JP2013018231A - Decorative sheet and decorative plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative sheet which has excellent designability by high matting property and high jet-black property of a conduit part and also has excellent fingerprint resistance, that is inconspicuous in adhered fingerprint.SOLUTION: The top of a base material having a woodgrain pattern has a conduit layer and a transparent protective layer for sheathing the conduit layer, wherein the conduit layer is a layer consisting of a conduit ink with the oil absorbency of 45-100 mg/100 cm, and the transparent protective layer is formed by a transparent resin coat agent having a silica particle, the average particle diameter of which is 2-8 μm. The decorative sheet has the matting property and the jet-black property, and also has good fingerprint resistance, that is inconspicuous in adhered fingerprint.

Description

  The present invention relates to a decorative sheet that is excellent in mat feeling and jet blackness of a conduit portion, and in which an attached fingerprint is not noticeable, and a decorative board using the decorative sheet.

  In the residential and non-residential fields, decorative materials with wood grain designs are widely used. The decorative material here refers to a decorative sheet having a grain design by gravure printing or the like, and a decorative board in which the decorative sheet is bonded to a woody base material or a non-combustible base material. In general, a wood grain decorative sheet or a decorative board on which this is laminated is used as an interior wallpaper or a fitting storage member. However, in the market, a design having a texture close to that of natural wood is desired. In particular, doors such as storage and kitchens are required to have a simple handle-less design, and an increasing number of push-open systems are used in which a person directly presses a face material to open and close the door. Even if the door is a door with a handle, the handle is used when opening the door, but the door surface is often pushed directly when closing the door. Therefore, the decorative material used for these is required not only to have a high design property but also to have a performance that makes the fingerprints less noticeable and easy to wipe off even if a human finger touches them directly.

  Various investigations have been made on wood-printed decorative sheets for industrial products so as to bring them closer to the texture of natural wood. For example, there is a gloss matting method that gives a difference in gloss between the conduit part of the wood and the other parts visually, and a technique that reveals physical irregularities by embossing plate or raised printing, etc. A technique combining these visual embossing and physical embossing is also disclosed.

  As such a decorative sheet, for example, in a wood grain printing decorative sheet, a two-component curable urethane-based high mat transparent protective layer is applied on a two-component curable urethane-based conduit ink, and a transparent resin is applied to a portion other than the conduit portion. There has been disclosed a decorative sheet that is printed while being raised to provide a feeling of unevenness and whose design is physically improved (see Patent Document 1). In addition, since it is difficult to reveal the design of natural eyes simply by applying physical unevenness, in the examples, a matting agent is added to the protective coating layer, so that the gloss mat difference with the raised ink layer is increased. The visual effect by is also given.

  However, with this method, the two-part curable urethane for the transparent protective layer is less likely to permeate the two-part curable urethane for the conduit ink. As a result, the coating thickness of the transparent protective layer becomes thicker and is blended in the transparent protective layer. In some cases, white turbidity may occur due to the effect of the matting agent. In this case, even though physical unevenness and a visual gloss matte feeling were obtained, the design was insufficient due to lack of jet blackness in the conduit portion.

  Further, a decorative sheet is disclosed in which a two-component curable urethane-based high-mat transparent protective layer is provided on a one-component nitrified cotton-based conduit ink. It is disclosed that the decorative sheet has good surface characteristics such as wear resistance and has a natural wood texture, but the decorative sheet of the configuration has a fingerprint attached when a human finger comes into contact with the decorative sheet. It was conspicuous and difficult to wipe off. In particular, when the wettability of the oil and fat component with respect to the transparent protective layer resin is large, or when the particle size of the matting agent contained in the transparent protective layer resin is too small, the fingerprint attached to the conduit portion is easily noticeable, and There was a problem that the attached fingerprint was difficult to wipe off.

Japanese Patent Laid-Open No. 9-17495 JP 2007-1111928 A

  As described above, the conventional decorative sheet does not have high design properties due to good matting properties and jet blackness of the conduit portion and fingerprint resistance. In addition, simply improving the mat property and jet black property of the conduit portion has a problem that the attached fingerprint is easily noticeable and a good design property cannot be obtained.

  The problem to be solved by the present invention is to provide a decorative sheet having excellent design properties due to the high matte property and high jet blackness of the conduit portion, and having excellent fingerprint resistance that prevents attached fingerprints from being noticeable. is there.

