Antibacterial and antiseptic food packaging film

Abstract

The utility model discloses an antibacterial and antiseptic food packaging film, which comprises a base film layer, on which a barrier film layer, a first antibacterial layer, an antiseptic layer and a waterproof layer are successively arranged. A second antibacterial layer is arranged under the base film layer, and the lowermost layer is a heat-sealing bottom layer. An outer ring is configured with a "匚"-shaped clamping mechanism to enhance the bonding stability between the film layers. Among them, the base film layer is preferably a cellulose film, which has good biodegradability and mechanical properties; the barrier film layer is made of a PVDC film, which effectively blocks the penetration of oxygen and moisture; the first and second antibacterial layers adopt zinc oxide or titanium dioxide coatings to achieve high-efficiency antibacterial; the antiseptic layer adopts a lysozyme coating to protect food by using the principle of biological antiseptic. The unique design of the clamping mechanism effectively prevents interlayer peeling and improves the structural stability of the composite film. This packaging film combines multiple protection functions, greatly improves the freshness preservation period and safety of food, and is applicable to various food packaging requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging films, in particular to an antibacterial and antiseptic food packaging film. Background Art

[0002] With the development of the food industry and the increasing demands of consumers for food safety, shelf life and environmental protection, the design and performance optimization of food packaging materials are particularly important. Existing food packaging films, in addition to meeting the basic packaging function, often fail to fully meet the requirements of multiple properties such as antiseptic, antibacterial and waterproof. Due to its limited barrier properties, traditional single-structure packaging films may cause food to deteriorate faster during storage and transportation due to oxygen, moisture penetration and microbial contamination, shortening the shelf life.

[0003] In existing packaging technologies, although some patents have achieved the addition of antibacterial and antiseptic ingredients to packaging films, these film layer structures may cause performance degradation during long-term use due to insufficient interlayer bonding, affecting the overall protective effect of the packaging film. In addition, for multi-layer composite packaging films, the stability between the layers is a key factor. If the interlayer peeling strength is insufficient, it will not only affect the functional performance of the packaging film, but may also cause quality problems during processing and use, such as delamination and breakage.

[0004] In view of this, it is urgent to develop a new type of antibacterial and antiseptic food packaging film. Utility Model Content

[0005] In view of the deficiencies in the background technology, the utility model provides an antibacterial and antiseptic food packaging film.

[0006] The technical solution adopted by the utility model is: an antibacterial and antiseptic food packaging film, comprising a base film layer, a barrier film layer is arranged above the base film layer, a first antibacterial layer is arranged above the barrier film layer, an antiseptic layer is arranged above the first antibacterial layer, a waterproof layer is arranged above the antiseptic layer, a second antibacterial layer is arranged below the base film layer, a heat-sealing bottom layer is arranged below the second antibacterial layer, and a clamping mechanism is arranged on the outer ring of the packaging film.

[0007] Furthermore, the base film layer is a cellulose film or a cellulose film.

[0008] Furthermore, the first antibacterial layer and the second antibacterial layer are zinc oxide coatings or titanium dioxide coatings.

[0009] Furthermore, the thickness of the first antibacterial layer and the second antibacterial layer is 4 μm-8 μm.

[0010] Furthermore, the barrier film layer is a PVDC film.

[0011] Further, the anti-corrosion layer is a lysozyme coating.

[0012] Further, the cross-section of the clamping mechanism is a "C"-shaped structure, which surrounds and wraps around the outer circle of the waterproof layer and the heat-sealing bottom layer of the packaging film.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. Integrated versatility: The antibacterial and anti-corrosion food packaging film proposed in this application integrates multiple functions such as barrier, antibacterial, anti-corrosion, and waterproofing. Among them, the barrier film layer significantly reduces the impact of oxygen and moisture on food, effectively delaying food spoilage induced by oxidation and moisture; the first and second antibacterial layers are respectively located on the upper and lower sides of the packaging film, forming a double-insurance antibacterial barrier, which can effectively inhibit the growth of microorganisms inside and outside the food, and significantly improve the safety and hygiene level of food.

