Preservative film with multi-layer structure and packaging box

Abstract

The preservative film with the multi-layer structure comprises a preservative film body, the two sides of the long edge of the preservative film body are provided with symmetrical sawtooth edges, the preservative film body is sequentially provided with seven layers from top to bottom, the first layer, the fourth layer and the seventh layer are linear tearing layers, and the fifth layer and the sixth layer are linear tearing layers. The third layer and the fifth layer are graphene antibacterial layers, the second layer and the sixth layer are barrier layers, and the three linear tearing layers are symmetrically distributed by taking the central surface in the thickness direction of the preservative film body as a symmetric surface; due to the design of the sawtooth edges on the two sides of the long edge of the preservative film body, the preservative film is like sawteeth on the edge of roll paper in daily use, and when the preservative film with a certain length needs to be cut, a user can easily tear the preservative film along the sawtooth edges. Therefore, the problem that the preservative film is difficult to tear under the condition that no tool exists or the preservative film is broken and untidy in the tearing process is solved, and the use convenience is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of preservative film, especially relates to a multi-layer structure's preservative film and packing box. BACKGROUND

[0002] The ordinary preservative film usually is with ethylene as the master batch through polymerization reaction and is prepared, the film is adhered on itself and food container to form relatively tight sealed space, through the protection food from air pollution, and prevent dry food from absorbing moisture and prevent wet food from losing moisture, thereby food keeps fresh, it can also seal smell to prevent smell from spreading to other food stored nearby, it is mainly used in microwave oven food heating, refrigerator food preservation, fresh food and cooked food packaging occasions, has wide application in the food packaging field of family life, supermarket, hotel and restaurant and industrial production.

[0003] But the ordinary ethylene preservative film is deficient in antibiosis, can not satisfy the quality, the fresh-keeping, the flavor multi -functional preservative film demand of keeping fresh, and the traditional preservative film packing box is opened, and its preservative film cutting device is exposed to the outside for a long time, is easily polluted by the dust, oil dirt etc. of outside, is easy to directly contaminate preservative film when cutting preservative film again.

[0004] Therefore, the application provides a multi-layer structure's preservative film and packing box, can effectively improve the antibacterial property of preservative film, and can avoid pollution in the cutting process. UTILITY MODEL CONTENT

[0005] The utility model provides a multi-layer structure's preservative film and packing box, aims at solving the problem of above -mentioned background art.

[0006] To solve the above technical problem, the utility model adopts the following technical scheme:

[0007] A multi-layer structure's preservative film, include: preservative film body, the long side both sides of preservative film body are the sawtooth edge of mutual symmetry and set up, the preservative film body is sequentially provided with seven layers from top to bottom, wherein one, four, seven layer is linear tear layer, three layer and five layer are graphene antibacterial layer, two layer and six layer are barrier layer, three layer linear tear layer is symmetrically distributed with the center surface in the thickness direction of preservative film body as the symmetry plane.

[0008] Further, the linear tear layer is made of polyethylene material.

[0009] Further, the graphene antibacterial layer is made of graphene-polyethylene composite material.

[0010] Further, the barrier layer is made of graphene-polyamide composite material.

[0011] Further, the application further provides a preservative film packaging box, comprising: the preservative film body, the packaging box body, the protective cover and the rotating shaft as described above;

[0012] The preservative film body is wound on the rotating shaft, the rotating shaft is rotationally connected in the inner cavity of the packaging box body, one side of the packaging box body is provided with an opening to form a film outlet, the protective cover is used for covering the film outlet, and the upper portion of the film outlet is provided with a cutter for cutting the preservative film body.

[0013] Further, the two ends of the rotating shaft extend to the outside of the packaging box body, and the adjusting nuts are respectively screw-connected.

[0014] Further, the upper side of the protective cover is provided with a first connecting part, and the lower side is provided with a second connecting part, the first connecting part and the second connecting part are fixedly connected with the packaging box body, a tearable strip is arranged between the second connecting part and the protective cover, and the left and right sides of the protective cover are connected with the packaging box body through tearable lines.

[0015] Further, the side, away from the inner cavity of the packaging box body, of the cutter is serrated, and the lower portion of the serrated part is inclinedly arranged, so that the thickness of the serrated part gradually increases from the side, away from the inner cavity of the packaging box body, to the side, close to the inner cavity of the packaging box body.

[0016] Compared with the prior art, the application has the following technical effects:

[0017] 1. The preservative film with a multi-layer structure is provided with serrated edges on the long sides of the preservative film body, so that when the preservative film needs to be cut to a certain length, the user can easily tear the preservative film along the serrated edges, which avoids the problem that the preservative film is difficult to tear without tools or the problem that the preservative film is broken irregularly during tearing, and greatly improves the convenience of use.

[0018] The three linear tearing layers are symmetrically distributed with the center plane in the thickness direction of the preservative film body as the symmetry plane, so that the preservative film can be torn along the preset direction, ensuring the straightness and regularity of tearing.

