A wet wipe for human use and its preparation method

Abstract

This invention relates to the field of hygiene products, providing a wet wipe for human use and its preparation method. It addresses the problems of existing wet wipes containing preservatives or bactericides to prevent microbial contamination, which leads to irritation and safety issues, and also results in a low pH, making them unsuitable for prolonged skin contact. The wet wipe comprises a substrate, a wet wipe solution, and a packaging bag. The wet wipe solution is obtained in an electrolyzed water generator, which includes a power supply, electrodes, wires, an electrolytic cell, an ion exchange membrane, an anode electrode, a cathode electrode, and an electrolyte. The ion exchange membrane divides the electrolytic cell into an anode chamber and a cathode chamber. Acidic oxidative electrolyzed water is prepared in the anode chamber, and alkaline reducing electrolyzed water is prepared in the cathode chamber. The electrolyte is a 0.1-0.5 wt% NaCl solution. The cathode electrode is a Cu-Zn alloy, and the pH of the wet wipe is 4.0-7.0.

Description

Technical Field

[0001] This invention relates to the field of hygiene products, and more particularly to a wet wipe for human use and its preparation method. Background Technology

[0002] With the development of the times, wet wipes have become widely used in daily life, and there are many types, such as baby wipes for skin cleaning, antibacterial and bactericidal sanitary wipes, kitchen wipes for kitchen cleaning, toilet wipes for feminine hygiene, as well as cooling wipes, makeup remover wipes, mosquito repellent wipes, and so on. Wet wipes are made from a water-repellent base material, which is folded, liquid-added, and packaged. The base material is generally made of spunlace nonwoven fabric, such as viscose cloth, viscose polyester cloth, pure cotton cloth, or wood pulp composite cloth. The liquid added generally consists of deionized water, preservatives, skin care agents, and cleaning agents. On the one hand, the preservatives and bactericides usually added to regular wet wipes can cause skin damage with long-term use, especially irritating to the skin of infants and young children. On the other hand, when using wet wipes, after wiping an infant's fingers, they inevitably suck their fingers, which can easily cause the liquid from the wipes to indirectly enter the infant's mouth, posing a safety concern.

[0003] Chinese Patent Application No. 202310524052.8 discloses a disinfectant wipe with enhanced sterilization effect and its preparation method, comprising a disinfectant solution and a modified spunlace nonwoven fabric as a carrier for the disinfectant solution; the modified spunlace nonwoven fabric is produced by adding 0.02%–0.04% of a cationic neutralizer and 0.02%–0.04% of an organosilicon combing agent to both the pre-wetting water and the spunlace water. This invention enhances the sterilization effect through improvements to the nonwoven fabric and the addition of nonionic surfactants, fluorosilicone defoamers, and alcohols, allowing the sterilization effect to be maintained for a long time and effectively reducing residue after wiping. However, this wipe contains a large number of additives, posing irritation and safety concerns.

[0004] Chinese Patent Application No. 201710376095.0 discloses a method for preparing acidic electrolyzed water disinfectant wipes. The method involves directly soaking pre-prepared non-woven fabric in acidic electrolyzed water with the following physicochemical properties: pH 2.0–3.0, available chlorine 25–70 mg / L, and oxidation-reduction potential ≥1100 mV. The fabric is then packaged using a wipe-making machine to produce the acidic electrolyzed water disinfectant wipes. No preservatives, fragrances, or other chemical bactericides are added to the disinfectant wipes. The wipes are available in single-use and multi-use packaging and fully comply with national hygiene product standards. These wipes have a long shelf life, good disinfection and sterilization effects, are non-irritating, non-polluting, and non-allergenic. They can be directly used for disinfection of hands, skin, and mucous membranes, and can also be used for wiping and disinfecting the surfaces of various utensils and objects. However, the pH of these wipes is relatively low, making them unsuitable for prolonged contact with human skin. Summary of the Invention

