Corrugated board pallet, corrugated board pallet management system and corrugated board pallet management method

Abstract

To provide a reinforced corrugated board pallet that is highly recyclable, has a water-resistant function on the surface (liner) and core (flute), and reduces environmental load caused by waste, and suitable for the country or region to which an article is shipped based on regulation information.SOLUTION: A corrugated board pallet is produced by coating or impregnating all or part of a corrugated board paper substrate with a coating agent which is a liquid containing cellulose ester. An arithmetic processing device in a pallet management system: receives a demand data, shipping destination information, transportation environment information and insect control countermeasure necessity information from a user; receives a pallet requirement specification data for a placement substance from a product manufacturer; compares a regulated substance data, a raw material data, shipping destination information, transportation environment information, and insect control countermeasure necessity information; transmits raw material information appropriate for a shipping destination area, and the demand data to the pallet manufacturer; receives a quantity data of a pallet supplied to the product manufacturer from a logistic company; and receives the quantity data of pallet supplied to the user from the product manufacturer.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a cardboard pallet for loading packaged products, a cardboard pallet management system, and a cardboard pallet management method. [Background technology]

[0002] In recent years, with the rise of environmental awareness worldwide, there has been a demand for cardboard pallets used in logistics to be designed to be recyclable.

[0003] Cardboard pallets often use reinforced cardboard due to its load-bearing capacity. Here, reinforced cardboard refers to a structure in which flat paper (liner) and corrugated paper (medium) are glued together, and is typically made with a higher percentage of virgin pulp and multi-layered construction, making it much harder and less prone to deformation than regular cardboard. While most cardboard is generally made from recycled paper, reinforced cardboard often contains approximately 95% virgin pulp, and is also preferably made with a waterproof long fiber liner.

[0004] Conventionally, demand forecasts for cardboard pallets are often based on existing demand and supply data. However, as described in Non-Patent Document 1, there are also forecasts of demand for international (maritime and air) container volumes that reflect the effectivity of FTAs ​​(Free Trade Agreements) and EPAs (Economic Partnership Agreements), which will have a major impact on future trade patterns.

[0005] Furthermore, Patent Document 1 discloses a paper treatment agent that can impart water resistance and water repellency to paper, improve its strength when wet, and enable the treated paper to be easily repulped (recycled), and that contains, as an essential component, a copolymer having, as essential constituent units, an aromatic vinyl monomer unit, a (meth)acrylic acid ester monomer unit, and an unsaturated carboxylic acid anhydride monomer unit. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-154494 [Non-patent literature]

[0007] [Non-Patent Document 1] Fumiaki Isono and four others: Study on Regional Block-Based International Logistics Forecasting Methods, Proceedings of the Institute of Civil Engineering Planning, No. 32, 2005 Summary of the Invention [Problem to be solved by the invention]

[0008] Typically, the surface (liner) of reinforced cardboard is made water-resistant using cellulose long fiber or plastic materials. The core (flutes) is often not treated to be water-resistant. However, even reinforced cardboard loses strength if water seeps in through the core. Furthermore, it will collapse if pressure is applied while it is wet.

[0009] For example, if cargo is transported in a container, gaps in the container can allow water vapor to enter the container. Even if the container has no gaps, condensation can occur inside the container if the ambient temperature drops. Even in airborne containers, the cold air in the cargo compartment can cause moisture in the air inside the container to condense and freeze, potentially thawing during land transport and flooding the container. For this reason, the core of reinforced cardboard, like the surface, is sometimes treated with a waterproofing or water-resistant plastic material. However, if environmental regulations in various countries and regions restrict the use of reinforced cardboard pallets made with plastic materials in the future, reinforced cardboard pallets will need to be manufactured using raw materials that comply with the regulated substances in each country and region.

[0010] Reinforced cardboard is a highly recyclable material. However, if plastic forms on the surface of the cardboard or is mixed into the cardboard, it becomes difficult to separate the plastic during recycling. In such cases, most cardboard is incinerated. Under these circumstances, the recyclability of reinforced cardboard cannot be fully utilized. Furthermore, if the use of reinforced cardboard pallets made with plastic materials is restricted in the future due to environmental regulations in each country and region, reinforced cardboard pallets will need to be manufactured from raw materials that comply with the environmentally regulated substances in each country and region.

