Hydrophobic insulated corrugated paperboard
Patent Information
- Application Number
- CN202522178286.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-15
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-10-15
AI Technical Summary
[0003]瓦楞纸能抵受搬运过程中的碰撞和摔跌，是现代包装的必要材料，现有技术中的瓦楞纸板包括第一面纸、第二面纸以及设置在第一面纸和第二面纸之间的瓦楞纸，瓦楞纸多是呈波浪形横向排列在第一面纸和第二面纸之间，但是这种结构的纸板的疏水性相对较差，同时这种结构的纸板由于波浪形通道形成空气对流，热量容易排出，隔热效果相对较差
本实用新型在面纸层远离第一瓦楞纸层的一侧通过设置有疏水隔热涂层，疏水性能相对较好，并且在第一波浪形瓦楞纸朝向里纸层的一侧设置有多个第二波浪形瓦楞纸，同一个条形槽中，其中一个第二波峰部会对相邻的第二波峰部起到阻隔效果，从而阻挡条形槽里的空气流动，能够减少热量对流，起到隔热的作用，隔热效果相对较好。
Smart Images
Figure CN224898280U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of corrugated paper technology, specifically to a hydrophobic and heat-insulating corrugated cardboard. Background Technology
[0002] Corrugated paper is a sheet-like material made by bonding linerboard and corrugated paper that has been processed into a wave shape using corrugated rollers. Corrugated paper has been invented and used for more than 100 years. It has advantages such as low cost, light weight, easy processing, high strength, excellent printability, and convenient storage and transportation. More than 80% of corrugated paper can be recycled. Corrugated paper can be used for packaging food or digital products. It is relatively environmentally friendly and widely used.
[0003] Corrugated cardboard can withstand collisions and drops during handling, making it an essential material for modern packaging. Existing corrugated cardboard includes a first face, a second face, and corrugated paper placed between the first and second faces. The corrugated paper is often arranged horizontally in a wavy shape between the first and second faces. However, this type of cardboard has relatively poor hydrophobicity. At the same time, due to the air convection formed by the wavy channels, heat is easily dissipated, resulting in relatively poor heat insulation.
[0004] In view of this, the applicant has conducted in-depth research on the above-mentioned issues, which led to this case. Utility Model Content
[0005] The purpose of this invention is to provide a hydrophobic and heat-insulating corrugated cardboard with relatively good hydrophobicity and heat insulation effect.
[0006] To achieve the above objectives, the present invention adopts the following technical solution: A hydrophobic and heat-insulating corrugated cardboard includes a face paper layer, a first corrugated paper layer, and a liner paper layer. The first corrugated paper layer is located between the face paper layer and the liner paper layer. A hydrophobic and heat-insulating coating is provided on the side of the face paper layer away from the first corrugated paper layer. The first corrugated paper layer includes a first wavy corrugated paper and a plurality of second wavy corrugated papers. The first wavy corrugated paper includes alternating first crests and first troughs. Each second wavy corrugated paper is located on the side of the first wavy corrugated paper facing the liner paper layer and is equally spaced along the width direction of the first wavy corrugated paper. Each second wavy corrugated paper includes alternating second crests and second troughs. The length direction of each second wavy corrugated paper is the same as the length direction of the first wavy corrugated paper. The second wavy corrugated paper layers are located on the same side of the first wavy corrugated paper layer. The second trough portion is arranged in a one-to-one correspondence with each of the first trough portions of the first corrugated paper and is bonded to each other. The second crest portion of the same second corrugated paper is arranged in a one-to-one correspondence with each of the first crest portions of the first corrugated paper and is bonded to each other. On the side of the first corrugated paper facing the inner paper layer, a strip groove is formed at the position corresponding to each of the first crest portions. Each second crest portion is located in the corresponding strip groove. Each second corrugated paper is divided into multiple groups of sequentially arranged corrugated units along the width direction of the first corrugated paper. In the same group of corrugated units, the distance between each second crest portion located in the same strip groove and the corresponding first crest portion gradually decreases or gradually increases along the width direction of the first corrugated paper, or first gradually decreases and then gradually increases.
[0007] As an improvement of this utility model, the hydrophobic heat-insulating coating is a hydrophobic heat-insulating coating made of SiO2 aerogel.
