Wet tissue for human body and preparation method thereof

Abstract

The invention relates to the field of hygienic products, provides a wet tissue for a human body and a preparation method thereof, and solves the problems that an existing wet tissue for the human body is added with a preservative or a bactericide to prevent the product from being polluted by microorganisms, has the problems of irritation and safety, is relatively low in pH and is not suitable for long-time contact with the skin of the human body. The wet tissue for the human body comprises a base material, wet tissue liquid medicine and a packaging bag. The wet tissue liquid medicine is obtained in an electrolyzed water generator, and the electrolyzed water generator comprises a power supply, an electrode, a wire, an electrolytic bath, an ion exchange membrane, an anode electrode, a cathode electrode and electrolyte. The electrolytic bath is divided into an anode chamber and a cathode chamber by the ion exchange membrane, acidic oxidation electrolyzed water is prepared in the anode chamber, alkaline reduction electrolyzed water is prepared in the cathode chamber, the electrolyte is a NaCl solution with the concentration of 0.1-0.5 wt%, the cathode electrode is a Cu-Zn alloy, and the pH value of the wet tissue for the human body is 4.0-7.0.

Description

Technical Field

[0001] The invention relates to the field of sanitary products, in particular to a wet wipe for human body and a preparation method thereof. Background Art

[0002] With the development of the times, wet wipes have been widely used in daily life, and there are many types, such as baby wipes for skin cleaning, sanitary wipes for antibacterial and sterilization, kitchen wipes for kitchen cleaning, wet toilet wipes for private cleaning, as well as cooling wipes, makeup removal wipes, mosquito repellent wipes, etc. The composition of wet wipes is to select a water-wettable substrate, which is made by folding, adding liquid, and packaging. Among them, the substrate generally uses a spunlace non-woven fabric, such as viscose cloth, viscose polyester cloth, pure cotton cloth, and wood pulp composite cloth. The liquid added is generally composed of deionized water, preservatives, skin care agents, detergents, etc. On the one hand, the preservatives and bactericides usually added to conventional wet wipes will cause damage to the skin after long-term use, especially for infants and young children. There is a greater irritation to the skin. On the other hand, when wet wipes are used in daily life, after wiping the fingers of infants and young children, they will inevitably suck their fingers, which can easily cause the wet wipes liquid to indirectly enter the mouth of infants and young children, and there are safety issues.

[0003] Chinese patent application No. 202310524052.8 discloses a disinfectant wet wipe with enhanced bactericidal effect and a preparation method thereof, including a disinfectant and a modified spunlace nonwoven fabric as a carrier of the disinfectant; the modified spunlace nonwoven fabric is produced by adding 0.02% to 0.04% of a cationic neutralizer and 0.02% to 0.04% of a silicone combing agent to both the pre-wetting water and the spunlace water. The invention enhances the bactericidal effect by improving the non-woven fabric, adding non-ionic surfactants, fluorosilicone defoamers and alcohol substances, so that the bactericidal effect can be maintained for a long time, and the residual marks after wiping can be effectively reduced. However, the wet wipes contain more additives, and there are irritation and safety issues.

[0004] Chinese patent application No. 201710376095.0 discloses a method for preparing acidic oxidation potential water disinfection wet wipes, wherein the acidic oxidation potential water with the physical and chemical indicators of pH 2.0-3.0, effective chlorine 25-70 mg / L, and redox potential ≥ 1100 mV is directly soaked in a pre-prepared non-woven fabric, and then packaged on a wet wipe machine to produce acidic oxidation potential water disinfection wet wipes. No preservatives, flavors, or other chemical bactericides are added to the disinfection wet wipes. The disinfection wet wipes are available in single-piece and multi-piece packages, and are fully in compliance with the requirements when tested according to the national standards for sanitary products. The wet wipes have a long storage time, good disinfection and sterilization effects, are non-irritating, non-polluting, and non-allergic. They can be directly used for disinfection and sterilization of hands, skin, and mucous membranes, and can also be used for wiping and disinfecting the surfaces of various utensils and other objects. However, the pH of the wet wipes is low, which is not suitable for long-term 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 body and a preparation method thereof, so as to solve the problems that the existing wet wipes for human body add preservatives or bactericides to prevent the product from being contaminated by microorganisms, have irritation and safety issues, and have a low pH value and are not suitable for long-term contact with human skin.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A wet wipe for human body, comprising 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 comprising: 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 oxidizing electrolytic water is prepared in the anode chamber, and 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, and the water vapor permeability of the packaging bag is ≤20g·m -2 ·d -1 , oxygen permeability ≥150cm 3 ·m -2 ·d -1 (0.1MPa) -1 ; The pH of the human body wet wipes is 4.0-7.0.