[0011] Non-Patent Document 1 does not take into consideration environmentally regulated substances that will come into effect in the future.

[0012] Furthermore, paper treatment agents containing the copolymer described in Patent Document 1 are considered recyclable. However, some of them become plastic residue and are thought to be processed as plastic fuel (RPF). In this regard, there is thought to be room for improvement from the perspective of reducing carbon dioxide (CO2).

[0013] The purpose of this disclosure is to provide reinforced cardboard pallets that are highly recyclable and have water-resistant properties on the surface (liner) and core (flute), as well as to provide reinforced cardboard pallets that are suitable for the country or region to which the reinforced cardboard pallet is shipped based on the specifications of the cargo, transportation environment information, and regulatory information of the shipping destination, thereby reducing the environmental burden caused by reinforced cardboard waste and curbing overproduction of reinforced cardboard pallets. [Means for solving the problem]

[0014] The cardboard pallet of the present disclosure is produced by coating or impregnating all or part of the cardboard paper base material with a coating agent, and the coating agent is a liquid containing cellulose ester.

[0015] The cardboard pallet management system disclosed herein has one or more storage media and one or more arithmetic processing devices, and the arithmetic processing device receives cardboard pallet demand data, shipping destination information, transportation environment information, and information on whether insect control measures are necessary from users, receives cardboard pallet requirement specification data for the cargo from product manufacturers, compares regulated substance data, raw material data, shipping destination information, transportation environment information, and information on whether insect control measures are necessary, sends cardboard raw material information suitable for the shipping destination area and cardboard pallet demand data to the cardboard pallet manufacturer, receives quantity data of cardboard pallets supplied to the product manufacturer by the logistics company, and receives quantity data of cardboard pallets supplied to the user by the product manufacturer. [Effects of the Invention]

[0016] According to the present disclosure, it is possible to provide a reinforced cardboard pallet that is highly recyclable and has water-resistant properties on the surface (liner) and core (flute), and to provide a reinforced cardboard pallet that is suitable for the country or region to which the reinforced cardboard pallet is to be shipped based on the specifications of the cargo, transportation environment information, and regulatory information of the shipping destination, thereby reducing the environmental burden caused by reinforced cardboard waste and curbing overproduction of reinforced cardboard pallets. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is an overall configuration diagram showing a cardboard pallet management system according to a first embodiment. [Figure 2] FIG. 2 is a diagram showing the flow of data in the cardboard pallet management system of FIG. 1. [Figure 3] 1 is a flow diagram showing a cardboard pallet management method according to the first embodiment. [Figure 4] 1 is a configuration diagram showing a system for predicting demand for cardboard pallets in accordance with environmental regulations at the destination of the cardboard pallets. [Figure 5] 1 is a graph showing the water absorbency versus the coating amount of cellulose acetate. [Figure 6] 1 is a graph showing the results of a tensile strength test of a reinforced cardboard board in a dry state and in a wet state. DETAILED DESCRIPTION OF THE INVENTION

[0018] The present disclosure relates to a management system that grasps the demand and supply of reinforced cardboard pallets made from raw materials that take into consideration the cardboard pallet requirements of the cargo, environmentally regulated substances in the shipping destination area, and the cargo transportation environment, and optimizes usage, as well as reinforced cardboard pallets that are made water-resistant with cellulose ester-based materials and are easy to recycle.

[0019] For example, in addition to load-bearing capacity, the functions required for reinforced cardboard pallets used to carry precision equipment and other products include water resistance and waterproofing. Specifically, water resistance is needed to prevent the strength of the reinforced cardboard pallet from decreasing, and to prevent the reinforced cardboard pallet from collapsing under the weight of the load even if it gets wet.

[0020] Typically, the surface of reinforced cardboard is made with plant-derived cellulose long fiber (virgin material) or plastic materials such as polyethylene and polypropylene to provide water resistance and waterproofing. Plastic materials are formed on the surface of the cardboard, between the sheets, or mixed into the paper, making them difficult to recycle. For this reason, much of it is incinerated, causing environmental impact. Furthermore, the core (flutes) are often not made water-resistant or waterproof, and water penetration into the core can cause a loss of strength and collapse. Furthermore, cardboard may also contain fluorocarbons (PFAS), whose use requires careful attention as regulatory trends change.

