JP2015157414A - Method for producing woody decorative veneer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a woody decorative veneer having excellent design due to geometric patterns such as a beautiful muntin pattern and a parquet pattern, being suitable for stable mass production and capable of securing physical properties required in a practical field.SOLUTION: A resin for a dimensional stabilization treatment is immersed into a woody material and each component constituting geometric patterns such as a parquet and a muntin is produced from the woody material. Next, an adhesive resin is coated on and adhered to each produced component, and pattern blocks such as a muntin pattern block and a parquet pattern block are produced. Next, a veneer is produced by performing a plate grinding work or a cutting work so as to have a predetermined thickness and so that each pattern of the blocks appears on a surface in a state that the immersed resin for the dimensional stabilization treatment is unreacted. Finally, the unreacted resin for the dimensional stabilization treatment being immersed into the veneer is reactively hardened.

Description

  The present invention relates to a method for manufacturing a wooden decorative veneer that expresses a geometric pattern such as a kumiko pattern or a parquet pattern, and in particular, a method for manufacturing a new wooden decorative veneer that can be widely used for architectural interior materials and furniture. It is about.

  Kumiko used in Japanese style architectural balustrades and paper shojis is highly valued as a decorative item by combining a plurality of kumiko pieces made of small pieces of wood to form a beautiful kumiko pattern. This kumiko is desired to be used in practical fields because of the beauty of the grain and geometric patterns. In particular, if the beauty of the kumiko pattern is expressed and it can be used as a veneer pattern decorative veneer for architectural interior materials such as wall materials and flooring materials, and practical furniture, the added value is great.

  On the other hand, marquetry used for craft souvenirs such as small boxes is also desired to be used for more practical applications because of its beautiful surface pattern. In particular, if the beauty of the parquet pattern is expressed and it can be used as a veneered decorative veneer for architectural interior materials such as wall materials and flooring materials and practical furniture, the added value will be great.

  Therefore, in order to use a geometric pattern such as a kumiko or a parquet for architectural interior materials or utility furniture, it is necessary to produce a large amount of a kumiko decorative veneer or a parquet decorative veneer. In these practical applications, the physical properties required for a decorative veneer having a geometric pattern such as a kumiko decorative veneer or a parquet decorative veneer are insufficient at the conventional craft level. is there.

  However, Kumiko is an arts and crafts product that is produced as a single item, and its production requires high craftsmanship and time. Therefore, it cannot be produced in a large amount, and the physical properties required for architectural interior materials and practical furniture cannot be satisfied. Therefore, it cannot be used for building interior materials or practical furniture that require stable mass production of large decorative veneers with excellent physical properties.

  On the other hand, in the case of parquet, first, a piece of wood is combined to make a seed plate, and these are bonded together to form a small block. The small block can then be sliced along the decorative surface to produce a large amount of thin decorative veneer.

  However, parquet is only a craft, and can only be sliced to make a small veneer. Moreover, it does not satisfy the physical properties required for architectural interior materials and practical furniture. Therefore, it is difficult to use it for architectural interior materials and practical furniture that require stable mass production of large decorative veneers with excellent physical properties.

  For this reason, various proposals have been made for kumiko and parquet. For example, in the method for producing a kumiko sheet disclosed in Patent Document 1, a kumiko duplication is proposed. In this method of manufacturing a braided sheet, first, a braided body is produced. Next, a reinforcing layer forming material is applied to the upper surface of the braid body and dried to form a reinforcing layer. Then, the upper surface of the braid body is sliced thinly together with the reinforcing layer to produce a braid sheet.

JP 2007-176151 A

  By the way, in the braided sheet of the above-mentioned patent document 1, a reinforcing layer must be formed (coating and drying) every time one braided sheet is produced, which is not suitable for stable mass production. In addition, the assembly sheet produced in this way has many gaps unique to the assembly, and its physical properties become weaker by being sliced thinly, so that it can be used for building interior materials such as wall materials and flooring materials, and practical furniture. It cannot be used.

  Therefore, the present invention addresses the above and has excellent design characteristics with geometric patterns such as beautiful kumiko patterns and parquet patterns, suitable for stable mass production, and required in practical fields. An object of the present invention is to provide a method for producing a wood veneer veneer capable of ensuring the physical properties.

  In solving the above problems, the present inventors, as a result of diligent research, slicing the wood material constituting a geometric pattern such as a kumiko or a parquet, and then slicing the resin It was found that the above-mentioned object can be achieved by reactive curing of the present invention, and the present invention has been completed.

That is, according to the description of claim 1, the method for producing a wood veneer veneer according to the present invention,
In the method of manufacturing a wooden decorative veneer in which a geometric pattern formed by combining a plurality of wooden parts appears on the surface,
A resin impregnation step of impregnating a wooden material constituting the wooden part with a resin for dimension stabilization treatment;
In a state in which the resin for dimension stabilization treatment is in an unreacted state, a component manufacturing step for manufacturing the wooden component from the wooden material after resin impregnation,
In a state where the resin for dimension stabilization treatment is in an unreacted state, by applying an adhesive resin to the wooden part and adhering each wooden part, a pattern block making process for making a pattern block;
The adhesive resin is reacted and cured to complete adhesion, and the dimension stabilizing treatment resin is unreacted, and the pattern block is ground to a predetermined thickness so that each pattern appears on the surface. A single plate process for producing a single plate by processing or cutting,
And a resin reaction step of completing the dimension stabilization treatment by reaction curing the resin for dimension stabilization treatment impregnated in an unreacted state on the single plate after the single plate formation step.

Moreover, according to the description of Claim 2, this invention is the manufacturing method of the wooden decorative veneer of Claim 1,
The geometric pattern is a parquet pattern, the wooden part is a wooden parquet part constituting the parquet pattern, and the pattern block is a parquet pattern block obtained by bonding the wooden parquet part.

Moreover, according to the description of Claim 3, this invention is the manufacturing method of the wooden decorative veneer of Claim 1,
The geometric pattern is a kumiko pattern, and the wooden part is a wooden kumiko part and a wooden piece part constituting the kumiko pattern, and the pattern block bonds the wooden kumiko part and the wooden piece part. It is a kumiko pattern block.

Moreover, according to the description of Claim 4, this invention is the manufacturing method of the wooden decorative veneer of Claim 3,
In the component manufacturing process,
The wooden piece parts are produced so that the wooden piece parts can be fitted to the gap parts of the sets formed by the wooden piece parts, with respect to the set formed by assembling the wooden piece parts,
In the pattern block manufacturing process,
When the wooden piece parts are fitted into the gap portions, the direction of the grain pattern on the surface of each wooden piece part is changed to produce a braided pattern block.

Moreover, according to the description of Claim 5, this invention is the manufacturing method of the wooden decorative veneer of Claim 3,
In the component manufacturing process,
The wooden piece parts are produced so that the wooden piece parts can be fitted to the gap parts of the sets formed by the wooden piece parts, with respect to the set formed by assembling the wooden piece parts,
In the pattern block manufacturing process,
When the wooden piece parts are fitted into the gap portions, a kumiko pattern block is produced using a plurality of different patterns for the grain pattern on the surface of each wooden piece part.

Moreover, according to the description of Claim 6, this invention is the manufacturing method of the wooden decorative veneer of Claim 3,
In the component manufacturing process,
The wooden piece parts are produced so that the wooden piece parts can be fitted to the gap parts of the sets formed by the wooden piece parts, with respect to the set formed by assembling the wooden piece parts,
In the pattern block manufacturing process,
When the wooden piece part is fitted into the gap portion, a kumiko pattern block is produced using a plurality of different colors for the surface color of each wooden piece part.

Moreover, according to the description of Claim 7, this invention is the manufacturing method of the wooden decorative veneer of Claim 3,
In the component manufacturing process,
The wooden piece parts are produced so that the wooden piece parts can be fitted to the gap parts of the sets formed by the wooden piece parts, with respect to the set formed by assembling the wooden piece parts,
This wooden piece part is produced from a parquet block produced by applying an adhesive resin to a wooden parquet part and bonding the parts.

Moreover, according to the description of Claim 8, this invention is the manufacturing method of the woody decorative veneer as described in any one of Claims 1-7,
In the resin impregnation step,
The dimension stabilization treatment resin impregnated in the wood material is a first component composed of an addition product of a cyclic urea compound and glyoxal,
A second component consisting of 4,5-dihydroxy-2-imidazolidinone or a derivative thereof,
In the resin reaction step,
The first component and the second component impregnated in an unreacted state on the veneer are reactively cured.