[0005] Therefore, in view of the above problems, the present invention provides a wet wipe for human use and a method for preparing the same, which solves the problems of existing wet wipes for human use that add preservatives or bactericides to prevent the product from being contaminated by microorganisms, resulting in irritation and safety issues, and that the pH is too low, making them unsuitable for prolonged contact with human skin.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A personal wet wipe includes a substrate, a wet wipe solution, and a packaging bag. The wet wipe solution is obtained in an electrolytic water generator, which includes a power supply, electrodes, wires, an electrolytic cell, an ion exchange membrane, an anode electrode, a cathode electrode, and an electrolyte. The ion exchange membrane divides the electrolytic cell into an anode chamber and a cathode chamber. Acidic oxidative electrolytic water is prepared in the anode chamber, and alkaline reducing electrolytic water is prepared in the cathode chamber. The electrolyte is a 0.1-0.5 wt% NaCl solution. The cathode electrode is a Cu-Zn alloy. The water vapor permeability of the packaging bag is ≤20 g·m³. -2 ·d -1 Oxygen permeability ≥150cm 3 ·m -2 ·d -1 (0.1MPa) -1 The pH of the human body wipes is 4.0-7.0.

[0008] The acidic oxidative electrolyzed water contains a large amount of active chlorine, which is the main bactericidal active substance (hypochlorous acid HClO). The specific main bactericidal mechanism is as follows: the pH of the strongly acidic electrolyzed water is 2.3 to 2.7, while the survival pH range of most microorganisms is 4 to 9. The strongly acidic pH environment will activate the outer membrane of microbial cells, leading to increased permeability and allowing HClO to enter the microbial cells, thereby destroying the enzymes inside the cells and causing them to die.

[0009] Furthermore, the fabrication process of the anode electrode is as follows:

[0010] I. Pretreatment of the substrate: Take titanium foil, cut it and polish it with sandpaper, wash it with deionized water, then wash it with alcohol and acid in sequence, then soak it in oxalic acid solution with a concentration of 1-10wt% for 45-60 minutes, wash it with deionized water 3-5 times, and dry it for later use.

[0011] II. Preparation of RuO2 electrode: RuCl3 solution is coated onto the substrate surface obtained in step I, dried under an infrared lamp, cooled to room temperature, and then transferred to a high-temperature resistance furnace for calcination. After calcination, it is taken out and cooled naturally. Then the steps of coating, drying, cooling, calcination, and cooling are repeated 10-15 times. Finally, it is transferred to a muffle furnace for calcination. After calcination, it is taken out and cooled to obtain the RuO2 electrode.

[0012] III. Preparation of the anode electrode: The RuO2 electrode obtained in step II is transferred to a vacuum sample stage and sputtered using a high-vacuum magnetron sputtering system. The sputtering target can be any one of Cu, Sn, Zn, or Mo. First, the vacuum chamber is evacuated to a pressure of 3-5 × 10⁻⁵. -4 Pa, introduce protective gas to adjust the vacuum chamber pressure to 1.0 Pa, then connect the sputtering target to DC power supply, sputtering time is 5-10 min, and obtain the anode electrode.

[0013] Furthermore, the packaging bag is made of a single-layer PE film with a thickness of 30-75 μm.

[0014] Furthermore, the packaging bag is made of a single-layer BOPP film with a thickness of 10-75 μm.

[0015] Furthermore, the packaging bag is made of a double-layer composite film with a thickness of 50-90μm. The outer layer of the double-layer composite film is a BOPP film, and the inner layer is a CPP film or an LDPE film.

[0016] Wherein, the PE film is a polyethylene film, the BOPP film is a biaxially oriented polypropylene film, the CPP film is an unstretched polypropylene film, and the LDPE film is a low-density polyethylene film.

[0017] Furthermore, the alcohol washing is ultrasonic treatment in anhydrous ethanol for 10-15 minutes, and the acid washing is ultrasonic treatment in H2SO4 with a concentration of 10-20% for 10-15 minutes.

[0018] Furthermore, the roasting and calcining temperatures are both 400-500℃, the roasting time is 5-10 min, and the calcining time is 60-90 min.

[0019] A method for preparing wet wipes for human use includes the following steps:

[0020] S1. Folding: The substrate is folded using a folding machine, and the folded substrate is conveyed to the liquid filling station by a conveying traction roller.

