JPH0834097A - Resin overlay panel and production thereof - Google Patents

Abstract

PURPOSE:To provide a resin overlay panel consisting of constitution capable of producing the grain having a definite pattern, a definite color or an arbitrary pattern with good reproducibility from an aspect of industrial production by utilizing the grain of veneer of a natural wood material and constitution capable of producing main grains and color patterns from a small number of pattern resin films with good reproducibility. CONSTITUTION:An extremely thin film is formed on the surface of a natural wood base material 20 such as lauan veneer plywood and screen printing is performed using transparent sealing UV curable urethan paint by a silk screen having wood grain patterns to form a film on the vessels of straight grain of the part unnecessary for forming wood grain patterns of the base material and entire surface coating of color paint is further performed. Since the vessels of straight grain of the part having the film formed thereto are embedded as compared with other part, only the vessels of the straight grain to which wood grain patterns are formed are left and the lauan veneer plywood of straight grain is converted to a panel having required wood grain patterns.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can be produced with good reproducibility in industrial production by using a veneer made of natural wood and using its wood grain to form a wood grain having a certain pattern, color or any pattern. Relating to the resin film overlay board consisting of the configuration,
For details, use a rotary veneer such as a rubber tree, seal the perforation in a specific pattern, and transfer and laminate a transparent resin layer on which coloring and color patterns are printed. It is characterized by forming a wood grain other than that by the combination of patterns and improving the design of the wood grain of natural material.Furthermore, by using this method, many resin films with a small number of patterns can be used. The present invention relates to a resin overlay plate capable of producing wood grain and color pattern with good reproducibility, and further capable of preventing occurrence of wrinkles, blisters, and adhesion failure of resin film by preheating and low-temperature heat transfer during thermal transfer of a multilayer resin film, and a manufacturing method thereof. .

[0002]

2. Description of the Related Art For decorative plywood, veneer made of natural wood such as sliced veneer, sone veneer, and half-round veneer is used to make beautiful veneer, and veneered with veneer on the surface of plywood. Board overlay There is plywood. Also, as a resin overlay plywood in which synthetic resin film, impregnated paper, and resin laminate are pressed against the surface of the plywood, resin film overlay plywood coated with a resin film on which a pattern or the like is printed as necessary, plastic lamination and overlay at the same time. Do the resin sheet overlay plywood using colored paper or patterned paper, paper resin beforehand like melamine resin decorative board,
There is a resin plate overlay plywood in which a resin plate made by impregnating a cloth is attached to the plywood. In addition, there are various overlay plywoods on which pattern paper, cloth, or hardboard is overlaid.

Further, there is a coated plywood which is transparently coated so as to make the best use of the grain of natural wood, or which is opaquely coated to obtain a desired color. In addition, since veneer boards that make use of beautiful wood grain are difficult to obtain and expensive, the surface of an inexpensive material is sealed and undercoated, and the wood grain or the required pattern is transferred onto it by delicate printing to finish it. Direct printed plywood is produced and used.

In recent years, not only the above-mentioned plywood but also the above-mentioned base material for overlaying the above-mentioned synthetic resin film, impregnated paper, resin laminated plate, etc., paper board, fiberboard obtained by solidifying resin such as vegetable fiber or wood waste, and particles. Board, MD
Various materials such as F, wood cement boards, rubber materials, materials made of inorganic materials, metals, and laminates thereof have been used.

[0005]

[Problems to be Solved by the Invention] In the case of a veneer laminated veneer overlay plywood, the pattern is different because it is a natural material, and the ground color is different, so a natural wood decorative plywood with the same pattern and tone is industrially produced. When mass production is attempted in a mass production, the production cost is reduced due to the veneer yield for matching the veneer pattern, and the industrial factors such as the correction for the color tone that hinder the mass productivity are overlapped. In addition, the demand for high-quality natural wood has long been high, and there is a shortage of supply. Therefore, conventionally, a method called direct printing method by rotary printing has been widely used for producing high-quality natural wood pattern veneer plywood using inexpensive natural wood.

[0006] This method is an industrial method in which rotary printing is carried out directly on the surface of a wood-based substrate or after undercoating with a roller having a desired print pattern etched, but since printing is performed with a liquid ink, the wood-based substrate is used. When printed directly on the material, the ink is absorbed by the wood fiber material, the pattern bleeds, and the printing becomes unclear. In order to prevent this, a method may be adopted in which a resin film is formed by applying it to a wood-based substrate such as paint, and then rotary printing is performed. In this case as well, bleeding can be eliminated, but the wood-based substrate If the material is a natural conduit or embossed, it is difficult to transfer ink to the recesses. In particular, if a pattern that resembles a natural material is to be formed by this method, it is necessary to perform synchronous printing of at least three colors of printed patterns. This is because the pattern is continuously formed on the surface of the substrate with a fixed pattern and a fixed color tone. This is even more difficult.

[0007] As a wood-based surface design method replacing such direct printing, the methods conventionally used include:
There is a method in which a wood grain pattern is printed in advance in a separate step on paper, a resin film, or the like, and the wood grain pattern is adhered to a wood-based material, or heat transfer such as hot stamping. Since this method has been developed for the purpose of supplying a large amount of wood-based surface designs in industrial production, it is possible to hide the printed pattern, which does not take into consideration the change in color tone of natural wood and natural conduits. I am trying to express the texture of wood by artificial embossing applied to the film.

