WO2018225845A1 - Plywood and production method therefor - Google Patents
Plywood and production method therefor Download PDFInfo
- Publication number
- WO2018225845A1 WO2018225845A1 PCT/JP2018/021955 JP2018021955W WO2018225845A1 WO 2018225845 A1 WO2018225845 A1 WO 2018225845A1 JP 2018021955 W JP2018021955 W JP 2018021955W WO 2018225845 A1 WO2018225845 A1 WO 2018225845A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- plywood
- thickness
- specific gravity
- veneer
- Prior art date
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000002345 surface coating layer Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000009823 thermal lamination Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920006352 transparent thermoplastic Polymers 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
-
- 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
- B32B21/13—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board all layers being exclusively wood
-
- 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
- B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
-
- 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
- B32B7/00—Layered 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
- B32B7/02—Physical, chemical or physicochemical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D3/00—Veneer presses; Press plates; Plywood presses
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/72—Density
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/732—Dimensional properties
Definitions
- the present invention relates to a plywood and a manufacturing method thereof.
- plywood has been used as a woody base material constituting a decorative material such as a decorative material for floors.
- Plywood is a thin board of wood called a single board (tanban) cut by a rotary lace, slicer, etc., and the single board is made by laminating a plurality of single boards by making the fiber directions almost perpendicular to each other.
- a wooden board is a thin board of wood cut by a rotary lace, slicer, etc.
- Plywood used for decorative materials is required to have physical properties such as impact resistance and design properties. For this reason, as a single plate constituting the plywood, a single plate having a high specific gravity with a specific gravity of 0.50 or more, such as a lauan material or a birch material having high hardness, excellent smoothness and good design properties is used.
- a plywood used for the decorative material a plywood in which only a high specific gravity single plate using such a high specific gravity single plate is laminated, or a single plate having a high specific gravity is laminated on the outermost layer, and one of the other layers is laminated.
- a plywood in which a single plate having a low specific gravity is laminated as a part or all of the other layers is used.
- An object of the present invention is to provide a plywood excellent in impact resistance and a method for manufacturing the plywood.
- the present inventors have found that, in a plywood having at least a first layer and a second layer, the first layer and the second layer are wood materials, and the thickness of the first layer is less than 1.0 mm.
- the inventors have found that the above object can be achieved by setting the specific gravity of the second layer to be higher than that of the first layer, and have completed the present invention.
- this invention relates to the manufacturing method of the following plywood and plywood.
- a plywood having at least a first layer and a second layer in order from the top, (1) The first layer and the second layer are made of wood. (2) The thickness of the first layer is less than 1.0 mm, (3) The specific gravity of the second layer is greater than the specific gravity of the first layer, (4) The specific gravity of the first layer is less than 0.50. Plywood characterized by that.
- Item 2 The plywood according to Item 1, wherein the first layer is a Chinese poplar veneer. 4). The plywood according to Item 1, wherein the first layer is a hardwood veneer. 5).
- Item 2. The plywood according to Item 1, wherein the specific gravity of the second layer is 0.50 or more. 6).
- Item 2. The plywood according to Item 1, wherein the second layer has a node on at least a part of the surface on the first layer side, and the node of the first layer is smaller than the node of the second layer. 7).
- Item 2. The plywood according to item 1, wherein the number of layers of the plywood is 5 layers or 7 layers. 8).
- Item 2. The plywood according to item 1, which is a plywood for a flooring decorative material. 9.
- Item 2. The plywood according to Item 1, wherein the thickness of the first layer is 0.6 mm or more and 0.9 mm or less. 10.
- a method for producing a plywood having at least a first layer and a second layer (I) Step 1 for laminating the first layer and the second layer, and (II) After the step 1, the surface of the first layer is polished so that the thickness of the first layer is 1.0 mm. Having step 2 of adjusting to less than (1) The first layer and the second layer are made of wood. (2) The thickness of the first layer is less than 1.0 mm, (3) The specific gravity of the second layer is greater than the specific gravity of the first layer, (4) The specific gravity of the first layer is less than 0.50.
- the manufacturing method of the plywood characterized by this. 11.
- a method for producing a plywood having a first layer and a second layer in order from at least the top (I) A step of preparing a poplar single plate having an air-dry specific gravity of 0.40 to 0.47 as the first layer and a eucalyptus single plate having an air-dry specific gravity of 0.50 to 0.90 as the second layer. 1, (II) Step 2 of laminating the first layer and the second layer, and (III) After the step 2, the step of polishing the surface of the first layer to adjust the thickness of the first layer to less than 1.0 mm, The manufacturing method of the plywood characterized by this.
- the plywood of the present invention is excellent in impact resistance. Moreover, the manufacturing method of the plywood of this invention can manufacture the plywood excellent in impact resistance.
- (A) is a diagram in which a plywood is cut out to a certain size
- (b) is a diagram in which a layer laminated on the layer to be measured is scraped in the thickness direction from the surface, and all are removed
- (c) is a measurement. It is the figure which made thickness of the layer which is object thin. It is a 2nd page figure which shows an example of the decorative material using the plywood of this invention.
- the plywood of the present invention and the manufacturing method of the plywood will be described in detail.
- the surface on the first layer side of the plywood is a so-called “front surface”, which is the surface on the side laminated with the design layer. Therefore, in this specification, the direction of the surface on the first layer side of the plywood is referred to as “up”, and the opposite side is referred to as “back” or “down”.
- the plywood of the present invention is a plywood having at least a first layer and a second layer in order from the top, (1) the first layer and the second layer are wood materials, and (2) the first layer.
- the thickness of is less than 1.0 mm, (3) the specific gravity of the second layer is greater than the specific gravity of the first layer, and (4) the specific gravity of the first layer is less than 0.50. To do.
- the plywood according to the present invention having the above-described features can suppress the amount of dents as a plywood by finally receiving the impact applied to the first layer even when the impact is applied from the first layer side. For this reason, the plywood of this invention can show the outstanding impact resistance.
- plywood means a single board (tanban) cut by a rotary lace, a slicer, etc., and the plurality of single boards are bonded by making the fiber directions of the single boards substantially perpendicular to each other.
- the single plate is laminated so that three or more odd-numbered sheets are orthogonal to each other.
- specific gravity in the present specification is a value measured by the following measuring method. That is, the plywood is cut out to a certain size, for example, 10 ⁇ 10 cm (FIG. 4A). The surface area of the plywood at this time is defined as S (cm 2 ). In the case of the above-mentioned 10 ⁇ 10 cm, S is 100 cm 2 . The cut plywood is left to dry in a dryer at a temperature of 103 ⁇ 2 ° C. for 72 hours. Next, when the layer to be measured for measuring the specific gravity is located on the outermost layer (for example, the first layer), the weight m0 (g) and the thickness h0 (cm) of the plywood after drying are measured.
- the layer to be measured for measuring the specific gravity is located on the outermost layer (for example, the first layer), the weight m0 (g) and the thickness h0 (cm) of the plywood after drying are measured.
- the layer to be measured (first layer) is shaved from the surface in the thickness direction to remove a part of the layer to be measured, thereby reducing the thickness of the layer to be measured (FIG. 4B).
- the weight m1 (g) and thickness h1 (cm) of the plywood after removing a part of the layer to be measured are measured. From the measured value, the specific gravity G of the layer to be measured is measured based on the following formula.
- G [m0 (g) ⁇ m1 (g)] / [(h0 (cm) ⁇ h1 (cm)) ⁇ S (cm 2 )] (Formula)
- the unit is g / cm 3 , but the unit is omitted and the specific gravity is used.
- the layer to be measured is not located on the outermost layer of the plywood (for example, the second layer 22 in FIG. 5A)
- the layer for example, the first layer stacked on the outermost layer side of the layer to be measured 1 layer
- the layer to be measured is defined as the outermost layer (FIG. 5 (b))
- a part of the layer to be measured is removed by the measurement method described above and measured.
- the specific gravity may be measured by reducing the thickness of the target layer (FIG. 5C).
- the specific gravity is basically measured at the part excluding the nodes.
- the type of tree is not limited as long as the first layer is smaller than the specific gravity of the second layer and the specific gravity is less than 0.50.
- the first layer is preferably a hardwood veneer.
- Specific examples of the first layer include poplar veneers and falkata veneers that are fast-growing trees.
- a poplar single plate is more preferable because it has a relatively high specific gravity among low specific gravity, excellent surface smoothness, and few nodes.
- a poplar single plate using Chinese poplar can be preferably used as the poplar single plate.
- poplar means the American willow tree represented by the willow family, the American black willow, the European black willow, etc., and those breeding species and interspecific hybrids are also included. Also included are American whitewoods called yellow poplars of magnolia family.
- Choinese poplar is often referred to as Italian poplar or warm temperate poplar, and means an early-population poplar that has been bred and grown in China.
- the specific gravity of the first layer is not particularly limited as long as it is smaller than the specific gravity of the second layer described below and less than 0.50.
- Preferred lower limit values of the specific gravity of the first layer include more than 0.40, 0.42 or more, and 0.45 or more, and preferred upper limit values include 0.48 or less and 0.47 or less.
- preferred upper limit values include 0.48 or less and 0.47 or less.
- 0.42 or more and 0.47 or less are especially preferable. Due to the specific gravity within the above-mentioned range, the plywood of the present invention exhibits even more excellent impact resistance.
- the thickness of the first layer is less than 1.0 mm.
- the thickness of the first layer is preferably 0.9 mm or less, and more preferably 0.8 mm or less.
- the thickness of the first layer is preferably 0.3 mm or more, more preferably 0.5 mm or more, still more preferably 0.6 mm or more, and may occur due to the difference in shrinkage between the first layer and the second layer. In order to avoid the characteristic crack, 0.7 mm or more is particularly preferable.
- the thickness of the first layer is within the above range, it is further suppressed that minor irregularities such as nodes, grain, cracks, and chips of the second layer are visually recognized from the surface of the plywood.
- a range of the thickness of a 1st layer 0.6 mm or more and 0.9 mm or less are especially preferable.
- the first layer preferably has no noticeable nodes on the surface, and more preferably has no nodes.
- the smoothness of the surface of the plywood according to the present invention is further improved by making the nodes on the surface of the first layer inconspicuous or having no nodes. Further, even if the first layer has a node on the surface, it is preferable that the first layer has fewer nodes than the second layer.
- a 2nd layer if the specific gravity is larger than the specific gravity of a 1st layer, the kind of the tree will not be limited.
- a eucalyptus veneer is preferable in that it has a relatively high specific gravity.
- the specific gravity of the second layer is greater than the specific gravity of the first layer.
- the specific gravity of the second layer is preferably 0.50 or more, and more preferably 0.55 or more.
- 0.90 or less is preferable, 0.75 or less is more preferable, 0.65 or less is further more preferable, and also less than 0.60 is especially preferable. Due to the specific gravity within the above-mentioned range, the plywood of the present invention exhibits even more excellent impact resistance and excellent machinability during processing.
- 0.55 or more and less than 0.60 are especially preferable.
- the thickness of the second layer is not particularly limited, but is preferably 1.0 mm or more, and more preferably 1.3 mm or more. When the lower limit of the thickness of the second layer is within the above range, the plywood of the present invention exhibits even more excellent impact resistance.
- the second layer may have a node on at least a part of the surface. Since the plywood of the present invention has the first layer, even when the second layer has a node on at least a part of the surface, the node can be prevented from being visually recognized from the surface of the plywood. .
- the layer structure of the plywood of the present invention is not particularly limited as long as it has at least a first layer and a second layer, and some single plates, which are thin plates obtained by thinly cutting a plywood log, are bonded together.
- the single plate is bonded so that odd-numbered sheets are orthogonal to each other.
