JPS5924607A - Manufacture of high-density colored 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 Jin's invention d relates to a method for producing a high-density colored veneer.

(rj east, dyeing the plate, impregnating the surface of the lli plate with the dye solution 1!';!:)ξ has been obtained. However, when dyeing in this way, the dye image does not penetrate into the interior of the veneer. The interior of the stained veneer shown in U I') was not stained. In addition, the physical properties of the veneer itself may have an adverse effect on the dyed veneer. For example, dyeing a rotary veneer (1*i thickness) made of agathis wood had the following problems.

■ The adsorption of dye to the surface of the veneer is large, causing the surface of the veneer to darken significantly, and the dyed veneer has a color difference Δ between the surface and the inside.
There were 10 or more E's.

■ The physical properties of the veneer (for example, compressive strength, compressive Young's modulus) varied greatly between lots, and the physical properties of the resulting dyed veneers varied considerably.

■ Yield was low due to defects such as two knots in the gloss of the veneer and cracks.

This invention1 was made in view of these circumstances,
The first step is to laminate a plurality of colored veneers using a colored adhesive that exhibits the same color as the internal color of the veneer, and then slice the resulting laminate perpendicularly to the laminated surface to create sliced veneers. Step 1 and stack multiple sliced veneers using the colored adhesive above! The second step is to create sliced veneers by slicing the laminate (17 perpendicular to the carved surface).
The gist of this is to perform the above pR2-2 procedure a specified number of times.

That is, by doing the above, ll
It becomes possible to obtain a uniformly colored veneer with a high yield and less variation in the illuminance.

Next, we will explain this invention in detail based on one example.
I will clarify.

The high-density colored veneer according to the present invention is manufactured as follows.

)) The material t and board B are dyed and colored in a predetermined color to obtain a colored veneer l as shown in FIG. Next, Zono 1
13. Pigment is mixed with the adhesive so that it has the same color tone as the internal color of the plate 1, and a colored adhesive is interposed between the plate 1 and the plate 2 as shown in Figure 2. Inside, multiple sheets are laminated and compressed. As shown in FIG. The veneer 4 is sliced to obtain a slice veneer 4 as shown in FIG. 4. Next, the colored adhesive described above is applied to the obtained veneer 4, and a plurality of veneers are laminated as shown in FIG.

The flitch 5 obtained by pressing is sliced in the thickness direction as shown in FIG. Repeat this operation two or more times 1/
By slicing the final flitch into the desired thickness, a high-density colored veneer 6 as shown in Fig. 7 is produced.
is obtained. That is, this veneer 6 has a large number of strip-shaped colored adhesive layers extending vertically and densely in the length direction, and strip-shaped colored adhesive layers horizontally extending between the vertical colored adhesive layers. It extends in the length direction, and has a structure in which the wooden part is hardened with a band-shaped adhesive layer, so it has a high density, has little variation in physical properties of the veneer, and has almost no color difference between the surface and the inside. There isn't.

Examples will be explained in detail.

[Example 1] A rotary veneer made of Agatis, a southern Japanese linden tree, with a thickness of 1 and Qws was bleached and then dyed. The internal color of the dyed veneer in Otsu is L.
, a, b not shown I--68,0, a-5,8
.

1) *=20.0. Next, pigments having the following composition were mixed into the urethane adhesive so as to match the internal color tone of the dyed veneer.

(Pigment composition) I) icton While (manufactured by Dainippon Ink Co., Ltd.) 2
0 parts (weight, same below) 1) icton I%roWn
6174 ('/) 0.7 part 1) icL
onYellow (tt) 0.3 parts urethane adhesive' ([7091 (manufactured by Konishi) 100
Part: A plurality of colored veneers were laminated in a flat mold with this colored adhesive interposed between the veneers at a coating rate of 100 f/pH for 2 hours at a pressure of 10 kQ/crJ.
It was tightened under the condition of time. The flitch thus obtained was sliced in the thickness direction to a thickness of 0.3 to 0.5 mm.

Furthermore, the colored adhesive described in item 11 was applied to the 11 plates on the slice side (application h: 170 to 90 f/nf), and multiple sheets were stacked in a flat mold and pressed under the same pressing conditions as above. did. The flitch thus obtained was sliced in the thickness direction to a thickness of L and Q MIX. the result,
High-density colored tF plates were obtained with good yield. The physical properties of the LLI board obtained by E-processing are shown in the following table in comparison with conventional dyed veneer.

(Margin) From the table 2, it can be seen that the mechanical properties of the colored veneer 1 of this invention are greatly improved compared to the conventional ones. It can be seen that the variation in physical properties is small, the color difference between the surface and the inside is small, and the color shading in the thickness direction is small.

[Example 2] As a colored adhesive, the following face pigment 1 (pigment composition) was added to a room temperature curing vinyl acetate urea adhesive.
PJ) 15.0 parts Dicton Brown (manufactured by Inu Nippon Ink Co., Ltd.) 0.8 parts 13 icton Yellow
Using a mixture of 3 parts of w (tt) Q, it was applied at a ratio of 1001/nl to the fl and y color veneers obtained in steps 1 to 1 in the same manner as in Example 1, and the mixture was applied at a pressure of 10 kQloJ.
The flitch was formed by pressing under the conditions of 12 hours. From this point on, a sliced veneer was obtained in the same manner as in Example 1. The obtained Qi plate, like that obtained in Example 1, had excellent Young's modulus and crushing strength, small variations in physical properties, and small color difference between the inside and the surface.

As described above, the present invention involves laminating several colored veneers using a colored adhesive that exhibits the same color as the internal color of the veneer, and slicing the resulting laminate perpendicular to the laminated surface. A second process involves laminating a plurality of sliced veneers using the above-mentioned colored adhesive and slicing the resulting laminate perpendicularly to the laminated surface to create sliced veneers. Because the second step is performed an arbitrary number of times, the physical properties of the iii board are improved compared to conventional ones, and there is less variation between lots, and the color difference between the surface and the inside is small. High-density colored veneers can be manufactured with good yield.

[Brief explanation of drawings]

FIG. 1 through FIG. 7 are detailed explanatory diagrams of the present invention. l...Colored veneer 2...Flat plate 3...Laminated body 4
... Sliced veneer 5 ... Flitch 6 ... High-density colored veneer Patent applicant Matsushita Electric Works Co., Ltd. Agent Patent attorney Takehiko Matsumoto Figure 1 Figure 3 Figure 4 Figure 6 Figure 7

Claims (1)

[Claims] (1) A plurality of colored t) boards are laminated via a colored adhesive that exhibits the same color as the internal color of the veneer, and the resulting two laminates are sliced perpendicular to the laminated surface to produce sliced veneers. i
The first step is to create a plate, and the laminate obtained by laminating a plurality of sliced t'It plates using the colored adhesive described above is placed on the laminated surface. A method for producing a high-density colored veneer, comprising a second step of vertically slicing the veneer to form a sliced veneer, and performing the second step an arbitrary number of times.