WO2015118814A1 - Method for producing wooden board - Google Patents

Method for producing wooden board Download PDF

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Publication number
WO2015118814A1
WO2015118814A1 PCT/JP2015/000239 JP2015000239W WO2015118814A1 WO 2015118814 A1 WO2015118814 A1 WO 2015118814A1 JP 2015000239 W JP2015000239 W JP 2015000239W WO 2015118814 A1 WO2015118814 A1 WO 2015118814A1
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WO
WIPO (PCT)
Prior art keywords
load
adhesive
mat
plant
wood
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PCT/JP2015/000239
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French (fr)
Japanese (ja)
Inventor
弘樹 塩田
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パナソニックIpマネジメント株式会社
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Publication of WO2015118814A1 publication Critical patent/WO2015118814A1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27NMANUFACTURE 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
    • B27N3/00Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08Moulding or pressing
    • B27N3/16Transporting the material from mat moulding stations to presses; Apparatus specially adapted for transporting the material or component parts therefor, e.g. cauls
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/02Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board the layer being formed of fibres, chips, or particles, e.g. MDF, HDF, OSB, chipboard, particle board, hardboard
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/12Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board next to a particulate layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27NMANUFACTURE 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
    • B27N3/00Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/002Manufacture of substantially flat articles, e.g. boards, from particles or fibres characterised by the type of binder
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27NMANUFACTURE 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
    • B27N3/00Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/04Manufacture of substantially flat articles, e.g. boards, from particles or fibres from fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27NMANUFACTURE 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
    • B27N3/00Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08Moulding or pressing
    • B27N3/20Moulding or pressing characterised by using platen-presses
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/732Dimensional properties
    • B32B2307/734Dimensional stability
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00Buildings or parts thereof

Definitions

  • the present invention relates to a method for manufacturing a wooden board.
  • wood boards containing wood chips such as wood chips and plant-derived plant particles have been used in a wide range of fields as building materials such as floor materials, wall materials and door materials for houses.
  • a wood board is manufactured by adding a synthetic resin as a binder to wood chips or plant particles, followed by heating and pressing.
  • Patent Document 1 a method for producing a long-fiber composite board that is lightweight and easy to handle but has excellent physical properties such as strength and dimensional stability.
  • a plurality of fiber layers composed of cellulose long fibers are combined and heated and pressed. For this reason, the obtained long fiber composite board has sufficient strength while being lightweight.
  • the present invention has been made in view of the circumstances as described above, and a method for manufacturing a wooden board that can improve productivity when manufacturing a wooden board excellent in basic performance such as strength and dimensional stability. It is an issue to provide.
  • a method for producing a wooden board according to the present invention includes a first step of continuously conveying a first mat-like load in which a granular adhesive is dispersed in plant fibers, and the first mat.
  • a second mat-like load in which granular adhesive is dispersed in plant fibers is continuously laminated on the surface side of the first mat-like load supplied with Including a third step, and a fourth step of sandwiching the back surface side of the first mat-shaped load and the front surface side of the second mat-shaped load, and heating and pressing to produce a wood board. It is a feature.
  • productivity when manufacturing a wooden board excellent in basic performance such as strength and dimensional stability can be improved.
  • FIG. 1 is a process cross-sectional view schematically showing an embodiment of a method for producing a wooden board of the present invention.
  • the method for manufacturing the wooden board 1 includes a first step of continuously conveying the first mat-like load 4 and a second step of supplying the adhesive chip 7 to the surface of the first mat-like load 4. .
  • the adhesive chip 7 is continuously supplied while the first mat-like load 4 is being conveyed.
  • the method for manufacturing the wooden board 1 includes a third step of laminating the second mat-shaped load 8 on the surface side of the first mat-shaped load 4 after the second step. Also in the third step, the second mat-shaped load 8 is continuously stacked while the first mat-shaped load 4 is conveyed.
  • the manufacturing method of the wooden board 1 is such that the laminate obtained by the third step is sandwiched from the back side of the first mat-like load 4 and the front side of the second mat-like load 8 and is heated and pressed.
  • a fourth step of forming the wood board 1 by molding is included.
  • the first step, the second step, the third step, and the fourth step will be described in detail below.
  • (1) 1st process The 1st mat-shaped load 4 conveyed continuously in the 1st process is made into a long thing by loading the mixture which disperse
  • the plant fiber 2a is not particularly limited as long as it is a plant fiber that is usually used for the wooden board 1, but considering basic performances such as strength, durability, and dimensional stability of the wooden board 1, hemp natural fibers and palm It is preferable that it is any 1 type or more of a fiber or an agricultural waste fiber.
  • hemp-based natural fibers include fibers collected from basts of hemp plants such as kenaf, flax, ramie, cannabis, jute, hemp, and sisal, and stems or leaves of hemp plants such as Manila hemp and sisal. Examples are fibers collected from muscle.
  • hemp-based natural fibers are obtained by mechanically defibrating plant raw materials and have a tensile strength about 2 to 14 times higher than wood fibers such as coniferous fibers and hardwood fibers.
  • the palm fiber include an oil palm fiber obtained from oil palm and a coconut fiber obtained from coco palm.
  • Examples of agricultural waste fibers include fibers made from agricultural waste such as sugar cane, corn, bamboo, and rice.
  • the average fiber length of the plant fiber 2a is not particularly limited, but considering basic performance such as strength, durability and dimensional stability of the wooden board 1, it is 5 mm or more and 100 mm or less, preferably 10 mm or more and 70 mm or less, more preferably. Is 30 mm or more and 60 mm or less.
  • the adhesion part of granular adhesive agent 3a can be increased.
  • the joint part between plant fibers 2a can be reduced, the high tensile strength of plant fiber 2a itself can be utilized more effectively. For this reason, the wood board 1 which has more excellent performance with respect to strength, surface hardness, length change due to temperature change and humidity change, etc. is realized while being low density.
  • the average fiber diameter of the plant fiber 2a is not particularly limited, but considering basic performance such as strength, durability and dimensional stability of the wooden board 1, it is 70 ⁇ m or more and 400 ⁇ m or less, preferably 100 ⁇ m or more and 350 ⁇ m or less, more preferably. Is exemplified by 150 ⁇ m or more and 300 ⁇ m or less.
