Method for manufacturing dyed wood, method for manufacturing laminate material, and dyed wood

Abstract

A method for manufacturing dyed wood according to the present invention comprises hydrophobizing a hydroxyl group in wood with a hydrophobic group, and dyeing the wood with a disperse dye in supercritical carbon dioxide.

Description

Method for manufacturing stained wood, method for manufacturing laminated wood, and stained wood

[0001] This disclosure relates to a method for manufacturing stained wood, a method for manufacturing laminated wood, and stained wood. This application claims priority based on Japanese Patent Application No. 2025-007708, filed on 20 January 2025, and incorporates all of its disclosures herein.

[0002] Dyeing is a technique used to color wood while preserving its natural beauty. Currently, large quantities of dye-containing solutions (dye solutions) are used to color wood.

[0003] Patent Document 1 describes a method for manufacturing dyed wood that retains its color even after polishing or processing, which involves placing the wood in a vacuum, immersing the wood in an impregnation solution containing a dye, and then changing the state of the wood from a vacuum to a pressurized state.

[0004] Patent Document 2 describes a method for dyeing wood to have multiple hues, which involves immersing the wood in a tank of dye solution containing multiple dyes with different penetration properties due to differences in affinity to wood, removing the wood from the dye solution tank and drying it, thereby dyeing the wood to a multi-hue consisting of the hue of the dye with weak affinity and the hue of a mixture of two or more dyes.

[0005] Patent Document 3 describes a method for manufacturing colored wood that can reliably remove excess dye components, comprising the steps of dyeing wood with a dye solution and washing the dyed wood with a cleaning solution, wherein in the washing step, the cleaning solution is forcibly introduced into the wood from one end grain side of the dyed wood, while the cleaning solution inside the wood is sucked out and discharged from the other end grain side.

[0006] Japanese Patent Publication No. 2022-41422, Japanese Patent Publication No. Hei 8-244006, Japanese Patent Publication No. 2008-942

[0007] As described in Patent Documents 1 to 3, dyeing wood using a large amount of dye solution generates a large amount of waste liquid after dyeing. Therefore, the technologies described in Patent Documents 1 to 3 have problems from a sustainability standpoint.

[0008] One aspect of this disclosure aims to provide a method for manufacturing stained wood that can improve sustainability.

[0009] (1) A method for producing dyed wood according to one aspect of the present disclosure includes hydrophobizing hydroxyl groups in wood with hydrophobic groups, and dyeing the wood with a disperse dye in supercritical carbon dioxide.

[0010] (2) In (1) above, it is preferable that the hydrophobic group is an acetyl group.

[0011] (3) In (1) or (2) above, the hydrophobization may be carried out in supercritical carbon dioxide.

[0012] (4) In any of (1) to (3) above, the staining may be performed after the hydrophobic treatment.

[0013] (5) In any of (1) to (3) above, the hydrophobization and the staining may be carried out in parallel.

[0014] (6) A method for manufacturing a laminated material according to another aspect of the present disclosure includes laminating a fabric to the first surface of any of the stained woods described in (1) to (5).

[0015] (7) The method for manufacturing the laminated material described in (6) above may include laminating a resin film onto the second surface of the stained wood.

[0016] (8) A dyed wood according to another aspect of the present disclosure is one in which at least some of the hydroxyl groups of the cellulosic fibers are hydrophobicized with hydrophobic groups and contains a disperse dye.

[0017] (9) Automotive interior components may include the stained wood described in (8) above.

[0018] In this disclosure, "supercritical carbon dioxide" means carbon dioxide under temperatures and pressures above its critical point. "Disperse dye" means a dye that is insoluble or sparingly soluble in water.

[0019] A method for manufacturing stained wood according to one aspect of this disclosure can improve sustainability.

[0020] Figure 1 is a flowchart showing a method for manufacturing dyed wood according to one embodiment of the present disclosure. Figure 2 is a graph showing the quality of dyed wood in the method for manufacturing dyed wood of Figure 1. Figure 3 is a graph showing the quality of dyed wood in the method for manufacturing dyed wood of Figure 1. Figure 4 is a schematic cross-sectional view showing dyed wood manufactured by the method for manufacturing dyed wood of Figure 1. Figure 5 is a flowchart showing a method for manufacturing laminated wood according to one embodiment of the present disclosure. Figure 6 is a schematic diagram showing an example of the procedure for laminating fabric to the first surface of dyed wood in the method for manufacturing laminated wood of Figure 5. Figure 7 is a schematic diagram showing an example of the procedure for laminating resin film to the second surface of dyed wood in the method for manufacturing laminated wood of Figure 5. Figure 8 is a schematic cross-sectional view showing laminated wood manufactured by the method for manufacturing laminated wood of Figure 5.

