Antibacterial packaging film

Abstract

The utility model discloses an antibacterial packaging film bag. The film comprises a heat-sealing structure film layer, an antibacterial film layer and a water-blocking structure layer which are sequentially stacked from top to bottom, the heat-sealing structure film layer is a PE film layer, the antibacterial film layer is a zinc oxide and graphene oxide composite antibacterial film layer, and the water-blocking structure layer is a polyvinylidene fluoride film layer. The antibacterial packaging film disclosed by the embodiment of the utility model adopts a design mode that the heat-sealing structure film layer, the antibacterial film layer and the water-blocking structure layer are sequentially arranged from top to bottom, so that the antibacterial and waterproof effects are realized layer by layer, and compared with a film in the related technology, the practical waterproof and antibacterial use effect of the film is better than that of the film in the related technology. The waterproof and antibacterial capabilities of the antibacterial packaging film disclosed by the utility model are remarkably improved, and the requirements of actual use can be better met.

Description

Technical Field

[0001] This utility model relates to the field of film technology, specifically to an antibacterial packaging film. Background Technology

[0002] With the continuous improvement of people's living standards, consumers are paying increasing attention to the hygiene and safety of food and cosmetics. Therefore, antibacterial packaging materials have become an important emerging field. Consequently, antibacterial materials have become a crucial research topic. The raw materials for preparing plastic films include polyolefins, polyvinyl chloride, and polyester. While these packaging films possess good overall performance, their surfaces are prone to the growth of bacteria, mold, algae, and other microorganisms. In particular, the large-scale reproduction and transmission of microorganisms can cause spoilage and deterioration of food and cosmetic packaging, posing a potential risk to consumers.

[0003] Furthermore, bacteria growing on the surface of plastic film products can produce substances that affect human health. When components of the plastic film come into contact with bacteria, they alter the physical and chemical properties of the packaged products, reducing the film's lifespan. Changes in the film's composition can cause problems such as increased transparency, aging, leakage, and breakage. These changes may also form new substances that are harmful to consumers. Therefore, it is necessary to use highly effective and long-lasting antibacterial agents in combination with plastic films to give the film material antibacterial properties. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of this utility model propose an antibacterial packaging film.

[0006] The antibacterial packaging film of this utility model embodiment includes a heat-sealing structural film layer, an antibacterial film layer and a water-blocking structural layer stacked sequentially from top to bottom. The heat-sealing structural film layer is a PE film layer, the antibacterial film layer is a zinc oxide and graphene oxide composite antibacterial film layer, and the water-blocking structural layer is a polyvinylidene fluoride film layer.

[0007] In some embodiments, the mass ratio of zinc oxide nanoparticles to graphene oxide in the zinc oxide and graphene oxide composite antibacterial film is 3:1 to 8:1.

[0008] In some embodiments, the graphene oxide in the zinc oxide and graphene oxide composite antibacterial film is a single layer of graphene oxide.

[0009] In some embodiments, the thickness of the graphene oxide film is 300 nm.

[0010] In some embodiments, the mass ratio of carbon to oxygen in the graphene oxide film is 9:1 to 12:1.

[0011] In some embodiments, the heat-sealing structural film layer, the antibacterial film layer, and the water-blocking structural layer are bonded together by an adhesive.

[0012] In some embodiments, the adhesive comprises an aqueous solution of polyvinyl alcohol.

[0013] In some embodiments, the mass ratio of polyvinyl alcohol to water in the polyvinyl alcohol aqueous solution is 4:100 to 8:100.

[0014] In some embodiments, the thickness of the water-blocking structural layer is 10μm-40μm.

[0015] The antibacterial packaging film of this utility model adopts a design in which a heat-sealed structural film layer, an antibacterial film layer, and a water-blocking structural layer are arranged sequentially from top to bottom, achieving antibacterial and waterproof effects layer by layer. In terms of actual use effect of waterproof and antibacterial film, compared with films in related technologies, the waterproof and antibacterial capabilities of the antibacterial packaging film of this utility model are significantly increased, which can better meet the needs of actual use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the antibacterial packaging film according to an embodiment of the present invention.

[0017] Figure label:

[0018] 100. Antibacterial packaging film; 1. Heat-sealing structural film layer; 2. Antibacterial film layer; 3. Water-blocking structural layer. Detailed Implementation

[0019] The embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] like Figure 1 As shown, the antibacterial packaging film 100 of this utility model embodiment includes a heat-sealing structural film layer 1, an antibacterial film layer 2 and a water-blocking structural layer 3 stacked sequentially from top to bottom. The heat-sealing structural film layer 1 is a PE film layer, the antibacterial film layer 2 is a composite antibacterial film layer of zinc oxide and graphene oxide, and the water-blocking structural layer 3 is a polyvinylidene fluoride film layer.

[0021] The addition of the zinc oxide and graphene oxide composite antibacterial film layer 2 endows the packaging film with excellent antibacterial properties, effectively inhibiting the growth of bacteria, fungi, and other microorganisms, and ensuring the hygiene and safety of the packaged contents. The heat-sealing structure film layer 1 uses a PE film layer, which has excellent heat-sealing performance, ensuring the packaging's airtightness and preventing leakage. The water-blocking structure layer 3 uses a polyvinylidene fluoride (PVDF) film layer, which has excellent water-blocking properties, effectively preventing moisture from entering the packaging and keeping the contents dry.

