JP5593290B2 - Wooden decorative board and method for producing the same - Google Patents

Description

  The present invention relates to a wooden decorative board used for building interior materials, furniture, and the like, and more particularly to a wooden decorative board having a grain and a groove in order to improve the design of the surface of the wooden board material.

  A wood veneer that looks like a solid board or an extremely thick veneer is bonded to a thin veneer with a design such as grain or color on the surface of a wood substrate with a thickness such as plywood or thick veneer. Manufactured. Moreover, what improved the designability by processing the cutting groove on the surface of this wooden decorative board is also manufactured. Further, there is a type in which the cutting groove is formed at a depth reaching the wood substrate, and the surface is further changed so that the wood substrate appears intentionally from the cutting groove portion.

  However, since the thin single plate is very thin, there is a problem that the thin single plate is broken during the cutting process and the design properties of the cutting groove are lowered. In addition, when the cutting groove is formed at a depth that reaches the wood substrate, the thin single plate on the surface is more easily broken, and the wooden substrate appears unnaturally from the portion of the cut groove, which impairs the design of the wood decorative board. There was a problem of low product value.

  Therefore, a single-plate-attached decorative board in which a thin single plate dyed in the same color as the thin single plate is interposed as an intermediate layer between the wooden substrate and the thin single plate on the surface is proposed in Patent Document 1 below. In this woody decorative board, even if the cut groove part is cracked, the crack is not noticeable in the intermediate layer dyed in the same color as the thin single board on the surface.

  Further, a wood decorative board for cutting at a depth from the surface layer side to the intermediate layer by crossing the fiber directions of the grain of the intermediate layer thin veneer and the surface layer thin veneer by the inventor of the present invention 2 is proposed. In this wood decorative board, a large change appears between the appearance of the surface layer and the appearance of the cutting part, and the impression received from the whole wood decorative board has a high design property exceeding that of a solid board or a very thick single board. doing.

Japanese Utility Model Publication No. 6-16004 Utility Model Registration No. 3167413

  By the way, the wooden decorative board of the said patent document 1 and the said patent document 2 is excellent in design property, is used extensively for a building interior material, furniture, etc., and is widely used also for a wall material and a flooring. However, the surface layer and the intermediate layer constituting these wooden decorative boards are made of a thin single plate, and as described above, are easily broken during cutting and have low dimensional stability against changes in moisture content. When such a wood decorative board is used for a wall material or a flooring material, an irregularity such as warping or twisting occurs as compared with a solid board or a thick board, and the surface layer or intermediate layer peels off and appears as a crack. In particular, when used for flooring, there are problems that the flooring is pushed up and gaps occur due to environmental changes between high water content and low water content, and that surface scratches, dents and cracks are likely to occur. was there.

  Therefore, the present invention addresses the above and has a high degree of dimensional stability against changes in moisture content, so that the surface layer and the intermediate layer are not peeled off or cracked due to deviations such as warping and twisting. In addition, there are no problems due to the rise of the wooden decorative boards due to the change in moisture content or the occurrence of gaps, surface scratches, dents and cracks are less likely to occur. It aims at providing the manufacturing method.

  In solving the above problems, the present inventors, as a result of earnest research, in the case where a surface layer and an intermediate layer to be laminated on a wooden substrate are present, a high degree of dimensional stabilization treatment is applied to the thin single plate constituting the intermediate layer. It has been found that the above-mentioned object can be achieved by laminating the films and then completing the present invention.

That is, the manufacturing method of the wood decorative board according to the present invention, according to the description of claim 1,
In the manufacturing method of the wooden decorative board formed by laminating the wooden substrate and the surface layer made of a thin single plate,
A dimensional stabilization process for applying a dimensional stabilization process to the wood material constituting the surface layer;
A laminating step of laminating the wood substrate and the surface layer after the dimension stabilizing treatment step;
The later lamination process possess a cutting step of forming a cutting portion which is cut from the side of said surface layer,
The dimension stabilization treatment includes a first component composed of an addition product of a cyclic urea compound and glyoxal,
A treatment liquid containing a second component consisting of 4,5-dihydroxy-2-imidazolidinone or a derivative thereof,
Characterized Rukoto the first component and the second component are reacted cured in the woody material impregnated with wooden materials constituting the surface layer.

  According to the said structure, the wooden decorative board has the cutting site | part cut from the surface layer side, a change is given to the surface of a wooden decorative board, and the designability improves. Here, the wood material constituting the surface layer is subjected to dimensional stabilization treatment. This improves the dimensional stability of the surface layer against changes in moisture content.

  On the other hand, the wooden substrate is made of a material that is inherently stable in dimensional change, such as a solid board, a plywood board, a thick single board, and a particle board. As a result, the dimensional change of the surface layer laminated on the wooden board becomes extremely small, so that the dimensional stability of the whole wooden decorative board is improved. This prevents the surface layer from being peeled off or cracked due to a deviation such as warping or twisting in the wooden decorative board.

Further , according to the above configuration, the first component composed of the addition product of the cyclic urea compound and glyoxal impregnated in the wood material constituting the surface layer is 4,5-dihydroxy-2-imidazolidinone or the same. The reaction product is cured by reaction with the second component made of the derivative, and the reaction product is filled into the cell lumen, cell space, and cell wall of the woody material.
Thereby, the strength of the wood material constituting the surface layer is improved, the surface is cured, and the surface strength is also improved. Furthermore, even when a cutting site is provided in a surface layer made of a thin single plate, this portion is less likely to crack. As a result, even when this wooden decorative board is used as a flooring material, there is no problem due to the pushing up of the wooden decorative boards due to the change in the moisture content or the occurrence of gaps, and it is difficult for surface scratches, dents and cracks to occur.
As a result, even when using a wooden decorative board laminated with this surface layer as a flooring, there will be no problems due to the rise of the wooden decorative boards and the occurrence of gaps due to the change in moisture content, and scratches, dents, cracks on the surface Is less likely to occur.
In addition, the second component composed of 4,5-dihydroxy-2-imidazolidinone or a derivative thereof impregnated in the wood material constituting the surface layer may crosslink between cellulose molecules constituting the cell wall of the wood material. have.
As a result, the strength of the cell wall of the wood material constituting the surface layer is improved, and the dimensional stabilization of the wood material against changes in the moisture content is further achieved. This prevents the surface layer from being peeled off or cracked due to a deviation such as warping or twisting in the wooden decorative board.
Furthermore, the first component and the second component do not leave any stickiness on the surface of the wood material due to unreacted substances, and do not cause discoloration such as yellowish browning due to light. Thereby, it can also be utilized as a main purpose for the anti-discoloration property by the light of a wooden decorative board.

