A plastic film
By introducing buffer cavities, through holes, and PU coating design into the plastic film, the problem of easy tearing during stretching of the cling film is solved, achieving a tight fit with the bowl rim and tensile stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG HAIBIN FILM TECH CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-07-31
AI Technical Summary
Plastic wrap is easily torn during stretching, resulting in a poor fit to the rim of the bowl, and it is also prone to tearing when stretched excessively.
Design a plastic film comprising a stretch layer and a structural layer, with a buffer cavity between the stretch layer and the structural layer. The thickness of the stretch layer is less than that of the structural layer. The structural layer has through holes and a PU coating. The PU coating has protrusions at the edges to increase friction and prevent overstretching.
It effectively prevents the stretch layer from tearing, ensures that the diaphragm fits tightly against the bowl, reduces tensile damage, and improves stability and strength during use.
Smart Images
Figure CN224577146U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of films, and more specifically, to a plastic film. Background Technology
[0002] Plastic film is a thin and flexible sheet product made of plastic material. It has certain applications in our daily lives. The cling film we use every day is made of plastic film.
[0003] People wrap plastic wrap around the rim of a bowl. Plastic wrap can block oxygen from contacting food, slow down the oxidation of fats and the loss of vitamins in food. To ensure that the plastic wrap adheres tightly to the rim of the bowl, people first cover the rim with plastic wrap, and then stretch the plastic wrap. This stretching increases the tension of the plastic wrap, making it fit tightly to the curve of the rim of the bowl and reducing the gap between it and the rim. However, if the plastic wrap is stretched too much during this process, it may break.
[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 plastic film.
[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a plastic film, including a film body, wherein the film body is provided with a plurality of dividing lines, the dividing lines dividing the film body into film sheets of the same size, the film sheets including a stretching layer and a structural layer, the stretching layer including a central part, a stretching part and an edge part, the stretching part being located between the central part and the edge part, the central part and the edge part being fixedly connected to the structural layer, and a buffer cavity being formed between the stretching part and the structural layer.
[0007] The present invention is further configured such that the thickness of the stretching layer is less than the thickness of the structural layer.
[0008] The present invention is further configured such that: a plurality of through holes are provided on the structural layer above the stretching portion.
[0009] The present invention is further configured such that: the stretching layer and the structural layer are coated with a PU coating on the opposite sides of each other, and the PU coating is located at the edge of the film.
[0010] The present invention is further configured such that the projection of the through hole on the stretching part is close to the edge of the stretching part and the through hole is opened at the position where the structural layer is coated with PU coating.
[0011] The present invention is further configured such that the PU coating surface has several protrusions.
[0012] In summary, this utility model has the following beneficial effects:
[0013] When people use the membrane to cover the rim of a bowl, they align the stretch layer with the rim, with the center of the stretch layer inside the rim. They hold the edge of the stretch layer and pull it downwards. At this time, the stretch layer will undergo stretching deformation under the action of the edge of the rim, thus getting closer to the rim. During this process, the buffer cavity between the stretch layer and the structural layer will gradually decrease. If people accidentally stretch it too much, the buffer cavity will disappear directly, and the stretch layer will be directly attached to the structural layer. The structural layer can limit the stretching deformation of the stretch layer, thus preventing the stretch layer from tearing. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model;
[0015] Figure 2 for Figure 1 Enlarged view of section A;
[0016] Figure 3 This is a cross-sectional view of the present invention.
[0017] In the diagram: 1. Stretch layer; 2. Structural layer; 3. Center section; 4. Stretch section; 5. Edge section; 6. Buffer cavity; 7. Through hole; 8. PU coating. Detailed Implementation
[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0019] A type of plastic film, such as Figure 1 , Figure 2 and Figure 3As shown, the device includes a film body with several dividing lines that divide the film body into membranes of the same size. Each membrane includes a stretching layer 1 and a structural layer 2. The stretching layer 1 includes a central portion 3, a stretching portion 4, and an edge portion 5. The central portion 3 is rectangular, and the edge portion 5 is rectangular. The stretching portion 4 is located between the central portion 3 and the edge portion 5. Both the central portion 3 and the edge portion 5 are fixedly connected to the structural layer 2. A buffer cavity 6 is formed between the stretching portion 4 and the structural layer 2. When people use the membrane to cover the rim of a bowl, they align the stretching layer 1 with the rim of the bowl, with the central portion 3 in the rim. They hold the edge portion 5 and pull it downwards. At this time, the stretching portion 4 will undergo stretching deformation under the action of the rim of the bowl, thus getting closer to the rim. During this process, the buffer cavity 6 between the stretching portion 4 and the structural layer 2 will gradually decrease. If people accidentally stretch it too much, the buffer cavity 6 will disappear directly, and the stretching portion 4 will be directly attached to the structural layer 2. The structural layer 2 can limit the stretching deformation of the stretching portion 4, thereby preventing the stretching portion 4 from tearing.
[0020] like Figure 1 , Figure 2 and Figure 3 As shown, the thickness of the stretching layer 1 is less than the thickness of the structural layer 2. The thinner stretching layer 1 makes it easier to stretch, while the thicker structural layer 2 restricts the stretching of the stretching layer 1. The structural layer 2 has several through holes 7 located above the stretching section 4. These through holes 7 allow air in the buffer cavity 6 to escape, making the stretching of the stretching section 4 smoother. Both the stretching layer 1 and the structural layer 2 are coated with a PU coating 8 on opposite sides. The PU coating 8 is located at the edge of the membrane, increasing the strength of the membrane edge because it is where people hold the membrane. The edge portion is set at 5 points to prevent the membrane from being stretched and damaged at the edge. Several protrusions are formed on the surface of the PU coating 8. The protrusions increase the friction between the hand and the PU coating 8. By mixing silica particles into the PU coating 8, the surface texture of the PU coating 8 is increased. The projection of the through hole 7 on the stretching portion 4 is set close to the edge of the stretching portion 4 and the through hole 7 is opened at the position where the structural layer 2 is coated with the PU coating 8. The position where the through hole 7 is opened in the stretching portion 4 is covered by the PU coating 8, thereby ensuring the structural strength of the structural layer 2 at this position and compensating for the impact of the through hole 7 on the strength of this part.
[0021] 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 plastic film, comprising a film body, wherein the film body is provided with a plurality of dividing lines, the dividing lines dividing the film body into film sheets of the same size, characterized in that: The diaphragm includes a stretching layer (1) and a structural layer (2). The stretching layer (1) includes a central part (3), a stretching part (4) and an edge part (5). The stretching part (4) is located between the central part (3) and the edge part (5). The central part (3) and the edge part (5) are both fixedly connected to the structural layer (2). A buffer cavity (6) is formed between the stretching part (4) and the structural layer (2).
2. A plastic film according to claim 1, characterised in that: The thickness of the stretch layer (1) is less than the thickness of the structural layer (2).
3. A plastic film according to claim 1, characterized in that: The structural layer (2) has several through holes (7) located above the stretching part (4).
4. A plastic film according to claim 3, characterised in that: The stretching layer (1) and the structural layer (2) are coated with a PU coating (8) on opposite sides of each other, and the PU coating (8) is located at the edge of the film.
5. A plastic film according to claim 4, characterised in that: The projection of the through hole (7) on the stretching part (4) is set close to the edge of the stretching part (4), and the through hole (7) is opened at the position where the PU coating (8) is applied to the structural layer (2).
6. A plastic film according to claim 4, wherein: The surface of the PU coating (8) has several protrusions.