JP7198440B2 - Decorative sheets and materials - Google Patents

Description

TECHNICAL FIELD The present invention relates to a decorative sheet and a decorative material.

Decorative sheets are attached to various members for the purpose of decoration. Interior and exterior materials such as furniture and fixtures; Surfaces of walls of buildings; Surfaces of indoor spaces such as floors and ceilings; , Outdoor surfaces such as roofs, doorcases, eaves; Surfaces of outdoor structures such as fences and fences; Indoor surfaces or exterior parts of fittings such as window frames, door frames, doors and partitions; Surfaces; internal or external surfaces of vehicles such as automobiles, railroad vehicles, ships, and aircraft;

The basic layer structure of the decorative sheet is a layer structure having a design layer and a surface protective layer on a substrate. This decorative sheet lacks tactile sensation. This decorative sheet cannot provide the feel of natural wood such as a sliced veneer. Patent Documents 1 to 3 propose decorative sheets that can impart a tactile sensation.

JP 2019-217740 A Japanese Patent Application Laid-Open No. 2004-262105 JP 2005-212237 A

The decorative sheet described in Patent Document 1 has an uneven surface formed by embossing. The decorative sheet of Patent Literature 1 can impart a tactile sensation due to the uneven shape of the surface.

The decorative sheet described in Patent Document 2 has a substrate, a specific first surface protective layer, and a second surface protective layer containing synthetic resin beads having an average particle size of 10 to 30 μm. The average film thickness of the portion of the second surface protective layer excluding the synthetic resin beads protruding from the surface is 3 to 6 μm. The decorative sheet described in Patent Literature 2 can impart a predetermined tactile feel, but cannot reduce luster. When the gloss of the decorative sheet is high, it becomes difficult to express the appearance of natural materials such as natural wood.

The conventional decorative sheets described in Patent Literatures 1 to 3 are incapable of simultaneously imparting an excellent tactile feel and reducing luster. An object of the present disclosure is to provide a decorative sheet with excellent tactile sensation and to reduce the gloss of the decorative sheet.

In one embodiment of the present disclosure, the decorative sheet is
a design layer that displays a design;
comprising the design layer and a laminated ridge layer,
The raised layer includes a raised portion provided in a region overlapping with a partial region of the design layer,
The raised portion contains a binder resin, resin particles and inorganic particles,
The average particle size of the resin particles is larger than the average particle size of the inorganic particles,
The raised portion includes a convex portion formed by projecting the inorganic particles.

In one embodiment of the present disclosure, the decorative sheet is
A decorative sheet having a raised portion on at least a part of a base material,
The raised portion contains a binder resin, resin particles and inorganic particles,
The thickness of the raised portion is partially different.

According to the present disclosure, it is possible to impart an excellent tactile feel to the decorative sheet and reduce the gloss of the decorative sheet.

1 is a diagram for explaining an embodiment of the present disclosure, and is a plan view showing an example of a decorative material and a decorative sheet; FIG. FIG. 2 is an enlarged plan view showing the decorative sheet shown in FIG. 1; FIG. 2 is a longitudinal sectional view of the decorative sheet shown in FIG. 1; FIG. 4 is a vertical cross-sectional view showing the decorative sheet shown in FIG. 1, enlarged from FIG. 3;

An embodiment of the present disclosure will be described below with reference to the drawings. In the drawings attached to this specification, for convenience of illustration and ease of understanding, the scale, length-to-width ratio, etc. are appropriately changed and exaggerated from those of the real thing.

In order to clarify the directional relationship between the drawings, some drawings show the common first direction D1, the second direction D2 and the third direction D3 by the arrows with the common reference numerals. The tip side of the arrow is the first side in each direction. An arrow pointing forward from the plane of the drawing along a direction perpendicular to the plane of the drawing is indicated by a dot in a circle, as shown in FIG. In the illustrated example, the third direction D3 is the normal direction of the decorative sheet 20 . The illustrated flat decorative sheet 20 extends in a first direction D and a second direction D2. The first direction D and the second direction D2 are orthogonal to the third direction D3. The first direction D and the second direction D2 are orthogonal to each other.

[Decorative sheet and decorative material]
The decorative sheet 20 includes a design layer 40 and a raised layer 50 . The design layer 40 displays a design. The design layer 40 shown in FIG. 1 has a wooden surface pattern. The raised layer 50 includes a raised portion 55 provided in a region overlapping with a partial region of the design layer 40 . The raised portion 55 includes a binder resin 60 , resin particles 61 and inorganic particles 62 . The average particle size of the resin particles 61 is larger than the average particle size of the inorganic particles 62 .

In one embodiment, the decorative sheet 20 is devised to achieve both excellent tactile feel and low gloss. As a specific configuration, the decorative sheet may have the configurations shown in FIGS. 2 to 4. FIG. The raised portion 55 may include a convex portion 56 formed by protruding inorganic particles 62 . In the example shown in FIG. 4, recesses 57 are formed between inorganic particles 62A and inorganic particles 62B. The top of the inorganic particles 62A protrudes toward the first side in the third direction D3 from the position of the minimum thickness TA in the recess 57. As shown in FIG.

According to the present embodiment, the thickness of a portion of the raised portion 55 can be set to a thickness corresponding to the average particle diameter of the resin particles 61, and the thickness of the other portion of the raised portion 55 can be adjusted to the particle diameter of the inorganic particles 62. The thickness can be adjusted according to the As a result, as shown in FIG. 3, the decorative sheet 20 has a region RX where the raised portion 55 is not provided, a region RZ where the resin particles 61 of the raised portion 55 protrude, and the inorganic particles 62 of the raised portion 55. and an area RY in which is set. The decorative sheet 20 has different heights in these three regions RX, RY and RZ. When the decorative sheet 20 is touched, a strong tactile sensation is imparted from the resin particles 61 in the region RZ. In addition, in the region RY whose thickness is defined by the inorganic particles 62, a strong tactile sensation due to the presence of the inorganic particles 62 is imparted. In addition, as shown in FIGS. 2 and 4, the tops of the projections 56 are dispersed in the region RY. A complex tactile sensation can be expressed by the dispersed tops of the projections 56 . With these, it is possible to impart a strong tactile sensation with rich expression.

Furthermore, the surfaces of the inorganic particles 62 are less glossy. In the region RY whose thickness is defined by the inorganic particles 62 , the inorganic particles 62 protrude from the binder resin 60 and are exposed from the binder resin 60 . Alternatively, the inorganic particles 62 are located near the surface of the raised portion 55 . Therefore, the luster of the raised portion 55 can be sufficiently reduced.

As described above, it is possible to provide the decorative sheet 20 with excellent tactile sensation and to reduce the luster of the decorative sheet 20 . That is, various tactile sensations can be emphasized and gloss can be reduced. Therefore, according to the decorative sheet 20, the artificial impression can be weakened and a natural texture can be created.

As shown in FIG. 3, the decorative material 100 may include a support material 15 and a decorative sheet 20. As shown in FIG. The support material 15 is an adherend of the decorative sheet 20 . The support material 15 is given a design using the decorative sheet 20 . As the support material 15, board materials such as wood veneer, wood plywood, particle board, MDF (medium density fiber board), wood fiber board such as laminated wood, etc., and three-dimensional articles made of various types of wood such as cedar, cypress, pine, lauan, etc. Wooden members used as such; Plates and steel plates such as iron and aluminum, three-dimensional articles, or metal members used as sheets; Glass, ceramics such as ceramics, non-cement ceramic materials such as gypsum, ALC (lightweight cellular concrete ) Plate materials such as non-ceramic ceramic materials such as plates and ceramic members used as three-dimensional articles; acrylic resins, polyester resins, polystyrene, polyolefin resins such as polypropylene, ABS (acrylonitrile-butadiene-styrene copolymer) resin Phenolic resins, vinyl chloride resins, cellulose resins, plate materials such as rubber, three-dimensional articles, resin members used as sheets, and the like are exemplified.

As described above, decorative sheet 20 includes design layer 40 . The design layer 40 shown in FIG. 1 has a wooden surface pattern. The decorative sheet 20 shown in FIG. 1 expresses the surface of wood. The tree represented by the decorative sheet 20 is not particularly limited. The tree represented by the decorative sheet 20 may be the bark of trees such as cedar, cypress, walnut, pine, and cherry. Also, as shown in FIGS. 3 and 4, the decorative sheet 20 may include a base material 30 . Each component of the decorative sheet 20 will be described in further detail below.

<Base material>
The substrate may be in the form of a flat plate such as a film, a sheet, or a plate. Films, sheets, and plates are often referred to as films, sheets, and plates in order of relatively thin thickness, but in this specification, , do not distinguish between these three unless otherwise specified.

Examples of base material materials include resins, metals, non-metallic inorganic materials, fibrous materials, and wood-based materials. The base material can be appropriately selected according to the application.

