JP7246092B2 - Consolidated material of precious wood and its manufacturing method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a compacted material having a surface quality comparable to that of various precious woods and a feeling of weight comparable to that of ebony or rosewood, and a method for producing the same.

Wood is one of the resources whose depletion is feared on the earth. In addition, forests that produce wood are a source of carbon dioxide absorption and a cornerstone that supports biodiversity, and they are indispensable in considering global environmental protection, but there are concerns about their rapid decline.

Among timbers, timbers with excellent surface quality are also called premium timbers, and are particularly prized as rare and valuable. Among these precious woods, ebony and rosewood have been prized as precious woods for a long time because of their heavy, hard and dense materials, but the depletion of resources is of particular concern. In addition, ebony and rosewood are precious woods with high market value that are used for high-class furniture and fittings, and there is a demand for other woods with comparable surface quality and weight.

Therefore, attempts have been made to dye general-purpose lumber, which is relatively abundant in resources and available, to resemble high value-added lumber. However, dyeing using dyes cannot reproduce the natural color tone and surface quality of precious wood. Therefore, for example, in Patent Document 1 below, a wood treatment method is proposed in which wood is treated with high-pressure steam to change the properties of cellulose, hemicellulose, and lignin, which are the constituent components of wood, and color the whole wood brown. there is

JP-A-8-155909

By the way, the wood treatment method of Patent Document 1 is a method such as making the color of the wood brown to make the wood grain stand out, and does not provide excellent surface quality of precious wood. It is not possible to obtain lumber with superior surface quality and heavy feeling comparable to rosewood. Moreover, the obtained treated lumber does not have excellent physical properties comparable to those of precious lumber.

Therefore, the present invention deals with the above problems by processing general-purpose wood that is relatively abundant in resources and available, so that it has a surface quality comparable to that of precious wood, and can be used to produce ebony, rosewood, etc. To provide a compacted material of precious wood having a high market value which can be used for high-class furniture and fittings, and which has a weight feeling in addition to surface quality in some cases, and a method for producing the same.

In order to solve the above problems, the present inventors, as a result of intensive research, found that the above problems can be solved by consolidating a specific wood that can be processed into the target precious wood, and completed the present invention.

That is, the precious wood conditioning and consolidation material according to the present invention is
Compressed and fixed general-purpose timber with the target surface quality of precious timber,
The value of the color difference (ΔE ^* ab) from the precious wood in the color system (L ^* a ^* b ^* ) is 5 or less.

In addition , the present invention
In addition to the surface quality of the target precious wood, it has the same weight feeling as the precious wood,
It is characterized by having an air-dried density value within the range of 0.8 to 1.5 (g/cm ³ ) after compaction and fixation.

In addition , the present invention
The general-purpose wood is teak wood, and the target precious wood is walnut wood.

In addition , the present invention
The general-purpose wood is eucalyptus wood, and the target precious wood is ebony wood.

In addition , the present invention
The general-purpose lumber is mahogany, and the target precious wood is rosewood.

In addition , the present invention
In accordance with the "Brinell hardness test" specified in JIS Z 2101: 2009 (wood test method), the load when the depth of indentation into the surface of the test piece is 1/π (mm) is P (N) When the following formula (1),
H=P/10 (1)
The value of surface hardness H represented by is 25 (N/mm ² ) or more.

In addition, the present invention
In accordance with JIS Z 2101: 2009 (wood test method) "wear test", the mass of the test piece before measurement is m1 (mg), the mass of the test piece after the test is m2 (mg), the test machine The following formula (2), where A (mm2) is the area of the portion subjected to abrasion by the wear wheel of the test piece and ρ (g/ ^cm3 ) is the density of the test piece,
D=(m1−m2)/A・ρ (2)
is 0.12 (mm) or less.

In addition, the method for manufacturing precious wood conditioning and consolidation material according to the present invention includes :
The general-purpose lumber is compacted and fixed by heat-treating and compressing the general-purpose lumber in an atmosphere containing high-pressure steam using sealable molds having heating plates facing each other.

Further, in the method for manufacturing precious wood conditioning and consolidation material according to the present invention,
The heat treatment and compression treatment are characterized in that they are performed within a temperature range of 150° C. to 210° C. and a pressure range of 5 to 70 kg/cm ² for 10 minutes to 120 minutes.

