JP2002276091A - Pseudo solar cell plate - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a simulated solar cell plate capable of imitating, in addition to a color tone and the like, a semi-metallic luster, an appearance of a condensing lens, and the like close to an actual solar cell plate. SOLUTION: At least a surface plate 10 made of a transparent material, a decorative layer 20 having a pattern imitating a solar cell with a transparent colored ink of blue color tone, and a metal thin film layer 30 are laminated in order from the surface on a pseudo solar cell plate P. Configuration. Further, a concavo-convex pattern imitating a condensing lens shape or a polycrystalline gloss pattern may be formed on the surface plate, the decorative layer, the metal thin film layer, or the like.
The decorative layer and the metal thin film layer may be formed on the base sheet, or the adhesive layer may be used between the layers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simulated solar cell plate which imitates a solar cell plate (solar cell panel), and is preferably used side by side with a real solar cell plate.

[0002]

2. Description of the Related Art In recent years, from the viewpoint of global environmental protection, a solar system using a solar cell plate that converts sunlight energy into electric power as clean energy has been attracting attention. Are increasing.

[0003]

However, the required area of the solar cell plate for the required amount of power supply and the area of the installation surface do not usually coincide with each other, and the occurrence of an empty surface is avoided. Did not. This is because, if the installation is performed on the entire surface of the installation surface, the required energy or more is generated or the cost becomes high. Conventionally, FIG.
As shown conceptually in the above, no treatment is performed on the empty surface when the solar cell plate S is installed and constructed on the roof, the roof material such as tiles is exposed, and the solar cell plate S The appearance with the roof tile K was inconsistent, which caused a sense of discomfort in the landscape. Therefore, in Japanese Patent Application Laid-Open No. 11-256773,
A pseudo solar cell plate is proposed in which a decorative layer having a pattern imitating the appearance of a solar cell is printed on the back surface of a transparent resin plate with a printing ink. As shown in the conceptual diagram of FIG. 4, a dummy panel (pseudo solar cell plate P) having a design similar in appearance to an empty space is constructed using the pseudo solar cell plate, thereby real solar cell plate S The exterior of the roof, walls, etc. where the construction is performed is the same, and the landscape can be improved.

[0004] However, only by printing with printing ink,
It has been impossible to sufficiently reproduce the appearance of a solar cell that is blue-black and has a semimetallic luster. In particular, in the case of a solar cell plate using polycrystalline silicon, as shown in FIG. 7, the surface is made up of a large number of polygonal (unit) closed regions adjacent to each other and gathering. It is said that the gloss in each closed area of the surface changes in response to the change in the combination of the direction of the incident light (illumination light or sunlight) and the direction of the observer, which are different from each other. The appearance of. Alternatively, there is generally a solar cell or a solar cell plate in which a condensing lens shape is formed on a transparent plate for protecting the surface thereof. Such a lens shape has gloss (reflectivity of sunlight) and its angle. In terms of the dependency (the direction of incidence of sunlight and the direction of the observer), it contributes to the appearance, but it cannot be reproduced only by the printed picture.

That is, an object of the present invention is to provide a set of closed polygonal regions having a characteristic glossiness of polycrystalline silicon in addition to a color tone, etc. An object of the present invention is to provide a simulated solar cell plate that can imitate the appearance of a body or the appearance of a condenser lens.

[0006]

In order to solve the above-mentioned problems, a pseudo solar cell plate of the present invention comprises, in order from the surface, at least a surface plate made of a transparent material and an ink transparently colored with a blue color tone. , And a decorative layer having a pattern imitating a solar cell, and a metal thin film layer were laminated in this order.

[0007] By adopting such a configuration, the reflected light from the metal thin film layer below the decorative layer can express a metallic luster that cannot be expressed by a mere printed picture, and further enhances the real sunshine. The appearance can be similar to the appearance of the battery plate. Therefore, the entire surface on which the solar cell plate is laid, such as a roof or a wall, can be finished with the same appearance at low cost, and the scenery does not feel uncomfortable.

Further, the pseudo solar cell plate of the present invention further comprises an uneven pattern formed on either the front or back surface of the front plate, the decorative layer, or the metal thin film layer.
The concavo-convex pattern has line grooves in a plurality of polygonal unit closed regions adjacent to each other, and in the unit closed regions adjacent through sides, the directions of the line grooves are mutually different. The configuration was different.

