JP2004114574A - Wood decorative sheet and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wood decorative sheet having an excellent appearance, including a transparent feel and a shining feel of the surface with wet glossiness, and such properties as to comply with application purposes. <P>SOLUTION: A translucent color-printed layer 2 is formed on the surface of a wood thin plate 1 of a thickness of about 0.15-0.6 mm, and a thin layer 3 of a colored synthetic resin is formed on the layer 2 by applying a transparent or translucent colored synthetic resin liquid to the entire surface of the plate 1 having the layer 2, and hot-pressing. The resin liquid is made to penetrate to the depth reaching the back surface of the plate 1 and solidify in order to obtain a wood decorative sheet having good flexibility for soft colored synthetic resins and a wood decorative sheet having excellent rigidity and wear resistance for hard colored synthetic resins. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a wood decorative sheet used as a surface decorative material for various furniture and fittings, and a method for producing the same.
[0002]
[Prior art]
As a method for obtaining a wood decorative sheet conventionally used as a surface decorative material for furniture or the like, a transfer paper formed by laminating a peelable synthetic resin layer and an adhesive layer on a synthetic resin film is used. Are laminated so that the adhesive layer is in contact with the surface of the thin wooden board, and then the adhesive is penetrated into the surface layer of the thin wooden board by applying heat and pressure, and at the same time, the synthetic resin layer is applied to the thin wooden board through the adhesive layer. There is known a method of transferring to a surface (for example, see Patent Document 1).
[0003]
In addition, after providing a translucent woodgrain pattern printing layer on the surface of the thin wooden board via a sealing layer, a colored transparent resin layer is layered, and thereafter, the colored transparent resin layer is protected by a transparent surface protection layer. There is also a method for producing a wood decorative sheet (for example, see Patent Document 2).
[0004]
[Patent Document 1]
Japanese Patent No. 3077340
[Patent Document 2]
JP-A-5-240007
[0005]
[Problems to be solved by the invention]
However, according to the former method for producing a wooden decorative sheet, the adhesive layer is intended to adhere the colored transparent resin layer to the surface of the wooden thin plate. Therefore, it is not possible to give a transparent feeling peculiar to the impregnated resin treatment to the thin wooden board, and it is possible to obtain only a wood decorative sheet with little change in appearance and poor design effect. Further, in the permeation of the adhesive only in the surface layer portion of the thin wooden board, even if a hot melt type resin composition is used as such an adhesive, it is not possible to impart sufficient flexibility to the thin wooden board, There is a problem that it is inferior to rapping.
[0006]
In addition, in the latter method, since only a semi-transparent woodgrain pattern printing layer is provided on the surface of the thin wooden board, even if it is possible to bring out the shine of the thin wooden board itself, it must have a high-grade appearance. It is not possible to impart a shiny feeling having a wet luster that can be produced, and because of poor flexibility, this wood-based decorative sheet has a rounded corner like a countertop such as a washbasin or a sink. When affixed to the surface of a base material that is formed on an arcuate curved surface, or when applied to the surface of a base material with an irregular cross-sectional shape with a small radius of curvature, when bending along the curved surface of the base material, the bending rigidity There is a problem that cracks and cracks may occur and cracks may occur in the printed layer, thereby significantly reducing the commercial value.
[0007]
The present invention has been made in view of the above-described problems, and the object thereof is to provide a high-quality high-quality design which is excellent in appearance by expressing a shining feeling in which the cosmetic surface has a wet gloss together with a transparent feeling. An object of the present invention is to provide a woody decorative sheet which has an appearance and has physical properties according to a purpose of use, and a method of manufacturing the woody decorative sheet.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the wood decorative sheet of the present invention has, as described in claim 1, a semi-transparent colored print layer attached to the surface of a thin wooden plate, and through the colored print layer. The transparent or translucent colored synthetic resin applied to the surface of the thin wooden board has a structure in which it penetrates and solidifies into the interior of the thin wooden board to give a transparent feeling to the thin wooden board.