According to the above configuration, the precious wood conditioning and consolidation material according to the present invention has the target surface quality of precious wood by consolidating general-purpose lumber. The surface quality is achieved by setting the value of the color difference (ΔE ^* ab) to 5 or less from the precious wood in the color system (L ^* a ^* b ^* ). Further, according to the above configuration, the precious wood conditioning and consolidation material according to the present invention has the weight feeling of the targeted precious wood by consolidating the general-purpose lumber. The feeling of weight is achieved when the value of the air-dried density after consolidation is within the range of 0.8 to 1.5 (g/cm ³ ).

Further, according to the above configuration, teak wood may be used as the general-purpose wood, and the target precious wood may be walnut. Alternatively, eucalyptus wood may be used as the general-purpose wood, and the target precious wood is ebony. Alternatively, mahogany may be used as the general-purpose lumber, and the target precious wood may be rosewood.

In addition, according to the above configuration, the precious wood conditioning and compacting material according to the present invention complies with the "Brinell hardness test" specified in JIS Z 2101:2009 (testing method for wood), and the depth of pressing into the surface of the test piece is The value of the surface hardness H indicated by the above formula (1) is 25 (N/mm ² ) or more, where P (N) is the load when the hardness becomes 1/π (mm). may be As a result, it is possible to more specifically exhibit the above effects.

In addition, according to the above configuration, the precious wood conditioning and compacting material according to the present invention conforms to the "wear test" specified in JIS Z 2101: 2009 (wood test method), and the mass of the test piece before measurement is m1 ( mg), m2 (mg) is the mass of the test piece after the test, A (mm ² ) is the area of the portion subjected to abrasion by the wear wheel of the testing machine, and ρ (g/cm ³ ) is the density of the test piece. Moreover, the value of the wear depth D shown in the above formula (2) may be 0.12 (mm) or less. As a result, it is possible to more specifically exhibit the above effects.

In addition, according to the above configuration, the method for manufacturing precious wood conditioning and compacting materials according to the present invention includes heat-treating and compressing general-purpose lumber in an atmosphere containing high-pressure steam using sealable molds having heating plates facing each other. do. As a result, the treated general-purpose wood is compacted and fixed, so that it has excellent physical properties and can be used for high-class furniture and fittings.

Further, according to the above configuration, the heat treatment and compression treatment may be performed within a temperature range of 150° C. to 210° C. and a pressure range of 5 to 70 kg/cm ² for 10 minutes to 120 minutes. As a result, it is possible to more specifically exhibit the above effects.

For these reasons, by processing general-purpose wood, which is relatively abundant in resources and available, it has a surface quality comparable to that of precious wood, and in the case of ebony and rosewood, it also has a sense of weight in addition to the surface quality. In addition, it is possible to provide a compacted material having excellent physical properties and a high market value that can be used for high-class furniture and fittings, and a method for producing the same.

1 is a cross-sectional view showing an overview of a consolidation apparatus used for consolidation in accordance with the present invention; FIG. 1. It is process drawing which shows the outline|summary of the process which manufactures precious wood conditioning consolidation material using the consolidation fixing apparatus of FIG.

Lumber called precious wood has excellent surface quality with surface changes such as heather and heavy color tone. In addition, ebony and rosewood have a high air-dried density (density in an air-dried state with a moisture content of 15% by mass), and have a feeling of weight and excellent physical properties. For example, ebony and rosewood have a deep color tone, high density, and excellent physical properties. According to various literature values, the air-dry density of ebony is in the range of 0.8-1.3 g/cm ³ , and the air-dry density of rosewood is 0.9-1.1 g/cm ^{3 .} within the range.

On the other hand, the value of air-dried density of general-purpose wood, which is relatively abundant and available, is lower than that of ebony and rosewood. For example, cedar (0.38 g/cm ³ ), cypress (0.41 g/cm ³ ), larch (0.53 g/cm ³ ), paulownia (0.29 g/cm ³ ), chestnut (0.60 g/cm ^{3 )} . ), Oak (0.68g/cm ³ ), Teak (0.60g/cm ³ ), Eucalyptus (0.70g/cm ³ ), Mahogany (0.48g/cm ³ ), Cherry (0.63g/cm ³ ) ), chestnut (0.60 g/cm ³ ), mulberry (0.62 g/cm ³ ), yew (0.48 g/cm ³ ), maple (0.69 g/cm ³ ), zelkova (0.70 g/cm ³ ) ) and so on.

