JP2023035967A - Decorative sheet, decorative material, and method for producing the same - Google Patents

Abstract

To provide a decorative sheet which has a primer layer sufficiently formed on the surface and is excellent in mat designability.SOLUTION: A decorative sheet has a transparent resin layer and a primer layer in this order on a base material sheet composed of at least a polyolefin-based resin, wherein the surface of the decorative sheet has a ratio (RSm/Rz) of an average length RSm of a coarse curve element to a maximum height Rz, which is measured by a measurement method according to JIS B0601:2013, of 1 or more and less than 40.SELECTED DRAWING: None

Description

TECHNICAL FIELD The present invention relates to a decorative sheet, a decorative material, and a method for producing the same.

2. Description of the Related Art Conventionally, a decorative material having a decorative sheet on an adherend such as a wooden substrate has been used as a flooring material for buildings such as detached houses, condominiums, and apartments. When such a decorative material is actually used, a curable coating such as urethane or acrylic may be formed on the surface of the decorative sheet in order to impart durability, scratch resistance, etc. to the surface of the decorative sheet.

A decorative sheet before forming a coating film for forming a decorative material as described above has been proposed (see Patent Document 1). In the decorative sheet, the primer layer for forming the coating film is a coating film-forming primer layer formed of a specific blend of acrylic-urethane copolymer resin and isocyanate, and improves the coating film adhesion. I am planning.

Although the decorative sheet before the coating film is formed is also an excellent decorative sheet, the formation of the primer layer has not been sufficiently studied. In the process of manufacturing a decorative material, there is a case where a decorative sheet is manufactured before a coating film is formed, temporarily wound up, and transported to another line or shipped. Such decorative sheets may be transported or shipped with a primer layer formed on the outermost surface. work suitability) is required.

In addition, the decorative sheet as described above exhibits a low-gloss feeling, thereby improving the design. Therefore, decorative sheets are required to have excellent matte design.

Accordingly, there is a demand for the development of a decorative sheet that has a sufficient primer layer formed on the surface and that has an excellent matte design.

Japanese Patent No. 5499429

An object of the present invention is to provide a decorative sheet having a sufficient primer layer formed on the surface thereof and having an excellent matte design. Another object of the present invention is to provide a decorative material having a sufficient primer layer formed on the surface thereof and having an excellent matte design. A further object of the present invention is to provide a method for easily producing a decorative sheet having a sufficient primer layer formed on the surface and having an excellent matte design.

As a result of intensive research, the present inventors have found that a decorative sheet having a transparent resin layer and a primer layer in this order on at least a base sheet made of a polyolefin resin, the surface shape of the decorative sheet exhibits specific characteristics. The inventors have found that the above-described object can be achieved by the decorative sheet shown, and have completed the present invention.

That is, the present invention relates to the following decorative sheet, decorative material, and method for producing the same.
1. A decorative sheet having a transparent resin layer and a primer layer in this order on a base sheet made of at least a polyolefin resin,
The surface of the decorative sheet has a ratio (RSm/Rz) of the average length RSm to the maximum height Rz of the roughness curve element, measured by a measurement method conforming to JIS B0601:2013, of 1 or more and less than 40.
A cosmetic sheet characterized by:
2. Item 2. The decorative sheet according to Item 1, wherein the primer layer contains an inorganic filler.
3. Item 3. The decorative sheet according to Item 2, wherein the content of the inorganic filler is 10 to 30 parts by mass with respect to 100 parts by mass of the cured resin component forming the primer layer.
4. Item 4. The decorative sheet according to any one of Items 1 to 3, having an uneven pattern on the surface.
5. A decorative material having an adherend on the surface of the decorative sheet according to any one of Items 1 to 4 opposite to the primer layer.
6. Item 6. The decorative material according to Item 5, which has a grooved portion and/or a chamfered portion on the decorative sheet side.
7. Item 7. The decorative material according to Item 6, wherein the grooved portion and/or the chamfered portion are coated with paint.
8. Item 8. The decorative material according to any one of Items 5 to 7, which has a coating film on the primer layer.
9. Item 9. The decorative material according to Item 8, wherein the coating film is made of an ionizing radiation-curable resin.
10. Item 10. The decorative material according to Item 9, wherein the ionizing radiation-curable resin is an ultraviolet-curable resin.
11. Item 11. The cosmetic material according to any one of Items 8 to 10, wherein the coating film contains at least one selected from the group consisting of an antibacterial agent, an antiviral agent, an antiallergen agent, and an antifungal agent.
12. (1) having a step 1 of manufacturing a decorative material by attaching a decorative sheet to an adherend;
The decorative sheet has a transparent resin layer and a primer layer in this order on a base sheet made of at least a polyolefin resin,
The surface of the decorative sheet has a ratio (RSm/Rz) of the average length RSm to the maximum height Rz of the roughness curve element, measured by a measurement method conforming to JIS B0601:2013, of 1 or more and less than 40.
A method for manufacturing a decorative material characterized by:
13. After step 1, further
(2) step 2 of forming a grooved portion and/or a chamfered portion on the decorative sheet side of the decorative material;
(3) Step 3 of applying paint to the grooved portion and/or the chamfered portion;
(4) Step 4 of scraping off paint from portions other than the grooved portion and/or the chamfered portion
has a
13. The manufacturing method according to Item 12.
14. Item 14. The manufacturing method according to Item 12 or 13, further comprising a coating film forming step of forming a coating film on the decorative sheet side of the decorative material.

The decorative sheet of the present invention has a sufficient primer layer formed on the surface and is excellent in matte design. In addition, since the decorative material of the present invention has an adherend on the surface opposite to the primer layer of the decorative sheet, the primer layer is sufficiently formed on the surface and the matte design is achieved. Are better. Furthermore, in the method for producing the decorative material of the present invention, the decorative sheet of the present invention, which has a sufficiently formed primer layer on the surface and has an excellent matte design property, is used to produce the decorative material. The decorative material of the present invention, which is sufficiently formed on the surface and has an excellent matte design, can be easily produced.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram (sectional view) of the decorative sheet of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram (sectional view) of the decorative material of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram (sectional view) of the decorative material of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram (sectional view) of the decorative material of this invention.

1. Decorative Sheet The decorative sheet of the present invention is a decorative sheet having a transparent resin layer and a primer layer in this order on a base sheet made of at least a polyolefin resin, and the surface of the decorative sheet conforms to JIS B0601:2013. The ratio (RSm/Rz) between the average length RSm and the maximum height Rz of the roughness curvilinear element is 1 or more and less than 40, measured by a measurement method according to . In the decorative sheet of the present invention having the above characteristics, the ratio (RSm/Rz) between the average length RSm and the maximum height Rz of the roughness curvilinear element measured by a surface measurement method conforming to JIS B0601:2013 is specified. , the primer layer is sufficiently formed on the surface and the matte design is excellent.

FIG. 1 is a cross-sectional view showing an example of the decorative sheet of the present invention. The decorative sheet 1 of the present invention illustrated in FIG. 1 has a transparent resin layer 15 and a primer layer 16 in this order on at least a base sheet 12 made of polyolefin resin.

The decorative sheet of the present invention will be described in detail below. In the decorative sheet of the present invention, the surface is the so-called "front surface", and when the decorative sheet of the present invention is used by being laminated on an adherend or the like, it is the surface that comes into contact with the adherend. is the opposite side and is the side that is visible after lamination. Further, in this specification, the direction of the surface of the decorative sheet of the present invention may be called "front" or "upper", and the opposite side thereof may be called "back" or "lower".

