WO2016125906A1

WO2016125906A1 - Decorative member

Info

Publication number: WO2016125906A1
Application number: PCT/JP2016/053577
Authority: WO
Inventors: 将徳上野; 宏平入山; 知香船曵
Original assignee: 大日本印刷株式会社
Priority date: 2015-02-06
Filing date: 2016-02-05
Publication date: 2016-08-11
Also published as: JP6760459B2; JP2020019281A; JP6597644B2; JPWO2016125906A1

Abstract

The purpose of the present invention is to provide a decorative member which has excellent heat shielding performance and design properties. This decorative member comprises, in order, an adherend and a decorative sheet which itself comprises, in order, a base material sheet, a decoration layer and a surface protective layer, wherein the base material sheet makes up no more than 75% of the decorative sheet by volume, and, calculated according to JIS K 5602, the solar reflectance of the decorative sheet in the wavelength range 780-2500nm is 25% or greater, and, calculated according to JIS K 5602, the solar reflectance of the decorative member in the wavelength range 780-2500nm is 35% or greater.

Description

Decorative material

The present invention relates to a decorative member.

In addition to the interior and exterior components of buildings such as walls, ceilings and floors, window frames, doors, handrails, skirting boards, edges, malls and other fittings, surface decoration boards for cabinets such as kitchens, furniture or light electrical appliances, OA equipment, As a vehicle interior / exterior member, generally, a metal member such as a steel plate, a resin member, or a wood member is used as an adherend, and a decorative sheet is bonded thereto (for example, Patent Document 1). In particular, members such as exterior members, doors, and window frames are used in an environment where they are exposed to direct sunlight. In addition, there is a problem that the heat of direct sunlight propagates through the members into the building and the temperature inside the building rises. This problem occurs when carbon black, which easily absorbs heat, is used as a pigment generally used for any layer constituting a decorative member, for example, an adherend, a base material, or a decorative layer, particularly a black pigment. It is remarkable.

In order to solve various problems caused by direct sunlight, a thermal barrier decorative sheet characterized by using perelin black as a pigment used in a printed layer in the decorative sheet has been proposed (for example, Patent Document 2). There has also been proposed a thermal insulation decorative sheet using an azomethine azo resin as a black pigment in a pattern layer (for example, Patent Document 3).

JP 59-178252 A JP 2013-237248 A JP 2014-43066 A

However, in

Patent Documents

2 and 3, although heat shielding is studied depending on the type of pigment used in the printed layer, no study is made on heat shielding according to the mode of the layer constituting the decorative sheet. In addition, perelin black and azomethine azo resins are organic pigments, and are less concealing and coloring than inorganic pigments, so it is difficult to meet strict customer needs from the viewpoint of design.

The present invention has been made under such circumstances, and an object of the present invention is to provide a decorative member having excellent heat shielding performance and design properties.

As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that the problem can be solved by the following invention. That is, the present invention provides a decorative member having the following configuration.

[1] A decorative member having an adherend and a decorative sheet having a base sheet, a decorative layer, and a surface protective layer in this order, wherein the volume occupation ratio of the base sheet to the decorative sheet is 75%. The decorative member having a solar reflectance of 25% or more in the wavelength range of 780 to 2500 nm of the decorative sheet calculated according to JIS K 5602: 2008 and calculated according to JIS K 5602: 2008 A decorative member having a solar reflectance in a wavelength range of 780 to 2500 nm of 35% or more.
[2] The decorative member according to [1], in which a resin layer is provided between the decorative layer and the surface protective layer.

ADVANTAGE OF THE INVENTION According to this invention, it can provide the decorative member which has the outstanding heat insulation performance and also has designability.

It is a cross-sectional schematic diagram which shows an example of the layer structure of the decorative member of this invention.

[Decorative material]
The decorative member of the present invention is a decorative member having an adherend, and a decorative sheet having a base sheet, a decorative layer, and a surface protective layer in this order. The decorative sheet has a volume occupation with respect to the decorative sheet. The solar reflectance in the wavelength range of 780 to 2500 nm of the decorative sheet calculated according to JIS K 5602: 2008 is 25% or more, and calculated according to JIS K 5602: 2008. The decorative member has a solar reflectance of 35% or more in a wavelength range of 780 to 2500 nm.
Hereinafter, the configuration of the decorative member of the present invention will be described in detail with reference to FIG. FIG. 1 shows an example of a preferred layer structure of a decorative member 10 according to the present invention. The decorative member 10 shown in FIG. 1 is a base material sheet on an adherend 1 via an adhesive layer 2. 31, a decorative sheet 3 including a decorative layer 32, a surface protective layer 34, and a resin layer 33 that is preferably provided between the decorative layer 32 and the surface protective layer 34.

First, the volume occupation ratio with respect to the decorative sheet of the base material sheet of the present invention and the solar reflectance of the decorative sheet and the decorative member will be described.
In the present invention, the volume occupation ratio of the base sheet to the decorative sheet is required to be 75% or less. If the volume occupancy exceeds 75%, heat tends to accumulate in the base sheet, so that excellent heat shielding performance cannot be obtained. From the viewpoint of obtaining excellent heat shielding performance and being easy to handle as a decorative sheet, and if the base sheet is colored, concealing the adherend and obtaining excellent design properties, The volume occupation ratio of the base sheet to the decorative sheet is preferably 20 to 75%, more preferably 25 to 70%, and further preferably 25 to 55%.
In addition, in this specification, the volume occupation rate with respect to the decorative sheet of the said base material sheet is computed from the cross-sectional area of the base material sheet per unit length and a decorative sheet.

