JP2013010328A - Method of manufacturing colored wood, the colored wood, veneer, and building material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a colored wood free from unevenness of coloring and easy to handle, the colored wood, veneer, and building materials.SOLUTION: Impregnation is performed under reduced pressure and pressure while immersing a lamina in acetone of 10 in solubility index and then the lamina is pulled up from the acetone and is subjected to pressure reduction processing to remove surplus acetone in the lamina. Impregnation is performed under reduced pressure and pressure while immersing the lamina in a dye solution containing 1 wt.% of a semi level-dyeing type acid dye, 20 wt.% of urea as a dissolution aid, and 79 wt.% of water as a dye solvent, and then the lamina is pulled up from the dye solution and is subjected to pressure reduction processing to remove surplus dye solution in the lamina. Many laminas L so formed are laminated and bonded to form a flitch F, and the flitch F is cut by a slicer to form 0.3 mm-thick wet veneer SP.

Description

  The present invention relates to a method for producing colored wood without uneven coloring, colored wood, veneer, and building material.

  For example, a decorative veneer such as a veneer is manufactured by bonding a large number of colored laminaes to form a laminated flitch and slicing the laminated flitch. In order to color the lamina, it is considered that the lamina is impregnated into the lamina by immersing the lamina in the aqueous dye solution for a long time, or by performing a pressure reduction and pressurizing treatment while the lamina is immersed in the aqueous dye solution. It is done.

JP 59-222304 A JP-A-62-148207

  However, the winter part of wood, which has more extractable components than the summer part, is easy to repel water and cannot be impregnated with the dye aqueous solution as described above. The part cannot be colored.

  In addition, since the dye has a greater affinity for wood than the affinity for water, when impregnating lamina with an aqueous dye solution, most of the dye is separated and adsorbed from the water at the mouth of the lamina. Even when pressure treatment is performed, the dye cannot be transported with water to the central portion of the lamina, and the central portion of the lamina cannot be colored.

  As described above, the method of impregnating the lamina with the aqueous dye solution has a problem that uneven dyeing occurs and the lamina cannot be colored neatly.

  In order to solve the problem of uneven dyeing, it is conceivable to impregnate the lamina with a dye solution in which a dye is dissolved in an organic solvent. However, when an organic solvent is used, the lamina impregnated with the dye solution is ignited. Because it becomes easy, the new problem that handling of lamina becomes difficult occurs.

  Accordingly, an object of the present invention is to provide a method for producing colored wood that has no uneven coloring and is easy to handle, and a colored wood, veneer, and building material.

  In order to solve the above-mentioned problems, the invention according to claim 1 includes a solvent impregnation step of impregnating wood with a water-soluble organic solvent, and a decompression treatment on the wood impregnated with the water-soluble organic solvent in the solvent impregnation step. A coloring process comprising: a surplus solvent removing step for removing surplus water-soluble organic solvent by performing a step, and a dye impregnation step for impregnating the wood from which the surplus water-soluble organic solvent has been removed in the surplus solvent removing step with a dye aqueous solution. A method for producing wood is provided.

  The invention according to claim 2 is the method for producing colored wood according to claim 1, wherein the excess dye aqueous solution is obtained by subjecting the wood impregnated with the dye aqueous solution in the dye impregnation step to a pressure reduction treatment. It is characterized by having an excess dye removing step for removing.

  In order to solve the above problems, the invention according to claim 3 includes a dye impregnation step of impregnating wood with a dye solution obtained by dissolving a dye in a water-soluble organic solvent, and impregnating the dye solution in the dye impregnation step. The excess dye solution removing step for removing the excess dye solution by performing a decompression treatment on the wood, and the water impregnation step for impregnating water to the wood from which the excess dye solution is removed in the excess dye removal step The manufacturing method of the colored wood provided with these is provided.

  The invention according to claim 4 is the method for producing colored wood according to claim 3, wherein surplus water is removed by subjecting the wood impregnated with water in the water impregnation step to a reduced pressure treatment. It is characterized by having a water removal step.

  Further, the invention according to claim 5 is the method for producing colored wood according to claim 1, 2, 3 or 4, wherein a semi-level acid dye is used as the dye, and the water-soluble organic solvent is A solubility index of 9.5 to 15.0 is used. Examples of the water-soluble organic solvent having a solubility index of 9.5 to 15.0 include acetone, isopropanol, acetonitrile, dimethylformamide, ethanol, cresol, ethylene glycol, phenol, and methanol.

