WO2026034162A1 - Procédé de fabrication d'une planche en bois - Google Patents

Procédé de fabrication d'une planche en bois

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Publication number
WO2026034162A1
WO2026034162A1 PCT/JP2025/025735 JP2025025735W WO2026034162A1 WO 2026034162 A1 WO2026034162 A1 WO 2026034162A1 JP 2025025735 W JP2025025735 W JP 2025025735W WO 2026034162 A1 WO2026034162 A1 WO 2026034162A1
Authority
WO
WIPO (PCT)
Prior art keywords
manufacturing
wood board
wood
sieving
intermediate material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2025/025735
Other languages
English (en)
Japanese (ja)
Inventor
雅也 永井
鉄平 朝田
喬文 井上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Intellectual Property Management Co Ltd
Original Assignee
Panasonic Intellectual Property Management Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Publication of WO2026034162A1 publication Critical patent/WO2026034162A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/02—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/04—Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres

Definitions

  • This disclosure generally relates to methods for manufacturing wood boards.
  • Patent Document 1 discloses a method for manufacturing fiberboard.
  • wood material is steamed and defibrated to obtain wood fibers, to which an adhesive is added, and the resulting material is then formed and thermo-compressed.
  • the wood material includes a compressed material obtained by compressing and integrating the dried pulverized material of multiple palm family plants.
  • Patent Document 1 it is believed that the fiber board is manufactured based on the empirical rule that the longer the wood fibers, the better.
  • the object of this disclosure is to provide a method for manufacturing wood boards that can produce high-quality wood boards.
  • a method for manufacturing a wood board according to one embodiment of the present disclosure is a method for manufacturing a wood board using plant biomass raw materials or intermediate materials thereof. It includes a sieving step in which sieving is performed based on the correspondence between specific sizes and the physical properties of a wood board manufactured using wood elements having those specific sizes.
  • FIG. 1 is a flowchart showing an example of a method for manufacturing a wood board (MDF) according to this embodiment.
  • FIG. 2 is a flowchart showing another example of the method for manufacturing the above-mentioned wooden board (MDF).
  • FIG. 3 is a flowchart showing another example of the method for manufacturing the above-mentioned wooden board (MDF).
  • FIG. 4 is a flowchart showing an example of a method for manufacturing a wood board (particle board) according to this embodiment.
  • FIG. 5 is a flowchart showing the manufacturing process of wood boards (fiber boards and particle boards).
  • the method for manufacturing a wood board according to this embodiment is a method for manufacturing a wood board using plant biomass raw materials or intermediate materials thereof.
  • the method for manufacturing a wood board includes a sieving step.
  • the sieving step is a step of sieving based on the correspondence between specific sizes and the physical properties of a wood board manufactured using wood elements of specific sizes (see Tables 1 and 2 below).
  • specific size means a specific fiber length, and more specifically, a certain range of sizes resulting from classification (for example, each classification fraction in Tables 1 and 2 below).
  • wood element means defibrated fiber.
  • specific size means chip size, and more specifically, a certain range of sizes resulting from classification (each classification fraction).
  • wood element means chip.
  • physical properties are not particularly limited, but examples include mechanical properties. Mechanical properties are not particularly limited, but examples include bending strength (MOR: Modulus of Rupture) and bending Young's modulus (MOE: Modulus of Elasticity).
  • Correspondence can be considered the same as correlation.
  • the specific size may be the size of the wood elements obtained by processing (defibrating, crushing, etc.) the plant biomass raw material or its intermediate material, or the size of the plant biomass raw material or its intermediate material itself.
  • the sieving process is performed to increase the proportion of wood elements that contribute to high quality of the wood board.
  • Wood Board Types
  • the wood board according to this embodiment is, for example, a fiberboard, a particleboard, etc. Fiberboards are classified into medium-density fiberboards, hardboards, and insulation boards depending on the density, application, and manufacturing method.
