JPS5996909A - Method of dyeing 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 The present invention relates to a method for dyeing a wood veneer (hereinafter simply referred to as a "nest board"), in which the inside of the wood veneer is uniformly dyed, and then a part of the wood veneer is dyed lightly. Decorative linden t that takes care of natural color changes by using it as a full-time decorative veneer.
-The purpose is to obtain.

Conventionally, in order to give natural color changes to artificially distorted decorative linn boards, dyes of different colors were partially applied to the underarm-dyed surface of the board, which caused uneven impregnation of the dye solution. It was done in the same way.

However, with the conventional method of partially applying dyes of different colors to the once-dyed surface of the veneer, it is possible to dye the veneer darker in some areas than the entire veneer, but it is not possible to make it lighter. Moreover, the method of causing uneven impregnation of the dye solution has the problem that it is not always possible to finish with the same tone and color density.

Therefore, in the present invention, we have investigated these conventional problems, and after penetrating and diffusing the hair anion dye solution into the wood board using a pressure injection method under reduced pressure, we apply a cationic activator to the desired surface of the wood board. After applying a loosening agent containing and then sealing the veneer,
This is a method developed by Mitsutori to partially lighten dyeing of nest boards, which is characterized by heating and curing at high temperatures, and its most permissible feature is the use of anionic dyes with a slow dyeing agent containing a cationic activator. This allows me to dye some parts lightly.

The present invention will be explained in detail below.

First, after veneers of each thickness are sealed in a container, the pressure inside the container is reduced to remove moisture, air, and other substances harmful to dyeing from the veneers.

Here, it is preferable that the container is a container that can be depressurized, pressurized, and heated because the dyeing conditions can be mechanically controlled and the dyeing is excellent in reproducibility. In addition, the depressurization conditions are as follows:
It must be determined depending on the conditions such as the capacity of the container, the thickness and shape of the veneer, KfL4 fat, moisture content, etc., but usually the time is 5 to 60 at 1 m Hg - 100 man Hg in mercury column.
Good within minutes. In addition, the veneer should be treated with warm water containing a surfactant or decolorizing bleach to remove colored components, oil, and other substances that inhibit dyeing in the wood, and then dried. This is preferable because the reduced pressure conditions can be further relaxed and the dyeability is improved.

Next, an anionic dye solution is injected into the container under reduced pressure, the hand board in the container is immersed in this dye solution, and then the temperature is kept at a level (20 to 6
While maintaining the temperature at 0°C, compressed air is introduced to permeate and diffuse dye molecules into the veneer.

The anionic dyes used in the present invention include acid dyes, direct dyes, reactive dyes, and metal-containing dyes.

Next, the dyed veneers are taken out of the container and a slow dye solution containing a cationic activator is applied to the desired part of each board. Under corner temperature 2
The dyeing process is completed by heating and curing the food for ~24 hours. When heating and curing the veneer, be sure to completely seal it to prevent the dye solution that has penetrated into the veneer from evaporating and drying9, or by wrapping the entire veneer in polyethylene or polypropylene resin film. is also valid.

In the present invention, when a slow dyeing agent containing cationic activity is applied to a dyed veneer before heat curing, the slow dyeing agent reacts with the anionic dye, increasing the dyeing power of the coated area, and the slow dyeing agent is applied to the dyed veneer before heat curing. The idea is to take advantage of the principle of dyeing very lightly.

After the above steps, the veneer is heated and dried to about the equilibrium moisture content (12 to 15 inches), which further promotes the bonding of the dye molecules with the wood and provides the desired dyed veneer with good firmness.

Since the present invention uses the above-described dyeing method, not only can the same part of the veneer be uniformly dyed, but also the part to which the slow dyeing agent is applied is lightly dyed, resulting in a dyed veneer with a very natural color change. In addition, since no slow dyeing agent is mixed in the chestnut color liquid, plums can be used, making it economical and free from pollution problems.

Next, examples of Akane Akira will be described.

Example: After sealing 1,000 Acous wood veneers with a thickness of 0.7 mm in a container capable of reducing the pressure and controlling the cutting edge pressure, the pressure was first reduced to 5 wn Hg, and then 15olan Orange GGL (manufactured by Bayer) was sealed.

Gold-containing dye) 2? A container was filled with 1,000 t of dye solution at 40 to 50°C, which was a mixture of 10 t/l of Lavelin (No. 1 millet 84111, anionic activator), and the veneer was immersed in it, and the pressure was increased to 10 kg/crl. The dye solution was allowed to penetrate into the nest plate. Next, take out the veneer from the container and add 100 t/l of Be11m1ne KVi/ (Nippon Zouka Co., Ltd., cation activator) and CMC for each wood.
Apply a treatment solution mixed with 20 f/l to the visible area of the veneer at 20 f/l? The veneers, which had been coated at a temperature of 6 degrees, were allowed to rest again, the entire body was sealed with a polypropylene film, and the veneers were heated and cured at 80° C. for U hours. When the cured rate board was taken out, a dyed e* board was obtained in which only the areas to which the treatment solution had been applied were naturally lightened.

Claims (1)

[Claims] 1. Disperse the hair-nion-based liquid into the wood veneer using a pressure-reduced and pressurized injection method, and then apply a slow dye containing a cationic activator to the desired curve of the veneer; After that, the cell board is sealed and then heated and cured at a high temperature (+tW) to partially dye the cell board lightly.