CN113463442B - High-strength corrugated carton and production method thereof - Google Patents
High-strength corrugated carton and production method thereof Download PDFInfo
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- CN113463442B CN113463442B CN202110653423.3A CN202110653423A CN113463442B CN 113463442 B CN113463442 B CN 113463442B CN 202110653423 A CN202110653423 A CN 202110653423A CN 113463442 B CN113463442 B CN 113463442B
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- corrugated
- corrugated medium
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
- D21H27/40—Multi-ply at least one of the sheets being non-planar, e.g. crêped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31F5/00—Attaching together sheets, strips or webs; Reinforcing edges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
- B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B29/005—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to another layer of paper or cardboard layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
- B32B29/08—Corrugated paper or cardboard
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
- B65D65/403—Applications of laminates for particular packaging purposes with at least one corrugated layer
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing paper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/04—4 layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/26—All layers being made of paper or paperboard
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Cartons (AREA)
- Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
Abstract
The invention relates to the technical field of carton preparation, in particular to a high-strength corrugated carton and a production method thereof. The high-strength corrugated case is prepared by adopting a reinforced corrugated board, and the reinforced corrugated board sequentially comprises outer-layer surface paper, first wavy corrugated base paper, second wavy corrugated base paper and inner-layer surface paper; the even interval in surface that the crest of first wave corrugated medium and second wave corrugated medium deviate from each other is provided with strengthens the long piece, the crest of first wave corrugated medium and the crest of second wave corrugated medium are in same vertical plane and cohere together completely. The invention has the beneficial effects that: compared with the prior art, the reinforced corrugated board of the high-strength corrugated case saves interlayer paper between two layers of corrugated base paper, and improves the ratio of the compressive strength to the weight of the corrugated board by using the arrangement structure of the corrugated base paper after the interlayer paper is removed.
Description
Technical Field
The invention relates to the technical field of carton preparation, in particular to a high-strength corrugated carton and a production method thereof.
Background
Corrugated paper boxes are ideal packaging containers, have the characteristics of light weight, firmness and vibration reduction, and have been used for transport packaging and sale packaging for many years. Corrugated boxes have won the market with their elegant appearance and inherently superior quality. It not only protects the goods, is convenient for storage and transportation, but also beautifies the goods and publicizes the goods. With the continuous increase of market demand, the production scale of corrugated paper boxes is rapidly enlarged, and the market competition is increasingly severe, so that the manufacturing process of the corrugated paper boxes needs to be comprehensively researched.
At present, the commonly used corrugated board generally forms a three-layer corrugated board structure by outer surface paper on the upper surface and the lower surface and corrugated paper in the middle, has low strength and poor impact resistance, and limits the packaging and transportation of some special products. In order to improve strength and impact resistance, it is common to increase the number of corrugated layers and construct a five-layer, seven-layer, or nine-layer structure. Because the thickness of the corrugated board is in direct proportion to the strength of the corrugated board. However, the method has limited effects of improving the strength and impact resistance of the corrugated board, not only wastes resources, but also reduces the packaging space.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a high-strength corrugated carton with impact resistance and cost saving and a production method thereof.
In order to solve the technical problems, the invention adopts the technical scheme that: a high-strength corrugated carton is provided, comprising a bottom layer, side walls and a face layer; the bottom layer, the side wall and the surface layer are made of reinforced corrugated boards; the surfaces of the side walls, which are deviated from each other, are also provided with a supporting and reinforcing structure, the supporting and reinforcing structure comprises a partition board correspondingly attached to the inner side surface of the side wall, and a reinforcing rib in the vertical direction is also arranged between the partition board and the side wall;
the reinforced corrugated board sequentially comprises outer-layer surface paper, first wavy corrugated base paper, second wavy corrugated base paper and inner-layer surface paper;
the even interval in surface that the crest of first wave corrugated medium and second wave corrugated medium deviate from each other is provided with strengthens the long piece, strengthen the long piece and set up along the wave extending direction of corrugated medium, the shape of first wave corrugated medium and second wave corrugated medium is the same, the crest of first wave corrugated medium and the crest of second wave corrugated medium are in the same perpendicular and completely cohere together.
