Food packaging carton convenient to flatten
By designing packaging components and reinforcing structures in food packaging cartons, the problems of contamination and structural weakening caused by grease seepage are solved, achieving stable flattening and safe use.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-04
- Publication Date
- 2026-03-17
AI Technical Summary
Existing food packaging boxes are prone to grease leakage during storage and transportation, leading to the spread of contamination, bacterial growth, weakened structural strength, and reduced stability during use.
A packaging component was designed, including side folding panels, front folding panels, a top panel, and a grease shield, which form a four-sided frame structure through folding and interlocking. Combined with a waterproof layer and a reinforcing panel, it enhances the strength of the cardboard box and prevents grease leakage.
It effectively prevents grease leakage, enhances the structural strength of the cardboard box, maintains flatness and stability, prevents bacterial growth, and ensures safe use.
Smart Images

Figure CN223999973U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging paper boxes, and more specifically, to a food packaging paper box that is easy to lay flat. Background Technology
[0002] The body of a cardboard box consists of a rectangular base and side panels around the base. The height of the side panels is generally higher than the product inside. Desserts, pastries, fast food, and other foods on the market are usually packaged in cardboard boxes.
[0003] A search revealed that Chinese patent CN219192851U discloses "a conveniently flattenable food packaging box, comprising a box body and a top cover. The box body is formed by a rectangular base plate and two opposing first side plates and two opposing second side plates surrounding the base plate. The left and right edges of the first side plates form inwardly folded first wings, and the left and right edges of the second side plates form inwardly folded second wings. The first wings and adjacent second wings are connected by tear lines. The top cover is a sleeve cover that fits over the top or bottom of the box body to maintain the box shape. After separating the first and second wings by tear lines, the box body can be easily flattened for easy access by the user." However, the following drawbacks still exist:
[0004] Because food products contain oil and packaging has limited sealing, grease can easily seep out and contaminate the packaging box during storage, transportation, or handling. This oil spreads further during the subsequent flattening process, increasing the contamination area, promoting bacterial growth and threatening health, weakening the box's structural strength, making it prone to breakage, damaging key structures, causing instability during flattening, and rendering it unusable. Therefore, a food packaging box that is easy to flatten is proposed. Utility Model Content
[0005] The purpose of this utility model is to address the existing problems where, due to the oily components in food and the limited sealing of packaging, grease easily seeps out and contaminates the packaging cardboard box during storage, transportation, or user handling and shaking. This leads to increased oil contamination during subsequent flattening, bacterial growth that threatens health, weakens the cardboard box's structural strength, makes it prone to breakage, damages key structures, causes instability when flattening, and fails to secure it, thus affecting normal use.
[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution:
[0007] The present invention is as follows: a food packaging box that is easy to flatten, including a base plate, wherein the base plate is provided with a packaging component for placing food and shielding it from stains;
[0008] The packaging assembly includes two side folding plates fixedly connected to both sides of the narrow side of the base plate, two front folding plates fixedly connected to both sides of the wide side of the base plate, a first fixing plate fixedly connected to both sides of the two front folding plates, a folding dirt shield fixedly connected to the side of one front folding plate away from the base plate, and a top plate fixedly connected to the side of the other front folding plate away from the base plate. The top plate is fixedly connected to both sides of the top plate.
[0009] As a preferred technical solution of this utility model, two first dirt-blocking plates are fixedly connected to both sides of the narrow side of the folding dirt-blocking plate, and a second dirt-blocking plate is fixedly connected to one side of the wide side of the folding dirt-blocking plate.
[0010] As a preferred technical solution of this utility model, a reinforcing plate is fixedly connected to the side of the top plate away from the positive folding plate, and a third fixing plate is fixedly connected to both sides of the narrow side of the reinforcing plate.
[0011] As a preferred technical solution of this utility model, two fixing cones are fixedly connected to the side of the side folding plate away from the bottom plate, and multiple fixing grooves are provided on the bottom plate for the fixing cones to be inserted.
[0012] As a preferred technical solution of this utility model, an observation window is installed on the top plate, and the observation window is made of transparent acrylic.
[0013] As a preferred technical solution of this utility model, the folded dirt shield is made of EPP food-grade environmentally friendly barrier paper.
