JP7392279B2 - Decorative material - Google Patents

Description

The present invention relates to decorative materials.

In addition to building interior parts such as walls, ceilings, and floors, window frames, various doors such as entrance doors, handrails, baseboards, surrounding edges, window frames, door frames, moldings, and other fittings or fixtures, kitchens, Decorative surface panels for cabinets of furniture, light electrical appliances, OA equipment, etc. are generally made of various materials such as resin, wood, and metal as adherends, and decorative materials are laminated to these adherends. etc. are used.

Various decorative materials have been proposed for use in the above-mentioned applications, and for example, a decorative sheet having a base material, a pattern layer, and a surface protective layer has been proposed (for example, Patent Document 1). This decorative material has an excellent design that visually expresses concavities by the difference in gloss between the areas where the decorative layer is provided and the areas where it is not. Because it uses a composition, it is a decorative material with excellent surface properties such as stain resistance and marring resistance (scratch resistance). Further, a base sheet, a pattern colored layer, and a transparent top sheet are laminated in this order, and the hue of at least the surface of the base sheet on the pattern colored layer side is matched with the hue of the pattern colored layer, and the optical density is adjusted to match the hue of the pattern colored layer. A decorative sheet that matches the value of the lowest optical density of the colored layer has been proposed (for example, Patent Document 2).

Japanese Patent Application Publication No. 2005-125780 Japanese Patent Application Publication No. 11-198320

By the way, when the decorative materials used for the above-mentioned purposes are processed into various types of fittings, etc., and when transported to the construction site, they may rub against each other, various components such as other wood, or jigs during transport, or may collide. A shock may be applied. Although the decorative sheet of Patent Document 1 has a surface protective layer formed of an ionizing radiation-curable resin composition and has excellent resistance to contamination, marring, etc. during daily use, However, it is not expected that the product will be resistant to abrasion, impact, etc. during transportation, and in reality, it is impossible to form a surface protective layer that can withstand such abrasion, impact, etc. during transportation. Therefore, due to friction, impact, etc. during transportation, the decorative layer may peel off from the base material together with the surface protective layer, and the lower layer covered by the decorative layer may be exposed, resulting in a decrease in design.

As a decorative sheet that suppresses deterioration in design due to exposure of the lower layer, as in the decorative sheet of Patent Document 2, each layer of the base sheet, pattern colored layer, and transparent top sheet that constitute the decorative sheet is used. A method of roughly matching the hues may be used. However, the base sheet is generally a general-purpose product in consideration of cost reduction and the like, and is not manufactured uniformly for each product. As a result, as demand for designs from consumers has become increasingly diverse in recent years, there is no base material sheet that roughly matches the desired pattern and hue, resulting in the problem of not being able to adequately respond to the diversification of designs. .

The present invention has been made under these circumstances, and is capable of responding to the diversification of designs while suppressing deterioration in design even if the decorative layer etc. peels off due to friction, impact, etc. during transportation. The purpose is to provide decorative sheets and decorative materials.

As a result of intensive research to solve the above problems, the present inventors have found that the above problems can be solved by an invention related to a decorative material having the following configuration.

[1] Has a base material and a decorative layer,
The lightness (L ^* ₁ ) of the base material and the lightness (L ^* ₂ ) of the decorative layer satisfy the following relational expression (1),
The saturation (C ^* ₁ ) of the base material and the saturation (C ^* ₂ ) of the decorative layer satisfy the following relational expression (2),
and the color difference (ΔE ^* ab) between the base material and the decorative layer satisfies the following relational expression (3),
Decorative materials.
Relational expression (1) -15≦L ^* ₂ -L ^* ₁ ≦10
Relational expression (2) -10≦C ^* ₂ -C ^* ₁ ≦25
Relational expression (3) ΔE ^* ab≧3
[2] The decorative material according to [1] above, further comprising a surface protective layer in the order of the base material, the decorative layer, and the surface protective layer.
[3] The decorative material according to [1] or [2] above, further comprising an adherend on the surface of the base material opposite to the surface having the pattern layer, with an adhesive layer interposed therebetween.

According to the present invention, it is possible to provide a decorative sheet and a decorative material that can suppress deterioration in design even if a decorative layer or the like peels off due to friction, impact, etc. during transportation.

FIG. 1 is a schematic cross-sectional view showing the layer structure of an example of the decorative material of the present invention. FIG. 1 is a schematic cross-sectional view showing the layer structure of an example of the decorative material of the present invention.

[Decorative materials]
The decorative material of the present invention will be explained below. In addition, in this specification, numerical values related to "more than", "less than", and "~" in the description of numerical ranges are numerical values that can be arbitrarily combined, and the numerical values in the examples are numerical values that can be used as the upper and lower limits of the numerical range. Suppose that

The decorative material of the present invention has a base material and a decorative layer, and the lightness (L ^* ₁ ) of the base material and the lightness (L ^* ₂ ) of the decorative layer satisfy the following relational expression (1), The saturation (C ^* ₁ ) of the base material and the saturation (C ^* ₂ ) of the decorative layer satisfy the following relational expression (2), and the color difference (ΔE ^* ab) between the base material and the decorative layer ) satisfies the following relational expression (3).
Relational expression (1) -15≦L ^* ₂ -L ^* ₁ ≦10
Relational expression (2) -10≦C ^* ₂ -C ^* ₁ ≦25
Relational expression (3) ΔE ^* ab≧3
In the decorative material of the present invention, by selecting a relationship between the base material and the decorative layer that satisfies the above relational expression, even if the decorative layer is peeled off from the base material, the peeled area is It does not stand out from the non-peeled area, and as a result, it is possible to suppress deterioration in design. Normally, as in Patent Document 2, for example, the more the hues are roughly matched, that is, the smaller the color difference (ΔE ^* ab) is, the closer it is to 0, the less the peeled area will stand out from other non-peeled areas. , it is believed that deterioration in design quality can be suppressed. However, in the present invention, even when the color difference (ΔE ^* ab) is large, by combining specific lightness (L ^* ) and chroma (C ^* ), that is, as shown in the above relational expression (1), The difference between the lightness (L ^* ₂ ) of the decorative layer and the lightness (L ^* ₁ ) of the base material (hereinafter sometimes referred to as "lightness difference (ΔL ^* )") is expressed by the above relational expression (2). The difference between the chroma (C ^* ₂ ) of the decorative layer shown and the chroma (C ^* ₁ ) of the base material (hereinafter sometimes referred to as "chroma difference (ΔC ^* )"), and the above relationship By simultaneously satisfying the color difference (ΔE ^* ab) shown in equation (3), the peeled area becomes less noticeable from other non-peeled areas, making it possible to suppress deterioration in design. Furthermore, according to the present invention, it is possible to suppress deterioration in design even when the color difference (ΔE ^* ab) is large, so that various base materials can be applied to various patterns, etc. of the decorative layer. This makes it possible to easily respond to the diversification of design demands from consumers in recent years.

Regarding relational expression (1) regarding lightness (L ^* ), the lightness difference (ΔL ^* ) is required to be −15 or more and 10 or less. If the brightness difference (ΔL ^* ) is less than -15 or greater than 10, the area where the decorative layer etc. has peeled off will stand out from other areas where it has not peeled off, and the design will deteriorate.

