatty alkyl ethyl ester ammonium methyl sulfate.

[0060] Comparative Example 2 A softening antistatic soil release detergent sheet, which is different from Example 1 in that sodium methyl lauroyl taurate is replaced with an equivalent amount of amino polydimethylsiloxane.

[0061] Comparative Example 3 A softening antistatic soil release detergent sheet, which is different from Example 1 in that sodium methyl lauroyl taurate is replaced with an equivalent amount of polyvinyl alcohol.

[0062] Comparative Example 4 A softening antistatic soil release detergent sheet, which is different from Example 1 in that fatty acid methyl ester ethoxylate is replaced with an equivalent amount of fatty alcohol polyoxyethylene ether.

[0063] Comparative Example 5 A softening antistatic soil release detergent sheet, which is different from Example 1 in that fatty acid methyl ester ethoxylate is replaced with an equivalent amount of alkyl glycoside.

[0064] Comparative Example 6 A softening antistatic soil release detergent sheet, which is different from Example 1 in that sodium lauryl isethionate is replaced with an equivalent amount of sodium dodecyl sulfate.

[0065] Comparative Example 7 A softening antistatic decontamination washing tablet, different from example 1, in which the raw materials are prepared as follows: polyvinyl alcohol 20% (film-forming agent), sodium a-olefin sulfonate 15% (anionic surfactant), sodium dodecyl sulfate 29% (anionic surfactant), fatty alcohol polyoxyethylene ether 5% (nonionic surfactant), alkyl glycoside 4% (nonionic surfactant), cocamidopropyl betaine 10% (amphoteric surfactant), alkyl bis-hydroxyethyl methyl ammonium chloride 10% (softener), sodium citrate 0.1% (chelating agent), essence 1%, deionized water balance.

[0066] A method for preparing a softening antistatic decontamination washing tablet, comprising the following steps: Step 1: Mix the chelating agent with deionized water at a mass ratio of 1:3 to obtain a chelating agent dispersion, ready for use.

[0067] Step 2: Mix the film-forming agent with deionized water (mass ratio of film-forming agent to deionized water is 1:8), heat to 85°C, and stir constantly for 45 minutes until the material is fully swollen and dissolved.

[0068] Step 3: Add the anionic surfactant to the material in step 2 under stirring, and after complete dissolution without lumps, add the nonionic surfactant and amphoteric surfactant, and fully dissolve.

[0069] Step 4: Add the chelating agent dispersion to the material in step 3 under stirring.

[0070] Step 5: Add the softener to the material in step 4 under stirring, and after complete dissolution without lumps, continue stirring.

[0071] Step 6: Cool to 50°C, and add the essence and the balance of water to the material in step 6, continue stirring until uniform, to obtain a slurry.

[0072] Step 7: Dry the slurry at 100°C, shape into tablets, cut into different sizes, and pack into boxes to obtain the finished product.

[0073] Comparative Example 8 A softening antistatic decontamination washing tablet, different from example 1, in which the raw materials are prepared as follows: polyvinyl alcohol 16% (film-forming agent), sodium dodecyl sulfate 18% (anionic surfactant), fatty alcohol polyoxyethylene ether 8% (nonionic surfactant), bis-fatty alkyl ethyl ester hydroxyethyl methyl ammonium sulfate 5% (softener), amino polydimethylsiloxane 5% (softener), corn starch 10% (filler), zeolite 8% (filler), bentonite 18% (filler), sodium citrate 2%, essence 0.2%, and the rest is deionized water.

[0074] Comparative Example 9 A softening antistatic decontamination washing tablet, which differs from Example 1 in that the raw materials are prepared as follows: polyvinylpyrrolidone 6% (film forming agent), sodium lauryl hydroxyethyl sulfonate 5% (anionic surfactant), sodium lauroyl amino acid 6% (softening agent), fatty acid methyl ester ethoxylate 2% (nonionic surfactant), corn starch 15%, amino polydimethylsiloxane 1% (softening agent), citric acid 0.3%, sodium citrate 1.5%, fragrance 0.5%, and deionized water in the remainder.

[0075] Comparative Example 10 A softening antistatic decontamination washing tablet, which differs from Comparative Example 7 in that sodium lauroyl amino acid is used instead of alkyl bis-hydroxyethyl methyl ammonium chloride in equal amount.

[0076] Comparative Example 11 A softening antistatic decontamination washing tablet, which differs from Comparative Example 8 in that sodium lauroyl amino acid is used instead of bis-fatty alkyl ethyl ester hydroxyethyl methyl sulfate ammonium and amino polydimethylsiloxane in equal amount.

[0077] Performance detection test 1. Viscosity test: According to GB / T 5561-2012 “Method for rotational viscosity and flow performance of surfactants”, the slurry viscosity is determined at 60±0.5℃, 4# needle, 6 rotations. The results are recorded in Table 2.

[0078] Table 2 The washing tablets of Examples 1-7 adopt a specific combination system, which is less affected by amino acid surfactants (softening agents).