[0015] 2. Durable and stable protection efficiency: The antibacterial and anti-corrosion components are distributed in the corresponding film layers, ensuring the durability and stability of the antibacterial and anti-corrosion effects, and greatly improving the shelf life and quality guarantee of food.

[0016] 3. Enhanced composite stability: The introduced clamping mechanism design is specifically used to strengthen the composite strength and stability between the layers of the packaging film, effectively solving the problem of interlayer peeling that may occur during the processing, storage, and use of multi-layer composite films, and enhancing the overall mechanical properties and service life of the packaging film.

[0017] In addition to the purposes, features, and advantages described above, the present utility model has other purposes, features, and advantages.

[0018] Next, the present utility model will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of the present utility model.

[0020] Figure 1 : 1. Base film layer; 2. Barrier film layer; 3. First antibacterial layer; 4. Anti-corrosion layer; 5. Waterproof layer; 6. Second antibacterial layer; 7. Heat-sealing bottom layer; 8. Clamping mechanism. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] The utility model provides an antibacterial and antiseptic food packaging film.

[0024] In this embodiment, refer to Figure 1 The antibacterial and antiseptic food packaging film comprises a base film layer 1, a barrier film layer 2 is arranged above the base film layer, a first antibacterial layer 3 is arranged above the barrier film layer, an antiseptic layer 4 is arranged above the first antibacterial layer, a waterproof layer 5 is arranged above the antiseptic layer, a second antibacterial layer 6 is arranged below the base film layer, a heat-sealing bottom layer 7 is arranged below the second antibacterial layer, and a clamping mechanism 8 is arranged on the outer ring of the packaging film.

[0025] The antibacterial and antiseptic food packaging film of the present application adopts a multi-layer composite structure design to achieve all-round and multi-level protection for food. The base film layer serves as the basic bearing structure, and the barrier film layer arranged on it can effectively prevent the penetration of oxygen and moisture, thereby extending the shelf life of food; the arrangement of the first antibacterial layer and the second antibacterial layer forms a double antibacterial barrier inside and outside, effectively inhibiting the growth of microorganisms inside and outside the food packaging; the anti-corrosion layer can specifically prevent food from being spoiled due to microbial activities; the waterproof layer increases the moisture-proof performance of the packaging, preventing the influence of moisture on the quality of food; and the heat-sealing bottom layer ensures the good sealing performance of the packaging film during the heat-sealing process. In addition, the unique clamping mechanism design, by wrapping around the outer ring of the packaging film, greatly enhances the bonding force and stability between the multi-layer film structures, avoids packaging failure caused by interlayer separation, and ensures the long-term stability of the overall performance of the packaging film.

[0026] The composite between layers in this application belongs to the prior art, such as the lamination composite process: first, in order from bottom to top or from top to bottom, the base film layer, barrier film layer, first antibacterial layer, anticorrosive layer, waterproof layer, second antibacterial layer and heat-sealing bottom layer are stacked up in sequence to form a multi-layer structure. During the production process, each layer can be bonded together layer by layer by precise roll-to-roll coating, extrusion composite or dry composite, ensuring that each layer can be evenly and tightly combined. Another example is hot melt composite, etc.

[0027] Specifically, the base film layer is a cellulose film or a cellulose film.

[0028] The cellulose film serves as the base film layer. The cellulose film is derived from natural resources, has good biodegradability and environmental friendliness, and at the same time it also has excellent mechanical properties and air permeability, which helps to balance the internal and external environments of the packaging and further optimizes the comprehensive performance of the packaging film.

[0029] Specifically, the first antibacterial layer and the second antibacterial layer are zinc oxide coatings or titanium dioxide coatings; the thickness of the first antibacterial layer and the second antibacterial layer is 4μm - 8μm.