From the perspective of suppressing the deterioration of design quality by making the peeled area less noticeable from other non-peeled areas, the lightness difference (ΔL ^* ) is preferably -13 or more, more preferably -11 or more, even more preferably -10 or more. The upper limit is preferably 9 or less, more preferably 8 or less, and even more preferably 7 or less.

From the same viewpoint, it is particularly preferable that the brightness difference (ΔL ^* ) satisfies the following relational expression (1a) or (1b).
Relational expression (1a) -14≦L ^* ₂ -L ^* ₁ ≦-0.1
Relational expression (1b) 1≦L ^* ₂ -L ^* ₁ ≦9
In relational expression (1a), the lower limit is preferably -13 or more, more preferably -11 or more, even more preferably -10 or more, and the upper limit is preferably -2 or less, more preferably -3 or less, still more preferably - 5 or less.
In relational expression (1b), the upper limit is preferably 8 or less, more preferably 7 or less, and the lower limit is preferably 2 or more.
Generally, the smaller the brightness difference (ΔL ^* ) is (the closer it is to 0), the smaller the difference in brightness between the area where the decorative layer etc. has peeled off and other areas that have not peeled off, so the peeled area is I think it makes it less noticeable. However, in the present invention, even if the lightness difference (ΔL ^* ) is larger than 0 (even if it is far from 0), other saturation differences (ΔC ^* ) and color differences (ΔE ^* ab) are kept within a predetermined range. By doing so, it is possible to more easily make the peeled region less noticeable and suppress the deterioration of the design.

Regarding relational expression (2) regarding chroma (C ^* ), the chroma difference (ΔC ^* ) must be −10 or more and 25 or less. If the saturation difference (ΔC ^* ) is less than -10 or greater than 25, the area where the decorative layer etc. has peeled off will stand out from other areas where it has not peeled off, and the design will deteriorate.

If we further consider that by making the peeled area less noticeable from other non-peeled areas, we can suppress the deterioration of the design quality and more stably suppress the design quality, the saturation difference (ΔC ^* ) , preferably -8 or more, more preferably -7 or more, still more preferably -6 or more, and the upper limit is preferably 23 or less, more preferably 20 or less, still more preferably 16 or less.

From the same viewpoint, it is particularly preferable that the saturation difference (ΔC ^* ) satisfies the following relational expression (2a) or (2b).
Relational expression (2a) -8≦C ^* ₂ -C ^* ₁ ≦-1
Relational expression (2b) 3≦C ^* ₂ -C ^* ₁ ≦23
In relational expression (2a), the lower limit is preferably -7 or more, more preferably -6 or more, even more preferably -5 or more, and the upper limit is preferably -2 or less, more preferably -3 or less, still more preferably - 5 or less.
In relational expression (2b), the upper limit is preferably 21 or less, more preferably 20 or less, still more preferably 17 or less, and the lower limit is preferably 4 or more, more preferably 5 or more, and still more preferably 8 or more.
Generally, the smaller the saturation difference (ΔC ^* ) is (the closer it is to 0), the smaller the difference in brightness between the area where the decorative layer etc. has peeled off and other areas that have not peeled off, so the peeled area This is thought to make it less noticeable. However, in the present invention, even if the saturation difference (ΔC ^* ) is larger than 0 (even if it is far from 0), other lightness differences (ΔL ^* ) and color differences (ΔE ^* ab) are within a predetermined range. By doing so, it is possible to more easily make the peeled region less noticeable and suppress the deterioration of the design.

Regarding relational expression (3) regarding color difference (ΔE ^* ab), color difference (ΔE ^* ab) is 3 or more. The peeled area becomes less noticeable from other non-peeled areas, and from the viewpoint of suppressing the deterioration of the design, and further considering that the design can be suppressed more stably, the color difference (ΔE ^* ab) is as follows. Preferably, it is 5 or more, that is, it is preferable that the following relational expression (3a) is satisfied.
Relational expression (3a) ΔE ^* ab≧5
Further, from the same viewpoint, ΔE ^* ab is preferably 9 or more, more preferably 15 or more, and still more preferably 20 or more. Further, there is no particular restriction on the upper limit of ΔE ^* ab, but from the same viewpoint, it is preferably 35 or less, more preferably 32 or less, and still more preferably 30 or less.

Generally, the smaller the color difference (ΔE ^* ab) (the closer it is to 0), the smaller the difference in brightness between the area where the decorative layer etc. has peeled off and the other areas that have not peeled off, so the peeled area is It is also possible that it becomes less noticeable. However, in the present invention, even if the color difference (ΔE ^* ab) is larger than 0 (even if it is far from 0), other lightness differences (ΔL ^* ) and chroma differences (ΔC ^* ) are kept within a predetermined range. By doing so, it is possible to more easily make the peeled region less noticeable and suppress the deterioration of the design.
In the decorative material of the present invention, the color difference (ΔE ^* ab) may be large as described above, so for example, when the decorative layer exhibits a brown wood grain pattern, it may be Even if materials with completely different hues are used, as long as the above relational expressions (1) to (3) are satisfied, the effect of the present invention, that is, the peeled area becomes less noticeable from other non-peeled areas, and the design quality is reduced. This has the effect of suppressing the

In the present invention, the lightness difference (ΔL ^* ), the chroma difference (ΔC ^* ), and the color difference (ΔE ^* ab) are numerical values determined as follows.
First, the lightness L ^* ₂ , chromaticity a ^* ₂ and b ^* ₂ of the decorative layer are measured. Specifically, a decorative material (size: 100 cm x 100 cm) is divided into 100 pieces (size per divided piece: 10 cm x 10 cm), and each of the 20 divided pieces is subjected to spectroscopy at 50 arbitrary points. Using a colorimeter, L ^* , a ^* , and b ^* were measured, and the average value of the measured values was taken as the L ^* , a ^* , and b ^* of the decorative layer of the divided sheet, and the decoration of the 20 divided sheets was determined. The average values of L ^* , a ^* , and b ^* of the layer are defined as lightness L ^* ₂ and chromaticity a ^* ₂ and b ^* ₂ . That is, it can be said that the lightness L ^* ₂ and chromaticities a ^* ₂ and b ^* ₂ of the decorative layer are substantially the lightness L ^* ₂ and chromaticities a ^* ₂ and b ^* ₂ of the decorative material.

In addition, since the base material is usually plain, L ^* , a ^* , b ^* are measured at any one point using a spectrophotometer, and these are calculated as the lightness L ^* ₁ and chromaticity a ^* ₁ of the base material. and b ^* ₁ . In addition, when the decorative layer is a layer consisting only of a single colored layer on the entire surface, the lightness L ^* ₂ and chromaticity a ^* ₂ and b ^* ₂ may be measured by the same method as for the above base material; When the material has a pattern, the lightness L ^* ₁ and the chromaticities a ^* ₁ and b ^* ₁ may be measured using the same method as for the decorative layer.

These L ^* , a ^* , b ^* are specified in the color display method of JIS Z8781-5:2013, and are measured using a commercially available spectrophotometer (for example, the spectrocolorimeter/colorimeter "SE6000"). (model number), manufactured by Nippon Denshoku Industries Co., Ltd.), etc.