[0021] S2. Adding liquid: At the liquid adding station, the acidic oxidizing electrolyzed water is evenly sprayed onto the surface of the base fabric. The spraying time is adjusted to control the mass ratio of the acidic oxidizing electrolyzed water to the base fabric to be 1.7-2:1.

[0022] S3, Roll coating: The base fabric treated in step S2 is conveyed to the coating roller for roller coating to form a wet cloth. The coating roller is connected to a storage tank, which contains alkaline reducing electrolyzed water. During roller coating, the mass ratio of alkaline reducing electrolyzed water to base fabric is controlled to be 0.3-2:1.

[0023] S4. Cutting: Cut the wet wipes obtained in step S3 into pre-set sizes;

[0024] S5. Packaging: The cut wet wipes are placed into a packaging bag and sealed to obtain wet wipes for human use.

[0025] Furthermore, the pH of the human body wipes is 4.0-7.0.

[0026] Furthermore, the wet wipes for human use are single-use wet wipe products.

[0027] By adopting the aforementioned technical solution, the beneficial effects of the present invention are as follows:

[0028] 1. Using RuO2 electrode, which has good chemical stability, high specific capacitance and excellent conductivity, as the substrate, a metal target is modified onto the substrate surface by magnetron sputtering to prepare an anode electrode with good chlorine evolution activity, thereby enhancing the sterilization efficiency of acidic oxidative water electrolysis.

[0029] 2. Conventional wet wipes products contain preservatives or bactericides to ensure they are not contaminated by microorganisms within their shelf life. In contrast, this application utilizes the bactericidal and disinfecting properties of acidic oxidative electrolyzed water to kill microorganisms that may be introduced during production or from the substrate. Acidic oxidative electrolyzed water is a known disinfectant with a pH of 2.3-2.7, which is too low for prolonged skin contact and does not meet the pH requirements for human wet wipes in GB / T 27728-2011 (pH 3.5-8.5). Therefore, this application adds a roller coating step, applying alkaline reducing electrolyzed water onto the substrate sprayed with acidic oxidative electrolyzed water. The alkaline reducing electrolyzed water neutralizes the acidic oxidative electrolyzed water, producing a liquid with a pH of 4.0-7.0 after the neutralization reaction. This liquid contains no preservatives or additives and is non-irritating to human skin. Furthermore, the wet wipes are packaged individually for immediate use, eliminating the possibility of secondary contamination.

[0030] 3. Both acidic oxidative electrolyzed water and alkaline reducing electrolyzed water are obtained from the water electrolyzer. Acidic oxidative electrolyzed water prepared in the anode chamber is used first, followed by alkaline reducing electrolyzed water prepared in the cathode chamber. The technical solution of this application has the advantages of low cost, rational utilization of water resources, and green and pollution-free operation.

[0031] 4. The packaging bag uses a single-layer film (such as a single-layer PE film or a single-layer BOPP film) or a double-layer composite film (such as an outer BOPP film and an inner CPP film or LDPE film), which can ensure that the water vapor permeability of the packaging bag is ≤20g·m³. -2 ·d -1 Oxygen permeability ≥150cm 3 ·m -2 ·d -1 (0.1MPa) -1 On the one hand, it can remove excess oxygen from acidic oxidative electrolysis water, and on the other hand, it can prevent the wipes from losing moisture. Attached Figure Description

[0032] Figure 1 This is a schematic diagram illustrating the generation principle of acidic oxidative electrolyzed water and alkaline reducing electrolyzed water in the water electrolyzer of Embodiment 1 of the present invention;

[0033] The numbers in the diagram are as follows: 1-Electrolyzed water generator, 2-Power supply, 3-Electrode, 4-Wire, 5-Electrolytic cell, 6-Ion exchange membrane, 7-Anode electrode, 8-Cathode electrode, 9-Electrolyte, 10-Anode chamber, 11-Cathode chamber. Detailed Implementation

[0034] Example 1

[0035] refer to Figure 1 A type of wet wipe for human use includes a substrate, a wet wipe solution, and a packaging bag. The wet wipe solution is obtained in an electrolyzed water generator 1, which includes a power supply 2, an electrode 3, a wire 4, an electrolyzed cell 5, an ion exchange membrane 6, an anode electrode 7, a cathode electrode 8, and an electrolyte 9. The ion exchange membrane 6 divides the electrolyzed cell 5 into an anode chamber 10 and a cathode chamber 11. Acidic oxidative electrolyzed water is prepared in the anode chamber 10, and alkaline reducing electrolyzed water is prepared in the cathode chamber 11. The electrolyte 9 is a 0.1 wt% NaCl solution. The cathode electrode 8 is a Cu-Zn alloy. The packaging bag is made of a single-layer PE film with a thickness of 30 μm.

