JPS59182703A - Impregnation treatment method - 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〕 The present invention relates to a method for impregnating sheet materials.

[Background technology]

Natural precious wood is preferred because of its unique decorative patterns that give it a natural feel, but its use is limited to special locations due to resource shortages and high prices. For this reason, carpentry precious wood is manufactured in an attempt to artificially create something similar to natural precious wood. Carpenter's precious wood is usually manufactured as follows.

That is, the wood veneer that is the material is usually difficult to dye and use as it is because of tar stains and background color.

Therefore, pretreatment to remove dirt and decolorization are performed. After that, it is dyed in the desired color and is manufactured into carpenter's precious wood through processes such as pressing and slicing. In these processes,
In an alkali treatment performed as a pretreatment for decolorization, a dyeing treatment performed after decolorization, etc., a roll coater is used to impregnate the material with a treatment liquid. However, when a wooden veneer is impregnated with an alkaline treatment liquid or a dye liquid using a coal coater, the water absorption rate tends to vary depending on the material of the wooden veneer. As a result, the amount of deposited processing chemicals differs. For this reason, in the case of alkaline treatment, variations may occur in subsequent decolorization and dyeing, and in the case of dyeing treatment, uneven dyeing may occur. In addition, when using a flow coater to impregnate these treatment liquids, a relatively uniform amount can be applied, but on the other hand, penetration is slow, so it takes time for almost all of the applied liquid to penetrate inside the veneer. There was a problem of leakage during the loading process.

[Purpose of the invention]

The present invention was made in view of these circumstances, and provides a method that can uniformly impregnate a treatment agent even in sheet-like materials that have different water absorption rates depending on the material.

[Disclosure of the invention]

In order to achieve such an objective, the inventor conducted extensive research and found that the sheet-like material was impregnated with water in advance, and then the drug powder was sprinkled on the surface of the sheet-like material, and this was layered to form the drug. The present invention was completed based on the confirmation that the above-mentioned drawbacks can be overcome by performing curing to promote the penetration of .

Therefore, the present invention is characterized in that after a sheet material is impregnated with water, a drug powder is sprinkled on the surface, and the materials on which the drug powder has been sprayed are stacked to perform curing for the penetration of the drug. Its gist is the impregnation treatment method.

This will be explained in detail below.

The term "sheet-like material" as used in this invention refers to a broad concept of sheet-like objects, including wood veneers for manufacturing precious wood for carpenters, as well as fabrics such as paper, pulp, and cloth. For example, NaOH, KOH, LiOH+ Na2
Refers to powders of chemicals selected according to the content of impregnation treatment, such as alkali powders such as CO3 and water-soluble dye powders.

FIGS. 1(a) to 1(a) are explanatory diagrams illustrating an embodiment of the impregnation treatment method according to the present invention. The wood veneer 1 shown in FIG. 1(a) formed by cutting the flitch is shown in FIG.
It is sent to f1) water impregnation step. Here, wood veneer 1
Sponge roll coater 2 while moving in the direction of arrow A.
The wooden veneer 1 is impregnated with water 3 by the following steps. This water impregnation is important because it allows these chemical powders to uniformly adhere and penetrate during subsequent treatments such as alkali treatment and dyeing. In other words, the wood veneer 1 acts to promote the penetration of chemicals in the subsequent process by impregnating them with water, making it extremely easy for them to penetrate inside. Even if there is some variation in the moisture content of the wood veneer 1, it is not particularly important. In short,
It is sufficient that it contains the moisture necessary to perform such a promoting effect.

Next, the water-impregnated wood veneer 1 is sent to the chemical powder spraying step shown in FIG. 1(C). Here, wood veneer 1 is
For example, while moving in the direction of arrow B using an endless belt (not shown), the chemical powder 5 is spread onto the surface of the wooden veneer 1 by a feeder 4 provided above. As the feeder 4 used for dispersing the drug powder 5, the one shown in FIG. 2 or 3 is used, for example, in order to enable minute dispersion. That is, the feeder 4a shown in FIG.
The upper part is provided with a hopper 6a into which the drug powder 5 is placed, and the lower part is funnel-shaped. The lower end of the funnel-shaped bottom is connected via a delivery pipe 7 to a drug dispersion port 8 provided at the tip of the pipe 7. The delivery pipe 7 is equipped with a delivery screw 9 for adjusting the delivery amount of the drug powder 5 and an air delivery port 10. The drug powder 5 in the hopper 6a is sent out by a feed screw 9 directly connected to the rotation of the morph 11, and the drug powder 5 is fed to the drug dispersion port 8 by the air flow entering from the air inlet 10 below.
It is sprayed on the surface of the wood veneer 1. On the other hand, the hopper 4b shown in FIG. 3 is similarly provided with a hopper 6b in the upper part into which the drug powder 5 is placed, and the lower part is funnel-shaped. The lower end of the funnel-shaped bottom is connected via a pipe 12 to an electromagnetic vibration slitter I3 provided at its lower end. The slitter 13 has an elongated slit on its lower surface, and is designed to be shaken by an operating bar of an electric coil 14. The chemical powder 5 in the hopper 6b is scattered onto the surface of the wood veneer 1 from the tip of the slitter. In this invention, the powder scattering device is not limited to those having the structure of these feeders. The amount of chemical powder to be sprayed is not particularly limited, and it is desirable to spray the amount necessary for carrying out treatments such as decolorization or dyeing as uniformly as possible over the surface of the veneer.