[0021] Reinforced cardboard pallets used to carry precision equipment and other items must be load-bearing and water-resistant, while also having a low environmental impact. In other words, it is necessary to take advantage of the recyclability of reinforced cardboard (a recycling rate of 95% or more) while also ensuring load-bearing and water-resistant properties.

[0022] Examples of environmentally friendly and water-resistant materials include plant-derived cellulose esters (cellulose acetate, cellulose butyrate, cellulose acetate butyrate, etc.). Cellulose acetate is obtained by chemically modifying the hydroxyl groups of cellulose with acetic acid, and is water-resistant, solvent-resistant, and chemical-resistant, as well as UV-resistant.

[0023] A cellulose ester is dissolved in a ketone, an ester, or an alcohol highly compatible with the ester to prepare a cellulose ester solution, which is then coated on the surface of reinforced cardboard base paper, thereby dispersing cellulose fibers and providing water resistance to the reinforced cardboard.

[0024] On the other hand, used reinforced cardboard is collected and dissociated for recycling. As the dissociation solution, a 7% sodium hydroxide solution heated to 40 to 60°C is usually used. The cellulose ester coated on the reinforced cardboard, for example, cellulose acetate, is hydrolyzed by the dissociation solution to become acetic acid and cellulose.

[0025] Furthermore, during transportation, cardboard pallets may become infested with pests such as fire ants and redback spiders at overseas airports and ports. If these pests are mixed into cargo, there is a concern that they could cause significant disruptions to logistics. Furthermore, pests may drive out native ants and spiders at their destinations and prey on small animals, causing a decline in their populations, potentially disrupting the ecosystem. Furthermore, they may also cause damage to infrastructure such as electrical equipment and power lines at airports and ports. For this reason, insect repellents such as benzyl alcohol, DEET, and pyrethroids may be dissolved in the solution used to impart water resistance to reinforced cardboard to impart insect repellent properties.

[0026] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

[0027] (Embodiment 1) (Overall configuration of cardboard pallet management system) FIG. 1 is a diagram showing the overall configuration of a cardboard pallet management system according to the first embodiment.

[0028] The cardboard pallet management system 100 shown in this diagram is designed for a case in which a user 2, who is a customer of a system management company 1, has its products (e.g., precision equipment) manufactured by a separate product manufacturer 3. The cardboard pallet management system 100 includes the system management company 1, a processing device 6 managed by the system management company 1, the user 2, a storage medium 7 owned by the user 2, the product manufacturer 3 that manufactures the products of the system management company's customers, a storage medium 8 owned by the product manufacturer 3, a cardboard pallet manufacturer 4, a storage medium 9 owned by the cardboard pallet manufacturer 4, a logistics company 5, and a storage medium 10 owned by the logistics company 5, all connected via a network. The network may be, for example, the Internet, a LAN (Local Area Network), a WAN (Wide Area Network), or a combination of these. The communication circuits used in the network may be wired or wireless, and a combination of these may be used.

[0029] Although not shown, the user 2, product manufacturer 3, cardboard pallet manufacturer 4, and logistics company 5 also have processing devices connected to the network, and these processing devices are configured to be able to send and receive data to and from their respective in-house storage media 7, 8, 9, and 10. These storage media 7, 8, 9, and 10 may be built into the processing devices. Therefore, in this specification, the processing mainly performed by the user 2, product manufacturer 3, cardboard pallet manufacturer 4, and logistics company 5 may refer to the processing performed by the processing devices that each of them possesses.

[0030] User 2 transmits product demand data to product manufacturer 3, which stores the product demand data in storage medium 8 of product manufacturer 3, and product manufacturer 3 manufactures the product. User 2 also transmits cardboard pallet demand data, shipping destination information, transport environment information for the load (Table 1), and information on whether or not insect control measures have been taken to a processing device 6 managed by system management company 1, which stores these. Product manufacturer 3 also transmits cardboard pallet requirement specification data for the load (Table 2) to processing device 6, which stores these.

[0031] Table 1 shows the transportation environment for various transportation methods.

[0032] Table 2 also shows the loads, load characteristics, and required characteristics of cardboard pallets corresponding to various cardboard pallet grades.

