Heat preservation type packaging paper box for food

Abstract

The utility model discloses a heat preservation type food packaging paper box, which belongs to the technical field of packaging paper boxes and comprises a box body, a box cover is arranged at the rear end of the top of the box body, and waterproof folded edges are connected to the left side and the right side of the top of the box body; the portable food packaging box comprises a box body and is characterized in that the upper portions of the left side and the right side of the box body are bonded with hand lifting parts, the inner wall of the box body is connected with an inner layer, a middle layer is arranged between the inner layer and the box body, the top of a box cover is bonded with a sealing strip, the bottom of the inner wall of the box body is provided with a heating groove, and the inner wall of the heating groove is provided with a heat insulation layer. According to the heat preservation type food packaging carton, the inner layer, the middle layer and the carton body are arranged to form a multi-layer composite structure, the combination of different materials can give full play to respective heat insulation advantages, the heat preservation performance of the carton is greatly improved, the interior of the carton body can be divided into the upper layer and the lower layer through the arranged partition plate, food can be stored in a separated mode, and the packaging carton is convenient to use. And mutual tainting of odors among foods is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to packing box technical field, concretely is a kind of packing paper box for thermal food. BACKGROUND

[0002] The packing paper box is a kind of paper box specially designed for food packaging, with heat preservation function, to prevent food from deteriorating or taste getting worse due to temperature drop during transportation or waiting process;This is particularly important for food that needs to maintain a certain temperature, such as fast food, take-out, cooked food, etc.;Defects: when serving food with high oiliness or sauce, the excess oil or sauce of the food may flow out through the gap between the connecting plate and the side plate, causing inconvenience during consumption and affecting the dining experience of customers. To solve the above-mentioned defects, the prior art (application number: 202220182701.1, granted on September 20, 2022, Chinese patent) discloses a packing paper box, which reserves connecting plates with different cutting directions and cutting depths during paper blank processing and cutting, and the bottom plate, side plate and connecting plate are integrally formed. When folding the paper box, the bottom plate and the side plate form a containing cavity, and the adjacent side plates are connected by the connecting plates to achieve lamination, so that there is no gap between the bottom plate, side plate and connecting plate, thereby better preventing oil or sauce from leaking out and having better sealing performance. Compared to connecting plates connected to different side plates, since the connecting plates have a tendency to return to their original state after folding, each two connecting plates are connected to the same side plate, so that the side plate is evenly stressed, thereby making the structure of the packing paper box more regular. At the same time, there is no need to change the operation angle of the connecting plate connected to the side plate multiple times. If the connecting plate connected to the side plate is towards the side of the containing cavity, since the inner wall of the containing cavity is provided with an oil-proof layer, it may result in poor connection reliability of the connecting plate, and therefore the connecting plate is connected to the side plate away from the containing cavity to improve the connection reliability of the connecting plate and ensure the sealing performance of the packing paper box.

[0003] The prior art reserves connecting plates with different cutting directions and cutting depths, and the bottom plate, side plate and connecting plate are integrally formed, thereby better preventing oil or sauce from leaking out, but the packing paper box adopts a one-layer structure design, resulting in poor heat preservation performance, and the temperature of the food will quickly drop, leading to poor taste. At the same time, it cannot directly maintain the safe temperature of the food, which will accelerate the deterioration of the food, and different flavors of food placed in the empty space are easy to mix with each other, so we have proposed the packing paper box for thermal food can well solve the above problems. SUMMARY

[0004] The purpose of this utility model is to provide an insulated food packaging box to solve the problems mentioned in the background art, which uses a single-layer structure design, resulting in poor heat preservation, rapid temperature drop of food, deterioration of taste, inability to directly maintain the safe temperature of food, accelerated food spoilage, and easy cross-contamination of flavors when different flavored foods are placed in an empty space.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a heat-insulating food packaging box, comprising a box body, a lid at the rear end of the top of the box body, and waterproof folded edges connected to the left and right sides of the top of the box body; further comprising: handles glued to the upper part of the left and right sides of the box body, an inner layer connected to the inner wall of the box body, an intermediate layer between the inner layer and the box body, a sealing strip glued to the top of the lid, a heating groove formed at the bottom of the inner wall of the box body, and a heat insulation layer provided on the inner wall of the heating groove, and a partition plate connected inside the box body.

[0006] Preferably, the intermediate layer is bonded between the box body and the inner layer, and the intermediate layer is made of aluminum foil, while the inner layer is made of natural plant fiber.