  • the granular adhesive 3a dispersed in the plant fiber 2a is not particularly limited as long as it is an adhesive that is usually used for the wooden board 1.
  • examples thereof include those in which a thermosetting resin such as a phenol resin, a resorcinol resin, a urea resin, a melamine resin, an epoxy resin, a urethane resin, a furfural resin, and an isocyanate resin is used alone or in combination of two or more.
  • a sizing agent or the like can be added to the granular adhesive 3a as necessary.
  • the mixing ratio of the granular adhesive 3a in the first mat-shaped load 4 is not particularly limited, but is preferably in the range of 10% by mass to 20% by mass as the solid content after curing. If the blending ratio of the granular adhesive 3a is within the above range, the plant fibers 2a are sufficiently bonded to each other, and the strength of the obtained wood board 1 is improved.
  • the adhesive chip 7 to be supplied to the surface of the first mat-shaped load 4 is obtained by adhering the adhesive 6 to the crushed wood pieces or the plant particles 5.
  • the crushed wood pieces are not particularly limited as long as they are crushed wood pieces used for the wood board 1, but considering basic performance such as strength, durability and dimensional stability of the wood board 1, the wood pieces are crushed.
  • the resulting strip or fiber is preferred. Since the fine pieces or fibers obtained by pulverizing the wood pieces are obtained by pulverizing the end materials and the like at the time of lumbering, reduction of the manufacturing cost of the wood board 1 is expected.
  • crushed wood pieces fine pieces crushed into a wood powder or coarse pieces in the form of wood pieces can be used.
  • crushed wood pieces include those mainly made of thinned wood and building demolition materials.
  • the thinned wood include conifers such as pine, cedar and cypress, and broad-leaved trees such as lawan, capol and poplar.
  • the plant particle is not particularly limited as long as it is a plant particle that is usually used for the wooden board 1, but considering basic performance such as strength, durability, and dimensional stability of the wooden board 1, it is a hemp plant particle. It is preferable.
  • the particles of the hemp plant have the same characteristics as the hemp natural fiber used for the first mat-like load 4, and become a material of the wood board 1 excellent in basic performance such as strength and dimensional stability. .
  • Examples of the size of the crushed wood pieces or plant particles 5 include a thickness of 0.1 mm to 5 mm, a length of 1 mm to 50 mm, and a width of 0.5 mm to 10 mm. If it exists in said range, the adhesion
  • Equipment and equipment that can be used to produce the crushed wood pieces or plant particles 5 are not particularly limited.
  • a hammer mill, a drum flaker, a ring flaker, a disc refiner, or the like can be used.
  • the adhesive 6 attached to the crushed wood pieces or the plant particles 5 is not particularly limited. It can be appropriately selected and employed from thermosetting resin adhesives usually used in the production of the wood board 1.
  • thermosetting resin adhesives usually used in the production of the wood board 1.
  • an isocyanate resin adhesive composed of MDI (diphenylmethane diisocyanate), TDI (tolylene diisocyanate), MDI prepolymer, TDI prepolymer and the like is exemplified.
  • a urea resin adhesive, a melamine resin adhesive, and a urea / melamine cocondensation resin adhesive are exemplified.
  • a phenol resin adhesive a resorcinol resin adhesive, an epoxy resin adhesive, a urethane resin adhesive, and a furfural resin adhesive are exemplified.
  • These adhesives 6 can be used alone or in combination of two or more. Further, the adhesive 6 may be in the form of powder or liquid. Furthermore, the selection of the adhesive 6 can also take into consideration the water resistance of the wooden board 1 and the amount of formaldehyde released that causes sick house syndrome.
  • the isocyanate resin adhesive is a highly safe adhesive 6 because it does not use formaldehyde as a raw material. A sizing agent or the like can be added to the adhesive 6 as necessary.
  • the crushed wood pieces or the plant particles 5 are supplied onto the belt conveyor 11 and conveyed on the belt conveyor 11, while the adhesive 6 is supplied from the feeder 12.
  • the adhesive 6 can be attached to the crushed wood pieces or the plant particles 5.
  • the feeder 12 it is possible to use a quantitative feeder such as a glue blender or a conventional mixing equipment such as a ribbon blender, a high-speed mixer, or a tumbler.
  • the adhesive 6 can be supplied to the crushed wood pieces or the plant particles 5 by a predetermined amount by a rotary feeder, a screw feeder or the like provided in the production line. By doing so, it is possible to uniformly mix the crushed wood pieces or plant particles 5 and the adhesive 6.
  • the amount of the adhesive 6 to be attached to the crushed wood pieces or the plant particles 5 is not particularly limited. For example, 15 mass% or less is illustrated as solid content after hardening with respect to a crushed wood piece or the plant particle 5.
  • the adhesive chip 7 When the adhesive chip 7 is continuously supplied to the surface of the first mat-shaped load 4 after the first step, the adhesive chip 7 is put into the feeder 13 and the stirred adhesive chip 7 is supplied. It can be continuously supplied from the machine 13 to the surface side of the first mat-like load 4. Thus, the supply of the adhesive chip 7 is continuously performed on the first mat-shaped load 4 conveyed by the belt conveyor 10.
  • the second mat-shaped load 8 is continuously laminated on the surface side of the first mat-shaped load 4 after the second step as described above. Similarly to the first mat-shaped load 4, the second mat-shaped load 8 is formed by laminating a mixture in which the granular adhesive 3 b is dispersed in the vegetable fiber 2 b on the belt conveyor 10 to form a long length.
  • the plant fiber 2b and the granular adhesive 3b are put into the feeder 14 and stirred to disperse the granular adhesive 3b in the vegetable fiber 2b, and this mixture is continuously supplied from the feeder 14 to the surface side of the first mat-like load 4. To supply. By continuously supplying in this way, the second mat-like load 8 is continuously stacked on the first mat-like load 4 conveyed by the belt conveyor 10.
  • the plant fibers 2b and the granular adhesive 3b forming the second mat-shaped load 8 may be the same as or different from the plant fibers 2a and the granular adhesive 3a forming the first mat-shaped load 4. It may be.
  • the laminate obtained by the third step is heated and pressed in the press 17. Specifically, the lower press 15 is applied from the back surface side of the first mat-shaped load 4, and the upper press 16 is applied from the front surface side of the second mat-shaped load 4, so 2 The surface side of the mat-like load 8 is sandwiched. And the wood board 1 is produced by heat-press molding with the press machine 17.
