JP2017075495A - Wood-based decorative material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wood-based decorative material which, even when a wood-based substrate formed with an ink layer made of resin, cured by ultraviolet rays, on the surface is coated with a surface protective layer made of a resin, can suppress peeling-off of the surface protective layer from the wood-based substrate.SOLUTION: A wood-based decorative material is a wood-based decorative flooring material 1 in which a pattern is printed as an ink layer 3 on a wood-based substrate 2 formed with a wood surface 2a. The ink layer 3 made of a first resin cured by ultraviolet rays is formed on the wood surface 2a so as to expose a part of the wood surface 2a. A surface protective layer 4 containing a second resin different from the first resin as a main agent and transmitting visible light is formed on the wood surface 2a, on which the ink layer 3 has been formed, to cover the wood surface 2a. The surface protective layer 4 is in contact with the exposed surface 2b of the wood surface 2a exposed from the ink layer 3.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a wooden decorative material in which a pattern is printed on a wooden surface of a wooden substrate.

  Conventionally, a wood-based decorative material in which a pattern such as a wood grain pattern is printed on the surface of a wood-based substrate has been used. As such a wood-based decorative material, for example, Patent Document 1 discloses a wood-based wood-based base material, an ink receiving layer formed on the surface of the wood-based base material, and an ink jet printer on the surface of the ink receiving layer. There has been proposed a wood-based decorative material provided with an ink layer made of a printing ink made of water-based resin on which printing has been performed, and a surface protective layer having a clear coating applied to the surface of the ink layer.

  According to this technology, the surface protection layer is formed by clear coating on the surface of the woody base material on which the ink layer is formed, thereby improving the gloss of the surface of the obtained woody cosmetic material and improving the woody makeup. The water resistance and heat resistance of the surface of the material can also be improved.

JP 2008-93910 A

  Here, since the ink layer of the wood-based decorative material shown in Patent Document 1 is a layer made of a water-based resin printing ink that is printed on the surface of the ink receiving layer by an ink jet printer, the printed ink layer After the surface is dried, the inside is dried.

  At this time, at the initial stage of drying, a thin film is formed on the surface of the ink layer, and as the inside of the ink advances, fine wrinkles are formed on the surface due to volatilization of the solvent from the inside and volume shrinkage inside. Or it is estimated that a void | hole etc. are formed. Since such fine wrinkles and pores can be expected to have an anchor effect on the clear-coated surface protective layer, the surface protective layer and the wood-based substrate (woody surface) It is thought that the adhesiveness of can be secured. This is the same in the case of oil-based resin printing inks.

  However, when a printing ink made of an ultraviolet curable resin is used instead of a printing ink made of a water-based or oil-based resin, the ink layer is formed at the time when the printed ink layer (resin constituting) is irradiated with ultraviolet rays. Is cured. As a result, the surface of the ink layer becomes smoother than when water-based or oil-based resin ink is used (a unique smooth surface different from others), and the surface protective layer and the woody substrate are in close contact with each other. In some cases, it was not possible to fully exhibit the properties.

  The present invention has been made in view of the above points, and the object of the present invention is to provide a resin-based surface protection on a woody base material on which an ink layer made of a resin cured by ultraviolet rays is formed on the surface. An object of the present invention is to provide a wood-based decorative material that can prevent the surface protective layer from being peeled off from the wood-based substrate even when the layer is coated.

  In view of the above problems, the wooden decorative material according to the present invention is a wooden decorative material in which a pattern is printed as an ink layer on a wooden base material on which a wooden surface is formed, and on the wooden surface, The ink layer made of the first resin cured by ultraviolet rays is formed so that a part of the wood surface is exposed, and the first resin is covered so as to cover the wood surface on which the ink layer is formed. A surface protective layer that transmits visible light mainly containing a different second resin is formed on the wood surface, and the surface protective layer is in contact with an exposed surface exposed from the ink layer of the wood surface. It is characterized by being.

