JPH0383601A - Colored veneer laminated article - Google Patents

Abstract

PURPOSE:To obtain a colored veneer laminated article which is excellent in hue and a grain pattern of veneer by bonding and laminating extremely thin or thin decorative veneer having 10 - 70% transparency on colored paper, nonwoven fabric or a resin film and thereafter applying a transparent coating layer on the surface. CONSTITUTION:Colored paper 4 is obtained by coloring white thin paper with a specified colorant. A base material 2 is applied by an SBR-based thermosetting adhesive (colored)contg. a masking agent (titanium white). Then colored paper 4 is overlapped thereon and these are thermally clamped. An SBR-based thermo setting adhesive (noncolored) is applied to the colored paper 4 by utilizing a spreader (NRC). Extremely thin decorative veneer 1 having 10 - 70% transpar ency (t) calculated by the formula I ((d) shows transparency % according to JIS, P-8138) is overlapped on the adhesive layer 5 and these are thermally clamped. Ligneous parts of maple and color of the substrate are obviously expressed and singular design in which these are superposed can be created.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a novel colored veneer laminate product using ultra-thin or thin decorative veneers. This laminate can be applied as a decorative surface material for furniture items such as chests of drawers and cupboards, as well as surface materials for office desks, interior materials for buildings, and interior materials for ships and the like.

(Conventional technology) In recent years, with improvements in veneer cutting technology, it is now possible to cut ultra-thin decorative veneers with a thickness of 0.04 to 0.18 yen, which is even thinner than so-called thin veneers, with more stable quality than natural precious wood. It became possible.

This ultra-thin decorative veneer is economically advantageous in that it can be produced at a high yield per unit amount of precious wood, so it is not only suitable for conventional veneer uses, but also for the development of new products using it. It was needed.

On the other hand, recently, due to changes in consumer tastes, although products are made using veneer, colored products have hues that are completely different from those of natural precious wood, such as yellow, blue, and gray. In particular, the demand for

Conventional methods for coloring such products include directly applying a coloring agent to the veneer surface of the produced veneer product, or spraying or painting a paint containing the same (hereinafter referred to as method A); The veneer itself can also be bleached to some extent with bleach beforehand, following a method similar to that used for dyeing textiles.
The veneer is colored by dipping it in a dyeable resin solution (hereinafter referred to as method B), and by coating or dipping it in an aqueous solution of potassium permanganate, potassium dichromate, iron sulfate, iron wood acetate, etc. There is a chemical coloring method (hereinafter referred to as Method C) in which wood is brought into contact with the wood to cause a chemical change with the wood components (mainly tannins), resulting in coloring.

Method A is the most commonly used method in the fields of furniture, cabinets, etc. Furthermore, Method B and Method C are methods used in the same field depending on the circumstances and conditions.

Additionally, colorants have traditionally been commonly used in laminated products using veneers, but their primary purpose is to...

The purpose was to hide the material on the lower side of the veneer and prevent the color of the material from being reflected on the surface of the product through the veneer.
3-92403 etc.

This section describes techniques related to such concealment methods.

Additionally, in order to prevent product cracking, damage, or adhesive seepage, it is common practice to fill cracks and pores in the surface of veneers and substrates with a coloring agent of the same color. For example, JP-A-60-154060 and JP-A-60-154060 describe techniques for applying colorants for such purposes.

Furthermore, for the special purpose of clarifying the wood grain between spring wood and summer wood, we have developed a method for producing colored wood (hereinafter referred to as "coloring agent") in which a coloring agent is mixed into the adhesive or into the resin contained in the veneer. ,
(technique) is already known (Japanese Unexamined Patent Application Publication No. 1989-1999)
-174603, JP-A-60-176715, and JP-A-63-102902).

This technique is a special way of using colorants, and is only used in a very limited range of applications in the field of furniture and the like.

(Problem to be Solved by the Invention) However, the method A described above is a method in which a layer of coloring agent is formed on the veneer and the surface of the veneer is coated with it, so it does not solve the problem that natural wood naturally has. It had a serious drawback in that it obscured the design of the material to some extent, reducing its clarity and excellence by half, and in some cases almost losing it.

On the other hand, methods B and C usually form a transparent coating on the surface of the veneer.

In the case of method A, it is not as bad as the grain design of the veneer is reflected on the product surface.

However, since the fine grains of the veneer were considerably erased by impregnation with the coloring agent 1, the projected wood grain design was not sufficiently clear and excellent to be satisfactory.

Moreover, the soaking time required to achieve sufficient impregnation of the colorant inside the veneer is typically extremely long, ranging from several hours to tens of hours, and Methods B and C require long processing times and are difficult to manufacture. It had the disadvantage of being of low quality. This drawback also applies to the above techniques.

In addition, method B has the inconvenience that the veneer is very likely to be damaged during processing and requires special care when handling the veneer. If the same method were applied to ultra-thin decorative veneer,
The occurrence of such damage accidents will continue to increase.

