Waterproof corrugated board

Abstract

The utility model belongs to the technical field of corrugated boards, and particularly relates to a waterproof corrugated board, which comprises a corrugated core layer, a surface paper layer and a bottom paper layer, the corrugated core layer comprises a wavy corrugated core, the surface paper layer and the bottom paper layer are respectively positioned on two sides of the corrugated core layer, and a water-resisting layer is arranged on the surface of the surface paper layer. Fillers with water absorption are filled between the surface paper layer and the corrugated core layer and between the bottom paper layer and the corrugated core layer; by means of the surface water-resisting layer, external water is prevented from splashing on the surface, wetting corrugated paper, breaking the corrugated paper board and affecting the structural strength and the service life, filler is filled in a filling mode, the moisture-proof comprehensiveness is guaranteed, all the positions of the inner side surface have the water absorption performance, the overall waterproof effect is improved, and the service life is prolonged. The production convenience is effectively improved, the cost is low, the filler does not need to be additionally processed, internal gaps can be filled with the filled filler, and the structural strength of the corrugated board is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of corrugated paperboards, in particular to a waterproof corrugated paperboard. Background Art

[0002] Corrugated cardboard is one of the most widely used packaging materials in the world, and is widely used in various fields, such as making cartons, sandwiches for cartons, and other packaging materials for fragile goods. Especially in transportation packaging, corrugated boxes have become one of the most common packaging methods.

[0003] When corrugated boxes are in use, in order to prevent the surface from being damaged by water, a layer of waterproof film is usually wrapped on the outer surface of the corrugated paper. Although this can avoid damage to the corrugated box caused by water on the outer surface of the corrugated box, sometimes the air is relatively humid, and the humid air will invade the interior of the corrugated box, and then soak the corrugated box, affecting the service life of the corrugated box and being unfavorable for the packaging and transportation of items inside the corrugated box.

[0004] For example, Chinese patent application number (CN202221867167.4) discloses a waterproof corrugated paperboard, which is provided with a column having a cavity in the corrugated paperboard, and a drying device is detachably provided in the cavity of the column, and the box body is made to have a long-term dry and waterproof effect by replacing the drying device. However, it is provided with a plurality of columns at intervals between the lower paper surface layer and the upper paper surface layer, that is, the corrugated paperboard between two adjacent columns is not water-absorbent, which easily causes the structural strength of the corrugated paperboard in this part to be affected by moisture;

[0005] Another example is a dry waterproof corrugated cardboard disclosed in Chinese patent application No. (CN201520762702.3) mentioned in the background technology of the application. The corrugated cardboard box has good waterproof performance by providing an inner waterproof layer, two outer waterproof layers, a desiccant layer and a cylindrical sponge. However, its production is relatively cumbersome and costly. The cylindrical sponge also needs to be manufactured separately, and the space between the peaks in the inner core paper of the corrugated cardboard is small, which undoubtedly increases the difficulty of manufacturing. Utility Model Content

[0006] The purpose of the utility model is to provide a waterproof corrugated paperboard in view of the above-mentioned technical problems, which has good waterproof effect, convenient production and low cost.

[0007] In view of this, the utility model provides a waterproof corrugated paperboard, comprising:

[0008] A corrugated core layer, comprising a corrugated core in a corrugated shape;

[0009] The surface paper layer is installed on one side of the corrugated core layer, and a waterproof layer is provided on the surface;

[0010] The bottom paper layer is installed on the other side of the corrugated core layer;

[0011] Wherein, fillers are filled between the surface paper layer and the corrugated core layer, and between the bottom paper layer and the corrugated core layer, and the fillers are water-absorbent.

[0012] In the above technical solution, further:

[0013] Filling is dry cotton.

[0014] In the above technical solution, further:

[0015] The corrugated core comprises a plurality of alternately connected convex sections and concave sections, and the cross section of a single convex section and a single concave section is in an isosceles trapezoidal shape.

[0016] In the above technical solution, further:

[0017] Two corrugated cores are provided, and a base layer is provided between the two corrugated cores;

[0018] The convex sections and concave sections on the two corrugated cores are arranged correspondingly.

[0019] In the above technical solution, further:

[0020] Two corrugated cores are provided, and a base layer is provided between the two corrugated cores;

[0021] The convex sections and concave sections on the two corrugated cores are arranged correspondingly.

[0022] In the above technical solution, further:

[0023] The supporting section is formed by bending the base layer toward one side of the corrugated core.