[0008] The large amount of active chlorine contained in the acidic oxidizing electrolyzed water is the main bactericidal active substance (hypochlorous acid HClO). The specific main bactericidal mechanism is: the pH of the strongly acidic electrolyzed water is 2.3-2.7, and the survival pH range of most microorganisms is 4-9. The strongly acidic pH environment will activate the outer membrane of the microbial cells, resulting in increased permeability and HClO entering the microbial cells, destroying the enzymes inside the cells and causing death.

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

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

[0011] II. RuO 2 Electrode preparation: RuCl 3The solution is coated on the surface of the substrate obtained in step I, dried under an infrared lamp, cooled to room temperature, transferred to a high-temperature resistance furnace for calcination, taken out and naturally cooled after calcination, and then the steps of coating, drying, cooling, calcination, and cooling are repeated 10-15 times, and finally transferred to a muffle furnace for calcination. After calcination, it is taken out and cooled to obtain RuO 2 electrode;

[0012] III. Preparation of anode electrode: The RuO obtained in step II 2 The electrode was transferred to the vacuum sample stage and sputtered using a high vacuum magnetron sputtering instrument. The sputtering target was any one of Cu target, Sn target, Zn target or Mo target. The vacuum chamber was first evacuated to a pressure of 3-5×10 -4 Pa, introduce protective gas, adjust the vacuum chamber pressure to 1.0 Pa, and then connect the sputtering target to a DC power supply. The sputtering time is 5-10 minutes to obtain an anode electrode.

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

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

[0015] Furthermore, the packaging bag is made of a double-layer composite film, the thickness of the double-layer composite film is 50-90 μm, 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 a LDPE film.

[0016] Among them, the PE film is a polyethylene film, the BOPP film is a biaxially oriented polypropylene film, the CPP film is an unoriented 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 min, and the acid washing is 10-20% H 2 SO 4 Ultrasonic treatment for 10-15 min.

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

[0019] A method for preparing wet wipes for human body comprises the following steps:

[0020] S1. Folding: Use a folding machine to fold the substrate, and the conveying traction roller conveys the folded substrate to the liquid adding station;

[0021] S2, adding liquid: at the liquid adding station, spray the acidic oxidizing electrolyzed water evenly onto the surface of the base fabric, adjust the spraying time, and control the mass ratio of the acidic oxidizing electrolyzed water to the base fabric to be 1.7-2:1;

[0022] S3, roller coating: conveying the base fabric treated in step S2 to a coating roller for roller coating to form wet wipes, wherein the coating roller is connected to a liquid storage barrel, wherein the liquid storage barrel contains alkaline reduced electrolyzed water, and during roller coating, the mass ratio of the alkaline reduced electrolyzed water to the base fabric is controlled to be 0.3-2:1;

[0023] S4, cutting: cutting the wet wipes obtained by step S3 according to the set size;

[0024] S5, packaging: putting the cut wet wipes into packaging bags, and sealing the bags to obtain wet wipes for human use.

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

[0026] Furthermore, the human body wet wipes are single-piece wet wipes products.

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

[0028] 1. RuO with good chemical stability, high mass specific capacitance and excellent conductivity 2 The electrode is used as a substrate, and the metal target material is modified on the surface of the substrate through magnetron sputtering to prepare an anode electrode with good chlorine evolution activity, thereby enhancing the sterilization efficiency of acidic oxidative electrolysis of water.