Furthermore, in the above technique, the colorant contained may bleed from the inside of the veneer to the surface, and in this case, the difference in shade between the bleed area and the non-bleed area is extremely large. There was a problem in that the surface of the board had to be colored in a dark shade.

The present invention has been made in consideration of the above-mentioned circumstances, and its purpose is to provide a colored product using recently developed ultra-thin decorative veneer or thin decorative veneer. To provide a colored veneer laminate product in which different hues and wood grain patterns of the veneer are overlapped and projected, and the fine grain of the veneer is faithfully revealed.

(Means for Solving the Problems) The present inventor has conducted extensive research to develop a new colored product using ultra-thin or lightly decorated veneer, and as a result, firstly,
We discovered that unless we use ultra-thin or lightly decorated veneers with high transparency and transparent adhesives, the color of the underlying coloring material would not be reflected on the product surface through the veneers, etc., and continued our research. However, linear formula (1) % formula %) (1) [where d represents the opacity (%) measured by a test according to JIS P-8138. ] An ultra-thin or lightly decorative veneer with a transparency t calculated from 10 to 70% is pasted on a board or sheet, for example, in red color,
By attaching blue or yellow colored paper, colored nonwoven fabric, or colored resin film via a transparent adhesive, and then applying a transparent paint to the surface of the veneer, it is possible to create a color that is completely different from the wood tone, for example. colored plates, etc.
The original grain pattern of natural wood is faithfully reflected on the product surface,
The inventors discovered that it was possible to obtain a colored veneer laminate product that did not lose any of its clarity and excellence, and completed the present invention.

That is, the present invention provides transparency t calculated from the following formula (1) (% formula %) (1) [where d represents the opacity (%) measured by a test according to JIS P-8138] An ultra-thin or thin decorative veneer with a coating of 10 to 70% is pasted via a transparent adhesive onto colored paper, colored non-woven fabric, or colored resin film that has been adhered to a base material with an adhesive, and then the A colored veneer laminate product characterized by coating the surface of a thin or lightly decorated veneer with a transparent paint layer.

Therefore, the laminate according to the present invention includes, from above, a transparent paint layer, an ultra-thin or thin decorative veneer, a transparent adhesive layer, a coloring material (colored paper 1 colored nonwoven fabric or colored resin film), an adhesive layer, and a base material. It is layered.

The ultra-thin or thin decorative veneer used in the present invention has a thickness of 0.05
Among veneers with a thickness of 0.251 am to 0.251 am, preferably ultra-thin veneers with a thickness of 0.10 to 0.18 am, mainly light-colored veneers with high transparency, and the following formula (1) % formula %) (1) [where d is Japanese Industrial Standard Paper opacity test method]
represents the opacity (%) measured by a test according to JIS P-8138.
70% is required.

When the transparency t is within this range, the transparency allows the hue of the colored non-woven fabric or colored resin film as the base to be clearly seen through to the surface side, and the hue of the base allows the appearance of the grain pattern of the veneer. does not interfere in any way.

On the other hand, when the transparency t is less than 10%.

Due to the opacity of the veneer, the color of the underlying colored paper cannot be clearly seen through it, and if the Kodo lightness t exceeds 70%, the transparency is too high, and the fine grains of the veneer become more visible through the underlying paper. etc., and the grain of the veneer is obscured on the surface of the product. Furthermore, if t exceeds 70%, the material becomes very thin, making it difficult to handle it after cutting or during the lamination process.

Examples of wood species for the ultra-thin or thinly decorated veneer include silver heart, maple, Japanese oak, birch, camphor, beech, pine, and hemlock. be.

Ultra-thin or thin decorative veneers can also be used for direct lamination bonding with base plates cut to the desired thickness, or are usually (
Especially in the case of ultra-thin decorative veneers), after lamination bonding, for example #
240 coarse sand vapor is used to reduce the thickness to the desired thickness, for example from a 0.25m5 thick veneer to a 0.15mm thick veneer, and then the next step is transparent painting. served. At that time, an appropriate coloring agent may be applied to the surface of the veneer as a complementary color. In addition, the veneer is
You may use one that has been bleached in advance or one that has been impregnated with resin.

In addition, colored paper, colored nonwoven fabric, and colored resin film are
There are no restrictions on the color, and it is sufficient to use materials that have been given a desired color, especially materials that are completely different from the recently popular wood color, such as dark gray or blue. The coloring material may have a pattern of two or more colors, or may have a design or picture formed thereon.The coloring of these paper, nonwoven fabrics, or resin films may be done to prevent color unevenness. , is required to be uniform.

The transparent adhesive is a colorless and transparent adhesive that has good adhesion to veneers and colored paper, etc., and preferably has as high transparency as possible. The material must be incompatible with the agent, and must be such that it does not dissolve, penetrate into the interior of the veneer, or seep out onto its surface.

Suitable transparent adhesives include, for example, SBR thermosetting transparent adhesives and vinyl acetate transparent adhesives.

The base material is not particularly limited, and may include board materials such as veneer plywood,
The sheet may be, for example, white coated paper.