  According to the present invention, since the surface protective layer is a layer that transmits visible light, the pattern of the ink layer printed on the wooden surface of the wooden base material can be visually recognized through the surface protective layer. Here, the first resin (printing ink) constituting the ink layer is a resin that adheres to the surface of the wooden base material in an uncured state and is then cured by irradiation with ultraviolet rays. Accordingly, the surface of the ink layer that is the first resin is cured without being dried, so that the surface is smoother than other inks such as printing inks made of oily and aqueous resins (other inks). Is a characteristic smooth surface that cannot be obtained by

  Here, a part of the wood surface of the wood-based substrate is exposed from the ink layer, and this exposed exposed surface is a surface having a large surface roughness derived from wood, unlike the surface of the ink layer. In the present invention, when the surface protective layer is brought into contact with the exposed wood surface (exposed surface), the adhesion force that cannot be sufficiently ensured between the ink layer that has become a smooth surface and the surface protective layer is obtained. It can be ensured between the layer and the woody base material.

  The “woody decorative material” as used in the present invention refers to a decorative material whose printed surface has a wooden surface, and the decorative material is not limited to those made of wood. Therefore, the “woody base material” as used in the present invention may be any surface on which the ink layer is formed as long as the surface is made of wood, and wood such as a veneer or a ground plate is attached to a base member such as a resin material. Including things.

  In addition, the “woody surface” in the present invention includes not only the surface of natural wood but also the surface of processed wood such as wood fiberboard. Further, in the present invention, “(the surface protective layer) is in contact with the exposed surface” means that the surface protective layer is in direct contact with the exposed surface of the wood surface exposed from the ink layer. In addition, the surface protective layer includes a case where the exposed surface is in contact with the exposed surface via an adhesive or an adhesive.

  Here, for example, as described above, the surface protective layer may be in contact with the exposed surface of the wooden base material via the pressure-sensitive adhesive. Part of the two resins is impregnated into the inside from the exposed surface.

  According to this aspect, since a part of the second resin constituting the surface protective layer is impregnated from the exposed surface to the inside of the wooden surface of the wooden substrate, the wooden substrate, the surface protective layer, It is possible to improve the adhesion.

  Here, the printing state of the ink layer is not particularly limited as long as a part of the wood surface of the wood base material is exposed and the surface protective layer can be brought into contact with the exposed surface. . However, as a more preferable aspect, the ink layer is a layer in which a plurality of ink particles made of the first resin are attached to the wooden surface so as to be separated from each other, and the ink particles are between the ink particles. An exposed surface is formed.

  According to this aspect, an exposed surface is formed between the separated ink particles, and the surface protective layer comes into contact with the exposed surface, so that the surface protective layer can be more stably adhered to the wooden substrate. it can.

  Furthermore, the wood surface of the wood-based substrate has a recess (for example, a canal) corresponding to the natural wood grain pattern derived from wood, and the ink particles are made of wood so that the ink particle is completely filled in the recess. It may be attached to the surface. However, as a more preferred embodiment, a concave portion corresponding to a natural wood grain pattern derived from wood is formed on the wooden surface, and the ink particles adhere to the wooden surface so as to leave the shape of the concave portion. The concave portion is filled with the second resin of the surface protective layer.

  According to this aspect, the ink particles adhere to the wooden surface so as to leave the concave portion formed on the wooden surface, and the remaining concave portion (the space) is filled with the second resin of the surface protective layer. The anchor effect between the woody base material and the surface protective layer can be enhanced.

  Furthermore, the surface protective layer may be formed by applying the second resin to the surface of the woody base material on which the ink layer is formed, but as a more preferable aspect, the melting point of the first resin is: The melting point of the second resin is higher than the melting point of the second resin, and the surface protective layer is a layer formed integrally with the wood base material by hot pressing.

  According to this aspect, since the surface protective layer is a layer formed integrally with the wooden base material by hot pressing, compared with the surface protective layer formed by applying the second resin, It becomes a layer closely adhered to follow the exposed surface of the woody base material and the surface of the ink layer. Further, since the melting point of the first resin is higher than the melting point of the second resin, the surface protective layer can be formed without softening (deforming) the second resin by hot pressing, and the ink layer can be spread. Is unlikely to occur.

  According to the present invention, even when a resinous surface protective layer is coated on a woody base material having an ink layer formed of a resin cured by ultraviolet rays on the surface, the surface protective layer is a woody base material. It can suppress peeling from.

