Corrugated board for waterproof flame-retardant box body

Abstract

The corrugated board comprises two surface paper layers, a paper clamping layer and two corrugated core layers, the paper clamping layer is located between the two surface paper layers, the two corrugated core layers are bonded between the paper clamping layer and the two surface paper layers respectively, each corrugated core layer comprises at least one core layer unit, and the core layer units are arranged between the two surface paper layers. Each core layer unit comprises at least two pieces of corrugated medium paper which are arranged at intervals, the corrugated medium paper is in a corrugated shape and forms a plurality of arc-shaped grooves, in the same core layer unit, the arc-shaped grooves extend in the arrangement direction of the corrugated medium paper, at least one parting strip is bonded to each of the two end faces of the paper clamping layer in the thickness direction, the parting strips are bonded to the corresponding surface paper layers, and the surface paper layers are bonded to the parting strips. And the division bars are positioned between two adjacent corrugated medium paper of the same core layer unit. According to the corrugated board for the waterproof and flame-retardant box body, water or flame can be effectively prevented from rapidly flowing in the length direction of the arc-shaped grooves of the corrugated core layer, so that the waterproof and flame-retardant effects are better.

Description

Technical Field

[0001] The present invention relates to the technical field of carton cardboard, and particularly relates to a corrugated cardboard for a waterproof and flame-retardant box body. Background Art

[0002] Corrugated cardboard is generally formed by bonding a corrugated core layer and face paper layers on both sides of the corrugated core layer. Corrugated cardboard has good ductility and compressive and tensile properties, and is a common structure used for preparing box bodies. In related technologies, generally, a waterproof coating and a flame-retardant coating are applied on the surface of the face paper layer to achieve a certain waterproof and flame-retardant effect. However, it is found during use that since the corrugated core layer is corrugated and has a plurality of penetrating arc-shaped grooves, when water or flame passes through the face paper layer, under the guidance of the arc-shaped grooves, it will flow rapidly along the length direction of the arc-shaped grooves, and then rapidly spread to other positions of the corrugated cardboard, resulting in a poor waterproof and flame-retardant effect. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a corrugated cardboard for a waterproof and flame-retardant box body, which can effectively prevent water or flame from flowing rapidly along the length direction of the arc-shaped grooves of the corrugated core layer, thereby making the waterproof and flame-retardant effect better.

[0004] The corrugated cardboard for a waterproof and flame-retardant box body according to an embodiment of the present invention includes two face paper layers, a sandwich paper layer, and two corrugated core layers. The sandwich paper layer is located between the two face paper layers, and the two corrugated core layers are respectively bonded between the sandwich paper layer and the two face paper layers. The corrugated core layer includes at least one core layer unit, and the core layer unit includes at least two corrugated core papers arranged at intervals. The corrugated core papers are corrugated to form a plurality of arc-shaped grooves. In the same core layer unit, the arc-shaped grooves extend along the arrangement direction of the corrugated core papers. Wherein, at least one partition strip is bonded to each of the two end faces in the thickness direction of the sandwich paper layer, the partition strip is bonded to the corresponding face paper layer, and the partition strip is located between two adjacent corrugated core papers in the same core layer unit.

[0005] The corrugated cardboard for a waterproof and flame-retardant box body according to an embodiment of the present invention has at least the following beneficial effects:

[0006] In the present invention, in addition to applying a waterproof coating and a flame-retardant coating on the two face paper layers for waterproofing and flame retardancy, the core layer unit is also divided into at least two corrugated core papers arranged at intervals. In the same core layer unit, the arc-shaped grooves extend along the arrangement direction of the corrugated core papers. Partition strips are bonded to the two end faces of the sandwich paper layer, and the partition strips can isolate the arc-shaped grooves of two adjacent corrugated core papers in the core layer unit, thereby effectively preventing water or flame from flowing rapidly along the length direction of the arc-shaped grooves of the corrugated core layer, and thus making the waterproof and flame-retardant effect of the corrugated cardboard better.

[0007] According to some embodiments of the present invention, a plurality of accommodating cavities are provided in the partition bar, and the plurality of accommodating cavities are arranged along the length direction of the partition bar. A first through hole connecting the accommodating cavities is provided on the side wall of the partition bar. In the same partition bar, some of the accommodating cavities contain flame retardants, and some of the accommodating cavities contain desiccant.

[0008] According to some embodiments of the present invention, two adjacent accommodating cavities respectively accommodate the flame retardant and the desiccant, and the first through hole connecting the two adjacent accommodating cavities is located on two opposite sides of the partition bar.