With such a configuration, the surface is formed of a set of a number of adjacent polygonal closed regions by its unique linear groove, and each closed region is set in accordance with the combination of the incident direction and the observation direction. The appearance due to the gloss inherent in a polycrystalline material such as polycrystalline silicon in which the gloss of the material changes can be reproduced.
Therefore, it is possible to express an appearance more similar to the appearance of a real solar cell plate particularly made of polycrystalline silicon.

In addition, the pseudo solar cell plate of the present invention further has a converging lens shape on either the front or back surface of the front plate, the decorative layer, or the metal thin film layer. The configuration is such that an uneven pattern is formed. With such a configuration, the appearance of the solar cell plate with a condensing lens can also be patterned, and the entire surface of the solar cell plate laying surface such as a roof or a wall can be laid for the solar cell plate with a condensing lens. Can be finished to the same appearance at low cost, and the scenery does not feel uncomfortable.

[0011] The pseudo solar cell plate of the present invention may further comprise a decorative layer formed on the front or back surface of a transparent base material sheet, or a metal thin film layer having a transparent base layer. The configuration adopts at least one of the following modes: formed on the back surface of the material sheet, or formed on the surface of the base material sheet with the metal thin film layer. With the configuration using such a base sheet, a pseudo solar cell plate that can be easily manufactured is obtained. For example, the material layer structure is such that the surface plate is made of a rigid and brittle glass or the like, and the decoration layer is difficult to directly form by a printing method or the like, or the material layer where the metal thin film layer is difficult to form directly on the decoration layer. This is because, even in the configuration and the like, the decorative layer and the metal thin film layer are once formed on the base material sheet, and then laminated with another constituent layer such as a surface plate with an adhesive or the like.

Further, the pseudo solar cell plate of the present invention has a structure in which a back plate is further laminated on the most rear surface of any of the above structures. By adopting such a configuration, even if the back surface of the pseudo solar cell plate is damaged during the installation, it is possible to prevent the decoration layer and the metal thin film layer from being damaged, and to prevent the appearance from being impaired. In addition, it is possible to improve the moisture-proof property and to increase the mechanical strength required as a pseudo solar cell plate.

[0013] The pseudo solar cell plate of the present invention may further comprise an adhesive layer at one or more positions among the respective layers, and the adhesive layer on the surface side of the metal thin film layer. Has a transparent configuration. With such a configuration, the adhesion between the layers is improved, and peeling (interlayer) during use can be prevented. Further, in the case of using the base sheet or the like, the pseudo solar cell plate can be manufactured by dividing the pseudo solar cell plate into two or more sheets or plates and laminating the pre-manufactured ones, which can be easily manufactured. Become. Further, by making the adhesive layer on the surface side of the metal thin film layer transparent, the light reflected by the metal thin film layer can be effectively used, and the appearance of a real solar cell can be more approximated.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

[Overview] First, the layered structure of the pseudo solar cell plate of the present invention is formed by laminating a surface plate, a decorative layer, and a metal thin film layer in this order at least from the front side. The pseudo solar cell plate P in the mode illustrated in FIG. 1A is the simplest example in terms of the layer structure, and the surface plate 1 made of a transparent material is sequentially arranged from the surface side.
0, a decorative layer 20 partially formed in a pattern on the back surface of the front plate 10, a metal thin film layer 30 formed only on the decorative layer, and the decorative layer 20 has a blue color tone. It is a configuration having a pattern simulating a solar cell with transparently colored ink. In the present specification, the side that is the sun side is defined as the front surface (side), and the side opposite to the sun side (the side of the roof, wall surface, etc.) is defined as the back surface (side). The design of the decoration layer 20 is a design in which a plurality of solar cells are arranged, for example, as shown in the plan view of FIG. In addition, as shown in FIGS. 1 (A) and 1 (B), the decorative layer is partially formed into a desired pattern to be imitated.
It may be formed uniformly over the entire surface.

Further, as a pseudo solar cell plate, the base sheet 50, the adhesive layer 40, and / or
Alternatively, a back plate 70 or the like is added [see FIG.
If desired, the desired pattern may be formed on the desired layer.
0 is added (see FIG. 2E). In addition, each layer may include multiple layers.

