Multilayer composite food packaging film

Abstract

The utility model discloses a multilayer composite food packaging film, which relates to the technical field of packaging films and comprises a packaging film main body, a protective layer, a barrier layer, an adding layer and a contact layer are respectively arranged in the packaging film main body, the protective layer is arranged at the top of the barrier layer, the barrier layer is arranged at the top of the adding layer, and the adding layer is arranged at the top of the contact layer. An adhesive is arranged between every two of the protective layer, the barrier layer, the adding layer and the contact layer, and the interior of the protective layer is made of a high-density polyethylene material. According to the multi-layer composite food packaging film disclosed by the utility model, a plurality of functional layers are arranged in the packaging film main body and comprise the protective layer, the barrier layer, the adding layer and the contact layer, and the layers are tightly adhered by adopting the water-based adhesive; by adopting a multi-layer composite structure, multiple functions of physical protection, gas and moisture barrier, antibacterial protection, food safety and the like are realized, and the storage safety and freshness of food are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of packaging film technology, and in particular to a multi-layer composite food packaging film. Background Technology

[0002] Multilayer composite food packaging film is a type of packaging film made of two or more different materials, designed to combine the advantages of each layer to improve the preservation, safety, and market competitiveness of food. This type of packaging film is commonly used for packaging various foods, such as dried fruits, frozen foods, cooked foods, and ready-to-eat products, to achieve better protection.

[0003] Existing food packaging film materials use biaxially oriented polypropylene, aluminum foil, and polyethylene structures. However, due to the low mechanical strength of aluminum foil, it is easily torn and broken. Its barrier performance is affected by the number and size of pinholes. During production and use, aluminum foil often breaks and deteriorates, leading to food spoilage and affecting the quality and shelf life of the food. To address these issues, we have developed a multi-layer composite food packaging film. Utility Model Content

[0004] This utility model discloses a multi-layer composite food packaging film, which improves upon the existing structure and its shortcomings to provide a multi-layer composite food packaging film with better practical value.

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

[0006] A multi-layer composite food packaging film includes a packaging film body. The packaging film body has a protective layer, a barrier layer, an additive layer, and a contact layer disposed inside it. The protective layer is disposed on top of the barrier layer, the barrier layer is disposed on top of the additive layer, and the additive layer is disposed on top of the contact layer. An adhesive is disposed between each pair of the protective layer, the barrier layer, the additive layer, and the contact layer. The interior of the protective layer is made of high-density polyethylene material.

[0007] In a preferred embodiment, the interior of the barrier layer is made of polyester material.

[0008] In a preferred embodiment, the interior of the additive layer is composed of an antibacterial agent.

[0009] In a preferred embodiment, the interior of the contact layer is made of a food-grade resin material.

[0010] In a preferred embodiment, the thicknesses of the protective layer, barrier layer, additive layer, and contact layer are equal.

[0011] The multilayer composite food packaging film provided by this utility model has the following advantages:

[0012] Firstly, a protective layer, a barrier layer, an additive layer, and a contact layer are set inside the main body of the packaging film, and water-based adhesives are used to tightly bond each layer together.

[0013] Secondly, the protective layer is made of high-density polyethylene, providing excellent physical protection and water resistance, effectively resisting the effects of the external environment and enhancing the film's tear resistance and mechanical strength. The barrier layer is made of polyester, effectively preventing the permeation of gases (such as oxygen and carbon dioxide) and moisture, thereby extending the shelf life of food and maintaining its freshness and taste. The additive layer contains antimicrobial agents to further inhibit microbial growth and ensure food safety. The contact layer is made of food-grade resin, coming into direct contact with food to ensure safety and prevent migration, providing excellent sealing performance. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of a multi-layer composite food packaging film proposed in this utility model.

[0015] Figure 2 This is a cross-sectional schematic diagram of the internal structure of a multi-layer composite food packaging film proposed in this utility model.

[0016] Figure 3 This is a planar cross-sectional view of the internal material of a multi-layer composite food packaging film proposed in this utility model.

[0017] Figure 4 This is a side view of a multi-layer composite food packaging film proposed in this utility model.

[0018] In the attached diagram: 1. Packaging film body; 2. Protective layer; 3. Barrier layer; 4. Additive layer; 5. Contact layer; 6. Adhesive; 7. High-density polyethylene material; 8. Polyester material; 9. Antibacterial agent; 10. Food-grade resin material. Detailed Implementation

[0019] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] It should be noted that, in the context of use, the terms up, down, left, right, front, back, top, bottom, forward, reverse, clockwise, and counterclockwise in the following description are used merely for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative positions and / or orientations between the various parts of the object and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] It should be noted that, in practice, unless otherwise explicitly specified and limited, the terms "installation," "fixing," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a structural connection or a mechanical connection; a direct connection or an indirect connection via an intermediate medium; or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] It should be noted that these and subsequent accompanying drawings are merely illustrative and are not drawn to scale, and should not be construed as limiting the scope of protection of this utility model. Furthermore, variations in different embodiments can be appropriately combined. The components of the embodiments described and marked in the accompanying drawings can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0023] The multi-layer composite food packaging film disclosed in this utility model is mainly used in packaging film applications.