[0009] According to some embodiments of the present invention, the corrugated medium paper is provided with a plurality of second through holes between two adjacent arc-shaped grooves.

[0010] According to some embodiments of the present invention, the arrangement directions of the corrugated core paper of the core layer units on both sides of the interlayer are perpendicular to each other, and the extension directions of the arc grooves of the corrugated core paper on both sides of the interlayer are perpendicular to each other.

[0011] According to some embodiments of the present invention, the interlayer is provided with a third through hole connected to the accommodating cavity, and the third through hole connected to the multiple accommodating cavities of the partition strip is connected to one of the arc grooves of the corrugated core paper on the side of the interlayer away from the partition strip.

[0012] According to some embodiments of the present invention, opposite sides of the partition strip are respectively bonded to adjacent corrugated core papers, and grooves are respectively formed on the adjacent sides of two adjacent corrugated core papers of the same core layer unit, and the grooves extend to both ends of the adjacent partition strips in the length direction.

[0013] According to some embodiments of the present invention, the corrugated core layer includes at least two core layer units arranged at intervals, the surface paper layer forms an easy-folding zone, and along the projection in the thickness direction of the interlayer layer, the area between two adjacent core layer units of the corrugated core layer covers the easy-folding zone.

[0014] According to some embodiments of the present invention, the end surfaces of the easy-folding area and the interlayer that are close to each other are both bonded with waterproof films, and along the projection in the thickness direction of the interlayer, the waterproof films extend to the outside of the easy-folding area.

[0015] According to some embodiments of the present invention, an extension portion is formed at one of the adjacent ends of the two surface paper layers, the end of the extension portion is bonded to the outer surface of the other one, and the extension portion covers the outer edge of the corrugated core layer and the outer edge of the interlayer.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the drawings and embodiments, where:

[0018] Figure 1 is a schematic diagram of the overall structure of the corrugated cardboard for the waterproof and flame-retardant box body of the present invention;

[0019] Figure 2 is Figure 1 an exploded view of

[0020] Figure 3 is Figure 2 a schematic diagram of the face paper layer in

[0021] Figure 4 is Figure 2 a schematic diagram of the paper sandwich layer in

[0022] Figure 5 is Figure 2 a schematic diagram of the two corrugated core layers in

[0023] Figure 6 is Figure 1 a partial cross-sectional view of

[0024] Figure 7 is Figure 6 a partial enlarged view of the A position in

[0025] Reference numerals in the drawings:

[0026] Face paper layer 100; Easy-to-fold area 101; Extension part 102; Waterproof and flame-retardant coating 103;

[0027] Paper sandwich layer 200; Partition strip 201; Accommodation cavity 202; First through hole 203; Third through hole 204;

[0028] Corrugated core layer 300; Core layer unit 301; Corrugated core paper 302; Arc-shaped groove 303; Second through hole 304; Groove 305;

[0029] Waterproof film 400. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as limiting the present invention.

[0031] In the description of the present invention, it should be understood that when it comes to orientation descriptions, such as up, down, etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0032] In the description of the present invention, "a plurality of" means more than two. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0034] Next, refer to Figures 1 to 7 Describe the corrugated cardboard for a waterproof and flame-retardant box according to an embodiment of the present invention.

[0035] As Figures 1 to 7 shown, the corrugated cardboard for a waterproof and flame-retardant box according to an embodiment of the present invention includes two face paper layers 100, a sandwich paper layer 200, and two corrugated core layers 300.

[0036] Among them, the sandwich paper layer 200 is located between the two face paper layers 100, and the two corrugated core layers 300 are respectively bonded between the sandwich paper layer 200 and the two face paper layers 100, that is, both the face paper layer 100 and the sandwich paper layer 200 are bonded to the corrugated core layer 300.

[0037] The corrugated core layer 300 includes at least one core layer unit 301. For example, it can include two core layer units 301. The core layer unit 301 includes at least two corrugated core papers 302 arranged at intervals. For example, the core layer unit 301 can include two corrugated core papers 302 arranged at intervals. The corrugated core paper 302 is corrugated, that is, wavy. Further, the corrugated core paper 302 can form a plurality of arc-shaped grooves 303. The adjacent two arc-shaped grooves 303 of the corrugated core paper 302 are located on different sides of the corrugated core paper 302. In the same core layer unit 301, the arc-shaped grooves 303 extend along the arrangement direction of the corrugated core paper 302. For example, the arc-shaped grooves 303 of the adjacent two corrugated core papers 302 in the same core layer unit 301 correspond to each other, and the corresponding two arc-shaped grooves 303 can be located on the same straight line. Among them, at least one spacer 201 is adhesively bonded to the two end faces in the thickness direction of the interlayer 200. The spacer 201 is adhesively bonded to the corresponding face paper layer 100, and the spacer 201 is located between the adjacent two corrugated core papers 302 in the same core layer unit 301. The spacer 201 can be prepared from a waterproof and flame-retardant material.