Further, as the pseudo solar cell plate, as shown in FIG. 8, a concave / convex pattern (detailed contents will be described later) in which a linear groove is fitted in a polygonal unit closed region is shown in FIG. By employing a configuration formed on a face plate, a decorative layer, or the like, it is possible to reproduce gloss peculiar to the surface of a solar cell made of a polycrystalline material such as polycrystalline silicon. Alternatively, if a concavo-convex pattern imitating the shape of a condensing lens is formed on a surface plate, a decorative layer, a metal thin film layer, or the like, the appearance of the condensing lens is approximated by a pseudo solar cell plate. It can be.

In the structure illustrated in FIG. 1A, the decorative layer may be formed directly on the back surface of the front plate. However, the decorative layer may be formed on another support and then laminated on the back surface of the front plate. Is also good.
For example, a laminated sheet in which a decorative layer is formed on a transparent base sheet is laminated on a surface plate by a transparent adhesive layer or the like. The same applies to the metal thin film layer. This provides advantages such as facilitating the manufacture of the simulated solar cell plate.
Further, on the back surface side of the pseudo solar cell plate, a back plate may be laminated to further improve the back surface strength against scratches and the like and the mechanical strength.

Hereinafter, each layer will be described in more detail.

[Surface Plate] The surface plate 10 is preferably made of a material having sufficient weather resistance and transparency. Examples of such a material include a resin plate and a glass plate. As the resin plate, for example, a resin obtained by adding an ultraviolet absorber and / or a light stabilizer similar to those exemplified in the decorative layer described later to a resin such as an acrylic resin, a fluororesin, or a polycarbonate resin, if necessary. Is used. The addition of an ultraviolet absorber or a light stabilizer is preferable in that the weather resistance of the surface plate can be improved when the surface plate is made of resin.
The thickness of the surface plate is usually about 50 to 5,000 μm.

As the acrylic resin, for example, polymethyl (meth) acrylate, polybutyl (meth) acrylate, methyl (meth) acrylate-butyl (meth) acrylate copolymer, methyl (meth) acrylate-styrene copolymer, etc. (However, (meth) acrylate means acrylate or methacrylate) alone or as a mixture of two or more. Further, as the fluororesin, polyvinyl fluoride, polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer, or the like is used. In the case of an acrylic resin, for example, a resin other than the acrylic resin, for example, a resin mixed with a fluororesin such as polyvinylidene fluoride may be used as the auxiliary component resin.

[Decoration Layer] The decoration layer 20 is a layer formed by simulating a pattern of a solar cell made of polycrystalline silicon, single crystal silicon or the like in a simulated manner. It is formed using an ink obtained by mixing an agent and other additives that are added as necessary.
Further, the decorative layer has a transparent color that is at least as large as does not impede the expression of the semi-metallic luster of a real solar cell by transmitting the incident light to the metal thin film layer below and the reflected light from the layer. I do.

As the blue colorant, for example, inorganic pigments such as ultramarine blue, cobalt blue and cerulean blue, and organic pigments (or dyes) such as phthalocyanine blue and indaslen blue RS are used. In addition, an inorganic pigment is preferable from the viewpoint of the weather resistance of the colorant. Usually, the hue, lightness, and / or saturation of the above-described blue-based colorant are further adjusted, and the blue-based colorant is adjusted so as to approach a color tone similar to that of a real solar cell plate. A coloring agent other than the agent is added. Examples of coloring agents added for this purpose include, for example, inorganic pigments such as carbon black, iron black, titanium white, zinc white, graphite, titanium yellow, red iron oxide, and silver vermilion; and organic pigments such as isoindolinone yellow and quinacridone red. (Or a dye). Also, these colorants are preferably inorganic pigments in terms of weather resistance. Alternatively, aluminum,
A metal pigment composed of flaky foil powder such as brass, pearlescent (pearl) pigment composed of flaky foil powder such as titanium dioxide-coated mica, and basic lead carbonate may be used in combination.

The blue color tone of the decorative layer is different depending on the solar cell whose appearance is to be imitated, but is generally dark blue, dark purple, or a similar color tone. In the vicinity, the brightness is generally low (dark color).

Examples of the binder resin include acrylic resin, vinyl chloride-vinyl acetate copolymer,
A urethane resin or the like is used alone or as a mixture of two or more thereof.

Examples of the acrylic resin include polymethyl (meth) acrylate, polybutyl (meth) acrylate, methyl (meth) acrylate-butyl (meth) acrylate copolymer, and methyl (meth) acrylate-styrene copolymer. Acrylic resin (however, (meth) acrylate means acrylate or methacrylate) or monomer 1 such as methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, octyl (meth) acrylate Species or two or more species, 2-hydroxyethyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth)
An acrylic resin or the like as an acrylic polyol obtained by copolymerizing a (meth) acrylate having a hydroxyl group in a molecule such as an acrylate alone or 2
Mix and use more than one species.

