Rich mineral paper corrugated board and processing method thereof

Abstract

The invention provides a stone paper corrugated board and a processing method thereof. The stone paper corrugated board comprises surface paper, inner paper and corrugated paper, the surface paper and the inner paper are bonded with the surfaces of the two opposite sides of the corrugated paper respectively, a plurality of corrugated structures are arranged on the corrugated paper, every two adjacent corrugated structures are connected through a first straight part, and the corrugated structures are formed through hot pressing of a corrugated pressing roller. The formula of the surface paper, the formula of the inner paper and the formula of the tile paper all comprise carbonic acid, polyethylene and auxiliaries, the polyethylene content of the tile paper is larger than that of the surface paper, and the polyethylene content of the tile paper is larger than that of the inner paper, that is, the polyethylene content of the tile paper is large, and therefore the machinability of the tile paper is improved; the problem of stress concentration at the joint of the first straight part and the corrugated structure is avoided, and the polyethylene content in the surface paper and the inner paper is low, so that the production cost of the stone paper corrugated board is effectively reduced.

Description

Technical Field

[0001] The invention relates to the field of stone paper processing, and in particular to a stone paper corrugated board and a processing method thereof. Background Art

[0002] Relying on the functional advantages of environmentally friendly stone paper, such as environmental protection, waterproof, moisture-proof and fresh-keeping, we upgrade the technology to manufacture hard packaging boards that can be used for packaging and other functions, which are used to replace hollow board boxes, foam boxes and other plastic products currently circulating in the market.

[0003] Mainly used in high-end fruit packaging boxes, seafood packaging boxes and other markets.

[0004] For this purpose, environmentally friendly stone paper corrugated cardboard has been developed for environmentally friendly, waterproof, moisture-proof and fresh-keeping packaging.

[0005] However, the existing stone paper corrugated board has problems such as the surface paper and the corrugated paper are prone to shifting, and the corrugated paper is prone to internal damage. Summary of the invention

[0006] In view of this, the purpose of the embodiments disclosed in the present invention is to provide a stone paper corrugated board and a processing method thereof, so as to solve the problem in the prior art that the surface paper and the corrugated paper are prone to displacement and the corrugated paper is prone to internal damage.

[0007] In order to solve the above technical problems, the embodiments disclosed in the present invention adopt the following technical solutions:

[0008] A stone paper corrugated board, comprising face paper, inner paper and corrugated paper, wherein the face paper and inner paper are respectively bonded to the opposite surfaces of the corrugated paper, a plurality of corrugated structures are arranged on the corrugated paper, adjacent corrugated structures are connected by a first straight portion, the corrugated structure is formed by hot pressing with a corrugating roller, the face paper, inner paper and corrugated paper all comprise carbonic acid, polyethylene and an additive in their formulas, wherein the polyethylene content of the corrugated paper is greater than that of the face paper, and the polyethylene content of the corrugated paper is greater than that of the inner paper.

[0009] The corrugated structures are connected by the first straight part, and the first straight part is bonded to the face paper. On the one hand, the bonding area between the corrugated paper and the face paper can be increased to avoid the displacement of the two and affect the structural strength of the stone paper corrugated board. On the other hand, while ensuring the buffering effect of the corrugated structure, the supporting capacity of the face paper can be improved to avoid deformation of the stone paper corrugated board when it is impacted by external forces. The polyethylene content in the corrugated paper is greater than the polyethylene content in the face paper and the inner paper, that is, the polyethylene content in the corrugated paper is relatively high, thereby improving the processability of the corrugated paper and avoiding the problem of stress concentration at the junction of the first straight part and the corrugated structure. The polyethylene content in the face paper and the inner paper is relatively low, thereby effectively reducing the production cost of the stone paper corrugated board.

[0010] In some embodiments of the present invention, the formula of the facial paper includes: 80-85% calcium carbonate, 12-17% polyethylene, and 3% additives;

[0011] The formula of the lining paper includes: 65-75% calcium carbonate, 22-32% polyethylene, and 3% additive;

[0012] The formula of the tile paper includes: 80-85% calcium carbonate, 12-17% polyethylene and 3% additives.