[0021] The embodiments of this disclosure will be described in detail below, with reference to the drawings as appropriate. It should be noted that, regarding the numerical values ​​described herein, only one of the upper or lower limits may be adopted, or the upper and lower limits may be combined in any way. All possible ranges of numerical values ​​that can be combined are described herein as preferred ranges. Furthermore, each figure is schematic and may not correspond to actual dimensions, proportions, etc. In this disclosure, the designations "First" and "Second" are for distinguishing the components to which they are attached and do not limit the number, order, priority, etc.

[0022] [First Embodiment] <Method for Manufacturing Dyed Wood> A method for manufacturing dyed wood according to one embodiment of the present disclosure, as shown in Figure 1, involves hydrophobizing the hydroxyl groups in the wood with hydrophobic groups (hydrophobization step S1), and dyeing the wood with a disperse dye in supercritical carbon dioxide (dyeing step S2).

[0023] The method for producing dyed wood involves hydrophobizing the hydroxyl groups in the wood with hydrophobic groups, which makes it easier for disperse dyes to penetrate the gaps between the fibers. In particular, by performing the dyeing step S2 in supercritical carbon dioxide, the method allows the disperse dyes to penetrate deeply and evenly into the gaps between the fibers without using solvents such as water or auxiliary agents such as surfactants. Supercritical carbon dioxide is a state in which carbon dioxide has exceeded the critical point where it is neither a gas nor a liquid. Because this supercritical carbon dioxide has the diffusivity of a gas and the solubility of a liquid, it can dissolve disperse dyes and allow them to penetrate deeply into the wood. Therefore, the method for producing dyed wood allows for easy and uniform coloring of the wood. Furthermore, supercritical carbon dioxide does not generate wastewater after dyeing with disperse dyes and can be reused repeatedly. Thus, the method for producing dyed wood can improve sustainability.

[0024] [Wood] The wood used in the manufacturing method of the stained wood can be selected according to the intended use of the stained wood. The stained wood may be used, for example, as an interior component of an automobile, as will be described later. In this case, examples of the wood include walnut, maple, ash, Japanese ash, birch, beech, sapele, poplar, eucalyptus, agathis, linden, basswood, cedar, bamboo, and cork. The stained wood may also be used, for example, as an instrument component, as will be described later. In this case, examples of the wood include rosewood, maple, ebony, spruce, and grenadilla.

[0025] (Hydrophobicization process) In the hydrophobicization process S1, the hydroxyl groups in the wood are hydrophobicized by hydrophobic groups, thereby modifying the wood to be hydrophobic. In the hydrophobicization process S1, improving the hydrophobicity of the wood facilitates dyeing using disperse dyes in the dyeing process S2.

[0026] Examples of the hydrophobic group include acetyl groups and hydrocarbon groups. Among these, acetyl groups are preferred as the hydrophobic group. When the hydrophobic group is an acetyl group, the wood is acetylated in the hydrophobication step S1. That is, in the hydrophobication step S1, hydrogen atoms contained in the hydroxyl groups in the wood are replaced with acetyl groups. By using acetyl groups as the hydrophobic group, swelling and shrinkage of the wood can be suppressed, and the dimensional stability of the wood can be improved. Furthermore, when the hydrophobic group is an acetyl group, the disperse dye can be easily and reliably penetrated into the gaps between the fibers in the wood by the dyeing step S2 described later.

[0027] In the hydrophobication step S1, it is possible to use, for example, a liquid-phase method in which the wood is immersed in a large amount of acetic anhydride to allow the acetylation reaction to proceed, or a gas-phase method in which the wood is placed in acetic anhydride that has been heated and vaporized to allow the acetylation reaction to proceed. However, in the hydrophobication step S1, it is preferable to carry out the hydrophobication in supercritical carbon dioxide. That is, in the hydrophobication step S1, it is preferable to perform the acetylation treatment in supercritical carbon dioxide.

