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WO2016056207A1 - Procédé de production de carton à base de plantes, et carton à base de plantes - Google Patents

Procédé de production de carton à base de plantes, et carton à base de plantes Download PDF

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Publication number
WO2016056207A1
WO2016056207A1 PCT/JP2015/004997 JP2015004997W WO2016056207A1 WO 2016056207 A1 WO2016056207 A1 WO 2016056207A1 JP 2015004997 W JP2015004997 W JP 2015004997W WO 2016056207 A1 WO2016056207 A1 WO 2016056207A1
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Prior art keywords
plant
pieces
orientation
adhesive
board
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Ceased
Application number
PCT/JP2015/004997
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English (en)
Japanese (ja)
Inventor
菅原　亮
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Publication of WO2016056207A1 publication Critical patent/WO2016056207A1/fr
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    • 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
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/02—Layered 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

Definitions

  • the present disclosure relates to a method for producing a plant board and a plant board.
  • Patent Document 1 A method of manufacturing a fiberboard by hot-pressing long kenaf fibers dispersed in an adhesive is known (Patent Document 1).
  • the content of lignin is 15 wt% or more, 20 wt% or less, and density of 0.15 g / cm 3 or more, a plurality of plant pieces is 0.20 g / cm 3 or less,
  • the adhesive applied to each of the plurality of plant pieces is hot-press molded, and each of the plurality of plant pieces is bonded to each other by curing of the adhesive.
  • FIG. 1 is a partial cross-sectional view of a plant board before hot pressing according to an embodiment.
  • FIG. 2 is a partial cross-sectional view of the plant board after hot pressing according to the embodiment.
  • Drawing 3 is a figure explaining orientation of a plurality of plant pieces in each layer of a plurality of layers of plant boards concerning an embodiment.
  • a plant-based board is formed by hot-pressing long kenaf fibers dispersed in an adhesive. Therefore, it has been difficult to uniformly disperse the long fiber kenaf and cure the adhesive. If the distribution of kenaf in the plant board becomes non-uniform, it will cause a decrease in bending strength. In addition, it has been difficult to lower the rate of expansion of the absorption thickness of plant-based boards containing long fiber kenaf.
  • constituent elements in the embodiment constituent elements that are not described in the independent claims indicating the highest concept of the present disclosure are described as arbitrary constituent elements. Accordingly, numerical values, shapes, materials, components, arrangement positions and connection forms of components, steps, order of steps, and the like shown in the following embodiments are merely examples, and do not limit the present disclosure.
  • FIG. 1 is a cross-sectional view of a plant board before hot pressing according to this embodiment.
  • FIG. 2 is a cross-sectional view of the plant board after hot pressing according to the present embodiment.
  • FIG. 3 is a diagram for explaining the orientation of a plurality of plant pieces in each layer of a plurality of plant-based boards according to this embodiment.
  • the plant-based board 10 includes a plurality of plant pieces 1 having a lignin content of 15 wt% or more and 20 wt% or less and a density of 0.15 g / cm 3 or more and 0.20 g / cm 3 or less. It is formed by hot-pressing the adhesive 2 attached to each of the plurality of plant pieces 1. Each of the plurality of plant pieces 1 is bonded by curing the adhesive 2.
  • the plant piece 1 has an elongated flake shape, and is obtained by cutting and pulverizing a plant with a flaker, a hammer mill, a ring breaker, or the like.
  • any part such as a stem, a bark, a seed, or a leaf of a herbaceous plant or a woody plant can be used, and one kind may be used, or two or more kinds may be used at the same time. .
  • the plant used for the plant piece 1 can be used in various states such as unused ones, wastes, and recycled materials.
  • the plant piece 1 having a lignin content of 20 wt% or less and a density of 0.20 g / cm 3 or less obtained by pulverizing and cutting the stem core of a herbaceous plant is used.
  • the lower limit of the preferred lignin content is 15 wt%.
  • the lower limit of the preferred density is 0.15 g / cm 3 .
  • Herbaceous plants include kenaf, jute such as Kuma and Shimatsunaso.
  • the stem core part of the herbaceous plant can be obtained by removing the bast fibers existing in the outer peripheral part such as kenaf and jute.