[0030] The first antibacterial layer and the second antibacterial layer are made of zinc oxide coatings or titanium dioxide coatings. These two materials are both recognized as safe and highly efficient antibacterial agents, which can form a stable antibacterial area on the surface of the packaging film, effectively inhibit the growth of bacteria and molds, and their particle sizes and dispersibility are carefully designed to ensure the antibacterial effect without affecting the transparency and mechanical properties of the packaging film.

[0031] Specifically, the barrier film layer is a PVDC film.

[0032] The barrier film layer is a PVDC film, which is a material with extremely high barrier performance, especially has excellent barrier effects on oxygen and water vapor, can effectively prevent the food inside the packaging from being affected by the external environment, and significantly extend the shelf life of the food.

[0033] Specifically, the anticorrosion layer is a lysozyme coating.

[0034] The anticorrosion layer is a lysozyme coating. Lysozyme, as a natural, safe and highly efficient biological preservative, achieves the antibacterial effect by destroying the bacterial cell wall, and has little influence on the properties of the food itself, can effectively protect the food from microbial invasion, and improve the freshness preservation ability and safety of the food.

[0035] Specifically, the cross-section of the clamping mechanism is a "匚" - shaped structure, which surrounds and wraps around the outer circle of the waterproof layer and the heat - sealing bottom layer of the packaging film.

[0036] The clamping mechanism adopts a "匚" - shaped structure, which can closely fit and firmly lock the upper and lower surfaces (the waterproof layer and the heat - sealing bottom layer) of the packaging film, greatly enhancing the structural stability of the edge part of the packaging film, preventing the interlayer separation phenomenon during handling, storage or heat - sealing, ensuring the integrity and durability of the entire packaging film structure, and further enhancing the practical value and market competitiveness of the packaging film.

[0037] The clamping mechanism can adopt a hot - melt adhesive film. The hot - melt adhesive film can be pre - coated on the outer edge of the packaging film. By heating and pressing, the adhesive layer melts and solidifies after cooling, thus tightly bonding the various layers of the film together and increasing the stability of the overall structure.

[0038] Technical personnel should note: Although the utility model has been described according to the above specific implementation methods, the concept of the utility model is not limited to this utility model. Any modification using the concept of the utility model will be included in the scope of protection of this patent right.

Claims

1. An antibacterial and antiseptic food packaging film, comprising a base film layer, characterized in that: Above the base film layer, there is a barrier film layer. Above the barrier film layer, there is a first antibacterial layer. Above the first antibacterial layer, there is an anti-corrosion layer. Above the anti-corrosion layer, there is a waterproof layer. Below the base film layer, there is a second antibacterial layer. Below the second antibacterial layer, there is a heat-sealing bottom layer. A clamping mechanism is provided on the outer circle of the packaging film.

2. The antibacterial and antiseptic food packaging film according to claim 1, characterized in that: The base film layer is a cellulose film or a cellulose film.

3. The antibacterial and antiseptic food packaging film according to claim 1, characterized in that: The first antibacterial layer and the second antibacterial layer are zinc oxide coatings or titanium dioxide coatings.

4. The antibacterial and antiseptic food packaging film according to claim 3, characterized in that: The thickness of the first antibacterial layer and the second antibacterial layer is 4μm - 8μm.

5. The antibacterial and antiseptic food packaging film according to claim 1, characterized in that: The barrier film layer is a PVDC film.

6. The antibacterial and antiseptic food packaging film according to claim 1, characterized in that: The anti-corrosion layer is a lysozyme coating.

7. The antibacterial and antiseptic food packaging film according to any one of claims 1 to 6, characterized in that: The cross-section of the clamping mechanism is a "匚" - shaped structure, which surrounds and wraps around the outer circles of the waterproof layer and the heat-sealing bottom layer of the packaging film.

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