[0036] A 0.1 wt% NaCl solution was injected into water electrolysis generator 1, and a voltage was applied. The anions in the NaCl solution, such as Cl-... - OH - The ions pass through ion exchange membrane 6 and are transferred to anode chamber 10, where they release electrons to generate O2, Cl2, HCl, and HClO. Cations such as H+... + Na + The electrons are transferred to the cathode chamber 11, where they are converted into H2 and NaOH. The reactions occurring in the anode chamber 10 are shown in equations (1), (2), and (3); the reactions occurring in the cathode chamber 11 are shown in equations (4) and (5).

[0037] Anode chamber:

[0038] 2Cl - →Cl2↑+2e - (1)

[0039] 2H₂O→4H + +O2↑+4e - (2)

[0040] Cl2 + H2O → HCl + HClO (3)

[0041] Cathode chamber:

[0042] 2H2O+2e - →H₂↑+2OH⁻ - (4)

[0043] 4H + +4e - →2H2↑ (5)

[0044] The preparation process of the anode electrode is as follows:

[0045] I. Pretreatment of the substrate: After cutting the titanium foil and polishing it with sandpaper, wash it with deionized water, and then perform alcohol washing and acid washing in sequence. The alcohol washing is ultrasonic treatment in anhydrous ethanol for 10 min, and the acid washing is ultrasonic treatment in 10% H2SO4 for 10 min. Then, immerse it in 1wt% oxalic acid solution for 45 min, wash it with deionized water 3 times, and dry it for later use.

[0046] II. Preparation of RuO2 electrode: RuCl3 solution was coated onto the substrate surface obtained in step I, dried under an infrared lamp, cooled to room temperature, and then transferred to a high-temperature resistance furnace for calcination. The calcination temperature was 400℃ and the calcination time was 5 min. After calcination, the electrode was removed and allowed to cool naturally. The steps of coating, drying, cooling, calcination, and cooling were repeated 10 times. Finally, the electrode was transferred to a muffle furnace for calcination. The calcination temperature was 400℃ and the calcination time was 60 min. After calcination, the electrode was removed and cooled to obtain the RuO2 electrode.

[0047] III. Preparation of the anode electrode: The RuO2 electrode obtained in step II is transferred to a vacuum sample stage and sputtered using a high-vacuum magnetron sputtering system. The sputtering target is a Cu target. First, the vacuum chamber is evacuated to a pressure of 3 × 10⁻⁶. - 4 Pa, introduce protective gas to adjust the vacuum chamber pressure to 1.0 Pa, then connect the sputtering target to DC power supply, sputtering time is 5 min, and obtain the anode electrode.

[0048] The above-described method for preparing a wet wipe for human use includes the following steps:

[0049] S1. Folding: The substrate is folded using a folding machine, and the folded substrate is conveyed to the liquid filling station by a conveying traction roller.

[0050] S2. Adding liquid: At the liquid adding station, the acidic oxidizing electrolyzed water is evenly sprayed onto the surface of the base fabric. The spraying time is adjusted to control the mass ratio of the acidic oxidizing electrolyzed water to the base fabric to be 1.7:1.

[0051] S3, Roller Coating: The base fabric treated in step S2 is conveyed to the coating roller for roller coating to form a wet cloth. The coating roller is connected to a storage tank, which contains alkaline reducing electrolyzed water. During roller coating, the mass ratio of alkaline reducing electrolyzed water to base fabric is controlled to be 0.3:1.

[0052] S4. Cutting: Cut the wet wipes obtained in step S3 into pre-set sizes;

[0053] S5. Packaging: The cut wet wipes are packed into a packaging bag and sealed to obtain a human wet wipe with a pH of 4.2. The human wet wipe is a single-sheet wet wipe product.