  The invention according to claim 6 provides a colored wood produced by the production method according to claim 1, 2, 3, 4 or 5.

  Moreover, the invention which concerns on Claim 7 provides the single board formed by slicing the laminated material formed with the colored wood of Claim 6.

  The invention according to claim 8 provides a building material using the veneer according to claim 7 as a surface material.

  As described above, in the method for producing colored wood according to the first aspect of the present invention, before the wood is impregnated with the dye aqueous solution, the wood is once impregnated with the water-soluble organic solvent, and the excess water-soluble organic solvent is removed. Thus, since the dye aqueous solution is impregnated, the dye is not directly adsorbed to the wood, but is once adsorbed to the water-soluble organic solvent and then adsorbed to the wood. Therefore, in this production method, it is possible to dye the winter eye part and the middle part of the wood, and the colored wood of the invention according to claim 6 produced by this production method has an effect that uneven coloring does not occur. can get.

  Further, since the manufactured colored wood is in a wet state with water, it is not flammable, easy to handle, and has good cutting characteristics when slicing to produce a single plate.

  In particular, in the method for producing colored wood according to the second aspect of the present invention, the excess dye aqueous solution is removed by subjecting the wood impregnated with the dye aqueous solution to a reduced pressure treatment. When the stencil is manufactured, the excess dye aqueous solution does not scatter to the surroundings, and the moisture content of the colored wood is reduced to about 70%, and the sliced veneer is hot-pressed to a wooden substrate such as plywood. Thus, it is possible to easily perform hot pressing when manufacturing a decorative board. Further, since the water-soluble organic solvent remaining in the colored wood is discharged together with the excess dye aqueous solution, there is an advantage that the residual amount of the water-soluble organic solvent in the colored wood is further reduced.

  Further, in the method for producing a colored wood according to the invention of claim 3, since the wood is impregnated with a dye solution obtained by dissolving a dye in a water-soluble organic solvent having a good affinity for the winter eye part of wood, The winter part of wood can also be dyed, and since the dye has a better affinity for water-soluble organic solvents than water, the dye separates from the water-soluble organic solvent at the mouth of the wood and is strong against wood. When the wood is impregnated with the dye solution without being adsorbed, the dye can move through the wood together with the water-soluble organic solvent. Therefore, in this production method, it is possible to dye winter eyes and dye the central portion of the wood, and the colored wood of the invention according to claim 6 produced by this production method has an effect that uneven coloring does not occur. It is done.

  Further, after impregnating the wood with the dye solution, the excess dye solution was removed, and further, the wood was impregnated with water, so the colored wood produced was wet with water, It is not flammable and easy to handle, and also has good cutting characteristics when slicing to produce a single plate.

  In particular, in the method for producing a colored wood of the invention according to claim 4, the water content of the colored wood is 70% because the excess water is removed by performing a decompression treatment on the wood impregnated with water. When the sliced veneer is hot-pressed on a woody base material such as plywood to produce a decorative board, the effect that hot-pressing can be easily performed is obtained. Further, since the water-soluble organic solvent remaining in the colored wood is discharged together with the excess water, there is an advantage that the residual amount of the water-soluble organic solvent in the colored wood is further reduced.

  Further, in the method for producing colored wood of the invention according to claim 5, since a semi-level dyeing acid dye is used as a dye, there is no leaching to water, and a urethane resin paint or UV paint is applied. There is no color loss. Moreover, since the thing with a solubility index of 9.5-15.0 is used as a water-soluble organic solvent, the solubility of a semi-level dyeing acid dye is also good.

It is process drawing which shows the manufacturing method of the single plate using the colored wood which is one Embodiment of this invention.

  Hereinafter, although the manufacturing method of colored wood of this invention and colored wood are demonstrated with reference to Table 1, the colored wood of this invention is not limited to these Examples.

