corrugated cardboard

Abstract

This utility model discloses a corrugated cardboard in the field of product packaging technology. The corrugated cardboard comprises a face paper, a liner paper, and a corrugated core paper. The corrugated core paper is corrugated and fixedly connected between the face paper and the liner paper. Multiple through-holes are formed on the side of the liner paper away from the corrugated core paper, and the extending direction of the through-holes is consistent with the extending direction of the holes formed by the corrugated core paper and the liner paper. The through-holes on the side of the liner paper away from the corrugated core paper facilitate air circulation, allow moisture inside the cardboard to escape, creating a relatively stable environment and preventing mold growth.

Description

Technical Field

[0001] This utility model relates to the field of product packaging technology, specifically to a corrugated cardboard. Background Technology

[0002] Corrugated cardboard is a composite paperboard made through an adhesive bonding process. It typically consists of a face liner and a linerboard, with a corrugated core layer fixed between them. This unique three-layer structure gives corrugated cardboard superior strength and cushioning performance compared to ordinary paperboard. With its high strength, lightweight, and excellent compression resistance and cushioning, corrugated cardboard has become a key component of modern packaging solutions, ensuring the safety and integrity of products from the production line to the consumer.

[0003] In existing technologies, corrugated cardboard itself contains a certain amount of moisture. When used for wine boxes, some water will remain in the boxes during the filling process. Water contact with corrugated cardboard can easily lead to mold growth. Therefore, the mold-resistant properties of corrugated cardboard in existing technologies need to be improved.

[0004] Furthermore, since corrugated cardboard is used to protect goods, existing technologies require it to have good anti-mold and antibacterial properties to prevent the packaged products from being damaged by moisture. By enhancing the anti-mold and antibacterial properties of corrugated cardboard, the safety and reliability of packaging can be significantly improved, thereby better meeting market demands and consumer expectations. Utility Model Content

[0005] To overcome the problem that existing corrugated cardboard is prone to mold growth when exposed to water, this utility model provides a corrugated cardboard.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] Corrugated cardboard includes face paper, liner paper, and corrugated core paper. The corrugated core paper is wavy and is fixedly connected between the face paper and the liner paper. Multiple through holes are opened on the side of the liner paper away from the corrugated core paper. The extension direction of the through holes is consistent with the extension direction of the holes formed by the corrugated core paper and the liner paper.

[0008] In this application, through holes are made on the side of the inner paper away from the corrugated core paper, which facilitates air circulation, allows moisture inside the cardboard to escape, creates a relatively stable environment, and prevents mold growth.

[0009] In some embodiments, a plurality of trapezoidal through holes are formed on the side of the inner paper away from the corrugated core paper, and the extending direction of the trapezoidal through holes is consistent with the extending direction of the holes formed by the corrugated core paper and the inner paper.

[0010] In some embodiments, on the cross-section of the trapezoidal through-hole, the upper base is located on the side away from the corrugated core paper relative to the lower base.

[0011] In some embodiments, a plurality of trapezoidal through holes are arranged linearly, with the arrangement direction perpendicular to the through hole extension direction.

[0012] In some embodiments, the dimensions of the upper and lower bases of the trapezoidal through hole are between 0.1mm and 0.2mm in cross-section, and the height is 1 / 3 to 1 / 2 of the thickness of the inner paper.

[0013] In some embodiments, the side of the inner liner away from the corrugated core is coated with an anti-mildew varnish.

[0014] In some embodiments, the side of the face paper away from the corrugated core paper is coated with a hydrophobic layer.

[0015] The beneficial effects of this utility model are:

[0016] Opening through holes on the side of the inner liner away from the corrugated core paper facilitates air circulation, allows moisture inside the cardboard to escape, creates a relatively stable environment, and prevents mold growth. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of the corrugated cardboard provided by this utility model;

[0018] Figure 2 A partially enlarged view of the corrugated cardboard provided by this utility model;

[0019] Figure 3 for Figure 1 A schematic diagram of the structure of the middle linerboard;

[0020] Figure 4 for Figure 1 A schematic diagram of the structure of the inner and outer paper.