  • Adhesives 2 include thermosetting resins such as urea resins, melamine resins, phenol resins, resorcinol resins, epoxy resins, urethane resins, furfural resins, isocyanate resins, and sugars such as sucrose. And a heat-curing binder obtained by reacting a polyvalent carboxylic acid such as citric acid with an acid such as p-toluenesulfonic acid.
  • the adhesive 2 is attached to the plant piece 1.
  • the deposition method include the following methods. A method of spraying the liquid adhesive 2 while rotating the plant piece 1 in the drum using an apparatus such as a drum blender. A method of immersing the plant piece 1 in a tank filled with the liquid adhesive 2. The method of mixing the plant piece 1 and the powdery adhesive 2 using apparatuses, such as a mixer. The amount of the adhesive 2 is not particularly limited as long as the plurality of plant pieces 1 are bonded to each other with sufficient strength. In this embodiment, 10 to 15 wt% of the adhesive is used with respect to the total weight of the plant piece 1.
  • the plant piece 1 to which the adhesive 2 is applied is placed in a plate shape as shown in FIG. 1 and then hot-press molded, and the plant pieces 1 are bonded to each other so that the plant-based board is formed as shown in FIG. can get.
  • the plant piece 1 preferably has an elongated shape with a length of 50 mm or more. Thereby, compared with the case where the plant piece 1 less than 50 mm in length is used, the plant-type board 10 of high bending strength is obtained. There is no particular upper limit on the length of the plant piece 1, but considering the productivity, the length of the plant piece 1 is preferably 200 mm or less. Considering that part of the plant piece 1 is crushed in the production process, the majority of the plant pieces 1 included in the plant board 10 are preferably 50 mm in length and 200 mm or less in length.
  • the plant pieces 1 to which the adhesive 2 is applied may be arranged randomly or may be arranged with the plant pieces 1 oriented in an arbitrary direction. Moreover, the plant piece 1 to which the adhesive 2 is adhered may be arranged in a single plate shape, or may be arranged so as to laminate a plurality of layers.
  • each layer may be composed of the same or different plant pieces 1. Moreover, when laminating
  • FIG. 3 is a perspective view showing a state in which each layer is developed in a direction perpendicular to the plane direction (XY plane) (Z axis) in order to explain the configuration of the plant-based board 20.
  • the plant-based board 20 having a plurality of layers includes a first plurality of plant pieces 11 constituting the first surface layer 20A1, a second plurality of plant pieces 12 constituting the second surface layer 20A2, and a first surface layer.
  • a plurality of plant pieces that are provided between 20A1 and the second surface layer 20A2 and are composed of a plurality of third plant pieces 13 constituting the core layer 20B, and an adhesive (not shown) are hot-press molded. Is formed.
  • the first plurality of plant pieces 11, the third plurality of plant pieces 13, and the second plurality of plant pieces 12 overlap in this order, and are bonded by curing the adhesive.
  • the plant pieces constituting each layer have the same orientation.
  • the orientation indicates the longest length direction of the elongated plant piece.
  • the first plurality of plant pieces 11 are aligned in the first orientation D1
  • the second plurality of plant pieces 12 are aligned in the second orientation D2
  • the third plurality of plant pieces 13 are It is aligned with the third orientation D3.
  • first orientation D1 and the second orientation D2 are preferably orthogonal to the third orientation D3.
  • first orientation D1 and the second orientation D2 are oriented in the Y-axis direction.
  • the third orientation D3 is oriented in the X-axis direction.
  • Hot pressing is performed by batch type flat plate press or continuous press.
  • the pressing temperature, pressing time, pressing pressure, and the like are appropriately set according to the type of the adhesive 2 to be used and the thickness of the plant board to be molded.
  • Example 1 a crushed stalk core obtained by pulverizing a stalk core with a hammer mill was used as the plant piece 1.
  • the lignin content of the june stalk core was 15 wt%, and the density of the june stalk core was 0.17 g / cm 3 .
  • the content of lignin can be quantified by, for example, the Van Soest method.
  • As the adhesive 2 a urea melamine resin adhesive (for example, TB103 manufactured by Oshika) was used.
  • the average particle size of the ground stalk core used in this example was 2.2 mm. For example, the average particle diameter can be determined by a screening test based on JISZ8815.
  • a urea melamine resin-based adhesive was spray-applied to the crushed stalk core and adhered.