[0054] Example 2

[0055] A type of wet wipe for human use includes a substrate, a wet wipe solution, and a packaging bag. The wet wipe solution is obtained in an electrolytic water generator, which includes a power supply, electrodes, wires, an electrolytic cell, an ion exchange membrane, an anode electrode, a cathode electrode, and an electrolyte. The ion exchange membrane divides the electrolytic cell into an anode chamber and a cathode chamber. Acidic oxidative electrolytic water is prepared in the anode chamber, and alkaline reducing electrolytic water is prepared in the cathode chamber. The electrolyte is a 0.3 wt% NaCl solution. The cathode electrode is a Cu-Zn alloy. The packaging bag is made of a single-layer BOPP membrane with a thickness of 10 μm.

[0056] The preparation process of the anode electrode is as follows:

[0057] I. Pretreatment of the substrate: After cutting the titanium foil and polishing it with sandpaper, wash it with deionized water, and then perform alcohol washing and acid washing in sequence. The alcohol washing is ultrasonic treatment in anhydrous ethanol for 12 minutes, and the acid washing is ultrasonic treatment in 15% H2SO4 for 12 minutes. Then, immerse it in 5wt% oxalic acid solution for 50 minutes, wash it with deionized water 3 times, and dry it for later use.

[0058] II. Preparation of RuO2 electrode: RuCl3 solution was coated onto the substrate surface obtained in step I, dried under an infrared lamp, cooled to room temperature, and then transferred to a high-temperature resistance furnace for calcination. The calcination temperature was 450℃ and the calcination time was 8 min. After calcination, the electrode was removed and allowed to cool naturally. The steps of coating, drying, cooling, calcination, and cooling were repeated 12 times. Finally, the electrode was transferred to a muffle furnace for calcination. The calcination temperature was 450℃ and the calcination time was 70 min. After calcination, the electrode was removed and cooled to obtain the RuO2 electrode.

[0059] III. Preparation of the anode electrode: The RuO2 electrode obtained in step II is transferred to a vacuum sample stage and sputtered using a high-vacuum magnetron sputtering system. The sputtering target is a Sn target. First, the vacuum chamber is evacuated to a pressure of 4 × 10⁻⁶. - 4 Pa, introduce protective gas to adjust the vacuum chamber pressure to 1.0 Pa, then connect the sputtering target to DC power supply, sputtering time is 8 min, and obtain the anode electrode.

[0060] The above-described method for preparing a wet wipe for human use includes the following steps:

[0061] S1. Folding: The substrate is folded using a folding machine, and the folded substrate is conveyed to the liquid filling station by a conveying traction roller.

[0062] S2. Adding liquid: At the liquid adding station, the acidic oxidizing electrolyzed water is evenly sprayed onto the surface of the base fabric. The spraying time is adjusted to control the mass ratio of the acidic oxidizing electrolyzed water to the base fabric to be 1.8:1.

[0063] S3, Roll coating: The base fabric treated in step S2 is conveyed to the coating roller for roller coating to form a wet cloth. The coating roller is connected to a storage tank, which contains alkaline reducing electrolyzed water. During roller coating, the mass ratio of alkaline reducing electrolyzed water to base fabric is controlled to be 0.9:1.

[0064] S4. Cutting: Cut the wet wipes obtained in step S3 into pre-set sizes;

[0065] S5. Packaging: The cut wet wipes are packed into a packaging bag and sealed to obtain a human wet wipe with a pH of 4.8. The human wet wipe is a single-sheet wet wipe product.

[0066] Example 3

[0067] A personal wet wipe includes a substrate, a wet wipe solution, and a packaging bag. The wet wipe solution is obtained in an electrolyzed water generator, which includes a power supply, electrodes, wires, an electrolyzer, an ion exchange membrane, an anode electrode, a cathode electrode, and an electrolyte. The ion exchange membrane divides the electrolyzer into an anode chamber and a cathode chamber. Acidic oxidative electrolyzed water is prepared in the anode chamber, and alkaline reducing electrolyzed water is prepared in the cathode chamber. The electrolyte is a 0.5 wt% NaCl solution. The cathode electrode is a Cu-Zn alloy. The packaging bag is made of a double-layer composite membrane with a thickness of 50 μm. The outer layer of the double-layer composite membrane is a BOPP membrane, and the inner layer is a CPP membrane.

