Paper box with lamination lining
By introducing a coated inner liner and a limiting block structure into the cardboard box, the problem of poor waterproofing ability of the cardboard box is solved, achieving higher mechanical strength and waterproofing effect, protecting the contents from moisture and friction damage.
Patent Information
- Application Number
- CN202520422528.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-03-12
AI Technical Summary
Traditional cardboard boxes have a single-layer structure and poor waterproofing. When exposed to water, the structure is easily damaged, affecting the safety and appearance of the contents.
The design incorporates a coated inner liner, featuring triangular prism-shaped limiting blocks and grooves, combined with a coated paper inner liner to enhance the box's stability and waterproofing, preventing moisture damage to the contents and scratches to the outer packaging.
It improves the mechanical strength and waterproof performance of the cardboard box, reduces the breakage rate during transportation and storage, and protects the appearance and quality of the contents.
Smart Images

Figure CN223764945U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of paper boxes, and more particularly to paper boxes with a coated inner liner. Background Technology
[0002] Cardboard boxes provide physical protection for the contents, preventing damage from external environmental factors such as dust, impacts, or compression during transportation, storage, and use. The surface of cardboard boxes is suitable for high-quality printing, showcasing brand logos, product information, and graphics, thereby enhancing the product's market appeal. Cardboard boxes can be designed in various shapes and sizes to meet different needs, suitable for food, daily necessities, electronics, and many other fields. Ordinary cardboard boxes are made of pulp, which rapidly absorbs water and swells upon contact with it, causing damage to the fiber structure and significantly reducing the box's strength. If the cardboard box is not waterproof, external moisture may penetrate to the interior, causing the contents to become damp. Using cardboard boxes for packaging can lead to damage to both the outer packaging and the contents in rainy weather, resulting in a poor customer experience. Furthermore, the printed text and graphics on the outside of the contents can rub against the outer packaging, causing scratches. Lamination treatment can increase the mechanical strength of cardboard boxes, making them more durable and reducing the breakage rate during transportation and storage.
[0003] When using cardboard boxes for packaging, traditional cardboard boxes have a single-layer structure, which has poor waterproofing and is easily damaged when exposed to water. Therefore, we provide cardboard boxes with a laminated inner lining. Utility Model Content
[0004] The main purpose of this utility model is to provide a paper box with a coated inner liner to solve the problem mentioned in the related technology that when using paper box packaging, the traditional paper box has a single-layer structure, poor waterproof ability, and is easily damaged by water.
[0005] To achieve the above objectives, according to one aspect of the present invention, a paper box with a coated inner liner is provided, comprising an outer paper box, the outer paper box including an outer box wall a, a side box wall a fixedly installed on one side of the outer box wall a, a side box wall b fixedly installed on the other side of the outer box wall a, a plurality of sealing box walls symmetrically fixedly installed at the upper and lower ends of the side box walls a and b, a plurality of limiting blocks a fixedly installed on the inner walls of the side box walls a and b near the two side edges, the side box walls a and b being fixedly connected through the outer box wall b, and insert blocks b fixedly installed on the left and right sides of the outer box wall b, and further comprising: an inner liner box, a limiting groove being formed on one side of the limiting block a, the inner liner box being snapped into the limiting groove.
[0006] Furthermore, the limiting block a has a triangular prism structure, the limiting groove has a triangular prism structure, and the length of the limiting groove is less than the length of the limiting block a.
[0007] Furthermore, several outer box covers are symmetrically fixedly installed on both sides of the outer box wall a, and an insert block a is fixedly installed on the other side of the outer box cover. Several oblique angles inclined towards the outer box cover are symmetrically opened on both sides of the insert block a.
[0008] Furthermore, the inner liner box includes at least an inner liner box wall a, an inner liner box wall b is fixedly installed on one side of the inner liner box wall a, a connecting box wall is fixedly installed on the other side of the inner liner box wall a, the inner liner box wall b and the other side of the connecting box wall are fixedly connected by an inner liner box wall c, and the inner liner box is made of coated paper material.
[0009] Furthermore, an inner liner box cover is fixedly installed on one side of the inner liner box wall a, and an inner liner box base is fixedly installed on one side of the inner liner box wall c.