Using the thus measured L ^* ₁ , a ^* ₁ and b ^* ₁ of the base material, L ^* ₂ of the decorative layer, and chromaticity a ^* ₂ and b ^* ₂ , the color of the base material is determined by the following formula. The saturation (C ^* ₁ ), the saturation (C ^* ₂ ) of the decorative layer, the lightness difference (ΔL ^* ), the saturation difference (ΔC ^* ), and the color difference (ΔE ^* ab) were calculated.
C ^* ₁ = [(a ^* ₁ ) ² + (b ^* ₁ ) ² ] ^1/2
C ^* ₂ = [(a ^* ₂ ) ² + (b ^* ₂ ) ² ] ^1/2
ΔL ^* = L ^* ₂ - L ^* ₁
ΔC ^* = C ^* ₂ - C ^* ₁
ΔE ^* ab = [(L ^* ₂ - L ^* ₁ ) ² + (a ^* ₂ - a ^* ₁ ) ² + (b ^* ₂ - b ^* ₁ ) ² ] ^1/2

Next, the layers constituting the decorative material of the present invention will be explained using FIGS. 1 and 2.
FIG. 1 is a schematic sectional view showing a cross section of a decorative material 10 of the present invention, and it is shown that the decorative material 10 of the present invention has a base material 1 and a decorative layer 2. Further, FIG. 2 is a schematic cross-sectional view showing a cross section of a preferred embodiment of the decorative material 10 of the present invention, in which the base material 1 and the entire surface colored layer 21 ("solid layer") provided so as to cover the entire surface of the decorative material are shown. It is shown that a primer layer 4 and a surface protection layer 3 are provided in this order so as to cover the entire surface of the decorative layer 2 having a pattern layer 22 (also referred to as ".") and a pattern layer 22.
Each layer constituting the decorative material of the present invention will be explained in more detail below.

(Base material 1)
The base material needs to have a specific brightness difference, chroma difference, and color difference, that is, satisfy the above relational expressions (1) to (3) in relation to the decorative layer described later.
As the base material, as long as it satisfies the above relational expressions (1) to (3), materials that are normally used as base materials for decorative materials can be used without restriction, such as paper, nonwoven fabric or woven fabric, Representative examples include base materials made of resin, wood, metal, nonmetallic inorganic materials, and the like. There is no particular limit to the thickness of the base material, and a film, sheet, or plate-like material can be used as desired, but it is usually about 20 to 300 μm for a film or sheet, and 500 μm to 500 μm for a plate. A length of about 10 cm is used.

Examples of the paper base material include kraft paper, titanium paper, linter paper, parchment paper, glassine paper, parchment paper, resin-impregnated paper, thin paper, and Japanese paper. The base material of the non-woven fabric or woven fabric is composed of, for example, inorganic fibers such as glass fiber, alumina fiber, silica fiber, and carbon fiber, and organic fibers of various synthetic resins such as polyester resin, acrylic resin, polyethylene resin, and polypropylene resin. Examples include base materials such as nonwoven fabrics, woven fabrics, and composites thereof.

Examples of resins include polyolefin resins such as polypropylene, polyethylene, polyolefin thermoplastic elastomers, and ionomers, polyethylene terephthalate resins (PET), polybutylene terephthalate resins (PBT), polyethylene naphthalate resins (PEN), and ethylene glycol-terephthalic acid. - Polyester resins such as isophthalic acid copolymers and polyester thermoplastic elastomers, acrylic resins such as polymethyl (meth)acrylate, polybutyl (meth)acrylate, methyl (meth)acrylate-butyl (meth)acrylate copolymers, and polyester resins Examples include resin base materials made of thermoplastic resins such as polycarbonate resin, acrylonitrile-butadiene-styrene resin (hereinafter also referred to as "ABS resin"), and vinyl chloride resin.

Examples of the wood include wood base materials made of wood of various tree species such as cedar, cypress, pine, oak, lauan, teak, and rubber wood. The wood base material can be in the form of a film or sheet called veneer, or in the form of a board such as veneer, plywood, laminated wood, particle board, or fiberboard.
Examples of the metal include metal substrates made of iron, aluminum, copper, tin, titanium, alloys containing at least one of these metals (eg, carbon steel, stainless steel, duralumin, brass, bronze, etc.).
Furthermore, examples of non-metallic inorganic materials include cement, gypsum, calcium silicate, ceramics, and various ceramics.

The base material may be colored or uncolored (may be transparent), and if it is colored, there is no particular restriction on the manner of coloring, and it may be transparently colored, Opaque coloring (concealing coloring) may be used, and these can be selected arbitrarily.

When the base material is colored, examples of colorants include white pigments such as titanium white, inorganic pigments such as iron black, yellow lead, titanium yellow, Bengara, cadmium red, ultramarine blue, and cobalt blue; quinacridone red. , isoindolinone yellow, phthalocyanine blue, nickel-azo complex, azomethine azo black pigment, perylene black pigment, and other organic pigments or dyes; metal pigments made of flaky foil pieces of aluminum, brass, etc.; titanium dioxide-coated mica, bases Examples include coloring agents such as pearlescent pigments made of scaly foil pieces such as lead carbonate. For example, if the surface hue of the adherend to which the decorative sheet is attached varies and you want to hide the surface hue and improve the stability of the color tone of the decorative layer, you can use one of the above colorants. good.

In the case of coloring the resin, any of the following methods can be used: addition to the resin (kneading, kneading), formation by coating a paint film containing the resin and colorant, and the like. In the case of coloring paper, nonwoven fabrics, or woven fabrics, it can be carried out by any means such as mixing with pulp or fiber materials, or by forming a coating film, or by a combination of these methods.
In the case of coloring wood, it can be carried out by dyeing with a dye, forming a coating film, or a combination thereof. In the case of coloring metal, in addition to coating film formation, a decoloring method in which a metal oxide film is formed on the surface using an anodic oxidation method can be employed. In the case of non-metallic inorganic materials, it can be carried out by forming a coating film, adding it to the base material, or a combination thereof.

Additives may be added to the base material, if necessary. Examples of additives include inorganic substances such as calcium carbonate and clay, flame retardants such as magnesium hydroxide, antioxidants, lubricants, foaming agents, antioxidants, ultraviolet absorbers, and light stabilizers. The blending amount of the additive is not particularly limited as long as it does not impede the processing properties, and can be set as appropriate depending on the required properties.

From the viewpoint of improving the weather resistance of the decorative material of the present invention, among the above additives, it is preferable to use weathering agents such as ultraviolet absorbers and light stabilizers.
As the UV absorber, UV absorbers commonly used in cosmetic materials can be used without any particular restrictions, such as benzotriazole UV absorbers, benzophenone UV absorbers, triazine UV absorbers, and hydroxyphenyltriazine UV absorbers. agents, etc. As the light stabilizer, any light stabilizer commonly used in cosmetic materials can be used without particular limitation, and examples thereof include hindered amine light stabilizers such as piperidinyl sebacate light stabilizers. Further, these ultraviolet absorbers and light stabilizers may have a reactive functional group having an ethylenic double bond such as a (meth)acryloyl group, vinyl group, or allyl group in the molecule.
These UV absorbers, weathering agents such as light stabilizers, and other various additives can be used alone or in combination.