[0009]
The invention according to claim 2 in the wooden decorative sheet is characterized in that a veneer veneer sliced to a thickness of 0.15 to 0.6 mm is used as the wooden thin plate, and the invention according to claim 3 is A backing sheet made of a fibrous sheet is integrally layered on the back surface of the thin wooden board via a colored adhesive.
[0010]
Furthermore, the invention according to claim 4 is characterized in that the transparent or translucent colored synthetic resin applied to the surface of the wooden thin plate penetrates and solidifies from the exposed surface to the back surface of the wooden thin plate on which the colored print layer is not provided. It is characterized by having.
[0011]
As described in claim 5, as the transparent or translucent colored synthetic resin, either one of a thermoplastic resin or a thermosetting resin, or a mixture of both, is used. As described in Item 6, it is desirable to use a hot melt type resin composition.
[0012]
The invention according to claim 7 is characterized in that one of an ultraviolet absorber and an ultraviolet scattering agent or a mixture of both is added to the transparent or translucent colored synthetic resin.
[0013]
Further, the invention according to claim 8 is characterized in that a semi-transparent colored printing layer layered on the surface of the thin wooden board is provided by gravure offset printing. It is characterized in that a transparent protective layer is provided on the entire surface of a thin wooden board provided with a translucent colored printing layer.
[0014]
The invention according to claim 10 is the method for producing a woody decorative sheet, wherein a semi-transparent colored printing layer is provided on the surface of the thin wooden board, and then the transparent or semi-transparent sheet is coated on the entire surface of the thin wooden board including the colored printing layer. By applying a transparent colored synthetic resin liquid and applying pressure and heating, the colored synthetic resin liquid is allowed to penetrate from the exposed surface of the wooden thin plate on which the colored print layer is not provided to the interior of the wooden thin plate, and then cooled. Thus, the synthetic resin liquid permeated into the thin wooden board is solidified.
[0015]
In the method for manufacturing a woody decorative sheet, the invention according to claim 11 is characterized in that, before providing a translucent colored printing layer on the surface of the thin wooden board, the surface of the thin wooden board is subjected to an opening process by brushing. Features.
[0016]
Furthermore, in the invention according to claim 12, in the invention according to claim 10 or 11, the transparent or translucent colored synthetic resin is either a thermoplastic resin or a thermosetting resin, or both. It is a mixture, and after applying this colored synthetic resin liquid to the surface of a wooden thin plate provided with a translucent colored printed layer, by heating under pressure, the colored synthetic resin liquid is applied from the exposed surface to the back surface of the wooden thin plate. It is characterized in that it penetrates until reaching, and then is cooled to solidify the colored synthetic resin liquid.
[0017]
[Action]
Since the transparent or translucent colored synthetic resin penetrates and solidifies into the wooden thin plate, the entire wooden thin plate is in a so-called WPC (Wood Plastic Combination) state, and the sense of transparency of the wooden thin plate increases. At the same time, since a part of the transparent or translucent colored synthetic resin covers the surface of the translucent colored printing layer which is layered on the surface of the wooden thin plate, the wooden thin plate exerts a sense of transparency. In combination with this, the surface expresses a shining feeling having a wet gloss, and the colored printing layer exhibits a deep three-dimensional effect. In addition, since the transparent or translucent synthetic resin that has penetrated and solidified into the thin wooden plate is arbitrarily colored, the color of the synthetic resin has an inflection depending on the amount of penetration into the thin wooden plate. Are generated from the inside of the thin wooden board, and together with the colored printed layer, give a deeper appearance.