[0010] Furthermore, a slot a is provided on one side of the side box wall a, and the insert block b is snapped into the slot a. Several limiting blocks b are fixedly installed on the inner walls of the side box wall a and the side box wall b near the upper and lower edges. An oblique angle inclined inward is provided at the opening of the slot a.
[0011] Furthermore, slots b are symmetrically provided on both sides of the outer box wall b, and the insert a is snapped into the slot b. The slot b opening is provided with an angle that tilts inward into the slot b.
[0012] Furthermore, a connecting groove is provided on one side of the connecting box wall, and a connecting block is fixedly installed on one side of the inner liner box wall a, with the connecting block fixedly installed in the connecting groove.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] This cardboard box with a laminated inner liner has a limiting block a. The limiting block a is a triangular prism structure with a limiting groove on its side wall. The inner liner is snapped into the limiting groove. The limiting block a increases the stability of the outer cardboard box structure and prevents it from being squeezed and deformed during transportation. The limiting block a and the limiting groove create a gap between the inner liner and the outer cardboard box, preventing the outer cardboard box from affecting the inner liner when it is damp. The inner liner is made of laminated paper, which serves a waterproof function and prevents the printed text and patterns on the outside of the contents from being affected by friction with the outer packaging box. It can effectively prevent scratches on the outer packaging of the product. The lamination treatment can also increase the mechanical strength of the cardboard box, making it more durable and reducing the damage rate during transportation and storage.
[0015] 2. The cardboard box with a coated inner liner is equipped with a limiting block b. The limiting block b is symmetrically fixedly installed on the side box wall a and the side box wall b. The limiting block b supports the outer box cover and the sealed box wall to prevent the outer cardboard box structure from being squeezed and deformed during transportation, which would damage the contents. The slots of slot a and slot b are both provided with an inward angle to facilitate the insertion of the insert b into slot a and the insertion of the insert a into slot b during packaging, thereby improving the stability of the cardboard box structure. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of a paper box with a coated inner liner in a preferred embodiment of the present invention;
[0017] Figure 2 This is a schematic diagram of the inner liner box structure in a preferred embodiment of the present invention;
[0018] Figure 3 This is a schematic diagram of the outer cardboard box structure in a preferred embodiment of the present invention;
[0019] Figure 4 This is a cross-sectional view of the slot b structure in a preferred embodiment of the present invention;
[0020] Figure 5 This is a schematic diagram of the slot a structure in a preferred embodiment of the present invention;
[0021] Figure 6 This is a cross-sectional view of the outer cardboard box structure in a preferred embodiment of the present invention.
[0022] 1. Outer cardboard box; 11. Outer box wall a; 12. Side box wall a; 13. Outer box wall b; 14. Side box wall b; 111. Outer box cover; 112. Insert block a; 121. Sealing box wall; 122. Slot a; 123. Limiting block b; 131. Slot b; 132. Insert block b;
[0023] 2. Inner liner box; 21. Inner liner box wall a; 22. Inner liner box wall b; 23. Inner liner box wall c; 24. Connecting box wall; 211. Inner liner box cover; 212. Connecting block; 231. Inner liner box base; 241. Connecting groove;
[0024] 3. Limiting block a; 31. Limiting groove. Detailed Implementation
[0025] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.
[0026] Please see Figures 1-6As shown, the purpose of this embodiment is to provide a paper box with a coated inner liner, including an outer paper box 1. The outer paper box 1 includes an outer box wall a11. A side box wall a12 is fixedly installed on one side of the outer box wall a11, and a side box wall b14 is fixedly installed on the other side of the outer box wall a11. Several sealing box walls 121 are symmetrically fixedly installed at the upper and lower ends of the side box walls a12 and b14. Several limiting blocks a3 are fixedly installed on the inner walls of the side box walls a12 and b14 near the two side edges, i.e., as shown in the figure. Figure 6 As shown: Limiting blocks a3 are fixedly installed at the four corners of the inner wall of the outer cardboard box 1. The side box wall a12 and the side box wall b14 are fixedly connected through the outer box wall b13. Insert blocks b132 are fixedly installed on both sides of the outer box wall b13. It also includes: inner liner box 2. A limiting groove 31 is opened on one side of the limiting block a3. The inner liner box 2 is snapped into the limiting groove 31. The sealing box wall 121, which is symmetrically fixed at both ends, supports the outer box cover 111 to improve the stability of the outer cardboard box 1 structure and prevent damage to the outer cardboard box 1 structure. The inner liner box 2, which is snapped into the limiting groove 31, plays a waterproof role and prevents the printed text and patterns on the outside of the contents from affecting the product production through friction with the outer cardboard box 1. It can effectively prevent the outer packaging of the product from being scratched. The limiting block a3 creates a gap between the outer cardboard box 1 and the inner liner box 2 to prevent the outer cardboard box 1 from affecting the inner liner box 2 when it is wet in rainy weather.
