JP3951533B2 - Veneer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a decorative sheet and a decorative plate used for interiors of buildings such as houses and vehicles, and more particularly to a decorative sheet and a decorative plate that can be suitably used for joinery, wall surfaces, ceilings, and the like.
[0002]
[Prior art]
Wooden materials such as solid board and veneer plywood that have been used in the field of building materials are natural materials, so they lack various resistances such as light resistance, contamination resistance, wear resistance, and scratch resistance. The resistance has been compensated for by painting with a synthetic resin paint.
[0003]
However, the painting work, for example, sanding sealer, polishing, undercoating, intermediate coating, finish coating, etc., has many man-hours and is expensive, and there are also problems in occupational health due to the volatilization of the solvent contained in the paint.
[0004]
In addition, when a paint containing a solvent is exposed to a high temperature in an attempt to dry at a high speed, defects such as warpage and cracking are likely to occur, and therefore, drying at a relatively low temperature for a long time is required. Accordingly, the line length of the painting equipment is inevitably long, and it must be a large equipment requiring a large installation area, and the production efficiency is low because the speed does not increase.
[0005]
Also, in terms of the quality of the products produced, there are differences in the texture of the wood between individual woods, and between the spring wood and autumn woods within a single wood. Because the resin soaking conditions are different, the finished state such as coating film thickness and surface gloss tends to vary, and it is difficult to stably supply products of uniform quality.
[0006]
On the other hand, a technique for attaching a plastic film printed with a wood grain pattern to the surface of a wood-based substrate instead of painting has also been widely put into practical use. "" May appear, and there is no natural feeling or real feeling as a wooden base material, and it is inferior in design.
[0007]
[Problems to be solved by the invention]
The present invention has been made in order to solve the above-described problems in the prior art, and is made light-resistant while taking advantage of the design feeling and texture of the wood base material such as solid board or veneer plywood. In order to provide various resistances such as resistance, stain resistance, abrasion resistance, scratch resistance, etc., to easily and efficiently produce a decorative board without using complicated coating methods with low productivity. It is an object of the present invention to provide a decorative sheet and a decorative plate manufactured using the decorative sheet and suitable for the above purpose.
[0008]
[Means for Solving the Problems]
As described above, the decorative board of the present invention is provided with various resistances such as light resistance, stain resistance, abrasion resistance, and scratch resistance by attaching a decorative sheet to a wooden substrate such as a solid board or a veneer plywood. A decorative board, wherein the decorative sheet is transparent or semi-transparent so that a transparent or translucent base paper is subjected to resin coating, and after the resin coating, the design feeling or texture of the wood base material is utilized. A transparent wood grain pattern is printed, and a matte tube pattern is printed so as to make use of the design and texture of the wood base material, and the transparent base material is passed through a transparent or translucent adhesive. It is characterized by being bonded to the surface of a woody base material.
[0009]
Further, the decorative board of the present invention is a decorative board provided with various resistances such as light resistance, stain resistance, abrasion resistance, and scratch resistance by attaching a decorative sheet to a wooden substrate such as a solid board or a veneer plywood. And the decorative sheet is printed on a transparent or translucent base paper with a transparent or translucent wood grain pattern so as to make use of the design or texture of the wood base material. In order to make use of the texture and texture of the wood grain, the matte-shaped conduit pattern is printed and then resin coating is applied to the surface of the wooden substrate via a transparent or translucent adhesive. It is characterized by being combined.
[0011]
The decorative board of the present invention is characterized in that the resin used for the resin coating is made of a silicone resin or a silicone compound is added to improve the stain resistance.
[0012]
Functionality is improved by adding a functional material such as an antibacterial agent, a volatile organic substance scavenger and / or a moisture absorbing / releasing agent to the resin used for the resin coating.
[0013]
A dye, a coloring pigment, a pearl pigment, a fluorescent pigment and / or a phosphorescent pigment are added to the resin used for the resin coating to improve the design.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
The decorative sheet of the present invention uses a transparent or translucent base paper such as thin paper so that the design or texture of the grain of the surface of the woody base material to be applied can be seen through, and is light-proof. In order to impart various physical properties such as water resistance, stain resistance, abrasion resistance, scratch resistance, etc., a resin layer is formed on the surface by applying a resin that is transparent or translucent and excellent in various physical properties. More preferably, a part of the coated resin is impregnated and impregnated into the whole base paper or a part of the surface layer to enhance the inter-sheet strength of the base paper, improve the transparency of the base paper, and This has the effect of further improving the design properties utilizing the design and texture of the grain of the surface.
