JPH0773841B2 - Veneer dyeing method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a veneer dyeing method used for producing a laminated decorative veneer.

[Background technology]

2. Description of the Related Art Conventionally, a decorative plywood having a laminated decorative veneer attached on the surface thereof such as a ceiling material or a wall material has been used. As shown in FIG. 2, the laminated decorative veneer is manufactured by applying a contacting agent with a roll coater 21 on one side of a material veneer 20 dyed in a predetermined color, and then applying a plurality of them to a pair of concavo-convex patterns. The laminated flitch 24 is formed by laminating it in the molds 22 and 23 and pressing and adhering it, and slicing this with a slicing blade 25 from a direction intersecting the laminating plane to obtain a decorative veneer 26. On the plate surface of the decorative veneer 26, a wood grain pattern similar to a natural tree species (cypress, etc.) is created to give a natural feeling and a natural feeling.

The material veneer is a thin veneer having a thickness of 1 mm or less, which is obtained by rotary slicing raw wood.
This veneer is decolorized, then dyed in the color of the desired tree species, dried, and then assembled and sliced in the above-mentioned process.

For dyeing a single plate, so-called steaming dyeing is generally performed, in which a dyeing solution is applied to the single plate and steaming is performed. At this time, as shown in FIG. 3, in order to improve the passage of water vapor into the single plates 10 loaded with a large number of sheets, a corrugated plate-like spacer 11 is provided for every predetermined number (for example, 30 sheets) of steam. I put it in a pot and did steaming.

However, there is a problem that unevenness of temperature or unevenness of color due to dew condensation of steam always occurs in a few of the stacked single plates 10 that are in contact with the spacer 11.

[Object of the Invention]

An object of the present invention is to provide a veneer dyeing method that does not cause the above-mentioned color unevenness.

[Disclosure of Invention]

The method for dyeing a veneer according to the present invention comprises stacking veneers coated with a dyeing solution through a spacer so that a predetermined number of vapours are formed as a space through which water vapor flows, and at the same time, the veneer on the outer layer portion in contact with the spacer. It is characterized in that a dummy veneer of the same quality is placed and steaming staining is performed.

That is, in the present invention, in view of the fact that it is the single plate of the outer layer portion in contact with the spacer that causes color unevenness due to temperature unevenness or dew condensation of steam, a dummy single plate is formed in the outer layer portion of the stacked single plates in contact with the spacer. By arranging them, it is possible to avoid the occurrence of color unevenness on the single plate. Further, since the dummy veneer is of the same quality as the veneer, steam can pass through it easily during the steaming dyeing, and a predetermined number of veneers can be dyed uniformly and efficiently.

FIG. 1 is an explanatory view showing a dyeing method according to the present invention. As shown in FIG. 1, spacers 2 are formed so that a water vapor distribution space is formed every predetermined number of veneers 1 coated with a dyeing solution. A dummy veneer 3 is arranged on the outer layer portion A which is in contact with the spacer 2 for stacking and steaming dyeing.

It is appropriate that the number of stacked dummy single plates 3 is about 3 to 5 when the number of stacked dummy single plates 3 is about the same as that of the single plate 1. When the number of stacked dummy single plates 3 is smaller than this, temperature unevenness and dew condensation due to the spacer 11 are caused. The influence reaches the veneer 1 through the dummy veneer 3, and when the number of stacked sheets is larger than this, the efficiency of the dyeing process becomes poor.

The dummy veneer 3 is of the same quality as the veneer 1.
If a different material such as a metal plate or a plastic plate is used as the dummy veneer 3, the water vapor may not pass through, and the desired veneer 1 may not be uniformly dyed. Further, the dummy veneer 3 may be one to which the dyeing solution has been applied in advance as in the case of the veneer 1 or the one not applied may be used as it is.

Next, the method for dyeing a veneer of the present invention will be described with reference to Examples and Comparative Examples.

Example: An outer layer contacting the spacer 2 as shown in FIG. 1 in the process of stacking and dyeing every 30 sheets of veneer coated with a dyeing solution having the following composition at a coating amount of 100 g / m ² with a spacer interposed therebetween. The wood-based dummy veneers 3 of the same quality as the veneer 1 were arranged on 3 to 5 sheets of the part A, and were placed in the steam pot in this state. Then, steaming was performed at a steaming temperature of 95 to 100 ° C. for 2 hours. As a result, no color unevenness was found in any of the single plates.

Comparative Example: Steaming dyeing was performed in the same manner as in Example except that the dummy veneer 3 was not used, and color unevenness was observed in 3 to 5 veneers in a region in contact with the spacer. .

〔The invention's effect〕

According to the present invention, by placing the dummy veneer in the outer layer portion of the loaded veneers that is in contact with the spacer that is likely to cause color irregularity due to temperature unevenness or condensation of steam, it is possible to prevent color unevenness from occurring in the veneer. The effect is that you can. Further, since the dummy veneer is of the same quality as the veneer, steam can pass through it easily during the steaming dyeing, and a predetermined number of veneers can be dyed uniformly and efficiently.

[Brief description of drawings]

FIG. 1 is an explanatory view of an embodiment of the present invention, FIG. 2 is an explanatory view showing a method for manufacturing a general laminated veneer, and FIG. 3 is an explanatory view showing a conventional veneer dyeing method. 1 ... Single plate, 2 ... Spacer, 3 ... Dummy single plate

Claims (1)

[Claims] 1. A single veneer coated with a dyeing solution is loaded via a spacer so that a predetermined number of sheets of vapour are formed so that a water vapor circulation space is formed, and a dummy veneer of the same quality as the veneer is placed on an outer layer portion in contact with the spacer. A method for dyeing a single plate, which comprises arranging plates and performing steaming dyeing.