[0027] The limiting block a3 has a triangular prism structure, and the limiting groove 31 has a triangular prism structure. The limiting groove 31 is a triangular prism-shaped opening groove with the side wall and top opening of the limiting block a3. The length of the limiting groove 31 is less than the length of the limiting block a3. The triangular prism-shaped limiting block a3 supports the adjacent side wall of the outer cardboard box 1 to improve the stability of the outer cardboard box 1 structure. The bottom of the limiting groove 31 supports the inner liner box 2, so that there is a gap between the outer cardboard box 1 and the inner liner box 2, preventing the inner liner box 2 from being affected if the outer cardboard box 1 is damaged by rain.
[0028] Several outer box covers 111 are symmetrically fixedly installed on both sides of the outer box wall a11. An insert block a112 is fixedly installed on the other side of the outer box cover 111. Several oblique angles inclined towards the outer box cover 111 are symmetrically opened on both sides of the insert block a112. The oblique angles of the insert block a112 on both sides of the insert block a112 towards the outer box cover 111 facilitate the insert block a112 to be inserted into the slot b131.
[0029] The inner liner box 2 includes at least an inner liner box wall a21. An inner liner box wall b22 is fixedly installed on the other side of the inner liner box wall a21. A connecting box wall 24 is fixedly installed on the other side of the inner liner box wall a21. The inner liner box wall b22 and the connecting box wall 24 are fixedly connected on the other side by an inner liner box wall c23. The inner liner box 2 is made of coated paper. The coated paper material of the inner liner box 2 serves a waterproof function, preventing damage to the outer packaging caused by rain during transportation. At the same time, the coated paper material of the inner liner box b2 can prevent the printed text and patterns on the outside of the contents from affecting the product production through friction with the outer packaging box. It can effectively prevent scratches on the outer packaging of the product. The coated paper is a layer of polyethylene or other plastic film coated on the surface of the paper box, forming a waterproof barrier with significantly improved moisture and water resistance, while maintaining good printability.
[0030] An inner liner box cover 211 is fixedly installed on one side of the inner liner box wall a21, and an inner liner box base 231 is fixedly installed on one side of the inner liner box wall c23.
[0031] A slot a122 is provided on one side of the side box wall a12. The insert block b132 is snapped into the slot a122. Several limiting blocks b123 are fixedly installed on the inner walls of the side box wall a12 and the side box wall b14 near the upper and lower edges. The slot a122 opening has an angle that is inclined inwards. The insert block b132 is snapped into the slot a122 to increase the stability of the outer paper box 1 structure. The angle that is inclined inwards at the slot a122 opening is to facilitate the snapping of the insert block b132 into the slot a122.
[0032] Slots b131 are symmetrically provided on both sides of the outer box wall b13. Insert blocks a112 are snapped into the slots b131. The slot opening of the slot b131 has an angle that is inclined inwards. The angle that is inclined inwards at the slot opening of the slot b131 is to facilitate the insertion of insert blocks a112 into the slot b131. The insertion of insert blocks a112 into the slot b131 increases the stability of the outer paper box 1 structure.
[0033] A connecting groove 241 is provided on one side of the connecting box wall 24, and a connecting block 212 is fixedly installed on one side of the inner liner box wall a21. The connecting block 212 is fixedly installed in the connecting groove 241 and fixed by the connecting block 212 and the connecting groove 241, and is bonded by glue.