  Therefore, according to the first aspect of the present invention, it has a high degree of dimensional stability with respect to a change in moisture content, and does not cause peeling or cracking of the surface layer due to a deviation such as warping or twisting, and is due to a change in moisture content. It is possible to provide a method for producing a wood decorative board having high design characteristics and high commercial value, without causing problems due to the pushing up of the wooden decorative boards and the occurrence of gaps, and hardly causing scratches or dents on the surface. .

Moreover, according to the description of Claim 2, this invention is the manufacturing method of the wooden decorative board of Claim 1,
The cutting part is cut at a depth from the surface layer side to the wood substrate.

  According to the said structure, the cutting site | part formed in the surface of a wooden decorative board is cut by the depth which reaches a wooden board | substrate. As a result, the wood material constituting the wood substrate appears in the appearance of the cut part, and the change in the surface of the wood decorative board is increased, and the design is further improved.

  Here, the wood material constituting the surface layer is subjected to the dimensional stabilization treatment as described above. As a result, the surface layer has improved dimensional stability against changes in moisture content, and therefore the invention described in claim 2 can achieve the same effects as those of the invention described in claim 1.

Moreover, according to the description of claim 3, the manufacturing method of the wooden decorative board according to the present invention,
A wooden decorative board formed by laminating a wooden substrate (11, 21), an intermediate layer (12, 22) made of at least one thin single plate, and a surface layer (13, 23) made of another thin single plate. In the manufacturing method of (10, 20),
A dimensional stabilization treatment step for subjecting the wood material constituting the intermediate layer and the surface layer to a dimensional stabilization treatment;
A laminating step of laminating the wood substrate, the intermediate layer, and the surface layer after the dimension stabilizing treatment step;
Possess a cutting step of forming a cutting portion which is cut at a depth not exceeding the intermediate layer together after the laminating step from the side of the surface layer reaches to the intermediate layer (14, 24),
The dimension stabilization treatment includes a first component composed of an addition product of a cyclic urea compound and glyoxal,
A treatment liquid containing a second component consisting of 4,5-dihydroxy-2-imidazolidinone or a derivative thereof,
Characterized Rukoto the first component and the second component are reacted cured by woody material and impregnating the wood material forming the intermediate layer the wood material constituting the surface layer.

  According to the above configuration, the wooden decorative board has a thin single plate constituting the intermediate layer, and this thin single plate is interposed between the wooden substrate and another thin single plate constituting the surface layer. ing. Moreover, the wood decorative board has a cutting part cut from the surface layer side, and this cutting part reaches the intermediate layer and is cut at a depth not exceeding the intermediate layer. As a result, a thin single plate constituting the intermediate layer appears in the appearance of the cutting site.

  The thin single plate constituting the intermediate layer may be one sheet or two or more sheets. When the intermediate layer is formed of two or more thin single plates, the depth of each cutting site can be changed to a depth reaching a thin single plate having a different intermediate layer. Thereby, a thin veneer with a different intermediate layer appears on the appearance of each cutting site, and the design of the wood decorative board can be enhanced.

Here, the wood material constituting the surface layer and the intermediate layer is subjected to the same dimensional stabilization treatment as described in the first aspect . As a result, both the surface layer and the intermediate layer have improved dimensional stability against changes in moisture content. As a result, the dimensional change of the intermediate layer laminated on the wooden substrate and the surface layer laminated on the intermediate layer are both extremely small, and the dimensional stability of the whole wooden decorative board is improved. This prevents the surface layer or intermediate layer from being peeled off or cracked due to a deviation such as warping or twisting in the wooden decorative board.

  Further, the strength of the wood material constituting the surface layer and the intermediate layer is improved, the surface is cured, and the surface strength is also improved. Furthermore, even when a cutting site is provided on a surface layer or an intermediate layer made of a thin single plate, this portion is less likely to crack. As a result, even when this wooden decorative board is used as a flooring material, there is no problem due to the pushing up of the wooden decorative boards due to the change in the moisture content or the occurrence of gaps, and it is difficult for surface scratches, dents and cracks to occur.

  Therefore, according to the invention described in claim 3, it has a high degree of dimensional stability with respect to a change in the moisture content, and the surface layer and the intermediate layer are not peeled or cracked due to a deviation such as warping or twisting, and the moisture content Providing a method for producing a wood decorative board having high design and high product value, which is free from defects caused by the rise of the wooden decorative boards due to the change of the surface and the occurrence of gaps, is less likely to cause scratches and dents on the surface. be able to.

Moreover, this invention is the manufacturing method of the wooden decorative board as described in any one of Claims 1-3 according to description of Claim 4 ,
In the dimension stabilization treatment, in addition to the first component and the second component, a treatment liquid containing a third component made of glycols is used.
When the wood material constituting the surface layer and the intermediate layer are present, the wood material constituting the intermediate layer is impregnated and the third component reacts with the first component and the second component in the wood material. It is characterized by being cured.

  According to the said structure, in addition to a 1st component and a 2nd component, you may make it add the 3rd component which consists of glycols. This third component reacts and cures together with the first component and the second component described above, and when the reaction product includes the wood material constituting the surface layer and the intermediate layer, the wood material constituting the intermediate layer is present. It fills the cell lumen, cell space and cell wall (this is called the bulking effect). As a result, when the wood material and the intermediate layer constituting the surface layer are present, the strength of the wood material constituting the intermediate layer is improved, and the surface of the wood material is cured to improve the surface strength. Further, the dimensional stability of the wood material against the change in the moisture content can be achieved.

Therefore, also in the invention described in claim 4 , it is possible to further achieve the same effect as the invention described in any one of claims 1 to 3 .

Moreover, this invention is the manufacturing method of the wooden decorative board as described in any one of Claims 1-4 according to the description of Claim 5 ,
The first component comprises an addition product of 2-imidazolidinone and glyoxal, and is characterized by adding 0.9 mol to 1.2 mol of glyoxal to 1 mol of 2-imidazolidinone. To do.

  According to the said structure, the addition product of the 1st component has added 2-component 2-imidazolidinone and glyoxal in the ratio close | similar to equimolar number. That is, it is limited to the range of 0.9 mol to 1.2 mol of glyoxal with respect to 1 mol of 2-imidazolidinone.

  Therefore, in the addition product produced | generated from this reaction, possibility that the both ends of the molecule | numerator will be comprised from a different component becomes high. Therefore, when the wood material and the intermediate layer in which the molecules of the first component constitute the surface layer exist, there are many opportunities for causing a self-polymerization reaction in the wood material constituting the intermediate layer. As a result, the degree of polymerization of the polymer filled in the cell lumen, cell gap and cell wall of the wood material is increased, and the strength improvement and dimensional stabilization of the wood material due to the filling effect are further improved.

Therefore, also in the invention according to the fifth aspect , the same effect as the invention according to any one of the first to fourth aspects can be achieved more specifically.

