Food preservative film

Abstract

The utility model discloses a food preservative film relates to the field of film, and its technical scheme main points are: including base body, be equipped with a plurality of fresh -keeping piece on the base body, and the fresh -keeping piece includes inner membrane and outer membrane, is equipped with the central hole on the outer membrane, is equipped with a plurality of small holes on the inner membrane, and the cavity is formed between the inner membrane and the outer membrane, and the upper and lower sides of fresh -keeping piece are all formed with ring groove by printing pressure. When the fresh -keeping piece is used for covering on daily food, the part of inner membrane and outer membrane in the position of ring groove is printed and pressed tightly, so that external air is not easy to pass through the fresh -keeping piece, when the fresh -keeping piece is used for the food of microwave heating, people insert the central hole with finger and exert force to inner membrane, make the inner membrane and outer membrane in the position of ring groove separate, at this time, the steam in food can pass through small hole and then discharge through the central hole after entering the cavity, prevent the situation that the fresh -keeping piece is broken, and the setting of PU coating increases the tensile strength of inner membrane center.

Description

Technical Field

[0001] This utility model relates to the field of films, and more specifically, to a food preservation film. Background Technology

[0002] Food preservation film is a thin plastic film used to wrap and cover food. Its main functions are to isolate air, prevent moisture loss, extend the shelf life of food, and reduce bacterial contamination.

[0003] Plastic wrap is usually rolled up. People pull out the roll of plastic wrap, tear it along the tear line, and cover the food with it. The edges of the plastic wrap are attached to the edge of the bowl or plate to reduce the evaporation of moisture from the food.

[0004] Plastic wrap can be used not only for storing food but also for heating food in the microwave. When heating food in the microwave, the moisture evaporates quickly, causing it to dry out and harden. Plastic wrap can prevent moisture loss and keep food moist. It can also lock in steam to some extent, using heat conduction to distribute heat more evenly. However, to prevent the plastic wrap from bursting due to steam, small holes need to be poked in it before microwaving. This requires finding a tool to poke holes before each use, which is inconvenient.

[0005] Therefore, a new solution is needed to address this problem. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a food preservation film.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a food preservation film, comprising a substrate, wherein the substrate is provided with a plurality of dividing lines, the dividing lines dividing the substrate into a plurality of preservation blocks, each preservation block comprising an inner film and an outer film, wherein the outer film is provided with a central hole, and the inner film is provided with a plurality of small holes, the plurality of small holes being arranged in a ring array around the central hole, a cavity being formed between the inner film and the outer film, the central hole and the small holes being connected to the cavity, and annular grooves being imprinted on the upper and lower sides of the preservation block, the annular grooves separating the central hole from all the small holes.

[0008] The present invention is further configured such that: an anti-tensile layer is provided on the inner membrane, the anti-tensile layer is circular and located at the center of the preservation block, and the annular groove is located at the edge of the anti-tensile layer.

[0009] The present invention is further configured such that the tensile layer is located on the side of the inner membrane facing the outer membrane.

[0010] The present invention is further configured such that the tensile layer is a PU coating.

[0011] The present invention is further configured such that a plurality of protrusions are formed on the tensile layer.

[0012] The present invention is further configured such that the diameter of the central hole is 8-10 mm.

[0013] In summary, this utility model has the following beneficial effects:

[0014] When the preservation block is used to cover everyday food, the inner and outer membranes located in the annular groove are pressed tightly together, making it difficult for external air to pass through the preservation block and ensuring its preservation ability.

[0015] When using the food preservation block on microwave-heated food, people insert their fingers into the central hole and apply force to the inner membrane, causing the inner membrane to deform inward. During this process, the inner and outer membranes located in the annular groove separate. At this time, the steam in the food can enter the cavity through the small hole and then exit through the central hole, preventing the food preservation block from being torn apart. This design eliminates the need for people to use tools to poke holes, making the operation more convenient. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0018] Figure 3 This is a cross-sectional view of the present invention.

