JP2022057421A - Decorative material - Google Patents

Abstract

To provide a decorative material that gives a tactile feeling different from conventional ones.SOLUTION: A decorative material includes a base material and an irregularity imparting layer with a plurality of projections containing particles arranged on one face side of the base material. The projections respectively have a shape in which a volume at a portion on a base material side is larger than a volume at a portion on a top side. The particles include at least two kinds having different average particle diameters. In a plane view of the irregularity imparting layer, the particles with the larger average particle diameter of the two kinds of particles are included only in a range of the top side in a projection.SELECTED DRAWING: Figure 2

Description

The present invention relates to a decorative material.

Decorative materials are used on the surfaces of building materials, furniture, electric appliances, vehicle interior materials, and the like to impart designability. In order to enhance the design of the decorative material, a wood grain pattern, a stone grain pattern, a cloth grain pattern, a leather grain pattern, a geometric pattern, an abstract pattern, or the like may be applied as a printing pattern. Then, it has been proposed that the decorative material imparts an uneven appearance and a tactile sensation by forming a printed pattern with a thick film in order to further enhance the design (see, for example, Patent Document 1 and Patent Document 2).

Japanese Unexamined Patent Publication No. 2020-44817 Japanese Unexamined Patent Publication No. 2018-171771

In recent years, with increasing consumer preference for luxury or various needs, more complicated designs such as reproducibility are required, and it is necessary to meet stricter demands. Although the decorative material having a convex portion as in Patent Document 1 and Patent Document 2 has a peculiar design property, a material different from this or further suppressed in monotony is required. I came.

Therefore, in view of the above points, it is an object of the present disclosure to provide a decorative material having a different tactile sensation than before.

One aspect of the present disclosure comprises a base material and an unevenness-imparting layer in which a plurality of convex portions containing particles are arranged on one surface side of the base material, and the convex portions are portions on the base material side. The volume is larger than the volume of the top side portion, and the particles are provided with at least two types having different average particle diameters, and when the unevenness-imparting layer is viewed in a plan view, the average of the two types of particles is provided. The particles having a large particle diameter are decorative materials that are contained only in the area on the top side of the convex portion.

The convex portion may have a shape in which two steps are formed on the base material side and the top side.

According to the decorative material of the present disclosure, the tactile sensation is different from the conventional one.

FIG. 1 is a perspective view schematically showing a part of the decorative material 10. FIG. 2 is a cross-sectional view schematically showing a part of the decorative material 10. FIG. 3 is a cross-sectional view showing another example of the decorative material 10. FIG. 4 is a plan view and a cross-sectional view of the decorative material 10'.

Hereinafter, each form will be described with reference to the drawings. The present invention is not limited to these forms. In the drawings shown below, the size and ratio of the members may be changed or exaggerated for the sake of clarity. In addition, for the sake of readability, illustrations of parts that are not necessary for explanation and reference numerals that are repeated may be omitted.

[Form of decorative material]
FIG. 1 is an enlarged perspective view of a part of the decorative material 10 according to one form, with the unevenness-imparting layer 12 side facing up (+ z direction). FIG. 2 shows a cross-sectional view of the decorative material 10 as viewed from the direction shown in FIG. 1 II. Note that FIG. 1 is a schematic diagram and a conceptual diagram, and the specific shape of the actual decorative material is not always as shown in FIG. Further, in FIGS. 2 to 4, the cut surface is not hatched for easy viewing. For convenience, arrows (x, y, z) indicating directions, that is, a coordinate system, are also shown in the figures shown below. Here, the xy direction is the in-plane direction of the decorative material 10, and the z direction is the thickness direction.
As can be seen from FIGS. 1 and 2, in the present embodiment, the decorative material 10 has the base material 11 and the unevenness-imparting layer 12 provided on one surface of the base material 11.
When the decorative material 10 expresses the appearance of a wood grain pattern, the wood for which the design is to be reproduced by the decorative material is not particularly limited, and examples thereof include cedar, cypress, walnut, pine, and cherry blossoms.
Hereinafter, each configuration will be described in detail.

<Base material>
The form of the base material 11 may be any of a film, a sheet, a flat plate, a curved plate and the like. The base material 11 is not particularly limited as long as it is usually used as a decorative material, and a resin base material, a metal base material, a ceramic base material, a fibrous base material, a wood base material, or the like can be used depending on the intended use. It can be selected as appropriate. Each of the above-mentioned base materials may be used alone, but for example, it is a laminated body made of an arbitrary combination such as a composite of a resin base material and a wood-based base material, a composite of a resin base material and a metal base material, and the like. May be good. When the base material 11 is a laminated body, a primer layer may be further provided between the respective layers of the laminated body.