It is a typical disassembled perspective view of the wooden type decorative floor material which concerns on this embodiment. It is the typical perspective view which showed the wood type decorative floor material which concerns on this embodiment. It is an expanded sectional view of the surface vicinity of the wood type decorative floor material concerning this embodiment. It is typical sectional drawing for demonstrating a printing process among the manufacturing methods of the wood type decorative flooring which concerns on this embodiment, (a) is an enlarged view of the surface vicinity of a wood type base material, (b (A) is a figure for demonstrating the state which printed uncured 1st resin as printing ink on the surface of the wooden base material shown to (a), (c) is the state shown to (b) It is a figure for demonstrating the state which irradiated and irradiated the ultraviolet-ray to the 1st resin of this. It is a figure for demonstrating the process of coat | covering a surface protective layer among the manufacturing methods of the wood type decorative flooring which concerns on this invention, (a) is the wood type base material of the state shown to FIG.4 (c). It is a figure for demonstrating the state which has arrange | positioned the sheet | seat material for surface protection layers on the surface, (b) is for demonstrating shape | molding a surface protection layer by hot press from the state shown to (a). FIG. It is the figure which showed the modification of the wood type decorative floor material which concerns on FIG.

The present embodiment will be described below with reference to the drawings.
1. About the wooden decorative flooring 1 As shown in FIG. 1 and FIG. 2, the wooden decorative flooring (woody decorative material) 1 according to the present embodiment is applied to the wooden surface 2a of the wooden base material 2, for example, wooden This is a flooring material in which a wood grain pattern different from the wood grain pattern on the surface 2a is printed as the ink layer 3. Furthermore, a surface protective layer 4 is formed on the wooden decorative flooring 1 so as to cover the surface of the wooden substrate 2 on which the ink layer 3 is formed. In the present embodiment, a flooring material is illustrated as an example of a wood-based decorative material. However, the wall material, the staircase step board, the edge material, and the like are not particularly limited. Below, the woody base material 2, the ink layer 3, and the surface protective layer 4 will be described in detail.

2. About Woody Base Material 2 In this embodiment, the woody base material 2 has four projecting plates 23 attached to the surface of a base member 21 made of a ply of multiple plies, and adjacent projecting plates 23, 23. A seam 24 is formed in the. In the present embodiment, the surface of the wood base material 2 is a wood surface 2a on which a wood grain pattern derived from the veneer 23 is formed, and the wood surface 2a of the wood base material 2 corresponds to the surface 23a of the veneer 23. An ink layer 3 to be described later is formed on the wooden surface 2a.

  A chamfer 25 is formed on the periphery of the wood surface 2 a of the wood base 2, and the chamfer 25 is formed from the surface 23 a of the protruding plate 23 to a part (side surface) of the base member 21. A male real part 22 a and a female real part 22 b are formed on the peripheral edge of the side surface of the base member 21.

  By providing the male base part 2a and the female real part 22b on the wooden base material 2 in this way, when the wooden base material 1 is laid on the floor base surface, the wooden base material 2 (the wooden base material 1). ) And the female solid part 22b of the wooden base material 2 (wooden decorative flooring material 1) adjacent thereto are engaged with each other to actually join the wooden decorative flooring materials 1 and 1 to each other. Can do.

  Here, in this embodiment, the plywood is cited as an example of the wood constituting the base member 21. For example, particle board (PB), wood fiber board (MDF, insulation board, hard board, etc.), oriented strand A wooden base member such as a board (OSB), LVL, laminated wood, or solid wood can be used. As long as the above-described protruding plate 23 can be adhered to the surface and the rigidity and strength of the base member 21 (wooden decorative flooring 1) can be ensured, the material and thickness thereof are particularly limited. It is not a thing.

  Furthermore, the base member 21 is a base member made of plywood. However, the material of the base member 21 is limited as long as the protruding plate 23 can be attached to the surface and the surface of the wood-based substrate 2 can be made the surface of wood. Is not to be done. For example, the base member 21 may be a composite base member in which a resin and wood are mixed, and is made of a resin such as polyvinyl chloride, polyurethane, or polyolefin resin (polyethylene, polypropylene, polyethylene vinyl acetate, polyvinyl alcohol, or the like). It may be a base member. Further, the base member 21 may be an inorganic fiber base member such as rock wool board or a carbon fiber base member made of carbon fiber.

  The veneer 23 is a veneer in which a natural wood grain pattern derived from the veneer 23 (wood) is formed on the surface 23a, and is a veneer used as a surface decorative material for making up the surface of the base member 21. As the material of the veneer, for example, beach, oak, maple, zelkova, walnut, china, oak, yachidamo, drill, cypress, cedar, mahogany, teak, rosewood, tochi, blackwood, shioji, elm, hippopotamus, rosewood, or You can list octane. The thickness of the protruding plate 23 is preferably in the range of 0.1 to 1.0 mm.