[0033] [Table 1]

[0034] [Table 2]

[0035] The arithmetic processing device 6 compares the stored data on restricted substances for each region (Table 3) with the raw material data (Table 4) and shipping destination information, and transmits cardboard raw material information suitable for the shipping destination region and the transportation environment of the cargo, as well as cardboard pallet demand data, cardboard pallet requirements for the cargo, transportation environment information, and information on whether insect control measures are required to the cardboard pallet manufacturer 4. Based on the data from the arithmetic processing device 6, the cardboard pallet manufacturer 4 manufactures cardboard pallets suitable for the shipping destination and transportation environment of user 2, and sends the cardboard pallets to logistics company 5. The logistics company 5 sends the cardboard pallets to product manufacturer 3. The sent cardboard pallets are used to load products manufactured by product manufacturer 3, and the logistics company 5 sends the loaded products to user 2. In addition, the logistics company 5 and product manufacturer 3 send quantity data of the supplied cardboard pallets to the arithmetic processing device 6.

[0036] Table 3 summarizes the regulations and their restrictions or restricted substances in each region.

[0037] Table 4 also shows a summary of the raw materials used in cardboard pallets and their contents.

[0038] [Table 3]

[0039] [Table 4]

[0040] In this embodiment, an example is described in which the product manufacturer 3 loads the product, but the product manufacturer 3 may send the product to the distribution company 5, and the distribution company 5 may load the product.

[0041] As an example of this embodiment, an example will be given in which precision equipment is loaded onto cardboard pallets and transported to various regions of the European Union (EU).

[0042] In the EU, the Packaging and Packaging Waste Regulation and the Water Framework Directive have been enacted, as shown in Table 3. Therefore, in accordance with these regulations and directives, cardboard pallets that do not contain plastic-based materials are required.

[0043] The selection of cardboard pallets is based on the fragility and weight of the precision equipment being loaded, as shown in Table 2.

[0044] Materials for cardboard pallets that do not contain plastic materials are selected with consideration given to the pressure applied to the cardboard pallet, such as the length (3-5 mm) and type of cellulose, as shown in Table 4. Also, taking into account the effects of condensation and water vapor in the transportation environment shown in Table 1, the surface of the reinforced cardboard, or the surface and core of the reinforced cardboard, is treated to be water-resistant using a plant-derived cellulose ester as shown in Table 4. If necessary, insect repellent treatment is also carried out using DEET-based, pyrethroid-based, benzyl alcohol-based, carbamate-based materials, etc. as shown in Table 4.

[0045] The cardboard pallet management system 100 allows the system management company 1 to collect information on environmentally restricted substances in the region where the cardboard is being shipped, the cardboard pallet requirements for the cargo, the transport environment for the cargo, whether insect control measures are necessary, demand and supply data, and data on raw materials suitable for the region, and based on this data, it becomes possible to forecast demand for cardboard pallets.In addition, by understanding the demand and supply of cardboard pallets suitable for the region and optimizing usage, it is possible to reduce the environmental burden caused by waste derived from cardboard pallets.

[0046] The arithmetic processing devices of the system management company 1, user 2, product manufacturer 3, cardboard pallet manufacturer 4, and logistics company 5 preferably have, in addition to a conventional CPU (Central Processing Unit), a CPU with AI (Artificial Intelligence) functionality, and a display device such as a display for displaying information. These arithmetic processing devices also preferably have input devices such as a keyboard and a mouse for inputting characters. Furthermore, these arithmetic processing devices each have, for example, a communication module used for communication with an external device, and an internal memory such as RAM (Random Access Memory) for storing system data and internal data, and are connected to enable data transmission and reception to and from external memory such as storage media.

[0047] (Data flow in cardboard pallet management system) FIG. 2 is a diagram showing a detailed flow of data in the cardboard pallet management system 100 of this embodiment.

[0048] As shown in the figure, user 2 transmits product demand data stored in storage medium 7 to storage medium 8 of product manufacturer 3 via transmission module 11. Product manufacturer 3 uses the product demand data to manufacture products. User 2 transmits the cardboard pallet demand data, shipping destination information, transport environment information for the cargo, and information on whether or not pest control measures are in place from storage medium 7 via transmission module 11 to a processing device 6 managed by system management company 1. Product manufacturer 3 transmits cardboard pallet requirement specification data for the cargo stored in storage medium 8 to processing device 6 via transmission module 12.

