Special high-strength moisture-proof corrugated carton for potatoes and preparation method thereof

Abstract

The invention discloses a special high-strength moisture-proof corrugated carton for potatoes and a preparation method of the special high-strength moisture-proof corrugated carton, which are used for developing customized packaging demand research by researching the influence of corrugated paper corrugation and carton structure on strength. The preparation method comprises the following steps: carefully selecting raw materials, such as surface paper and inner paper, which meet standards, as well as an adhesive, ink and gloss oil; the edge type parameters of the BE edge type of the five-layer paperboard are optimized through experiments, and the optimal edge width, the optimal edge height and the optimal edge peak radius are determined; in the carton forming process, accurate printing, film covering, cutting, creasing and carton sticking operations are carried out. The manufactured carton product is good in appearance, meets strict standards in size, performance, bonding performance and the like, has the characteristics of high strength, high moisture resistance and good customization, can effectively protect the quality of potatoes in the storage and transportation process, improve the transportation efficiency and reduce the cargo loss, has the advantage of environmental protection, can be recycled, regenerated and recycled, and is suitable for large-scale popularization and application. The method has a wide application prospect in potato packaging and related fields.

Description

Technical Field

[0001] The present invention belongs to the field of corrugated packaging technology, and specifically relates to the structural design and preparation process of a corrugated paper box. In particular, it relates to a high-strength moisture-proof corrugated paper box specially for potatoes and a preparation method thereof. Background Art

[0002] Packaging is always present in the entire logistics process. When packaging products, the packaging materials, packaging containers, packaging technology and packaging structure used will have a direct impact on the efficiency and quality of the basic functions of loading and unloading, handling, storage, distribution and transportation in the logistics system, and are related to the entire logistics service level, economic benefits and social benefits. High-strength corrugated boxes can not only ensure the safe transportation of goods, but also be recycled and reused, which is green and environmentally friendly.

[0003] The corrugated packaging industry is an important part of China's manufacturing industry and one of the supporting service industries. It involves the production, circulation, trade, consumption of various products, and the recycling of waste materials, etc., and the market demand for products is large. At present, the corrugated packaging industry has problems such as low quality of corrugated cardboard products and large material consumption in the production process. In view of the above problems, the present invention conducts research on the factors affecting the strength of carton boxes, intends to carry out technical research and development on the corrugated production process, and studies the influence of three quantities of different flute width, flute height and flute peak radius on the edge compression strength. Through the implementation of the invention, the process optimization and improvement of the existing production line is completed, and the higher the basis weight of the same material of base paper, the higher the edge compression strength of the corrugated cardboard produced, the higher the edge compression strength, the better the product quality, and saves production materials. The present invention conducts research on carton structure and customized packaging needs to improve product strength. Through different index parameters such as moisture and volume of the product, different combinations of materials, thickness, etc. of corrugated box packaging are studied to achieve characteristic packaging of characteristic products, which will maximize the retention of product performance.

[0004] Chinese patent application number CN201710160533.0, entitled “A method for preparing high-strength moisture-proof corrugated paperboard boxes” solves the shortcomings of existing corrugated paperboard boxes in terms of moisture resistance and strength, but its bonding and reinforcement methods are too complicated. Chinese patent application number CN201910522458.6, entitled “Process for preparing environmentally friendly high-strength corrugated paperboard boxes” solves the technical problems of high-strength and recyclable paperboard boxes, but the structure and design of the product still cannot meet the demand. Chinese patent application number CN202110854567.3, entitled “A method for preparing multifunctional high-strength corrugated paperboard boxes” solves the strength problem, but does not involve technical problems related to moisture resistance and recyclability.

[0005] The corrugated packaging industry occupies an important position in my country's manufacturing industry, but there are currently problems such as low quality of corrugated cardboard products and large material consumption. At the same time, with the increasing market demand for packaging of various products, especially for the requirements of packaging strength and moisture resistance of agricultural products such as potatoes during storage and transportation, existing corrugated boxes are difficult to meet. For example, when ordinary cartons are used to package products such as potatoes with high moisture content, they easily absorb water, become soft and deform, resulting in reduced compressive strength and affecting product quality. Therefore, it is of great significance to develop a method for preparing high-strength moisture-proof corrugated boxes.

[0006] The new technology and process developed by the present invention can significantly reduce production costs and the utilization rate of waste at the back end, and can significantly reduce the consumption of resources and energy in the production process. The packaging products developed by the present invention can be recycled, reused and remanufactured. The technology and products of the present invention are urgently needed by enterprises.

[0007] In view of the defects of the above-mentioned existing high-strength moisture-proof corrugated paper boxes for potatoes and their preparation methods, the present invention mainly aims at the problems of low compressive strength and low recycling rate of current corrugated paper box products, and carries out research on the influence of corrugated paper shape and paper box structure on paper box strength and research on customized packaging of special products, optimizes the technical parameters of paper box products, forms the best corrugated paperboard production process, and achieves the purpose of improving the compressive strength of paper boxes. Summary of the invention

[0008] The main purpose of the present invention is to overcome the defects of the existing high-strength moisture-proof corrugated paper box for potatoes and provide a new high-strength moisture-proof corrugated paper box for potatoes. The technical problem to be solved is to provide a high-strength corrugated paper box, the product performance of which meets the requirements of national standard corrugated paper board (GB / T6544-2008) and single-layer and double-layer corrugated paper boxes for transportation packaging (GB / T6543-2008), so that it is more suitable for practical use and has industrial utilization value.

