Laminated paper with good hydrophobicity

Abstract

The utility model discloses coated paper with good hydrophobicity, which belongs to the technical field of coated paper and comprises coated paper and a hydrophobic layer, the hydrophobic layer, a waterproof layer, a cementing layer, a buffer layer and a base paper layer are arranged in the coated paper, grooves are arranged at the edges of four ends of the coated paper, first side glue is filled in the groove positioned in the Y direction, and second side glue is filled in the groove positioned in the Y direction. The grooves in the X direction are filled with second side glue, the hydrophobic layer, the waterproof layer, the cementing layer, the buffer layer and the base paper layer are fixed in an ultrasonic welding mode, and the thicknesses of the hydrophobic layer, the waterproof layer, the cementing layer, the buffer layer and the base paper layer are 0.06 mm; the edge of the coated paper is sealed by arranging the first side glue and the second side glue, so that the service life of the coated paper is long, the edge of the coated paper is not easy to permeate due to long-term contact with water, and the edge of the coated paper is not easy to gradually permeate from the edge to the center to crack.

Description

Technical Field

[0001] This utility model relates to the field of coated paper technology, and in particular to a coated paper with good hydrophobicity. Background Technology

[0002] Coated paper is a composite material in which plastic particles are coated onto the surface of paper using a casting machine. Its main characteristics are that this composite material is oil-proof, waterproof, and heat-sealing. It is mainly used in packaging materials, label printing, and outdoor advertising.

[0003] A search revealed that Chinese Patent Publication No. CN221855142U discloses a hydrophobic coated paper, comprising a coated paper body with a multi-layer structure, including: a base paper layer; at least one protective layer covering the upper and / or lower surface of the base paper layer; and a hydrophobic layer covering the upper and lower surfaces of the protective layer. This design solves the problem of poor hydrophobicity by first using a hydrophobic film for hydrophobicity; even if the hydrophobic film is broken or damaged, moisture can still be absorbed through the permeable micropores and the absorbent layer, thus improving the hydrophobic performance of the coated paper body.

[0004] Meanwhile, Chinese Patent Publication No. CN222613861U discloses a hydrophobic coated paper, comprising a coated paper body, a base paper layer, and a coated layer covering the surface of the base paper layer. A first hydrophobic layer is fixedly coated on the surface of the coated layer, a second hydrophobic layer is sprayed onto the surface of the first hydrophobic layer, and a third hydrophobic layer is fixedly coated on the surface of the second hydrophobic layer. This hydrophobic coated paper, with its first, second, and third hydrophobic layers combined to form a hydrophobic reinforcement structure, enhances the waterproof performance of the coated paper body. When used as a paper bag or box, it effectively waterproofs the contents, making it more suitable for packaging items susceptible to moisture damage.

[0005] However, in the existing technology, although the hydrophobic function can be achieved, the service life of the coated paper is poor. The edges of the coated paper are prone to water penetration due to long-term contact with water, and cracks are easily formed from the edges to the center.

[0006] Therefore, we propose a hydrophobic coated paper to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by proposing a hydrophobic coated paper.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A hydrophobic coated paper, comprising the coated paper and further comprising:

[0010] The coated paper contains a hydrophobic layer, a waterproof layer, an adhesive layer, a buffer layer, and a base paper layer. The coated paper has grooves at its four edges. The grooves in the width direction of the coated paper are filled with a first side adhesive, and the grooves in the length direction of the coated paper are filled with a second side adhesive.

[0011] More preferably, the hydrophobic layer, waterproof layer, adhesive layer, buffer layer, and base paper layer are fixed by ultrasonic welding, and the thickness of the hydrophobic layer, waterproof layer, adhesive layer, buffer layer, and base paper layer is 0.06 mm.

[0012] More preferably, the hydrophobic layer, waterproof layer, adhesive layer, buffer layer and base paper layer are evenly arranged from top to bottom along the height direction of the coated paper, and the hydrophobic layer, waterproof layer, adhesive layer, buffer layer and base paper layer have the same shape along the horizontal direction of the coated paper.

[0013] More preferably, the cross-sections of the hydrophobic layer, waterproof layer, adhesive layer, buffer layer, and base paper layer along the height direction of the coated paper are all trapezoidal, and the cross-sections of the first side adhesive and the second side adhesive along the height direction of the coated paper are both right-angled triangular.

[0014] More preferably, the length of the side edge of the coated paper in the X direction is greater than the length of the side edge of the coated paper in the Y direction, and the edges of the first side adhesive and the second side adhesive are flush with the coated paper.

[0015] More preferably, a coating layer is provided at the top of the hydrophobic layer, and the coating layer is applied by spraying to cover the top of the hydrophobic layer, and the cross-section of the coating layer along the height direction of the coated paper is arc-shaped.