Moreover, according to the description of Claim 9, this invention is the manufacturing method of the wooden veneer veneer as described in any one of Claims 1-8,
In addition to the first component and the second component, the resin for dimension stabilization treatment contains a third component made of glycols,
In the resin reaction step,
The third component impregnated in an unreacted state on the veneer is reactively cured together with the first component and the second component.

Moreover, this invention is the manufacturing method of the wooden veneer veneer as described in any one of Claims 1-9 according to description of Claim 10,
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. To do.

Moreover, according to the description of Claim 11, this invention is a manufacturing method of the wooden decorative veneer as described in any one of Claims 1-10,
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.

Moreover, according to the description of Claim 12, this invention is a manufacturing method of the wooden decorative veneer according to any one of Claims 1 to 11,
In the pattern block manufacturing process,
The bonding resin for bonding the wooden parts is a wet curable urethane resin adhesive.

Moreover, according to the description of Claim 13, the wooden veneer veneer according to the present invention,
It is manufactured by the manufacturing method of the woody veneer veneer according to claims 1 to 12.

According to the description of claim 14, the present invention is the wood veneer veneer according to claim 13,
When the reaction hardening of the resin for dimension stabilization treatment impregnated in the wood material constituting the wood part is completed, the maximum volume when the wood material having a high moisture content in a raw material state is dried to an absolutely dry state The value of the rate of change is 4% or less, and the value of the maximum rate of change in the three dimensions of thickness, width, and length is all 3% or less.

  According to the configuration of the first aspect, a geometric pattern formed by combining a plurality of wooden parts appears on the surface of the wooden decorative veneer manufactured by the present manufacturing method. As a result, in the wood veneer veneer, a complicated and beautiful geometric pattern can be expressed as the surface pattern.

  Moreover, according to the said structure, the manufacturing method of a wooden decorative veneer first impregnates the wooden material which comprises the wooden part which forms a geometric pattern in the resin impregnation process with the resin for dimension stabilization processing. Next, in the component manufacturing process, a wooden component is manufactured from a wooden material in a state where the impregnated dimension stabilizing resin is unreacted.

  Next, in the pattern block manufacturing process, in a state where the dimension stabilization treatment resin impregnated in each component is unreacted, the adhesive resin is applied to the wooden component to bond each component. In this way, the parts are bonded to form a pattern block.

  Next, in the veneering process, the adhesive resin for bonding the components is reactively cured to complete the bonding, and the dimensional stabilization treatment resin impregnated in each component is unreacted, and the cosmetic A single plate having a predetermined thickness is produced from the pattern block so that the geometric pattern appears on the surface. For the production of this single plate, grinding plate processing or cutting processing is used. Finally, in the resin reaction step, the dimension stabilizing treatment is completed by reacting and curing the dimension stabilizing treatment resin impregnated on the single plate in an unreacted state.

  Thus, the resin for dimension stabilization treatment impregnated in the wood material in the first resin impregnation step passes through each intermediate step in an unreacted state without being reactively cured until the final resin reaction step. In this way, in a state where the resin for dimension stabilization treatment has not been reacted, a part manufacturing process in which wood material is ground or cut, a pattern block manufacturing process in which each part is bonded, a pattern block is thinly sliced, etc. By passing through each process of the single plate manufacturing process, the work of each process becomes easy. Therefore, the geometric pattern does not collapse even in a state of being processed into a predetermined thickness by grinding or cutting.

  Furthermore, since the reaction hardening of the resin for dimensional stabilization treatment is completed in the final resin reaction step, the produced wood veneer veneer has excellent dimensional stability and geometry even in practical use. The pattern does not collapse and has practical strength such as surface hardness. Therefore, the wood veneer veneer is suitable for stable mass production and can ensure physical properties required for practical use.

  Moreover, according to the structure of Claim 2, a geometric pattern may be a parquet pattern. As a result, a beautiful parquet pattern is expressed on the surface of the veneer veneer.

  Moreover, according to the structure of Claim 3, a geometric pattern may be a kumiko pattern. As a result, a beautiful kumiko pattern is expressed on the surface of the wood veneer veneer.

  In general, a braid has a beautiful braid pattern formed by a wooden braid part and a void portion unique to the braid. A wooden piece part is fitted into most of the gap portion in the wooden decorative veneer having the kumiko pattern according to claims 4 to 7 together with the kumiko pattern formed by the wooden kumiko part. Therefore, even in a state of being processed into a predetermined thickness by grinding or cutting, there is no gap portion as in the case of parquet work, or there are few gap portions and a practical strength can be ensured.

  According to the configuration of claim 4, when the wooden piece parts are fitted into the gap portions, the direction of the wood grain pattern on the surface of each wooden piece part may be changed to produce a kumiko pattern block. . Thereby, in addition to the skeleton pattern formed by each braided component, the wood grain pattern of the surface of the wooden piece component is added to the surface of the produced wooden decorative veneer, and a beautiful braided pattern can be formed.

  Further, according to the configuration of claim 5, when the wooden piece parts are fitted into the gap portions, the braided pattern block is produced using a plurality of different patterns on the wood grain pattern of the surface of each wooden piece part. Good. As a result, on the surface of the produced wood veneer, in addition to the skeleton pattern formed by each braided part, the grain pattern of the surface of the wooden piece part is changed to form a more complex and beautiful braided pattern. be able to.

  Moreover, according to the structure of Claim 6, when inserting a wooden piece part in a space | gap part, you may make it produce a assembly pattern block using a several different color for the color of the surface of each wooden piece part. . As a result, in addition to the skeleton pattern formed by each braided part, the surface of the produced wood veneer veneer has a color change in addition to the change in the grain pattern on the surface of the wooden piece part, making it a more complex and beautiful pair. A child pattern can be formed.

  Moreover, according to the structure of Claim 7, when fitting wooden piece components in a space | gap part, the parquet pattern block produced by apply | coating adhesive resin to each wooden piece component and adhering each component to a wooden parquet component You may make it produce from. As a result, a parquet pattern appears on the surface of the wooden piece parts in addition to the skeleton pattern formed by each kumiko part on the surface of the produced wood veneer veneer, and more complicated and beautiful kumiko pattern and parquet pattern Both can be formed.

  According to the structure of claim 8, the resin for dimensional stabilization treatment impregnated in the wood material is a first component composed of an addition product of a cyclic urea compound and glyoxal, and 4,5-dihydroxy-2-imidazo. And a second component made of lysinone or a derivative thereof. This resin for dimension stabilization treatment does not react and cure in the intermediate process. Then, in the resin reaction step, which is the final step, the first component is reacted and cured with the second component, and the reaction product is filled into the cell lumen, cell gap, and cell wall of the wood material constituting the wood veneer veneer. (This is called the bulking effect).

  As a result, the strength of the wood material constituting the wood veneer veneer is improved, the surface of the wood veneer veneer is cured, and the surface strength is also improved. As a result, even when this wood veneer veneer is used for architectural interior materials, practical furniture, etc., parts are not peeled off or cracked due to warping or twisting due to changes in moisture content.

  In addition, the second component made of 4,5-dihydroxy-2-imidazolidinone or a derivative thereof impregnated in the wood material constituting the wood veneer cross-links between cellulose molecules constituting the cell wall of the wood material. It has a possibility.

  As a result, the strength of the cell wall of the wooden material constituting the wooden decorative veneer is improved, and the dimensional stabilization of the wooden decorative veneer with respect to a change in moisture content is further achieved. As a result, the wooden decorative veneer does not distort or peel off, such as warping or twisting, and does not crack.

  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. Accordingly, it is possible to use the wood decorative veneer as a main purpose for preventing the discoloration caused by light.

  Moreover, according to the structure of Claim 9, in addition to the 1st component and the 2nd component, you may make it add the 3rd component which consists of glycols. This third component is reacted and cured together with the first component and the second component described above, and the reaction product is filled into the cell lumen, cell space, and cell wall of the woody material. As a result, the strength of the woody material constituting the wood veneer veneer is improved, and the surface of the wood veneer veneer is cured to improve the surface strength. Furthermore, the dimensional stabilization of the wood veneer veneer with respect to the change in moisture content can be achieved.