- the plywood of the present invention may have a layer structure having another woody layer as long as it has at least a first layer and a second layer in order from the top.
- the first layer is the outermost surface
- the second layer is laminated under the first layer
- another wood layer is laminated under the first layer to form an odd number of wood layers.
- the layer structure which has is mentioned.
- a plywood having a first layer 11 / second layer 12 / third layer 13 / fourth layer 14 / fifth layer 15 in order from the top like the plywood 1 in FIG.
- the number of wood layers of plywood is not limited to 5 or 7 layers, and may be any number, but 3 to 9 layers are preferable, and 5 to 7 layers are more preferable.
- the number of the wood layers of the said plywood is an odd number at the point which can suppress further the curvature of a plywood.
- the total thickness of the plywood is not particularly limited, and is preferably 5.0 mm or more and 30.0 mm or less, and more preferably 5.5 mm or more as a lower limit, considering the ease of construction when used as an interior material. 5 mm or more and 9.0 mm or more are particularly preferable. Moreover, as an upper limit, 15.5 mm or less is more preferable, and 12.5 mm or less is still more preferable.
- the thickness is particularly preferably 9.0 mm or more and 12.5 mm or less. In this case, the number of the wood layers is preferably 5 to 7, and more preferably 7 layers. In the case of a thickness of about 15 mm, 9 layers are particularly preferable.
- the thickness of a general wood flooring material such as a flooring material in a living room or a corridor is usually about 8 mm, about 12 mm, about 15 mm, or the like.
- the total layer thickness including the design layer is generally about 8 mm, about 12 mm, and about 15 mm.
- the same type of wood veneer is used as the first layer 11 on the front surface called “face” and the fifth layer 15 on the back surface called “back”.
- the same type of wood veneer may be used, or the third layer 13 may be made of the same type of wood veneer as the first layer 11 and the fifth layer 15. Also good.
- the second layer 12 and the fourth layer 14 use the same type of wood veneer. Examples of the specific layer structure of the plywood in FIG.
- a layer structure including a poplar veneer / eucalyptus veneer / poplar veneer / eucalyptus veneer / poplar veneer examples include a layer structure having a eucalyptus veneer / eucalyptus veneer / eucalyptus veneer / poplar veneer.
- the same type of single veneer is used as the first layer 21 on the front surface called the face and the seventh layer 27 on the back surface called the back.
- the same type of trees may be used as the second layer 22 to the sixth layer 26, but the same type of trees as the first layer 21, the third layer 23, the fifth layer 25, and the seventh layer 27. It is preferable to use a single plate.
- the second layer 22, the fourth layer 24, and the sixth layer 26 use the same type of tree veneer.
- Composition layer structure with poplar veneer / eucalyptus veneer / eucalyptus veneer / eucalyptus veneer / eucalyptus veneer / poplar veneer, poplar veneer / eucalyptus veneer / eucalyptus veneer / poplar veneer
- poplar veneer / eucalyptus veneer / eucalyptus veneer / poplar veneer For example, a layer structure having a / eucalyptus veneer / eucalyptus veneer / poplar veneer.
- the plywood of the present invention can be used as a decorative material by laminating with a design layer.
- the design layer is not particularly limited as long as design properties can be imparted to the decorative material, and examples thereof include a decorative sheet made of a veneer sliced from natural wood, a synthetic resin, or the like. Since the plywood of the present invention has the above-described configuration, it has excellent impact resistance. For this reason, when the plywood of the present invention is laminated with a design layer to make a decorative material, for example, it is not necessary to use a design layer having a thickness of 1 mm or more, and due to a difference in linear expansion coefficient between the design layer and the plywood, etc. The generated warpage is suppressed. From the above, the plywood of the present invention can be suitably used as a plywood for a flooring decorative material by laminating with a design layer.
- the method for producing the decorative material is not particularly limited, and it can be produced by a conventionally known method.
- stacking a design layer on the 1st layer of a plywood is mentioned, for example.
- the method of laminating the design layer on the first layer of the plywood is not particularly limited, and examples thereof include direct printing and transfer, and a method of laminating these layers via an adhesive layer.
- the adhesive that forms the adhesive layer include polyvinyl acetate, polyvinyl chloride, vinyl chloride / vinyl acetate copolymer, urethane, acrylic, urethane / acrylic, urethane / acrylic copolymer, and ethylene / acrylic acid copolymer.
- Examples thereof include water-soluble emulsion systems, solvent systems, and reactive hot melt adhesives exemplified by PUR, which contain polymers, ionomers, butadiene / acrylonitrile rubbers, neoprene rubbers, natural rubbers and the like as active ingredients.
- a water-soluble emulsion adhesive and a reactive hot-melt adhesive are preferable from the viewpoint of workability, and a reactive hot-melt adhesive is more preferable from the viewpoint of excellent appearance after the lamination process.
- the curing method for the adhesive include one-component curing, two-component curing, heat curing, moisture curing, and ionizing radiation curing such as electron beam and ultraviolet light.
- the thickness of the adhesive layer is not limited, but is preferably about 0.1 to 50 ⁇ m.
- the decorative material is a decorative material having a design layer on the first layer of the plywood having the first layer and the second layer in order from the top, (1)
- the first layer and the second layer are made of wood.
- the thickness of the first layer is less than 1.0 mm, (3)
- the second layer may have a specific gravity greater than that of the first layer.
- the plywood of the present invention described above can be used as the plywood.
- the decorative material has a design layer on the first layer of the plywood. That is, in the decorative material, the design layer is laminated on the surface of the first layer opposite to the side on which the second layer is laminated.
- FIG. 6 shows an example of the cosmetic material.
- FIG. 6 is a two-side view illustrating an example of a decorative material.
- the decorative material shown in FIG. 6 is formed by laminating the design layer 5 on the first layer 21 of the plywood 2.
- the decorative material shown in FIG. 6 is made of sane (actual) processing on the plywood, and is a male sap A that is a convex portion protruding toward the upper side of the paper surface, and a concave portion formed on the lower side of the paper surface. It has a certain female sa Amsterdam B.
- the cosmetic material shown in FIG. 6 is capable of being assembled by applying the sane process to the male sane A and the female sane B, and is more suitable as a decorative material for floors. Can be used.
- the design layer is not particularly limited as long as design properties can be imparted to the plywood of the present invention.
- a resin-impregnated paper impregnated with thermosetting resin such as a veneer sliced from natural wood; a melamine decorative board And a decorative sheet made of synthetic resin or the like.
- a pattern may be provided on the surface of the plywood by coloring or printing, or a design may be formed by transfer.
- the veneer is a rare natural plate having a beautiful grain that is obtained by thinly slicing wood such as oak or birch into a thickness of about 0.2 mm to 0.6 mm.
- the surface protective layer mentioned later can be apply
- thermosetting resin used for the resin decorative board conventionally known thermosetting resins can be widely used.
- thermosetting resin include melamine resin, unsaturated polyester resin, phenol resin, diallyl phthalate resin, and the like.
- a resin decorative board obtained by impregnating the above thermosetting resin into a sheet-like fibrous base material such as permeable paper, synthetic paper, and nonwoven fabric as impregnated paper is used.
- One obtained by stacking layers and molding at high temperature and high pressure can be mentioned.
- the total thickness of the design layer is preferably 0.10 mm or more, more preferably 0.25 mm or more, and further preferably 0.30 mm or more.
- the total thickness of the design layer is preferably 1.0 mm or less, more preferably 0.7 mm or less, still more preferably 0.6 mm or less, and particularly preferably 0.45 mm or less.
- the upper limit of the total thickness of the design layer is within the above range, warping of the decorative material can be further suppressed.
- 0.25 mm or more and 0.45 mm or less are particularly preferable.
- the impact resistance of the decorative material can be further improved, and the weather resistance and water resistance are excellent.
- the configuration of the decorative sheet will be specifically described.
- the configuration of the decorative sheet is not particularly limited.
- a decorative sheet having a base sheet, a pattern layer (solid ink layer / pattern ink layer), a transparent adhesive layer, a transparent resin layer, and a surface protective layer is preferable.
- seat a pattern layer (solid ink layer / pattern ink layer), a transparent adhesive layer, a transparent resin layer, and a surface protective layer in order on the synthetic resin backer layer mentioned later is also preferable.
- a substrate sheet, a pattern layer (solid ink layer / pattern ink layer), and a surface protective layer in this order can also be used.
- this design layer will be described as an example.
- the synthetic resin backer layer is laminated so as to be positioned on the back side of the design layer, and is made of a synthetic resin that alleviates the influence of surface irregularities such as a wooden substrate and imparts impact resistance to the design layer itself. It is a layer and constitutes a part of the design layer.
- the base sheet is 1) paper such as thin paper, fine paper, kraft paper, Japanese paper, titanium paper, resin-impregnated paper, inter-paper reinforced paper, etc. 2) wood fiber, glass fiber, asbestos, polyester fiber, vinylon fiber, rayon Examples thereof include one or two or more laminates of woven or non-woven fabric made of fibers and the like, and 3) sheets of synthetic resin such as polyolefin, polyester, polyacryl, polyamide, polyurethane, and polystyrene. Among these, the synthetic resin sheet of 3) is preferable.
- the thickness of the base sheet is preferably about 20 to 300 ⁇ m.
- the substrate sheet may be colored as necessary. Further, the surface may be subjected to surface treatment such as corona discharge treatment, plasma treatment, ozone treatment or the like, or a primer which is a base coating for improving the adhesion with an adjacent layer may be applied.
- the pattern layer is composed of a pattern ink layer and / or a solid ink layer.
- the pattern layer can be formed by a printing method such as gravure printing, offset printing or silk screen printing. Examples of the pattern of the pattern ink layer include a wood grain pattern, a stone pattern, a cloth pattern, a skin pattern, a geometric pattern, characters, symbols, line drawings, various abstract patterns, and the like.
- the solid ink layer is obtained by solid printing of colored ink.
- the pattern layer is composed of one or both of a pattern ink layer and a solid ink layer.
- chlorinated polyolefin such as chlorinated polyethylene and chlorinated polypropylene
- polyester polyurethane composed of isocyanate and polyol
- polyacryl polyvinyl acetate, polyvinyl chloride, and vinyl chloride-vinyl acetate
- a polymer, a cellulose-based resin, a polyamide-based resin, or the like may be used alone or in combination, and a pigment, a solvent, various auxiliary agents, and the like may be added thereto to make an ink.
- polyester polyurethane composed of isocyanate and polyol, polyacryl, polyamide-based resin, and the like is preferable.
- the transparent adhesive layer is provided between the picture layer and the transparent resin layer as necessary.
- the transparent adhesive layer can be obtained, for example, by applying and drying a known dry lamination adhesive such as a two-component curable urethane resin.
- the thickness of the transparent adhesive layer after drying is preferably about 0.1 to 30 ⁇ m, more preferably about 1 to 5 ⁇ m.
- a transparent resin layer will not be specifically limited if it is a transparent resin layer, For example, it can form suitably with a transparent thermoplastic resin.
- Synthetic resins such as polymers, ionomers, acrylic acid esters, and methacrylic acid esters are exemplified.
- polyolefin resins such as polypropylene are preferable.
- the transparent resin layer may be colored.
- a colorant may be added to the thermoplastic resin.
- pigments or dyes used in the picture layer can be used.
- fillers for the transparent resin layer, fillers, matting agents, foaming agents, flame retardants, lubricants, antistatic agents, antioxidants, UV absorbers, light stabilizers, radical scavengers, soft components (eg rubber)
- Various additives such as may be included.
- the surface protective layer (transparent surface protective layer) is provided for imparting surface physical properties such as scratch resistance, abrasion resistance, water resistance, and stain resistance required for the design layer.