  • the press machine 17 When hot press molding is performed by the press machine 17, for example, a press machine composed of a lower press 15 and an upper press 16 that are heated hot plates, or a laminate while applying pressure to a gap between a pair of heated steel belts.
  • a continuous press device or the like for conveyance can be used.
  • the heating and pressure molding conditions of the wood board 1 are not particularly limited as long as the granular adhesives 3a and 3b used and the adhesive 6 attached to the adhesive chip 7 are cured.
  • the molding temperature is in the range of 120 ° C. to 190 ° C.
  • the molding pressure is in the range of 1 MPa to 4 MPa.
  • the pressurization time can be appropriately set in consideration of the thickness and density of the wood board 1 obtained after the heat press molding, the heating temperature at the time of molding, and the like.
  • the thickness of the wood board 1 can be set within a range of 1 mm to 20 mm, for example, and is preferably 2 mm or more in consideration of basic performance such as strength, durability, and dimensional stability of the wood board 1.
  • the density of the wood board 1 can be set in the range of 600 kg / m 3 to 900 kg / m 3 , more preferably in the range of 700 kg / m 3 to 850 kg / m 3 . If the density of the wooden board 1 is within the above range, the wooden board 1 is superior in basic performance such as strength, durability, and dimensional stability, and is advantageous in terms of cost.
  • the first plant fiber layer 18 is formed on the back surface
  • the second plant fiber layer 20 is formed on the surface, between the first plant fiber layer 18 and the second plant fiber layer 20,
  • the wood board 1 in which the chip layer 19 is formed as a core layer is obtained.
  • the formation of the first plant fiber layer 18, the chip layer 19 and the second plant fiber layer 20 is continuous, and is realized at one time by heat-pressure molding.
  • the wood board 1 in which the layers 18, 19, and 20 are integrated is obtained. Therefore, the wooden board 1 excellent in basic performance such as strength, durability, and dimensional stability can be continuously manufactured, and the productivity of the wooden board 1 can be improved.
  • the wooden board 1 can be widely applied to building members such as flooring materials, wall materials and ceiling materials, door members, construction materials such as baseboards, surrounding edges, and furniture materials.
  • the productivity when manufacturing a wooden board excellent in basic performance such as strength and dimensional stability can be improved.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Manufacturing & Machinery (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

 A method for producing a wooden board includes a first step for continuously conveying a first matted load in which a granular adhesive is dispersed in plant fibers, a second step for continuously supplying the surface of the first matted load with adhesive chips for causing the adhesive to adhere to crushed wood chips or plant particles while conveying the first matted load, a third step for continuously layering a second matted load in which the granular adhesive is dispersed in plant fibers over the front surface side of the first matted load supplied with the adhesive chips while conveying the first matted load, and a fourth step for pressing together the rear surface side of the first matted load and the front surface side of the second matted load to create a wooden board by molding using heat and pressure.

Description

木質ボードの製造方法Wood board manufacturing method
 本発明は、木質ボードの製造方法に関する。 The present invention relates to a method for manufacturing a wooden board.
 従来、木片等の木質チップや植物由来の植物パーティクルを配合した木質ボードは、住宅用の床材、壁材、扉材等の建材として幅広い分野で使用されてきている。木質ボードは、例えば、木質チップや植物パーティクルにバインダーとして合成樹脂を加え、加熱加圧成形して製造される。 Conventionally, wood boards containing wood chips such as wood chips and plant-derived plant particles have been used in a wide range of fields as building materials such as floor materials, wall materials and door materials for houses. A wood board is manufactured by adding a synthetic resin as a binder to wood chips or plant particles, followed by heating and pressing.
 木質ボードを建材として使用するためには、適当な密度として強度を発現させる必要があるが、単なる高密度化では断熱性や吸湿特性など、建材として好適な特性が低下してしまうおそれがある。また、木質ボードの高密度化は重量の増大をもたらし、施工現場で扱いにくいといった問題も生じる。 In order to use a wooden board as a building material, it is necessary to develop strength as an appropriate density. However, simply increasing the density may deteriorate properties suitable as a building material such as heat insulating properties and moisture absorption properties. In addition, the densification of the wooden board increases the weight and causes a problem that it is difficult to handle at the construction site.
 そこで、軽量で取り扱いが容易でありながら、強度や寸法安定性等の物理特性に優れた長繊維複合ボードの製造方法が提案されている(例えば、特許文献1参照)。特許文献1に記載された長繊維複合ボードの製造方法では、接着剤を分散させたリグノセルロース材料を加工して得た多数のパーティクルからなるパーティクル層と、接着剤を分散させた多数本のリグノセルロース長繊維からなる繊維層とを複数組み合わせ、加熱加圧成形する。このため、得られる長繊維複合ボードは、軽量でありながら、強度が十分となる。 Therefore, there has been proposed a method for producing a long-fiber composite board that is lightweight and easy to handle but has excellent physical properties such as strength and dimensional stability (see, for example, Patent Document 1). In the method for producing a long fiber composite board described in Patent Document 1, a particle layer composed of a large number of particles obtained by processing a lignocellulosic material in which an adhesive is dispersed, and a large number of ligno in which an adhesive is dispersed. A plurality of fiber layers composed of cellulose long fibers are combined and heated and pressed. For this reason, the obtained long fiber composite board has sufficient strength while being lightweight.
日本国公開特許第2000-246709号公報Japanese Published Patent No. 2000-246709
 しかしながら、特許文献1に記載された長繊維複合ボードの製造方法は、パーティクル層および繊維層をそれぞれ個別に形成し、個別に形成した複数個の層体を接着して積層するものである。このため、長繊維複合ボードの製造は、バッチ処理であり、生産効率を上げにくいという問題が指摘される。 However, in the method for producing a long fiber composite board described in Patent Document 1, a particle layer and a fiber layer are individually formed, and a plurality of individually formed layer bodies are bonded and laminated. For this reason, the production of the long fiber composite board is a batch process, and it is difficult to increase the production efficiency.