  Moreover, according to the structure of Claim 10, the addition product of the 1st component has 2-component 2-imidazolidinone and glyoxal added in the ratio close | similar to equimolar number. That is, it may be in a 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, there are many opportunities for the molecules of the first component to cause a self-polymerization reaction in the wood material constituting the wood decorative veneer. As a result, the degree of polymerization of the polymer filled in the cell lumens, cell gaps and cell walls of the wood material constituting the wood veneer veneer increases, and the wood veneer veneer improves strength and stabilizes dimensions due to the filling effect. Is further improved.

  According to the configuration of claim 11, the second component may be 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 may be used. Further, the second component may be a blend of these derivatives.

  These 2nd components have high reactivity with the cellulose molecule which comprises the cell wall of the woody material which comprises a wooden decorative veneer, and bridge | crosslink a cellulose molecule firmly. 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, the strength of the wood material constituting the wood veneer is further improved, and the dimensional stability of the wood veneer is further improved.

  According to the twelfth aspect of the present invention, in the pattern block manufacturing step, the adhesive resin for bonding the wooden part may be a wet curable urethane resin adhesive. Because the adhesive resin is a wet-curing urethane resin adhesive, even when each wooden part such as wooden braiding parts, wooden piece parts and wooden parquet parts is in the raw material state, its wet surface is firmly bonded. Does not require high temperature reaction conditions. In addition, the wet curable urethane resin adhesive not only bonds the parts together, but also reacts with the resin for dimensional stabilization treatment that is impregnated into the wood material constituting the wood decorative veneer and reacts and hardens, so that the wood veneer veneer As a result, the adhesive strength between the components constituting the structure is improved and the dimensional stability of the wood veneer veneer is further improved.

  Moreover, according to the structure of Claim 13, a wooden decorative veneer is manufactured by the manufacturing method of the wooden decorative veneer of Claims 1-12. Further, according to the configuration of claim 14, the dimensional stability of the wood decorative veneer is such that the wood material of high moisture content in the raw material state is completely dried at the stage where the reaction hardening of the resin for dimensional stabilization treatment is completed. The value of the maximum rate of change in volume when dried to a state is preferably 4% or less. Furthermore, it is preferable that the value of the maximum change rate of the dimension in three directions of thickness (mesh direction), width (plate direction) and length (fiber direction) is 3% or less. If the wood material constituting the wood decorative veneer is subjected to such a dimensional stabilization treatment, the surface of the wood veneer veneer becomes smooth due to its action, the design is excellent, and the physical properties are further improved.

  Therefore, according to the present invention, it has an excellent design property due to a geometric pattern such as a beautiful kumiko pattern or a parquet pattern, is suitable for stable mass production, and ensures physical properties required in a practical field. The manufacturing method of the woody veneer which can be provided can be provided.

It is a photograph which shows the kumiko pattern on the surface of the kumiko pattern veneer veneer manufactured in Example 1. 2 is a photograph showing a wooden assembly part in Example 1. FIG. It is a process photograph which shows the assembly | attachment step 1 of a wooden assembly part in Example 1. FIG. It is a process photograph which shows the assembly | attachment step 2 of a wooden assembly part in Example 1. FIG. It is a process photograph which shows the completion of assembly | attachment of the wooden assembly part in Example 1. FIG. It is a process photograph which shows the wooden piece part and its assembly | attachment step 1 in Example 1. FIG. It is a process photograph which shows the assembly | attachment step 2 of a wooden piece part in Example 1. FIG. It is a process photograph which shows the assembly | attachment step 3 of a wooden piece part in Example 1. FIG. It is a process photograph which shows the completion of assembly | attachment of the wooden assembly part and the wooden piece part in Example 1. FIG. It is a figure which shows the 1st step of manufacture of the parquet pattern wood decoration veneer manufactured in Example 2. FIG. It is a figure which shows the 2nd step of manufacture of the parquet-pattern wood decoration veneer manufactured in Example 2. FIG. It is a figure which shows the last step of manufacture of the parquet-patterned wood decoration veneer manufactured in Example 2. FIG. It is a photograph which shows the specific example 1 of the parquet pattern of the parquet pattern woody makeup veneer manufactured in Example 2. FIG. It is a photograph which shows the specific example 2 of the parquet pattern of the parquet pattern woody veneer manufactured in Example 2. FIG. It is the photograph which shows the specific example 3 of the parquet pattern of the parquet pattern woody veneer manufactured in Example 2. FIG. It is a photograph which shows the specific example which joins the wooden decorative veneer which the edge part of the length direction becomes a zigzag pattern in the length direction. It is a photograph which shows the specific example which joins a wooden decorative veneer according to a geometric pattern in the length direction and the width direction. It is a photograph which shows the favorable joining state in which the natural grain appears in the joined part in the length direction of the woody veneer veneer. It is a photograph which shows the poor joining state in which the unnatural grain appears in the joined part in the length direction of the woody veneer veneer.

  In the present invention, the geometric pattern is mainly composed of a kumiko pattern or a parquet pattern. Here, the kumiko pattern is a space pattern portion of this geometric pattern in addition to the geometric pattern formed by a kumiko piece (in the present invention, referred to as “wooden knit part”) which is a general kumiko pattern. An overall pattern including a wood grain pattern and color appearing on the surface of a wooden piece part (to be described later) fitted in. Therefore, a wooden piece part made from a parquet is inserted into a space portion of a geometric pattern formed by the wooden braiding part, and a parquet pattern is added to the geometric part. On the other hand, in the present invention, the marquetry pattern is a Japanese tradition such as stripes, checkers, saaya type, hemp leaf, trout, arrow feathers, Seikaiha, etc., made by a general parquet technique. In addition to patterns, this includes new designs.

  In the present invention, any tree species may be used as the wood material used as the starting material for the wood veneer. Further, it may be any of hardwoods, conifers, etc., for example, cedar, cypress, pine, lawan and the like may be used. Furthermore, oak, hippo, zelkova, teak, etc., which are excellent in the design of the wood grain pattern may be used. In the present invention, it is preferable to use cedar, hinoki, teak, and pine, among these tree species, which can exert the effect of dimensional stabilization. When these tree species are used, due to the filling effect of the resin for size stabilization treatment according to the present invention, the maximum rate of change in dimensions when a wood material with a high moisture content in a raw material state is dried to an absolutely dry state. A high degree of dimensional stability can be achieved, with a value of 3% or less and a maximum volume change rate of 4% or less.

  In the present invention, the color or wood grain pattern of the woody material may make use of the natural color or wood grain pattern of cedar white hand (sapwood), cedar red hand (core material), Genpei cedar, cypress, for example. Or, it may be used after dyeing to an arbitrary color.

  Here, the color refers to a combination of colors represented by the woody material, coloration, and hue, which are different in hue, saturation, brightness, and the like, and change design properties. Further, in the present invention, 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.

  On the other hand, in the present invention, the dimensional stabilization processing performed on a wooden part such as a wooden pattern part, a wooden piece part, or a wooden parquet part that forms a geometric pattern such as a kumiko pattern or a parquet pattern is a normal wood processing. Can be used. For example, resin impregnation treatment such as glyoxal resin, formalization treatment, acetylation treatment, and filling treatment such as polyethylene glycol are used. Moreover, the surface hardness of each component can be improved by performing these dimension stabilization processes. In particular, this surface hardness is important when a wood veneer veneer is used as a flooring or the like.

  In the present invention, a practically sufficient level of surface hardness and dimensional stability can be imparted to the produced wood veneer veneer by performing a dimensional stabilization treatment by the resin formulation shown below. The prescription will be described below.

  In the present invention, in the resin impregnation step, wooden parts such as wooden braiding parts, wooden piece parts and wooden parquet parts are impregnated with a treatment liquid containing a resin for dimensional stabilization treatment (hereinafter referred to as “treatment liquid”). To do. This treatment liquid contains a first component composed of an addition product of a cyclic urea compound and glyoxal and a second component composed of 4,5-dihydroxy-2-imidazolidinone or a derivative thereof.

  Here, 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 to 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. This facilitates the self-polymerization of the initial polymer constituting the first component within the cell lumen, cell gap and cell wall of the wood material constituting the wood veneer veneer, and as a result, is filled as a higher molecular weight resin. Will be.