[0018]
Further, the wooden decorative sheet has physical properties according to the type of the synthetic resin that has permeated and solidified into the thin wooden plate. That is, when the synthetic resin is soft, the thin wooden board is provided with flexibility and flexibility in combination with the extremely thin thickness of 0.15 to 0.6 mm without causing cracks or cracks. Furthermore, it is possible to wrap the surface of a product base material having an irregular shape or a curved surface shape with a small radius of curvature without causing cracks in the colored printed layer on the surface. On the other hand, when the synthetic resin is hard, the wooden thin plate is provided with excellent rigidity and abrasion resistance, and can be optimally used as a flat flooring or a countertop surface decorative sheet which requires scratch resistance. it can.
[0019]
In the case of producing the wood decorative sheet, before providing a translucent colored printing layer on the surface of the thin wooden board, by performing an opening process by brushing on the surface of the thin wooden board, a floating effect is obtained. A three-dimensional effect can be imparted, and the synthetic resin liquid easily penetrates into the thin wooden plate, so that the effect of improving design and physical properties can be further improved.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 shows an example of a woody decorative sheet A of the present invention. The woody decorative sheet A has a semi-transparent colored printing layer 2 on the surface of a thin wooden board 1. And a transparent or translucent thin colored synthetic resin layer 3 is provided on the surface of the printing layer 2. Further, the same transparent or translucent transparent synthetic resin layer 3 forming the colored synthetic resin layer 3 is provided. The colored synthetic resin has penetrated and solidified into the interior of the thin wooden board 1, and the thin wooden board 1 has been converted into a so-called WPC to give a sense of transparency. A backing sheet 4 made of a thin fibrous sheet such as Japanese paper or a synthetic resin nonwoven fabric is laminated on the back surface of the thin wooden board 1 with a coloring adhesive 5. Reference numeral 6 denotes a transparent resin protective layer which is layered on the entire surface of the thin wooden board 1 on which the print layer 2 is provided.
[0021]
The thin wooden board 1 is a veneer veneer obtained by slicing wood to a thickness of 0.15 to 0.6 mm, preferably 0.2 to 0.5 mm. In order to be processed into a long sheet, it is preferable that the sheet is connected to a bad joint or a finger joint to form a strip-shaped long sheet having a constant width. At this time, the backing sheet 4 made of the fibrous sheet is integrally laminated and adhered to the back surface of the long sheet via an adhesive. If the thickness of the thin wooden board 1 is 0.2 mm or less, finger joints are difficult, and the wooden decorative sheet A cannot be given a three-dimensional effect. The flexibility of the thin plate 1 is impaired, and it becomes difficult to attach or wrap the wood decorative sheet A to the product base material surface having a large radius of curvature. The species of the thin wooden board 1 is not particularly limited, but is preferably inexpensive and easily available.
[0022]
Furthermore, the above-mentioned thin wooden board 1 is usually subjected to a grinding process for adjusting the thickness, and together with this grinding process, the surface thereof is subjected to an opening process by a brushing process. In this opening process, using a device having a winding and rewinding mechanism, the long sheet-like thin wooden sheet 1 wound into a roll is unwound and arranged at the intermediate portion on the winding mechanism side. This is done with a wire brush installed. The degree of opening is adjusted by adjusting the wire diameter, stiffness, and contact pressure of the wire brush according to the type and thickness of the thin wooden board 1 to be treated. This wire brush is made of stainless steel, brass, or nylon, and has a wire diameter of 0.1 to 1.0 mm and a bristle length of 10 to 80 mm.
[0023]
In addition, when the lashing process is performed with a wire brush, the surface of the thin wooden board 1 is slightly fuzzy, and therefore, it is possible to dispose a grid brush on the rear side of the wire brush and remove the fuzz. In some cases, the grinding process for adjusting the thickness of the thin wooden board 1 may be omitted.