Moreover, this invention is a manufacturing method of the wooden decorative board as described in any one of Claims 1-5 according to description of Claim 6 , Comprising:
The second component is 1,3-dimethyl-4,5-dihydroxy-2-imidazolidinone, 1,3-bis (hydroxymethyl) -4,5-dihydroxy-2-imidazolidinone, 1,3- It is characterized by comprising at least one selected from the group consisting of bis (hydroxyethyl) -4,5-dihydroxy-2-imidazolidinone.

  According to the above configuration, the second component is preferably a specific derivative of 4,5-dihydroxy-2-imidazolidinone. That is, a compound in which a methyl group, a hydroxymethyl group, or a hydroxyethyl group is added to the two nitrogen atoms at the 1-position and the 3-position in the 4,5-dihydroxy-2-imidazolidinone molecule is preferable. Further, the second component may be a blend of these derivatives.

  These second components have a high reactivity with the cellulose molecules constituting the cell walls of the wood material constituting the intermediate layer when the wood material and the intermediate layer constituting the surface layer are present, and between the cellulose molecules. Crosslinks strongly. Also, the polymer of the first component or the polymer of the first component and the third component reacts well to cross-link between the polymers, or cross-link between the polymer and cellulose molecules constituting the cell wall. . As a result, when the wood material and intermediate layer constituting the surface layer are present, the strength of the wood material constituting the intermediate layer is further improved, and when the surface layer and intermediate layer are present, the intermediate material is enhanced. Dimensional stabilization of the wood decorative board in which the layers are laminated is further achieved.

Therefore, also in the invention described in claim 6 , the same effect as the invention described in any one of claims 1 to 5 can be achieved more specifically.

Moreover, according to the description of Claim 7 , this invention is a manufacturing method of the wooden decorative board as described in any one of Claims 1-6 ,
When the wood material constituting the surface layer and the intermediate layer are present, the wood material constituting the intermediate layer is subjected to a dyeing process or a bleaching process in the dimension stabilizing treatment process or in another process. It is characterized by.

  According to the said structure, when the wood material and intermediate | middle layer which comprise a surface layer exist, the dyeing process or the bleaching process is made | formed to the wood material which comprises the said intermediate | middle layer. Here, when there is no intermediate layer, it is preferable that the surface layer and the wood substrate have different colors (including white by bleaching, the same applies hereinafter). As a result, when a cutting part from the surface layer side to the wooden substrate is formed toward the wooden substrate having a color different from that of the surface layer, the color of the wooden substrate appears in the appearance of the cutting part.

  Further, when an intermediate layer is present, it is preferable that the surface layer and the intermediate layer have different colors. Thus, when an intermediate layer having a color different from that of the surface layer is interposed between the wood substrate and the surface layer, and a cutting site from the surface layer side to the intermediate layer is formed, the appearance of this cutting site is determined by the intermediate layer. The color of the thin veneer that constitutes.

  As described above, the color of the wood substrate or the intermediate layer is different from the color of the surface layer, so that the wood grain of the surface layer of the wood decorative board and the wood grain of the wood substrate or the intermediate layer seen at the cutting site are in the same direction. Also, a high degree of design is expressed on the surface of the wooden veneer. Furthermore, when the intermediate layer is present and the intermediate layer is formed of two or more thin single plates, the depth of each cutting site is changed to the depth to reach a different thin single plate of the intermediate layer. In addition, different colors of the intermediate layer appear in the appearance of each cutting part, and the design of the wood decorative board is further improved.

Therefore, in the invention described in claim 7 , the same effect as the invention described in any one of claims 1 to 6 is achieved, and it has a higher degree of design and has a high commercial value. A method for producing a wooden decorative board can be provided.

Also, the wood veneer according to the present invention, according to the description of claim 8, characterized in that it is manufactured by the manufacturing method of the wood veneer according to any one of claims 1-7.

  According to the above configuration, the wood decorative boards have a high degree of dimensional stability with respect to changes in moisture content, do not cause peeling or cracking of the surface layer or intermediate layer due to inaccuracy such as warping or twisting, and wood decorative boards due to changes in moisture content Thus, there is no problem due to the pushing up or the generation of gaps, and it is difficult to cause scratches, dents or cracks on the surface, and it is possible to provide a wood decorative board having high design properties and high commercial value.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means as described in each Example mentioned later.

It is a top view which shows the wooden decorative board of Example 1. FIG. In FIG. 1, it is a cross-sectional view along the line XX ′. It is a top view which shows the woody decorative board of Example 2. In FIG. 2, it is a longitudinal cross-sectional view along the YY 'line. It is a top view which shows the other example of the wooden decorative board which concerns on this invention.

  In the present invention, any wood substrate may be used. For example, solid board, plywood, thick single board, particle board, MDF (Medium Density Fiber), or LVL (Laminated Veneer Number) may be used alone or in combination. Moreover, although the thickness of a wooden board | substrate may be arbitrary, for example, about 1 mm-40 mm may be sufficient.

  In the present invention, when the intermediate layer is formed, any material can be used as the thin single plate constituting the intermediate layer, and a stripping device such as a rotary lace or a slicer can be used. A thin single plate sliced to an arbitrary thickness may be used. Further, the tree species may be any of conifers, hardwoods, etc., and for example, cedar, cypress, pine, lawan, mahogany, bubinga, zebrawood, etc. may be used.

  Although the thickness of the thin single plate which comprises an intermediate | middle layer may be arbitrary, For example, about 0.3 mm-5 mm are preferable and about 1 mm-3 mm are more preferable. In addition, when the intermediate layer is composed of two or more thin single plates, a wood decorative board with a change in design is constructed by combining different tree species, colors, fiber direction of wood grain, grain pattern and mesh pattern, etc. can do. In addition, the thin single plate constituting these intermediate layers is subjected to a dimensional stabilization process. Further, if necessary, a dyeing process or a bleaching process may be performed. In addition, a dimension stabilization process, a dyeing process, and a bleaching process will be described later.

  In the present invention, any material may be used as the material of the thin single plate constituting the surface layer. For example, as in the case of the intermediate layer, any thickness can be obtained using a scraping device such as a rotary lace or a slicer. It is sufficient to use a thin veneer sliced into two pieces. The tree species may be either broad-leaved trees or coniferous trees, but those having excellent surface design are used. For example, hippo, sen, oak, zelkova, teak, walnut, tamo, mahogany, sycamore, bubinga, zebrawood or cedar, cypress may be used.

  Although the thickness of the thin single plate which comprises a surface layer may be arbitrary, when an intermediate | middle layer exists, it comprises less than the said intermediate | middle layer. For example, it may be about 0.2 mm to 0.7 mm, but is preferably about 0.45 mm in order to prevent the underlying wooden substrate or intermediate layer from being seen through. In addition, the above-mentioned dimension stabilization process is performed also on the thin single plate which comprises these surface layers. Further, if necessary, a dyeing process or a bleaching process may be performed.