[0049] The arithmetic processing device 6 compares the cardboard pallet demand data, shipping destination information, cargo transportation environment information, and insect control information sent from user 2, as well as the cardboard pallet requirement specification data for the cargo sent from product manufacturer 3, with the arithmetic processing device 6's stored data on restricted substances in the region, shipping destination information, and raw material data, and transmits the raw material data, insect control information, and cardboard pallet demand data suitable for the region to cardboard pallet manufacturer 4 via transmission module 13 to storage medium 9 of cardboard pallet manufacturer 4. Cardboard pallet manufacturer 4 manufactures cardboard pallets based on the raw material data, insect control information, and cardboard pallet demand data suitable for the region and the cargo transportation environment, stores the cardboard pallet supply data in storage medium 9, and transmits the cardboard pallet supply data to storage medium 10 of logistics company 5 via transmission module 14.

[0050] Logistics company 5 transmits the cardboard pallet supply quantity data to system management company 1 and product manufacturer 3 via transmission module 15. Product manufacturer 3 stores the transmitted cardboard pallet supply quantity data in storage medium 8, and transmits the cardboard pallet supply quantity data and product delivery data to storage medium 7 of user 2 via transmission module 12. User 2 confirms that the transmitted cardboard pallet supply quantity data matches the cardboard pallet demand data, and that the product delivery data matches the product demand data.

[0051] Furthermore, the cardboard pallet manufacturer 4 can manage the inventory of cardboard pallets based on demand and supply data for cardboard pallets suitable for the area, or can manufacture cardboard pallets without holding inventory, thereby minimizing the storage space for cardboard pallets.

[0052] In this embodiment, the case where the user 2, product manufacturer 3, cardboard pallet manufacturer 4, and logistics company 5 are each one company is described, but this system can also be applied when there are multiple companies for each.

[0053] As described above, the processing device 6 managed by the system management company 1 collects cardboard pallet requirement specification data for cargo, cardboard pallet demand data, shipping destination information, transportation environment information, information on whether or not pest control measures are in place, cardboard pallet supply data, regional regulated substance data, and raw material data. Based on this data and information, the processing device 6 can predict demand for cardboard pallets tailored to regional regulated substances.

[0054] FIG. 3 is a flow diagram showing a cardboard pallet management method according to this embodiment.

[0055] As shown in this diagram, the arithmetic processing device 6 of the system management company 1 receives cardboard pallet demand data, shipping destination information, transportation environment information, and information on whether or not pest control measures are taken from the user 2 and stores them (step S110). The arithmetic processing device 6 receives cardboard pallet requirement specification data for the cargo from the product manufacturer 3 and stores them (step S120). The arithmetic processing device 6 compares the restricted substance data, raw material data, shipping destination information, and information on whether or not pest control measures are taken, and transmits cardboard raw material information suitable for the shipping destination area and cardboard pallet demand data to the cardboard pallet manufacturer 4 (step S130). The arithmetic processing device 6 receives cardboard pallet quantity data supplied by the logistics company 5 to the product manufacturer 3 (step S140). The arithmetic processing device 6 receives cardboard pallet quantity data supplied by the product manufacturer 3 to the user 2 (step S150).

[0056] In this diagram, the cardboard pallets are managed primarily by the processing unit 6 of the system management company 1, but the actual calculations, data storage, communication, etc. may be performed using a server, personal computer, mobile terminal, etc. external to the system management company 1, or may be performed using so-called cloud computing. In this case, data that requires confidentiality is encrypted or otherwise processed as appropriate.

[0057] FIG. 4 is a configuration diagram showing a system for predicting demand for cardboard pallets in accordance with environmental regulations at the destination of the cardboard pallets.