As the vinyl chloride-vinyl acetate copolymer, the vinyl chloride-vinyl acetate copolymer usually has a vinyl acetate content of about 5 to 20% by mass and an average degree of polymerization of about 350 to 900. Used.

As the urethane resin, a two-component curable urethane resin or a thermoplastic urethane resin is used. The two-component curable urethane resin is a urethane resin containing polyol as a main component and isocyanate as a crosslinking agent (curing agent). The polyol has two or more hydroxyl groups in the molecule, and examples thereof include polyethylene glycol, polypropylene glycol, acrylic polyol, polyester polyol, polyether polyol, and polycarbonate polyol.
As the isocyanate, a polyvalent isocyanate having two or more isocyanate groups in a molecule is used. For example, aromatic isocyanates such as 2,4-tolylene diisocyanate, xylene diisocyanate, 4,4'-diphenylmethane diisocyanate, or
Use of an aliphatic (or alicyclic) isocyanate such as 1,6-hexamethylene diisocyanate, isophorone diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated diphenylmethane diisocyanate, or an adduct or a polymer of the above various isocyanates. Can also. For example, adduct of tolylene diisocyanate, trimer of tolylene diisocyanate (trimer)
Etc. Among these isocyanates, aliphatic (or alicyclic) isocyanates are preferable from the viewpoint of weather resistance. The thermoplastic urethane resin is made of a linear polymer obtained by urethane-bonding a divalent polyol and a divalent isocyanate.

The above-mentioned other additives include, for example, ultraviolet absorbers, light stabilizers, heat stabilizers, antioxidants,
Examples include surfactants, fillers, and flame retardants.

Examples of the ultraviolet absorber include, for example, organic compounds such as 2- (2′-hydroxy-3 ′,
5'-di-tert-butylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3'-t
tert-butyl-5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3'-
tert-amyl-5'-isobutylphenyl) -5
Chlorobenzotriazole, 2- (2'-hydroxy-
3'-isobutyl-5'-methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3 '
-Isobutyl-5'-propylphenyl) -5'-hydroxyphenyl-5 such as 5-chlorobenzotriazole
-Chlorobenzotriazole-based ultraviolet absorbers, 2-
2′-hydroxyphenylbenzotriazole-based ultraviolet absorption such as (2′-hydroxy-3 ′, 5′-di-tert-butylphenyl) benzotriazole and 2- (2′-hydroxy-5′-methylphenyl) benzotriazole Benzotriazole UV absorbers such as agents,
2,2'-dihydroxybenzophenones such as 2,2'-dihydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone and 2,2 ', 4,4'-tetrahydroxybenzophenone UV absorbers, 2-hydroxybenzophenone-based UV absorbers such as 2-hydroxy-4-methoxybenzophenone and 2,4-dihydroxybenzophenone,
Salicylate-based ultraviolet absorbers such as phenyl salicylate and 4-t-butyl-phenyl-salicylate;
Cyanoacrylate ultraviolet absorbers such as -ethyl-hexyl-2-cyano-3,3-diphenylacrylate, ethyl-2-cyano-3,3-diphenylacrylate, octyl-2-cyano-3,3-diphenylacrylate Etc. can be used. As the inorganic compound, ultraviolet absorbers of inorganic oxides such as zinc oxide, iron oxide, titanium oxide, and cerium oxide having a particle size of 1 μm or less, and more preferably 0.2 μm or less in terms of visible light transparency. Etc. can be used.

It should be noted that the inorganic oxide-based ultraviolet absorber does not deteriorate due to light or heat, and thus maintains the ultraviolet absorption ability for a long period of time. In addition, unlike organic UV absorbers and light stabilizers, performance degradation can be prevented without bleeding.

These inorganic oxides are preferably used in the form of fine powder having a particle size of 1 μm or less, and have sufficient transparency to visible light so that light reflected by the metal thin film layer below the decorative layer can be obtained. １ ／ or less of the wavelength of visible light to be possessed, that is, 200 nm or less, more preferably 100 n
m, particularly preferably in the range of 8 to 30 nm. By using such fine powder,
Even if the inorganic oxide is contained in a relatively large amount, the decorative layer can have excellent ultraviolet absorbing ability so that the pattern of the decorative layer is not clouded without impairing the transmittance of visible light.