The surface of the decorative sheet of the present invention has a ratio of the average length RSm to the maximum height Rz of the roughness curve elements (RSm/Rz) of 1 or more and less than 40, measured by a measurement method conforming to JIS B0601:2013. be. If RSm/Rz is less than 1, the primer layer will not be sufficiently formed. Also, when RSm/Rz is 40 or more, the matte design deteriorates. RSm/Rz is preferably 5 or more, more preferably 10 or more, and even more preferably 15 or more. RSm/Rz is preferably 35 or less, more preferably 30 or less, and even more preferably 25 or less. When the lower limit of RSm/Rz is within the above range, the formation of the primer layer becomes more sufficient, and when the decorative sheet is wound into a roll to form a decorative sheet roll, winding slack is further suppressed. . Further, when the upper limit of RSm/Rz is within the above range, the matte design is further improved, conspicuousness of scratches and stains is further suppressed, and adhesion of wood chips is further suppressed. Since the decorative sheet of the present invention usually has a primer layer as the outermost layer, RSm and Rz on the surface of the decorative sheet may be measured on the surface of the primer layer.

The above RSm and Rz are the average length RSm and the maximum height Rz of the roughness curve element, respectively, measured by the measurement method based on JIS B0601:2013 under the measurement conditions based on JIS B0633:2001.

The RSm is preferably 400 to 1000 μm, more preferably 500 to 900 μm, even more preferably 600 to 800 μm. When the lower limit of RSm is within the above range, the primer layer is more sufficiently formed on the surface of the decorative sheet of the present invention. When the upper limit of RSm is in the above range, the decorative sheet of the present invention has a matte design property that is further improved, conspicuous scratches and stains, and adhesion of wood chips are further suppressed, and the decorative sheet is formed into a roll. When the decorative sheet roll is formed by winding the decorative sheet roll, looseness of winding is further suppressed.

The above Rz is preferably 20 to 400 μm, more preferably 25 to 100 μm, even more preferably 30 to 50 μm. When the lower limit of Rz is within the above range, the matte design of the decorative sheet of the present invention is further improved, conspicuous scratches and stains, and adhesion of wood chips are further suppressed, and the decorative sheet can be formed into a roll. When the decorative sheet roll is formed by winding the decorative sheet roll, looseness of winding is further suppressed. When the upper limit of Rz is within the above range, the primer layer is more sufficiently formed on the surface of the decorative sheet of the present invention.

In this specification, RSm, Rz, and RSm/Rz are values measured by the following measuring methods.

A 5 cm long and 5 cm wide area on the surface of the decorative sheet is arbitrarily selected. Within the above range, arbitrarily select 5 points and measure in the width direction (TD direction) of the decorative sheet under JIS B0633: 2001-compliant measurement conditions (evaluation length is 40 mm), JIS B0601: 2013-compliant. The average length RSm and the maximum height Rz of the roughness curve elements are measured by the measurement method described above, and the average values of the five points are used as the measured values of RSm and Rz. RSm/Rz is then calculated from the measured values of RSm and Rz.

Methods for adjusting RSm, Rz, and RSm/Rz on the surface of the decorative sheet within the above ranges include, for example, (1) a method of embossing the decorative sheet of the present invention from the primer layer side, and (2) In the manufacturing process of the decorative sheet of the present invention, embossing is applied from the transparent resin layer side before forming the primer layer, and adjustment is performed. (4) a method of adjusting by combining the above methods (1) to (3), and the like.

In the above method (1) or (2), the specific method of embossing is not particularly limited, and embossing is performed by pressing an embossing plate against the surface to be embossed, or by using an embossing roll. method, a chill roll embossing method in which embossing is performed using a chill roll whose surface temperature is controlled at a low temperature, and the like.

The surface temperature of the chill roll in the chill roll embossing method is not particularly limited, and is preferably 20 to 60°C, more preferably 30 to 50°C.

The decorative sheet of the present invention has a transparent resin layer and a primer layer in this order on at least a base sheet made of a polyolefin resin, and the surface RSm/Rz of the decorative sheet is 1 or more and less than 40. , the specific layer structure is not limited. For example, as shown in FIG. 1, there is a decorative sheet having a back primer layer 11, a base sheet 12, a pattern layer 13, a transparent adhesive layer 14, a transparent resin layer 15, and a primer layer 16 in this order from the bottom. mentioned. Each layer will be specifically described below, taking the decorative sheet having such a layer structure as a typical example.

Base Sheet As the base sheet, a sheet made of polyolefin resin is used. Normally, a film made of polyolefin resin may be used.

The polyolefin resin is not particularly limited, and those commonly used in the field of decorative sheets can be used. For example, polyethylene, polypropylene, polybutene, polymethylpentene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-propylene-butene copolymer, polyolefin thermoplastic elastomer, etc. is mentioned. Among these, polypropylene, polyolefin-based thermoplastic elastomer, and the like are particularly preferable.

Polypropylene-based homopolymers or copolymers are also preferred, and examples thereof include homopolypropylene resins, random polypropylene resins, and block polypropylene resins.

In addition, propylene-α-olefin copolymers containing 15 mol % or more of comonomers of ethylene, butene-1, 4-methylpentene-1, hexene-1 or octene-1 are also preferred.

A polyolefin-based thermoplastic elastomer is a block polymer using isotactic polypropylene for the hard segment and atactic polypropylene for the soft segment. Particularly preferred is a mixture of a hard segment made of isotactic polypropylene and a soft segment made of atactic polypropylene at a weight ratio of 80:20.

The polyolefin resin may be formed into a film by, for example, a calendering method, an inflation method, a T-die extrusion method, or the like.

The thickness of the base sheet is not particularly limited and can be set depending on the product properties, but is usually 40 to 150 μm, preferably about 50 to 100 μm.

Additives may be added to the base sheet, if necessary. Examples of additives include fillers such as calcium carbonate and clay, flame retardants such as magnesium hydroxide, antioxidants, lubricants, foaming agents, and colorants (see below). The blending amount of the additive can be appropriately set according to the product characteristics.

The coloring agent is not particularly limited, and known coloring agents such as pigments and dyes can be used. For example, inorganic pigments such as titanium white, zinc white, rouge, vermillion, ultramarine blue, cobalt blue, titanium yellow, yellow lead, carbon black; isoindolinone, Hansa Yellow A, quinacridone, permanent red 4R, phthalocyanine blue, indanthrene Organic pigments (including dyes) such as blue RS and aniline black; metal pigments such as aluminum and brass; pearlescent (pearl) pigments made of foil powder such as titanium dioxide-coated mica and basic lead carbonate; The coloring mode of the base sheet includes transparent coloring and opaque coloring (concealing coloring), and these can be arbitrarily selected. For example, when the base color of the adherend (base material to which the decorative sheet is adhered) is to be hidden by coloring, opaque coloring may be selected. On the other hand, if the background pattern of the adherend is to be visible, transparent coloring may be selected.

One side or both sides of the base sheet may be subjected to surface treatment such as corona discharge treatment, ozone treatment, plasma treatment, ionizing radiation treatment, dichromic acid treatment, etc., if necessary. For example, when corona discharge treatment is performed, the surface tension of the substrate sheet surface should be 3×10 ⁻⁴ N or more, preferably 4×10 ⁻⁴ N or more. The surface treatment may be carried out according to a conventional method for each treatment.