  The wood grain decorative sheet of the present invention uses a transparent resin ink (transparent resin coating agent) containing silica particles having a large particle size as a transparent protective layer, and uses a conduit layer in which the transparent resin coating agent permeates as a conduit layer. By doing so, while having a high matte property and jet blackness, the attached fingerprint is less noticeable and the fingerprint resistance is improved.

That is, the present invention is a decorative sheet having at least a conduit layer and a transparent protective layer covering the conduit layer on a substrate having a wood grain pattern, wherein the conduit layer has a conduit ink on a polyethylene terephthalate film. Layer composed of conduit ink having a thickness of 5.5 μm and an oil absorption measured by using oleic acid according to JIS C-2300 oil absorption test (Cobb modified method) of 45 to 100 mg / 100 cm ² The transparent protective layer is formed of a transparent resin coating agent containing silica particles, and provides a decorative sheet having an average particle diameter of 2 to 8 μm.

  The wood grain decorative sheet of the present invention combines the high matte property, jet blackness and fingerprint resistance performance of the conduit portion, and imparts fingerprint resistance performance while having high design properties close to the texture of natural wood. Therefore, it can be suitably used for interior materials such as face materials for storage fittings.

It is a schematic sectional drawing which shows an example of the decorative sheet of this invention. It is a schematic sectional drawing which shows an example of the decorative sheet of this invention which has a raised layer. It is a schematic sectional drawing which shows an example of the decorative sheet of this invention. It is a schematic sectional drawing which shows an example of the decorative sheet of this invention which has a raised layer.

The decorative sheet of the present invention has at least a conduit layer and a transparent protective layer covering the conduit layer on a base material, and the conduit layer is formed by laminating conduit ink with a thickness of 5.5 μm on a polyethylene terephthalate film. And a layer made of conduit ink having an oil absorption of 45 to 100 mg / 100 cm ² measured using oleic acid in accordance with the oil absorption test (Cobb modified method) of JIS C-2300. The decorative sheet is formed from a transparent resin coat layer containing silica particles having an average particle diameter of 2 to 8 μm.

(Base material)
As the base material used in the present invention, those for general interior decorative sheets can be used, for example, paper sheets such as thin paper, plain paper, reinforced paper, resin-impregnated paper, titanium paper, polyethylene terephthalate sheet. Further, a resin sheet such as a glycol-modified polyethylene terephthalate sheet (PETG sheet), a polyvinyl chloride sheet, a polyethylene sheet, an acrylonitrile butadiene styrene sheet, a polypropylene sheet, or a composite sheet thereof can be used. In the decorative sheet of the present invention, among these, by using a composite sheet in which a resin sheet or a paper sheet and a resin sheet are laminated, the surface on which the conduit layer is laminated becomes smooth, and it is easy to ensure good design. Therefore, it is preferable. Each sheet constituting the composite sheet can be bonded through an adhesive layer, and the adhesive layer should be made of a known adhesive such as urethane adhesive, acrylic adhesive, epoxy adhesive, etc. Can do. In the case of a composite sheet, the surface on which various printing layers (conduit layer, transparent protective layer) are provided is preferably a resin sheet surface.
Moreover, about each base material, in order to raise adhesiveness with printing ink, you may give the surface the corona treatment and the primer treatment.

  In the present invention, a decorative sheet having a suitable wood grain pattern can be obtained by using a base material having a wood grain pattern as the base material. The wood grain pattern is provided by printing colored ink on the paper sheet or resin sheet surface. In addition, if necessary, a concealing ink may be applied to the surface of the paper sheet or resin sheet, and a wood grain pattern with colored ink may be printed thereon. Since it becomes advantageous on a process, it is preferable.

  For the color ink and the concealment ink used in the present invention, those for general interior decorative sheets can be used. For example, nitrified cotton resin, vinyl acetate vinyl chloride copolymer resin, urethane resin, acrylic resin Resin, polyamide resin, cellulose acetate resin, butyral resin, etc. can be used, and a mixed system thereof may be used. Further, the ink may be a one-component type or a two-component curable type crosslinked with a curing agent, and may be an aqueous or solvent-based ink. Among these, a porous one-part cellulose type having good permeability and a one-part aqueous acrylic type that can be easily applied are preferable.