 本発明は、以上のとおりの事情に鑑みてなされたものであり、強度や寸法安定性等の基本性能に優れた木質ボードを製造する際の生産性を向上させることができる木質ボードの製造方法を提供することを課題としている。 The present invention has been made in view of the circumstances as described above, and a method for manufacturing a wooden board that can improve productivity when manufacturing a wooden board excellent in basic performance such as strength and dimensional stability. It is an issue to provide.
 上記の課題を解決するために、本発明の木質ボードの製造方法は、植物繊維に粒状接着剤を分散させた第1マット状積載物を連続的に搬送する第1工程と、前記第1マット状積載物の表面に、前記第1マット状積載物を搬送しながら、木片粉砕品または植物パーティクルに接着剤を付着させた接着性チップを連続的に供給する第2工程と、前記接着性チップが供給された前記第1マット状積載物の表面側に、前記第1マット状積載物を搬送しながら、植物繊維に粒状接着剤を分散させた第2マット状積載物を連続的に積層する第3工程と、前記第1マット状積載物の裏面側と前記第2マット状積載物の表面側とを挟みつけ、加熱加圧成形して木質ボードを作製する第4工程とを含むことを特徴としている。 In order to solve the above-mentioned problems, a method for producing a wooden board according to the present invention includes a first step of continuously conveying a first mat-like load in which a granular adhesive is dispersed in plant fibers, and the first mat. A second step of continuously supplying an adhesive chip in which an adhesive is attached to a crushed piece of wood or a plant particle while conveying the first mat-shaped load on the surface of the load, and the adhesive chip; A second mat-like load in which granular adhesive is dispersed in plant fibers is continuously laminated on the surface side of the first mat-like load supplied with Including a third step, and a fourth step of sandwiching the back surface side of the first mat-shaped load and the front surface side of the second mat-shaped load, and heating and pressing to produce a wood board. It is a feature.
 本発明の木質ボードの製造方法によれば、強度や寸法安定性等の基本性能に優れた木質ボードを製造する際の生産性を向上させることができる。 According to the method for manufacturing a wooden board of the present invention, productivity when manufacturing a wooden board excellent in basic performance such as strength and dimensional stability can be improved.
本発明の木質ボードの製造方法の一実施形態を模式的に示した工程断面図である。It is process sectional drawing which showed typically one Embodiment of the manufacturing method of the wooden board of this invention.
 図1は、本発明の木質ボードの製造方法の一実施形態を模式的に示した工程断面図である。 FIG. 1 is a process cross-sectional view schematically showing an embodiment of a method for producing a wooden board of the present invention.
 木質ボード1の製造方法は、第1マット状積載物4を連続的に搬送する第1工程と、第1マット状積載物4の表面に、接着性チップ7を供給する第2工程とを含む。この第2工程では、接着性チップ7の供給は、第1マット状積載物4を搬送しながら連続的に行われる。 The method for manufacturing the wooden board 1 includes a first step of continuously conveying the first mat-like load 4 and a second step of supplying the adhesive chip 7 to the surface of the first mat-like load 4. . In the second step, the adhesive chip 7 is continuously supplied while the first mat-like load 4 is being conveyed.
 また、木質ボード1の製造方法は、上記第2工程後の第1マット状積載物4の表面側に第2マット状積載物8を積層する第3工程を含む。この第3工程においても、第2マット状積載物8の積層は、第1マット状積載物4を搬送しながら連続的に行われる。 Further, the method for manufacturing the wooden board 1 includes a third step of laminating the second mat-shaped load 8 on the surface side of the first mat-shaped load 4 after the second step. Also in the third step, the second mat-shaped load 8 is continuously stacked while the first mat-shaped load 4 is conveyed.
 また、木質ボード1の製造方法は、上記第3工程により得られる積層体を、第1マット状積載物4の裏面側と第2マット状積載物8の表面側とから挟みつけ、加熱加圧成形して木質ボード1を作製する第4工程を含む。 Moreover, the manufacturing method of the wooden board 1 is such that the laminate obtained by the third step is sandwiched from the back side of the first mat-like load 4 and the front side of the second mat-like load 8 and is heated and pressed. A fourth step of forming the wood board 1 by molding is included.
 上記第1工程、第2工程、第3工程、および第4工程について以下に詳述する。
(1)第1工程
 第1工程で連続的に搬送する第1マット状積載物4は、植物繊維2aに粒状接着剤3aを分散させた混合物を、ベルトコンベア上10に積載して長尺に形成したものである。植物繊維2aと粒状接着剤3aを供給機9に投入し、攪拌して植物繊維2aに粒状接着剤3aを分散させ、供給機9からベルトコンベア10上に連続的に供給し、ベルトコンベア10上に長尺の第1マット状積載物4を層状に展開する。
The first step, the second step, the third step, and the fourth step will be described in detail below.
(1) 1st process The 1st mat-shaped load 4 conveyed continuously in the 1st process is made into a long thing by loading the mixture which disperse | distributed the granular adhesive agent 3a to the vegetable fiber 2a on the belt conveyor 10. Formed. The plant fiber 2a and the granular adhesive 3a are put into the feeder 9 and stirred to disperse the granular adhesive 3a in the vegetable fiber 2a, and continuously fed from the feeder 9 onto the belt conveyor 10, and on the belt conveyor 10. The long first mat-like load 4 is developed in layers.