In the present invention, the above-mentioned base materials can be used alone or in combination. It may be a combination of multiple paper base materials, a paper base material and a fiber base material, a paper base material and a resin base material, a fiber base material and a resin base material, a paper base material, a fiber base material and a resin base material. It may also be a combination of materials. Furthermore, the resin base material may have either a single layer of the above resin or a multilayer structure of the same or different resins.

The shape of the base material is not particularly limited and may be selected as desired.For example, it may be flat, it may have a curved surface, or it may have a non-flat shape such as one with corners. It may be of. Although FIGS. 1 and 2 show a flat plate-shaped (also referred to as "sheet-shaped") decorative material, the shape of the decorative material of the present invention is not limited to this. In consideration of ease of manufacturing the decorative material, usage, processing characteristics, etc., it is preferable to have a flat plate shape.
The thickness of the base material is preferably 20 μm or more, more preferably 30 μm or more, and even more preferably 40 μm or more, mainly considering processing characteristics, ease of handling, etc. The upper limit is preferably 200 μm or less, more preferably 160 μm or less, and even more preferably 100 μm or less.

In order to improve interlayer adhesion between the base material and other layers, strengthen adhesion to various adherends, etc., the base material is subjected to physical treatments such as oxidation or roughening on one or both sides. A surface treatment such as a surface treatment or a chemical surface treatment can be performed.
Examples of the oxidation method include corona discharge treatment, chromium oxidation treatment, flame treatment, hot air treatment, ozone-ultraviolet treatment, etc., and examples of the roughening method include sandblasting, solvent treatment, and the like. These surface treatments are appropriately selected depending on the type of substrate, but corona discharge treatment is generally preferably used in terms of surface treatment effects and operability.
In addition, in order to improve interlayer adhesion between the base material and other layers, strengthen adhesion to various adherends, etc., treatments such as forming a primer layer on at least one surface of the base material are applied. It's okay.

(Decorative layer 2)
The decorative layer needs to have a specific brightness difference, chroma difference, and color difference in relation to the above-mentioned base material, that is, it is necessary to satisfy the above-mentioned relational expressions (1) to (3). Therefore, the decorative layer is not particularly limited as long as it satisfies the above relational expressions (1) to (3), and is usually provided so as to cover at least a portion of one surface of the base material. A layer that improves design by adding patterns to decorative materials.
In the decorative material of the present invention, the decorative layer may be a layer consisting only of a pattern layer provided to form a pattern so as to cover a part of one side of the base material, or It may be a layer consisting only of a full-surface colored layer provided so as to cover the entire surface of one side, or it may be a layer consisting of a combination of the pattern layer and a full-surface colored layer. From the viewpoint of expressing a higher design quality, the decorative layer is preferably a layer composed of a pattern layer and an entirely colored layer. In this case, the decorative material of the present invention preferably has a base material, a full-surface colored layer, and a pattern layer in this order, and the pattern layer may be one layer or two or more layers.

The pattern imparted by the decorative layer may be selected as desired without any particular limitations, and includes, for example, wood grain patterns, marble patterns (for example, travertine marble patterns), stones imitating rock surfaces such as cleavage planes of granite plates, etc. Grain pattern, fabric pattern that imitates cloth grain or cloth-like pattern, leather pattern that expresses the grain of leather, tiling pattern, brickwork pattern, hairline, line groove, satin finish, sand grain, letters, Examples include symbols, geometric patterns, and patterns that combine these, such as marquetry and patchwork. Further, examples of patterns that are a combination of these include, for example, patterns such as so-called artificial marble, which are artificial stones that are made by mixing crushed stone such as marble with white cement, solidifying it, and polishing it to give it a marble-like finish.
Consumers' requests for designs change depending on trends, etc., but wood grain patterns remain popular, so wood grain patterns are also preferred as the pattern for the decorative material of the present invention. The wood grain pattern includes a straight grain pattern, a board grain pattern, a heather grain pattern, a wood grain pattern, etc., and any of them may be used.

For forming the decorative layer, it is preferable to use a resin composition containing at least a binder resin and colorants such as pigments and dyes, and other components used as desired, such as matting agents, extender pigments, stabilizers, etc. An appropriate mixture of a UV absorber, an ultraviolet absorber, a light stabilizer, a solvent, etc. can be used. That is, the decorative layer is a layer that contains at least a binder resin and a coloring agent such as a pigment and a dye, and may also contain other components that are used as desired according to the above-mentioned wishes.

There are no particular restrictions on the binder resin, and examples include urethane resin, acrylic polyol resin, acrylic resin, polyester resin, alkyd resin, amide resin, butyral resin, styrene resin, urethane-acrylic copolymer, vinyl chloride-vinyl acetate copolymer. Preferred examples include resins such as polymer resin, vinyl chloride-vinyl acetate-acrylic copolymer resin, nitrocellulose resin (nitrified cotton), and cellulose acetate resin. Furthermore, a curable resin such as a two-component curable resin containing polyol as a main ingredient and isocyanate as a curing agent may also be used. These can be used alone or in combination.

Examples of coloring agents such as pigments and dyes that can be used in the decorative layer include the same coloring agents such as pigments and dyes that can be used in the above-mentioned base material. You can select it as appropriate.

Furthermore, in the present invention, from the viewpoint of further improving the design, it is preferable that the decorative layer contains a matting agent among the above-mentioned other components that may be used as desired.
As matting agents, inorganic fillers such as silica, clay, heavy calcium carbonate, light calcium carbonate, precipitated barium sulfate, calcium silicate, synthetic silicate, and silicate fine powder; acrylic resin, urethane resin, nylon Examples include organic fillers such as resins, polypropylene resins, and urea resins.

When the decorative layer contains a matting agent, the decorative layer has a lower gloss, so it is possible to express a design with a visual unevenness due to the difference in gloss.
For example, regarding the wood grain pattern exemplified as a preferred pattern, the wood grain pattern includes a conduit part with a lower gloss (matte or low gloss), a spring wood part with a higher gloss (glossy or high gloss), and a fall wood part with a higher gloss. There are parts (shiny parts), etc. In the decorative layer, a combination of multiple pattern layers, such as a pattern layer forming a conduit portion with lower gloss, a pattern layer forming a spring wood portion with higher gloss, and a pattern layer forming a higher gloss autumn wood portion, etc. This makes it possible to form highly decorative patterns. In this case, it is also possible to increase the difference in gloss from the pattern layer and improve the design, for example, by not containing a matting agent in the entire colored layer, or by making the content lower than that in the pattern layer. It is.

The volume average particle diameter of these matting agents is preferably 0.5 to 25 μm, more preferably 1 to 15 μm, and even more preferably 3 to 10 μm.
Further, the content of the matting agent per 100 parts by mass of the binder resin in the decorative layer is preferably 0.5 parts by mass or more, more preferably 1 part by mass or more, still more preferably 2 parts by mass or more, and the upper limit is The amount is usually 100 parts by mass or less, preferably 50 parts by mass or less, more preferably 20 parts by mass or less, even more preferably 10 parts by mass or less. When the content of the matting agent is within the above range, the decorative layer becomes visible as a layer with lower gloss, so it becomes possible to improve the visual unevenness caused by the difference in gloss, and the resin composition Since the coating performance is improved without the thixotropy becoming extremely high, the design quality is improved as a result.