  In the present embodiment, the veneer 23 is used as a surface decorative material having a natural wood grain pattern derived from wood on its surface. However, for example, instead of the veneer plate 23, a ground plate made of the above-described material (with a natural wood grain pattern formed on the surface) may be used as a surface decorative material for making up the surface of the base member 21. In that case, the thickness of the grinding board is preferably in the range of 1 mm to 3 mm.

  In sticking the projecting plate 23 to the base member 21, an adhesive is applied to at least one of the surface of the base member 21 or the back surface of the projecting plate 23, and the adhesive is cured, so that the projecting plate 23 is applied to the surface of the base member 21. Glue. The above-described male real part 22a, female real part 22b, and chamfered part 25 are processed after they are bonded.

  Further, the surface of the protruding plate 23 may be colored with a colorant using a roll coater or the like before or after the protruding plate 23 is bonded to the base member 21. By performing such coloring, the wood texture of the veneer 23 can be emphasized, and the surface pattern of the wood described later can also be emphasized. Examples of the colorant include a dye colorant, a pigment colorant, and a chemical colorant.

  In the present embodiment, on the premise that the natural wood grain pattern of the veneer 23 and the unevenness of the wood surface formed accordingly remain, the colorant is impregnated from the surface 23a of the veneer 23 to the surface layer, and the surface 23a. As long as it can be colored (at least different from the color of the material), the type of coloring agent and the coloring method are not particularly limited.

  In addition, a plurality of grooves for soundproofing may be formed on the back surface of the wooden base material 2, and an impact cushioning material such as a foamed rubber sheet or a foamed resin sheet may be adhered to the paper, non-woven fabric. Further, a lining material of cloth (felt etc.) may be attached.

3. About Ink Layer 3 The ink layer 3 is a layer printed on the woody surface 2a of the woody base material 2. The ink layer 3 is a layer made of a first resin and is a resin layer cured by irradiating with ultraviolet rays. As will be described later, the ink layer 3 is formed so that a part of the woody surface 2a of the woody base material 2 is exposed.

  The first resin to be the ink layer 3 is a generally known ultraviolet curable ink, and includes an ultraviolet curable resin in which a photopolymerization initiator is added to a reactive oligomer or a reactive monomer, and a colorant. It is a configured resin and is a resin cured by irradiation with ultraviolet rays. Since the ultraviolet curable ink is used as the printing ink, the printed ink is hardly impregnated on the wooden surface 2a of the wooden substrate 2 and a clear surface pattern can be obtained.

  Here, if a part of the wood surface 2a of the wood base material 2 can be exposed, a pattern is printed on a part of the wood surface 2a of the wood base material 2 without any gaps, and other regions May be exposed. However, in the present embodiment, the ink layer 3 is formed on the entire area of the wood surface 2a of the wood base 2 so as to have a wood grain pattern different from the wood grain pattern of the protruding plate 23.

  As shown in FIG. 3 and FIG. 4 (a), the wood surface 2a of the wood base 2 has a concavo-convex shape corresponding to the natural wood grain pattern of the surface 23a of the veneer 23, and this wood surface 2a The ink layer 3 is formed by attaching a plurality of ink particles 31 made of the first resin.

  In other words, the ink layer 3 is a layer in which a plurality of ink particles 31 made of the first resin are attached so as to be separated from each other on the wood surface 2a of the wood base material 2, and the wood surface of the wood base material 2 In 2a, an exposed surface 2b exposed from the ink layer 3 is formed between the ink particles 31, 31 made of the first resin.

  Furthermore, in this embodiment, as will be apparent from the manufacturing method described later, the space of the concave portion 2c (for example, a concave portion formed by a canal) on the wooden surface 2a of the wooden substrate 2 is completely covered with the ink particles 31. Not buried. That is, the ink particles 31 are attached to the wooden surface 2a so as to leave the shape of the recess 2c. Thus, the woody surface 2a of the woody base material 2 is partially exposed from the ink layer 3 while leaving the irregular shape of the woody surface 2a. The concave portion 2c of the wood surface 2a is filled with the second resin of the surface protective layer 4.