Among the inorganic oxide-based fine powders, when a vinyl chloride-vinyl acetate copolymer is used in combination as a binder resin for the decorative layer, in particular, in addition to the acrylic resin, as a sub-component resin, the light-irradiation during the light irradiation is difficult. Cerium oxide is the best in terms of the effect of preventing discoloration, zinc oxide is second, and titanium oxide is second.

When cerium oxide is used as the inorganic oxide, the cerium oxide to be added to the ink may be in the form of a simple powder. Since dispersion is difficult and secondary aggregation is likely to occur, a known easily dispersible surface treatment for obtaining good dispersibility may be performed, or JP-A-1-306.
As described in JP-A-435-435, it is preferable to use the sol or sol powder in the state of being added to the ink.

It is preferable to use a powder of such cerium oxide in a crystalline state. The reason is that in the case of amorphous, heat during the production of the simulated solar cell plate, or exposure to sunlight during use, repeated cold in the outdoors, etc.
This is because crystallization proceeds with time, and the transparency of the resin binder may change, and the color tone of the decorative layer may change. Do). In addition, cerium oxide includes cerous oxide and ceric oxide, but ceric oxide is more preferable because it has the instability of being gradually oxidized to ceric oxide.

It is also possible to use a mixture of cerium oxide, iron oxide, titanium oxide and the like as an inorganic ultraviolet absorber.

The amount of the ultraviolet absorbent of an organic compound such as a benzotriazole compound is in the range of 0.1 to 2% by mass, more preferably 0.5% by mass or more, based on the total amount of the added resin. Is preferred. If it is less than 0.1% by mass, sufficient weather resistance cannot be obtained, and if it exceeds 2% by mass, the cost becomes high, and it may be difficult to completely prevent whitening upon exposure to sunlight.

The amount of the inorganic ultraviolet absorber such as cerium oxide fine powder added is 0.1 to the total amount of the added resin.
The range of 2 to 2% by mass is preferred. Fine particle size of 200n
If the molecular weight is less than m, transparency to visible light can be ensured, so that a blending of up to 1% by mass is possible. If the content is less than 0.1% by mass, a sufficient ultraviolet absorbing effect cannot be obtained, and if it exceeds 2% by mass, the layer tends to become brittle, and physical properties such as adhesion to other layers are deteriorated, which is preferable. Absent.

In order to further improve the weather resistance,
It is preferable to add a light stabilizer other than the ultraviolet absorber.
Examples of the light stabilizer include a nickel-based ultraviolet light stabilizer and the like, and typically, a hindered amine-based light stabilizer is preferably added. As hindered amine light stabilizers, bis-
Sebacate radical scavengers such as (2,2,6,6-tetramethyl-4-piperidyl) sebacate and bis- (N-methyl-2,2,6,6-tetramethyl-4-piperidyl) sebacate; Dimethyl succinate-1- (2-hydroxyethyl) -4-hydroxy-2,2,6,6-
Tetramethyl-4-piperidine condensates and other compounds disclosed in, for example, Japanese Patent Publication No. 4-82625 are used.

The content of the light stabilizer is in the range of 0.1 to 2% by mass relative to the whole resin, and more preferably 0.1 to 2% by mass.
It is preferably at least 5% by mass. If the amount is less than this, the effect of improving the weather resistance is not obtained, and if it is more than this, the cost is increased, and when the pseudo solar cell plate is formed as a molded product (non-planar plate), the moldability is reduced.

In the combination of the above-mentioned ultraviolet absorber and this light stabilizer, particularly from the viewpoint of compatibility between weather resistance and moldability, a benzotriazole-based ultraviolet absorber and a hindered amine-based light stabilizer are used. Combinations using sebacate radical scavengers are preferred. In addition, the addition amount of the benzotriazole-based ultraviolet absorber in combination is 0.1.
It is preferable that the amount is 5% by mass to 2% by mass and the sebacate radical scavenger as the light stabilizer is 0.5% by mass to 2% by mass. Among the hindered amine light stabilizers, sebacate-based radical scavengers are easily available but low molecular weight light stabilizers. Lead-out to the surface of the face plate (when the surface plate is a resin plate), the effect of improving the weather resistance by the light stabilizer can be efficiently brought out without giving an adverse effect such as whitening the surface.