  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 the cellulose molecules constituting the cell walls of the wood material constituting the wood veneer veneer, and a crosslinked structure is formed between these cellulose molecules to form cell wall Contributes to strength improvement and dimensional stabilization. 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. As a result, the strength of the cell wall of the wood material constituting the wood veneer veneer and the filling of the cell lumen, cell gap and cell wall are achieved, and the dimensional stability and surface hardening of the wood veneer veneer are successfully achieved. The

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

  In Chemical Formula 4, the hydroxymethyl groups at the 1st and 3rd positions have a very high reactivity with the cellulose molecules constituting the cell walls of the wood material constituting the wood veneer veneer, and form a strong cross-linked structure between the cellulose molecules. It greatly contributes to the improvement of cell wall strength and dimensional stability. 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 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 cell lumen, cell gap and cell wall of the wood material constituting the wood veneer veneer It also serves to bind the cell wall with the resin filled in the cell. As a result, the strength of the cell wall of the wood material constituting the wood veneer veneer and the filling of the cell lumen, cell gap and cell wall are achieved, and the dimensional stability and surface hardening of the wood veneer veneer are successfully achieved. The

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

  In the chemical formula 5, the hydroxyethyl groups at the 1-position and the 3-position are reactive with the cellulose molecules constituting the cell wall of the wood material constituting the wood veneer veneer, forming a crosslinked structure between the cellulose molecules, Greatly contributes to strength improvement and 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. 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 cell lumens, cell gaps and cell walls of the wood material constituting the wood veneer veneer. It also serves to bind the cell wall with the resin filled in the cell. As a result, the strength of the cell wall of the wood material constituting the wood veneer veneer and the filling of the cell lumen, cell gap and cell wall are achieved, and the dimensional stability and surface hardening of the wood veneer veneer are successfully achieved. The

  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.

  Furthermore, when glycols are used in combination as the third component of the treatment liquid, they can also react with adhesives that adhere wooden parts such as wooden assembly parts, wooden piece parts, and wooden parquet parts. As a result, each component (first component, second component, and third component) of the treatment liquid filled and cured inside each component reacts with the adhesive, and the adhesion between the components becomes stronger.

  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.

  On the other hand, in the present invention, an adhesive resin for adhering wooden parts such as a wooden pattern part or a wooden piece part or a wooden parquet part that forms a geometric pattern such as a kumiko pattern or a parquet pattern is used as a normal resin. Woodworking adhesives used in wood processing can be used. For example, it is preferable to use an isocyanate adhesive, an epoxy adhesive, a silicone adhesive, or the like.

  In particular, in the present invention, it is preferable to adopt one that does not require high-temperature treatment for the adhesion reaction, and each part even at the stage where wooden parts such as wooden braiding parts, wooden piece parts and wooden parquet parts are bonded. It is preferable that the resin impregnated in is in an unreacted state and not cured (the reason will be described later). Furthermore, in the present invention, the wood materials constituting the wooden parts such as the wooden braiding parts, the wooden piece parts, and the wooden parquet parts are impregnated with the treatment liquid and are in a raw material state, and thus contain a large amount of moisture. Therefore, it is preferable to select an adhesive that contains a large amount of moisture and has excellent adhesion on a wet surface. For this reason, in the present invention, it is preferable to use a urethane resin adhesive which is the isocyanate adhesive.

  In general, a urethane resin adhesive is a general term for an adhesive having a urethane group (—NHCOO—), but in the present invention, it is interpreted broadly and derived from an isocyanate group (—NCO) or a hydroxy group (—OH). It shall contain an adhesive that combines. These urethane resin adhesives contain a urethane resin obtained by a reaction between a polyol compound and a polyisocyanate compound as a component, and various physical properties can be combined to obtain various physical properties.

  These urethane resin adhesives are generally classified into a two-component type and a one-component type. The two-part type is a polyol and polyisocyanate having a hydroxyl group at the end, or a urethane having an isocyanate group at the end. HYPERLINK "http://en.wikipedia.org/wiki/%E3%83%97%E3%83%AC % E3% 83% 9D% E3% 83% AA% E3% 83% 9E% E3% 83% BC "\ o" Prepolymer "Prepolymer and polyol are combined and mixed to cause a chemical reaction and cure, Can be bonded at room temperature. On the other hand, in the one-pack type, a mixed liquid of urethane prepolymer and catalyst is cured by humidification (moisture) or heating and bonded.

  In the present invention, among these urethane resin adhesives, a wet curable urethane resin that reacts with moisture contained in a wooden material constituting a wooden part such as a wooden braiding part, a wooden piece part, and a wooden parquet part. It is preferable to use an adhesive. These wet-curing urethane resin adhesives are cured by a reaction between moisture in the adherend and isocyanate groups in the adhesive. Furthermore, the isocyanate group in the wet curable urethane resin adhesive can also react with the hydroxyl group (—OH) in the first component, the second component, and the third component of the resin for dimensional stabilization treatment. As a result, each component (first component, second component, and third component) of the treatment liquid filled and cured inside each component reacts with the adhesive, and the adhesion between the components becomes stronger.

  On the other hand, in the present invention, wooden parts such as wooden braiding parts, wooden piece parts and wooden parquet parts can be dyed and used. In this case, the dyeing process may be performed by a method used in normal 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 impregnation and dyeing | staining can also be simultaneously processed in the processing liquid impregnation bath of the said resin for dimension stabilization processing. 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. In addition, reactive dyes that react with cellulose and lignin in the wood material can also be used.

  When the dyeing treatment is performed simultaneously in the treatment liquid impregnation bath, it is preferable to raise 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 increased by the impregnation treatment 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, wooden parts such as wooden braiding parts, wooden piece parts and wooden parquet parts can be bleached and used. The bleaching treatment may be performed by a method used in normal 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, the bleaching treatment may be performed before the impregnation with the treatment liquid of the dimension stabilizing treatment resin. As a bleaching agent used for this bleaching treatment, hydrogen peroxide water or the like is generally used.

  Next, a method for producing a wood veneer veneer according to the present invention will be described with reference to the following example. In addition, the manufacturing method of the wooden decorative veneer according to the present invention is not limited to the following examples. Here, the wooden decorative veneer can be classified into the following three types. A kumiko pattern formed by assembling a plurality of wooden kumiko parts and wooden piece parts appears on the surface of the first woody veneer veneer. In this first woody veneer, a wooden assembly part is assembled to form an assembly. A wooden piece part produced in accordance with the shape and size of the braid is inserted into the gap portion of the braid. In addition, only the parquet pattern formed by bringing together a plurality of wooden parquet parts appears on the surface of the second woody veneer veneer.

  On the other hand, a braid pattern formed by assembling a plurality of wooden brace parts and a parquet pattern formed by abutting a plurality of wooden parquet parts appear on the surface of the third wood veneer veneer. In this third woody veneer, a wooden assembly part is assembled to form an assembly. In the gap portion of the braid, a wooden piece part is manufactured and fitted from a parquet formed by bringing together a plurality of wooden parquet parts.

  The method for producing a wood decorative veneer according to the present invention includes a resin impregnation step, a component production step, a pattern block production step, a veneering step, and a resin reaction step as main steps, and the preparation steps thereof. It has a process liquid adjustment process. Below, these preparatory processes and this process are demonstrated.

A. Process liquid adjustment process In this preparation process, the process liquid which impregnates the wooden material which comprises wooden parts, such as a wooden assembly part, a wooden piece part, and a wooden parquet part, is adjusted. The above-mentioned first component, second component and catalyst are blended to adjust the treatment liquid. 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 applied to the wood material constituting each part may be appropriately adjusted depending on the type and shape of the wood material and the application to be used, but the solid content of the resin for dimensional stabilization treatment after the resin reaction step described below. It is preferable that the rate of weight increase with respect to the absolute dry weight of the wood material is within the range of 8% to 80%. Due to the solid content of the resin for dimensional stabilization applied to the wood material being within the above range, filling of the wood material into the cell lumen, cell gap and cell wall, cross-linking between cellulose molecules constituting the cell wall, etc. Is well done. As a result, the dimensional stability of the wood veneer veneer is sufficiently achieved, and the surface hardening increases in proportion to the weight increase rate.

  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. Resin impregnation step In this resin impregnation step, a wood material constituting a wooden part such as a wooden braiding part, a wooden piece part and a wooden parquet part is impregnated with the treatment liquid prepared in the treatment liquid adjustment step. 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. Component manufacturing process In this component manufacturing process, wooden braiding parts, wooden piece parts, wooden parquet parts, etc. that form geometric patterns such as braided patterns or parquets from the wood material impregnated with the treatment liquid in the resin impregnation process, etc. Make wooden parts. At this stage, the resin for dimensional stabilization treatment in the treatment liquid impregnated in the wood material is in an unreacted state, and the wood material is in a raw material state (a state containing moisture in the treatment solution) to provide flexibility. Each part is easy to manufacture.