[0029] 2. Conventional wet wipes products will add certain preservatives or bactericides to ensure that the products are not contaminated by microorganisms within the shelf life. Compared with conventional wet wipes products, this application first uses the bactericidal and disinfecting properties of acidic oxidized electrolyzed water to kill microorganisms that may be introduced into the production process and the substrate. Acidic oxidized electrolyzed water is already a well-known disinfectant with a pH of 2.3-2.7, which is low and not suitable for long-term contact with human skin. It does not meet the pH requirements of human wet wipes in GB / T 27728-2011 national standard (pH 3.5-8.5); therefore, this application adds a roller coating step to roller-coat alkaline reduced electrolyzed water onto the base fabric sprayed with acidic oxidized electrolyzed water. Alkaline reduced electrolyzed water can neutralize acidic oxidized electrolyzed water, and after the neutralization reaction, a liquid with a pH of 4.0-7.0 is generated, which does not contain any preservatives or additives and is non-irritating to human skin; and the wet wipes product is made into a single-piece package, which is ready to use and has no possibility of secondary pollution.

[0030] 3. Both acidic oxidative electrolyzed water and alkaline reduced electrolyzed water are obtained from an electrolytic water generator. The acidic oxidative electrolyzed water prepared in the anode chamber is used first, and then the alkaline reduced electrolyzed water prepared in the cathode chamber is used. The technical solution of the present application has the advantages of low cost, rational use of water resources, and green and pollution-free.

[0031] 4. The packaging bag is made of a single-layer film (such as a single-layer PE film, a single-layer BOPP film), or a double-layer composite film (such as a BOPP film for the outer layer and a CPP film or LDPE film for the inner layer), which can make the water vapor permeability of the packaging bag ≤20g·m -2 ·d -1 , oxygen permeability ≥150cm 3 ·m -2 ·d -1 (0.1MPa) -1 On the one hand, it can discharge the excess oxygen in the acidic oxidizing electrolyzed water, and on the other hand, it can prevent the moisture loss of the wet wipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the generation principle of acidic oxidized electrolyzed water and alkaline reduced electrolyzed water in the electrolyzed water generator in Example 1 of the present invention;

[0033] Explanation of the numbers in the figure: 1-electrolyzed water generator, 2-power supply, 3-electrode, 4-conducting wire, 5-electrolyzer, 6-ion exchange membrane, 7-anode electrode, 8-cathode electrode, 9-electrolyte, 10-anode chamber, 11-cathode chamber. DETAILED DESCRIPTION

[0034] Example 1

[0035] refer to Figure 1 , a wet wipe for human body, comprising a substrate, a wet wipe liquid and a packaging bag; the wet wipe liquid is obtained in an electrolytic water generator 1, and the electrolytic water generator 1 comprises: a power supply 2, an electrode 3, a wire 4, an electrolytic 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 electrolytic cell 5 into an anode chamber 10 and a cathode chamber 11, acidic oxidation electrolytic water is prepared in the anode chamber 10, and alkaline reduction electrolytic water is prepared in the cathode chamber 11, the electrolyte 9 is a NaCl solution with a concentration of 0.1wt%, the cathode electrode 8 is a Cu-Zn alloy, and the packaging bag is made of a single-layer PE film, and the thickness of the single-layer PE film is 30μm;

[0036] A 0.1 wt% NaCl solution is injected into the electrolytic water generator 1, and a voltage is applied. The anions in the NaCl solution, such as Cl - OH - The electrons are transferred through the ion exchange membrane 6 to the anode chamber 10, where they release electrons to generate O2 , Cl 2 , HCl and HClO. Cations such as H + 、Na + Transfer to cathode chamber 11, obtain electrons to generate H 2 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 - →Cl 2 ↑+2e - (1)

[0039] 2H 2 O→4H + +O 2 ↑+4e - (2)

[0040] Cl 2 +H 2 O→HCl+HCLO (3)

[0041] Cathode chamber:

[0042] 2H 2 O+2e - →H 2 ↑+2OH - (4)

[0043] 4H + +4e - →2H 2 ↑ (5)

[0044] Wherein, the preparation process of the anode electrode is:

[0045] I. Pretreatment of the substrate: Cut the titanium foil and polish it with sandpaper, then 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 minutes, and the acid washing is 10% H 2 SO 4 The samples were subjected to ultrasonic treatment for 10 min, then immersed in a 1 wt% oxalic acid solution for 45 min, washed with deionized water for 3 times, and dried for later use;