 植物繊維2aとしては、通常、木質ボード1に用いられる植物繊維であれば特に限定されないが、木質ボード1の強度や耐久性、寸法安定性等の基本性能を考慮すると、麻系天然繊維、ヤシ繊維または農産廃棄物繊維のいずれか1種以上であることが好ましい。麻系天然繊維としては、例えば、ケナフ、亜麻、ラミー、大麻、ジュート、ヘンプ、サイザル等の麻類植物の靭皮から採取される繊維、マニラ麻やサイザル麻等の麻類植物の茎または葉の筋から採取される繊維が例示される。これらの麻系天然繊維は、植物原料を機械的に解繊することによって得られ、針葉樹繊維や広葉樹繊維等の木材繊維に比べて約2~14倍の高い引張強度を有している。ヤシ繊維としては、例えば、油ヤシから得られる油ヤシ繊維、ココヤシから得られるココヤシ繊維が例示される。農産廃棄物繊維としては、例えば、さとうきび、とうもろこし、竹、イネ等の農産廃棄物を原料とする繊維が例示される。このような植物繊維2aを用いることによって、植物繊維2a自体の高い引張強度を有効に活用することができるため、曲げ性能および温度変化や湿度変化による長さ変化等に対して特に優れた性能を有する木質ボード1が実現される。 The plant fiber 2a is not particularly limited as long as it is a plant fiber that is usually used for the wooden board 1, but considering basic performances such as strength, durability, and dimensional stability of the wooden board 1, hemp natural fibers and palm It is preferable that it is any 1 type or more of a fiber or an agricultural waste fiber. Examples of hemp-based natural fibers include fibers collected from basts of hemp plants such as kenaf, flax, ramie, cannabis, jute, hemp, and sisal, and stems or leaves of hemp plants such as Manila hemp and sisal. Examples are fibers collected from muscle. These hemp-based natural fibers are obtained by mechanically defibrating plant raw materials and have a tensile strength about 2 to 14 times higher than wood fibers such as coniferous fibers and hardwood fibers. Examples of the palm fiber include an oil palm fiber obtained from oil palm and a coconut fiber obtained from coco palm. Examples of agricultural waste fibers include fibers made from agricultural waste such as sugar cane, corn, bamboo, and rice. By using such a plant fiber 2a, the high tensile strength of the plant fiber 2a itself can be effectively utilized, and therefore, particularly excellent performance with respect to bending performance and length change due to temperature change or humidity change, etc. The wood board 1 is provided.
 なお、植物繊維2aの平均繊維長は、特に限定されないが、木質ボード1の強度や耐久性、寸法安定性等の基本性能を考慮すると、5mm以上100mm以下、好ましくは10mm以上70mm以下、より好ましくは30mm以上60mm以下が例示される。平均繊維長が当該範囲内の植物繊維2aを用いることによって、加熱加圧成形後の木質ボード1の内部における植物繊維2aの絡み合いが多数存在するようになり、また、植物繊維2a一本当たりの粒状接着剤3aの付着部分を増やすことができる。さらに、植物繊維2a同士の継ぎ目部分を少なくできるため、植物繊維2a自体の高い引張強度をより効果的に活用することができる。このため、低密度でありながら、強度、表面硬度、温度変化や湿度変化による長さ変化等に対してより優れた性能を有する木質ボード1が実現される。 The average fiber length of the plant fiber 2a is not particularly limited, but considering basic performance such as strength, durability and dimensional stability of the wooden board 1, it is 5 mm or more and 100 mm or less, preferably 10 mm or more and 70 mm or less, more preferably. Is 30 mm or more and 60 mm or less. By using the plant fibers 2a having an average fiber length within the above range, there are many entanglements of the plant fibers 2a inside the wood board 1 after the heat and pressure molding, and moreover, per plant fiber 2a. The adhesion part of granular adhesive agent 3a can be increased. Furthermore, since the joint part between plant fibers 2a can be reduced, the high tensile strength of plant fiber 2a itself can be utilized more effectively. For this reason, the wood board 1 which has more excellent performance with respect to strength, surface hardness, length change due to temperature change and humidity change, etc. is realized while being low density.
 また、植物繊維2aの平均繊維径は、特に限定されないが、木質ボード1の強度や耐久性、寸法安定性等の基本性能を考慮すると、70μm以上400μm以下、好ましくは100μm以上350μm以下、より好ましくは150μm以上300μm以下が例示される。平均繊維径が当該範囲内の植物繊維2aを用いることによって、植物繊維2a間に適度な空隙が生まれ、空隙内に粒状接着剤3aを均一に分散させることができる。また、植物繊維2aの剛直性によって植物繊維2a同士の絡み合いが多数存在するようになり、十分な強度を備えた木質ボード1を得ることができる。 The average fiber diameter of the plant fiber 2a is not particularly limited, but considering basic performance such as strength, durability and dimensional stability of the wooden board 1, it is 70 μm or more and 400 μm or less, preferably 100 μm or more and 350 μm or less, more preferably. Is exemplified by 150 μm or more and 300 μm or less. By using the plant fiber 2a having an average fiber diameter within the above range, an appropriate gap is created between the plant fibers 2a, and the granular adhesive 3a can be uniformly dispersed in the gap. Moreover, many entanglements of the plant fibers 2a exist due to the rigidity of the plant fibers 2a, and the wood board 1 having sufficient strength can be obtained.
 植物繊維2aに分散させる粒状接着剤3aとしては、通常、木質ボード1に用いられる接着剤であれば、特に限定されない。例えば、フェノール樹脂、レゾルシノール樹脂、ユリア樹脂、メラミン樹脂、エポキシ樹脂、ウレタン樹脂、フルフラール樹脂、イソシアネート樹脂等の熱硬化性樹脂を単独または2種類以上を併用したものが例示される。このような粒状接着剤3aには、必要に応じて、サイズ剤等を添加することができる。 The granular adhesive 3a dispersed in the plant fiber 2a is not particularly limited as long as it is an adhesive that is usually used for the wooden board 1. Examples thereof include those in which a thermosetting resin such as a phenol resin, a resorcinol resin, a urea resin, a melamine resin, an epoxy resin, a urethane resin, a furfural resin, and an isocyanate resin is used alone or in combination of two or more. A sizing agent or the like can be added to the granular adhesive 3a as necessary.
 なお、第1マット状積載物4における粒状接着剤3aの配合比率は、特に限定されないが、硬化後の固形分として10質量%~20質量%の範囲内であることが好ましい。粒状接着剤3aの配合比率が上記の範囲内にあれば、植物繊維2a同士の接着が充分となり、得られる木質ボード1の強度が良好となる。
(2)第2工程
 第2工程で、第1マット状積載物4の表面に供給する接着性チップ7は、木片粉砕品または植物パーティクル5に接着剤6を付着させたものである。
The mixing ratio of the granular adhesive 3a in the first mat-shaped load 4 is not particularly limited, but is preferably in the range of 10% by mass to 20% by mass as the solid content after curing. If the blending ratio of the granular adhesive 3a is within the above range, the plant fibers 2a are sufficiently bonded to each other, and the strength of the obtained wood board 1 is improved.
(2) Second Step In the second step, the adhesive chip 7 to be supplied to the surface of the first mat-shaped load 4 is obtained by adhering the adhesive 6 to the crushed wood pieces or the plant particles 5.