Although the thickness of the base material is not particularly limited, it is preferable that the thickness of the sheet is 30 to 200 μm because post-processing is easy. Moreover, when providing a grain pattern by the grain pattern printing layer by coloring ink, it is preferable that the grain pattern printing layer is provided by the thickness of about 5-10 micrometers on the various sheets of the said thickness. Moreover, it is preferable that it is 5-10 g / m < ² > as an application quantity of the ink for woodgrain pattern printing layers.

(Conduit layer)
The conduit layer used in the present invention has an oil absorption measured in the following oil absorption test of 45 to 100 mg / 100 cm ² , preferably 45 to 80 mg / 100 cm ² , more preferably 45 to 60 mg / 100 cm ^2. It is a layer made of ink. The component of the matting agent (silica particles) contained in the transparent resin coating agent used for the transparent protective layer has an effect of matting the coating film, but if the film thickness is too large, the coating film becomes cloudy. In particular, in gravure printing for building materials, if the amount of the transparent resin coating agent is adjusted to be small when forming the transparent protective layer, problems such as poor transfer of the transparent resin coating agent and poor leveling may occur. Is preferably 5.5 to 8 mg / 100 cm ² (dry). However, when such a coating amount is laminated on the conduit layer as it is, the transparent protective layer becomes cloudy due to the influence of the matting agent, and the design of the conduit portion is greatly impaired. In particular, when imparting good design properties, when the jet blackness of the conduit layer is increased, the cloudiness is remarkably generated.

  In the present invention, the thickness of the transparent protective layer remaining on the surface layer is reduced by using the conduit layer as a component so that the transparent resin coating agent soaks appropriately, and the transparency of the transparent protective layer is improved accordingly. It is possible to obtain the jetness inherent in conduit ink while having excellent matte properties and fingerprint resistance. In addition, since the mat property of a conduit | pipe part is influenced by the mat agent arranged on the very surface of a transparent protective coat layer, it is hardly influenced by the film thickness of a transparent protective coat layer.

The oil absorption of the conduit layer is determined by laminating conduit ink with a thickness of 5.5 μm (or coating amount 6 g / m ² (dry)) on a polyethylene terephthalate film, and the oil absorption test of JIS C-2300 (Cobb modified method). The oil absorption is measured using oleic acid according to the above, and is measured in detail by the following method.

A sample piece obtained by laminating conduit ink with a thickness of 5.5 μm on a polyethylene terephthalate film is prepared, and the mass of the sample piece is measured. Injecting oleic acid (Kanto Chemical, deer grade 1) into a cylinder with a cross-sectional area of 100 cm ² with the bottom sealed, and placing a test piece on the open top of the cylinder, inverting the cylinder upside down for 45 seconds Soak acid (deer grade 1). Invert the cylinder upside down, remove the test piece, remove excess oil on the contact surface with oleic acid (deer grade 1), measure the mass of the sample piece, and calculate the oil absorption from the difference in mass before and after oil absorption. To do.

  Examples of the type of conduit ink used for the conduit layer include nitrified cotton and cellulose acetate. Of these, nitrified cotton-based ink is preferable because it is easy to handle and inexpensive. In addition, since the surface of these inks is finally protected by a transparent protective coating agent, physical properties such as stain resistance and scratch resistance are not particularly required. Therefore, cross-linking with a curing agent or the like is not necessary, and it is preferable to use a one-component type ink in terms of the process.

  In the case where a wood grain pattern is provided on the base material, the conduit layer is preferably provided in synchronization with the wood grain pattern conduit portion so that a better wood texture can be obtained. The effect of the present invention is particularly easily obtained when the conduit layer is black or dark.

The thickness of the conduit layer is preferably 0.5 to 3.5 μm because the visibility of the printed pattern on the conduit layer and the conduit layer lower layer becomes good. Moreover, as a coating amount of conduit | pipe ink, it is preferable that it is 1-4g / m < ² >.

(Transparent protective layer)
The transparent protective layer used in the present invention is a layer formed from a transparent resin coating agent containing silica (Si) particles having an average particle diameter of 2 to 8 μm. The average particle diameter of the silica particles is preferably 2.5 to 5.5 μm, and if it is less than 2 μm, the Si particles are difficult to be exposed on the surface of the transparent protective layer, and the surface of the transparent protective layer tends to be smooth. Therefore, when the contact area of a human finger increases, the fingerprint easily adheres to the entire surface of the protective coating layer, and the attached fingerprint is easily noticeable. At the same time, fingerprints attached to the protective coat layer are difficult to wipe off.
In addition, if the particle size of the silica particles is larger than 8 μm, clogging may occur during gravure printing, and the particles themselves may easily settle, which may cause serious problems during production. The haze value of the layer is increased and the design properties are lowered.