[0046] II. RuO 2 Electrode preparation: RuCl 3The solution was coated on the surface of the substrate obtained in step I, dried under an infrared lamp, cooled to room temperature, and transferred to a high-temperature resistance furnace for calcination. The calcination temperature was 400° C. and the calcination time was 5 min. After the calcination was completed, the substrate was taken out and cooled naturally. Then, the steps of coating, drying, cooling, calcining, and cooling were repeated 10 times. Finally, the substrate was transferred to a muffle furnace for calcination. The calcination temperature was 400° C. and the calcination time was 60 min. After the calcination was completed, the substrate was taken out and cooled to obtain RuO 2 electrode;

[0047] III. Preparation of anode electrode: The RuO obtained in step II 2 The electrode was transferred to the vacuum sample stage and sputtered using a high vacuum magnetron sputtering instrument. The sputtering target was a Cu target. The vacuum chamber was first evacuated to a pressure of 3×10 - 4 Pa, introduce protective gas, adjust the vacuum chamber pressure to 1.0 Pa, and then connect the sputtering target to a DC power supply. The sputtering time is 5 min to obtain an anode electrode.

[0048] The method for preparing the above-mentioned wet wipes for human body comprises the following steps:

[0049] S1. Folding: Use a folding machine to fold the substrate, and the conveying traction roller conveys the folded substrate to the liquid adding station;

[0050] S2, adding liquid: at the liquid adding station, spray the acidic oxidizing electrolyzed water evenly onto the surface of the base fabric, adjust the spraying time, and control the mass ratio of the acidic oxidizing electrolyzed water to the base fabric to be 1.7:1;

[0051] S3, roller coating: conveying the base fabric treated in step S2 to a coating roller for roller coating to form wet wipes, wherein the coating roller is connected to a liquid storage barrel, wherein the liquid storage barrel contains alkaline reduced electrolyzed water, and during roller coating, the mass ratio of the alkaline reduced electrolyzed water to the base fabric is controlled to be 0.3:1;

[0052] S4, cutting: cutting the wet wipes obtained by step S3 according to the set size;

[0053] S5. Packaging: Put the cut wet wipes into a packaging bag, and seal it to obtain human wet wipes with a pH of 4.2. The human wet wipes are single-piece wet wipes products.

[0054] Example 2

[0055] A wet wipe for human body, comprising 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 comprising: 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 oxidation electrolytic water is prepared in the anode chamber, and alkaline reduction electrolytic water is prepared in the cathode chamber, the electrolyte is a NaCl solution with a concentration of 0.3wt%, the cathode electrode is a Cu-Zn alloy, and the packaging bag is made of a single-layer BOPP film, and the thickness of the single-layer BOPP film is 10μm;

[0056] Wherein, the preparation process of the anode electrode is:

[0057] I. Pretreatment of the substrate: Cut the titanium foil and polish it with sandpaper, then 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 15% H 2 SO 4 The samples were ultrasonically treated for 12 min, then immersed in a 5 wt% oxalic acid solution for 50 min, washed three times with deionized water, and dried for later use;

[0058] II. RuO 2 Electrode preparation: RuCl 3 The solution was coated on the surface of the substrate obtained in step I, dried under an infrared lamp, cooled to room temperature, and transferred to a high-temperature resistance furnace for calcination. The calcination temperature was 450° C. and the calcination time was 8 min. After the calcination was completed, the substrate was taken out and cooled naturally. Then, the steps of coating, drying, cooling, calcining, and cooling were repeated 12 times. Finally, the substrate was transferred to a muffle furnace for calcination. The calcination temperature was 450° C. and the calcination time was 70 min. After the calcination was completed, the substrate was taken out and cooled to obtain RuO 2 electrode;

[0059] III. Preparation of anode electrode: The RuO obtained in step II 2 The electrode was transferred to the vacuum sample stage and sputtered using a high vacuum magnetron sputtering instrument. The sputtering target was a Sn target. The vacuum chamber was first evacuated to a pressure of 4×10 - 4 Pa, introduce protective gas, adjust the vacuum chamber pressure to 1.0 Pa, and then connect the sputtering target to a DC power supply. The sputtering time is 8 min to obtain an anode electrode.