[0021] The markings in the diagram are: 1. Face paper; 2. Inner paper; 3. Corrugated core paper; 4. Trapezoidal through-holes; 5. Anti-mildew varnish; 6. Hydrophobic layer. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0024] like Figure 1-4 As shown, this utility model provides a corrugated cardboard.

[0025] Corrugated cardboard includes a face paper 1, a liner paper 2, and a corrugated core paper 3. The corrugated core paper 3 is wavy and is fixedly connected between the face paper 1 and the liner paper 2. Multiple through holes are opened on the side of the liner paper 2 away from the corrugated core paper 3. The extension direction of the through holes is consistent with the extension direction of the holes formed by the corrugated core paper 3 and the liner paper 2.

[0026] In this application, through holes are made on the side of the inner paper 2 away from the corrugated core paper 3, which is conducive to air circulation, facilitates the discharge of moisture inside the cardboard, forms a relatively stable environment, and avoids mold growth.

[0027] In this embodiment, the face paper 1 is made of corrugated base paper, and the inner paper 2 is made of corrugated base paper or with a basis weight of 240g / m³. 2 The following materials are commonly used to make the inner paper 2. The corrugated core paper 3 is made of cardboard. When the three are glued together, they become stronger and less prone to bending.

[0028] In this embodiment, multiple trapezoidal through holes 4 are opened on the side of the inner paper 2 away from the corrugated core paper 3. The extending direction of the trapezoidal through holes 4 is consistent with the extending direction of the hole formed by the corrugated core paper 3 and the inner paper 2.

[0029] The trapezoidal through-hole 4 is configured so that the upper and lower bases of the trapezoid are of different lengths, and the air will not flow straight up and down after the hole is opened, thus blocking the external moisture. The sloping side of the trapezoid helps to guide the airflow, the larger bottom opening is conducive to ventilation, and the smaller top opening can block moisture to a certain extent.

[0030] In this embodiment, on the cross-section of the trapezoidal through hole 4, the upper bottom is located on the side away from the corrugated core paper 3 relative to the lower bottom.

[0031] The difference between the top and bottom soles here is that the top sole is shorter than the bottom sole. From a ventilation and moisture-proofing perspective, the top sole is closer to the outside, while the bottom sole is closer to the inside of the cardboard, which is more conducive to guiding air in during ventilation, and the larger bottom sole can create a larger air circulation space inside.

[0032] In this embodiment, multiple trapezoidal through holes 4 are arranged linearly, and the arrangement direction is perpendicular to the extension direction of the trapezoidal through holes 4.

[0033] Figure 2 Only one trapezoidal through-hole 4 is shown in the figure, serving as an example to illustrate its shape and distribution. In practice, the trapezoidal through-holes 4 are arranged linearly in a direction perpendicular to the hole formed by the corrugated core paper 3 and the inner paper 2, and multiple through-holes are evenly distributed.

[0034] In this embodiment, the dimensions of the upper and lower bases of the trapezoidal through hole 4 are between 0.1mm and 0.2mm, and the height is 1 / 3 to 1 / 2 of the thickness of the inner paper 2.

[0035] The trapezoidal through-hole 4 provided above serves both as ventilation and as a barrier to prevent external moisture from entering.

[0036] In this embodiment, the side of the inner paper 2 away from the corrugated core paper 3 is coated with anti-mildew varnish 5.

[0037] The main component of the anti-mildew varnish 5 here is 1-(methoxy-carbamoyl)-benzimidazole 7. The function of anti-mildew varnish 5 is to prevent the growth and erosion of mold.

