A method for producing graphene-coated corrugated paper

Abstract

The present invention discloses a method for producing graphene coating of corrugated paper, comprising an electrostatic holding device, a graphene coating device and a drying device sequentially arranged along the advancing direction of the corrugated paper production line; the electrostatic holding device comprises at least one group of electrostatic emitters and a DC high voltage power supply; the corrugated paper, which has completed the pasting of the inner paper, corrugation and face paper through the previous process, is treated by the electrostatic holding device, and a positive charge is attached to the lower surface; the graphene coating device comprises an embossing roller arranged at the upper part of the production line and a coating roller arranged at the lower part of the production line, and the corrugated paper is clamped between the two and moves forward along the production line. The present invention adopts an electrostatic holding device to pre-treat the surface of the corrugated paper, so that the graphene solution can be evenly coated on the surface of the corrugated paper, and then through microwave drying, the stability and reliability of the graphene coating layer are ensured, and the obtained corrugated paper graphene coating can be widely used in various product packaging that requires antibacterial storage or transportation.

Description

Technical Field

[0001] The present invention relates to the field of corrugated paper processing technology. More specifically, the present invention relates to a method for producing graphene-coated corrugated paper. Background Art

[0002] In the prior art, graphene is a kind of carbon atom in the form of sp 2 Hybrid orbitals form a two-dimensional carbon nanomaterial with a hexagonal honeycomb lattice. It has excellent optical, electrical and mechanical properties, and has important application prospects in materials science, micro-nano processing, energy, biomedicine and drug delivery. Graphene is one of the strongest materials known, and it also has good toughness and can be bent. Nano-scale graphene can directly pierce and split viruses, fungi and molds, making them inactive. Corrugated paper is currently the most widely used packaging material, and there is no mature technology to combine the two to make antibacterial packaging materials. Summary of the invention

[0003] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages which will be described hereinafter.

[0004] In order to achieve these purposes and other advantages according to the present invention, a method for producing graphene-coated corrugated paper is provided, comprising an electrostatic holding device, a graphene coating device and a drying device sequentially arranged along the advancing direction of the corrugated paper production line;

[0005] The electrostatic holding device includes at least one set of electrostatic emitters and a DC high voltage power supply; after the corrugated paper that has been pasted with the inner paper, corrugated paper and face paper through the previous process is processed by the electrostatic holding device, a positive charge is added to the lower surface;

[0006] The graphene coating device includes an embossing roller arranged at the upper part of the production line and a coating roller arranged at the lower part of the production line. The embossing roller rotates in opposite directions to the coating roller, clamping the corrugated paper between the two and moving forward along the production line; the lower part of the coating roller is immersed in the graphene solution in the glue tank, and the coating roller adheres the graphene solution to the side of the coating roller when rotating, and the graphene solution is coated on the lower surface of the corrugated paper.

[0007] Preferably, the electrostatic applying device comprises 3 to 5 groups of electrostatic emitters, and the operating voltage is 5 to 50 kV.

[0008] Preferably, a scraper is further provided on one side of the coating roller, and the scraper is arranged parallel to the axial direction of the coating roller.

[0009] Preferably, the coating roller is an anilox roller, the cells of the anilox roller are quadrangular pyramids or hexagonal pyramids, and the coating amount is 4 to 8 g / ㎡.

[0010] Preferably, the drying device is a microwave drying oven, and the operating temperature of the microwave drying oven is 60-80°C.

[0011] The present invention includes at least the following beneficial effects: since the surface of the corrugated paper is pretreated by an electrostatic holding device, the graphene solution can be evenly coated on the surface of the corrugated paper, and then microwave drying is performed to ensure the stability and reliability of the graphene coating layer. The obtained corrugated paper graphene coating can be widely used in various product packaging that requires antibacterial storage or transportation, such as fresh fruits, medicines, medical devices or cosmetics, etc.

[0012] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a graphene-coated corrugated paper production line in one embodiment of the present invention; DETAILED DESCRIPTION

[0014] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0015] It should be understood that terms such as “having”, “including” and “comprising” used herein do not specify the existence or addition of one or more other elements or combinations thereof.

[0016] Figure 1 An implementation form according to the present invention is shown, comprising an electrostatic holding device 1, a graphene coating device and a drying device 2 which are sequentially arranged along the advancing direction of a corrugated paper production line;

[0017] The electrostatic holding device 1 includes at least one set of electrostatic emitters and a DC high voltage power supply; after the corrugated paper 3 that has been pasted with the inner paper, corrugated paper and face paper through the previous process is processed by the electrostatic holding device, a positive charge is added to the lower surface;

[0018] The graphene coating device includes an embossing roller 4 arranged at the upper part of the production line and a coating roller 5 arranged at the lower part of the production line. The embossing roller 4 and the coating roller 5 rotate in opposite directions, clamping the corrugated paper 3 between the two and moving forward along the production line; the lower part of the coating roller 5 is immersed in the graphene solution 7 in the glue tank 6, and the coating roller 5 adheres the graphene solution 7 to the side of the coating roller 5 when rotating, and the graphene solution 7 is coated on the lower surface of the corrugated paper 3.