[0009] Another object of the present invention is to provide a high-strength moisture-proof corrugated paper box specially for potatoes. The technical problem to be solved is to provide a five-layer paperboard BE flute type with high strength and good buffering performance, which is more suitable for practical use.

[0010] Another object of the present invention is to provide a method for preparing a high-strength moisture-proof corrugated paper box for potatoes. The technical problem to be solved is to accurately optimize the flute height and flute width parameters of the BE flute type of five-layer paperboard through orthogonal experimental design, achieve a significant improvement in edge pressure strength and bursting strength, and maintain good cushioning performance. By adjusting the various parameters of corrugated paper, the ratio of edge pressure strength to shrinkage rate is optimized, thereby improving the mechanical properties of corrugated paper.

[0011] Another object of the present invention is to provide a method for preparing a high-strength moisture-proof corrugated paper box specifically for potatoes. The technical problem to be solved is to design the specific parameters of the circumference and aspect ratio of the corrugated paper box through the change curve of the compressive strength and in combination with the size and shape of the packaged product, so as to improve the compressive strength of the product.

[0012] Another object of the present invention is to provide a method for preparing a high-strength moisture-proof corrugated paper box for potatoes. The technical problem to be solved is to carry out research on customized packaging needs, target different index parameters such as moisture and volume of the product, study different combinations of materials, thickness, etc. of corrugated paper box packaging, achieve special packaging for special products, maximize the retention of product performance, and thus be more suitable for practical use.

[0013] The purpose of the present invention and the technical problems solved are achieved by adopting the following technical solutions. A high-strength moisture-proof corrugated paper box for potatoes proposed in the present invention includes: a paper box structure, which is designed with a specific perimeter and aspect ratio, wherein the aspect ratio is between 1.2-1.5 to improve the compressive strength of the paper box; a corrugated paper board, which adopts a five-layer paper board BE flute type, and is designed after optimizing the flute height and flute width parameters to achieve a significant improvement in edge pressure strength and bursting strength, while maintaining good buffering performance; a moisture-proof layer, which is coated on the surface of the corrugated paper board and adopts moisture-proof varnish to ensure that there is no mesh penetration phenomenon 120 seconds after dripping water, thereby improving the moisture-proof performance of the paper box; and an adhesive, which adopts an adhesive that complies with the relevant laws, regulations and standards for food packaging to ensure that the layers of paper boards in the paper box are firmly bonded without debonding.

[0014] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0015] The above-mentioned high-strength moisture-proof corrugated paper box for potatoes, wherein the surface of the paper box should be clean without stains, scratches or damage, the printing on the page should be clear, bright and complete, and the cutting should be neat, and the indentation line should not be cracked or broken.

[0016] The above-mentioned high-strength moisture-proof corrugated paper box for potatoes has an empty box compressive strength of not less than 4000N, an edge pressure strength of not less than 8000N / m, a bursting strength of not less than 1000KPa, and a paperboard moisture content between 5% and 10%.

[0017] The above-mentioned high-strength moisture-proof corrugated paper box for potatoes, wherein the paper box meets the following quality requirements: Product appearance: the surface is clean without stains, scratches, or damage, the cutting is neat, there is no serious burrs or residual edge strips, and the indentation line shall not be cracked or broken; the layout printing is clear, bright, and complete, the overprint is accurate, the color is consistent with the specified Pantone color number, and there is no mixed color or serious fading; Carton cutting and indentation line: the cutting gap width is 7mm (±2mm error is allowed), the indentation line is a flat mold, the width shall not be greater than 17mm, and the fold line shall be centered; Forming requirements: after folding and forming, it should be Square, the cut parts and edges of each face must be at right angles to each other, a small number of special-shaped boxes are allowed (≤1%); the gap between the flaps is no more than 12mm, a small number of non-conforming items are allowed (<5%); the flaps are opened and closed 180° for 5 times repeatedly, and cracking is not allowed, a small number of non-conforming items are allowed (≤1%); holes and sealing at the overlapped corners: the diameter of the holes at the overlapped corners after the box is made shall not exceed 5mm; the width of the sealing tape reserved for the two bottom flaps is 50mm (25mm for a single flap), and the length and width of the sealing tape reserved on the two sides are 50mm (error +10mm), and the side lines are opposite Product size and performance: the inner diameter is consistent with the size marked on the drawing during plate making, with an allowable error of ±5mm; the outer diameter is 10, 10, and 15mm longer, 10, and 15mm higher than the inner diameter, with an allowable error of ±5mm; the empty box compression is ≥4000N; the edge compression strength is ≥8000N / M; the bursting strength is ≥1000KPa; the cardboard moisture is 5%-10%; the waterproof performance is that there is no mesh penetration after 120 seconds of dripping water at the place where moisture-proof varnish is applied; the bonding performance: the bonding width is not less than 30mm, the adhesive is evenly applied, there is no excess overflow, and it does not cause the inside or outside of the carton The cartons are sticky without any glue marks or color reactions, the bonding is firm and there is no debonding. At least 90% of the bonding surface is destroyed when peeling. A small amount of debonding can be accepted (≤1%). The width of the gap at the bonding point is consistent, with a width of 7mm (±3mm error is allowed), and the center line of the indentation line is not exposed. The bonding strength of each layer of cardboard is good, and at least 95% of the bonding surface is destroyed when peeling; and raw material properties: the paper quality meets the detailed requirements for the weight and material of the face paper, lining paper, interlayer paper, B flute and E flute. The glue quality, ink quality and varnish quality all meet the relevant laws, regulations and standards for food packaging.