Example 1
〔Preprocessing〕
After laminating L800mm × W90mm × H50mm made of beach desiccant in acetone, which is a water-soluble organic solvent having a solubility index of 10, left for 30 minutes under a reduced pressure of 0.06 MPa relative to atmospheric pressure, 1 After leaving for 1 hour under a pressure of only 0.06 MPa, the lamina was impregnated with acetone under reduced pressure and pressure, and then the lamina was pulled up from acetone and depressurized by 0.06 MPa relative to atmospheric pressure. Excess acetone in the lamina was removed by leaving it in the state for 30 minutes.
[Dyeing treatment]
The lamina thus pretreated was treated with a semi-level acid dye (“KAYANOL” (registered trademark) manufactured by Nippon Kayaku Co., Ltd.) 1% by weight, urea 20% by weight as a dissolution aid, and a dye solvent. After being immersed in an aqueous dye solution consisting of 79% by weight of water and allowed to stand for 30 minutes under a reduced pressure of 0.06 MPa relative to atmospheric pressure, it was allowed to stand for 1 hour under a pressure of 1.06 MPa. After performing pressure reduction and pressure impregnation to impregnate the dye aqueous solution, this lamina is pulled up from the dye aqueous solution and left to stand for 30 minutes under a reduced pressure of 0.06 MPa with respect to atmospheric pressure. The aqueous solution was removed.

(Example 2)
A colored wood was produced in the same manner as in Example 1 except that the pressure was reduced by 0.06 MPa from the reduced pressure during the pressure reduction and pressure impregnation in the dyeing treatment.

(Example 3)
In the pretreatment, colored wood was produced in the same manner as in Example 1 except that methanol having a solubility index of 14.5 to 14.8 was used as the water-soluble organic solvent.

Example 4
In the pretreatment, colored wood was produced in the same manner as in Example 2 except that methanol having a solubility index of 14.5 to 14.8 was used as the water-soluble organic solvent.

(Example 5)
[Dyeing treatment]
Dye composed of L800mm × W90mm × H50mm lamina made of beach desiccant, 1% by weight of semi-level dye (“Kayanol” (registered trademark) manufactured by Nippon Kayaku Co., Ltd.), 99% by weight of acetone as a dye solvent Immerse it in a solution, leave it for 30 minutes under a reduced pressure of 0.06 MPa relative to atmospheric pressure, and then let it stand for 1 hour under a pressure of 1.06 MPa, so that the lamina is impregnated with the dye solution. After the pressure impregnation, the lamina was pulled up from the dye solution and allowed to stand for 30 minutes in a state where the pressure was reduced by 0.06 MPa relative to the atmospheric pressure, thereby removing the excess dye solution in the lamina.
[Post-processing]
The lamina thus dyed is immersed in water, left for 30 minutes in a state where the pressure is reduced by 0.1 MPa relative to atmospheric pressure, and then left for 1 hour in a state where only 1.1 MPa is applied. After depressurizing / pressurizing impregnation of the lamina with water, the lamina is pulled out of the water and left to stand for 30 minutes in a state where it is depressurized by 0.1 MPa with respect to the atmospheric pressure. Was removed.

(Example 6)
In the pretreatment, colored wood was produced in the same manner as in Example 5 except that methanol having a solubility index of 14.5 to 14.8 was used as the dye solvent.

(Comparative Example 1)
Colored wood was produced in the same manner as in Example 1 except that no pretreatment was performed.

(Comparative Example 2)
A colored wood was produced in the same manner as in Example 5 except that no post-treatment was performed.

  About each coloring wood obtained in Examples 1-6 mentioned above and Comparative Examples 1 and 2, coloring unevenness, handling property, and slice suitability were evaluated, and each result was shown in Table 2.

  As can be seen from Table 2, the colored woods of Examples 1 to 6 had no uneven coloring, were not flammable and excellent in handleability, and could be sliced easily.

  On the other hand, the colored wood of Comparative Example 1 using water as the dye solvent was not flammable and excellent in handleability and could be easily sliced, but the lamina's mouth was darkly colored. On the other hand, the central portion of the lamina was hardly colored, and uneven coloring occurred.

  In addition, the colored wood of Comparative Example 2 using acetone, which is a water-soluble organic solvent, as the dye solvent was uniformly colored with no uneven coloring, but had a strong acetone odor and was ignited by static electricity or sparks during processing. Because of fear, it could not be sliced with a slicer. Even if slicing is possible, acetone evaporates immediately, so that the sliced veneer contracts, resulting in problems such as distorted dimensions and cracks.

  As described above, the colored wood (lamina) of Examples 1 to 6 has no uneven coloring, is not flammable, and can be easily sliced. it can. Specifically, as shown in FIG. 1, a large number of lamina L is laminated and bonded to create a flitch F, and this flitch F is cut with a slicer, so that a wet single plate SP having a thickness of 0.3 mm is obtained. Form. In addition, since wood is plasticized by water, in order to cut well, it is necessary to cut in a state with a high moisture content.