[0028] The procedure for carrying out the hydrophobicization in supercritical carbon dioxide involves, for example, placing the wood into a reaction vessel preheated to approximately 90°C or higher and 150°C or lower, and then introducing supercritical carbon dioxide into the reaction vessel. Subsequently, acetic anhydride is introduced into the reaction vessel according to the desired degree of acetylation to allow the acetylation reaction to proceed. The concentration of acetic anhydride introduced into the reaction vessel may be, for example, 0.01 mol / L or higher and 1.0 mol / L or lower. After the acetylation reaction has proceeded sufficiently, the pressure inside the reaction vessel is reduced, and the wood is removed from the reaction vessel. The acetylation treatment time may be, for example, 1 hour or more and 10 hours or less.

[0029] In the hydrophobicization step S1, acetylation treatment is performed in supercritical carbon dioxide, which reduces the amount of acetic anhydride used while ensuring uniform acetylation throughout the wood. In other words, conventional liquid-phase methods require a large amount of acetic anhydride, posing challenges from a sustainability standpoint, but acetylation treatment in supercritical carbon dioxide improves sustainability. Furthermore, conventional gas-phase methods make it difficult to uniformly acetylate throughout the wood, but acetylation treatment in supercritical carbon dioxide allows for easy and reliable acetylation throughout the wood.

[0030] (Dyeing process) In dyeing process S2, a disperse dye is used. As a result, the method for producing dyed wood can produce a natural color without the unnatural coloring caused by the opacity of the pigment itself, which can occur when pigments are used. In dyeing process S2, it is not necessary to use solvents such as water or auxiliary agents such as surfactants.

[0031] In the dyeing step S2, the wood is dyed with a disperse dye in supercritical carbon dioxide, thereby preventing the discharge of wastewater while coloring the wood. In this method for manufacturing dyed wood, since the hydroxyl groups in the wood are hydrophobicized by hydrophobic groups in the hydrophobicization step S1, the disperse dye can penetrate into the gaps between the wood fibers in the dyeing step S2. In particular, in this method for manufacturing dyed wood, the wood can be uniformly colored by performing the dyeing step S2 in supercritical carbon dioxide. That is, for example, after acetylation treatment, bulky acetyl groups are introduced into the wood, so the cell walls of the wood swell and the dimensional stability is enhanced. In this situation, dissolving the disperse dye in supercritical carbon dioxide, combined with the high-pressure environment, allows the disperse dye to penetrate evenly from the surface of the wood to a certain depth. As a result, the wood can be easily and uniformly colored.

[0032] In the dyeing step S2, the wood is placed in a reaction vessel that has been preheated to, for example, 100°C or higher and 150°C or lower, and supercritical carbon dioxide is then introduced into the reaction vessel. Subsequently, a disperse dye is introduced into the reaction vessel to dye the wood, depending on the intended use of the dyed wood. The concentration of the disperse dye introduced into the reaction vessel may be 1 part by mass or more and 10 parts by mass or less per 100 parts by mass of the wood. After the wood has been sufficiently colored by the disperse dye, the reaction vessel is depressurized and the dyed wood (wood dyed in dyeing step S2) is removed from the reaction vessel. The dyeing treatment time in dyeing step S2 may be, for example, 1 hour or more and 10 hours or less.

[0033] Preferred types of disperse dyes include, for example, azo, quinophthalone, or anthraquinone. By using, for example, quinophthalone or anthraquinone disperse dyes, the lightfastness of the resulting dyed wood can be improved.

[0034] The method for manufacturing the stained wood may involve staining after hydrophobicization (staining step S2 may be performed after hydrophobicization step S1), or hydrophobicization and staining may be performed in parallel (hydrophobicization step S1 and staining step S2 may be performed in parallel).

[0035] Figure 2 shows an example in which a dyeing process S2 is performed after a hydrophobicization process S1. In this experiment, first, a 0.2 mm thick piece of wood (Claro walnut) was placed in a reaction vessel controlled to a temperature of 140°C and a pressure of 10 MPa to 12 MPa. Then, supercritical carbon dioxide and acetic anhydride were introduced into the reaction vessel and an acetylation treatment was carried out for 2 hours. After that, the acetylated wood was placed in a reaction vessel controlled to a temperature of 130°C and a pressure of 23 MPa to 25 MPa. Then, supercritical carbon dioxide and disperse dyes (anthraquinone-based (blue), azo-based (red, yellow)) were introduced into the reaction vessel and a dyeing treatment was carried out for 3 hours.

