Moistureproof food composite packaging film

Abstract

The utility model relates to the technical field of food packaging films, and discloses a damp-proof food composite packaging film which comprises an outer film body, an inner film layer is fixedly attached to the bottom face of the outer film body, the outer film body comprises an outer film layer, separation seams are formed in the two ends of the outer film layer, the top face of one end of the outer film layer is connected with a release strip, and the top face of the other end of the outer film layer is connected with an inner film layer. One side of the release strip is connected with a rolling section, indication belts are attached to the top faces of the two sides of the outer film layer, and a waterproof layer is attached to the inner wall of the outer film layer. The waterproof layer made of the polyethylene composite material and the separation layer made of the vinyl alcohol copolymer material are added between the mold bodies to form a film layer waterproof structure of the whole composite film, the effective waterproof and anti-permeation effects are achieved, meanwhile, when the film is used for packaging food, attaching adsorption after the film is rolled up can be enhanced through the inner concave holes, and therefore the food packaging effect is improved. Therefore, film gaps between packages are reduced, water stain permeation is avoided, the release strip connected to one side is matched, after the packages are attached, the film can be torn off quickly, and use is convenient.

Description

Technical Field

[0001] This utility model relates to the field of food packaging film technology, specifically a moisture-proof food composite packaging film. Background Technology

[0002] Moisture-proof food composite packaging film is a packaging material made through multi-layer material composite technology. It is mainly used to block moisture penetration and extend the shelf life of food. This type of food packaging film is mainly used to wrap the surface of food to isolate the entry of microorganisms, bacteria and foreign contaminants, and prevent and prolong the spoilage of food. Food packaging films mainly include photocatalytic inorganic antibacterial agent films, natural and polymeric antibacterial agent films, composite antibacterial agent films, inorganic antibacterial agent films and organic antibacterial agent films.

[0003] Existing technologies, such as the patent with publication number CN219856337U, disclose a food packaging composite film, including a base layer, a corrosion-resistant coating on the upper surface of the base layer, the corrosion-resistant coating being a polytetrafluoroethylene layer, an inner layer on the lower surface of the base layer, and a number of protrusions between the base layer and the inner layer, the protrusions being hemispherical and made of resin material, and protrusions forming on the surface of the inner layer corresponding to the protrusion positions, with gaps forming between adjacent protrusions.

[0004] While the aforementioned existing technologies have significant beneficial effects, they still have shortcomings:

[0005] The aforementioned composite packaging film has good corrosion resistance due to the corrosion-resistant coating. The inner surface has raised sections with gaps between adjacent sections, allowing for easy lifting of the outermost end of the film. However, the presence of raised sections throughout the inner layer results in gaps between the film and the food during packaging, leading to insufficient moisture protection. Moisture or water stains can easily seep in through these gaps, causing the food to become damp and moldy inside the packaging, affecting food quality and safety. Therefore, a moisture-proof food composite packaging film is proposed. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a moisture-proof food composite packaging film. By adding a waterproof layer of polyethylene composite material and a separator layer of ethylene alcohol copolymer material between the mold bodies, an integral composite film waterproof structure is formed. The film is then combined and integrated using heat sealing technology. In addition, the concave holes help to adhere and absorb during film packaging, reducing packaging gaps and achieving effective waterproof and anti-permeability effects.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a moisture-proof food composite packaging film, comprising an outer film body, an inner film layer fixedly adhered to the bottom surface of the outer film body, the outer film body including the outer film layer, the two ends of the outer film layer having separation slits, a release strip connected to the top surface of one end of the outer film layer, a winding section connected to one side of the release strip, indicator strips attached to the top surfaces of both sides of the outer film layer, a waterproof layer attached to the inner wall of the outer film layer, a separation layer attached to the bottom surface of the waterproof layer, and arc-shaped ends provided at both ends of the separation layer.

[0008] Preferably, one side of the release strip is fixedly connected to one end of the outer film layer, and the outer film layer is made of polypropylene.

[0009] Preferably, the waterproof layer adhered to the bottom surface of the outer membrane layer is made of polyethylene composite material, and both ends of the outer membrane layer, the waterproof layer, and the separator layer are uniformly adhered to the top surface and both ends of the inner membrane layer through arc-shaped ends.

[0010] Preferably, the separator layer is made of ethylene alcohol copolymer, and the bottom surface of the separator layer is attached to the top surface of the inner membrane layer.

