A paper-based antibacterial and moisturizing module, a preparation method and application thereof, and a fruit and vegetable moisturizing and freshness maintaining box

Abstract

The application belongs to the technical field of food preservation, and particularly relates to a paper-based antibacterial and moisturizing module, a preparation method and application thereof, and a fruit and vegetable moisturizing and fresh-keeping box. The preparation method of the paper-based antibacterial and moisturizing module provided by the application comprises the following steps: mixing wood pulp and adsorbent material, and forming a type by papermaking to obtain a moisturizing base paper; loading a negative ion functional material on the moisturizing base paper to obtain a negative ion moisturizing base paper; laying an antibacterial and bacteriostatic powder on the negative ion moisturizing base paper to obtain an antibacterial and moisturizing base paper; and packaging the antibacterial and moisturizing base paper by using a breathable packaging layer to obtain the paper-based antibacterial and moisturizing module. The paper-based antibacterial and moisturizing module obtained by the preparation method has the functions of purifying the environment and radiating far infrared rays, and has excellent antibacterial and moisturizing effects.

Description

Technical Field

[0001] This invention belongs to the field of food preservation technology, specifically relating to a paper-based antibacterial and moisturizing module, its preparation method and application, and a fruit and vegetable moisturizing and freshness-preserving box. Background Technology

[0002] The importance of food preservation technology is mainly reflected in extending food shelf life, increasing nutritional value, and diversifying food texture and flavor. In the research and application of food preservation technology, various methods have been explored. For example, the use of food preservatives can effectively extend the shelf life of food. Furthermore, certain food preservation techniques, such as the use of ascorbic acid, can effectively preserve and increase the nutritional value of food.

[0003] Temperature, humidity, and gaseous environment are the three major factors affecting the preservation of fruits and vegetables. Current food preservation technologies primarily focus on controlling the temperature and humidity of the preservation environment, such as refrigeration, freezing, and humidity control. However, during food preservation, the gaseous environment and the reproduction and growth of microorganisms are significant factors leading to food spoilage. Existing preservation technologies often only focus on controlling temperature and humidity, neglecting the impact of the gaseous and microbial environment on food preservation, thus failing to achieve effective freshness maintenance. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a paper-based antibacterial and moisturizing module, its preparation method and application, and a fruit and vegetable moisturizing and freshness-preserving box. The paper-based antibacterial and moisturizing module obtained by the preparation method provided by this invention has the functions of purifying the environment and radiating far-infrared rays, and has excellent antibacterial and moisturizing effects.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention provides a method for preparing a paper-based antibacterial and moisturizing module, comprising the following steps:

[0007] Wood pulp and absorbent material are mixed and formed into paper to obtain moisture-retaining base paper.

[0008] By loading negative ion functional materials onto the moisturizing base paper, a negative ion moisturizing base paper is obtained.

[0009] Antibacterial and bacteriostatic powder is laid on the negative ion moisturizing base paper to obtain antibacterial moisturizing base paper;

[0010] The antibacterial and moisturizing base paper is encapsulated with a breathable encapsulation layer to obtain the paper-based antibacterial and moisturizing module.

[0011] Preferably, the wood pulp comprises softwood pulp and / or hardwood pulp;

[0012] The adsorption material includes one or more of diatomaceous earth, activated carbon, and MOFS materials;

[0013] The mass ratio of wood pulp to adsorbent material is 60-100:5-30.

[0014] Preferably, the method of loading the negative ion functional material includes:

[0015] The surface of the moisturizing base paper is coated with an antibacterial slurry, or the moisturizing base paper is impregnated in an antibacterial solution.

[0016] Preferably, the antibacterial slurry comprises, by weight, 100 parts of a first negative ion material, 20-30 parts of latex, 40-60 parts of polyvinyl alcohol, 0.1-0.4 parts of dispersant, and 40-65 parts of water; the first negative ion material is negative ion powder or tourmaline powder.

[0017] The coating amount of the antibacterial slurry is 15-50 g / m². 2 .

[0018] Preferably, the antibacterial solution comprises, by weight, 1 part of a second negative ion material, 0-0.5 parts of an activator, and 1-5 parts of water; the second negative ion material is a negative ion stock solution.

[0019] The impregnation amount of the antibacterial solution is 15-50 g / m³. 2 .

[0020] Preferably, the antibacterial and bacteriostatic powder is a quaternary ammonium salt powder.