  • the weight of the urea melamine resin-based adhesive was 15 wt% with respect to the weight of the crushed stalk core.
  • crushed stalk cores coated with a urea melamine resin adhesive were randomly arranged in a single-layer plate shape.
  • a hot-pressure molding machine for example, SF60 manufactured by Shinfuji Metal Industry
  • Example 2 In the present example, as the plant piece 1, a pulverized pine shoot stem core obtained by pulverizing a pine shoot stem core with a ring flaker was used. The content of lignin in the pine stem stem core was 14 wt%, and the density of the pine stem stem core was 0.16 g / cm 3 .
  • the adhesive 2 10 parts by mass of sucrose (for example, manufactured by Wako Pure Chemical), 4 parts by mass of citric acid (for example, manufactured by Wako Pure Chemical) and p-toluenesulfonic acid (for example, manufactured by Wako Pure Chemical) 2 A saccharic acid-based adhesive mixed with parts by mass and further dissolved in water was used.
  • the pulverized pine needle stem core used in this example had an average length of 8 mm, an average width of 2 mm, and an average thickness of 1 mm.
  • a sugar-based adhesive was spray-applied to and adhered to a ground pine stalk core using a drum blender.
  • the weight of the saccharide-based adhesive was 15 wt% with respect to the weight of the ground stalks of Shimashimaso stem.
  • the pulverized Shimano stalk core coated with a saccharide adhesive was randomly arranged in a single-layer plate shape. Then, using a hot press molding machine, the plant board was molded by hot pressing at a press temperature of 200 ° C., a press pressure of 25 ⁇ 10 5 Pa, and a press time of 10 minutes.
  • Example 3 a kenaf stalk core strand obtained by pulverizing a kenaf stalk core with a flaker was used as the plant piece 1.
  • the lignin content of the kefna stalk core was 19 wt%, and the density of the kefna stalk core was 0.15 g / cm 3 .
  • As the adhesive 2 a phenol resin adhesive (for example, B1360 manufactured by Oshika) was used.
  • the kenaf stalk core strand used in this example had an average length of 55 mm, an average width of 12 mm, and an average thickness of 0.6 mm.
  • a phenol resin adhesive was spray-coated on the kenaf stalk core strand by a drum blender and attached.
  • the weight of the phenol resin adhesive was 15 wt% with respect to the weight of the kenaf stalk core strand.
  • the first surface layer, the core layer, and the second surface layer were laminated in the following order.
  • a first surface layer a kenaf stalk core strand coated with a phenol resin adhesive was oriented in one direction.
  • the core layer was arranged on the first surface layer so as to be oriented in a direction orthogonal to the orientation of the first surface layer.
  • the second surface layer was arranged on the core layer so as to be oriented in a direction orthogonal to the orientation of the core layer.
  • the plant board was molded by hot pressing at a press temperature of 200 ° C., a press pressure of 25 ⁇ 10 5 Pa, and a press time of 10 minutes.
  • Example 4 In the present Example, as the plant piece 1, a jum stalk core strand obtained by cutting a jum stalk core in the length direction was used. The lignin content of the june stalk core was 15 wt%, and the density of the june stalk core was 0.17 g / cm 3 .
  • As the adhesive 2 an isocyanate resin adhesive (for example, a wood cure manufactured by Nippon Polyurethane Industry) was used.
  • the juvenile stem core strand used in this example had an average length of 200 mm, an average width of 12 mm, and an average thickness of 12 mm.
  • an isocyanate resin-based adhesive was spray-coated on the stalk core strand, and was attached.
  • the weight of the isocyanate resin-based adhesive was 10 wt% with respect to the weight of the stalk core strand.
  • the first surface layer, the core layer, and the second surface layer were laminated in the following order.
  • a juvenile stem core strand coated with an isocyanate resin adhesive was oriented in one direction.
  • the core layer was arranged on the first surface layer so as to be oriented in a direction orthogonal to the orientation of the first surface layer.
  • the second surface layer was arranged on the core layer so as to be oriented in a direction orthogonal to the orientation of the core layer.
  • the plant board was molded by hot pressing at a press temperature of 200 ° C., a press pressure of 25 ⁇ 10 5 Pa, and a press time of 10 minutes.
  • Comparative Example 1 a crushed softwood material obtained by pulverizing with a hammer mill was used as the plant piece 1.
  • the lignin content in the crushed softwood material was 28 wt%, and the density of the crushed softwood material was 0.46 g / cm 3 .
  • the average particle diameter of the crushed softwood material used in this comparative example was 2.2 mm.
  • Example 2 Other conditions were the same as in Example 1, and a plant-based board was molded.