[0079] Comparative Example 1 and Comparative Example 2 are washing tablets prepared by replacing the softening agent of Example 1 with a commonly used softening agent in equal amount. According to the results in Table 1, the specific combination system of the present application can also tolerate strong cationic softening agents, but strong cationic softening agents will increase the viscosity of the slurry. Comparative Example 3 is a slurry without any softening agent component, and the difference in slurry viscosity compared with Example 1 is not large, indicating that the specific combination system of the present application is compatible with amino acid surfactants (softening agents). The addition of amino acid surfactants in the other combination systems of Comparative Example 10 and Comparative Example 11 will reduce the viscosity of the slurry, and the viscosity is too low to dry and make tablets. By replacing the corresponding components in Example 1 with other anionic and nonionic surfactants in equal amount to obtain Comparative Examples 4-6, it can be found that Comparative Examples 4-5 have high viscosity and can successfully make tablets, but the quality of the washing tablets is poor, the tablets are brittle, and debris and fragments are easily produced during the slicing process.

[0080] 2. Moisture stability test: According to QB / T5779-2023 "Laundry Tablets", a box of washing tablets (with washing tablets stacked up and down inside) is placed in a test environment with a temperature of (25±2) °C and a relative humidity of (85±5) %, repeated for 4 groups. After 24h, one group is taken out, then two washing tablets are separated, and whether there is adhesion between the tablets is observed. The results are recorded in Table 3.

[0081] 3. High temperature resistance test: The washing tablets are placed in a test environment with a temperature of (55±2) °C for 24h, and the washing tablets are bent and folded. Whether the washing tablets have cracks is observed. The results are recorded in Table 3.

[0082] The state of the washing tablets of Example 1, Comparative Example 4, Comparative Example 5 and Comparative Example 7 after 24h high temperature resistance test is shown in Figure 1 .

[0083] Table 3 Although Comparative Examples 1 and 2 can be tableted, according to the test results in Table 3, the washing tablets prepared by Comparative Examples 1 and 2 have poor moisture resistance, poor high temperature resistance and poor tableting quality.

[0084] 4. Fabric conditioning and antistatic test: The test is carried out according to GB / T16801-2013 "Determination of antistatic property of fabric conditioner". The test concentration of the washing tablets to be tested is 2.5g / L, and the surface specific resistance logarithmic value difference Δlgps≥2.5 is qualified. The polyester cloth is purchased from the National Daily Chemical Industry Research Institute. The results are recorded in Table 4.

[0085] Table 4 5. Surface roughness test: The surface roughness of the washed polyester cloth is tested by a surface roughness tester, and a 10μm diameter pointer suitable for soft materials is selected. Four samples of each sample are selected for testing. The results are recorded in Table 5.

[0086] 6. Subjective evaluation of fabric hand feeling: According to FZ / T 01171-2023 "Textile Fabric Touch Detection and Evaluation Method Three-point Beam Method" Appendix A, the surface roughness of the washed fabric is evaluated on a scale of 100 points, ≤59 points for very rough, 60-69 points for rough, 70-80 points for slightly smooth, 81-90 points for smooth, and 91-100 points for very smooth, with unwashed polyester cloth as a control. The results are recorded in Table 5.

[0087] Table 5 7. Stain removal test: According to GB / T 13174-2021 "Detergency and cyclic washing performance of laundry detergents", the water used for washing is 250 mg / kg CaCl2hard water, and the test cloth is national standard carbon black JB-01 stained cloth, national standard protein JB-02 stained cloth, and national standard sebum JB-03 stained cloth. The detersive power is determined.

[0088] The 0.2% standard laundry liquid is used as a control to obtain the stain removal ratio Pi, wherein when Pi≥1.0 is qualified, and Pi<1.0 is unqualified. The results are recorded in Table 6.

[0089] Table 6 Group Concentration JB-01 JB-02 JB-03 Determination result Example 1 0.2％ 1.05 1.19 1.12 Pass Example 2 0.2％ 1.07 1.17 1.10 Pass Example 3 0.2％ 1.09 1.29 1.00 Pass Example 4 0.2％ 1.00 1.44 1.35 Pass Example 5 0.2％ 1.11 1.35 1.09 Pass Example 6 0.2％ 1.08 1.29 1.27 Pass Example 7 0.2％ 1.07 1.18 1.15 Pass Comparative Example 1 0.2％ 0.89 1.02 1.00 Fail Comparative Example 2 0.2％ 0.90 1.21 1.07 Fail Comparative Example 3 0.2％ 1.08 1.16 1.14 Pass Comparative Example 4 0.2％ 0.93 1.18 1.03 Fail Comparative Example 5 0.2％ 0.96 1.07 1.02 Fail Comparative Example 6 0.2％ 0.93 1.12 0.90 Fail Comparative Example 7 0.2％ 0.90 0.98 0.97 Fail Comparative Example 8 0.2％ 0.91 1.11 1.07 Fail Example 1 has little change in stain removal performance compared with Comparative Example 3, indicating that the amino acid surfactant-based softener does not have the phenomenon of mutual exclusion of softening and stain removal performance. Although Comparative Example 1 can form a sheet, its stain removal performance is poorer than that of Comparative Example 3, indicating that part of the strong cationic softener and anionic surfactant are electrostatically adsorbed, reducing the stain removal ability.