The present inventor has studied the consolidation and plastic working of wood, and has been able to obtain a compacted material with excellent physical properties by consolidating general-purpose wood. In the process, it was confirmed that the color tone of the wood changed to dark brown as the value of the air-dried density increased. It was also confirmed that the change in color tone differs depending on the type of wood to be consolidated and the degree of consolidation.

Therefore, in the present invention, by consolidating a specific wood, it is possible to obtain a compacted material prepared from precious wood that has a feeling of weight and surface quality comparable to those of targeted precious wood and has excellent physical properties. In order to obtain a feeling of weight comparable to that of ebony or rosewood, it is necessary that the value of the air-dried density after consolidation is within the range of 0.8 to 1.5 g/cm ³ . If the air-dried density value is within the range of 0.8 to 1.5 g/cm ³ , the physical properties of the general-purpose lumber used are dramatically improved. The apparatus and method used for the consolidation and fixation of the present invention will be described later.

In addition, in order to obtain a surface quality close to that of precious wood, it is necessary to bring the three attributes (hue, brightness, and saturation) of the color of the consolidated precious wood closer to those of the targeted precious wood. Therefore, in the present invention, by consolidating the selected general-purpose wood for the target precious wood ^{, the color} difference (ΔE ^* ab ) must be 5 or less.

Here, the color system (L ^* a ^* b ^* ) is a color system standardized by the Commission Internationale de l'Eclairage (CIE) and adopted by JIS Z8729 in Japan. suitable for representing Also, the color difference (ΔE ^* ab) in this color system (L ^* a ^* b ^* ) is a numerical value representing the color difference between two objects, and is expressed by the following formula.

ΔE ^* ab=[(ΔL ^* ) ² +(Δa ^* ) ² +(Δb ^* ) ² ] ^1/2
The larger the value of this color difference (ΔE ^* ab), the greater the difference in color between the two objects to be compared. In the surface quality of wood, a color difference (ΔE ^* ab) value of 5 or less can give a fairly similar impression.

In the following, as examples of the consolidation material of precious wood according to the present invention, production of consolidation material of precious wood targeting ebony, rosewood and walnut using eucalyptus, mahogany and teak as general-purpose woods will be described. It should be noted that the present invention is not limited only to the examples and wood combinations shown below.

The present Example 1 relates to the production of a precious wood tone compacted material, using eucalyptus veneer as a general-purpose wood and targeting ebony. The eucalyptus material used (lemon eucalyptus) had an air-dry density value of 0.70 g/cm ³ before compaction and fixation.

In Example 1, the consolidation apparatus MC used in the above-described wood consolidation method (Patent No. 4787432) and plastic working wood (Patent No. 5138080) was used. First, a eucalyptus veneer W1 was prepared as a sample to be compacted and fixed.

This single plate W1 is heated, and a predetermined compressive force is applied to the heated single plate W1 from each consolidation direction to compress it. Furthermore, while maintaining this compressive force, the temperature is further raised and maintained at a predetermined temperature for a predetermined time, and then the temperature is lowered and cooled to complete the consolidation by consolidation. The term "consolidation and fixation" as used in the present invention refers to a state in which the consolidated veneer W1 (after consolidation and consolidation, referred to as precious wood conditioning and consolidation material X1) is fixed and does not recover its original shape.

As conditions for consolidation and fixation, for example, the predetermined temperature is within the temperature range of 150 to 210.degree. C., preferably within the temperature range of 170 to 200.degree. The time for maintaining this temperature range is appropriately selected depending on the object to be compacted, but is, for example, within the range of 10 minutes to 120 minutes, preferably within the range of 20 minutes to 60 minutes. . On the other hand, the compressive force to be applied from the direction of compaction is appropriately selected depending on the object to be compacted, but is preferably in the range of 5 to 70 kg/cm ² , for example.

Here, the consolidation device MC used in the present invention will be described. FIG. 1 is a cross-sectional view showing an outline of the consolidation device MC. In FIG. 1, the consolidation apparatus MC is composed of a press platen 10 divided vertically into two (an upper press platen 10A and a lower press platen 10B). This press platen 10 corresponds to a sealable mold for consolidation.