Examples of the resin base material used as the base material 11 include those made of various synthetic resins. Examples of the synthetic resin include polyolefin resins such as polyethylene, polypropylene, polymethylpentene, ionomer, and various polyolefin-based thermoplastic elastomers, vinyl chloride-based resins such as polyvinyl chloride, polyvinylidene chloride, vinyl chloride-vinyl acetate copolymer, and polyethylene terephthalate. , Polybutylene terephthalate, polyethylene naphthalate, ethylene glycol-terephthalic acid-isophthalic acid copolymer, polyester resin such as polyester-based thermoplastic elastomer, methyl poly (meth) acrylate, ethyl poly (meth) acrylate, poly (meth) ) Butyl acrylate, acrylic resin such as methyl (meth) acrylate-(meth) butyl acrylate copolymer, polyamide resin typified by nylon 6 or nylon 66, cellulose triacetate, cellophane, celluloid and the like. Resin, polystyrene, styrene resin such as acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer (ABS), polyvinyl alcohol, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, polycarbonate resin, polyallylate Examples thereof include resins and polyimide resins.
In the specification of the present application, "(meth) acrylic acid", "(meth) acrylate", and "(meth) acryloyl group" are "acrylic acid or methacrylic acid", "acrylate or methacrylate", and, respectively. It means "acryloyl group or methacryloyl group".

Examples of the metal base material used as the base material 11 include an alloy containing aluminum such as aluminum or duralumin, an alloy containing iron such as iron or carbon steel and stainless steel, and an alloy containing copper such as copper or brass and bronze. Examples include those made of titanium and the like. Further, as the base material 11, those obtained by plating these metals or the like can also be used.

Examples of the ceramic base material used as the base material 11 include non-ceramic ceramic materials such as cement, ALC (lightweight cellular concrete), gypsum, calcium silicate, and wood piece cement, and ceramics such as ceramics, earthenware, glass, and amber. Examples include those made of ceramic-based materials.

As the fibrous base material used as the base material 11, for example, a paper base material such as thin leaf paper, kraft paper, titanium paper, linter paper, paperboard, and base paper for gypsum board can be used. These paper substrates are used to increase the interfiber strength between the fibers of the paper substrate or between other layers and the paper substrate, to prevent fluffing, and to further prevent acrylic resin, styrene-butadiene rubber, and melamine resin. It may be one to which a resin such as urethane resin is added (impregnated with resin after making or internally filled at the time of making). Examples of the paper base material to which the resin is added include inter-paper reinforced paper and resin-impregnated paper.
Further, examples of the fibrous base material used as the base material 11 include vinyl wallpaper raw fabric in which a vinyl chloride resin layer is provided on the surface of a paper base material often used in the field of building materials.
Further, as the fibrous base material used as the base material 11, coated paper, art paper, sulfate paper, glassine paper, parchment paper, paraffin paper, Japanese paper and the like used in the office field or ordinary printing and packaging are used. Can be mentioned.
Further, examples of the fibrous base material used as the base material 11 include woven fabrics and non-woven fabrics of various fibers having a paper-like appearance and properties, although they are distinguished from the above-mentioned paper base materials. Examples of various fibers include protein-based or cellulose-based natural fibers such as silk, cotton and hemp, glass fibers, asbestos fibers, potassium titanate fibers, alumina fibers, silica fibers and inorganic fibers such as carbon fibers. Examples of various fibers include synthetic resin fibers such as polyester fibers, acrylic fibers and vinylon fibers.

Examples of the wood-based base material used as the base material 11 include veneer, plywood, laminated wood, particle board, and medium density fiber of various woods such as cedar, cypress, pine, zelkova, 楢, oak, lauan, and teak. A board (MDF) and the like can be mentioned.

The thickness of the base material 11 is not particularly limited, but is preferably 20 μm or more and 100 mm or less, more preferably 50 μm or more and 50 mm or less, and 100 μm or more, from the viewpoint of mechanical strength, handleability and economy. It is more preferably 30 mm or less.

The base material 11 is subjected to an oxidation method or an unevenness method on one or both sides thereof in order to improve the adhesion with other layers constituting the decorative material or to strengthen the adhesiveness with the adherend. Physical surface treatment such as, or surface treatment such as chemical surface treatment can be applied.
Examples of the oxidation method include corona discharge treatment, chromium oxidation treatment, flame treatment, hot air treatment, ozone-ultraviolet treatment method and the like, and examples of the unevenness method include sandblasting method and solvent treatment method. These surface treatments are appropriately selected depending on the type of the base material 1, but in general, the corona discharge treatment method is preferably used from the viewpoint of the effect and operability of the surface treatment.
Further, a primer layer may be further provided on the surface of the base material 11 in order to improve the interlayer adhesion between the base material 11 and other layers, strengthen the adhesiveness with the adherend, and the like. ..