Another technical solution of the present invention is to provide a method for producing the high-strength corrugated carton, comprising the following steps:
step S1, arranging a reinforcing long sheet on the surface of corrugated medium, obtaining first corrugated medium and second corrugated medium by using a corrugating machine, respectively spraying an adhesive on the first corrugated medium and the second corrugated medium, respectively adhering the first corrugated medium and the second corrugated medium to kraft paper, and completely adhering the peaks of the first corrugated medium and the second corrugated medium on the same vertical surface to obtain a reinforced corrugated board;
and S2, carrying out die cutting, indentation and box nailing/gluing on the reinforced corrugated board to obtain a corrugated case, and then adhering reinforcing ribs and partition plates on the surfaces of the corrugated cases, which are deviated from each other, to obtain the high-strength corrugated case.
The invention has the beneficial effects that: compared with the prior art, the reinforced corrugated board of the high-strength corrugated case comprises two outer-layer surface papers and two middle layers of corrugated base paper, so that the interlayer paper between the two layers of corrugated base paper is saved, the effect of the interlayer paper based on the middle layer on the rigidity and the bending strength of the corrugated board is not large, and the ratio of the compressive strength to the weight of the reinforced corrugated board is improved by removing and using the arrangement structure of the corrugated base paper. Furthermore, the strength of the corrugated base paper is increased by utilizing the reinforcing long sheet, and the corrugated base paper can bear larger pressure and is not easy to deform by matching with a structure that wave crests of the wavy corrugated base paper are abutted, so that the compressive strength of the obtained corrugated board is 2-5 times that of a common corrugated board with the same thickness. The corrugated board of the high-strength corrugated case has relatively weak deformation resistance in the vertical direction, so the corrugated board is provided with the partition board and the reinforcing ribs, and due to the existence of the reinforcing ribs, the bearing in the vertical direction is enhanced, and a space is generated between the partition board and the side wall, so that the corrugated case further has good heavy buffering and shockproof effects.
Drawings
Fig. 1 is a schematic vertical sectional view of reinforced corrugated cardboard according to an embodiment of the present invention;
description of the reference symbols:
1. outer surface paper; 2. a first corrugated medium; 3. a second corrugated medium; 4. the inner layer is a piece of tissue.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, a high-strength corrugated box includes a bottom layer, side walls and a surface layer; the bottom layer, the side wall and the surface layer are made of reinforced corrugated boards; the surfaces of the side walls, which are deviated from each other, are also provided with a supporting and reinforcing structure, the supporting and reinforcing structure comprises a partition board correspondingly attached to the inner side surface of the side wall, and a reinforcing rib in the vertical direction is also arranged between the partition board and the side wall;
the reinforced corrugated board sequentially comprises an outer surface paper 1, a first corrugated medium 2, a second corrugated medium 3 and an inner surface paper 4;
the even interval in surface that crest 2 of first wave corrugated medium and 3 corrugated medium of second deviate from each other is provided with strengthens the long piece, strengthen the long piece and set up along the wave extending direction of corrugated medium, the shape of first wave corrugated medium and second wave corrugated medium is the same, the crest of first wave corrugated medium and the crest of second wave corrugated medium are in the same perpendicular and completely cohere together.
Preferably, in the above-mentioned high strength corrugated box, baffle and strengthening rib are the craft paper.
Preferably, in the high-strength corrugated carton, the reinforcing long sheet is made of PVC.
The invention also provides a production method of the high-strength corrugated case, which comprises the following steps:
step S1, arranging a reinforcing long sheet on the surface of corrugated medium, obtaining first corrugated medium and second corrugated medium by using a corrugating machine, respectively spraying an adhesive on the first corrugated medium and the second corrugated medium, respectively adhering the first corrugated medium and the second corrugated medium to kraft paper, and completely adhering the peaks of the first corrugated medium and the second corrugated medium on the same vertical surface to obtain a reinforced corrugated board;
and S2, carrying out die cutting, indentation and box nailing/gluing on the reinforced corrugated board to obtain a corrugated case, and then adhering reinforcing ribs and partition plates on the surfaces of the corrugated cases, which are deviated from each other, to obtain the high-strength corrugated case.