[0018] The purpose of the present invention and the technical problem solved by the present invention are also achieved by adopting the following technical solutions. According to the method for preparing a high-strength moisture-proof corrugated paper box for potatoes proposed by the present invention, the method comprises the following steps:

[0019] Raw material selection: including selecting face paper, lining paper, interlayer paper, B-flute paper and / or E-flute paper that meet specific grammage and material requirements, where the face paper, lining paper and interlayer paper have good strength, toughness and moisture resistance, and the flute parameters of B-flute paper and E-flute paper are determined based on experimental optimization; using adhesives that comply with the relevant laws, regulations and standards for food packaging; selecting inks and varnishes that comply with the relevant laws, regulations and standards for food packaging;

[0020] Production of corrugated cardboard: A five-layer cardboard BE flute was selected for experimental testing. The effects of different flute widths, flute heights, and flute peak radii on edge compression strength and shrinkage were studied by designing orthogonal experiments and single-factor designs. The best flute parameters for the mechanical properties of the five-layer cardboard BE flute were obtained. The flute parameters were B flute width 5.6mm, flute height 2.8mm, E flute 3.3mm, and flute height 1.6mm. The selected face paper, lining paper, and interlayer paper were combined with the designed B flute and E flute paper, and the corrugated cardboard was formed through preheating, gluing, bonding, and drying processes.

[0021] Carton forming and processing: Printing is performed on the surface of corrugated cardboard to ensure that the layout information is clear, accurate, complete and the color meets the requirements. After printing, the cardboard is placed on a laminating machine and coated with a matte film to enhance the wear resistance, folding resistance, tensile strength and moisture resistance of the packaging box.

[0022] Cut and creasing the corrugated cardboard according to the requirements that the cutting gap width is 7mm (±2mm error is allowed), the creasing line is a flat die with a width not greater than 17mm and the fold line is centered;

[0023] The corrugated cardboard is glued together end to end by roller coating, the width of the overlapping tongue edge is not less than 30mm, the adhesive is evenly applied without excess overflow, the bonding is firm without debonding, at least 90% of the bonding surface is destroyed when peeling, the gap width at the bonding point is 7mm (±3mm error is allowed) and the center line of the indentation line is not exposed, the bonding firmness of each layer of cardboard is good, and at least 95% of the bonding surface is destroyed when peeling.

[0024] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0025] The above-mentioned method for preparing the high-strength moisture-proof corrugated paper box for potatoes, wherein the ink is used to print product information and logos clearly and accurately, and the varnish is used to improve the moisture-proof and wear-resistant properties of the paper box surface.

[0026] The aforementioned method for preparing a high-strength moisture-proof corrugated paperboard box for potatoes, wherein during the corrugated paperboard production process, a standardized test method is used to measure the edge compression strength, bursting strength and bonding strength of five-layer paperboard BE flute samples produced with different flute parameter combinations. The edge compression strength test uses an edge compression strength testing machine, the bursting strength test uses a bursting strength testing machine, and the bonding strength test is carried out using specific equipment.

[0027] The above-mentioned preparation method of high-strength moisture-proof corrugated paperboard box for potatoes, wherein the printing operation in the paperboard forming and processing process requires adjusting the printing machine parameters to ensure the printing quality, the laminating operation ensures that the film and the paperboard are tightly fitted without defects, the cutting operation ensures that the cutting surface is neat and smooth, the creasing operation makes the folding line clear and the paperboard is not cracked or broken, and the gluing operation achieves efficient and high-quality gluing through a fully automatic paperboard gluing machine.

[0028] The method for preparing the above-mentioned high-strength moisture-proof corrugated paper box for potatoes further comprises the following steps:

[0029] Corrugated cardboard preparation: using a five-layer cardboard BE flute production line, production is carried out according to the preset flute height and flute width parameters to optimize the mechanical properties of the corrugated cardboard;

[0030] Moisture-proof treatment: Apply moisture-proof varnish on the surface of corrugated cardboard to form a moisture-proof layer;

[0031] Printing and cutting: Printing according to design requirements and cutting according to preset sizes and shapes;

[0032] Forming and gluing: Folding and gluing the cut corrugated cardboard to form a carton structure with a specific perimeter and aspect ratio;

[0033] Quality inspection: Carry out quality inspection on the manufactured cartons to ensure that they meet the preset performance requirements.

[0034] In the aforementioned method for preparing a high-strength moisture-proof corrugated paperboard box for potatoes, the flute height and flute width parameters of the corrugated paperboard are optimized by orthogonal experimental design to achieve a significant improvement in edge compression strength and bursting strength.

