JPH11321195A - Wooden decorative material, and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an uneven pattern such as a grain duct tube groove sharper and deeper by embossing even when a decorative layer is imparted by a transfer for a wooden decorative material which is used for a door or the like. SOLUTION: For this wooden decorative material D, on a wooden base material B, at least two layers of an emboss receiving layer 1 which is thermoplastic at least at the time of an embossing, and a decorative layer 2 are laminated in this order, and an uneven pattern 3 is formed on the decorative layer 2, and the uneven pattern 3 further reaches the emboss receiving layer, for the constitution. In manufacturing the decorative material, on a supporting body sheet, a transfer sheet wherein at least two layers of the decorative layer 2 and the emboss receiving layer 1 which is thermoplastic at least at the time of an embossing are laminated in this order is used as a transfer layer, and after the transfer layer is transferred to the wooden base material, to the transferred transfer layer after peeling the supporting body sheet, an uneven pattern which reaches the emboss receiving layer is applied by an embossing, under a state wherein the emboss receiving layer is thermoplastic.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention is used for doors, window frames, sills and other fittings, walls and other interior materials, or furniture and other building materials.
The present invention relates to a wooden decorative material such as a plate-like or column-like material having an embossed pattern such as a wood-grain conduit groove, and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, decorative materials such as decorative boards using woody base materials such as MDF (medium density fiberboard) and plywood have been manufactured by decorative techniques such as laminating and transferring as described below. It is used for various purposes.

[0003] A method of laminating a laminate type decorative sheet in which a base material sheet made of a thermoplastic resin such as a vinyl chloride resin has been decorated by printing a decorative layer or the like on a wooden base material (Japanese Patent Publication No. 28-5036, 33
No. 14390). In this method, the wooden substrate may be a columnar material in addition to a plate-like material. The latter is called a so-called wrapping method (Japanese Patent Publication No. Sho 61-5895).
Reference). Further, in the transfer method, there is a method for a plate-like base material as in the invention disclosed in JP-A-52-146311, etc., but as in JP-A-5-330013, a columnar substrate is formed by a so-called lapping transfer method. There is also a method of manufacturing a decorative material by decorating the base material. But anyway, these are
Uneven patterns such as wood channel grooves cannot be expressed. Therefore, there is a method of further providing a concavo-convex pattern such as a wood grain conduit groove by embossing or the like. For example, JP-A-8-39920
In the gazette, after the transfer of the transfer layer to the base material from the wood grain pattern transfer sheet including the support sheet and the transfer layer is completed, a metal stamping roller (emboss roller) is interposed between the transfer sheet and another transfer sheet for coloring. ), The support sheet of the transfer sheet for coloring is then peeled off, and a method of manufacturing a decorative material having a transfer-colored layer by the transfer sheet for coloring in the concave portion of the uneven pattern is disclosed. Japanese Patent No. 2564231 discloses a method of utilizing the unevenness pattern of the base material. A wood base material made of MDF (medium density fiberboard) is mechanically embossed with an uneven roll to provide unevenness, and then a transfer sheet is formed. Discloses a method of transferring a transfer layer by means of the above method so that an uneven pattern due to the unevenness appears on the surface of the transfer layer. In the case of the laminate type decorative sheet, the decorative sheet is preliminarily embossed and then laminated on a base material to form an embossed decorative material (Japanese Patent Publication No. 58-58).
No. 14312).

[0004]

However, the method for producing a decorative material according to the above (1) has the following problems. First, as described above, in the case of (1) and (2), a concavo-convex pattern by embossing is not obtained, and the design is inferior. In addition, in the case of embossing a transfer layer (printing ink layer) of a thin film having a thickness of several μm, several tens μm which can be visually identified as an uneven pattern.
It was impossible in principle to form a concavo-convex pattern of up to several hundred μm. In addition, in this method, embossing is performed via a transfer sheet in between, and then the support sheet of the transfer sheet is peeled off, so that the emboss does not enter deeply and a sharp uneven pattern is difficult. For this reason, the designability is further improved by the temporary embossing, but it is impossible to express a realistic conduit groove or the like. Further, in the case, a sharp uneven pattern is difficult to express the uneven pattern under the transfer layer through the transfer layer. In addition, the emboss itself is difficult to enter into the MDF substrate. In addition, in order to transfer on the uneven pattern, in the deep uneven pattern,
The transfer layer hardly enters the inside of the concave portion, and is difficult with a normal roller transfer method. Further, in the laminating method, a base sheet which is thicker for printing suitability and laminating suitability in the production of a decorative sheet than the transfer sheet is also laminated on the base material as it is. For this reason, the base sheet which does not essentially contribute to the decoration is attached to the decorative material of the final product, which is not resource saving. On the other hand, in the case of the transfer sheet, the peeled support sheet (corresponding to the base sheet) can be recovered and reused immediately, but in a particular method, the thermoplastic resin sheet has an uneven pattern. Because the decorative sheet is attached to the substrate, the heat and pressure at the time of laminating may cause the uneven pattern to become shallow,
There was also a problem that the phenomenon of partial disappearance was likely to occur.

Accordingly, an object of the present invention is to provide a sharp and deep embossed concavo-convex pattern even when a wooden base material is transferred and decorated as a decorative material, so that a realistic grain conduit groove or the like can be expressed. It is.

[0006]

Therefore, in order to solve the above problems, in the wood decorative material of the present invention, an emboss receiving layer, which is thermoplastic at least when embossed, is formed on a wooden base material.
This is a wooden decorative material in which at least two decorative layers are laminated in this order, and has a configuration in which an uneven pattern is formed on the decorative layer and further reaches the emboss receiving layer. As a result, due to the presence of the emboss receiving layer provided below the decorative layer, a deep emboss can be imparted even if the wooden base material is hard and cannot be embossed. Moreover, the embossing can be sharpened because of the embossing receiving layer. Therefore,
Can be used as a high-design decorative material.

[0007] The method for producing a woody decorative material according to the present invention comprises:
Using a transfer sheet in which at least a decorative layer is laminated as a transfer layer on a support sheet, after completing the transfer of the transfer layer to the wood substrate, embossing the transferred transfer layer after the support sheet is peeled off. did. As a result, since embossing is performed without interposing a transfer sheet therebetween, sharp embossing can be provided. Further, since the decorative layer is formed not by lamination but by transfer, the peeled support sheet can be recovered and reused, which is resource saving.

