A type of food preservation film structure

Abstract

This utility model discloses a plastic wrap structure, relating to the field of plastic wrap. The key technical points are: it includes a film body comprising an inner layer and an outer layer; a raised portion is provided on the outer layer, with an adhesive area at one end of the raised portion; the outer layer consists of a middle layer and a surface layer, with a cavity between the middle layer and the surface layer; the film body has two easy-tear lines (first and second); the middle layer and the inner layer share perforations; and tear grooves are provided on both sides of the raised portion. By providing the easy-tear lines and the raised portion, users can switch between different types of plastic wrap according to their specific needs, thus improving the versatility of the film body. This allows the plastic wrap to be used for both food preservation and microwave heating. The dense PVDC molecular structure and strong intermolecular forces effectively block oxygen penetration, ensuring the preservation effect of the plastic wrap.

Description

Technical Field

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

[0002] Plastic wrap is a common household plastic film, mainly used to wrap and cover food to extend its shelf life.

[0003] When heating food in a microwave oven, it is necessary to cover the food with plastic wrap. Its main function is to reduce the evaporation of moisture from the food, prevent the food from drying out, and at the same time, it can lock in hot steam to a certain extent, help the heat be evenly distributed, and prevent the food from overheating or splattering in certain areas. During use, small holes need to be poked in the plastic wrap to allow steam to escape and prevent the plastic wrap from bursting. However, the process of poking small holes requires appropriate tools. If the holes are too large, the moisture will evaporate too quickly, which is not conducive to operation.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a food preservation film structure.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a food preservation film structure, comprising a film body, the film body comprising an inner layer and an outer layer, the outer layer having a raised portion, one end of the raised portion having an adhesive area for fixing the inner layer, the outer layer being composed of a middle layer and a surface layer, a cavity being provided between the middle layer and the surface layer, the film body having a plurality of mutually parallel easy-tear lines one and two, the adhesive area being located between easy-tear lines one and two and the easy-tear lines two passing through the raised portion, the middle layer and the inner layer having a common through hole communicating with the cavity, tear grooves being provided on both sides of the raised portion, and the cavity extending to the space between the two tear grooves.

[0007] The present invention is further configured such that: an embossing groove is provided on the side of the outer layer facing away from the inner layer, and an easy-tear line is provided in the embossing groove.

[0008] The present invention is further configured such that: both the first and second easy-tear lines are composed of several through grooves, the difference being that the through grooves located at both ends of the first easy-tear line are respectively connected to both sides of the film body.

[0009] The present invention is further configured such that the side of the raised portion facing the inner layer is coated with an organosilicon coating.

[0010] The present invention is further configured such that the melting points of the intermediate layer and the inner layer are both lower than the melting point of the surface layer.

[0011] The present invention is further configured such that: the material of the surface layer is PVDC, and the materials of the intermediate layer and the inner layer are both PE.

[0012] In summary, this utility model has the following beneficial effects: In its normal state, one end of the flip-up section is bonded to the inner layer via an adhesive area, preventing the inner and outer layers from separating. The film can be used for food preservation by tearing it off along the first tear line. When the film needs to be used for microwave heating, it is torn off along the second tear line, which passes through the flip-up section, allowing it to flip up. The inner layer then covers the rim of the bowl. One end of the flip-up section is then torn open through the tear groove, connecting the cavity to the outside. Gas inside the bowl can then enter the cavity through the perforation. Releasing the gas prevents the film from bursting. This design allows the film to adapt to both usage scenarios, improving its versatility. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a cross-sectional view of the present invention; Figure 3 for Figure 2 Enlarged view of section A; Figure 4 This is a schematic diagram of the structure of the present invention. Figure 2 This is used to show the state where one end of the flipped-up part has been torn off.

[0014] In the diagram: 1. Inner layer; 2. Fold-up section; 3. Middle layer; 4. Surface layer; 5. Cavity; 6. Easy-tear line one; 7. Easy-tear line two; 8. Through hole; 9. Tear groove; 10. Imprint groove. Detailed Implementation