- the resin forming the surface protective layer preferably includes at least one curable resin such as a thermosetting resin or an ionizing radiation curable resin.
- ionizing radiation curable resins are preferable from the viewpoint of high surface hardness, productivity, and the like.
- an electron beam curable resin is most preferable.
- thermosetting resins include unsaturated polyester resins, polyurethane resins (including two-component curable polyurethane), epoxy resins, amino alkyd resins, phenol resins, urea resins, diallyl phthalate resins, melamine resins, guanamine resins, and melamines.
- unsaturated polyester resins polyurethane resins (including two-component curable polyurethane)
- epoxy resins include epoxy resins, amino alkyd resins, phenol resins, urea resins, diallyl phthalate resins, melamine resins, guanamine resins, and melamines.
- -Urea cocondensation resin silicon resin, polysiloxane resin and the like.
- a curing agent such as a crosslinking agent and a polymerization initiator and a polymerization accelerator can be added to the resin.
- curing agents isocyanates, organic sulfonates, etc. can be added to unsaturated polyester resins, polyurethane resins, etc., organic amines, etc. can be added to epoxy resins, peroxides such as methyl ethyl ketone peroxide, azoisobutyl nitrile, etc.
- a radical initiator can be added to the unsaturated polyester resin.
- Examples of the method for forming the surface protective layer with a thermosetting resin include a method in which a solution of a thermosetting resin is applied by a coating method such as a roll coating method or a gravure coating method and then dried and cured.
- the coating amount of the solution is about 5 to 50 ⁇ m, preferably about 5 to 40 ⁇ m in terms of solid content.
- the ionizing radiation curable resin is not limited as long as it is a resin that undergoes a crosslinking polymerization reaction upon irradiation with ionizing radiation and changes to a three-dimensional polymer structure.
- one or more prepolymers, oligomers and monomers having a polymerizable unsaturated bond or epoxy group that can be crosslinked by irradiation with ionizing radiation in the molecule can be used.
- examples thereof include acrylate resins such as urethane acrylate, polyester acrylate, and epoxy acrylate; silicon resins such as siloxane; polyester resins; epoxy resins and the like.
- Examples of the ionizing radiation include ultraviolet rays (near ultraviolet rays, vacuum ultraviolet rays, etc.), X-rays, electron beams, ion beams, etc. Among them, ultraviolet rays and electron beams are preferable, and electron beams are more preferable.
- an ultra-high pressure mercury lamp As the ultraviolet light source, an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc lamp, a black light fluorescent lamp, or a metal halide lamp can be used.
- the wavelength of ultraviolet light is about 190 to 380 nm.
- the electron beam source for example, various electron beam accelerators such as a cockcroft-wald type, a bandegraft type, a resonant transformer type, an insulating core transformer type, a linear type, a dynamitron type, and a high frequency type can be used.
- the energy of the electron beam is preferably about 100 to 1000 keV, more preferably about 100 to 300 keV.
- the irradiation amount of the electron beam is preferably about 2 to 15 Mrad.
- the ionizing radiation curable resin is sufficiently cured when irradiated with an electron beam, but it is preferable to add a photopolymerization initiator (sensitizer) when cured by irradiation with ultraviolet rays.
- a photopolymerization initiator sensitizer
- Photopolymerization initiators in the case of resin systems having radically polymerizable unsaturated groups include, for example, acetophenones, benzophenones, thioxanthones, benzoin, benzoin methyl ether, Michler benzoylbenzoate, Michler ketone, diphenyl sulfide, dibenzyl disulfide , Diethyl oxide, triphenylbiimidazole, isopropyl-N, N-dimethylaminobenzoate and the like can be used.
- a resin system having a cationic polymerizable functional group for example, at least one kind such as an aromatic diazonium salt, an aromatic sulfonium salt, a metallocene compound, a benzoin sulfonic acid ester, and a freeloxysulfoxonium diallyl iodosyl salt.
- an aromatic diazonium salt an aromatic sulfonium salt, a metallocene compound, a benzoin sulfonic acid ester, and a freeloxysulfoxonium diallyl iodosyl salt.
- the addition amount of the photopolymerization initiator is not particularly limited, but is generally about 0.1 to 10 parts by mass with respect to 100 parts by mass of the ionizing radiation curable resin.
- a solution of an ionizing radiation curable resin may be applied by a coating method such as a gravure coating method or a roll coating method.
- the coating amount of the solution is about 5 to 50 ⁇ m, preferably about 5 to 40 ⁇ m, as a solid content.
- an inorganic filler may be blended.
- inorganic fillers include powdered aluminum oxide, silicon carbide, silicon dioxide, calcium titanate, barium titanate, magnesium pyroborate, zinc oxide, silicon nitride, zirconium oxide, chromium oxide, iron oxide, boron nitride, Examples include diamond, gold sand and glass fiber.
- the amount of the inorganic filler added is about 1 to 80 parts by mass with respect to 100 parts by mass of the ionizing radiation curable resin.
- the decorative sheet preferably has a synthetic resin backer layer on the lowermost layer of the decorative sheet, that is, on the plywood side of the design layer.
- the synthetic resin backer layer By having the synthetic resin backer layer, the impact resistance of the decorative material is further improved.
- Examples of the resin constituting the synthetic resin backer layer include polypropylene, ethylene-vinyl alcohol copolymer, polyethylene, polymethylpentene, polyethylene terephthalate, polyalkylene terephthalate having high heat resistance [for example, a part of ethylene glycol is 1 Polyethylene terephthalate substituted with 1,4-cyclohexanedimethanol, diethylene glycol, etc., so-called trade name PET-G (manufactured by Eastman Chemical Company)], polybutylene terephthalate, polyethylene naphthalate, polyethylene naphthalate-isophthalate copolymer, Amorphous polyester (A-PET), polycarbonate, polyarylate, polyimide, polystyrene, polyamide, ABS and the like can be mentioned. These resins can be used alone or in combination of two or more.
- the thickness of the synthetic resin backer layer is preferably 0.10 to 0.60 mm, the lower limit is more preferably 0.13 or more and 0.15 or more, and the upper limit is 0.45 or less, 0.30 or less. 0.25 or less and 0.20 or less are more preferable.
- the lower limit of the thickness of the synthetic resin backer layer is within the above range, the impact resistance of the decorative material is further improved.
- the curvature of a decorative material is further suppressed because the upper limit of the thickness of the synthetic resin backer layer is in the above range. Note that 0.13 to 0.25 is a particularly preferable range.
- Lamination of each layer is performed by, for example, forming a pattern layer (solid ink layer, pattern ink layer) on one surface of the base sheet by printing and then laminating a transparent resin on the pattern layer by a T-die extrusion method or the like, or A transparent resin layer is laminated by a dry lamination method via a known dry lamination adhesive such as a two-component curable urethane resin, a surface protective layer is formed to produce a design layer intermediate, and T-die extrusion It can carry out by the method of laminating
- An uneven pattern may be formed on the decorative sheet by embossing from the transparent resin layer side or the surface protective layer side.
- the concavo-convex pattern can be formed by heating press, hairline processing or the like.
- Examples of the uneven pattern include a conduit groove, a stone plate surface unevenness, a cloth surface texture, a satin finish, a grain, a hairline, and a line groove.
- the decorative sheet has the above-described configuration, when it is laminated on the plywood of the present invention and used as a decorative material, it has excellent impact resistance, and warpage and plywood cracking are suppressed. For this reason, the said decorative material can be used suitably as a decorative material for floors.
- the manufacturing method of plywood of the present invention is a manufacturing method of plywood having at least a first layer and a second layer in order from the top, (I) Step 1 for laminating the first layer and the second layer, and (II) After the step 1, the surface of the first layer is polished so that the thickness of the first layer is 1.0 mm. Having step 2 of adjusting to less than (1) The first layer and the second layer are made of wood. (2) The thickness of the first layer is less than 1.0 mm, (3) The specific gravity of the second layer is greater than the specific gravity of the first layer, (4) In the manufacturing method, the specific gravity of the first layer is less than 0.50. This manufacturing method is referred to as manufacturing method 1.
- Step 1 is a step of laminating the first layer and the second layer. About the said 1st layer, the said 2nd layer, those thickness, and specific gravity, it is the same as the content demonstrated in the above-mentioned plywood.
- the method for laminating the first layer and the second layer is not particularly limited, and an adhesive is applied and laminated between the first layer and the second layer, and a press machine such as a multistage hot press machine is used. Then, lamination may be performed by hot pressing for about 3 to 7 minutes under conditions of a pressure of about 0.69 to 1.18 MPa and a temperature of about 100 to 130 ° C.
- the plywood When the plywood has the first layer, the second layer, and the other wood layers as shown in FIGS. 1 and 2, the plywood is laminated by applying an adhesive between the layers, and is laminated by the above hot press. That's fine.
- the adhesive used between the layers is not shown in FIGS. 1 and 2 and is omitted. Further, the adhesive layer formed by the adhesive is not included in the first to seventh layers forming the plywood of the present invention described above.
- the adhesive is not particularly limited, and known woodworking adhesives can be widely used.
- adhesives include, for example, polyvinyl acetate, polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ionomer, butadiene-acrylonitrile rubber, neoprene rubber, natural rubber and the like as active ingredients.
- thermosetting adhesives include melamine-based, phenol-based, urea-based (such as vinyl acetate-urea) adhesives.
- the first layer, the second layer, and the other wood layer are laminated.
- Step 2 is a step of polishing the surface of the first layer after Step 1 and adjusting the thickness of the first layer to less than 1.0 mm. By laminating the first layer and the second layer in step 1 and then polishing the surface of the first layer in step 2, the thickness of the first layer can be made uniform.
- the polishing method for polishing the surface of the first layer is not particularly limited, and polishing can be performed using a sanding belt, a planar, a buff, a brush, or the like.
- a polishing method using a sanding belt is preferable in that the surface of the first layer after polishing can be smoothed.
- the thickness of the first layer after polishing may be less than 1.0 mm, and the thickness of the first layer before polishing may be 1.0 mm or more.
- the thickness of the first layer before polishing is not particularly limited, and is preferably about 0.8 to 1.3 mm.
- the surface of the first layer may be polished, and the wood layer on the surface opposite to the surface on which the first layer of the produced plywood is laminated may also be polished to adjust the thickness.
- the surface of the first layer 11 is polished and the surface of the fifth layer 15 is also polished. May be.
- the surface of the first layer 21 is polished and the entire surface of the seventh layer 27 is polished. You may grind
- the thickness of the first layer is adjusted to less than 1.0 mm.
- the method for producing a plywood of the present invention is also a method for producing a plywood having at least a first layer and a second layer in order from the top, (I) A step of preparing a poplar single plate having an air-dry specific gravity of 0.40 to 0.47 as the first layer and a eucalyptus single plate having an air-dry specific gravity of 0.50 to 0.90 as the second layer. 1, (II) Step 2 of laminating the first layer and the second layer, and (III) A method for manufacturing a plywood having a step 3 of adjusting the thickness of the first layer to less than 1.0 mm by polishing the surface of the first layer after the step 2. This manufacturing method is referred to as manufacturing method 2.
- Step 1 in production method 2 prepares a poplar veneer with an air-dry specific gravity of 0.40 or more and 0.47 or less as the first layer, and a eucalyptus veneer with an air-dry specific gravity of 0.50 or more and 0.90 or less as the second layer. It is a process to do.
- the 1st layer and 2nd layer whose air-dry specific gravity is the said range are prepared, and it uses for the process 2 demonstrated below.
- Steps 2 and 3 in manufacturing method 2 are the same as steps 1 and 2 in manufacturing method 1 described above, except that the first layer and the second layer having an air-dry specific gravity within the above range prepared in step 1 are used. It is.