The substrate may be a single layer. The substrate may have a laminate of two or more layers made of the above materials. When the base material is a laminate of two or more layers, two or more layers of different materials may be laminated to complement each other's properties of the material of each layer. The following A to J are exemplified as examples of the substrate formed by laminating two or more layers.
(A) Lamination of resin and wood material (B) Lamination of resin and metal (C) Lamination of resin and fibrous material (D) Lamination of resin and non-metallic inorganic material (E) Resin 1 and resin Lamination with 2 (F) Lamination of metal and wood material (G) Lamination of metal and non-metallic inorganic material (H) Lamination of metal and fibrous material (I) Lamination of metal 1 and metal 2 ( J) Lamination of non-metallic inorganic material and fibrous material

In E above, the resin 1 and the resin 2 may be different resins. For example, resin 1 may be an olefin resin and resin 2 may be an acrylic resin. In H above, metal 1 and metal 2 may be different metals. For example, metal 1 may be copper and metal 2 may be chromium.

When the substrate is a laminate such as A to J above, it may have a layer (adhesive layer, etc.) for enhancing adhesive strength between the constituent layers of the laminate.

Various synthetic resins and natural resins are exemplified as resins used for the base material. Examples of synthetic resins include cured products of thermoplastic resins and curable resin compositions.

Thermoplastic resins include polyethylene, polypropylene, polymethylpentene, ionomer, olefin resins such as various olefin thermoplastic elastomers, vinyl chloride 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 resins such as polyester thermoplastic elastomers, polymethyl (meth)acrylate, polyethyl (meth)acrylate, poly (meth) ) Acrylic resins such as butyl acrylate, methyl (meth)acrylate-butyl (meth)acrylate copolymer, polyamide resins such as nylon 6 or nylon 66, cellulose triacetate, cellophane, celluloid, etc. Resins, styrene resins such as polystyrene, acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer (ABS), polyvinyl alcohol, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, polycarbonate resin, polyarylate Examples include resins and polyimide resins.
Examples of the curable resin composition include thermosetting resin compositions and ionizing radiation curable resin compositions exemplified in the later-described matte layer.
Examples of natural resins include natural rubber, rosin, and amber.

Examples of metals used for the base material include aluminum or alloys containing aluminum such as duralumin, alloys containing iron such as iron or carbon steel, stainless steel, copper or brass, alloys containing copper such as bronze, gold, silver, Chromium, nickel, cobalt, tin, titanium and the like are exemplified. The metal substrate may include a plating layer plated with these metals.

Examples of non-metallic inorganic materials used for the base material include non-ceramic ceramic materials such as cement, ALC (lightweight cellular concrete), gypsum, calcium silicate, wood chip cement, and ceramic ceramics such as ceramics, earthenware, glass, and enamel. Natural stone such as natural stone, limestone, marble, granite, andesite, and the like are exemplified.

Examples of fibrous materials used as substrates include thin paper, kraft paper, fine paper, Japanese paper, titanium paper, linter paper, parchment paper, paraffin paper, parchment paper, glassine paper, backing paper for wallpaper, paperboard, and gypsum board. paper such as base paper; woven or non-woven fabric made of fibers such as silk, cotton, hemp, polyester resin fiber, acrylic resin fiber, glass fiber, carbon fiber; The paper may further contain a resin such as an acrylic resin, a styrene-butadiene rubber, a melamine resin, or a urethane resin in order to increase the interfiber strength of the paper base material or prevent the paper base material from fluffing. . Examples of resin-added paper include inter-paper reinforced paper and resin-impregnated paper.
Examples of the base material obtained by laminating a resin layer on a fibrous material layer include a wallpaper raw fabric obtained by laminating a resin layer such as a vinyl chloride resin layer, an olefin resin layer, an acrylic resin layer, etc. on the surface of a backing paper for wallpaper. .
Examples of wood-based material base materials include wood base materials made of wood such as cedar, cypress, pine, zelkova, oak, oak, walnut, lauan, teak, and rubber trees. The wood substrate may be plate-shaped. The wood substrate may be veneer, veneer, plywood, laminated lumber, particle board, fiberboard, or the like.

The base material may contain additives as needed. When the material constituting the base material is a resin, additives include inorganic fillers such as calcium carbonate and clay, flame retardants such as magnesium hydroxide, antioxidants, lubricants, foaming agents, ultraviolet absorbers, light stabilizers, etc. are exemplified. The content of the additive is not particularly limited as long as it does not impair the processing characteristics, etc. The content of the additive is appropriately set according to the required characteristics, etc.

The shape and dimensions of the substrate are not particularly limited. The shape and dimensions of the substrate can be appropriately selected depending on the application, desired properties and processability.
When the substrate is in the form of a flat plate such as a film, sheet or plate, the thickness of the substrate is not particularly limited. The thickness may generally be about 10 μm or more and 10 cm or less from the viewpoints of manufacturing suitability, mechanical strength, ease of use and economy. When the base material is a film or sheet, the thickness of the base material may be about 20 μm or more and 300 μm or less. When the base material is a plate, the thickness of the base material may be about 1 mm or more and 2 cm or less.

In order to improve the adhesion between the base material and other layers that make up the decorative sheet or material, one or both sides of the base material are subjected to physical surface treatment such as an oxidation method or roughening method, or chemical surface treatment. surface treatment may be applied. Examples of the oxidation method include corona discharge treatment, chromium oxidation treatment, flame treatment, hot air treatment, ozone-ultraviolet treatment, and the like. A sandblasting method, a solvent treatment method, and the like are exemplified as the roughening method. These surface treatments are appropriately selected according to the type of substrate. In general, the corona discharge treatment method is preferable from the viewpoint of surface treatment effect and operability.

《Design layer》
The decorative sheet 20 may include a design layer 40 in order to improve design. The design layer 40 may be arranged near the substrate 30 from the viewpoint of enhancing the weather resistance of the design layer 40 . The design layer 40 may be arranged between the base material 30 and the raised layer 50 . When a primer layer, which will be described later, is provided between the base material 30 and the raised layer 50, the design layer 40 may be positioned between the base material 30 and the primer layer. The base material 30 may be positioned over the entire area of the decorative sheet 20 or may be positioned only in a partial area of the decorative sheet 20 .

Examples of the design layer 40 include a colored layer formed by solidly applying ink; a pattern layer formed by printing a pattern with ink; a metal thin film; and the like.
The patterns (patterns) expressed by the design layer 40 include wood grain patterns such as annual rings and conduit grooves on the surface of the wood plate; stone grain patterns on the surface of stone plates such as marble and granite; texture patterns on the surface of fabric; tile pattern including joint groove; brickwork pattern including joint groove; grain pattern; satin pattern; abstract patterns such as geometric patterns, letters, figures, polka dots and floral patterns; and the like.

The ink used for the colored layer and pattern layer is obtained by appropriately mixing a binder resin with coloring agents such as pigments and dyes, extender pigments, solvents, stabilizers, plasticizers, catalysts, curing agents, ultraviolet absorbers, light stabilizers, and the like. Ink may be used.
The binder resin for the colored layer and pattern layer is not particularly limited. Binder resins for colored layers and pattern layers include, for example, urethane resins, acrylic polyol resins, acrylic resins, ester resins, amide resins, butyral resins, styrene resins, urethane-acrylic copolymers, and vinyl chloride-vinyl acetate copolymer resins. , vinyl chloride-vinyl acetate-acrylic copolymer resin, chlorinated propylene resin, nitrocellulose resin, cellulose acetate resin and the like. Moreover, various types of resins such as a one-liquid curable resin and a two-liquid curable resin with a curing agent such as an isocyanate compound may be used.

Colorants are not particularly limited. Inorganic pigments such as carbon black (ink), iron black, titanium white, antimony white, yellow lead, titanium yellow, red iron oxide, cadmium red, ultramarine blue, cobalt blue; quinacridone red, isoindolinone yellow, nickel azo complex. , phthalocyanine blue, azomethine azo black and other organic pigments or dyes; metal pigments made of scale-like foil pieces such as aluminum and brass; pearl luster (pearl) made of scale-like foil pieces such as titanium dioxide-coated mica and basic lead carbonate Pigments; and the like are exemplified.
The content of the coloring agent is not particularly limited. The content of the coloring agent may be adjusted according to the pattern, color tone and density of the decoration layer, and the material of the coloring agent. In other words, the content of the coloring agent can be freely selected as appropriate in consideration of the factors described above. As an example, the content of the coloring agent may be 20 parts by mass or more and 500 parts by mass or less, or 50 parts by mass or more and 300 parts by mass or less, or It may be more than 200 parts by mass and less than 200 parts by mass.

The colored layer and pattern layer may contain additives such as ultraviolet absorbers, light stabilizers and colorants. The thicknesses of the colored layer and the pattern layer can be appropriately selected according to the desired pattern. The thickness of the colored layer and the pattern layer may be selected from the viewpoint of concealing the ground color of the support material 15 and improving the design. The thickness of the colored layer and pattern layer may be 0.5 μm or more and 20 μm or less, 1 μm or more and 10 μm or less, or 2 μm or more and 5 μm or less.

Examples of metal thin films include thin films of single metal elements such as gold, silver, copper, tin, iron, nickel, chromium, and cobalt; thin films of alloys containing two or more of the above metal elements; Examples of alloys include brass, bronze, stainless steel, and the like.
The film thickness of the metal thin film can be about 0.1 μm to 1 μm.