[0021] Preferably, the amount of the antibacterial and bacteriostatic powder applied is 5-15 g / m². 2 .

[0022] The present invention also provides a paper-based antibacterial and moisturizing module prepared by the preparation method described above, comprising antibacterial and moisturizing base paper and a breathable encapsulation layer covering the surface of the antibacterial and moisturizing base paper;

[0023] The antibacterial and moisturizing base paper includes negative ion moisturizing base paper and antibacterial and bacteriostatic powder laid on the surface of the negative ion moisturizing base paper;

[0024] The negative ion moisturizing paper includes a moisturizing paper and a negative ion functional material loaded on the moisturizing paper.

[0025] The present invention also provides the application of the paper-based antibacterial and moisturizing module described in the above technical solution in the field of food preservation.

[0026] The present invention also provides a fruit and vegetable moisturizing and freshness-preserving box, wherein a freshness-preserving module is mounted on the inner wall or lid of the fruit and vegetable moisturizing and freshness-preserving box; the freshness-preserving module is the paper-based antibacterial and moisturizing module described in the above technical solution.

[0027] This invention provides a method for preparing a paper-based antibacterial and moisturizing module, comprising the following steps: mixing wood pulp and adsorbent material, forming a paper to obtain a moisturizing base paper; loading negative ion functional material onto the moisturizing base paper to obtain a negative ion moisturizing base paper; laying antibacterial and bacteriostatic powder on the negative ion moisturizing base paper to obtain an antibacterial moisturizing base paper; and encapsulating the antibacterial moisturizing base paper with a breathable encapsulation layer to obtain the paper-based antibacterial and moisturizing module. In the preparation method provided by this invention, the moisturizing base paper has moisturizing and humidity-regulating properties and is sensitive to changes in environmental humidity. Through the combined action of internal structures such as fiber capillaries and hydrogen bonds, it can regulate the humidity of an environment within a certain volume. The negative ion functional material can synergistically solve the problems of the gaseous and microbial environment in the micro-space of fruit and vegetable preservation, thereby resulting in an excellent moisturizing and preservation performance of the obtained paper-based antibacterial and moisturizing module.

[0028] The fruit and vegetable moisturizing and freshness-preserving box provided by this invention can create a high-humidity storage environment for fruits and vegetables without condensation, and continuously release negative ions and emit far-infrared rays, which have antibacterial and bactericidal effects, thereby improving the internal microbial environment of the space. Detailed Implementation

[0029] This invention provides a method for preparing a paper-based antibacterial and moisturizing module, comprising the following steps:

[0030] Wood pulp and absorbent material are mixed and formed into paper to obtain moisture-retaining base paper.

[0031] By loading negative ion functional materials onto the moisturizing base paper, a negative ion moisturizing base paper is obtained.

[0032] Antibacterial and bacteriostatic powder is laid on the negative ion moisturizing base paper to obtain antibacterial moisturizing base paper;

[0033] The antibacterial and moisturizing base paper is encapsulated with a breathable encapsulation layer to obtain the paper-based antibacterial and moisturizing module.

[0034] In this invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.

[0035] This invention mixes wood pulp and absorbent material, then forms the paper to obtain a moisture-retaining base paper.

[0036] In this invention, the wood pulp preferably includes softwood pulp and / or hardwood pulp, more preferably softwood pulp and hardwood pulp; the softwood pulp is preferably bleached sulfate softwood pulp; the hardwood pulp is preferably bleached sulfate hardwood pulp; when the wood pulp is softwood pulp and hardwood pulp, the mass ratio of the softwood pulp to the hardwood pulp is preferably 45-70:15-30, more preferably 50-65:20-30, and most preferably 55-65:20-30.

[0037] In this invention, the softwood pulp and hardwood pulp serve as scaffold fiber raw materials.

[0038] In this invention, the adsorption material preferably includes one or more of diatomaceous earth, activated carbon and MOFS materials, more preferably diatomaceous earth and / or activated carbon, and most preferably diatomaceous earth.

[0039] In this invention, the mass ratio of wood pulp to adsorbent material is preferably 60-100:5-30, more preferably 70-90:10-25, and most preferably 80-90:10-20.