[0024]
As shown in FIG. 2, a semi-transparent colored print layer 2 is applied to the surface of the wood thin plate 1 to which the backing sheet 4 is adhered to the back surface as described above, and then the wood thin plate 1 including the colored print layer 2 is applied. A transparent or translucent colored synthetic resin liquid is applied to the entire surface of the wooden sheet 1 and heated under pressure, so that the colored synthetic resin is introduced into the wooden sheet 1 from the surface portion of the wooden sheet 1 on which the colored printed layer 2 is not provided. By infiltrating the liquid and then cooling, the colored synthetic resin liquid applied to the surface of the colored print layer 2 is solidified to provide a transparent or translucent thin colored synthetic resin layer 3, and the inside of the wooden thin plate 1. The wooden synthetic sheet A is produced by solidifying the colored synthetic resin liquid that has permeated into the WPC to convert the thin wooden board 1 into WPC.
[0025]
In the method for producing the woody decorative sheet A, the semi-transparent colored printing layer 2 to be layered on the surface of the thin wooden board 1 is a picture printing layer or a semi-transparent layer by a known method such as gravure printing or roll coating. It is formed on the ink layer, but may be formed by laminating these layers. Further, in order to match the color tone between the colored print layer 2 and the wooden thin plate 1, the wooden thin plate 1 may be subjected to a bleaching process, a coloring process by dyeing, wiping, or the like.
[0026]
Further, the synthetic resin layer 3 is formed on the surface of the printing layer 2 and the transparent or translucent synthetic resin which permeates and solidifies as a resin liquid inside the thin wooden board 1 is a thermoplastic resin or a thermosetting resin. Either one of the resins or a mixture thereof can be used. The thermosetting resin is a polyester resin, a polyurethane resin, an epoxy resin, a diallyl phthalate resin, or the like. Not only a prepolymer or polymer of these resins but also an oligomer may be used.
[0027]
In order to obtain the woody decorative sheet A having flexibility, it is desirable that the synthetic resin liquid that has permeated the thin wooden board 1 becomes a plasticized resin after solidification. In order to impart plasticity to the thermosetting resin itself, Adjust the reaction conditions or use a synthetic resin to which a plasticizer is added.
[0028]
On the other hand, the thermoplastic resin is a synthetic resin such as a polyolefin-based, polyester-based, ethylene-vinyl acetate copolymer, polyamide-based, or urethane-based resin, and has adhesiveness with a solvent-dried or hot-melt-type resin composition. It is desirable to use a synthetic resin modified to have.
[0029]
Even when this thermoplastic resin is used, the wood decorative sheet A can be imparted with appropriate flexibility and appropriate hardness. Such a synthetic resin can be a polyester hot melt or a moisture-curable urethane hot resin. There are cross-linking type hot melt adhesives such as melts and polyamide hot melts, and such hot melt adhesives are used as the synthetic resin 3 in consideration of VOC (volatile organic compound) in a working environment. Is preferred.
[0030]
In this case, the viscosity of the liquid hot-melt adhesive is preferably in the range of 500 to 60,000 mPa · s, and more preferably in the range of 1,000 to 40,000 mPa · s at a temperature of 80 to 180 ° C. When the viscosity is less than 500 mPa · s, the workability is poor, and when the viscosity exceeds 60,000 mPa · s, the permeability into the interior of the thin wooden board 1 becomes poor, and the transparency of the thin wooden board 1 becomes insufficient, resulting in poor design. descend.
[0031]
Further, an ultraviolet absorber or an ultraviolet scattering agent is added to the synthetic resin in order to prevent fading of the thin wooden board 1. Since the effect of ultraviolet absorption and scattering is related to the amount of addition to the synthetic resin and the film thickness of the synthetic resin, 0.05 to 2.0 g / m ² It is preferable to add it to the synthetic resin so as to be applied in a ratio. The coating amount is 0.05 g / m ² In the following, the effect of preventing the thin wooden board 1 from fading against ultraviolet rays is weakened, and is 2.0 g / m2. ² Above, the cost becomes high and becomes impractical.