<Concavo-convex layer>
The unevenness-imparting layer 12 is a layer provided to enhance the design and decorativeness of the decorative board of the present embodiment. More specifically, the unevenness-imparting layer 12 imparts a tactile sensation different from the conventional one. As the uneven pattern formed by the unevenness-imparting layer 12, at least a part of the region has a plurality of convex portions 13 having a thickness that can be tactilely recognized, whereby the uneven shape can be tactilely recognized. For example, the so-called floating wood board with the autumn wood part of the annual ring raised, the wood board with the conduit groove group, the wood grain pattern on the surface of the siding board with the joint groove, and the uneven structure of the stone board surface such as the open surface of the granite board. Stone pattern including stone pattern, cloth pattern including fiber or thread woven structure, leather pattern (also referred to as leather grain pattern), tiled pattern including joint groove, brick pile pattern including joint groove, sand grain pattern, satin finish Patterns, so-called perennial uneven patterns (also called ray engraving patterns) in which concave and convex parts are arranged in parallel with each other in the extending direction, geometric patterns, letters, figures, regular patterns, There are abstract patterns, etc., and there are also patterns such as parquet, patchwork, etc. that combine these.

(Shape of convex part)
The convex portion 13 of the unevenness-imparting layer 12 is configured so that the volume differs between the base material side and the opposite side (the side opposite to the base material 11 in the z direction, may be referred to as “top side”). ing. Specifically, the convex portion 13 has a structure in which the volume on the base material side is larger than the volume on the top side.
Here, "the volume on the base material side is larger than the volume on the top side" is considered as follows. Consider a virtual surface L at a position of 50% (0.5 T) with respect to the thickness of the convex portion represented by T in FIG. 2. Since FIG. 2 is a cross-sectional view of the convex portion 13, a line as a cross section of the virtual surface L (this may be referred to as a virtual line L) is shown in FIG. When the volume of the base material side portion 13a sandwiching the virtual surface (or virtual line) _L is V _K and the volume of the top side portion 13b sandwiching the virtual surface _L is VS, V _K is VS. Should be larger than. That is, V _K > _VS may be satisfied.
The mode of the volume change from the base material side portion 13a to the top side portion 13b in the convex portion 13 is not particularly limited. For example, as shown in the shapes shown in FIGS. 1 and 2, the convex portion 13 may be changed in a stepped shape in the thickness direction, or the volume may be gradually changed toward the top side by combining curved surfaces. You may. As an intermediate form thereof, as shown in FIG. 4 described later, a form in which semi-elliptical spheres having different diameters are laminated may be used.

On the other hand, the plan view shape of the convex portion 13 (the shape formed in the xy plane direction when the decorative material 10 is viewed from the convex portion 13 side in the + z direction) is not particularly limited to the rectangle as shown in FIG. Instead, the shape may be as needed. That is, any shape such as a quadrangle other than a rectangle such as a triangle or a square, a polygon such as a hexagon, a circle, an ellipse, another curve, an irregular shape, or a linear shape extending in a predetermined direction. You may.
Here, the indeterminate form means a shape having any of the following characteristics.
(1) When viewed in a plan view, the shapes of the plurality of convex portions 13 are not all congruent, and two or more types of convex portions having different shapes and sizes coexist. All of the convex portions 13 may have different shapes and sizes from each other, and two or more congruent or similar convex portions 13 may be included.
(2) When viewed in a plan view, the shape of the plurality of convex portions 13 is different from a relatively monotonous shape such as a regular polygon, a circle, an ellipse, or a cardioid (heart shape). For example, a complex shape in which the contour of a convex region needs to be approximated by a combination of complex functions such as polynomials and infinite series.
(3) A form having the characteristics of both (1) and (2).

The width W ₁ of the convex portion 13 is not particularly limited, but can be 50 μm or more and 650 μm or less.
Here, the width W ₁ is the size (dimension) of the convex portion 13 in the xy plane direction, and when the convex portion 13 has a circular shape in a plan view, the width W ₁ is obtained in all directions in the xy plane. Matches the diameter of the circle. However, in general, the width W ₁ of the convex portion 13 differs depending on each direction in the xy plane. For example, when the plan view shape of the convex portion 13 is elliptical, the width W ₁ is continuously distributed in the values between the minor axis length and the major axis length. Further, when the shape of the convex portion 13 in a plan view is rectangular, the width W ₁ is continuously distributed in the values between the short side length and the diagonal length.