<Moriage layer>
The build-up layer 50 reduces luster. The raised layer 50 functions as a matte layer. The raised layer 50 provides a tactile sensation. The raised layer 50 includes a raised portion 55 provided in a region overlapping with a partial region of the design layer 40 . As shown in FIG. 2, the raised layer 50 may include a plurality of raised portions 55 spaced apart from each other. The raised layer 50 may include a single raised portion 55 .

When the raised portion 55 is partially located on the design layer 40 , the decorative sheet 20 includes a region having the raised portion 55 and a region not having the raised portion 55 . As a result, gloss contrast can be formed, and a visually perceptible three-dimensional effect can be imparted. The region having the raised portion 55 is more recessed than the region without the raised portion 55 and is easily visible.

The ratio of the area of the raised portion 55 to the total area of the design layer 40 is preferably 5% or more and less than 100%, more preferably 10% or more and 90% or less, and still more preferably 15% or more. It is 80% or less, more preferably 30% or more and 70% or less.

When the raised portion 55 is located in a part of the total area of the design layer 40, that is, when the ratio of the area where the raised portion 55 is provided to the total area of the designed layer 40 is less than 100%, the raised portion 55 is formed. The arrangement of the upper portion 55 may be determined according to the design imparted by the decorative sheet 20 .
For example, when the decorative sheet 20 expresses a "wood grain pattern" of a natural wood board as shown in FIG. The matte layer may be arranged at an appropriate position on the decorative sheet in consideration of the factors forming the wood grain pattern, such as the processing state of the wooden board (planing treatment, embossing treatment, etc.).
In the case of a wood grain pattern with conduit grooves, ridges 55 may be placed in both conduit and non-conduit areas. The raised portion 55 may be arranged only in the conduit area. The ridges 55 may be arranged only in non-conduit groove areas. Arranging the raised portion 55 in the non-conduit groove region is preferable for reproducing the appearance and feel of a natural wood board.
In the case of floating wood planks, ridges 55 may be placed in both the earlywood region 33A and the latewood region 33B. The raised portion 55 may be arranged only in the early wood region 33A. The raised portion 55 may be arranged only in the late wood region 33B. Arranging the raised portion 55 in the early wood region 33A is preferable for reproducing the appearance and feel of the floating wood board.
In a wood grain having knots, the raised portion 55 may be arranged only at the knots 33C. The raised portion 55 may be arranged only on a portion other than the node 33C.

The raised portion 55 includes a binder resin 60 , resin particles 61 and inorganic particles 62 . The raised portion 55 has a partially different thickness. The decorative sheet 20 can provide both tactile sensation and low gloss by having the raised portion 55 having the above configuration.
On the other hand, if the raised portion 55 does not have the above structure, the tactile sensation and low gloss cannot be achieved at the same time for the following reasons.
First, if the raised portion 55 does not contain the inorganic particles 62 but contains only the resin particles 61, the luster of the decorative sheet 20 cannot be reduced.
In addition, when the raised portion 55 does not contain the resin particles 61 but contains only the inorganic particles 62 , the raised portion 55 is whitened, the visibility of the design layer 40 is deteriorated, and the design of the decorative sheet 20 is deteriorated. Moreover, when the raised portion 55 does not include the resin particles 61 but includes only the inorganic particles 62, the luster of the raised portion 55 is extremely reduced, and the natural texture may be lacking. In addition, since the inorganic particles 62 have lower adhesion to the binder resin 60 than the resin particles 61 , the inorganic particles 62 are more likely to fall off the raised portion 55 than the resin particles 61 . Inorganic particles 62 having a large particle diameter are more likely to fall off from the raised portion 55 . Therefore, if the raised portion 55 does not contain the resin particles 61 but contains only the inorganic particles 62, defects due to the dropping of the inorganic particles 62 are likely to occur. Further, since the difference in refractive index between the binder resin 60 and the inorganic particles 62 is relatively large, when the inorganic particles 62 drop off from the raised portion 55, the luster changes greatly.
Further, even if the raised portion 55 contains the resin particles 61 and the inorganic particles 62, if the thickness of the raised portion 55 is not partially different, a sufficient tactile sensation cannot be imparted.

Moreover, when the raised portion 55 contains only the inorganic particles 62, it is difficult to achieve both a tactile feel and a low gloss for the following reasons.
Inorganic particles 62 such as silica to be blended in ink are usually manufactured by a method of increasing the particle size through synthesis. In the manufacturing method by synthesis described above, although particles with a uniform particle size can be manufactured, the maximum particle size is only about 18 μm, and it is difficult to manufacture inorganic particles 62 with a large particle size. As described above, it is difficult to obtain the inorganic particles 62 having a large particle size that can provide a good tactile sensation.
In addition, as a method of manufacturing the inorganic particles 62 such as silica, there is a method of manufacturing by pulverizing a lump of the large inorganic particles 62 . In the above-described production method using pulverization, although the inorganic particles 62 having a large particle size can be obtained, the particle size distribution is extremely wide, ranging from several tens of micrometers to several hundreds of micrometers. For this reason, performance such as touch and low gloss is not stable, and it is not suitable as an additive to be blended into ink.

《Binder Resin》
Examples of the binder resin 60 include a thermoplastic resin and a cured product of a curable resin composition. A cured product of a curable resin composition is preferable as the binder resin 60 from the viewpoint of scratch resistance. That is, the binder resin may contain a cured product of the curable resin composition. The ratio of the cured product of the curable resin composition to the total amount of the binder resin is preferably 50% by mass or more, more preferably 70% by mass or more, still more preferably 90% by mass or more, and still more preferably 100% by mass. % by mass.

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

Examples of the cured product of the curable resin composition include a cured product of a thermosetting resin composition and a cured product of an ionizing radiation-curable resin composition. A cured product of a thermosetting resin composition is preferable in terms of surface properties such as scratch resistance and stain resistance. The cured product of the ionizing radiation-curable resin composition is excellent in scratch resistance and contamination resistance surface performance, and is also excellent in performance maintenance over time.

A thermosetting resin composition is a composition containing at least a thermosetting resin, and is a resin composition that is cured by heating.
Examples of thermosetting resins include acrylic resins, urethane resins, phenol resins, urea melamine resins, epoxy resins, unsaturated polyester resins, and silicone resins. In addition to these thermosetting resins, a curing agent, a curing catalyst, and the like may be added to the thermosetting resin composition.

Among thermosetting resin compositions, a two-liquid curing composition containing a polyol-based resin as a main agent and an isocyanate-based compound as a curing agent is preferred. Examples of polyol-based resins include acrylic polyols and polyester polyols.

The ionizing radiation curable resin composition may be an electron beam curable resin composition or an ultraviolet curable resin composition. An electron beam-curable resin composition is preferable because it does not require a polymerization initiator and therefore has little odor and is less likely to be colored. When the raised portion 55 contains an ultraviolet absorber, which will be described later, the electron beam curable resin composition tends to increase the crosslink density of the raised portion 55 and easily improve the scratch resistance and stain resistance.

The ionizing radiation-curable resin composition is a composition containing a compound having an ionizing radiation-curable functional group (hereinafter also referred to as an "ionizing radiation-curable compound").
The ionizing radiation-curable functional group is a group that is cross-linked and cured by irradiation with ionizing radiation. Examples of ionizing radiation-curable functional groups include functional groups having ethylenic double bonds such as (meth)acryloyl groups, vinyl groups, and allyl groups. Epoxy groups and oxetanyl groups are also exemplified as ionizing radiation-curable functional groups.
As used herein, a (meth)acryloyl group refers to an acryloyl group or a methacryloyl group. As used herein, (meth)acrylate refers to acrylate or methacrylate. Ionizing radiation means electromagnetic waves or charged particle beams that have energy quanta capable of polymerizing or cross-linking molecules. The ionizing radiation may be ultraviolet (UV) or electron beam (EB). Ionizing radiation 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 compound is appropriately selected from polymerizable monomers and polymerizable oligomers (sometimes referred to as "polymerizable prepolymers") conventionally used as ionizing radiation-curable resins. may be

The ionizing radiation-curable compound is preferably a compound having two or more ethylenically unsaturated bond groups. The ionizing radiation-curable compound is more preferably a polyfunctional (meth)acrylate compound having two or more ethylenically unsaturated bond groups. Polyfunctional (meth)acrylate compounds may be either monomers or oligomers.

Among polyfunctional (meth)acrylate compounds, bifunctional (meth)acrylate monomers include ethylene glycol di(meth)acrylate, bisphenol A tetraethoxy diacrylate, bisphenol A tetrapropoxy diacrylate, 1,6-hexane. A diol diacrylate etc. are illustrated.
Trimethylolpropane tri(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol hexa(meth)acrylate, dipentaerythritol tetra (Meth)acrylates, isocyanuric acid-modified tri(meth)acrylates, and the like are exemplified.
Examples of polyfunctional (meth)acrylate oligomers include acrylate 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.