The upper press platen 10A and the lower press platen 10B are vertically divided to form an internal space IS and positioning holes 18 . The positioning hole 18 defines and regulates the position of the molding material before pressurization, and is formed in the lower press platen 10B such that its peripheral edge portion 10b faces the peripheral edge portion 10a of the upper press platen 10A. . A seal member 11 is formed on the peripheral edge portion 10a of the upper press platen 10A to seal the internal space IS and the positioning hole 18 within the range of vertical movement of the press platen 10A.

Further, the upper press platen 10A is provided with a pipe 12 having a pipe port 12a that communicates with the internal space IS from its upper surface side and supplies steam to the internal space IS and the positioning hole 18. As shown in FIG. A valve V4 is provided on the downstream side of the pipe 12 . On the other hand, the lower press platen 10B is provided with a pipe 13 that communicates with the internal space IS and the positioning hole 18 from the side thereof and has a pipe port 13a for discharging water vapor from the internal space IS. The pipe 13 is provided with a pressure gauge P2 for detecting the internal steam pressure, a valve V5 on the downstream side thereof, and a drain pipe 14 connected to the valve V5.

Further, the upper press platen 10A and the lower press platen 10B are formed with pipes 15 and 16 for raising the temperature to a predetermined temperature by passing high-temperature steam through the interior thereof. Pipes ST2 and ST3 branched from the pipe ST1 on the steam supply side and pipes ET1 and ET2 on the steam discharge side are connected to the . Valves V1, V2, V3 and a pressure gauge P1 for detecting the steam pressure in the pipe ST1 are arranged in the middle of these pipes ST1, ST2, ST3 on the steam supply side. is connected to a drain pipe 14 via a valve V6.

In FIG. 1, a press lift including a boiler unit for supplying steam to the pipe ST1 and a hydraulic mechanism for lifting/lowering the upper press platen 10A with respect to the lower press platen 10B on the fixed side of the press platen 10 and applying pressure. Equipment is omitted.

Further, a cooling water supply side pipe ST11 branches off from a cooling water supply side pipe ST11 for cooling to a desired temperature by passing low-temperature cooling water instead of water vapor through pipes 15 and 16 formed in the upper press platen 10A and the lower press platen 10B. The pipes ST12 and ST13 are connected to the pipes ST2 and ST3, respectively. Further, valves V11, V12 and V13 are arranged in the middle of the pipes ST11, ST12 and ST13 on the cooling water supply side. In addition, in FIG. 1, a cooling water supply device for supplying cooling water to the pipe ST11 is omitted.

Next, a manufacturing process for manufacturing the precious wood conditioning compacted material X1 from the veneer W1 using the consolidation apparatus MC configured as described above will be described along each process shown in FIG. First, in FIG. 2(a), the upper press platen 10A is raised with respect to the lower press platen 10B on the stationary side of the consolidation apparatus MC, and the veneer W1 arranged in advance under predetermined conditions is It is placed in the internal space IS and the positioning hole 18 formed by the press platen 10B.

Next, in FIG. 2(b), the upper press platen 10A is lowered with respect to the veneer W1 placed on the positioning hole 18 of the lower press platen 10B on the fixed side, and the upper press platen 10A is pressed vertically against the upper surface of the veneer W1. abut on. In this state, steam at a predetermined temperature (for example, 110° C. to 180° C.) is passed through the piping 15 of the upper press platen 10A and the piping 16 of the lower press platen 10B, and the internal space IS and the positioning hole 18 are heated to a predetermined temperature (for example, , 110° C. to 180° C.). In this state, the space formed by the internal space IS and the positioning hole 18 is not yet sealed.

Next, the compression force of the upper press platen 10A is set to a predetermined pressure (for example, 5 to 70 kg/cm ² ) with respect to the lower press platen 10B on the fixed side, and the veneer W1 is pressed between the upper press platen 10A and the lower press platen 10B. for a predetermined time (for example, 5 to 40 minutes). In order to prevent cracking, the compressive force at this time is desirably gradually increased according to the temperature rise of the single plate W1, that is, the state of heat conduction (internal temperature rise) of the single plate W1. It is preferable to set the heating and compression time in consideration of the time required for heat conduction. In this state, the space formed by the internal space IS and the positioning hole 18 is not yet sealed.

