JP6763150B2 - Decorative sheet and decorative board - Google Patents

Description

The present invention relates to a decorative sheet and a decorative board.

Conventionally, as a decorative sheet, for example, there is a technique described in Patent Document 1. In the technique described in Patent Document 1, the pattern layer formed on the sheet base material, the first surface protective layer formed on the pattern layer, and the first surface protective layer are formed. The second surface protective layer includes a second surface protective layer, and the second surface protective layer contains synthetic resin beads protruding from the second surface protective layer. As a result, the surface of the decorative sheet is provided with irregularities so that a three-dimensional effect can be felt by touch.
Further, in such a decorative sheet, in general, the gloss of the outermost layer (the gloss of the second surface protective layer) is made higher than the gloss of the inner layer than the outermost layer (the gloss of the first surface protective layer). ing.

JP-A-2015-77709

However, in the technique described in Patent Document 1, since the hardness of the surface of the decorative sheet is relatively low, the scratch resistance is low and the stain resistance may be low.
The present invention focuses on the above points, and provides a decorative sheet and a decorative board which are excellent in stain resistance and design and have a visual three-dimensional effect while maintaining a three-dimensional effect by touch. The purpose is.

In order to solve the above problems, one aspect of the present invention includes a first ink layer formed on a sheet substrate and a second ink layer partially formed on the first ink layer. A first surface protection is provided with a pattern layer, a first surface protection layer formed on the pattern layer, and a second surface protection layer partially formed on the first surface protection layer. Both the layer and the second surface protective layer contain a two-component curable urethane resin containing a polyol as a main component and an isocyanate as a cross-linking agent, and the second of the first surface protective layer and the second surface protective layer. Only the surface protective layer further contains silica particles, and the gloss of the second surface protective layer is made lower than the gloss of the first surface protective layer, so that the first surface protective layer expresses a convex portion and the second surface. The protective layer expresses the recesses to give a visual three-dimensional effect, and the second surface protective layer is formed in a region of the second ink layer that overlaps the second ink layer in a plan view. It has a shape synchronized with the pattern, covers an area of 0.1% or more and 30% or less of the first surface protective layer, and the second surface protective layer is different from synthetic resin beads or silica particles. By further containing a filler of another inorganic compound, and by containing synthetic resin beads or a filler, the maximum height Rmax value of the surface of the second surface protective layer measured by a contact type roughness meter is set to 30 μm or more by tactile sensation. It is characterized by having a structure that gives a three-dimensional effect.

According to one aspect of the present invention, the first surface protective layer is formed of a resin having high hardness, the gloss of the first surface protective layer is increased, and the second surface protective layer is formed of the first surface protective layer. Even if it is formed on the surface protective layer, it is formed of a resin that can express a visual three-dimensional effect without being affected by the gloss of the first surface protective layer, so that the first surface protective layer exposed on the surface causes Scratch resistance and stain resistance can be improved, and a visual three-dimensional effect can be imparted. Thereby, it is possible to provide a decorative sheet having excellent scratch resistance and stain resistance and having a visual three-dimensional effect while maintaining a three-dimensional effect due to the tactile sensation.

It is an end view which shows the decorative sheet and the decorative board which concerns on embodiment of this invention. It is an end view which shows the modification of the decorative sheet and the decorative board.

Next, an embodiment of the present invention will be described with reference to the drawings.
Here, the drawings are schematic, and the relationship between the thickness and the plane dimension, the ratio of the thickness of each layer, and the like are different from the actual ones. Further, the embodiments shown below exemplify a configuration for embodying the technical idea of the present invention, and the technical idea of the present invention describes the material, shape, structure, etc. of the constituent parts as follows. It is not specific to the thing. The technical idea of the present invention may be modified in various ways within the technical scope specified by the claims stated in the claims.

