An environmentally friendly single-sided grey cardboard with good flatness

Abstract

This utility model relates to the technical field of single-layer grey cardboard, and more particularly to an environmentally friendly single-layer grey cardboard with good slab laying effect, including a substrate, the surface of which is provided with a composite mechanism. Through the composite mechanism, this environmentally friendly single-layer grey cardboard with good slab laying effect provides initial support as a basic carrier in practical applications. The glass fiber filaments of the reinforcing layer, with their high strength and high modulus characteristics, effectively disperse and resist external forces such as compression and impact, preventing deformation of the substrate. Conical blocks penetrate the reinforcing layer and are embedded in the moisture-proof layer, forming a mechanical interlocking structure that tightly connects each layer, ensuring that external forces are evenly transmitted to each layer when stressed, avoiding warping and denting caused by interlayer misalignment. In humid environments, the silica gel coating of the moisture-proof layer utilizes a nano-scale porous structure to efficiently block moisture intrusion. Finally, the water-based acrylic resin of the smoothing layer is precisely coated and calendered to fill microscopic defects.

Description

Technical Field

[0001] This utility model relates to the technical field of single-sided grey cardboard, and in particular to an environmentally friendly single-sided grey cardboard with good flatness. Background Technology

[0002] Grey cardboard, as an important packaging material, has become a typical representative of environmentally friendly products due to its characteristic of being made from recycled waste paper. Its application in the market is becoming increasingly widespread, gradually replacing traditional plastic and wood-based materials. Single-layer grey cardboard, as a subcategory of grey cardboard, occupies an important position in packaging, advertising, and other fields due to its cost and performance advantages. Therefore, there is a particular need for an environmentally friendly single-layer grey cardboard with good lay-out properties.

[0003] However, existing environmentally friendly single-sided grey cardboard is prone to warping, wavy deformation, local dents, and other unevenness in large-area flat-lay applications such as large-scale exhibitions and high-end packaging. Utility Model Content

[0004] The purpose of this utility model is to provide an environmentally friendly single-sided grey cardboard with good flatness, in order to solve the problem mentioned in the background art that the existing environmentally friendly single-sided grey cardboard is prone to unevenness such as warping, wavy deformation, and local depressions in large-area flat laying occasions such as large-scale exhibitions and high-end packaging.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an environmentally friendly single-sided gray cardboard with good flatness, comprising a substrate, wherein a composite mechanism is provided on the surface of the substrate;

[0006] The composite structure includes a cone block, a reinforcing layer, a moisture-proof layer, a flame-retardant layer, and a smoothing layer. The cone block is connected to the surface of the substrate, the reinforcing layer is connected to the surface of the substrate, the moisture-proof layer is connected to the surface of the reinforcing layer, the flame-retardant layer is connected to the surface of the moisture-proof layer, and the smoothing layer is connected to the surface of the flame-retardant layer.

[0007] Preferably, the surface of the reinforcing layer is bonded and fixed to the cone block, and the reinforcing layer is made of glass fiber filaments.

[0008] Preferably, the surface of the moisture-proof layer is bonded and fixed to the reinforcing layer, and the moisture-proof layer is made of silica gel coating.

[0009] Preferably, the surface of the flame-retardant layer is bonded and fixed to the moisture-proof layer, and the flame-retardant layer is a halogen-free flame-retardant coating layer.

[0010] Preferably, the surface of the smooth layer is bonded and fixed to the flame retardant layer, and the smooth layer is made of water-based acrylic resin.

[0011] Preferably, one end of the cone is connected through the reinforcing layer, and one end of the cone is embedded inside the moisture-proof layer.

[0012] Compared with existing technologies, the beneficial effects of this utility model are as follows: This environmentally friendly single-gray cardboard with good flatness enhances structural strength through a glass fiber reinforcement layer and a cone-block mechanical interlocking structure that evenly transmits external forces, preventing deformation and warping from a mechanical perspective. The silica gel moisture-proof layer isolates moisture, and the halogen-free flame-retardant layer resists high temperatures, avoiding deformation caused by environmental factors. Combined with a water-based acrylic resin smoothing layer to fill microscopic defects, the synergistic effect of multiple structures enables the cardboard to maintain excellent flatness and smoothness under complex environments such as external pressure, humidity, and high temperature. It effectively solves the problems of traditional cardboard being prone to dents, bending, and deformation due to moisture, significantly improving the packaging aesthetics, printability, and durability, and meeting the stringent flatness requirements of high-end packaging and advertising displays. Attached Figure Description