[0013] In some embodiments of the present invention, a second straight portion is provided on a side of part of the corrugated structure facing the inner paper.

[0014] The bonding area between the corrugated paper and the inner paper can be increased by bonding the second straight portion to the inner paper, thereby preventing the two from shifting and affecting the structural strength of the stone paper corrugated paper, and further improving the structural reliability of the stone paper corrugated paperboard.

[0015] In some embodiments of the present invention, the multiple corrugated structures include a first type of corrugated structure and a second type of corrugated structure, the first type of corrugated structure is arc-shaped on the side facing the lining paper, the second straight portion is arranged on the second type of corrugated structure, and the first type of corrugated structure and the second type of corrugated structure are arranged alternately.

[0016] By alternately arranging the second type of corrugated structure with the second straight portion and the first type of arc-shaped corrugated structure, the overall cushioning effect of the corrugated paper can be improved while ensuring the bonding strength between the corrugated paper and the lining paper.

[0017] In some embodiments of the present invention, the cross-sectional shape of the second type of corrugated structure includes a rectangle or a trapezoid.

[0018] In some embodiments of the present invention, a pattern layer is provided on the surface of the face paper facing away from the corrugated paper, the face paper is bonded to the corrugated paper via an adhesive layer, and the back paper is bonded to the corrugated paper via hot pressing.

[0019] The pattern layer of the face paper can provide aesthetics and identification. The face paper is bonded to the tile paper through the adhesive layer, which ensures the bonding effect while avoiding damage to the pattern layer on the face paper. After the processing, the inner paper can use its own heat to fully hot-press and bond with the tile paper, thereby improving production efficiency and reducing production costs.

[0020] In some embodiments of the present invention, the polyethylene content of the inner paper is greater than the polyethylene content of the outer paper.

[0021] The polyethylene content of the inner paper is set to be greater than that of the outer paper, that is, the polyethylene content of the inner paper is higher, thereby ensuring the bonding strength between the inner paper and the corrugated paper.

[0022] A method for processing stone paper corrugated board, the processing method comprising:

[0023] Provided are face paper, lining paper and corrugated paper, wherein the corrugated paper is provided with a plurality of corrugated structures, adjacent corrugated structures are connected by a first straight portion, and the corrugated structures are formed by hot pressing with a corrugating roller, wherein the face paper, the lining paper and the corrugated paper all have a formula comprising carbonic acid, polyethylene and an additive, wherein the polyethylene content of the corrugated paper is greater than that of the face paper, and the polyethylene content of the corrugated paper is greater than that of the lining paper;

[0024] The surface paper and the inner paper are respectively bonded to the two opposite surfaces of the corrugated paper to obtain the stone paper corrugated board.

[0025] In some embodiments of the present invention, the method for making the facial tissue comprises:

[0026] Outputting the first stone paper base paper through the first stone paper making machine;

[0027] Performing single-sided coating on the first stone paper base paper to obtain single-sided coated stone paper;

[0028] Performing surface printing on the single-sided coated stone paper to form a pattern layer on the surface of the single-sided coated stone paper to obtain the surface paper;

[0029] The method for making the tile paper comprises:

[0030] Outputting the second stone paper base paper through the second stone paper making machine;

[0031] The second stone paper base paper is hot-pressed by a corrugating roller, and the second stone paper base paper is shaped by a cooling shaping roller to obtain the corrugated paper;

[0032] The method for making the inner paper comprises:

[0033] The inner paper is outputted through a third stone paper making machine.

[0034] In some embodiments of the present invention, the step of bonding the face paper and the back paper to the two opposite surfaces of the corrugated paper comprises:

[0035] The surface paper and the corrugated paper are bonded together through an adhesive layer, and the inner paper is bonded to the corrugated paper by hot pressing.