(Decorative board 10)
As shown in FIG. 1, the decorative board 10 of the present embodiment has a pattern layer 2 and a first surface protective layer 3 on one surface (hereinafter, also referred to as “surface 1S”) side of the sheet base material 1. And the second surface protective layer 4 are laminated in this order to form the decorative sheet 20, and the substrate 5 is bonded to the other surface (hereinafter, also referred to as “back surface 1T”) side of the sheet base material 1. To. The decorative board 10 of the present embodiment is particularly suitable for interior applications such as sliding doors having a large area.

(Sheet base material 1)
The sheet base material 1 is a sheet-like layer having moisture resistance. Moisture proof is a property that makes it difficult for water vapor to pass through. As the sheet base material 1, for example, a moisture-proof paper having two paper base materials 1a and 1b and a moisture-proof resin layer 1c arranged between the two paper base materials 1a and 1b can be used. As the paper base materials 1a and 1b, for example, inter-paper reinforced paper containing a resin between the cellulose fibers can be used. As the inter-paper reinforced paper, for example, one containing 50% by mass or more of cellulose fibers is preferable. The thickness of the inter-paper reinforced paper is, for example, 15 μm or more and less than 60 μm. The basis weight of the paper substrate 1a on the front surface 1S side of the sheet substrate 1 is 30 g / m ^2, and the basis weight of the paper substrate 1b on the back surface 1T side is 23 g / m ² .
The moisture-proof resin layer 1c is a layer made of a moisture-proof resin that does not allow water vapor to pass through. As the moisture-proof resin, for example, a thermoplastic resin such as an olefin resin having a melting point of 100 ° C. or higher and lower than 200 ° C. is preferable. The thickness of the moisture-proof resin layer 1c is, for example, 20 μm or more and less than 70 μm.

In this way, the sheet base material 1 is made into a moisture-proof paper that does not allow water vapor to pass through. Therefore, it is possible to make it difficult for water vapor to pass from the front surface side to the back surface side of the decorative sheet 20, that is, from the second surface protective layer 4 side to the substrate 5 side, and prevent the substrate 5 from being deformed by water vapor (humidity). it can. Therefore, for example, by forming a sliding door having a large area with the decorative plate 10, it is possible to prevent the sliding door from being deformed by water vapor (humidity), and it is possible to prevent the sliding door from being unable to open and close due to the deformation.
Further, the moisture-proof paper has two paper base materials 1a and 1b and a moisture-proof resin layer 1c arranged between them. Therefore, the sheet base material 1 can have thickness and elasticity. Therefore, the decorative sheet 20 is less likely to wrinkle, and curling of the decorative sheet 20 can be prevented. As a result, the decorative sheet 20 can be relatively easily laminated on the substrate 5.
Although the example in which the moisture-proof paper is used as the sheet base material 1 is shown in the present embodiment, other configurations can be adopted. For example, a resin film having a moisture-proof property may be used.

(Pattern pattern layer 2)
The pattern pattern layer 2 is a layer formed on the sheet base material 1 (surface 1S) by printing to add a pattern for imparting design. As the pattern, for example, a pattern suitable for the place where the decorative sheet 20 is used, such as wood grain, cork, stone grain, tile, pottery, and abstract pattern, can be selected. In the pattern layer 2, the pattern ink layer 2a that covers the entire surface 1S and serves as the base color of the pattern and the conduit ink layer 2b that represents the pattern other than the base color are laminated in this order on the surface 1S of the sheet base material 1. It is formed. As the printing ink, for example, any one of isoindolinone yellow, polyazored, phthalocyanine blue, carbon black, iron oxide, titanium oxide, or a mixture thereof can be used as a pigment. Further, for example, ethyl acetate, n-butyl acetate, isobutanol and methyl isobutyl ketone can be used as solvents.