[0068] The preparation process of the anode electrode is as follows:

[0069] I. Pretreatment of the substrate: After cutting the titanium foil and polishing it with sandpaper, wash it with deionized water, and then perform alcohol washing and acid washing in sequence. The alcohol washing is ultrasonic treatment in anhydrous ethanol for 15 min, and the acid washing is ultrasonic treatment in 20% H2SO4 for 15 min. Then, immerse it in 10wt% oxalic acid solution for 60 min, wash it with deionized water 5 times, and dry it for later use.

[0070] II. Preparation of RuO2 electrode: RuCl3 solution was coated onto the substrate surface obtained in step I, dried under an infrared lamp, cooled to room temperature, and then transferred to a high-temperature resistance furnace for calcination at 500°C for 10 minutes. After calcination, the electrode was removed and allowed to cool naturally. The steps of coating, drying, cooling, calcination, and cooling were repeated 15 times. Finally, the electrode was transferred to a muffle furnace for calcination at 500°C for 90 minutes. After calcination, the electrode was removed and cooled to obtain the RuO2 electrode.

[0071] III. Preparation of the anode electrode: The RuO2 electrode obtained in step II is transferred to a vacuum sample stage and sputtered using a high-vacuum magnetron sputtering system. The sputtering target is a Zn target. First, the vacuum chamber is evacuated to a pressure of 5 × 10⁻⁶. - 4 Pa, introduce protective gas to adjust the vacuum chamber pressure to 1.0 Pa, then connect the sputtering target to DC power supply, sputtering time is 10 min, and obtain the anode electrode.

[0072] The above-described method for preparing a wet wipe for human use includes the following steps:

[0073] S1. Folding: The substrate is folded using a folding machine, and the folded substrate is conveyed to the liquid filling station by a conveying traction roller.

[0074] S2. Adding liquid: At the liquid adding station, the acidic oxidizing electrolyzed water is evenly sprayed onto the surface of the base fabric. The spraying time is adjusted to control the mass ratio of the acidic oxidizing electrolyzed water to the base fabric to be 1.9:1.

[0075] S3, Roll coating: The base fabric treated in step S2 is conveyed to the coating roller for roller coating to form a wet cloth. The coating roller is connected to a storage tank, which contains alkaline reducing electrolyzed water. During roller coating, the mass ratio of alkaline reducing electrolyzed water to base fabric is controlled to be 1.8:1.

[0076] S4. Cutting: Cut the wet wipes obtained in step S3 into pre-set sizes;

[0077] S5. Packaging: The cut wet wipes are packed into a packaging bag and sealed to obtain a human wet wipe with a pH of 6.5. The human wet wipe is a single-sheet wet wipe product.

[0078] Example 4

[0079] A personal wet wipe includes a substrate, a wet wipe solution, and a packaging bag. The wet wipe solution is obtained in an electrolyzed water generator, which includes a power supply, electrodes, wires, an electrolyzer, an ion exchange membrane, an anode electrode, a cathode electrode, and an electrolyte. The ion exchange membrane divides the electrolyzer into an anode chamber and a cathode chamber. Acidic oxidative electrolyzed water is prepared in the anode chamber, and alkaline reducing electrolyzed water is prepared in the cathode chamber. The electrolyte is a 0.5 wt% NaCl solution. The cathode electrode is a Cu-Zn alloy. The packaging bag is made of a double-layer composite membrane with a thickness of 90 μm. The outer layer of the double-layer composite membrane is a BOPP membrane, and the inner layer is an LDPE membrane.

[0080] The preparation process of the anode electrode is as follows:

[0081] I. Pretreatment of the substrate: After cutting the titanium foil and polishing it with sandpaper, wash it with deionized water, and then perform alcohol washing and acid washing in sequence. The alcohol washing is ultrasonic treatment in anhydrous ethanol for 15 min, and the acid washing is ultrasonic treatment in 20% H2SO4 for 15 min. Then, immerse it in 10wt% oxalic acid solution for 60 min, wash it three times with deionized water, and dry it for later use.

