JPS5843008B2 - How to dye wood - Google Patents

Description

[Detailed description of the invention] This invention relates to a method for dyeing wood.

Conventionally, dyed veneers are laminated with an adhesive, pressed using a mold to form an uneven flitch, and then this uneven flitch is sliced in any direction to obtain a decorative veneer. is being carried out.

However, since the veneer used as this material is usually dyed by dipping it in an aqueous dye solution, as long as the material is uniform, it will be dyed evenly and there will be no color unevenness. .

Therefore, in order to give uneven color to the veneer and increase the natural look of the sliced decorative veneer, the veneer is given an uneven thickness or is treated with chemicals and then dyed.

That is, in the former method, for example, when manufacturing a veneer of material using a rotary slicer, the movement of the chuck of the rotary race is changed on the left and right sides to produce a veneer 1 with different thicknesses on the left and right sides as shown in Figure 1, or evenly. The surface of a veneer of a certain thickness is partially ground with a brush, sander, etc. to form a veneer 3 having concave portions 2 as shown in Figure 2.The latter method involves applying penetrants, water repellents, etc. It is applied partially to the surface of the veneer.

However, the veneer used here is usually about 1 mm thick.
Since the veneer is extremely thin, in order to give the veneer an uneven thickness as described above, the veneer will be damaged unless the chuck of the rotary race is controlled and the depth of grinding is precisely adjusted using a sander. There are problems, and when chemical treatment is performed, the process becomes complicated.

Therefore, an object of the present invention is to provide a method for staining wood that can easily impart color unevenness to wood.

That is, this wood dyeing method is characterized by partially varying the immersion time of one piece of wood in a dye bath. For example, as shown in FIG. The entire plate 5 is immersed and heated, and after 3 hours, as shown in FIG.
After 0 minutes, pull up the veneer 5 a little further as shown in the same figure C, and repeat this after another 30 minutes as shown in the same figure.
After another hour, the entire piece is pulled up to complete the dyeing process.In the end, the dyeing unit was immersed in dye solution 4 in four stages: 3 hours, 3 hours and 30 minutes, 4 hours, and 5 hours. This is how you get the board.

As shown in Figure 4, the dyed veneer 6 thus obtained has four levels of density unevenness depending on the immersion time in the dyeing solution, and the thickness unevenness is adjusted to obtain the density unevenness. Desired density unevenness can be easily produced without any formation or chemical treatment.

Then, the dyed veneers are laminated with an adhesive layer interposed therebetween, pressed with a concave-convex plate to form a concave-convex flitch, and further sliced to form a decorative veneer 7 as shown in FIG. A wood part 8 and a light part 9 are also formed between the grains of the wood, giving it an appearance that closely resembles natural wood.

In addition, in this invention, the immersion time may be varied stepwise as described above or may be varied continuously.

As described above, the wood dyeing method of the present invention is characterized by partially varying the immersion time of one piece of wood in a dye bath, so that it has the effect of easily imparting uneven color to the wood. has.

Example l As shown in Fig. 6, a veneer 10 made of white lauan material with a width of 7 Q Omm, a length of 2500 mm, and a thickness of 1.0 mrIL was dyed with Mitsui Acid Fast Yellow GR (Mitsui Toatsu Chemical Co., Ltd.). (manufactured by)・・・・・・・・・・・・・・・・・・・
・・・・・・・・・0.3% Mitsuiad Fast Brown RX (manufactured by Mitsui Toatsu Chemical Co., Ltd.)・・・・・・・・・・・・・・・
・・・・・・0.7% Bath ratio: 40 Temperature: 95°C Stand it up in the staining solution 11 as shown in A in the same figure.
After soaking for an hour, pull it out and cut the upper part for 50 minutes as shown in Figure B.
After 30 minutes, the exposed length was increased to 1000 mm, and after another 30 minutes, the exposed length was increased to 2000 mm, and after 1 hour, the gold body (2500 mm) was exposed.
m) was pulled up from the staining solution 11.

The dyed veneer thus obtained has a light finish in the upper 500 mm, which was dyed in the staining solution for 3 hours, and a darker finish in the lower 500 mm, which was dyed in the dye solution for 5 hours. When this dyed veneer was used to make a laminated flitch and then sliced to make a decorative veneer, it showed a hue very similar to that of natural rosewood.

Example 2 As shown in Fig. 7, the width is 700 mm, the length is 1900 mm,
A veneer 12 made of agathis wood with a thickness of 0.8 mm is coated with the dye Nil Neal Yellow R (manufactured by Sumitomo Chemical Co., Ltd.).
・・・・・・・・・0.2% Anthracite Brown IBR
(Manufactured by Hoechst) 0.
7% Lanyl Brown R (manufactured by Sumitomo Chemical Co., Ltd.)...
......0.1% Bath ratio: 60 Temperature: 95°C Stand in the dyeing solution 13 and remove the lower part 40 as shown in Figure A.
After immersing the 0'mm dip for 30 minutes, increase the liquid volume to 900 degrees from the bottom as shown in Figure B, and 30 minutes later, soak it in Figure C.
The liquid volume was increased to 1400 mm as shown in the figure, and after another 30 minutes, the liquid volume was increased to above the top of the veneer 12 as shown in the same figure, and dyeing was carried out for another 4 hours and 30 minutes.The obtained dyed veneer was The dyeing was divided into dark and light colors in stages, with the lower rows being darker and the upper rows gradually becoming lighter.

When this was used as a material veneer for decorative veneer in the same manner as in Example 1, the obtained decorative veneer had a hue very similar to that of natural rosewood.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are respectively explanatory diagrams of a conventional method for imparting uneven dye density, FIG. 3 is an explanatory diagram of the process of this method, and FIG. 4 is a plan view showing an example of a veneer obtained by the present invention. FIG. 5 is a plan view showing an example of the use of the veneer, FIG. 6 is a process explanatory diagram of the first embodiment of the invention, and FIG. 7 is a process explanatory diagram of the second embodiment. 4.11.13...Staining solution, 5,10,12.
...Single board.

Claims (1)

[Scope of Claims] 1. A method for dyeing wood, characterized by partially varying the immersion time of one piece of wood in a dye bath. 2. The method for dyeing wood according to claim 1, wherein the wood is a veneer for forming a laminated flitch.