JPS60225710A - Impregnating treating method of wood - 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 wood.

[Background technology]

To bleach or stain wood uniformly and in a short time,
It is important to quickly penetrate and diffuse bleaching and staining agents into the wood. However, penetration and diffusion of moisture is more difficult in the horizontal direction of wood than in the vertical direction. This is because the membrane pores, which are the entrance and exit points for moisture between wood cells, are sometimes closed.

FIG. 1 shows the membrane pores 1 of a coniferous tracheid.

In Fig. 1, reference numeral 2 indicates an intercellular layer (margo) that partitions cells from each other. (consisting of two). The membrane pores 1 are closed by tournes 5.

By the way, as a pretreatment for bleaching and dyeing, a method of swelling wood with dialkali has conventionally been used.

This has the role of swelling the wood (i-) and improving the permeability of the treatment agent, but it is difficult to uniformly swell the entire naturally uneven wood structure. The disadvantage was that it decreased.

[Purpose of the invention]

An object of the present invention is to provide a method for impregnating wood that improves moisture conductivity without reducing the strength of the wood and increases the permeability of treatment liquids such as bleaching liquid and dyeing liquid.

[Disclosure of the invention]

The method for impregnating wood according to the present invention includes a step of pretreating wood with a torsolytic enzyme, and a step of impregnating the pretreated wood with a treatment agent.

That is, this invention improves water conductivity by degrading and destroying Tornu 5, which is located in the center of the membrane pores between wood cells, using Torsu degrading enzyme, as described above. .

As the torse-degrading enzyme, a pectinase that decomposes pectin since torse 5 contains a large amount of pectin can be suitably used. By using such a pectinase, the main constituent components of wood are not decomposed, so that the wood does not deteriorate.

After pre-treatment in this way, by applying a treatment liquid such as a decolorizing liquid or a staining liquid to the wood, or by immersing the wood in the treatment liquid, the treatment liquid penetrates the entire wood through the membrane pores 1. , can be spread. This makes it possible to shorten the time required for decolorization and dyeing.

Examples of the treatment agent include a bleaching solution and a staining solution as described above, but it is also possible to bleach the pretreated wood to make the wood color uniform, and then dye it with a staining solution.

The wood used may be a decorative veneer (veneer) obtained by slicing raw wood into thin plates, but it may also be a material veneer used for manufacturing laminated decorative veneer.

FIG. 2 shows a method for producing laminated decorative veneers, in which a plurality of material veneers 6, which have been pretreated and bleached or dyed as described above, are laminated with adhesive in a mold 7 and pressed together. The flitches 8 are layered together to form an assembled flitch 8, which is then sliced to obtain a decorative veneer 9 having a wood grain pattern.

Examples (decolorization treatment) Actual example 1: Agatis 2.0 mm thick rotary veneer was immersed in a pretreatment solution containing 1.5% pectinase and adjusted to pH 4.0 at 30°C for 3 hours, and then immersed in H2O2 for 1,591 ip.
By immersing the veneer in the H10.0 decolorizing solution at 60° C. for 1 hour, it was possible to uniformly decolorize the veneer up to the center in the thickness direction.

Example 2: Agatis 1.0 rotary veneer was immersed in a pretreatment solution containing 1.5% pectinase and adjusted to pH 4.0 at 20°C for 2 hours, and then immersed in hot water at 95-100°C. Wash the veneer with hot water and apply 30 inches of H2O2 solution from the front and back to the surface of the veneer at 150 f/rr? Apply this veneer and put it on top of each other and keep the humidity at 90.
By treating the veneer at a temperature of 80 to 100° C. for 2 hours in an atmosphere of 100 °C to 100 °C, it was possible to uniformly decolorize the veneer up to the center in the thickness direction.

Fruit 7JllJ3: After reducing the pressure on Agatis 2.0 Otsu rotary veneer, a treatment solution containing 1.0% pectinase and adjusted to pH 4.0 was injected and reacted at 20°C for 1 hour.
Decolorization treatment was carried out in the same manner as in Example 2.