  Furthermore, the thin veneer constituting the intermediate layer and the thin veneer constituting the surface layer are the same tree species by changing the color, thickness, fiber direction of the grain, grain pattern and square pattern, or different tree species. By combining color, thickness, fiber direction of wood grain, and grain and grid, it is possible to construct a wood decorative board having a change in design.

  Here, the color of the thin veneer means a combination of colors represented by the thin veneer, coloring, and hue, which are different in hue, saturation, brightness, and the like, and change design properties. In the present invention, as described above, white by bleaching is also included in the color. Therefore, natural wood may be used in its natural color, or may be processed into an arbitrary color by a dyeing process or a bleaching process.

  Moreover, in the lamination process of the wooden decorative board according to the present invention, any method may be used for adhesion between the wooden board and the thin veneer, and adhesion between the thin veneers. For example, a urea resin system, a vinyl acetate resin system, a phenol resin system, an aqueous vinyl urethane resin system having a low cohesive force, or an SBR resin system may be used for bonding with an apparatus such as a pressure press.

  Further, in the cutting process of the wood decorative board according to the present invention, a normal wood cutting device using NC router, CAM (Computer Aided Manufacturing) or the like is used as the cutting means of the cutting part from the surface layer side to the intermediate layer. Use and cut. These cutting conditions may be set arbitrarily. For example, each cutting condition can be set according to the pattern of the cutting site, the width and length of the line or groove, and the cutting depth.

  Here, as the pattern of the cutting part, there are a checkered pattern, a neckline pattern, a whirl pattern, a kamakura pattern, a band saw pattern, a circular saw pattern, a polka dot pattern, a vertical stripe, a horizontal stripe, and the like.

  On the other hand, in the present invention, the dimension stabilization treatment step may be performed by a method used in ordinary wood processing. For example, resin impregnation treatment such as glyoxal resin, formalization treatment, acetylation treatment, polyethylene glycol Etc. are used. Moreover, the surface hardness of the woody material can be improved by performing these dimensional stabilization treatments. In particular, when a wooden decorative board is used for a flooring, this surface hardness is important.

  In addition, in the dimension stabilization process of this invention, sufficient surface hardness of a woody material can be obtained by performing the dimension stabilization process by the resin prescription shown below. The prescription will be described below.

  In the present invention, the addition product of the cyclic urea compound and glyoxal constituting the first component of the treatment liquid is, for example, at least one of a plurality of nitrogen atoms of various cyclic urea compounds such as a 5-membered ring or a 6-membered ring. This is a general term for compounds in which glyoxal is added. In particular, in the present invention, an addition product of 2-imidazolidinone and glyoxal represented by the following chemical formula 1 is preferably used.

  In Formula 1, n is an integer of 1 or more, one imino group of 2-imidazolidinone reacts with one aldehyde group of glyoxal, and 2-imidazolidinone and glyoxal alternately repeat polyaddition. An initial polymer is formed.

  The structure of both terminals of this initial polymer can be adjusted by changing the ratio of the number of moles of glyoxal added to 2-imidazolidinone. For example, if 2-imidazolidinone is used more than glyoxal, there are more imino groups of 2-imidazolidinone at both ends of the initial polymer, while glyoxal is used more than 2-imidazolidinone. For example, many aldehyde groups of glyoxal are present at both ends of the initial polymer.

  Here, the ratio of the number of moles of glyoxal added to 2-imidazolidinone may be any, but in the present invention, 0.9 mole of glyoxal is used per mole of 2-imidazolidinone. An initial polymer obtained by adding ~ 1.2 mol is preferred. In this way, by adjusting the ratio of the number of moles of 2-imidazolidinone and glyoxal to the same degree, a large amount of initial polymer having both imino groups and aldehyde groups at both ends as shown in Chemical Formula 1 can be prepared. Is done. As a result, the initial polymer constituting the first component is easily self-polymerized in the cell lumen, cell gap and cell wall of the woody material, and as a result, it is filled as a higher molecular weight resin.

  Next, in the present invention, 4,5-dihydroxy-2-imidazolidinone or a derivative thereof constituting the second component of the treatment liquid is 4,5-dihydroxy-2-imidazolidinone shown in Chemical Formula 2 below. Itself,

And a generic term for compounds in which the hydrogen atoms of two imino groups of 4,5-dihydroxy-2-imidazolidinone are substituted with other groups. In particular, in the present invention, 1,3-dimethyl-4,5-dihydroxy-2-imidazolidinone, 3-bis (hydroxymethyl) -4,5-dihydroxy-2-imidazolidinone, 1,3-bis It is preferable to use at least one derivative selected from the group consisting of (hydroxyethyl) -4,5-dihydroxy-2-imidazolidinone.

  First, the structural formula of 1,3-dimethyl-4,5-dihydroxy-2-imidazolidinone is shown in Chemical Formula 3 below.

  In Chemical Formula 3, the hydroxyl groups at the 4th and 5th positions are reactive with cellulose molecules constituting the cell wall of the woody material, and a cross-linked structure is formed between these cellulose molecules to improve the strength and dimension stabilization of the cell wall. Contribute. These hydroxy groups also react with the high molecular weight resin obtained by self-polymerization of the initial polymer of Chemical Formula 1 to bond the cell wall with the resin filled in the cell lumen, cell space and cell wall of the wood material. Also plays a role. This improves the strength of the cell wall of the wood material and fills the cell lumen, cell gap and cell wall, and achieves good dimensional stability and surface hardening of the wood material.

  Next, the structural formula of 1,3-bis (hydroxymethyl) -4,5-dihydroxy-2-imidazolidinone is shown in the following chemical formula 4.

  In the chemical formula 4, the hydroxymethyl groups at the 1-position and the 3-position are very highly reactive with the cellulose molecules constituting the cell wall of the woody material, form a strong cross-linked structure between the cellulose molecules, and improve the strength of the cell wall. Greatly contributes to dimensional stabilization. The hydroxyl groups at the 4th and 5th positions are also reactive with cellulose molecules, and form a crosslinked structure between the cellulose molecules. Furthermore, these hydroxymethyl groups or hydroxy groups react with the high molecular weight resin obtained by self-polymerization of the initial polymer of Chemical Formula 1, and the resin filled in the cell lumen, cell space and cell wall of the woody material. It also plays a role in connecting cell walls. This improves the strength of the cell wall of the wood material and fills the cell lumen, cell gap and cell wall, and achieves good dimensional stability and surface hardening of the wood material.

  Next, the structural formula of 1,3-bis (hydroxyethyl) -4,5-dihydroxy-2-imidazolidinone is shown in Chemical Formula 5 below.