[0036] In Figure 2, Lab represents values ​​based on JIS-Z8722:2009, where L (lightness), a (hue), and b (chroma) are used. ΔE represents the color difference relative to the measurement point at a depth of 0 μm, where ΔE = [(ΔL)] ２ + (Δa) ２+ (Δb) ２ ] １／２ This is the value obtained by [method]. The procedure for measuring the Lab value and degree of acetylation in this experimental example is as follows: (a) Determine an arbitrary measurement point in the winter growth ring of the veneer after staining (stained veneer) and measure the thickness of the veneer. (b) Determine the degree of acetylation in the surface layer of the stained veneer. The degree of acetylation can be determined by the following procedure: Using a Fourier transform infrared spectrophotometer (nicolet 38 / Thermo Scientific), measure the absorption peak intensity (1738 cm) derived from the acetyl group of a sample with a known degree of acetylation. －１ ) is due to the expansion and contraction of the C-O bonds in cellulose and hemicellulose, and the absorption peak intensity (1030 cm) is derived from this. －１ (a) Divide by ) to obtain a value, create a calibration curve using the linear relationship between the degree of acetylation and the absorption peak intensity ratio, and use this calibration curve to determine the degree of acetylation. (c) Soak the stained veneer in water and measure the Lab value with a spectrophotometer when it becomes wet. (d) Dry the water and grind the area around the measurement point with 180-grit sandpaper. (e) Repeat steps (a) to (d) until the thickness of the stained veneer is about half of the initial thickness.

[0037] As shown in Figure 2, it can be seen that by performing the dyeing process S2 after the hydrophobicization process S1, uniform coloring can be achieved up to a depth of 80 μm in the thickness direction of the board. More specifically, as can be seen from Figure 2, the dyed wood obtained by this method of manufacturing dyed wood may have a color difference ΔE of 3.0 or less in the region at a depth of 80 μm relative to the surface layer at a depth of 0 μm, or it may be 2.8 or less.

[0038] As can be seen from Figure 2, the method for manufacturing dyed wood includes a hydrophobicization step S1 and a dyeing step S2, which allows for even coloring in a single dyeing treatment. Furthermore, by performing the dyeing step S2 after the hydrophobicization step S1, the method for manufacturing dyed wood can be easily and reliably produced.

[0039] An example of performing the hydrophobization step S1 and the dyeing step S2 in parallel is shown in FIG. 3. In this experimental example, first, wood ( claro walnut) with a thickness of 0.2 mm was placed in a reaction vessel controlled to a temperature of 140° C. and a pressure of 23 MPa or more and 25 MPa or less. Further, supercritical carbon dioxide, acetic anhydride, and disperse dyes (anthraquinone-based (blue), azo-based (red, yellow)) were introduced into this reaction vessel, and the acetylation treatment and the dyeing treatment were performed in parallel for 2 hours. In FIG. 3, Lab represents values based on JIS-Z8722:2009 and means L (lightness), a (hue), and b (chroma). Also, ΔE represents the color difference with respect to the measurement point at a depth of 0 μm, and is a value obtained by ２ +(Δa) ２ +(Δb) ２ 〕 １／２ . The measurement procedure for the Lab values and the degree of acetylation in this experimental example is the same as in the case of FIG. 2.

[0040] As shown in FIG. {3}, it can be seen that by performing the hydrophobization step S1 and the dyeing step S2 in parallel, homogeneous coloring can be achieved up to a depth region of 100 μm in the plate thickness direction. More specifically, as can be seen from FIG. 3, the dyed wood obtained by the method for producing the dyed wood may have a color difference ΔE of 3.0 or less, or 2.8 or less, in the region at a depth of 80 μm with respect to the surface layer at a depth of 0 μm.

[0041] As can be seen from FIG. 3, the method for producing the dyed wood includes the hydrophobization step S1 and the dyeing step S2, so that uniform coloring can be achieved in a single dyeing treatment. Also, the method for producing the dyed wood can produce the dyed wood more efficiently by performing the hydrophobization step S1 and the dyeing step S2 in parallel.

[0042] After the dyeing step S2, the concave portions of the conduits may remain on the surface of the wood. That is, in the dyeing step S2, the wood may be dyed with an open pore finish. According to the method for manufacturing the dyed wood, for example, by performing both the hydrophobization step S1 and the dyeing step S2 in supercritical carbon dioxide, the wood can be easily and homogeneously colored while leaving the concave portions of the conduits on the surface of the wood. As a result, natural coloring that makes use of the inherent beauty of the wood can be achieved regardless of whether it is summer or winter.

