JP3175150B2 - Method of manufacturing wooden veneer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to furniture, housing equipment,
TECHNICAL FIELD The present invention relates to a wooden decorative board used for makeup of interior building materials, particularly to a wooden flooring.

[0002]

2. Description of the Related Art A wooden veneer in which a veneer obtained by injecting a synthetic resin such as polyester resin into a veneer veneer obtained by thinly slicing a natural precious wood and pasting it on a wood substrate such as plywood, particle board, or fiberboard has been used. Widely used for makeup of furniture, housing equipment and interior building materials. In particular, in the case of flooring, the WPC process of injecting a synthetic resin into a decorative veneer for the purpose of improving the surface hardness of the veneer veneer, making the veneer semi-transparent, visually giving a three-dimensional effect and creating a sense of quality. Widely used.

[0003] In addition, decorative veneers made of natural precious wood are expensive and rare, and artificial veneer veneers have been used instead of veneered veneers made of natural precious wood. Artificial makeup veneers are made from thin slices of inexpensive and large quantities of natural wood, decolorized and dyed as necessary, and laminated and bonded to a large number of them to produce flitches. It is sliced in the direction intersecting with the laminated surface to obtain a decorative veneer similar to a natural precious wood.

[0004]

[Problems to be solved by the present invention]
Solid wood such as hinoki, pine, zelkova, oak, cherry, etc. has been particularly preferred, and even today, natural precious wood veneers, such as hinoki, pine, zelkova, oak, cherry, etc., are the most frequently used as surface decorative materials. Have been. If the flooring was made of solid wood of these species, minor wear and tear on the surface did not matter much.

However, in recent years, since solid wood resources used for flooring materials have decreased and prices have risen accordingly, most of wooden flooring materials have been placed on the surface of relatively inexpensive wood base materials such as plywood. Floor materials to which a thin decorative veneer having a thickness of about 0.2 to 1 mm is attached have become mainstream. Therefore, as a measure against wear and surface damage, a so-called WPC process has been performed in which a resin is injected into a decorative veneer on the surface to improve the hardness of the veneer.

However, many hardwood decorative veneers such as oak and cherry blossoms are subjected to WPC treatment, so that the synthetic resin used for the veneer is impregnated into the entire veneer and the overall surface feels flat. However, there is a problem in that the appearance lacks the three-dimensional effect seen in the grain of a natural tree, and the depth inherent in the natural precious wood is lost.

On the other hand, in the case of a coniferous veneer having a large difference in color tone between the spring lumber and the autumn lumber such as inland pine, and having a clear grain,
When the WPC process is performed, the resin is sufficiently injected into the spring wood part, but the resin is hardly injected into the autumn wood part. Remains opaque, and the appearance is such that the spring wood part and the autumn wood part are switched.

In general, the width of the spring lumber is considerably wider than the width of the autumn lumber in any other conifers, not limited to inland pine. Before WPC processing, no unnatural feeling is received separately, but if the spring wood part and the autumn wood part appear to be switched by WPC processing, the width of the autumn wood part looks wider than the width of the spring wood part, Feels unnatural.

Therefore, in the case of using a tree species having a clear color tone difference between the spring lumber part and the autumn lumber part by WPC processing, it is necessary to select and use those having a small difference in width between the spring lumber part and the autumn lumber part. There is
Therefore, the procurement cost of the veneer increases. In addition, even if the difference between the widths of the spring lumber and the autumn lumber is relatively small, the wider and coarser the grain, the more noticeable the phenomenon of switching between the spring lumber and the autumn lumber is. Is used to select those with a dense wood grain, in which the switching phenomenon is not noticeable. Therefore, the veneer procurement cost is further increased.

[0010] In place of expensive inland pine, a method of obtaining a veneer veneer similar to inland pine by WPC treatment of inexpensive veneer pine or hemlock veneer is also known. When sorted, even inexpensive rice pine or rice hemlock that can be used as a substitute for inland pine is still scarce and expensive.

As described above, when the decorative veneer is subjected to the WPC treatment, the purpose of improving the surface strength can be achieved. However, in many hardwoods, there is a problem that the depth peculiar to natural precious wood is lost. On the other hand, in the case of conifers, there is a problem that an unnatural grain pattern is formed due to a phenomenon in which the spring wood part and the autumn wood part are switched.

The present invention is intended to solve the above problems by means described below.

[0013]

According to the present invention, in the production of a decorative veneer, first, a veneer of a tree type that becomes translucent when a resin is injected and a veneer of a tree type that does not become translucent are prepared. A veneer of a tree species that does not become translucent even if resin is injected constitutes a portion corresponding to the target spring wood portion of a natural precious wood. A translucent tree species is, for example, Agathis, and a non-translucent tree species is Garogalo.