  For example, in the case of a kumiko, a plurality of produced wooden kumiko parts are assembled to form a kumiko skeleton. The formed kumiko has a plurality of voids in portions other than the skeleton. Next, a wooden wooden piece part to be fitted in these gaps is prepared. Specifically, wooden piece parts that match the shape of each gap are produced. These piece parts may be made of the same wooden material as the wooden braiding part, or may be made of a wooden material made of another tree species. These wooden piece parts are also made from a wooden material impregnated with a treatment liquid in a resin impregnation step. Therefore, the impregnated dimension stabilizing treatment resin is in an unreacted state, and the wood material is in a raw material state.

  Moreover, it is preferable to make these wood piece parts have a specific grain pattern or color on the surface. Furthermore, you may make it use the parquet produced from the parquet block mentioned later as these wooden piece components. As described above, the grain pattern, color, or parquet pattern appears on the surface of the wooden piece part, so that the completed kumiko pattern becomes more complicated and more beautiful.

D. Pattern block production process In this pattern block production process, a geometric pattern pattern block is produced from a plurality of wooden parts produced in the part production process. For example, in the case of a braid, a braided pattern block is produced from a plurality of wooden braid components and wooden piece components produced in the component production step. On the other hand, in the case of a parquet, a parquet pattern block is produced from a plurality of wooden parquet parts produced in the part production process.

  First, the kumiko pattern block is produced by fitting the prepared wooden piece parts into the gaps of the kumiko and bonding them to the skeleton of the wooden kumiko parts. On the other hand, for the production of the parquet block, the prepared wooden parquet parts are bonded to each other according to the parquet pattern. As described above, it is preferable to employ a material that does not require high-temperature treatment for the adhesion reaction, as described above, for the adhesion between the wooden braid part and the wooden piece part and between the wooden parquet parts. Even in this stage, it is preferable that the dimensional stabilization treatment resin impregnated in each component is in an unreacted state and the wood material is in a raw material state. Therefore, it is preferable to use a wet curable urethane resin adhesive which is a kind of isocyanate-based adhesive.

  A design box press can be used for bonding the wooden braiding part and the wooden piece part, and bonding the wooden parquet parts. This design box press has a rectangular frame body with multiple presses attached to the front, back, left, and right (the end and side), and a wooden assembly part that is temporarily assembled by applying an adhesive inside it. The wooden piece parts or the wooden parquet parts are arranged and pressed while checking the size of the kumiko pattern or the parquet pattern, and a kumiko pattern block and a parquet pattern block are produced. By using this design box press, it is possible to construct a complicated kumiko pattern or parquet pattern according to the design drawing without requiring high-level craftsmanship.

  The kumiko pattern block thus produced has a beautiful kumiko pattern by combining the skeleton pattern of the wooden kumiko part and the wood grain pattern and color of the surface of the wooden piece part on the surface. In addition, the parquet block has a beautiful parquet pattern by combining the grain pattern and color of each wooden parquet part on the surface.

  In this manner, the bonding of each component is completed in a state where a pattern block such as a kumiko pattern block or a parquet pattern block is pressed in the design box press. For this adhesion, as described above, by using an adhesive that does not require high-temperature treatment for the adhesion reaction, it is possible to keep the dimension stabilizing treatment resin impregnated in each component in an unreacted state. Thus, the pattern blocks such as the kumiko pattern block and the parquet block removed from the design box press are in an unreacted state at this stage, and the wood material is in a raw material state and is flexible. Maintaining sex.

  The contour of the geometric pattern is reflected in the planar shape of the pattern block thus produced. For example, in a parquet block with an arrow feather pattern, zigzag patterns appear as shapes at both ends in the length direction. When this is used as a decorative material for a wall after making it into a single plate, a plurality of single plates are joined and used. At this time, natural joining is required as a geometric pattern (specifically, described later).

E. Single plate process In this single plate process, a geometric pattern such as a kumiko pattern of the kumiko pattern block prepared in the above pattern block manufacturing process or a parquet pattern of the parquet pattern block is made to appear on the surface. A wood veneer veneer is produced by grinding or cutting to a thickness of. A normal band saw may be used for the processing of the ground plate of the pattern block such as the kumiko pattern block and the parquet pattern block, while a normal wood slicer may be used for the cutting process.

  Moreover, what is necessary is just to select arbitrarily the thickness which grinds according to a use purpose, for example, when using it for the surface of a flooring, it may be about 15 mm-1 mm. On the other hand, the thickness to be cut may be arbitrarily selected depending on the purpose of use. For example, when used on the surface of a wall material or the surface of furniture, the thickness may be about 5 mm to 0.1 mm.

  In the present invention, at this stage, the wooden parts constituting the pattern blocks such as the kumiko pattern block and the parquet pattern block are firmly bonded with an adhesive. Thus, in a pattern block such as a kumiko pattern block and a parquet pattern block, the parts are integrated and act like a piece of wood. On the other hand, the dimensional stabilization treatment resin impregnated in each part is in an unreacted state, and the wood material constituting each part is in a raw material state. In general, it is said that the cutting resistance of raw materials is about ¼ that of dry materials in grinding or cutting. Therefore, in the kumiko pattern block and the parquet block, each part is integrated, and the wood material constituting each part is in a raw material state, so that each part maintains the flexibility of wood and has a cutting resistance. The braided pattern is not distorted or broken during grinding or cutting.

F. Resin reaction step In this resin reaction step, the dimensions impregnated inside the single plate that has been ground or cut while maintaining the beauty of the kumiko pattern or the parquet pattern in the single plate process. Complete the reaction curing of the stabilization resin.

  In this step, the veneer is heat-treated in a heat treatment apparatus after drying or without drying, and reaction hardening of each component is completed. In the present invention, it is usually preferable to heat-treat after drying to a moisture content of about 10% to 20% by weight. The heat treatment conditions for reaction hardening of the dimension stabilization treatment resin may be appropriately selected depending on the thickness and shape of the veneer, the components of the dimension stabilization treatment resin, the type and amount of reaction catalyst used. For example, in the case of a single plate material having a thickness of about 1 mm to 15 mm, treatment at 110 ° C. to 160 ° C., preferably 130 ° C. to 150 ° C., for 2 minutes to 30 minutes is preferable.

  By this reaction, the first component of the dimensional stabilization resin is self-polymerized and filled in the cell lumen, cell gap and cell wall of the wood material, and the second component crosslinks between cellulose molecules on the cell wall. Improve the strength of the cell wall of woody material. 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. Furthermore, the adhesive that has reacted in the previous pattern block manufacturing process also reacts with each component (particularly the third component) of the resin for dimension stabilization treatment, and this reaction further proceeds.

  From these things, the wooden veneer veneer manufactured by this invention has the following merit. For example, according to the measurement by the present inventors, the hardness of a wood decorative veneer using a cedar sapwood portion is 2.6 times that of the untreated hardness according to the present invention. In addition, as a secondary effect of the present invention, by using the above-mentioned resin for dimensional stabilization treatment, burns due to light on the surface of the wood veneer veneer are reduced to 1/15 or less with respect to no treatment, which is greatly reduced. . Furthermore, in the manufacturing method according to the present invention, there is no problem such as generation of mold of the material during the manufacturing process, and the productivity and the yield of the material are improved. In addition, the woody material can be stored in a raw material state for a long period of time (for example, indoor storage for 6 months), and during this time, no deviation or cracking occurs, so that the yield of the material is further improved.

  Here, the joining of the wood decorative veneers in the case where both ends in the length direction and both ends in the width direction of the produced wood veneer are non-linear will be described. As described above, when the contour of the geometric pattern is reflected in the planar shape of the pattern block, the contour of the geometric pattern is also reflected at the edge of the wood veneer veneer made into a single plate from the pattern block. ing.

  For example, in FIG. 16, a zigzag pattern appears as a shape on both ends in the length direction of a wood veneer veneered from a parquet block with an arrow feather pattern (see FIGS. 16-1 and 16-3). . Accordingly, the zigzag patterns of the two wood veneer veneers are joined together (see FIG. 16-2).

  When joining wood veneer veneers with zigzag edges, it is required that the geometric pattern represents the natural grain throughout not only the joint but also the entire decorative material after joining. . Therefore, when joining a plurality of woody veneer veneers, a device is required not only for the combination in the length direction but also for the combination in the width direction. That is, in FIG. 17, when the four wood veneer veneers arranged as shown in FIG. 17-1 can be joined at that position, it becomes as shown in FIG. 17-3. However, when the entire geometric pattern becomes unnatural in this state, the natural grain appears in the entire geometric pattern as shown in FIG. 17-2 or FIG. 17-4 at the joint position in the width direction. It is necessary to devise.