[0043] <Dyed Wood> The dyed wood 1 in FIG. 4 is manufactured by the method for manufacturing the dyed wood. The dyed wood 1 is itself an aspect of the present disclosure. In the dyed wood 1, at least a part of the hydroxyl groups of the cellulosic fibers are hydrophobized by hydrophobic groups, and it contains a disperse dye.

[0044] The dyed wood 1 is homogeneously colored because it is manufactured by the above-described method for manufacturing the dyed wood. Further, the dyed wood 1 contributes to an improvement in sustainability.

[0045] The dyed wood 1 is obtained by the dyeing in the above-described dyeing step S2. Therefore, the quality of the dyed wood 1 may be the same as the quality after the dyeing step S2 illustrated in FIGS. 2 and 3. The dyed wood 1 is, for example, in a plate shape. The dyed wood 1 has a first surface 1a and a second surface 1b facing each other. The dyed wood 1 may be colored over the entire outer surface, or only a part of the outer surface may be colored. When only a part of the outer surface of the dyed wood 1 is colored, the second surface 1b may be the colored surface.

[0046] The dyed wood 1 may be an interior member for an automobile. Since the dyed wood 1 is excellent in dimensional stability and has natural coloring that makes use of the inherent beauty of the wood, it is suitable as an interior member for an automobile.

[0047] Furthermore, the stained wood 1 may also be a musical instrument component. By subjecting the stained wood 1 to acetylation treatment in the hydrophobicization step S1 described above, for example, the dimensional stability and durability can be improved while maintaining the excellent mechanical properties of the wood. Therefore, the stained wood 1 can be suitably used as a musical instrument component with excellent acoustic properties and aesthetics. The musical instrument component is not particularly limited, but examples include keys in keyboard instruments, fingerboards in stringed instruments such as guitars and violins, soundboards in soundboards such as marimbas, and soundboards in percussion instruments.

[0048] If the stained wood 1 is a board, the lower limit of the average board thickness of the stained wood 1 may be 0.1 mm or 0.2 mm, from the viewpoint of ensuring sufficient coloring and meeting the required strength. On the other hand, the upper limit of the average board thickness may be 1.0 mm or 0.5 mm, from the viewpoint of improving the handling of the wood and utilizing the wood efficiently at low cost. Note that "average board thickness" means the average value of the board thickness at any five points.

[0049] <Method for Manufacturing Laminated Material> The dyed wood 1 can also be used as a laminated material when laminated with other components. As shown in Figure 5, the method for manufacturing the laminated material involves hydrophobizing the hydroxyl groups in the wood with hydrophobic groups (hydrophobization step S1), dyeing the wood with a disperse dye in supercritical carbon dioxide (dyeing step S2), and bonding other components to the dyed wood obtained in the dyeing step S2 (bonding step S3). The hydrophobization step S1 and the dyeing step S2 in the method for manufacturing the laminated material can be carried out in the same way as the hydrophobization step S1 and dyeing step S2 in Figure 1, so their explanation is omitted.

[0050] (Bonding process S3) In bonding process S3, the fabric is bonded to the first surface 1a of the dyed wood 1 (first bonding process). According to this embodiment, the dyed wood 1 is reinforced from the first surface 1a side, and the flexibility of the resulting laminated material is increased, improving handling. In addition, since the fabric itself does not easily emit greenhouse gases during manufacturing, it can contribute to improved sustainability.

[0051] Referring to Figure 6, an example of the bonding procedure in the first bonding step will be described. As shown in Figure 6, in the first bonding step, the fabric 2 wound on the first roll 120 is fed to the second roll 130, and the fabric 2 is bonded to the first surface 1a of the dyed wood 1 in the transport path from the first roll 120 to the second roll 130. The dyed wood 1 and the fabric 2 may be bonded together using, for example, an adhesive. In the first bonding step, the two-layer body, to which the dyed wood 1 and the fabric 2 have been bonded, may be wound directly onto the second roll 130. Because the two-layer body is highly flexible, it can be easily wound onto the second roll 130.