[0038] In the present invention, in addition to applying waterproof and flame-retardant coatings on the two face paper layers 100, the core layer unit 301 is divided into at least two corrugated core papers 302 arranged at intervals. In the same core layer unit 301, the arc-shaped grooves 303 extend along the arrangement direction of the corrugated core paper 302. Spacers 201 are adhesively bonded to the two end faces of the interlayer 200. The spacers 201 can isolate the arc-shaped grooves 303 of the adjacent two corrugated core papers 302 in the core layer unit 301, and thus can effectively prevent water or flame from flowing rapidly along the length direction of the arc-shaped grooves 303 of the corrugated core layer 300, so that the waterproof and flame-retardant effect of the corrugated board is better. The spacers 201 can also be prepared from a waterproof and flame-retardant material, and thus the waterproof and flame-retardant effect is better.

[0039] In some embodiments of the present invention, as Figure 7 shown, a plurality of accommodation cavities 202 are provided in the spacer 201. The plurality of accommodation cavities 202 are arranged along the length direction of the spacer 201. The side wall of the spacer 201 is provided with first through holes 203 communicating with the accommodation cavities 202. In the same spacer 201, some accommodation cavities 202 contain a flame retardant, and some accommodation cavities 202 contain a desiccant. In this embodiment, the flame retardant can be a halogen-based flame retardant that can generate flame-retardant gas when heated, or other suitable flame retardants, and the desiccant can be a common desiccant.

[0040] In this embodiment, in addition to blocking the flow of water and flame by itself, the spacer 201 is internally provided with a plurality of accommodation cavities 202. The accommodation cavities 202 are provided with first through holes 203. Some of the accommodation cavities 202 contain flame retardants, and some of the accommodation cavities 202 contain desiccants. In this way, before the corrugated cardboard is heated and burned, the flame retardant in the accommodation cavity 202 can be heated to generate flame retardant gas, and the flame retardant gas can enter the arc-shaped groove 303 through the corresponding first through hole 203 for flame retardance, thereby further improving the flame retardant effect. In addition, when there is a lot of water vapor in the arc-shaped groove 303, the water vapor can be absorbed by the desiccant through the corresponding first through hole 203, thereby further improving the waterproof and moisture-proof effect.

[0041] In some embodiments of the present invention, two adjacent accommodation cavities 202 respectively contain a flame retardant and a desiccant, and the first through holes 203 communicated with the two adjacent accommodation cavities 202 are located on opposite sides of the spacer 201. In this way, the situation that the flame retardant and the desiccant in the two adjacent accommodation cavities 202 affect each other and reduce the flame retardant effect and the moisture-proof effect can be reduced.

[0042] In some embodiments of the present invention, as Figure 5 shown, the corrugated core paper 302 is provided with a plurality of second through holes 304 between two adjacent arc-shaped grooves 303. In this embodiment, the corrugated core paper 302 is provided with a plurality of second through holes 304 between two adjacent arc-shaped grooves 303, so that all the arc-shaped grooves 303 of the corrugated core paper 302 can be communicated with each other. Furthermore, the flame retardant gas generated by the flame retardant can quickly enter other arc-shaped grooves 303 through the adjacent arc-shaped grooves 303, so that the flame retardance is more comprehensive and thorough, and the flame retardant effect is better. In addition, the desiccant can also quickly absorb the water vapor in other arc-shaped grooves 303 through the adjacent arc-shaped grooves 303, and the moisture-proof and waterproof are more comprehensive and thorough, and the moisture-proof and waterproof effect is better.

[0043] In some embodiments of the present invention, as Figure 2 and Figure 5 shown, the arrangement directions of the corrugated core papers 302 of the core layer units 301 on both sides of the paper clamping layer 200 are perpendicular to each other, and the extending directions of the arc-shaped grooves 303 of the corrugated core papers 302 on both sides of the paper clamping layer 200 are perpendicular to each other. Generally, the corrugated core paper 302 has high tensile and compressive strength along the length direction of the arc-shaped groove 303, and better ductility along the direction perpendicular to the length direction of the arc-shaped groove 303.

[0044] In this embodiment, the arrangement directions of the corrugated core paper 302 of the core layer units 301 on both sides of the interlayer 200 are perpendicular to each other, and the extension directions of the arc grooves 303 of the corrugated core paper 302 on both sides of the interlayer 200 are perpendicular to each other. In this way, the corrugated paperboard can have better tensile and compressive strength in all directions, and the corrugated paperboard can have better ductility in all directions, thereby further improving the performance of the corrugated paperboard.