[0036] The beneficial effects of the present invention are as follows: the embodiment disclosed in the present invention provides a stone paper corrugated board, wherein the corrugated structures are connected by a first straight portion, and are bonded to the face paper through the first straight portion. On the one hand, the bonding area between the corrugated paper and the face paper can be increased to avoid the displacement of the two and affect the structural strength of the stone paper corrugated board. On the other hand, while ensuring the buffering effect of the corrugated structure, the supporting capacity of the face paper can be improved to avoid deformation of the stone paper corrugated board when it is impacted by external forces. The polyethylene content in the corrugated paper is greater than the polyethylene content in the face paper and the inner paper, that is, the polyethylene content in the corrugated paper is relatively high, thereby improving the processability of the corrugated paper and avoiding the problem of stress concentration at the junction of the first straight portion and the corrugated structure. The polyethylene content in the face paper and the inner paper is relatively low, thereby effectively reducing the production cost of the stone paper corrugated board. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram showing the structure of a stone paper corrugated board provided in a specific embodiment of the present application;

[0038] Figure 2 A schematic diagram showing the structure of a stone paper corrugated board provided in another specific embodiment of the present application;

[0039] Figure 3 A flow chart showing a method for processing stone paper corrugated board provided by a specific embodiment of the present application;

[0040] Figure 4 A schematic diagram showing the processing process of stone paper corrugated board provided in another specific embodiment of the present application.

[0041] in:

[0042] 100, face paper; 110, pattern layer; 200, lining paper; 300, corrugated paper; 310, corrugated structure; 311, first type of corrugated structure; 312, second type of corrugated structure; 320, first straight portion; 330, second straight portion; 400, adhesive layer. DETAILED DESCRIPTION

[0043] The specific implementation of the present invention is further described in detail below in conjunction with the drawings and examples.

[0044] Relying on the functional advantages of environmentally friendly stone paper, such as environmental protection, waterproof, moisture-proof and fresh-keeping, we upgrade the technology to manufacture hard packaging boards that can be used for packaging and other functions, which are used to replace hollow board boxes, foam boxes and other plastic products currently circulating in the market.

[0045] Mainly used in high-end fruit packaging boxes, seafood packaging boxes and other markets.

[0046] For this purpose, environmentally friendly stone paper corrugated cardboard has been developed for environmentally friendly, waterproof, moisture-proof and fresh-keeping packaging.

[0047] However, the existing stone paper corrugated board has problems such as the surface paper and the corrugated paper are prone to shifting, and the corrugated paper is prone to internal damage.

[0048] In view of the above problems, the inventors of the present invention found that the facial paper and the corrugated paper are prone to slippage because the contact area between the facial paper and the corrugated paper is too small. If the contact area between the facial paper and the corrugated paper is to be increased and the buffering effect of the corrugated paper is to be ensured, stress problems will exist between the structure in contact with the facial paper and the buffering structure, causing damage to the corrugated paper itself due to stress problems.

[0049] Based on this, the exemplary embodiment of the present invention provides a stone paper corrugated board, such as Figure 1 As shown, the stone paper corrugated board includes a face paper 100, a lining paper 200 and a corrugated paper 300, wherein the face paper 100 and the lining paper 200 are respectively bonded to the opposite surfaces of the corrugated paper 300, a plurality of corrugated structures 310 are arranged on the corrugated paper 300, and adjacent corrugated structures 310 are connected by a first straight portion 320, and the corrugated structure 310 is formed by hot pressing with a corrugating roller, and the formulas of the face paper 100, the lining paper 200 and the corrugated paper 300 all include carbonic acid, polyethylene and additives, wherein the polyethylene content of the corrugated paper 300 is greater than that of the face paper 100, and the polyethylene content of the corrugated paper 300 is greater than that of the lining paper 200.

[0050] In the stone paper corrugated board provided in this embodiment, the corrugated structures 310 are connected by the first straight portion 320, and are bonded to the face paper 100 through the first straight portion 320. On the one hand, the bonding area between the corrugated paper 300 and the face paper 100 can be increased to avoid the displacement of the two and affect the structural strength of the stone paper corrugated board. On the other hand, while ensuring the buffering effect of the corrugated structure 310, the supporting capacity of the face paper 100 can be improved to avoid deformation of the stone paper corrugated board when it is impacted by external force. The polyethylene content in the corrugated paper 300 is greater than the polyethylene content in the face paper 100 and the inner paper 200, that is, the polyethylene content in the corrugated paper 300 is relatively high, thereby improving the processability of the corrugated paper 300, avoiding the problem of stress concentration at the junction of the first straight portion 320 and the corrugated structure 310, and the polyethylene content in the face paper 100 and the inner paper 200 is relatively low, thereby effectively reducing the production cost of the stone paper corrugated board.