[0017]
As the base paper used in the decorative sheet of the present invention, does the base paper itself have a certain degree of transparency so that the design feeling or texture of the grain of the surface of the woody base material to be applied can be seen through? Or, even if the base paper itself is originally opaque, it may be a paper-based material having a property of becoming transparent or translucent by a subsequent resin coating process.
[0018]
Specifically, thin paper with a basis weight of approximately 50 g / m ² or less, or paper that has been made transparent by subjecting it to raw material pulp or paper after papermaking, excessive treatment with chemicals, beating, pinching, etc. Can be used.
[0019]
More specifically, for example, so-called building paper such as thin paper for building materials, resin-mixed paper, resin-impregnated paper, inter-paper reinforced paper, overlay paper for decorative plates, and other non-building paper such as glassine Paper, tracing paper, oil paper, wax paper, Indian paper, parchment paper, tea bag paper, etc., or paper mixed with non-wood based natural fiber, recycled fiber and / or synthetic fiber, etc. Nonwoven fabrics made of various fibers may be used.
[0020]
In general, the thinner the base paper, the better the transparency. However, the base paper is also used in terms of the strength required for the base paper in processing such as printing, coating, and bonding, and in handling the raw fabric or product. However, if the resin is impregnated to the back of the base paper by resin coating, it is difficult to use a general-purpose adhesive for wood when bonding to a wooden substrate. Therefore, it is also restricted from the standpoint of preventing the resin from coming through and the like, and it is generally preferable to use a resin having a basis weight of 23 g / m ² or more.
[0021]
If the resin is not impregnated and impregnated into the base paper or only part of the surface side is impregnated, the strength between the papers on the back side of the base paper may be insufficient, in such a case, If the inter-sheet reinforcing agent is applied to the back surface of the base paper before or after the resin coating, the inter-sheet strength of the entire base paper can be sufficiently enhanced.
[0022]
The resin used for the resin coating is any resin as long as it can impart various resistances such as light resistance, stain resistance, abrasion resistance, and scratch resistance required for the target decorative board. In general, however, a thermosetting resin or ionizing radiation curable resin (such as an ultraviolet curable resin or an electron beam curable resin) excellent in hardness and internal cohesion may be used.
[0023]
Examples of thermosetting resins include melamine resins, urea resins, phenol resins, unsaturated polyester resins, diallyl phthalate resins, benzoguanamine resins, epoxy resins, urethane resins, alkyd resins, etc. As the functional resin, for example, an acrylate resin, a methacrylate resin, or the like can be used.
[0024]
The coating method is arbitrary, for example, a roll coating method, a gravure coating method, a knife coating method, a flow coating method, a fountain coating method, a comma coating method, a die coating method, a spray coating method, or a dip coating method.
[0025]
The amount of resin applied is basically determined according to the degree of various resistances required for the target decorative board, but since a part of the resin penetrates and impregnates into the base paper during coating, In order to form a uniform resin coating on the surface with a sufficient film thickness for various resistances, it is necessary to design it taking into account the resin absorptivity of the base paper, generally in the range of ^{2 to} 50 g / m ² . It is preferable that
[0026]
In addition, if the resin coating process is performed once, a part of the resin is absorbed by the base paper, so that uneven coating due to the difference in density due to the density difference depending on the location of the base paper occurs, The surface of the coating may be deformed due to absorption of the coating resin coating into the base paper, resulting in uneven gloss. In order to avoid the occurrence of such a phenomenon and form a resin film having a good surface state, it is effective to apply the resin in two or more times. The surface state can also be improved by applying a smoothing bar to the surface immediately after coating.
[0027]
As the resin used for the resin coating, a silicone resin or a fluorine resin may be used for the purpose of improving the stain resistance. Of course, it is desirable to use a curable type, for example, an addition type, a condensation type, a peroxide cross-linking type, an ionizing radiation curable type as a silicone resin, and an isocyanate curable type or an ionizing radiation curable type as a fluorinated resin. A mold or the like can be used.
[0028]
In addition to the above, by adding a silicone compound or fluorine compound to a general thermosetting resin or ionizing radiation curable resin other than the silicone resin or fluorine resin as described above, the stain resistance is also improved. It is possible to improve.
