Corrugated paperboard with double corrugated core structure

Abstract

The utility model provides a corrugated paperboard with a double corrugated core structure, including face paper, bottom paper, corrugated core A, corrugated core B, sandwich paper and a recessed area, wherein the inner sides of the face paper and bottom paper are respectively bonded with the corrugated core A and corrugated core B, and the corrugated core A and corrugated core B are bonded and connected with the recessed area provided with the sandwich paper; the utility model introduces equilateral trapezoidal flutes on the basis of traditional VU flutes, which significantly enhances the bonding area between the corrugated core and the face paper and bottom paper, and effectively prevents delamination or peeling. The equilateral trapezoidal flute design can more effectively disperse the pressure when subjected to vertical pressure, and improve the compressive strength of the carton. At the same time, it maintains an excellent buffering effect and enhances the stability of the carton under lateral impact.

Description

Technical Field

[0001] The utility model belongs to the technical field of corrugated paper, in particular to a corrugated paperboard with a double corrugated core structure. Background Art

[0002] Corrugated cardboard, as an excellent cushioning packaging material, stands out for its excellent compressive strength and excellent cushioning performance. Its structure is carefully combined with a high-strength surface layer and a corrugated corrugated core layer filled between two layers of paper. The surface layer can easily cope with the tensile and compressive loads caused by bending moments due to its excellent bending strength and tensile strength, and stably fix the position of the corrugation under various external forces such as compression, tension, and impact.

[0003] The core part of the corrugated cardboard - the core layer, mainly bears the shear stress generated by the lateral force, and shows excellent resistance when compressed, providing solid cushioning protection for the items in the carton.

[0004] However, the double-layer corrugated core paperboard widely used in the current market mostly has a V-shaped corrugated core, a U-shaped corrugated core, or a combination of the two - a VU-shaped corrugated structure. Although these structures have certain advantages, due to their unique arc angle design, the bonding area with the face paper and the backing paper is relatively small, which to a certain extent increases the risk of delamination of the paperboard during use. In addition, when the paperboard is subjected to vertical pressure, the V-shaped corrugated, U-shaped corrugated or VU-shaped corrugated structure is not ideal in terms of dispersing pressure and bearing lateral pressure, which may affect the overall compression resistance of the paperboard.

[0005] Therefore, it is very necessary to invent a corrugated paperboard with a double corrugated core structure. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a corrugated paperboard with a double corrugated core structure, comprising face paper, bottom paper, corrugated core A, corrugated core B, sandwich paper and a concave area, wherein the inner sides of the face paper and the bottom paper are respectively bonded with the corrugated core A and the corrugated core B, and the corrugated core A and the corrugated core B are bonded and connected with the concave area set in the sandwich paper;

[0007] The corrugated core A and the corrugated core B have the same structure;

[0008] The corrugated core A comprises trapezoidal flutes, V-shaped flutes and U-shaped flutes. The trapezoidal flutes, V-shaped flutes and U-shaped flutes have the same thickness. The three flutes are sequentially arranged and integrally arranged together to form a complete wave-shaped structure.

[0009] Preferably, the face paper and the backing paper are made of the same material and have the same size, and the bonding area of ​​the face paper or the backing paper with the trapezoidal flutes exceeds the bonding area with the V-shaped flutes and the U-shaped flutes.

[0010] Preferably, the plurality of recessed areas provided in the sandwich paper correspond to the trapezoidal flutes, the V-shaped flutes and the U-shaped flutes, and the thickness of the sandwich paper is greater than the thickness of the surface paper and the bottom paper.

[0011] Preferably, the V-shaped flute is located between the trapezoidal flute and the U-shaped flute, and the trapezoidal flute and the U-shaped flute can form a "W"-shaped flute.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model cleverly introduces an equilateral trapezoidal flute structure based on the traditional VU flute. This innovative design significantly increases the bonding area between the corrugated core and the face paper and the base paper. The increased plane area and the corresponding recessed area on the sandwich paper effectively prevent the occurrence of delamination or peeling. In addition, the equilateral trapezoidal flute structure can more effectively disperse the pressure when subjected to vertical pressure, thereby significantly improving the overall compressive strength of the carton.