[0024] Reference Figures 1 to 4 A multi-layer composite food packaging film includes: a packaging film body 1, wherein a protective layer 2, a barrier layer 3, an additive layer 4 and a contact layer 5 are respectively disposed inside the packaging film body 1, the protective layer 2 is disposed on top of the barrier layer 3, the barrier layer 3 is disposed on top of the additive layer 4, the additive layer 4 is disposed on top of the contact layer 5, and an adhesive 6 is disposed between each pair of the protective layer 2, the barrier layer 3, the additive layer 4 and the contact layer 5, and the interior of the protective layer 2 is composed of high-density polyethylene material 7;

[0025] The interior of the barrier layer 3 is made of polyester material 8;

[0026] The interior of the added layer 4 is composed of antibacterial agent 9;

[0027] The interior of the contact layer 5 is made of food-grade resin material 10.

[0028] In the above technical solution, considering that existing food packaging film materials use biaxially oriented polypropylene, aluminum foil, and polyethylene, but due to the low mechanical strength of aluminum foil, it is easily torn and broken, and its barrier performance is affected by the number and size of pinholes. During production and use, aluminum foil breakage frequently occurs, leading to food spoilage and affecting food quality and shelf life. To solve this problem, the specific operation is as follows: A protective layer 2, a barrier layer 3, an additive layer 4, and a contact layer 5 are set inside the main body 1 of the packaging film. Water-based adhesive 6 is used to bond the layers together. The interior of the protective layer 2 is composed of high-density polyethylene material 7. The high-density polyethylene material 7 provides physical protection, resists water penetration, resists external environmental influences, and enhances the tear resistance and mechanical strength of the film. The barrier layer 3 is composed of polyester material 8, which effectively blocks gases (such as oxygen and carbon dioxide) and moisture, extending the shelf life of food and maintaining its freshness and taste. The additive layer 4 is composed of antibacterial agent 9. Adding antibacterial agent 9 to the packaging film further inhibits the growth of microorganisms and ensures food safety. The contact layer 5 is composed of food-grade resin material 10. The contact layer 5, which uses food-grade resin material 10, comes into direct contact with food, ensuring safety and non-migration, and providing good sealing performance.

[0029] Reference Figures 1 to 4 In a preferred embodiment, the thicknesses of the protective layer 2, the barrier layer 3, the additive layer 4, and the contact layer 5 are equal.

[0030] Working principle: In use, a protective layer 2, a barrier layer 3, an additive layer 4, and a contact layer 5 are provided inside the main body 1 of the packaging film. Water-based adhesive 6 is used to bond the layers together. The protective layer 2 is composed of high-density polyethylene material 7, which provides physical protection, resists water penetration, resists external environmental influences, and enhances the film's tear resistance and mechanical strength. The barrier layer 3 is composed of polyester material 8, which effectively blocks gases (such as oxygen and carbon dioxide) and moisture, extending the shelf life of food and maintaining its freshness and taste. The additive layer 4 is composed of antibacterial agent 9, which further inhibits the growth of microorganisms and ensures food safety. The contact layer 5 is composed of food-grade resin material 10, which directly contacts the food, ensuring safety and non-migration, and providing good sealing. Any content not described in detail in this specification is prior art known to those skilled in the art.

[0031] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A multilayer composite food packaging film, comprising a packaging film body (1), characterized in that, The packaging film body (1) is provided with a protective layer (2), a barrier layer (3), an additive layer (4) and a contact layer (5) respectively. The protective layer (2) is located on top of the barrier layer (3), the barrier layer (3) is located on top of the additive layer (4), the additive layer (4) is located on top of the contact layer (5), and an adhesive (6) is provided between each pair of the protective layer (2), the barrier layer (3), the additive layer (4) and the contact layer (5). The interior of the protective layer (2) is made of high-density polyethylene material (7).

2. The multilayer composite food packaging film according to claim 1, characterized in that, The interior of the barrier layer (3) is made of polyester material (8).

3. The multilayer composite food packaging film according to claim 1, characterized in that, The interior of the added layer (4) is composed of an antibacterial agent (9).

4. The multilayer composite food packaging film according to claim 1, characterized in that, The interior of the contact layer (5) is made of food-grade resin material (10).

5. The multilayer composite food packaging film according to claim 1, characterized in that, The thicknesses of the protective layer (2), barrier layer (3), additive layer (4), and contact layer (5) are equal.

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