[0008] The method for producing a woody decorative material of the present invention comprises:
Further to the above-mentioned production method, as a transfer sheet, as a transfer layer on a support sheet, using a transfer sheet in which at least two layers of a decorative layer and at least emboss receiving layer which is thermoplastic at the time of embossing are laminated in this order, After the transfer layer is completely transferred to the wood substrate, the transferred transfer layer after the support sheet has been peeled off is embossed, so that the emboss receiving layer is in a thermoplastic state so as to have an uneven pattern reaching the emboss receiving layer. did. As a result, due to the presence of the embossing receiving layer, even if the decoration layer itself is thinner than the depth of the uneven pattern,
In addition, even when the underlying wooden substrate is hard and cannot be embossed, sharp and deep embossing can be provided.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a wood decorative material of the present invention and a method for producing the same will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing an example of the form of the wood decorative material of the present invention. FIG. 2 is a cross-sectional view illustrating a transfer sheet that can be used in the method for manufacturing a woody decorative material of the present invention. FIG. 3 shows a method for producing a wooden decorative material of the present invention.
FIG. 4 is a conceptual diagram conceptually illustrating one embodiment of the present invention, and FIG. 4 is a conceptual diagram (perspective view) conceptually illustrating one embodiment of a method of manufacturing a woody decorative material according to the present invention using a lapping transfer method. ).

[Summary] First, as shown in FIG. 1 (A), a wood decorative material D of the present invention is formed on a wooden base material B by at least an emboss receiving layer 1 and a decorative layer 2 which are thermoplastic at least when embossed. Two layers are stacked in this order, and the uneven pattern 3 is not limited to being formed on the surface of the decorative layer, but further reaches the emboss receiving layer 1. Decorative layer 2
Is a layer having a pattern or the like by printing or the like. The embossed concavo-convex pattern 3 is formed on the decoration layer 2.
The uneven pattern 3 is a wood grain conduit groove pattern or the like. Emboss receiving layer 1
Is, for example, a layer made of a thermoplastic resin is typical,
In addition, a layer made of a curable resin that is cured by heat or the like and completely cured after embossing and not being thermoplastic may be used. Further, the emboss receiving layer is a layer having a thickness necessary to realize the depth of the concave portion to be embossed according to the use of the wood decorative material. Therefore, even if the decoration layer is thin, if the emboss receiving layer is made thicker than the decoration layer, the emboss can be easily formed. However, since the material is wasted even if it is made thicker than necessary, the thickness is necessary and sufficient for embossing. In addition, the fact that the uneven pattern reaches not only the decorative layer but also the embossing receiving layer means that the emboss (the front end) may reach the wooden base material B as in the uneven pattern 3a in FIG. Of course, the emboss (the tip) may be stopped in the emboss receiving layer as in the uneven pattern 3b.

The method for producing the woody decorative material of the present invention as described above is basically not particularly limited. Therefore, for example, after transferring a transfer layer having a configuration in which an emboss receiving layer and a decorative layer are laminated in advance on a wooden base material, an embossed pattern is formed by embossing, or the emboss receiving layer and the decorative layer are previously formed on a transfer sheet. An embossed transfer sheet may be transferred. Alternatively, an embossing receiving layer may be previously formed on a wooden substrate by painting or the like, and the decorative layer may be transferred to the embossing receiving layer, and then the embossing pattern may be formed on the decorative layer and the embossing receiving layer by embossing. . However, in the method for producing a wood decorative material of the present invention, at least the decorative layer is formed by transfer from a transfer sheet. As a result, since the decorative layer is transferred and formed, the peeled support sheet can be recovered and reused as compared with the laminating method, thereby saving resources. The transfer sheet may have a configuration having at least a decorative layer as the transfer layer. However, as the transfer layer, a sheet having a structure having the emboss receiving layer 1 in addition to the decorative layer 2 as the transfer layer 7 on the support sheet 6, such as a transfer sheet S shown in FIG. (In addition, it also has the peeling layer 8 in the figure). If the emboss receiving layer in the wooden decorative material is formed by transfer from the transfer sheet side, a relatively uniform emboss receiving layer can be provided and the emboss can be stably formed even when the wooden base material has a columnar shape. .

The transfer and embossing are performed, for example, as shown in a conceptual diagram of one embodiment of FIG. Then, only the support sheet 6 of the transfer sheet is peeled off to leave the transfer layer on the wooden substrate. This completes the transfer. Next, the transfer layer transferred onto the wood base material and after the support sheet is peeled off is embossed. Embossing is performed by an embossing roller 13 or the like as shown in FIG. As a result, the wood decorative material D of the present invention having the embossed concavo-convex pattern 3 is obtained.

Hereinafter, the woody decorative material of the present invention and the method for producing the same will be described in detail.

[Wood Substrate] The wood substrate B is not particularly limited as long as it is a wood substrate. Wood species are, for example, cedar, pine, cypress, oak, lauan, teak, melapy and the like. The form is veneer, plywood, medium density fiberboard (MD
F), particle board, laminated wood, and the like. The shape of the substrate is a flat plate, a columnar body, or the like. Prior to lamination of the transfer sheet, the wood base material may be subjected to a known sealing treatment, a coloring coating treatment, or the like, if necessary.

[Emboss-Receiving Layer] At least the emboss-receiving layer 1, which is thermoplastic at the time of embossing, may be formed in advance on a wooden substrate in the production method of the present invention. It is formed as a part of the transfer layer of the sheet, and is applied to the wood decorative material by transfer at the same time as the decorative layer.
The emboss receiving layer may be formed on the transfer sheet in advance, or may be formed when the transfer sheet is used. That is, the transfer sheet in which the emboss receiving layer used in the present invention is also laminated as the transfer layer means a sheet formed by any of these. The emboss receiving layer may be formed on the transfer sheet or may be formed on the wood substrate side. If the emboss receiving layer is also used as an adhesive layer for bonding the transfer layer to the wooden substrate,
A dedicated adhesive layer can be omitted, which is preferable. The bonding mechanism may be a heat fusion type, a solvent evaporation type, or the like. The curable resin described later is finally cured type adhesive, but the initial adhesion is performed by a heat fusion type or a solvent evaporation type. In the solvent volatilization type, since the solvent is brought into contact with the solvent in an undried state (before complete drying) to adhere by volatilization of the solvent or absorption to the wood base material, the emboss receiving layer is applied when the transfer sheet is laminated on the wood base material. Will be.

The emboss receiving layer 1 receives an emboss due to mechanical pressing from the decoration layer side, and forms an embossed pattern due to a deep emboss (usually larger than the thickness of the decoration layer) that cannot be accommodated by the decoration layer alone. This is a layer that can be easily formed. Therefore, the emboss receiving layer is made of a material exhibiting thermoplasticity at least when embossing. As the material, for example, in addition to a thermoplastic resin, a curable resin can be used in a form in which it is embossed in an uncured thermoplastic state, and is completely cured after embossing. Examples of the curing form of the curable resin include heat, moisture (water), and ionizing radiation such as ultraviolet rays and electron beams. In the case of heat, a thermosetting resin is used. In the case of moisture, a one-component curable urethane resin is used. In the case of ionizing radiation, an ionizing radiation curable resin such as an ultraviolet curable resin or an electron beam curable resin is used. At the time of embossing, the curable resin is in an uncured or semi-cured (that is, partially cured) state, and is in a thermoplastic state such that unevenness due to embossing is not completely restored. Therefore, the curable resin may be a liquid composition when not completely cured.