[0035] Compared with the prior art, the present invention has obvious advantages and beneficial effects. From the above technical scheme, it can be seen that in order to achieve the above-mentioned invention purpose, the main technical contents of the present invention are as follows:

[0036] The present invention provides a high-strength moisture-proof corrugated paper box specially used for potatoes and a preparation method thereof, which solves the following technical problems.

[0037] (1) The influence of corrugated paper flute shape on carton strength. The quantitativeness of corrugated base paper is the main factor affecting the strength of corrugated board. Practice has shown that the higher the quantitativeness of the base paper of the same material, the higher the edge compression strength and the higher the edge compression strength of the corrugated board produced. Different flute types have different cushioning properties, and their impact resistance and vibration energy absorption are also different. For this reason, a five-layer cardboard BE flute type was selected for experimental testing to study the effects of three quantities, namely, different flute widths, flute heights and flute peak radii, on the edge compression strength, so as to provide data support for the trial production of the final pilot product. The invention tests the edge compression strength, bursting strength and bonding strength of the five-layer cardboard BE flute type at different flute heights and flute widths by designing orthogonal experiments and single-factor designs, and obtains the flute type parameters with the best mechanical properties of the five-layer cardboard BE flute type, and designs a five-layer cardboard BE flute type with high strength and good cushioning properties.

[0038] (2) The influence of corrugated cardboard structure on the strength of the cardboard. The circumference of the cardboard box and the compressive strength will form a change curve. The compressive strength will continue to increase as the circumference of the cardboard box is extended in the early stage. However, when the circumference exceeds the critical value, the more conventional the circumference is, the more unstable the cardboard box will become, and the instability will increase. Its compressive strength is inversely proportional to the extension of the circumference. Studies have shown that when the length-to-width ratio of the cardboard box is between 1.2 and 1.5, the compressive strength of the cardboard box presents the highest value. A length-to-width ratio exceeding or below this ratio will reduce the compressive strength of the cardboard box. The present invention combines the size and shape of the required packaging product to conduct research on the influence of the circumference and length-to-width ratio of the cardboard box on the compressive strength of the cardboard box, so as to achieve the purpose of improving the strength of the cardboard box.

[0039] (3) Research on improving the strength of cartons for customized packaging of specialty products. Major agricultural products such as fruits, beef, mutton, vegetables, etc. have high water content. During storage and transportation, the water evaporates continuously, which will cause ordinary cartons and other packaging materials to absorb water, soften and deform, resulting in a decrease in the compressive strength of the cartons, and even mold, affecting the quality of the products. Based on the above problems, the present invention conducts research on customized packaging needs for different specialty industries such as cold vegetables, red plum apricots, beef, mutton, and Chinese medicinal materials. Through different indicator parameters such as moisture and volume of the product, different combinations of materials, thickness, etc. of corrugated carton packaging are studied to achieve characteristic packaging of specialty products, which will maximize the retention of product performance.

[0040] The present invention studies the influence of different flute types of corrugated paper packaging boxes on the edge compression strength and shrinkage rate of products. The proposed technical scheme accurately determines the flute type parameters, measures the edge compression strength and shrinkage rate using standardized test methods, and analyzes the influence of the flute type design on the protective performance of the product, thereby revealing the correlation between the flute type and performance.

[0041] The invention provides a high-strength moisture-proof corrugated paper box for potatoes and a preparation method thereof, and the innovative points thereof include the following aspects.

[0042] (1) Research on key technologies for reducing consumption in corrugated box production: Through orthogonal experimental design, the height and width parameters of the BE flute of five-layer paperboard were accurately optimized, achieving a significant increase in edge pressure strength and bursting strength while maintaining good cushioning performance. By adjusting the various parameters of corrugated paper, the ratio of edge pressure strength to shrinkage rate was optimized, thereby improving the mechanical properties of corrugated paper.

[0043] (2) By combining the compressive strength curve with the size and shape of the packaging product, the specific parameters of the circumference and aspect ratio of the corrugated box are designed to improve the compressive strength of the product.

[0044] (3) Conduct research on customized packaging needs. Based on different parameters such as moisture and volume of the product, study different combinations of materials and thickness of corrugated box packaging to achieve special packaging for special products, which will maximize the performance of the product.

[0045] The present invention proposes a high-strength moisture-proof corrugated paper box for potatoes and the key technical points of the preparation method thereof include:

[0046] (1) Laminating technology: Laminating is a product processing technology that combines paper and plastic by covering the surface of printed materials with a layer of transparent plastic film. Place the packaging box cardboard after hot stamping and cooling on the laminating machine, start the motor to transport the cardboard to the laminating area for lamination, and collect the paper after hot knife cutting. After the packaging box is coated with matte film, its wear resistance, folding resistance, tensile resistance and moisture resistance are greatly enhanced, which not only protects the appearance of the packaging box, but also increases its service life.

[0047] (2) Carton gluing technology. After roller gluing, the corrugated cardboard is glued together end to end to form a shape. The corrugated cardboard is transported to the roller by a conveyor belt for gluing and folding, and then stacked and counted. It is then packaged in a certain quantity and palletized by a robot. The fully automatic carton gluing machine reduces the reliance on a large number of skilled carton gluing workers, greatly improving work efficiency and product quality.