[0040] In this invention, the diatomaceous earth in the adsorption material contains abundant polyactive groups. On the one hand, it adsorbs onto the surface of bacteria, destroys the cell membrane structure, causes intracellular substances to leak out, and triggers autophagy. On the other hand, it can adsorb more negative ion materials and gases in the refrigerator.

[0041] The present invention does not impose any special limitations on the mixing process; any method known to those skilled in the art can be used.

[0042] In this invention, the paper forming equipment is preferably a cylinder paper machine or a wire paper machine; this invention does not impose any special limitations on the paper forming process, and any method known to those skilled in the art can be used.

[0043] In this invention, the basis weight of the moisture-retaining base paper is preferably 150-250 g / m². 2 More preferably, it is 160–220 g / m 2 The optimal value is 160–200 g / m³. 2 .

[0044] After obtaining the moisturizing base paper, the present invention loads negative ion functional materials onto the moisturizing base paper to obtain negative ion moisturizing base paper.

[0045] In this invention, the preferred method of loading the negative ion functional material includes: coating the surface of the moisturizing base paper with an antibacterial slurry, or impregnating the moisturizing base paper in an antibacterial solution.

[0046] In this invention, the antibacterial slurry preferably comprises, by weight, 100 parts of a first negative ion material, 20-30 parts of latex, 40-60 parts of polyvinyl alcohol, 0.1-0.4 parts of dispersant, and 40-65 parts of water.

[0047] According to the mass fraction, the antibacterial slurry of the present invention preferably includes 100 parts of a first negative ion material; the first negative ion material is preferably negative ion powder or tourmaline powder.

[0048] Based on the mass fraction of the first negative ion material, the antibacterial slurry of the present invention preferably includes 20-30 parts of latex, more preferably 22-25 parts, and most preferably 24 parts; the latex is preferably an acrylic latex; the acrylic latex is preferably of type 26450; and the mass fraction of the acrylic latex is preferably 45%.

[0049] Based on the mass fraction of the first negative ion material, the antibacterial slurry of the present invention preferably includes 40-60 parts of polyvinyl alcohol, more preferably 48-55 parts, and most preferably 50 parts; the polyvinyl alcohol is preferably of type 1799; the polyvinyl alcohol is preferably a polyvinyl alcohol solution; the mass percentage of polyvinyl alcohol in the polyvinyl alcohol solution is preferably 6.5-9.5%, more preferably 7.5-9%, and most preferably 8%.

[0050] Based on the mass fraction of the first negative ion material, the antibacterial slurry of the present invention preferably includes 0.1 to 0.4 parts of dispersant, more preferably 0.3 to 0.4 parts, and most preferably 0.35 parts; the dispersant is preferably polyethylene oxide; the polyethylene oxide is preferably a polyethylene oxide solution; the mass percentage of polyethylene oxide in the polyethylene oxide solution is preferably 0.5 to 1.0%.

[0051] Based on the mass fraction of the first negative ion material, the antibacterial slurry of the present invention preferably includes 40 to 65 parts of water, more preferably 50 to 65 parts, and most preferably 62 parts.

[0052] In this invention, the method for preparing the antibacterial slurry preferably includes the following steps:

[0053] The antibacterial slurry is obtained by mixing the first negative ion material, latex, polyvinyl alcohol, dispersant and water.

[0054] In this invention, the preferred mixing order is to add first water, first negative ion material, dispersant, polyvinyl alcohol, latex, and second water sequentially. This invention does not impose any special limitations on the ratio of the first water to the second water; any method commonly used by those skilled in the art can be employed to uniformly disperse the resulting antibacterial slurry. The mixing equipment is preferably a high-speed homogenizer. The rotation speed of the high-speed homogenizer is preferably 7000–20000 rpm, more preferably 8000–15000 rpm, and most preferably 10000 rpm.

[0055] In this invention, the mixing process preferably includes sieving; the mesh size of the sieve is preferably 90-120 mesh, more preferably 95-105 mesh, and most preferably 100 mesh.

[0056] In this invention, the coating amount of the antibacterial slurry is preferably 15-50 g / m³. 2More preferably 25–45 g / m 2 The optimal value is 30-40 g / m 2 The coating equipment is preferably a coating machine.