Further, when the convex portion 13 has a clear shape change in the cross section (step, two steps in FIGS. 1, 2, and 4) as in the form of FIGS. 1, 2 or 4, which will be described later. The preferable range of the thickness sandwiching the shape change (step) portion is that the thickness T ₁ of the step on the substrate side shown in FIG. 2 is 10 μm or more and 50 μm or less, and the thickness T ₂ of the step on the top side is 20 μm. It is 100 μm or less, and the width W ₂ of the step on the top side is 10% or more and 80% or less with respect to the width W ₁ of the step on the base material side.
In the case of two steps, the position in the thickness direction of the step and the position of the virtual surface L may or may not match. Further, although T ₁ <T ₂ in the example of FIG. 2, it may be T ₁ > T ₂ as shown in another example in FIG.

In the plurality of convex portions 13, the distance between the adjacent convex portions 13 can be appropriately determined depending on the object to be expressed, and for example, a range of 50 μm or more and 50 mm or less can be considered.

(Particles contained in the convex part)
As can be seen from FIG. 2, the convex portion 13 contains particles, and includes at least two types of particles having different average particle diameters. As a result, a tactile sensation different from the conventional one can be obtained. In addition to the tactile sensation, a visual expression different from the conventional one may be obtained.
In this embodiment, the convex portion 13 includes the first particle 14 and the second particle 15 having an average particle diameter larger than that of the first particle 14.
For the average particle size of the particles, a laser diffraction type particle size distribution measuring device "SALD-2100-WJA1" manufactured by Shimadzu Corporation is used, and the powder to be measured is injected from the nozzle using compressed air. , It is the average of the measured values by the injection type dry measuring method which is dispersed in the air and measured.

Here, the specific size of the average particle diameter is not particularly limited, but it is preferably smaller than the thickness T of the convex portion containing the particles. As a result, the particles are embedded in the convex portion and the particles form the skeleton of the convex portion, so that it becomes easy to control the thickness of the convex portion. More specifically, the average particle diameter of the first particle 14 can be 5 μm or more and 20 μm or less, and the average particle diameter of the second particle 15 can be 20 μm or more and 100 μm or less.
The difference in the average particle diameter between the first particle 14 and the second particle 15 is not particularly limited, but is preferably 10 μm or more.

Here, as shown by an arrow A in FIG. 2, when the decorative material 10 (concavo-convex-imparting layer 12) is viewed in a plan view from the thickness direction (+ side of the z-axis), the average particle diameter is larger than that of the first particle 14. The second particle 15 having a large size includes most of the convex portion 13 within the range of the portion 13b (immediately below) on the top side (that is, 70% or more in the area in a plan view) ₍ that is, the width W2). Most of it is included in the range.) It is preferable. More preferably, as shown by the arrow A in FIG. 2, when the decorative material 10 (concavo-convex-imparting layer 12) is viewed in a plan view from the thickness direction (+ side of the z-axis), the average particle diameter is the first particle 14. The larger second particle 15 is contained only within the range of the apical portion 13b (immediately below) of the convex portion 13 (that is, contained _only within the range of the width W2).
As a result, the tactile sensation different from the conventional one becomes more remarkable.

In the embodiment shown in FIGS. 2 and 4, the total volume of the plurality of second particles 15 contained in the top side portion 13b is the total volume of the plurality of second particles 15 contained in the base material side portion 13a. The particle distribution is larger than that.
However, the particle distribution in the convex portion 13 is not limited to such a form, and other forms can be adopted.
For example, as shown in FIG. 3, the particle diameter D ₁₅ of the second particle 15 is larger than the thickness T ₁ of the step on the substrate side, that is, that is,
D ₁₅ > T ₁
By a gravure printing method using a gravure plate having cell recesses corresponding to the shape of the convex portions 13 on the surface, the ink composition for forming the convex portions 13 composed of the second particles 15 and the resin of the binder was used. Visually, only the portion 13b on the top side of the convex portion 13 contains the second particle 15 having a (relatively) large particle diameter, and the portion 13a on the substrate side of the convex portion 13 does not contain the second particle 15. The convex portion 13 of the above can be obtained.
Depending on the thickness and width of the top-side portion 13b of the convex portion 13 and the particle size and content of the first particle 14, the first particle 14 having a relatively small particle diameter is the top-side portion 13b of the convex portion. It can be in either a contained or non-containing form.