[0060] The method for preparing the above-mentioned wet wipes for human body comprises the following steps:

[0061] S1. Folding: Use a folding machine to fold the substrate, and the conveying traction roller conveys the folded substrate to the liquid adding station;

[0062] S2, adding liquid: at the liquid adding station, spray the acidic oxidizing electrolyzed water evenly onto the surface of the base fabric, adjust the spraying time, and control the mass ratio of the acidic oxidizing electrolyzed water to the base fabric to be 1.8:1;

[0063] S3, roller coating: conveying the base fabric treated in step S2 to a coating roller for roller coating to form wet wipes, wherein the coating roller is connected to a liquid storage barrel, wherein the liquid storage barrel contains alkaline reduced electrolyzed water, and during roller coating, the mass ratio of the alkaline reduced electrolyzed water to the base fabric is controlled to be 0.9:1;

[0064] S4, cutting: cutting the wet wipes obtained by step S3 according to the set size;

[0065] S5. Packaging: Put the cut wet wipes into a packaging bag, and seal it to obtain human wet wipes with a pH of 4.8. The human wet wipes are single-piece wet wipes products.

[0066] Example 3

[0067] A wet wipe for human body, comprising 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 comprising: 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 oxidation electrolytic water is prepared in the anode chamber, and alkaline reduction electrolytic water is prepared in the cathode chamber, the electrolyte is a NaCl solution with a concentration of 0.5wt%, the cathode electrode is a Cu-Zn alloy, the packaging bag is made of a double-layer composite film, the thickness of the double-layer composite film is 50μm, 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;

[0068] Wherein, the preparation process of the anode electrode is:

[0069] I. Pretreatment of the substrate: Cut the titanium foil and polish it with sandpaper, then 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 minutes, and the acid washing is 20% H 2 SO 4 The samples were subjected to ultrasonic treatment for 15 min, then immersed in a 10 wt% oxalic acid solution for 60 min, washed with deionized water for 5 times, and dried for later use;

[0070] II. RuO 2 Electrode preparation: RuCl 3The solution was coated on the surface of the substrate obtained in step I, dried under an infrared lamp, cooled to room temperature, and transferred to a high-temperature resistance furnace for calcination. The calcination temperature was 500° C. and the calcination time was 10 min. After the calcination was completed, the substrate was taken out and cooled naturally. Then, the steps of coating, drying, cooling, calcining, and cooling were repeated 15 times. Finally, the substrate was transferred to a muffle furnace for calcination. The calcination temperature was 500° C. and the calcination time was 90 min. After the calcination was completed, the substrate was taken out and cooled to obtain RuO 2 electrode;

[0071] III. Preparation of anode electrode: The RuO obtained in step II 2 The electrode was transferred to the vacuum sample stage and sputtered using a high vacuum magnetron sputtering instrument. The sputtering target was a Zn target. The vacuum chamber was first evacuated to a pressure of 5×10 - 4 Pa, introduce protective gas, adjust the vacuum chamber pressure to 1.0 Pa, and then connect the sputtering target to a DC power supply. The sputtering time is 10 min to obtain an anode electrode.

[0072] The method for preparing the above-mentioned wet wipes for human body comprises the following steps:

[0073] S1. Folding: Use a folding machine to fold the substrate, and the conveying traction roller conveys the folded substrate to the liquid adding station;

[0074] S2, adding liquid: at the liquid adding station, spray the acidic oxidizing electrolyzed water evenly onto the surface of the base fabric, adjust the spraying time, and control the mass ratio of the acidic oxidizing electrolyzed water to the base fabric to be 1.9:1;

[0075] S3, roller coating: conveying the base fabric treated in step S2 to a coating roller for roller coating to form wet wipes, wherein the coating roller is connected to a liquid storage barrel, wherein the liquid storage barrel contains alkaline reduced electrolyzed water, and during roller coating, the mass ratio of the alkaline reduced electrolyzed water to the base fabric is controlled to be 1.8:1;

[0076] S4, cutting: cutting the wet wipes obtained by step S3 according to the set size;

[0077] S5. Packaging: Put the cut wet wipes into a packaging bag, and seal it to obtain human wet wipes with a pH of 6.5. The human wet wipes are single-piece wet wipes products.