As a preferred combination, 2- (2'-hydroxy-3'-R-5'-R ') phenylbenzotriazole [where R and R' are alkyl groups] Among the hindered amine light stabilizers, bis- (NR-2,2,6,6-tetramethyl-4-piperidyl) sebacate is used as the sebacate radical scavenger [where R is an alkyl group, etc.] Is mentioned.

The filler added to the decorative layer as other additives includes, for example, particles having a particle size of about 0.1 to 10 μm, such as calcium carbonate, barium sulfate, and silica.

By the way, the pattern of the decorative layer is changed according to the type of the solar cell plate to be imitated, for example, as shown in FIG. 1 (B), a semicircle (or a large number of these are arranged), or a regular triangle. , Polygons such as regular squares, hexagons, and other shapes (or a large number of such polygons) (see FIGS. 1C and 1D), and are preferably solid over the entire surface. (Note that, in FIG. 1B, a plurality of vertical lines indicated by the symbol m are printed and formed by imitating an electrode pattern.) Alternatively, in some cases, in addition to the pattern of only each solar cell, It is also preferable to add a pattern imitating the shape of an electrode, a wiring, an insulator, or the like that electrically connects the solar cells in series or in parallel.

In particular, a polycrystalline body (layer) such as polycrystalline silicon
In the case of a solar cell made of e, as shown in FIG. 7, the surface appearance is such that a plurality of single crystal particles f (unit closed area g) having various polygons in size and shape are laid out in a plane without gaps. Present. Each unit closed region g has a different gloss, and each time the combination of the incident angle direction of the illumination light and the line of sight of the observer is changed, the unit closed region g becomes high gloss and becomes low gloss. The combination of unit closed areas also changes. The gloss pattern has anisotropy and angle dependence. As a preferable mode for satisfactorily reproducing the appearance, a pattern similar to the surface of a solar cell composed of a real polycrystalline layer is printed. More preferably, as described later, a concavo-convex pattern formed by fitting a linear groove in each unit closed region of an aggregate of a plurality of polygonal regions partitioned by a closed contour may be combined. In order to make a plate for printing such a pattern, it is necessary to make a plate based on an image obtained by photographing a solar cell surface (as shown in FIG. 7) composed of a real polycrystalline layer, or by using computer graphics. According to such a method, a plurality of polygonal aggregates similar to the appearance of the solar cell surface as shown in FIG. 7 are subjected to plate making based on an image created by artificially drawing.

The decorative layer can be formed by a known printing method such as gravure printing, offset printing, silk screen printing, flexographic printing and the like.

As described above, the actual solar cell includes:
When imitating an electrode or wiring for taking out the generated power and guiding it to a load, for example, a method of imitating by the following method (1) or (2) can be mentioned [symbol of FIG. m
reference〕. (1) Metal pigment ink printing method: A desired electrode / wiring pattern is printed using an ink containing a metal pigment. Examples of the metal pigment include pigments made of scale-like foil pieces of a metal such as aluminum, brass, nickel, and chromium. The average particle size of the foil piece is about 5 to 20 μm. (2) Partial vapor deposition method: As a typical method, a water-soluble ink composed of a water-soluble resin such as polyvinyl alcohol or starch is printed only on the unnecessary portion of the metal thin film, and then over the entire surface including the water-soluble ink layer. A method of depositing a thin film of a metal such as aluminum, chromium, etc., followed by washing with water to dissolve the water-soluble ink and, at the same time, removing the thin metal film immediately above the water-soluble ink.

[Metal Thin Film Layer] The metal thin film layer 30 is a layer formed of a metal such as aluminum, nickel, titanium, silicon, and chromium in a thickness of about 300 to 10,000 °. As a forming method, a known method such as vacuum deposition, sputtering, electroless plating, and adhesion of a metal foil can be adopted.

[Concavo-convex pattern] As a typical example of the concavo-convex pattern 60, there is a concavo-convex shape for imitating the appearance due to the concavo-convex shape of a converging lens formed on the surface of a concentrating solar cell or the like. The shape of the concavo-convex pattern varies depending on the solar cell to be imitated. For example, a convex lens whose plan view shape is a circle, an ellipse, a triangle, a square, a rectangle, a hexagon (see FIG. 3B), or the like. In which the unit lenses are arranged two-dimensionally. The height difference (altitude difference) of the concavo-convex pattern is not necessarily required to be the same as that of a real product.
m or more is required.