[0032]
Examples of the ultraviolet absorber include paraaminobenzoic acid such as octyl paradimethylaminobenzoate, benzophenone derivatives such as oxybenzone, methoxycinnamic acid derivatives, salicylic acid derivatives, and inorganic cerium oxide. And fine particles of titanium oxide and zinc oxide can be used. However, in order to maintain the transparency of the synthetic resin layer 3 formed thinly on the surface of the printing layer 2 or the thin wooden board 1, a transparent ultraviolet scattering agent such as an ultrafine particle type or a transparent titanium oxide is used. It is desirable to select and use.
[0033]
In addition, a synthetic resin such as the hot-melt adhesive, if necessary, an organic or inorganic pigment, a dye, a coloring agent such as a glittering pigment, an extender, a modifier such as rosin, an appropriate amount of wax, They may be mixed. When the wooden decorative sheet A is manufactured by permeating and solidifying the hot-melt adhesive mixed and added with such a coloring agent, a modifier, a wax, etc. into the wooden thin plate 1, the obtained wooden decorative sheet is obtained. A can exhibit a shiny sensation having a wet gloss from inside the thin wooden plate, and can further improve the wooden texture.
[0034]
In order to allow a synthetic resin liquid such as a hot-melt type adhesive to penetrate into the wooden thin plate 1 provided with the colored printing layer 2 on the surface, first, the surface of the wooden thin plate 1 is applied by an application such as a curtain spray method or a surface coating method. It is applied so as to have a predetermined thickness. The thickness of the applied synthetic resin layer is slightly different depending on the species of the wooden thin plate 1 into which the synthetic resin liquid is penetrated, but is 1/20 to 1/2 of the thickness of the wooden thin plate 1, preferably 1/10 to 1/3. Thickness range.
[0035]
As described above, the thickness of the synthetic resin layer such as a hot-melt adhesive applied to the surface of the thin wooden board 1 was set to 1/10 to 1/3 of the thickness of the thin wooden board 1 to heat-press the applied surface. Synthetic resin penetrates and solidifies the back of the thin wooden board 1 to the back of the thin wooden board 1 to give a sense of transparency. If the applied thickness of the synthetic resin liquid is less than 1/20, the amount of resin that penetrates deep into the thin wooden board 1 is insufficient, so that the transparency of the thin wooden board 1 is reduced and the reinforcing effect of the resin on the thin wooden board 1 is also reduced. If the coating amount is 1/3 or more, a large amount of resin remains on the surface of the thin wooden board 1, and the resin layer gives a feeling of sheet, which is not preferable.
[0036]
When a hot-melt adhesive is used as the synthetic resin that penetrates into the thin wooden board 1, the hot-melt adhesive is extruded without using a coating means and is 1/10 to 1/3 of the thin wooden board 1. Is formed into a film having a thickness of 1 mm, and the hot-melt adhesive in the form of a film is interposed between the thin wooden board 1 and a release paper such as a resin-coated paper such as polypropylene. The hot-melt type adhesive may be melted by hot pressing and permeate into the thin wooden board 1. As the hot-pressing means, an apparatus such as a roll laminator having a hot-cold function or a flat-plate press can be used. The pressing force varies depending on the type of the woody thin plate 1, but the surface pressure is 2 to 20 kg / cm. ² , Preferably 5 to 15 kg / cm ² Is desirable.
[0037]
In this way, after the synthetic resin is permeated and solidified therein, a transparent resin surface protection layer 6 is provided on the entire surface of the thin wooden board 1 on which the colored printed layer 2 is provided to obtain a wood decorative sheet A. It is. Next, specific examples of the present invention will be described.
[0038]
Embodiment 1
A eucalyptus veneer sliced to a thickness of 0.22 mm is vertically spliced with a finger joint or the like to form a continuous sheet, and then a backing of this sheet is lined with a polyester-based nonwoven fabric via a vinyl acetate adhesive to make a thin wooden sheet. A sheet was prepared. Next, the thin wooden sheet is sent out from a winding roll at a feeding speed of 10 m / min, and a surface of the thin wooden sheet is subjected to an opening process by a stainless steel wire brush having a wire diameter of 0.15 mm provided on the way. gave. At this time, the rotation speed of the wire brush was 1,000 times / minute. Subsequent to the opening process, the surface of the thin wooden sheet was subjected to wiping coating, and thereafter, a picture ink layer having a wood grain pattern was provided on the surface of the thin wooden sheet by gravure printing to produce a colored thin wooden sheet.