[0015] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0016] A type of food preservation film structure, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the film includes a main body, which comprises an inner layer 1 and an outer layer. A raised portion 2 is provided on the outer layer, and one end of the raised portion 2 has an adhesive area for fixing the inner layer 1. The outer layer consists of an intermediate layer 3 and a surface layer 4, wherein the intermediate layer 3 is sandwiched between the surface layer 4 and the inner layer 1. A cavity 5 is provided between the intermediate layer 3 and the surface layer 4. Several parallel easy-tear lines 6 and 7 are provided on the main body, alternating between them. The adhesive area is located between the easy-tear lines 6 and 7, with the easy-tear line 7 passing through the raised portion 2. A through-hole 8 communicating with the cavity 5 is provided on both the intermediate layer 3 and the inner layer 1. Tear grooves 9 are provided on both sides of the raised portion 2, and the cavity 5 extends between the two tear grooves 9. In its normal state, the raised portion 2... One end of the lifting part 2 is bonded to the inner layer 1 through the adhesive area, so that the inner layer 1 and the outer layer will not separate. After the film body is torn off along the easy-tear line 6, it can be used for food preservation. When the film body needs to be used for microwave food heating, the film body is torn off along the easy-tear line 7. Since the easy-tear line 7 passes through the lifting part 2, the lifting part 2 can be lifted up. At this time, the inner layer 1 is used to cover the edge of the bowl. One end of the lifting part 2 is torn open by hand through the tear groove 9, so that the cavity 5 is connected to the outside. At this time, the gas in the bowl can enter the cavity 5 through the through hole 8. By releasing the gas in the bowl, the film body can be prevented from bursting. Through the above settings, the film body can be adapted to two usage scenarios, thereby improving the versatility of the film body.

[0017] like Figure 1 and Figure 2As shown, an embossed groove 10 is provided on the side of the outer layer facing away from the inner layer 1. Easy-tear line 6 is located within the embossed groove 10. By providing the embossed groove 10, the location of easy-tear line 6 becomes denser, making it easier to tear. Both easy-tear line 6 and easy-tear line 7 are composed of several through grooves. The difference is that the through grooves at both ends of easy-tear line 6 are connected to both sides of the film body. Since cling film is typically used for food preservation, designing easy-tear line 6 to be easier to tear better meets people's needs. When people need to tear the film body along easy-tear line 7, they hold the film on both sides of easy-tear line 7 with both hands to tear off the corresponding piece of cling film. The side of the flipped-up part 2 facing the inner layer 1 is coated with an organosilicon coating. By coating with an organosilicon coating, the adhesion between the flipped-up part 2 and the inner layer 1 can be reduced, thus facilitating the flipping up of the flipped-up part 2. The melting points of the intermediate layer 3 and the inner layer 1 are both lower than the melting point of the surface layer 4. The material of the surface layer 4 is PVDC, and the materials of the intermediate layer 3 and the inner layer 1 are both PE. The melting point of PVDC is around 180 degrees, while the melting point of PE is around 110 degrees. When making this film, the surface layer 4 and the intermediate layer 3 are first laminated together to form the outer layer, so that a cavity 5 is formed between the surface layer 4 and the intermediate layer 3, and the flipped-up part 2 is cut. Then, after the outer layer and the inner layer 1 are laminated together, a laser with a temperature between 120-140 degrees is used to drill holes, thereby forming a through-hole structure 8. Because the laser temperature does not reach the melting point of the surface layer 4, it can penetrate the intermediate layer 3 and the inner layer 1.

[0018] 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 cling film structure, characterized by: The film body includes an inner layer (1) and an outer layer. A raised part (2) is provided on the outer layer. One end of the raised part (2) is provided with an adhesive area for fixing the inner layer (1). The outer layer is composed of an intermediate layer (3) and a surface layer (4). A cavity (5) is provided between the intermediate layer (3) and the surface layer (4). A number of mutually parallel easy-tear lines one (6) and easy-tear lines two (7) are provided on the film body. The adhesive area is located between easy-tear lines one (6) and easy-tear lines two (7) and the easy-tear lines two (7) pass through the raised part (2). The intermediate layer (3) and the inner layer (1) are provided with through holes (8) that communicate with the cavity (5). Tear grooves (9) are provided on both sides of the raised part (2). The cavity (5) extends to the space between the two tear grooves (9).

2. A cling film structure according to claim 1, characterised in that: The outer layer has an embossing groove (10) on the side facing away from the inner layer (1), and the easy-tear line (6) is set in the embossing groove (10).

3. A cling film structure according to claim 2, characterised in that: Both the first tear line (6) and the second tear line (7) are composed of several through grooves. The difference is that the through grooves located at both ends of the first tear line (6) are connected to both sides of the film body.

4. The preservative film structure of claim 1, wherein: The flipped-up part (2) is coated with an organosilicon coating on the side facing the inner layer (1).

5. The preservative film structure of claim 1, wherein: The melting points of the intermediate layer (3) and the inner layer (1) are both lower than the melting point of the surface layer (4).

6. A cling film structure according to claim 5, characterised in that: The material of the surface layer (4) is PVDC, and the materials of the intermediate layer (3) and the inner layer (1) are both PE.

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