The decorative layer may contain weathering agents such as ultraviolet absorbers and light stabilizers from the viewpoint of improving weather resistance. Examples of the ultraviolet absorber and light stabilizer include those that can be included in the base material, and they may be appropriately selected from these depending on the desired pattern.

The thickness of the decorative layer may be appropriately selected depending on the desired pattern, and is preferably 0.5 μm or more, more preferably 1 μm or more, even more preferably 2 μm or more, and the upper limit is preferably 15 μm or less, more preferably It is 10 μm or less, more preferably 8 μm or less.

(Surface protective layer 3)
The surface protective layer is a layer provided on the entire surface of the decorative material of the present invention so as to cover the base material and the decorative layer, and protects each layer constituting the decorative material of the present invention, and as a result, the decorative material of the present invention This is a protective layer.
The surface protective layer may be composed of either a thermoplastic resin or a curable resin, and from the viewpoint of protecting the decorative material of the present invention and obtaining surface properties such as better stain resistance and abrasion resistance, It is preferable that the layer is made of a curable resin, more specifically a layer made of a cured product of a curable resin. Alternatively, the layer may be composed of a thermoplastic resin and a curable resin in combination.

Examples of the thermoplastic resin include acrylic resin, polyester resin, unsaturated polyester resin, vinyl chloride-vinyl acetate copolymer resin, polyester urethane resin, thermoplastic (non-crosslinked) urethane resin, and the like.

As the curable resin, curable resins such as thermosetting resins, two-component curable resins, and ionizing radiation curable resins can be used, and the physical unevenness and visual unevenness improve tactility and design. Ionizing radiation-curable resins are preferred from the viewpoint of improving the stain resistance and wear resistance of the decorative material of the present invention.

Examples of thermosetting resins include acrylic resins, urethane resins, phenol resins, urea-melamine resins, epoxy resins, unsaturated polyester resins, and silicone resins. A curing agent is added to the thermosetting resin as necessary.
Two-component curable resins include two-component urethane resins containing a polyol compound as a main ingredient and an isocyanate compound as a curing agent, two-component epoxy resins, two-component urethane-modified acrylic resins, and two-component polyester resins. Can be mentioned.

An ionizing radiation-curable resin is a resin that is crosslinked and cured by irradiation with ionizing radiation, and has an ionizing radiation-curable functional group. Here, the ionizing radiation-curable functional group is a group that is crosslinked and cured by irradiation with ionizing radiation, and preferably includes functional groups having an ethylenic double bond such as a (meth)acryloyl group, a vinyl group, and an allyl group. It will be done. In addition, ionizing radiation refers to electromagnetic waves or charged particle beams that have energy quantum that can polymerize or crosslink molecules, and ultraviolet rays (UV) or electron beams (EB) are usually used, but other It also includes electromagnetic waves such as X-rays and γ-rays, and charged particle beams such as α-rays and ion beams.
Specifically, the ionizing radiation-curable resin can be appropriately selected from polymerizable monomers and polymerizable oligomers that have been conventionally used as ionizing radiation-curable resins.

As the polymerizable monomer, (meth)acrylate monomers having a radically polymerizable unsaturated group in the molecule are preferred, and polyfunctional (meth)acrylate monomers are particularly preferred. Here, "(meth)acrylate" means "acrylate or methacrylate."
Examples of polyfunctional (meth)acrylate monomers include (meth)acrylate monomers having two or more ionizing radiation-curable functional groups in the molecule and having at least a (meth)acryloyl group as the functional group, From the viewpoint of protecting the decorative material and further improving surface properties such as stain resistance and abrasion resistance, acrylate monomers having an acryloyl group are preferred.
Further, from the same viewpoint, the number of functional groups is preferably 2 or more, and the upper limit is preferably 8 or less, more preferably 6 or less, still more preferably 4 or less, particularly preferably 3 or less. These polyfunctional (meth)acrylates may be used alone or in combination.

Such polymerizable monomers include bifunctional (meth)acrylates such as ethylene glycol di(meth)acrylate, bisphenol A tetraethoxy diacrylate, bisphenol A tetrapropoxy diacrylate, and 1,6-hexanediol diacrylate; trimethylol; Propane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, Preferred examples include trifunctional or higher functional (meth)acrylates such as isocyanuric acid-modified tri(meth)acrylates.

Examples of the polymerizable oligomer include (meth)acrylate oligomers having two or more ionizing radiation-curable functional groups in the molecule and at least a (meth)acryloyl group as the functional group. For example, urethane (meth)acrylate oligomer, epoxy (meth)acrylate oligomer, polyester (meth)acrylate oligomer, polyether (meth)acrylate oligomer, polycarbonate (meth)acrylate oligomer, acrylic (meth)acrylate oligomer, polycaprolactone urethane (meth)acrylate oligomer, ) acrylate oligomer, polycaprolactone diol urethane (meth)acrylate, etc.

From the viewpoint of protecting the decorative material and further improving surface properties such as stain resistance and abrasion resistance, the number of functional groups in these polymerizable oligomers is preferably 2 or more, preferably 8 or less as an upper limit, and more preferably 8 or less. It is preferably 6 or less, more preferably 4 or less, particularly preferably 3 or less.
Further, from the same viewpoint, it is preferably 500 or more, more preferably 1,000 or more, and the upper limit is preferably 80,000 or less, more preferably 50,000 or less. In this specification, the weight average molecular weight is an average molecular weight measured by GPC analysis and converted to standard polystyrene.

The surface protective layer may optionally contain weathering agents such as ultraviolet absorbers and light stabilizers, ultraviolet shielding agents, abrasion resistance improvers, polymerization inhibitors, crosslinking agents, Infrared absorbers, antistatic agents, adhesion improvers, leveling agents, thixotropic agents, coupling agents, plasticizers, antifoaming agents, fillers, antiblocking agents, lubricants, solvents, etc. can be added. Among these, it is preferable to contain weathering agents such as ultraviolet absorbers and light stabilizers.
The ultraviolet absorber and light stabilizer may be appropriately selected from the ultraviolet absorbers and light stabilizers listed as examples that can be used in the base material.

The thickness of the surface protective layer is preferably 1 μm or more, more preferably 1 μm or more, considering the protection of the decorative material, the improvement of surface properties such as stain resistance and abrasion resistance, and the ease of forming the surface protective layer. is 2 μm or more, more preferably 3 μm or more, and the upper limit is preferably 10 μm or less, more preferably 8 μm or less, and still more preferably 5 μm or less.

(Primer layer 4)
The primer layer is a layer provided mainly to improve the interlayer adhesion of each layer constituting the decorative material of the present invention. As shown in FIG. 2, by being provided between the decorative layer and the surface protection layer, for example, the interlayer adhesion between these layers can be improved, and it also has the function of protecting the decorative layer. Although FIG. 2 shows an embodiment in which the primer layer is provided between the decorative layer and the surface protection layer, the primer layer is not limited to this, and may be provided between the base material and the decorative layer, for example.

For forming the primer layer, it is preferable to use a resin composition containing at least a binder resin, and other components used as desired, such as extender pigments, stabilizers, ultraviolet absorbers, light stabilizers, and solvents, as appropriate. A mixture can be used. That is, the primer layer is a layer that contains at least a binder resin, and may also contain other components that are used as desired according to the above-mentioned requirements.