 木片粉砕品としては、通常、木質ボード1に用いられる木片粉砕品であれば特に限定されないが、木質ボード1の強度や耐久性、寸法安定性等の基本性能を考慮すると、木片を粉砕して得られる細片または繊維であることが好ましい。木片を粉砕して得られる細片または繊維は、製材時の端材等を粉砕することによって得られるため、木質ボード1の製造コスト低減が期待される。 The crushed wood pieces are not particularly limited as long as they are crushed wood pieces used for the wood board 1, but considering basic performance such as strength, durability and dimensional stability of the wood board 1, the wood pieces are crushed. The resulting strip or fiber is preferred. Since the fine pieces or fibers obtained by pulverizing the wood pieces are obtained by pulverizing the end materials and the like at the time of lumbering, reduction of the manufacturing cost of the wood board 1 is expected.
 また、木片粉砕品として、木粉状に粉砕した微小片や木片状の粗大片も用いることができる。 Also, as the crushed wood pieces, fine pieces crushed into a wood powder or coarse pieces in the form of wood pieces can be used.
 このような木片粉砕品としては、例えば、間伐材や建築解体材を主とするものが例示される。間伐材としては、例えば、マツ、スギ、ヒノキ等の針葉樹、またはラワン、カポール、ポプラ等の広葉樹が例示される。 Examples of such crushed wood pieces include those mainly made of thinned wood and building demolition materials. Examples of the thinned wood include conifers such as pine, cedar and cypress, and broad-leaved trees such as lawan, capol and poplar.
 植物パーティクルとしては、通常、木質ボード1に用いられる植物パーティクルであれば特に限定されないが、木質ボード1の強度や耐久性、寸法安定性等の基本性能を考慮すると、麻系植物のパーティクルであることが好ましい。麻系植物のパーティクルは、第1マット状積載物4に用いた麻系天然繊維と同様の特性を有しており、強度や寸法安定性等の基本性能に優れた木質ボード1の材料となる。 The plant particle is not particularly limited as long as it is a plant particle that is usually used for the wooden board 1, but considering basic performance such as strength, durability, and dimensional stability of the wooden board 1, it is a hemp plant particle. It is preferable. The particles of the hemp plant have the same characteristics as the hemp natural fiber used for the first mat-like load 4, and become a material of the wood board 1 excellent in basic performance such as strength and dimensional stability. .
 木片粉砕品または植物パーティクル5の大きさは、例えば、厚みが0.1mm~5mmであり、長さが1mm~50mmであり、かつ幅が0.5mm~10mmの範囲内が例示される。上記の範囲内にあれば、木片粉砕品または植物パーティクル5同士の接着が充分となり、得られる木質ボード1の強度が良好となる。 Examples of the size of the crushed wood pieces or plant particles 5 include a thickness of 0.1 mm to 5 mm, a length of 1 mm to 50 mm, and a width of 0.5 mm to 10 mm. If it exists in said range, the adhesion | attachment of crushed wood pieces or the plant particle 5 will become enough, and the intensity | strength of the obtained wooden board 1 will become favorable.
 木片粉砕品または植物パーティクル5の作製に使用可能な機器および設備は、特に限定されない。例えば、ハンマーミル、ドラムフレーカー、リングフレーカー、ディスクリファイナー等を用いることができる。 Equipment and equipment that can be used to produce the crushed wood pieces or plant particles 5 are not particularly limited. For example, a hammer mill, a drum flaker, a ring flaker, a disc refiner, or the like can be used.
 木片粉砕品または植物パーティクル5に付着させる接着剤6も、特に限定されない。木質ボード1の製造に通常用いられている熱硬化性樹脂接着剤の中から適宜選択して採用することができる。例えば、MDI(ジフェニルメタンジイソシアネート)、TDI(トリレンジイソシアネート)、MDIプレポリマー、TDIプレポリマー等よりなるイソシアネート樹脂接着剤が例示される。また、ユリア樹脂接着剤、メラミン樹脂接着剤、ユリア・メラミン共縮合樹脂接着剤が例示される。さらに、フェノール樹脂接着剤、レゾルシノール樹脂接着剤、エポキシ樹脂接着剤、ウレタン樹脂接着剤、フルフラール樹脂接着剤が例示される。これらの接着剤6は、単独または2種類以上の併用が可能である。また、接着剤6は、粉末状または液状のいずれの形態であってもよい。さらに、接着剤6の選択には、木質ボード1の耐水性や、シックハウス症候群の原因となるホルムアルデヒドの放出量等をも考慮することができる。イソシアネート樹脂接着剤は、ホルムアルデヒドを原料としないため、安全性の高い接着剤6である。接着剤6には、必要に応じてサイズ剤等を添加することができる。 The adhesive 6 attached to the crushed wood pieces or the plant particles 5 is not particularly limited. It can be appropriately selected and employed from thermosetting resin adhesives usually used in the production of the wood board 1. For example, an isocyanate resin adhesive composed of MDI (diphenylmethane diisocyanate), TDI (tolylene diisocyanate), MDI prepolymer, TDI prepolymer and the like is exemplified. Moreover, a urea resin adhesive, a melamine resin adhesive, and a urea / melamine cocondensation resin adhesive are exemplified. Furthermore, a phenol resin adhesive, a resorcinol resin adhesive, an epoxy resin adhesive, a urethane resin adhesive, and a furfural resin adhesive are exemplified. These adhesives 6 can be used alone or in combination of two or more. Further, the adhesive 6 may be in the form of powder or liquid. Furthermore, the selection of the adhesive 6 can also take into consideration the water resistance of the wooden board 1 and the amount of formaldehyde released that causes sick house syndrome. The isocyanate resin adhesive is a highly safe adhesive 6 because it does not use formaldehyde as a raw material. A sizing agent or the like can be added to the adhesive 6 as necessary.