The formation of the concavo-convex pattern is performed by forming a base sheet supporting the surface plate or the decorative layer or the metal thin film layer from a thermoplastic resin, and shaping the base sheet by a known hot embossing method. Representative. In the hot embossing method, the surface plate or the base sheet is heated to a softening point (evaluated by Vicat softening point or the like) or higher and lower than a melting point (or a melting temperature) to be softened. A softened surface plate or base sheet is pressed using an embossing plate (pressing die) made of metal or the like and having the same shape of the desired unevenness on the surface and the shape of the inverse unevenness, and the desired unevenness is formed. This is a method in which the shaped irregularities are fixed and fixed while being shaped and cooled and solidified.

As another typical example of the concavo-convex pattern, FIG. 8 (A) shows a preferable embodiment for reproducing the anisotropy and angle dependence of the gloss pattern of a solar cell made of polycrystal.
And an embodiment in which a concavo-convex pattern 60 as shown in FIG. FIG. 8B is a cross-sectional view taken along the line XX in the plan view of FIG.

Such a concavo-convex pattern is formed by arranging linear grooves h in a large number of unit closed areas g having different sizes and shapes.
The unit closed region g is a closed region surrounded by a polygonal closed contour line i. These are variously changed in size and shape and connected adjacent to each other to fill a plane having a desired area without gaps, and to arrange the linear groove h in each unit closed region g. The linear streaks h are shown in FIG.
As shown in (A), linear convex ridges and linear concave ridges are alternately arranged adjacent to each other. And a closed contour i
Are arranged at an angle such that the directions of the linear grooves h in each unit closed area are different from each other. The degree of the angle difference must be 5 ° or more in order for adjacent unit closed areas to be clearly visible with different gloss in the same combination of the illumination light incident direction and the line-of-sight direction. Is preferred. Also,
It is sufficient that there are at least four types of angles of the parallel groove for the same reason as the four-color problem of map painting in the topology.

FIG. 8B shows the cross-sectional shape of the linear groove h.
The width a of the ridge and the width b of the ridge are each about 1 to 100 μm, and the height difference d between the ridge and the ridge is
Is about 1 to 100 μm.

Such a concavo-convex pattern is preferably combined with the pattern of the above-mentioned polygonal aggregate (FIG. 7). By doing so, it is possible to satisfactorily reproduce the anisotropy and angle dependence of a specific gloss pattern of a solar cell made of a real polycrystal (layer). In addition, each of the unit closed regions of the pattern as shown in FIG. 7 and the corresponding unit closed region of the concavo-convex pattern in FIG.
In addition, it is preferable to synchronize (register) the positions of the unit closed regions corresponding to both the pattern and the concavo-convex pattern.

Further, in the case where the uneven pattern is formed, as a preferable mode for making the uneven pattern formed between the layers of the pseudo solar cell which is a laminate sufficiently visible, FIG. As shown in FIG. 2H, a configuration in which an uneven pattern 60 is formed on the surface side of the metal thin film layer 30 can be given.

[Examples of Various Layer Configurations] As typical examples of the specific layer configuration of the pseudo solar cell, FIGS.
The configuration of each pseudo solar cell plate P shown in the cross-sectional view of (I) is given. In these, the surface plate 10, the decorative layer 20,
As components other than the metal thin film layer 30 and the uneven pattern 60,
The adhesive layers 40 to 42, the base sheet 50, the back plate 70, and the like are illustrated. However, of course, the present invention is not limited to the embodiment shown in FIG. Next, each layer configuration is further described in FIG.

[Base Material Sheet] If desired, a base material sheet 50 (in FIG. 3, a base material sheet 50) is formed to support and form one or more of a decorative layer, a metal thin film layer, and a concavo-convex pattern. Sheets 51 to 53) may be provided. As the material of the base sheet, a thermoplastic resin, which has a certain degree of weather resistance, is preferably selected. Naturally, the material of the base sheet located on the surface side of the metal thin film layer is transparent (visible light transmittance is preferably about 80% or more).
The right one.