In the present invention, the solar reflectance of the decorative sheet is required to be 25% or more. If it is less than 25%, excellent heat shielding performance cannot be obtained. From the viewpoint of obtaining excellent heat-shielding performance and obtaining a degree of freedom in selecting a material for forming each layer and selecting a pattern and color tone of the decorative layer, the solar reflectance of the decorative sheet is preferably 25 to 60%, preferably 30 to 55. % Is more preferable, and 35 to 55% is more preferable. Here, the solar reflectance of the decorative sheet is calculated according to JIS K 5602: 2008 (how to obtain the solar reflectance of the coating film, wavelength range: 780 to 2500 nm). Specifically, the spectrophotometer Was used to measure the spectral reflectance of the decorative sheet at an incident angle of 10 °, and using the obtained data, JIS K 5602: 2008 (How to determine the solar reflectance of a coating film, wavelength range: 780 to 2500 nm) Calculated according to

In the present invention, the solar reflectance of the decorative member in the wavelength range of 780 to 2500 nm is required to be 35% or more. If it is less than 35%, excellent heat shielding performance cannot be obtained. From the viewpoint of obtaining excellent heat-shielding performance and obtaining a degree of freedom in selecting a material for forming each layer and selecting a pattern and color tone of the decorative layer, 40 to 70% is preferable, and 45 to 65% is more preferable. Here, the solar reflectance of the decorative member is calculated according to JIS K 5602: 2008 (how to determine the solar reflectance of the coating film, wavelength range: 780 to 2500 nm). Specifically, the spectrophotometer Was used to measure the spectral reflectance of the decorative sheet at an incident angle of 10 °, and using the obtained data, JIS K 5602: 2008 (How to determine the solar reflectance of a coating film, wavelength range: 780 to 2500 nm) Calculated according to

(Substrate)
Next, each layer which comprises the decorative member of this invention is demonstrated.
Examples of the adherend include plate materials such as flat plates and curved plates, three-dimensional articles, sheets (or films), and the like. For example, wood members such as wood fiber boards such as wood veneer, wood plywood, particle board, and MDF (medium density fiber board), and three-dimensional articles; Or metal members used as sheets, etc .; glass, ceramics such as ceramics, non-cement ceramic materials such as gypsum, non-ceramic ceramic materials such as ALC (lightweight cellular concrete) plates, etc. Ceramic materials such as: acrylic resin, polyester resin, polystyrene resin, polyolefin resin such as polypropylene, ABS (acrylonitrile-butadiene-styrene copolymer) resin, phenol resin, vinyl chloride resin, cellulose resin, rubber plate, etc. Resin member used as shaped article or sheet It is. Moreover, these members can be used individually or in combination of multiple types.

In the present invention, it may be appropriately selected from the above according to the application, and it is a member for interior and exterior of a building such as a wall, ceiling, floor, window frame, door, handrail, skirting board, surrounding edge, mall, etc. When using as a use, a wood member, a metal member, a resin member, and a member combining these are preferable.

The solar reflectance in the wavelength range of 780 to 2500 nm of the adherend is preferably 50% or more, more preferably 60% or more, further preferably 70% or more, and an upper limit of 100 from the viewpoint of obtaining excellent heat shielding performance. % Or less is preferable, and considering the degree of freedom in selecting the adherend, 95% or less is more preferable, and 90% or less is more preferable. The solar reflectance of the adherend is preferably higher than that of the decorative sheet.
The thickness of the adherend may be appropriately selected depending on the application and material, and is usually preferably 0.1 to 5 mm, more preferably 0.1 to 3 mm.
The solar reflectance in the wavelength range of 780 to 2500 nm of the adherend can be calculated in the same manner as the solar reflectance of the decorative sheet described above.

(Adhesive layer)
In order to obtain excellent adhesion, the adherend and the decorative sheet are preferably bonded together via an adhesive layer. It does not specifically limit as an adhesive agent used for an adhesive bond layer, A well-known adhesive agent can be used, For example, adhesive agents, such as a heat sensitive adhesive and a pressure sensitive adhesive, are mentioned preferably. Examples of the resin used for the adhesive constituting the adhesive layer include acrylic resins, polyurethane resins, vinyl chloride resins, vinyl acetate resins, vinyl chloride-vinyl acetate copolymer resins, and styrene-acrylic copolymers. At least one resin selected from polymer resins, polyester resins, polyamide resins and the like is used. Further, a two-component curable polyurethane adhesive or polyester adhesive using an isocyanate or the like as a curing agent can also be applied.
An adhesive can also be used for the adhesive layer. As the pressure-sensitive adhesive, an acrylic, urethane, silicone, rubber, or other pressure-sensitive adhesive can be appropriately selected and used.

The adhesive layer is formed by applying the above resin into a form that can be applied, such as a solution or an emulsion, by means of a gravure printing method, a screen printing method, or a reverse coating method using a gravure plate. It can be formed by applying and drying on at least one of the sheets.
The thickness of the adhesive layer is not particularly limited, but is usually in the range of 1 to 100 μm. By setting it within this range, excellent adhesiveness can be obtained.

[Decorative sheet]
The decorative member of the present invention has an adherend and a decorative sheet having a base sheet, a decorative layer, and a surface protective layer in this order, that is, the adherent and the base sheet of the decorative sheet face each other. It is provided as follows.

(Substrate sheet)
As the base sheet of the decorative sheet used in the present invention, those usually used as the base sheet of the decorative sheet can be adopted without limitation, and are easy to handle, and thus are composed of a polyester resin and a polyolefin resin. A substrate sheet is preferred.
Preferred examples of the polyester resin include polyethylene terephthalate (hereinafter sometimes referred to as “PET”), polybutylene terephthalate, polyethylene naphthalate, polyarylate, polycarbonate, ethylene terephthalate-isophthalate copolymer, polyarylate, and the like. Of these, polyethylene terephthalate and polybutylene terephthalate are more preferable, and polyethylene terephthalate is more preferable.
Preferred examples of the polyolefin resin include polyethylene (low density, medium density, high density), polypropylene, polymethylpentene, polybutene, ethylene-propylene copolymer, propylene-butene copolymer, and polyethylene and polypropylene are more preferable. .