- a poplar veneer having an air-dry specific gravity of 0.40 or more and 0.47 or less is used for the first layer, and a eucalyptus veneer having an air-dry specific gravity of 0.50 or more and 0.90 or less is used for the second layer.
- a plywood having excellent impact resistance can be produced.
- the air-dry specific gravity means a specific gravity calculated by dividing the weight of wood in the air-dried state by its volume, and the air-dried state has a moisture content of 15%. The state of the wood at the time.
- Example 1 (Production of plywood)
- a poplar single plate having a thickness of 1.3 mm and a specific gravity of 0.43 was prepared by slicing poplar.
- a eucalyptus veneer having a thickness of 2.7 mm and a specific gravity of 0.55 was prepared by slicing eucalyptus.
- poplar single plates similar to the first layer were prepared as the third layer, fifth layer, and seventh layer, and eucalyptus single plates similar to the second layer were prepared as the fourth layer and sixth layer.
- Poplar veneer / eucalyptus veneer in order from the top to the seventh layer from the first layer through the urea adhesive so that the grain direction of the adjacent wood layer is orthogonal to the prepared poplar veneer and eucalyptus veneer
- a laminate of wood layers was prepared so as to have a layer structure of: / poplar single plate / eucalyptus single plate / poplar single plate / eucalyptus single plate / poplar single plate.
- the laminate of the above wood layers was hot-pressed for 5 minutes under the conditions of a pressure of 0.78 MPa and a temperature of 110 ° C. using a multistage hot press machine, and the layers were bonded together.
- the thickness of the poplar single plate was 1.2 mm
- the thickness of the eucalyptus single plate was 2.5 mm
- the total thickness of the laminate was 12.3 mm.
- the first layer and the seventh layer were sanded and polished so that the thickness of the first layer was 0.9 mm and the total thickness of the plywood was 11.5 mm. That is, each thickness from the first layer to the sixth layer is 0.9 mm / 2.5 mm / 1.2 mm / 2.5 mm / 1.2 mm / 2.5 mm, and by sanding polishing the seventh layer The thickness was adjusted to produce a plywood having a total thickness of 11.5 mm.
- Example 2 The types and thicknesses of the trees of the first layer and the second layer were as shown in Table 1, and the same single plate as in Example 1 was laminated as the third layer to the seventh layer. That is, the layers from the first layer to the seventh layer were laminated using the same manufacturing method as in Example 1 above, and the thickness was adjusted, so that the poplar single plate 0.8 mm / eucalyptus single plate 2.5 mm / Poplar veneer 1.2mm / eucalyptus veneer 2.5mm / poplar veneer 1.2mm / eucalyptus veneer 2.5mm, plywood The total thickness was 11.5 mm. Other than that was carried out similarly to Example 1, and produced the plywood.
- Example 3 The types and thicknesses of the trees of the first layer and the second layer were as shown in Table 1, and the same single plate as in Example 1 was laminated as the third layer to the seventh layer. That is, each layer from the first layer to the seventh layer is laminated using the same manufacturing method as in Example 1 above, and the thickness is adjusted, so that the poplar single plate 0.6 mm / eucalyptus single plate 2.5 mm / Poplar veneer 1.2mm / eucalyptus veneer 2.5mm / poplar veneer 1.2mm / eucalyptus veneer 2.5mm, plywood The total thickness was 11.5 mm. Other than that was carried out similarly to Example 1, and produced the plywood.
- Example 4 (Production of plywood)
- a poplar single plate having a thickness of 1.4 mm and a specific gravity of 0.43 was prepared by slicing poplar.
- a eucalyptus veneer having a thickness of 2.7 mm and a specific gravity of 0.55 was prepared by slicing eucalyptus.
- poplar single plates similar to the first layer were prepared as the third layer, fifth layer, and seventh layer, and eucalyptus single plates similar to the second layer were prepared as the fourth layer and sixth layer.
- Poplar veneer / eucalyptus veneer in order from the top to the seventh layer from the first layer through the urea adhesive so that the grain direction of the adjacent wood layer is orthogonal to the prepared poplar veneer and eucalyptus veneer
- a laminate of wood layers was prepared so as to have a layer structure of: / poplar single plate / eucalyptus single plate / poplar single plate / eucalyptus single plate / poplar single plate.
- the laminate of the above wood layers was hot-pressed for 5 minutes under the conditions of a pressure of 0.78 MPa and a temperature of 110 ° C. using a multistage hot press machine, and the layers were bonded together.
- the thickness of the poplar single plate was 1.3 mm
- the thickness of the eucalyptus single plate was 2.5 mm
- the total thickness of the laminate was 12.7 mm.
- Table 1 shows the tree types and thicknesses of the first and second layers. That is, each layer from the first layer to the seventh layer is made of poplar single plate 0.3 mm / eucalyptus single plate 2.5 mm / poplar single plate 1.3 mm / eucalyptus single plate 2.5 mm / poplar single plate 1.3 mm. / The Eucalyptus veneer was 2.5 mm, and the thickness was adjusted by sanding polishing the poplar veneer as the seventh layer, so that the total thickness of the plywood was 11.5 mm. Other than that was carried out similarly to Example 1, and produced the plywood.
- Example 5 (Production of plywood) As a first layer, a poplar single plate having a thickness of 3.5 mm and a specific gravity of 0.43 was prepared by slicing poplar. Moreover, the eucalyptus single board of thickness 3.5mm and specific gravity 0.55 was prepared by slicing eucalyptus as a 2nd layer. Further, poplar single plates similar to the first layer were prepared as the third layer and the fifth layer, and eucalyptus single plates similar to the second layer were prepared as the fourth layer.
- Poplar veneer / eucalyptus veneer in order from the top to the 5th layer from the 1st layer through the urea adhesive so that the grain direction of the adjacent wood layer is orthogonal to the prepared poplar veneer and eucalyptus veneer
- a laminate of wood layers was prepared by laminating so as to have a layer structure of / poplar single plate / eucalyptus single plate / poplar single plate.
- the laminate of the above wood layers was hot-pressed for 5 minutes under the conditions of a pressure of 0.78 MPa and a temperature of 110 ° C. using a multistage hot press machine, and the layers were bonded together.
- the thickness of the poplar single plate was 3.2 mm
- the thickness of the eucalyptus single plate was 3.2 mm
- the total thickness of the laminate was 16.0 mm.
- each layer from the first layer to the fifth layer is made of poplar veneer 0.9 mm / eucalyptus veneer 3.2 mm / poplar veneer 3.2 mm / eucalyptus veneer 3.2 mm as the fifth layer.
- the thickness was adjusted by sanding polishing the poplar single plate, so that the total thickness of the plywood was 11.5 mm. Other than that was carried out similarly to Example 1, and produced the plywood.
- Example 6 The types and thicknesses of the trees of the first layer and the second layer were as shown in Table 1, and the same single plate as in Example 1 was laminated as the third layer to the seventh layer. That is, the layers from the first layer to the seventh layer were laminated using the same manufacturing method as in Example 1 above, and the thickness was adjusted, so that Falkata single plate 0.6 mm / eucalyptus single plate 2.5 mm / Poplar veneer 1.2mm / eucalyptus veneer 2.5mm / poplar veneer 1.2mm / eucalyptus veneer 2.5mm, plywood The total thickness was 11.5 mm. Other than that was carried out similarly to Example 1, and produced the plywood.
- Example 7 (Production of plywood)
- a poplar single plate having a thickness of 1.3 mm and a specific gravity of 0.43 was prepared by slicing poplar.
- eucalyptus single plates having a thickness of 2.2 mm and a specific gravity of 0.55 were prepared by slicing eucalyptus.
- a poplar veneer similar to the first layer was prepared as the seventh layer, and eucalyptus veneers similar to the second layer were prepared as the third to sixth layers.
- Poplar veneer / eucalyptus veneer in order from the top to the seventh layer from the first layer through the urea adhesive so that the grain direction of the adjacent wood layer is orthogonal to the prepared poplar veneer and eucalyptus veneer Laminate was prepared so as to have a layer structure of: / eucalyptus veneer / eucalyptus veneer / eucalyptus veneer / eucalyptus veneer / poplar veneer.
- the laminate of the above wood layers was hot-pressed for 5 minutes under the conditions of a pressure of 0.78 MPa and a temperature of 110 ° C. using a multistage hot press machine, and the layers were bonded together.
- the thickness of the poplar single plate was 1.2 mm
- the thickness of the eucalyptus single plate was 2.0 mm
- the total thickness of the laminate was 12.4 mm.
- the first layer and the seventh layer were sanded and polished so that the thickness of the first layer was 0.8 mm and the total thickness of the plywood was 11.5 mm. That is, each thickness from the first layer to the sixth layer is 0.8 mm / 2.0 mm / 2.0 mm / 2.0 mm / 2.0 mm / 2.0 mm / 2.0 mm, and by sanding polishing the seventh layer The thickness was adjusted to produce a plywood having a total thickness of 11.5 mm. Other than that was carried out similarly to Example 1, and produced the plywood.
- Example 8 (Production of plywood)
- a poplar single plate having a thickness of 1.3 mm and a specific gravity of 0.43 was prepared by slicing poplar.
- the eucalyptus veneer of thickness 2.1mm and specific gravity 0.55 was prepared by slicing eucalyptus as a 2nd layer.
- a poplar veneer similar to the first layer was prepared as the ninth layer, and eucalyptus veneers similar to the second layer were prepared as the third to eighth layers.
- Poplar veneer / eucalyptus veneer in order from the top to the 9th layer from the first layer through the urea adhesive so that the grain direction of the adjacent wood layer is orthogonal to the prepared poplar veneer and eucalyptus veneer Laminate was prepared to have a layer structure of: / eucalyptus veneer / eucalyptus veneer / eucalyptus veneer / eucalyptus veneer / eucalyptus veneer / eucalyptus veneer / poplar veneer.
- the laminate of the above wood layers was hot-pressed for 5 minutes under the conditions of a pressure of 0.78 MPa and a temperature of 110 ° C. using a multistage hot press machine, and the layers were bonded together.
- the thickness of the poplar single plate was 1.2 mm
- the thickness of the eucalyptus single plate was 1.9 mm
- the total thickness of the laminate was 15.7 mm.
- the first layer and the ninth layer were sanded and polished so that the thickness of the first layer was 0.6 mm and the total thickness of the plywood was 14.5 mm. That is, each thickness from the first layer to the eighth layer is 0.6 mm / 1.9 mm / 1.9 mm / 1.9 mm / 1.9 mm / 1.9 mm / 1.9 mm / 1.9 mm / 1.9 mm / 1.9 mm / 1.9 mm, The thickness was adjusted by sanding and polishing 9 layers to produce a plywood having a total thickness of 14.5 mm. Other than that was carried out similarly to Example 1, and produced the plywood.
- Comparative Example 1 The types and thicknesses of the trees of the first layer and the second layer were as shown in Table 1, and the same single plate as in Example 1 was laminated as the third layer to the seventh layer. That is, each layer from the first layer to the seventh layer was laminated using the same manufacturing method as in Example 1 above, and the thickness was adjusted, so that the poplar single plate 1.2 mm / eucalyptus single plate 2.5 mm / Poplar veneer 1.2mm / eucalyptus veneer 2.5mm / poplar veneer 1.2mm / eucalyptus veneer 2.5mm, thickness is adjusted by sanding polishing the seventh layer poplar veneer, The total thickness was 11.5 mm. Other than that was carried out similarly to Example 1, and produced the plywood.
- Reference example 1 (Production of decorative sheet) A gravure coating method applies urethane cellulose resin (added 5 parts by weight of hexamethylene diisocyanate to 100 parts by weight of a mixture of urethane and nitrified cotton) on one side of a colored polypropylene film having a thickness of 60 ⁇ m subjected to double-sided corona discharge treatment. A back primer layer was formed. The back primer layer was 1 ⁇ m.