[0045] In some embodiments of the present invention, Figure 7 As shown, the interlayer 200 is provided with a third through hole 204 connected to the accommodating cavity 202, and the third through hole 204 connected to the multiple accommodating cavities 202 of the partition bar 201 is connected to one of the arc grooves 303 of the corrugated core paper 302 on the side of the interlayer 200 away from the partition bar 201. In this embodiment, the flame retardant generated by the flame retardant in the accommodating cavity 202 of the partition bar 201 can enter the arc groove 303 corresponding to the corrugated core paper 302 on the side of the interlayer 200 away from the partition bar 201 through the third through hole 204, and then the flame retardant generated by the flame retardant can not only flame retard the adjacent corrugated core paper 302, but also flame retard the corrugated core paper 302 on the side of the interlayer 200 away from the partition bar 201, so that the flame retardant is more comprehensive and thorough, and the flame retardant effect is better. Moreover, the desiccant in the accommodating cavity 202 of the partition bar 201 can also absorb the water vapor in the arc groove 303 of the corrugated core paper 302 on the side of the interlayer 200 away from the partition bar 201 through the third through hole 204, thereby being able to make the corrugated core paper 302 on the side of the interlayer 200 away from the partition bar 201 moisture-proof and waterproof, and the moisture-proof and waterproofing are more comprehensive and thorough, and the moisture-proof and waterproofing effect is better.

[0046] In addition, since the arrangement directions of the corrugated core paper 302 of the core layer units 301 on both sides of the interlayer 200 are perpendicular to each other, the extension directions of the arc grooves 303 of the corrugated core paper 302 on both sides of the interlayer 200 are perpendicular to each other, in this way, the third through hole 204 connected to the multiple accommodating cavities 202 of the partition bar 201 can be connected to one of the arc grooves 303 of the corrugated core paper 302 on the side of the interlayer 200 away from the partition bar 201, and the corrugated core paper 302 will not block the third through hole 204, which is more practical.

[0047] In some embodiments of the present invention, Figure 7 As shown, opposite sides of the spacer 201 are respectively bonded to adjacent corrugated paper 302 , and grooves 305 are respectively formed on the adjacent sides of two adjacent corrugated paper 302 of the same core layer unit 301 , and the grooves 305 extend to both ends of the adjacent spacer 201 in the length direction.

[0048] In this embodiment, on the side where two adjacent corrugated core papers 302 of the same core layer unit 301 are close to each other, not all of them are bonded to the side wall of the spacer 201, but a groove 305 is formed. In this way, the flame-retardant gas generated by the flame retardant can quickly enter all the arc-shaped grooves 303 through the groove 305, making the flame retardancy faster, more comprehensive and thorough, and the flame-retardant effect better. In addition, the desiccant can quickly absorb the water vapor in all the arc-shaped grooves 303 through the groove 305, making the moisture-proof and waterproofing faster, more comprehensive and thorough, and the moisture-proof and waterproofing effect better.

[0049] In some embodiments of the present invention, as Figures 1 to 4 and Figure 6 shown, the corrugated core layer 300 includes at least two core layer units 301 arranged at intervals. The face paper layer 100 forms a foldable area 101. Along the projection in the thickness direction of the paper sandwich layer 200, the area between two adjacent core layer units 301 of the corrugated core layer 300 covers the foldable area 101.

[0050] The foldable area 101 is used to facilitate bending when the cardboard forms a carton. In this embodiment, the area between two adjacent core layer units 301 of the corrugated core layer 300 covers the foldable area 101, that is, there is no corrugated core layer 300 at the position corresponding to the foldable area 101. In this way, it is not only more convenient to bend, but also can avoid damaging the corrugated core layer 300 during bending.

[0051] In some embodiments of the present invention, as Figure 4 and Figure 6 shown, waterproof membranes 400 are bonded to the end faces of the foldable area 101 and the paper sandwich layer 200 that are close to each other. Along the projection in the thickness direction of the paper sandwich layer 200, the waterproof membrane 400 extends to the outside of the foldable area 101. After the cardboard is bent, cracks are likely to appear in the foldable area 101, resulting in a decrease in the waterproof effect. In this embodiment, waterproof membranes 400 are bonded to the end faces of the foldable area 101 and the paper sandwich layer 200 that are close to each other. In this way, the waterproof and moisture-proof effect of the cardboard at the bending position can be greatly improved.