[0022] Therefore, the antibacterial packaging film 100 of this utility model adopts a design in which the heat-sealed structure film layer 1, the antibacterial film layer 2, and the water-blocking structure layer 3 are arranged sequentially from top to bottom, so as to achieve antibacterial and waterproof effects layer by layer. In terms of the actual use effect of waterproof and antibacterial film, compared with the film in related technologies, the waterproof and antibacterial capabilities of the antibacterial packaging film 100 of this utility model are significantly increased, which can better meet the needs of actual use.

[0023] In some embodiments, the mass ratio of zinc oxide nanoparticles to graphene oxide in the zinc oxide and graphene oxide composite antibacterial film layer 2 is 3:1-8:1.

[0024] Specifically, the preparation process of graphene oxide films includes:

[0025] 1g of graphite, 0.1g of potassium persulfate, 0.3g of ferric chloride, and 30ml of water were stirred at 35°C to carry out the reaction.

[0026] Then slowly add 5g of potassium permanganate to the above raw materials, continue stirring and heat to 30°C, stir for 30 minutes, then heat to 98°C and stir for 1 hour;

[0027] Then add 9g of water to the above raw materials and keep the raw materials heated to 98°C. Stir for 10 minutes, then anneal and stir and cool to room temperature. Add hydrochloric acid to the above raw materials until the pH is less than 2, add 35ml of water and let stand for 6 hours to wash the above raw materials.

[0028] Then, the pH of the washed raw materials was adjusted to neutral using 0.1M hydrochloric acid, and then freeze-dried using a freeze dryer to obtain powdered graphene oxide.

[0029] By using the specific preparation process for graphene oxide described above, high-quality monolayer graphene oxide can be obtained.

[0030] Specifically, the zinc oxide and graphene oxide composite antibacterial film layer 2 is prepared by the following method: graphene oxide is fully dispersed in water, then zinc oxide is added, and after ultrasonic stirring, it is uniformly mixed and dispersed, and then dried to obtain the zinc oxide and graphene oxide composite antibacterial film layer 2.

[0031] Using the above ratio, when preparing the zinc oxide and graphene oxide composite antibacterial film layer 2, the graphene oxide is well dispersed, and the dispersed graphene oxide can be better mixed uniformly with zinc oxide, so that the zinc oxide nanoparticles can be better attached to the surface of the graphene oxide, thereby more effectively realizing the antibacterial effect of the zinc oxide nanoparticles and the conductive effect of the graphene oxide, thereby improving the water vapor barrier and antibacterial effect of the subsequently obtained antibacterial packaging film 100.

[0032] In some embodiments, the graphene oxide in the zinc oxide and graphene oxide composite antibacterial film layer 2 is a single layer of graphene oxide. Using a single-layer graphene oxide film ensures better dispersion of the obtained graphene oxide, resulting in excellent antibacterial effect of the zinc oxide and graphene oxide composite antibacterial film layer 2.

[0033] Optionally, the graphene oxide film has a thickness of 300 nm. A graphene oxide film with a thickness of 300 nm can ensure antibacterial effect without affecting the overall performance of the packaging film.

[0034] Preferably, the mass ratio of carbon to oxygen in the graphene oxide film is 9:1 to 12:1. This mass ratio ensures the stability of the graphene oxide and improves its antibacterial effect.

[0035] In some embodiments, the heat-sealable structural film layer 1, the antibacterial film layer 2, and the water-blocking structural layer 3 are bonded together by an adhesive. This bonding increases the applicability and flexibility of the packaging film.

[0036] In some embodiments, the adhesive comprises an aqueous solution of polyvinyl alcohol. Using an aqueous solution of polyvinyl alcohol as an adhesive provides good bonding performance and is environmentally friendly and harmless.

[0037] Optionally, the mass ratio of polyvinyl alcohol to water in the polyvinyl alcohol aqueous solution is 4:100 to 8:100. This mass ratio ensures the adhesive strength and stability of the adhesive.

[0038] In some embodiments, the thickness of the water-blocking structural layer 3 is 10μm-40μm. A thickness between 10μm and 40μm ensures the water-blocking effect without excessively increasing the thickness of the packaging film, thus affecting its use.

[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An antibacterial packaging film, characterized in that, The application relates to a heat-sealable structure film, which comprises, from top to bottom, a heat-sealable structure film layer, an antibacterial film layer and a water-blocking structure layer.

2. The antimicrobial packaging film according to claim 1, wherein, The graphene oxide in the zinc oxide and graphene oxide composite antibacterial film layer is a single-layer graphene oxide film.

3. The antimicrobial packaging film according to claim 2, wherein, The thickness of the graphene oxide film is 300 nm.

4. The antimicrobial packaging film according to claim 1, wherein The heat-sealable structure film layer, the antibacterial film layer and the water-blocking structure layer are connected by an adhesive.

5. The antimicrobial packaging film according to claim 4, wherein, The adhesive comprises a polyvinyl alcohol aqueous solution.

6. The antimicrobial packaging film according to claim 1, wherein The thickness of the water-blocking structure layer is 10-40 microns.

Images