[0013] Figure 1 This is a side view of the appearance structure of this utility model;

[0014] Figure 2 This is an exploded view of the composite mechanism of this utility model;

[0015] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0016] In the figure: 1. Substrate; 2. Composite structure; 201. Conical block; 202. Reinforcing layer; 203. Moisture-proof layer; 204. Flame-retardant layer; 205. Smoothing layer. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-3 This utility model provides a technical solution: an environmentally friendly single-gray cardboard with good flatness, including a substrate 1, and a composite mechanism 2 is provided on the surface of the substrate 1;

[0019] Composite structure 2 includes a cone block 201, a reinforcing layer 202, a moisture-proof layer 203, a flame-retardant layer 204, and a smoothing layer 205. The cone block 201 is connected to the surface of substrate 1, the reinforcing layer 202 is connected to the surface of substrate 1, the moisture-proof layer 203 is connected to the surface of the reinforcing layer 202, the flame-retardant layer 204 is connected to the surface of the moisture-proof layer 203, and the smoothing layer 205 is connected to the surface of the flame-retardant layer 204. In practical applications, the environmentally friendly composite single-layer grey cardboard uses substrate 1 as a basic carrier to provide initial support. The glass fiber filaments of the reinforcing layer 202, with their high strength and high modulus, effectively disperse and resist external forces such as compression and impact, preventing deformation of substrate 1. The cone block 201 penetrates the reinforcing layer 202 and is embedded in the moisture-proof layer 203, forming a mechanical interlocking structure that tightly connects the layers, ensuring... When subjected to force, the external force can be evenly transmitted to each layer, avoiding warping and denting caused by interlayer misalignment, thus ensuring the flatness of the cardboard from a structural perspective. In humid environments, the silica gel coating of the moisture-proof layer 203 utilizes a nano-porous structure to effectively block moisture intrusion, preventing the substrate 1 and the reinforcing layer 202 from deforming due to softening and expansion caused by moisture. If exposed to a fire source, the halogen-free flame-retardant coating of the flame-retardant layer 204 quickly absorbs heat and decomposes, releasing inert gas to inhibit combustion, reducing the damage of high temperature to the cardboard structure, and avoiding the impact of heat deformation on flatness. Finally, the water-based acrylic resin of the smoothing layer 205 is precisely coated and calendered to fill microscopic unevenness defects, further optimizing the flatness of the cardboard from the surface. The synergistic effect of multiple structures ensures that the cardboard maintains excellent flatness in various complex environments.

[0020] Furthermore, the surface of the reinforcing layer 202 is bonded and fixed to the cone block 201, and the reinforcing layer 202 is made of glass fiber filaments.

[0021] Furthermore, the surface of the moisture-proof layer 203 is bonded and fixed to the reinforcing layer 202. The moisture-proof layer 203 adopts a silica gel coating. Through the setting of the moisture-proof layer 203, its nano-scale pore structure can form a molecular-level water vapor barrier during use. In high-humidity storage or cold chain transportation environments, it can effectively prevent external moisture from penetrating into the interior of the cardboard. At the same time, the adsorption characteristics of the gel coating can balance the internal humidity, prevent the fiber expansion and strength reduction of the substrate 1 and the reinforcing layer 202 due to moisture penetration, and avoid wavy deformation and flatness failure caused by moisture.

[0022] Furthermore, the surface of the flame retardant layer 204 is bonded and fixed to the moisture-proof layer 203. The flame retardant layer 204 is a halogen-free flame retardant coating layer. With the setting of the flame retardant layer 204, when exposed to open flame or high temperature environment during use, the flame retardant coating will quickly undergo an endothermic decomposition reaction, release inert gas to dilute the oxygen concentration, and at the same time form a heat-insulating carbonized layer on the surface of the cardboard to prevent the spread of flames and reduce the softening and twisting of the cardboard structure caused by the high temperature generated by combustion. This ensures safety in use and maintains the shape integrity of the cardboard in fire scenarios, avoiding thermal deformation that affects flatness.