As the binder resin used for forming the primer layer, the same binder resins as those that can be used for forming the above-mentioned decorative layer can be exemplified, and the binder resin may be appropriately selected from these as desired.

The thickness of the primer layer is preferably 0.1 μm or more, more preferably 1 μm or more, and even more preferably 2 μm or more, from the viewpoint of efficiently protecting the decorative layer and improving interlayer adhesion, and the upper limit is preferably It is 10 μm or less, more preferably 8 μm or less, even more preferably 5 μm or less.

(resin layer)
The decorative material of the present invention may have a resin layer (not shown). By providing the resin layer, it is expected that the decorative layer will be protected and the surface properties of the decorative material of the present invention, such as stain resistance and abrasion resistance, will be improved. Therefore, the resin layer is preferably provided on the surface side of the decorative layer (the side opposite to the base material side of the decorative layer), and when the above-mentioned surface protective layer is provided, between the decorative layer and the surface protective layer.

Preferred examples of the resin constituting the resin layer include polyolefin resin, polyester resin, acrylic resin, polycarbonate resin, polyurethane resin, polystyrene resin, vinyl chloride resin, and vinyl acetate resin. Among these, from the viewpoint of improving surface properties, polyolefin resins and polyester resins are preferred, and polyolefin resins are more preferred. Examples of the polyolefin resin include the resins exemplified as those that can constitute the base sheet, and among them, polypropylene resin is preferable.

The resin layer is preferably transparent from the viewpoint of making the decorative layer more clearly visible. Here, transparent includes not only colorless and transparent but also colored and translucent. In addition, when it is colored, as the coloring agent, the coloring agents exemplified as the coloring agents that can be used in the above-mentioned decorative layer are preferably mentioned, and it is preferable to use a coloring agent having the same color as the decorative layer.

The resin layer may be blended with additives as necessary, for example, the additives listed as additives that can be blended into the base material, among them weathering agents such as ultraviolet absorbers and light stabilizers, are used. It is preferable. In addition, similar to weathering agents that can be included in the base sheet, UV absorbers that have reactive functional groups with ethylenic double bonds such as (meth)acryloyl groups in their molecules, and UV absorbers that have reactive functional groups such as (meth)acryloyl groups in their molecules A light stabilizer having a reactive functional group having an ethylenic double bond may also be used. The amount of the additive added is not particularly limited and can be set as appropriate depending on the required characteristics and the like.

The thickness of the resin layer is preferably 10 μm or more and 150 μm or less, more preferably 30 μm or more and 120 μm or less, and even more preferably 50 μm or more and 100 μm or less, from the viewpoint of protecting the decorative layer and improving surface properties. Further, from the viewpoint of protecting the decorative layer and obtaining excellent surface properties, it is preferable to make the layer thicker than the base material.

Like the base material, the resin layer can be subjected to surface treatment such as physical surface treatment or chemical surface treatment on one or both surfaces thereof in order to improve interlayer adhesion with other layers.
Further, in order to improve interlayer adhesion between the resin layer and other layers, a treatment such as forming a primer layer on one or both sides of the resin layer may be performed. This primer layer is as described above.

(Adhesive layer)
The decorative material of the present invention may have an adhesive layer if necessary. In particular, when the decorative material of the present invention has the above-mentioned resin layer, it is effective to provide an adhesive layer when improving the interlayer adhesion between the resin layer and the decorative layer. As the adhesive constituting the adhesive layer, any adhesive commonly used in decorative sheets can be used without limitation.

Examples of the adhesive include urethane adhesives, acrylic adhesives, epoxy adhesives, rubber adhesives, etc. Among them, urethane adhesives are preferred in terms of adhesive strength. Examples of urethane adhesives include adhesives using two-component curable urethane resins containing various polyol compounds such as polyether polyols, polyester polyols, and acrylic polyols, and curing agents such as the various isocyanate compounds mentioned above. can be mentioned. Furthermore, acrylic-polyester-vinyl acetate resins and the like are also suitable adhesives that easily develop adhesive properties when heated and can maintain adhesive strength even when used at high temperatures.

From the viewpoint of obtaining sufficient adhesiveness, the thickness of the adhesive layer is preferably 0.1 μm or more and 30 μm or less, more preferably 1 μm or more and 15 μm or less, and even more preferably 2 μm or more and 10 μm or less.

(Method for manufacturing decorative materials)
Regarding the manufacturing method of the decorative material of the present invention, one of the preferable embodiments of the decorative material of the present invention is shown in FIG. The manufacturing method will be explained by taking as an example a decorative material having a surface protective layer in sequence.

The decorative material of the present invention includes, for example, a step of providing a colored layer and a pattern layer on the entire surface of the base material, forming a decorative layer, a step of forming a primer layer to cover the decorative layer, and a step of coating the primer layer. It can be manufactured by sequentially performing the steps of forming a surface protective layer.

The process of forming a decorative layer is to first apply a resin composition used to form a full-surface colored layer onto the base material to form a desired full-surface colored layer, and then apply a resin composition used to form a pattern layer. to form a pattern layer. The resin composition is applied by a known method such as a gravure printing method, a bar coating method, a roll coating method, a reverse roll coating method, or a comma coating method, preferably by a gravure printing method.

When surface-treating the base material, it may be carried out before forming a colored layer on the entire surface, and when providing a primer layer, it may be carried out before forming a colored layer on the entire surface. Further, when a back primer layer is provided on the surface (back surface) opposite to the surface on which the decorative layer is provided of the base material, it may be provided either before or after the formation of the decorative layer.

When providing a resin layer, the resin layer may be formed after forming the decorative layer. The resin layer is formed by forming the above-mentioned decorative layer, applying an adhesive as necessary on the decorative layer to form an adhesive layer, and then applying the resin composition constituting the resin layer by extrusion lamination, dry lamination, or wet lamination. It can be formed by laminating and adhering and press-bonding by a method such as , thermal lamination or the like.

Next, in the step of forming a primer layer to cover the decorative layer, the resin composition used for forming the primer layer may be applied to the surface of the decorative layer. The method may be selected and adopted as appropriate depending on the method of coating the resin composition to be formed. Furthermore, when a resin layer is provided, a primer layer may be formed on the resin layer.

Formation of the surface protective layer is carried out by applying a curable resin composition, preferably containing a liquid uncured product of a curable resin, to the entire surface of the decorative material and curing it as necessary. I will do it.
As a method for applying the uncured resin composition containing the liquid uncured material, any of the known methods exemplified as the method for applying the resin composition for the decorative layer may be employed.
Furthermore, the method for curing the uncured resin composition containing the liquid uncured material of the curable resin may be selected depending on the type of curable resin contained in the uncured resin composition. For example, when the uncured resin composition is a resin composition containing a liquid uncured thermosetting resin, it may be cured by performing a heat treatment depending on the thermosetting resin used.