(Dyeing treatment) Example 4: A 2.0 m thick rotary veneer was immersed in a pretreatment solution containing 1.5% pectinase and adjusted to pH 4.0 at 30°C for 3 hours, and then dye concentration 0.5. It was possible to dye the veneer uniformly up to the center of the thickness of the veneer by dyeing with the above dye solution at 95 to 100°C for 2 hours.

Example 5: A 1.0 as thick rotary veneer was immersed in a pretreatment solution containing 1.5 qb of pectinase and adjusted to pH 4.0 at 20°C for 2 hours, and then heated to 95-100°C.
Rinse the veneer in hot water, apply the second dye solution to the front and back of the veneer, and heat the veneer to a temperature of 95% in an atmosphere with a humidity of 90 to 100%.
By treating at ~100°C for 2 hours, it was possible to dye the veneer uniformly up to the center in the thickness direction.

Case 6: China 2. After reducing the pressure on the Omr+ rotary veneer, a treatment solution containing 1.0% pectinase and adjusted to pH 4.0 was injected and allowed to react at 20° C. for 1 hour. Thereafter, it was dyed in the same manner as in Example 5.

(Decolorization and staining treatment) Example 7: Agatis 2.0 thick rotary veneer was immersed in a pretreatment solution containing 1.5% pectinase and adjusted to pH 4.0 at 30°C for 3 hours, followed by H2O21, 5 chi,
It was immersed in a decolorizing solution with a pH of 10.0 at 60° C. for 1 hour. After decolorization, a uniformly dyed veneer was obtained by dyeing at 95 to 100° C. for 2 hours in a dye solution with a dye concentration of 0.5 cm.

Example 8: Agatis 1.0-thick rotary veneer was immersed in a pretreatment solution containing 1.5 doses of pectinase and adjusted to pH 4.0 at 20°C for 2 hours, and then soaked in hot water at 95-100°C. After washing with hot water, apply 30 drops of H2O2 to the surface of the veneer from the front and back.
Apply the liquid at 150 f/rrl, stack the veneers and heat at 90 f/rrl.
~100cm I) Veneer temperature 80~100 in H atmosphere
The veneer was uniformly decolored by treatment at ℃ for 2 hours.

After decolorization, a dye solution with a concentration of 2 times the dye was applied, and the strawberry veneer was dyed by steaming treatment similar to the decolorization process, thereby obtaining a uniformly dyed veneer.

Example 9: After reducing the pressure of a 2.0 m thick rotary veneer of Agatis, a treatment solution containing 1.0% pectinase and adjusted to pH 4.0 was injected and reacted at 20°C for 1 hour. Thereafter, a uniformly dyed veneer was obtained by decolorizing and dyeing in the same manner as in Example 7.

Note that the same effect can be obtained by using other enzymes that decompose Torus 5 in membrane pores in place of the pectinase.

〔Effect of the invention〕

According to the present invention, by pre-treating the wood with a torsolytic enzyme, water conductivity is improved and the treatment agent can be impregnated uniformly and quickly. Also,
It has the effect of not causing any deterioration of the wood.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing membrane pores between wood cells, and FIG. 2 is a process explanatory diagram showing a method for manufacturing a decorative veneer. l...membrane pore, 5...to A/nu

Claims (5)

[Claims] (1) A method for impregnating wood, which includes a step of pretreating wood with Tourne degrading enzyme, and a step of impregnating the pretreated wood with a treatment agent. (2) The method for impregnating wood according to claim (1), wherein the Tourne degrading enzyme is pectinase. (3) Claim No. 1, wherein the processing agent is a decolorizing liquid.
1) The method for impregnating wood as described in section 1). (4) Claim No. 1, wherein the processing agent is a staining solution.
1) The method for impregnating wood as described in section 1). (5) The method for impregnating wood according to claim (1), wherein the treatment agent is a decolorizing liquid and a staining liquid, and the pretreated wood is decolorized and then impregnated with the staining liquid.