The thickness of the base sheet is not limited as long as the volume occupation ratio of the base sheet to the decorative sheet is 75% or less, and is preferably 20 to 130 μm, more preferably 30 to 100 μm, and more preferably 40 to 90 μm is more preferable.

The base sheet is preferably a colored resin sheet made of a colored resin. By using a colored resin, when the surface hue of the adherend to which the decorative sheet is stuck varies, the surface hue can be well concealed, so that an excellent design can be obtained. The stability of the color tone of the decorative layer provided accordingly can be ensured. Moreover, it is preferable that it is white from a viewpoint of obtaining the outstanding heat insulation performance.

The colorant used for the above-mentioned purpose may be appropriately selected depending on the application. For example, the base sheet can be colored colored or colored and opaque. In general, since it is necessary to conceal the surface of the adherend, it is preferable to make it colored and opaque.
Examples of the colorant include inorganic pigments such as iron black, titanium white, antimony white, yellow lead, titanium yellow, petal, cadmium red, ultramarine, and cobalt blue; organic pigments such as quinacridone red, isoindolinone yellow, and phthalocyanine blue; Dyes; metal pigments composed of scaly foils such as aluminum and brass; pearlescent (pearl) pigments composed of scaly foils such as titanium dioxide-coated mica and basic lead carbonate are preferably used. In the present invention, from the viewpoint of obtaining excellent heat shielding performance, the addition amount of carbon black (black) as the colorant is preferably 5.0 parts by mass or less with respect to 100 parts by mass of the resin forming the base sheet, 1.0 mass part or less is more preferable, and it is still more preferable not to add. Since carbon black (black) has the property of easily absorbing heat, the use of carbon black (black) in the decorative sheet makes it easier for the decorative sheet to absorb heat and reduces the heat shielding performance. is there. Further, when titanium oxide is used as the white pigment, it is not particularly limited, but the crystal type is known as a rutile type, anatase type, brookite type, etc., and has excellent whiteness, weather resistance and heat shielding. The rutile type is preferred from the characteristics such as performance. Further, since titanium oxide may deteriorate the resin by photocatalytic action, it is preferably surface-treated with a surface coating agent for the purpose of stabilizing the photocatalytic action, and the composition of the surface coating agent is limited. For example, inorganic oxides such as silicon oxide, alumina, or zinc oxide can be used. The coating method of the surface coating agent is not particularly limited, and titanium oxide obtained by a known method can be used.
The addition amount of the colorant is preferably 1 to 30 parts by weight, preferably 1 to 20 parts by weight with respect to 100 parts by weight of the resin forming the base sheet so that the resin content is not extremely reduced in consideration of weather resistance. More preferred.

In addition, the base sheet is made of a physical method such as an oxidation method or a concavo-convex method on one or both sides in order to enhance the interlayer adhesion between the base sheet and other layers, or to enhance the adhesion to various adherends. Or chemical surface treatments can be applied.
Examples of the oxidation method include corona discharge treatment, chromium oxidation treatment, flame treatment, hot air treatment, ozone / ultraviolet treatment method, and examples of the unevenness method include sand blast method and solvent treatment method. These surface treatments are appropriately selected depending on the type of substrate, but generally, a corona discharge treatment method is preferably used from the viewpoints of effects and operability.
Moreover, you may perform processes, such as forming a primer layer and a back surface primer layer, for the purpose of reinforcement | strengthening of the interlayer adhesiveness of a base material sheet and each layer.

Furthermore, an inorganic filler may be added to the base sheet as necessary. Examples of the inorganic filler include calcium carbonate, barium sulfate, clay, talc, silica (silicon dioxide), and alumina (aluminum oxide). And the like. The added amount of the inorganic filler is usually 1 to 50 parts by mass with respect to 100 parts by mass of the resin forming the base sheet.
Moreover, the various other additives, for example, a foaming agent, a flame retardant, a lubricant, an antioxidant, a ultraviolet absorber, a light stabilizer, etc. may be mix | blended with the base material sheet as needed.

(Decoration layer)
The decorative layer of the decorative sheet used in the present invention imparts decorative properties to the decorative member of the present invention, and may be a colored layer (so-called solid colored layer) covering the entire surface, and various patterns may be used as inks. And a pattern layer formed by printing using a printing press, or a combination of these.

As the ink used for the decoration layer, a binder and a colorant such as a pigment and a dye, an extender pigment, a solvent, a stabilizer, a plasticizer, a catalyst, and a curing agent are appropriately mixed.
The binder is not particularly limited, and a curable resin such as a thermoplastic resin, a one-component curable resin, or a two-component curable resin can be used. For example, urethane resin, acrylic urethane resin, vinyl chloride / vinyl acetate copolymer From coalescing resin, vinyl chloride / vinyl acetate / acrylic copolymer resin, chlorinated polypropylene resin, acrylic resin, polyester resin, polyamide resin, butyral resin, polystyrene resin, nitrocellulose resin (nitrified cotton), cellulose acetate resin, etc. Arbitrary things are used individually by 1 type or in mixture of 2 or more types.

As a coloring agent, the same thing as what was illustrated as a coloring agent used for said base material sheet can be mentioned preferably. It is also the same that it is preferable not to use carbon black (black).