Preferably, in the above method for producing a high-strength corrugated carton, the adhesive is prepared by mixing the following components in parts by weight: 1000-1300 parts of pure water, 400-500 parts of starch, 20-50 parts of liquid caustic soda, 10-20 parts of epoxidized soybean oil and 10-15 parts of glycerol.
Preferably, in the above method for producing a high-strength corrugated cardboard box, the step of obtaining the first corrugated medium and the second corrugated medium by using a corrugating machine after the reinforcing long sheet is provided on the surface of the corrugated medium includes: after the surface of the corrugated medium is provided with the reinforcing long sheet, the corrugated medium is subjected to pretreatment, moisture adjustment and ironing, and then is subjected to corrugating by using a corrugating machine to obtain first wavy corrugated medium and second wavy corrugated medium.
Preferably, in the above method for producing a high-strength corrugated cardboard box, the "spray adhesive" is specifically: spraying the adhesive on the two surfaces of the first corrugated medium and the second corrugated medium and one surface of the craft paper by atomizing with a high-pressure atomizing nozzle, wherein the spraying amount per square meter area is 0.03-0.05kg.
Example 1
The production method of the high-strength corrugated case comprises the following steps:
step S1, after the reinforcing long sheet is arranged on the surface of the corrugated medium, the corrugated medium is subjected to pretreatment, moisture adjustment and ironing, and then is subjected to corrugating by a corrugating machine, so that first wavy corrugated medium and second wavy corrugated medium are obtained.
After the surface of the corrugated medium is provided with the reinforcing long sheet, the corrugated medium is subjected to pretreatment, moisture adjustment and ironing, and then corrugated by a corrugating machine, so that first corrugated medium and second corrugated medium are obtained. Spraying the adhesive on the double surfaces of the first corrugated medium and the second corrugated medium and one surface of the craft paper in an atomized manner by using a high-pressure atomizing nozzle, wherein the spraying amount per square meter area is 0.03kg. Spraying an adhesive, and then respectively adhering the corrugated paper with the adhesive, and enabling the wave crests of the first wavy corrugated base paper and the wave crests of the second wavy corrugated base paper to be on the same vertical surface and completely adhered together to obtain a reinforced corrugated board;
the adhesive is prepared by uniformly mixing the following components in parts by weight: 1000 parts of pure water, 400 parts of starch, 20 parts of liquid caustic soda, 10 parts of epoxidized soybean oil and 10 parts of glycerol. The partition board and the reinforcing ribs are made of craft paper. The reinforcing long sheet is made of PVC.
And S2, carrying out die cutting, indentation and box nailing/gluing on the reinforced corrugated board to obtain a corrugated case, and then adhering reinforcing ribs and partition plates on the surfaces of the corrugated cases, which are deviated from each other, to obtain the high-strength corrugated case.
Example 2
The production method of the high-strength corrugated case comprises the following steps:
step S1, arranging a reinforcing long sheet on the surface of the corrugated medium, then arranging a reinforcing long sheet on the surface of the corrugated medium, pre-treating the corrugated medium to adjust moisture, ironing the corrugated medium, and then pressing the corrugated medium with a corrugating machine to form a first corrugated medium and a second corrugated medium.
After the surface of the corrugated medium is provided with the reinforcing long sheet, the corrugated medium is subjected to pretreatment, moisture adjustment and ironing, and then is subjected to corrugating by using a corrugating machine to obtain first wavy corrugated medium and second wavy corrugated medium. And atomizing the adhesive by using a high-pressure atomizing nozzle, and spraying the adhesive on the two surfaces of the first wavy corrugated medium and the second wavy corrugated medium and one surface of the kraft liner paper, wherein the spraying amount per square meter is 0.04kg. Spraying an adhesive, and then respectively adhering the corrugated paper with the adhesive, and enabling the wave crests of the first wavy corrugated base paper and the wave crests of the second wavy corrugated base paper to be on the same vertical surface and completely adhered together to obtain a reinforced corrugated board;
the adhesive is prepared by uniformly mixing the following components in parts by weight: 1200 parts of pure water, 450 parts of starch, 30 parts of liquid caustic soda, 15 parts of epoxidized soybean oil and 13 parts of glycerol. The baffle and the reinforcing ribs are made of kraft paper. The reinforcing long sheet is made of PVC.