  • Comparative Example 2 a pulverized balsa material obtained by pulverization with a ring flaker was used.
  • the content of lignin in the balsa material was 24 wt%, and the density of the balsa material was 0.19 g / cm 3 .
  • the pulverized balsa material had an average length of 8 mm, an average width of 2 mm, and an average thickness of 1 mm.
  • Example 2 Other conditions were the same as in Example 2, and a plant-based board was molded.
  • pulverizing a balsa material with a flaker as the plant piece 1 was used.
  • the content of lignin in the balsa material was 24 wt%, and the density of the balsa material was 0.19 g / cm 3 .
  • the balsa material strands had an average length of 8 mm, an average width of 2 mm, and an average thickness of 1 mm.
  • Example 3 Other conditions were the same as in Example 3, and a plant board was molded.
  • Comparative Example 4 a crushed stalk core obtained by pulverizing a stalk core with a hammer mill was used as the plant piece 1.
  • the lignin content of the june stalk core was 25 wt%, and the density of the june stalk core was 0.19 g / cm 3 .
  • the average particle size of the crushed stalk core used in this comparative example was 2.2 mm.
  • Example 2 Other conditions were the same as in Example 1, and a plant-based board was molded.
  • Comparative Example 5 In this comparative example, as a plant piece 1, a pulverized pine shoot stem core obtained by pulverizing a pine shoot stem core with a ring flaker was used. The content of lignin in the stem core of the Japanese pine was 22 wt%, and the density was 0.18 g / cm 3 .
  • the ground pine stalk core used in this comparative example had an average length of 8 mm, an average width of 2 mm, and an average thickness of 1 mm.
  • Example 2 Other conditions were the same as in Example 2, and a plant-based board was molded.
  • a kenaf stalk core strand obtained by cutting a kenaf stalk core in the length direction was used as the plant piece 1.
  • the lignin content of the kefna stalk core was 23 wt%, and the density of the kefna stalk core was 0.15 g / cm 3 .
  • an isocyanate resin adhesive for example, a wood cure manufactured by Nippon Polyurethane Industry
  • the kenaf stalk core strand used in this example had an average length of 200 mm, an average width of 12 mm, and an average thickness of 12 mm.
  • Example 4 Other conditions were the same as in Example 4, and a plant-based board was molded.
  • a jute bast fiber strand obtained by cutting jute bast fibers in the length direction was used as the plant piece 1.
  • the content of lignin in the jute bast fiber was 11 wt%, and the density of the jute bast fiber was 0.49 g / cm 3 .
  • As the adhesive 2 a phenol resin adhesive (for example, B1360 manufactured by Oshika) was used.
  • the jute bast fiber strand used in this example had an average length of 200 mm, an average width of 0.1 mm, and an average thickness of 0.1 mm.
  • the press temperature during hot pressing was 150 ° C.
  • Example 4 Other conditions were the same as in Example 4, and a plant-based board was molded.
  • the results of bending strength test and water absorption thickness expansion test according to JIS A5908 are shown below for each of the plant-based boards of Examples 1 to 4 and Comparative Examples 1 to 7.
  • the bending strength test preferably has a high strength
  • the water absorption thickness expansion coefficient test preferably has a low expansion coefficient.
  • the plant board of Example 1 has higher bending strength and lower water absorption thickness expansion rate than the plant boards of Comparative Examples 1 and 4.
  • Table 2 shows the evaluation results for the plant boards of Example 2, Comparative Example 2 and Comparative Example 5 in which the length of the plant piece 1 is 8 mm, the orientation of the plant piece 1 is random, and the layer structure is a single layer.
  • the plant-based board of Example 2 has higher bending strength and lower water absorption thickness expansion rate than Comparative Examples 2 and 5.
  • Table 3 shows the evaluation results for Example 3 and Comparative Example 3 of the plant board in which the length of the plant piece 1 is 55 mm, the orientation of the plant piece 1 is orthogonal, and the layer structure is three layers.
  • the plant board of Example 3 has higher bending strength and lower water absorption thickness expansion rate than the plant board of Comparative Example 3.
  • Table 4 shows the evaluation results for Example 4, Comparative Example 6 and Comparative Example 7 of the plant board in which the length of the plant piece 1 is 200 mm, the orientation of the plant piece 1 is orthogonal, and the layer structure is three layers.
  • the plant board of Example 4 has higher bending strength and lower water absorption thickness expansion rate than the plant boards of Comparative Examples 6 and 7.