[0048] As can be seen from the above, the present invention discloses a high-strength moisture-proof corrugated paper box for potatoes and a preparation method thereof. In view of the problems of low compressive strength, low recycling rate and insufficient moisture-proof performance of existing corrugated paper boxes, the present invention studies the influence of corrugated paper flute shape and carton structure on strength, and conducts customized packaging demand research. In terms of the preparation method, carefully select raw materials such as face paper, lining paper, adhesive, ink, and varnish that meet the standards; optimize the flute parameters of the five-layer cardboard BE flute type through experiments to determine the optimal flute width, flute height and flute peak radius; in the carton forming process, perform precise printing, laminating, cutting, creasing and gluing operations. The obtained carton product has a good appearance, and its size, performance and bonding performance all meet strict standards. It has high strength, high moisture resistance and good customization characteristics. It can effectively protect the quality of potatoes during storage and transportation, improve transportation efficiency, and reduce cargo losses. At the same time, it has environmental protection advantages and can be recycled and reused. It has broad application prospects in potato packaging and related fields.

[0049] By means of the above technical scheme, the potato-specific high-strength moisture-proof corrugated paper box and the preparation method thereof of the present invention have at least the following advantages:

[0050] (1) The high-strength moisture-proof corrugated paper box specially used for potatoes of the present invention forms a high-strength corrugated paper box, and the product performance meets the requirements of the national standard corrugated paper board (GB / T6544-2008) and the single-layer and double-layer corrugated paper boxes for transportation packaging (GB / T6543-2008).

[0051] (2) Technical benefits

[0052] This invention studies parameters such as the edge compression strength and shrinkage rate of corrugated cardboard boxes, makes technical improvements and optimizations to the corrugated cardboard production line, analyzes parameters such as the corrugated paper flute width, flute height, flute peak radius, and the circumference and aspect ratio of the cardboard boxes, and improves the performance of corrugated cardboard products. Through the research and development of high-strength corrugated paperboard production and processing technology, the compression resistance, edge pressure strength and burst resistance of corrugated paperboard can be effectively improved. It is expected that the performance of the three-layer and five-layer corrugated paperboard produced by the company will exceed the qualified product quality specified in GB / T6544-2008 "Corrugated Paperboard". Taking the double corrugated paperboard (5 layers) for packaging and transportation as an example, the length and deviation of the dimensions are 489mm, 380mm, and 175mm, and the product compression strength is 4452N, and the national standard is 4000N. When the thickness of the corrugated paperboard used is 6.8mm, the burst strength is 845KPa, and the national standard is 800N, the edge pressure strength is 8.18KN / m, and the national standard is 8.00KN / m, and the bonding strength is 525N / m, and the national standard is 500N / m. The product quality is better than the national standard. Good product performance can reduce the damage rate of packaging boxes during transportation, improve transportation efficiency, reduce production costs, and improve the market competitiveness of products.

[0053] (3) Economic Benefits

[0054] The present invention conducts research on high-performance corrugated paper packaging boxes, which is in line with the trend of economic development. By providing good packaging carton products, the loss of goods and the return rate caused by packaging damage can be reduced, and the transportation efficiency of goods can be improved. By conducting research on improving the performance strength of corrugated paper boxes, the mechanical properties of cartons can be improved under the same raw materials, which is beneficial to reducing the production costs of enterprises. Therefore, the implementation of the invention has broad market prospects and significant economic benefits. Through the implementation of the invention, packaging products suitable for high-end specialty industries such as fruits, vegetables, Chinese medicinal materials, beef and mutton are developed, which can not only reduce the loss of products during long-distance transportation, but also promote the specialty industries. Through the invention, the annual income growth is expected to reach 1 million yuan, and the indirect benefits involving beef cattle, cold vegetables and other fields will reach more than 100 million yuan. The economic benefits of the implementation of the invention are very significant.

[0055] (4) Social benefits

[0056] The new technology and process developed by the present invention can greatly improve the utilization rate of raw materials at the front end of the production process and waste at the back end, and can greatly reduce the consumption of resources and energy in the production process. The packaging products developed by the invention can be recycled, reused and remanufactured. The invented technology and products are urgently needed by enterprises. It provides strong support for the development of characteristic industries. The implementation of the present invention is conducive to the integrated development of multiple productions, provides 5 jobs for the region, and the number of temporary workers exceeds 30, realizing employment at the doorstep, which is conducive to cultivating new economic growth points and plays an important role in promoting the development of characteristic economy.

[0057] (5) Prospects for promotion, application and industrialization

[0058] The technical achievements of the present invention can be directly applied to production, and have obvious technical, economic and social benefits. The present invention is closely connected with the development of characteristic industries, and is a technical problem that urgently needs to be solved in this field, realizing the sustainable development of the paper product packaging industry, accelerating the promotion of characteristic products, and having important practical significance for achieving economic growth.

[0059] In summary, the special high-strength moisture-proof corrugated paper box for potatoes of the present invention and its preparation method have the above-mentioned advantages and practical values, and are therefore more suitable for practical use and have wide industrial utilization value. It is truly a novel, progressive and practical new design.

[0060] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail as follows. DETAILED DESCRIPTION

[0061] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods of the potato-specific high-strength moisture-proof corrugated paper box and its preparation method proposed by the present invention are described in detail below in combination with the preferred embodiments.