In the case where the emboss receiving layer 1 is also used as an adhesive layer, if the emboss receiving layer is in a thermoplastic state at the time of embossing, it can be in a thermoplastic state even at the time of transfer sheet lamination. It is also preferable to use a conductive resin as a heat-fusable adhesive. Further, the thermoplastic resin and the curable resin can be used as a heat-sealing adhesive by selecting a heat softening temperature (a temperature for the uncured composition in the case of the curable resin), and a resin having a high heat softening temperature can be used. , A solvent solution (including a dispersion) or the like can be used as a solvent-evaporating adhesive. The thickness of the emboss receiving layer is 5 to 100 μm, although it depends on the emboss shape such as depth.
When the thickness is within the range of, preferably, 20 to 100 μm, and more preferably, 40 to 100 μm, it is possible to impart a highly designable uneven pattern. The lower limit of the thickness is set to be about the depth of the visible uneven pattern. The upper limit of the thickness is set in accordance with the depth of the deepest part of the concave portion of the concave and convex pattern, but usually about 100 μm is sufficient.

Examples of the thermoplastic resin include polyamide resins such as a polymer obtained by polycondensation of dimer acid and ethylenediamine disclosed in Japanese Patent Publication No. 7-436, a thermoplastic urethane resin, a vinyl chloride resin. A vinyl acetate copolymer, a polyvinyl acetate resin, an acrylic resin, or the like may be used. As the polyamide comprising the condensate of the dimer acid and ethylenediamine, for example, a melting point of 15
0-170 ° C polyamide and melting point 180-230 ° C
Is a preferred example. Specific examples of these polyamides include nylon 6, nylon 66, nylon 610, nylon 612, nylon 1
1, nylon 12, copolymer nylon, nylon MXD,
Nylon 46 and the like, and bursalon type polyamide is particularly preferable. Further, as the thermoplastic resin, polyolefin resins such as polypropylene, polyethylene, polymethylpentene, ethylene-propylene-butene terpolymer, and olefin-based thermoplastic elastomer can be used according to the intended use.

As the thermosetting resin, for example, a thermosetting urethane resin can be used. Such a thermosetting urethane resin can also be used as a normal-temperature solid resin composition when not cured. In this case, in order not to completely cure at that time in order to be a thermoplastic solid at the time of embossing, adjust the heating conditions at the time of pressing the transfer sheet or at the time of embossing, or incompletely cure to the extent that the fluidity is lost, or A blocked isocyanate may be used as the isocyanate. As the isocyanate constituting the thermosetting urethane resin having such properties and the active hydrogen-containing compound which reacts with the isocyanate, for example, the following compounds can be used.

As the isocyanate, a divalent or higher aliphatic or aromatic isocyanate can be used. For example, as an aliphatic (or alicyclic) type, hexamethylene diisocyanate, isophorone diisocyanate,
Divalent isocyanates such as hydrogenated tolylene diisocyanate, and aromatics such as 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, xylene diisocyanate, 4,4'-diphenylmethane diisocyanate, and 1,5-naphthalene diisocyanate Or a divalent isocyanate such as Desmosur R (Ba
Yer, trade name of tolylene diisocyanate adduct), Desmosur L (Bayer, trade name of tolylene diisocyanate adduct), etc. 4 such as body polymer
Or higher isocyanates can be used. Also, various adducts such as Desmosur L can be used. When weather resistance is required for exterior use or the like, an aliphatic (or alicyclic) type is preferable.

The above-mentioned isocyanate may be used alone, but it is used in such a form that the following blocking agent is added to the isocyanate group to react, and at the time of cross-linking and curing, an appropriate combination of a dissociation catalyst is used and the blocking is released. It may be used as a blocked isocyanate. In addition, as for the isocyanate simple substance, a liquid at room temperature can be solidified and used. By using as a blocked isocyanate, it is possible to prevent the thermoplasticity from being lost due to crosslinking and curing before embossing.

Examples of the blocking agent include phenol, cresol, xylenol, p-ethylphenol, o-isopropylphenol, p-tert-butylphenol, p-tert-octylphenol, thymol, p-naphthol, p-nitrophenol and p-nitrophenol. −
Phenolic blocking agents such as chlorophenol, alcohol blocking agents such as methanol, ethanol, propanol, butanol, ethylene glycol, methyl cellosolve, butyl cellosolve, methyl carbitol, benzyl alcohol, phenyl cellosolve, furfuryl alcohol, cyclohexanol, and malonic acid Active methylenes such as dimethyl, diethyl malonate, ethyl acetoacetate, butyl mercaptan, thiophenol, ter
Mercaptan-based blocking agents such as t-dodecyl mercaptan, acid amide-based blocking agents such as acetanilide, acetoanisidide, acetate amide and benzamide; imide-based blocking agents such as succinimide and maleic imide; diphenylamine, phenylnaphthylamine, aniline, carbazole and the like Amine blocking agents, imidazole blocking agents such as imidazole and 2-ethylimidazole, urea blocking agents such as urea, thiourea and ethylene urea, and carbamate blocking such as phenyl N-phenylcarbamate and 2-oxazolidone. Agents, imine blocking agents such as ethyleneimine, oxime blocking agents such as formaldoxime, acetoaldoxime, methyl ethyl ketoxime, and cyclohexanone oxime. Ing agent, sodium bisulfite, and the like sulfurous acid blocking agents such as bisulfite and potassium gluconate.

As the active hydrogen-containing compound that reacts with the isocyanate, a compound containing a hydroxyl group, a carboxyl group, or the like in a molecule is used. Among them, a polyol having two or more hydroxyl groups in a molecule is typical. is there.
In order to form a solid thermoplastic uncured product at room temperature, a polyol that is solid at room temperature is preferably used. For example, polyester polyols such as poly (ethylene adipate), poly (butylene adipate), poly (neopentyl adipate), poly (hexamethylene adipate), poly (butylene azelate), poly (butylene sebacate), polycaprolactone, polyethylene Oxides, polypropylene oxide, polyether polyols such as poly (tetramethylene ether), polycarbonate polyols such as poly (butylene carbonate) and poly (hexamethylene carbonate), acrylic polyols, urethane polyols, and the like. The number average molecular weight of these polyols is, for example, 600 to 500.
It is in the range of 0.

In the polyurethane adhesive containing the isocyanate and the active hydrogen-containing compound, a curing catalyst such as a conventionally known metal salt, and a metal soap for lowering the dissociation temperature when a blocking agent is used. And the like.