(First surface protective layer 3)
The first surface protective layer 3 is a sheet-like layer formed on the pattern layer 2 and covering the entire pattern layer 2. The first surface protective layer 3 is formed of a transparent or translucent material (resin) to the extent that the pattern of the pattern pattern layer 2 can be seen through the first surface protective layer 3. As the material of the first surface protective layer 3, for example, a thermosetting resin is preferable. The thermosetting resin has a urethane bond such as a two-component curable urethane resin, considering, for example, the adhesiveness to the second surface protective layer 4, the deformation followability of the decorative sheet 20, and the scratch resistance. It is preferable to use a thermosetting resin (binder). Here, no matting agent such as silica particles is added to the thermosetting resin. Further, as the solvent, ethyl acetate or n-butyl acetate can be used.
As the two-component curable urethane resin, for example, a urethane resin containing a polyol as a main component and an isocyanate as a cross-linking agent (curing agent) can be used. As the polyol, those having two or more hydroxyl groups in the molecule, for example, polyethylene glycol, polypropylene glycol, acrylic polyol, polyester polyol, polyether polyol, polycarbonate polyol, polyurethane polyol can be used.

Further, as the isocyanate, a multivalent isocyanate having two or more isocyanate groups in the molecule can be used. For example, aromatic isocyanates such as 2,4-tolylene diisocyanate, xylene diisocyanate and 4,4'-diphenylmethane diisocyanate, or 1,6-hexamethylene diisocyanate, isophorone diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated diphenylmethane diisocyanate and the like. (Or alicyclic) isocyanate can be used. In addition, adducts or multimers of the above-mentioned various isocyanates can be used. For example, there are adducts of tolylene diisocyanate, trimer of tolylene diisocyanate (trimer) and the like. Among the above-mentioned isocyanates, the aliphatic (or alicyclic) isocyanate is preferable in that it can have good weather resistance and heat-resistant yellowing, and for example, 1,6-hexamethylene diisocyanate can be used.
As described above, since the first surface protective layer 3 does not contain the matting agent, the amount of light reflected is larger than that of the second surface protective layer 4 to which the matting agent (silica particles) described later is added. It can be made larger and the gloss can be increased. Therefore, the second surface protective layer 4 provides a gloss difference on the surface of the decorative sheet 20, and the illusion of the human eye can be used to visually give a three-dimensional effect.
Further, since the first surface protective layer 3 contains a thermosetting resin having a urethane bond, that is, a resin having high hardness, the first surface protective layer 3 exposed on the surface improves the scratch resistance of the decorative sheet 20. Can be improved. Further, since the gloss (gloss) of the first surface protective layer 3 is made larger than the gloss (gloss) of the second surface protective layer 4, the smoothness of the surface of the first surface protective layer 3 can be improved. Fingerprints (hand stains) are less likely to get dirty, and the stain resistance of the decorative sheet 20 can be improved. The effect of improving stain resistance can be obtained even when the coating amount of the first surface protective layer 3 is low. In addition, it is possible to perform painting-like pattern expression (wood grain expression, etc.) that is popular in the United States and the like. Further, since the white turbidity of the first surface protective layer 3 is reduced, it is possible to express the design of a more delicate and transparent pattern.