Next, in FIG. 2(c), when the peripheral edge portion 10a of the upper press platen 10A comes into contact with the peripheral edge portion 10b of the lower press platen 10B, the seal member 11 disposed on the peripheral edge portion 10a of the upper press platen 10A causes the upper The internal space IS formed by the press platen 10A and the lower press platen 10B and the positioning hole 18 are sealed. In this state, the inner space IS and the positioning hole 18 are kept sealed, and the compression force is maintained by the upper press platen 10A and the lower press platen 10B. Heat up.

In this state, the internal space IS and the positioning hole 18 are sealed as shown in FIG. Consolidated precious wood material that is maintained at a temperature (for example, 150 to 210°C) for a predetermined time (for example, 30 to 120 minutes), and does not return (expand) when the subsequent cooling compression is released. A heat treatment is performed to form X1. At this time, high-temperature and high-pressure steam pressure can flow freely between the peripheral surface of the veneer W1 and its interior via the internal space IS and the positioning hole 18 sealed by the upper press platen 10A and the lower press platen 10B. It's becoming

Next, in FIG. 2(d), when the heating and compression process is being performed in the closed state of the internal space IS and the positioning hole 18, the steam in the internal space IS and the positioning hole 18 is detected by the pressure gauge P2 as a vapor pressure control process. Pressure is detected and valve V5 is opened and closed as appropriate. As a result, high-temperature and high-pressure water vapor is discharged from the internal space IS and the positioning hole 18 through the pipe port 13a and the pipe 13 toward the drain pipe 14 side. Moisture in the internal space IS and the positioning hole 18 is removed, and the internal space IS and the inside of the positioning hole 18 are adjusted to have a predetermined vapor pressure.

Further, if necessary, a predetermined steam pressure can be supplied to the internal space IS via the pipe 12 connected to the valve V4 and the pipe port 12a (FIG. 2). As a result, the fixation of the heat compression treatment, that is, the fixation is further promoted.

Further, immediately before the heat compression by the upper press platen 10A and the lower press platen 10B shifts from the heat compression to the cooling compression, the valve V5 is opened as a vapor pressure control process, so that the internal space passes through the pipe port 13a and the pipe 13. High-temperature and high-pressure steam is discharged from the IS and the positioning hole 18 to the drain pipe 14 side.

Next, in FIG. 2(e), cooling water at room temperature is passed through the piping 15 of the upper press platen 10A and the piping 16 of the lower press platen 10B, so that the upper press platen 10A and the lower press platen 10B are heated to room temperature. It is cooled back and forth and held for a predetermined time (for example, 10 to 120 minutes) that varies depending on the material. At this time, the compressive force of the upper press platen 10A against the lower press platen 10B on the fixed side is kept at the same predetermined pressure (for example, 5 to 70 kg/cm ² ) as the pressure during the heat compression. The platen 10A and the lower press platen 10B are cooled.

Finally, in FIG. 2(f), the upper press platen 10A is lifted with respect to the lower press platen 10B on the fixed side, and the precious wood tone compacted material X1, which is the finished product, is taken out from the internal space IS and the positioning hole 18. , the series of processing steps ends.

A polishing treatment was performed to smooth the surfaces of the precious wood conditioning compacted material X1 and the untreated eucalyptus veneer W1 thus obtained. Next, the surfaces of the target ebony sample, precious wood-conditioned compacted material X1, and eucalyptus veneer W1 were colorimetrically measured. For colorimetry, a UV-visible spectrophotometer V-550 (JASCO Corporation) equipped with an integrating sphere was used. Table 1 shows the L ^* value, a ^* value, and b ^* value of the colorimetrically measured ebony sample, precious wood consolidated material X1, and eucalyptus veneer W1. Further, from these values, each color difference (ΔE ^* ab) between the ebony sample and precious wood tone compacted material X1 and between the ebony sample and eucalyptus veneer W1 was calculated. Table 1 shows the calculated values of each color difference (ΔE ^* ab).

In Table 1, the color difference (ΔE ^* ab) between the ebony sample and the precious wood tone compacted material X1 was 5 or less, indicating a color tone and surface quality close to those of the target ebony. On the other hand, each color difference (ΔE ^* ab) between the ebony sample and the eucalyptus veneer W1 was 20 or more, and the color tone was greatly different from the target ebony.