[0029]
As such silicone compounds and fluorine resins, for example, silicone oil and solvent-soluble low molecular weight polyvinylidene fluoride resins are used in a form dispersed in a thermosetting resin or ionizing radiation curable resin. For example, active hydrogen groups such as hydroxyl groups, amino groups, mercapto groups, polymerizable double bond groups such as vinyl groups or (meth) acryloyl groups, or reactive functional groups such as isocyanate groups or epoxy groups. When a reactive silicone compound or a reactive fluorine compound is used in the molecule, it reacts with the thermosetting resin or ionizing radiation curable resin to bond to the lower layer or to the surface. Bleed is suppressed, and it can withstand repeated wiping and maintain contamination resistance for a long time.
[0030]
In recent years, fluorinated resins and fluorinated compounds tend to be avoided from the problem of the generation of toxic gas (hydrogen fluoride) during fires and incineration. From this point of view, there is a concern about the generation of toxic substances. It is desirable to use a silicone-based resin or a silicone-based compound that does not contain any resin.
[0031]
For the purpose of improving light resistance, it is desirable to add an ultraviolet absorber and / or a light stabilizer to the resin used for resin coating. Examples of the ultraviolet absorber include benzophenone, benzotriazole, salicylic acid ester, cyanoacrylate, formamidine, oxanilide, and the like, and examples of the light stabilizer include hindered amine, nickel complex, and the like. It is most desirable to use both an absorber and a light stabilizer in combination.
[0032]
Similarly, from the viewpoint of light resistance, when an isocyanate curable urethane resin is used, aromatic isocyanates such as tolylene diisocyanate (TDI) are used because they have yellowing. In some cases, it is desirable to use an aliphatic type such as hexamethylene diisocyanate (HMDI) or an alicyclic type such as isophorone diisocyanate (IPDI). . Even if it is aromatic, xylylene diisocyanate (XDI) has little yellowing, and can be used depending on the color tone and application.
[0033]
If necessary, a lubricant such as alumina or silicon carbide can be added to the resin to be coated in order to improve the wear resistance and scratch resistance. The antifriction agent may be indefinite, but it is more effective to use particles with uniform particle size, so use spherical or polyhedral (crystal) particles that are easy to obtain particles with uniform particle size. It is desirable to do.
[0034]
In addition to the anti-friction agent, for example, a gloss adjusting agent such as silica or glass beads is added to adjust the gloss state of the surface, or a dye or dye is used for coloring to an appropriate color as long as transparency is not impaired. Add color pigments, add pearl pigments, fluorescent pigments or phosphorescent pigments to give pearl luster, fluorescence or phosphorescent properties, or add other special functions such as formaldehyde catchers Functional substances such as a volatile organic substance scavenger, an antibacterial agent, a deodorant, and a moisture absorbing / releasing agent can also be added.
[0035]
In addition, while making use of the design and texture of the wood grain on the surface of the wood-based substrate to be applied, the artificial wood grain pattern by printing etc. is overlaid to homogenize the natural grain texture to some extent. The decorative sheet of the present invention can be printed with a transparent or translucent wood grain pattern.
[0036]
For transparent or translucent wood grain printing, transparent or translucent printing inks using dyes or pigments with high transparency may be used, or printing inks with low transparency or substantially opaque are used. Even if it is used, if it is printed in a halftone dot pattern with many omissions, the transparency or translucency can be substantially maintained. The wood grain pattern can have a more realistic natural feeling by using a technique such as including a raised pattern corresponding to the autumn wood part.
[0037]
Moreover, the decorative sheet of the present invention is bonded on the surface of the wood base material to be pasted, not to mention when the conduit groove of natural wood is substantially absent. Therefore, it is desirable to print the conduit pattern on the decorative sheet of the present invention. The conduit pattern may be simply a color expression with dark ink, but if it is made matt by adding a matting agent etc., it will appear visually concave due to the difference in gloss with the surroundings. It is possible to give a high-class design effect similar to a real conduit groove in a woody base material.
[0038]
In addition to the above, as a technique for expressing the conduit groove, after applying a matte resin on the entire surface and then applying a high gloss resin other than the conduit groove, or after printing the conduit pattern with resin-absorbing ink Applying resin on the entire surface and absorbing the applied resin on the conduit handle, exposing the conduit handle, and using a liquid repellent ink due to the inclusion of a liquid repellent, etc. on the entire surface after printing the conduit handle Applying resin and repelling the resin in the conduit handle, exposing the conduit handle, printing the conduit handle with foaming ink, coating the resin on the entire surface, foaming the conduit handle, and foaming inside the foamed part by polishing etc. Any conventionally known technique can be applied, such as a technique of exposing the cell to gloss digestion.