A back surface primer layer may be provided on the back surface of the base sheet (surface to which the adherend is adhered) to facilitate adhesion of the adherend. In addition, a printing primer layer may be provided on the upper surface of the base material sheet (the surface opposite to the surface on which the adherend is adhered) to facilitate the formation of the pattern layer.

The back primer layer and the printing primer layer can be formed by applying a known primer agent to one side or both sides of the base sheet. As the primer agent, one obtained by dispersing a resin component in a solvent can be used. Examples of the resin component include acrylic-urethane resins and urethane-cellulose resins (for example, resins obtained by adding hexamethylene diisocyanate to a mixture of urethane and nitrocellulose).

The back surface primer layer may contain additives as necessary. Examples of additives include inorganic fillers such as silica, fillers such as calcium carbonate and clay, flame retardants such as magnesium hydroxide, antioxidants, lubricants, foaming agents, ultraviolet absorbers, light stabilizers, and deodorants. , antibacterial agents, antiviral agents, antiallergen agents, antifungal agents, and the like. The blending amount of the additive can be appropriately set according to the product characteristics.

The above antiviral agents can be generally classified into organic antiviral agents and inorganic antiviral agents. The antiviral agent may contain at least one of these, and may be used in combination.

Examples of organic antiviral agents include quaternary ammonium salt, quaternary phosphonium salt, pyridine, pyrithione, benzimidazole, organic iodine, isothiazoline, and anionic antiviral agents. As the inorganic antiviral agent, zeolite, apatite, zirconia, glass, molybdenum oxide, or the like supporting metal ions such as silver, copper, and zinc can be used.

Among the above organic antiviral agents, benzimidazole antiviral agents or anionic antiviral agents that maintain the particle shape are particularly preferably used. Retaining the particle shape means that it exists in the form of particles without dissolving in the composition for forming the back primer layer (primer agent before curing). Therefore, in the process of forming the back primer layer, the particles of the imidazole compound or the particles of the anionic compound can be easily unevenly distributed on the back surface (the surface opposite to the base sheet). Addition of an antiviral agent necessary to obtain a predetermined antiviral property by unevenly distributing imidazole compound particles or anionic compound particles on the back surface of the back primer layer (the surface opposite to the base sheet). Since the amount can be suppressed, the antiviral properties are further improved, and deterioration of the surface performance such as the adhesiveness of the back primer layer can be easily suppressed.

The anionic antiviral agent preferably contains, for example, a styrene polymer derivative compound and/or a carboxylic acid derivative compound, and more preferably contains a styrene polymer derivative compound and a carboxylic acid derivative compound. In addition, the styrene polymer derivative compound and/or carboxylic acid derivative compound preferably contains at least one structure among structures of styrene, sodium sulfonate, acrylic acid, maleic acid, and fumaric acid, and includes all structures. is more preferred. In general, enveloped viruses can be inactivated relatively easily by destroying the envelope (lipid layer). Of these, if styrene resin alone is contained, sufficient antiviral properties can be exhibited.

On the other hand, when using an anionic antiviral agent against a non-enveloped virus whose activity is difficult to inhibit, if a styrene polymer derivative compound and/or a styrene resin is used, it may be necessary to increase the amount added. Surface properties such as adhesiveness of the back primer layer may deteriorate. Therefore, in order to exhibit a sufficient activity-inhibiting effect against non-enveloped viruses, it is preferable to use the carboxylic acid derivative compound in combination. The above carboxylic acid derivative compounds preferably include triethylamine, N,N-dimethylallylamine, dimethylpyrrole, tetramethyl-1,3-propanediamine, and N,N,2,2-tetramethyl-1,3-propanediamine. preferable.

The compounds exemplified as the above anionic antiviral agents may be used alone or in combination of two or more, depending on the purpose and application.

When using the anionic antiviral agent, the back primer layer may contain an inorganic filler such as silica. By containing an inorganic filler in the back primer layer, the blocking resistance of the decorative sheet of the present invention is further improved. As the inorganic filler, hydrophobic fine particles such as hydrophobized silica are preferably used. By using hydrophobic fine particles as the inorganic filler, binding between the anionic antiviral agent and silica is suppressed, and deactivation of the anionic antiviral agent is further suppressed.

As the hydrophobized silica, it is possible to use hydrophobized hydrophilic silica produced by a known method. Untreated silica produced by a known method is usually hydrophilic silica, and hydrophobic silica is obtained by subjecting the hydrophilic silica to a hydrophobizing treatment to make it hydrophobic. A method for hydrophobizing untreated silica (hydrophilic silica) is not particularly limited, and a known method can be used.

As the inorganic antiviral agent, a silver-based antiviral agent is preferable from the viewpoint of being nontoxic to the body and excellent in safety. Among them, antiviral performance can be expressed even in a small amount, so the amount added can be suppressed. , phosphate-based glass silver-supported compounds, silver zeolite compounds, and molybdenum oxide silver double salt compounds are more preferable.

The coating amount of the primer agent is not particularly limited, but is usually about 0.1 to 100 g/m ² , preferably about 0.1 to 50 g/m ² .

Although the thicknesses of the back primer layer and the printing primer layer after drying are not particularly limited, they are usually about 0.01 to 10 μm, preferably about 0.1 to 1 μm.

A pattern layer may be formed on the pattern layer base sheet.

The pattern layer imparts a desired design to the decorative sheet, and the type of pattern is not particularly limited. Examples include wood grain patterns, stone grain patterns, grain patterns, tiling patterns, brickwork patterns, texture patterns, leather striped patterns, geometric figures, characters, symbols, abstract patterns, and the like.

The method of forming the pattern layer is not particularly limited. For example, a coloring ink or coating obtained by dissolving (or dispersing) a known coloring agent (dye or pigment) together with a binder resin in a solvent (or dispersion medium). It may be formed by a printing method using an agent or the like.

Examples of coloring agents include inorganic pigments such as carbon black, titanium white, zinc oxide, red iron oxide, Prussian blue, and cadmium red; azo pigments, lake pigments, anthraquinone pigments, quinacridone pigments, phthalocyanine pigments, isoindolinone pigments, dioxazine pigments. metal powder pigments such as aluminum powder and bronze powder; pearlescent pigments such as titanium oxide-coated mica and bismuth oxide chloride; fluorescent pigments; These colorants can be used alone or in combination of two or more. These colorants may further contain fillers such as silica, extenders such as organic beads, neutralizers, surfactants, and the like.

Examples of binder resins include acrylic resins, styrene resins, polyester resins, urethane resins, acrylic-urethane resins, chlorinated polyolefin resins, vinyl chloride-vinyl acetate copolymer resins, and polyvinyl butyral resins. , alkyd-based resins, petroleum-based resins, ketone resins, epoxy-based resins, melamine-based resins, fluorine-based resins, silicone-based resins, cellulose derivatives, rubber-based resins, and the like. These resins can be used alone or in combination of two or more.

Examples of the solvent (or dispersion medium) include petroleum-based organic solvents such as hexane, heptane, octane, toluene, xylene, ethylbenzene, cyclohexane, and methylcyclohexane; - Ester-based organic solvents such as ethoxyethyl; Alcohol-based organic solvents such as methyl alcohol, ethyl alcohol, normal propyl alcohol, isopropyl alcohol, isobutyl alcohol, ethylene glycol, and propylene glycol; Ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone organic solvents; ether organic solvents such as diethyl ether, dioxane and tetrahydrofuran; chlorine organic solvents such as dichloromethane, carbon tetrachloride, trichlorethylene and tetrachlorethylene; and inorganic solvents such as water. These solvents (or dispersion media) can be used alone or in combination of two or more.