  Here, FIG. 18 shows a good joined state in which natural grain appears in the joined portion in the length direction of the wood decorative veneer. On the other hand, FIG. 19 shows an unsatisfactory joining state in which an unnatural grain appears in the joining portion.

  Hereinafter, the method for producing a wood veneer veneer according to the present invention will be described with reference to each example.

  In the first embodiment, a method for manufacturing a wooden veneer veneer will be described by taking a lattice-patterned braid as an example. FIG. 1 is a photograph showing a kumiko pattern on the surface of a kumiko pattern wood veneer according to the first embodiment. Moreover, FIGS. 2-9 is each process photograph which shows each preparation process of the kumiko pattern wooden decorative veneer which concerns on a present Example.

A. Process liquid adjustment process In the present Example 1, the impregnation process of the process liquid shown below was given to the cedar board | plate material which performed the artificial drying process (kiln dry). In the treatment liquid of Example 1, an aqueous solution (solid content: 40% by weight) of a compound obtained by reacting 2-imidazolidinone and glyoxal in equimolar numbers as the first component was 62 g / liter, and the second component. 1,3-bis (hydroxymethyl) -4,5-dihydroxy-2-imidazolidinone aqueous solution (solid content: 40% by weight) as 280 g / liter and dipropylene glycol (100% product) as the third component Was prepared as an aqueous solution containing 93 g / l of magnesium chloride aqueous solution (solid content: 25% by weight) as a catalyst.

B. Resin impregnation step In the resin impregnation step of Example 1, cedar 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 reduction state, the cedar board | plate material was immersed in the process liquid, and it heated up to the process temperature of 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 cell lumen, cell gap and cell wall of the cedar board were impregnated with the treatment liquid. The amount of impregnation at this time was 330% with respect to the weight of the cedar board. In addition, the filling amount of the resin in the reaction stage, which is a post process, was 71% with respect to the absolute dry weight of the cedar board. At this stage, the resin is not cured (heat treatment).

C. Next, the cedar board material impregnated with the resin (resin is in an unreacted state and the wood material is in a raw material state) is molded into a predetermined size and a predetermined shape, and a wooden assembly part (1a 1b) was produced (see FIG. 2). In Example 1, since a lattice-patterned braid was produced, a plurality of vertical bars (1a) and a plurality of horizontal bars (1b) were prepared. Each of these bars (1a, 1b) was provided with a cut. The depth of the cut was half the height of the crosspiece, and the width of the cut was the same as the width of the crosspiece (see FIG. 2).

  Next, the prepared assembly parts (1a, 1b) were assembled in accordance with the cuts to produce (temporarily assembled) a lattice-patterned assembly (2) (see FIGS. 3 to 5).

  Next, the cedar board material (resin is in an unreacted state and the wooden material is in a raw material state) subjected to the same resin impregnation as that used to produce the wooden braiding parts (1a, 1b) is placed in the gap of the braiding ( A plurality of wooden piece parts (3) were produced by molding according to the size and shape of the lattice space (see FIG. 6).

  Next, each piece component (3) was assembled in the lattice space of the assembly (2) (see FIGS. 6 to 8), and the assembly (2) and the piece component (3) were temporarily assembled. Here, the assembly pattern formed by assembly components (1a, 1b) and piece components (3) was confirmed (see FIG. 9). From this state, the ends of the bars protruding on the four sides were cut off to complete the temporary assembly of the braided pattern block (4).

D. Pattern block production process Here, the kumiko pattern block (4) is disassembled once, and the one-pack type wet curable urethane resin adhesive is applied to the contact surface between the wooden kumiko parts (1a, 1b) and the wooden piece parts (3). (Y778W, manufactured by Miki Riken Kogyo Co., Ltd.) was applied and assembled again in a design box press. In this state, while confirming the kumiko pattern and dimensions, pressing was performed from four sides, and the kumiko pattern block (4) was completed after waiting for wet curing of the one-component wet-curable urethane resin adhesive.

  On the surface of the braided pattern block (4), the lattice pattern formed by the wooden braided parts (1a, 1b) and the grain pattern and color of the surface of each wooden piece part (3) appear. In the first embodiment, the lattice pattern made of cedar white hand (sapwood) is arranged while changing the wood grain pattern and color of the wooden piece part (3) made of cedar white hand (sapwood) and cedar red hand (core material). (See FIG. 9). In the present embodiment, the wood pattern of each wooden piece part (3) is a square, and is arranged so that the directions of the neighboring wooden piece parts (3) intersect each other (FIG. 9). reference).

  In the braided pattern block (4) in this state, the adhesion between the wooden braid parts (1a, 1b) and the wooden piece part (3) is completed by wet curing of a one-component wet-curing urethane resin adhesive. However, the reaction hardening of each resin component in the treatment liquid impregnated in each component is not yet completed, and each component is in a raw material state containing each resin component and moisture (resin aqueous solution).

E. Single plate process Next, a single plate is produced from this braided pattern block (4). In Example 1, the kumiko pattern block (4) was sliced thinly by cutting with a wood slicer to obtain a single plate having a kumiko pattern on the surface. As described above, the braided pattern block (4) is in a state of a piece of wood board, with each component firmly bonded by a one-component wet curable urethane resin adhesive. On the other hand, as described above, each component is in a raw material state as the reaction curing of each resin component has not yet been completed. By being in this state, each part maintains the flexibility of the wood, and the braided pattern is not distorted or destroyed in the cutting process by the slicer.

F. Resin Reaction Step As described above, the veneer thinly sliced in a state where the beauty of the kumiko pattern is maintained, here, each resin component impregnated inside is reacted and cured. Specifically, after drying a veneer sliced to a thickness of 3 mm, heat treatment was performed at 120 ° C. for 3 minutes to complete the reaction of the impregnating resin, and each resin component was reacted and cured. In the present Example 1, the processing liquid of the above-mentioned composition is impregnated, and the dimensions and shape do not change even if the single plate is dried and heat-treated by reaction hardening of these resin components. In this way, a kumiko patterned wood veneer (5) was obtained (see FIG. 1).

  A beautiful lattice pattern made of cedar white hands (sapwood) appears on the surface of the kumiko pattern wood veneer (5). On the other hand, in this lattice pattern space, wooden piece parts made of cedar white hand (sapwood) and cedar red hand (core material) are arranged so that they cross each other, and the beautiful grain structure and color change. A pattern is represented (see FIG. 1). In this state, the braided decorative veneer (5) is in a state in which the resin is cured inside, and has good surface strength as well as dimensional stability.

  Here, the practicality (dimensional stability) of the kumiko-pattern wood decorative veneer according to Example 1 was evaluated. Hereinafter, the evaluation method and the evaluation result will be described.

Shrinkage test (evaluation of dimensional stability):
A kumiko-pattern wood veneer veneer sliced to a thickness of 3 mm was used as a test piece. The evaluation of dimensional stability against changes in moisture content is based on the thickness direction (mesh direction), width direction (grain direction) of the test piece when a wood material with a high moisture content in the raw material state is dried to the absolutely dry state. Evaluation was made based on the value of the maximum change rate (shrinkage rate) of the dimension in the length direction (corresponding to the radial direction, tangential direction, and fiber direction of wood). Furthermore, the value of the maximum rate of change of the volume multiplied by the dimensions of each side in the thickness direction (grid direction), width direction (plate direction), and length direction (fiber direction) was also evaluated.

  As a result of evaluation by this method, the maximum rate of change (shrinkage rate) of each dimension in the thickness direction, width direction, and length direction of the kumiko patterned veneer was all 3% or less. Further, the value of the maximum rate of change in volume was 4% or less. When the value of the maximum rate of change in dimensions when the wood material with a high moisture content in the raw material state is dried to an absolutely dry state is 3% or less, and the value of the maximum rate of change in volume is 4% or less This is because there is no warping or twisting of the braided wood veneer veneer due to the change in moisture content, and the wall material or the composite material of the braided wood veneer veneer via an adhesive. Since flooring or the like is not peeled off from the base material, it is favorable as a building interior material such as a wall material or flooring and a surface material of practical furniture.