  • the wood board is medium density fiberboard (MDF), hardboard (HB), insulation board (IB), or particle board (PB).
  • MDF medium density fiberboard
  • HB hardboard
  • IB insulation board
  • PB particle board
  • plant biomass raw materials or intermediate materials thereof are used as the material for the wood board.
  • the plant biomass raw materials include at least one species selected from the group consisting of conifers, broad-leaved trees, and herbaceous plants.
  • Herbaceous plants include palm, bamboo, rice straw, bagasse, etc.
  • Specific examples of materials for the wood board include oil palm trunks (OPT), empty fruit bunches (EFB), and oil palm fronds (OPF).
  • Plant biomass raw materials may also be raw wood logs, demolition materials, agricultural waste, etc.
  • the wood board manufacturing method will be explained separately as a fiberboard manufacturing method and a particleboard manufacturing method (see FIG. 5). Furthermore, since the wood board manufacturing method includes a sieving process (see FIGS. 1 to 5), the sieving process will also be explained in a separate section. In FIG. 5, the fiberboard manufacturing method includes three sieving processes from start to finish, but it is sufficient to include at least one sieving process. The same applies to particleboard manufacturing methods.
  • the manufacturing method of fiberboard will be further divided into the manufacturing methods of MDF, HB and IB.
  • MDF manufacturing method Generally, MDF is manufactured through the process of fiberizing the raw material (steaming and defibrating), drying, adding adhesives and water repellents, dry forming, heat pressing, humidity control, and finishing.
  • HB manufacturing method Generally, HB is produced through the process of fiberizing the raw material (steaming and defibrating), adding water, adding a sizing agent, wet forming, heat pressing, humidity adjustment, and finishing.
  • pretreatment is performed using pretreatment means before the raw material is fiberized (steamed and defibrated) (see Figures 1 to 3 and 5).
  • Pretreatment includes inputting production conditions, adding raw materials, and an intermediate material production process.
  • the fiberboard manufacturing method has an intermediate material production process and a defibrating process.
  • the fiberization of raw materials (steamed and defibrated) corresponds to the "defibrating (process)" in Figure 5
  • dry forming corresponds to the "dry board process” in Figure 5
  • wet forming corresponds to the "wet board process” in Figure 5.
  • the pretreatment means used in the fiberboard manufacturing method are not particularly limited, but examples include tablet presses, pelletizers, briquetters, and balers (roll and square).
  • Pretreatment using the above pretreatment means results in a pretreated product.
  • Pretreated products include, but are not limited to, tablets, pellets, briquettes, square bales, and roll bales. These are intermediate materials used in the production of fiberboard (see Figure 5).
  • PB manufacturing method Generally, PB is manufactured through the process of breaking down raw materials into small pieces (cutting and crushing), drying, adding adhesives and water repellents, dry forming, heat pressing, humidity control, and finishing.
  • pre-processing is performed using pre-processing means before the raw materials are broken down into small pieces (cutting and crushing) (see Figure 5).
  • Pre-processing includes inputting production conditions, adding raw materials, and creating intermediate materials.
  • the PB manufacturing method includes an intermediate material creation process and a crushing process. The breaking down of raw materials into small pieces (cutting and crushing) corresponds to the "crushing (process)" in Figure 5, and dry forming corresponds to the "dry board process” in Figure 5.
  • pretreatment means in the PB manufacturing method are not particularly limited, but examples include rotary races, crushers, classifiers, hammer mills, ball mills, ring flakers, horizontal vibrating screens, vertical vibrating screens, and balers (roll, square).
  • Pretreatment using the above pretreatment means results in a pretreated product.
  • Pretreated products are not particularly limited, but examples include veneers, crushed chips, classified chips, square bales, and roll bales. These are intermediate materials used in the production of PB (see Figure 5).
  • the method for manufacturing a wood board according to this embodiment includes a sieving step.
  • the fiberboard manufacturing method includes a sieving process (see Figures 1 to 3).
  • the sieving process is a process before the intermediate material production process.