Preferred epoxy (meth)acrylates include (meth)acrylates obtained by reacting tri- or more functional aromatic epoxy resins, alicyclic epoxy resins, aliphatic epoxy resins, etc. with (meth)acrylic acid; (Meth)acrylates obtained by reacting aromatic epoxy resins, alicyclic epoxy resins, aliphatic epoxy resins, etc. with polybasic acids and (meth)acrylic acid, and bifunctional or higher aromatic epoxy resins, alicyclic It is a (meth)acrylate obtained by reacting a group epoxy resin, an aliphatic epoxy resin, or the like with a phenol and (meth)acrylic acid.

The ionizing radiation-curable resins may be used singly or in combination of two or more.

When the ionizing radiation-curable compound is an ultraviolet-curable compound, the ionizing radiation-curable resin composition may contain additives such as a photopolymerization initiator and a photopolymerization accelerator.
Examples of the photopolymerization initiator include one or more selected from acetophenone, benzophenone, α-hydroxyalkylphenone, Michler's ketone, benzoin, benzyldimethylketal, benzoylbenzoate, α-acyloxime ester, thioxanthones and the like.
The photopolymerization accelerator can reduce polymerization inhibition caused by air during curing and increase the curing speed. Examples of the photopolymerization accelerator include one or more selected from p-dimethylaminobenzoic acid isoamyl ester, p-dimethylaminobenzoic acid ethyl ester, and the like.

《Resin particles》
Resin particles 61 include resins such as polymethyl methacrylate, polyacrylic-styrene copolymer, melamine resin, polycarbonate, polystyrene, polyvinyl chloride, benzoguanamine-melamine-formaldehyde condensate, silicone resin, fluorine-based resin, and polyester-based resin. Particles formed from one or more are exemplified. Among these, polymethyl methacrylate particles are preferred. The resin particles 61 may be spherical.

When the average particle diameter of the resin particles is defined as D1, D1 is preferably 20 μm or more and 70 μm or less, more preferably 25 μm or more and 65 μm or less, and even more preferably 30 μm or more and 60 μm or less.
By setting D1 to 20 μm or more, the tactile sensation can be improved. By setting D1 to 20 μm or more, it becomes easier to satisfy the relationship of D2<D1. Thereby, the thickness of the raised portion 55 is partially different, and a complex tactile sensation can be imparted.
By setting D1 to 70 μm or less, it is possible to easily prevent the resin particles 61 from dropping off from the raised portion 55 .
The ratio of the number of resin particles having a particle diameter within ±20 μm of the average particle diameter to all the resin particles 61 is preferably 70% or more, more preferably 80% or more, and still more preferably 90% or more. Yes, more preferably 95% or more.

The particle diameter (μm) of the resin particles is defined as the maximum width, that is, the maximum length of the resin particles in plan view of the decorative sheet. As shown in FIG. 2, the particle diameter (μm) of the resin particles is defined as the maximum width, that is, the maximum length of the resin particles when the decorative sheet is enlarged and observed from the normal direction D3. The average particle diameter (μm) of the resin particles was determined by observing ten areas of the decorative sheet each having an area of 1000 μm×1000 μm by enlarging them from the normal direction of the decorative sheet. The particle diameter of the particles is measured and specified as the average value (μm) of the particle diameters of thirty resin particles measured from ten regions.

The content of the resin particles 61 is preferably 5 parts by mass or more and 35 parts by mass or less, more preferably 10 parts by mass or more and 30 parts by mass or less, and still more preferably 15 parts by mass with respect to 100 parts by mass of the binder resin. 25 parts by mass or less. By setting the content of the resin particles 61 to 5 parts by mass or more, the tactile sensation of the resin particles 61 can be emphasized. By setting the content of the resin particles 61 to 35 parts by mass or less, it is possible to suppress an increase in luster due to the resin particles 61 and to impart a natural texture to the decorative sheet 20 .

《Inorganic particles》
The inorganic particles 62 may be particles formed from one or more inorganic substances such as silica, alumina, zirconia and titania. Among these, silica is preferable as the material for the inorganic particles 62 . The inorganic particles may be spherical or amorphous.

When the average particle diameter of the inorganic particles is defined as D2, D2 is preferably 5 µm or more and 20 µm or less, more preferably 7 µm or more and 17 µm or less, and still more preferably 10 µm or more and 15 µm or less. Gloss can be reduced by setting D2 to 5 μm or more. By setting D2 to 20 μm or less, it becomes easier to satisfy the relationship of D2<D1. Thereby, the thickness of the raised portion 55 is partially different, and a complex tactile sensation can be imparted.
In addition, the ratio of the inorganic particles 62 larger than the average particle diameter by 20 μm or more to the total inorganic particles 62 is preferably 30% or less, more preferably 20% or less, and still more preferably 10% or less. Preferably, it is 5% or less.

The particle diameter (μm) of the inorganic particles is defined as the maximum width, that is, the maximum length of the inorganic particles in the longitudinal section of the decorative sheet. That is, as shown in FIGS. 3 and 4, the particle diameter (μm) of the inorganic particles is defined as the maximum width, that is, the maximum length of the inorganic particles in a cross section along the normal direction D3 of the decorative sheet. The average particle diameter (μm) of the inorganic particles is obtained by observing 30 cross-sectional areas having a length of 1000 μm along the direction orthogonal to the normal direction of the decorative sheet, and observing the largest inorganic particle in each cross-sectional area. The particle size is measured and specified as the average value (μm) of the particle sizes of the thirty inorganic particles measured.

The content of the inorganic particles 62 is preferably 4 parts by mass or more and 30 parts by mass or less, more preferably 7 parts by mass or more and 25 parts by mass or less, and still more preferably 10 parts by mass with respect to 100 parts by mass of the binder resin. 20 parts by mass or less. By setting the content of the inorganic particles 62 to 4 parts by mass or more, the luster can be lowered. By setting the content of the inorganic particles 62 to 30 parts by mass or less, the reduction in visibility due to whitening of the matte layer is suppressed, and the luster of the raised portion 55 is extremely reduced, resulting in a loss of natural texture. can be suppressed.

<<Relationship between Resin Particles, Inorganic Particles, and Binder Resin>>
D1 indicating the average particle size of the resin particles and D2 indicating the average particle size of the inorganic particles satisfy D2<D1. The raised portion 55 includes a convex portion 56 formed by protruding inorganic particles 62 . Here, "inorganic particles protrude" means that, as shown in FIG. 4, at least one inorganic particle 62A is positioned between the other adjacent inorganic particles 62B and has a thickness greater than the minimum thickness TA of the raised portion 55. It means protruding in the third direction D3. That is, at least part of the inorganic particles 62A is located on the first side in the third direction D3 from the position where the minimum thickness TA of the raised portion 55 is obtained. located in In the illustrated example, recesses 57 are formed between inorganic particles 62A and inorganic particles 62B. The top of the inorganic particles 62A is positioned on the first side in the third direction D3 from the position of the minimum thickness TA in the recess 57. As shown in FIG. The top of the inorganic particles 62B is located on the first side in the third direction D3 from the position of the minimum thickness TA in the recess 57. As shown in FIG.

According to this configuration, the thickness of a portion of the raised portion 55 can be set to a thickness corresponding to the particle diameter of the resin particles 61, and the thickness of the other portion of the raised portion 55 can be set to a thickness corresponding to the particle diameter of the inorganic particles 62. It can be made thick. As a result, as shown in FIG. 3, the decorative sheet 20 has a region RX where the raised portion 55 is not provided, a region RZ where the resin particles 61 of the raised portion 55 protrude, and the inorganic particles 62 of the raised portion 55. and an area RY in which is set. In the illustrated example, the thickness of the area where the resin particles 61 do not exist in the raised portion 55 is the same as the particle diameter of the inorganic particles 62 . The decorative sheet 20 has different heights in these three regions RX, RY and RZ. When the decorative sheet 20 is touched, a strong tactile sensation is imparted from the resin particles 61 in the region RZ. In addition, in the region RY whose thickness is defined by the inorganic particles 62, a strong tactile sensation due to the presence of the inorganic particles 62 is imparted. As a result, three areas with different heights can be clearly perceived via the sense of touch. In addition, the tops of the projections 56 are dispersed at a higher density than the resin particles 61 in the region RY. A complex tactile sensation can be expressed by the dispersed tops of the projections 56 . With these, it is possible to impart a strong tactile sensation with rich expression.

Furthermore, the surfaces of the inorganic particles 62 are low gloss. In the region RY whose thickness is defined by the inorganic particles 62 , the inorganic particles 62 protrude from the binder resin 60 and are exposed from the binder resin 60 . Alternatively, the inorganic particles 62 are located near the surface of the raised portion 55 . Therefore, the luster of the raised portion 55 can be sufficiently reduced. Note that FIG. 2 shows only the inorganic particles 62 exposed from the binder resin 60 .

The resin particles 61 protrude from the binder resin 60 . As shown in FIG. 3 , the tops of the resin particles 61 may be covered with the binder resin 60 or exposed from the binder resin 60 .