Therefore, from a design point of view, the coloring effect of natural wood is completely different from the coloring effect of the concealed printed wood grain pattern. In other words, since natural wood is colored by colored transparent fiber aggregates, the degree of color development greatly changes depending on the angle of light entering the surface of the natural wood, but the concealed printed pattern has excellent concealment ability. Since the pattern is made up of different pigments, the degree to which the color tone changes due to changes in the angle of entry of light is less than in natural wood,
The drawback is that you cannot wipe the artificial wood texture. Also, from the viewpoint of industrial production, the color tone, pattern, and embossing are determined by the printing film, so the tastes of consumers are diversifying today, and we will industrially perform high-mix low-volume production in accordance with such tastes. You need to make too many print films.

In view of the problems of the above-mentioned various methods, as a method for providing a better wood-based surface design in industrial production, a veneer plywood or a high-grade veneer product which has not been suited to the taste of a consumer has been pasted. There is no annual ring that has been used for such things as it has no design, natural wood that can not be made into decorative plywood as it is, and using its wood grain, it becomes a certain pattern, color, or any pattern of wood grain, If it can be produced with good reproducibility in industrial production, it will be possible to produce a decorative plywood that meets today's diversified consumer preferences.

Further, in the case of resin film overlay plywood, a large number of wood patterns can be obtained with a small number of patterns of resin film.
If it is possible to produce a product with a color pattern that has the same reproducibility as the coloring effect of natural wood, it is possible to produce more natural colors that meet the tastes of customers without having to stock a large number of resin film patterns as before. This makes it possible to industrially produce a decorative plywood having an action with good reproducibility.

Further, as a kind of resin film overlay plywood, there is a method called hot stamping method in which a multi-layer resin film having a design property is transferred and adhered via hot melt. In this method, the thickness is about 10 μm, which is extremely high. Although it is a thin multi-layer resin film, it is heat-bonded to a natural wood base material via hot melt, so it can be stably adhered to a natural wood base material that does not have uniform physical or chemical properties on the base material surface. In order to achieve this, hot melt with sufficient adhesive strength must be adhered at a temperature as uniform as possible and at a low temperature that does not reduce the strength of the base material by degrading the cellulose, which is the main structure of the natural wood base material, to lower molecular weight. There was a problem to be solved. However, since the conventional hot stamping method was mainly applied to the surface of molded products and metal products, the surface conditions were uniform, and the temperature control of the heat welding device was correspondingly rough, so It has been difficult to process a natural wood base material stably and continuously. Further, as described above, the hot stamp method in which the resin film is adhered via hot melt has a problem that the resin film is peeled off due to deterioration of adhesive strength due to secular change of hot melt.

[0012] In view of the problems of such veneered plywood such as veneer overlay plywood and resin film overlay plywood, the present invention uses natural wood veneer and utilizes its wood grain to obtain a certain pattern, color, or arbitrary The aim is to provide a resin overlay plate that has a structure that can be produced with good reproducibility in industrial production as a pattern grain. In addition, a large number of grain patterns and color patterns can be reproducibly produced with a small number of resin film patterns. For the purpose of providing a resin overlay plate having a constitution that can be formed, particularly when thermally transferring a multilayer resin film,
It is an object of the present invention to provide a method for manufacturing a resin overlay plate that can be transferred in a simple process and ensures adhesive strength.

[0013]

Means for Solving the Problems The inventors of the present invention utilize a natural wood veneer, for example, a rotary veneer such as a rubber tree or a mangashiro perforated veneer to utilize the wood grain to obtain a certain pattern, Without any pattern of color, and in the same way as the coloring effect of the colored transparent fiber layer of natural wood,
As a result of various studies on resin film overlay boards for the purpose of producing reproducibly in industrial production, as a result, we performed resin filling with a specific pattern on the perforations of the veneer or veneer, applied a colored undercoat and then applied the color. A transparent resin layer printed with a pattern is transferred and laminated, or a transparent resin layer with a colored and colored pattern is transferred and laminated, and by combining the base material pattern and the transparent colored pattern of the transfer sheet, the natural wood grain and It was found that other grain, for example, grain, can be formed on the plank while keeping the coloring effect.

Further, as a result of further study on the constitution of the transparent resin layer, the above-mentioned grain change is obtained by sequentially laminating the colored undercoat transparent resin layer, the colored patterned transparent resin layer and the colored overcoat transparent resin layer. In addition, for example, it becomes possible to significantly improve the design of the natural wood grain while maintaining the texture of the natural wood, by changing the ordinary mahogany wood grain to the one having the most ideal wood grain as mahogany. Based on this finding, the present invention has been completed.

Furthermore, by using this method of sequentially laminating transparent resin layers, a large number of grain patterns and color patterns can be produced with good reproducibility by combining resin films having a small number of patterns. At the time of heat transfer of the hot stamp film, by devising a transfer roll and performing constant low temperature heat transfer by preheating of the base material, it is possible to obtain a constant adhesive strength while preventing weakening of the wood base material surface due to heat, , The coloring and patterning transparent resin layer is compatible with the solvent, and the heat-adhesive acrylic polymer-based resin or cellulose-derivative-based resin is mainly formed on the wood base material to form the transparent resin layer or each transparent resin. By mixing solvent between resin layers, coloring and patterning resin anchor effect, for example, surface protection resin layer is worn out. Is also fixed to the substrate without coloration and pattern with peels as was peeled off, as if to findings that fixing as natural material itself, thereby completing the present invention.

That is, according to the present invention, in addition to a veneer overlay plywood obtained by sticking a veneer to a plywood or particle board, a colored undercoat transparent resin layer is formed on a base material whose surface is natural wood, such as a natural wood board itself. It features a resin overlay plate in which a transparent resin layer with a colored pattern and a transparent resin layer with a colored topcoat are sequentially laminated, and in particular, the coloring and patterning are made of a resin such as an acrylic polymer or cellulose derivative that is compatible with a solvent, It is characterized in that a solvent is mixed between the resin layers or the respective resin layers to remarkably improve the adhesion strength for coloring and patterning.