[0019] The two graphene antibacterial layers have good antibacterial performance, and can effectively inhibit the growth and reproduction of microorganisms such as bacteria and mold attached to the surface of the preservative film. When used for wrapping food, the risk of food being contaminated by microorganisms can be reduced, the preservation period of the food is prolonged, and the hygiene and safety of the food are ensured; unlike some chemical antibacterial agents, the antibacterial effect of graphene is mainly based on a physical mechanism, and no harmful substances are released into the food, meeting the requirements of people for food safety and health.

[0020] 2. The preservative film packaging box disclosed by the utility model is provided with a protective cover for covering the film outlet, so that foreign matters in the outside world cannot enter the packaging box when the preservative film is not used, and damage or pollution to the preservative film and the cutter is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a plan view of the preservative film with a multi-layer structure according to the utility model;

[0022] Figure 2 is a multi-layer structure view of the preservative film with a multi-layer structure according to the utility model;

[0023] Figure 3 is an axonometric view of the preservative film packaging box according to the utility model;

[0024] Figure 4 is an internal view of the preservative film packaging box according to the utility model;

[0025] Figure 5 is a sectional view of the preservative film packaging box according to the utility model;

[0026] Figure 6 is an opening view of the protective cover of the preservative film packaging box according to the utility model.

[0027] In the drawings:

[0028] 1, preservative film body; 101, sawtooth edge; 102, linear tear layer; 103, graphene antibacterial layer; 104, barrier layer;

[0029] 2, packaging box body; 201, film outlet;

[0030] 3, protective cover; 301, first connecting part; 302, second connecting part; 303, easy-to-tear pull strip;

[0031] 4, rotating shaft; 5, adjusting nut; 6, cutter. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to specific embodiments of this application and the accompanying drawings.

[0033] like Figures 1-2 As shown, a multi-layered plastic wrap includes: a plastic wrap body 1, wherein the long side of the plastic wrap body 1 is provided with symmetrical serrated edges 101, and the plastic wrap body 1 is provided with seven layers from top to bottom, wherein the first, fourth and seventh layers are linear tear layers 102, the third and fifth layers are graphene antibacterial layers 103, the second and sixth layers are barrier layers 104, and the three linear tear layers 102 are symmetrically distributed with the center surface of the plastic wrap body 1 in the thickness direction as the symmetrical surface.

[0034] The serrated edges on both sides of the long side of the cling film body 1 resemble the serrated edges of a roll of toilet paper, allowing users to easily tear the cling film along these edges when a certain length needs to be cut. This avoids the problems of difficulty tearing cling film without tools or uneven tears during the tearing process, greatly improving ease of use. The three linear tear layers 102 are symmetrically distributed with the central plane of the cling film body thickness as the symmetrical face, ensuring that the cling film tears along a preset direction, guaranteeing the straightness and neatness of the tear. Users can more easily control the tearing path during operation, avoiding irregular tears and thus more accurately obtaining the desired size of cling film. Graphene has excellent antibacterial properties, and the two graphene antibacterial layers 103 can effectively inhibit the growth and reproduction of bacteria, mold, and other microorganisms attached to the cling film. When used to wrap food, graphene can reduce the risk of food contamination by microorganisms, extend the shelf life of food, and ensure food hygiene and safety. Unlike some chemical antibacterial agents, the antibacterial effect of graphene is mainly based on physical mechanisms and will not release harmful substances into food, which meets people's requirements for food safety and health.

[0035] In one specific embodiment, the linear tear layer 102 is made of polyethylene material.

[0036] In one specific embodiment, the graphene antibacterial layer 103 is made of graphene-polyethylene composite material.

[0037] In one specific embodiment, the barrier layer 104 is made of graphene-polyamide composite material.

[0038] like Figures 3-4 As shown, this application also provides a plastic wrap packaging box, including: the plastic wrap body 1, the packaging box body 2, the protective cover 3, and the pivot 4 as described above;

[0039] The fresh-keeping film body 1 is wound on the rotating shaft 4, the rotating shaft 4 is rotationally connected in the inner cavity of the packaging box body 2, the packaging box body 2 is provided with an opening on one side, forming a film outlet 201, the protective cover 3 is used for covering the film outlet 201, and a cutter 6 is arranged on the upper portion of the film outlet 201 and used for cutting the fresh-keeping film body 1.

[0040] The protective cover 3 is used for covering the film outlet 201, so that when the fresh-keeping film is not used, foreign matters in the outside can be prevented from entering the packaging box, and the fresh-keeping film and the cutter 6 are prevented from being damaged or contaminated.