[0062] The preparation method of the present invention is described in detail below in conjunction with specific experiments and production processes:

[0063] Example 1

[0064] (1) Raw material preparation

[0065] Purchase face paper, lining paper, interlayer paper, B-flute paper, and E-flute paper according to the design requirements, and ensure that the weight and material of the paper meet the standards. For example, the face paper can be made of paper with a higher basis weight and better strength to provide the outer surface strength of the carton; the lining paper can be made of paper with a certain moisture-proof performance to protect the potatoes inside from moisture.

[0066] Choose adhesives that meet food packaging safety standards, such as water-based adhesives, to ensure that they have good bonding properties and are non-toxic and harmless.

[0067] Prepare ink and varnish that meet the standards. The ink is used to print product information and logos clearly and accurately, and the varnish is used to improve the moisture and wear resistance of the carton surface.

[0068] (2) Corrugated cardboard production experiment

[0069] Set different combinations of flute width, flute height and flute peak radius parameters to conduct a five-layer paperboard BE flute production experiment. For example, set multiple groups of different flute width values ​​(such as 3mm, 4mm, 5mm, etc.), flute height values ​​(such as 2mm, 3mm, 4mm, etc.) and flute peak radius values ​​(such as 1mm, 1.5mm, 2mm, etc.).

[0070] For each set of parameters, the five-layer BE fluted paperboard samples were made, and their edge compression strength, bursting strength and bonding strength were measured using standardized test methods. The edge compression strength test was carried out in accordance with relevant national standards, using an edge compression strength tester to apply pressure to the sample and record the maximum pressure value when the sample was broken; the bursting strength test used a bursting strength tester to apply uniform pressure to the sample through a hydraulic system until the sample broke, and the pressure value at the time of rupture was measured; the bonding strength test used a specific device to measure the bonding strength between the layers of the corrugated paperboard.

[0071] According to the test results, the influence of different parameter combinations on the mechanical properties of the BE flute of five-layer cardboard was analyzed to determine the best flute parameter combination for mechanical properties. For example, after many experiments and data analysis, it was found that when the flute width was 4mm, the flute height was 3mm, and the flute peak radius was 1.5mm, the edge compression strength, bursting strength and bonding strength of the BE flute of five-layer cardboard were the best.

[0072] (3) Carton forming and processing operations

[0073] First comes printing and optional lamination.

[0074] Place the prepared corrugated cardboard on the printing press and print according to the design template. Adjust the parameters of the printing press to ensure that the printing pressure, ink volume, printing speed, etc. are appropriate, so that the layout information is printed clearly and accurately, the color is bright and meets the specified Pantone color number.

[0075] Optional lamination. After printing, feed the cardboard into the laminating machine. Install the matte film on the laminating machine, start the motor, and let the cardboard pass through the laminating area smoothly to ensure that the film fits the cardboard tightly without bubbles, wrinkles and other defects. After hot knife cutting, remove the excess film edge to obtain the laminated corrugated cardboard.

[0076] Next, cutting and creasing are performed.

[0077] Use professional carton cutting equipment to cut the laminated corrugated cardboard according to the predetermined size requirements. During the cutting process, strictly control the cutting gap width to about 7mm, and allow an error range of ±2mm. By accurately adjusting the position and depth of the cutting tool, ensure that the cutting surface is neat and smooth without serious burrs or residual strips.

[0078] At the same time, the corrugated cardboard is creasing. A flat die creasing tool is used to control the width of the creasing line to no more than 17mm, and ensure that the fold line is centered. The creasing depth should be moderate, which can ensure that the fold line is clear and easy to form when the carton is folded, and will not cause the cardboard to crack or break.

[0079] Third, glue the boxes.

[0080] The cut and crimped corrugated cardboard is transported to the roller gluing area of ​​the fully automatic carton gluer. The roller gluing device evenly applies adhesive to the parts of the cardboard that need to be glued according to the set parameters, ensuring that the adhesive coating amount is moderate, there is no excess overflow, no sticking inside or between cartons, no glue marks or mixed color reactions.

[0081] The glued cardboard is automatically folded under the action of the conveyor belt, so that the head and tail parts are tightly bonded together to form a carton shape. During the bonding process, ensure that the width of the carton joint is not less than 30mm, and the bonding is firm without debonding. The formed cartons are counted by the stacking counting device, and they are packaged after reaching a certain number. Finally, the packaged cartons are neatly stacked and stored by the robot, waiting for subsequent use or shipment.

[0082] During the entire preparation process, the above steps and process parameters are strictly followed to ensure that the high-strength moisture-proof corrugated paper boxes for potatoes meet the quality requirements, including clean and tidy product appearance, clear and accurate printing, up-to-standard size and performance, firm and reliable bonding, and raw materials that meet safety standards. At the same time, quality inspections and process optimization are continuously carried out during the production process to improve product quality and production efficiency.

[0083] Example 2

[0084] (1) Carton structure design

[0085] High-strength design: By optimizing the perimeter, aspect ratio and other parameters of the carton, the compressive strength of the carton is improved. Studies have shown that the compressive strength of the carton is highest when the aspect ratio is between 1.2-1.5.

[0086] Moisture-proof design: The surface of the carton is coated with moisture-proof varnish to form a waterproof layer, which effectively prevents moisture penetration.