Next, the air dry densities of the precious wood consolidated material X1 and the untreated eucalyptus veneer W1 were measured. The air-dry density value of the eucalyptus veneer W1 before consolidation and fixing was 0.70 g/cm ³ , while the air-dry density value of the precious wood conditioning and compaction material X1 was 1.36 g/cm ³ . rice field.

Next, the physical properties of the precious wood tone compaction material X1 were evaluated. Evaluation of physical properties was confirmed by values of surface hardness (H) and wear depth (D). First, the surface hardness (H) was evaluated by a method based on the "Brinell hardness test" defined in JIS Z 2101:2009 (testing methods for wood). The hardness of the surface of ordinary wood, for example, broad-leaved trees (such as oak) is H=15 N/mm ² . On the other hand, the hardness of the surface of the precious wood preparation compacted material X1 was H=25 N/mm ² or more, showing good physical properties.

On the other hand, the abrasion depth (D) was evaluated by a method based on the "wear test" defined in JIS Z 2101:2009 (testing method for wood). The wear depth of ordinary wood such as hardwood (such as oak) is about D=0.14 mm. On the other hand, the abrasion depth of precious wood conditioning compacted material X1 was D=0.12 mm or less, showing good physical properties.

The present Example 2 relates to the production of precious wood tone compaction material X2, using a mahogany veneer W2 as a general-purpose lumber and targeting red sandalwood. The mahogany wood used had an air-dried density value of 0.48 g/cm ³ before compaction. In Example 2, the same consolidation apparatus MC as in Example 1 was used, and the consolidation conditions were the same as in Example 1, so description thereof will be omitted here.

Polishing treatment was performed to smoothen the surfaces of the obtained precious wood tone compacted material X2 and the untreated mahogany veneer W2. Next, the surfaces of the target rosewood sample, precious wood tone compaction material X2, and mahogany veneer W2 were colorimetrically measured. For colorimetry, a UV-visible spectrophotometer V-550 (JASCO Corp.) equipped with the same integrating sphere as in Example 1 was used. Table 2 shows the L ^* value, a ^* value, and b ^* value of the colorimetric rosewood sample, precious wood consolidated material X2, and mahogany veneer W2. Further, from these values, each color difference (ΔE ^* ab) between the rosewood sample and precious wood tone compacted material X2, and between the rosewood sample and mahogany veneer W2 was calculated. Table 2 shows the calculated values of each color difference (ΔE ^* ab).

In Table 2, the color difference (ΔE ^* ab) between the rosewood sample and the precious wood-prepared compacted material X2 was 5 or less, indicating a color tone and surface quality close to those of rosewood. On the other hand, the color difference (ΔE ^* ab) between the rosewood sample and the mahogany single plate W2 was 20 or more, and the color tone was greatly different from the target rosewood.

Next, the air dry densities of the precious wood consolidated material X2 and the untreated mahogany veneer W2 were measured. The mahogany veneer W2 had an air-dry density value of 0.48 g/cm ³ before being compacted and fixed, while the air-dry density value of the precious wood conditioning and compaction material X2 was 1.18 g/cm ³ . rice field.

Next, the physical properties of the premium wood preparation compacted material X2 were evaluated. The evaluation of physical properties was confirmed by the values of surface hardness (H) and wear depth (D) in the same manner as in Example 1 above. As a result, the hardness of the surface of the precious wood conditioning compacted material X2 was H=25 N/mm ² or more, indicating good physical properties. In addition, the abrasion depth of precious wood conditioning and compaction material X2 was D = 0.12 mm or less, showing good physical properties.

The present Example 3 relates to the production of a precious wood tone compaction material X3, which uses a teak veneer W3 as a general-purpose wood and targets walnut. The air-dried density value of the teak wood used before compaction was 0.60 g/cm ³ . In Example 3, the same consolidation apparatus MC as in Example 1 was used, and the consolidation conditions were the same as in Example 1, so the description is omitted here.

Polishing treatment was performed to smoothen the surface of the obtained precious wood-conditioned compacted material X3 and the untreated teak veneer W3. Next, the surface color of the target walnut sample, precious wood tone compaction material X3, and teak veneer W3 was measured. For colorimetry, a UV-visible spectrophotometer V-550 (JASCO Corp.) equipped with the same integrating sphere as in Example 1 was used. Table 3 shows the L ^* value, a ^* value, and b ^* value of the colorimetrically measured walnut sample, precious wood consolidated material X3, and teak veneer W3. Further, from these values, each color difference (ΔE ^* ab) between the walnut sample and the premium wood tone compaction material X3, and between the walnut sample and the teak veneer W3 was calculated. Table 3 shows the calculated values of each color difference (ΔE ^* ab).