[0051] Exemplarily, the formula of the facial tissue 100 includes: 80-85% calcium carbonate, 12-17% polyethylene, and 3% additives;

[0052] The formula of the lining paper 200 includes: 65-75% calcium carbonate, 22-32% polyethylene, and 3% additive;

[0053] The formula of the corrugated paper 300 includes: 80-85% calcium carbonate, 12-17% polyethylene, and 3% additives.

[0054] In another embodiment, if Figure 2 As shown, a second straight portion 330 is provided on a side of the part of the corrugated structure 310 facing the inner paper 200. The bonding of the second straight portion 330 with the inner paper 200 can increase the bonding area between the corrugated paper 300 and the inner paper 200, thereby preventing the displacement of the two and affecting the structural strength of the stone paper corrugated paper, and further improving the structural reliability of the stone paper corrugated paperboard.

[0055] For example, reference Figure 2 As shown, the plurality of corrugated structures 310 include a first type of corrugated structure 311 and a second type of corrugated structure 312, the first type of corrugated structure 311 is arc-shaped on the side facing the lining paper 200, the second straight portion 330 is disposed on the second type of corrugated structure 312, and the first type of corrugated structure 311 and the second type of corrugated structure 312 are alternately arranged. By alternately arranging the second type of corrugated structure 312 with the second straight portion 330 and the arc-shaped first type of corrugated structure 311, the overall cushioning effect of the corrugated paper 300 can be improved while ensuring the bonding strength between the corrugated paper 300 and the lining paper 200.

[0056] Exemplarily, the cross-sectional shape of the second type corrugated structure 312 includes a rectangle or a trapezoid.

[0057] In some embodiments of the present invention, a pattern layer 110 is provided on the surface of the face paper 100 facing away from the corrugated paper 300, the face paper 100 is bonded to the corrugated paper 300 via an adhesive layer 400, and the inner paper 200 is bonded to the corrugated paper 300 via hot pressing.

[0058] The pattern layer 110 of the face paper 100 can provide aesthetics, identification and other functions. The face paper 100 is bonded to the corrugated paper 300 through the adhesive layer 400, which ensures the bonding effect while avoiding damage to the pattern layer 110 on the face paper 100. After the inner paper 200 is processed, the heat of the inner paper 200 itself can be used to completely hot-press bond with the corrugated paper 300, thereby improving production efficiency and reducing production costs.

[0059] In one embodiment, the polyethylene content of the inner paper 200 is greater than the polyethylene content of the outer paper 100 .

[0060] In this embodiment, the polyethylene content of the lining paper 200 is set to be greater than that of the face paper 100, that is, the polyethylene content of the lining paper 200 is relatively high, thereby ensuring the bonding strength between the lining paper 200 and the corrugated paper 300. In addition, since the lining paper 200 is in contact with the material to be packaged, the higher polyethylene content can improve its flexibility, thereby providing good protection for the material to be packaged inside.

[0061] In the stone paper corrugated board provided by this embodiment, the corrugated structures are connected by the first straight part, and the first straight part is bonded to the face paper. On the one hand, the bonding area between the corrugated paper and the face paper can be increased to avoid the displacement of the two and affect the structural strength of the stone paper corrugated board. On the other hand, while ensuring the buffering effect of the corrugated structure, the supporting capacity of the face paper can be improved to avoid deformation of the stone paper corrugated board when it is impacted by external force. The polyethylene content in the corrugated paper is greater than the polyethylene content in the face paper and the inner paper, that is, the polyethylene content in the corrugated paper is relatively high, thereby improving the processability of the corrugated paper and avoiding the problem of stress concentration at the junction of the first straight part and the corrugated structure. The polyethylene content in the face paper and the inner paper is relatively low, thereby effectively reducing the production cost of the stone paper corrugated board.