When the decoration layer has a pattern, the pattern may be a wood pattern, a marble pattern (for example, a travertine marble pattern), a stone pattern imitating the surface of a rock, a fabric pattern imitating a cloth or cloth pattern, or tiling There are patterns, brickwork patterns, etc., and there are also patterns such as parquets and patchwork that combine these. These patterns are formed by multicolor printing with the usual yellow, red, blue and black process colors, as well as by multicolor printing with special colors prepared by preparing the individual color plates that make up the pattern. Is done.
In the present invention, an excellent design property can be obtained even in the case of a dark color, and a texture (tactile sensation) can be expressed by a concave shape to be described later. Is suitable. In addition, as described above, it is preferable not to use carbon black (black) from the viewpoint of heat shielding performance, but the present invention can be applied to the volume occupancy of the base sheet, the decorative sheet, and the decorative member without using carbon black. With the configuration in which the solar reflectance is in a specific range, it is possible to obtain excellent design properties even in the case of dark colors, and both excellent heat shielding performance and design properties are achieved.

The thickness of the decoration layer may be appropriately selected according to the desired pattern, but is usually 1 to 20 μm, preferably 1 to 10 μm.

(Surface protective layer)
The surface protective layer of the decorative sheet used in the present invention is provided directly on the decorative layer or on another layer, for example, a resin layer described later provided on the decorative layer as necessary. It is a layer located on the outermost surface of the decorative member, and is a layer that imparts surface characteristics such as scratch resistance, abrasion resistance, chemical resistance, etc. to the decorative member of the present invention. The surface protective layer is preferably composed of a cured product of a resin composition containing a curable resin. By comprising the hardened | cured material of curable resin composition, the surface characteristic of a decorative member can be improved.

As the curable resin used for forming the surface protective layer, an ionizing radiation curable resin is preferably used in addition to a thermosetting resin such as a two-component curable resin, and a plurality of these are used, for example, ionizing radiation curing. A so-called hybrid type may be used in which a curable resin and a thermosetting resin are used in combination, or a curable resin and a thermoplastic resin are used in combination.
From the viewpoint of increasing the crosslink density of the resin forming the surface protective layer and improving the scratch resistance and wear resistance of the surface, ionizing radiation curable resins are preferable, and can be applied without solvent and handled. From the viewpoint of being easy, an electron beam curable resin is more preferable.

(Ionizing radiation curable resin)
An ionizing radiation curable resin is a resin that has an energy quantum that can crosslink and polymerize molecules in electromagnetic waves or charged particle beams, that is, a resin that crosslinks and cures when irradiated with ultraviolet rays or electron beams. is there. Specifically, it can be appropriately selected from polymerizable monomers, polymerizable oligomers, or prepolymers conventionally used as ionizing radiation curable resins.

Typically, as the polymerizable monomer, a (meth) acrylate monomer having a radical polymerizable unsaturated group in the molecule is preferable, and among them, a polyfunctional (meth) acrylate is preferable. Here, “(meth) acrylate” means “acrylate or methacrylate”. The polyfunctional (meth) acrylate is not particularly limited as long as it is a (meth) acrylate having two or more ethylenically unsaturated bonds in the molecule. These polyfunctional (meth) acrylates may be used singly or in combination of two or more.

Next, as the polymerizable oligomer, an oligomer having a radical polymerizable unsaturated group in the molecule, for example, epoxy (meth) acrylate, urethane (meth) acrylate, polyester (meth) acrylate, polyether (meth) acrylate And the like.
Furthermore, other polymerizable oligomers include polybutadiene (meth) acrylate oligomers with high hydrophobicity that have (meth) acrylate groups in the side chain of polybutadiene oligomers, and silicone (meth) acrylate oligomers that have polysiloxane bonds in the main chain. In a molecule such as an aminoplast resin (meth) acrylate oligomer modified with an aminoplast resin having many reactive groups in a small molecule, or a novolak epoxy resin, bisphenol epoxy resin, aliphatic vinyl ether, aromatic vinyl ether, etc. There are oligomers having a cationic polymerizable functional group.

In the present invention, a monofunctional (meth) acrylate can be used in combination with the polyfunctional (meth) acrylate and the like as long as the purpose of the present invention is not impaired for the purpose of reducing the viscosity. . These monofunctional (meth) acrylates may be used alone or in combination of two or more.

The thickness of the surface protective layer is preferably 2 to 25 μm, more preferably 2 to 15 μm, from the viewpoint of obtaining excellent scratch resistance and durability, and surface properties such as wear resistance and chemical resistance. 10 μm is more preferable.

The resin composition forming the surface protective layer can contain various additives other than those described above as long as the performance is not impaired. Examples of various additives include polymerization inhibitors, crosslinking agents, antistatic agents, adhesion improvers, antioxidants, leveling agents, thixotropic agents, coupling agents, plasticizers, antifoaming agents, fillers, and solvents. Etc.

(Resin layer)
The decorative sheet used in the present invention preferably has a resin layer between the base sheet and the surface protective layer from the viewpoint of protecting the decorative layer and improving scratch resistance.
Preferred examples of the resin constituting the resin layer include an acrylic resin, a polycarbonate resin, a polyurethane resin, a polystyrene resin, a vinyl chloride resin, and a vinyl acetate resin in addition to the polyester resin and the polyolefin resin used as the base sheet. From the viewpoint of improvement of molding processability and scratch resistance, polyester resins and polyolefin resins are preferable, and polyolefin resins are more preferable. Further, from the same viewpoint, it is preferable that both the base sheet and the resin constituting the resin layer are polyolefin resins.

The resin layer may be provided between the base sheet and the surface protective layer, and is preferably provided between the decorative layer and the surface protective layer from the viewpoint of protecting the decorative layer.
The resin layer may be transparent or opaque, and when provided between the decorative layer and the surface protective layer, the resin layer is preferably transparent from the viewpoint of making the decorative layer visible more clearly. Here, the term “transparent” includes colorless and transparent as well as colored and translucent. In the case of being colored, preferred examples of the colorant used include those exemplified as the colorant used in the substrate sheet. It is also the same that it is preferable not to use carbon black (black).