Next, these two types of veneers are alternately laminated and bonded to produce a flitch, and the flitch is thinly peeled off by a slicer or a rotary lace in a direction intersecting the lamination surface.
Obtain artificial veneer veneer. After drying, a resin such as polyester is injected and subjected to a WPC process.

Subsequently, the artificial wood veneer obtained above is attached to a wood base such as plywood.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, Agathis, Barswood, Ayous, White Silis, Gelton, Canalium, Terminaria, Ramin, planchonella, amberoy and the like. Tree species that do not become translucent include Garogaro, Magashiro, Apitong, Kapoor, Yellow Meranti, Kelongan, Jonkon, Nato and the like.

The thickness of the veneer is determined with reference to the grain width of the target natural precious wood, and is about 0.3 mm to 2 m.
About m is appropriate. When a veneer having a thickness of 2 mm or more is peeled off with a slicer or a rotary lace, the veneer cracks easily occur. If you slice a flitch made of laminated 2 mm thick veneers at an angle smaller than the right angle to the lamination plane, you can express wood grain of 2 mm or more in width, so you need to take the risk of cracking. Because there is no. Also, since wood grain of 1 mm or less is hardly seen in natural wood, if the minimum thickness of the veneer is set to 0.3 mm, the flitch is sliced in a direction crossing the laminating plane at an angle smaller than a right angle. However, the grain width of most natural trees can be expressed.

Natural precious wood is considered to be valuable mainly because its unique grain, color and pattern, luster, shape and arrangement of conduit grooves, etc. are excellent in aesthetic appearance. In order to manufacture artificial veneer veneer similar to natural precious wood, first, the shape and arrangement of conduit grooves similar to the target natural precious wood,
One type is selected from each of the above two categories. The thickness of the two kinds of veneers selected may be the same, but the width of the grain is usually 1 to 3 times the width of the autumn lumber, so that the wood type becomes translucent when resin is injected. The ratio between the thickness of the veneer and the thickness of the veneer that is not translucent is set in a range of 1: 1 to 3 with reference to the target grain of the natural precious wood.

Regarding the color tone, the color tone of the veneer which does not become translucent when resin is injected is selected from the color tone similar to that of the spring material portion of the target natural precious wood.
It is preferable to select a color similar to that of the autumn lumber of the target natural precious wood. However, it is often difficult to select tree species having similar shapes and arrangements of conduit grooves and similar colors. In that case, even if the color tone is not very similar, it can be made to resemble the color tone of the target natural precious wood by decolorization or dyeing, or by a combination of decolorization and dyeing, so that a veneer of an appropriate color tone can not be obtained In this case, decolorization and staining are performed. In addition, for veneers of translucent wood species, the veneer itself does not necessarily have to be dyed, but the color tone is too dark and the original color remains even after translucent, and the target color tone of the natural precious wood In the case of a veneer that does not fit, it is necessary to at least decolorize.

According to the above, when the pre-processing of the veneer is completed,
A veneer which is made translucent and a veneer which is not translucent when resin is injected are alternately laminated and adhered to produce a flitch, which is thinly peeled off to obtain a veneer veneer. After drying this, a WPC process is performed.

FIG. 1 is a sectional view of a decorative board according to the present invention. In FIG. 1, the portion C corresponding to the autumn lumber portion is filled with resin, is made translucent, and can be seen through the veneer, so that the thickness of the veneer can be observed and found in natural precious wood. The depth is exuded. On the other hand, the portion D is a portion corresponding to the spring material portion of the veneered veneer veneer, and in the deaeration step before the resin injection in the WPC process, air that could not be removed even if the pressure was reduced was minutely contained in the resin. This remains irregular bubbles, which diffusely reflect light, so that it does not become translucent even though a considerable amount of resin is injected. Nevertheless, the portion F very close to the surface of the veneer is sufficiently evacuated and translucent, so see through the translucent portion F very close to the surface and equivalent to the spring wood part. Color tone is observed, and a three-dimensional effect is visually perceived.

As described above, the decorative veneer according to the present invention is
In the spring veneer part and the autumn timber part of the veneer veneer, the translucent portions are both seen through, so that a three-dimensional effect can be visually sensed.

When a veneer is manufactured by bonding the above-described WPC-treated veneer to a wooden base material, the wooden base material is previously colored and painted in the color of the target autumn wood part of the natural precious wood. It is desirable to keep. This is because the color tone of the wooden base material may not always match the target autumn color of the natural precious wood. Instead of coloring, a dye or a pigment of the autumn color of the target natural precious wood may be mixed into the adhesive used for veneer bonding.