  In Chemical Formula 5, the 1- and 3-position hydroxyethyl groups are reactive with cellulose molecules constituting the cell wall of the woody material, and form a cross-linked structure between the cellulose molecules to improve the strength and dimensional stability of the cell wall. A big contribution. The hydroxyl groups at the 4th and 5th positions are also reactive with cellulose molecules, and form a crosslinked structure between the cellulose molecules. Further, these hydroxyethyl groups or hydroxy groups react with the high molecular weight resin obtained by self-polymerization of the initial polymer of Chemical Formula 1, and the resin filled in the cell lumen, cell space and cell wall of the wood material It also plays a role in connecting cell walls. This improves the strength of the cell wall of the wood material and fills the cell lumen, cell gap and cell wall, and achieves good dimensional stability and surface hardening of the wood material.

  Next, in the present invention, the glycols constituting the third component of the treatment liquid are dihydric alcohols such as ethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, 1,3- Various things such as butylene glycol, trimethylene glycol, hexamethylene glycol and the like can be used. In the present invention, monoethers of the above glycols are also included as long as they have hydrophilicity.

  In particular, in the present invention, an alkylene glycol having an alkyl group having 3 to 8 carbon atoms is preferable as the glycol, and among them, dipropylene glycol is more preferable.

  When these glycols are used together as the third component of the treatment liquid, the hydroxy group of the glycols reacts with the aldehyde group of the first component or the hydroxy group, hydroxymethyl group, hydroxyethyl group of the second component, It will contribute to the crosslinking effect.

  Further, in the present invention, even when glycols are used in combination, stickiness due to unreacted substances does not remain because the first component and the second component are contained.

  A catalyst is used in combination for each reaction of the first component, the second component, and the third component. As the catalyst, a protonic acid or a Lewis acid is used. For example, zinc chloride, magnesium chloride, phosphoric acid, paratoluenesulfonic acid, various organic amine hydrochlorides, and the like can be used. The type and amount of these catalysts are appropriately adjusted depending on the reaction temperature and reaction time.

  Next, a method for treating the wood material constituting the surface layer and the intermediate layer in the dimension stabilization treatment step will be described according to each stage. In addition, the shape of the wood material to be processed may be any shape, and may be processed after processing into a thin single plate constituting the surface layer and the intermediate layer, or after processing the plate material and the column material. It may be processed into a thin single plate.

A. Processing liquid adjustment step The processing liquid is adjusted by blending the first component, the second component and the catalyst described above. Moreover, a 3rd component is mix | blended as needed. All of these components, including the initial polymer of the first component, are water-soluble substances having many hydrophilic groups, and the treatment liquid is preferably an aqueous solution. Moreover, you may mix | blend some solvents other than water, for example, alcohols, such as isopropyl alcohol, with a process liquid as needed. In the case where the treatment liquid is an aqueous solution, a drying treatment or a cleaning treatment performed if necessary becomes easy, and the working environment is also improved.

  The amount of each component to be applied to the wood material may be adjusted as appropriate depending on the type and shape of the wood material and the application to be used, but the rate of weight increase relative to the absolute dry weight of the wood material due to the solid content of the reaction resin after the reaction described below Is preferably in the range of 8% to 80%. When the solid content of the reaction resin applied to the wood material is within the above range, the cellular material is filled into the cell lumen, cell gaps and cell walls, and the cellulose molecules constituting the cell wall are sufficiently crosslinked. Is called. As a result, the dimensional stability of the wooden material is sufficiently achieved, and the surface hardening is increased in proportion to the rate of weight increase.

  On the other hand, the blending ratio of each component in the treatment liquid may be adjusted as appropriate according to the type and shape of the wood material and the intended use. For example, in the case of a treatment liquid in which the first component and the second component are blended, the first component is preferably 1 in terms of solid content ratio (weight ratio), and the second component is preferably in the range of 3 to 6, More preferably, the second component is in the range of 4-5. Moreover, when mix | blending a 3rd component with this process liquid, when the 1st component is set to 1 by a solid content ratio (weight ratio), a 2nd component exists in the range of 3-6, and a 3rd component is 2 The second component is preferably in the range of 4 to 5, and the third component is more preferably in the range of 3.5 to 4.5. .

  When the mixing ratio of each component in the treatment liquid is within the above range, the wood material is filled into the cell lumen, cell gap and cell wall, cross-linked between cellulose molecules constituting the cell wall, and the polymer of the first component Or the bridge | crosslinking between the polymers of a 1st component and a 3rd component and the bridge | crosslinking between the said polymer and the cellulose molecule which comprises a cell wall can be performed more efficiently.

B. Treatment liquid impregnation stage The wood material is impregnated with the treatment liquid prepared in the treatment liquid adjustment stage. The impregnation method is a method used in various treatments of wood materials, such as normal pressure treatment methods such as coating method, spraying method, dipping method, hot and cold bath method, vessel method, rubing method, lorry method, dry method. There are pressure treatment methods such as an injection method, a pressure injection method, and a vacuum injection method. In the present invention, the reduced pressure / pressurized alternating method (OPM method) is preferable in order to sufficiently impregnate the treatment solution into the cell lumen, the cell gap and the cell wall through the wood material.

  Specifically, after the wood material is loaded into a pressure vessel which is an impregnation device, the inside of the device is depressurized to deaerate the air present in the cell lumen, cell gap and cell wall of the wood material. Thereafter, the treatment liquid is supplied into the apparatus under reduced pressure, and the wood material is immersed in the treatment liquid. Next, by pressurizing the inside of the apparatus stepwise and maintaining the pressurized state for a predetermined time, the treatment liquid can be sufficiently impregnated into the cell lumen, the cell gap and the cell wall of the woody material.

  The amount of impregnation of the treatment liquid into the wood material varies depending on the content of each component in the treatment liquid and the amount of voids in the wood material, but in the present invention, usually 60% to 400% with respect to the weight of the wood material. It is preferable to be within the range.

  In this impregnation stage, even when the treatment liquid contains a catalyst, the reaction of each component does not proceed, and the reactivity of the treatment liquid remains. As a result, the treatment liquid remaining in the impregnation apparatus without being impregnated into the cell lumen, cell gap and cell wall of the woody material can be recovered and reused in the next impregnation stage.

C. Reaction stage The wood material impregnated with the treatment liquid is taken out of the impregnation apparatus and sufficiently dried in the drying apparatus. Since drying is usually performed within a range of 40 ° C. to 90 ° C., the reaction of each component does not occur at the stage of 90 ° C. or less. The wood material is dried according to a kiln dry drying schedule from raw materials according to the tree species and dimensions. It can also be dried by heating in a vacuum state.

  Next, the dried wood material is heat-treated in a heat treatment apparatus, and the reaction of each component proceeds. The conditions for the heat treatment may be appropriately selected depending on the shape of the wood material, the type of each component, the type of reaction catalyst, and the amount used. For example, in the case of a plate material having a thickness of about 1 mm to 20 mm, the temperature is 110 ° C. to 160 ° C. The reaction is carried out in minutes to 30 minutes.