As described above, it is possible to provide the decorative sheet 20 with excellent tactile sensation and to reduce the luster of the decorative sheet 20 . That is, various tactile sensations can be emphasized and gloss can be reduced. Therefore, according to the decorative sheet 20, the artificial impression can be weakened and a natural texture can be created. The tactile feel and low luster of the decorative sheet 20 make it possible to more faithfully represent complex natural objects such as the surface of wood and the surface of stone. This raised layer 50 is suitable for combination with the design layer 40 displaying a natural object.

In addition, the inorganic particles 62 have lower adhesion to the binder resin 60 than the resin particles 61 do. Therefore, the inorganic particles 62 are more likely to fall off the raised portion 55 than the resin particles 61 . In the case of D1<D2, the inorganic particles 62 are likely to drop off from the raised portion 55 . On the other hand, if D2<D1, it is possible to prevent the inorganic particles 62 from dropping off from the raised portion 55 . Further, by setting D2<D1, it is possible to easily realize a configuration in which the thickness of the raised portion 55 is partially different.

The following configuration may be adopted in order to make the effect of achieving both tactile sensation and low gloss more pronounced.

The average particle diameter of the resin particles 61 may be larger than the average thickness of the raised portion 55 . According to this example, the thickness of the raised portion 55 at the position R2 where the resin particles 61 are present is significantly different from the thickness of the raised portion 55 at the region R1 where the inorganic particles 62 are present. Therefore, the tactile sensation imparted by the resin particles 61 and the tactile sensation imparted by the inorganic particles 62 can be greatly different. Thereby, the raised layer 50 can provide a more complicated tactile sensation.

The average particle diameter D2 of the inorganic particles 62 may be larger than half the average thickness T of the raised portion 55 . That is, the relationship of T/2<D2 may be established. According to this example, the thickness of the raised portion 55 does not become too thick with respect to the particle diameter of the inorganic particles 62 . As shown in FIG. 3 , the thickness of the region of the raised portion 55 where the resin particles 61 are not present can be the same as the particle diameter of the inorganic particles 62 . Therefore, it is possible to suppress the inorganic particles 62 from arranging in the third direction D<b>3 within the raised portion 55 . As a result, the thickness of the raised portion 55 in the region R1 where the resin particles 61 of the raised portion 55 do not exist is more likely to be the thickness corresponding to the particle diameter of the inorganic particles 62 . Accordingly, in the region R1, the inorganic particles 62 are exposed on the surface of the raised portion 55, or the inorganic particles 62 are located near the surface of the raised portion 55. As shown in FIG. As a result, the tactile sensation in the region R1 can be emphasized, and the luster can be effectively reduced. In addition, the contact area of the inorganic particles 62 with the binder resin 60 is increased, so that falling off from the binder resin 60 can be effectively suppressed.

The thickness (μm) of the raised portion is the length (μm) of the raised portion along the normal direction of the decorative sheet. The average thickness (μm) of the raised portion is the average value of the thickness at 30 points measured every 100 μm in the direction orthogonal to the normal direction in the vertical cross section of the decorative sheet, that is, the cross section along the normal direction of the decorative sheet. (μm).

Further, as shown in FIG. 4, the raised portion 55 may have a concave portion 57 between the two convex portions 56A and 56B. The convex portion 56A is one convex portion formed by protruding one inorganic particle 62A. The convex portion 56B is another convex portion formed by protruding another inorganic particle 62B. One inorganic particle 62A and another inorganic particle 62B are adjacent to each other in a direction perpendicular to the third direction D3, which is the first direction D1 in the illustrated example. In this example, the thickness TA of the raised portion 55 in at least one recessed portion 57A may be smaller than the average thickness T of the raised portion 55 . The thickness TA of the raised portion 55 in at least one concave portion 57A may be smaller than the particle diameter D2A of one inorganic particle 62A or smaller than the particle diameter D2B of another inorganic particle 62B. The thickness TA of the raised portion 55 in at least one recessed portion 57A may be smaller than the average particle diameter D2 of the inorganic particles 62 . According to any of these examples, the inorganic particles 62 are exposed on the surface of the raised portion 55 in the region R1 of the raised portion 55 where the resin particles 61 do not exist, or the inorganic particles 62 are located near the surface of the raised portion 55. do. As a result, the tactile sensation in the region R1 can be emphasized, and the luster can be effectively reduced.

As shown in FIG. 4 , at least some top portions of the inorganic particles 62C may be exposed from the binder resin 60 . The inorganic particles 62C can effectively reduce the luster of the decorative sheet.

The difference between D1 and D2 may be within a predetermined range in order to easily achieve both tactile sensation and low glossiness. Specifically, D1-D2 is preferably 15 μm or more and 60 μm or less, more preferably 25 μm or more and 50 μm or less, and still more preferably 30 μm or more and 45 μm or less.

The average particle size of the resin particles 61 may be larger than twice the average particle size of the inorganic particles 62 . According to this example, the difference between the particle diameters of the resin particles 61 and 62 can be increased. Then, two peaks can be given to the particle size distribution of the particles 61 and 62 contained in the raised portion 55 . Thereby, the tactile sensation caused by the resin particles 61 and the tactile sensation caused by the inorganic particles 62 can be greatly different. As a result, the decorative sheet 20 can have a complex tactile feel. The average particle size of the resin particles 61 may be five times or less the average particle size of the inorganic particles 62 . By setting an upper limit on the difference between the average particle size of the resin particles 61 and the average particle size of the inorganic particles 62 , both the resin particles 61 and the inorganic particles 62 can be made difficult to fall off from the binder resin 60 .

The average thickness of the raised portion 55 at the position where the resin particles 61 do not exist may be 80% or more and 130% or less, 85% or more and 125% or less, or 90% or more and 120% or less of the average particle diameter of the inorganic particles 62. good. According to this example, the thickness of the raised portion 55 does not become too thick with respect to the particle diameter of the inorganic particles 62 . Therefore, it is possible to suppress the inorganic particles 62 from arranging in the third direction D<b>3 within the raised portion 55 . As a result, the thickness of the raised portion 55 in the region R1 where the resin particles 61 of the raised portion 55 do not exist is more likely to be the thickness corresponding to the particle diameter of the inorganic particles 62 . Accordingly, in the region R1, the inorganic particles 62 are exposed on the surface of the raised portion 55, or the inorganic particles 62 are located near the surface of the raised portion 55. As shown in FIG. As a result, the tactile sensation in the region R1 can be emphasized, and the luster can be effectively reduced.

The average thickness (μm) at the position where the resin particles are not present in the raised portion is the thickness (μm) measured at 30 locations at 100 μm intervals in the direction perpendicular to the normal direction in the longitudinal section of the decorative sheet. The average value (μm) of the measured values at the measurement points where the particles 61 did not exist.

The resin particles and the inorganic particles are preferably used at a predetermined ratio in order to achieve both good touch and low gloss. Specifically, with respect to 100 parts by mass of the resin particles, the content of the inorganic particles is preferably 40 parts by mass or more and 200 parts by mass or less, more preferably 50 parts by mass or more and 150 parts by mass or less, and still more preferably It is 60 mass parts or more and 90 mass parts or less.

《Thickness》
The heaping layer 50 may have a partially different thickness. The tactile sensation can be emphasized by partially varying the thickness of the raised portion 55 . In order to make the thickness of the raised portion 55 partially different, the raised portion 55 preferably contains particles with different particle diameters.

Furthermore, by forming the raised layer 50 by gravure printing using a gravure plate having a partially different plate depth, the thickness of the raised portion 55 can be made different in parts, and the tactile sensation can be emphasized. A gravure plate has a large number of independent cells on its surface. In a gravure plate having partially different plate depths, the depth of some cells is different from the depth of other cells. For example, the shallow cells may preferably be 5 μm to 40 μm deep, more preferably 10 μm to 30 μm deep. The deep cells may preferably be 40 μm or more and 150 μm or less in depth, more preferably 60 μm or more and 120 μm or less in depth.
In a gravure plate having partially different plate depths, a large amount of ink for the matte layer is filled in a deep portion of the plate. A small amount of ink for the matte layer is filled in a portion where the depth of the plate is shallow. Therefore, by performing gravure printing with a gravure plate having a partially different plate depth, it is possible to form the raised portion 55 having a partially different thickness.
Further, in a gravure plate having partially different plate depths, resin particles having a large average particle size are likely to be filled in areas where the plate depth is deep. Inorganic particles with a small average particle size are likely to be filled in areas where the plate depth is shallow. By using gravure plates having partially different plate depths, the thickness of the raised portion 55 can be made different not only by the difference in the filling amount of ink but also by the difference in the filled particles. The size of each individual cell in the gravure plate is so small that it cannot be easily recognized by humans. Similarly, the cell spacing is too short to be easily recognized by humans. Since ink levels after gravure printing, print areas of adjacent cells may be connected. For these reasons, if the build-up layer 50 is formed by a gravure plate having a partially different plate depth, the build-up layer 50 can be integrated to achieve both tactile sensation and low gloss. When the raised portions 55 are separated from each other as in FIGS.