And S2, carrying out die cutting, indentation and box nailing/gluing on the reinforced corrugated board to obtain a corrugated case, and then adhering reinforcing ribs and partition plates on the surfaces of the corrugated cases, which are deviated from each other, to obtain the high-strength corrugated case.
Example 3
The production method of the high-strength corrugated case comprises the following steps:
step S1, arranging a reinforcing long sheet on the surface of the corrugated medium, then arranging a reinforcing long sheet on the surface of the corrugated medium, pre-treating the corrugated medium to adjust moisture, ironing the corrugated medium, and then pressing the corrugated medium with a corrugating machine to form a first corrugated medium and a second corrugated medium.
After the surface of the corrugated medium is provided with the reinforcing long sheet, the corrugated medium is subjected to pretreatment, moisture adjustment and ironing, and then is subjected to corrugating by using a corrugating machine to obtain first wavy corrugated medium and second wavy corrugated medium. And atomizing the adhesive by using a high-pressure atomizing nozzle, and spraying the adhesive on the two surfaces of the first wavy corrugated medium and the second wavy corrugated medium and one surface of the kraft liner paper, wherein the spraying amount per square meter is 0.05kg. Spraying an adhesive, and then respectively adhering the corrugated paper with the adhesive, and enabling the wave crests of the first wavy corrugated base paper and the wave crests of the second wavy corrugated base paper to be on the same vertical surface and completely adhered together to obtain a reinforced corrugated board;
the adhesive is prepared by uniformly mixing the following components in parts by weight: 1300 parts of pure water, 500 parts of starch, 50 parts of liquid caustic soda, 20 parts of epoxidized soybean oil and 15 parts of glycerol. The baffle and the reinforcing ribs are made of kraft paper. The reinforcing long sheet is made of PVC.
And S2, carrying out die cutting, indentation and box nailing/sticking on the reinforced corrugated board to obtain a corrugated case, and then adhering reinforcing ribs and partition plates on the surfaces of the corrugated cases which are deviated from each other to obtain the high-strength corrugated case.
In conclusion, compared with the prior art, the reinforced corrugated board of the high-strength corrugated case saves interlayer paper between two layers of corrugated base paper, and improves the ratio of the compressive strength to the weight of the reinforced corrugated board by using the arrangement structure of the corrugated base paper of the invention in combination with the removal of the interlayer paper. Furthermore, the strength of the corrugated medium is increased by utilizing the reinforcing long sheet, and the corrugated medium can bear larger pressure by matching with a structure that wave crests of the wavy corrugated medium are abutted, so that the corrugated medium is not easy to deform, and the compressive strength of the obtained corrugated board is 2-5 times that of a common corrugated board with the same thickness. The corrugated board of the high-strength corrugated case is provided with the partition boards and the reinforcing ribs in the vertical direction to strengthen the bearing in the vertical direction, and a space is formed between the partition boards and the reinforcing ribs, so that the corrugated board plays a good role in heavy buffering and shock resistance.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention and the contents of the accompanying drawings, which are directly or indirectly applied to the related technical fields, are included in the scope of the present invention.
