PE-coated paper for easy recycling and separation

Abstract

The utility model belongs to the technical field of coated paper, concretely relates to a PE coated paper convenient to recycle and separate, including paper layer and PE coated layer, still include separating layer, the separating layer is polyethylene water -soluble film of thickness at 3 8um, and set between paper layer and PE coated layer, the separating layer carries out physical adsorption type weak combination with the upper surface of paper layer and the lower surface of PE coated layer respectively through the surface tension and molecular characteristics of material, in the utility model, since separating layer is polyethylene water -soluble film, separating layer dissolves when meeting water, realizes PE coated layer and paper layer natural separation, need not high temperature or chemical treatment, reduce energy consumption and pollution, realize resource recycling.

Description

Technical Field

[0001] This utility model belongs to the field of coated paper technology, specifically relating to a PE coated paper that is easy to recycle and separate. Background Technology

[0002] PE coated paper is waterproof and oil-resistant, and is widely used in food packaging, express delivery bags, shopping bags and other fields. Its core components are base paper and PE coating layer (polyethylene). Both of these raw materials are valuable resources. If waste PE coated paper is discarded directly, it will lead to the waste of these two valuable resources. At the same time, PE material is not easy to degrade naturally, which will occupy a lot of land resources and cause environmental pollution. Therefore, it is necessary to recycle used PE coated paper so that both can be put back into the production chain, such as paper recycling and PE melt granulation, to achieve resource recycling and reduce dependence on virgin resources. Utility Model Content

[0003] In view of the above-mentioned shortcomings in the prior art, the present invention provides a PE coated paper that is easy to recycle and separate, so as to solve the problems in the background art.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A PE-coated paper that is easy to recycle and separate includes a paper layer and a PE coating layer, and also includes a separation layer. The separation layer is a water-soluble polyethylene film with a thickness of 3-8 μm and is disposed between the paper layer and the PE coating layer. The separation layer forms a weak physical adsorption bond with the upper surface of the paper layer and the lower surface of the PE coating layer through the surface tension and molecular properties of the material.

[0006] Furthermore, a tearable PE sealing strip is provided around the perimeter of the PE coating layer.

[0007] Furthermore, one side of the tearable PE sealing strip is thermally connected to the edge of the PE coating layer to form an integral structure, and the other side covers the outer edge of the paper layer.

[0008] Furthermore, the tearable PE sealing strip has a tear-off notch at the corresponding position of the connection between the separation layer and the PE coating layer, and a tear block is provided at one end of the tear-off notch.

[0009] Furthermore, the side of the paper layer away from the separating layer is provided with several anti-slip protrusions.

[0010] Furthermore, the anti-slip bumps are printed and cured using water-based ink, with a height of 0.2mm, a diameter of 0.4mm, and a matrix distribution of 3mm×3mm.

[0011] Furthermore, the side of the PE coating layer away from the separation layer is provided with several separation grooves.

[0012] Furthermore, the depth of the separation groove is 1 / 4 to 1 / 3 of the PE coating layer, and its length is flush with the PE coating layer.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] Compared with the prior art, in this utility model, since the separation layer is a water-soluble polyethylene film, the separation layer begins to dissolve when it comes into contact with water, realizing the natural separation of the PE coating layer and the paper layer. No high temperature or chemical treatment is required, reducing energy consumption and pollution, and realizing resource recycling. Attached Figure Description

[0015] Figure 1 This is a cross-sectional schematic diagram of a PE coated paper that is easy to recycle and separate according to the present invention;

[0016] Figure 2 This is a side view of a PE coated paper that is easy to recycle and separate according to the present invention.

[0017] Figure 3 This is a schematic diagram of the overall structure of a PE coated paper that is easy to recycle and separate according to this utility model;

[0018] The reference numerals in the accompanying drawings include: 1 paper layer, 101 anti-slip bumps, 2 separation layer, 3 PE coating layer, 301 separation groove, 4 tearable PE edge sealing strip, 401 tear block, and 402 tear notch. Detailed Implementation

[0019] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this application. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0021] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0022] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Example 1:

[0024] like Figure 1-3 As shown, this utility model provides a PE coated paper that is easy to recycle and separate, including a paper layer 1 and a PE coated layer 3, and a separation layer 2. The separation layer 2 is a water-soluble polyethylene film with a thickness of 3-8 μm, and is disposed between the paper layer 1 and the PE coated layer 3. The separation layer 2 forms a weak physical adsorption bond with the upper surface of the paper layer 1 and the lower surface of the PE coated layer 3 through the surface tension and molecular properties of the material. In this design, due to its water solubility, the separation layer 2 begins to dissolve when it comes into contact with water, so that the PE coated layer 3 and the paper layer 1 can be naturally separated without the need for high temperature or chemical treatment, reducing energy consumption and pollution, and realizing resource recycling.