Further, the resin overlay plate of the present invention is
In the above structure, a two-layer film in which a colored undercoat transparent resin layer and a colored resin with a colored handle are transfer films and are preliminarily laminated, or a three-layer film in which each transparent resin layer is a transfer film and preliminarily laminated. It is characterized by being composed of.

The present invention also provides a resin overlay plate in which a colored undercoat transparent resin layer, a colored patterned transparent resin layer, and a colored overcoat transparent resin layer are sequentially laminated on a substrate having a natural wood surface through an adhesive. In the production, when the transfer film is thermally transferred onto the base material, the surface temperature of the base material is constantly heated to 60 to 70 ° C., and the transfer temperature is transferred at a constant temperature of 160 ° C. or lower. Is configured by winding a rubber layer having a thickness of 15 mm or less around a metal roller with a built-in heater, and an external heating heater for heating the rubber layer is arranged on the non-contact surface side with the base material, and the transfer is performed. Depending on the temperature drop of the rubber layer after that, control the internal and external heaters,
Also, by increasing the roller diameter to increase the transfer speed and expanding the heat capacity of the roller to further reduce the temperature drop after transfer, it is possible to raise the temperature to a predetermined temperature after one rotation and perform continuous heat transfer. And a method for manufacturing a resin overlay plate.

[0019]

The details and operation of the resin overlay plate and the method of manufacturing the same according to the present invention will be described below. In the present invention, if the surface of the target material is natural water, not only natural wood boards, but also sliced veneers, sawn veneers, half-round veneers, rotary veneers, etc. on the surface of plywood. There is a laminated veneer plywood, and the veneer is not only a plywood but also a paperboard, a fiberboard made of resin such as vegetable fiber or wood chips, particle board, MD.
Various materials such as F, a wood cement board, a material made of an inorganic material such as a rubber material and ceramics, a metal, or a laminated body of these materials can be adopted.

In the resin overlay board according to the present invention, sealing is performed in a specific pattern on the perforations of the surface veneer, and a transparent resin layer on which coloring and a color pattern are printed is transferred and laminated, and the base material pattern and the transfer sheet pattern are formed. By combining the above, it is possible to form wood grain other than that, for example, grain, while making the most of the coloring effect of the natural material.In addition, a colored undercoat transparent resin layer, a colored patterned transparent resin layer, a colored topcoat transparent By adopting a structure in which the resin layers are sequentially laminated, it is possible to remarkably improve the design of the grain of the natural material while making the most of the coloring effect of the natural material.

That is, according to the present invention, the material appearance and the ground color and pattern of the natural wood board on the surface are used as they are or a part thereof, and the resin to be laminated thereon is set according to the ground color and pattern of the surface material. The resin to be laminated is characterized by significantly improving the design of the wood grain of the natural material while making the most of the coloring effect of the natural material when viewed from any direction, by stacking with the specific coloring and / or color tone. A transparent resin material such as a transparent film, a transparent adhesive, and a colored transparent paint can be appropriately selected for the layer, and the transparent film is an acrylic resin film, a vinyl chloride resin film, a polypropylene resin film, or a mold release treatment. The base film has a resin coating formed of acrylic polymer, vinyl polymer, cellulose derivative, epoxy resin, etc. The film of this transparent film of acrylic or vinyl chloride is preferred. Examples of transparent adhesives include solvent-based polyurethane adhesives, moisture-curable polyurethane adhesives, acrylic adhesives, and vinyl acetate adhesives. Colored transparent paints include polyurethane paints, UV-curable epoxy-based paints, polyester-based paints, acrylic-based paints, and aminoalkyd-based paints.

In particular, as the film-forming resin which can be dissolved in a solvent, a resin film having a thickness of about 2 to 3 μm formed of acrylic polymer, vinyl polymer, polyethylene wax, epoxy resin, cellulose derivative or the like is preferable. As the above-mentioned solvent, all the solvents conventionally used for paints can be used.

As a specific example of laminating, for example, in the case of laminating one layer at a time, after a colored undercoat resin layer is formed into a resin film in advance on the surface of natural wood, a transparent adhesive mixed with a predetermined solvent is applied, Adhesion or low temperature adhesion or low temperature heat transfer of a hot melt adhesive applied on the resin film side in advance. Further, the colored undercoat transparent resin layer is formed by applying a liquid such as ink or paint. After this,
A transparent film on which a pattern is preliminarily applied by a printing method such as gravure printing is bonded with a transparent adhesive like the above-described colored undercoat transparent resin layer formed into a resin film, or low-temperature adhesion by hot melt or low-temperature heat transfer. And 3
For the colored top coat transparent resin layer of the second layer, a resin layer is formed by adhesion of a resin film or application of a liquid resin like a colored undercoat transparent resin layer.

Since the colored undercoating transparent resin layer constitutes a pattern by the veneer wood pattern colored by this method and the transparent colored pattern applied on the upper surface thereof, when the veneer wood is very clear Since it is necessary to weaken the grain of the veneer, it is preferable to configure the veneer with a color close to the fabric color of the veneer and slightly weaken the original grain of the veneer.