The particles are acrylic resin, urethane resin, polyamide resin such as silicone resin and nylon, resin such as polycarbonate resin, or inorganic materials such as silica, alumina, zirconia, titania (titanium dioxide), kaolinite, calcium carbonate, barium sulfate and the like. A bead consisting of can be mentioned. As the particles, the above-mentioned one kind may be used alone, or two or more kinds may be used in combination. The materials of the first particle 14 and the second particle 15 can be the same or different. In addition to the desired tactile sensation, the first particles take into consideration the appearance of disappearance and the proper distribution of the first particles 14 and the second particles 15 to the top side portion 13b of the convex portion and the base material side portion 13a. It is determined in consideration of the material, particle diameter, content, suitable distribution of the portion 13a of the convex portion on the substrate side, and the like.

On the other hand, the material constituting the convex portion 13 (so-called binder portion) in the portion other than the particles is preferably at least one selected from a two-component curable resin, a thermoplastic resin, a thermosetting resin and an ionizing radiation curable resin.

Examples of the two-component curable resin include a two-component curable urethane resin containing a polyol compound as a main component and an isocyanate compound as a curing agent, a two-component curable epoxy resin, a two-component curable urethane-modified acrylic resin, and a two-component curable polyester resin. Can be mentioned.

Examples of the thermoplastic resin include acrylic resin, cellulose resin, urethane resin, vinyl chloride resin, polyester resin, polyolefin resin, polycarbonate, nylon, polystyrene and ABS resin.

Examples of the thermosetting resin include acrylic resins, urethane resins, phenol resins, urea resins, melamine resins, epoxy resins, unsaturated polyester resins, silicone resins and the like. A curing agent is added to the thermosetting resin as needed.

The ionizing radiation curable resin is a composition containing a compound having an ionizing radiation curable functional group. Examples of the ionizing radiation curable functional group include an ethylenically unsaturated bond group such as a (meth) acryloyl group, a vinyl group and an allyl group, an epoxy group and an oxetanyl group.
As the ionizing radiation curable resin, a compound having an ethylenically unsaturated bond group is preferable. Further, from the viewpoint of suppressing damage to the resin layer in the process of manufacturing the decorative sheet, the ionized radiation curable resin is more preferably a compound having two or more ethylenically unsaturated bond groups, and above all, ethylenically unsaturated. Polyfunctional (meth) acrylate compounds having two or more binding groups are more preferred. As the polyfunctional (meth) acrylate compound, either a monomer or an oligomer can be used.
The ionizing radiation means an electromagnetic wave or a charged particle beam having an energy quantum capable of polymerizing or cross-linking a molecule, and usually, an ultraviolet ray (UV) or an electron beam (EB) is used. Electromagnetic waves such as X-rays and γ-rays, and charged particle beams such as α-rays and ion rays can also be used.

Among the polyfunctional (meth) acrylate compounds, the bifunctional (meth) acrylate monomers include ethylene glycol di (meth) acrylate, bisphenol A tetraethoxydiacrylate, bisphenol A tetrapropoxydiacrylate, and 1,6-hexane. Examples thereof include diol diacrylate.
Examples of the trifunctional or higher functional (meth) acrylate-based monomer include trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, and di. Examples thereof include pentaerythritol tetra (meth) acrylate and isocyanuric acid-modified tri (meth) acrylate.
Further, the (meth) acrylate-based monomer may be one in which a part of the molecular skeleton is modified, and is modified with ethylene oxide, propylene oxide, caprolactone, isocyanuric acid, alkyl, cyclic alkyl, aromatic, bisphenol and the like. Can also be used.

Examples of the polyfunctional (meth) acrylate-based oligomer include acrylate-based polymers such as urethane (meth) acrylate, epoxy (meth) acrylate, polyester (meth) acrylate, and polyether (meth) acrylate.
Urethane (meth) acrylates are obtained, for example, by reacting polyhydric alcohols and organic diisocyanates with hydroxy (meth) acrylates.
Further, the preferable epoxy (meth) acrylate is a (meth) acrylate obtained by reacting a (meth) acrylic acid with a trifunctional or higher functional aromatic epoxy resin, an alicyclic epoxy resin, an aliphatic epoxy resin and the like, and a bifunctional one. (Meta) acrylate obtained by reacting the above aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, etc. with polybasic acid and (meth) acrylic acid, and bifunctional or higher functional aromatic epoxy resin, It is a (meth) acrylate obtained by reacting an alicyclic epoxy resin, an aliphatic epoxy resin or the like with phenols and (meth) acrylic acid.
The ionizing radiation curable resin may be used alone or in combination of two or more.