[0062] An embodiment of the present invention further provides a method for processing stone paper corrugated paperboard, for example, for processing the stone paper corrugated paperboard provided in the above embodiments. Figure 3 As shown, the processing method comprises:

[0063] S100, providing face paper, lining paper and corrugated paper, wherein the corrugated paper is provided with a plurality of corrugated structures, adjacent corrugated structures are connected by a first straight portion, the corrugated structures are formed by hot pressing with a corrugating roller, the face paper, lining paper and corrugated paper all have a formula comprising carbonic acid, polyethylene and an additive, the polyethylene content of the corrugated paper is greater than that of the face paper, and the polyethylene content of the corrugated paper is greater than that of the lining paper.

[0064] S200, bonding the face paper and the back paper to the opposite sides of the corrugated paper respectively to obtain the stone paper corrugated board.

[0065] In the processing method of the stone paper corrugated board provided in this embodiment, the corrugated structures are connected by the first straight part, and the first straight part is bonded to the face paper. On the one hand, the bonding area between the corrugated paper and the face paper can be increased to avoid the displacement of the two and affect the structural strength of the stone paper corrugated board. On the other hand, while ensuring the buffering effect of the corrugated structure, the supporting capacity of the face paper can be improved to avoid deformation of the stone paper corrugated board when it is impacted by external force. The polyethylene content in the corrugated paper is greater than the polyethylene content in the face paper and the inner paper, that is, the polyethylene content in the corrugated paper is relatively high, thereby improving the processability of the corrugated paper and avoiding the problem of stress concentration at the junction of the first straight part and the corrugated structure. The polyethylene content in the face paper and the inner paper is relatively low, thereby effectively reducing the production cost of the stone paper corrugated board.

[0066] Among them, Figure 4 As shown, the method for making the facial tissue comprises:

[0067] Outputting the first stone paper base paper through the first stone paper making machine;

[0068] Performing single-sided coating on the first stone paper base paper to obtain single-sided coated stone paper;

[0069] The surface of the single-sided coated stone paper is printed to form a pattern layer on the surface of the single-sided coated stone paper to obtain the surface paper.

[0070] The method for making the tile paper comprises:

[0071] Outputting the second stone paper base paper through the second stone paper making machine;

[0072] The second stone paper base paper is hot pressed by a corrugating roller and shaped by a cooling shaping roller to obtain the corrugated paper. According to the performance of the stone paper and product requirements, the hot pressing temperature is usually controlled at 60 to 250°C.

[0073] The method for making the inner paper comprises:

[0074] The inner paper is outputted through a third stone paper making machine.

[0075] In this embodiment, reference Figure 4 As shown, the first stone paper making machine, the second stone paper making machine and the third stone paper making machine can output stone paper base paper at the same time, and on this basis, pre-treat the stone paper base paper that needs to be processed, and then compound the three layers at the same time, effectively improving production efficiency.

[0076] After the lamination is completed, the final stone paper corrugated cardboard can be obtained by smoothing, cooling and shaping.

[0077] Three-layer paperboard is mainly made of stone paper series. According to different performance and product requirements, stone paper thick paper (150-600μm), stone paper thin paper (27-200μm), stone paper sheet (150-800μm) can be used. In addition, in order to achieve better printing and bonding effects, the surface of the three-layer paper needs to be corona treated (the corona effect and dyne value range are adjusted according to product requirements, and the dyne value generally needs to reach ≥45dyn / cm) to increase the surface tension of the product (surface tension coefficient) and improve the printability and bonding of the product.

[0078] In one embodiment, the step of bonding the face paper and the back paper to the opposite sides of the corrugated paper comprises:

[0079] The face paper and the corrugated paper are bonded together by an adhesive layer, and the backing paper is bonded to the corrugated paper by hot pressing. In this way, the backing paper can be preheated for hot pressing, thereby further improving production efficiency and reducing production costs.

[0080] The cardboard formed by the above process is environmentally friendly stone paper corrugated cardboard. The packaging products made from it, through the environmentally friendly, waterproof, moisture-proof and fresh-keeping functional advantages of environmentally friendly stone paper, can replace the hollow board boxes, foam boxes and other plastic products currently circulating in the market.