[0008] As an improvement of this utility model, the wet film thickness of the hydrophobic heat-insulating coating is 40μm-80μm.
[0009] As an improvement of this utility model, the first corrugated paper is bonded with filler on the side facing the face paper layer by an adhesive layer.
[0010] As an improvement of this utility model, the filling material is one or both of long-pile yarn and cotton wadding.
[0011] As an improvement of this utility model, there are two or more first corrugated paper layers, each of which is arranged sequentially along the direction from the face paper layer to the inner paper layer, and a partition paper is provided between two adjacent first corrugated paper layers.
[0012] As an improvement of this utility model, a graphic layer is provided between the face paper layer and the hydrophobic heat insulation coating.
[0013] By adopting the above technical solution, this utility model has the following beneficial effects: This invention features a hydrophobic and heat-insulating coating on the side of the face paper layer away from the first corrugated paper layer, resulting in relatively good hydrophobic properties. Furthermore, multiple second corrugated papers are provided on the side of the first corrugated paper layer facing the inner paper layer. In the same groove, one of the second wave crests will block the adjacent second wave crests, thereby blocking the airflow in the groove and reducing heat convection, thus providing heat insulation. The heat insulation effect is relatively good. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model; Figure 2 This is a schematic diagram of the structure of Embodiment 1 of the present invention, in which the inner paper layer and the hydrophobic heat insulation coating are omitted; Figure 3 This is a structural schematic diagram of Embodiment 2 of the present invention.
[0015] The markings in the diagram correspond as follows: 10 - Face paper layer; 20 - First corrugated paper layer; 21-Inner paper layer; 22-First corrugated paper; 23-Second wavy corrugated paper; 24-Hydrophobic and heat-insulating coating; 25 - Spacer paper. Detailed Implementation
[0016] The utility model will be further described below with reference to the accompanying drawings and specific embodiments.
[0017] The terms "first," "second," etc., used in the specification, claims, and drawings of this utility model are used to distinguish different objects, rather than to describe a specific order.
[0018] Example 1: like Figures 1-2 As shown, this embodiment provides a hydrophobic and heat-insulating corrugated cardboard, including a face paper layer 10, a first corrugated paper layer 20, and a liner paper layer 21. The first corrugated paper layer 20 is located between the face paper layer 10 and the liner paper layer 21. A hydrophobic and heat-insulating coating 24 is provided on the side of the face paper layer 21 away from the first corrugated paper layer 20. By providing the hydrophobic and heat-insulating coating 24, the hydrophobic performance is relatively good. The first corrugated paper layer 20 includes a first wavy corrugated paper 22 and a plurality of second wavy corrugated papers 23. The first wavy corrugated paper 22 includes a first crest portion and a first trough portion arranged alternately in sequence. It should be noted that the direction in which the first crest portion and the first trough portion of the first wavy corrugated paper 22 are arranged continuously is the length direction, and the direction perpendicular to the length direction and parallel to the corresponding first crest portion is the width direction.
[0019] Each second corrugated sheet 23 is located on the side of the first corrugated sheet 22 facing the inner paper layer 21 and is arranged at equal intervals along the width direction of the first corrugated sheet 22. Each second corrugated sheet 23 includes alternating second crests and second troughs. The length direction of each second corrugated sheet 23 is the same as that of the first corrugated sheet 22. The second troughs of the same second corrugated sheet 23 correspond one-to-one with the first troughs of the first corrugated sheet 22 and are bonded to each other. The second crests of the same second corrugated sheet 23 are bonded to the first corrugated sheet 22. Each of the first crests of the first corrugated paper 22 is arranged in a corresponding manner and bonded to each other. In this embodiment, each of the first crests of the first corrugated paper 22 is bonded to the side of the face paper layer 10 facing the inner paper layer 21, and each of the second troughs of the same second corrugated paper 23 is bonded to the side of the inner paper layer 21 facing the face paper layer 10. By providing multiple second corrugated papers 23, each second corrugated paper 23 supports the first corrugated paper 22, which greatly improves the strength of the hydrophobic and heat-insulating corrugated paperboard. It should be noted that the spacing between two adjacent second corrugated papers 23 is as small as possible.