The thickness of the resin layer is preferably 20 to 130 μm, more preferably 30 to 100 μm, and still more preferably 40 to 90 μm. When the thickness of the resin layer is within the above range, the protective function of the decorative layer and the scratch resistance can be improved.

The resin layer can be subjected to a physical or chemical surface treatment such as an oxidation method or a concavo-convex method on one or both sides from the viewpoint of improving adhesiveness with each layer. As these physical or chemical surface treatments, the same method as the surface treatment of the substrate sheet is preferably exemplified. In addition, the resin layer can be subjected to a treatment such as forming a primer layer or a back primer layer from the viewpoint of improving the adhesion with each layer.

(Adhesive layer)
The decorative sheet used in the present invention can have an adhesive layer as necessary. In particular, when the resin layer is provided, it is effective to provide an adhesive layer when improving the adhesion between the resin layer and the decorative layer. As an adhesive constituting the adhesive layer, an adhesive usually used in a decorative sheet can be used, and its thickness is about 0.1 to 50 μm, and 1 to 30 μm from the viewpoint of obtaining sufficient adhesiveness. A range is preferred.

The adhesive is not particularly limited, and examples thereof include urethane adhesives, acrylic adhesives, epoxy adhesives, rubber adhesives, etc. Among them, urethane adhesives are preferable in terms of adhesive strength. . In addition, as such a urethane type adhesive agent, for example, a two-component curable type containing various polyol compounds such as polyether polyol, polyester polyol, and acrylic polyol and various polyisocyanate compounds such as tolylene diisocyanate and hexamethylene diisocyanate. An adhesive using a urethane resin may be mentioned. Acrylic-polyester-vinyl chloride resins and the like are also suitable adhesives that can easily exhibit adhesiveness by heating and maintain adhesive strength even when used at high temperatures.
The adhesive layer can be formed by a known layer forming method such as a coating method using an adhesive composition comprising these resins.

(Primer layer)
As described above, the decorative sheet used in the present invention can have a primer layer and a back primer layer in any one of the respective layers, as necessary, in order to improve the adhesion between the respective layers. For example, a decorative member excellent in interlayer adhesion can be obtained by providing a primer layer as a back primer layer on the substrate sheet side between the adherend and the substrate sheet. Moreover, when providing a surface protective layer and another layer, for example, a resin layer, providing a primer layer between the resin layers is effective from the viewpoint of obtaining excellent scratch resistance of the decorative member of the present invention.

The primer layer is a transparent or translucent layer, and can be formed using, for example, the resin exemplified as the binder resin used in the decorative layer. The thickness of the primer layer is usually about 0.5 to 20 μm, preferably 0.5 to 5 μm, more preferably 0.5 to 3 μm.

(Concave shape)
The decorative member of the present invention preferably has a concave shape at least on the surface protective layer. Since the decorative member of the present invention has a concave shape, it is particularly excellent in texture (tactile feel). This concave shape should just exist in the surface protective layer at least, and there may exist what reaches a base material sheet. From the viewpoint of obtaining an excellent texture (tactile sensation), it is preferable to combine not only those that remain in the surface protective layer but also those that extend to the resin layer, those that extend to the decorative layer, and those that extend to the base sheet.
In addition, in this specification, when the said surface protective layer etc. have the said concave shape, the thickness of this surface protective layer etc. means the thickness measured in the location which does not have the said concave shape.

The maximum depth of the concave shape is preferably 15% or more and less than 100% with respect to the total thickness of the decorative sheet, more preferably 15 to 80%, and even more preferably 25 to 80%. Further, the maximum depth of the concave shape is preferably 15 μm or more, more preferably 20 μm or more, and further preferably 30 μm or more. By having such a maximum depth, the decorative sheet does not break during concave processing, for example, embossing, and it does not end up as if the concave shape was crushed. A texture (tactile sensation) is obtained, and as a result, excellent design properties are obtained.

Here, the measurement of the maximum depth of the concave shape is carried out by measuring the height from the lowest point of the concave shape to the surface of the surface protective layer using a surface roughness shape measuring instrument. , Cut-off value: 2.50 mm, Cut-off filter type: 2RC, Inclination correction method: Measured under linear measurement conditions, with the deepest being the maximum depth.

There is no restriction | limiting in particular about the method of giving a concave shape to a surface protective layer, For example, when the ease of work is considered, it is preferable to employ | adopt embossing. The embossing may be performed by a normal method using a known single-wafer or rotary embossing machine.

The decorative sheet used in the present invention has a lightness (CIE (International Lighting Commission) L ^* a ^* b ^* L ^* value in the color system) defined in JIS Z 8730: 2009 depending on the desired design. However, when a dark design is desired, for example, 50 or less is preferable, 45 or less is more preferable, and 35 or less is more preferable. When the lightness is within the above range, excellent design properties can be obtained even in the case of a dark color, and particularly when a wood grain pattern is adopted as a picture pattern, excellent design properties can be obtained. Note that when the brightness of the conventional decorative sheet was lowered to 50 or less, the solar reflectance was a low value of less than 25%, and sufficient heat shielding performance could not be obtained. However, the decorative sheet used in the present invention has a lightness. Even if it is made low as 50 or less, since solar radiation reflectance is controlled to become 25% or more as mentioned above, it will have sufficient heat insulation performance.