[0007] Preferably, absorbent paperboard is adhered to the bottom of both the lid and the divider to absorb moisture generated by the food.

[0008] Preferably, the heat insulation layer on the inner wall of the heating tank is used to place a heating pack for heating food.

[0009] Preferably, fixing blocks are adhered to both the left and right sides of the inner wall of the box, and positioning holes are opened inside both fixing blocks. Positioning blocks are also provided on both the left and right sides of the bottom of the partition plate.

[0010] Preferably, the positioning block and the positioning hole on the fixing block are connected by an insertion, and the partition plate is fixed inside the box by the fixing block and the positioning block.

[0011] Preferably, protrusions are bonded at equal intervals at the four corners of the bottom of the box to improve the stability of the box when placed.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This insulated food packaging box utilizes an inner layer, a middle layer, and a box body to form a multi-layer composite structure. The combination of different materials can fully utilize their respective heat insulation advantages, greatly improving the heat insulation performance of the box. Furthermore, the partition plate can divide the interior of the box into upper and lower layers, allowing for separate storage of food and preventing cross-contamination of flavors. The specific details are as follows:

[0013] (1) The box body is made of cardboard with high hardness to provide a certain compressive strength. At the same time, the inner layer is made of food-grade paper, which is in direct contact with food to ensure food safety. The middle layer is made of aluminum foil, which has the purpose of heat insulation and heat preservation, forming a multi-layer composite structure. The combination of different materials can give full play to their respective heat insulation advantages and greatly improve the heat preservation performance of the box. Furthermore, the waterproof edge is folded inward and the lid is placed on the box body. At this time, the sealing strip on the lid can improve the sealing of the box body and the lid, and prevent heat from being lost from the gap.

[0014] (2) By placing the heating pack in the heating tank and adding a certain amount of water, the heating pack will release a large amount of heat to heat the food inside the box. At the same time, the heat insulation layer can effectively block heat transfer and reduce the heat impact of the heating pack on the box.

[0015] (3) The partition is installed on the fixed block by the positioning block. The partition can separate the food and prevent the food from mixing flavors. At the same time, the absorbent cardboard can absorb the moisture generated by the food, reduce the water droplets formed by the heat in the box and help improve the taste of the food.

[0016] (4) The handles make it easy to lift the box and make it convenient for users to take the packaging box. At the same time, the four protrusions at the bottom corners of the box make the box more stable when placed and easier to stack. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the box body and lid of this utility model;

[0018] Figure 2 This is a schematic diagram of the separation structure of the inner layer and the middle layer of this utility model;

[0019] Figure 3 This is a schematic diagram of the connection structure between the box lid and the sealing strip of this utility model;

[0020] Figure 4 This is a schematic diagram of the connection structure between the partition plate and the box body of this utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the fixing block and positioning block of this utility model;

[0022] Figure 6 This is a schematic diagram of the connection structure between the protrusion and the box body of this utility model.

[0023] In the diagram: 1. Box body; 2. Box lid; 3. Waterproof folded edge; 4. Handle; 5. Sealing strip; 6. Water-absorbing cardboard; 7. Inner layer; 8. Middle layer; 9. Heating groove; 10. Heat insulation layer; 11. Divider; 12. Fixing block; 13. Positioning block; 14. Protrusion. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-6 The present invention provides the following technical solution: an insulated food packaging box;

[0026] Example 1: To address the problems of existing packaging boxes using a single-layer structure, which result in poor heat retention, rapid temperature drop of food leading to poor taste, inability to maintain a safe food temperature (accelerating spoilage), and easy cross-contamination of flavors when different foods are placed in an empty space, the following solution is disclosed. Please refer to the following for details. Figures 1-5 As shown, the device includes a box body 1, a lid 2 at the rear end of the top of the box body 1, and waterproof folded edges 3 on both the left and right sides of the top of the box body 1; it also includes: an inner layer 7 connected to the inner wall of the box body 1, and an intermediate layer 8 between the inner layer 7 and the box body 1, the intermediate layer 8 being bonded between the box body 1 and the inner layer 7, the intermediate layer 8 being made of aluminum foil, the inner layer 7 being made of natural plant fiber, a sealing strip 5 being bonded to the top of the lid 2, a heating groove 9 being provided at the bottom of the inner wall of the box body 1, and a heat insulation layer 10 being provided on the inner wall of the heating groove 9, the heat insulation layer 10 being used to place a heating pack for heating food.