[0014] As a preferred technical solution of this utility model, the bottom of the base plate is coated with a waterproof layer, which is a starch-based waterproof and vapor barrier coating.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0016] 1. By setting up the packaging components, when in use, fold the two side folding panels inward at 90° along the crease where they connect with the narrow side of the bottom plate, making them perpendicular to the bottom plate. Then, fold the crease in the middle of the two side folding panels inward at 180° and make the bottom close to the bottom plate, initially forming the two-sided support structure of the cardboard box. Then, fold the two front folding panels inward at 90° along the crease where they connect with the wide side of the bottom plate, and insert the first fixing plates on both sides into the interlayer space formed by the folding sides of the side folding panels for fixation. At this time, the two front folding panels and the two side folding panels together form the four-sided frame of the cardboard box. Then, fold the folding cover so that the folding cover is laid flat on top of the base to prevent food from leaking oil. Finally, cover the folding top plate and insert the second fixing plates on both sides of the top plate into the four-sided frame.
[0017] 2. By setting up a reinforcing plate and a third fixing plate, when in use, after the top plate is closed, the reinforcing plate is folded inward at 90° along the crease at the connection with the top plate, and the third fixing plate is inserted into the interlayer formed by folding the side folding plate twice, which can strengthen the overall strength of the cardboard box. Attached Figure Description
[0018] Figure 1 A schematic diagram of the structure of the conveniently flattenable food packaging paper box provided by this utility model;
[0019] Figure 2 A flat view of the side folding panel and top panel of the food packaging paper box that are easy to unfold, provided by this utility model;
[0020] Figure 3 A flat view of the side folding panel and folding dirt shield of the food packaging paper box that are easy to flatten out, provided by this utility model;
[0021] Figure 4 A flat lay diagram of a food packaging paper box that is easy to flatten, provided by this utility model;
[0022] Figure 5 An unfolded diagram of a food packaging paper box that is easy to flatten, as provided by this utility model.
[0023] The diagram shows: 1. Base plate; 2. Packaging assembly; 201. Side folding plate; 202. Front folding plate; 203. First fixing plate; 204. Folding dirt shield; 205. Top plate; 206. Second fixing plate; 3. First dirt shield; 4. Second dirt shield; 5. Reinforcing plate; 6. Third fixing plate; 7. Fixing cone; 8. Fixing groove; 9. Observation window. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.
[0025] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.
[0026] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.
[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0028] like Figure 1 and Figure 2 As shown, this embodiment proposes a food packaging box that is easy to flatten, including a base plate 1, on which a packaging component 2 for placing food and shielding it from stains is provided;
[0029] like Figure 3 As shown, the packaging assembly 2 includes two side folding plates 201 fixedly connected to both sides of the narrow side of the base plate 1, and two front folding plates 202 fixedly connected to both sides of the wide side of the base plate 1. Each front folding plate 202 has a first fixing plate 203 fixedly connected to both sides. A folding stain shield 204 is fixedly connected to the side of one front folding plate 202 away from the base plate 1 for placing food and preventing oil leakage. A top plate 205 is fixedly connected to the side of the other front folding plate 202 away from the base plate 1. Second fixing plates 206 are fixedly connected to both sides of the top plate 205. In use, the two side folding plates 201 are folded inwards by 90° along the creases at their connection with the narrow side of the base plate 1, making them perpendicular to the base plate 1. Then, the creases in the middle of the two side folding plates 201 are folded inwards... Fold 180° and make the bottom close to the base plate 1 to initially form the two-sided support structure of the cardboard box. Then, fold the two positive folding plates 202 inward 90° along the crease where they connect with the wide side of the base plate 1, and insert the first fixing plates 203 on both sides into the interlayer space formed by the folding of the side folding plates 201 to fix them. At this time, the two positive folding plates 202 and the two side folding plates 201 together form the four-sided frame of the cardboard box. Then, fold the folding stain shield 204 so that the folding stain shield 204 is laid flat on the base for placing food to prevent food from seeping oil. Finally, by covering the folding top plate 205 and inserting the second fixing plates 206 on both sides of the top plate 205 into the four-sided frame, the placed food can be isolated from the cardboard box to prevent food from seeping oil into the cardboard box.
[0030] like Figure 3 As shown, two first baffles 3 are fixedly connected to both sides of the narrow side of the folding baffle 204, and a second baffle 4 is fixedly connected to one side of the wide side of the folding baffle 204. When in use, the first baffles 3 and the second baffles 4 can prevent food from leaking oil from the side onto the cardboard box.
[0031] like Figure 3As shown, a reinforcing plate 5 is fixedly connected to the side of the top plate 205 away from the front folding plate 202. A third fixing plate 6 is fixedly connected to both sides of the narrow side of the reinforcing plate 5. When in use, after the top plate 205 is closed, the reinforcing plate 5 is folded inward at 90° along the crease at the connection with the top plate 205, and the third fixing plate 6 is inserted into the sandwich layer formed by folding the side folding plate 201 twice, which can strengthen the overall strength of the cardboard box.