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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)

Abstract

L'invention concerne un procédé de production de carton à base de plantes consistant à soumettre un adhésif et une pluralité de pièces végétales ayant une teneur en lignine de 15 à 20 % en poids et une densité de 0,15 à 0,20 g/cm3 à un pressage à chaud, le durcissement de l'adhésif amenant la pluralité de pièces végétales à se coller les unes aux autres.
PCT/JP2015/004997 2014-10-08 2015-10-01 Procédé de production de carton à base de plantes, et carton à base de plantes Ceased WO2016056207A1 (fr)

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JP2014207015 2014-10-08
JP2014-207015 2014-10-08

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WO2016056207A1 true WO2016056207A1 (fr) 2016-04-14

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07232309A (ja) * 1993-12-28 1995-09-05 Yamaha Corp 木質板の製法
WO1996019328A1 (fr) * 1994-12-22 1996-06-27 Tsuyoshi Kono Planche fabriquee a partir d'un vegetal liberien malvace et procede de fabrication
JP2000246709A (ja) * 1999-03-03 2000-09-12 Matsushita Electric Works Ltd 長繊維複合ボード及びその製造方法
JP2005096143A (ja) * 2003-09-22 2005-04-14 Araco Corp 木質成形体及び木質成形体の製造方法
JP2007021972A (ja) * 2005-07-20 2007-02-01 Matsushita Electric Works Ltd バインダレスボード
JP2008260238A (ja) * 2007-04-13 2008-10-30 Toyota Boshoku Corp 植物繊維成形体の製造方法
JP2011224950A (ja) * 2010-04-19 2011-11-10 Kono Shinsozai Kaihatsu Kk ボードの製造方法

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07232309A (ja) * 1993-12-28 1995-09-05 Yamaha Corp 木質板の製法
WO1996019328A1 (fr) * 1994-12-22 1996-06-27 Tsuyoshi Kono Planche fabriquee a partir d'un vegetal liberien malvace et procede de fabrication
JP2000246709A (ja) * 1999-03-03 2000-09-12 Matsushita Electric Works Ltd 長繊維複合ボード及びその製造方法
JP2005096143A (ja) * 2003-09-22 2005-04-14 Araco Corp 木質成形体及び木質成形体の製造方法
JP2007021972A (ja) * 2005-07-20 2007-02-01 Matsushita Electric Works Ltd バインダレスボード
JP2008260238A (ja) * 2007-04-13 2008-10-30 Toyota Boshoku Corp 植物繊維成形体の製造方法
JP2011224950A (ja) * 2010-04-19 2011-11-10 Kono Shinsozai Kaihatsu Kk ボードの製造方法

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