  • the sieving process is a process between the intermediate material production process and the defibration process.
  • the sieving process is a process after the defibration process.
  • the fiberboard manufacturing method includes three sieving processes from start to finish, but it is sufficient to include at least one sieving process.
  • particle board manufacturing methods also include a sieving process (see Figure 4).
  • the sieving process is a process that follows the crushing process.
  • pre-processing is omitted. In this way, pre-processing may be omitted in wood board manufacturing methods.
  • the particle board manufacturing method includes three sieving processes from start to finish, but it is sufficient to include at least one sieving process.
  • the sieving process is a process of sieving based on the correspondence between a specific size and the physical properties of a wood board manufactured using wood elements of that size. Specifically, the sieving process sets optimal sieving conditions based on the above correspondence in order to obtain the desired physical properties, and is, for example, a process of sieving wood elements after a defibrating process or a crushing process, or a process of sieving wood elements before a defibrating process or a crushing process (see Figure 5).
  • Table 1 shows an example of the correspondence between specific fiber lengths and the physical properties of wood boards.
  • Air-dried OPT chips are used as the raw material. These raw materials are fed into a pelletizer to obtain a compressed product (pellets).
  • the compressed material is then pressure-defibrated in a pressure single-disc refiner to obtain defibrated fibers.
  • the resulting defibrated fibers are classified using the same method as used to measure the size distribution of the chips contained in the compressed material, and the fiber length distribution of the defibrated fibers is confirmed from the total weight of the defibrated fibers in each classified fraction.
  • wood boards (target density 0.8 g/cm 3 ) are manufactured using only the fibers separated into each classified fraction, and the bending strength and Young's modulus of bending of the obtained wood boards are then measured (see JIS A5905:2022).
  • Table 1 shows the bending strength and bending Young's modulus of wood boards obtained using only fibers of "over 3.35 mm,” “0.6-3.35 mm,” “0.3-0.6 mm,” and “under 0.3 mm.”
  • specific fiber lengths correspond to the OPT defibrated fiber classification fractions in Table 1: “over 3.35 mm,” “0.6-3.35 mm,” “0.3-0.6 mm,” and “under 0.3 mm.”
  • the “specific fiber length” range of classification fractions and number of classification fractions) can be changed depending on the mesh size and number of sieves used.
  • Table 1 shows that of the four classification fractions of "over 3.35 mm,” “0.6-3.35 mm,” “0.3-0.6 mm,” and “under 0.3 mm,” “0.6-3.35 mm” has the best mechanical properties (flexural strength and bending Young's modulus). Table 1 thus shows that the rule of thumb that longer fiber length is better does not necessarily apply.
  • Table 2 shows another example of the correspondence between specific fiber lengths and the physical properties of wood boards.
  • Table 2 was created in the same way as Table 1, except that completely dry EFB chips were used as the raw material and sieves with openings of 1.0 mm, 0.85 mm, and 0.425 mm were used.
  • Table 2 shows that of the four classification fractions of "over 1.0 mm,” “0.85-1.0 mm,” “0.425-0.85 mm,” and “under 0.425 mm,” “0.85-1.0 mm” has the best mechanical properties (flexural strength and bending Young's modulus). Table 2 thus demonstrates that the rule of thumb that longer fiber length is better is not necessarily valid.
  • sieving is performed based on the correspondence between specific fiber lengths and the physical properties of the wood board. Specifically, based on the correspondence shown in Tables 1 and 2, sieving is performed to remove classified fractions that are unlikely to contribute to improving the quality of the wood board, and to increase the proportion of classified fractions that can contribute to improving the quality of the wood board.
  • classified fractions that are unlikely to contribute to improving the quality of the wood board refer, for example, to "under 0.3 mm" in Table 1 (because both the bending strength and Young's modulus of bending are C rank) and "under 0.425 mm” in Table 2 (because both the bending strength and Young's modulus of bending are C rank).
  • classified fractions that can contribute to improving the quality of the wood board refer, for example, to "0.6-3.35 mm" in Table 1 (because both the bending strength and Young's modulus of bending are A rank) and "0.85-1.0 mm” in Table 2 (because the bending strength is A rank and the Young's modulus of bending is B rank).