[0058] The arithmetic processing device 6 shown in this figure has an AI unit that performs data science and is managed by the system management company 1 shown in Figure 1. In other words, the arithmetic processing device 6 is a CPU with AI functions. The AI ​​unit uses big data to perform statistical processing, machine learning, deep learning, analysis (nonlinear analysis and complex systems analysis), etc. The big data includes required specification data for the cardboard pallets of the cargo, cardboard pallet demand data, cardboard pallet supply data, shipping destination information, transportation environment information, regional restricted substance data, raw material data, and information on the need for insect control measures. Based on the processing results of the AI ​​unit, raw material data appropriate for the region can be derived, and it becomes possible to forecast the demand for cardboard packaging materials, for example, on a monthly basis. Such demand forecasts are represented as the graph in the figure.

[0059] (Embodiment 2) In embodiment 2, we will explain a case where the shipping destination of User 2's products in the cardboard pallet management system 100 of embodiment 1 restricts the use of plastic materials in waterproof cardboard pallets, and cellulose acetate, a plant-derived cellulose ester, is used as an alternative raw material.

[0060] (Sample production) (Sample 1) (Paper base material) The core material used in conventional reinforced cardboard AA is SCP160 (basis weight 160g / m 2 K5 liner (basis weight 163.8 g / m), which is a paper base material similar to that of K5 liner (without chemical treatment) 2 , without chemical treatment) and a thickness of 19.5 μm was used.

[0061] (coating agent) The coating agent is a coating liquid mainly containing cellulose ester. As the coating liquid, in consideration of versatility and environmental impact, a solution of cellulose ester dissolved in acetone solvent or ethyl acetate solvent, or a solution of cellulose ester dissolved in ethyl acetate solvent to which alcohol such as ethanol is added, can be used. In this embodiment, a coating agent in which cellulose acetate is dissolved in acetone is used.

[0062] (Coating method) The above coating agent was applied to the surface of the K5 liner using a blade coating method and dried at room temperature. The coating amount was 6.8 g / m2 in terms of cellulose acetate solids. 2 In this specification, the coating amount of solids may be referred to as the "content."

[0063] (Sample 2) In this sample, the coating amount is 12.7 g / m2 in terms of cellulose acetate solids. 2 The other conditions were the same as those for Sample 1.

[0064] (Sample 3) In this sample, the coating amount is 22.6 g / m2 in terms of cellulose acetate solids. 2 The other conditions were the same as those for Sample 1.

[0065] (Sample 4) In this sample, the coating amount is 45.2 g / m2 in terms of cellulose acetate solids. 2 The other conditions were the same as those for Sample 1.

[0066] (Sample 5) In this sample, the coating amount is 56.4 g / m2 in terms of cellulose acetate solids. 2 The other conditions were the same as those for Sample 1.

[0067] (Comparative Example 1) The sample used was an uncoated K5 paper base, meaning that the cardboard liner was not coated with cellulose acetate.

[0068] (Coating film evaluation method) (a) Water resistance Cobb method: Water absorption after 2 minutes (g / m 2 ) was measured.

[0069] (b) Room temperature blocking (assuming loading) 2kg / cm for stacked coated surfaces and stacked coated and uncoated surfaces 2 The pressure was maintained at 100 psi for one day, and the adhesion was observed.

[0070] (c) High-temperature blocking (assuming box-making) For laminated sheets with coated surfaces facing each other, laminated sheets with coated and uncoated surfaces facing each other, and laminated sheets with coated and SUS steel sheets facing each other, the test was carried out at 200°C under a pressure of 2 kg / cm 2 The pressure was maintained for 10 minutes and the adhesion was observed.

[0071] (d) dissociative 6 g of coated paper cut into 1 cm squares was added to 100 ml of 7% NaOH solution heated to 40°C and mixed for 15 minutes using a household mixer. The resulting slurry was then made into paper and the dissociation property was evaluated by visually checking for the presence or absence of undissociated material (paper pieces).

[0072] (Coating film evaluation results) Table 5 summarizes the composition and test results of the above samples.

[0073] [Table 5]

[0074] As is clear from this table, Samples 1 to 5 have lower water absorbency and water resistance than the uncoated cellulose acetate Comparative Example 1. Furthermore, Samples 1 to 5 and Comparative Example 1 did not produce any undissociated material in the dissociation test, and there was no blocking at room temperature or 200°C.

[0075] 5 is a graph showing the water absorbency versus the coating amount of cellulose acetate, with the vertical axis representing the water absorbency and the horizontal axis representing the coating amount.