(Method for manufacturing decorative member)
About the manufacturing method of the decorative member of this invention, it is one of the preferable aspects as the decorative member of this invention, and the decorative sheet which has a base material sheet, a decoration layer, a resin layer, and a surface protective layer in order. Taking a decorative member provided as an example, the manufacturing method will be described. The decorative member of the present invention includes, for example, a step (1) of providing a decorative layer on a base sheet, a step (2) of providing a resin layer on the decorative layer, and applying a curable resin composition on the resin layer. It can be produced by sequentially passing through a step (3) for producing a decorative sheet by curing to form a surface protective layer and a step (4) for laminating the decorative sheet and an adherend.

Step (1) is a step of providing a decorative layer on the base sheet. A decoration layer is formed by apply | coating the ink used for a decoration layer on a base material sheet, and providing a desired colored layer and a pattern layer. The ink is applied by a known method such as a gravure printing method, a bar coating method, a roll coating method, a reverse roll coating method, or a comma coating method, preferably a gravure printing method.

Moreover, what is necessary is just to perform a surface treatment before apply | coating the ink used for a decoration layer, when surface-treating to a base material sheet. Even when the primer layer is provided between the base sheet and the decorative layer, it may be provided before applying the ink used for the decorative layer, and the surface opposite the surface on which the decorative layer of the base sheet is provided ( When the back primer layer is provided on the back surface, it may be provided when the ink used for the decorative layer is applied. The primer layer is formed by applying a resin composition forming the primer layer by a known method such as a gravure printing method, a bar coating method, a roll coating method, a reverse roll coating method, or a comma coating method. Can do.

Step (2) is a step of providing a resin layer on the decorative layer. The resin layer is formed by applying an adhesive to the base material sheet having the decorative layer as necessary to form an adhesive layer, and then using the resin composition for forming the resin layer to extrude and dry the resin layer. It can be formed by laminating by adhesion and pressure bonding by a method such as lamination, wet lamination, thermal lamination or the like.

Step (3) is a step in which a curable resin composition is applied on the resin layer and cured to form a surface protective layer. The surface protective layer is obtained by applying and curing an ionizing radiation curable resin composition containing the ionizing radiation curable resin on a resin layer or a primer layer provided on the resin layer as desired. It is done. In addition, when not providing a resin layer, after providing a decoration layer in a base material sheet, a curable resin composition may be apply | coated and hardened to form a surface protective layer.

Application of the resin composition for forming the surface protective layer is preferably gravure coating, bar coating, roll coating, reverse roll coating, comma coating, etc. so that the thickness after curing is usually about 1 to 20 μm. The known method is more preferably performed by gravure coating.

When an ionizing radiation resin composition is used for forming the surface protective layer, the uncured resin layer formed by applying the resin composition is irradiated with ionizing radiation such as an electron beam or ultraviolet ray to form a cured product. It becomes a protective layer. Here, when an electron beam is used as the ionizing radiation, the acceleration voltage can be appropriately selected according to the resin to be used and the thickness of the layer, but the uncured resin layer is usually cured at an acceleration voltage of about 70 to 300 kV. preferable.

The irradiation dose is preferably such that the crosslinking density of the ionizing radiation curable resin is saturated, and is usually selected in the range of 5 to 300 kGy (0.5 to 30 Mrad), preferably 10 to 50 kGy (1 to 5 Mrad).
The electron beam source is not particularly limited, and for example, various electron beam accelerators such as a cockroft Walton type, a bandegraft type, a resonant transformer type, an insulated core transformer type, a linear type, a dynamitron type, and a high frequency type are used. be able to.
When ultraviolet rays are used as ionizing radiation, those containing ultraviolet rays having a wavelength of 190 to 380 nm are emitted. There is no restriction | limiting in particular as an ultraviolet-ray source, For example, a high pressure mercury lamp, a low pressure mercury lamp, a metal halide lamp, a carbon arc lamp, etc. are used.

Moreover, when using a thermosetting resin composition for formation of a surface protective layer, it should just heat-process according to the resin composition to be used, and may make it harden | cure and form a surface protective layer.

Step (4) is a step of laminating the adherend and the decorative sheet prepared by the above steps (1) to (3), with the base sheet of the decorative sheet and the adherend facing each other. Laminate. Examples of the method of laminating the adherend and the decorative sheet include, for example, a laminating method in which a decorative sheet is pressed onto a plate-shaped adherend with a pressure roller and an adhesive is interposed therebetween. The decorative sheet is supplied through the wrapping process in which the decorative sheet is sequentially pressure-bonded and laminated to the plurality of side surfaces constituting the adherend by a plurality of different rollers, and fixed to the fixed frame. Heat up with a heater through a silicone rubber sheet until the decorative sheet softens, and press the vacuum molding die against the heated and softened decorative sheet. At the same time, suck air from the vacuum molding die with a vacuum pump. Preferable examples include vacuum forming processing in which the decorative sheet is firmly attached to the vacuum forming mold.

When a hot melt adhesive (heat sensitive adhesive) is used in laminating or wrapping, the heating temperature is usually 160 to 200 ° C., depending on the type of resin constituting the adhesive, and with reactive hot melt adhesives Usually about 100 to 130 ° C. The vacuum forming process is generally performed while heating, and is usually performed at about 80 to 130 ° C., preferably about 90 to 120 ° C.

The decorative member obtained as described above can be arbitrarily cut and subjected to optional decoration such as grooving and chamfering on the surface and the end of the mouth using a cutting machine such as a router or a cutter. And various uses, for example, interior and exterior members of buildings such as walls, ceilings, floors, window frames, doors, handrails, skirting boards, edges, moldings, etc., kitchens, furniture or light electrical appliances, OA equipment, etc. It can be used for a surface decorative board of a cabinet, an interior or exterior of a vehicle.