[0057] In this invention, the antibacterial solution preferably comprises 1 part of a second negative ion material, 0-0.5 parts of an activator, and 1-5 parts of water, by weight; more preferably, the second negative ion material is 1 part; the activator is more preferably 0.2 parts; and the water is more preferably 2-4 parts; the second negative ion material is preferably a negative ion stock solution. This invention does not impose any special limitations on the preparation method of the antibacterial solution; any dilution method well-known to those skilled in the art can be used to obtain an antibacterial solution with components within the above-mentioned weight range. In this invention, the negative ion functional material has a spatial antibacterial effect by releasing negative ions and emitting far-infrared rays, and can also remove ethylene and deodorize.

[0058] In this invention, the impregnation amount of the antibacterial solution is preferably 15-50 g / m³. 2 More preferably 25–45 g / m 2 The optimal value is 30-40 g / m 2 The present invention does not impose any special limitations on the impregnation process; any method known to those skilled in the art can be used to achieve the above-mentioned impregnation amount.

[0059] After obtaining the negative ion moisturizing base paper, the present invention lays antibacterial and bacteriostatic powder on the negative ion moisturizing base paper to obtain antibacterial moisturizing base paper.

[0060] In this invention, the antibacterial and bacteriostatic powder is preferably a quaternary ammonium salt powder; this invention does not impose any special limitation on the type of quaternary ammonium salt powder, and any type of quaternary ammonium salt powder well known to those skilled in the art can be used as the antibacterial and bacteriostatic powder; in the embodiments of this invention, the quaternary ammonium salt powder is preferably a cyanoquaternary ammonium salt powder, a dialkylquaternary ammonium salt, or a chitosan quaternary ammonium salt powder; the preferred application amount of the antibacterial and bacteriostatic powder is 5-15 g / m². 2 More preferably 10-15 g / m 2 The preferred equipment for laying the coating is a coating machine.

[0061] In this invention, the quaternary ammonium salt is used as an antibacterial and bactericidal organic moisture-sensitive material.

[0062] After obtaining the antibacterial and moisturizing base paper, the present invention encapsulates the antibacterial and moisturizing base paper with a breathable encapsulation layer to obtain the paper-based antibacterial and moisturizing module.

[0063] In this invention, the breathable sealing layer is preferably a non-woven fabric; the non-woven fabric is preferably an antibacterial and mildew-resistant non-woven fabric.

[0064] In this invention, the antibacterial and mildew-proof nonwoven fabric serves to protect the antibacterial and moisturizing base paper and provides contact-type antibacterial and mildew-proof effects.

[0065] In this invention, the encapsulation method is preferably heat-sealing composite; this invention does not impose any special limitations on the heat-sealing composite process, and any method known to those skilled in the art can be used.

[0066] In the preparation method provided by this invention, the moisturizing base paper has moisturizing and humidity-regulating properties and is relatively sensitive to changes in environmental humidity. Through the combined action of internal structures such as fiber capillaries and hydrogen bonds, it can regulate the humidity of the environment within a certain volume. The antibacterial and bacteriostatic powder can work synergistically with the above materials to solve the problems of gaseous and microbial environments in the micro-space of fruit and vegetable preservation, thereby making the obtained paper-based antibacterial moisturizing module have excellent moisturizing and preservation performance.

[0067] The present invention also provides a paper-based antibacterial and moisturizing module prepared by the preparation method described above, comprising antibacterial and moisturizing base paper and a breathable encapsulation layer covering the surface of the antibacterial and moisturizing base paper;

[0068] The antibacterial and moisturizing base paper includes negative ion moisturizing base paper and antibacterial and bacteriostatic powder laid on the surface of the negative ion moisturizing base paper;

[0069] The negative ion moisturizing paper includes a moisturizing paper and a negative ion functional material loaded on the moisturizing paper.

[0070] In this invention, the moisture permeability of the paper-based antibacterial and moisturizing module is preferably 550–1000 g / (m³). 2 ·24h), more preferably 650~850g / (m 2 •24h), the optimal value is 700-800 g / (m 2 • 24h); negative ion release rate is 500–2500 ions / cm³ 3 More preferably, 600–2500 per cm 3 The optimal number is 750–2000 per cm. 3 The antibacterial rate of Escherichia coli is preferably greater than 99.99%, and the antibacterial rate of Staphylococcus aureus is preferably greater than 99.99%.

[0071] The present invention also provides the application of the paper-based antibacterial and moisturizing module described above in the field of food preservation.

[0072] In this invention, the paper-based antibacterial and moisturizing module is preferably used in the field of food preservation, specifically in fruit and vegetable moisturizing and fresh-keeping boxes or refrigerator drawers.