When the ionizing radiation curable resin is an ultraviolet curable resin, the composition preferably contains additives such as a photopolymerization initiator and a photopolymerization accelerator.
Examples of the photopolymerization initiator include acetophenone, benzophenone, α-hydroxyalkylphenone, Michlerketone, benzoin, benzyldimethylketal, benzoylbenzoate, α-acyloxime ester, and thioxanthones in the case of a compound having an ethylenically unsaturated group. One or more selected from the above can be mentioned.
The photopolymerization accelerator can reduce the polymerization inhibition by air at the time of curing and accelerate the curing rate. Examples of the photopolymerization accelerator include one or more selected from p-dimethylaminobenzoic acid isoamyl ester, p-dimethylaminobenzoic acid ethyl ester and the like.

These may be transparent, but may be colored as needed. In the case of coloring, a coloring agent (pigment or dye) can be added to the composition for coloring. As the colorant, known or commercially available pigments or dyes can be appropriately used. As the colorant, one kind may be used alone, or two or more kinds may be used in combination. In addition, the amount of the colorant added can be appropriately set according to the desired color and the like.

In addition, these compositions include fillers, matting agents, foaming agents, flame retardants, lubricants, antistatic agents, antioxidants, UV absorbers, light stabilizers, radical scavengers, and soft components as needed. For example, various additives such as rubber) may be contained.

The blending amount (also referred to as content or addition amount) of the particles (first particle, second particle) to these compositions is 5 mass by mass with respect to 100 parts by mass of the composition from the viewpoint that a tactile sensation can be imparted. It is preferably 60 parts by mass or more, more preferably 5 parts by mass or more and 50 parts by mass or less, and further preferably 10 parts by mass or more and 40 parts by mass or less.

The plurality of convex portions 13 configured as described above are arranged corresponding to the required pattern. When the pattern of the decorative material is a wood grain pattern having an annual ring part, as a form for satisfactorily reproducing the design appearance and tactile sensation of the wood grain pattern, for example, the autumn material (late material) part in the annual ring part and the spring material (early material) in the annual ring part. The material) portion and the portion can be composed of convex portions having different shapes.
Further, as another form for satisfactorily reproducing the design appearance and tactile sensation of the wood grain pattern, in the wood grain pattern in which the pattern of the decorative material has knot holes, the knot holes and the portions other than the knot holes may be formed by convex portions having different shapes. ..
With such a configuration, the wood grain decorative material can obtain a visual effect and a tactile effect close to those of real wood.

<Other configurations>
(Picture layer)
The decorative material of the present disclosure may further include a pattern layer (not shown) between the base material 11 and the unevenness-imparting layer 12. The design layer can impart designability to the decorative material. The patterns formed by the pattern layer include wood grain patterns, stone grain patterns (open surface of granite, etc.), cloth grain patterns, leather grain patterns, tiled patterns (including joint grooves), and brickwork patterns (including joint grooves). There are grain patterns, satin patterns, ray carved patterns, geometric patterns, letters, figures, regular patterns, abstract patterns, etc., and there are also patterns such as parquet and patchwork that combine these patterns. These patterns are formed by multicolor printing with normal process colors such as yellow, red, blue and black, and also by multicolor printing with special colors prepared by preparing plates of the individual colors that make up the pattern. Will be done.

The pattern layer is appropriately arranged with colorants such as pigments and dyes so that the desired design can be obtained. The pattern layer is formed by a printing method such as offset printing, flexographic printing, gravure printing, screen printing, spray printing and inkjet printing, and a transfer method for transferring a printed pattern. The pattern layer may be a single layer, but may be formed from two or more layers.

As the ink used for forming the pattern layer, an ink obtained by appropriately mixing a binder resin with a colorant such as a pigment or a dye, an extender pigment, a solvent, a stabilizer, a plasticizer, a catalyst, a curing agent or the like is used.
The binder resin is not particularly limited, and is, for example, acrylic resin, styrene resin, polyester resin, urethane resin, chlorinated polyolefin resin, vinyl chloride-vinyl acetate copolymer resin, polyvinyl butyral resin, alkyd resin. Examples thereof include resins, petroleum resins, ketone resins, epoxy resins, melamine resins, fluororesins, silicone resins, fibrous derivatives, rubber resins and the like. These resins can be used alone or in admixture of two or more.
The colorant is not particularly limited, and for example, carbon black (black), iron black, titanium white, antimony white, yellow lead, titanium yellow, petal pattern, cadmium red, ultramarine, cobalt blue and other inorganic pigments, quinacridone red. , Isoindolinon yellow, nickel azo complex, phthalocyanine blue, azomethine azo black and other organic pigments or dyes, aluminum, brass and other scaly foil pieces, metal pigments, titanium dioxide coated mica, basic lead carbonate and other scaly foils. A pearl luster (pearl) pigment consisting of pieces is used.
Additives such as an antioxidant, an ultraviolet absorber, and a light stabilizer may be contained in the pattern layer.

