JPS6048304A - Manufacture of dyed veneer and manufacture of artificial decorative veneer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to a method for manufacturing dyed veneer used for manufacturing artificial decorative veneers used as decorative materials for interior building materials, and an artificial decorative veneer using this dyed veneer. Concerning the manufacturing method.

[Background technology]

Artificial decorative veneer is used as a veneer for decorative boards.

This artificial decorative veneer is usually made as follows. That is, the veneers obtained by rotary slicing are degreased and bleached, then dyed, the obtained dyed veneers are laminated with an adhesive, pressure molded to obtain an assembled flitch, and this is sliced. It is obtained by The dyed veneers used in such processes were usually dyed almost uniformly. For this reason, decorative veneers obtained by laminating and pressing such dyed veneers and slicing them tend to have uniform color and a monotonous color expression. For this reason, there was a drawback that wood grain expression and transition part expression were poor.

[Purpose of the Invention] This invention was made in view of the above circumstances, and it is an object of the present invention to diversify the expression of wood grain and transition areas by appropriately controlling the transfer of dye in the thickness direction and surface direction of the veneer. With the goal.

(Disclosure of invention) The inventors have made extensive studies to achieve the above object.

As a result, this invention was completed.When dyeing a wood veneer, the dye is applied to the wood veneer under heat to control the transfer of the dye. The first manufacturing method for dyed veneer, which is characterized by
In order to obtain artificially decorated veneers by laminating dyed veneers and slicing the resulting flitch, the dye migration is prevented by applying voltage under heating after dye application. The second gist is a method for manufacturing artificial decorative veneers, which is characterized by the use of controlled materials. This will be explained in detail below.

The first invention is to degrease and decolorize a laminated sliced wood veneer obtained by slicing a wood veneer obtained by rotary lace or a 1η flitch obtained by laminating this veneer in accordance with a normal process. However, when dyeing the wood veneer, the transfer of the dye is controlled by applying a voltage under heat to the wood veneer coated with the dye.

As the dye used in this invention, for example, an acidic dye having a sulfonic acid group is preferably used.

Such dyes are ionically dissociated in solution, such as D-3o3e+Nae. When voltage is applied to a state where the dye is ionically dissociated in this way, electrophoresis of the dye ions occurs, and this can be used to appropriately control the migration of the dye in the plane direction or thickness direction of the veneer. It is.

Figure 1 is a perspective view of the dye-coated wood veneer used in this invention, Figure 2 is a perspective view of the dye-coated wood veneer with voltage applied in the thickness direction, and Figure 3 is the veneer. FIG. The dye-coated wood veneer 1 shown in FIG. 1 is made by applying an acidic dye at a desired concentration with a brush or the like to a degreased and bleached wood veneer or a laminated sliced wood veneer. Next, a plurality of dye-coated wood veneers 1 are stacked, and the dye-coated wood veneers 1 are stacked as shown in FIG.
Sandwich between a and 2b. Then, a voltage is applied while being heated by steam heating (exposure to a water vapor atmosphere) and/or oven heating, that is, while or after heating. At this time, the dye applied to the veneer dissociates and becomes anionic, so when it moves due to heating, the dye 3
moves toward the anode plate 2b, and the migration is further promoted. This effect only adds up in one direction, so
By controlling the voltage level, length of time, etc., it is possible to dye evenly or darken only the negative side to clearly express the wood grain and transition areas when using artificially decorated veneer. We will make it possible for you to do so.

FIG. 4 shows another embodiment of the present invention, and is a perspective view showing a state in which a voltage is applied in the surface direction of a dye-coated wooden veneer. As seen in this figure, the difference from the case in FIG. 2 is that a plurality of dye-coated wooden veneers 1 are stacked and sandwiched between electrode plates 4a and 4b from both sides. That is, in the case of FIG. 4, since the voltage is applied in the plane direction (fiber direction), the concentration gradient of the dye in the plane direction can be controlled. When the density is changed in the plane direction, it is possible to diversify the wood grain and the pattern of the transition area when used as an artificially decorated veneer.

The second invention uses the dyed veneer obtained in the first invention, laminates and laminates them with an adhesive as described in Doriichi, and slices the resulting laminated flitch to obtain artificial decorative veneers. .

FIG. 5 is a perspective view of a dyed veneer, FIG. 6 is a perspective view of an assembled flitch, and FIG. 7 is a perspective view of an artificially decorated veneer.

In the second invention, a plurality of dyed veneers 5 shown in FIG. 5 obtained in the first invention are laminated with an adhesive, and this is pressed using a curvature mold, and the result is shown in FIG. An assembled flitch 6 is formed as shown in FIG. This assembled flitch 6 is sliced at a desired angle so that the grains are exposed to obtain an artificial decorative veneer 7 as shown in FIG.