Next, the wooden veneer 1 on which the chemical powder has been sprinkled is prepared as shown in Fig. 1 (d
It is sent to the curing process of l. Here, in order to efficiently penetrate the sprayed chemical powder, the wooden veneers 1 are stacked one after another on the pedestal 15 and cured. When the wooden veneers sprayed with the chemical in this manner are stacked one after another, the chemical powder 5 on the surface of each wooden veneer 1 is brought into close contact with the back surface of the adjacent veneer. As a result, the chemical powder penetrates not only from the front side of the wood veneer but also from the back side. In addition, curing is performed in an atmosphere of water vapor, solvent vapor, etc. For example, in the case of water vapor, if the temperature is kept at 60 to 100°C, the wood veneer 1
It is possible to promote the penetration of the drug powder into the inside. Cover 16 is installed to prevent drying during curing and promote curing.
It is preferable to cover the stacked wooden veneers 1 using a material such as

After curing under the required conditions, remove the kat\-16 and
The material is allowed to stand in the state shown in Figure (e) until it is sent to the next step.After this, the material that has been pretreated with alkali powder is decolorized by applying a decolorizing agent such as hydrogen peroxide. Furthermore, after decolorizing and curing using water-soluble dye powder, it becomes dyed veneer by drying. Although the above explanation has been made regarding the example of wood veneer used for manufacturing artificial precious wood, the impregnation treatment method according to the present invention can also be applied to other materials such as paper, pulp, cloth, and other fabrics. Of course, the same can be done.

〔Effect of the invention〕

The impregnating treatment method according to the present invention involves impregnating a sheet material such as a wooden veneer with water for use in manufacturing precious wood for carpenters, etc.
By scattering chemical powder on the surface and curing it by stacking it to promote the penetration of the chemical, it is possible to uniformly impregnate a certain amount of the chemical even if the sheet material has different water absorption rates. can. Therefore, the product obtained by the impregnation treatment method according to the present invention has stable quality without uneven decoloring or uneven dyeing. In addition, compared to the conventional coating using a roll coater or the like using a chemical treatment liquid, no waste liquid is produced, which contributes to cost reduction.

Examples will be described below together with comparative examples [Example 1] A veneer made of Ius material Rokuri veneer (width 300 mm)
, length 2700 mm, thickness 1.5 mm) was prepared.

This veneer was impregnated with 250 to 300 g of water at 1 rrr using a sponge roll coater as shown in FIG. 1(b). Next, using a feeder as shown in Fig. 2), powder 1 of KOH
After spraying, the veneers were layered one after another and placed in a curing chamber like the one shown in Figure 1 (dl) at 40°C and 90%
It was left to cure at RH for 24 hours or more. The penetration of KOI into the veneer was promoted during curing, resulting in a strong increase in pallor.

Penetration of the drug was flawless. This veneer is sent to the next process and H2O. When applied, uniform decolorization was achieved.

[Comparative Example 1] The same Aius veneer as in Example 1 was used. A 6% 011 solution was applied to this veneer using a sponge roll coater.

The coated veneer weighs 4°8~12g in terms of KOH solid content.
/mF.

[Example 2] As a veneer, it was impregnated with water during the decolorization process (moisture content: 100
% or more) agathis veneer (width 600 mm, length 18
00 mm, thickness 0.7 mm) was prepared.

A water-soluble dye powder of 12 g/nf was uniformly sprinkled on this veneer using a feeder as shown in Fig. 3 (M).The veneers after being sprayed were laminated one after another.The 10 laminated veneers were The veneer was placed in a curing chamber such as DL and left to cure for 6 hours in 100% R11 saturated steam at 100°C.The veneer was dried to obtain a dyed veneer. Penetration was promoted, and color development was good with no variation.

[Brief explanation of the drawing]

Figures 1 (al to e) are explanatory diagrams showing one embodiment of the impregnation treatment method according to the present invention, and Figures 2 and 3 are partially cutaway side views of the feeder. ...Wood veneer 2...Sponge roll coater 3
...Water 4.4a, 4b...Feeder 5...Pharmaceutical powder agent Patent attorney Takehiko Matsumoto

Claims (1)

[Claims] (11. After impregnating a sheet-like material with water, chemical powder is sprinkled on the surface, and the materials on which the chemical powder has been sprinkled are piled up to perform curing for the penetration of the chemical. (2) The impregnation method according to claim 1, wherein the sheet-like material is a wood veneer for manufacturing artificial precious wood. (3) The impregnation method according to claim 1, wherein the chemical powder is an alkali powder. The impregnating method according to claim 1 or 2. (4) The impregnating method according to claim 1 or 2, wherein the drug powder is a water-soluble dye powder.