[0023] Furthermore, the surface of the smooth layer 205 is bonded and fixed to the flame retardant layer 204. The smooth layer 205 is made of water-based acrylic resin. Through the setting of the smooth layer 205, when in use, the smooth layer 205 made of water-based acrylic resin can fill the micro-uneven defects on the surface of the paperboard after multi-stage calendering treatment, forming a mirror-level smooth surface. During the printing process, it ensures that the ink is evenly adhered and the pattern is clearly presented, avoiding blurry graphics or color deviation caused by uneven surface. At the same time, the wear resistance of the resin coating can resist friction and scratches, prevent scratches and dents from forming on the surface, and continuously maintain the flat and beautiful appearance of the paperboard.

[0024] Furthermore, one end of the cone 201 is connected through the reinforcing layer 202, and the other end of the cone 201 is embedded inside the moisture-proof layer 203. Through the setting of the cone 201, during use, the three-dimensional mechanical interlocking structure of the cone 201 can tightly anchor the substrate 1, the reinforcing layer 202 and the moisture-proof layer 203. When the cardboard is subjected to shear force or interlayer stress, the cone 201 effectively restricts the relative displacement of each layer. By uniformly transmitting the external force to the entire composite structure, it avoids interlayer peeling or warping caused by local stress concentration, and strengthens the overall rigidity and flatness maintenance ability of the cardboard from a mechanical perspective.

[0025] Working Principle: In practical applications, the environmentally friendly composite single-layer grey cardboard uses substrate 1 as the basic carrier to provide initial support. The glass fiber filaments of the reinforcing layer 202, with their high strength and high modulus, effectively disperse and resist external forces such as compression and impact, preventing deformation of substrate 1. The cone block 201 penetrates the reinforcing layer 202 and is embedded in the moisture-proof layer 203, forming a mechanical interlocking structure that tightly connects each layer. This ensures that external forces are evenly transmitted to each layer when under stress, avoiding warping and denting caused by interlayer misalignment. Structurally, this ensures the flatness of the cardboard. In humid environments, the silica in the moisture-proof layer 203 condenses... The adhesive coating utilizes a nanoscale porous structure to effectively block moisture intrusion, preventing the substrate 1 and reinforcing layer 202 from deforming due to softening and expansion caused by moisture. If exposed to a fire source, the halogen-free flame-retardant coating of the flame-retardant layer 204 quickly absorbs heat and decomposes, releasing inert gases to inhibit combustion, reducing the damage of high temperature to the cardboard structure, and avoiding the impact of heat deformation on flatness. Finally, the water-based acrylic resin of the smoothing layer 205 is precisely coated and calendered to fill microscopic unevenness defects, further optimizing the flatness of the cardboard from the surface. The synergistic effect of multiple structures enables the cardboard to maintain excellent flatness in various complex environments.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly single-kraft paperboard with good laying flat, comprising a base board (1), characterized in that: The surface of the substrate (1) is provided with a composite mechanism (2); The composite structure (2) includes a cone block (201), a reinforcing layer (202), a moisture-proof layer (203), a flame-retardant layer (204), and a smoothing layer (205). The cone block (201) is connected to the surface of the substrate (1), the reinforcing layer (202) is connected to the surface of the substrate (1), the moisture-proof layer (203) is connected to the surface of the reinforcing layer (202), the flame-retardant layer (204) is connected to the surface of the moisture-proof layer (203), and the smoothing layer (205) is connected to the surface of the flame-retardant layer (204).

2. The environmentally friendly single-kraft paperboard with good laying flat property according to claim 1, characterized in that: The surface of the reinforcing layer (202) is bonded and fixed to the cone block (201), and the reinforcing layer (202) is made of glass fiber filaments.

3. The environmentally friendly single-kraft paperboard with good laying flat property according to claim 1, characterized in that: The surface of the moisture-proof layer (203) is bonded and fixed to the reinforcing layer (202), and the moisture-proof layer (203) is made of silica gel coating.

4. The environmentally friendly single-kraft paperboard with good laying flat property according to claim 1, characterized in that: The surface of the flame retardant layer (204) is bonded and fixed to the moisture-proof layer (203), and the flame retardant layer (204) is a halogen-free flame retardant coating layer.

5. The environmentally friendly single-kraft paperboard with good laying flat property according to claim 1, characterized in that: The surface of the smooth layer (205) is bonded and fixed to the flame retardant layer (204), and the smooth layer (205) is made of water-based acrylic resin.

6. The environmentally friendly single-kraft paperboard with good laying flat property according to claim 1, characterized in that: One end of the cone (201) is connected through the reinforcing layer (202), and the other end of the cone (201) is embedded inside the moisture-proof layer (203).

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