(Second surface protective layer 4)
The second surface protective layer 4 is partially formed on the first surface protective layer 3 and covers a part of the first surface protective layer 3 (for example, a portion of the conduit ink layer 2b facing the printing ink). It is a layer to do. This makes it possible to express the wood grain conduit both visually and tactilely. The second surface protective layer 4 may be formed in an area of 0.1% or more on the first surface protective layer 3, for example. In the present embodiment, since the first surface protective layer 3 has high scratch resistance and stain resistance, even if the area of the second surface protective layer 4 is small, the decorative sheet 20 has scratch resistance and stain resistance. It can be excellent.
Further, the second surface protective layer 4 is formed of a transparent or translucent material (resin) to the extent that the pattern of the pattern pattern layer 2 can be seen through the second surface protective layer 4 and the first surface protective layer 3. Has been done. As the material of the second surface protective layer 4, for example, a thermosetting resin is preferable. Examples of the thermosetting resin include silica particles and the like in a thermosetting resin (binder) having a urethane bond such as a two-component curable urethane resin, considering the adhesiveness with the first surface protective layer 3. It is preferable to use a mixture containing the above-mentioned matting agent and synthetic resin beads. By adding a matting agent, the gloss (gloss) of the first surface protective layer 3 is made higher than the gloss of the second surface protective layer 4. The upper limit of the area of the second surface protective layer 4 is 30% or less of that on the first surface protective layer 3.
As described above, since the second surface protective layer 4 is formed of a thermosetting resin having a urethane bond, that is, a resin that is not affected by the gloss of the lower layer (first surface protective layer 3), the first surface is formed. The protective layer 3 and the second expression protective layer 4 can appropriately express a visual three-dimensional effect. Further, since the thermosetting resin having a urethane bond has high hardness, the scratch resistance of the decorative sheet 20 can be improved.

The silica particles are preferably contained in an amount of 5% by mass or more based on the total mass of the thermosetting resin. As a result, the gloss of the second surface protective layer 4 can be sufficiently reduced, and the gloss difference between the second surface protective layer 4 and the first surface protective layer 3 can be increased. Therefore, even if the area of the second surface protective layer 4 is smaller than the total area of the first surface protective layer 3, the visual three-dimensional effect can be appropriately felt. The upper limit of the silica particles is 35% by mass or less with respect to the total mass of the thermosetting resin.
As the synthetic resin beads, for example, acrylic resin beads having high transparency can be used. As a result, the transparency of the second surface protective layer 4 can be improved, and the pattern of the pattern pattern layer 2 for imparting a design can be seen through more clearly. The average particle size of the synthetic resin beads shall be 30 μm or more. Further, as the solvent, ethyl acetate or n-butyl acetate can be used.
Further, the surface of the second surface protective layer 4 has a maximum height Rmax value of 30 μm or more measured by a contact roughness meter. As a result, the three-dimensional effect due to the tactile sensation can be felt more appropriately.

In the present embodiment, an example in which a thermosetting resin is used as the binder is shown, but other configurations can also be adopted. For example, an ionizing radiation curable resin may be used. As the ionizing radiation curable resin, for example, an ultraviolet curable resin is preferable. As the ultraviolet curable resin, for example, (meth) acrylic resin, silicone resin, polyester resin, urethane resin, amide resin, and epoxy resin can be used. As a result, the hardness of the second surface protective layer 4, that is, the outermost surface layer of the decorative sheet 20, can be improved, and the surface physical properties such as abrasion resistance, scratch resistance, and solvent resistance of the decorative sheet 20 can be improved. Further, for example, the binder may be configured to use a mixture of a thermosetting resin and an ionizing radiation curable resin.
Further, in the present embodiment, an example in which synthetic resin beads are added to a thermosetting resin is shown, but other configurations may be adopted, and for example, a filler of an inorganic compound may be added.
The shape of the second surface protective layer 4 is not particularly limited, and may be a regular shape such as a circle, a quadrangle, or a hexagon, or an irregular pattern shape. Further, the shape may be synchronized with the pattern of the pattern pattern layer 2, and the pattern can be made to look more realistic.

(Board 5)
The substrate 5 is a plate-shaped member made of metal or wood. As the metal system, for example, aluminum, steel, stainless steel, and composite panels can be used. As the composite panel, for example, there is a panel provided with a resin layer serving as a core material and metal plates (aluminum, galvalume, stainless steel, etc.) attached to both sides of the resin layer. Further, as the wood type, MDF (medium density fiberboard), plywood, and particle board can be used.