The thickness of the pattern layer is preferably 0.1 μm or more and 40 μm or less, more preferably 0.3 μm or more and 20 μm or less, and further preferably 0.5 μm or more and 10 μm or less, from the viewpoint of satisfactorily exhibiting the design of the pattern.

(Matte layer)
The decorative material of the present disclosure may further include a matte layer (not shown) on the unevenness-imparting layer 12. When the matte layer is provided over the entire surface, it has the effect of uniformly lowering the front surface (low gloss or matting), and when it is partially provided, the gloss difference from the surrounding area. Can be generated to create a visual unevenness.
The matte layer may be provided on the entire surface of the unevenness-imparting layer 12, but in consideration of generating a gloss difference from the surrounding area and expressing a visual unevenness, the matte layer is directly above the convex portion. And, it is preferable to provide it in the vicinity, and it is more preferable to provide it in a limited manner immediately above the convex portion.

The matte layer preferably contains a matting agent from the viewpoint of improving the matting effect.
Examples of the matting agent include inorganic fine particles and organic fine particles. Examples of the inorganic fine particles include particles made of silica, alumina, aluminosilicate, kaolinite, calcium carbonate, barium sulfate, glass and the like.
Examples of the organic fine particles include particles made of acrylic resin, polycarbonate resin, urethane resin, urea resin, benzoguanamine resin, benzoguanamine-melamine-formaldehyde condensate and the like. The particle size of these cancelling agents is about 1 μm to 20 μm.
As the matting agent, silica particles are suitable from the viewpoint that the matting effect is high and the gloss can be easily controlled. Further, as the matting agent, the above-mentioned one type may be used alone, or two or more types may be used in combination.
From the viewpoint of the matting effect and the control of gloss, the particle size of the matting agent is preferably 1 μm or more and 10 μm or less, more preferably 2 μm or more and 9 μm or less, and further preferably 3 μm or more and 7 μm or less. ..

(Backing base material)
It is preferable that the decorative material further includes a backing base material (not shown) on the side opposite to the surface of the base material 11 on which the unevenness-imparting layer 12 is provided. The lining base material is provided as necessary to reinforce the decorative material, impart adhesiveness to the adherend, and impart concealment.

As the lining base material, a resin sheet, paper, a non-woven fabric, a woven fabric, a metal foil, or the like can be used. Among these, as the resin sheet, a sheet made of acrylic resin, polyester resin, polyolefin resin, polyvinyl chloride resin, ABS resin or the like can be used.

The thickness of the lining base material is preferably 0.05 mm or more and 0.15 mm or less, more preferably 0.06 mm or more and 0.13 mm or less, and 0.08 mm or more and 0, from the viewpoint of improving reinforcing properties, adhesiveness and concealing properties. .12 mm or less is more preferable.

(Adhesive layer)
The decorative material preferably has an adhesive layer (not shown) provided between at least one of the base material 11, the unevenness-imparting layer 12, the pattern layer, the matte layer, and the backing base material. The adhesive layer has a function of assisting the joining of each layer of the base material 11, the unevenness-imparting layer 12, the pattern layer, the matte layer, and the backing base material, and can strengthen the joining of each layer.
The adhesive layer is preferably at least one selected from a two-component curable resin, a thermoplastic resin, a thermosetting resin, and an ionizing radiation curable resin.

(Primer layer)
It is preferable that the decorative material is provided with a primer layer (not shown) between at least one of the base material 11, the unevenness-imparting layer 12, the pattern layer, the matte layer, and the backing base material. The primer layer has a function of assisting the joining of each layer of the base material 11, the unevenness-imparting layer 12, the pattern layer, the matte layer, and the backing base material, and can strengthen the joining of each layer.
As the primer layer, a resin that improves the adhesion between the two layers facing each other with the primer layer interposed therebetween may be appropriately selected, and there is no particular limitation.

According to the cosmetic material according to the embodiment of the present disclosure, it is possible to provide a cosmetic material having a complicated and highly designable property due to a visual effect typified by erasing in some cases, at least for the tactile sensation.