[0038] Specifically, in this embodiment, the side of the inner paper 2 away from the corrugated core paper 3 is coated with anti-mildew varnish 5 using microencapsulation technology. The anti-mildew varnish 5 is incorporated into the acrylic emulsion during coating. The microencapsulation technology enables the anti-mildew varnish 5 to achieve a slow-release effect. During the coating process, the emulsion carries the anti-mildew varnish 5 into the trapezoidal through-holes 4. After drying, some of the anti-mildew varnish 5 remains in the trapezoidal through-holes 4, which act as a protective barrier, preventing the anti-mildew varnish 5 from being lost due to external friction, scratches, or other factors, thus ensuring its continued anti-mildew effect.

[0039] In this embodiment, a hydrophobic layer 6 is coated on the side of the face paper 1 away from the corrugated core paper 3.

[0040] The hydrophobic layer 6 is provided above to effectively prevent moisture from penetrating into the interior of the cardboard, thus preventing the cardboard from softening, deforming, or even being damaged due to moisture absorption.

[0041] The hydrophobic layer 6 contains nano-titanium dioxide photocatalyst. Under light irradiation, the nano-titanium dioxide photocatalyst generates highly oxidizing free radicals, which not only decompose organic pollutants in the air, purifying the air, but also further inhibit mold growth. Simultaneously, the nano-titanium dioxide photocatalyst is superhydrophilic, allowing water droplets to spread rapidly on the surface, preventing water droplet accumulation and further enhancing waterproof performance.

[0042] The inner liner 2 undergoes a special perforation treatment on its side away from the corrugated core 3, forming a neatly arranged trapezoidal through-hole structure 4. These micropores not only facilitate air circulation but also effectively block the intrusion of external moisture, creating a relatively stable environment inside the cardboard. To further enhance the performance of the cardboard, a functional coating is incorporated into the design: an anti-mildew varnish 5 is applied to the side of the inner liner 2 away from the corrugated core 3, enhancing its anti-mildew ability. For the outer liner 1, a special adhesive containing moisture-absorbing components is used for bonding on its side close to the corrugated core 3, effectively absorbing excess moisture inside the cardboard; a hydrophobic layer 6 is coated on its side away from the corrugated core 3 to prevent external moisture from entering the cardboard. Through this unique structural design and multi-layer coating technology, the cardboard of this invention not only possesses excellent ventilation and humidity management capabilities but also significantly improves its anti-mildew and antibacterial effects, providing a safe and dry storage environment for products.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A corrugated cardboard comprising a face paper (1), a liner paper (2), and a corrugated core paper (3), wherein the corrugated core paper (3) is wavy and fixedly connected between the face paper (1) and the liner paper (2), characterized in that: Multiple through holes are made on the side of the inner paper (2) away from the corrugated core paper (3), and the extension direction of the through holes is consistent with the extension direction of the holes formed by the corrugated core paper (3) and the inner paper (2).

2. The corrugated cardboard as described in claim 1, characterized in that: in Multiple trapezoidal through holes (4) are opened on the side of the inner paper (2) away from the corrugated core paper (3). The extension direction of the trapezoidal through holes (4) is consistent with the extension direction of the hole formed by the corrugated core paper (3) and the inner paper (2).

3. The corrugated cardboard as described in claim 2, characterized in that: In the cross-section of the trapezoidal through hole (4), the upper base is located on the side away from the corrugated core paper (3) relative to the lower base.

4. The corrugated cardboard as described in claim 2, characterized in that: Multiple trapezoidal through holes (4) are arranged linearly, with the arrangement direction perpendicular to the extension direction of the through holes.

5. The corrugated cardboard as described in claim 2, characterized in that: On the cross-section of the trapezoidal through hole (4), the dimensions of the upper and lower bases are between 0.1mm and 0.2mm, and the height is 1 / 3 to 1 / 2 of the thickness of the inner paper (2).

6. The corrugated cardboard as described in claim 1, characterized in that: The side of the inner paper (2) away from the corrugated core paper (3) is coated with anti-mildew varnish (5).

7. The corrugated cardboard as described in any one of claims 1-6, characterized in that: A hydrophobic layer (7) is coated on the side of the face paper (1) away from the corrugated core paper (3).

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