[0019] In the diagram: 1. Dividing line; 2. Inner membrane; 3. Outer membrane; 4. Central hole; 5. Small hole; 6. Annular groove; 7. Tensile layer. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] Food preservation film, such as Figure 1 , Figure 2 and Figure 3As shown, the device includes a substrate with several dividing lines 1 that divide the substrate into several preservation blocks. After peeling the preservation blocks off the substrate along the dividing lines, they are used to wrap food. Each preservation block includes an inner membrane 2 and an outer membrane 3. The outer membrane 3 has a central hole 4, and the inner membrane 2 has several small holes 5 arranged in a ring around the central hole 4. A cavity is formed between the inner membrane 2 and the outer membrane 3, and the central hole 4 and the small holes 5 communicate with the cavity. Ring grooves 6 are imprinted on both the top and bottom sides of the preservation block, separating the central hole 4 from all the small holes 5. When the preservation block is used to wrap everyday food, the portions of the inner membrane 2 and outer membrane 3 located at the ring grooves 6 are pressed tightly together, making it difficult for external air to pass through, thus ensuring the preservation block's freshness retention. The preservation block is also used for microwave-heated food. When placing the food, people cover it with the preservation block, ensuring the inner membrane 2 is inside the block. After securing the block, they insert their fingers into the central hole 4 and apply pressure to the inner membrane 2, causing it to deform inward. During this process, the inner membrane 2 and outer membrane 3, located at the annular groove 6, separate, thus connecting the cavity. Steam from the food can then enter the cavity through the small hole 5 and exit through the central hole 4, preventing the preservation block from bursting. This design eliminates the need for tools to poke holes, simplifying the process. The central hole 4 has a diameter of 8-10 mm, which is relatively large, facilitating pressure on the inner membrane 2. Even if the pressure doesn't completely separate the inner membrane 2 and outer membrane 3 at the annular groove 6, the steam will eventually separate them as the cavity fills.

[0022] like Figure 3 As shown, the inner membrane 2 is provided with an anti-stretch layer 7, which is circular and located at the center of the preservation block. The annular groove 6 is located at the edge of the anti-stretch layer 7. The anti-stretch layer 7 weakens the ability of the center of the inner membrane 2 to undergo tensile deformation and increases the strength of the center of the inner membrane 2. When people press with their fingers, the force applied by the fingers can separate the inner membrane 2 and the outer membrane 3 at the annular groove 6 as much as possible, reducing the impact of the deformation and stretching of the inner membrane 2 on the separation process. The anti-stretch layer 7 is located on the side of the inner membrane 2 facing the outer membrane 3. This arrangement prevents the anti-stretch layer 7 from being directly pressed. The anti-stretch layer 7 is a PU coating. The PU coating can improve the mechanical strength of the inner membrane 2 and reduce the deformation caused by stretching. Several protrusions are formed on the anti-stretch layer 7. The protrusions allow the inner membrane 2 and the outer membrane 3 to be pressed together more firmly when the preservation block is pressed. During the stretching process of the preservation block, it is not easy to separate. The protrusions are formed on the PU coating by adding silica particles.

[0023] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A food preservation film, comprising a substrate, wherein the substrate is provided with a plurality of dividing lines (1), the dividing lines (1) dividing the substrate into a plurality of preservation blocks, characterized in that: The preservation block includes an inner membrane (2) and an outer membrane (3). The outer membrane (3) has a central hole (4), and the inner membrane (2) has a plurality of small holes (5). The plurality of small holes (5) are arranged in a ring array with the central hole (4) as the center. A cavity is formed between the inner membrane (2) and the outer membrane (3). The central hole (4) and the small holes (5) are all connected to the cavity. The upper and lower sides of the preservation block are printed with ring grooves (6), which separate the central hole (4) from all the small holes (5).

2. The food preservation film according to claim 1, characterized in that: The inner membrane (2) is provided with a tensile layer (7), which is circular and located at the center of the preservation block. The annular groove (6) is located at the edge of the tensile layer (7).

3. The food preservation film according to claim 2, characterized in that: The tensile layer (7) is located on the side of the inner membrane (2) facing the outer membrane (3).

4. The food preservation film according to claim 2, characterized in that: The tensile layer (7) is a PU coating.

5. The food preservation film according to claim 4, characterized in that: Several protrusions are formed on the tensile layer (7).

6. The food preservation film according to claim 1, characterized in that: The diameter of the central hole (4) is 8-10 mm.

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