Further, low-temperature heat-bonding or low-temperature heat transfer is performed as a two-layer film in which a transparent resin layer with a colored pattern and a transparent resin layer with a colored topcoat, or a transparent resin layer with a colored undercoat and a transparent resin layer with a colored pattern are preliminarily laminated. You can also Furthermore, a colored undercoat transparent resin layer, a colored resin layer with a colored pattern, and a colored topcoat transparent resin layer may be formed as a transparent film into a three-layer film that has been preliminarily laminated, and low-temperature heat bonding and low-temperature heat transfer may be performed on the surface of the substrate. it can. In this case, the adhesive to the base material may be provided on the laminate film side, or the adhesive may be applied to the base material side. The above-mentioned two-layer film and three-layer film have basically the same laminated structure.
By performing pattern printing, two layers or three layers of transparent films are laminated and laminated in this order from the adherend side to the adhesive layer, the colored or patterned printing layer, and the transparent film. If it becomes a predetermined 2 layers or 3 layers,
The laminating order at the time of laminating may be arbitrary.

As a specific example of the laminated film, for example, in the case of a single color such as a colored undercoating transparent resin film or a colored overcoating transparent resin film, a resin film formed of a resin in which a predetermined coloring pigment is kneaded is used and colored. When laminating an undercoating transparent resin film and a colored patterning transparent resin film, a colored patterning resin layer is formed on the surface of the colored undercoating transparent resin film, which is not the adhered side, with a coloring pigment, an acrylic polymer, a vinyl copolymer, or a cellulose derivative resin. Is directly printed by gravure printing to form a resin layer, or a base material is subjected to a mold release treatment, and then a transfer sheet patterned with the above resin is subjected to thermal transfer to a colored undercoat transparent resin film.

The adhered side of the colored undercoating transparent resin film is arbitrarily determined depending on the method of adhering this resin film to the natural wood substrate, whether the adhesive agent is applied to the film side in advance or the substrate side is applied. . Further, when the colored patterned transparent resin film and the colored overcoat transparent resin film are laminated, the stacking order is different, but the basic configuration is the same. On this occasion,
Examples of the colored undercoat or overcoat transparent resin film to be applied include vinyl chloride resin, acrylic resin film, and colored undercoat include vinyl acetate film. The three-layer laminated structure is basically formed by the same laminating method as that of the two-layer structure.

In the present invention, coloring and patterning are carried out by mixing 20% or less of a pigment into a resin such as an acrylic polymer, a vinyl copolymer or a cellulose derivative, which is compatible with a solvent, and utilizing this compatibility, coloring and patterning are carried out. Although the transparent resin layer strengthens the patterning on the natural wood base material more specifically, as a specific example thereof, in the case where the colored undercoating transparent resin layer and the colored patterning transparent resin layer and the colored topcoating transparent resin layer are sequentially laminated, The colored undercoating transparent resin layer and the colored topcoating transparent resin layer were made of urethane paint, UV-curable polyester, UV-curable epoxy, UV-curable acrylic or other paint, and the colored patterned transparent resin layer was formed of the acrylic polymer or the like. By stacking with a thermal transfer sheet, the color tone and pattern can be firmly fixed to the natural wood substrate.

Subsequently, a method of firmly fixing the color tone and pattern on the natural wood substrate is as follows. A two-layer film laminated on a colored overcoat transparent resin film by a thermal transfer sheet formed of the acrylic polymer or the like is used as a polyurethane transparent adhesive. Adhesion to a natural wood substrate by coating. At this time, the transparent resin layer with a colored pattern on the adhered side of the laminate sheet is firmly adhered with a polyurethane adhesive. When it is used by being laminated with a colored undercoat resin film by coloring with a thermal transfer sheet formed of the acrylic polymer or the like, there is a laminated structure with a vinyl acetate resin film. In this case, a vinyl acetate resin film and a heat transfer film are preliminarily semi-dissolved and laminated at a low temperature to form a film, and the laminated film is adhered to a natural wood substrate by heat melting the vinyl acetate film. Also in the case of a three-layer laminate structure, when the colored undercoat layer is a vinyl acetate resin film, it is adhered to the natural wood base material by heat melting in the same manner as above. Further, when the colored undercoat layer is a film of vinyl chloride resin or acrylic resin, when it is bonded with a mixed type adhesive of hot melt and moisture-curable polyurethane adhesive, it is strong against heat and aging and firmly adheres.

In the present invention, when the natural wood on the surface of the base material is open-bore with a clear grain, the open-bore is left or filled with a required pattern, and the filling is carried out. For the purpose of filling the parts other than the embossing (grains) necessary for a given grain pattern of the simple grain with a pattern formed by silk screen, etc. Any liquid resin may be used as long as it has appropriate thixotropy to form a constant film thickness, for example,
UV curable inks or paints, urethane filling feelers, vinyl acetate-based water-based emulsion adhesives, etc. can be used, and it is necessary that the color tone be a transparent color close to the fabric color. Further, as a method of locking the grain of the base material in synchronism with the grain pattern of the base material surface, silk screen printing of the tuned embossed pattern, or metal and resin of the tuned embossed pattern can be used for the seal printing. .

In the present invention, when the transfer film is heat-transferred onto the surface of the base material made of natural wood, it is prevented that the degree of polymerization of the natural wood cellulose is lowered and the intrinsic strength of the fiber is lowered, In addition, in order to prevent blisters, wrinkles, and peeling due to blown-out expanded air from the inside of the natural wood, the surface temperature of the base material is preheated to 60 to 75 ° C, and the transfer temperature is 160 ° C or less, preferably 130 ° C. ~
It is important to transfer at a constant temperature of 140 ° C. By preheating the base material, it is possible to prevent the expansion of air from the inside of the base material and the adhesion failure due to the temperature drop at the time of adhesion, and it is extremely effective for the open-bore base material.