The printing method used for forming the pattern layer includes, for example, gravure printing, offset printing, screen printing, flexographic printing, electrostatic printing, inkjet printing, and the like. Further, in the case of forming a solid picture pattern layer on the entire surface, for example, roll coating, knife coating, air knife coating, die coating, lip coating, comma coating, kiss coating, flow coating, dipping, etc. Various coating methods such as a coating method can be used. In addition, a hand-drawn method, a suminagashi method, a photographic method, a transfer method, a laser beam drawing method, an electron beam drawing method, a partial vapor deposition method of a metal or the like, an etching method, or the like may be used, or may be used in combination with other forming methods. good.

The thickness of the pattern layer is not particularly limited, and can be appropriately set according to the characteristics of the product.

If necessary, a colored masking layer may be further formed between the colored masking layer base sheet and the pattern layer. The colored concealing layer is provided when it is desired to conceal the ground color of the adherend from the front surface of the decorative sheet. Not only when the base sheet is transparent, but also when the base sheet is colored for concealment, it may be formed in order to stabilize the concealability.

As the ink for forming the colored concealing layer, an ink capable of forming the pattern layer and capable of concealing coloring can be used.

The method of forming the colored masking layer is preferably a method that can cover the entire substrate sheet (the entire surface is solid). For example, the above roll coating method, knife coating method, air knife coating method, die coating method, lip coating method, comma coating method, kiss coating method, flow coating method, dip coating method and the like are preferred.

The thickness of the colored masking layer is not particularly limited, and can be appropriately set according to the product characteristics.

Transparent Adhesive Layer A transparent adhesive layer may be formed on the pattern layer. The transparent adhesive layer is not particularly limited as long as it is transparent, and includes colorless and transparent, colored and translucent, and the like. This adhesive layer is formed to bond the picture pattern layer and the transparent polypropylene resin layer.

The adhesive is not particularly limited, and adhesives known in the field of decorative sheets can be used.

Examples of adhesives known in the field of decorative sheets include thermoplastic resins such as polyamide resins, acrylic resins and vinyl acetate resins, and curable resins such as thermosetting urethane resins. In addition, a two-component curing type polyurethane resin or polyester resin using isocyanate as a curing agent can also be applied.

The adhesive layer can be formed, for example, by applying an adhesive onto the picture pattern layer and then drying and curing the adhesive. Conditions such as drying temperature and drying time are not particularly limited, and may be appropriately set according to the type of adhesive. The method of applying the adhesive is not particularly limited. method can be adopted.

The thickness of the adhesive layer is not particularly limited, but the thickness after drying is about 0.1 to 30 μm, preferably about 1 to 20 μm.

Transparent Resin Layer A transparent resin layer is formed on the transparent adhesive layer. The transparent resin layer includes any of colorless and transparent, colored and translucent, etc., as long as it is transparent.

Although the resin component contained in the transparent resin layer is not limited, it is preferably a thermoplastic resin, particularly preferably polypropylene, and more preferably homopolypropylene. It is preferable that the transparent resin layer is substantially formed of the polypropylene-based resin.

Additives such as fillers, flame retardants, lubricants, antioxidants, and light stabilizers (ultraviolet absorbers, radical scavengers, etc.) can be added to the transparent resin layer, if necessary. In particular, addition of a light stabilizer is preferable in order to improve weather resistance.

Examples of the UV absorber include organic UV absorbers such as triazine-based, benzotriazole-based, benzophenone-based, and salicylic acid ester-based UV absorbers. In addition, inorganic UV absorbers such as fine particles of zinc oxide, cerium oxide, and titanium oxide having a particle size of 0.2 μm or less can also be used.

Examples of radical scavengers include hindered amine radical scavengers such as bis-(2,2,6,6-tetramethyl-4-piperidinyl) sebacate and radical scavengers such as piperidine radical scavengers. The transparent resin layer is formed by, for example, using a calendar method, an inflation method, a T-die extrusion method, or the like. Alternatively, a ready-made film may be used.

The thickness of the transparent resin layer is usually about 20-300 μm.

On the transparent resin layer, if necessary, an uneven pattern may be formed by embossing, and a primer layer, which will be described later, may be formed. Forming an uneven pattern on the transparent resin layer makes it easier to adjust RSm, Rz, and RSm/Rz on the surface of the decorative sheet of the present invention within the ranges described above, and a primer is applied to the surface of the decorative sheet of the present invention. Layers are formed more sufficiently, and the matte design of the decorative sheet of the present invention is further improved.

Primer Layer A primer layer (primer layer for coating film formation) is formed on the transparent resin layer.

The primer layer can be formed by coating the surface of the transparent resin layer with a primer layer-forming resin composition containing known resin components used for the primer layer. Examples of resin components include acrylic-urethane copolymer resins, urethane resin-based primers made of acrylic-modified urethane resins (acrylic urethane-based resins), urethane-cellulose-based resins (for example, mixtures of urethane and nitrocellulose and hexagonal Examples include a primer made of a resin obtained by adding methylene diisocyanate, a resin-based primer made of a block copolymer of acrylic and urethane, and the like.

The copolymerization ratio of the acrylic component in the acrylic-urethane copolymer resin is preferably 65% or less, more preferably 20 to 65%, and even more preferably 20 to 40%. When the upper limit of the copolymerization ratio of the acrylic component is within the above range, the coating film adhesion of the decorative sheet is further improved. By setting the lower limit of the copolymerization ratio of the acrylic component within the above range, it is possible to impart even better weather resistance to the decorative material.

The primer layer may contain additives as needed. Examples of additives include inorganic fillers such as silica, fillers such as calcium carbonate and clay, flame retardants such as magnesium hydroxide, antioxidants, lubricants, foaming agents, ultraviolet absorbers, light stabilizers, and deodorants. , antibacterial agents, antiviral agents, antiallergen agents, antifungal agents, and the like. The blending amount of the additive can be appropriately set according to the product characteristics.

Silica is preferred as the inorganic filler. By containing silica in the primer layer, RSm, Rz, and RSm/Rz on the surface of the decorative sheet of the present invention can be easily adjusted within the above ranges, and the coating film adhesion and blocking resistance of the decorative sheet of the present invention can be improved. , and the scraping property is further improved.

Powdered inorganic fillers are generally used. In this case, the average particle size of the inorganic filler is not particularly limited, but is preferably 1 to 5 μm, more preferably 1 to 3 μm.

The content of the inorganic filler is preferably 5 to 35 parts by mass, preferably 10 to 30 parts by mass, more preferably 15 to 25 parts by mass with respect to 100 parts by mass of the cured resin component forming the primer layer. The primer layer has high coating adhesion. Since the decorative sheet of the present invention has such a primer layer on the outermost surface, it tends to cause blocking when wound into a roll. In the decorative sheet of the present invention, blocking can be more effectively suppressed by setting the lower limit of the content of the inorganic filler within the above range.