 木片粉砕品または植物パーティクル5に接着剤6を付着させる際には、木片粉砕品または植物パーティクル5をベルトコンベア11上に供給し、ベルトコンベア11上を搬送しながら、供給機12から接着剤6を供給して、木片粉砕品または植物パーティクル5に接着剤6を付着させることができる。供給機12としては、グルーブレンダー等の定量供給機の使用や、従来用いられているリボンブレンダー、高速ミキサー、タンブラー等の混合設備の使用が可能である。この他、製造ラインに設けたロータリフィーダー、スクリューフィーダー等で木片粉砕品または植物パーティクル5に一定量ずつ接着剤6を供給することもできる。このようにすることによって、木片粉砕品または植物パーティクル5と接着剤6との均一な混合が可能となる。 When adhering the adhesive 6 to the crushed wood pieces or the plant particles 5, the crushed wood pieces or the plant particles 5 are supplied onto the belt conveyor 11 and conveyed on the belt conveyor 11, while the adhesive 6 is supplied from the feeder 12. The adhesive 6 can be attached to the crushed wood pieces or the plant particles 5. As the feeder 12, it is possible to use a quantitative feeder such as a glue blender or a conventional mixing equipment such as a ribbon blender, a high-speed mixer, or a tumbler. In addition, the adhesive 6 can be supplied to the crushed wood pieces or the plant particles 5 by a predetermined amount by a rotary feeder, a screw feeder or the like provided in the production line. By doing so, it is possible to uniformly mix the crushed wood pieces or plant particles 5 and the adhesive 6.
 木片粉砕品または植物パーティクル5に付着させる接着剤6の添加量は、特に限定されない。例えば、木片粉砕品または植物パーティクル5に対して、硬化後の固形分として15質量%以下が例示される。 The amount of the adhesive 6 to be attached to the crushed wood pieces or the plant particles 5 is not particularly limited. For example, 15 mass% or less is illustrated as solid content after hardening with respect to a crushed wood piece or the plant particle 5.
 第1工程後の第1マット状積載物4の表面に、接着性チップ7を連続的に供給する際には、接着性チップ7を供給機13に投入し、攪拌した接着性チップ7を供給機13から第1マット状積載物4の表面側に連続的に供給することができる。このように、接着性チップ7の供給は、ベルトコンベア10により搬送される第1マット状積載物4に対し連続的に行われる。
(3)第3工程
 第3工程では、上記のとおりの第2工程後の第1マット状積載物4の表面側に、第2マット状積載物8を連続的に積層する。第2マット状積載物8も、第1マット状積載物4と同様に、植物繊維2bに粒状接着剤3bを分散させた混合物を、ベルトコンベア上10に積載して長尺に形成したものである。植物繊維2bと粒状接着剤3bを供給機14に投入し、攪拌して植物繊維2bに粒状接着剤3bを分散させ、この混合物を供給機14から第1マット状積載物4の表面側に連続的に供給する。このように連続的に供給することにより、第2マット状積載物8の積層は、ベルトコンベア10により搬送される第1マット状積載物4に対し連続的に行われる。
When the adhesive chip 7 is continuously supplied to the surface of the first mat-shaped load 4 after the first step, the adhesive chip 7 is put into the feeder 13 and the stirred adhesive chip 7 is supplied. It can be continuously supplied from the machine 13 to the surface side of the first mat-like load 4. Thus, the supply of the adhesive chip 7 is continuously performed on the first mat-shaped load 4 conveyed by the belt conveyor 10.
(3) Third Step In the third step, the second mat-shaped load 8 is continuously laminated on the surface side of the first mat-shaped load 4 after the second step as described above. Similarly to the first mat-shaped load 4, the second mat-shaped load 8 is formed by laminating a mixture in which the granular adhesive 3 b is dispersed in the vegetable fiber 2 b on the belt conveyor 10 to form a long length. is there. The plant fiber 2b and the granular adhesive 3b are put into the feeder 14 and stirred to disperse the granular adhesive 3b in the vegetable fiber 2b, and this mixture is continuously supplied from the feeder 14 to the surface side of the first mat-like load 4. To supply. By continuously supplying in this way, the second mat-like load 8 is continuously stacked on the first mat-like load 4 conveyed by the belt conveyor 10.
 第2マット状積載物8を形成する植物繊維2bおよび粒状接着剤3bは、第1マット状積載物4を形成する植物繊維2aおよび粒状接着剤3aと同種のものであっても、異種のものであってもよい。
(4)第4工程
 第4工程では、上記第3工程により得られる積層体をプレス機17において加熱加圧成形する。具体的には、第1マット状積載物4の裏面側より下プレス15を、第2マット状積載物8の表面側より上プレス16をあてがい、第1マット状積載物4の裏面側と第2マット状積載物8の表面側とを挟みつける。そして、プレス機17により加熱加圧成形して木質ボード1を作製する。
The plant fibers 2b and the granular adhesive 3b forming the second mat-shaped load 8 may be the same as or different from the plant fibers 2a and the granular adhesive 3a forming the first mat-shaped load 4. It may be.
(4) Fourth Step In the fourth step, the laminate obtained by the third step is heated and pressed in the press 17. Specifically, the lower press 15 is applied from the back surface side of the first mat-shaped load 4, and the upper press 16 is applied from the front surface side of the second mat-shaped load 4, so 2 The surface side of the mat-like load 8 is sandwiched. And the wood board 1 is produced by heat-press molding with the press machine 17.
