JPS58147302A - Manufacture of aggregate 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] [Purpose] In the manufacturing method of so-called laminated decorative veneers, in which veneers are laminated and laminated, pressed using a concave-convex die to be bonded and integrated, and then sliced, The purpose is to express materials with a wide transition width (for example, Japanese cypress, cherry tree, etc.) with high fidelity.

[Background technology] Conventionally, to express wood with a wide transition area, a rotary lace veneer is pretreated as necessary (for example, bleaching, degreasing, etc.) to change the color of the spring wood of the wood to be expressed. The dye is then applied to the surface of the dyed veneer to match the color of the transition area (hereinafter referred to as printing), the dye is allowed to penetrate into the inside of the dyed veneer, and after drying and toning, an adhesive is applied. The method used was to stack, assemble, and press with a concave-convex mold to form flitches, which were then sliced.

However, when dyeing and printing are carried out as described above, the color tone of the transition area and the spring wood color is unclear, and furthermore, because the printing penetrates the dye at a higher concentration than the spring wood color, the opposite side of the printed surface The problem was that the wood would become contaminated and the grain would become uneven.

Similarly, due to high-density printing, there was also the drawback that the surface color became too dark. This invention was made in view of the above-mentioned circumstances.

[Disclosure of invention] The details of this invention will be described below with reference to the drawings.

After combining two rotary veneers (hereinafter referred to as veneers), which are the raw material veneers in this invention, a spacer 2 is interposed, pretreatment is performed if necessary, and then the color of the transition area is changed. dye. Next, take out the dyed veneer from the dyeing tank, dye it from the mating side A using a dye solution toned to the color of spring wood, and after drying and toning, apply adhesive and align the printed surfaces in the same direction. The flitches are then laminated and pressed using a concave-convex die to create a flitch. This is then sliced to obtain the desired laminated decorative veneer.

The feature of this invention is that after the two veneers are joined together, the transition area is dyed in the color (hereinafter referred to as "match dyeing"), and then the joined surface A is printed using a dye solution toned to the spring wood color. be. The reason why printing is performed after combination dyeing is that when combined dyeing is performed, the side where the two veneers are combined (the side that is expressed in the spring wood color) may not be dyed uniformly depending on the condition of the combination, and This is because the dyeing solution is adjusted to the color of the transition area, so it is not dyed to the light spring wood color. This is also because the dyeing time is longer than in the case where there is no combination dyeing.

The conditions for printing are not limited in any way,
Any veneer that has been mixed and dyed is fine. The water content state of the veneer may be a saturated water content state, or a low water content state (20 to 50
%: dry weight basis).

The coating method is not limited in any way, and may be roll coating or spray coating. If necessary, a thickener or penetrant may be added to the printing solution.

The reason for performing cross-dying is that when expressing a material with a wide transition area, it is dyed more uniformly than by textile printing. There are no limitations on the conditions for the combination dyeing either.

Next, Example 1 will be further explained based on Examples and Comparative Examples. After rotary lace of china wood to a thickness of 111 m, two veneers 1 are put together as shown in Fig. 1, and overlapped with a spacer 2 interposed. After that, it was subjected to decolorization treatment and combined dyeing was performed under the following conditions to obtain the transition color of cherry.

<Dye formulation> PM-Brown Q, l wt% PM-
Bordex O, 01wt% A-2890, 1w
t% (all of the above were manufactured by Sumitomo Chemical ■) <Dyeing conditions> Bath ratio: 35 Temperature: 90°C Time: 4 hours After dyeing, the board was cooled and printed using the following dye formulation.

The moisture content of the veneer was saturated.

Printing liquid formulation> PM-Brown Q, 5 wt% PM-Bor
dex 0.1 wt%A-2891, Owt% Water 9B, 4wt% (all of the above are Sumitomo Chemical@III) Application was done by spray, and the amount of application was 70g/nf"t'. After that, it was dried and 50± The moisture content was adjusted to 5%, a urethane adhesive was applied, it was pressed using a mold, and it was sliced to obtain a laminated decorative veneer.

The color change in the wood grain of the decorative veneer above 5- is shown in the graph of Figure 2 in terms of L* value.

Example 2 After adjusting the moisture content of a dyed veneer that was combined dyed in the same manner as in Example 1 to 60 ± 5%, it was printed under the same printing conditions as in Example 1, and then readjusted to 50 ± 5%. It was moistened and subjected to the same steps as in Example 1 to obtain a laminated decorative veneer. The color change in the wood grain of the decorative veneer is shown in Figure 2-.

Comparative Example 1 After rotary lace of China wood to 1fi thickness, veneer was
After the sheets were stacked with a spacer interposed between them, they were decolorized and combined dyed to have the color of the transition area of cherry under the following conditions.

Dye formulation> PM-Brown Q, l wt% PM-Bor
dex O, 01 wt% A-2890, 5 wt% (all of the above are manufactured by Sumitomo Chemical ■) <Dyeing conditions> 6- Bath ratio 35 Temperature 90°C Time 4 hours After dyeing, cool the plate and print with the following dye composition I did it.

The moisture content of the veneer was saturated.

Printing liquid formulation> PM-Brown 1. Owt% PM-Bordex 0.1 wt%A-2891
, Owt% Water 97.9wt% (all of the above were manufactured by Sumitomo Chemical Co., Ltd.) Application was performed by spraying, and the application amount was 70 g/nl. Thereafter, it was dried and adjusted to a moisture content of 50±5%, coated with urethane adhesive, pressed with a mold, and sliced to obtain a laminated decorative veneer.

The color change in the wood grain area of the decorative veneer is shown in the graph of FIG. 2 in terms of L* values.

[Effects] This invention is characterized by applying printing from the mating surface after mating dyeing, so the tree species with a wide transition area can be expressed with good fidelity, and the unevenness of dyeing caused by the mating dyeing is also erased by printing. The variation in color was also reduced and a higher quality laminated decorative veneer was obtained.

[Brief explanation of the drawing]

FIG. 1 is a diagram for explaining the method of combination staining, and FIG. 2 is a graph showing the staining state in Examples using L* values. 1...Single plate 2...Spacer patent applicant Matsushita Electric Works Co., Ltd. Representative patent attorney Toshimaru Takemoto (and 2 others)

Claims (1)

[Claims] (1) In the manufacturing method for laminated decorative veneers, in which raw veneers are dyed, laminated and laminated, pressed using a concave-convex die to be bonded and integrated, and then sliced, when dyeing the raw veneers, A method for producing laminated decorative veneer, which is characterized by combining two sheets and then dyeing the combined surface to the color of the tree species to be expressed by applying λ printing.