[0039]
Next, the discharge temperature was 140 ° C., and the coating amount was 100 g / m 2. ² An EVA hot-melt adhesive [UC035, melt viscosity 37900 mPa · s (140 ° C.); manufactured by Aron Evergrip Limited] was applied to the surface of the thin wooden sheet by a heatable die coater set in the above. The thickness of this hot melt type adhesive layer was 95 μm. Subsequently, a release sheet is superimposed on the hot-melt adhesive layer, heated and pressed (linear pressure: 5 kg / cm) with a heat roller at 120 ° C. from the release sheet, and then cooled by a cooling roller. The mold adhesive layer was permeated into the thin wooden sheet and solidified. At this time, the hot-melt adhesive was seeping out from the back surface of the thin wooden sheet.
[0040]
Subsequently, after peeling the release sheet from the surface of the thin wooden sheet, a wood-based decorative sheet is obtained by providing a soft urethane-based surface protective layer thicker than the thickness of the colored printed layer 3 on the entire surface of the thin wooden sheet. Was. When this wooden decorative sheet was wrapped using a normal lapping machine into a member having a curved surface shape with a radius of curvature of 10 mm at the corner, there was no crack on the surface of the corner of the wrapping member, and very A woody, shiny product was obtained.
[0041]
Embodiment 2
After making a continuous sheet by vertically joining the mangashiro veneer sliced to a thickness of 0.5 mm with a finger joint or the like, the back of this sheet is lined with a polyester-based nonwoven fabric via a vinyl acetate adhesive, A thin wooden sheet was produced. Subsequently, after applying wiping coating to the surface of the thin wooden sheet, a two-color wood pattern picture ink layer was sequentially printed by gravure printing to produce a colored thin wooden sheet.
[0042]
Next, the discharge temperature was 100 ° C., and the coating amount was 80 g / m 2. ² A urethane-based hot-melt adhesive [Aronmelt PES120H Shore hardness (D47); manufactured by Toa Gosei Co., Ltd.] was applied to the surface of the thin wooden sheet by a heatable die coater set in the above. The thickness of this hot melt type adhesive was 75 μm. Subsequently, a release sheet is superimposed on the hot-melt adhesive layer, heated and pressed (linear pressure: 5 kg / cm) with a heat roller at 120 ° C. from the release sheet, and then cooled by a cooling roller. The melt-type adhesive layer was permeated into the thin wooden sheet and solidified. At this time, the hot-melt adhesive was seeping out from the back surface of the thin wooden sheet.
[0043]
Subsequently, after peeling the release sheet from the surface of the thin wooden sheet, a wooden protective sheet is obtained by providing a surface protective layer of a hard coat type UV cured coating film having a pencil hardness of 3H on the entire surface of the thin wooden sheet. Was. The thickness of the surface protective layer is larger than the thickness of the colored print layer 3 and is formed on a flat surface. The wood decorative sheet thus obtained was adhered to the surface of a medium-density fiberboard (MDF) having a thickness of 6 mm with a vinyl acetate adhesive to obtain a floor material. The surface hardness of the floor material was 3H in pencil hardness. And excellent in design.
[0044]
[Comparative Example 1]
As in Example 1, eucalyptus veneer sliced to a thickness of 0.22 mm was longitudinally joined by a finger joint or the like to form a continuous sheet, and then a polyester-based nonwoven fabric was attached to the back of this sheet via a vinyl acetate adhesive. Was backed to produce a thin wooden sheet. Next, after wiping coating is performed on the surface of the thin wooden sheet, the discharge temperature is 140 ° C., and the coating amount is 100 g / m 2. ² An EVA hot-melt adhesive [UC035, melt viscosity 37900 mPa · s (140 ° C.); manufactured by Aron Evergrip Limited] was applied to the surface of the thin wooden sheet by a heatable die coater set in the above. The thickness of this hot melt type adhesive layer was 10 μm.