Further, the present invention proposes the thermal transfer system shown in FIG. 1 for continuously adhering while maintaining a transfer temperature of 160 ° C. or less and a predetermined temperature. Transfer roller 1
Has a thickness of 1 on the metal roller 2 with a built-in heater 4.
The rubber layer 3 having a thickness of 5 mm or less is wound, and a heater 5 for external heating of the rubber layer 3 is provided on the non-contact surface side with the substrate 1, here, on the upper side, and the rubber after transfer is transferred. The internal and external heaters are controlled according to the decrease of the layer surface temperature.
That is, when the base material 10 previously heated to a predetermined temperature moves on a conveyor (not shown) and comes into contact with the transfer roller 1, the transfer sheet 11 is transferred to the base material 10 by the heat and pressure thereof, whereby the transfer roller 1 Temperature drops.
This temperature decrease Δt is detected by the sensor 6, and the sensor 6
By issuing a heating command to the control unit of the external heating heater 5, the heater 5 generates heat outside and the rubber layer 3 is heated to a set temperature.

In this thermal transfer system, the temperature of the rubber roller is not recovered during several roller rotations as in the conventional roller type hot stamp, but the temperature is recovered within one rotation. That is, the feature is that the temperature difference of Δt is achieved by heating the external heater 5 once. In order to achieve this, first, the transfer roller 1 incorporates the heater 4 on the outside as well as the heater 4 on the inside to heat the entire metal roller 2 having excellent thermal conductivity, and according to the increase of the transfer speed. By increasing the diameter of the transfer roller 1, the total amount of heat of the entire roller is increased, so that the ratio of the amount of heat lost during thermal transfer is reduced.

Further, the temperature decrease Δt sensed by the sensor 6
The input here is that the base material 10 is a constant temperature due to preheating,
Since it rushes into the transfer roller 1 and is considered to be almost constant, the power source of the external heating heater 5 is such that the heater generates a necessary amount of heat when it gives a necessary amount of heat to the temperature change of Δt. It is preferable to employ a calculus integral or proportional control method for controlling the amount of current or voltage. Therefore, this thermal transfer system can control the internal and external heaters 4 and 5 according to the decrease in the surface temperature of the rubber layer after the transfer, and can raise the temperature to a predetermined temperature by one rotation of the transfer roller 1. Thus, the base material 10 can be thermally transferred continuously.

[0035]

【Example】

Example 1 First, when selecting a natural wood base material, a natural wood base material is selected according to the purpose of patterning. The depth of the conduit was adjusted according to the film thickness formed by the colored undercoat, using a natural wood such as In addition, when patterning like a beech or a cherry tree, these natural trees do not require selection of the tree species of the natural wood base material because the conduits are shallow and the thickness of the colored undercoat can be adjusted. It was The laminated structure on the natural wood substrate is 1) a colored undercoat transparent resin layer, 2) a colored patterned transparent resin layer, and 3) a colored topcoat transparent resin layer. The following method was adopted as the forming method.

Step 1) a) Coloring of a fabric with a color pigment and a solvent diluent b) Urethane coating for solidifying the base material and fixing of natural wood c) Urethane coating, UV-curable coating for closed and open bore films Thickness formation d) Polishing of coating film to enhance the adhesive effect of the transparent resin layer with a colored pattern Step 2) a) Solidification of the base material with urethane paint and varnishing of natural wood b) Coloring with a mixed color paint of a color pigment and urethane paint c ) Urethane paints, UV-curable paints to form the required film thickness for closed and open bores d) Polishing of coating film to enhance adhesion and hardening of transparent resin layer with colored pattern

In any case, in order not to strengthen the wood grain of the natural wood base material, the colorant is appropriately mixed with white to weaken the wood grain, and a color scheme close to the wood grain color of the natural wood base material is adopted. did. Further, these 1) colored undercoat transparent resin layer, 2)
Each of the sheets of the transparent resin layer with a colored pattern was formed of a resin composition compatible with an organic solvent and had thermal adhesiveness.

In order to form the third colored transparent resin layer on the surface where the transparent layer with the colored pattern is formed by the above-mentioned process, the transparent layer with the colored pattern is slightly dissolved, and the colored undercoat layer as the lower layer is formed. A colored transparent resin coating material (urethane coating material, UV curable coating material) containing a solvent sufficient for casting on the transparent resin layer is applied to form a predetermined film thickness. At this time, the colored transparent resin coating containing the solvent infiltrates the transparent layer with a colored pattern and firmly adheres to the transparent resin layer with a colored pattern and firmly adheres to the transparent resin layer with a colored pattern, resulting in stronger adhesion physical properties than conventional film adhesion. I was able to get

Usually, the patterning of the transparent resin layer with a colored pattern is carried out by the gravure printing method, and it is generally understood that the printing is a collection of colored points. It was confirmed that due to the dissolution action of the solvent of the paint, the clusters of these points bleed and combine, resulting in a more natural appearance. In addition, since the transparent layer is stacked as a whole, light enters the lowermost natural wood base material, resulting in a more natural color development than the conventional printing color.

Example 2 In Example 1, the colored undercoat transparent resin layer can be a thermal transfer system with the same thermal transfer structure as the colored pattern-attached transparent resin layer. In this case, the pattern is not attached to form a colored film. . In this laminated structure, since the colored undercoating transparent layer is formed by film transfer, unlike the case of landing with a liquid on the natural wood base material in Example 1, it is possible to prevent coloring unevenness due to uneven absorption of the colorant. The designability in coloring patterns was improved, and the effect of the colored topcoat directly adhering to the natural wood substrate was obtained. Specifically, a heat transfer colored undercoat film having a sheet structure similar to that of the heat transfer sheet structure of Example 1 and a film with a heat transfer colored pattern are laminated on a natural wood base material, and a colored top coat (urethane paint) , UV curable paint), and the two layers of films each have a casting effect due to the dissolution of the solvent. In addition, the coloring was such that the skin of the natural tree was appropriately visible, and hiding of the base material with a coloring agent was avoided.