[0087] Customized design: According to the characteristics of agricultural products such as potatoes, such as moisture and volume, we design cartons of different materials and thicknesses to achieve special packaging for special products.

[0088] (2) Corrugated board preparation process

[0089] Raw material selection: Use high-quality corrugated paper to ensure the strength and stability of the carton.

[0090] Fluting optimization: Through orthogonal experimental design, the fluting height and fluting width parameters of the five-layer cardboard BE fluting type are accurately optimized to improve the edge pressure strength and bursting strength.

[0091] Bonding technology: Adhesives that meet food packaging requirements are used to ensure the firmness of the bonding between the layers of the carton.

[0092] (3) Key technical points

[0093] Laminating technology: Cover the surface of the carton with a layer of transparent plastic film to improve the carton's wear resistance, folding resistance, tensile resistance and moisture resistance.

[0094] Carton gluing technology: Use fully automatic carton gluing machines for gluing, folding, stacking and packing to improve work efficiency and product quality.

[0095] Performance requirements:

[0096] Empty box compression resistance: ≥4000N

[0097] Edge compression strength: ≥8000N / m

[0098] Bursting strength: ≥1000KPa

[0099] Cardboard moisture: 5%-10%

[0100] Waterproof performance: Where moisture-proof varnish is applied, there is no mesh penetration 120 seconds after dripping water.

[0101] (4) Carton preparation

[0102] According to the design requirements, select the appropriate corrugated paper and adhesive.

[0103] Use high-precision cutting equipment to cut corrugated cardboard to ensure accurate dimensions.

[0104] The carton surface is coated with film using laminating technology to improve moisture-proof performance.

[0105] Use a fully automatic carton gluer to glue the carton to ensure the stability of the carton structure.

[0106] (5) Performance testing

[0107] The prepared cartons are subjected to performance tests such as empty box compression resistance, edge compression strength, and bursting strength.

[0108] The moisture resistance of the cartons is tested to ensure that there is no mesh penetration 120 seconds after dripping water.

[0109] (6) Customized packaging

[0110] According to the characteristics of agricultural products such as potatoes, we design carton combinations of different materials and thicknesses.

[0111] Perform performance tests on customized cartons to ensure they meet the packaging requirements of specific products.

[0112] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A high-strength moisture-proof corrugated paper box for potatoes, characterized in that It includes: The carton structure is designed with a specific perimeter and aspect ratio, where the aspect ratio is between 1.2-1.5 to increase the compressive strength of the carton; Corrugated paperboard uses five-layer BE flute type, and the flute height and flute width parameters are optimized to achieve significant improvement in edge compression strength and bursting strength while maintaining good cushioning performance; The moisture-proof layer is coated on the surface of the corrugated cardboard with moisture-proof varnish to ensure that there is no mesh penetration 120 seconds after dripping water, thus improving the moisture-proof performance of the carton; as well as Adhesives should comply with the relevant laws, regulations and standards for food packaging to ensure that each layer of cardboard in the carton is firmly bonded without any debonding.

2. The high-strength moisture-proof corrugated paper box for potatoes according to claim 1, characterized in that: The surface of the carton should be clean, free of stains, scratches and damage, the printing should be clear, bright and complete, and the cutting should be neat, and the indentation lines should not be cracked or broken.

3. The high-strength moisture-proof corrugated paper box for potatoes according to claim 1, characterized in that: The empty box compressive strength of the carton is not less than 4000N, the edge compression strength is not less than 8000N / m, the bursting strength is not less than 1000KPa, and the moisture content of the paperboard is between 5% and 10%.

4. The high-strength moisture-proof corrugated paper box for potatoes according to any one of claims 1 to 4, characterized in that: The cartons meet the following quality requirements: Product appearance: The surface is clean without stains, scratches or damages, the cutting is neat, there is no serious burrs or residual edges, and the indentation line must not be cracked or broken; the printing is clear, bright and complete, the overprint is accurate, the color is consistent with the specified Pantone color number, and there is no mixed color or serious fading; Carton cutting and creasing line: The cutting gap width is 7mm (±2mm error is allowed), the creasing line is a flat die, the width shall not be greater than 17mm, and the fold line shall be centered; Forming requirements: After folding, it should be square, and the cut parts and edges of each surface must be at right angles to each other. A small number of special-shaped boxes are allowed (≤1%); the gap between the flaps should not be greater than 12mm, and a small number of non-conforming items are allowed (<5%); the flaps should be opened and closed 180° for 5 times, and cracking is not allowed. A small number of non-conforming items are allowed (≤1%); Holes and sealing at the overlapped corners: After the box is completed, the diameter of the holes at the overlapped corners shall not exceed 5mm; the width of the sealing tape reserved for the long flaps on the two bottom surfaces is 50mm (25mm for single flaps), and the length and width of the sealing tape reserved on the two sides are 50mm (error +10mm), and the edge lines are aligned; Product size and performance: The inner diameter is consistent with the size marked on the drawing during plate making, with an allowable error of ±5mm; the outer diameter is 10, 10, and 15mm longer, 10, and 15mm higher than the inner diameter, with an allowable error of ±5mm; the empty box compression is ≥4000N; the edge compression strength is ≥8000N / M; the bursting strength is ≥1000KPa; the moisture content of the cardboard is 5%-10%; the waterproof performance is that there is no mesh penetration after 120 seconds of dripping water at the place coated with moisture-proof varnish; Adhesive performance: the adhesive width is not less than 30mm, the adhesive is evenly applied without excess overflow, does not cause sticking inside or between cartons, has no glue marks or mixed color reactions, is firmly bonded without debonding, at least 90% of the bonded surface is destroyed when peeling, a small amount of debonding is acceptable (≤1%), the width of the gap at the bonding point is consistent, the width is 7mm (±3mm error is allowed), the center line of the indentation line is not exposed, the bonding firmness of each layer of paperboard is good, at least 95% of the bonded surface is destroyed when peeling; and Raw material properties: The paper quality meets the detailed requirements for weight and material of face paper, lining paper, interlayer paper, B flute and E flute. The quality of glue, ink and varnish all meet the relevant laws, regulations and standards for food packaging.