  As the transparent resin coating agent used in the present invention, various transparent resin coating agents used for a surface protective layer for building materials can be used. Of these, urethane-based, acrylic-based, or mixed curable resin coating agents can be preferably used. Further, the coating agent may be a one-component type or a two-component curable type, and may be an aqueous type or a solvent type.

  Further, the silica particles in the transparent resin coating agent are silica particles used as a matting agent, and the shape thereof may be regular or irregular. The content of the silica particles is preferably 7 to 30% by mass, more preferably 15 to 20% by mass, as a solid content ratio in the transparent resin coating agent.

The average particle diameter of the silica particles is a particle diameter measured by three-dimensional (particle volume) measurement based on the Coulter principle. Specifically, a particle size measuring device (“Multisizer III”, manufactured by Beckman Coulter, Inc.) is used. It is a particle diameter measured at an aperture diameter of 20 μm. As an example of a detailed measurement method, 0.1 g of silica is put into a glass 100 ml beaker, 1 ml of wet (Chugai Photo Chemical Co., Ltd.) is added, the beaker is shaken to wet the silica. Thereafter, 80 ml of an electrolytic solution ISOTON II (manufactured by Beckman Coulter, Inc.) is added to the beaker, and this mixed solution is subjected to dispersion treatment for 10 minutes with an ultrasonic disperser to prepare a silica dispersion. Next, the silica dispersion is dropped into a measuring container containing ISOTON II in the measuring chamber of Multisizer III so that the concentration indicated by the measuring device is 8 ± 2%, and the particle size is measured.

  Moreover, since the transparent protective coating layer becomes a part exposed on the surface of the wood grain decorative sheet, an additive or the like can be appropriately blended in order to impart stain resistance, solvent resistance, and scratch resistance.

  The transparent protective layer used in the present invention preferably has a haze value of 90% or less in order to sufficiently obtain the jetness of the conduit portion.

  The transparent protective layer used in the present invention preferably has a gloss value of 0.1 to 15, more preferably 0.1 to 5, in order to obtain a sufficient high matte property of the conduit portion. 0.1 to 0.9 is more preferable.

  Moreover, it is preferable that the contact angle of the transparent protective layer with respect to the artificial sweat (acid / alkali) is 100 degrees or more because the fingerprint is difficult to adhere and the attached fingerprint is easily wiped off.

The thickness of the transparent protective layer is preferably 2 to 10 μm, and more preferably 5 to 7 μm, from the viewpoint of ensuring the visibility of the pattern of the transparent protective layer lower layer and suitable transparency. Moreover, it is preferable that it is 5.5-8 g / m < ² > as an application quantity of a transparent protective coating agent.

(Heisei layer)
The decorative sheet of the present invention can impart physical design properties by providing a raised layer on the surface of the transparent protective layer. The raised layer can be formed of a transparent ink having a high viscosity. As the high-viscosity transparent ink, for example, a two-component curable urethane-based transparent ink can be preferably used because it has a good balance of printability, surface properties, and design properties.

The build-up layer may be formed in an arbitrary pattern, but according to the build-up layer formed by printing a transparent ink on a plate that is reversed with the conduit layer, a three-dimensional structure is formed by the height difference between the build-up layer and the conduit portion. It is preferable because design properties can be obtained and particularly good design properties can be realized.
At this time, by making the gloss of the raised layer higher than that of the conduit layer, a gloss mat effect with the conduit layer is produced, and the design can be further improved. Specifically, the gloss value of the raised layer is 3 to 40, preferably 3 to 25, and the difference in the gloss value between the conduit layer and the raised layer is preferably 3 to 10.

(Use)
The decorative sheet of the present invention can be used as a so-called wallpaper in which the decorative sheet is bonded to a wall material via an adhesive. In addition, the back surface (base material surface) of the decorative sheet can be previously subjected to adhesive processing or the like, and directly bonded to a wall or member.
In addition, the decorative sheet of the present invention can be bonded to a substrate such as a wooden substrate or an incombustible substrate via an adhesive to form a decorative plate. Specific examples of wood substrates include plywood, particle board, medium density fiber board (MDF), high density fiber board (HDF), hard board, insulation board, etc. For example, fiber reinforced cement board, glass fiber mixed cement board, fiber mixed calcium silicate board, aluminum board, metal board, gypsum board, glass wool board, etc. can be used. Moreover, what is necessary is just to select suitably about the adhesive agent for bonding to these board | substrates.