Moreover, when an inorganic filler is contained, if the content is too large, there is a risk of causing deterioration in adhesion over time between the primer layer and the coating film. In particular, the adhesion of the coating film tends to decrease in a high-temperature and high-humidity atmosphere. In the decorative sheet of the present invention, by setting the upper limit of the content of the inorganic filler within the above range, it is possible to more effectively suppress the deterioration of the adhesion of the coating film in a high-temperature and high-humidity atmosphere.

As the antiviral agent, the same antiviral agent as that used for the back primer layer can be used. When a silver-based antiviral agent is added to the primer layer as the inorganic antiviral agent described above, there is a possibility of discoloration depending on the resin forming the primer layer. For example, the primer layer-forming resin composition containing a silver-based antiviral agent may be discolored by heat or light before curing, or may be discolored by heat or light after the primer layer is formed. In this case, discoloration can be suppressed by adding an ultraviolet inhibitor, a light stabilizer, or the like as appropriate. For example, when a silver molybdenum oxide double salt compound is used as an inorganic antiviral agent, discoloration of the primer layer can be suppressed by using a benzotriazole compound together.

The primer layer may be formed by a known coating method such as roll coating. In this case, prior to the formation of the primer layer, the formation surface, that is, the surface of the transparent resin layer, may be appropriately subjected to a surface adhesion treatment such as corona discharge treatment, plasma treatment, ozone treatment, or the like, if necessary.

An uneven pattern may be formed on the primer layer by embossing, if necessary. Forming an uneven pattern on the primer layer makes it easier to adjust RSm, Rz, and RSm/Rz on the surface of the decorative sheet of the present invention within the ranges described above, and the primer layer is formed on the surface of the decorative sheet of the present invention. The matte design of the decorative sheet of the present invention is further improved by being formed more sufficiently.

2. Decorative Material The decorative material of the present invention is a decorative material having an adherend on the surface of the decorative sheet opposite to the primer layer. The above-described decorative sheet of the present invention can be made into a decorative material by bonding it to various adherends.

FIG. 2 is a schematic diagram showing an example of the cosmetic material of the present invention. In FIG. 2, the decorative material 2 of the present invention is formed by laminating the decorative sheet 1 on an adherend 21 with an adhesive layer 22 interposed therebetween.

The material of the adherend is not particularly limited, and examples thereof include inorganic non-metallic, metallic, woody, and plastic materials.

Specifically, inorganic non-metallic cement, for example, paper cement, extruded cement, slag cement, ALC (light cellular concrete), GRC (glass fiber reinforced concrete), pulp cement, wood chip cement, asbestos cement, calcium silicate, Examples include non-ceramic ceramic materials such as gypsum and gypsum slag, and ceramic materials such as earthenware, earthenware, porcelain, setware, glass, and enamel.

Metal-based materials include, for example, metal materials (metal steel sheets) such as iron, aluminum, and copper.

Wood-based materials include, for example, veneers, plywood, particle boards, fiberboards, laminated lumber, and the like made of cedar, cypress, oak, lauan, teak, and the like.

Examples of plastic materials include resin materials such as polypropylene, ABS resin, and phenol resin.

The shape of such an adherend is not particularly limited, and generally a flat plate may be used in consideration of installation on a flooring or the like.

After bonding to the adherend, for example, depending on the characteristics of the final product, it may be subjected to tongue processing using a cutting, router, tenoner, or the like. In addition, as shown in FIG. 3, the decorative material of the present invention may have grooved portions 23, which are V-shaped grooves, on the decorative sheet side, or chamfering of the four sides of the decorative sheet side. , a chamfered portion 24 may be formed at the end portion on the decorative sheet side. In addition, the decorative material of the present invention may be provided with a paint for imparting design properties to the above-described grooved portions and chamfered portions.

Coating film The decorative material of the present invention may have a coating film on the primer layer of the decorative sheet.

FIG. 4 shows an example of the decorative material of the present invention having a coating film formed thereon. In FIG. 4, the decorative material 2 of the present invention has grooved portions 23 which are V-shaped grooves or the like on the decorative sheet 1 side, and the grooved portions 23 are provided with paint 25 . In addition, a chamfered portion 24 is provided at the end on the decorative sheet 1 side, and paint 26 is provided on the chamfered portion 24 . In FIG. 4, the decorative material of the present invention has a coating film 27 formed on the primer layer of the decorative sheet 1, and the surface of the decorative material is covered with the coating film 27. As shown in FIG.

Various coating films can be formed on the primer layer of the decorative sheet that constitutes the decorative material. As the resin component constituting the coating film, for example, epoxy-based resin, urethane-based resin, acrylic-based resin, ester-based resin, curable resin such as unsaturated polyester-based resin, or one or more of these. Mixed resin etc. are mentioned.

The coating film can be formed of one layer or two or more layers.

The coating film may contain additives as necessary. Additives include, for example, inorganic fillers such as silica, flame retardants such as magnesium hydroxide, antioxidants, lubricants, foaming agents, ultraviolet absorbers, light stabilizers, deodorants, antibacterial agents, antiviral agents, and antibacterial agents. Examples include allergen agents and antifungal agents. The blending amount of the additive can be appropriately set according to the product characteristics. Among these additives, the coating film preferably contains at least one selected from the group consisting of antibacterial agents, antiviral agents, antiallergen agents, and antifungal agents. Content of at least one selected from the group consisting of the antibacterial agent, antiviral agent, antiallergen agent, and antifungal agent (content of antibacterial agent, antiviral agent, antiallergen agent, and antifungal agent is not particularly limited, and is preferably 0.1 to 10 parts by mass based on 100% by mass of the coating film, but can be appropriately adjusted according to the type of each additive.

The coating film preferably contains an antiviral agent. By including an antiviral agent in the coating film, antiviral properties can be imparted to the decorative sheet or the decorative sheet used for the decorative material. When the coating film is formed with a layer structure of two or more layers, the outermost layer preferably contains an antiviral agent from the viewpoint of exhibiting more antiviral properties.

As the antiviral agent, the same antiviral agent as that used for the back primer layer can be used. When a silver-based antiviral agent is added to a coating film (surface protective layer) as the inorganic antiviral agent described above, there is a possibility of discoloration depending on the resin forming the surface protective layer. For example, a composition containing a silver-based antiviral agent may be discolored by heat or light before curing, or may be discolored by heat or light after the surface protective layer is formed. In this case, discoloration can be suppressed by adding an ultraviolet inhibitor, a light stabilizer, or the like as appropriate. For example, when a silver molybdenum oxide double salt compound is used as an inorganic antiviral agent, discoloration of the surface protective layer can be suppressed by using a benzotriazole compound together.

In addition, among the above-mentioned organic antiviral agents used in coating films, benzimidazole antiviral agents or anionic antiviral agents that maintain the particle shape are particularly preferably used. Retaining the particle shape means that it exists in the form of particles without dissolving in the composition before curing for forming the surface protective layer. Therefore, in the process of forming the surface protective layer, the particles of the imidazole compound or the particles of the anionic compound tend to float in the composition, and the particles of the imidazole compound or the anionic compound are formed on the outermost surface side of the surface protective layer. particles can be easily unevenly distributed. By unevenly distributing the particles of the imidazole compound or the particles of the anionic compound on the outermost surface side of the surface protective layer, it is possible to suppress the addition amount of the antiviral agent necessary to obtain a predetermined antiviral property. Antiviral properties are further improved, and deterioration of surface performance such as scratch resistance of the surface protective layer is easily suppressed.