[0019] In another example, the proportions of the components in the graphene solution 7 are as follows: 20 to 30 parts by weight of cellulose, 15 to 20 parts by weight of straw powder, 1 to 5 parts by weight of chitosan, 20 to 30 parts by weight of starch, 0.1 to 0.3 parts by weight of graphene powder, 20 to 30 parts by weight of adhesive, 5 to 10 parts by weight of cross-linking agent, 4 to 8 parts by weight of polyvinyl alcohol and 100 to 500 parts by weight of water, all of which are added to the glue tank and stirred evenly. With this solution, graphene can be evenly dispersed in the solution, and can be firmly adhered to the surface of corrugated paper after being coated on the surface of corrugated paper. Moreover, this method is only an illustration of a preferred example, but is not limited thereto. When implementing the present invention, the state can be implemented according to user needs.

[0020] One implementation of the graphene coated corrugated paper production method in the above scheme is: the electrostatic support device includes 3 to 5 groups of electrostatic emitters, and the working voltage is 5 to 50 kV. In this scheme, multiple groups of electrostatic emitters are used to electrostatically support the lower surface of the corrugated paper 3, which can stabilize the electrostatic distribution on the surface of the corrugated paper and ensure the smooth progress of the subsequent coating process.

[0021] One implementation of the method for producing graphene-coated corrugated paper in the above scheme is that a scraper 8 is further provided on one side of the coating roller, and the scraper 8 is axially arranged parallel to the coating roller 5. In this scheme, the scraper 8 can scrape off the excess graphene solution on the coating roller 5, so that the graphene solution coated on the surface of the corrugated paper is more uniform.

[0022] One implementation of the method for producing graphene-coated corrugated paper in the above scheme is that the coating roller 5 is an anilox roller, the cells of the anilox roller are quadrangular pyramids or hexagonal pyramids, and the coating amount is 4 to 8 g / ㎡. In this scheme, a smaller anilox roller is used so that the graphene solution coated on the surface of the corrugated paper is more uniform.

[0023] One implementation of the method for producing graphene-coated corrugated paper in the above scheme is that the drying device is a microwave drying oven, and the working temperature of the microwave drying oven is 60-80° C. This scheme enables the graphene coating to be quickly dried and fixed on the surface of the corrugated paper.

[0024] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0025] As described above, according to the present invention, since an electrostatic holding device is used to pre-treat the surface of the corrugated paper, the graphene solution can be evenly coated on the surface of the corrugated paper, and then microwave drying is performed to ensure the stability and reliability of the graphene coating layer. The obtained corrugated paper graphene coating can be widely used in various product packaging that requires antibacterial storage or transportation.

[0026] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and equivalent scope, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. A method for producing graphene-coated corrugated paper, characterized in that: It includes an electrostatic holding device, a graphene coating device and a drying device which are sequentially arranged along the advancing direction of the corrugated paper production line; The electrostatic holding device includes at least one set of electrostatic emitters and a DC high voltage power supply; after the corrugated paper that has been pasted with the inner paper, corrugated paper and face paper through the previous process is processed by the electrostatic holding device, a positive charge is added to the lower surface; The graphene coating device comprises an embossing roller arranged at the upper part of the production line and a coating roller arranged at the lower part of the production line, wherein the embossing roller rotates in opposite directions to the coating roller, and the corrugated paper is clamped between the two and moves forward along the production line; the lower part of the coating roller is immersed in the graphene solution in the glue tank, and the coating roller adheres the graphene solution to the side of the coating roller when rotating, and the graphene solution is coated on the lower surface of the corrugated paper; The proportions of the components in the graphene solution are as follows: 20 to 30 parts by weight of cellulose, 15 to 20 parts by weight of straw powder, 1 to 5 parts by weight of chitosan, 20 to 30 parts by weight of starch, 0.1 to 0.3 parts by weight of graphene powder, 20 to 30 parts by weight of adhesive, 5 to 10 parts by weight of cross-linking agent, 4 to 8 parts by weight of polyvinyl alcohol and 100 to 500 parts by weight of water. All the components are added into the glue tank and stirred evenly. The drying device is a microwave drying oven, and the working temperature of the microwave drying oven is 60-80°C.

2. The method for producing graphene-coated corrugated paper according to claim 1, characterized in that: The electrostatic supporting device comprises 3 to 5 groups of electrostatic emitters, and the working voltage is 5 to 50 kV.

3. The method for producing graphene-coated corrugated paper according to claim 1, characterized in that: A scraper is also provided on one side of the coating roller, and the scraper is arranged parallel to the axial direction of the coating roller.

4. The method for producing graphene-coated corrugated paper according to claim 1, characterized in that: The coating roller is an anilox roller, the mesh cells of the anilox roller are quadrangular pyramids or hexagonal pyramids, and the coating amount is 4-8g / m 2 .

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