[0025] In this embodiment, a tearable PE sealing strip 4 is provided around the perimeter of the PE coating layer 3, forming a continuous waterproof barrier with the PE coating layer 3. This can prevent liquid from seeping into the paper layer 1 and the separation layer 2 from the edge gaps, thus avoiding the separation layer 2 from dissolving in water during use and affecting the use of the coated paper.

[0026] In this embodiment, one side of the tearable PE sealing strip 4 is thermally connected to the edge of the PE coating layer 3 to form an integral structure, and the other side covers the outer edge of the paper layer 1.

[0027] In this embodiment, the tearable PE sealing strip 4 has a tear notch 402 at the corresponding position of the connection between the separation layer 2 and the PE coating layer 3. One end of the tear notch 402 is provided with a tearing block 401. When recycling is required, the tearing block 401 is pulled and torn along the tear notch 402 to expose the connection between the separation layer 2 and the PE coating layer 3 to clean water, thereby dissolving the separation layer 2.

[0028] In this embodiment, the side of the paper layer 1 away from the separation layer 2 is provided with a number of anti-slip protrusions 101 to increase the friction coefficient between the PE coated paper and the stacked contact surface, and to prevent the packaging from sliding or tipping over due to the smooth surface during stacking and transportation.

[0029] In this embodiment, the anti-slip bumps 101 are printed and cured with water-based ink, with a height of 0.2 mm and a diameter of 0.4 mm, and are distributed in a matrix pattern of 3 mm × 3 mm.

[0030] In this embodiment, a plurality of separation grooves 301 are provided on the side of the PE coating layer 3 away from the separation layer 2, which can guide the water to spread rapidly and penetrate into the separation layer 2 through the interlayer gaps, thereby avoiding disorderly diffusion on the surface of the PE coating layer and shortening the separation time.

[0031] In this embodiment, the depth of the separation groove 301 is 1 / 4 to 1 / 3 of the PE coating layer 3, and its length is flush with that of the PE coating layer 3.

[0032] The working principle of this utility model is as follows: When recycling is required, pull the tearing block 401 and tear it along the tearing notch 402 to expose the connection between the separation layer 2 and the PE coating layer 3. Then, immerse the utility model in room temperature water. The separation tank 301 guides the water flow through the gaps between the layers to quickly penetrate between the paper layer 1 and the PE coating layer 3, allowing the water to penetrate the separation layer 2. Due to its water solubility, the separation layer 2 begins to dissolve upon contact with water, achieving natural separation between the PE coating layer 3 and the paper layer 1. The separated base paper 1 can be directly used for paper recycling, and the PE coating layer 3 can be washed, melted, and granulated. The entire process does not require high temperature or chemical treatment, reducing energy consumption and pollution, and realizing resource recycling.

[0033] The above are merely embodiments of this utility model. The circuits, electronic components, and modules involved are all prior art, fully achievable by those skilled in the art, and require no further explanation. The content protected by this application does not involve improvements to the software or methods. Commonly known structures and characteristics in the solution are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field to which this utility model pertains prior to the application date or priority date, are able to access all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in conjunction with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A PE-coated paper that is easy to recycle and separate, comprising a paper layer (1) and a PE coating layer (3), characterized in that: It also includes a separation layer (2), which is a water-soluble polyethylene film with a thickness of 3-8 μm and is disposed between the paper layer (1) and the PE coating layer (3). The separation layer (2) forms a weak physical adsorption bond with the upper surface of the paper layer (1) and the lower surface of the PE coating layer (3) through the surface tension and molecular properties of the material.

2. The PE coated paper as described in claim 1, characterized in that: The PE coating layer (3) has a tearable PE sealing strip (4) around its four edges.

3. The PE coated paper for easy recycling and separation as described in claim 2, characterized in that: One side of the tearable PE sealing strip (4) is thermally connected to the edge of the PE coating layer (3) to form an integral structure, and the other side covers the outer edge of the paper layer (1).

4. The PE coated paper for easy recycling and separation as described in claim 2, characterized in that: The tearable PE sealing strip (4) has a tear notch (402) at the corresponding position of the connection between the separation layer (2) and the PE coating layer (3), and a tear block (401) is provided at one end of the tear notch (402).

5. The PE coated paper as described in claim 1, characterized in that: The paper layer (1) has a number of anti-slip protrusions (101) on the side away from the separation layer (2).

6. The PE coated paper as described in claim 5, characterized in that: The anti-slip bumps (101) are printed and cured with water-based ink, with a height of 0.2 mm and a diameter of 0.4 mm, and are distributed in a matrix pattern of 3 mm × 3 mm.

7. The PE coated paper as described in claim 1, characterized in that: The PE coating layer (3) has several separation grooves (301) on the side away from the separation layer (2).

8. The PE coated paper as described in claim 7, characterized in that: The separation groove (301) has a depth of 1 / 4 to 1 / 3 of the PE coating layer (3) and a length that is flush with the PE coating layer (3).

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