On the colored undercoat resin layer thus formed, the transparent resin film with a colored pattern is transferred to the colored undercoat transparent resin layer by the continuous thermal transfer roller described above.
The following method was adopted as the method for forming this thermal transfer film. Thermal Transfer Sheet Structure 1 A base film, a glossy surface, and a film with a colored pattern are formed in this order. P film or release-treated PET film, paper, etc. can be used, acrylic polymer, vinyl copolymer, cellulose derivative, etc. can be used to form a glossy surface. Acrylic polymer, cellulose derivative, vinyl copolymer, polyethylene wax, etc. were adopted. Thermal transfer sheet structure 2 A base film, a glossy surface, a colored patterned film, and a hot melt layer are formed in this order. The base film, the glossy surface, and the colored patterned film are the same as the above sheet structure 1, and the hot melt layer has Vinyl acetate hot melt, acrylic hot melt, etc. were adopted.

Example 3 In Example 2, the colored topcoat transparent resin layer is formed by the colored topcoat, and a resin film made of acrylic, hard vinyl chloride, polypropylene or the like is colored and bonded with a solvent-based polyurethane adhesive. It was adopted. That is, in step 1, a heat transfer colored undercoat film is heat-transferred onto a natural wood base material by a heat transfer roller, in the same manner as in step 2, the heat transfer colored patterned film is heat-transferred, and in step 3, various glue spreaders are applied to form a solvent type film. A polyurethane adhesive was laminated, and in step 4, a resin film such as hard vinyl chloride was laminated by adhesion by a roll press, a flat plate press or the like. At the time of press-bonding in step 4, the solvent of the solvent-based polyurethane adhesive slightly dissolves the heat transfer colored patterned and colored undercoat film, and the polyurethane adhesive adheres to the natural wood base material by sandwiching this layer, thereby making it hard. Films such as vinyl chloride resin that adhere firmly to the substrate,
In addition, the coloring effect of the gravure printing bleeds due to the dissolving action of the solvent, and the dots are bonded together, resulting in a more natural pattern.

Example 4 In Example 3, a method of forming a colored undercoat transparent resin layer with a colored undercoat paint was adopted instead of the method of thermal transfer of a thermal transfer colored undercoat film. That is, in step 1, a colored undercoat transparent paint layer is provided on a natural wood base material in the same manner as in Example 1, and in step 2, a transparent film layer with a thermal transfer colored pattern is laminated by thermal transfer with a thermal transfer roller, and step 3
Then, a solvent-type polyurethane adhesive was laminated by coating with various glue spreaders, and in step 4, a resin film such as hard vinyl chloride was laminated by adhesion by a roll press, a flat plate press or the like. At the time of press-bonding in step 4, the solvent of the solvent-based polyurethane adhesive slightly dissolves the film with the heat transfer coloring pattern, and the polyurethane adhesive adheres to the colored undercoat transparent resin layer so as to sandwich this layer, thereby forming the hard vinyl chloride. The resin film and the like such as a resin firmly adhered to the base material, and the coloring point of the gravure printing bleeds and bonds due to the dissolving action of the solvent, resulting in a more natural pattern.

Example 5 In Example 3, the layers were laminated one after another, but here, in each layer structure in Example 3, a resin film such as hard vinyl chloride and a film with a heat transfer coloring pattern were laminated by thermal transfer. Then, on the other hand, a method of firmly adhering this integrated film to a heat-transfer colored undercoat film thermally transferred to a natural wood substrate with a solvent-type polyurethane adhesive or the like was adopted. That is, first, a heat transfer colored undercoat film is fixed to a natural wood base material by heat transfer using a heat transfer roller, while a film with a heat transfer colored pattern is laminated on a resin film such as hard vinyl chloride by heat transfer using a heat transfer roller. Then, a solvent transfer type polyurethane adhesive is laminated on a heat transfer coloring undercoat film of a natural wood substrate by coating with various glue spreaders, and a heat transfer coloring pattern laminated on the resin film by adhesion by a roll press, a flat plate press or the like. Laminated film. In the same manner as in Example 3, when bonded by a roll press or the like, the solvent of the solvent-based polyurethane adhesive causes the film with the heat transfer colored pattern and the heat transfer colored undercoat film to be slightly dissolved by the solvent, so that the polyurethane adhesive can dissolve this layer. It provides a strong bond and adheres the entire film to the natural wood substrate. In addition, the colored pattern of the gravure printing bleeds and bonds due to the dissolving action of the solvent, resulting in a natural pattern.

Example 6 In Example 4, the respective layers were sequentially laminated, but here, in the respective layer constitutions in Example 3, a resin film such as hard vinyl chloride and a film with a heat transfer colored pattern were laminated by thermal transfer. On the other hand, a method was employed in which the integrated film was coated with a colored undercoating transparent paint on a natural wood base material, and the film was then abraded, followed by firmly adhering the film onto the natural wood base material with a solvent-type polyurethane adhesive or the like. That is, first, a colored undercoat transparent paint layer is provided on a natural wood substrate as in Example 1, and a film with a heat transfer colored pattern is separately laminated on a resin film such as hard vinyl chloride by heat transfer using a heat transfer roller. Then, a solvent-type polyurethane adhesive was laminated on the colored undercoat transparent paint layer of the natural wood substrate by coating with various glue spreaders, and laminated on the above resin film by adhesion by a roll press, a flat plate press or the like. Laminate a film with a heat transfer colored pattern. Similar to Example 4, when bonded by a roll press or the like, the solvent of the solvent-based polyurethane adhesive causes the film with the heat transfer colored pattern to be slightly dissolved by the solvent so that the polyurethane adhesive covers the entire film on the natural wood substrate. It adheres to the colored undercoat transparent resin layer of. Moreover, the coloring effect of the gravure printing bleeds due to the dissolving action of the solvent, and by combining, the pattern becomes more natural.