[0078] Example 4

[0079] A wet wipe for human body, comprising 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 comprising: 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 oxidation electrolytic water is prepared in the anode chamber, and alkaline reduction electrolytic water is prepared in the cathode chamber, the electrolyte is a NaCl solution with a concentration of 0.5wt%, the cathode electrode is a Cu-Zn alloy, the packaging bag is made of a double-layer composite film, the thickness of the double-layer composite film is 90μm, the outer layer of the double-layer composite film is a BOPP film, and the inner layer of the double-layer composite film is an LDPE film;

[0080] Wherein, the preparation process of the anode electrode is:

[0081] I. Pretreatment of the substrate: Cut the titanium foil and polish it with sandpaper, then 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 minutes, and the acid washing is 20% H 2 SO 4 The samples were subjected to ultrasonic treatment for 15 min, then immersed in a 10 wt% oxalic acid solution for 60 min, washed with deionized water for 3 times, and dried for later use;

[0082] II. RuO 2 Electrode preparation: RuCl 3 The solution was coated on the surface of the substrate obtained in step I, dried under an infrared lamp, cooled to room temperature, and transferred to a high-temperature resistance furnace for calcination. The calcination temperature was 500° C. and the calcination time was 10 min. After the calcination was completed, the substrate was taken out and cooled naturally. Then, the steps of coating, drying, cooling, calcining, and cooling were repeated 15 times. Finally, the substrate was transferred to a muffle furnace for calcination. The calcination temperature was 500° C. and the calcination time was 90 min. After the calcination was completed, the substrate was taken out and cooled to obtain RuO 2 electrode;

[0083] III. Preparation of anode electrode: The RuO obtained in step II 2 The electrode was transferred to the vacuum sample stage and sputtered using a high vacuum magnetron sputtering instrument. The sputtering target was a Mo target. The vacuum chamber was first evacuated to a pressure of 5×10 - 4 Pa, introduce protective gas, adjust the vacuum chamber pressure to 1.0 Pa, and then connect the sputtering target to a DC power supply. The sputtering time is 10 min to obtain an anode electrode.

[0084] The method for preparing the above-mentioned wet wipes for human body comprises the following steps:

[0085] S1. Folding: Use a folding machine to fold the substrate, and the conveying traction roller conveys the folded substrate to the liquid adding station;

[0086] S2, adding liquid: at the liquid adding station, spray the acidic oxidizing electrolyzed water evenly onto the surface of the base fabric, adjust the spraying time, and control the mass ratio of the acidic oxidizing electrolyzed water to the base fabric to be 2:1;

[0087] S3, roller coating: conveying the base fabric treated in step S2 to a coating roller for roller coating to form wet wipes, wherein the coating roller is connected to a liquid storage barrel, wherein the liquid storage barrel contains alkaline reduced electrolyzed water, and during roller coating, the mass ratio of the alkaline reduced electrolyzed water to the base fabric is controlled to be 2:1;

[0088] S4, cutting: cutting the wet wipes obtained by step S3 according to the set size;

[0089] S5. Packaging: Put the cut wet wipes into a packaging bag, and seal it to obtain a human wet wipe with a pH of 7.0. The human wet wipe is a single-piece wet wipe product.

[0090] Comparative Example 1

[0091] The difference from Example 1 is that the roller coating step is not performed and the packaging bag is made of a single-layer PET film. Other technical solutions are the same as those of Example 1.

[0092] The test data of 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 test of oxygen permeability is based on "Plastic Film and Sheet Gas Permeability Test Method Pressure Difference Method" (GB / T1038-2000), and the test of water vapor permeability is based on "Plastic Film and Sheet Water Vapor Permeability Test Method Cup Method" (GB / T 1037-1988).

[0096] The data in Table 1 show that the pH values ​​of the wet wipes products of Example 1, Example 2, Example 3, and Example 4 prepared by the technical solution of the present application are 4.2, 4.6, 6.5, and 7.0, respectively, and the pH values ​​are within the range of 4.0-7.0, which is in line with the pH range of 3.5-8.5 for wet wipes for human use in the national standard "Wet Wipes" (GB / T 27728-2011). The pH value of the wet wipes product of Comparative Example 1 is 2.8, which is relatively low and is not suitable for long-term contact with human skin, and does not meet the pH requirements of wet wipes for human use in the national standard GB / T 27728-2011. The water vapor permeability of the packaging bags of Example 1, Example 2, Example 3, and Example 4 in Table 1 is ≤20g·m -2 ·d -1 , oxygen permeability ≥150cm 3 ·m -2 ·d -1 (0.1MPa) -1 , which can effectively prevent the evaporation of the wet wipes liquid, and at the same time ensure that excess oxygen and other gases in the product can pass through the packaging film.