[0016] More preferably, the top surface of the coating layer is a rough surface, the coating layer is a glass surface layer, and the coating layer thickness is 0.02 mm.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] By setting the first and second side adhesives to seal the edges of the coated paper, the coated paper has a long service life. The edges of the coated paper are not easily penetrated by water due to long-term contact, and it is not easy for the water to gradually seep in and crack from the edges to the center. Attached Figure Description

[0019] Figure 1 This is a structural diagram of a hydrophobic coated paper proposed in this utility model;

[0020] Figure 2 An exploded view of a hydrophobic coated paper proposed in this utility model;

[0021] Figure 3 for Figure 1 Exploded view of the side structure in the Y direction;

[0022] Figure 4 for Figure 1 Schematic diagram of the side structure in the X direction.

[0023] In the diagram: 1. Coated paper; 2. Hydrophobic layer; 3. Waterproof layer; 4. Adhesive layer; 5. Buffer layer; 6. Base paper layer; 7. Coating layer; 8. First side adhesive; 9. Second side adhesive; 10. Groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] refer to Figure 1 A hydrophobic coated paper 1 includes a coated paper 1, which is a composite material in which plastic particles are coated onto the surface of paper by a casting machine. The commonly used plastic particles are polyethylene, which has good hydrophobicity and oil resistance. This has been pointed out in the prior art of Chinese Patent Publication No. CN221855142U, and will not be elaborated further here.

[0026] refer to Figure 1 and Figure 2 The hydrophobic layer 2 is mainly made of polyethylene. Polyethylene has good heat resistance and corrosion resistance. The hydrophobic layer 2 made of polyethylene can be used in a variety of scenarios. The specific process of installing the hydrophobic layer 2 on the coated paper 1 is to first roll the hydrophobic layer 2 onto the other coatings by roller pressing, and finally use ultrasonic welding to make the hydrophobic layer 2 tightly bonded to the other coatings, thereby improving the hydrophobic effect and stability of the hydrophobic layer 2.

[0027] refer to Figures 3-4 The coated paper 1 has a hydrophobic layer 2 inside, the main function of which is to provide outermost hydrophobic treatment. The waterproof layer 3 mainly serves as secondary waterproofing after the hydrophobic layer 2. The adhesive layer 4 is mainly used to bond and fix the waterproof layer 3 and the buffer layer 5, providing a connection and fixation. The buffer layer 5 mainly provides effective buffering on the outside of the base paper layer 6. The function of the base paper layer 6 has already been pointed out in the prior art of CN221855142U, and will not be elaborated further here.

[0028] refer to Figure 3 and Figure 4The coated paper 1 has grooves 10 at its four edges. The first side adhesive 8 and the second side adhesive 9 are accommodated by the grooves 10, so that the first side adhesive 8 and the second side adhesive 9 are completely accommodated in the grooves 10. The groove 10 in the Y direction is filled with the first side adhesive 8, and the groove 10 in the X direction is filled with the second side adhesive 9. The first side adhesive 8 and the second side adhesive 9 are preferably nano-silicone waterproof adhesives, which have excellent penetrating crystallization waterproof performance and high elasticity coating waterproof performance of acrylic polymer waterproof emulsion.

[0029] refer to Figure 3 and Figure 4 By setting the first side adhesive 8 and the second side adhesive 9 to seal the edge of the coated paper 1, the coated paper 1 has a long service life. The edge of the coated paper 1 is not easy to penetrate due to long-term contact with water, and it is not easy to gradually penetrate and crack from the edge to the center.

[0030] refer to Figure 1 and Figure 3 The hydrophobic layer 2, waterproof layer 3, adhesive layer 4, buffer layer 5, and base paper layer 6 are fixed by ultrasonic welding. Ultrasonic welding can complete the welding process in a very short time, usually within a few milliseconds, which greatly shortens the processing time and improves production efficiency. During ultrasonic welding, energy is concentrated and only consumed in the precise area that needs to be welded. This efficient energy utilization method makes the welding process more economical and precise. The thickness of the hydrophobic layer 2, waterproof layer 3, adhesive layer 4, buffer layer 5, and base paper layer 6 is 0.06mm, which makes the coated paper 1 thinner and lighter without affecting the hydrophobic properties of the coated paper 1.

[0031] refer to Figure 1 and Figure 2 Along the height direction of the coated paper 1, from top to bottom, there are a hydrophobic layer 2, a waterproof layer 3, an adhesive layer 4, a buffer layer 5, and a base paper layer 6, which are evenly arranged. The hydrophobic layer 2, the waterproof layer 3, the adhesive layer 4, the buffer layer 5, and the base paper layer 6 have the same shape along the horizontal direction of the coated paper 1. This arrangement makes the coated paper 1 more robust and stable when subjected to external pressure, and it is not easy to be damaged from a certain point on the coated paper 1, thus improving the durability of the coated paper 1.

[0032] refer to Figure 3 and Figure 4 The cross-sections of the hydrophobic layer 2, waterproof layer 3, adhesive layer 4, buffer layer 5, and base paper layer 6 along the height direction of the coated paper 1 are all trapezoidal in shape. The two sides of the trapezoidal shape can form embedded grooves 10, which can effectively accommodate the first side adhesive 8 and the second side adhesive 9. The cross-sections of the first side adhesive 8 and the second side adhesive 9 along the height direction of the coated paper 1 are all right-angled triangles, and right-angled triangles have good stability.