In the artificially decorated veneer 7, the wood grains 8a, 8b, 3c and the transition areas 9a, 9b, 9c are gradually changed from dark to light in color. Furthermore, the transition portions 8a, 8b, and 8c also have shading gradients. For this reason, the expression of wood grain and transition areas is diversified.

The manufacturing method of the artificial decorative veneer in Figures 5 to 7 is described as an example in which a density gradient is imparted in the surface direction, but the method is not limited to this (level-dyed or A material whose -a lightness is controlled in the thickness direction can also be freely used.

〔Effect of the invention〕

In the first manufacturing method according to the present invention, when dyeing a wooden veneer, the transfer of the dye is freely controlled by applying voltage under heating to the wooden veneer coated with the dye. The dyed veneer can be dyed evenly, or the concentration gradient can be freely changed in the thickness direction or surface direction.

In addition, in the second manufacturing method according to the present invention, the dyed veneers obtained in the first manufacturing method are laminated and laminated, and the resulting laminated flitch is sliced to make an artificial decorative veneer. The wood grain and transition areas of the veneer vary in expression due to changes in the density gradient.

〔reference〕

Conventionally, when creating dyed veneers to be used as materials for artificially decorated veneers, steam dyeing (dye coating and exposure to a condensed water vapor atmosphere) is performed. However, with steam dyeing, it is easy to dye uniformly, and even if there is color variation, it is only caused by changes in the physical properties of the veneer over time, so the dyed veneer obtained does not have much variation and does not have a natural look. It was missing.

To solve this problem, you can do the following. That is, when producing dyed veneers to be used as materials for artificially decorated veneers, the dye-coated wood veneers 11 are steam-dyed inside the autoclave 10, as shown in FIG. It is. At this time, while blowing out steam from the steam jet hole 12 of the autoclave 10 in the direction of the arrow, the pressure regulating valve 13 is operated and the autoclave 10 is
change the temperature inside over time. As a result, the resulting dyed veneer exhibits color variations due to uneven dye impregnation due to temperature changes within the autoclave, giving it an excellent natural appearance.

(Reference Example) Steam dyeing was performed for 2 hours in an autoclave on a 1 mm thick tapered veneer coated with a dye. During steam dyeing, operate the pressure regulating valve of the autoclave to maintain an internal pressure of 1 to 2 atm and an internal temperature of 100 to 120°C.
Changes over time in the range of .

By employing such a treatment, temperature changes occur within the autoclave, which causes variations in the impregnated state of the dye. For this reason, the resulting dyed veneer exhibits color variation and can express a natural look.

[Brief explanation of drawings]

Figure 1 is a perspective view of a dye coated wood veneer, Figure 2 is a perspective view of the dye coated wood veneer with voltage applied in the thickness direction, and Figure 3 is a state of dye migration within the veneer. Figure 4 is a perspective view of a dye-coated wood veneer with voltage applied in the plane direction, Figure 5 is a perspective view of a dyed veneer, and Figure 6 is an assembled flitch. FIG. 7 is a perspective view of an artificially decorated veneer, and FIG. 8 is a perspective view of the veneer in a steam-dyed state. 1... Dye coated wood single Fj, 2a, 2b, 4a, 4b
...Electrode plate 3...Dye 5...Dyed veneer 6.
... Laminated flitch 7 ... Artificial decorative veneer 8a, 8b
, 8c...Wood grain 9a, 9b, 9c...Transition part l
O... Autoclave 13... Pressure regulating valve agent Patent attorney Takehiko Matsumoto Figure 1 Figure 2 Figure 3

Claims (9)

[Claims] (1) A method for producing a dyed veneer, which is characterized in that when dyeing a wood veneer, the transfer of the dye is controlled by applying voltage under heating to the wood veneer coated with the dye. (2) The method for producing a dyed veneer according to claim 1, wherein the dye is an acid dye. (3) The method for producing a dyed veneer according to claim 1 or 2, wherein the heating is performed by steam heating and/or open heating. (4) The method for producing a dyed veneer according to any one of claims 1 to 3, wherein the direction in which the voltage is applied is the surface direction of the wooden veneer. (5) The method for producing a dyed veneer according to any one of claims 1 to 4, wherein the direction in which the voltage is applied is the thickness direction of the wood veneer. (6) When laminating dyed veneers and slicing the resulting flitch to obtain artificially decorated veneers, the migration of the dye is controlled by applying voltage under heating after applying the dye as a dyed veneer. A method for manufacturing artificially decorated veneer, characterized by using a (7) The method for producing an artificially decorated veneer according to claim 6, wherein the dye is an acid dye. (8) The method for producing an artificially decorated veneer according to claim 6 or 7, wherein the heating is performed by steam heating and/or oven heating. (9) The method for producing an artificial decorative veneer according to any one of claims 6 to 8, wherein the direction in which the voltage is applied is the surface direction of the wooden veneer. 00) The method for producing an artificial decorative veneer according to any one of claims 6 to 9, wherein the direction in which the voltage is applied is the thickness direction of the wood veneer.