  In this way, according to the wood type decorative flooring 1, even if the surface protective layer 4 to be described later is further covered, the exposed surface 2b exposed from the ink layer 3 has the exposed surface 2b. In addition to the natural grain pattern derived from the veneer 23, a grain pattern of the ink layer 3 different from this grain pattern is visible.

  In particular, the woody surface 2a of the woody base material 2 on which the ink layer 3 is formed has the uneven shape of the surface 23a of the protruding plate 23 formed according to the natural wood grain pattern (remains). Even if the surface protective layer 4 is formed, the wood texture of the veneer 23 can be obtained on the surface of the wooden decorative flooring 1.

  Furthermore, the wood pattern of the ink layer 3 is not considered as good as a conventional wood pattern, cracks, wrinkles, perforated skin, gold bars, sugar bars, false cores, ate, color irregularities, territory patterns, etc. Wood-specific patterns may be included. Furthermore, a saw mark pattern (rafthorn) formed when the wood is cut and processed, and a nail hole mark pattern may be included. Thereby, it can be used in combination with natural wood having a pattern similar to these printed patterns without a sense of incongruity.

4). About the surface protective layer 4 The surface protective layer 4 is a layer for protecting the woody surface 2a of the woody base material 2 on which the ink layer 3 is formed. It is formed so as to cover the wooden surface 2a. The surface protective layer 4 has light transmittance, and is made of a material having such a characteristic and having a second resin different from the first resin as a main component.

  For example, the surface protective layer 4 is a transparent resin having light transmittance such as melamine resin, polyvinyl chloride, polyurethane, polyolefin resin (polyethylene, polypropylene, polyethylene vinyl acetate, polyvinyl alcohol, etc.), polyethylene terephthalate (PET), etc. It may consist of.

  Moreover, as long as the surface protective layer 4 can transmit visible light, metal particles, craft paper, non-woven fabric, cloth, etc. may be contained, and the ink layer 3 is formed on the surface protective layer 4. An adhesive or an adhesive for adhering and sticking to the woody base material 2 may also be included.

  In the present embodiment, the surface protection layer 4 is a substantially transparent layer in which kraft paper is impregnated with melamine resin as a second resin, and a sheet material made of melamine resin-impregnated paper is formed by hot-pressure forming described later. Can be obtained.

  Here, the surface protective layer 4 is in contact (adhesion) with the exposed surface 2b exposed from the ink layer 3 in the woody surface 2a of the woody substrate 2. As described above, a part of the woody surface 2a of the woody base material 2 is exposed from the ink layer 3, and this exposed exposed surface 2b is different from the surface of the ink layer 3 and is a surface derived from wood (woody material). Surface exposed fiber). For this reason, the wood base material has an adhesive force that cannot be sufficiently secured between the ink layer 3 (specifically, the ink particles 31) having a smooth surface after the first resin is cured and the surface protective layer 4. 2 can be secured between the surface protective layer 4 and the woody base material 2 by bringing the surface protective layer 4 into contact with the exposed exposed surface 2b.

  In the present embodiment, the ink particles 31 are attached so as to be dispersed on the wood surface 2a, and an exposed surface 2b is formed between the ink particles 31, and the surface protective layer 4 is in contact with the exposed surface 2b. ing. Thereby, since the surface protective layer 4 contacts the wooden surface 2a (exposed surface 2b) uniformly, the surface protective layer 4 can be stably adhered to the wooden substrate 2.

  Furthermore, in this embodiment, the impregnation layer 32 impregnated with a part of the second resin constituting the surface protective layer 4 is formed inside the exposed surface 2b. Thereby, the adhesiveness of the woody base material 2 and the surface protective layer 4 can be improved. In particular, in the present embodiment, as described above, the ink particles 31 are attached to the wooden surface 2a so as to leave the concave portion 2c formed on the wooden surface 2a, and surface protection is performed on the remaining concave portion 2c (the space). The second resin of the layer 4 is filled. Thereby, the anchor effect of the woody base material 2 and the surface protective layer 4 can be enhanced.

  In this way, in this embodiment, even if the load and friction during walking of a pedestrian directly act on the surface protective layer by applying the wooden decorative material to the flooring, the ink layer 3 It is possible to reduce the peeling of the surface protective layer 4 from the formed woody base material 2.

5). About the manufacturing method of the wood type decorative floor material 1 Hereinafter, the manufacture of the wooden type decorative floor material 1 according to the present embodiment will be described with reference to FIGS. 4 (a) to 4 (c) and FIGS. 5 (a) and 5 (b). A method will be described.