[0045]
Subsequently, a release sheet is superimposed on the hot-melt adhesive layer, heated and pressed (linear pressure: 5 kg / cm) with a heat roller at 120 ° C. from the release sheet, and then cooled by a cooling roller. The mold adhesive was permeated and solidified in the thin wooden sheet, but only the hot melt type adhesive permeated and solidified only in the surface layer of the thin wooden sheet. No exudation of the melt type adhesive was observed.
[0046]
Next, a two-color woodgrain pattern ink layer is sequentially printed by gravure printing on the surface of the thin wood sheet that has been infiltrated and solidified with the hot melt adhesive, and then a soft urethane surface protective layer is provided. Thus, a woody decorative sheet was obtained.
[0047]
As shown in FIG. 3, the thus obtained wooden decorative sheet has a synthetic resin infiltrated and solidified by the hot-melt type adhesive in the thin wooden sheet 1 ′ and solidified, and the solidified portion 3 ′ has only a surface layer, and is transparent. The feeling was poor and the flexibility was insufficient. In the figure, 2 'is a printing layer, 4' is a backing sheet, 5 'is an adhesive layer for bonding the backing sheet 4' to the back surface of the backing sheet 1 ', and 6' is a thin wooden sheet 1 '. It is a transparent resin protective layer layered on the entire surface.
[0048]
【The invention's effect】
As described above, according to the present invention, a translucent colored printing layer is layered on the surface of the thin wooden board, and the transparent or translucent coloring applied to the surface of the thin wooden board via the colored printing layer. Since the synthetic resin penetrates and solidifies into the interior of the thin wooden board, the entire thin wooden board can be made into a WPC to increase the transparency and a part of the transparent or translucent colored synthetic resin. Is coated on the surface of the translucent colored printing layer that is layered on the surface of the wooden thin plate, and in combination with the wooden thin plate that exhibits a transparent feeling, the surface has a shining feeling with wet gloss In addition, it is possible to provide a wood decorative sheet which can give a deep three-dimensional effect to the colored print layer and exhibit an excellent appearance.
[0049]
Furthermore, since the transparent or translucent synthetic resin that has penetrated and solidified into the interior of the thin wooden board is arbitrarily colored, the inside of the thin wooden board depends on the amount of penetration into the interior of the thin wooden board. From the color print layer, and a wood decorative sheet having a deeper appearance in combination with the colored print layer can be obtained.
[0050]
In addition, when the synthetic resin penetrated and solidified in the thin wooden sheet is soft, the thickness of the thin wooden sheet is 0.15 to 0.6 mm. The wood decorative sheet can be imparted to the surface of a product substrate having a deformed shape or a curved surface shape with a small radius of curvature without causing cracks or cracks, and furthermore, it can be applied to a colored printed layer on the surface. Lapping can be performed without causing cracks. On the other hand, when the synthetic resin is hard, it can impart excellent rigidity and abrasion resistance to a thin wooden board, and is optimally used as a flat flooring or countertop surface decorative sheet requiring scratch resistance. Can be used. Therefore, it is possible to provide a wooden decorative sheet having physical properties corresponding to the type of the synthetic resin to be permeated and solidified in the thin wooden plate.
[0051]
Furthermore, in the case of manufacturing such a wood decorative sheet, before providing a translucent colored printing layer on the surface of the thin wooden board, the surface of the thin wooden board is subjected to a meshing treatment by brushing treatment, so that it is floated. The three-dimensional effect can be imparted by the construction effect, and the synthetic resin liquid easily penetrates into the interior of the thin wooden board, so that the effect of improving the design and physical properties can be further improved. As described above, in combination with the coloring synthetic resin layer being adhered to the surface of the printing layer, the shine of the wood decorative sheet is further reflected together with the permeated and solidified synthetic resin, and the design property is improved.