  • the screening process may be carried out after the defibration process as shown in Figure 1, or it may be carried out as a pre-treatment process as shown in Figures 2 and 3.
  • sieving in the sieving process may be performed after the crushing process, as shown in Figure 4.
  • the plant biomass raw material includes at least one species selected from the group consisting of conifers, broad-leaved trees, and herbaceous plants.
  • a wide range of tree species can be used as materials for wood boards.
  • the wood board is medium density fiberboard (MDF), hardboard (HB), insulation board (IB), or particle board (PB).
  • MDF medium density fiberboard
  • HB hardboard
  • IB insulation board
  • PB particle board
  • the first aspect is a method for manufacturing a wood board using plant biomass raw materials or their intermediate materials, and includes a sieving step in which sieving is performed based on the correspondence between specific sizes and the physical properties of the wood board manufactured using wood elements having those specific sizes.
  • This method allows for the production of high-quality wood boards. More specifically, it allows for the production of wood boards with high strength and reduced variation in strength.
  • the second aspect is a method for manufacturing a wood board based on the first aspect.
  • the plant biomass raw material includes at least one species selected from the group consisting of coniferous trees, broad-leaved trees, and herbaceous plants.
  • the third aspect is a method for manufacturing a wood board based on the first or second aspect.
  • the specific size is the size of the plant biomass raw material or its intermediate material, or the size of the wood element obtained by processing the plant biomass raw material or its intermediate material.
  • This embodiment allows for a wide range of applicable material forms.
  • the fourth aspect is a method for manufacturing a wood board based on any one of the first to third aspects.
  • the wood board is a medium-density fiberboard, hardboard, insulation board, or particle board.
  • This embodiment allows for a wide variety of applicable wood boards.
  • the fifth aspect is a method for manufacturing a wood board based on any one of the first to third aspects.
  • the method for manufacturing a wood board further includes an intermediate material production process and a defibration process.
  • the sieving process is at least one of the following processes: a process before the intermediate material production process, a process between the intermediate material production process and the defibration process, and a process after the defibration process.
  • This method allows for the production of high-quality wood boards (fiberboards).
  • the sixth aspect is a method for manufacturing a wood board based on any one of the first to third aspects.
  • the method for manufacturing a wood board further includes an intermediate material production process and a crushing process.
  • the sieving process is at least one of the following processes: a process before the intermediate material production process, a process between the intermediate material production process and the crushing process, and a process after the crushing process.
  • This method allows for the production of high-quality wood boards (particle boards).

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)

Abstract

La présente invention aborde le problème de la fourniture d'un procédé de fabrication d'une planche en bois, le procédé permettant la fabrication d'une planche en bois ayant une bonne qualité. La présente divulgation concerne un procédé de fabrication d'une planche en bois à l'aide d'une matière première de biomasse végétale ou d'un matériau intermédiaire de celle-ci. Le procédé comprend une étape de tamisage pour effectuer un tamisage sur la base d'une relation de correspondance entre une taille spécifique et des propriétés physiques d'une planche en bois fabriquée à l'aide d'un élément en bois ayant la taille spécifique.
PCT/JP2025/025735 2024-08-09 2025-07-18 Procédé de fabrication d'une planche en bois Pending WO2026034162A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2024-134606 2024-08-09
JP2024134606 2024-08-09

Publications (1)

Publication Number Publication Date
WO2026034162A1 true WO2026034162A1 (fr) 2026-02-12

Family

ID=98735168

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2025/025735 Pending WO2026034162A1 (fr) 2024-08-09 2025-07-18 Procédé de fabrication d'une planche en bois

Country Status (1)

Country Link
WO (1) WO2026034162A1 (fr)

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