[0027] When in use, food is placed inside the box 1. Because the box 1 is made of cardboard with high rigidity, it provides a certain compressive strength. At the same time, the inner layer 7 is made of food-grade paper, which comes into direct contact with the food to ensure food safety. The middle layer 8 is made of aluminum foil, which has the purpose of heat insulation. This forms a multi-layer composite structure. The combination of different materials can give full play to their respective heat insulation advantages and greatly improve the heat preservation performance of the cardboard box. Then, as needed, the heating pack can be placed in the heating tank 9 and a certain amount of water can be added. The heating pack will release a lot of heat to heat the food inside the box 1. At the same time, the heat insulation layer 10 can effectively block heat transfer and reduce the heat impact of the heating pack on the box 1. Then, the two waterproof folds 3 are folded inward and the lid 2 is placed on the box 1. At this time, the sealing strip 5 on the lid 2 can improve the sealing of the connection between the box 1 and the lid 2, preventing heat from escaping through the gaps.

[0028] Example 2: Unlike Example 1, this example utilizes a partition 11 to store food separately and prevent cross-contamination of flavors. See details... Figure 4 and Figure 5 As shown, a partition plate 11 is connected inside the box body 1. Fixing blocks 12 are glued to both the left and right sides of the inner wall of the box body 1. Positioning holes are opened inside the two fixing blocks 12. Positioning blocks 13 are set on both the left and right sides of the bottom of the partition plate 11. The positioning blocks 13 are connected to the positioning holes on the fixing blocks 12 by insertion. The partition plate 11 is fixed inside the box body 1 by the fixing blocks 12 and the positioning blocks 13. Water-absorbing cardboard 6 is glued to the bottom of the box lid 2 and the partition plate 11 to absorb the moisture generated by the food.

[0029] The divider 11 is installed on the fixed block 12 by the positioning block 13. The divider 11 can separate the food and prevent the food from mixing flavors. At the same time, the absorbent cardboard 6 can absorb the moisture generated by the food, reduce the water droplets formed by the heat in the box 1 falling on the food, and help improve the taste of the food.

[0030] Example 3: Unlike Example 2, this example can be referred to for details. Figure 1 , Figure 3 and Figure 6 As shown, handles 4 are glued to the top of both the left and right sides of the box body 1, and protrusions 14 are glued at equal intervals at the four corners of the bottom of the box body 1 to make the box body 1 more stable when placed.

[0031] The handle 4 makes it easy to lift the box 1, making it convenient for users to take the packaging box. At the same time, the four protrusions 14 at the bottom corner of the box 1 make the box more stable when placed and easier to stack.

[0032] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heat-insulating food packaging box, comprising a box body (1), wherein a lid (2) is provided at the rear end of the top of the box body (1), and waterproof folded edges (3) are connected to both the left and right sides of the top of the box body (1); characterized in that, Also includes: Handles (4) are attached to the top of both sides of the box (1). An inner layer (7) is connected to the inner wall of the box (1), and an intermediate layer (8) is provided between the inner layer (7) and the box (1). A sealing strip (5) is attached to the top of the box lid (2). A heating groove (9) is provided at the bottom of the inner wall of the box (1), and a heat insulation layer (10) is provided on the inner wall of the heating groove (9). A partition plate (11) is connected inside the box (1).

2. The insulated food packaging box according to claim 1, characterized in that: The intermediate layer (8) is bonded between the box body (1) and the inner layer (7), and the intermediate layer (8) is made of aluminum foil, while the inner layer (7) is made of natural plant fiber.

3. The insulated food packaging box according to claim 1, characterized in that: The bottom of the lid (2) and the partition (11) are both glued with absorbent paperboard (6) to absorb moisture generated by the food.

4. The insulated food packaging box according to claim 1, characterized in that: The heat insulation layer (10) on the inner wall of the heating tank (9) is used to place a heating pack for heating food.

5. The insulated food packaging box according to claim 1, characterized in that: Fixing blocks (12) are glued to both sides of the inner wall of the box (1). Positioning holes are opened inside the two fixing blocks (12). Positioning blocks (13) are provided on both sides of the bottom of the partition plate (11).

6. The insulated food packaging box according to claim 5, characterized in that: The positioning block (13) and the positioning hole on the fixing block (12) are connected by an insertion. The partition plate (11) is fixed inside the box body (1) by the fixing block (12) and the positioning block (13).

7. The insulated food packaging box according to claim 1, characterized in that: The box (1) has protrusions (14) glued at equal intervals at the four corners at the bottom to make the box (1) more stable when placed.

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