(Embodiment)
As a specific preferable configuration example of the decorative sheet of the present invention, for example, a resin-based sheet 1a is provided on a base material 1 provided with a wood grain pattern printing layer 1b. A configuration (FIG. 1) in which the above-described conduit layer 2 is provided and the transparent protective layer 3 covering the conduit layer is provided can be exemplified. Moreover, in the said structure, the base material 1, the resin base material sheet 1a, and the paper-type base material 1c are laminated | stacked through the adhesive bond layer 1d, and the woodgrain pattern printing layer 1b is provided in the resin base material sheet 1a surface. Further, on the transparent protective layer 3 of the decorative sheet having the above structure (FIG. 3), a raised layer 4 made of a transparent ink is formed on a portion other than the conduit layer in a plate reversed with the conduit layer. The provided structure (FIG. 2, FIG. 4) can be illustrated preferably.

Example 1
A base material a in which a double-sided corona PET sheet was bonded to 60 g / m ² latex-impregnated paper via a two-component curable urethane adhesive was prepared. For a, a gravure printing machine was used, and a one-component water-based acrylic ink (DIC, dark brown color) was printed as a concealing layer on the corona PET surface (coating amount: 2.0 g / m ^2. dry). Next, using a gravure printing machine, a one-component aqueous nitrified cotton-based ink (made by DIC, jet black) was printed as a conduit ink layer (coating amount: 1.5 g / m ² · dry). Furthermore, using a gravure printing machine, a transparent matte urethane-based coating agent (made by DIC / isocyanate curing type) containing 17% by mass of an amorphous silica having an average particle size of 3 μm as a transparent protective layer was printed. (Figure 1)

(Example 2)
A decorative sheet was prepared in the same manner as in Example 1 except that cellulose acetate ink (DIC, dark brown color) was used as the conduit ink.

(Example 3)
The same method as in Example 1 except that a transparent matte urethane-based ink (DIC / isocyanate curable type) containing 17% by mass of an amorphous silica having an average particle size of 5 μm as a transparent protective layer was used. A decorative sheet was created.

(Comparative Example 1)
A decorative sheet was prepared in the same manner as in Example 1 except that a urethane type (made by DIC, isocyanate-cured type, jet black) was used as the conduit ink.

(Comparative Example 2)
A decorative sheet was prepared in the same manner as in Example 1 except that acrylic ink (made by DIC, lacquer black) was used as the conduit ink.

(Comparative Example 3)
A decorative sheet was prepared in the same manner as in Example 1 except that a transparent urethane-based ink (isocyanate curing type) containing 17% by mass of amorphous silica having an average particle diameter of 1 μm as a transparent protective layer was used. .

  The following evaluation was performed about the decorative sheet of the said Example and comparative example, and the conduit | pipe layer and transparent protective layer which were used for each decorative sheet. The obtained results are shown in Table 1.

<Haze value of transparent protective layer>
The used transparent protective coating agent was applied to a PET sheet having a haze of 0.6 so that the coating thickness was 7 μm, and the haze value was measured. The haze value was measured with a haze meter HZ-2P (manufactured by Suga Test Instruments Co., Ltd., measurement light: C light source, photometry method: double beam method) in accordance with JIS K7136.

<Gloss value of transparent protective layer>
When the artificial sweat acidity (Pure Chemicals: 90044003 manufactured by Isekyu Corporation) and the artificial sweat alkalinity (Pure Chemicals: 90044004 manufactured by Isekyu Corporation) are dropped onto the transparent protective coating layer of the decorative sheet obtained in Examples and Comparative Examples. Was measured with a CA-X contact angle meter manufactured by Kyowa Interface Science Co., Ltd.