Example 7 In Example 5, the colored overcoat transparent resin film and the colored pattern-attached transparent resin film were previously adhered to each other, but here, the colored undercoat transparent resin film was also laminated beforehand. First, in step 1, a film with a heat transfer colored pattern is laminated on a resin film such as hard vinyl chloride by heat transfer with a heat transfer roll or the like, and in step 2, the surface of the film with a heat transfer colored pattern is thermally transferred with a heat transfer roll or the like to give a heat transfer colored undercoat. Laminate the films. A film having a three-layer structure is prepared in advance by steps 1 and 2, and then a moisture-curing polyurethane adhesive and a solvent-type polyurethane adhesive are applied to a natural wood base material by various glue spreaders in step 3, and roller pressing is performed in step 4. , Above at the membrane press
Glue the layered film. According to the above method, even a three-dimensional object having irregularities can be easily adhered by a membrane press due to the thermoplastic property of the resin film such as hard vinyl chloride.

Example 8 As a three-layer structure having the same structure as in Example 7, a base film was laminated with a colored overcoat transparent resin layer, a colored patterned transparent resin layer, a colored undercoat transparent resin layer, and a hot melt layer. This film was heat-transferred onto a plate-shaped or three-dimensionally shaped natural wood substrate with a heat transfer roller press, a membrane press or the like. This method is the same as the conventional hot stamping method, but since the transferred film is transparent, the natural wood substrate after this film transfer will be different from the original pattern, and the natural wood It has the effect that the natural grain of the wood and the coloring effect do not change.

Example 9 The following steps were adopted in order to form a grain pattern on a rotary veneer such as Lauan veneer plywood whose natural wood base material is a grain, or on a grained grain. Step 1) The natural wood base material (grain) was colored with a coloring pigment and thinner. Step 2) In order to form a very thin film on the surface of natural wood, the base was hardened with a transparent urethane paint. Step 3) A transparent UV curable or urethane paint for sealing is used, and a silk screen 21 having a grain pattern is used as shown in FIG. 2 to screen on the natural wood base material 20 which has completed Step 2. Printed. As shown in FIG.
As described above, the coating material passes through the silk screen 21 having the grain pattern only in the predetermined pattern portion, and the coating of the above-mentioned paint is applied to the perforated conduits in the portions not necessary for forming the grain pattern on the natural wood base material 20. Is formed. Step 4) A UV-curable coating material or a polyurethane coating material was applied to the entire surface of a natural wood base material on which a grain pattern was silk screen printed. By applying the paint to the entire surface of the natural wood base material 20 which is silk-screen printed by the step 4 and passes through the silk screen 21, the portion where the film is formed in the step 3 is more sharp than the other portions. Since the conduit is buried, only the grained grained grain line of the grain is left, and the lauan veneer plywood of grain grain is changed to a plate having the required grain pattern.

[0049]

INDUSTRIAL APPLICABILITY The present invention uses a rotary veneer such as a rubber tree or a mangashiro grained veneer to utilize the grain of the grain to perform resin filling in a specific pattern on the grain and apply a colored undercoat coating. After that, a transparent resin layer on which a color pattern is printed is transferred and laminated, or a transparent resin layer on which coloring and a color pattern are printed is transferred and laminated, and a natural material of The grain can be formed in the grain as in the example while maintaining the color development effect of the wood grain and the colored transparent fiber layer, and can be produced with good reproducibility in industrial production. Further, the present invention has the most ideal wood grain as a mahogany wood grain of a normal mahogany material by having a configuration in which a colored undercoating transparent resin layer, a colored resin with a patterned handle, and a colored topcoat transparent resin layer are sequentially laminated. To things,
It is possible to remarkably improve the design of the grain of the natural material while keeping the texture of the natural material. Furthermore, by using this method of sequentially laminating transparent resin layers, a large number of grain patterns and color patterns can be produced with good reproducibility by combining resin films with a small number of patterns, and further, a multilayer resin film type hot stamp film. In the thermal transfer of
By applying a constant low temperature thermal transfer by preheating the base material, while preventing the brittleness of the wood base material due to heat,
A constant adhesive strength is obtained. In addition, the coloring and patterning transparent resin layer is compatible with a solvent, and is formed mainly of a resin such as an acrylic polymer resin or a cellulose derivative resin that has thermal adhesiveness to a wood substrate, and the transparent resin layer or By mixing a solvent between each transparent resin layer, the anchoring effect of the coloring and patterning resin causes the coloring and patterning to be fixed on the base material without peeling off even if the surface protection resin layer is worn or peeled off. It has the effect of fixing like the material itself.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional explanatory view of a thermal transfer roller used in a thermal transfer system according to the present invention.

FIG. 2 is a perspective explanatory view of a silk screen and a natural wood base material showing a silk screen printing with a grain pattern according to the present invention.