  By this reaction, the first component in the treatment liquid is self-polymerized and filled into the cell lumen, cell gap and cell wall of the wood material, and the second component cross-links between the cellulose molecules on the cell wall to form the wood material. Improve cell wall strength. Moreover, the resin in which the first component is self-crosslinked, the second component, and the third component react to further achieve dimensional stability and surface hardening of the wood material.

  In the present invention, the dyeing process may be carried out by a method used in ordinary wood processing, and is generally performed by immersing in a dyeing bath at 80 ° C. to 95 ° C. for several tens of minutes to several hours. Moreover, in this invention, resin processing and dyeing | staining can also be processed simultaneously in the processing bath of the said dimension stabilization process. Here, as a dye used for the dyeing treatment, any dye can be used as long as it is a dye dyed on a wooden material, but it is generally preferable to use an acid dye or the like.

  When the dyeing process is simultaneously performed in the treatment liquid impregnation stage, it is preferable to increase the treatment temperature in order to dye the dye into the woody material. In the case of dyeing with an acid dye, the treatment temperature is preferably in the range of 60 ° C to 95 ° C, and more preferably in the range of 70 ° C to 90 ° C. Even when the temperature is raised in the impregnation stage and the catalyst is contained in the treatment liquid, the reaction of each component does not proceed, and the reactivity of the treatment liquid remains.

  In the present invention, the bleaching step may be performed by a method used in ordinary wood processing, and is generally performed by immersing in a bleaching bath at 15 ° C. to 30 ° C. for several tens of minutes to several hours. Alternatively, in the case of a thin single plate, the surface may be bleached by brushing a bleaching solution. In the present invention, a bleaching process may be performed before the dimension stabilization process. As a bleaching agent used for this bleaching treatment, hydrogen peroxide water or the like is generally used.

  Hereinafter, the wood decorative board and the manufacturing method thereof according to the present invention will be described with reference to respective examples. First, the dimension stabilization process and the dyeing | staining process of the wood material which comprises the surface layer and intermediate | middle layer which comprise the woody decorative board of the present Example 1 are demonstrated.

  As the cedar material of the intermediate layer, a thin plate material obtained by slicing white hand cedar plate material with a slicer to a thickness of 3 mm of the intermediate layer was used. The treatment liquid is 104 g / liter of an aqueous solution (solid content: 40% by weight) of a compound obtained by reacting 2-imidazolidinone and glyoxal as equimolar numbers as the first component, and 1,3-bis as the second component. An aqueous solution (solid content: 40% by weight) of (hydroxyethyl) -4,5-dihydroxy-2-imidazolidinone and 470 g / liter of an aqueous magnesium chloride solution (solid content: 25% by weight) as a catalyst were 99 g / liter. An aqueous solution containing was prepared.

  In Example 1, the dyeing process was processed at the same time as the dimension stabilization process. Therefore, 1.0 wt% of Kayacyl Yellow GG80 (manufactured by Nippon Kayaku Co., Ltd.), which is an acid dye, and 0.8% of Kayacyl Sky Blue R (manufactured by Nippon Kayaku Co., Ltd.) are acid dyes in the treatment liquid for the above dimensional stabilization treatment. A treatment liquid in which 4% by weight and 0.05% by weight of Kayacyl Rubinol 3GS (manufactured by Nippon Kayaku Co., Ltd.) were used was used.

  A cedar thin plate material was loaded into the impregnation apparatus, and the interior of the impregnation apparatus was maintained at a reduced pressure of 25 mmHg for 120 minutes. Then, the said process liquid was supplied in the impregnation apparatus, maintaining the pressure-reduced state, the cedar thin board | plate material was immersed in the process liquid, and it heated up to process temperature 80 degreeC. Next, pressurize the interior of the impregnation apparatus to 0.2 MPa and maintain this state for 30 minutes, further pressurize the interior of the impregnation apparatus to 0.4 MPa and maintain this state for 30 minutes. By pressurizing to 0.5 MPa and liquid pressurization for 60 minutes (step liquid pressurization method), the treatment solution containing the dye was impregnated into the cell lumen, cell gap and cell wall of the cedar thin plate material. The amount of impregnation at this time was 330% with respect to the weight of the cedar thin plate material.

  After impregnation, the cedar thin plate material is taken out from the impregnation apparatus, dried in a drying apparatus at room temperature of 50 ° C. and humidity of 60% for 1 day, and subsequently dried in a drying apparatus at room temperature of 60 ° C. and humidity of 50% for 3 days. It was dried for 3 days in a drying apparatus having a final room temperature of 80 ° C. and a humidity of 40%. The dried cedar thin plate material was heat-treated in a 120 ° C. heat treatment apparatus for 30 minutes to react each component, and to react and cure the first component and the second component. The filling amount of the resin by this reaction was 71% with respect to the absolute dry weight of the cedar thin plate material. In this way, a cedar thin plate material having a thickness of 3 mm, which was dyed blue-green together with the dimensional stabilization treatment constituting the intermediate layer of the wooden decorative board, was obtained.

  On the other hand, a thin plate material obtained by slicing a birch plate material with a slicer to a thickness of 0.45 mm with a slicer was used as a cover material for the surface layer. Bleaching was performed by the usual bleaching method described above. Dimensional stabilization treatment and dyeing are performed in the same manner as the above-mentioned cedar thin plate material. As an acid dye to be mixed, 0.5% by weight of Kayacyl Yellow GG80 (manufactured by Nippon Kayaku Co., Ltd.) and Kayacyl Rubinol 3GS (Nipponization) 0.05% by weight was used.

  The filling amount of the resin after the reaction curing of the first component and the second component was 45% with respect to the absolutely dry weight of the birch sheet material. In this way, a 0.45 mm thick birch sheet material was obtained which was dyed in cherry blossom together with the dimensional stabilization treatment that constitutes the surface layer of the wooden decorative board.

  The woody decorative board according to the first embodiment was configured using the turquoise cedar thin plate material and the cherry-colored birch thin plate material that had been subjected to the dimensional stabilization treatment thus obtained. FIG. 1 is a front view of the wooden decorative board 10 according to the first embodiment, and the surface layer 13 and the intermediate layer 12 appearing at the cutting site 14 form a checkered pattern.

  In FIG. 2 showing a cross section of the wooden decorative board 10, the wooden substrate 11 is made of MDF having a thickness of 4 mm, and a cedar material having a thickness of 3 mm constituting the intermediate layer 12 is formed on one surface of the wooden substrate 11. One surface of one thin single plate made of is bonded with a water-based vinyl urethane resin adhesive. As described above, the cedar material is subjected to a dimensional stabilization process and a blue-green dyeing.