When using an uncured resin composition containing a liquid uncured ionizing radiation resin, the uncured resin layer formed by applying the uncured resin composition is irradiated with ionizing radiation such as electron beams and ultraviolet rays. It may be made into a cured product. When using an electron beam as the ionizing radiation, the accelerating voltage can be appropriately selected depending on the resin used and the thickness of the layer, but it is usually possible to cure the uncured resin layer at an accelerating voltage of about 70 to 300 kV. preferable. The irradiation dose is preferably an amount that saturates the crosslinking density of the ionizing radiation-curable resin, and is usually selected in the range of 5 to 300 kGy (0.5 to 30 Mrad), preferably 10 to 50 kGy (1 to 5 Mrad).
There are no particular limitations on the electron beam source; for example, various electron beam accelerators such as a Cockroft-Walton type, a Vandegraft type, a resonant transformer type, an insulated core transformer type, a linear type, a dynamitron type, and a high frequency type are used. be able to.
Furthermore, when ultraviolet rays are used as ionizing radiation, those containing ultraviolet rays with a wavelength of 190 to 380 nm are emitted. There are no particular restrictions on the ultraviolet light source, and for example, a high pressure mercury lamp, a low pressure mercury lamp, a metal halide lamp, a carbon arc lamp, etc. can be used.

Further, after forming the surface protective layer, if necessary, an uneven shape can be imparted by heating and pressure molding using an embossing plate. By forming the uneven shape, a tactile sensation is imparted and the design of the decorative material of the present invention is improved. Further, for example, when forming a wood grain pattern in the decorative layer, by aligning the conduit portion in the wood grain pattern with the concave and convex shaped recesses, it is possible to express an excellent design with a high texture.

The conditions for heating and pressure molding may be adjusted as appropriate depending on the type of curable resin used, and are not particularly limited, but are usually at a temperature of 100 to 200°C and a pressure of 0.1 to 9.8 MPa. The time is from 10 seconds to 120 minutes.

(Applications for decorative materials)
The decorative material of the present invention is a decorative material with high designability that can suppress deterioration in designability even if the decorative layer or the like peels off due to friction, impact, etc. during transportation. Therefore, the decorative material of the present invention can be used for various purposes as it is, by being laminated onto an adherend via an adhesive layer, or by being subjected to a predetermined molding process.
For example, it can be laminated onto adherends such as flat plates, curved plates, etc., sheets (or films) made of various materials, and used as interior parts of buildings such as walls, ceilings, and floors, or as exterior parts such as external walls and roofs. In addition to window frames, various doors such as entrance doors, handrails, baseboards, surrounding edges, window frames, door frames, fittings and fixtures such as moldings, decorative surface panels for cabinets such as kitchens, furniture, light electrical appliances, OA equipment, etc. , it can be used for interior or exterior members of vehicles, etc.

Examples of adherends include board materials such as wood veneers made of various woods such as cedar, cypress, pine, and lauan, wood plywood, particle boards, and wood fiberboards such as MDF (medium density fiberboard), and three-dimensional objects. Wooden materials used as iron, aluminum plates, steel plates, three-dimensional objects, sheets, etc.; Glass, ceramics such as ceramics, non-cement ceramic materials such as plaster, ALC (lightweight cellular concrete) ) Ceramic members used as plate materials such as non-ceramic ceramic materials such as plates and three-dimensional shaped articles; Polyolefin resins such as acrylic resin, polyester resin, polystyrene resin, polypropylene, ABS (acrylonitrile-butadiene-styrene copolymer) resin Examples include plate materials such as phenolic resin, vinyl chloride resin, cellulose resin, and rubber, three-dimensional articles, and resin members used as sheets. Further, these members can be used alone or in combination.

The adhesive used in the adhesive layer is not particularly limited, and any known adhesive can be used, and preferred examples include adhesives such as heat-sensitive adhesives and pressure-sensitive adhesives. Examples of resins used for the adhesive constituting this adhesive layer include acrylic resin, polyurethane resin, vinyl chloride resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer resin, styrene-acrylic copolymer resin, and polyester resin. , polyamide resin, etc., and these can be used alone or in combination. Furthermore, a two-component curing type polyurethane adhesive or polyester adhesive using an isocyanate compound or the like as a curing agent may also be used.
Moreover, an adhesive can also be used for the adhesive layer. As the adhesive, an acrylic adhesive, a urethane adhesive, a silicone adhesive, a rubber adhesive, or the like can be appropriately selected and used.

The adhesive layer is formed by applying the above resin in a coatable form such as a solution or emulsion using a gravure printing method, a screen printing method, or a reverse coating method using a gravure plate, and drying it. can do.
The thickness of the adhesive layer is not particularly limited, but from the viewpoint of obtaining excellent adhesiveness, it is preferably 1 μm or more and 100 μm or less, more preferably 5 μm or more and 50 μm or less, and even more preferably 10 μm or more and 30 μm or less.

Next, the present invention will be explained in more detail with reference to examples, but the present invention is not limited to these examples in any way.

(Evaluation and observation method)
1. Measurement of lightness (L ^* ), chromaticity (a ^* ), and chromaticity (b ^* ) of the base material and decorative layer For any one point of the base material used in each example and comparative example, Konica Minolta Holdings, Inc. Using a spectrophotometer (product name: CM-3500d), in accordance with JIS Z8781-4:2013, the brightness of the CIE (Commission Internationale de l'Eclairage) L ^* a ^* b ^* color system (L ^* ₁ ), Chromaticity (a ^* ₁ ) and chromaticity (b ^* ₁ ) were measured. Measured values were taken in SCI mode. The measurement results are summarized in Table 1.
In addition, the lightness (L ^* ₂ ), chromaticity (a ^* ₂ ), and chromaticity (b ^* ₂ ) of the decorative layer of the decorative materials obtained in each Example and Comparative Example were measured by the following methods.
First, the decorative material (size: 100 cm x 100 cm) obtained in each example and comparative example was divided into 100 parts (size per divided sheet: 10 cm x 10 cm), and any 20 of the divided sheets were For each, lightness (L ^* ), chromaticity (a ^* ), and chromaticity (b ^* ) were measured at 50 arbitrary locations in the same manner as the above method. The average value of the measured values is taken as the lightness (L ^* ), chromaticity (a ^* ), and chromaticity (b ^* ) of each of the divided sheets, and the lightness (L ^* ) and chromaticity (of each of the 20 divided sheets) are The average values of a ^* ) and chromaticity (b ^* ) were taken as the lightness (L ^* ₂ ), chromaticity (a ^* ₂ ), and chromaticity (b ^* ₂ ) of the decorative layer, respectively. When measuring brightness (L ^* ), chromaticity (a ^* ), and chromaticity (b ^* ), the light incident angle was 10 degrees, and a D65 light source was used as the light source.
The lightness (L ^* ₁ ), chromaticity (a ^* ₁ ) and chromaticity (b ^* ₁ ) of the base material measured as above, and the lightness (L* ₂ ) and chromaticity ( ^{a* 2} ₎ of the decorative layer. ), chromaticity (b ^* ₂ ), and calculate the saturation of the base material (C ^* ₁ ), the saturation of the decorative layer (C ^* ₂ ), the lightness difference (ΔL ^* ), and the saturation difference ( ΔC ^* ) and color difference (ΔE ^* ab) were calculated.
C ^* ₁ = [(a ^* ₁ ) ² + (b ^* ₁ ) ² ] ^1/2
C ^* ₂ = [(a ^* ₂ ) ² + (b ^* ₂ ) ² ] ^1/2
ΔL ^* = L ^* ₂ - L ^* ₁
ΔC ^* = C ^* ₂ - C ^* ₁
ΔE ^* ab = [(L ^* ₂ - L ^* ₁ ) ² + (a ^* ₂ - a ^* ₁ ) ² + (b ^* ₂ - b ^* ₁ ) ² ] ^1/2