FIG. 4 shows a diagram illustrating another form of the decorative material 10'. The upper part of FIG. 4 is a plan view of the decorative material 10'(the xy plane is viewed from the side of the unevenness-imparting layer 12' in the + z direction), and the lower part of FIG. 4 is a cross-sectional view taken along the line AA'. .. However, the cross-sectional view does not have hatching on the cut surface for easy viewing.
The decorative material 10'also has an unevenness-imparting layer 12'in which a plurality of convex portions 13'are arranged on one surface of the base material 11, and the morphology of each convex portion 13'and the first particles 14 and the second. The particles 15 can be considered in the same manner as the above-mentioned morphology of the convex portion 13 and the first particles 14 and the second particles 15.
Further, it is the same as the decorative material 10 that the second particles 15 having a relatively large average particle diameter are present only in the portion on the top side of the convex portion 13'when viewed in a plan view.
However, the convex portion 13'of the decorative material 10'has an outer shape different from that of the convex portion 13, and a semi-elliptical sphere having a small diameter is placed on a semi-elliptical sphere having a large diameter arranged on the base material 11 side. It is a form like that. Even in such a form, the effect is achieved.

Next, the present disclosure will be described in more detail by way of examples. However, the present invention is not limited to this example.

[Example]
As an example, a decorative material was produced according to the example of the decorative material 10 of FIGS. 1 and 2. At this time, T ₁ in _FIG . ₂ is ₂₀ μm, T ₂ is 40 μm, and the _total thickness T is 60 μm. The spacing was designed to be distributed in the range of 50 μm or more and 50 mm or less. Further, the area ratio occupied by the convex portion in the plan view was set to 30% with respect to the xy plane area of the base material, and the convex portion was arranged so as to be a pattern simulating a wood grain pattern.
As the particles, the average particle size of the first particle was 12 μm, and the average particle size of the second particle was 50 μm.
Here, the base material is a paper having a basis weight of 45 g / m ² thickness (a wood grain pattern is gravure-printed on the surface), and the convex portion is a composition in which particles of the acrylic resin having the above average particle diameter are contained in the acrylic polyol resin. I used a thing. The composition includes 14 parts by mass of particles having an average particle diameter of 12 μm as the first particles 14 and 19 parts by mass of particles having an average particle diameter of 50 μm as the second particles 15 with respect to 100 parts by mass of the acrylic polyol resin constituting the binder portion.
When viewed in a plan view from the thickness direction, the second particles contained in the convex portion 13 are arranged only within the range of the portion 13b on the top side of the convex portion, and most of the first particles are the substrate side portion of the convex portion. It was dispersed in 13a, and a small number was also dispersed in the top portion 13b.

[Comparative Example 1]
In Comparative Example 1, the shape of the convex portion was the same between the portion on the base material side and the portion on the top side without changing. Specifically, in the cross section of the same viewpoint as in FIG. 2, the convex portion is a rectangle having a thickness of 60 μm and a width of 280 μm. Further, the particles contained in the convex portion were one type having an average particle diameter of 12 μm.
Others are the same as in Example 1.

[Comparative Example 2]
In Comparative Example 2, the shape of the convex portion was the same as that of Example 1, and the contained particles were one type having an average particle diameter of 12 μm.
Others are the same as in Example 1.

[Comparative Example 3]
In Comparative Example 3, the shape of the convex portion was the same as that of Comparative Example 1, and the contained particles were one type having an average particle diameter of 50 μm.
Others are the same as in Example 1.

Twenty adults were subjected to finger touch checks on the surfaces of the decorative materials prepared in Examples and Comparative Examples, and evaluated according to the following criteria.
A: 16 or more people answered that it feels like a real wood grain surface B: 11 or more and 15 or less people answered that it feels like a real wood grain surface C: Real wood surface Less than 10 people answered that it feels like

As a result of the evaluation, Example was A, Comparative Example 1 and Comparative Example 2 were C, and Comparative Example 3 was B.

10 Decorative material 11 Base material 12 Concavo-convex layer 13 Convex part 14 First particle 15 Second particle

Claims (2)

A base material and an unevenness-imparting layer in which a plurality of convex portions containing particles are arranged on one surface side of the base material are provided.
The convex portion has a shape in which the volume of the portion on the base material side is larger than the volume of the portion on the top side.
The particles are provided with at least two types having different average particle diameters, and when the unevenness-imparting layer is viewed in a plan view, the particles having a larger average particle diameter are on the top side of the convex portion. Included only in range,
Cosmetic material. The decorative material according to claim 1, wherein the convex portion has a shape in which the base material side and the top side have two stages.

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