[0052] In some embodiments of the present invention, as Figure 1 , Figure 3 and Figure 6 shown, one of the ends of the two face paper layers 100 that are close to each other forms an extension part 102, and the end of the extension part 102 is bonded to the outer surface of the other. The extension part 102 covers the outer edges of the corrugated core layer 300 and the paper sandwich layer 200. In this embodiment, the face paper layer 100 forms an extension part 102, and the extension part 102 covers the outer edges of the corrugated core layer 300 and the paper sandwich layer 200. In this way, it can not only effectively prevent external water vapor and flame from entering the cardboard, but also form a closed space inside the cardboard, reducing the entry of external oxygen, and thus can further improve the fireproof effect.

[0053] In some embodiments of the present invention, as Figure 7 shown, the inner surface of the facial tissue layer 100 is coated with a waterproof and flame-retardant coating 103. The waterproof and flame-retardant coating 103 can further improve the waterproof and flame-retardant effect. Moreover, since the waterproof and flame-retardant coating 103 is located on the inner surface of the facial tissue layer 100, it can be prevented from being damaged when exposed.

[0054] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the relevant art.

Claims

1. A corrugated cardboard for a waterproof and flame-retardant box, characterized in that, include: Two tissue layers; An interlayer is located between the two surface paper layers; Two corrugated core layers are respectively bonded between the interlayer and the two surface paper layers, the corrugated core layer comprises at least one core layer unit, the core layer unit comprises at least two corrugated core papers arranged at intervals, the corrugated core papers are corrugated and have a plurality of arc grooves formed thereon, and in the same core layer unit, the arc grooves extend along the arrangement direction of the corrugated core papers; Wherein, at least one spacer is respectively bonded to two end faces of the interlayer in the thickness direction, the spacer is bonded to the corresponding surface paper layer, and the spacer is located between two adjacent corrugated core papers of the same core layer unit.

2. The corrugated cardboard for a waterproof and flame-retardant box according to claim 1, characterized in that, A plurality of accommodating cavities are arranged in the partition bar along the length direction of the partition bar, a first through hole is provided on the side wall of the partition bar to connect the accommodating cavities, and in the same partition bar, some of the accommodating cavities contain flame retardants, and some of the accommodating cavities contain desiccants.

3. The corrugated cardboard for a waterproof and flame-retardant box according to claim 2, wherein The two adjacent accommodating chambers respectively accommodate the flame retardant and the desiccant, and the first through hole communicating with the two adjacent accommodating chambers is located on two opposite sides of the partition bar.

4. The corrugated cardboard for a waterproof and flame-retardant box according to claim 2, characterized in that, The corrugated core paper is provided with a plurality of second through holes between two adjacent arc-shaped grooves.

5. The corrugated cardboard for a waterproof and flame-retardant box according to claim 2, wherein, The arrangement directions of the corrugated core papers of the core layer units on both sides of the interlayer are perpendicular to each other, and the extension directions of the arc-shaped grooves of the corrugated core papers on both sides of the interlayer are perpendicular to each other.

6. The corrugated cardboard for a waterproof and flame-retardant box according to claim 5, characterized in that, The interlayer is provided with a third through hole connected to the accommodating cavity, and the third through hole connected to the multiple accommodating cavities of the partition bar is connected to one of the arc grooves of the corrugated core paper on the side of the interlayer away from the partition bar.

7. The corrugated cardboard for a waterproof and flame-retardant box according to claim 2, wherein, The opposite sides of the spacer are respectively bonded to the adjacent corrugated core papers, and grooves are respectively formed on the adjacent sides of the two adjacent corrugated core papers of the same core layer unit, and the grooves extend to both ends of the adjacent spacer in the length direction.

8. The corrugated cardboard for a waterproof and flame-retardant box according to claim 1, wherein The corrugated core layer comprises at least two core layer units arranged at intervals, the surface paper layer forms an easy-folding area, and along the projection in the thickness direction of the interlayer, the area between two adjacent core layer units of the corrugated core layer covers the easy-folding area.

9. The corrugated cardboard for a waterproof and flame-retardant box according to claim 8, characterized in that, The end surfaces of the easy-folding area and the interlayer that are close to each other are both bonded with waterproof films, and along the projection in the thickness direction of the interlayer, the waterproof films extend to the outside of the easy-folding area.

10. The corrugated cardboard for a waterproof and flame-retardant box according to claim 1, wherein An extension portion is formed at one of the ends of the two surface paper layers that are close to each other, and a terminal end of the extension portion is bonded to the outer surface of the other one, and the extension portion covers the outer edge of the corrugated core layer and the outer edge of the interlayer.

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