- a solid ink layer and a pattern ink layer are sequentially formed by gravure printing using a printing ink containing an acrylic urethane resin (100 parts by weight of acrylic polyol and 5 parts by weight of hexamethylene diisocyanate) as a binder.
- a patterned ink layer was formed.
- the ink layer was 3 ⁇ m.
- a propylene-based resin was heated and melt-extruded with a T-die extruder so as to have a thickness of 80 ⁇ m to form a transparent resin layer.
- the transparent resin layer is subjected to corona discharge treatment, and a surface protective layer is applied to the treated surface by an acrylic urethane-based resin (100 parts by weight of acrylic polyol added with 5 parts by weight of hexamethylene diisocyanate) by a gravure coating method.
- a primer layer was formed.
- the primer layer for the surface protective layer was 1 ⁇ m.
- a urethane acrylate electron beam curable resin is applied onto the primer layer for the surface protective layer by a roll coating method, dried, and then applied to an uncured electron radiation curable resin layer in an environment having an oxygen concentration of 200 ppm or less (
- a surface protective layer made of an electron radiation curable resin was formed by irradiating with an accelerating voltage of 175 KeV and an irradiation amount of 5 Mrad.
- the surface protective layer was 15 ⁇ m.
- embossing is performed from the surface protective layer side with a wood grain conduit embossed plate or a bark / abstract embossed plate with a plate depth of 50 ⁇ m to form a wood grain conduit or bark / abstracted uneven pattern with a thickness of 0.16 mm
- the intermediate of the design layer was obtained.
- a synthetic resin sheet (synthetic resin backer layer) was formed by co-extrusion of A-PET (amorphous polyester) with a T-die extruder.
- the thickness of the backer layer was 0.25 mm, and the Martens hardness was 150 N / mm 2 .
- a synthetic resin backer layer was laminated on the back surface primer layer of the design layer intermediate with a urethane adhesive layer by a dry laminating method to produce a decorative sheet as a design layer.
- the thickness of the decorative sheet was 0.41 mm.
- the synthetic resin backer layer side surface of the decorative sheet and the first layer side surface of the plywood are bonded together via a reactive hot-melt (PUR) adhesive (thickness 50 ⁇ m), and a predetermined dimension (145 mm ⁇ 900 mm) to produce a decorative material.
- PUR reactive hot-melt
- Reference example 2 A decorative sheet was prepared in the same manner as in Reference Example 1 except that the thickness of the backer layer was changed to 0.13 mm and the thickness of the propylene resin was changed from 80 ⁇ m to 60 ⁇ m. The thickness of the decorative sheet was 0.27 mm.
- Reference example 3 A decorative sheet was produced in the same manner as in Reference Example 2 except that the thickness of the backer layer was 0.20 mm. The thickness of the decorative sheet was 0.34 mm.
- a urethane acrylate UV curable coating is applied to the surface of the veneer three times in the order of natural roll coating, reverse roll coating, and natural roll coating to form an undercoat layer consisting of 10 g / m 2. did. Immediately in the air, ultraviolet rays were irradiated with an electroded ultraviolet lamp to cure the undercoat layer.
- the intermediate layer which consists of a coating film of 12 g / m ⁇ 2 > was formed on the hardened undercoat layer with the natural roll coat method. Immediately in the air, the intermediate layer was cured by irradiating ultraviolet rays with an electroded ultraviolet lamp. The surface of the cured intermediate layer was polished with No. 360 polishing paper and the powder generated during polishing was removed.
- the top coat layer which consists of a coating film of 10 g / m ⁇ 2 > was formed in the cured intermediate
- the surface coating layer was formed by irradiating the top coat layer with ultraviolet light using an electrodeless ultraviolet lamp to cure it. Cut into predetermined dimensions (145 mm ⁇ 900 mm) to produce a decorative material.
- the thickness of the surface protective layer was 30 ⁇ m.
- a high-pressure melamine decorative board produced by the following method was prepared instead of the decorative sheet. That is, an ink layer was formed by gravure printing on one surface of white titanium paper having a basis weight of 30 g / m 2 using a urethane resin as a binder, and a pattern was printed. The thickness of the ink layer was 3 ⁇ m. Next, a thermosetting resin composition comprising 50 parts by mass of melamine formaldehyde resin, 45 parts by mass of water, and 5 parts by mass of isopropyl alcohol is prepared, and the melamine resin has a ratio of 100 g / m 2 (when dried).
- a melamine-impregnated decorative sheet was prepared by impregnating the pattern with an impregnation apparatus and drying.
- a melamine-impregnated decorative sheet is laminated on two sheets of phenol resin-impregnated core paper having a basis weight of 245 g / m 2 prepared by impregnating a kraft paper with a resin composition comprising a phenol resin to produce a laminate.
- the laminate is sandwiched between two press plates and heat molded using a hot press machine under conditions of a pressure of 100 kg / cm 2 , a molding temperature of 150 ° C. and a holding time of 10 minutes, and a high-pressure melamine decorative board (thickness 0.4 mm) ) was produced.
- a high-pressure melamine decorative board was used instead of the decorative sheet.
- the adhesive used when bonding the high-pressure melamine decorative board and the surface on the first layer side of the plywood was changed to a water-soluble emulsion adhesive, and the coating thickness was 35 ⁇ m.
- the following water-soluble emulsion adhesives were used.
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Abstract
Description
1.少なくとも上から順に第1層及び第2層を有する合板であって、
(1)前記第1層及び前記第2層は木質材であり、
(2)前記第1層の厚みは1.0mm未満であり、
(3)前記第2層の比重は、前記第1層の比重より大きく、
(4)前記第1層の比重は0.50未満である、
ことを特徴とする合板。
2.前記第1層はポプラ単板であり、前記第2層はユーカリ単板である、項1に記載の合板。
3.前記第1層は中国産ポプラ単板である、項1に記載の合板。
4.前記第1層は、広葉樹単板である、項1に記載の合板。
5.前記第2層の比重は0.50以上である、項1に記載の合板。
6.前記第2層は、前記第1層側の表面の少なくとも一部に節を有しており、前記第1層の節は、前記第2層の節より少ない、項1に記載の合板。
7.前記合板の層数は、5層又は7層である、項1に記載の合板。
8.床用化粧材用合板である、項1に記載の合板。
9.前記第1層の厚みは0.6mm以上0.9mm以下である、項1に記載の合板。
10.少なくとも第1層及び第2層を有する合板の製造方法であって、
(I)前記第1層と前記第2層とを積層する工程1、及び
(II)前記工程1の後に、前記第1層の表面を研磨して、前記第1層の厚みを1.0mm未満に調整する工程2を有し、
(1)前記第1層及び前記第2層は木質材であり、
(2)前記第1層の厚みは1.0mm未満であり、
(3)前記第2層の比重は、前記第1層の比重より大きく、
(4)前記第1層の比重は0.50未満である、
ことを特徴とする合板の製造方法。
11. 少なくとも上から順に第1層及び第2層を有する合板の製造方法であって、
(I)前記第1層として気乾比重0.40以上0.47以下のポプラ単板、及び、前記第2層として気乾比重0.50以上0.90以下のユーカリ単板を用意する工程1、
(II)前記第1層と前記第2層とを積層する工程2、並びに、
(III)前記工程2の後に、前記第1層の表面を研磨して、前記第1層の厚みを1.0mm未満に調整する工程3を有する、
ことを特徴とする合板の製造方法。 That is, this invention relates to the manufacturing method of the following plywood and plywood.
1. A plywood having at least a first layer and a second layer in order from the top,
(1) The first layer and the second layer are made of wood.
(2) The thickness of the first layer is less than 1.0 mm,
(3) The specific gravity of the second layer is greater than the specific gravity of the first layer,
(4) The specific gravity of the first layer is less than 0.50.
Plywood characterized by that.
2. The plywood according to
3.
4). The plywood according to
5).
6).
7).
8).
9.
10. A method for producing a plywood having at least a first layer and a second layer,
(I)
(1) The first layer and the second layer are made of wood.
(2) The thickness of the first layer is less than 1.0 mm,
(3) The specific gravity of the second layer is greater than the specific gravity of the first layer,
(4) The specific gravity of the first layer is less than 0.50.
The manufacturing method of the plywood characterized by this.
11. A method for producing a plywood having a first layer and a second layer in order from at least the top,
(I) A step of preparing a poplar single plate having an air-dry specific gravity of 0.40 to 0.47 as the first layer and a eucalyptus single plate having an air-dry specific gravity of 0.50 to 0.90 as the second layer. 1,
(II)
(III) After the
The manufacturing method of the plywood characterized by this.
本発明の合板は、少なくとも上から順に第1層及び第2層を有する合板であって、(1)前記第1層及び前記第2層は木質材であり、(2)前記第1層の厚みは1.0mm未満であり、(3)前記第2層の比重は、前記第1層の比重より大きく、(4)前記第1層の比重は0.50未満であることを特徴とする。 1. The plywood of the present invention is a plywood having at least a first layer and a second layer in order from the top, (1) the first layer and the second layer are wood materials, and (2) the first layer. The thickness of is less than 1.0 mm, (3) the specific gravity of the second layer is greater than the specific gravity of the first layer, and (4) the specific gravity of the first layer is less than 0.50. To do.
G=[m0(g)-m1(g)]/[(h0(cm)-h1(cm))×S(cm2)] (式)
なお、上記式においては、単位はg/cm3であるが、当該単位を省略して比重とする。 In addition, “specific gravity” in the present specification is a value measured by the following measuring method. That is, the plywood is cut out to a certain size, for example, 10 × 10 cm (FIG. 4A). The surface area of the plywood at this time is defined as S (cm 2 ). In the case of the above-mentioned 10 × 10 cm, S is 100 cm 2 . The cut plywood is left to dry in a dryer at a temperature of 103 ± 2 ° C. for 72 hours. Next, when the layer to be measured for measuring the specific gravity is located on the outermost layer (for example, the first layer), the weight m0 (g) and the thickness h0 (cm) of the plywood after drying are measured. Next, the layer to be measured (first layer) is shaved from the surface in the thickness direction to remove a part of the layer to be measured, thereby reducing the thickness of the layer to be measured (FIG. 4B). The weight m1 (g) and thickness h1 (cm) of the plywood after removing a part of the layer to be measured are measured. From the measured value, the specific gravity G of the layer to be measured is measured based on the following formula.
G = [m0 (g) −m1 (g)] / [(h0 (cm) −h1 (cm)) × S (cm 2 )] (Formula)
In the above formula, the unit is g / cm 3 , but the unit is omitted and the specific gravity is used.
第1層としては、後述するように、第2層の比重よりも小さく、その比重が0.50未満であればその樹木の種類は限定されない。第1層としては、広葉樹単板が好ましい。第1層としては、具体的には、早生樹であるポプラ単板、ファルカタ単板等が挙げられる。これらの中でも、低比重の中でも比較的比重が高く、表面の平滑性に優れ、節が少ない点で、ポプラ単板がより好ましい。また、ポプラ単板としては、中国産ポプラを用いたポプラ単板を好適に用いることができる。 (First layer)
As will be described later, the type of tree is not limited as long as the first layer is smaller than the specific gravity of the second layer and the specific gravity is less than 0.50. The first layer is preferably a hardwood veneer. Specific examples of the first layer include poplar veneers and falkata veneers that are fast-growing trees. Among these, a poplar single plate is more preferable because it has a relatively high specific gravity among low specific gravity, excellent surface smoothness, and few nodes. Moreover, as the poplar single plate, a poplar single plate using Chinese poplar can be preferably used.