The bulging layer 50 satisfies the following (1) and (2) when R1 is defined as a region where the thickness of the ridged portion 55 is more than 6 μm and 20 μm or less, and R2 is defined as a region where the thickness of the ridged portion 55 is more than 20 μm and 55 μm or less. is preferred.
(1) R1 accounts for 35% or more and 55% or less of the total area of the region where the raised portion 55 is provided.
(2) R2 accounts for 20% or more and 40% or less of the total area of the region where the raised portion 55 is provided.
By satisfying the above (1) and (2), it is possible to suppress uniformity of the tactile sensation and luster in the plane of the raised layer 50 . If the tactile sensation in the surface of the raised layer 50 is made uniform, the tactile sensation itself may be reduced due to the impression of an artificial object or less undulations. In addition, if the in-plane luster of the raised layer 50 is made uniform, the impression of an artificial object becomes strong, and it is difficult to express the appearance of a natural object such as natural wood. Therefore, by satisfying the above (1) and (2), the tactile sensation can be emphasized and the texture of the natural object can be enhanced.

The bulging layer 50 further satisfies the following (3) and (4) when the region where the thickness of the bulging portion 55 is 6 μm or less is defined as R0, and the region where the thickness of the bulging portion 55 is more than 55 μm is defined as R3. preferable.
(3) The ratio of R0 to the total area of the region where the raised portion 55 is provided is 20% or less.
(4) R3 accounts for 5% or less of the total area of the region where the raised portion 55 is provided.
By satisfying the above (3), low can be effectively reduced. By satisfying the above (4), it is possible to suppress deterioration in tactile sensation due to the presence of extremely thick regions.

The thickness of each portion of the raised portion 55 can be measured, for example, from a cross-sectional photograph of the decorative sheet.
The thickness distribution of the raised portion 55 can be calculated, for example, in the following steps (X1) to (X3). The above area ratios of R0, R1, R2 and R3 can also be calculated from the thicknesses obtained in the following steps (X1) to (X3).
(X1) Prepare 10 cross-sectional photographs in which the width of the raised portion 55 is in the range of 500 μm to 1500 μm.
(X2) In each cross-sectional photograph, the thickness of the raised portion 55 is calculated for each 5 μm in the width direction of the matte layer. (When the width of the raised portion 55 in each cross-sectional photograph is 500 μm, the thickness of the matte layer at 100 locations in each cross-sectional photograph is calculated.)
(X3) Calculate the thickness distribution of the raised portion 55 based on the total thickness data calculated from the ten cross-sectional photographs.

The average thickness of the raised portion 55 is preferably 10 μm or more and 70 μm or less, more preferably 12 μm or more and 60 μm or less, and still more preferably 15 μm or more and 50 μm or less.

The raised portion 55 may contain an additive as necessary. Examples of additives include antioxidants, ultraviolet absorbers, light stabilizers, leveling agents, and the like.

For the raised layer 50, for example, an ink for raised layer containing a material (binder resin, resin particles, inorganic particles, etc.) constituting the raised portion 55 and a solvent added as necessary is applied on the design layer 40 and dried. , can be made by curing.

<Other layers>
The decorative sheet 20 may include layers other than the base material 30 , the design layer 40 and the raised layer 50 . Examples of other layers include a primer layer, a surface protection layer, an adhesive layer, and the like.

《Primer layer》
The decorative sheet 20 may include a primer layer for the purpose of improving adhesion.

The primer layer is mainly composed of a binder resin. The primer layer may contain additives such as ultraviolet absorbers and light stabilizers, if necessary.
As binder resins, urethane resins, acrylic polyol resins, acrylic resins, ester resins, amide resins, butyral resins, styrene resins, urethane-acrylic copolymers, polycarbonate-based urethane-acrylic copolymers (having a carbonate bond in the polymer main chain) and a polymer having two or more hydroxyl groups at the terminal and side chain (polycarbonate polyol)-derived urethane-acrylic copolymer), vinyl chloride-vinyl acetate copolymer resin, vinyl chloride-vinyl acetate-acrylic copolymer Examples include resins such as resins, chlorinated propylene resins, nitrocellulose resins (nitrocellulose), and cellulose acetate resins. Binder resin may contain these independently and may contain multiple types. The binder resin may be obtained by adding a curing agent such as an isocyanate-based curing agent or an epoxy-based curing agent to these resins, followed by cross-linking and curing. As a specific example, the binder resin may be obtained by cross-linking and curing a polyol-based resin such as an acrylic polyol resin with an isocyanate-based curing agent, or may be obtained by cross-linking and curing an acrylic polyol resin with an isocyanate-based curing agent.

The primer layer may contain an ultraviolet absorber and/or a light stabilizer in order to further improve weather resistance. The primer layer may contain a general-purpose ultraviolet absorber and a general-purpose light stabilizer.

The thickness of the primer layer is preferably 0.01 μm or more and 10 μm or less, more preferably 0.7 μm or more and 8 μm or less, and still more preferably 1.0 μm or more and 6 μm or less.

《Surface protective layer》
The decorative sheet 20 may include a surface protective layer on the side of the raised layer 50 opposite to the substrate.
By including the surface protective layer, the durability of the decorative sheet 20 can be enhanced. The surface protective layer is preferably formed at least on the raised portion 55, and more preferably formed over the entire surface of the decorative sheet. That is, when the raised portion 55 is formed on a portion of the base material 30, the surface protective layer can be formed on both the portion where the raised portion 55 exists and the portion where the raised portion 55 does not exist. more preferred.

The surface protective layer may contain a resin component as a main component. The main component means 50% by mass or more, preferably 70% by mass or more, of the total solid content of the surface protective layer.
The resin component of the surface protective layer is preferably a cured product of a curable resin composition. The ratio of the cured product of the curable resin composition to the total amount of the resin component is preferably 50% by mass or more, more preferably 70% by mass or more, still more preferably 90% by mass or more, and still more preferably 100% by mass. % by mass. The cured product of the curable resin composition forming the surface protective layer may be the same as the cured product of the curable resin composition forming the raised portion 55 .

The surface protective layer may contain additives as necessary. Examples of additives include antioxidants, ultraviolet absorbers, light stabilizers, matting agents, leveling agents, and the like.

The thickness of the surface protective layer is preferably 2 μm or more and 20 μm or less, more preferably 4 μm or more and 16 μm or less, and still more preferably 5 μm or more and 12 μm or less.

《Adhesive layer》
The decorative sheet 20 may include an adhesive layer on the side of the substrate 30 opposite to the raised layer 50 . Further, the decorative sheet 20 may be joined to the support material 15 by the adhesive.

The adhesive used for the adhesive layer is not particularly limited. The adhesive used for the adhesive layer may be a known adhesive. The adhesive used for the adhesive layer may be, for example, an adhesive such as a heat-sensitive adhesive or a pressure-sensitive adhesive. Resins used for the adhesive constituting this adhesive layer include acrylic resins, polyurethane resins, vinyl chloride resins, vinyl acetate resins, vinyl chloride-vinyl acetate copolymer resins, styrene-acrylic copolymer resins, polyester resins, and polyamide resins. etc. are exemplified. The material constituting the adhesive layer may contain one of these materials, or may contain a plurality of them. The adhesive layer may be a two-pack curable polyurethane adhesive or a polyester adhesive using an isocyanate compound or the like as a curing agent. The adhesive layer may be an adhesive. Examples of adhesives include acrylic, urethane, silicone, and rubber adhesives.

The adhesive layer is prepared by coating the above resin in a form that can be applied, such as a solution or emulsion, by means of gravure printing, screen printing, reverse coating using a gravure plate, or the like, followed by drying. can be
The thickness of the adhesive layer is not particularly limited. From the viewpoint of obtaining excellent adhesiveness, the thickness of the adhesive layer may be 1 μm or more and 100 μm or less, 5 μm or more and 50 μm or less, or 10 μm or more and 30 μm or less.

<Application>
The decorative material 100 and the decorative sheet 20 of the present disclosure can be used for various purposes. The following (1) to (9) are exemplified as specific applications.
(1) Surface materials for interior parts such as walls, floors, and ceilings of buildings such as houses, offices, stores, hospitals, and clinics.
(2) Surface materials for exterior parts such as outer walls, roofs, eaves, and door pockets of buildings such as houses, offices, stores, hospitals, and clinics.
(3) Surface materials for fittings such as windows, window frames, doors, and door frames (interior parts or exterior parts); surface materials for fixtures associated with fittings (handles, etc.); surface materials for jigs for fittings.
(4) Surface materials for handrails, waist walls, rims, sills, kamoi, and coping members.
(5) Surface materials for outdoor (exterior) parts such as fences, gates, pillars for drying racks, and handrails.
(6) Surface materials for furniture such as chests of drawers, desks, chairs, cupboards, and kitchen sinks; surface materials for accessories (such as handles) for furniture; surface materials for jigs for furniture.
(7) Surface materials for casings of various household appliances such as television receivers, radio receivers, refrigerators, microwave ovens, washing machines, fans, and air conditioners; surface material; home appliance jig surface material.
(8) Surface materials for OA equipment such as electronic copiers, facsimiles, printers, personal computers, and other computing equipment; Surface materials for accessories (keyboards, touch panels, etc.) for OA equipment; surface materials for jigs for various types of OA equipment.
(9) Surface materials for interior or exterior parts (walls, floors, ceilings, handrails, struts, operation panels, levers, steering wheels, steering wheels, etc.) of vehicles such as automobiles, railway vehicles, ships, aircraft, etc. .