In Table 3, the color difference (ΔE ^* ab) between the walnut sample and the precious wood tone compaction material X3 was 5 or less, indicating a color tone and surface quality close to those of walnut as the target. On the other hand, each color difference (ΔE ^* ab) between the walnut sample and the teak veneer W3 was 20 or more, and the color tone was greatly different from the target walnut.

Next, the air dry densities of the precious wood-conditioned compacted material X3 and the untreated teak veneer W3 were measured. While the teak veneer W3 had an air-dry density value of 0.60 g/cm ³ before being compacted and fixed, the air-dry density value of the precious wood consolidated material X3 was 0.80 g/cm ³ . rice field.

Next, the physical properties of precious wood tone compaction material X3 were evaluated. The evaluation of physical properties was confirmed by the values of surface hardness (H) and wear depth (D) in the same manner as in Example 1 above. As a result, the hardness of the surface of the precious wood conditioning compacted material X3 was H=25 N/mm ² or more, indicating good physical properties. In addition, the abrasion depth of precious wood conditioning and compaction material X3 was D = 0.12 mm or less, exhibiting good physical properties.

From the above, according to the present invention, by processing general-purpose wood that is relatively abundant in resources and available, it has a surface quality comparable to wood called precious wood, and in the case of ebony, rosewood, etc. In addition to this, it is possible to provide a compacted material of precious wood having a high market value, which has a feeling of weight, excellent physical properties, and can be used for high-class furniture and fittings, and a method for producing the same.

W1, W2, W3...Single plate, X1, X2, X3...Precious wood conditioning and compaction material,
MC... consolidation device, 10... press platen, 10A... upper press platen, 10B... lower press platen,
IS...Internal space, 18...Positioning hole.

Claims (6)

Consolidated teak wood ,
The value of the color difference (ΔE ^* ab) with the walnut material in the color system (L ^* a ^* b ^* ) is 5 or less,
A consolidation material for precious wood, characterized by having an air-dried density value within a range of 0.8 to 1.5 (g/cm ³ ) after consolidation and fixation. Consolidated eucalyptus material ,
The value of the color difference (ΔE ^* ab) from the ebony material in the color system (L ^* a ^* b ^* ) is 5 or less,
A consolidation material for precious wood, characterized by having an air-dried density value within a range of 0.8 to 1.5 (g/cm ³ ) after consolidation and fixation. Consolidated mahogany wood ,
The value of the color difference (ΔE ^* ab) from the rosewood material in the color system (L ^* a ^* b ^* ) is 5 or less,
A consolidation material for precious wood, characterized by having an air-dried density value within a range of 0.8 to 1.5 (g/cm ³ ) after consolidation and fixation. In accordance with the "Brinell hardness test" specified in JIS Z 2101: 2009 (wood test method), the load when the depth of indentation into the surface of the test piece is 1/π (mm) is P (N) When the following formula (1),
H=P/10 (1)
4. The consolidation material according to any one of claims 1 to 3, characterized in that the value of surface hardness H represented by is 25 (N/mm ² ) or more. In accordance with JIS Z 2101: 2009 (wood test method) "wear test", the mass of the test piece before measurement is m1 (mg), the mass of the test piece after the test is m2 (mg), the test machine The following formula (2), where A (mm ² ) is the area of the portion subjected to abrasion by the wear wheel of the A (mm 2 ) and ρ (g/cm ³ ) is the density of the test piece,
D=(m1−m2)/A・ρ (2)
The value of the wear depth D represented by is 0.12 (mm) or less. A method for producing the precious wood conditioning and compaction material according to any one of claims 1 to 5,
The teak, eucalyptus, or mahogany wood is pressed in a high pressure steam-containing atmosphere within a temperature range of 150° C. to 210° C. and 5 to 70 kg/cm ² using a sealable mold having hot plates facing each other. A method for producing a precious wood-prepared compacted material, characterized in that the teak, eucalyptus, or mahogany is compacted and fixed by heat treatment and compression treatment for 10 to 120 minutes within a pressure range of .

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