5-1. About a printing process First, the woody base material 2 mentioned above is prepared. In this embodiment, the woody surface 2a of the woody base material 2 corresponds to the surface 23a of the veneer 23, and the woody surface 2a of the woody base material 2 has a streak-like recess 2c formed by a road pipe or the like. Is formed.

  The ink layer 3 having a wood grain pattern is printed on the woody surface 2a of such a woody base material 2. Here, since the natural wood grain pattern of the surface 23a of the projecting board 23 is formed on the surface 23a of the projecting board 23, the uneven shape of the surface 23a of the projecting board 23 formed according to this natural wood grain pattern is left. The ink layer 3 of wood different from the natural wood grain pattern on the surface 23a of the protruding plate 23 is printed so that the natural wood grain pattern can be visually recognized.

  In the present embodiment, the wood grain pattern of the ink layer 3 is obtained by photographing a surface of wood different from the surface of the protruding plate 23 as an image and printing a pattern corresponding to the photographed image (wood surface pattern). Can do. The wood grain pattern is printed using an ink jet printer (not shown). In the present embodiment, the ink of the ink jet printer includes at least an ultraviolet curable resin obtained by adding a photopolymerization initiator to a reactive oligomer or a reactive monomer, and a colorant. For example, four inks each containing four colorants of yellow, magenta, cyan, and black in the UV curable resin are prepared, and using these inks, the woody surface of the wood-based substrate 2 is prepared. A wood grain pattern is printed by forming the ink layer 3 on 2a.

  The ink jet printer contains ink used for general printing, a head that individually ejects each ink in accordance with the wood grain pattern to be printed based on the above-described image, a feeder that feeds the wood-based substrate 2, At least.

  Using such an inkjet printer, each ink serving as the first resin is ejected by a head from a direction substantially orthogonal to the wood surface 2a of the wood substrate 2 according to the wood grain pattern, and the wood system is used by the feeder. The base material 2 is fed and a wood grain pattern is printed on the woody surface 2a of the woody base material 2.

  Here, in this embodiment, unlike the prior art, fine particle size ink (uncured first resin 31 ′) is sprayed onto the wood surface 2 a of the wood base 2. Specifically, the ink droplets sprayed onto the woody surface 2a of the woody base material 2 are preferably in the range of 1 to 20 pl, and more preferably in the range of 3 to 14 pl.

  As a result, the average diameter of the ink particles 31 ′ attached to the woody surface 2 a of the woody base material 2 (the average value of the diameters of the ink particles viewed from the direction orthogonal to the plane of the woody decorative flooring material) is 15 The range is ˜150 μm (as a distribution, there are many average diameters of 40 to 60 μm). In this way, as shown in FIG. 4B, the ink particles 31 ′ made of the uncured first resin are separated from and adhered to the wood surface 2 a of the wood base 2, and the ink particles 31 ′. , 31 ′, an exposed surface 2 b exposed from the ink layer 3 (ink particles 31) is formed.

  Here, the printed ink layer 3 ′ is a layer in which ink particles 31 ′ made of uncured first resin are dispersed. Therefore, the first resin is cured by irradiating the ink layer 3 ′ with ultraviolet rays, and as shown in FIG. 4C, the first resin cured by the ultraviolet rays is applied to the wooden surface 2 a of the wooden substrate 2. The ink layer 3 in which the ink particles 31 are dispersed is formed.

  In this way, as shown in FIG. 3, the uneven surface of the surface 23a of the veneer 23 formed in accordance with the natural wood grain pattern is left on the wood surface 2a of the wood base 2 (surface 23a of the veneer 23). However, the wood grain pattern can be printed (that is, the space of the concave portion 2c of the surface 23a is not completely filled with the ink particles 31). The ink particles 31 of the ink layer 3 have a unique smooth surface as compared to the case where other inks such as aqueous or oily resin printing inks are used.

5-2. As shown in FIG. 5A, the surface protective layer 4 is formed so as to cover the ink layer 3 obtained by curing the first resin with ultraviolet rays and the exposed surface 2b of the woody base material 2. The sheet material 4A is disposed. In the present embodiment, the sheet material 4A is melamine resin impregnated paper, and a sheet material in which craft paper is impregnated with melamine resin as a second resin is used.