An embodiment of the present disclosure relates to [1] to [13] and [A] to [H] below.
[1] A design layer displaying a design,
comprising the design layer and a laminated ridge layer,
The raised layer includes a raised portion provided in a region overlapping with a partial region of the design layer,
The raised portion contains a binder resin, resin particles and inorganic particles,
The average particle size of the resin particles is larger than the average particle size of the inorganic particles,
The decorative sheet, wherein the raised portion includes a convex portion formed by protruding the inorganic particles.
[2] The average particle diameter of the resin particles is larger than the average thickness of the raised portion,
The decorative sheet according to [1], wherein the average particle size of the inorganic particles is larger than half the average thickness of the raised portion.
[3] The raised portion includes one convex portion formed by protruding one of the inorganic particles, another convex portion formed by protruding another one of the inorganic particles, a concave portion positioned between the one convex portion and the other one convex portion;
The decorative sheet of [1] or [2], wherein the thickness of the raised portion in at least one of the recessed portions is smaller than the average thickness of the raised portion.
[4] The raised portion includes one convex portion formed by protruding one of the inorganic particles, another convex portion formed by protruding another one of the inorganic particles, a concave portion positioned between the one convex portion and the other one convex portion;
Any one of [1] to [3], wherein the thickness of the raised portion in at least one of the concave portions is smaller than the particle diameter of the one inorganic particle and smaller than the particle diameter of the other inorganic particle. cosmetic sheet.
[5] The raised portion includes one convex portion formed by protruding one of the inorganic particles, another convex portion formed by protruding another one of the inorganic particles, a concave portion positioned between the one convex portion and the other one convex portion;
The decorative sheet according to any one of [1] to [4], wherein the thickness of the raised portion in at least one of the recessed portions is smaller than the average particle size of the inorganic particles.
[6] The decorative sheet according to any one of [1] to [5], wherein the tops of at least some of the inorganic particles are exposed from the binder resin.
[7] The decorative sheet according to any one of [1] to [6], wherein the average particle size of the resin particles is larger than twice the average particle size of the inorganic particles.
[8] The decorative sheet according to any one of [1] to [7], wherein the average thickness of the raised portion at the position where the resin particles do not exist is 80% or more and 130% or less of the average particle diameter of the inorganic particles. .
[9] the average particle size of the resin particles is 20 μm or more and 70 μm or less;
The decorative sheet according to any one of [1] to [8], wherein the inorganic particles have an average particle size of 5 μm or more and 20 μm or less.
[10] The decorative sheet according to any one of [1] to [9], wherein the raised portion contains 100 parts by mass of the resin particles and 40 parts by mass or more and 200 parts by mass or less of the inorganic particles.
[11] The following (1) and (2) are satisfied when R1 is defined as a region where the thickness of the ridge is more than 6 μm and 20 μm or less, and R2 is defined as a region where the thickness of the ridge is more than 20 μm and 55 μm or less. 1] The decorative sheet according to any one of [10].
(1) R1 accounts for 35% or more and 55% or less of the total area of the region where the ridge is provided.
(2) R2 accounts for 20% or more and 40% or less of the total area of the region provided with the raised portion.
[12] The cosmetic of [11], which satisfies the following (3) and (4) when the region where the thickness of the raised portion is 6 μm or less is defined as R0, and the region where the thickness of the raised portion is more than 55 μm is defined as R3. sheet.
(3) R0 accounts for 20% or less of the total area of the region where the raised portion is provided.
(4) R3 accounts for 5% or less of the total area of the region where the raised portion is provided.
[13] A decorative sheet according to any one of [1] to [12];
and a support member that supports the decorative sheet.
[A] A decorative sheet having a raised portion on at least a part of a base material,
The raised portion contains a binder resin, resin particles and inorganic particles,
A decorative sheet in which the thickness of the raised portion is partially different.
[B] The decorative sheet according to [A], wherein D2<D1, where D1 is the average particle size of the resin particles and D2 is the average particle size of the inorganic particles.
[C] When the average particle diameter of the resin particles is defined as D1 and the average particle diameter of the inorganic particles is defined as D2, D1 is 20 μm or more and 70 μm or less and D2 is 5 μm or more and 20 μm or less, [A] or [B ] The cosmetic sheet described in .
[D] The decorative sheet according to any one of [A] to [C], containing 40 parts by mass or more and 200 parts by mass or less of the inorganic particles with respect to 100 parts by mass of the resin particles.
[E] The following (1) and (2) are satisfied when R1 is defined as a region where the thickness of the ridge is more than 6 μm and 20 μm or less, and R2 is defined as a region where the thickness of the ridge is more than 20 μm and 55 μm or less. A] The decorative sheet according to any one of [D].
(1) R1 accounts for 35% or more and 55% or less of the total area of the region where the raised portion is provided.
(2) R2 accounts for 20% or more and 40% or less of the total area of the region where the raised portion is provided.
[F] Furthermore, when the region where the thickness of the ridge is 6 μm or less is defined as R0, and the region where the thickness of the ridge is more than 55 μm is defined as R3, the following (3) and (4) are satisfied, [E] The cosmetic sheet described in .
(3) R0 accounts for 20% or less of the total area of the region where the raised portion is provided.
(4) R3 accounts for 5% or less of the total area of the region where the raised portion is provided.
[G] The decorative sheet according to any one of [A] to [F], which has the raised portion on a partial region of the base material.
[H] The decorative sheet according to any one of [A] to [G], which has a design layer between the substrate and the raised portion.

The present disclosure will be described in more detail by way of examples. The present disclosure is not limited to the following examples.

1. Measurements and Evaluations Measurements and evaluations of the decorative sheets of Examples and Comparative Examples were performed as follows. The atmosphere during each measurement and evaluation was set at a temperature of 23±5° C. and a relative humidity of 40% or more and 65% or less. Moreover, before starting each measurement and evaluation, the target sample was exposed to the atmosphere for 30 minutes or more, and then the measurement and evaluation were performed. Table 1 shows the results.

1-1. Tactile Feel Twenty subjects evaluated the tactile feel of the decorative sheets obtained in Examples and Comparative Examples. The 20 subjects were five people each in their 20s, 30s, 40s, and 50s. Each subject touched the surface of the decorative sheet with the pad of the index finger of the dominant hand, and evaluated whether the tactile sensation was excellent. The evaluation criteria for whether or not the tactile sensation is excellent were "whether or not the unevenness is felt strongly" and "whether or not the feeling is natural without an artificial feeling of discomfort". Table 1 shows the results of classifying the aggregated tactile evaluations according to the following criteria.
A: More than 18 out of 20 people answered that the tactile sensation was excellent.
B: 15 or more and 17 or less out of 20 people answered that the tactile sensation was excellent.
C: 11 or more and 14 or less out of 20 people answered that the tactile sensation was excellent.
D: Less than 10 out of 20 people answered that the tactile sensation was excellent.

1-2. Low Gloss Twenty subjects evaluated the gloss of the decorative sheets obtained in Examples and Comparative Examples. The 20 subjects were five people each in their 20s, 30s, 40s, and 50s. Each subject visually observed the decorative sheet from the raised layer side, and evaluated whether or not the luster of the portion having the raised portion was reduced. The evaluation was performed under fluorescent lighting in a room where outside light was blocked. The evaluation criterion for determining whether or not the luster was reduced was whether or not the luster was sufficiently reduced in a portion having a raised portion as compared to a portion having no raised portion. Table 1 shows the results of classifying the aggregated evaluation of low gloss according to the following criteria.
A: More than 18 out of 20 people answered that the luster of the raised portion was reduced.
B: 15 or more and 17 or less out of 20 people answered that the luster of the raised portion was reduced.
C: 11 or more and 14 or less out of 20 people answered that the luster of the raised portion was reduced.
D: Less than 10 out of 20 people answered that the luster of the raised portion was reduced.

2. Preparation of decorative sheet [Example 1]
A colored base paper for building materials (“CHPS45 (model number)”, basis weight: 45 g/m 2 , manufactured by Tenma Special Paper Co., Ltd.) was used as the base material. A resin composition containing a mixed resin of acrylic resin and urethane resin as a binder, and titanium white, red iron oxide, and yellow lead as coloring agents is applied to the surface of the substrate that has been treated for easy adhesion by gravure printing. A colored layer having a thickness of 5 μm was formed.
Next, on the colored layer, a pattern layer with a wood grain pattern was formed using a resin composition containing a coloring agent containing nitrocellulose as a binder and red iron oxide as a main component. A design layer was formed on the substrate by the colored layer and the pattern layer.
Next, a primer layer ink containing a two-component curing resin (main agent: acrylic polyol, curing agent: hexamethylene diisocyanate) was applied to the entire surface of the design layer and dried to form a primer layer having a thickness of 5 μm.
Subsequently, a build-up layer ink 1 having the following formulation was applied to a part of the primer layer by gravure printing and dried to form a build-up layer. A gravure printing plate having two types of cell depths was used (a plate having cells with a depth of 20 μm and cells with a depth of 90 μm at an area ratio of 3:1). The solid content adhesion amount of ink 1 for the raised layer was about 4 g/m 2 on average in the area where the ink adhered. Thereafter, heat curing was performed at 70° C. for 24 hours to obtain a decorative sheet of Example 1. Microscopic observation of the vertical cross section of the obtained decorative sheet revealed that the raised portion contained projections formed by protruding inorganic particles.