Claims (4)
1. A method for producing a high-strength corrugated carton, characterized in that the high-strength corrugated carton comprises a bottom layer, side walls and a surface layer; the bottom layer, the side wall and the surface layer are made of reinforced corrugated boards; the surfaces of the side walls, which are deviated from each other, are also provided with a support reinforcing structure, the support reinforcing structure comprises a partition board correspondingly attached to the inner side surface of the side wall, and a reinforcing rib in the vertical direction is arranged between the partition board and the side wall;
the reinforced corrugated board sequentially comprises outer-layer surface paper, first wavy corrugated base paper, second wavy corrugated base paper and inner-layer surface paper;
reinforcing long pieces are uniformly arranged on the surfaces of the wave crests of the first wavy corrugated medium and the surfaces of the second wavy corrugated medium, which are deviated from each other, at intervals, the reinforcing long pieces are arranged along the wave extension direction of the corrugated medium, the shapes of the first wavy corrugated medium and the second wavy corrugated medium are the same, and the wave crests of the first wavy corrugated medium and the wave crests of the second wavy corrugated medium are completely adhered together on the same vertical surface;
the partition plate and the reinforcing ribs are made of kraft paper;
the reinforcing long sheet is made of PVC;
the production method comprises the following steps:
step S1, arranging a reinforcing long sheet on the surface of corrugated medium, obtaining first wavy corrugated medium and second wavy corrugated medium by using a corrugating machine, respectively spraying an adhesive on the first wavy corrugated medium and the second wavy corrugated medium, respectively adhering the first wavy corrugated medium and the second wavy corrugated medium to kraft paper, and completely adhering the wave crests of the first wavy corrugated medium and the wave crests of the second wavy corrugated medium on the same vertical surface to obtain a reinforced corrugated board;
and S2, carrying out die cutting, indentation and box nailing/gluing on the reinforced corrugated board to obtain a corrugated case, and then adhering reinforcing ribs and partition plates on the surfaces of the corrugated cases, which are deviated from each other, to obtain the high-strength corrugated case.
2. The method for producing a high-strength corrugated box according to claim 1, wherein the adhesive is prepared by uniformly mixing the following components in parts by weight: 1000-1300 parts of pure water, 400-500 parts of starch, 20-50 parts of liquid caustic soda, 10-20 parts of epoxidized soybean oil and 10-15 parts of glycerol.
3. The method for producing a high-strength corrugated paper box according to claim 1, wherein the step of obtaining the first corrugated medium sheet and the second corrugated medium sheet by a corrugating machine after providing the reinforcing long sheet on the surface of the corrugated medium sheet is specifically: after the surface of the corrugated medium is provided with the reinforcing long sheet, the corrugated medium is subjected to pretreatment, moisture adjustment and ironing, and then is subjected to corrugating by using a corrugating machine to obtain first wavy corrugated medium and second wavy corrugated medium.
4. The method for producing a high-strength corrugated carton according to claim 1, wherein the "spray adhesive" is specifically: spraying the adhesive on the two surfaces of the first corrugated medium and the second corrugated medium and one surface of the craft paper by atomizing with a high-pressure atomizing nozzle, wherein the spraying amount per square meter area is 0.03-0.05kg.
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| CN113463442B true CN113463442B (en) | 2023-01-03 |
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| CN114104460A (en) * | 2021-12-13 | 2022-03-01 | 厦门合兴实业有限公司 | Green recyclable and degradable corrugated carton and production method thereof |
| CN115679750A (en) * | 2022-10-12 | 2023-02-03 | 琼海恒昇纸业有限公司 | Degradable carton and production method thereof |
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| CN205326422U (en) * | 2016-01-21 | 2016-06-22 | 北京京东方显示技术有限公司 | Corrugated cardboard |
| CN108179661B (en) * | 2018-01-15 | 2020-08-07 | 特耐王包装（福州）有限公司 | High-strength waterproof multilayer composite corrugated board |
| CN108943954A (en) * | 2018-08-15 | 2018-12-07 | 芜湖横路新材料科技有限公司 | A kind of bilayer V-type corrugated board and its production method |
| CN110561827A (en) * | 2019-09-04 | 2019-12-13 | 云南瑞升纸业有限公司 | Corrugated carton with high compressive strength and preparation process thereof |
| CN211363823U (en) * | 2019-10-29 | 2020-08-28 | 珠海正业包装有限公司 | High-strength anti-breaking corrugated paper box |
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