The content of the antiviral agent is not particularly limited, and may be about 0.1 to 10% by mass based on 100% by mass of the coating film.

As the coating film, a transparent surface protective layer formed by using an ionizing radiation-curable resin is particularly preferable. By forming a transparent surface protective layer using an ionizing radiation-curable resin, it is possible to obtain a decorative material that is more excellent in scratch resistance, weather resistance, and the like. In particular, the decorative sheet and decorative material of the present invention are excellent in that high adhesion can be ensured even when an ionizing radiation-curable resin, which is difficult to ensure adhesion, is used as a coating film.

Hereinafter, a transparent surface protective layer will be specifically described as a representative example of the coating film that can be formed on the primer layer of the decorative sheet and decorative material of the present invention.

The ionizing radiation-curable resin is not limited as long as it is a resin that undergoes a cross-linking polymerization reaction when irradiated with ionizing radiation and changes into a three-dimensional polymer structure. As the ionizing radiation curable resin, an electron beam curable resin and an ultraviolet ray curable resin are preferable.

Ionizing radiation includes visible light, ultraviolet rays (near ultraviolet rays, vacuum ultraviolet rays, etc.), X-rays, electron beams, ion beams, etc. Among these, ultraviolet rays and electron beams are preferable.

Ultra-high pressure mercury lamps, high pressure mercury lamps, low pressure mercury lamps, carbon arc lamps, black light fluorescent lamps, and metal halide lamps can be used as ultraviolet light sources. The wavelength of ultraviolet rays is about 190 nm or more and 380 nm or less.

As the electron beam source, for example, various electron beam accelerators such as Cockcroftwald type, Vandegraft type, resonance transformer type, insulating core transformer type, linear type, dynamitron type, and high frequency type can be used. The energy of the electron beam is preferably about 1.6×10 ⁻¹⁷ J or more and 1.6×10 ⁻¹⁶ J or less, more preferably about 1.6×10 ⁻¹⁷ J or more and 4.8×10 ⁻¹⁷ J or less. preferable. It is preferable that the dose of the electron beam is about 2 Mrad or more and 15 Mrad or less.

As the ionizing radiation curable resin, a known one or a commercially available product (coating for decorative sheet, hard coat film, veneer or wood flooring, etc.) can be used. Specifically, a composition containing at least one of prepolymers, oligomers and monomers having polymerizable unsaturated bonds or epoxy groups in the molecule is used.

Examples of the prepolymer or oligomer include methacrylates such as polyester methacrylate, polyether methacrylate, polyol methacrylate and melamine methacrylate; urethane acrylates such as urethane acrylate, urethane dimethyl acrylate and urethane trimethyl acrylate; Examples include acrylates such as acrylates, polyether acrylates, polyol acrylates, and melamine acrylates.

Examples of monomers include styrene-based monomers such as styrene and α-methylstyrene; acrylic acids such as methyl acrylate, 2-ethylhexyl acrylate, methoxyethyl acrylate, butoxyethyl acrylate, butyl acrylate, and phenyl acrylate. Esters; methacrylic acid esters such as methyl methacrylate, ethyl methacrylate, propyl methacrylate, ethoxymethyl methacrylate, phenyl methacrylate, and lauryl methacrylate.

Substituted aminoalcohol esters of unsaturated acids include 2-(N,N-diethylamino)ethyl acrylate, 2-(N,N-diethylamino)ethyl methacrylate, 2-(N,N- dibenzylamino)methyl, 2-(N,N-diethylamino)propyl acrylate and the like.

In addition, unsaturated carboxylic acid amides such as acrylamide and methacrylamide; monofunctional compounds such as ethyl carbitol acrylate and ethylene glycol acrylate; ethylene glycol diacrylate, propylene glycol diacrylate, neobenzyl glycol diacrylate, 1,6-hexane Polyfunctional compounds such as diol diacrylate, diethylene glycol diacrylate, triethylene glycol diacrylate, dipropylene glycol diacrylate, diethylene glycol dimethacrylate, polyethylene glycol diacrylate; trimethylolpropane trithioglycolate, trimethylolpropane trithiopropane Polythiol compounds having two or more thiol groups in the molecule, such as pyolate and dipentaerythritol tetrathioglycol; trimethylolpropane triacrylate, pentaerythritol hexaacrylate, dipentaerythritol hexamethacrylate, etc. having three or more functional groups. There are acrylate monomers.

The method for forming a transparent surface protective layer using an ionizing radiation-curable resin is not limited, but for example, it can be formed by irradiating a coating film of a composition (paint) containing an ionizing radiation-curable resin with ionizing radiation. The ionizing radiation may be any radiation that has energy capable of acting on the ionizing radiation curable resin contained in the paint and the photoradical polymerization initiator/sensitizer used as additives to initiate the radical polymerization reaction. , γ-rays, and other electromagnetic waves. Among these, the electron beam is the most practical in view of the curing ability of the coating film and the simplicity of the irradiation apparatus. In the case of electron beam irradiation, for example, electron beam irradiation may be performed under the conditions of 2.8×10 ⁻¹⁷ J and 5 Mrad (50 kGy) to crosslink and cure the film.

Although the thickness of the transparent surface protective layer is not limited, it is generally desirable to have a solid content of 5 to 150 g/m ² , particularly 15 to 60 μm.

The transparent surface protective layer of the obtained decorative material may have surface irregularities. The unevenness of the surface is caused by the unevenness of the adherend (for example, the wooden base material) itself, uneven coating of the adhesive, and the like. In this case, it is preferable to polish the surface of the transparent surface protective layer. This makes it possible to suitably obtain a decorative material having a transparent surface protective layer with a smooth surface. Further, one or more transparent surface protective layers may be provided on the transparent surface protective layer whose surface is polished. Further, one or more layers of the transparent surface protective layer may be further provided by polishing the surface of the further provided transparent surface protective layer.

3. Method for producing decorative material The method for producing the decorative material of the present invention comprises:
(1) having a step 1 of manufacturing a decorative material by attaching a decorative sheet to an adherend;
The decorative sheet has a transparent resin layer and a primer layer in this order on a base sheet made of at least a polyolefin resin,
The surface of the decorative sheet has a ratio of the average length RSm to the maximum height Rz of the roughness curve element (RSm/Rz) of 1 or more and less than 40, measured by a measurement method conforming to JIS B0601:2013. The method.

The manufacturing method of the present invention having the above-described configuration makes it possible to easily manufacture a decorative material having a sufficient primer layer formed on the surface and having an excellent matte design.

(Step 1)
Step 1 is a step of sticking a decorative sheet onto an adherend to manufacture a decorative material. As the decorative sheet and adherend, those described in the decorative sheet and decorative material of the present invention may be used.

The attachment method for attaching the decorative sheet to the adherend is not particularly limited, and examples thereof include a method of attaching via a known adhesive layer. Alternatively, the back primer layer of the decorative sheet may be brought into contact with the adherend, and the decorative sheet may be adhered directly onto the adherend.

Through step 1 described above, the decorative sheet is adhered onto the adherend to manufacture the decorative material.

(Step 2)
The method for producing a decorative material of the present invention may further include (2) Step 2, after Step 1, of forming grooves and/or chamfers on the decorative sheet side of the decorative material.

The method of forming the grooved portion and the chamfered portion is not particularly limited. For example, according to the characteristics of the final product, the grooved portion is formed by providing a V-shaped groove using a tenoner, and the four sides are chamfered. A method of forming a chamfered portion is mentioned.