If a colored layer E of the same color as the target autumn lumber of the natural precious wood exists between the wooden veneer A and the wooden base material B,
Since the color tone of the colored layer E, that is, the color tone of the target autumn lumber of the natural precious wood, is observed through the translucent veneer C,
A three-dimensional effect can be visually perceived. In this case, if the veneer itself is dyed in advance in the same color as the target autumn lumber portion of the natural precious wood before the WPC process, the veneer is transparently colored with a thin veneer color. Since the color tone of the layer is observed, a more natural three-dimensional effect can be felt.

The portion of the veneer D corresponding to the spring material portion which does not become translucent even when the resin is injected is seen through the veneer, the color tone of the colored layer E is not observed, and the veneer C itself which is not translucent. Is observed. Therefore, when the color of the veneer itself does not match the target spring wood color of the target natural precious wood, as described above, the veneer itself is dyed in a color tone that resembles the target spring wood part of the natural precious wood. Need to be kept.

As described above, when a decorative veneer is manufactured by bonding a decorative veneer according to the present invention to a wooden substrate, the wooden substrate is preliminarily subjected to the color tone of the target autumn wood part of the natural precious wood. If painted in advance, the see-through depth is observed differently in the spring wood part and the autumn wood part, so as a decorative board with a depth very similar to the target decorative board with natural precious wood It is recognized.

As described below, from the economic point of view, the types of tree species which are liable to be made translucent and those which are not translucent when the resin is injected are classified from the viewpoint of economy under the conditions of resin injection which is usually performed. This is a classification, ignoring economics, and does not presuppose further degassing under reduced pressure or resin injection conditions under high pressure. That is, using a synthetic resin such as polyester or acrylic having a molecular weight of 500 to 8000,
g / cm ² -0.1 kg / cm ² under reduced pressure of 0.5-2
Degassing the veneer for 0 hours, followed by 1 kg / cm ² -1
After pressurizing and injecting at 0 kg / cm ² for ² to 20 hours,
Whether it becomes translucent or not is the classification criterion.

Also, there is a difference in the difficulty of translucency among the tree species classified as translucent in the above classification, and the spring lumber section and the autumn lumber section differ depending on the target precious wood veneer. Some of the species are indistinct, such as inland pine, so it is desirable to select a tree species by conducting a simple preliminary experiment and selecting the species after confirmation.

For example, when trying to obtain an artificial veneer veneer similar to a hardwood sen, the sen has a relatively small difference in color tone between the spring and autumn wood parts, and the grain is not conspicuous. You can choose a combination of tree species that does not have a large difference, and on the other hand, aim at a decorative veneer of natural precious wood, such as inland pine, where the color difference between the spring lumber and the autumn lumber is clear In such a case, it is necessary to select a combination of tree species having a large difference in difficulty in translucency.

As for the inland pine, as shown in the examples, when Garogallo is selected as the tree species corresponding to the spring lumber and Agathis is selected as the tree species corresponding to the autumn lumber, it is very similar to the decorative board on which natural inland pine is pasted. Can be manufactured.

Agathis has a small difference in shades of light and shade within the same veneer and is light in color, so that it can be easily dyed in various colors without decolorization. Further, since there is a small difference in the color tone, there is an advantage that a large number of similar color tone can be procured. Agatis has a unique myelin, but it becomes almost invisible by WPC treatment after decolorization, so that it can be used for the portion corresponding to the autumn lumber of many artificial veneer veneers according to the present invention.

[0032]

EXAMPLE A 200 mm single veneer of Agatis and a 200 mm veneer of 1 mm thick were prepared, and the veneer was decolorized using hydrogen peroxide. 3 at 95 ° C, 1.2 atm.
Dipped for hours to dye. After dyeing, the dye was immersed in a 1% concentration surfactant solution to remove excess dye and washed with water.

Formulation of acid dye for Garogaro veneer dyeing YERROR 0.08 g / liter (water) RED 0.15 g / liter (water) NAVY BLUE 0.02 g / liter (water) Dyeing assistant 9 CC / liter (water)

Next, the agatis veneer was decolorized using hydrogen peroxide, and then added to an acid dye having the following composition at 95 ° C.
Dyeing was carried out by dipping under a pressure of 1.5 atm for 5 hours. After dyeing, the dye was immersed in a 1.5% surfactant solution to remove excess dye and washed with water.