Next, the one-component curable urethane resin as the moisture-curable resin is suitable for a form to be applied immediately before transfer from the viewpoint of work stability because the curing reaction proceeds with moisture in the air when left naturally. The one-component curable urethane resin is a composition containing a prepolymer having an isocyanate group at a molecular terminal as an essential component. The prepolymer is usually a polyisocyanate prepolymer having one or more isocyanate groups at both molecular terminals, and is a solid thermoplastic resin at room temperature. The isocyanate groups react with each other due to moisture in the air to cause a chain extension reaction. As a result, a reactant having a urea bond in the molecular chain is generated, and the isocyanate group at the molecular end further reacts with the urea bond. , Causing biuret bonding and branching to cause a crosslinking reaction. The polyisocyanate prepolymer is, for example, a polyol as listed in the thermosetting urethane resin,
It is a compound obtained by reacting an excess of the above-listed polyisocyanate, and its skeletal structure includes a polyurethane skeleton, a polyester skeleton, a polybutadiene skeleton, and the like.
The physical properties can be adjusted by appropriately employing one or more of these skeletal structures. In the case of a urethane skeleton,
The terminal isocyanate group also reacts with the urethane bond in the molecular chain to generate an allophanate bond, which also causes a cross-linking reaction.

Next, as the ionizing radiation-curable resin, a resin (composition) which is thermoplastic and exhibits a solid state at room temperature when not cured, and which is cross-linked and cured by irradiation with ionizing radiation can be used. The resin can be intimately adhered to the wood substrate by heat fusion, then shaped by embossing, and then cross-linked and hardened to obtain a hard and final adhesion. The resin can be melt-coated without solvent, but can also be solution-coated by diluting the solvent. In addition,
The “normal temperature” in the present invention means the ambient temperature in a room (or outside) where a transfer sheet is manufactured and stored, and a support sheet is peeled off. The specific value varies depending on the climate and the working environment, but is usually in the range of 10 to 40 ° C, more usually in the range of 15 to 25 ° C. Room temperature is the lowest temperature at which the support is peeled off. As the resin having such properties, for example, the following ionizing radiation-curable resins (I) and (II) can be used.

(I) having a radically polymerizable unsaturated group,
The following two types of thermoplastic resins (1) or (2). (1) Those having a radical polymerizable unsaturated group in a polymer having a glass transition temperature of 0 to 250 ° C. More specifically, a polymer obtained by polymerizing or copolymerizing the following can be used by introducing a radical polymerizable unsaturated group by methods (a) to (d) described below. In the following, for example, (meth) acrylate is used to mean acrylate or methacrylate. A monomer having a hydroxyl group; N-methylol (meth) acrylamide, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate,
2-hydroxybutyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, and the like. Monomers having a carboxyl group; (meth) acrylic acid, (meth) acryloyloxyethyl monosuccinate and the like. Monomers having an epoxy group; glycidyl (meth) acrylate and the like. Monomers having an aziridinyl group; 2-aziridinylethyl (meth) acrylate, allyl 2-aziridinylpropionate, and the like. Monomer having an amino group; (meth) acrylamide, diacetone (meth) acrylamide, dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate and the like. A monomer having a sulfone group; 2- (meth) acrylamido-2-methylpropanesulfonic acid and the like. A monomer having an isocyanate group; an adduct of a diisocyanate and a radical polymerizable monomer having active hydrogen, such as an adduct of 1 to 1 mol of 2,4-toluene diisocyanate and 2-hydroxyethyl (meth) acrylate; A monomer copolymerizable with the above-mentioned monomers and other than the above-mentioned monomers; this monomer is used as a copolymer component for controlling the glass transition temperature and physical properties of the obtained copolymer.
For example, methyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, tert-butyl (meth) acrylate, isoamyl (meth) acrylate,
Cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and the like.

Next, the polymer or copolymer obtained as described above is reacted by the following methods (a) to (d) to introduce a radically polymerizable unsaturated group. (a) In the case of a polymer or copolymer of a monomer having a hydroxyl group, a monomer having a carboxyl group such as the aforementioned (meth) acrylic acid is subjected to a condensation reaction. (b) In the case of a polymer or copolymer of a monomer having a carboxyl group or a sulfone group, the above-mentioned monomer having a hydroxyl group is subjected to a condensation reaction. (c) In the case of a polymer or copolymer of a monomer having an epoxy group, an isocyanate group, or an aziridinyl group, the above-mentioned monomer having a hydroxyl group or the above-described monomer having a carboxyl group is subjected to an addition reaction. (d) In the case of a polymer or copolymer of a monomer having a hydroxyl group or a carboxyl group, the monomer having the epoxy group or the monomer having the aziridinyl or the diisocyanate compound and the hydroxyl group-containing acrylate monomer A monomer having an isocyanate group such as 1 mole to 1 mole of an adduct is
Addition reaction is performed. In order to carry out the above reaction, it is desirable to add a trace amount of a polymerization inhibitor such as hydroquinone and to carry out the reaction while sending dry air.

(2) A compound having a melting point of 20 ° C. to 250 ° C. and having a radically polymerizable unsaturated group. Specific examples include stearyl (meth) acrylate, triacryl isocyanurate, cyclohexanediol di (meth) acrylate, spiroglycol diacrylate, spiroglycol (meth) acrylate, and the like.

Further, the above (1) and (2) can be used as a mixture. Furthermore, the above (1) or (2), or (1) and
A radical polymerizable monomer can be added as a reactive diluent to the mixture of (2). The radical polymerizable monomer increases the crosslink density by irradiation with ionizing radiation such as ultraviolet rays or electron beams, and improves heat resistance and surface properties. Examples of the monomer include ethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate,
Hexanediol di (meth) acrylate, trimethylolpropane di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol tetra (meth) acrylate , Dipentaerythritol hexa (meth) acrylate, ethylene glycol diglycidyl ether di (meth) acrylate, polyethylene glycol diglycidyl ether di (meth) acrylate, propylene glycol diglycidyl ether di (meth) acrylate, polypropylene glycol diglycidyl ether di Use of (meth) acrylate, sorbitol tetraglycidyl ether tetra (meth) acrylate, etc. It can be. The blending amount is (1) or
With respect to 100 parts by weight of the resin alone or as a mixture of (2),
It is preferable to use 0.1 to 100 parts by weight.

(II) An ionizing radiation-curable resin obtained by mixing a non-crosslinking resin that is a thermoplastic solid at room temperature with an ionizing radiation-curable resin that is liquid at room temperature. (A) A composition comprising an ionizing radiation-curable resin which is liquid at room temperature; a prepolymer or a monomer having a radically polymerizable unsaturated group in a molecule, alone or as a mixture. Alternatively, it is a composition comprising a prepolymer or monomer having a cationically polymerizable functional group. Examples of the prepolymer having a radical polymerizable unsaturated group include polyester (meth) acrylate, urethane (meth) acrylate, epoxy (meth) acrylate, melamine (meth) acrylate, and triazine (meth) acrylate. Monomers having a radical polymerizable unsaturated group include, for example, monofunctional monomers such as methyl (meth) acrylate, diethylene glycol di (meth) acrylate, trimethylpropane tri (meth) acrylate, and dipentaerythritol hexa (meth) acrylate. There are polyfunctional monomers. Examples of the prepolymer having a cationically polymerizable functional group include prepolymers of epoxy resins such as bisphenol epoxy resins and novolak epoxy compounds, and vinyl ether resins such as fatty acid vinyl ethers and aromatic vinyl ethers.