EXAMPLES Next, although an Example demonstrates this invention further in detail, this invention is not limited at all by this example.
(Evaluation methods)
(1) Calculation of solar reflectance For the decorative sheets and decorative members obtained in each of the examples and comparative examples, a spectrophotometer ("UV-3100PC (model number)", manufactured by Shimadzu Corporation) was used to protect the surface. Spectral reflectance was measured from the layer side at an incident angle of 10 °, and using the obtained data, the solar reflectance in the wavelength range of 780 to 2500 nm in accordance with JIS K 5602: 2008 was calculated.
(2) Measurement of lightness (L ^* value) For the decorative sheets obtained in each Example and Comparative Example, a spectrocolorimeter ("CM-3700d (model number)", manufactured by Konica Minolta Holdings, Inc.) was used. CIE (International Commission on Illumination) L ^* a ^* b ^* L ^* value in the color system defined by JIS Z 8730: 2009 was measured from the surface protective layer side.
(3) Evaluation of design property About the decorative sheet and the decorative member obtained by each Example and the comparative example, the external appearance was observed visually and the following reference | standard evaluated.
A: The design of the decorative member did not cause a great change from the design of the decorative sheet.
B: Although the design of the decorative member changed from the design of the decorative sheet, there was no practical problem.
C: The design of the decorative member was significantly changed from the design of the decorative sheet, causing problems in practical use.
(4) Evaluation of heat shielding performance A 200 W lamp (incandescent lamp, manufactured by Iwasaki Electric Co., Ltd.) was used for the decorative member obtained in each example and comparative example, and room temperature (23 ° C) and relative humidity 50%. Irradiated from a height of 30 cm under the conditions, the temperature of the decorative member after 10 minutes was measured and evaluated according to the following criteria.
A: The temperature rise was less than 75 ° C.
B: The temperature rise was 75 ° C. or more and less than 85 ° C.
C: The temperature rise was 85 ° C. or more and less than 95 ° C.
D: The temperature rise was 95 ° C. or higher.
(5) Appearance evaluation of weather resistance 120 minutes at a black panel temperature of 63 ° C. using a sunshine weather meter WEL-300 (manufactured by Suga Test Instruments Co., Ltd.) for the decorative members obtained in each Example and Comparative Example. A weather resistance test was conducted under the conditions of 18-minute rainfall, and after 4,000 hours, it was visually observed to examine the appearance of abnormalities such as floating and falling off of each layer such as the surface protective layer, and evaluated according to the following criteria. .
A: No major change in appearance was observed. That is, the change in appearance was hardly observed.
B: A slight change in appearance was observed.
C: A large change in appearance was observed, which was a problematic level.

Example 1
Polypropylene resin sheet subjected to double-sided corona discharge treatment (white colored resin sheet, thickness: 80 μm, containing 0.01 parts by mass of carbon black as a pigment with respect to 100 parts by mass of polypropylene resin, combined with titanium oxide, 10 parts by mass Part) is a base sheet, and a printing ink containing 1.0 part by weight of carbon black as a colorant is applied to one side of the base sheet by a gravure printing method. Then, a woodgrain decorative layer (thickness: 2 μm) was provided, and a two-part curable urethane-nitrified cotton mixed resin composition was applied to the other surface to form a back primer layer (thickness: 2 μm). A transparent polyurethane resin adhesive is applied on the decorative layer to form an adhesive layer (thickness after drying: 3 μm), and the transparent polypropylene resin is heated and melt-extruded by a T-die extruder to obtain a transparent layer. A resin layer was formed.
Next, the surface of the resin layer is subjected to corona discharge treatment, and then a two-component curable acrylic-urethane resin composition is applied by a gravure printing method to form a primer layer (thickness after drying: 1 μm), and further transparent An electron beam curable resin composition (electron beam curable resin: trifunctional urethane acrylate) was applied by a roll coating method (solid content: 3 g / m ² ), dried to form an uncured resin layer, and an oxygen concentration The surface of the uncured resin layer was cured by irradiation with an electron beam (pressurized voltage: 125 KeV, 5 Mrad) in an environment of 200 ppm to obtain a surface protective layer (thickness: 3 μm). Thereafter, embossing was performed from the surface protective layer side to form a concavo-convex pattern of a wood grain conduit pattern having a concave shape with a maximum depth of 30 μm, and the decorative sheet of Example 1 (total thickness: 160 μm) was obtained. The volume occupation ratio of the base material sheet in this decorative sheet is 50%.
A coated steel plate (thickness: 0.4 mm) coated with an adhesive composed of a two-component curable urethane resin is placed in an oven and cured at 150 ° C. for 1 minute, and immediately after using the roll laminator, A decorative member was prepared by sticking. Said evaluation is performed about the obtained decorative sheet and a decorative member, and the evaluation result is shown in Table 1.

Examples 2 and 6 and Comparative Example 4
In Example 1, Examples 2 and 6 were performed in the same manner as in Example 1 except that the volume occupancy of the base sheet was changed to the occupancy shown in Table 1 by changing the thickness of the base sheet. A decorative sheet and a decorative member of Comparative Example 4 were produced. Said evaluation is performed about the obtained decorative sheet and a decorative member, and the evaluation result is shown in Table 1.

Example 3
In Example 1, a decorative sheet and a decorative member were produced in the same manner as in Example 1, except that the carbon black content of the printing ink used for the decorative layer was changed to 3.0 parts by mass. Said evaluation is performed about the obtained decorative sheet and a decorative member, and the evaluation result is shown in Table 1.

Example 4
In Example 1, a decorative sheet and a decorative member were produced in the same manner as in Example 1 except that the carbon black content of the printing ink used for the decorative layer was changed to 0.1 part by mass. Said evaluation is performed about the obtained decorative sheet and a decorative member, and the evaluation result is shown in Table 1.