[0090] Comparative Examples 4 and 5 are obtained by replacing the nonionic surfactant of Example 1, and Comparative Example 6 is obtained by replacing the anionic surfactant. According to the above test results, the destruction of the special construction system has a greater impact on the stain removal and antistatic performance of the washing sheet.

[0091] The corrosion of the washing sheet of Comparative Example 1 on the metal surface of the sheet forming equipment is shown in Figure 2 .

[0092] The specific embodiments are merely an explanation of the present application, and are not a limitation of the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the present specification, and the modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A soft antistatic decontamination washing sheet, characterized in that: The raw materials for preparing the soft antistatic decontamination detergent sheet include the following components in weight percentage: 6-35% film-forming agent, 5-20% anionic surfactant, 1-10% nonionic surfactant, 1-15% softener, 0-10% conditioner, 3-20% filler, 0.2-5% chelating agent, 0.5-2% fragrance, and water; The film-forming agent is polyvinyl alcohol or a combination of polyvinyl alcohol and polyvinyl pyrrolidone; The anionic surfactant includes at least one of sodium alkyl isethionate, sodium oil ethoxy sulfonate, and sodium fatty alcohol polyoxyethylene ether sulfate; The nonionic surfactant includes at least two of fatty amine polyglycerol ether, oil ethoxylate, fatty acid glyceride, sucrose fatty acid ester, methyl glucose trioleate, glyceryl laurate, and fatty acid methyl ester ethoxylate; The softener includes at least one of sodium methyl lauroyl taurate, sodium methyl cocoyl taurate, sodium lauroyl sarcosinate, sodium cocoyl sarcosinate, sodium lauroyl alanine, sodium cocoyl alanine, sodium lauroyl glycinate, and sodium cocoyl glycinate.

2. The soft antistatic decontamination cleaning sheet according to claim 1, characterized in that: The raw materials for preparing the soft antistatic decontamination detergent sheet include the following components in percentage by weight: 12.5-20% film former, 15-20% anionic surfactant, 4-7% nonionic surfactant, 5-10% softener, 1-3% conditioner, 3-10% filler, 1.5-3% chelating agent, 0.5-2% essence and water.

3. The soft antistatic decontamination cleaning sheet according to claim 1, characterized in that: The film-forming agent is a mixture of polyvinyl alcohol and polyvinyl pyrrolidone, and the mass ratio of polyvinyl alcohol to polyvinyl pyrrolidone is 3-25:

1.

4. The soft antistatic decontamination cleaning sheet according to claim 1, characterized in that: The anionic surfactant is sodium alkylhydroxyethyl sulfonate, the nonionic surfactant is a mixture of fatty amine polyglycerol ether and fatty acid methyl ester ethoxylate, and the softener is sodium methyl lauroyl taurate.

5. The soft antistatic decontamination cleaning sheet according to claim 4, characterized in that: The raw materials for preparing the soft antistatic decontamination detergent sheet include 12-18% by weight of sodium alkylhydroxyethyl sulfonate, 3-8% by weight of fatty amine polyglycerol ether, 1-3% by weight of fatty acid methyl ester ethoxylate, and 5-8% by weight of sodium methyl lauroyl taurate.

6. The soft antistatic decontamination cleaning sheet according to claim 1, characterized in that: The conditioning agent includes at least one of alkyl dimethyl polyoxyethylene ammonium chloride, monoalkyl dimethyl hydroxyethyl ammonium chloride, and 2-hydroxy-3-(trimethylamino)propyl polyethylene oxide cellulose ether chloride.

7. The soft antistatic decontamination cleaning sheet according to claim 1, characterized in that: The filler is plant starch.

8. The soft antistatic decontamination cleaning sheet according to claim 7, characterized in that: The plant starch includes at least one of corn starch, pea starch and tapioca starch.

9. The soft antistatic decontamination cleaning sheet according to claim 1, characterized in that: The chelating agent includes at least one of sodium polyaspartate, citric acid and its salts, and gluconic acid and its salts.

10. A method for preparing the soft antistatic decontamination detergent sheet according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: dispersing a chelating agent with water to obtain a chelating agent dispersion; dispersing a filler with water to obtain a filler dispersion; Step 2: Mix the film-forming agent with water at 80-90°C until the material swells and dissolves completely; Step 3: Add anionic surfactant to the material in step 2 and wait until it is completely dissolved until there are no lumps. Then add nonionic surfactant and dissolve it fully. Step 4: mixing the filler dispersion with the material from step 3; Step 5: mixing the chelating agent dispersion with the material of step 4; Step 6: Add softener to the material in step 5 and continue stirring until it is completely dissolved and no lumps remain. Step 7: After the material in step 6 is cooled to 45-55°C, the remaining raw materials are added and stirred to obtain a slurry; Step 8: Dry the slurry from step 7 at 80-120° C., and shape it into tablets to obtain soft antistatic decontamination detergent tablets.

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