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

Claims

1. A wet wipe for human body, characterized in that: The invention comprises a substrate, a wet wipes liquid and a packaging bag; the wet wipes liquid is obtained in an electrolytic water generator, and the electrolytic water generator comprises: 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 oxidizing electrolytic water is prepared in the anode chamber, and 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, and the water vapor permeability of the packaging bag is ≤20g·m -2 ·d -1 , oxygen permeability ≥150cm 3 ·m -2 ·d -1 (0.1MPa) -1 ; The pH of the human body wet wipes is 4.0-7.

0.

2. A wet wipe for human body use according to claim 1, characterized in that: The preparation process of the anode electrode is as follows: I. Pretreatment of the substrate: Cut the titanium foil and polish it with sandpaper, then wash it with deionized water, then wash it with alcohol and acid in sequence, then soak it in a 1-10wt% oxalic acid solution for 45-60 minutes, wash it with deionized water for 3-5 times, and dry it for use; II. Preparation of RuO2 electrode: Apply 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 let it cool naturally, then repeat the steps of coating, drying, cooling, calcining and cooling for 10-15 times, finally transfer it to a muffle furnace for calcination, take it out and cool it after calcination to obtain a RuO2 electrode; III. Preparation of anode electrode: The RuO2 electrode obtained in step II is transferred to a vacuum sample stage and sputtered using a high vacuum magnetron sputtering apparatus. The sputtering target is any one of a Cu target, a Sn target, a Zn target or a Mo target. First, the vacuum chamber is evacuated to a pressure of 3-5×10 -4 Pa, introduce protective gas, adjust the vacuum chamber pressure to 1.0 Pa, and then connect the sputtering target to a DC power supply. The sputtering time is 5-10 minutes to obtain an anode electrode.

3. A wet wipe for human body use according to claim 1, characterized in that: The packaging bag is made of a single-layer PE film, and the thickness of the single-layer PE film is 30-75 μm.

4. A wet wipe for human body use according to claim 1, characterized in that: The packaging bag is made of a single-layer BOPP film, and the thickness of the single-layer BOPP film is 10-75 μm.

5. A wet wipe for human body use according to claim 1, characterized in that: The packaging bag is made of a double-layer composite film, the thickness of the double-layer composite film is 50-90 μm, 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 a LDPE film.

6. A wet wipe for human body use according to claim 1, characterized in that: The alcohol washing is performed by ultrasonic treatment in anhydrous ethanol for 10-15 minutes, and the acid washing is performed by ultrasonic treatment in H2SO4 with a concentration of 10-20% for 10-15 minutes.

7. A wet wipe for human body use according to claim 1, characterized in that: The temperatures of the roasting and calcining are both 400-500° C., the time of the roasting is 5-10 minutes, and the time of the calcining is 60-90 minutes.

8. A method for preparing wet wipes for human body, characterized in that: The following steps are involved: S1. Folding: Use a folding machine to fold the substrate, and the conveying traction roller conveys the folded substrate to the liquid adding station; S2, adding liquid: at the liquid adding station, spray the acidic oxidizing electrolyzed water evenly onto the surface of the base fabric, adjust the spraying time, and control the mass ratio of the acidic oxidizing electrolyzed water to the base fabric to be 1.7-2:1; S3, roller coating: conveying the base fabric treated in step S2 to a coating roller for roller coating to form wet wipes, wherein the coating roller is connected to a liquid storage barrel, wherein the liquid storage barrel contains alkaline reduced electrolyzed water, and during roller coating, the mass ratio of the alkaline reduced electrolyzed water to the base fabric is controlled to be 0.3-2:1; S4, cutting: cutting the wet wipes obtained by step S3 according to the set size; S5, packaging: putting the cut wet wipes into packaging bags, and sealing the bags to obtain wet wipes for human use.

9. The method for preparing a wet wipe for human body according to claim 8, characterized in that: The human body wet wipes are single-piece wet wipes products.

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