Example 1
A colored single-layer PET sheet (thickness: 45 μm) for building materials that has been treated for easy adhesion is prepared as a base material, and the brightness (L ^* ₁ ), chromaticity (a ^* ₁ ), and color of the base material are determined by the above method. The degree (b ^* ₁ ) was measured. As a result of the measurement, the lightness (L ^* ₁ ) of the PET sheet was 81.8, the chromaticity (a ^* ₁ ) was 4.0, and the chromaticity (b ^* ₁ ) was 16.5. The measurement results are shown as those for base material 1 in Table 1.
A full colored layer (thickness: 5 μm) was formed on the base sheet using ink for the full colored layer (binder resin: acrylic urethane resin, coloring agent: titanium white, Bengara, yellow lead, carbon black). Then, a pattern layer (thickness: 5 μm, decoration shown in Table 2) exhibiting a wood grain pattern was created using ink for the pattern layer (binder resin: nitrocellulose/alkyd resin, coloring agent: quinacridone, isoindolinone, phthalocyanine, and carbon black). Layer 4) was formed to obtain a decorative material.
Regarding the obtained decorative material, the lightness (L ^* ₂ ), chromaticity (a ^* ₂ ), and chromaticity (b ^* ₂ ) of the decorative layer were measured by the above method, and the results were 65.3, 7, and 19, respectively. It became .3. From the measurement results of the brightness of the base material and the brightness of the decorative layer, the difference in brightness (ΔL ^* ), the difference in chroma (ΔC ^* ), and the difference in color (ΔE ^* ab) are calculated to be -9.5 and 7.2, respectively. , 11.9. These values are summarized in Tables 2 and 3. Moreover, when the above-mentioned design evaluation was performed on the obtained decorative material, the evaluation was B.

Examples 2 to 33, Comparative Examples 1 to 23
In Example 1, a decorative material was produced in the same manner as in Example 1, except that the base material and decorative layer were as shown in Tables 3 and 4. Here, the base material and decorative layer shown in Tables 3 and 4 have the lightness (L ^* ₁ ), chromaticity (a ^* ₁ ), chromaticity (b ^* ₁ ), and lightness ( L ^* ₂ ), chromaticity (a ^* ₂ ), and chromaticity (b ^* ₂ ).
The lightness difference (ΔL ^* ), chroma difference (ΔC ^* ), and color difference (ΔE ^* ab) of the decorative materials obtained in each example and comparative example are as shown in Tables 3 and 4. Furthermore, the decorative boards obtained in each Example and Comparative Example were evaluated as described above, and the results are shown in Tables 3 and 4.

From the results of the examples, the decorative material of the present invention has a brightness difference (ΔL ^* ), a chroma difference (ΔC ^* ), and a color difference (ΔE ^* ab) within predetermined ranges, thereby reducing friction, impact, etc. during transportation. It was confirmed that this is a decorative material with high designability that can suppress deterioration in designability even if the decorative layer etc. peels off. For example, in Examples 11 to 15, 17 to 19, 21 to 23, and 25, the gray base materials of Base Materials 5 to 10 were used as the base materials, and the decorative layers were brown wood grain patterns 1 to 6. Although the color combinations of the decorative layer and the decorative layer were completely different from each other, the design was highly evaluated. Further, Examples 9 and 10 in which, for example, base materials 1 to 4 and 11 to 15 of beige, orange, brown, etc. were used as the base materials, and the decorative layers were made with dark wood grain patterns 7 to 9 such as gray. and No. 33 also had high evaluations of design, although the color combinations of the base material and decorative layer were completely different from each other.
On the other hand, according to the comparative example, if any of the brightness difference (ΔL ^* ), the chroma difference (ΔC ^* ), and the color difference (ΔE ^* ab) is outside the predetermined range, it is difficult to suppress the deterioration of the design quality. It was confirmed that this is not possible.
For example, as in Patent Document 2, the smaller the difference in lightness (ΔL ^* ), the difference in chroma (ΔC ^* ), the difference in color (ΔE ^* ab), etc. between the base material and the decorative layer (the closer to 0), the more the difference during transportation. It was generally believed that even if the decorative layer or the like peels off due to rubbing, impact, etc., the deterioration in design can be suppressed. However, from the above examples, it was confirmed that in the decorative material of the present invention, even if these differences are not small, it is possible to suppress the deterioration in design.

10. Decorative materials 1. Base material 2. Decorative layer 21. Full-surface colored layer 22. Picture layer 3. Surface protective layer 4. primer layer

Claims (8)

A decorative material having a base material and a decorative layer,
The lightness (L ^* ₁ ) of the base material and the lightness (L ^* ₂ ) of the decorative layer satisfy the following relational expression (1),
The saturation (C ^* ₁ ) of the base material and the saturation (C ^* ₂ ) of the decorative layer satisfy the following relational expression (2),
and the color difference (ΔE ^* ab) between the base material and the decorative layer satisfies the following relational expression (3),
Decorative materials.
Relational expression (1) -15≦L ^* ₂ -L ^* ₁ ≦10
Relational expression (2) -8≦C ^* ₂ -C ^* ₁ ≦25
Relational expression (3) 15.1≦ΔE ^* ab≦33.0
(The lightness (L ^* ₂ ) of the decorative layer means the lightness measured from the side of the base material on which the decorative layer is provided in the decorative material.)
(The chroma (C ^* ₂ ) of the decorative layer is determined from the chromaticity (a ^* ₂ ) and chromaticity (b ^* ₂ ) measured from the side of the base material in the decorative material on which the decorative layer is provided. (Means the calculated value.)
(The color difference (ΔE ^* ab) is calculated by combining "the lightness (L ^* ₁ ) of the base material, the chromaticity (a* ₁ ) of the base material, the chromaticity (b*1) of the base material" and "the lightness (L ^* 1) of the base material, the chromaticity (b ^* ₁ ) of the base material" (means the value calculated from "L ^* ₂ , a ^* ₂ , b ^* ₂ ") The decorative material according to claim 1, which satisfies the following relational expression (1a) or (1b).
Relational expression (1a) -14≦L ^* ₂ -L ^* ₁ ≦-0.1
Relational expression (1b) 1≦L ^* ₂ -L ^* ₁ ≦9 The decorative material according to claim 1 or 2, which satisfies the following relational expression (2a) or (2b).
Relational expression (2a) -8≦C ^* ₂ -C ^* ₁ ≦-1
Relational expression (2b) 3≦C ^* ₂ -C ^* ₁ ≦23 The decorative material according to any one of claims 1 to 3, wherein the decorative layer has a full-surface colored layer and a pattern layer. The decorative material according to claim 4, comprising the base material, the full-surface colored layer, and the pattern layer in this order. The decorative material according to any one of claims 1 to 5, further comprising a surface protective layer in the order of the base material, the decorative layer, and the surface protective layer. The decorative material according to claim 6, wherein the surface protective layer is made of a cured product of an ionizing radiation-curable resin composition. The decorative material according to claim 4 or 5, further comprising an adherend on a surface of the base material opposite to the surface having the pattern layer, with an adhesive layer interposed therebetween.