[0034] In practical use, when cardboard box packaging is required, the insert block b132 is snapped into slot a122, and the insert block a112 is snapped into slot b131 to fix the structure of the outer cardboard box 1. The angled inclination of the slot opening of slot a122 towards the inside of slot a122 facilitates the insertion of insert block b131 into slot a122, and the angled inclination of the slot opening of slot b132 towards the inside of slot b131 facilitates the insertion of insert block a112 into slot b131. The limiting block b123 supports the sealing box walls 121 and the outer box cover 111 at both ends of the outer cardboard box 1 to improve the stability of the outer cardboard box 1 structure. Several side walls a12 and b14 are symmetrically fixedly installed on one side wall. The limiting block a3 is a triangular prism structure that supports the box walls on both sides to increase the stability of the outer cardboard box 1. A limiting groove 31 is opened on one side of the limiting block a3, and the inner liner box 2 is snapped into the limiting groove 31. When the limiting block a3 is in place, there is a gap between the outer cardboard box 1 and the inner liner box 2 to prevent the inner liner box 2 from being affected when the outer cardboard box 1 is wet. The inner liner box 2 is made of coated paper, which can play a waterproof role, preventing damage to the contents and giving customers a bad experience. At the same time, the coated paper can prevent the printed text and patterns on the outside of the contents from being affected by friction with the outer packaging box, and can effectively prevent the outer packaging of the product from being scratched.
[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. A carton with a liner of a coating, comprising an outer carton (1), characterized in that, The outer paper box (1) comprises outer box wall a (11), one side of outer box wall a (11) is fixedly provided with side box wall a (12), the other side of outer box wall a (11) is fixedly provided with side box wall b (14), a plurality of sealing box walls (121) are symmetrically and fixedly installed at the upper and lower ends of side box wall a (12) and side box wall b (14), a plurality of limiting blocks a (3) are fixedly installed on the inner wall of side box wall a (12) and side box wall b (14) close to the edges of the two sides, side box wall a (12) and side box wall b (14) are fixedly connected through outer box wall b (13), outer box wall b (13) is fixedly provided with plug block b (132) on the left and right sides, and the outer box wall b (13) is fixedly provided with plug block b (132) on the left and right sides. The inner lining box (2) is provided with a limiting groove (31) on one side of the limiting block a (3), and the inner lining box (2) is connected in the limiting groove (31).
2. The carton with a lamination lined interior according to claim 1, wherein, The limiting block a (3) is a triangular prism structure, the limiting groove (31) is a triangular prism structure, and the length of the limiting groove (31) is less than the length of the limiting block a (3).
3. The carton with a lamination inner liner according to claim 1, wherein, The outer box wall a (11) is fixedly provided with a plurality of outer box covers (111) on the two sides, the other side of the outer box cover (111) is fixedly provided with a plug block a (112), and the two sides of the plug block a (112) are symmetrically provided with a plurality of inclined angles inclined to the outer box cover (111).
4. The carton with a lamination inner liner of claim 1, wherein, The inner lining box (2) comprises at least an inner lining box wall a (21), an inner lining box wall b (22) is fixedly installed on one side of the inner lining box wall a (21), and a connecting box wall (24) is fixedly installed on the other side of the inner lining box wall a (21), the other side of the inner lining box wall b (22) and the connecting box wall (24) is fixedly connected through the inner lining box wall c (23), and the inner lining box (2) is a laminated paper material.
5. The carton with a lamination inner liner according to claim 4, wherein, The inner lining box wall a (21) is fixedly provided with an inner lining box cover (211) on one side, and the inner lining box wall c (23) is fixedly provided with an inner lining box base (231) on one side.
6. The carton with a lamination inner liner according to claim 1, wherein, The side box wall a (12) is provided with a plug slot a (122) on one side, the plug block b (132) is connected in the plug slot a (122), a plurality of limiting blocks b (123) are fixedly installed on the inner wall of side box wall a (12) and side box wall b (14) close to the edges of the upper and lower two sides, and an inclined angle is formed in the slot opening of the plug slot a (122) and inclined to the plug slot a (122).
7. The carton with a lamination inner liner according to claim 1, wherein, The outer box wall b (13) is symmetrically provided with a plug slot b (131) on the two sides, the plug block a (112) is connected in the plug slot b (131), and an inclined angle is formed in the slot opening of the plug slot b (131) and inclined to the plug slot b (131).
8. The carton with a lamination inner liner according to claim 4, wherein, The connecting box wall (24) is provided with a connecting groove (241) on one side, and the inner lining box wall a (21) is fixedly provided with a connecting block (212) on one side, and the connecting block (212) is fixedly installed in the connecting groove (241).