As the adhesive used for adhering the colored paper or the like to the base material, conventionally used adhesives can be used.

Finally, the uppermost transparent paint layer may consist of a transparent paint that is highly permeable to ultra-thin or thin decorative veneers, i.e. a relatively low molecular weight and low viscosity paint, such as polyurethane-based, amino Common transparent paints such as alkyd-based, polyester-based, and lacquer-based paints can be applied.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

Example 1 The colored veneer laminate of this example shown in FIG.
This is a product using an ultra-thin decorative veneer 1 with a thickness of 27.2%.From above, a transparent paint layer 6 of polyurethane paint, the ultra-thin decorative veneer 1. Transparent adhesive layer 5 of SBR thermosetting adhesive (non-colored), indigo colored paper 4. SBR thermosetting adhesive (
The adhesive layer 3 (coloring) and the base material 2 of lauan plywood were laminated and crimped, and the product was manufactured through the following steps (1) to (2).

■First, colored paper 4 is made by coloring white tissue paper with a basis weight of 40 g/l with an indigo coloring agent.

■ Apply an SBR thermosetting adhesive (colored) containing a hiding agent (titanium white) to the base material 2, then layer the colored paper 4 on top of it, and heat it under the conditions of 6 kg/a1 x 110°C x 90 seconds. It was compressed.

■Next, use a spreader (NRC) to apply an SBR thermosetting adhesive (non-colored) onto the colored paper 4, and then apply the adhesive layer 5 uniformly using a reverse roll coater (RRC). I scratched it.

(2) Then, an ultra-thin decorative veneer l was placed on top of the adhesive layer 5, and then heat-pressed under the conditions of 6 kg/as'' x 110°C x 90 seconds.

(2) Thereafter, the surface of the veneer L was polished using Sand Vapor #800.

■Finally, a polyurethane paint was applied to the surface of the veneer 1 to form a paint layer 6.

In the laminate product of this example, the maple wood grain and the indigo color of the base were both clearly reflected, creating a unique design in which they overlapped.

Other Examples and Test Examples Instead of veneer 1, various ultra-thin decorative veneers of different wood species and thicknesses were used, and the opacity d was measured by a test according to Japanese Industrial Standard JIS P-8138. Transparency t (
-100-d), color veneer laminates of the following Examples and Comparative Examples were manufactured according to the procedure described in Example 1.

The above test was carried out under the conditions of temperature 20 ± 1" C1 humidity 65 ± 2%, and the sample was backed with white and black standard plates.
This was done by measuring each reflectance using a green filter, and the ratio of the latter to the former was determined as the opacity d (%).

The results and the appearance evaluation of the obtained laminate are summarized in Table 1 below.

In this table, ◎ indicates the best appearance, ○ indicates good appearance, and X indicates poor appearance.

Table 1 As can be seen from this table, the transparency t is 1 as in the example.
When ultra-thin or thinly decorated veneers with a thickness of 0 to 70% were used, excellent design effects were obtained.

(Effects of the Invention) As explained above, the colored veneer laminate according to the present invention uses an ultra-thin or thinly decorated veneer having a transparency within a certain range as a coloring material pasted on a base material. By creating a laminated structure in which the surface of the veneer is adhered with a transparent adhesive and the surface of the veneer is covered with a layer of transparent paint, the color of the coloring material and the grain pattern of the veneer are clearly overlapped and reflected, and the veneer is even more beautiful. The effect is that the fine grain of the wood is faithfully expressed.

In particular, by using colored papers or colored non-woven fabrics in shades of gray, red, orange, yellow, or blue as the base coloring material, colored products with shades that are completely different from wood tones can be used. However, the original grain of natural wood is faithfully reflected on the surface of the product, resulting in a new product that does not lose any of its pattern's excellence and clarity, making it a product that fully meets the tastes of recent consumers. Can be provided.

Moreover, the laminate product of the present invention does not suffer from color unevenness or gloss unevenness due to colorant seeping onto the surface, which is the case with conventional products. Also, if plywood is used as the base material,
The colored material between the veneer and the plywood acts as a buffer, and the effect is that the ultra-thin decorative veneer, which is naturally prone to breaking over time, is less likely to crack or break.

[Brief explanation of drawings]

FIG. 1 is an enlarged cross-sectional view showing a colored veneer laminate according to an embodiment of the present invention (magnification: approximately 25 times). In the figure, 1... Ultra-thin decorative veneer 4... Colored paper 2... Base material 5... Transparent adhesive layer 3... Adhesive layer
6...Transparent paint layer (2 others) Diagram 1

Claims (1)

[Claims] Transparency t calculated from the following formula (1) is 10 to 70%
An ultra-thin or thin decorative veneer is pasted via a transparent adhesive onto colored paper, colored nonwoven fabric, or colored resin film that is adhered to a base material with an adhesive, and then the ultra-thin or thin decorative veneer A colored veneer laminate product characterized by having the surface of the board covered with a transparent paint layer. t=100-d(%) (1) [where d represents the opacity (%) measured by a test according to JISP-8138. ]