[0076] From this figure, samples 1 to 5 have a coating weight of 22.6 g / m 2 In the above range, the water absorbency is almost constant (8 to 7 g / m 2 ) The coating weight of Sample 1 is 6.8 g / m 2 In this case, the water absorption is 18g / m 2 and the water absorbency of Comparative Example 1 is 38 g / m 2 is considerably lower than

[0077] Therefore, the coating amount is 6.8 to 56.4 g / m 2 is desirable, and 22.6 to 56.4 g / m 2 is more desirable, and from an economical standpoint, 23 to 50 g / m 2 is desirable, 23 to 30 g / m 2 is particularly desirable.

[0078] Furthermore, if the coating is applied too thickly, the cardboard box will become heavier, the weight per package will increase, labor will be required for transportation, and transportation costs will increase. It will also be a waste of coating agent.

[0079] (Tensile strength test) Tensile tests were conducted using AA-grade reinforced cardboard, a common type of reinforced cardboard. Test conditions conformed to JIS P8113: cardboard size 200 x 15 mm, grip spacing 180 mm, and a tensile speed of 10 mm / min. Cardboard is manufactured by laminating three sheets of cardboard—front and back liners and a core—using a corrugator. The machine direction (MD) is the direction in which the core cross section is visible, and the cross direction (CD) is the direction of manufacture. Water penetration from the MD direction is known to reduce the strength of reinforced cardboard. Therefore, tensile tests were conducted on samples impregnated with cellulose acetate from the MD and uncoated samples, measuring the tensile strength in both dry and wet states. For wet samples, 50 pumps (3 g) of water were sprayed onto the front and back of the cardboard using a spray bottle, and the tensile strength was evaluated after 5 minutes. Similar evaluations were also conducted in the CD direction, where water penetration is less likely.

[0080] (Tensile test results) Figure 6 is a graph showing the results of tensile strength tests on reinforced cardboard in dry and wet states. The upper graph is for the MD direction, and the lower graph is for the CD direction. The graphs show the results of tests conducted in dry and wet states on samples of reinforced cardboard coated with cellulose acetate and uncoated samples, respectively. Three samples were used for each condition.

[0081] As shown in this figure, in the MD direction, the strength of the sample without cellulose acetate coating decreases by approximately 46% when wet compared to the dry state. On the other hand, the strength of the sample coated with cellulose acetate decreases by only approximately 9% compared to the dry state. Furthermore, the strength of the sample coated with cellulose acetate increases by approximately 69% in the wet state compared to the uncoated sample.

[0082] On the other hand, in the CD direction, the strength of the sample without cellulose acetate coating is only about 8% lower in the wet state compared to the dry state. Similarly, the strength of the sample coated with cellulose acetate is only about 7% lower compared to the dry state. This shows that reinforced cardboard is less likely to lose strength if water does not penetrate. Furthermore, the strength of the sample coated with cellulose acetate is about 36% higher in the wet state compared to the uncoated sample.

[0083] From the above, it has become clear that the cardboard board having the cellulose acetate coating film according to the present disclosure has water resistance, high tensile strength, improved strength when wet, and no problems with release properties, room temperature blocking properties, or heat resistance blocking properties.

[0084] Furthermore, the cellulose acetate coating film is hydrolyzed in a sodium hydroxide solution to dissociate into acetic acid and cellulose. This allows cellulose acetate, a cellulose ester, to be used as an alternative raw material when restrictions are imposed on the use of plastic materials as raw materials for waterproof cardboard packaging materials in the country or region to which User 2's products are shipped in the cardboard pallet management system 100 of embodiment 1. This allows the resource circulation rate for cardboard to be improved.

[0085] Table 6 shows a comparison of the plastic content between current reinforced cardboard and the reinforced cardboard of the present disclosure when water resistance is imparted.

[0086] [Table 6]

[0087] From this table, it can be seen that the reinforced cardboard according to the present disclosure can be made water-resistant without using plastic materials or long cellulose fibers (virgin material). The length of the cellulose is 1 mm or more and less than 2 mm, and 2 mm or more and less than 3 mm.

[0088] Furthermore, the reinforced cardboard according to the present disclosure uses cellulose ester to impart water resistance to the reinforced cardboard, so even if the reinforced cardboard is dumped into a river after use, it will not become microplastics, thereby reducing the environmental burden.