  Further, one surface of one thin single plate made of a cover material having a thickness of 0.45 mm constituting the surface layer 13 is water-based vinyl on the other surface of the thin single plate of cedar material constituting the intermediate layer 12. Bonded with urethane resin adhesive. As described above, this birch material has been subjected to dimensional stabilization treatment and cherry-colored dyeing. The other surface of the thin veneer of the cherry-colored birch that forms this surface layer 13 appears on the surface of the wooden decorative board 10. The cherry-colored birch material constituting the surface layer 13 and the blue-green cedar material constituting the intermediate layer 12 are laminated so that the fiber directions of the grain are orthogonal to each other.

  Thus, in the wooden decorative board 10 in which the three layers of the surface layer 13, the intermediate layer 12, and the wooden substrate 11 are laminated, a cutting with a depth of 1.0 mm from the surface layer 13 side to the central portion of the intermediate layer 12 is performed. The site | part 14 is partially formed in the NC router (refer FIG. 2).

  As a result, in the cut portion 14 formed on the cherry-colored surface of the wooden decorative board 10, the turquoise cedar wood constituting the intermediate layer 12 appears with different fiber directions, and the wooden decorative board The checkerboard pattern formed on the surface of 10 expresses a high degree of design by changing the texture of the tree species, the color, the fiber direction of the grain and the unevenness.

  Here, the wooden decorative board obtained in Example 1 was evaluated. As an evaluation item, an excellent door component performance test method (Better Living Foundation) interior door (BLT ID: 2007) was adopted to evaluate the warping and twisting of the wooden decorative board. Moreover, the pencil hardness test (JIS) was employ | adopted and the scratch resistance of the surface of a wooden decorative board was evaluated. Hereinafter, the evaluation result of each test item will be described.

a. Warp Arrow Height Measurement Test (BLT ID-01):
The depth of the concave portion in the diagonal direction of the 909 mm × 1818 mm wood decorative board obtained in Example 1 was within 0.5 mm (standard was within 3 mm), and almost no warping occurred. Moreover, there was no twist and peeling did not occur.

b. Deformation test by water absorption (BLT ID-10):
The depth of the concave portion in the diagonal direction of the 909 mm × 1818 mm wood decorative board obtained in Example 1 was 0.5 mm (the reference is normal for use), and only slight warping occurred. Further, the twist was only 0.5 mm, and no peeling occurred.

c. Pencil hardness test (JIS-K5400):
The wood decorative board obtained in Example 1 withstood a load of 1 kg with a pencil hardness of 6B, showed a good hardness, and was not easily damaged.

  From the above, it has a high degree of dimensional stability with respect to changes in moisture content, and there is no peeling or cracking of the surface layer or intermediate layer due to deviations such as warping or twisting, and between wooden decorative boards due to changes in moisture content It is possible to provide a wood decorative board having a high design value and a high commercial value, and a method for producing the same, without causing problems due to the pushing up and the generation of gaps, hardly causing scratches, dents and cracks on the surface.

  Next, the dimension stabilization process and the dyeing | staining process of the wood material which comprises the surface layer and intermediate | middle layer which comprise the woody decorative board of Example 2 are demonstrated.

  As the cedar material of the intermediate layer, a thin plate material obtained by slicing the cedar plate material with a slicer to a thickness of 3 mm of the intermediate layer was used. In the treatment liquid, an aqueous solution (solid content: 40% by weight) of a compound obtained by reacting 2-imidazolidinone and glyoxal as equimolar numbers as the first component was 62 g / liter, and 1,3-as the second component. An aqueous solution (solid content: 40% by weight) of bis (hydroxymethyl) -4,5-dihydroxy-2-imidazolidinone was 280 g / liter, and dipropylene glycol (100% product) was 93 g / liter as the third component. Then, an aqueous solution containing 93 g / liter of an aqueous magnesium chloride solution (solid content: 25% by weight) as a catalyst was prepared.

  In Example 2, the dyeing process was processed simultaneously with the dimension stabilization process. Therefore, 0.5 wt% of Kayacyl Yellow GG80 (manufactured by Nippon Kayaku Co., Ltd.) and 0.05 of Kayacyl Rubinol 3GS (manufactured by Nippon Kayaku Co., Ltd.), which are acidic dyes, in the treatment liquid of the above-mentioned dimension stabilization treatment. A treatment liquid mixed in weight% was used.

  The treatment liquid impregnation step and the reaction step were performed in the same manner as in the first example. The amount of impregnation in the impregnation step (step liquid pressurization method) was 270% with respect to the weight of the cedar thin plate material. Moreover, the filling amount of the resin in the reaction stage was 60% with respect to the absolute dry weight of the cedar thin plate material. In this way, a cedar thin plate material having a cherry color dyed together with the dimension stabilization treatment was obtained.

  On the other hand, as a cover material for the surface layer, a thin plate material obtained by slicing the cover plate material with a slicer to a thickness of 0.45 mm was used. Bleaching was performed by the usual bleaching method described above. In Example 2, the surface layer was used without being dyed and bleached white. About the dimension stabilization process, it carried out like the above-mentioned cedar board | plate material, and was performed without mixing an acidic dye. The filling amount of the resin in the reaction stage was 45% with respect to the dry weight of the birch sheet material. In this way, a white thin cover material having a thickness of 0.45 mm subjected to the dimensional stabilization treatment constituting the surface layer of the wooden decorative board was obtained.

  A woody decorative board according to Example 2 was configured using the cherry-colored cedar thin board material and white birch thin board material that had been subjected to the dimensional stabilization process thus obtained. FIG. 3 is a front view of the wooden decorative board 20 according to the second embodiment, in which the surface layer 23 and the intermediate layer 22 appearing at the cutting site 24 form a neckline pattern (handaxe cut). Yes.

  In FIG. 4 showing the cross section of the wooden decorative board 20, the wooden board 21 is made of MDF having the same thickness of 4 mm as in the second embodiment, and an intermediate layer 22 is formed on one surface of the wooden board 21. One surface of one thin single plate made of cedar having a thickness of 3 mm is bonded with an aqueous vinyl urethane resin adhesive. As described above, the cedar wood is subjected to a dimensional stabilization treatment and cherry-colored dyeing.

  Further, on the other surface of the thin cedar plate constituting the intermediate layer 22, one surface of one thin single plate made of a cover material having a thickness of 0.45 mm constituting the surface layer 23 is water-based vinyl. Bonded with urethane resin adhesive. This cover material has been subjected to dimensional stabilization treatment as described above. The other surface of the white birch thin veneer constituting the surface layer 23 appears on the surface of the wooden decorative board 20. The white birch material constituting the surface layer 23 and the cherry-colored cedar material constituting the intermediate layer 22 are laminated so that the fiber directions of the grain are parallel to each other.