[Explanation of symbols]

 1 Transfer Roller 2 Metal Roller 3 Rubber Layer 4,5 Heater 6 Sensor 10 Base Material 11 Transfer Sheet 20 Natural Wood Base Material 21 Silk Screen

Claims (30)

[Claims] 1. A resin overlay board comprising a base material having a natural wood surface, a colored undercoat transparent resin layer, a colored patterned transparent resin layer, and a colored topcoat transparent resin layer, which are sequentially laminated. 2. The resin overlay plate according to claim 1, wherein coloring and patterning, or only patterning is made of a solvent-compatible resin. 3. The resin overlay plate according to claim 2, wherein the coloring and patterning is made of a resin which can be adhered to a base material which is a natural wood through heat and pressure. 4. The resin overlay plate according to claim 2, wherein a solvent is mixed between the transparent resin layer or each resin layer. 5. The resin overlay plate according to claim 1, wherein at least the transparent resin layer with a colored pattern is a transparent film. 6. The resin overlay plate according to claim 1, wherein at least one colored transparent resin layer is a coating film. 7. The resin overlay board according to claim 1, wherein the colored undercoating transparent resin layer and the colored pattern-bearing transparent resin layer are transparent films and are two-layer films laminated in advance. 8. The resin overlay plate according to claim 1, wherein the transparent resin layer with a colored pattern and the transparent resin layer with a colored top coat are transparent films and are two-layer films laminated in advance. 9. The resin overlay board according to claim 1, wherein each transparent resin layer is a transparent film and is a three-layer film laminated in advance. 10. The resin overlay plate according to claim 7, wherein the coloring and patterning are made of a solvent-compatible resin. 11. A solvent is mixed in the adhesive of the laminated laminated transparent film.
0 resin overlay board. 12. The resin film overlay plate according to claim 1, wherein when the natural wood is open-bore with a clear grain, the open-bore is left or filled in a required pattern to prevent the open-bore. 13. The resin film overlay board according to claim 1, wherein the base material provided with a perforated plate is a veneer board. 14. The resin overlay plate according to claim 1, wherein the perforated plate is a rotary single plate. 15. A resin overlay characterized in that a colored undercoat transparent resin layer, a colored patterned transparent resin layer, and a colored overcoat transparent resin layer are sequentially laminated on a substrate having a surface of natural wood through an adhesive. Method of manufacturing a plate. 16. The heat transfer of a transfer film onto a base material, the surface temperature of the base material is constantly heated to 60 to 70 ° C., and the transfer temperature is transferred at a constant temperature of 160 ° C. or lower. Item 15. A method of manufacturing a resin overlay plate according to item 15. 17. The transfer roller has a structure in which a rubber layer having a thickness of 15 mm or less is wound around a metal roller with a built-in heater, and external heating for heating the rubber layer is provided on the non-contact surface side with the base material. The heat capacity of the roller is expanded by arranging a heater, controlling the internal and external heaters according to the decrease of the surface temperature of the rubber layer after transfer, and increasing the roller diameter in response to the increase of transfer speed. The method for producing a resin overlay plate according to claim 16, wherein the temperature is raised to a predetermined temperature after one rotation by reducing the temperature decrease after the transfer and the heat transfer is continuously performed under a constant temperature condition. 18. The method for producing a resin overlay plate according to claim 15, wherein the coloring and the patterning are made of a resin compatible with a solvent. 19. The method for producing a resin overlay plate according to claim 16, wherein a solvent is mixed in the transparent resin layer or the adhesive. 20. The method for producing a resin overlay plate according to claim 15, wherein a transparent resin layer with a colored pattern made of a transfer film is laminated. 21. The method for producing a resin overlay plate according to claim 15, wherein at least one colored transparent resin layer is formed by painting. 22. A two-layer film obtained by forming a colored undercoat transparent resin layer and a transparent resin layer with a colored pattern on a transfer film and laminating the two layers in advance.
5. The method for producing a resin overlay plate according to 5. 23. A two-layer film obtained by forming a transparent resin layer with a colored pattern and a transparent resin layer with a colored top coat on a transfer film and laminating the two layers in advance.
5. The method for producing a resin overlay plate according to 5. 24. The method for producing a resin overlay plate according to claim 15, wherein each transparent resin layer is formed of a transfer film and a three-layer film laminated in advance is laminated. 25. The method according to claim 22, wherein coloring and patterning are made of a resin compatible with a solvent.
The resin overlay plate according to claim 3 or claim 24. 26. The resin overlay plate according to claim 25, wherein a solvent is mixed in the adhesive agent of the laminated laminated film. 27. When thermally transferring a transfer film onto a base material, the surface temperature of the base material is constantly heated to 60 to 75 ° C., and the transfer temperature is transferred at a constant temperature of 160 ° C. or lower. Claim 22, Claim 23, Claim 24, Claim 2
The method for producing a resin overlay plate according to claim 5 or 26. 28. The transfer roller has a structure in which a rubber layer having a thickness of 15 mm or less is wound around a metal roller with a built-in heater, and external heating for heating the rubber layer is provided on the non-contact surface side with the base material. By arranging a heater, controlling the internal and external heaters according to the decrease in the rubber layer surface temperature after transfer, and increasing the roller diameter in response to the increase in transfer speed,
The resin overlay according to claim 15, wherein the heat capacity of the roller is expanded to further reduce the temperature drop after transfer, thereby raising the temperature to a predetermined temperature after one rotation and continuously performing heat transfer under a constant temperature condition. Method of manufacturing a plate. 29. The method for producing a resin overlay plate according to claim 14, wherein when the natural wood is open-bore with clear grain, the filling is performed by leaving or filling the open-bore with a required pattern. 30. The method for producing a resin overlay plate according to claim 29, wherein silk screen printing of the synchronous embossed pattern or sealing printing for leaving or filling the open bore in a required pattern by the roller of the synchronous embossed pattern is performed.