[0020] On the side of the first wavy corrugated paper 22 facing the inner paper layer 21, grooves are formed at positions corresponding to the first wave crests. Each second wave crest is located within its corresponding groove. Each second wavy corrugated paper 23 is divided into multiple groups of sequentially arranged corrugated units along the width direction of the first wavy corrugated paper 22. Within the same group of corrugated units, the spacing between each second wave crest located in the same groove and its corresponding first wave crest gradually decreases, increases, or first decreases then increases along the width direction of the first wavy corrugated paper 22. During production, the first wavy corrugated paper 22 is produced using one set of corrugated rollers in the corrugated board production line, and each second wavy corrugated paper 23 is produced using another set of corrugated rollers in the same production line. The corrugated board production line is a conventional corrugated board production line. Each first crest of the paper 22 is sprayed with adhesive and bonded with a face paper layer 10. Each second trough of the second corrugated paper 23 is sprayed with adhesive and bonded with an inner paper layer 21. Then, with the help of a conveyor belt and a traction device, each second corrugated paper 23 and the first corrugated paper 22 are bonded together. Finally, they are flattened, dried and shaped. In this invention, a hydrophobic and heat-insulating coating 24 is provided on the side of the face paper layer 21 away from the first corrugated paper layer 20, which has relatively good hydrophobic properties. In addition, multiple second corrugated papers 23 are provided on the side of the first corrugated paper 22 facing the inner paper layer 21. In the same strip groove, one second crest will block the adjacent second crest, thereby blocking the air flow in the strip groove, reducing heat convection, and playing a heat insulation role. The heat insulation effect is relatively good.
[0021] Preferably, the hydrophobic and thermally insulating coating 24 is made of SiO2 aerogel. During production, a SiO2 aerogel hydrophobic and thermally insulating coating is first prepared using a conventional process. Then, a wire bar coater is used to coat the SiO2 aerogel hydrophobic and thermally insulating coating on the side of the face paper layer 21 away from the first corrugated paper layer 20. The coating is then cured and dried under natural conditions to form the hydrophobic and thermally insulating coating 24. The wet film thickness of the hydrophobic and thermally insulating coating 24 is 40μm-80μm. The wet film thickness of the hydrophobic and thermally insulating coating 24 depends on the type of wire bar coater used. Preferably, experimental data shows that when a 60μm wire bar coater is used to coat the SiO2 aerogel hydrophobic and thermally insulating coating (i.e., the wet film thickness of the hydrophobic and thermally insulating coating 24 is 60μm), the hydrophobic performance is better.
[0022] Preferably, a graphic layer is provided between the face paper layer 10 and the hydrophobic and heat-insulating coating 24. Specifically, before applying the SiO2 aerogel hydrophobic and heat-insulating thermal coating, a graphic layer is printed on the side of the face paper layer 21 away from the first corrugated paper layer 20 to prevent the graphic layer from directly contacting the outside world, which can significantly improve the durability of the graphic layer.
[0023] Preferably, the side of the first corrugated paper 22 facing the face paper layer 10 is bonded with filler through an adhesive layer. In this embodiment, the filler is one or both of long-pile yarn and cotton wool. During production, an adhesive layer is evenly distributed on the side of the first corrugated paper 22 facing the face paper layer 10. The adhesive layer corresponding to each first crest of the first corrugated paper 22 is scraped off with a hard board, or a release paper is placed at the position corresponding to each first crest of the first corrugated paper 22. The adhesive layer is evenly distributed on the side of the first corrugated paper 22 facing the face paper layer 10, and then the release paper is torn off. Then, the long-pile yarn or cotton wool is bonded to the adhesive layer. Finally, each first crest of the first corrugated paper 22 is simultaneously bonded to the face paper layer 10 facing the inner paper layer. On one side of 21, this arrangement effectively prevents long fibers from adhering to the positions of the first crests of the first corrugated paper 22, thereby preventing the first crests of the first corrugated paper 22 from not adhering firmly to the face paper layer 10. Alternatively, a glue gun can be inserted into the cavity formed by the face paper layer 10 and the first corrugated paper 22 to spray the sidewalls between the first crests and the first troughs of the first corrugated paper 22. This eliminates the need to scrape off the adhesive layer corresponding to the first crests of the first corrugated paper 22 with a hardboard. By adhering filler to the side of the first corrugated paper 22 facing the face paper layer 10, the impact energy during collision can be absorbed, further improving the cushioning performance. At the same time, it can also slow down heat convection and play a role in heat insulation.