[0014] Compared with the traditional VU-type corrugated carton, this design has added equilateral trapezoidal corrugations, but it has no significant impact on the cushioning performance and still maintains an excellent cushioning effect. More importantly, the equilateral trapezoidal corrugation design also enhances the stability of the carton when it is subjected to lateral impact, providing more comprehensive and reliable protection for the items. This innovative design not only improves the compressive strength of the carton, but also ensures its stability and cushioning performance, bringing revolutionary progress to the logistics packaging industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a partial cross-sectional structural schematic diagram of the utility model.

[0016] Figure 2 This utility model Figure 1 Schematic diagram of the local enlarged structure at A.

[0017] Figure 3 It is a schematic diagram of the structure of the corrugated core A and the sandwich paper of the utility model.

[0018] In the figure:

[0019] Face paper 1, bottom paper 2, corrugated core A3, trapezoidal flute 31, V-shaped flute 32, U-shaped flute 33, corrugated core B4, sandwich paper 5, and recessed area 6. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be described clearly and completely below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0021] In the description of the embodiments, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0022] As attached Figure 1 To Attachment Figure 3 As shown:

[0023] The utility model provides a corrugated paperboard with a double corrugated core structure, comprising a face paper 1, a bottom paper 2, a corrugated core A3, a corrugated core B4, a sandwich paper 5 and a recessed area 6, wherein the inner sides of the face paper 1 and the bottom paper 2 are respectively bonded with the corrugated core A3 and the corrugated core B4, and the corrugated core A3 and the corrugated core B4 are bonded and connected to the recessed area 6 provided with the sandwich paper 5.

[0024] The corrugated core A3 and the corrugated core B4 have the same structure. The corrugated core A3 and the corrugated core B4 not only effectively disperse the pressure, but also enhance the stability of the carton when subjected to lateral impact, providing more comprehensive and reliable protection for the articles.

[0025] The corrugated core A3 includes trapezoidal flutes 31, V-shaped flutes 32 and U-shaped flutes 33. The trapezoidal flutes 31, V-shaped flutes 32 and U-shaped flutes 33 have the same thickness and are arranged in sequence and integrated together to form a complete wavy structure. The trapezoidal flutes 31 significantly increase the bonding area between the corrugated core and the face paper 1 and the backing paper 2. Embodiment one:

[0026] Specifically, the materials and sizes of the face paper 1 and the bottom paper 2 are the same, ensuring the overall consistency and stability of the paperboard. In terms of the bonding structure, the bonding area of ​​the face paper 1 or the bottom paper 2 with the equilateral trapezoidal flute 31 is deliberately increased, exceeding the bonding area with the V-shaped flute 32 and the U-shaped flute 33. This not only strengthens the stability of the paperboard structure, but also significantly improves the compressive strength of the paperboard. By increasing the bonding area with the trapezoidal flute 31, the face paper 1 and the bottom paper 2 can better fix the position of the corrugated core, preventing peeling or delamination during transportation, use or storage, thereby ensuring the overall performance and safety of the carton.

[0027] Specifically, the numerous recessed areas 6 provided on the sandwich paper 5 correspond to the trapezoidal flutes 31, the V-shaped flutes 32 and the U-shaped flutes 33. The design of the recessed areas 6 not only further increases the bonding area between the corrugated core and the face paper 1 and the bottom paper 2, but also enhances the compression resistance of the paperboard when subjected to external pressure by closely matching with the corrugated core. In addition, the thickness of the sandwich paper 5 is deliberately designed to be greater than the thickness of the face paper 1 and the bottom paper 2. This design increases the longitudinal support force of the paperboard, allowing the paperboard to better disperse and resist pressure when subjected to vertical pressure, thereby improving the overall compression strength of the paperboard. At the same time, the increased thickness of the sandwich paper 5 also enhances the bending resistance of the paperboard, further improving the stability and durability of the carton.