[0032] like Figure 3 As shown, two fixing cones 7 are fixedly connected to the side of the side folding plate 201 away from the bottom plate 1. The bottom plate 1 has multiple fixing slots 8 for inserting the fixing cones 7. When in use, after the side folding plate 201 is folded twice, the fixing cones 7 on the side folding plate 201 can be inserted into the fixing slots 8 on the bottom plate 1, thereby improving the overall packaging strength of the cardboard box.
[0033] like Figure 3 As shown, an observation window 9 is installed on the top plate 205. The observation window 9 is made of transparent acrylic. When in use, the transparent observation window 9 allows users to easily observe the product inside the cardboard box without opening the box.
[0034] like Figure 3 As shown, the folding dirt shield 204 is made of EPP food-grade environmentally friendly barrier paper. The folding dirt shield 204 paper surface is composited with an environmentally friendly barrier layer, which does not require PE coating and achieves 100% biodegradability.
[0035] like Figure 3 As shown, the bottom of the base plate 1 is coated with a waterproof layer, which is a starch-based waterproof and vapor barrier coating. The starch-based waterproof and vapor barrier coating is non-toxic and harmless and can prevent the base plate 1 from softening and collapsing due to water seepage.
[0036] Specifically, when using this easy-to-flat food packaging box: Fold the two side folding plates 201 inwards by 90° along the creases connecting them to the narrow side of the base plate 1, making them perpendicular to the base plate 1. Then fold the creases in the middle of the two side folding plates 201 inwards by 180°, ensuring the bottom is flush against the base plate 1, thus initially forming the side support structure of the box. Next, fold the two front folding plates 202 inwards by 90° along the creases connecting them to the wide side of the base plate 1, and insert the first fixing plates 203 on both sides into the interlayer space formed by the folding of the side folding plates 201 for fixation. At this point, the two front folding plates 202 and the two side folding plates 201 together form the four-sided frame of the box. Then fold the folding stain-proof plate 204 so that it lies flat above the base to prevent food from leaking oil. Finally, cover the top plate 205 and insert the second fixing plates 206 on both sides of the top plate 205 into the four-sided frame (e.g., ...). Figure 3As shown), after the top plate 205 is placed on, the reinforcing plate 5 is folded inward 90° along the crease at the connection with the top plate 205, and the third fixing insert 6 is inserted into the interlayer formed by folding the side folding plate 201 twice, which can strengthen the overall strength of the cardboard box (as shown). Figure 3 (As shown).
[0037] All technical features in this embodiment can be freely combined according to actual needs.
[0038] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.
Claims
1. A food packaging carton which is easy to flatten, comprising a bottom panel (1), characterized in that, The bottom plate (1) is provided with a packaging assembly (2) for placing food to prevent stains; The packaging assembly (2) comprises two side folding plates (201) fixedly connected to the two sides of the narrow surface of the bottom plate (1), two normal folding plates (202) fixedly connected to the two sides of the wide surface of the bottom plate (1), first fixed insertion plates (203) fixedly connected to the two sides of the two normal folding plates (202), a folding stain shielding plate (204) fixedly connected to the side of one normal folding plate (202) away from the bottom plate (1), a top plate (205) fixedly connected to the side of the other normal folding plate (202) away from the bottom plate (1), and second fixed insertion plates (206) fixedly connected to the two sides of the top plate (205).
2. A food packaging carton according to claim 1, wherein, The folding stain shielding plate (204) is provided with two first stain shielding plates (3) fixedly connected to the two sides of the narrow surface of the folding stain shielding plate (204), and a second stain shielding plate (4) fixedly connected to one side of the wide surface of the folding stain shielding plate (204).
3. A food packaging carton according to claim 1, wherein, The top plate (205) is provided with a reinforcing plate (5) fixedly connected to the side of the top plate (205) away from the normal folding plate (202), and third fixed insertion plates (6) fixedly connected to the two sides of the narrow surface of the reinforcing plate (5).
4. The conveniently flattenable food packaging carton according to claim 1, wherein The side folding plate (201) is provided with two fixed cones (7) fixedly connected to the side of the side folding plate (201) away from the bottom plate (1), and the bottom plate (1) is provided with a plurality of fixed grooves (8) for matching the insertion of the fixed cones (7).
5. The self-leveling food packaging carton of claim 1, wherein, The top plate (205) is provided with an observation window (9), and the material of the observation window (9) is transparent acrylic.
6. A food packaging carton according to claim 1 wherein, The folding stain shielding plate (204) is EPP food-grade environmentally friendly barrier paper.
7. A food packaging carton according to claim 1 wherein, The bottom plate (1) is coated with a waterproof layer at the bottom, and the waterproof layer is a starch-based waterproof and vapor-resistant coating.
Citation Information
Patent Citations
Food packaging carton convenient to flatten
CN219192851U