(B) The non-crosslinked resin is a thermoplastic resin which does not contribute to the crosslinking and curing reaction due to ionizing radiation at room temperature and is, for example, an acrylic resin, a cellulose resin, a polyester resin, or a vinyl acetate resin. And vinyl resins such as vinyl chloride-vinyl acetate copolymers and butyral resins. Above all, it is an acrylic resin having an average molecular weight of 50,000 to 600,000 and a glass transition temperature of 5
When the temperature is 0 to 130 ° C., non-adhesiveness at room temperature uncured (dryness to touch), adhesiveness by heat fusion, flexibility at transfer (uncured) (moldability), embossability, It is preferable from the viewpoint of absorbing and relaxing stress after curing.

In the case of curing with ultraviolet rays, a photopolymerization initiator is further added to the ionizing radiation curable resin (I) or (II). The photopolymerization initiator uses acetophenones, benzophenones, thioxanthones, benzoin, benzoin methyl ethers alone or in a mixture in a radical polymerization system, and an aromatic diazonium salt, an aromatic sulfonium salt, and an aromatic iodonium salt in a cationic polymerization system. , A metallocene compound, a benzoinsulfonic acid ester or the like is used alone or in combination. In addition, as the ionizing radiation, an electromagnetic wave or a charged particle having energy capable of crosslinking the molecules in the adhesive is used. Those commonly used are ultraviolet rays or electron beams. As the ultraviolet light source, a light source such as an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc lamp, a black light, and a metal halide lamp is used. As the electron beam source, various electron beam accelerators such as Cockcroft-Walton type, Van degraft type, resonance transformer type, insulating core transformer type, or linear type, dynamitron type, high frequency type, etc., are used at 100 to 1000 keV,
Preferably, one that irradiates electrons having an energy of 100 to 300 keV is used.

Incidentally, various additives may be further added to the above-mentioned various resins constituting the emboss receiving layer, if necessary. For example, when the emboss receiving layer is provided from the transfer sheet side, it is preferable to add an inorganic pigment for the purpose of improving the cut-off property of the foil of the transfer sheet. Examples of the inorganic pigment include fine powders of calcium carbonate, barium sulfate, silica, titanium oxide, alumina and the like. The particle size is preferably in the range of 0.1 to 10 μm from the viewpoint of the above effects. In addition, the addition amount is preferably in the range of 1 to 25 parts by weight with respect to 100 parts by weight of the resin component from the viewpoint of the above effects. In addition, a coloring agent such as a dye or a pigment may be added to the emboss receiving layer. Depending on the colorant, the emboss receiving layer can also be part of the decoration together with the decorative layer as a colored solid layer. Coloring may be colorless, transparent or transparent if you want to make use of the luster (glow) or grain of the wood substrate as a design appearance, but opaque (including white) if you want to hide the color of the wood substrate or the grain of the surface ) Can be used as a colored concealing layer, and providing a colored concealing layer as a part of the decorative layer can be omitted. Further, the emboss receiving layer may be translucent.

The formation of the emboss receiving layer is carried out by dissolving (or dispersing) the above resin in a solvent (or dispersion medium) such as water or an organic solvent.
It is applied in the form of a solution (or dispersion), or in the form of a solventless liquid or hot melt. The forming method is not particularly limited, and may be performed by a conventionally known coating method, for example, roll coating, reverse roll coating, knife coating, gravure coating, rod coating, or the like. Alternatively, a printing method such as silk screen printing may be used. In the case where it is provided on the wooden base material side, a coating method such as spray coating may be used. Further, when a polyolefin resin is used for the emboss receiving layer, it may be formed by a melt extrusion coating method using a T-die or the like.

When the emboss receiving layer is formed on the transfer sheet side when the transfer sheet is used, for example, as shown in the conceptual diagram of FIG. 3, the emboss receiving layer forming means 14 comprising a coating device or a printing device unwinds. The transfer sheet S may be formed before the continuous belt-shaped transfer sheet S unwound from the roll Ra is pressed against the wooden base material B by the pressing roller 11. At this time, in the case where a necessary amount of the solvent is dried before the transfer sheet is laminated, a drying device 15 using a known means such as hot air may be provided after the emboss receiving layer forming means 14. The same applies to the case of providing on the wooden base material side. In addition, the drying device 15
It may be used as a heating device for preheating the transfer sheet.

[Decoration Layer] The decoration layer is not particularly limited. Conventionally known ones may be used. For example, conventionally known methods such as gravure printing, silk screen printing, offset printing, etc., a picture layer printed with a picture or the like with a material, a simple colored layer, a transparent resin layer, or a metal such as aluminum or chromium by a known vapor deposition method or the like. It is a metal thin film layer formed on a part or the whole surface. The pattern is arbitrary, such as a wood pattern, a stone pattern such as marble or granite, a tile pattern, a brick pattern, a cloth pattern, a character, or a geometric pattern. In particular, since the wood decorative material according to the present invention has an embossed pattern, if it is used as a conduit groove pattern,
A wood grain pattern or the like is one of suitable patterns.

The ink for a picture layer comprises a vehicle such as a binder, a coloring agent such as a pigment or a dye, and various additives appropriately added thereto. For the binder, for example, acrylic resin, chlorinated polyolefin resin, chlorinated polypropylene, vinyl acetate resin, butyral resin, vinyl chloride-vinyl acetate copolymer, thermoplastic resin such as cellulose resin, polyurethane resin, epoxy resin, etc. A room temperature or thermosetting resin or the like is used alone or in the form of a mixture of these resins. Colorant pigments include titanium white, carbon black, red iron oxide, graphite, inorganic pigments such as ultramarine blue, aniline black, quinacridone, isoindolinone, organic pigments such as phthalocyanine blue, metal pigments such as aluminum foil powder,
Pearlescent pigments such as mica foil powder coated with titanium dioxide.

[Concavo-convex pattern] The concavo-convex pattern formed by embossing is not particularly limited. The uneven pattern is, for example, a grain, a satin finish, a hairline, a linear groove, a concave and convex pattern of a cleavage face of granite, a grain conduit groove, a grain annual ring pattern, a texture of a cloth grain, a leather squeezing, a character, a geometric pattern, and the like. . In particular, in the present invention, since a deep uneven pattern or a sharp uneven pattern can be obtained, a highly designed uneven pattern can be obtained. Further, since a deep and sharp uneven pattern can be formed,
No. 4, Japanese Patent Publication No. WO 95/21060, etc., a concave-convex pattern with a changed depth formed by an embossing plate having a convex portion whose height is changed by multi-step etching or the like Are also suitable. The depth of the concavo-convex pattern depends on the thickness of the emboss receiving layer provided, but is, for example, about 30 to 100 μm.