[0024] In the above technical solution, further:

[0025] The cross section of the supporting section is triangular, and three triangular cavities are formed with the protruding section.

[0026] The beneficial effects of the utility model are:

[0027] 1. The surface waterproof layer is used to prevent external water from splashing on the surface, soaking the corrugated paper, causing the corrugated board to break, affecting the structural strength and service life. The filling material is filled between the surface paper layer and the corrugated core layer and between the bottom paper layer and the corrugated formation to ensure comprehensive moisture-proofness, so that all parts of the inner surface have water-absorbing properties, improving the overall waterproof effect;

[0028] 2. The filling method uses fillers to effectively improve production convenience and has low cost. No additional processing of the fillers is required. At the same time, the filled fillers can fill the internal gaps and effectively improve the structural strength of the corrugated board;

[0029] 3. Through the setting of isosceles trapezoidal structure and base layer, the bonding area is increased, the structural strength is improved, and the base layer is also provided with a supporting section to improve the compression resistance of the corrugated box and extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the utility model;

[0031] Figure 2 This utility model Figure 1 The enlarged view of point A in the middle;

[0032] The markings in the figure are as follows: 1, corrugated core layer; 10, corrugated core; 100, raised section; 101, concave section; 11, base layer; 110, bonding section; 111, supporting section; 2, surface paper layer; 3, waterproof layer; 4, bottom paper layer; 5, filler; 6, cavity. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0034] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0035] Embodiment 1:

[0036] This embodiment provides a waterproof corrugated paperboard, including:

[0037] The corrugated core 10 layer 1 comprises a corrugated core 10 in a corrugated shape;

[0038] The face paper layer 2 is installed on one side of the corrugated core layer 10, and a waterproof layer 3 is provided on the surface;

[0039] The bottom paper layer 4 is installed on the other side of the corrugated core layer 10;

[0040] Wherein, fillers 5 are filled between the surface paper layer 2 and the corrugated core 10 layer 1 and between the bottom paper layer 4 and the corrugated core 10 layer 1, and the fillers 5 are water-absorbent;

[0041] At the same time, the waterproof layer 3 can be made of PE (polyethylene film) or PP (polypropylene film) to further control costs and reduce production costs;

[0042] The corrugated core 10 layer 1 and the surface paper layer 2 and the bottom paper layer 4 as well as the surface paper layer 2 and the waterproof layer 3 are all connected by bonding.

[0043] It can be seen from this embodiment that by arranging a waterproof layer 3 on the surface of the face paper layer 2, it is prevented that external water splashes on the surface, soaks the corrugated paper, causes the corrugated paperboard to break, and affects the structural strength and service life. By filling the filler 5 between the face paper layer 2 and the corrugated core 10 layer 1 and between the bottom paper layer 4 and the corrugated formation, it is possible to ensure comprehensive moisture-proofness, so that all parts of the inner surface of the corrugated paperboard have water-absorbing properties, thereby improving the overall waterproof effect;

[0044] Furthermore, the filling method using the filler 5 effectively improves the production convenience and has low cost. No additional processing of the filler 5 is required. Meanwhile, the filled filler 5 can fill the internal gap and effectively improve the structural strength of the corrugated board.

[0045] Embodiment 2:

[0046] This embodiment provides a waterproof corrugated paperboard, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0047] The filler 5 is dry cotton.

[0048] It can be seen from the present embodiment that by using dry cotton as the filler 5, the cohesion between adjacent fillers 5 can be ensured, so that adjacent fillers 5 are not easy to disperse; due to its special fiber structure and material properties, the fibers of dry cotton can be interwoven and entangled with each other to form a relatively compact structure; in the actual use of corrugated cardboard, it usually involves cutting and bending the corrugated cardboard, so using dry cotton as the filler 5 can effectively improve the stability of the filler 5 in the corrugated cardboard after cutting and bending the corrugated cardboard, and avoid the formation of gaps that affect the waterproof performance.

[0049] Embodiment 3:

[0050] This embodiment provides a waterproof corrugated paperboard, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0051] The corrugated core 10 includes a plurality of alternately connected convex segments 100 and concave segments 101, and the cross-section of a single convex segment 100 and concave segment 101 is in the shape of an isosceles trapezoid.

[0052] It can be seen from the present embodiment that by setting the cross-section of a plurality of alternately connected raised segments 100 and recessed segments 101 into an isosceles trapezoid, the bonding area between the corrugated core 10 and the surface paper layer 2 and the bottom paper layer 4 is effectively increased, the bonding strength is improved, the structural strength of the corrugated board is ensured, and each raised segment 100 and recessed segment 101 can be effectively bonded, which can ensure the structural stability of the corrugated core 10 and prevent it from being easily deformed.