  In the second embodiment, a method for manufacturing a wood veneer veneer with a parquet pattern will be described. FIGS. 10-12 is a figure which shows each manufacturing step of the parquet pattern wood decoration veneer which concerns on the present Example 2. FIG.

A. Process liquid adjustment process In this Example 2, the impregnation process of the process liquid shown below was given to the cedar board | plate material which performed the same drying process (kiln dry) as the said Example 1. FIG. In the treatment liquid of this Example 1, an aqueous solution (solid content: 40% by weight) of a compound obtained by reacting 2-imidazolidinone and glyoxal in equimolar numbers as the first component was 104 g / liter, and the second component. 470 g / liter of an aqueous solution of 1,3-bis (hydroxyethyl) -4,5-dihydroxy-2-imidazolidinone (solid content: 40% by weight) as a catalyst and an aqueous magnesium chloride solution (solid content: 25% by weight) as a catalyst An aqueous solution containing 99 g / liter) was prepared.

B. Resin impregnation step In Example 2, the resin impregnation step was performed in the same manner as in Example 1 above. The amount of impregnation in the impregnation stage (stage liquid pressurization method) was 270% with respect to the weight of the cedar board. Moreover, the filling amount of the resin in the reaction stage as a post-process was 60% with respect to the absolute dry weight of the cedar board. At this stage, the resin is not cured (heat treatment).

C-1. Next, the cedar board material impregnated with the resin (resin is in an unreacted state and woody material is in a raw material state) is molded into a predetermined size and shape, and the fiber direction of the grain is long. A wood board piece (10) having a scale was obtained (see FIG. 10-1). A plurality of the wood board pieces (10) are prepared, and a one-component wet-curing urethane resin adhesive (Y778W, manufactured by Miki Riken Kogyo Co., Ltd.) is applied to the side surface, and laminated and bonded in a design box press. A laminate (20) was produced (see FIG. 10-2). This laminated board (20) is integrally laminated by unifying the fiber direction of the grain in the longitudinal direction of each wood board piece (10).

  Next, the laminated board (20) was cut | disconnected in the direction parallel to the elongate direction of a timber board piece (10), and several elongate wooden parquet parts (21) were prepared. On the surface of this wooden parquet part (21), a joining layer in which several pieces of wood board (10) are laminated in parallel, and the fiber direction of the grain parallel to this joining layer are of the wooden parquet part (21). Appears parallel to the long direction. On the other hand, another laminated board (20) produced in the same manner was cut in a direction perpendicular to the longitudinal direction of the wood board piece (10) to prepare a plurality of wooden parquet parts (22). On the surface of the wooden parquet part (22), a joining layer in which a number of pieces of wood board (10) are laminated in parallel and the fiber direction of the grain parallel to the joining layer are the length of the wooden parquet part (22). Appears perpendicular to the scale direction.

  Thus, on the surface of the wooden parquet part (21) and the surface of the wooden parquet part (22), respectively, a joining layer in which the wood board pieces (10) are laminated in parallel and a grain fiber parallel to the joining layer. The directions appear at angles different from each other (in the second embodiment, orthogonal angles).

D-1. Next, in FIG. 11 showing the second stage of manufacturing, a one-part wet curable urethane resin adhesive (Y778W, Miki) is attached to the side of the wooden parquet part (21) and the side of the wooden parquet part (22). RIKEN KOGYO CO., LTD.) Was applied and joined alternately in a design box press to obtain a parquet block (30) (see FIG. 11-1). On the surface of the parquet block (30), the joining layer in which the wood board pieces (10) are laminated in parallel and the fiber direction of the grain parallel to the joining layer appear to be orthogonal to each other and are complicated. Parquet pattern is expressed.

  In the parquet block (30) in this state, the adhesion between the wooden parquet part (21) and the wooden parquet part (22) is completed by the wet curing of the one-component wet-curing urethane resin adhesive. The reaction curing of each resin component in the processing liquid impregnated in the parts is not yet complete, and each part is in a raw material state containing each resin component and moisture (resin aqueous solution) to maintain flexibility. Yes.

  Here, the parquet block (30) may be thinly sliced to provide a parquet-patterned wood veneer having a parquet pattern on the surface. In Example 2, a more complicated parquet pattern was expressed.

  The other parquet pattern block (40) is produced in the same manner as the parquet pattern block (30) is produced as described above. In this parquet block (40), the side of the wooden parquet part (21) and the side of the wooden parquet part (22) are alternately joined in the same manner as the parquet block (30) (FIG. 11-2). reference). However, the parquet block (30) and the parquet block (40) mutually change the joining order of the wooden parquet part (21) and the wooden parquet part (22) (FIGS. 11-1 and 11-). 2).

C-2. Next, a plurality of new wooden parquet parts (31) were prepared by cutting the parquet block (30) from one end. Similarly, a parquet block (40) was cut from one end to prepare a plurality of new wooden parquet parts (41). In the new wooden parquet part (31) and the new wooden parquet part (41), the joining layer in which the wood board pieces (10) are laminated in parallel and the fiber direction of the grain parallel to the joining layer are integrated. The left and right sides of the grid are alternately represented by grids in which the bonding layer and the fiber direction are orthogonal to each other. (See FIGS. 11-1 and 11-2).

D-2. Next, in FIG. 12, which shows the final stage of production, a one-component wet curable urethane resin adhesive (on the side surface of the new wooden parquet part (31) and the side surface of the new wooden parquet part (41)) Y778W (manufactured by Miki Riken Kogyo Co., Ltd.) was applied and joined alternately with a laminating press to obtain a new parquet block (50) (see FIG. 12-1). On the surface of this new parquet block (50), the joining layer in which the wood board pieces (10) are laminated in parallel and the fiber direction of the grain parallel to this joining layer constitute a grid, On the front, back, left and right of the mesh, meshes in which the bonding layer and the fiber direction are orthogonal appear alternately, and a more complicated parquet pattern is expressed.

  In the new parquet block (50) in this state, the adhesion between the new wooden parquet part (31) and the new wooden parquet part (41) is completed by wet curing of a one-component wet-curing urethane resin adhesive. However, the reaction hardening of each resin component in the treatment liquid impregnated in each part is not yet complete, and each part is in a raw material state containing each resin component and moisture (resin aqueous solution). Maintains flexibility.

E. Single plate process Next, a single plate is produced from this new parquet block (50). In Example 2, a new parquet block (50) was thinly sliced by cutting with a wood slicer to obtain a veneer with a complex parquet pattern on the surface. As described above, the new parquet block (50) is in a state of a piece of wood board, with each component firmly bonded by a one-component wet-curable urethane resin adhesive. On the other hand, as described above, each component is in a raw material state as the reaction curing of each resin component has not yet been completed. By being in this state, each component maintains the flexibility of the wood, and the parquet pattern is not distorted or destroyed in the cutting process by the slicer.

F. Resin reaction step As described above, the veneer thinly sliced in a state where the beauty of the parquet pattern is maintained, here, the resin components impregnated inside are reacted and cured. Specifically, after drying a veneer sliced to a thickness of 3 mm, heat treatment was performed at 120 ° C. for 3 minutes to complete the reaction of the impregnating resin, and each resin component was reacted and cured. In the present Example 2, the treatment liquid having the above-mentioned composition is impregnated, and the dimensions and shape do not change even if the single plate is dried and heat-treated by reaction hardening of these resin components. In this way, a parquet-patterned wood decorative veneer (51) was obtained (see FIG. 12-2).

  On the surface of this parquet-patterned wood decorative veneer (51), a joining layer in which wood board pieces (10) made of cedar board are laminated in parallel and the fiber direction of the grain parallel to the joining layer are integrated. A grid is formed, and grids in which the bonding layer and the fiber direction are orthogonal appear alternately on the front, back, left, and right of the grid to express a more complicated parquet pattern (see FIG. 12-2). In this state, the parquet-patterned wood decorative veneer (51) is in a state in which the resin is cured therein, and has good surface strength as well as dimensional stability.

  Here, the practicality (dimensional stability) of the parquet-patterned wood veneer (51) according to Example 2 was evaluated. In Example 2, the same shrinkage rate test (evaluation of dimensional stability) as in Example 1 was adopted. Hereinafter, the evaluation result will be described.