 プレス機17により加熱加圧成形する際には、例えば、加熱した熱板である下プレス15と上プレス16からなるプレス装置や、加熱した一対のスチールベルトの隙間に圧力を加えながら積層物を搬送する連続プレス装置等を用いることができる。木質ボード1の加熱加圧成形条件は、用いた粒状接着剤3a、3bや接着性チップ7に付着した接着剤6が硬化する条件であれば特に限定されない。例えば、成形温度として120℃~190℃の範囲、成形圧力として1MPa~4MPaの範囲が例示される。加圧時間は、加熱加圧成形後に得られる木質ボード1の板厚や密度、成形時の加熱温度等を考慮して適宜設定することができる。木質ボード1の厚みについては、例えば、1mm~20mmの範囲内に設定することができ、木質ボード1の強度や耐久性、寸法安定性等の基本性能を考慮すると、2mm以上とするのが好ましい。木質ボード1の密度については、600kg/m~900kg/mの範囲内、より好ましくは700kg/m~850kg/mの範囲内に設定することができる。木質ボード1の密度が上記の範囲内であれば、木質ボード1は、強度や耐久性、寸法安定性等の基本性能により優れ、しかも、コスト面で有利となる。 When hot press molding is performed by the press machine 17, for example, a press machine composed of a lower press 15 and an upper press 16 that are heated hot plates, or a laminate while applying pressure to a gap between a pair of heated steel belts. A continuous press device or the like for conveyance can be used. The heating and pressure molding conditions of the wood board 1 are not particularly limited as long as the granular adhesives 3a and 3b used and the adhesive 6 attached to the adhesive chip 7 are cured. For example, the molding temperature is in the range of 120 ° C. to 190 ° C., and the molding pressure is in the range of 1 MPa to 4 MPa. The pressurization time can be appropriately set in consideration of the thickness and density of the wood board 1 obtained after the heat press molding, the heating temperature at the time of molding, and the like. The thickness of the wood board 1 can be set within a range of 1 mm to 20 mm, for example, and is preferably 2 mm or more in consideration of basic performance such as strength, durability, and dimensional stability of the wood board 1. . The density of the wood board 1 can be set in the range of 600 kg / m 3 to 900 kg / m 3 , more preferably in the range of 700 kg / m 3 to 850 kg / m 3 . If the density of the wooden board 1 is within the above range, the wooden board 1 is superior in basic performance such as strength, durability, and dimensional stability, and is advantageous in terms of cost.
 このような第4工程を経て、裏面に第1植物繊維層18が形成され、表面に第2植物繊維層20が形成され、第1植物繊維層18と第2植物繊維層20の間に、芯層としてチップ層19が形成された木質ボード1が得られる。 Through such a fourth step, the first plant fiber layer 18 is formed on the back surface, the second plant fiber layer 20 is formed on the surface, between the first plant fiber layer 18 and the second plant fiber layer 20, The wood board 1 in which the chip layer 19 is formed as a core layer is obtained.
 上記のとおりの木質ボード1の製造方法は、第1植物繊維層18、チップ層19および第2植物繊維層20の形成が連続的であり、しかも加熱加圧成形により一度に実現され、それらの層18、19、20が一体となった木質ボード1が得られる。したがって、強度や耐久性、寸法安定性等の基本性能に優れた木質ボード1を、連続的に製造することが可能となり、木質ボード1の生産性を向上させることができる。 In the manufacturing method of the woody board 1 as described above, the formation of the first plant fiber layer 18, the chip layer 19 and the second plant fiber layer 20 is continuous, and is realized at one time by heat-pressure molding. The wood board 1 in which the layers 18, 19, and 20 are integrated is obtained. Therefore, the wooden board 1 excellent in basic performance such as strength, durability, and dimensional stability can be continuously manufactured, and the productivity of the wooden board 1 can be improved.
 木質ボード1は、床材、壁材、天井材等の建築部材、扉部材、巾木、廻り縁等の造作部材、家具用材料等の幅広く適用することができる。 The wooden board 1 can be widely applied to building members such as flooring materials, wall materials and ceiling materials, door members, construction materials such as baseboards, surrounding edges, and furniture materials.
 1 木質ボード
 2a、2b 植物繊維
 3a、3b 粒状接着剤
 4 第1マット状積載物
 5 木片粉砕品または植物パーティクル
 6 接着剤
 7 接着性チップ
 8 第2マット状積載物
DESCRIPTION OF SYMBOLS 1 Wood board 2a, 2b Plant fiber 3a, 3b Granular adhesive 4 1st mat-like load 5 Wood piece ground product or plant particle 6 Adhesive 7 Adhesive chip 8 2nd mat-like load
産業利用上の可能性Potential for industrial use
 本発明の木質ボードの製造方法によれば、強度や寸法安定性等の基本性能に優れた木質ボードを製造する際の生産性が向上可能である。 According to the method for manufacturing a wooden board of the present invention, the productivity when manufacturing a wooden board excellent in basic performance such as strength and dimensional stability can be improved.

Claims (4)

  1.  植物繊維に粒状接着剤を分散させた第1マット状積載物を連続的に搬送する第1工程と、
     前記第1マット状積載物の表面に、前記第1マット状積載物を搬送しながら、木片粉砕品または植物パーティクルに接着剤を付着させた接着性チップを連続的に供給する第2工程と、
     前記接着性チップが供給された前記第1マット状積載物の表面側に、前記第1マット状積載物を搬送しながら、植物繊維に粒状接着剤を分散させた第2マット状積載物を連続的に積層する第3工程と、
     前記第1マット状積載物の裏面側と第2マット状積載物の表面側とを挟みつけ、加熱加圧成形して木質ボードを作製する第4工程と
    を含むことを特徴とする木質ボードの製造方法。
    A first step of continuously conveying a first mat-like load in which a granular adhesive is dispersed in plant fibers;
    A second step of continuously supplying an adhesive chip in which an adhesive is adhered to a crushed wood piece or a plant particle while conveying the first mat-shaped load to the surface of the first mat-shaped load;
    A second mat-like load in which a granular adhesive is dispersed in plant fibers is continuously conveyed to the surface side of the first mat-like load supplied with the adhesive chip while the first mat-like load is conveyed. A third step of automatically stacking,
    A fourth step of producing a wood board by sandwiching a back side of the first mat-like load and a front side of the second mat-like load and forming by heating and pressing. Production method.
  2.  前記植物繊維が、麻系天然繊維、ヤシ繊維または農産廃棄物繊維のいずれか1種以上であることを特徴とする請求項1に記載の木質ボードの製造方法。 The method for producing a wooden board according to claim 1, wherein the plant fiber is one or more of hemp-based natural fiber, palm fiber, or agricultural waste fiber.
  3.  前記木片粉砕品が、木片を粉砕して得られる細片または繊維であることを特徴とする請求項1または2に記載の木質ボードの製造方法。 The method for producing a wood board according to claim 1 or 2, wherein the crushed wood pieces are fine pieces or fibers obtained by pulverizing wood pieces.
  4.  前記植物パーティクルが、麻系植物のパーティクルであることを特徴とする請求項1から3のいずれか一項に記載の木質ボードの製造方法。 The method for producing a wooden board according to any one of claims 1 to 3, wherein the plant particles are particles of a hemp plant.
PCT/JP2015/000239 2014-02-06 2015-01-20 Method for producing wooden board WO2015118814A1 (en)

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