As described above, in the present embodiment, since the transparent or translucent first surface protective layer 3 and the second surface protective layer 4 are provided on the pattern pattern layer 2, the pattern of the pattern pattern layer 2 is seen through. Can be done.
Further, in the present embodiment, since the gloss of the first surface protective layer 3 is made higher than the gloss of the second surface protective layer 4, the convex portion can be expressed by the first surface protective layer 3 and the second surface protection. The recess can be expressed by the layer 4, and a three-dimensional effect can be visually felt. Further, since the second surface protective layer 4 contains synthetic resin beads or a filler, a three-dimensional effect can be felt by touch.
Further, in the present embodiment, since the moisture-proof paper is used as the sheet base material 1, it is difficult for water vapor to pass from the front surface side to the back surface side of the decorative sheet 20, that is, from the second surface protective layer 4 side to the substrate 5 side. This can prevent the substrate 5 from being deformed by water vapor (humidity). Therefore, for example, by forming a sliding door having a large area with the decorative plate 10, it is possible to prevent the sliding door from being deformed by water vapor (humidity), and it is possible to prevent the sliding door from being unable to open and close due to the deformation.

(Effect of this embodiment)
The invention according to the present embodiment has the following effects.
(1) The decorative sheet 20 according to the present embodiment has a pattern layer 2 formed on the sheet base material 1, a first surface protective layer 3 formed on the pattern layer 2, and a first surface. A second surface protective layer 4 partially formed on the protective layer 3 is provided. The first surface protective layer 3 contains a thermosetting resin having a urethane bond. In addition, the second surface protective layer 4 contains synthetic resin beads or a filler of an inorganic compound. Further, the gloss of the first surface protective layer 3 is higher than the gloss of the second surface protective layer 4.

In this way, the first surface protective layer 3 is formed of a resin having high hardness, the gloss of the first surface protective layer 3 is increased, and the second surface protective layer 4 is protected by the first surface. Even if it is formed on the layer 3, it is formed of a resin capable of expressing a visual three-dimensional effect without being affected by the gloss of the first surface protective layer 3, so that the first surface protective layer 3 exposed on the surface , Scratch resistance and stain resistance can be improved, and a visual three-dimensional effect can be imparted. Thereby, it is possible to provide a decorative sheet having excellent scratch resistance and stain resistance and having a visual three-dimensional effect while maintaining a three-dimensional effect due to the tactile sensation.

(2) In the decorative sheet 20 according to the present embodiment, the second surface protective layer 4 contains 5% by mass or more and 35% by mass or less of silica particles.
According to such a configuration, since the silica particles contained in the second surface protective layer 4 are set to 5% by mass or more and relatively large, the gloss of the second surface protective layer 4 can be sufficiently reduced, and the second surface protective layer 4 can be sufficiently reduced. The gloss difference between the surface protective layer 4 and the first surface protective layer 3 can be increased. Therefore, for example, even if the area of the second surface protective layer 4 is small, the visual three-dimensional effect can be appropriately felt.

(3) In the decorative sheet 20 according to the present embodiment, the synthetic resin beads are acrylic resin beads.
According to such a configuration, the transparency of the second surface protective layer 4 can be improved, and the pattern of the pattern pattern layer 2 for imparting a design can be seen through the second surface protective layer 4 more clearly.
(4) In the decorative sheet 20 according to the present embodiment, the sheet base material 1 includes two paper base materials 1a and 1b and a moisture-proof resin layer 1c arranged between the two paper base materials 1a and 1b. To be equipped.
According to such a configuration, the sheet base material 1 can have a thickness and elasticity. Therefore, the decorative sheet 20 is less likely to wrinkle, and curling of the decorative sheet 20 can be prevented. Therefore, the decorative sheet 20 can be relatively easily laminated on the substrate 5.

(5) In the decorative sheet 20 according to the present embodiment, the surface of the second surface protective layer 4 has a maximum height Rmax value of 30 μm or more measured by a contact roughness meter.
According to such a configuration, the three-dimensional effect due to the tactile sensation can be felt more appropriately.
(6) In the decorative sheet 20 according to the present embodiment, the first surface protective layer 3 contains a thermosetting resin having a urethane bond.
According to such a configuration, the adhesiveness with other layers such as the pattern pattern layer 2 and the second surface protective layer 4, the deformation followability of the decorative sheet 20, and the scratch resistance can be improved.