[0082] II. Preparation of RuO2 electrode: RuCl3 solution was coated onto the substrate surface obtained in step I, dried under an infrared lamp, cooled to room temperature, and then transferred to a high-temperature resistance furnace for calcination at 500°C for 10 minutes. After calcination, the electrode was removed and allowed to cool naturally. The steps of coating, drying, cooling, calcination, and cooling were repeated 15 times. Finally, the electrode was transferred to a muffle furnace for calcination at 500°C for 90 minutes. After calcination, the electrode was removed and cooled to obtain the RuO2 electrode.

[0083] III. Preparation of the anode electrode: The RuO2 electrode obtained in step II is transferred to a vacuum sample stage and sputtered using a high-vacuum magnetron sputtering system. The sputtering target is a Mo target. First, the vacuum chamber is evacuated to a pressure of 5 × 10⁻⁶. - 4 Pa, introduce protective gas to adjust the vacuum chamber pressure to 1.0 Pa, then connect the sputtering target to DC power supply, sputtering time is 10 min, and obtain the anode electrode.

[0084] The above-described method for preparing a wet wipe for human use includes the following steps:

[0085] S1. Folding: The substrate is folded using a folding machine, and the folded substrate is conveyed to the liquid filling station by a conveying traction roller.

[0086] S2. Adding liquid: At the liquid adding station, the acidic oxidizing electrolyzed water is evenly sprayed onto the surface of the base fabric. The spraying time is adjusted to control the mass ratio of the acidic oxidizing electrolyzed water to the base fabric to be 2:1.

[0087] S3, Roll coating: The base fabric treated in step S2 is conveyed to the coating roller for roller coating to form a wet cloth. The coating roller is connected to a storage tank, which contains alkaline reducing electrolyzed water. During roller coating, the mass ratio of alkaline reducing electrolyzed water to base fabric is controlled to be 2:1.

[0088] S4. Cutting: Cut the wet wipes obtained in step S3 into pre-set sizes;

[0089] S5. Packaging: The cut wet wipes are packed into a packaging bag and sealed to obtain a human wet wipe with a pH of 7.0. The human wet wipe is a single-sheet wet wipe product.

[0090] Comparative Example 1

[0091] The difference from Example 1 is that no roller coating step is performed, and the packaging bag is made of a single-layer PET film. All other technical aspects are the same as in Example 1.

[0092] The test data for the products of Example 1, Example 2, Example 3, Example 4 and Comparative Example 1 are shown in Table 1.

[0093] Table 1

[0094]

[0095] The oxygen permeability test is conducted according to the "Gas Permeability Test Method for Plastic Films and Sheets - Differential Pressure Method" (GB / T1038—2000), and the water vapor permeability test is conducted according to the "Water Vapor Permeability Test Method for Plastic Films and Sheets - Cup Method" (GB / T 1037—1988).

[0096] Table 1 shows that the wet wipes prepared using the technical solution of this application have pH values ​​of 4.2, 4.6, 6.5, and 7.0, respectively, which are within the pH range of 4.0-7.0, conforming to the national standard "Wet Wipes" (GB / T 27728-2011) for human wet wipes, which specifies a pH range of 3.5-8.5. The wet wipes in Comparative Example 1 have a pH of 2.8, which is too low and unsuitable for prolonged contact with human skin, and also does not meet the pH requirements for human wet wipes in GB / T 27728-2011. The water vapor transmission rate of the packaging bags for Examples 1, 2, 3, and 4 in Table 1 is ≤20 g·m³. -2 ·d -1 Oxygen permeability ≥150cm 3 ·m -2 ·d -1 (0.1MPa) -1 It can effectively prevent the evaporation of the medicine in the wet wipes, while ensuring that excess oxygen and other gases in the product can pass through the packaging film.

[0097] Although the invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which shall be within the scope of protection of the invention.