The depth of the grooved portion is not particularly limited, and is preferably 0.1 to 1.0 mm, more preferably 0.1 to 0.5 mm.

Through step 2 described above, grooved portions and/or chamfered portions are formed on the decorative sheet side of the decorative material.

(Step 3)
The method for manufacturing a decorative material according to the present invention may include, after step 2, step 3 of (3) applying paint to the grooved portion and/or the chamfered portion.

The paint is not particularly limited, and conventionally known paints may be applied. Examples of such paints include colored inks and coating agents used for the pattern layer of the decorative sheet.

Examples of the coating method include a roll coating method using a roller, a die coating method, and the like. In step 3, the paint may be applied not only to the grooved and/or chamfered portions formed in step 2, but also to the grooved and/or chamfered portions of the decorative material. Alternatively, the paint may be applied to the entire surface of the decorative material from the primer layer side of the decorative material that has undergone step 2. The paint adhering to portions other than the grooved portion and/or the chamfered portion may be scraped off in step 4 described below.

In step 3, the amount of coating applied to the surface of the decorative material is not particularly limited, and is about 50 to 150 g/m ² , and the thickness of the coating is about 50 to 150 μm. In the grooved portion, as shown in FIG. 4, the grooved portion 23 may be filled with paint 25 .

Through Step 3 described above, the paint is applied to the grooved portion and/or the chamfered portion.

(Step 4)
The method for producing a decorative material of the present invention may include (4) step 4 of scraping off the paint from portions other than the grooved portion and/or the chamfered portion after step 3 above.

The method of scraping off the paint is not particularly limited, and examples thereof include a method of scraping the surface of the decorative material on which grooved portions and/or chamfered portions are formed using a roller, a squeegee, etc., a method of scraping with a suction nozzle, and the like. be done.

In the decorative material of the present invention, as shown in FIG. 3, the surfaces of the grooved portion 23 and the chamfered portion 24 are positioned lower than the surface of the decorative material. For this reason, in order to scrape off the paint from the portion other than the grooved portion and/or the chamfered portion in step 4, it is necessary to scrape off the paint along the surface of the decorative material on which the grooved portion and/or the chamfered portion are formed. good. As a result, the paint 25 in the grooved portion 23 and the paint 26 applied to the chamfered portion 24 remain as shown in FIG. can take.

Through Step 4 described above, the paint on the portions other than the grooved portion and/or the chamfered portion is scraped off.

(Coating film forming step)
The method for manufacturing the decorative material of the present invention may further include a coating film forming step of forming a coating film on the decorative sheet side of the decorative material. Since the manufacturing method of the present invention includes the coating film forming step, a coating film 27 is formed on the decorative sheet 1 side of the decorative material 2 as shown in FIG. In FIG. 4, the decorative material 2 of the present invention has a grooved portion 23, which is a V-shaped groove, on the side of the decorative sheet 1, and the grooved portion 23 is filled with paint 25. there is Moreover, it has a chamfered portion 24 at the end on the decorative sheet 1 side, and a paint 26 is applied on the chamfered portion 24 . In FIG. 4, the manufacturing method of the present invention includes step 5, so that the paint 25 applied to the grooved portion 23 and the paint 26 on the chamfered portion 24 are covered with the paint film 27 and sealed. .

The coating film forming step may be performed after step 1, after step 2, or after steps 3 and 4. When the coating film forming step is performed after steps 3 and 4, the decorative material shown in FIG. 4 is obtained.

The method of forming the coating film is not particularly limited, and the resin composition containing the resin component and the like described as the coating film constituting the above-described decorative material is applied to the decorative sheet side of the decorative material, and the above-described decorative material is applied. It may be formed by curing the constituent coating film by a method for curing.

Through step 5 described above, a coating film is formed on the decorative sheet side of the decorative material.

EXAMPLES Examples and comparative examples are shown below to describe the present invention more specifically. However, the present invention is not limited to the examples.

Example 1
(Production of decorative sheet)
A back surface primer layer (thickness: 2 μm) of urethane-cellulose resin was formed on the back surface of a base sheet made of a colored polyolefin film with a thickness of 60 μm. Further, a picture pattern layer was formed on the surface of the base material sheet by gravure printing so as to have a thickness of 2 μm using an acrylic-urethane resin. A transparent adhesive layer is formed on the pattern layer using urethane resin to a thickness of 3 μm, and a transparent olefin resin is further laminated by a hot melt extrusion method to a thickness of 80 μm. A flexible resin layer was formed. The transparent resin layer has a maleic acid-modified PP layer (layer thickness: 10 μm) on the transparent adhesive layer side, and a random PP layer (layer thickness: 70 μm) is laminated on the maleic acid-modified PP layer. It has a layered structure.

An uneven pattern was formed by embossing from above the transparent resin layer. Then, the surface of the decorative sheet was subjected to corona discharge treatment. Next, on the transparent resin layer, a resin composition for forming a primer layer, in which 6 parts by mass of an HMDI curing agent and 22 parts by mass of silica having an average particle size of 2 μm are blended with 100 parts by mass of an acrylic-urethane copolymer resin. was applied to form a primer layer having a thickness of 2 μm to prepare a decorative sheet. RSm/Rz of the surface of the decorative sheet was 1. RSm, Rz, and RSm/Rz of the surface of the decorative sheet were measured by the following measuring methods.

(Method for measuring RSm, Rz, and RSm/Rz)
A range of 5 cm long and 5 cm wide was selected arbitrarily on the surface of the decorative sheet. Within the above range, arbitrarily select 5 points and measure in the width direction (TD direction) of the decorative sheet under JIS B0633: 2001-compliant measurement conditions (evaluation length is 40 mm), JIS B0601: 2013-compliant. The average length RSm and the maximum height Rz of the roughness curve elements were measured by the measurement method described above, and the average values of the five points were used as the measured values of RSm and Rz. RSm/Rz was then calculated from the measured values of RSm and Rz.

(Production of decorative material)
A 12 mm lauan plywood was attached to the back primer layer of the decorative sheet to prepare a decorative material. A urethane-modified ethylene/vinyl acetate emulsion adhesive (application amount: 9 g/30.3 cm ² in a wet state containing a solvent) was used for adhesion.

Example 2
A decorative sheet and a decorative material were prepared in the same manner as in Example 1, except that the amount of silica in the resin composition for forming a primer layer was 10 parts by mass, and the RSm/Rz of the surface of the decorative sheet was 20 by embossing. got

Example 3
A decorative sheet and a decorative material were prepared in the same manner as in Example 1 except that the amount of silica in the resin composition for forming a primer layer was 30 parts by mass, and the RSm/Rz of the surface of the decorative sheet was 39 by embossing. got

Comparative example 1
A decorative sheet and a decorative sheet were prepared in the same manner as in Example 1 except that the amount of silica in the resin composition for forming a primer layer was 22 parts by mass, and the surface of the decorative sheet was embossed so that RSm/Rz on the surface of the decorative sheet was 0.1. I got the cosmetics.

Comparative example 2
A decorative sheet and a decorative material were prepared in the same manner as in Example 1, except that the amount of silica in the resin composition for forming a primer layer was 22 parts by mass, and the RSm/Rz of the surface of the decorative sheet was 45 by embossing. got

(evaluation)
The decorative sheets and decorative materials of Examples and Comparative Examples manufactured as described above were evaluated by the following methods.