第2層としては、比重が第1層の比重よりも大きければその樹木の種類は限定されない。第2層としては、比較的高比重である点で、ユーカリ単板が好ましい。 (Second layer)
As a 2nd layer, if the specific gravity is larger than the specific gravity of a 1st layer, the kind of the tree will not be limited. As the second layer, a eucalyptus veneer is preferable in that it has a relatively high specific gravity.
(1)前記第1層及び前記第2層は木質材であり、
(2)前記第1層の厚みは1.0mm未満であり、
(3)前記第2層の比重は、前記第1層の比重より大きい化粧材が挙げられる。 The decorative material is a decorative material having a design layer on the first layer of the plywood having the first layer and the second layer in order from the top,
(1) The first layer and the second layer are made of wood.
(2) The thickness of the first layer is less than 1.0 mm,
(3) The second layer may have a specific gravity greater than that of the first layer.
意匠層としては、本発明の合板に意匠性を付与することができれば特に限定されず、例えば、天然の木材をスライスした突板;メラミン化粧板等の、熱硬化型樹脂を含浸させた樹脂含浸紙を高温高圧で積層成形した樹脂化粧板;合成樹脂製等で構成される化粧シートが挙げられる。それ以外に合板の表面に着色や印刷により模様を設けてもよいし、また転写により意匠を形成してもよい。 (Design layer)
The design layer is not particularly limited as long as design properties can be imparted to the plywood of the present invention. For example, a resin-impregnated paper impregnated with thermosetting resin such as a veneer sliced from natural wood; a melamine decorative board And a decorative sheet made of synthetic resin or the like. In addition, a pattern may be provided on the surface of the plywood by coloring or printing, or a design may be formed by transfer.
基材シートとしては、1)薄紙,上質紙,クラフト紙,和紙,チタン紙,樹脂含浸紙,紙間強化紙等の紙、2)木質繊維,ガラス繊維,石綿,ポリエステル繊維,ビニロン繊維,レーヨン繊維等からなる織布又は不織布、3)ポリオレフィン,ポリエステル,ポリアクリル,ポリアミド,ポリウレタン,ポリスチレン等の合成樹脂製シート、の1種又は2種以上の積層体が挙げられる。その中でも、3)の合成樹脂製シートが好ましい。 (Substrate sheet)
The base sheet is 1) paper such as thin paper, fine paper, kraft paper, Japanese paper, titanium paper, resin-impregnated paper, inter-paper reinforced paper, etc. 2) wood fiber, glass fiber, asbestos, polyester fiber, vinylon fiber, rayon Examples thereof include one or two or more laminates of woven or non-woven fabric made of fibers and the like, and 3) sheets of synthetic resin such as polyolefin, polyester, polyacryl, polyamide, polyurethane, and polystyrene. Among these, the synthetic resin sheet of 3) is preferable.
絵柄層は、柄インキ層及び/又はベタインキ層から構成される。絵柄層は、グラビア印刷、オフセット印刷、シルクスクリーン印刷等の印刷法により形成できる。柄インキ層の模様は、例えば、木目模様、石目模様、布目模様、皮紋模様、幾何学模様、文字、記号、線画、各種抽象模様等が挙げられる。ベタインキ層は、着色インキのベタ印刷により得られる。絵柄層は、柄インキ層及びベタインキ層の片方又は両方から構成される。 (Picture layer)
The pattern layer is composed of a pattern ink layer and / or a solid ink layer. The pattern layer can be formed by a printing method such as gravure printing, offset printing or silk screen printing. Examples of the pattern of the pattern ink layer include a wood grain pattern, a stone pattern, a cloth pattern, a skin pattern, a geometric pattern, characters, symbols, line drawings, various abstract patterns, and the like. The solid ink layer is obtained by solid printing of colored ink. The pattern layer is composed of one or both of a pattern ink layer and a solid ink layer.
透明性接着剤層は、必要に応じて絵柄層と透明性樹脂層との間に設けられる。透明性接着剤層は、例えば、2液硬化型ウレタン樹脂等の公知のドライラミネーション用接着剤を塗布・乾燥させることにより得られる。 (Transparent adhesive layer)
The transparent adhesive layer is provided between the picture layer and the transparent resin layer as necessary. The transparent adhesive layer can be obtained, for example, by applying and drying a known dry lamination adhesive such as a two-component curable urethane resin.
透明性樹脂層は、透明性の樹脂層であれば特に限定されず、例えば、透明性の熱可塑性樹脂により好適に形成できる。 (Transparent resin layer)
A transparent resin layer will not be specifically limited if it is a transparent resin layer, For example, it can form suitably with a transparent thermoplastic resin.
表面保護層(透明性表面保護層)は、意匠層に要求される耐擦傷性、耐摩耗性、耐水性、耐汚染性等の表面物性を付与するために設けられる。この表面保護層を形成する樹脂としては、熱硬化型樹脂又は電離放射線硬化型樹脂等の硬化型樹脂の少なくとも1種を含むことが好ましい。特に、電離放射線硬化型樹脂は高い表面硬度、生産性等の観点から好ましい。更に、耐候性をより一層向上させることができる観点から、電子線硬化型樹脂が最も好ましい。 (Surface protective layer)
The surface protective layer (transparent surface protective layer) is provided for imparting surface physical properties such as scratch resistance, abrasion resistance, water resistance, and stain resistance required for the design layer. The resin forming the surface protective layer preferably includes at least one curable resin such as a thermosetting resin or an ionizing radiation curable resin. In particular, ionizing radiation curable resins are preferable from the viewpoint of high surface hardness, productivity, and the like. Furthermore, from the viewpoint of further improving the weather resistance, an electron beam curable resin is most preferable.
上記化粧シートは、化粧シートの最下層、すなわち意匠層の合板側に合成樹脂製バッカー層を有することが好ましい。合成樹脂製バッカー層を有することにより、化粧材の耐衝撃性がより一層向上する。 (Backer layer made of synthetic resin)
The decorative sheet preferably has a synthetic resin backer layer on the lowermost layer of the decorative sheet, that is, on the plywood side of the design layer. By having the synthetic resin backer layer, the impact resistance of the decorative material is further improved.
本発明の合板の製造方法は、少なくとも上から順に第1層及び第2層を有する合板の製造方法であって、
(I)前記第1層と前記第2層とを積層する工程1、及び
(II)前記工程1の後に、前記第1層の表面を研磨して、前記第1層の厚みを1.0mm未満に調整する工程2を有し、
(1)前記第1層及び前記第2層は木質材であり、
(2)前記第1層の厚みは1.0mm未満であり、
(3)前記第2層の比重は、前記第1層の比重より大きく、
(4)前記第1層の比重は0.50未満である製造方法である。当該製造方法を、製造方法1と称する。 2. Manufacturing method of plywood The manufacturing method of plywood of the present invention is a manufacturing method of plywood having at least a first layer and a second layer in order from the top,
(I)
(1) The first layer and the second layer are made of wood.
(2) The thickness of the first layer is less than 1.0 mm,
(3) The specific gravity of the second layer is greater than the specific gravity of the first layer,
(4) In the manufacturing method, the specific gravity of the first layer is less than 0.50. This manufacturing method is referred to as
工程1は、第1層と第2層とを積層する工程である。上記第1層及び上記第2層、並びにそれらの厚み、比重については、上述の合板において説明した内容と同一である。 (Process 1)
工程2は、工程1の後に、第1層の表面を研磨して、第1層の厚みを1.0mm未満に調整する工程である。工程1により、第1層と第2層とを積層した後に、工程2により第1層の表面を研磨することにより、第1層の厚みを均一化することができる。 (Process 2)
(I)前記第1層として気乾比重0.40以上0.47以下のポプラ単板、及び、前記第2層として気乾比重0.50以上0.90以下のユーカリ単板を用意する工程1、
(II)前記第1層と前記第2層とを積層する工程2、並びに、
(III)前記工程2の後に、前記第1層の表面を研磨して、前記第1層の厚みを1.0mm未満に調整する工程3を有する合板の製造方法である。当該製造方法を製造方法2と称する。 The method for producing a plywood of the present invention is also a method for producing a plywood having at least a first layer and a second layer in order from the top,
(I) A step of preparing a poplar single plate having an air-dry specific gravity of 0.40 to 0.47 as the first layer and a eucalyptus single plate having an air-dry specific gravity of 0.50 to 0.90 as the second layer. 1,
(II)
(III) A method for manufacturing a plywood having a step 3 of adjusting the thickness of the first layer to less than 1.0 mm by polishing the surface of the first layer after the
ポプラ単板:0.43
ユーカリ単板:0.55 In the following examples, comparative examples, and reference examples, the specific gravity of each layer was measured from the produced plywood, and the results were as follows.
Poplar single plate: 0.43
Eucalyptus veneer: 0.55
(合板の作製)
第1層として、ポプラをスライスすることにより、厚み1.3mm、比重0.43のポプラ単板を用意した。また、第2層として、ユーカリをスライスすることにより、厚み2.7mm、比重0.55のユーカリ単板を用意した。さらに、第3層、第5層、第7層として上記第1層と同様のポプラ単板を用意し、第4層、第6層として上記第2層と同様のユーカリ単板を用意した。用意したポプラ単板及びユーカリ単板を、隣接する木質層の木目方向が直交するようにして、ユリア系接着剤を介して第1層から第7層まで上から順にポプラ単板/ユーカリ単板/ポプラ単板/ユーカリ単板/ポプラ単板/ユーカリ単板/ポプラ単板の層構成となるように積層し、木質層の積層体を調製した。 Example 1
(Production of plywood)
As a first layer, a poplar single plate having a thickness of 1.3 mm and a specific gravity of 0.43 was prepared by slicing poplar. As the second layer, a eucalyptus veneer having a thickness of 2.7 mm and a specific gravity of 0.55 was prepared by slicing eucalyptus. Further, poplar single plates similar to the first layer were prepared as the third layer, fifth layer, and seventh layer, and eucalyptus single plates similar to the second layer were prepared as the fourth layer and sixth layer. Poplar veneer / eucalyptus veneer in order from the top to the seventh layer from the first layer through the urea adhesive so that the grain direction of the adjacent wood layer is orthogonal to the prepared poplar veneer and eucalyptus veneer A laminate of wood layers was prepared so as to have a layer structure of: / poplar single plate / eucalyptus single plate / poplar single plate / eucalyptus single plate / poplar single plate.
第1層及び第2層の樹木の種類及び厚みを表1のようにするとともに、第3層から第7層として実施例1と同様の単板を積層した。すなわち、第1層から第7層までのそれぞれの層を、上記実施例1と同様の製造方法を用いて積層するとともに厚み調整を行い、ポプラ単板0.8mm/ユーカリ単板2.5mm/ポプラ単板1.2mm/ユーカリ単板2.5mm/ポプラ単板1.2mm/ユーカリ単板2.5mmとし、第7層としてのポプラ単板をサンディング研磨することにより厚みを調整して、合板の総厚みを11.5mmとした。それ以外は実施例1と同様にして、合板を作製した。 Example 2
The types and thicknesses of the trees of the first layer and the second layer were as shown in Table 1, and the same single plate as in Example 1 was laminated as the third layer to the seventh layer. That is, the layers from the first layer to the seventh layer were laminated using the same manufacturing method as in Example 1 above, and the thickness was adjusted, so that the poplar single plate 0.8 mm / eucalyptus single plate 2.5 mm / Poplar veneer 1.2mm / eucalyptus veneer 2.5mm / poplar veneer 1.2mm / eucalyptus veneer 2.5mm, adjusting thickness by sanding polishing poplar veneer as the seventh layer, plywood The total thickness was 11.5 mm. Other than that was carried out similarly to Example 1, and produced the plywood.