Claims

1. A human body wet wipe characterized by: The wet wipe includes a substrate, a wet wipe liquid and a packaging bag; the wet wipe liquid is obtained in an electrolytic water generator, the electrolytic water generator includes a power supply, an electrode, a wire, an electrolytic cell, an ion exchange membrane, an anode electrode, a cathode electrode and an electrolyte; the ion exchange membrane divides the electrolytic cell into an anode chamber and a cathode chamber, acidic oxidizing electrolytic water is prepared in the anode chamber, alkaline reducing electrolytic water is prepared in the cathode chamber, the electrolyte is a NaCl solution with a concentration of 0.1-0.5wt%, the cathode electrode is a Cu-Zn alloy, the water vapor transmission rate of the packaging bag is ≤20 g·m -2 ·d -1 , the oxygen transmission rate is ≥150 cm 3 ·m -2 ·d -1 ·(0.1MPa) -1 ; the pH of the human body wet wipe is 4.0-7.0; The preparation process of the anode electrode is as follows: Pre-treatment of the substrate: cut the titanium foil and polish it with sandpaper, then wash it with deionized water, and then sequentially perform alcohol washing and acid washing, and then immerse it in an oxalic acid solution with a concentration of 1-10 wt% for 45-60 min, wash it with deionized water for 3-5 times, and dry it for standby use; Preparation of the RuO2 electrode: coat the RuCl3 solution to the surface of the substrate obtained in step I, dry it under an infrared lamp, cool it to room temperature, transfer it to a high-temperature resistance furnace for calcination, take it out after calcination, and then repeat the steps of coating, drying, cooling, calcination, and cooling for 10-15 times, and finally transfer it to a muffle furnace for calcination, take it out after calcination, and cool it to obtain the RuO2 electrode. Preparation of anode electrode: the RuO2 electrode obtained in step II was transferred to a vacuum sample stage, and sputtering treatment was performed using a high-vacuum magnetron sputtering instrument, and the sputtering target was any one of a Cu target, a Sn target, a Zn target or a Mo target, the vacuum chamber was first evacuated to a pressure of 3-5x10 -4 Pa, a protective gas was introduced, the pressure of the vacuum chamber was adjusted to 1.0 Pa, then the sputtering target was connected to a direct current power supply, and the sputtering time was 5-10 min to obtain an anode electrode; The packaging bag is made of a single-layer PE film, a single-layer BOPP film or a double-layer composite film; the thickness of the single-layer PE film is 30-75 The alcohol washing is ultrasonic treatment in anhydrous ethanol for 10-15 min, and the acid washing is ultrasonic treatment in H2SO4 with a concentration of 10-20% for 10-15 min. m; the thickness of the single-layer BOPP film is 10-75 m; the thickness of the double-layer composite film is 50-90 m, the outer layer of the double-layer composite film is a BOPP film, and the inner layer of the double-layer composite film is a CPP film or an LDPE film.

2. The human body wet wipe of claim 1 wherein: The calcination and calcination temperatures are both 400-500 DEG C, the calcination time is 5-10 min, and the calcination time is 60-90 min.

3. The wet wipes for human use according to claim 1, characterized in that: The method comprises the following steps:

4. The method of making a human body wipe according to claim 1, wherein, S1, folding: fold the substrate using a folding machine, and convey the folded substrate to a liquid adding station by a conveying traction roller; S2, liquid adding: in the liquid adding station, uniformly spray the acidic oxidized electrolyzed water to the surface of the substrate, adjust the spraying time, and control the mass ratio of the acidic oxidized electrolyzed water and the substrate to be 1.7-2:1; S3, roller coating: convey the substrate treated in step S2 to a liquid coating roller to perform roller coating to form a wet wipe, the liquid coating roller is connected to a liquid storage barrel, the liquid storage barrel contains alkaline reduced electrolyzed water, and the mass ratio of the alkaline reduced electrolyzed water and the substrate is controlled to be 0.3-2:1 during roller coating; S4, slitting: according to the set size, the wet wipe obtained in step S3 is slitted; S5, packaging: the slitted wet wipe is put into a packaging bag, and after sealing, a human body wet wipe is obtained. The human body wet wipe is a single-piece wet wipe product.

5. The method of claim 4, wherein: ​

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