[0089] The reinforced cardboard boards that have been treated with coating or impregnation of cellulose ester as described above have a microscopic structure that is clearly different from that of reinforced cardboard boards made by applying or kneading a plastic water-resistant / waterproof material. That is, the cardboard pallet of the present disclosure can be determined to have been treated with coating or impregnation of cellulose ester by observing the surface or cross section with an electron microscope or the like.

[0090] The above describes embodiments of the present disclosure, but the technical scope of the present disclosure is not limited to the above embodiments, and various modifications or improvements to the above embodiments are also included in the technical scope of the present disclosure. [Explanation of symbols]

[0091] 1: system management company, 2: user, 3: product manufacturer, 4: cardboard pallet manufacturer, 5: logistics company, 6: processing unit, 7, 8, 9, 10: storage medium, 11, 12, 13, 14, 15: transmission module, 100: cardboard pallet management system.

Claims

1. A cardboard pallet made by coating or impregnating all or part of a cardboard paper base material with a coating agent, The cardboard pallet, wherein the coating agent is a liquid containing a cellulose ester.

2. The cardboard includes a liner and flutes; The cardboard pallet according to claim 1 , wherein at least the flutes contain the coating agent.

3. 2. The cardboard pallet according to claim 1, wherein the cellulose ester includes at least one of cellulose acetate, cellulose butyrate, and cellulose acetate butyrate.

4. 2. The cardboard pallet according to claim 1, wherein the coating agent contains at least one of a ketone, an ester, and an alcohol as a solvent.

5. The content of the cellulose ester in the flute is 23 to 30 g / m ２ 3. The cardboard pallet according to claim 2, wherein:

6. The water absorption of the flute is 8 g / m ２ 3. The cardboard pallet according to claim 2, wherein:

7. 2. The cardboard pallet according to claim 1, wherein the cardboard is reinforced cardboard.

8. A system for managing cardboard pallets made by coating or impregnating a cardboard paper base material with a coating agent, the coating agent is a liquid containing a cellulose ester, one or more storage media and one or more processors; The arithmetic processing device Receives the cardboard pallet demand data, shipping destination information, transportation environment information, and information on whether insect control measures are necessary from the user; Receive the cardboard pallet requirements specification data for the load from the product manufacturer, The restricted substance data, raw material data, the shipping destination information, the transportation environment information, and the information on whether or not insect control measures are necessary are collated, and cardboard raw material information suitable for the shipping destination area and the demand quantity data for the cardboard pallets are transmitted to the cardboard pallet manufacturer. receiving quantity data of the cardboard pallets supplied by the logistics company to the product manufacturer; A cardboard pallet management system that receives data on the quantity of the cardboard pallets supplied by the product manufacturer to the user.

9. one or more storage media and one or more processors; The arithmetic processing device Demand data for cardboard pallets, shipping destination information, transportation environment information, and information on whether insect control measures are necessary are received from users, Receive the cardboard pallet requirements specification data for the load from the product manufacturer, The restricted substance data, raw material data, the shipping destination information, the transportation environment information, and the information on whether or not insect control measures are necessary are collated, and cardboard raw material information suitable for the shipping destination area and the demand quantity data for the cardboard pallets are transmitted to the cardboard pallet manufacturer. receiving quantity data of the cardboard pallets supplied by the logistics company to the product manufacturer; A cardboard pallet management system that receives data on the quantity of the cardboard pallets supplied by the product manufacturer to the user.

10. The processing unit Demand data for cardboard pallets, shipping destination information, transportation environment information, and information on whether insect control measures are necessary are received from users. Receive the cardboard pallet requirements specification data for the load from the product manufacturer, The restricted substance data, raw material data, the shipping destination information, the transportation environment information, and the information on whether or not insect control measures are necessary are collated, and cardboard raw material information suitable for the shipping destination area and the demand quantity data for the cardboard pallets are transmitted to the cardboard pallet manufacturer. receiving quantity data of the cardboard pallets supplied by the logistics company to the product manufacturer; A cardboard pallet management method, comprising receiving data on the quantity of the cardboard pallets supplied by the product manufacturer to the user.

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