第1層及び第2層の樹木の種類及び厚みを表1のようにするとともに、第3層から第7層として実施例1と同様の単板を積層した。すなわち、第1層から第7層までのそれぞれの層を、上記実施例1と同様の製造方法を用いて積層するとともに厚み調整を行い、ポプラ単板0.6mm/ユーカリ単板2.5mm/ポプラ単板1.2mm/ユーカリ単板2.5mm/ポプラ単板1.2mm/ユーカリ単板2.5mmとし、第7層としてのポプラ単板をサンディング研磨することにより厚みを調整して、合板の総厚みを11.5mmとした。それ以外は実施例1と同様にして、合板を作製した。 Example 3
The types and thicknesses of the trees of the first layer and the second layer were as shown in Table 1, and the same single plate as in Example 1 was laminated as the third layer to the seventh layer. That is, each layer from the first layer to the seventh layer is laminated using the same manufacturing method as in Example 1 above, and the thickness is adjusted, so that the poplar single plate 0.6 mm / eucalyptus single plate 2.5 mm / Poplar veneer 1.2mm / eucalyptus veneer 2.5mm / poplar veneer 1.2mm / eucalyptus veneer 2.5mm, adjusting thickness by sanding polishing poplar veneer as the seventh layer, plywood The total thickness was 11.5 mm. Other than that was carried out similarly to Example 1, and produced the plywood.
(合板の作製)
第1層として、ポプラをスライスすることにより、厚み1.4mm、比重0.43のポプラ単板を用意した。また、第2層として、ユーカリをスライスすることにより、厚み2.7mm、比重0.55のユーカリ単板を用意した。さらに、第3層、第5層、第7層として上記第1層と同様のポプラ単板を用意し、第4層、第6層として上記第2層と同様のユーカリ単板を用意した。用意したポプラ単板及びユーカリ単板を、隣接する木質層の木目方向が直交するようにして、ユリア系接着剤を介して第1層から第7層まで上から順にポプラ単板/ユーカリ単板/ポプラ単板/ユーカリ単板/ポプラ単板/ユーカリ単板/ポプラ単板の層構成となるように積層し、木質層の積層体を調製した。 Example 4
(Production of plywood)
As a first layer, a poplar single plate having a thickness of 1.4 mm and a specific gravity of 0.43 was prepared by slicing poplar. As the second layer, a eucalyptus veneer having a thickness of 2.7 mm and a specific gravity of 0.55 was prepared by slicing eucalyptus. Further, poplar single plates similar to the first layer were prepared as the third layer, fifth layer, and seventh layer, and eucalyptus single plates similar to the second layer were prepared as the fourth layer and sixth layer. Poplar veneer / eucalyptus veneer in order from the top to the seventh layer from the first layer through the urea adhesive so that the grain direction of the adjacent wood layer is orthogonal to the prepared poplar veneer and eucalyptus veneer A laminate of wood layers was prepared so as to have a layer structure of: / poplar single plate / eucalyptus single plate / poplar single plate / eucalyptus single plate / poplar single plate.
(合板の作製)
第1層として、ポプラをスライスすることにより、厚み3.5mm、比重0.43のポプラ単板を用意した。また、第2層として、ユーカリをスライスすることにより、厚み3.5mm、比重0.55のユーカリ単板を用意した。さらに、第3層、第5層として上記第1層と同様のポプラ単板を用意し、第4層として上記第2層と同様のユーカリ単板を用意した。用意したポプラ単板及びユーカリ単板を、隣接する木質層の木目方向が直交するようにして、ユリア系接着剤を介して第1層から第5層まで上から順にポプラ単板/ユーカリ単板/ポプラ単板/ユーカリ単板/ポプラ単板の層構成となるように積層し、木質層の積層体を調製した。 Example 5
(Production of plywood)
As a first layer, a poplar single plate having a thickness of 3.5 mm and a specific gravity of 0.43 was prepared by slicing poplar. Moreover, the eucalyptus single board of thickness 3.5mm and specific gravity 0.55 was prepared by slicing eucalyptus as a 2nd layer. Further, poplar single plates similar to the first layer were prepared as the third layer and the fifth layer, and eucalyptus single plates similar to the second layer were prepared as the fourth layer. Poplar veneer / eucalyptus veneer in order from the top to the 5th layer from the 1st layer through the urea adhesive so that the grain direction of the adjacent wood layer is orthogonal to the prepared poplar veneer and eucalyptus veneer A laminate of wood layers was prepared by laminating so as to have a layer structure of / poplar single plate / eucalyptus single plate / poplar single plate.
第1層及び第2層の樹木の種類及び厚みを表1のようにするとともに、第3層から第7層として実施例1と同様の単板を積層した。すなわち、第1層から第7層までのそれぞれの層を、上記実施例1と同様の製造方法を用いて積層するとともに厚み調整を行い、ファルカタ単板0.6mm/ユーカリ単板2.5mm/ポプラ単板1.2mm/ユーカリ単板2.5mm/ポプラ単板1.2mm/ユーカリ単板2.5mmとし、第7層としてのポプラ単板をサンディング研磨することにより厚みを調整して、合板の総厚みを11.5mmとした。それ以外は実施例1と同様にして、合板を作製した。 Example 6
The types and thicknesses of the trees of the first layer and the second layer were as shown in Table 1, and the same single plate as in Example 1 was laminated as the third layer to the seventh layer. That is, the layers from the first layer to the seventh layer were laminated using the same manufacturing method as in Example 1 above, and the thickness was adjusted, so that Falkata single plate 0.6 mm / eucalyptus single plate 2.5 mm / Poplar veneer 1.2mm / eucalyptus veneer 2.5mm / poplar veneer 1.2mm / eucalyptus veneer 2.5mm, adjusting thickness by sanding polishing poplar veneer as the seventh layer, plywood The total thickness was 11.5 mm. Other than that was carried out similarly to Example 1, and produced the plywood.
(合板の作製)
第1層として、ポプラをスライスすることにより、厚み1.3mm、比重0.43のポプラ単板を用意した。また、第2層として、ユーカリをスライスすることにより、厚み2.2mm、比重0.55のユーカリ単板を用意した。さらに、第7層として上記第1層と同様のポプラ単板を用意し、第3層から第6層として上記第2層と同様のユーカリ単板を用意した。用意したポプラ単板及びユーカリ単板を、隣接する木質層の木目方向が直交するようにして、ユリア系接着剤を介して第1層から第7層まで上から順にポプラ単板/ユーカリ単板/ユーカリ単板/ユーカリ単板/ユーカリ単板/ユーカリ単板/ポプラ単板の層構成となるように積層し、木質層の積層体を調製した。 Example 7
(Production of plywood)
As a first layer, a poplar single plate having a thickness of 1.3 mm and a specific gravity of 0.43 was prepared by slicing poplar. Further, as a second layer, eucalyptus single plates having a thickness of 2.2 mm and a specific gravity of 0.55 were prepared by slicing eucalyptus. Further, a poplar veneer similar to the first layer was prepared as the seventh layer, and eucalyptus veneers similar to the second layer were prepared as the third to sixth layers. Poplar veneer / eucalyptus veneer in order from the top to the seventh layer from the first layer through the urea adhesive so that the grain direction of the adjacent wood layer is orthogonal to the prepared poplar veneer and eucalyptus veneer Laminate was prepared so as to have a layer structure of: / eucalyptus veneer / eucalyptus veneer / eucalyptus veneer / eucalyptus veneer / poplar veneer.
(合板の作製)
第1層として、ポプラをスライスすることにより、厚み1.3mm、比重0.43のポプラ単板を用意した。また、第2層として、ユーカリをスライスすることにより、厚み2.1mm、比重0.55のユーカリ単板を用意した。さらに、第9層として上記第1層と同様のポプラ単板を用意し、第3層から第8層として上記第2層と同様のユーカリ単板を用意した。用意したポプラ単板及びユーカリ単板を、隣接する木質層の木目方向が直交するようにして、ユリア系接着剤を介して第1層から第9層まで上から順にポプラ単板/ユーカリ単板/ユーカリ単板/ユーカリ単板/ユーカリ単板/ユーカリ単板/ユーカリ単板/ユーカリ単板/ポプラ単板の層構成となるように積層し、木質層の積層体を調製した。 Example 8
(Production of plywood)
As a first layer, a poplar single plate having a thickness of 1.3 mm and a specific gravity of 0.43 was prepared by slicing poplar. Moreover, the eucalyptus veneer of thickness 2.1mm and specific gravity 0.55 was prepared by slicing eucalyptus as a 2nd layer. Furthermore, a poplar veneer similar to the first layer was prepared as the ninth layer, and eucalyptus veneers similar to the second layer were prepared as the third to eighth layers. Poplar veneer / eucalyptus veneer in order from the top to the 9th layer from the first layer through the urea adhesive so that the grain direction of the adjacent wood layer is orthogonal to the prepared poplar veneer and eucalyptus veneer Laminate was prepared to have a layer structure of: / eucalyptus veneer / eucalyptus veneer / eucalyptus veneer / eucalyptus veneer / eucalyptus veneer / eucalyptus veneer / poplar veneer.
第1層及び第2層の樹木の種類及び厚みを表1のようにするとともに、第3層から第7層として実施例1と同様の単板を積層した。すなわち、第1層から第7層までのそれぞれの層を、上記実施例1と同様の製造方法を用いて積層するとともに厚み調整を行い、ポプラ単板1.2mm/ユーカリ単板2.5mm/ポプラ単板1.2mm/ユーカリ単板2.5mm/ポプラ単板1.2mm/ユーカリ単板2.5mmとし、第7層のポプラ単板をサンディング研磨することにより厚みを調整して、合板の総厚みを11.5mmとした。それ以外は実施例1と同様にして、合板を作製した。 Comparative Example 1
The types and thicknesses of the trees of the first layer and the second layer were as shown in Table 1, and the same single plate as in Example 1 was laminated as the third layer to the seventh layer. That is, each layer from the first layer to the seventh layer was laminated using the same manufacturing method as in Example 1 above, and the thickness was adjusted, so that the poplar single plate 1.2 mm / eucalyptus single plate 2.5 mm / Poplar veneer 1.2mm / eucalyptus veneer 2.5mm / poplar veneer 1.2mm / eucalyptus veneer 2.5mm, thickness is adjusted by sanding polishing the seventh layer poplar veneer, The total thickness was 11.5 mm. Other than that was carried out similarly to Example 1, and produced the plywood.
上述のようにして作製された実施例及び比較例の合板について、以下の方法により評価を行った。 (Evaluation)
The plywood of Examples and Comparative Examples produced as described above was evaluated by the following method.
「JISK5600-5-3(1999) 塗料一般試験方法 塗膜の機械的性質-第3節:耐おもり落下性 デュポン式」に記載のデュポン衝撃試験に従って、実施例及び比較例で得られた合板の表面上に、半径6.35mmの半球形状の先端を有した撃ち型を静置させ、当該撃ち型上に500gのおもりを高さ300mmから落下させた。凹み量を、図3で示すようにして測定器(株式会社尾崎製作所 T2-127)で測定し、下記合板の評価基準に従って評価した。本試験において、合板がB以上の評価であれば実使用において問題ないと評価される。
[合板の評価基準]
A:600μm以下
B:600μmを超え、700μm以下
C:700μmを超える (1) Impact resistance test (DuPont impact test)
In accordance with the DuPont impact test described in “JISK5600-5-3 (1999) Coating General Test Method, Mechanical Properties of Coating Film—Section 3: Weight Drop Resistance DuPont”, the plywood obtained in Examples and Comparative Examples A shooting mold having a hemispherical tip with a radius of 6.35 mm was left on the surface, and a 500 g weight was dropped from a height of 300 mm onto the shooting mold. The amount of dents was measured with a measuring instrument (Ozaki Mfg. Co., Ltd. T2-127) as shown in FIG. In this test, if the plywood is evaluated as B or higher, it is evaluated that there is no problem in actual use.