[0039]
In order to prevent deformation and warpage due to moisture absorption and desorption of the wooden base material, a moisture permeation preventing resin layer can be provided on the back surface of the base paper. The resin layer may be a thermoplastic resin or a curable resin as long as it is a transparent or translucent resin excellent in moisture resistance, and the formation method thereof is, for example, a coating method, a melt extrusion lamination method, a dry resin method, or the like. A laminating method, a wet laminating method, a thermocompression bonding method, an ultrasonic fusion method, a high frequency bonding method, and the like are optional.
[0040]
The decorative sheet of the present invention described in detail above is bonded to the surface of a woody base material such as a solid material or a veneer plywood through an appropriate transparent or translucent adhesive to produce the decorative sheet of the present invention. Is done.
[0041]
The adhesive to be used for bonding the decorative sheet of the present invention to the woody base material is originally transparent or translucent, or is transparent or translucent after curing even though it is opaque during bonding The resin system and the adhesion mechanism are not limited at all.
[0042]
Specifically, the adhesive mechanism may be a solvent activated type, a reaction curable type, a heat sensitive type (hot melt type), a pressure sensitive type (adhesive), or a composite type of two or more of them (eg, reactive curable type hot melt adhesive). For example, vinyl acetate type, urea type, EVA type, fiber type, urethane type, acrylic type, epoxy type, polyester type, polyamide type, synthetic rubber type, cyanoacrylate type, silicone, etc. And the like.
[0043]
In addition, since transparency is required for the adhesive, it is not desirable to add a concealing pigment such as titanium dioxide, but within a range that does not impair the transparency, for example, organic or inorganic dyes or colored pigments, constitutions It is optional to add pigments, pearl pigments, fluorescent pigments, phosphorescent pigments and the like.
[0044]
Furthermore, it is also possible to physically give the expression of the conduit groove by applying mechanical embossing to the decorative board of the present invention in place of or in combination with the matte-shaped conduit pattern.
[0045]
【Example】
Examples of the present invention are shown below.
[0046]
Example 1
Two silicone-modified liquids comprising a composition of 100 parts by weight of an acrylic polyol main agent, 30 parts by weight of an isocyanate curing agent (HMDI) and 10 parts by weight of a reactive silicone additive on the surface of a paper-reinforced paper having a basis weight of 23 g / m ^2. A curable urethane resin was applied to a coating amount of 12 g / m ² after drying by a gravure coating method. The coating was performed in two heads, and a sufficient drying treatment was performed on the coating line so as not to cause blocking while leveling the surface using a smoothing bar. After resin coating, aging was performed for 3 days at a temperature of 60 ° C. to obtain a decorative sheet of the present invention.
[0047]
56 g / m ² (wet) of vinyl acetate adhesive without added titanium dioxide pigment is applied to the surface of a wooden substrate (solid board or veneer plywood), and after drying, the adhesive coating surface is coated with the above-mentioned The decorative sheet was laminated with the back surface (the surface opposite to the resin-coated surface) facing and bonded together with a decorative laminator to obtain the decorative plate of the present invention.
[0048]
Example 2
In Example 1 above, after resin coating on the inter-paper reinforced paper, before aging, using a transparent ink of an isocyanate curable two-component urethane resin system, the wood texture to be bonded later on the resin coated surface by gravure printing method A transparent wood pattern that does not feel uncomfortable with the wood pattern of the base material, and is further printed with a gravure printing method using an isocyanate-curing two-component urethane resin-based colored matte ink. A matte-like conduit pattern that does not feel uncomfortable with the wood grain pattern was formed by printing, and the decorative sheet and decorative plate of the present invention were obtained in the same manner as in Example 1 below.
[0049]
Example 3
In Example 1 above, before applying the resin to the inter-paper reinforced paper, a woody base material to be bonded later on the resin-coated surface by a gravure printing method using an isocyanate-curable two-component urethane resin-based transparent ink A transparent wood grain pattern that does not feel uncomfortable with the wood grain pattern is printed, and after resin coating, before aging, using an isocyanate-cured two-component urethane resin-based colored matte ink, A matte-shaped conduit pattern having no sense of incongruity with the wood pattern of the wood base material to be bonded was printed and the decorative sheet and decorative plate of the present invention were obtained in the same manner as in Example 1 below.
[0051]
Example 4
In each of Examples 1 to 3 above, 0.3% by weight of a benzotriazole-based UV absorber and 0.2% by weight of a hindered amine-based light stabilizer are further added to the resin for resin coating. The decorative sheet and decorative plate of the present invention with improved light resistance were obtained in the same manner as in Examples 1 to 3 .