[0052] In the first bonding step, the lower surface of the fabric 2 (the surface opposite to the surface bonded to the dyed wood 1) may be supported by the support base 110, while the dyed wood 1 is pressed onto the upper surface of the fabric 2 using the pressure member 100.

[0053] Furthermore, in the bonding process S3, a resin film is bonded to the second surface 1b of the stained wood 1 (second bonding process). According to this embodiment, it is possible to form laminated material that emphasizes the original beauty of the wood.

[0054] Referring to Figure 7, an example of the lamination procedure in the second lamination step will be described. As shown in Figure 7, in the second lamination step, while the two-layer body 10 of dyed wood 1 and fabric 2 wound on the second roll 130 is fed to the third roll 140, the resin film 3 is laminated to the second surface 1b of the dyed wood 1 in the transport path from the second roll 130 to the third roll 140. The dyed wood 1 and the resin film 3 may be laminated using an adhesive. In the second lamination step, the three-layer body in which the resin film 3 is laminated to the two-layer body 10 of dyed wood 1 and fabric 2 may be wound directly onto the third roll 140. Because the three-layer body is highly flexible, it can be easily wound onto the third roll 140.

[0055] In the second bonding step, the resin film 3 may be pressed onto the second surface 1b of the dyed wood 1 while the lower surface of the fabric 2 is supported by the support base 150.

[0056] <Laminated Material> In the laminated material 20 shown in Figure 8, the fabric 2 is directly laminated to the first surface 1a of the dyed wood 1, and the resin film 3 is directly laminated to the second surface 1b of the dyed wood 1. The laminated material 20 is a three-layer body consisting of dyed wood 1, fabric 2, and resin film 3. The laminated material 20 is formed by the bonding process S3 described above.

[0057] The laminated material 20 is manufactured by the aforementioned method for manufacturing laminated materials, resulting in uniform coloring of the dyed wood 1. Furthermore, the laminated material 20 contributes to improved sustainability. In the laminated material 20, vascular recesses may remain on the surface of the dyed wood 1 (for example, the second surface 1b). Also, in the laminated material 20, the resin film 3 may conform to the surface shape of the dyed wood 1 (i.e., irregularities caused by the second surface 1b of the dyed wood 1 may be formed on the surface of the resin film 3).

[0058] The laminated material 20 may be, for example, an interior component for an automobile, or a component for a musical instrument.

[0059] [Other Embodiments] The embodiments described above do not limit the configuration of the present invention. Therefore, the embodiments may omit, substitute, or add components of each part of the embodiments based on the description herein and common technical knowledge, and all such additions should be interpreted as falling within the scope of the present invention.

[0060] In the above embodiment, a method was described in which a fabric is laminated to the first surface of the dyed wood and a resin film is laminated to the second surface of the dyed wood. However, the dyed wood may be used alone, for example, or other materials may be laminated to only one of the first or second surfaces. Furthermore, even when the dyed wood is laminated to other materials, it may be laminated to materials other than fabric and resin film.

[0061] It is also possible to further laminate other layers onto the laminated material. For example, a hard coat layer may be laminated onto the surface of the resin film.

[0062] 1. Stained wood 1a. First surface 1b. Second surface 2. Fabric 3. Resin film 10. Two-layer body 20. Laminated material 100. Pressurizing member 110. Support base 120. First roll 130. Second roll 140. Third roll 150. Support base

Claims

1. A method for producing dyed wood, comprising hydrophobizing hydroxyl groups in wood with hydrophobic groups, and dyeing the wood with a disperse dye in supercritical carbon dioxide.

2. The method for producing stained wood according to claim 1, wherein the hydrophobic group is an acetyl group.

3. The method for producing dyed wood according to claim 1, wherein the hydrophobic treatment is carried out in supercritical carbon dioxide.

4. The method for producing dyed wood according to claim 1, wherein the dyeing is performed after the hydrophobic treatment.

5. The method for producing dyed wood according to claim 1, wherein the hydrophobic treatment and the dyeing are carried out in parallel.

6. A method for manufacturing laminated wood, comprising laminating a fabric to the first surface of a stained wood according to any one of claims 1 to 5.

7. The method for manufacturing a laminated material according to claim 6, further comprising laminating a resin film onto the second surface of the stained wood.

8. Dyed wood in which at least some of the hydroxyl groups of cellulose fibers are hydrophobicized with hydrophobic groups, and which contains a disperse dye.

9. An automotive interior component comprising stained wood as described in claim 8.

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