Formulation of acid dye for Agathis veneer dyeing YERROR 0.4 g / liter (water) RED 0.7 g / liter (water) NAVY BLUE 0.3 g / liter (water) Dyeing assistant 9 CC / liter (water)

The dyed veneer was laminated and bonded using a moisture-curable urethane-based adhesive to produce a flitch, which was sliced to a thickness of 0.3 mm with a slicer. The sliced veneer was dried to a moisture content of 7%, and decompressed at 0.03 atm for 6 hours.
The polyester resin was immersed in an unsaturated polyester resin solution at 2.5 atm for 18 hours to inject the polyester resin into the veneer, and subjected to WPC treatment.

Next, the plywood is colored with a paint containing a pigment of the same color as the dyed agatis veneer, and the W
A PC-treated veneer was applied, and a transparent urethane coating was applied.

Although the decorative board manufactured as described above is a thin decorative veneer, the grain is very similar to the inland pine in both the color pattern and the grain width, and the grain is three-dimensional. It has the same deep appearance as natural inland pine.

[0039]

In the decorative panel according to the present invention, the veneer part which is made translucent by injecting a resin is colored into the target autumn color of the natural precious wood through the translucent veneer layer. Observed background color is observed. On the other hand, in the veneer that does not become translucent even when the resin is injected, air that has not escaped in the deaeration step before the resin injection remains as fine bubbles in the resin, and this diffusely reflects light. , Recognized as a spring lumber of natural precious wood. However, the part very close to the surface of this veneer,
Since the air is sufficiently evacuated to be translucent, a part which is not transparent is observed by seeing through the translucent part which is very close to the surface, and this part also has a visually three-dimensional effect.

As described above, in the decorative veneer according to the present invention, the spring material portion and the autumn material portion of the decorative veneer are three-dimensionally perceived by see-through, and the see-through depths are different from each other. The three-dimensional appearance is felt like a grain of a precious wood, and it is recognized as a decorative board very similar to a decorative board on which a natural precious wood veneer is pasted.

[Brief description of the drawings]

FIG. 1 is a sectional view of a decorative board according to the present invention.

[Description of Signs] A decorative veneer B wood substrate C translucent veneer D non-translucent veneer E colored layer F translucent portion

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B27D 5/00 B27K 5/02 B27L 5/00

Claims (4)

(57) [Claims] 1. A method for producing a wood decorative board to which an artificial natural precious wood veneer is pasted, comprising: 1. Prepare a veneer of Agathis and a veneer of Garogaro, 2. A veneer is manufactured by alternately laminating and adhering the veneers of the two tree species, and the flitch is thinly peeled off with a slicer or a rotary lathe in a direction intersecting the laminating surface to form a veneer . 3. after degassing the veneer under reduced pressure, pressurize and inject the resin; The veneer is attached to a wooden base material that is colored and painted in the target autumn color of natural precious wood using an adhesive, or a wooden base material using an adhesive mixed with the dye or pigment of the autumn wood color. A method for producing a wooden decorative board, which is attached to a wooden board. 2. A method for producing a wood decorative board to which an artificial natural precious wood veneer is pasted, comprising: 1. Decolorized Agathis veneer and Garogalo veneer or dyed in spring wood color without decolorization; 2. A veneer is manufactured by alternately laminating and adhering the veneers of the two tree species, and the flitch is thinly peeled off with a slicer or a rotary lathe in a direction intersecting the laminating surface to form a veneer . 3. after degassing the veneer under reduced pressure, pressurize and inject the resin; The veneer is attached to a wooden base material that is colored and painted in the target autumn color of natural precious wood using an adhesive, or a wooden base material using an adhesive mixed with the dye or pigment of the autumn wood color. A method for producing a wooden decorative board, which is attached to a wooden board. 3. A method for producing a wood decorative board to which an artificial natural precious wood veneer is pasted, comprising: 1. Agate veneer is decolorized or dyed in autumn wood color without decolorization, and Galogaro veneer is decolorized or dyed in spring wood color without decolorization. 2. A veneer is manufactured by alternately laminating and adhering the veneers of the two tree species, and the flitch is thinly peeled off with a slicer or a rotary lathe in a direction intersecting the laminating surface to form a veneer . 3. after degassing the veneer under reduced pressure, pressurize and inject the resin; The veneer is attached to a wooden base material that is colored and painted in the target autumn color of natural precious wood using an adhesive, or a wooden base material using an adhesive mixed with the dye or pigment of the autumn wood color. A method for producing a wooden decorative board, which is attached to a wooden board. 4. The thickness ratio between the single plate of Agathis and the single plate of Garogaro is 1 to 1 to 3.
The method for producing a wooden decorative board according to the above.