[0052]
In addition, when the backing sheet is bonded to the back surface of the thin wooden board, by bonding with a coloring adhesive, the colored layer appears on the surface through the transparent thin wooden board, and the colored layer permeates and solidifies into the thin wooden board. By adjusting the color tone of the resin or the color tone of the printed layer on the surface, it is possible to obtain a woody decorative sheet having a more excellent appearance in design.
[Brief description of the drawings]
FIG. 1 is a simplified enlarged longitudinal sectional view of a part of a wooden decorative sheet,
FIG. 2 is a simplified enlarged longitudinal sectional view showing a state in which a colored printing layer is provided on the surface of a thin wooden board,
FIG. 3 is a simplified enlarged longitudinal sectional view of a part of a wood decorative sheet of a comparative example.
[Explanation of symbols]
1 wooden thin plate
2 Colored printing layer
3 colored synthetic resin layer
4 Backing sheet
6 Surface protective layer
A wood decorative sheet

Claims (12)

A translucent colored printing layer is layered on the surface of the thin wooden board, and the transparent or translucent colored synthetic resin applied to the surface of the thin wooden board through the colored printing layer penetrates into the interior of the thin wooden board. A wooden decorative sheet, which solidifies to give a transparent feeling to a thin wooden plate. The wood decorative sheet according to claim 1, wherein the thin wooden board is a veneer veneer sliced to a thickness of 0.15 to 0.6 mm. The wood decorative sheet according to claim 1 or 2, wherein a backing sheet made of a fibrous sheet is integrally layered on the back surface of the thin wooden board via a coloring adhesive. The transparent or translucent colored synthetic resin applied to the surface of the thin wooden board penetrates and solidifies from the exposed surface to the back face of the thin wooden board on which the colored print layer is not provided. The wood decorative sheet according to claim 2 or 3. The wooden decorative sheet according to claim 1, wherein the transparent or translucent colored synthetic resin is one of a thermoplastic resin and a thermosetting resin, or a mixture of both. The woody decorative sheet according to claim 5, wherein the thermoplastic resin is a hot-melt type resin composition. 6. The transparent synthetic resin or the translucent colored synthetic resin to which one of an ultraviolet absorber and an ultraviolet scattering agent, or a mixture of both, is added. 6. The wood decorative sheet according to 6. The woody decorative sheet according to claim 1, wherein the translucent colored print layer is printed by gravure offset printing. The woody decorative sheet according to any one of claims 1 to 8, wherein a transparent protective layer is provided on the entire surface of the thin wooden board provided with the translucent colored printing layer. After providing a translucent colored printing layer on the surface of the thin wooden board, a transparent or translucent colored synthetic resin liquid is applied to the entire surface of the thin wooden board including the colored printing layer, and the color is applied by heating under pressure. It is characterized in that the synthetic resin liquid permeates into the interior of the wooden thin plate from the exposed surface of the wooden thin plate on which the colored printing layer is not provided, and then is cooled to solidify the synthetic resin liquid permeated into the wooden thin plate. A method for producing a woody decorative sheet. The method for producing a woody decorative sheet according to claim 10, wherein the surface of the thin wooden board is subjected to a meshing treatment by brushing before providing a translucent colored printing layer on the surface of the thin wooden board. The transparent or translucent colored synthetic resin is either a thermoplastic resin or a thermosetting resin, or a mixture of both, and the colored synthetic resin liquid is applied to the surface of a thin wooden board provided with a translucent colored printing layer. After being applied, the colored synthetic resin liquid is permeated from the exposed surface to the back surface of the thin wooden board by heating under pressure, and then cooled to solidify the colored synthetic resin liquid. The method for producing a woody decorative sheet according to claim 10 or 11.

Images