  In this state, as shown in FIG. 5 (b), using a hot press device 7, the sheet material 4 </ b> A is pressed against the wooden substrate 2 side while being heated, whereby the wood layer on which the ink layer 3 is formed. The surface protective layer 4 is hot-press molded on the surface of the system substrate 2.

  Here, the sheet material 4A is heated under a temperature condition that is higher than the melting point (softening point) of the melamine resin that is the second resin and lower than the melting point of the first resin that constitutes the ink particles 31 of the ink layer 3. Thereby, since the surface protection layer 4 can be shape | molded, without the ink particle 31 deform | transforming, the wood type decorative flooring 1 which hold | maintained the grain pattern of the ink layer 3 at the time of printing can be obtained.

  In this way, the surface protective layer 4 is formed integrally with the woody base material 2. The surface protective layer 4 is in contact with the exposed surface 2b exposed from the ink layer 3 in the woody surface 2a of the woody base material 2, and further from the exposed surface 2b formed between the ink particles 31 to the inside thereof. The impregnation layer 32 impregnated with a part of the second resin constituting the surface protective layer 4 is formed. Thereby, the adhesiveness of the woody base material 2 and the surface protective layer 4 is securable.

  Furthermore, since the ink particles 31 adhered to the wooden surface 2a so as to leave the shape of the concave portion 2c of the wooden base material 2, the concave resin 2c of the wooden base material 2 is filled with the second resin of the surface protective layer 4. Can do. Thereby, the anchor effect of the surface protective layer 4 with respect to the woody base material 2 can be expected.

  Here, the wood-type decorative flooring 1 according to the present embodiment shown in FIG. 3 attaches fine ink particles 31 to the woody surface 2a of the wood-based substrate 2 to thereby form the recess 2c of the wood-based substrate 2. The shape of was left.

  However, for example, the ink particles 31 </ b> A are arranged so that the ink particles 31 </ b> A of the ink layer 3 </ b> A fill the recesses 2 c of the wooden substrate 2, as in the wooden decorative flooring 1 </ b> A according to the modification of the present embodiment shown in FIG. 6. You may make it adhere to the wooden surface 2a. Even in this case, if the exposed surface 2b is formed on the wooden surface 2a of the wooden base material 2, the surface protective layer 4 comes into contact with the exposed surface 2b. 4 can be improved.

  Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. It can be changed.

  In the present embodiment, a wooden decorative flooring is obtained by sticking a veneer on the surface of a wooden substrate. However, when solid wood is used instead of plywood for the wood-based base material, a natural wood grain pattern derived from wood is formed on the surface of the solid wood, so that the veneer may be omitted.

DESCRIPTION OF SYMBOLS 1,1A: Wood type | system | group decorative flooring (woody type | system | group decorative material), 2: Wood type base material, 2a: Wood surface, 2b: Exposed surface, 2c: Recessed part, 21: Base member, 22a: Male part, 22b: Female real part, 23: protruding plate, 24: seam, 25: chamfered part, 3, 3A: ink layer, 31, 31A: ink particle, 32: impregnated layer, 4: surface protective layer, 4A: sheet material, 7: hot Press device.

Claims (5)

A wood-based decorative material in which a pattern is printed as an ink layer on a wood-based substrate on which a wooden surface is formed,
The ink layer made of the first resin cured by ultraviolet rays is formed on the wooden surface so that a part of the wooden surface is exposed,
A surface protective layer that transmits visible light based on a second resin different from the first resin is formed on the wood surface so as to cover the wood surface on which the ink layer is formed,
The wooden protective material, wherein the surface protective layer is in contact with an exposed surface exposed from the ink layer of the wooden surface.   The woody decorative material according to claim 1, wherein a part of the second resin constituting the surface protective layer is impregnated into the inside from the exposed surface.   The ink layer is a layer in which a plurality of ink particles made of the first resin are attached to the wood surface so as to be separated from each other, and the exposed surface is formed between the ink particles. The woody decorative material according to claim 1 or 2, wherein On the wooden surface, a concave portion corresponding to a natural wood grain pattern derived from wood is formed,
4. The wood-based makeup according to claim 3, wherein the ink particles adhere to the wooden surface so as to leave the shape of the recess, and the recess is filled with a second resin of the surface protective layer. Wood.   The melting point of the first resin is higher than the melting point of the second resin, and the surface protective layer is a layer formed integrally with the wood base material by hot pressing. The woody decorative material according to any one of claims 1 to 4.

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