[Evaluation criteria for plywood]
A: 600 μm or less B: Over 600 μm, 700 μm or less C: Over 700 μm
(化粧シートの作製)
両面コロナ放電処理した60μm厚さの着色ポリプロピレンフィルムの一方の面にウレタンセルロース系樹脂(ウレタン及び硝化綿の混合物100重量部に対してヘキサメチレンジイソシアネート5重量部を添加したもの)をグラビア塗工法により、裏面プライマー層を形成した。裏面プライマー層は1μmであった。 Reference example 1
(Production of decorative sheet)
A gravure coating method applies urethane cellulose resin (added 5 parts by weight of hexamethylene diisocyanate to 100 parts by weight of a mixture of urethane and nitrified cotton) on one side of a colored polypropylene film having a thickness of 60 μm subjected to double-sided corona discharge treatment. A back primer layer was formed. The back primer layer was 1 μm.
実施例1と同様にして、合板を作製した。 (Production of plywood)
A plywood was produced in the same manner as in Example 1.
化粧シートの合成樹脂製バッカー層側の面と、合板の第1層側の面とを、反応性ホットメルト系(PUR)接着剤(厚み50μm)を介して貼り合わせ、所定の寸法(145mm×900mm)に裁断して、化粧材を作製した。 (Production of cosmetic materials)
The synthetic resin backer layer side surface of the decorative sheet and the first layer side surface of the plywood are bonded together via a reactive hot-melt (PUR) adhesive (
バッカー層の厚みを0.13mmとし、プロピレン系樹脂の厚さを80μmから60μmに変更した以外は参考例1と同様にして、化粧シートを作製した。化粧シートの厚みは0.27mmであった。 Reference example 2
A decorative sheet was prepared in the same manner as in Reference Example 1 except that the thickness of the backer layer was changed to 0.13 mm and the thickness of the propylene resin was changed from 80 μm to 60 μm. The thickness of the decorative sheet was 0.27 mm.
バッカー層の厚みを0.20mmにした以外は参考例2と同様にして、化粧シートを作製した。化粧シートの厚みは0.34mmであった。 Reference example 3
A decorative sheet was produced in the same manner as in Reference Example 2 except that the thickness of the backer layer was 0.20 mm. The thickness of the decorative sheet was 0.34 mm.
(合板の作製)
実施例1と同様にして、合板を作製した。 Reference example 4
(Production of plywood)
A plywood was produced in the same manner as in Example 1.
意匠層を形成する突板として、厚み0.20mmのナラ材の突板を用意した。突板と、合板の第1層側の面とを、熱硬化型のフェノール系接着剤を介して貼り合わせた。 (Production of cosmetic materials)
As a veneer for forming the design layer, a 0.20 mm thick oak veneer was prepared. The veneer and the surface on the first layer side of the plywood were bonded together through a thermosetting phenolic adhesive.
(合板の作製)
実施例1と同様にして、合板を作製した。 Reference Example 5
(Production of plywood)
A plywood was produced in the same manner as in Example 1.
意匠層として、化粧シートの代わりに下記方法で作製した高圧メラミン化粧板を用意した。すなわち、坪量30g/m2の白チタン紙の一方の面に、ウレタン系樹脂をバインダーとする印刷インキを用いて、グラビア印刷によりインキ層を形成し、絵柄模様を印刷した。インキ層の厚みは3μmであった。次いで、メラミンホルムアルデヒド樹脂50質量部、水45質量部、及びイソプロピルアルコール5質量部からなる熱硬化性樹脂組成物を調製し、メラミン樹脂が100g/m2(乾燥時)の割合となるように、含浸装置を用いて絵柄模様上から含浸させ、乾燥させることによりメラミン含浸化粧シートを作製した。次いで、クラフト紙に、フェノール樹脂からなる樹脂組成物を含浸させて調製した、坪量245g/m2のフェノール樹脂含浸コア紙2枚の上に、メラミン含浸化粧シートを積層して積層体を作製した。当該積層体を、2枚のプレス板で挟み、熱プレス機を用いて圧力100kg/cm2、成型温度150℃、保持時間10分間の条件で加熱成型し、高圧メラミン化粧板(厚み0.4mm)を作製した。 (Production of cosmetic materials)
As a design layer, a high-pressure melamine decorative board produced by the following method was prepared instead of the decorative sheet. That is, an ink layer was formed by gravure printing on one surface of white titanium paper having a basis weight of 30 g / m 2 using a urethane resin as a binder, and a pattern was printed. The thickness of the ink layer was 3 μm. Next, a thermosetting resin composition comprising 50 parts by mass of melamine formaldehyde resin, 45 parts by mass of water, and 5 parts by mass of isopropyl alcohol is prepared, and the melamine resin has a ratio of 100 g / m 2 (when dried). A melamine-impregnated decorative sheet was prepared by impregnating the pattern with an impregnation apparatus and drying. Next, a melamine-impregnated decorative sheet is laminated on two sheets of phenol resin-impregnated core paper having a basis weight of 245 g / m 2 prepared by impregnating a kraft paper with a resin composition comprising a phenol resin to produce a laminate. did. The laminate is sandwiched between two press plates and heat molded using a hot press machine under conditions of a pressure of 100 kg / cm 2 , a molding temperature of 150 ° C. and a holding time of 10 minutes, and a high-pressure melamine decorative board (thickness 0.4 mm) ) Was produced.
主剤:「BA-10L」ジャパンコーティングレジン株式会社製、変性エチレン・酢酸ビニル系
硬化剤:「BA-11B」ジャパンコーティングレジン株式会社製、イソシアネート系
配合比:主剤:硬化剤=100:2.5(質量比) Water-soluble emulsion adhesive main agent: “BA-10L” manufactured by Japan Coating Resin Co., Ltd., modified ethylene / vinyl acetate type curing agent: “BA-11B” manufactured by Japan Coating Resin Co., Ltd., isocyanate-based ratio: main agent: curing agent = 100: 2.5 (mass ratio)
上述のようにして作製された参考例の化粧材について、上記評価方法により耐衝撃試験を行い、凹み量を測定した。 (Evaluation)
About the decorative material of the reference example produced as mentioned above, the impact resistance test was done by the said evaluation method, and the amount of dents was measured.
11,21.第1層
12,22.第2層
13,23.第3層
14,24.第4層
15,25.第5層
211.厚みを薄くした第1層
221.厚みを薄くした第2層
26.第6層
27.第7層
m.測定器
A.雄サネ
B.雌サネ
1,2,4.
Claims (11)
- 少なくとも上から順に第1層及び第2層を有する合板であって、
(1)前記第1層及び前記第2層は木質材であり、
(2)前記第1層の厚みは1.0mm未満であり、
(3)前記第2層の比重は、前記第1層の比重より大きく、
(4)前記第1層の比重は0.50未満である、
ことを特徴とする合板。 A plywood having at least a first layer and a second layer in order from the top,
(1) The first layer and the second layer are made of wood.
(2) The thickness of the first layer is less than 1.0 mm,
(3) The specific gravity of the second layer is greater than the specific gravity of the first layer,
(4) The specific gravity of the first layer is less than 0.50.
Plywood characterized by that. - 前記第1層はポプラ単板であり、前記第2層はユーカリ単板である、請求項1に記載の合板。 The plywood according to claim 1, wherein the first layer is a poplar veneer and the second layer is a eucalyptus veneer.
- 前記第1層は中国産ポプラ単板である、請求項1に記載の合板。 The plywood according to claim 1, wherein the first layer is a Chinese poplar veneer.
- 前記第1層は、広葉樹単板である、請求項1に記載の合板。 The plywood according to claim 1, wherein the first layer is a hardwood veneer.
- 前記第2層の比重は0.50以上である、請求項1に記載の合板。 The plywood according to claim 1, wherein the specific gravity of the second layer is 0.50 or more.
- 前記第2層は、前記第1層側の表面の少なくとも一部に節を有しており、前記第1層の節は、前記第2層の節より少ない、請求項1に記載の合板。 The plywood according to claim 1, wherein the second layer has a node on at least a part of the surface on the first layer side, and the node of the first layer is smaller than the node of the second layer.
- 前記合板の層数は、5層又は7層である、請求項1に記載の合板。 The plywood according to claim 1, wherein the number of layers of the plywood is 5 layers or 7 layers.
- 床用化粧材用合板である、請求項1に記載の合板。 The plywood according to claim 1, which is a plywood for a flooring decorative material.
- 前記第1層の厚みは0.6mm以上0.9mm以下である、請求項1に記載の合板。 The plywood according to claim 1, wherein the thickness of the first layer is 0.6 mm or more and 0.9 mm or less.
- 少なくとも上から順に第1層及び第2層を有する合板の製造方法であって、
(I)前記第1層と前記第2層とを積層する工程1、及び
(II)前記工程1の後に、前記第1層の表面を研磨して、前記第1層の厚みを1.0mm未満に調整する工程2を有し、
(1)前記第1層及び前記第2層は木質材であり、
(2)前記第1層の厚みは1.0mm未満であり、
(3)前記第2層の比重は、前記第1層の比重より大きく、
(4)前記第1層の比重は0.50未満である、
ことを特徴とする合板の製造方法。 A method for producing a plywood having a first layer and a second layer in order from at least the top,
(I) Step 1 for laminating the first layer and the second layer, and (II) After the step 1, the surface of the first layer is polished so that the thickness of the first layer is 1.0 mm. Having step 2 of adjusting to less than
(1) The first layer and the second layer are made of wood.
(2) The thickness of the first layer is less than 1.0 mm,
(3) The specific gravity of the second layer is greater than the specific gravity of the first layer,
(4) The specific gravity of the first layer is less than 0.50.
The manufacturing method of the plywood characterized by this. - 少なくとも上から順に第1層及び第2層を有する合板の製造方法であって、
(I)前記第1層として気乾比重0.40以上0.47以下のポプラ単板、及び、前記第2層として気乾比重0.50以上0.90以下のユーカリ単板を用意する工程1、
(II)前記第1層と前記第2層とを積層する工程2、並びに、
(III)前記工程2の後に、前記第1層の表面を研磨して、前記第1層の厚みを1.0mm未満に調整する工程3を有する、
ことを特徴とする合板の製造方法。
A method for producing a plywood having a first layer and a second layer in order from at least the top,
(I) A step of preparing a poplar single plate having an air-dry specific gravity of 0.40 to 0.47 as the first layer and a eucalyptus single plate having an air-dry specific gravity of 0.50 to 0.90 as the second layer. 1,
(II) Step 2 of laminating the first layer and the second layer, and
(III) After the step 2, the step of polishing the surface of the first layer to adjust the thickness of the first layer to less than 1.0 mm,
The manufacturing method of the plywood characterized by this.
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JP7515920B2 (en) | 2020-02-19 | 2024-07-16 | 株式会社ユニウッドコーポレーション | Structural laminated veneer lumber and its manufacturing method |
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JP2022131290A (en) * | 2021-02-26 | 2022-09-07 | 後藤木材株式会社 | Laminated plasticity lumber |
Also Published As
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KR20180134404A (en) | 2018-12-18 |
JP7180594B2 (en) | 2022-11-30 |
CN109414834A (en) | 2019-03-01 |
CN109414834B (en) | 2021-12-24 |
JPWO2018225845A1 (en) | 2020-04-23 |
KR102032308B1 (en) | 2019-10-15 |
CN208858101U (en) | 2019-05-14 |
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