[0041] As shown in Figures 3-4 The two ends of the rotating shaft 4 extend to the outside of the packaging box body 2 and are respectively threadedly connected with adjusting nuts 5. When the fresh-keeping film is thick, the adjusting nuts 5 can be appropriately loosened if it is felt that the fresh-keeping film is difficult to pull out; when the fresh-keeping film becomes thin in the later use and is prone to loosen, the adjusting nuts 5 can be tightened, so that the fresh-keeping film can be pulled out in a proper tightness in the whole use process, and the smoothness of use is improved. The rotating shaft 4 is rotationally connected to the packaging box body 2, and when the adjusting nuts 5 on the two sides are screwed, the packaging box body 2 is clamped, so that the rotating shaft 4 is difficult to rotate, and vice versa.

[0042] As shown in Figures 5-6 The upper side of the protective cover 3 is provided with a first connecting part 301, and the lower side is provided with a second connecting part 302, the first connecting part 301 and the second connecting part 302 are fixedly connected with the packaging box body 2, an easy-to-tear strip 303 is arranged between the second connecting part 302 and the protective cover 3, and the left and right sides of the protective cover 3 are connected with the packaging box body 2 through the easy-to-tear lines. Before being opened, the protective cover 3 is tightly connected with the packaging box body 2 through the first connecting part 301, the second connecting part 302 and the easy-to-tear lines on the left and right sides, and a relatively sealed space is formed. This can effectively prevent dust, moisture and air in the outside from entering the packaging box, protect the fresh-keeping film from being contaminated and damaged, prolong the shelf life of the fresh-keeping film, and ensure the quality and performance of the fresh-keeping film. Even after the protective cover 3 is torn, although the initial sealing state cannot be completely restored, the partial structure of the protective cover 3 can still block dust to a certain extent, and if the fresh-keeping film is not used subsequently, the protective cover can be covered back as much as possible, and a certain temporary protection effect is achieved.

[0043] As shown in Figures 4-5As shown, the cutter 6 is serrated on the side away from the inner cavity of the packaging box body 2, and the lower part of the serrated side is inclinedly arranged, so that the thickness of the serrated side gradually increases from the side away from the inner cavity of the packaging box body 2 to the side close to the inner cavity of the packaging box body 2. The side of the cutter 6 away from the inner cavity of the packaging box body 2 is serrated, and the tips of the serrations are relatively sharp. When cutting the plastic wrap, the force can be concentrated on the plastic wrap, and it is easier to cut into the inside of the plastic wrap, so that the plastic wrap can be easily cut off. Compared with a smooth cutting edge, the serrated edge can effectively reduce the force required during cutting, and the user only needs to exert a little force to achieve neat cutting of the plastic wrap.

[0044] The preferred embodiments of the present application are described above, it should be noted that for those skilled in the art, without departing from the inventive concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application.

Claims

1. A multi-layered food preservation film, characterized in that, include: The plastic wrap body (1) has symmetrical serrated edges (101) on both sides of its long side. The plastic wrap body (1) has seven layers arranged from top to bottom, of which the first, fourth and seventh layers are linear tear layers (102), the third and fifth layers are graphene antibacterial layers (103), the second and sixth layers are barrier layers (104), and the three linear tear layers (102) are symmetrically distributed with the center plane of the plastic wrap body (1) in the thickness direction as the symmetrical surface.

2. The multi-layered food preservation film according to claim 1, characterized in that, The linear tear layer (102) is made of polyethylene material.

3. The multi-layered food preservation film according to claim 1, characterized in that, The graphene antibacterial layer (103) is made of graphene-polyethylene composite material.

4. The multi-layered food preservation film according to claim 1, characterized in that, The barrier layer (104) is made of graphene-polyamide composite material.

5. A food preservation film packaging box, characterized in that, include: The food preservation film body (1), the packaging box body (2), the protective cover (3), and the rotating shaft (4) as described in any one of claims 1-4; The cling film body (1) is wound around the rotating shaft (4), which is rotatably connected to the inner cavity of the packaging box body (2). The packaging box body (2) has an opening on one side to form a film outlet (201). The protective cover (3) is used to cover the film outlet (201). A cutter (6) is provided on the upper part of the film outlet (201). The cutter (6) is used to cut the cling film body (1). The cutter (6) is fixedly connected to the upper side wall of the inner cavity of the packaging box body (2).

6. A food preservation film packaging box according to claim 5, characterized in that, The two ends of the rotating shaft (4) extend to the outside of the packaging box body (2) and are respectively threaded with adjusting nuts (5).

7. A food preservation film packaging box according to claim 5, characterized in that, The protective cover (3) has a first connecting part (301) on its upper side and a second connecting part (302) on its lower side. Both the first connecting part (301) and the second connecting part (302) are fixedly connected to the main body of the packaging box (2). An easy-tear strip (303) is provided between the second connecting part (302) and the protective cover (3). The left and right sides of the protective cover (3) are connected to the main body of the packaging box (2) by an easy-tear line.

8. A food preservation film packaging box according to claim 5, characterized in that, The cutter (6) is serrated on the side away from the inner cavity of the packaging box body (2), and the lower part of the serration is inclined, so that the thickness of the serration gradually increases from the side away from the inner cavity of the packaging box body (2) to the side close to the inner cavity of the packaging box body (2).

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