[Transparent Layer, Release Layer] The wooden decorative material of the present invention is provided with a transparent layer 4 if necessary on the decorative layer 2 like a wooden decorative material D illustrated in FIG. 1 (B). A stacked structure may be used. The transparent layer is, for example, a transparent resin layer. The transparent layer is
The release layer 8 in the transfer layer 7 is provided as a transferred layer as in the transfer sheet S illustrated in FIG. 2B, or is applied as a topcoat layer on the transferred decorative layer by painting or the like. Further, an overcoat layer may be further formed on the release layer after the transfer, and a multilayer transparent layer composed of both layers may be used. The transparent layer is a colorless or colored layer, and is formed as a functional layer for protecting the decorative layer or as a kind of decorative layer for providing a design feeling such as a painted feeling. For the transparent layer, a binder resin or the like listed in the picture layer ink of the decorative layer is used. In the transparent layer, benzotriazole-based, benzophenone-based ultraviolet absorbers, hindered amine-based radical scavengers and other light stabilizers, silica, lubricating agents consisting of particles such as spherical α-alumina, coloring pigments, extenders A pigment, a lubricant and the like may be contained. The release layer is formed by a conventionally known printing method or a coating method such as roll coating similarly to the decorative layer, and the overcoat layer is formed by a conventionally known coating method such as roll coating. The thickness of the transparent layer is about 0.1 to 10 μm when applied as a release layer, and about 1 to 100 μm when applied as an overcoat layer.

[Adhesive Layer] The wood decorative material of the present invention is, as shown in the wood decorative material D illustrated in FIG. 1 (B), bonded between the emboss receiving layer 1 and the wooden base material D. May be provided as necessary. The adhesive layer here also includes a primer layer and an anchor layer. The adhesive layer is formed on the wooden base material side, or is transferred and formed simultaneously with the emboss receiving layer from the transfer sheet side. The transfer sheet S illustrated in FIG. 2B has the adhesive layer 5 in the transfer layer 7. Of course, the emboss receiving layer is preferably used also as the adhesive layer, but by providing the adhesive layer, the emboss receiving layer can be selected mainly based on emboss suitability. As the resin for the adhesive layer, for example, in addition to the resins listed in the emboss receiving layer, known adhesives can be used, and the resin composition of the emboss receiving layer and the wood composition used can be appropriately selected according to the application. good. The adhesive layer may be formed by a conventionally known coating method or the like, similarly to the emboss receiving layer. The thickness of the adhesive layer is about 0.1 to 50 μm. When the transfer layer is composed of multiple layers as described above, there may be an easy-adhesion layer or the like for improving interlayer adhesion.

[Support Sheet Used for Transfer Sheet] The transfer sheet is composed of a support sheet and a transfer layer that transfers and transfers. The support sheet is not particularly limited, and may be selected from conventionally known ones according to the application. Just do it. A material having good releasability from the transfer layer is used for the support sheet. The support sheet may be, for example, a polyester resin such as polyethylene terephthalate, polybutylene terephthalate, ethylene terephthalate-isophthalate copolymer, polyarylate, a polyolefin resin such as polyethylene, polypropylene, polymethylpentene, an olefin-based thermoplastic elastomer, and nylon 6. , Polyamides such as nylon 66,
Synthetic resin films (sheets) such as polyvinyl chloride, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, polyvinyl alcohol and vinyl polymer such as vinylon, or polyolefin resin and silicone resin for high quality paper, tissue paper, etc. A single layer or a laminate of coated paper, glassine paper, parchment paper, or the like having a release layer laminated thereon is used. The thickness of the support sheet is usually 20 to 200 μm.

The support sheet may be provided with a release layer as a component of the support sheet on the transfer layer side, if necessary, in order to improve the releasability from the transfer layer. As the release layer, for example, a simple substance such as a silicone resin, a melamine resin, a polyamide resin, a urethane resin, a polyolefin resin, a wax, or a mixture containing these is used. Also,
In order to adjust the releasability, the surface of the support on the transfer layer side may be subjected to corona treatment, ozone treatment, or the like.

[Transfer] A transfer sheet is laminated on a wood substrate,
As a transfer method, the transfer layer is transferred to the wood substrate by peeling off the support sheet after the transfer layer has adhered to the wood substrate to the extent that the transfer sheet can only be peeled while leaving the transfer layer on the wood substrate side. Is not particularly limited. What is necessary is just to select suitably from conventionally well-known transfer methods. For a plate material or the like having a flat transfer surface of a wooden substrate, a roller transfer method is typically used. Roller transfer method, for example, JP-B-60-59876, JP-A-5-270199, JP-A-5-139097, as described in JP-A-5-139097, the transfer sheet, the transfer layer facing the substrate side, This is a transfer method in which a transfer roller is pressed from the support sheet side as a pressing roller, and after the transfer layer is pressed against the base material, the support sheet is peeled off. An elastic roller is usually used as the transfer roller, and a rubber roller having at least a surface made of rubber is used. Further, the peeling of the support sheet may be performed at the same time as the pressure release of the transfer roller, or as shown in FIGS.
After the pressure of the transfer roller (pressing roller) is released, it may be after a while. When the wooden base material is a columnar material, a so-called lapping transfer method in which a plurality of transfer rollers transfer the image in small areas in a stepwise manner may be used (Japanese Patent Publication No. 59-51).
No. 900, JP-A-5-330013, JP-B-3-2666, etc.). When the wooden base material is a flat plate or the like, the transfer pressure may be a circular pressure by a roller or a flat pressure by a flat press. 3 and 4, the transfer sheet is laminated by the pressing roller 11 and then separated from the support sheet by the peeling roller 12 at a distance, but the transfer layer is bonded by, for example, heat fusion. In some cases, the support sheet may be peeled immediately after the pressure is released by using the pressing roller as a peeling roller. The peeling may be performed manually.

[Embossing] In the present invention, embossing is performed after the transfer of the transfer layer is completed, that is, after the support sheet is peeled off. When the emboss receiving layer is a curable resin, the embossing is performed when the emboss receiving layer is in a completely uncured state or a partially cured semi-cured state and still has thermoplasticity. The embossing method is not particularly limited, and a conventionally known embossing method may be used. Normally, the emboss receiving layer (and usually also the decorative layer) is softened by heating, and then pressed by an embossing plate to shape.
As the embossing plate, a metal roller or a plate-shaped plate may be used according to the shape of the wooden base material.