[0024] Example 2: The difference between this embodiment and Embodiment 1 is that the number of layers in the first corrugated paper layer 20 is different, such as... Figure 3 As shown, specifically, there are two or more first corrugated paper layers 20. In this embodiment, two first corrugated paper layers 20 are used as an example. Each first corrugated paper layer 20 is arranged sequentially along the direction from the face paper layer 10 to the inner paper layer 21, and a spacer is provided between adjacent first corrugated paper layers 20. This arrangement effectively improves the compressive strength. In this embodiment, the first crest of the first wavy corrugated paper 22 in the first corrugated paper layer 20 that is relatively close to the face paper layer 10 is simultaneously bonded to the face paper layer 10 facing the inner paper layer 21. On one side, the second troughs of the second wavy corrugated paper 23 in the first corrugated paper layer 20, which is relatively close to the face paper layer 10, are simultaneously bonded to the side of the partition paper facing the face paper layer 10. The first crest of the first wavy corrugated paper 22 in the first corrugated paper layer 20, which is relatively close to the inner paper layer 21, is simultaneously bonded to the side of the partition paper facing the inner paper layer 21. The second troughs of the second wavy corrugated paper 23 in the first corrugated paper layer 20, which is relatively close to the face paper layer 10, are simultaneously bonded to the side of the inner paper layer 21 facing the partition paper.
[0025] The present invention has been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the above embodiments. Those skilled in the art can make various modifications to the present invention based on the prior art, and these modifications all fall within the protection scope of the present invention.
Claims
1. A hydrophobic and heat-insulating corrugated cardboard, characterized in that, The system includes a face paper layer, a first corrugated paper layer, and a liner paper layer. The first corrugated paper layer is located between the face paper layer and the liner paper layer. A hydrophobic and heat-insulating coating is provided on the side of the face paper layer away from the first corrugated paper layer. The first corrugated paper layer includes a first wavy corrugated paper and a plurality of second wavy corrugated papers. The first wavy corrugated paper includes alternating first crests and first troughs. Each second wavy corrugated paper is located on the side of the first wavy corrugated paper facing the liner paper layer and is equally spaced along the width direction of the first wavy corrugated paper. Each second wavy corrugated paper includes alternating second crests and second troughs. The length direction of each second wavy corrugated paper is the same as the length direction of the first wavy corrugated paper. Each second trough of the same second wavy corrugated paper... Each of the first troughs of the first corrugated paper is arranged in a corresponding manner and bonded to each other. Each of the second crests of the same second corrugated paper is arranged in a corresponding manner and bonded to each of the first crests of the first corrugated paper. On the side of the first corrugated paper facing the inner paper layer, a strip groove is formed at a position corresponding to each of the first crests. Each of the second crests is located in the corresponding strip groove. Each of the second corrugated papers is divided into multiple groups of sequentially arranged corrugated units along the width direction of the first corrugated paper. In the same group of corrugated units, the distance between each of the second crests located in the same strip groove and the corresponding first crest gradually decreases or gradually increases or first gradually decreases and then gradually increases along the width direction of the first corrugated paper.
2. The hydrophobic and heat-insulating corrugated cardboard according to claim 1, characterized in that, The hydrophobic heat-insulating coating is a hydrophobic heat-insulating coating made of SiO2 aerogel.
3. The hydrophobic and heat-insulating corrugated cardboard according to claim 2, characterized in that, The wet film thickness of the hydrophobic heat-insulating coating is 40μm-80μm.
4. The hydrophobic and heat-insulating corrugated cardboard according to claim 1, characterized in that, The first corrugated paper has filler bonded to the side facing the face paper layer via an adhesive layer.
5. The hydrophobic and heat-insulating corrugated cardboard according to claim 4, characterized in that, The filling material is one or both of long-pile yarn and cotton wadding.
6. The hydrophobic and heat-insulating corrugated cardboard according to claim 1, characterized in that, There are two or more first corrugated paper layers, and each first corrugated paper layer is arranged sequentially along the direction from the face paper layer to the inner paper layer, and a partition paper is provided between two adjacent first corrugated paper layers.
7. The hydrophobic and heat-insulating corrugated cardboard according to claim 1, characterized in that, A graphic layer is provided between the face paper layer and the hydrophobic heat-insulating coating.