  Thus, in the wooden decorative board 20 in which the three layers of the surface layer 23, the intermediate layer 22, and the wooden substrate 21 are laminated, the surface layer 23 side is extended to the central portion of the intermediate layer 22 as in the second embodiment. A cutting site 24 having a depth of 1.0 mm is partially formed by an NC router (see FIG. 4).

  As a result, the cherry-colored cedar material constituting the intermediate layer 22 appears in the cutting portion 24 formed on the white surface of the wooden decorative board 20 in parallel with the fiber direction of the grain, and the wooden decorative board 20 The rolling pattern formed on the surface of the wood represents a high degree of design with the texture of the tree species, color, changes due to unevenness, and uniformity of the fiber direction of the grain.

  Here, the wood decorative board obtained in Example 2 was evaluated. Evaluation items were the same as in Example 1 above. Hereinafter, the evaluation result of each test item will be described.

a. Warp Arrow Height Measurement Test (BLT ID-01):
The depth of the recesses in the diagonal direction of the 909 mm × 1818 mm wood decorative board obtained in Example 2 was within 0.5 mm (standard was within 3 mm), and almost no warping occurred. Moreover, there was no twist and peeling did not occur.

b. Deformation test by water absorption (BLT ID-10):
The depth of the concave portion in the diagonal direction of the 909 mm × 1818 mm wood decorative board obtained in Example 2 was 0.5 mm (the reference is normal for use), and only slight warping occurred. Further, the twist was only 0.5 mm, and no peeling occurred.

c. Pencil hardness test (JIS-K5400):
The wood decorative board obtained in Example 1 withstood a load of 1 kg with a pencil hardness of 6B, showed a good hardness, and was not easily damaged.

  From the above, also in this Example 2, it has a high degree of dimensional stability with respect to the change in moisture content, and the surface layer and intermediate layer are not peeled or cracked due to a deviation such as warpage or twist, and the moisture content is reduced. A wood decorative board and a method for producing the same, which have high design value and are less likely to cause scratches, dents and cracks on the surface, without causing problems due to changes in the wood decorative boards due to changes and the occurrence of gaps. Can be provided.

In carrying out the present invention, the following various modifications are possible without being limited to the above embodiments.
(1) In each of the above embodiments, a wood decorative board having an intermediate layer has been described. However, the present invention is not limited to this, and a surface layer is laminated directly on a wood substrate, and a cutting site is formed from the surface layer side. You may make it do. Even in this case, it is possible to express a good design without breaking the cutting portion of the surface layer.
(2) In each of the above embodiments, the wood decorative board in which only one intermediate layer is laminated between the surface layer and the wood substrate has been described. However, the present invention is not limited to this, and a plurality of intermediate layers are formed on the surface layer. It is also possible to form a cutting part having a different depth from the surface layer side to each intermediate layer. In this case, the cutting part of the surface layer represents a more complex hue change and can express a good design.
(3) FIG. 5 shows a partial plan view of a wood decorative board different from the above embodiments. Such a wood decorative board can produce a great many types of wood decorative boards by combining the material and color of the surface layer, the material and color of the intermediate layer, and the shapes of various cutting parts. In addition, by standardizing the material, color, and thickness of the surface layer and intermediate layer into several types, while standardizing the cutting conditions into several types, the laminating process and the cutting process can be performed at the same depth, and many designs are available. Productivity of wood decorative board is improved. This greatly expands the market for wooden decorative boards.

  DESCRIPTION OF SYMBOLS 10, 20 ... Wood decorative board, 11, 21 ... Wood board | substrate, 12, 22 ... Intermediate | middle layer, 13, 23 ... Surface layer, 14, 24 ... Cutting site | part.

Claims (8)

In the manufacturing method of the wooden decorative board formed by laminating the wooden substrate and the surface layer made of a thin single plate,
A dimensional stabilization process step of performing a dimensional stabilization process on the wood material constituting the surface layer;
A laminating step of laminating the wooden substrate and the surface layer after the dimension stabilizing treatment step;
Possess a cutting step of forming a cutting portion which is cut from the side of the surface layer after the lamination process,
The dimension stabilization treatment includes a first component composed of an addition product of a cyclic urea compound and glyoxal,
A treatment liquid containing a second component consisting of 4,5-dihydroxy-2-imidazolidinone or a derivative thereof,
Production method of the wood veneer, wherein Rukoto said first component and said second component are reacted cured impregnated with the wood elements during wood material constituting the surface layer.   2. The method for manufacturing a wooden decorative board according to claim 1, wherein the cutting portion is cut at a depth from the surface layer side to the wooden substrate. In the method for producing a wooden decorative board formed by laminating a wooden substrate, an intermediate layer made of at least one thin single plate, and a surface layer made of another thin single plate,
A dimensional stabilization process step of performing a dimensional stabilization process on the wood material constituting the intermediate layer and the surface layer;
A lamination step of laminating the wood substrate, the intermediate layer, and the surface layer after the dimension stabilization treatment step;
Possess a cutting step of forming a cutting portion which is cut at a depth not exceeding the intermediate layer together with the side of the surface layer after the laminating step leading to the intermediate layer,
The dimension stabilization treatment includes a first component composed of an addition product of a cyclic urea compound and glyoxal,
A treatment liquid containing a second component consisting of 4,5-dihydroxy-2-imidazolidinone or a derivative thereof,
Production method of the wood veneer, characterized in Rukoto reacted curing the first component and the second component in the woody material and impregnating the wood material constituting the intermediate layer the wood material forming the surface layer . In the dimension stabilization treatment, in addition to the first component and the second component, a treatment liquid containing a third component made of glycols,
  When the wood material constituting the surface layer and the intermediate layer are present, the wood material constituting the intermediate layer is impregnated and the third component reacts with the first component and the second component in the wood material. It hardens | cures, The manufacturing method of the wooden decorative board as described in any one of Claims 1-3 characterized by the above-mentioned. The first component comprises an addition product of 2-imidazolidinone and glyoxal, and is formed by adding 0.9 mol to 1.2 mol of glyoxal with respect to 1 mol of 2-imidazolidinone. The manufacturing method of the wooden decorative board as described in any one of Claims 1-4. The second component is 1,3-dimethyl-4,5-dihydroxy-2-imidazolidinone, 1,3-bis (hydroxymethyl) -4,5-dihydroxy-2-imidazolidinone, 1,3- 6. The woody decorative board according to claim 1, comprising at least one selected from the group consisting of bis (hydroxyethyl) -4,5-dihydroxy-2-imidazolidinone. Manufacturing method. When the wood material constituting the surface layer and the intermediate layer are present, the wood material constituting the intermediate layer is subjected to a dyeing process or a bleaching process in the dimension stabilization process or in a separate process. The method for producing a wooden decorative board according to any one of claims 1 to 6. A wooden decorative board manufactured by the method for manufacturing a wooden decorative board according to any one of claims 1 to 7.