[0053] Embodiment 4:

[0054] This embodiment provides a waterproof corrugated paperboard, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0055] Two corrugated cores 10 are provided, and a base layer 11 is provided between the two corrugated cores 10;

[0056] The convex sections 100 and the concave sections 101 on the two corrugated cores 10 are arranged correspondingly;

[0057] At the same time, the two corrugated cores 10 are connected to the base layer 11 by bonding.

[0058] It can be seen from the present embodiment that by arranging the corrugated core 10 into two layers and arranging the base layer 11 between the two layers of the corrugated core 10, the structural strength of the corrugated board can be improved, and the base layer 11 has a limiting effect on the two ends of the raised section 100, thereby improving the structural stability of the corrugated board. The raised sections 100 and the concave sections 101 on the two corrugated cores 10 are arranged correspondingly, so that the raised sections 100 and the concave sections 101 on the two corrugated cores 10 can provide support, thereby improving the compressive resistance.

[0059] Embodiment 5:

[0060] This embodiment provides a waterproof corrugated paperboard, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0061] There are two base layers 11, each of which includes a plurality of alternately connected adhesive segments 110 and supporting segments 111;

[0062] Among them, between two adjacent corrugated cores 10 and base layers 11, the bonding section 110 is connected to the concave section 101, and the supporting section 111 is in contact with the convex section 100;

[0063] Meanwhile, the two base layers 11 are connected by bonding.

[0064] It can be seen from this embodiment that by providing the base layer 11 with a support section 111 and the support section 111 abutting against the raised section 100, the support section 111 has a supporting effect on the raised section 100, thereby improving the compression resistance of the corrugated paper box and extending its service life.

[0065] Embodiment 6:

[0066] This embodiment provides a waterproof corrugated paperboard, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0067] The supporting section 111 is formed by bending the base layer 11 toward one side of the corrugated core 10 .

[0068] It can be seen from this embodiment that the support section 111 is formed by bending the base layer 11 toward one side of the corrugated core 10, that is, the base layer 11 adopts an integrated structure, which improves production convenience.

[0069] Embodiment 7:

[0070] This embodiment provides a waterproof corrugated paperboard, which, in addition to the technical solutions of the above embodiments, also has the following technical features:

[0071] The cross section of the supporting segment 111 is triangular, and together with the protruding segment 100 , three triangular cavities 6 are formed.

[0072] It can be seen from the present embodiment that by setting the cross section of the supporting section 111 to be triangular and forming three triangular cavities 6 with the protruding section 100 when supporting the protruding section 100, the structural strength and stability of the protruding section 100 can be effectively improved, thereby effectively improving the structural strength and compression resistance of the corrugated cardboard and extending its service life.

[0073] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A waterproof corrugated paperboard, characterized in that: include: The corrugated core layer (1) comprises a corrugated core (10); A surface paper layer (2) is installed on one side of the corrugated core layer (1), and a waterproof layer (3) is provided on the surface; A bottom paper layer (4) is installed on the other side of the corrugated core layer (1); The corrugated core (10) comprises a plurality of alternately connected convex sections (100) and concave sections (101), and the cross-section of a single convex section (100) and concave section (101) is an isosceles trapezoid; Two corrugated cores (10) are provided, and a base layer (11) is provided between the two corrugated cores (10); Wherein, the convex sections (100) and the concave sections (101) on the two corrugated cores (10) are arranged correspondingly; The base layer (11) is provided with two, and each of the base layers comprises a plurality of alternately connected adhesive segments (110) and supporting segments (111); Wherein, between two adjacent corrugated cores (10) and base layers (11), the bonding section (110) is connected to the concave section (101), and the supporting section (111) is abutted against the convex section (100); The supporting section (111) is formed by bending the base layer (11) toward one side of the corrugated core (10); Wherein, fillers (5) are filled between the surface paper layer (2) and the corrugated core layer (1) and between the bottom paper layer (4) and the corrugated core layer (1), and the fillers (5) are water-absorbent.

2. The waterproof corrugated paperboard according to claim 1, characterized in that: The filler (5) is dry cotton.

3. The waterproof corrugated paperboard according to claim 1, characterized in that: The cross section of the support section (111) is triangular, and forms three triangular cavities (6) with the raised section (100).

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