<Ink 1 for matte layer>
・ Two-component curing resin 100 parts by mass (main agent: acrylic polyol, curing agent: hexamethylene diisocyanate)
・ Resin particles 20 parts by mass (spherical polymethyl methacrylate particles, average particle size 50 μm)
・ Inorganic particles 15 parts by mass (spherical silica particles, average particle size 12 μm)
・Appropriate amount of solvent

[Example 2]
A decorative sheet of Example 2 was obtained in the same manner as in Example 1, except that the resin particles of Ink 1 for the raised layer were changed to spherical polymethyl methacrylate particles having an average particle diameter of 35 μm. Microscopic observation of the vertical cross section of the obtained decorative sheet revealed that the raised portion contained projections formed by protruding inorganic particles.

[Example 3]
A decorative sheet of Example 3 was obtained in the same manner as in Example 1, except that the added amount of the resin particles and the added amount of the inorganic particles were changed to 23 parts by mass and 11 parts by mass, respectively. Microscopic observation of the vertical cross section of the obtained decorative sheet revealed that the raised portion contained projections formed by protruding inorganic particles.

[Comparative Example 1]
A decorative sheet of Comparative Example 1 was obtained in the same manner as in Example 1, except that the resin particles were removed from the buildup layer ink 1 and the amount of inorganic particles added was changed from 14 parts by mass to 27 parts by mass.

[Comparative Example 2]
A decorative sheet of Comparative Example 2 was obtained in the same manner as in Example 1 except that the inorganic particles were removed from the buildup layer ink 1 and the amount of resin particles added was changed from 19 parts by mass to 37 parts by mass.
[Comparative Example 3]
The inorganic particles of Ink 1 for the raised layer were changed to spherical silica particles having an average particle diameter of 6 μm. The amount of the inorganic particles added in Ink 1 for the build-up layer was maintained at 15 parts by mass. A decorative sheet of Comparative Example 3 was obtained in the same manner as in Example 1 except for the average particle size of the inorganic particles. Microscopic observation of the vertical cross section of the obtained decorative sheet revealed that the raised portion did not include a convex portion formed by protruding inorganic particles. The inorganic particles were buried in the binder resin and did not protrude from the binder resin.

100: decorative material, 15: support material, 20: decorative sheet, 30: base material, 40: design layer, 50: raised layer, 55: raised portion, 56, 56A, 56B: convex portion, 57, 57A: concave portion, 60: binder resin, 61: resin particles, 62: inorganic particles

Claims (18)

a design layer that displays a design;
comprising the design layer and a laminated ridge layer,
The raised layer includes a raised portion provided in a region overlapping with a partial region of the design layer,
The raised portion contains a binder resin, resin particles and inorganic particles,
The average thickness of the raised portion is 12 μm or more and 60 μm or less,
The average particle size of the resin particles is larger than the average particle size of the inorganic particles,
The raised portion includes a convex portion formed by projecting the inorganic particles,
The decorative sheet, wherein the raised portion is provided according to the design displayed by the design layer. a design layer that displays a wood grain design;
comprising the design layer and a laminated ridge layer,
The raised layer includes a raised portion provided only in a region overlapping with a partial region of the design layer,
The raised portion contains a binder resin, resin particles and inorganic particles,
The average thickness of the raised portion is 12 μm or more and 60 μm or less,
The average particle size of the resin particles is larger than the average particle size of the inorganic particles,
The raised portion includes a convex portion formed by projecting the inorganic particles,
The decorative sheet, wherein the raised portion is provided according to the wood grain pattern displayed by the design layer. a design layer that displays a wood grain design;
comprising the design layer and a laminated ridge layer,
The raised layer includes a raised portion provided in a region overlapping with a partial region of the design layer,
The raised portion contains a binder resin, resin particles and inorganic particles,
The average thickness of the raised portion is 12 μm or more and 60 μm or less,
The average particle size of the resin particles is larger than the average particle size of the inorganic particles,
The raised portion includes a convex portion formed by projecting the inorganic particles,
The wood grain pattern includes a conduit groove region displaying the conduit groove and a non-conduit groove region other than the conduit groove region,
The decorative sheet, wherein the raised portion is provided in a region that overlaps with one of the conduit groove region and the non-conduit groove region. a design layer that displays the design of the floating wooden board;
comprising the design layer and a laminated ridge layer,
The raised layer includes a raised portion provided in a region overlapping with a partial region of the design layer,
The raised portion contains a binder resin, resin particles and inorganic particles,
The average thickness of the raised portion is 12 μm or more and 60 μm or less,
The average particle size of the resin particles is larger than the average particle size of the inorganic particles,
The raised portion includes a convex portion formed by projecting the inorganic particles,
The decorative sheet, wherein the raised portion is provided in a region that overlaps with one of an early wood region and a late wood region included in the floating wooden board. a design layer that displays a wood grain design;
comprising the design layer and a laminated ridge layer,
The raised layer includes a raised portion provided in a region overlapping with a partial region of the design layer,
The raised portion contains a binder resin, resin particles and inorganic particles,
The average thickness of the raised portion is 12 μm or more and 60 μm or less,
The average particle size of the resin particles is larger than the average particle size of the inorganic particles,
The raised portion includes a convex portion formed by projecting the inorganic particles,
The wood grain pattern includes a knot area displaying knots and a non-knot area other than the knot area,
The decorative sheet, wherein the raised portion is provided in a region overlapping with one of the knot region and the non-knot region. The decorative sheet according to any one of claims 1 to 5, wherein the raised portion includes a plurality of raised portions spaced apart from each other. The average particle diameter of the resin particles is larger than the average thickness of the raised portion,
The decorative sheet according to any one of claims 1 to 6, wherein the average particle size of the inorganic particles is larger than half the average thickness of the raised portion. The raised portion includes one convex portion formed by protruding one of the inorganic particles, another convex portion formed by protruding another one of the inorganic particles, and the one a convex portion and a concave portion located between the other one convex portion;
The decorative sheet according to any one of claims 1 to 7, wherein the thickness of the raised portion in at least one of the recessed portions is smaller than the average thickness of the raised portion. The raised portion includes one convex portion formed by protruding one of the inorganic particles, another convex portion formed by protruding another one of the inorganic particles, and the one a convex portion and a concave portion located between the other one convex portion;
9. The thickness of the raised portion in at least one of the concave portions is smaller than the particle size of the one inorganic particle and smaller than the particle size of the other inorganic particle. The cosmetic sheet described in . The raised portion includes one convex portion formed by protruding one of the inorganic particles, another convex portion formed by protruding another one of the inorganic particles, and the one a convex portion and a concave portion located between the other one convex portion;
The decorative sheet according to any one of claims 1 to 9, wherein the thickness of the raised portion in at least one of the recessed portions is smaller than the average particle size of the inorganic particles. The decorative sheet according to any one of claims 1 to 10, wherein at least some of the tops of the inorganic particles are exposed from the binder resin. The decorative sheet according to any one of claims 1 to 11, wherein the resin particles have an average particle size larger than twice the average particle size of the inorganic particles. The decorative sheet according to any one of claims 1 to 12, wherein the average thickness of the raised portion at the position where the resin particles do not exist is 80% or more and 130% or less of the average particle size of the inorganic particles. The average particle diameter of the resin particles is 20 μm or more and 70 μm or less,
The decorative sheet according to any one of claims 1 to 13, wherein the inorganic particles have an average particle size of 5 µm or more and 20 µm or less. The decorative sheet according to any one of claims 1 to 14, wherein the raised portion contains 100 parts by mass of the resin particles and 40 parts by mass or more and 200 parts by mass or less of the inorganic particles. Claims 1 to 1, wherein the following (1) and (2) are satisfied when the region where the thickness of the ridge is more than 6 μm and 20 μm or less is defined as R1, and the region where the thickness of the ridge is more than 20 μm and 55 μm or less is defined as R2. 16. The decorative sheet according to any one of 15.
(1) R1 accounts for 35% or more and 55% or less of the total area of the region where the ridge is provided.
(2) R2 accounts for 20% or more and 40% or less of the total area of the region provided with the raised portion. 17. The decorative sheet according to claim 16, which satisfies the following (3) and (4) when the region where the thickness of the raised portion is 6 μm or less is defined as R0 and the region where the thickness of the raised portion is more than 55 μm is defined as R3. .
(3) R0 accounts for 20% or less of the total area of the region where the raised portion is provided.
(4) R3 accounts for 5% or less of the total area of the region where the raised portion is provided. The decorative sheet according to any one of claims 1 to 16;
and a support member that supports the decorative sheet.

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