[Lapping Transfer and Embossing] One embodiment of the method for manufacturing a woody decorative material of the present invention shown in FIG. 3 will be described focusing on the relationship between transfer and embossing without any particular limitation on the shape of the wooden base material. FIG. 4 is a perspective view conceptually showing an embodiment in which the shape is a columnar shape. The method shown in the figure is a drawing showing an embodiment of a method of transferring by a lapping transfer method and embossing continuously in the same manner as in the lapping transfer method.

In FIG. 4, the columnar wooden base material B is placed on a plurality of feed rollers 16 and transported in the longitudinal direction.
The transfer sheet S is supplied to the wood base at a speed synchronized with the transfer speed of the wood base, and the transfer sheet is laminated on the wood base by the pressing rollers 11a to 11d in the longitudinal direction of the wood base. It is performed stepwise for each small area in the orthogonal or orthogonal direction. In the same figure, each side of the wood substrate to be transferred is a surface having a polygonal cross section, and each side forms a single plane, so each side has a dedicated pressing roller. Is used. Also, the emboss rollers 13a to 13d
The same is true for Lamination of the transfer sheet by the pressing roller
Press roller 11a, press roller 11b, press roller 11
c, the transfer sheets are laminated in the order of the pressing roller 11d, so that the adjacent side surfaces are sequentially laminated in a small area. Note that, for the pressing roller (or the embossing roller, etc.), only the portion provided on the front side of the drawing with respect to the wooden base material is shown for simplification of the drawing.

After the transfer sheets are stacked, only the support sheet 6 of the transfer sheet S is peeled off by the peeling rollers 12a to 12c in FIG.
By embossing each side in a to 13d, a wooden decorative material D can be obtained. As shown in the drawing, it is not always necessary to arrange the embossing rollers on the adjacent side surfaces in order as in the case of the pressing roller.

In this figure, drying of the solvent in the emboss receiving layer formed on the transfer sheet at the time of transfer or preheating of the transfer sheet is carried out by a drying device using hot air or the like or a heating device 15a. Just before you can do it. Similarly, for the wooden base material B, drying of the solvent component in the emboss receiving layer formed on the wooden base material at the time of transfer, or preheating of the wooden base material, is performed by the same pressing device as the drying device or the heating device 15a. It can be made just before supply.

The transfer and the embossing are performed as shown in FIGS.
May be performed continuously as illustrated in the conceptual diagram of FIG. Also, the transfer sheet
In addition to the continuous belt shape, it may be used in single sheets. For example, in the case of a flat press.

[Application of Colored Ink to Recesses of Concavo-convex Pattern]
The concave portions of the concave and convex pattern of the transfer layer formed by embossing may be further filled with a coloring ink and solidified. In particular, if the colored ink is filled into the recesses, such as wood grain conduits, and solidified,
It can express wood grain conduits and the like that are richer in design.

For this purpose, a conventionally known wiping method can be used as the post-processing. In the wiping method, for example, by a doctor blade coating method or a knife coating method,
After the colored ink is applied to the entire surface including the concave portion, the colored ink is removed from the surface other than the concave portion, so that only the inside of the concave portion is filled with the colored ink. After filling, the colored ink in the recess is solidified. The solidification is performed by drying when there is a volatile component such as a solvent, and by using a non-solvent having no volatile component, the resin is cured by a curing reaction using ionizing radiation such as heat or ultraviolet rays, and is performed by both drying and curing. Note that the filling does not have to be performed in the entire recess. In addition, as a coloring ink, acrylic resin, vinyl chloride-
Conventionally known thermoplastic resins such as vinyl acetate copolymers, cellulosic resins and the like, two-component curable urethane resins, thermosetting resins such as epoxy resins, unsaturated acrylate resins, ionizing radiation-curable resins such as epoxy resins, etc. Using a resin, a coloring agent such as quinacridone, an organic pigment such as isoindolinone, carbon black, an inorganic pigment such as a red iron oxide, a glittering pigment such as titanium dioxide-coated mica foil powder, and the like. An ink containing other additives or an emulsion-type water-based ink is used. In the case where the concave portion is a grain conduit groove, generally, a black-brown or brown-colored ink is used.

In order to apply the coloring ink in the concave portions, so-called valley printing may be performed. In the burre print, a coloring ink can be attached to the projections of the embossing plate, and the coloring ink can be applied to the inside of the depressions of the projections and depressions at the same time as the embossing. In addition, since there is no need to interpose a transfer sheet for coloring between the embossing plate and the surface to be embossed (transfer layer), it is possible to emboss a sharp shape even when the colored ink is applied in the recess. As a result, a realistic and highly-designed woody decorative material can be obtained. As the coloring ink, those listed in the above wiping method can be used, for example,
An ink or the like obtained by adding carbon black as a colorant to a vehicle using a urethane resin as a binder is used for a textured pattern such as a wood channel groove.

As described above, if the coloring ink is applied to the concave portions of the embossed pattern obtained by embossing, a decorative pattern in which only the embossed concave portions are distinguished from the others can be obtained. In this case, a better design feeling can be obtained.

[Use of Wood-based Decorative Material] The use of the wood-based decorative material is not particularly limited. For example, window frames, doors, handrails, thresholds, doors and other fixtures, wall surfaces, ceilings, flooring and other building interior materials, exterior walls,
Exterior materials such as fences, roofs, gates, gable boards, furniture such as wardrobes, surface decoration materials for cabinets for light electric and OA equipment such as television receivers, interior materials for vehicles such as cars, trains, aircraft, ships, and accessories Used as a container or the like.

[0056]

EXAMPLES The present invention will be described more specifically with reference to the following examples.

Example 1 A support sheet made of a biaxially stretched polyethylene terephthalate film having a thickness of 25 μm was coated on one side with a 1 μm thick polymethyl methacrylate film.
m was formed on the entire surface by gravure printing. Further, a two-part curable urethane resin-based ink composed of acrylic polyol and hexamethylene diisocyanate was gravure-printed on the entire surface to form an easy-adhesion layer. And
On this, a binder was an acrylic resin, a coloring pigment was a coloring ink composed of carbon black, quinacridone, isoindolinone, and phthalocyanine blue, and an oak wood grain decorative layer was formed by gravure printing. Furthermore,
As the emboss receiving layer, a coating comprising 28 parts by weight of a polyamide composed of a condensate of dimer acid and ethylenediamine, 21.5 parts by weight of titanium oxide, 32 parts by weight of xylene, 18 parts by weight of isobutanol, and 0.5 part by weight of microsilica The solution is applied by roll coating, dried at 140 ° C. for 20 seconds, and touch-dried, and an emboss receiving layer serving also as an adhesive layer having a coating amount of 70 g / m ² (based on solid content) is applied and formed and wound up. Thus, a transfer sheet having a transfer layer including a release layer, an easy-adhesion layer, a decoration layer, and an emboss receiving layer was obtained.