(7) In the decorative sheet 20 according to the present embodiment, the second surface protective layer 4 contains a thermosetting resin having a urethane bond and silica particles.
According to such a configuration, the adhesiveness to the adjacent layer such as the first surface protective layer 3 and the deformation followability and the scratch resistance of the decorative sheet 20 can be improved.
(8) The decorative board 10 according to the present embodiment is formed by bonding the decorative sheet 20 to the substrate 5.
According to such a configuration, it is possible to provide a decorative board 10 having excellent stain resistance and design.

(Modification example)
In the above embodiment, the difference in gloss between the first surface protective layer 3 and the second surface protective layer 4 and the height difference between the first surface protective layer 3 and the second surface protective layer 4 are visually determined. Although an example of giving a three-dimensional effect and a three-dimensional effect by touch is shown, other configurations can be adopted. For example, as shown in FIG. 2, the decorative sheet 20 may be embossed by embossing so that the embossing gives a more three-dimensional effect due to the tactile sensation. In this case, in the embossing process, the decorative sheet 20 is formed with an uneven shape by passing a recess having a depth of 15 μm or more between the embossing roll and the rubber back roll having a hardness of 50 degrees or more and less than 90 degrees. You may. As a method for measuring hardness, for example, JIS K 6301 A type can be used. Then, the substrate 5 is attached to the embossed decorative sheet 20 to form the decorative board 10.

1 Sheet base material 1a Paper base material 1b Paper base material 1c Moisture-proof resin layer 2 Pattern pattern layer 2a Pattern ink layer 2b Conduit ink layer 3 First surface protective layer 4 Second surface protective layer 5 Substrate 10 Decorative board 20 Decorative sheet

Claims (6)

A pattern layer including a first ink layer formed on a sheet base material and a second ink layer partially formed on the first ink layer, and a pattern layer formed on the pattern layer. A first surface protective layer and a second surface protective layer partially formed on the first surface protective layer are provided.
Both the first surface protective layer and the second surface protective layer contain a two-component curable urethane resin containing a polyol as a main component and an isocyanate as a cross-linking agent.
Of the first surface protective layer and the second surface protective layer, only the second surface protective layer further contains silica particles, and the gloss of the second surface protective layer is adjusted to that of the first surface protective layer. By making it lower than the gloss, the convex portion is expressed by the first surface protective layer and the concave portion is expressed by the second surface protective layer, so that a three-dimensional effect is visually felt.
The second surface protective layer has a shape synchronized with the pattern of the second ink layer in a region overlapping the portion of the second ink layer in a plan view, and is a surface protective layer of the first surface protective layer. It covers an area of 0.1% or more and 30% or less.
The second surface protective layer further contains a filler of an inorganic compound different from the synthetic resin beads or the silica particles, and by containing the synthetic resin beads or the filler, the surface of the second surface protective layer A decorative sheet characterized in that the maximum height Rmax value measured by a contact-type roughness meter is set to 30 μm or more, and a three-dimensional effect is felt by touch. The decorative sheet according to claim 1, wherein the second surface protective layer contains silica particles in an amount of 5% by mass or more and 35% by mass or less. The decorative sheet according to claim 1 or 2, wherein the synthetic resin beads are acrylic resin beads. The one according to any one of claims 1 to 3, wherein the sheet base material includes two paper base materials and a moisture-proof resin layer arranged between the two paper base materials. Cosmetic sheet. The decorative sheet according to any one of claims 1 to 4 , further comprising embossing on the surface of the decorative sheet. A decorative board characterized in that the decorative sheet according to any one of claims 1 to 5 is attached to a substrate.

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