[0073] In this invention, the paper-based antibacterial and moisturizing module is mounted on the refrigerator drawer cover and can serve as a core component for dry and wet storage, playing a role in moisturizing, antibacterial and deodorizing, purifying the internal air, and decomposing harmful gases.

[0074] The present invention also provides a fruit and vegetable moisturizing and freshness-preserving box, wherein a freshness-preserving module is mounted on the inner wall or lid of the fruit and vegetable moisturizing and freshness-preserving box; the freshness-preserving module is the paper-based antibacterial and moisturizing module described in the above technical solution.

[0075] The fruit and vegetable moisturizing and freshness-preserving box provided by this invention can create a high-humidity storage environment for fruits and vegetables without condensation, and continuously release negative ions and emit far-infrared rays, which have antibacterial and bactericidal effects, thereby improving the internal microbial environment of the space.

[0076] To further illustrate the present invention, the following detailed description, in conjunction with embodiments, of the paper-based antibacterial and moisturizing module, its preparation method and application, and the fruit and vegetable moisturizing and freshness-preserving box provided by the present invention, should not be construed as limiting the scope of protection of the present invention.

[0077] Example 1

[0078] 56 parts of softwood pulp, 24 parts of hardwood pulp, and 20 parts of diatomaceous earth were mixed and formed using a long-wire paper machine to obtain a paper with a density of 180 g / m³. 2 Moisturizing base paper;

[0079] Take 100g of water and add 230g of negative ion powder to a high-speed homogenizer at 10000rpm until it becomes viscous and resembles chocolate. Then, add 0.8g of polyethylene oxide dispersant, 115.8g of 8wt% polyvinyl alcohol (model 1799), and 54.7g of 45wt% acrylic latex (model 26450). Continue to add 43g of water and pass the mixture through a 100-mesh sieve to obtain the negative ion slurry.

[0080] A negative ion paste was coated onto the surface of the moisturizing base paper using a coating machine, with a coating amount of 35 g / m². 2 This yields a negative ion moisturizing paper.

[0081] A cyano quaternary ammonium salt powder was applied to the surface of the negative ion moisturizing base paper using a coating machine at a rate of 10 g / m². 2 This yields antibacterial and moisturizing base paper;

[0082] The antibacterial and moisturizing base paper is encapsulated with non-woven fabric to obtain a paper-based antibacterial and moisturizing module.

[0083] The paper-based antibacterial and moisturizing module prepared in this embodiment has a moisture permeability of 800g / (m²). 2 • 24h), negative ion release reaches 1400 ions / cm³ within 10 minutes. 3The antibacterial rate of Escherichia coli is greater than 99.99%, and the antibacterial rate of Staphylococcus aureus is greater than 99.99%.

[0084] Example 2

[0085] 63 parts of softwood pulp, 27 parts of hardwood pulp, and 10 parts of diatomaceous earth were mixed and formed into paper using a cylinder paper machine to obtain a paper with a density of 170 g / m³. 2 Moisturizing base paper;

[0086] Dilute the negative ion stock solution with water three times, and soak the moisturizing paper in the diluted negative ion stock solution at a concentration of 22g / m². 2 This yields a negative ion moisturizing paper.

[0087] Dialkyl quaternary ammonium salt powder was applied to the surface of the negative ion moisturizing base paper using a coating machine, with a coating amount of 10 g / m². 2 This yields antibacterial and moisturizing base paper;

[0088] The antibacterial and moisturizing base paper is encapsulated with non-woven fabric to obtain a paper-based antibacterial and moisturizing module.

[0089] The paper-based antibacterial and moisturizing module prepared in this embodiment has a moisture permeability of 700 g / (m²). 2 • 24h), negative ion release reaches 1500 ions / cm³ within 10 minutes. 3 The antibacterial rate of Escherichia coli is greater than 99.99%, and the antibacterial rate of Staphylococcus aureus is greater than 99.99%.

[0090] Comparative Example

[0091] 60 parts of softwood pulp, 25 parts of hardwood pulp, and 15 parts of diatomaceous earth were mixed and formed into paper using a long-wire paper machine to obtain a paper with a density of 160 g / m³. 2 Moisturizing base paper;

[0092] A cyano quaternary ammonium salt powder was applied to the surface of the negative ion moisturizing base paper using a coating machine at a rate of 10 g / m². 2 This yields antibacterial and moisturizing base paper;

[0093] The antibacterial and moisturizing base paper is encapsulated with non-woven fabric to obtain a paper-based antibacterial and moisturizing module.