[0011] Preferably, the inner membrane layer includes an adhesive layer, the bottom end of which is attached to a bottom membrane layer, nylon filaments are threaded through the interior of the bottom membrane layer, a concave hole is formed on the bottom surface of the bottom membrane layer, adhesive strips are embedded at both ends of the bottom membrane layer, and a mesh belt is attached to the bottom surface of the adhesive strips.

[0012] Preferably, the nylon filaments are equidistantly threaded along the interior of the base film layer, and the base film layer and the adhesive layer are heat-sealed together.

[0013] Preferably, the adhesive strip and the mesh belt are evenly attached to the bottom surfaces at both ends of the bottom film layer, and the mesh belt is woven into a mesh shape.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention creates a waterproof membrane structure by adding a waterproof layer of polyethylene composite material and a separator layer of ethylene alcohol copolymer material between the mold bodies to form an integral composite membrane, achieving effective waterproofing and anti-permeability. At the same time, when packaging food with this membrane, the concave holes can enhance the adhesion and adsorption of the rolled-up membrane, thereby reducing the gap between the packages and preventing water stains from seeping in. With the release strip connected on one side, the membrane can be quickly torn open after the packaging is attached, making it convenient to use.

[0016] The outer layer of this composite packaging film is made of polypropylene, which has strong tensile and tear resistance and can resist external impacts and compression. It can maintain the stability of the film structure when the packaged food is in a stable state. The inner composite waterproof layer and separator layer are made of polyethylene composite material, which can isolate moisture and humidity, prevent leakage of internal substances, maintain stable sealing performance after packaging, and provide stable protection for packaged food.

[0017] The bottom layer of this composite packaging film is fixed to the bottom surface of the outer film through an adhesive layer to form an integral whole, maintaining the structural stability of the entire composite film under packaging use. At the same time, the nylon filaments that are equidistantly inserted inside the bottom layer can maintain the stability of the internal structure of the overall film during packaging use, providing effective protection against external forces such as tension, and further improving the protective performance of the packaging.

[0018] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the outer membrane of this utility model;

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the outer membrane of this utility model;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the inner membrane layer of this utility model;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the adhesive strip in the inner membrane layer of this utility model.

[0023] In the diagram: 1. Outer membrane; 101. Equipment frame; 102. Separation seam; 103. Release strip; 104. Rewinding section; 105. Indicator strip; 106. Waterproof layer; 107. Separation layer; 108. Arc-shaped end; 2. Inner membrane layer; 201. Adhesive layer; 202. Bottom membrane layer; 203. Nylon filament; 204. Recessed hole; 205. Adhesive strip; 206. Mesh belt. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4This embodiment of a moisture-proof food composite packaging film includes an outer film body 1, an inner film layer 2 fixedly attached to the bottom surface of the outer film body 1, the outer film body 1 includes an outer film layer 101, the two ends of the outer film layer 101 are provided with separation slits 102, a release strip 103 is connected to the top surface of one end of the outer film layer 101, a winding section 104 is connected to one side of the release strip 103, indicator strips 105 are attached to the top surfaces of both sides of the outer film layer 101, a waterproof layer 106 is attached to the inner wall of the outer film layer 101, a separation layer 107 is attached to the bottom surface of the waterproof layer 106, and arc-shaped ends 108 are provided at both ends of the separation layer 107.

[0026] like Figure 1-4 As shown, the composite packaging film of this utility model is similar in structure to existing composite packaging films, such as the food packaging composite film with publication number CN219856337U. The main improvement of this utility model is that by adding a waterproof layer 106 of polyethylene composite material and a separator layer 107 of ethylene alcohol copolymer material between the mold bodies to form an integral waterproof structure of the composite film, it is superimposed and combined with heat sealing technology to form an integral unit. With the help of the concave holes 204, it adheres and absorbs during film packaging to reduce packaging gaps, thereby achieving effective waterproof and anti-permeability effects. In this utility model, the waterproof layer 106 and the separator layer 107 are both existing technologies. When using this composite packaging film, the user can directly tear the outer film layer 101 of the film through the separator seam 102 formed by cutting at both ends, and separate the unconnected outer film layer 101. One end of the release strip 103 is attached to the food to be packaged, and then the entire packaging film is rolled up and laminated until the entire film layer covers the food, completing the packaging. At this time, due to the silicone oil coating on the surface of the release strip 103, the film end can be prevented from sticking to the mold body after the packaging is rolled up. At the same time, after packaging, the user can directly pinch the release strip 103 to quickly tear the entire film, which is convenient and quick. Its outer film layer 101 is made of polypropylene, which has strong tensile and tear resistance and can resist external impact and compression. It can maintain the stability of the film structure in the state of packaged food. The inner composite waterproof layer 106 and the separator layer 107 are made of polyethylene composite material, which can isolate moisture and humidity, prevent internal substances from leaking, maintain stable sealing performance after packaging, and provide stable protection for packaged food.