Formation of primer layer (primer coating suitability)
The decorative sheets of the above examples and comparative examples were cut into squares of 3 cm long and 3 cm wide to prepare test pieces. After the test piece was immersed in a urethane staining solution at 80° C. for 12 hours, the sheet surface was observed with a microscope, and whether or not the concave portions were stained was evaluated according to the following evaluation criteria. If the evaluation is + or higher, a sufficient primer layer is formed on the surface of the decorative sheet, and it is evaluated that there is no problem in actual use.
+++: The recesses are completely (100%) stained ++: The staining rate of the recesses is 90% or more and less than 100% +: The staining rate of the recesses is 80% or more and less than 90% -: The staining rate of the recesses is less than 80%

Matt Design The decorative sheets of the above examples and comparative examples were spread out in a fluorescent lamp room, visually observed under oblique light conditions, and evaluated according to the following evaluation criteria. If the evaluation is + or higher, it is evaluated that there is no problem in actual use.
++: Not glossy +: Slightly glossy -: Glossy

Suppression of conspicuous scratches and stains The surface of the decorative sheet of the above Examples and Comparative Examples was scratched with a fingernail by applying only the weight of the hand, and the surface of the decorative sheet was pressed with the pad of the finger for 2 to 3 seconds. After that, the appearance was visually observed and evaluated according to the following evaluation criteria. If the evaluation is + or higher, it is evaluated that there is no problem in actual use.
++: Scratch marks and finger oil marks cannot be seen from any angle +: Scratch marks and/or finger oil marks are visible from a certain angle -: Scratch marks and/or finger Grease marks visible from every angle

A decorative sheet of an arbitrary length was pulled out from a roll-shaped decorative sheet for suppressing sticking of wood chips, and was electrified by peeling, and 1 g of wood chips was scattered on the primer layer side of the charged sheet. Then, the decorative sheet was set vertically. Wood chips remaining on the decorative sheet were collected, and the weight of the collected wood chips was measured and evaluated according to the following evaluation criteria. If the evaluation is + or higher, it is evaluated that there is no problem in actual use.
++: The weight of wood chips is less than 100 mg +: The weight of wood chips is 100 mg or more and 300 mg or less -: The weight of wood chips is more than 300 mg

Suppression of Winding Looseness The decorative sheets of the above examples and comparative examples were wound using a winding roll under the conditions of a winding tension of 80 N and a winding number of 400 m to produce decorative sheet rolls. The decorative sheet rolls of the above Examples and Comparative Examples were rolled 10 times in one direction and then 10 times in the opposite direction. Next, the state of misalignment in the width direction (TD direction) of the laminated decorative sheets forming the decorative sheet roll was checked and evaluated according to the following evaluation criteria. In the following evaluation, the width (mm) of the deviation is the width between the decorative sheet of each winding layer forming the decorative sheet roll and the decorative sheet of the immediately above winding layer that is in contact with the decorative sheet of each winding layer. This is the width (mm) of the deviation in the direction (TD direction). Also, if the evaluation is + or higher, it is evaluated that there is no problem in actual use.
++: No misalignment of the decorative sheet +: Misalignment of the decorative sheet occurred, but the maximum interlayer misalignment was within 5 mm -: Misalignment of the decorative sheet occurred, and at least one interlayer misaligned was a deviation of more than 5 mm

Table 1 shows the results.

Example 4
As a primer agent that forms the back primer layer, 3 parts by mass of an inorganic silver-based antiviral agent (manufactured by Koa Glass Co., Ltd.: trade name Million Guard) with an average particle size of 1 μm is added to 100 parts by mass of urethane-cellulose resin. An added primer agent was prepared. A decorative sheet was produced in the same manner as in Example 1, except that the primer agent was used to form a back primer layer.

Example 5
Three particles containing a styrene polymer derivative compound (Shima Boeki Co., Ltd.: trade name VERSA-TL3) are added as an antiviral agent to 100 parts by mass of the primer layer-forming resin composition to be coated on the transparent resin layer. A decorative sheet was produced in the same manner as in Example 1, except that parts by mass were added.

(evaluation)
The antiviral performance of the decorative sheets of Examples 4 and 5 produced as described above was evaluated by the following method.

Antiviral performance Antiviral test method (ISO 21702) for the back primer layer of the decorative sheet produced in Example 4 and the primer layer (primer layer formed on the transparent resin layer) of the decorative sheet produced in Example 5 An antiviral performance test was performed in accordance with the method, and the antiviral activity value against influenza virus was evaluated according to the following evaluation criteria.
+: Antiviral activity value after 24 hours is 2.0 or more -: Antiviral activity value after 24 hours is less than 2.0

Table 2 shows the results.

DESCRIPTION OF SYMBOLS 1... Decorative sheet 11... Back primer layer 12... Base material sheet 13... Patterned layer 14... Transparent adhesive layer 15... Transparent resin layer 16... Primer layer Reference Signs List 17 Concavo-convex pattern 2 Decorative material 21 Adherent material 22 Adhesive layer 23 Grooved portion 24 Chamfered portions 25, 26 Paint 27 coating

Claims (14)

A decorative sheet having a transparent resin layer and a primer layer in this order on a base sheet made of at least a polyolefin resin,
The surface of the decorative sheet has a ratio (RSm/Rz) of the average length RSm to the maximum height Rz of the roughness curve element, measured by a measurement method conforming to JIS B0601:2013, of 1 or more and less than 40.
A cosmetic sheet characterized by: The decorative sheet according to claim 1, wherein the primer layer contains an inorganic filler. 3. The decorative sheet according to claim 2, wherein the content of the inorganic filler is 10 to 30 parts by mass with respect to 100 parts by mass of the cured resin component forming the primer layer. The decorative sheet according to claim 1, having an uneven pattern on its surface. A decorative material having an adherend on the surface opposite to the primer layer of the decorative sheet according to any one of claims 1 to 4. The decorative material according to claim 5, wherein the decorative sheet side has a grooved portion and/or a chamfered portion. The decorative material according to claim 6, wherein the grooved portion and/or the chamfered portion are coated with paint. The decorative material according to claim 5, having a coating film on the primer layer. The decorative material according to claim 8, wherein the coating film is made of an ionizing radiation-curable resin. The decorative material according to claim 9, wherein the ionizing radiation curable resin is an ultraviolet curable resin. 9. The cosmetic material according to claim 8, wherein said coating film contains at least one selected from the group consisting of an antibacterial agent, an antiviral agent, an antiallergen agent, and an antifungal agent. (1) having a step 1 of manufacturing a decorative material by attaching a decorative sheet to an adherend;
The decorative sheet has a transparent resin layer and a primer layer in this order on a base sheet made of at least a polyolefin resin,
The surface of the decorative sheet has a ratio (RSm/Rz) of the average length RSm to the maximum height Rz of the roughness curve element, measured by a measurement method conforming to JIS B0601:2013, of 1 or more and less than 40.
A method for manufacturing a decorative material characterized by: After step 1, further
(2) step 2 of forming a grooved portion and/or a chamfered portion on the decorative sheet side of the decorative material;
(3) Step 3 of applying paint to the grooved portion and/or the chamfered portion;
(4) Step 4 of scraping off paint from portions other than the grooved portion and/or the chamfered portion
having
The manufacturing method according to claim 12. 14. The manufacturing method according to claim 12, further comprising a coating film forming step of forming a coating film on the decorative sheet side of the decorative material.

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