Example 5
In Example 1, the base sheet was replaced with a base sheet not containing carbon black and titanium oxide (polypropylene resin sheet, transparent and colorless, thickness: 80 μm), and the ink used for the decorative layer was ink containing no carbon black ( Instead of the complex oxide containing calcium element, titanium element and manganese element), the decorative sheet and A decorative member was produced. Said evaluation is performed about the obtained decorative sheet and a decorative member, and the evaluation result is shown in Table 1.

Example 7
In Example 1, a decorative sheet and a decorative member were prepared in the same manner as in Example 1 except that the amount of titanium oxide in the polypropylene resin sheet subjected to the double-sided corona discharge treatment was increased to 30 parts by weight of the pigment. Said evaluation is performed about the obtained decorative sheet and a decorative member, and the evaluation result is shown in Table 1.

Comparative Example 1
A colorless and transparent polypropylene resin sheet subjected to double-sided corona discharge treatment is used as a resin layer, and one side of the resin layer contains a two-part curable acrylic-urethane resin as a binder and 1.0 part by mass of carbon black as a colorant. The printing ink to be applied is applied by a gravure printing method to provide a wood grain pattern decoration layer (thickness: 2 μm), and a two-part curable acrylic-urethane resin composition is applied to the other surface by a gravure printing method to form a primer layer ( (Thickness after drying: 1 μm) and a transparent electron beam curable resin composition (electron beam curable resin: trifunctional urethane acrylate) is applied by a roll coating method (solid content: 3 g / m ² ). And drying to form an uncured resin layer, and irradiating with an electron beam (pressurized voltage: 125 KeV, 5 Mrad) in an environment with an oxygen concentration of 200 ppm to cure the uncured resin layer. Surface protective layer (thickness: 3 [mu] m) was obtained. Thereafter, embossing was performed from the surface protective layer side to form a concave-convex pattern of a wood grain conduit pattern having a concave shape with a maximum depth of 30 μm to obtain a decorative sheet (total thickness: 120 μm). Using the obtained decorative sheet, a decorative member was produced in the same manner as in Example 1. Said evaluation is performed about the obtained decorative sheet and a decorative member, and the evaluation result is shown in Table 1.

Comparative Examples 2 and 3
In Example 1, a base sheet (polypropylene resin sheet, brown color, thickness: 80 μm) containing 0.1 parts by mass of carbon black and an ink used for a decorative layer (Comparative Example 2: 8.0 for carbon black) (Comparative Example 3: containing 15.0 parts by mass of carbon black) and changing the solar reflectance of the decorative sheet and the decorative member to those described in Table 1 in the same manner as in Example 1. Thus, decorative sheets and decorative members of Comparative Examples 2 and 3 were prepared. Said evaluation is performed about the obtained decorative sheet and a decorative member, and the evaluation result is shown in Table 1.

The decorative member of the present invention has an excellent heat shielding performance as B evaluation (temperature rise is less than 85 ° C.) as an evaluation of the heat shielding performance, conceals the adherend, and has an excellent design. It was confirmed that. Even in Example 5 in which carbon black was not used, the brightness (L ^* value) could be suppressed to 30, which concealed the subject and had a dark wood grain pattern, and excellent design was obtained. In addition, the decorative member of Example 4 having a bright color tone was able to obtain design properties as well as excellent heat shielding performance. Moreover, in the decorative member of Example 7 with a large content of titanium oxide in the base sheet, since the amount of the resin component is small compared to the decorative member of Example 1 or the like, the weather resistance is higher than that of Example 1 or the like. It became a little inferior.
On the other hand, the decorative member of Comparative Example 1 in which the volume occupancy of the base sheet is small is inferior in design, while the decorative member of Comparative Example 4 in which the volume occupancy is large is good in design. It became inferior to the heat shielding performance. In addition, the decorative members of Comparative Examples 2 and 3 having low solar reflectance were inferior in heat shielding performance.

The decorative member of the present invention has excellent heat shielding performance and also has design properties, and is a member for interior and exterior of buildings such as walls, ceilings, floors, window frames, doors, handrails, skirting boards, In addition to fittings such as surrounding edges and malls, it can be suitably used for surface decorative boards for cabinets such as kitchens, furniture or light electrical appliances, OA equipment, and interior and exterior members of vehicles. In particular, taking advantage of its heat shielding performance, it is suitably used for members used in environments exposed to direct sunlight, such as exterior members, doors, and window frames.

1. Substrate material 2. Adhesive layer Cosmetic sheet 31. Base sheet 32. Decorative layer 33. Resin layer 34. Surface protective layer 10. Decorative material

Claims

A decorative member having an adherend and a decorative sheet having a base sheet, a decorative layer, and a surface protective layer in this order, wherein the volume occupation ratio of the base sheet to the decorative sheet is 75% or less. The solar reflectance of the decorative sheet calculated in accordance with JIS K 5602: 2008 is 25% or more in the wavelength range of 780 to 2500 nm, and the wavelength range of the decorative member calculated in accordance with JIS K 5602: 2008. A decorative member having a solar reflectance at 780 to 2500 nm of 35% or more.
The decorative member according to claim 1, wherein the brightness of the decorative sheet (CIE (International Lighting Commission) L * a * b * L * value in the color system) defined in JIS Z 8729-1994) is 50 or less.
The decorative member according to claim 1 or 2, wherein the surface protective layer is a cured product of an ionizing radiation curable resin composition.
The decorative member according to any one of claims 1 to 3, wherein the base sheet is a colored resin sheet.
The decorative member according to any one of claims 1 to 4, wherein the decorative sheet does not contain carbon black.
The decorative member according to any one of claims 1 to 5, further comprising a resin layer between the decorative layer and the surface protective layer.
The decorative member according to any one of claims 1 to 6, wherein the adherend is at least one selected from a wooden member, a metal member, and a resin member.