[0094] The paper-based antibacterial and moisturizing module prepared in this comparative example has a moisture permeability of 600 g / (m²). 2 (24h) The antibacterial rate of Escherichia coli was 93.9%, and the antibacterial rate of Staphylococcus aureus was 95.9%.

[0095] As can be seen from the above embodiments, the preparation method provided by the present invention utilizes the moisture-regulating properties of the moisturizing base paper, which is highly sensitive to changes in environmental humidity. Through the combined action of internal structures such as fiber capillaries and hydrogen bonds, it can regulate the humidity of the environment within a certain volume. The negative ion slurry or stock solution has a spatial antibacterial effect by releasing negative ions and emitting far-infrared rays, and can also remove ethylene and deodorize. Quaternary ammonium salt, as an antibacterial and bactericidal organic moisture-sensitive material, can work synergistically with the above materials to solve the problems of the gaseous environment and microbial environment in the micro-space of fruit and vegetable preservation, thereby making the obtained paper-based antibacterial and moisturizing module have excellent moisture-regulating and preservation performance.

[0096] Although the above embodiments have provided a detailed description of the present invention, they are only some embodiments of the present invention, and not all embodiments. People can obtain other embodiments based on these embodiments without creative effort, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A method for preparing a paper-based antibacterial and moisturizing module, characterized in that, Includes the following steps: Wood pulp and adsorbent material are mixed and formed into a moisture-retaining base paper. The adsorbent material is diatomaceous earth, and the mass ratio of wood pulp to adsorbent material is 80-90:10-20. By loading negative ion functional materials onto the moisturizing base paper, a negative ion moisturizing base paper is obtained. The method of loading negative ion functional material includes: coating the surface of moisturizing base paper with an antibacterial slurry, or impregnating the moisturizing base paper in an antibacterial solution; the antibacterial slurry comprises, by weight, 100 parts of a first negative ion material, 24 parts of latex, 50 parts of polyvinyl alcohol, 0.35 parts of dispersant, and 62 parts of water; the first negative ion material is a negative ion powder, the latex is an acrylic latex, the dispersant is a polyethylene oxide solution, and the polyethylene oxide solution contains 0.5-1.0% polyethylene oxide by weight; the coating amount of the antibacterial slurry is 30-40 g / m³. 2 The antibacterial solution comprises, by weight, 1 part of a second negative ion material, 0.2 parts of an activator, and 2-4 parts of water; the second negative ion material is a negative ion stock solution; the impregnation amount of the antibacterial solution is 30-40 g / m³. 2 ; Antibacterial and bacteriostatic powder is spread onto the negative ion moisturizing base paper to obtain antibacterial and moisturizing base paper. The antibacterial and bacteriostatic powder is quaternary ammonium salt powder, and the spreading amount of the antibacterial and bacteriostatic powder is 10~15g / m². 2 ; The antibacterial and moisturizing base paper is encapsulated with a breathable encapsulation layer to obtain the paper-based antibacterial and moisturizing module.

2. The preparation method according to claim 1, characterized in that, The wood pulp includes softwood pulp and / or hardwood pulp.

3. The preparation method according to claim 1, characterized in that, The first negative ion material is tourmaline powder.

4. The paper-based antibacterial and moisturizing module prepared by the method according to any one of claims 1 to 3, characterized in that, It includes an antibacterial and moisturizing base paper and a breathable encapsulation layer covering the surface of the antibacterial and moisturizing base paper; The antibacterial and moisturizing base paper includes negative ion moisturizing base paper and antibacterial and bacteriostatic powder laid on the surface of the negative ion moisturizing base paper; The negative ion moisturizing paper includes a moisturizing paper and a negative ion functional material loaded on the moisturizing paper.

5. The application of the paper-based antibacterial and moisturizing module according to claim 4 in the field of food preservation.

6. A fruit and vegetable moisture-preserving box, characterized in that, The inner wall or lid of the fruit and vegetable moisturizing and fresh-keeping box is equipped with a fresh-keeping module; the fresh-keeping module is the paper-based antibacterial and moisturizing module as described in claim 4.