[0052]
Example 5
In each of the above Examples 1 to 4 , 5% by weight of polyhedral alumina particles having an average particle diameter of 10 μm are further added to the resin applied by the second head, and the others are the Examples 1 to 4 described above. In the same manner as above, the decorative sheet and decorative plate of the present invention with improved wear resistance and scratch resistance were obtained.
[0053]
Example 6
In each of the above Examples 1 to 5 , 5% by weight of a pearl pigment (titanium oxide-coated mica particles) having an average particle size of 30 μm was further added to the resin for resin coating, and the others were the same as in Examples 1 to 5 above. In the same manner as in each example, the decorative sheet and decorative plate of the present invention were obtained that compensated for the shine on the surface of the woody base material.
[0054]
Example 7
In each of the above Examples 1 to 6 , 5% by weight of carbohydrazide as a formaldehyde scavenger is further added to the resin applied with the second head, and the others are the same as those of the above Examples 1 to 6 . In this way, the decorative sheet and decorative plate of the present invention to which a function of capturing formaldehyde, which is a volatile organic substance, was added were obtained.
[0055]
【The invention's effect】
Since the decorative sheet of the present invention is formed by applying a resin coating to a transparent or translucent base paper, it is bonded to a wooden base material such as a solid board or a veneer plywood, A decorative board imparted with various resistances such as light resistance, stain resistance, abrasion resistance, scratch resistance and the like can be produced while making use of the material feeling.
[0056]
Moreover, since this decorative sheet can be mass-produced with a certain quality on an industrial scale, the quality of the manufactured decorative board is also stabilized. In addition, the manufacturing process of the decorative plate requires a large-scale facility, a process that is complicated and low in productivity is not required, and is simple and simple with only a single process of attaching a decorative sheet to a wooden substrate. A decorative board can be manufactured with high productivity.
[0057]
In addition, by adding a transparent or translucent base paper layer to the resin coating film, the transparent or translucent layer laminated on the surface of the wood-based base material has a problem of drying of the paint or the paint in the conventional coating method. It is possible to increase the thickness to a thickness that was practically impossible due to the problem of embrittlement of the coating, and it is possible to easily manufacture a decorative board full of luxury with an excellent coating feeling.
[0058]
In other words, if it is only necessary to obtain a decorative panel with the same feeling of painting as before, the amount of resin applied can be greatly reduced compared to the conventional method, and the production cost can be reduced and productivity can be improved. It can also contribute to the suppression of environmental pollution.
[0059]
In addition, the color tone of the decorative board produced by coloring the resin, printing transparent or translucent wood grain patterns, conduit patterns, raised patterns, etc., and visual three-dimensional expression by making the conduit patterns matt. In addition to stabilization of the wood grain design, the design properties can be further improved.
[0060]
In addition, a silicone material is added to the resin to improve contamination resistance, an anti-friction agent is added to improve wear resistance and scratch resistance, and various other functional materials are added. It is easy to add any desired functionality.

Claims (5)

  A decorative board provided with various resistances such as light resistance, stain resistance, abrasion resistance and scratch resistance by laminating a decorative sheet on a wooden base material such as a solid board or a veneer plywood, wherein the decorative sheet comprises: Apply a resin coating to transparent or translucent base paper, and after applying the resin, print a transparent or translucent wood grain pattern so as to make use of the design feeling and texture of the wood base material. In order to make use of the design and texture of the wood grain of the base material, it is printed with a matte conduit pattern and pasted to the surface of the wooden base material via a transparent or translucent adhesive. A decorative board characterized by that.   A decorative board provided with various resistances such as light resistance, stain resistance, abrasion resistance and scratch resistance by laminating a decorative sheet on a wooden base material such as a solid board or a veneer plywood, wherein the decorative sheet comprises: A transparent or translucent wood grain pattern is printed on a transparent or translucent base paper so as to make use of the wood texture or texture of the wood base material. In order to make the best use of it, it is characterized in that it is formed by applying a resin coating after printing a matte-shaped conduit pattern and bonding it to the surface of the wood-based substrate through a transparent or translucent adhesive. Veneer. The decorative board according to any one of claims 1 and 2 , wherein a silicone resin is used as a resin used for the resin coating or a silicone compound is added to improve stain resistance. . A functional material such as an antibacterial agent, a volatile organic substance scavenger and / or a hygroscopic agent is added to the resin used for the resin coating to improve functionality. The decorative board according to any one of 3 above. According to any one of claims 1 to 4, characterized in that to improve the design of the dye to the resin used in the resin coating, a coloring pigment, by adding pearl pigments, fluorescent pigments and / or phosphorescent pigment Decorative board.