  As a result of evaluation by this method, the maximum change rate (shrinkage rate) of each dimension in the thickness direction, the width direction, and the length direction of the parquet pattern wood veneer was all 3% or less. Further, the value of the maximum rate of change in volume was 4% or less. When the value of the maximum rate of change in dimensions when the wood material with a high moisture content in the raw material state is dried to an absolutely dry state is 3% or less, and the value of the maximum rate of change in volume is 4% or less The wall content and flooring are a combination of a parquet wood veneer veneer and a composite with an adhesive on the parquet veneer veneer veneer due to changes in moisture content. And the like are not peeled off from the base material.

  Specific examples 1 to 3 of the parquet pattern of the parquet pattern wood veneer produced in Example 2 are shown in FIGS. 13 to 15. FIG. 13 shows a checkered pattern, which is one of the traditional patterns of marquetry. FIG. 14 shows an arrow feather pattern, and FIG. 15 shows a checkered pattern with a change. Both express a complicated parquet pattern.

  As described above, according to the present invention, the present invention has excellent design properties due to a geometric pattern such as a beautiful kumiko pattern or a parquet pattern, is suitable for stable mass production, and is required in a practical field. It is possible to provide a method for producing a wooden veneer veneer capable of ensuring

In implementing the present invention, not only the above-described embodiments but also the following various modifications may be mentioned.
(1) In the first embodiment, the lattice pattern kumiko is used as a skeleton. However, the present invention is not limited to this, and a kumiko pattern veneer is manufactured using a kumiko having a more complicated shape as a skeleton. You may do it.
(2) In the first embodiment, the arrangement of the wooden piece parts is arranged so that the directions of the meshes intersect with each other. However, the arrangement is not limited to this, and the wooden piece parts with different grain patterns or different colors are used. You may make it arrange | position, changing wooden piece components.
(3) In the first embodiment, the arrangement of the wooden piece parts is arranged so that the directions of the meshes intersect with each other. However, the arrangement is not limited to this. You may make it show the change of. As a result, a kumiko pattern and a parquet pattern can be fused to produce a more complex and beautiful woody veneer veneer.
(4) In Example 2 described above, the joining portion of each wooden parquet part is joined so that the joining layer and the fiber direction of the grain parallel to the joining layer are orthogonal to each other. Instead, for example, the joining may be performed by changing the angle such as 30 degrees, 45 degrees, and 60 degrees. By giving a change to such a combination, a high degree of design can be expressed in the parquet pattern.
(5) In Example 2 above, the color of each wooden parquet part is not described, but by arbitrarily combining the colors of each wooden parquet part, a high degree of design can be expressed by the parquet pattern. .
(6) In Example 2 above, the wood grain pattern of each wooden parquet part is not described, but a high degree of design is expressed by the parquet pattern by arbitrarily combining the wood grain pattern of each wooden parquet part. Can do.
(7) In Example 1 and Example 2 described above, the wood veneer veneer is sliced thinly by cutting with a wood slicer, but is not limited to this, and the plate is processed thicker. You may make it do.
(8) In Example 1 and Example 2 above, cedar wood was used as the wood material used as the starting material for the wood veneer, but this is not a limitation, and examples include cypress wood, teak wood, and pine. Various tree species such as timber can be used.

1a, 1b ... Wooden assembly parts, 2 ... Assembly, 3 ... Wooden piece parts,
4 ... Kumiko pattern block, 5 ... Kumiko pattern wood veneer,
10 ... wood board pieces, 20 ... laminated board, 21, 22 ... wooden parquet parts,
30, 40 ... Parquet block 31, 41 ... New wooden parquet parts,
50 ... New parquet block, 51 ... Parquet wood veneer.

Claims (14)

In the method of manufacturing a wooden decorative veneer in which a geometric pattern formed by combining a plurality of wooden parts appears on the surface,
A resin impregnation step of impregnating a wooden material constituting the wooden part with a resin for dimension stabilization treatment;
In a state in which the resin for dimension stabilization treatment is in an unreacted state, a component manufacturing step for manufacturing the wooden component from the wooden material after resin impregnation,
In a state where the resin for dimension stabilization treatment is in an unreacted state, by applying an adhesive resin to the wooden part and adhering each wooden part, a pattern block making process for making a pattern block;
The adhesive resin is reacted and cured to complete adhesion, and the dimension stabilizing treatment resin is unreacted, and the pattern block is ground to a predetermined thickness so that each pattern appears on the surface. A single plate process for producing a single plate by processing or cutting,
And a resin reaction step of completing the dimension stabilization treatment by reaction-curing the resin for dimension stabilization treatment impregnated in an unreacted state on the veneer after the veneering step. Single plate manufacturing method.   The geometric pattern is a parquet pattern, the wooden part is a wooden parquet part constituting the parquet pattern, and the pattern block is a parquet pattern block obtained by bonding the wooden parquet part. Item 2. A method for producing a wood veneer veneer according to item 1.   The geometric pattern is a kumiko pattern, and the wooden part is a wooden kumiko part and a wooden piece part constituting the kumiko pattern, and the pattern block bonds the wooden kumiko part and the wooden piece part. 2. The method for producing a wood veneer veneer according to claim 1, wherein the block is a kumiko pattern block. In the component manufacturing process,
The wooden piece parts are produced so that the wooden piece parts can be fitted to the gap parts of the sets formed by the wooden piece parts, with respect to the set formed by assembling the wooden piece parts,
In the pattern block manufacturing process,
4. The wooden makeup according to claim 3, wherein when the wooden piece parts are fitted into the gap portions, the direction of the wood grain pattern on the surface of each wooden piece part is changed to produce a braided pattern block. Single plate manufacturing method. In the component manufacturing process,
The wooden piece parts are produced so that the wooden piece parts can be fitted to the gap parts of the sets formed by the wooden piece parts, with respect to the set formed by assembling the wooden piece parts,
In the pattern block manufacturing process,
4. The woody material according to claim 3, wherein, when the wooden piece parts are fitted into the gap portions, a kumiko pattern block is produced using a plurality of different patterns for the wood grain pattern on the surface of each wooden piece part. A method for producing a decorative veneer. In the component manufacturing process,
The wooden piece parts are produced so that the wooden piece parts can be fitted to the gap parts of the sets formed by the wooden piece parts, with respect to the set formed by assembling the wooden piece parts,
In the pattern block manufacturing process,
4. The wooden makeup according to claim 3, wherein when the wooden piece part is fitted into the gap portion, a kumiko pattern block is produced using a plurality of different colors for the surface color of each wooden piece part. Single plate manufacturing method. In the component manufacturing process,
The wooden piece parts are produced so that the wooden piece parts can be fitted to the gap parts of the sets formed by the wooden piece parts, with respect to the set formed by assembling the wooden piece parts,
4. The method for manufacturing a woody veneer veneer according to claim 3, wherein the wooden piece part is produced from a parquet block produced by applying an adhesive resin to a wooden parquet part and bonding the parts. . In the resin impregnation step,
The dimension stabilization treatment resin impregnated in the wood material is a first component composed of an addition product of a cyclic urea compound and glyoxal,
A second component consisting of 4,5-dihydroxy-2-imidazolidinone or a derivative thereof,
In the resin reaction step,
The method for producing a woody veneer veneer according to any one of claims 1 to 7, wherein the first component and the second component impregnated in an unreacted state on the veneer are reactively cured. . In addition to the first component and the second component, the resin for dimension stabilization treatment contains a third component made of glycols,
In the resin reaction step,
The woody makeup according to any one of claims 1 to 8, wherein the third component impregnated in an unreacted state on the veneer is reacted and cured together with the first component and the second component. Single plate manufacturing method.   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 veneer according to any one of claims 1 to 9.   The second component is 1,3-dimethyl-4,5-dihydroxy-2-imidazolidinone, 1,3-bis (hydroxymethyl) -4,5-dihydroxy-2-imidazolidinone, 1,3- The woody makeup unit according to any one of claims 1 to 10, comprising at least one selected from the group consisting of bis (hydroxyethyl) -4,5-dihydroxy-2-imidazolidinone. A manufacturing method of a board. In the pattern block manufacturing process,
The method for producing a wooden decorative veneer according to any one of claims 1 to 11, wherein the adhesive resin for adhering the wooden parts is a wet curable urethane resin adhesive.   A wood veneer veneer produced by the method for producing a wood veneer veneer according to claim 1.   When the reaction hardening of the resin for dimension stabilization treatment impregnated in the wood material constituting the wood part is completed, the maximum volume when the wood material having a high moisture content in a raw material state is dried to an absolutely dry state The value of the rate of change is 4% or less, and the values of the maximum rate of change in the three dimensions of thickness, width, and length are all 3% or less. Wood veneer veneer.