<Oil absorption of conduit ink>
On the polyethylene terephthalate film, the sample piece which laminated | stacked the conduit | pipe ink used by the said Example and comparative example with a thickness of 5.5 micrometers was created, and the sample piece mass before oil absorption was measured. After injecting oleic acid (manufactured by Kanto Chemical Co., Ltd., deer grade 1) into a resin cylinder with a cross-sectional area of 100 cm ² with the bottom sealed, a test piece was placed in the open part at the top of the cylinder, and then the cylinder was turned upside down 45 Impregnated with oleic acid (deer grade 1) for 2 seconds. Invert the cylinder upside down, remove the test piece, remove excess oil on the contact surface with oleic acid (deer grade 1) with Kim Towel, measure the mass of the sample piece after oil absorption, and the difference in mass before and after oil absorption The oil absorption was calculated from

<Hi-mat property of conduit part>
The gloss value of the transparent protective layer on the conduit part of the decorative sheet obtained in Examples and Comparative Examples was measured (measuring instrument: Gloss Checker IG-320 manufactured by Horiba, Ltd.). The smaller the gloss value, the higher the mat property, and the measured value was evaluated according to the following criteria.
A: Gross value is less than 1 (high matte property)
○: Gross value of 1 to 15 (high mat property)
▲: Gross value is over 15 (low high matte)

<Darkness of conduit part>
The jetness of the conduit part of the decorative sheet obtained in the examples and comparative examples was evaluated. The evaluation was performed visually, and the following was used as a reference.
A: Clear cloudiness with no cloudiness (high jetness)
○: Slight white turbidity is confirmed, but the pipe part as a whole has good jetness (medium jetness) ▲: White turbidity is confirmed, and the whole pipe part is low jetness (low jetness)

<Difficult to notice fingerprints>
Fingerprints were attached to the decorative sheets obtained in the examples and comparative examples, and their difficulty of conspicuousness was evaluated. The state of the attached fingerprint was evaluated according to the following criteria.
○: Gloss due to fingerprints is not noticeable ▲: Gloss due to fingerprints occurs

<Ease of wiping fingerprints>
Fingerprints were attached to the decorative sheets obtained in the examples and comparative examples, and their difficulty of being noticed was evaluated. A fingerprint is attached and left in a room temperature environment for 48 hours, and is then reciprocated 10 times with a waste cloth containing tap water to wipe off the attached fingerprint. The state after wiping was evaluated according to the following criteria.
○: Fingerprints can be wiped off with water wipes ▲: Fingerprints can hardly be wiped off with water wipes

  As shown in Table 1 above, the decorative sheets of Examples 1 to 3 of the present invention had good hi-mat properties and high jetness of the conduit portion, and the attached fingerprints were not noticeable and easy to wipe off. On the other hand, about the decorative sheet of Comparative Examples 1 and 2, the conduit part became cloudy, resulting in poor jetness. Moreover, about the decorative sheet of the comparative example 3, the attached fingerprint was conspicuous and it was difficult to wipe off with a waste cloth containing tap water.

DESCRIPTION OF SYMBOLS 1 Base material 1a Resin base material sheet 1b Wood grain pattern printing layer 1c Paper-type base material sheet 1d Adhesive layer 2 Conduit layer 3 Transparent protective layer 4 Elevated layer

Claims (8)

A decorative sheet having at least a conduit layer and a transparent protective layer covering the conduit layer on a substrate having a wood grain pattern,
The conduit layer is formed by laminating conduit ink with a thickness of 5.5 μm on a polyethylene terephthalate film, and using oleic acid (deer grade 1) in accordance with the oil absorption test (Cobb modified method) of JIS C-2300. A layer made of conduit ink having an oil absorption of 45 to 100 mg / 100 cm ² ,
The decorative sheet, wherein the transparent protective layer is formed of a transparent resin coating agent containing silica particles, and the silica particles have an average particle diameter of 2 to 8 μm.   The decorative sheet according to claim 1, wherein the transparent protective layer has a haze value of 90% or less.   The decorative sheet according to claim 1, wherein the conduit layer has a thickness of 0.5 to 3.5 µm, and the transparent protective layer has a thickness of 5.0 to 7 µm.   The decorative sheet according to any one of claims 1 to 3, which is provided on the wood grain pattern so that the conduit layer is synchronized with the wood grain pattern.   The decorative sheet according to any one of claims 1 to 4, wherein a raised layer is provided on the transparent protective layer.   The decorative sheet according to claim 5, wherein the raised layer is a raised layer provided by a plate that is reversed with the conduit layer.   The decorative sheet according to claim 5 or 6, wherein the transparent protective layer has a surface gloss value of 0.1 to 15, and the raised layer has a gloss value of 3 to 40.   A decorative board, wherein the decorative sheet according to any one of claims 1 to 7 is laminated on a substrate.