[0081] The above implementation modes are only used to illustrate the present invention, but not to limit the present invention. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention. The patent protection scope of the present invention should be defined by the claims.

Claims

1. A stone paper corrugated board, characterized in that: The stone paper corrugated board comprises face paper, lining paper and corrugated paper, wherein the face paper and lining paper are respectively bonded to the two opposite surfaces of the corrugated paper, a plurality of corrugated structures are arranged on the corrugated paper, adjacent corrugated structures are connected by a first straight portion, and the corrugated structure is formed by hot pressing with a corrugating roller, and the formulas of the face paper, the lining paper and the corrugated paper all comprise carbonic acid, polyethylene and additives, wherein the polyethylene content of the corrugated paper is greater than that of the face paper, and the polyethylene content of the corrugated paper is greater than that of the lining paper.

2. The stone paper corrugated board according to claim 1, characterized in that: The formula of the facial paper includes: 80-85% calcium carbonate, 12-17% polyethylene, and 3% additives; The formula of the lining paper includes: 65-75% calcium carbonate, 22-32% polyethylene, and 3% additive; The formula of the tile paper includes: 80-85% calcium carbonate, 12-17% polyethylene and 3% additives.

3. The stone paper corrugated board according to claim 1, characterized in that: A second straight portion is provided on a side of part of the corrugated structure facing the inner paper.

4. The stone paper corrugated board according to claim 3, characterized in that: The multiple corrugated structures include a first type of corrugated structure and a second type of corrugated structure, the first type of corrugated structure is arc-shaped on the side facing the liner, the second straight portion is arranged on the second type of corrugated structure, and the first type of corrugated structure and the second type of corrugated structure are alternately arranged.

5. The stone paper corrugated board according to claim 4, characterized in that: The cross-sectional shape of the second type of corrugated structure includes a rectangle or a trapezoid.

6. The stone paper corrugated board according to any one of claims 1 to 5, characterized in that: A pattern layer is arranged on the surface of the face paper facing away from the corrugated paper, the face paper is bonded to the corrugated paper via an adhesive layer, and the inner paper is bonded to the corrugated paper via hot pressing.

7. The stone paper corrugated board according to claim 6, characterized in that: The polyethylene content of the inner paper is greater than that of the outer paper.

8. A method for processing stone paper corrugated board, characterized in that: The processing method comprises: Provided are face paper, lining paper and corrugated paper, wherein the corrugated paper is provided with a plurality of corrugated structures, adjacent corrugated structures are connected by a first straight portion, and the corrugated structures are formed by hot pressing with a corrugating roller, wherein the face paper, the lining paper and the corrugated paper all have a formula comprising carbonic acid, polyethylene and an additive, wherein the polyethylene content of the corrugated paper is greater than that of the face paper, and the polyethylene content of the corrugated paper is greater than that of the lining paper; The surface paper and the inner paper are respectively bonded to the two opposite surfaces of the corrugated paper to obtain the stone paper corrugated board.

9. The method for processing stone paper corrugated board according to claim 8, characterized in that: The method for making the facial paper comprises: Outputting the first stone paper base paper through the first stone paper making machine; Performing single-sided coating on the first stone paper base paper to obtain single-sided coated stone paper; Performing surface printing on the single-sided coated stone paper to form a pattern layer on the surface of the single-sided coated stone paper to obtain the surface paper; The method for making the tile paper comprises: Outputting the second stone paper base paper through the second stone paper making machine; The second stone paper base paper is hot-pressed by a corrugating roller, and the second stone paper base paper is shaped by a cooling shaping roller to obtain the corrugated paper; The method for making the inner paper comprises: The inner paper is outputted through a third stone paper making machine.

10. The method for processing stone paper corrugated board according to claim 8, characterized in that: The step of bonding the face paper and the back paper to the two opposite surfaces of the corrugated paper comprises: The surface paper and the corrugated paper are bonded together through an adhesive layer, and the inner paper is bonded to the corrugated paper by hot pressing.

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