Next, using an apparatus performed according to the processing procedure shown in FIG. 3, the transfer sheet S is used to feed an iron core at a feed rate of 8 m / min to a flat wooden base material B made of MDF. Is pressed by a pressing roller 11 having a surface temperature of 170 ° C. coated with silicone rubber, and after lamination, only the support sheet is peeled off by a peeling roller 12, and then a large number of conduit groove-shaped protrusions (maximum height) The embossing was performed by using a metal embossing roller (surface temperature: 80 ° C.) on which a transfer layer having a thickness of 70 μm was formed to reach the emboss receiving layer from above the transferred transfer layer. As a result, not only the wood pattern by the decorative layer but also the concavo-convex pattern of the conduit groove characteristic of the wood design were formed by embossing, and a realistic and high-design wood decorative material (plate) was obtained.

Example 2 In Example 1, a transfer sheet was prepared by using a sheet on which an emboss receiving layer was not formed in advance, and using a coating apparatus 14 (see FIG. 3) during transfer of the transfer sheet.
After the necessary amount of solvent is dried by the drying device 15, the emboss receiving layer is transferred in-line in a state where the emboss receiving layer has adhesiveness, and then the embossing reaches the emboss receiving layer. Was done. as a result,
In the same manner as in Example 1, a wood decorative material (board) having a realistic and high design was obtained by the wood pattern and the embossed concave and convex pattern of the conduit groove.

Example 3 On one side of a support sheet made of a biaxially stretched polyethylene terephthalate film having a thickness of 26 μm, spherical α-alumina particles having an average particle size of 5 μm were added at 10% by weight based on the resin content and 1-hydroxy An ink composed of an uncured urethane acrylate resin containing 2% by weight of a photoreaction initiator composed of cyclophenyl ketone was applied to a thickness of 1
The whole surface was roll-coated at 0 μm (based on solid content). And, on top of this, the binder is a two-component curable urethane resin,
The coloring pigment was a coloring ink composed of carbon black, quinacridone, isoindolinone, and phthalocyanine blue, and an oak wood grain decorative layer was formed by gravure printing. In addition, an ink containing a pearl pigment of mica foil powder coated with titanium dioxide was also used for the handle so that the shine of the wooden skin could be expressed. Then, after the formation of the decorative layer, ultraviolet rays are irradiated from the support sheet side (80 W / cm, two lamps) to cure the urethane acrylate resin coating layer to form a release layer, and a transfer layer comprising a release layer and a decorative layer Was prepared.

At the time of transfer of the transfer sheet, a coating apparatus 14 comprising a heating roll coater for hot melt is used.
(See FIG. 3), an emboss receiving layer was formed on the transfer layer surface of the transfer sheet by hot melt coating to a thickness of 50 μm.
Moisture-curable one-component urethane resin (trade name “ESDINE 9623” manufactured by Sekisui Chemical Co., Ltd.) for the emboss receiving layer
Was used. The transfer sheet after the formation of the embossing receiving layer is subsequently laminated by pressing at a feed speed of 5 m / min with a pressing roller 11 having a surface temperature of 60 ° C. and covering the surface of an iron core with rubber, and a support sheet with a peeling roller 12. After the transfer was completed by peeling off only the embossing roller (surface temperature: 80 ° C.), embossing was performed from the top of the transferred transfer layer to the emboss receiving layer using the emboss roller (surface temperature: 80 ° C.). As a result, not only the wood pattern by the decorative layer but also the concavo-convex pattern of the conduit groove characteristic of the wood design were formed by embossing, and a realistic and high-design wood decorative material (plate) was obtained.
The surface properties such as scratch resistance and abrasion resistance were also good due to the effect of alumina in the release layer as the outermost layer. further,
The two-component curable urethane resin-based black colored ink was filled into the concave portions of the uneven pattern of the wooden decorative material by wiping using a brush method. As a result, a more decorative wood decorative material (board) was obtained.

[0062]

According to the wood decorative material of the present invention, the presence of the embossing receiving layer provided below the decorative layer allows deep embossing even if the wooden base material is hard and cannot be embossed. . Moreover, for the emboss receiving layer,
The embossed concavo-convex pattern can have a sharp shape. Therefore, it can be made into a high-design decorative material.

The method for producing a woody decorative material according to the present invention
After the transfer of the decorative layer, the support sheet of the transfer sheet after the completion of the transfer of the decorative layer is embossed from above the transferred decorative layer, and embossed without any intervening transfer sheet, so that a sharp and deep emboss can be imparted. Further, since the decorative layer is formed not by lamination but by transfer, the peeled support sheet can be recovered and reused, which is resource saving. In addition, if the embossing receiving layer is also a manufacturing method in which the embossing receiving layer is applied to the wood decorative material from the transfer sheet side by transfer, the effect of the embossing receiving layer present below the decorative layer after the transfer can be obtained even if the wood base material is hard and embossed. Sharp and deep embossing can be applied to objects that cannot be done.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a form example of a wooden decorative material of the present invention.

FIG. 2 is a cross-sectional view illustrating a transfer sheet that can be used in the method for producing a wood decorative material of the present invention.

FIG. 3 is a conceptual diagram conceptually illustrating a method for producing a wood decorative material of the present invention.

FIG. 4 is a conceptual diagram (perspective view) conceptually illustrating a case where a method of manufacturing a woody decorative material of the present invention is performed by a lapping transfer method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Emboss receiving layer 2 Decorative layer 3 Concavo-convex pattern 4 Transparent layer 5 Adhesive layer 6 Support sheet 7 Transfer layer 8 Release layer 11, 11a-11d Press roller 12, 12a-12c Release roller 13, 13a-13d Emboss roller 14 Emboss Receiving layer forming means (coating device, etc.) 15, 15a, 15b Heating device, drying device 16 Feed roller B Wood substrate D Wood decorative material Ra Unwind roll Rb Take-up roll S Transfer sheet

Continued on the front page (51) Int.Cl. ⁶ Identification code FI B44C 1/24 B44C 1/24 B

Claims (3)

[Claims] 1. A wood decorative material comprising at least two layers of an emboss receiving layer, which is thermoplastic at the time of embossing, and a decorative layer, laminated in this order on a wooden base material, wherein an uneven pattern is formed on the decorative layer. A wood-based decorative material that even reaches the embossing receiving layer. 2. A transfer sheet comprising at least a decorative layer laminated as a transfer layer on a support sheet. After the transfer layer is completely transferred to a wood substrate, the transfer layer after the support sheet is peeled off is transferred to the transfer layer. A method for producing a wooden decorative material by embossing. 3. The method for producing a wood decorative material according to claim 2, wherein a transfer layer is formed on the support sheet at least two layers of a decorative layer and at least an emboss receiving layer which is thermoplastic at the time of embossing. Using the transfer sheet, after the transfer layer is completely transferred to the wood substrate, the transfer layer after the support sheet is peeled off is embossed on the transferred transfer layer, and the emboss receiving layer reaches the emboss receiving layer in a thermoplastic state. A method for producing a wooden decorative material with an uneven pattern.