5. A method for preparing a high-strength moisture-proof corrugated paper box for potatoes, characterized in that: The following steps are involved: Raw material selection: including selecting face paper, lining paper, interlayer paper, B-flute paper and / or E-flute paper that meet specific grammage and material requirements, where the face paper, lining paper and interlayer paper have good strength, toughness and moisture resistance, and the flute parameters of B-flute paper and E-flute paper are determined based on experimental optimization; using adhesives that comply with the relevant laws, regulations and standards for food packaging; selecting inks and varnishes that comply with the relevant laws, regulations and standards for food packaging; Production of corrugated cardboard: A five-layer cardboard BE flute was selected for experimental testing. The effects of different flute widths, flute heights, and flute peak radii on edge compression strength and shrinkage were studied by designing orthogonal experiments and single-factor designs. The best flute parameters for the mechanical properties of the five-layer cardboard BE flute were obtained. The flute parameters were B flute width 5.6mm, flute height 2.8mm, E flute 3.3mm, and flute height 1.6mm. The selected face paper, lining paper, and interlayer paper were combined with the designed B flute and E flute paper, and the corrugated cardboard was formed through preheating, gluing, bonding, and drying processes. Carton forming and processing: Printing is performed on the surface of corrugated cardboard to ensure that the layout information is clear, accurate, complete and the color meets the requirements. After printing, the cardboard is placed on a laminating machine and coated with a matte film to enhance the wear resistance, folding resistance, tensile strength and moisture resistance of the packaging box. Cut and creasing the corrugated cardboard according to the requirements that the cutting gap width is 7mm (±2mm error is allowed), the creasing line is a flat die with a width not greater than 17mm and the fold line is centered; The corrugated cardboard is glued together end to end by roller coating, the width of the overlapping tongue edge is not less than 30mm, the adhesive is evenly applied without excess overflow, the bonding is firm without debonding, at least 90% of the bonding surface is destroyed when peeling, the gap width at the bonding point is 7mm (±3mm error is allowed) and the center line of the indentation line is not exposed, the bonding firmness of each layer of cardboard is good, and at least 95% of the bonding surface is destroyed when peeling.

6. The method for preparing a high-strength moisture-proof corrugated paper box for potatoes according to claim 5, characterized in that: The ink is used for printing product information and logos clearly and accurately, and the varnish is used for improving the moisture-proof and wear-resistant properties of the surface of the carton.

7. The method for preparing a high-strength moisture-proof corrugated paper box for potatoes according to claim 5, characterized in that: During the corrugated cardboard production process, the edge compression strength, bursting strength and bonding strength of the five-layer cardboard BE fluted cardboard samples produced with different flute parameter combinations are measured using standardized testing methods. The edge compression strength test uses an edge compression strength testing machine, the bursting strength test uses a bursting strength testing machine, and the bonding strength test is performed using specific equipment.

8. The method for preparing a high-strength moisture-proof corrugated paper box for potatoes according to claim 5, characterized in that: The printing operation in the carton forming and processing process requires adjusting the printing machine parameters to ensure printing quality, the laminating operation ensures that the film and the cardboard fit tightly without defects, the cutting operation ensures that the cutting surface is neat and smooth, the creasing operation makes the fold lines clear and the cardboard is not cracked or broken, and the gluing operation achieves efficient and high-quality gluing through a fully automatic carton gluing machine.

9. The method for preparing the high-strength moisture-proof corrugated paper box for potatoes according to claim 5, further comprising: Corrugated cardboard preparation: using a five-layer cardboard BE flute production line, production is carried out according to the preset flute height and flute width parameters to optimize the mechanical properties of the corrugated cardboard; Moisture-proof treatment: Apply moisture-proof varnish on the surface of corrugated cardboard to form a moisture-proof layer; Printing and cutting: Printing according to design requirements and cutting according to preset sizes and shapes; Forming and gluing: Folding and gluing the cut corrugated cardboard to form a carton structure with a specific perimeter and aspect ratio; Quality inspection: Carry out quality inspection on the manufactured cartons to ensure that they meet the preset performance requirements.

10. The preparation method according to claim 9, characterized in that: The flute height and flute width parameters of the corrugated paperboard are optimized through orthogonal experimental design to achieve a significant improvement in edge compression strength and bursting strength.