[0028] Specifically, the V-shaped flute 32 is located between the trapezoidal flute 31 and the U-shaped flute 33, and the trapezoidal flute 31 and the U-shaped flute 33 can form a "W"-shaped flute, which not only increases the bonding area between the corrugated core and the face paper 1 and the base paper 2, but also improves the overall compressive strength of the corrugated board. The plane area of ​​the equilateral trapezoidal flute 31 corresponds to the concave area 6 on the sandwich paper 5, further enhancing the stability of the board.

[0029] Furthermore, when subjected to vertical pressure, the "W"-shaped flute structure can effectively disperse the pressure, making the pressure distribution more uniform, thereby improving the compression resistance and overall stability of the paperboard. In addition, the equilateral trapezoidal design of the trapezoidal flute 31 also enables the carton to maintain better stability when subjected to lateral impact, reducing the risk of deformation or damage to the carton. Embodiment 2:

[0030] The corrugated cores A3 and B4 are respectively bonded to the inner sides of the face paper 1 and the bottom paper 2, and are tightly connected to the corrugated core through the recessed area 6 on the sandwich paper 5. The trapezoidal flute 31 significantly increases the bonding area with the face paper 1 and the bottom paper 2 due to its unique equilateral trapezoidal structure, thereby enhancing the overall stability of the paperboard. The V-shaped flute 32 is located between the trapezoidal flute 31 and the U-shaped flute 33, and the three together form a "W"-shaped flute structure. This structure not only further enhances the bonding of the corrugated core with the face paper and the bottom paper, but also effectively disperses and resists external pressure from different directions.

[0031] The thickness of the sandwich paper 5 is greater than that of the face paper 1 and the bottom paper 2, which increases the longitudinal support of the paperboard. The concave area 6 on it corresponds to the flute shape of the corrugated core, and through close fit, the compression resistance of the paperboard when subjected to external pressure is enhanced. When the paperboard is subjected to vertical pressure, the "W"-shaped flute structure can evenly disperse the pressure, improving the compression resistance and overall stability of the paperboard. At the same time, the equilateral trapezoidal design of the trapezoidal flute 31 also enhances the stability of the carton when subjected to lateral impact, reducing the risk of deformation or damage of the carton.

[0032] Utilizing the technical solution described in the utility model, or those skilled in the art designing similar technical solutions inspired by the technical solution of the utility model to achieve the above-mentioned technical effects, all fall within the protection scope of the utility model.

Claims

1. A corrugated paperboard with a double corrugated core structure, characterized in that: The invention comprises a face paper (1), a back paper (2), a corrugated core A (3), a corrugated core B (4), a sandwich paper (5) and a recessed area (6), wherein the inner sides of the face paper (1) and the back paper (2) are respectively bonded with the corrugated core A (3) and the corrugated core B (4), and the corrugated core A (3) and the corrugated core B (4) are bonded and connected with the recessed area (6) provided in the sandwich paper (5); The corrugated core A (3) and the corrugated core B (4) have the same structure; The corrugated core A (3) comprises a trapezoidal flute (31), a V-shaped flute (32) and a U-shaped flute (33); the trapezoidal flute (31), the V-shaped flute (32) and the U-shaped flute (33) have the same thickness, are arranged in sequence and integrally arranged together, and together form a complete wave-shaped structure.

2. A corrugated paperboard with a double corrugated core structure as claimed in claim 1, characterized in that: The surface paper (1) and the bottom paper (2) are made of the same material and have the same size. The bonding area of ​​the surface paper (1) or the bottom paper (2) with the trapezoidal flutes (31) exceeds the bonding area with the V-shaped flutes (32) and the U-shaped flutes (33).

3. The double-corrugated core structure corrugated paperboard according to claim 1, characterized in that: The plurality of recessed areas (6) provided on the sandwich paper (5) correspond to the trapezoidal flutes (31), the V-shaped flutes (32) and the U-shaped flutes (33), and the thickness of the sandwich paper (5) is greater than the thickness of the surface paper (1) and the bottom paper (2).

4. The corrugated paperboard with a double corrugated core structure as claimed in claim 1, characterized in that: The V-shaped flute (32) is located between the trapezoidal flute (31) and the U-shaped flute (33), and the trapezoidal flute (31) and the U-shaped flute (33) can form a "W"-shaped flute.

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