[0033] refer to Figure 3 and Figure 4 The length of the side X direction of the coated paper 1 is greater than the length of the side Y direction of the coated paper 1, so that the coated paper 1 is in the shape of a cuboid, which is convenient for subsequent cutting. The edges of the first side adhesive 8 and the second side adhesive 9 are flush with the coated paper 1, so that the first side adhesive 8 and the second side adhesive 9 are not easily detached by external forces.

[0034] refer to Figure 2 and Figure 3 The top of the hydrophobic layer 2 is provided with a coating layer 7, which is a glass coating. The coating layer 7 can make water droplets form a spherical shape on the glass surface, thereby reducing the contact area between the water droplets and the glass and achieving a waterproof effect. This characteristic is mainly achieved by forming a coating with ultra-low surface energy on the glass surface. The coating layer 7 is applied to the top of the hydrophobic layer 2 by spraying, so that it can completely cover one side of the hydrophobic layer 2. The cross-section of the coating layer 7 along the height direction of the coating paper 1 is arc-shaped, so that the coating layer 7 is recessed and embedded in the hydrophobic layer 2 without occupying much space.

[0035] refer to Figure 2 and Figure 3 The top surface of coating layer 7 is a rough surface. The key to making the glass coating rough surface is to construct a micro-rough structure and use low surface energy materials. Taking lotus leaves as an example, the surface of lotus leaves is covered with papillary structures with a diameter of 5-15 micrometers. Each papillary structure has nanoscale wax crystals growing on it. This multi-level rough surface reduces the actual contact area to only 2-3%. Combined with hydrophobic epidermal wax, the water droplet contact angle reaches more than 160°, thereby achieving a superhydrophobic effect. Coating layer 7 is a glass surface layer with a thickness of 0.02 mm, which can reduce the overall space occupied.

[0036] refer to Figures 1-4 The specific installation process of the coated paper 1 is as follows: First, the hydrophobic layer 2, waterproof layer 3, adhesive layer 4, buffer layer 5 and base paper layer 6 are connected and fixed by applying waterproof adhesive. Then, the hydrophobic layer 2, waterproof layer 3, adhesive layer 4, buffer layer 5 and base paper layer 6 are fixed together by ultrasonic welding. Then, the coating layer 7 is applied to the outside of the hydrophobic layer 2 by spraying waterproof adhesive. Finally, the waterproof adhesive is evenly applied to the groove 10 on the coated paper 1.

[0037] Furthermore, when the terms "first," "second," "third," etc., are used in this application specification to describe various features, these terms are only used to distinguish these features and should not be construed as indicating or implying the correlation or relative importance between features or implicitly indicating the number of features indicated.

[0038] In addition, this application specification describes exemplary embodiments by referring to idealized exemplary cross-sectional views and / or plan views and / or perspective views. Therefore, differences from the illustrated shapes are foreseeable due to factors such as manufacturing techniques and / or tolerances. Therefore, exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but should include deviations in shape caused, for example, by manufacturing processes. Thus, the regions shown in the figures are substantially schematic, and their shapes are not intended to illustrate the actual shapes of the regions of the device, nor are they intended to limit the scope of the exemplary embodiments.

Claims

1. A hydrophobic coated paper, comprising a coated paper, characterized in that, Also includes: The coated paper contains a hydrophobic layer, a waterproof layer, an adhesive layer, a buffer layer, and a base paper layer. The coated paper has grooves at its four edges. The grooves in the width direction of the coated paper are filled with a first side adhesive, and the grooves in the length direction of the coated paper are filled with a second side adhesive.

2. The hydrophobic coated paper according to claim 1, characterized in that, The hydrophobic layer, waterproof layer, adhesive layer, buffer layer, and base paper layer are fixed by ultrasonic welding, and the thickness of each layer is 0.06 mm.

3. The hydrophobic coated paper according to claim 1, characterized in that, The hydrophobic layer, waterproof layer, adhesive layer, buffer layer and base paper layer are evenly arranged from top to bottom along the height direction of the coated paper. The hydrophobic layer, waterproof layer, adhesive layer, buffer layer and base paper layer have the same shape along the horizontal direction of the coated paper.

4. The hydrophobic coated paper according to claim 1, characterized in that, The hydrophobic layer, waterproof layer, adhesive layer, buffer layer, and base paper layer all have trapezoidal cross-sections along the height direction of the coated paper, and the first side adhesive and the second side adhesive both have right-angled triangular cross-sections along the height direction of the coated paper.

5. The hydrophobic coated paper according to claim 1, characterized in that, The length of the side edge of the coated paper in the X direction is greater than the length of the side edge in the Y direction, and the edges of the first side adhesive and the second side adhesive are flush with the coated paper.

6. The hydrophobic coated paper according to claim 1, characterized in that, The top of the hydrophobic layer is provided with a coating layer, which is applied by spraying to cover the top of the hydrophobic layer. The cross-section of the coating layer along the height direction of the coated paper is arc-shaped.

7. The hydrophobic coated paper according to claim 6, characterized in that, The top surface of the coating layer is a rough surface, the coating layer is a glass surface layer, and the coating layer thickness is 0.02 mm.

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