  The wet veneer SP formed in this way is made of nylon, frozen and stored for several days, then thawed at room temperature, and bonded to the surface of the substrate made of plywood to produce building materials such as floorboards. Can do. In addition, since wood shrinks by drying, it is necessary to adhere | attach until the moisture content falls below a fiber saturation point.

  In Examples 1 to 4 described above, after performing decompression and pressure impregnation to impregnate the lamina with the dye aqueous solution, the lamina is pulled up from the dye aqueous solution and subjected to a decompression treatment, whereby an excess dye aqueous solution in the lamina is obtained. In Examples 5 and 6, the lamina is impregnated with water under reduced pressure and pressure, and then the lamina is lifted from the water and subjected to reduced pressure treatment to remove excess water in the lamina. However, it is not always necessary to provide the final excess dye aqueous solution removal step and the excess water removal step. However, if a final removal step is provided, when a single plate is produced by slicing, excess dye aqueous solution does not scatter around and the moisture content of the colored wood is reduced to about 70%. Therefore, when producing a decorative board by hot pressing a sliced veneer onto a woody base material such as plywood, an effect that hot pressing can be easily performed is obtained, and water remaining in the colored wood is obtained. Since the organic organic solvent is discharged together with the excess dye aqueous solution and water, there is an advantage that the residual amount of the water-soluble organic solvent in the colored wood is further reduced.

  Moreover, in each Example mentioned above, in each process of pre-processing, dyeing | staining processing, and post-processing, although the decompression processing time is set to 30 minutes and the pressurization processing time is set to 1 hour, it is not limited to this. Each processing time may be set as appropriate in consideration of the colored state.

  Moreover, in each Example mentioned above, although acetone and methanol are used as a water-soluble organic solvent, it is not limited to this, A thing with a solubility index of 9.5 to 15.0 is selected suitably. Can be used. Specific examples include isopropanol, acetonitrile, dimethylformamide, ethanol, cresol, ethylene glycol, phenol and the like.

  Further, in Examples 1 to 4 described above, 20% by weight of urea is added as a dissolution aid to the aqueous dye solution, but the present invention is not limited to this, and the amount of urea added is 10 to 40% by weight. What is necessary is just to set suitably in the range.

  Moreover, in each Example mentioned above, although the pressure reduction and pressurization impregnation method is employ | adopted in each process of pre-processing, dyeing | staining process, and post-processing, if sufficient immersion time can be ensured, it will not necessarily be. It is not necessary to adopt a reduced pressure / pressure impregnation method.

  The present invention can be used when coloring and using wood.

L Lamina (colored wood)
F Flitch (Glulam)
SP wet veneer (single veneer)

Claims (8)

A solvent impregnation step of impregnating wood with a water-soluble organic solvent;
A surplus solvent removal step of removing excess water-soluble organic solvent by performing a reduced pressure treatment on the wood impregnated with the water-soluble organic solvent in the solvent impregnation step,
A method for producing colored wood, comprising: a dye impregnation step of impregnating wood from which excess water-soluble organic solvent has been removed in the excess solvent removal step with a dye aqueous solution.   The manufacturing method of the colored wood of Claim 1 provided with the excess dye removal process of removing the excess dye aqueous solution by performing a pressure reduction process with respect to the wood impregnated with the dye aqueous solution in the said dye impregnation process. A dye impregnation step of impregnating wood with a dye solution obtained by dissolving a dye in a water-soluble organic solvent;
For the wood impregnated with the dye solution in the dye impregnation step, the excess dye removal step of removing the excess dye solution by performing a reduced pressure treatment,
A method for producing colored wood, comprising: a water impregnation step of impregnating water into wood from which the excess dye solution has been removed in the excess dye removal step.   The manufacturing method of the colored wood of Claim 3 provided with the surplus water removal process of removing surplus water by performing a pressure reduction process with respect to the wood impregnated with water in the said water impregnation process. As the dye, a semi-level dye acid dye is used,
The method for producing colored wood according to claim 1, 2, 3, or 4, wherein the water-soluble organic solvent has a solubility index of 9.5 to 15.0.   A colored wood produced by the production method according to claim 1, 2, 3, 4 or 5.   A veneer formed by slicing the laminated material formed of the colored wood according to claim 6.   A building material using the veneer according to claim 7 as a surface material.

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