[0027] like Figure 3-4As shown, the inner film layer 2 includes an adhesive layer 201, with a bottom film layer 202 attached to the bottom end of the adhesive layer 201. Nylon filaments 203 are threaded through the interior of the bottom film layer 202, and recessed holes 204 are formed on the bottom surface of the bottom film layer 202. Adhesive strips 205 are embedded at both ends of the bottom film layer 202, and a mesh belt 206 is attached to the bottom surface of the adhesive strips 205. While packaging food, the outer film layer 101, in the state of wrapping and rolling the food, can sequentially adhere to the film body after rolling up, following the equidistant recessed holes 204 on the bottom surface of the bottom film layer 202. Meanwhile, the inner film layer 101... The concave structure of the recessed hole 204 can form an adsorption fit after bonding, improving the bonding and sealing performance, thereby reducing the gap between the film packaging and further improving the seal to prevent water stains from entering. The bottom film layer 202 is fixed to the bottom surface of the outer film body 1 by the adhesive layer 201 through the bonding technology to form an integral whole, maintaining the structural stability of the overall composite film under packaging use. At the same time, the nylon filaments 203 that are equidistantly inserted inside the bottom film layer 202 can maintain the stability of the internal structure of the overall film during packaging use, providing effective protection under external forces such as tension, and further improving the protection of the packaging.

[0028] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A moisture-proof food composite packaging film comprising an outer film body (1), characterized in that, The bottom surface of the outer film body (1) is fixed with an inner film layer (2), the outer film body (1) comprises an outer film layer (101), the two ends of the outer film layer (101) are provided with a separation joint (102), one end of the outer film layer (101) is connected with a release strip (103), one side of the release strip (103) is connected with a winding section (104), the top surface of the two sides of the outer film layer (101) is attached with an indication band (105), the inner wall of the outer film layer (101) is attached with a waterproof layer (106), the bottom surface of the waterproof layer (106) is attached with a separation layer (107), and the two ends of the separation layer (107) are provided with arc-shaped ends (108).

2. The moisture-proof food composite packaging film according to claim 1, characterized in that, The side edge of the release strip (103) is fixedly connected with one end of the outer film layer (101), and the outer film layer (101) is made of polypropylene material.

3. The moisture resistant food composite packaging film according to claim 1, wherein The waterproof layer (106) attached to the bottom surface of the outer film layer (101) is made of polyethylene composite material, and the outer film layer (101), the waterproof layer (106) and the separation layer (107) are uniformly attached to the top surface and the two ends of the inner film layer (2) through the arc-shaped ends (108).

4. The moisture resistant food composite packaging film according to claim 1, wherein The separation layer (107) is made of ethylene-vinyl alcohol copolymer material, and the bottom surface of the separation layer (107) is attached to the top surface of the inner film layer (2).

5. The moisture resistant food composite packaging film according to claim 1, wherein The inner film layer (2) comprises an adhesive layer (201), the bottom end of the adhesive layer (201) is attached with a bottom film layer (202), the inside of the bottom film layer (202) is provided with a nylon wire (203), the bottom surface of the bottom film layer (202) is provided with an inner recess hole (204), and the two ends of the bottom film layer (202) are embedded with a rubber strip (205), and the bottom surface of the rubber strip (205) is attached with a mesh belt (206).

6. The moisture resistant food composite packaging film according to claim 5, wherein, The nylon wire (203) is equidistantly arranged inside the bottom film layer (202), and the bottom film layer (202) and the adhesive layer (201) are heat-sealed and fixed.

7. The moisture resistant food composite packaging film according to claim 5, wherein The rubber strip (205) and the mesh belt (206) are uniformly attached to the bottom surface of the two ends of the bottom film layer (202), and the mesh belt (206) is in a mesh weaving shape.

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