Specifically, for example, polymethyl (meth)
Acrylic resin such as acrylate, polybutyl (meth) acrylate, methyl (meth) acrylate-butyl (meth) acrylate copolymer, methyl (meth) acrylate-styrene copolymer [where (meth) acrylate is acrylate or methacrylate Or polyethylene terephthalate, polybutylene terephthalate, ethylene-terephthalate-isophthalate copolymer, polyethylene naphthalate, polyester-based thermoplastic elastomer, polyester resin such as amorphous polyester, polycarbonate resin, polyvinyl chloride resin, etc. Is mentioned. If necessary, the above-mentioned UV absorber and / or light stabilizer are added to such a resin.
The thickness of the base sheet is usually about 20 to 200 μm.

As the polyester-based thermoplastic elastomer, a high-crystalline, high-melting aromatic polyester is used for the hard segment, and an amorphous polyether having a glass transition temperature of -70 ° C. or less is used for the soft segment. For example, polybutylene terephthalate is used for the high crystalline, high melting point aromatic polyester, and polytetramethylene glycol is used for the amorphous polyether. In addition, typical examples of the amorphous polyester include an ethylene glycol-1,4-cyclohexanedimethanol-terephthalic acid copolymer.

[Adhesive Layer] If desired, an adhesive layer (in FIG. 2, adhesive layers 40 to 4) may be used to enhance the adhesion between the respective layers.
2, in FIG. 3, adhesive layers 41 to 44) may be provided. Naturally, as the adhesive layer (for example, the adhesive layers 40 to 1 in FIGS. 2A to 2C and the adhesive layers 41 to 43 in FIG. 3 and the like) located on the surface side of the metal thin film layer, Use a transparent adhesive. As the material of the adhesive used for the adhesive layer, an appropriate material may be selected from publicly known ones according to the material of the two layers to be bonded, but is generally good for each layer configuration illustrated in FIG. As a two-part curable urethane resin, an epoxy resin,
Examples include an ethylene-vinyl acetate copolymer (EVA) and an acrylic resin. The coating amount of the adhesive may be appropriately determined, but is usually about 5 to ²⁰ g / m ² .

The two-component curable urethane resin is a urethane resin containing polyol as a main component and isocyanate as a crosslinking agent (curing agent). As a polyol,
Those having two or more hydroxyl groups in the molecule, for example, polyethylene glycol, polypropylene glycol, acrylic polyol, polyester polyol, polyether polyol, polycarbonate polyol and the like are used. As the isocyanate, a polyvalent isocyanate having two or more isocyanate groups in a molecule is used. For example, aromatic isocyanates such as 2,4-tolylene diisocyanate, xylene diisocyanate, 4,4'-diphenylmethane diisocyanate, or 1,6-hexamethylene diisocyanate, isophorone diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated diphenylmethane diisocyanate, etc. Aliphatic (or alicyclic) isocyanate, or an adduct or multimer of the above various isocyanates can also be used. For example, an adduct of tolylene diisocyanate, a trimer of tolylene diisocyanate (tr
imer) and the like. In the case of an isocyanate for an adhesive, an aliphatic (or alicyclic) isocyanate is more preferable from the viewpoint of weather resistance. When a thermoplastic urethane resin is used for the adhesive, the resin is
It consists of a linear polymer obtained by urethane-bonding a divalent polyol and a divalent socyanate.

[Back Plate] The back plate 70 is preferably provided from the viewpoint of protecting the back surface from scratches, improving the moisture resistance of the back surface, and improving the mechanical strength. In addition, the total thickness of the pseudo solar cell plate can be adjusted on the back plate. As such a back plate,
It is only necessary to use a plate material corresponding to the intended functions.
The back plate may be transparent, but unlike the front plate, transparency is not required. Further, the material of the back plate does not need to have weather resistance as high as the front plate, but it is preferable that the material has weather resistance.

As the back plate as described above, in addition to the various materials described above for the front plate, a resin (polyester resin, epoxy resin, urethane resin, vinyl chloride resin, polyolefin resin, etc., or a resin such as these) may be used. Reinforced with fiber such as glass fiber (so-called FR
P), etc.), metals (iron, aluminum, stainless steel, etc.),
Plates made of opaque or transparent materials such as ceramics (glass, earthenware, pottery, porcelain, setware, enamel, etc.) and wood (single veneers, plywood, particleboard, fiberboard, laminated wood, etc.) can also be used. . The thickness of the back plate is usually about 50 μm to 10 mm.

Here, the structure and the manufacturing method of each of the pseudo solar cell plates P having the typical structure illustrated in FIG. 2 will be described.

First, the pseudo solar cell plate P shown in FIG.
Surface plate 10 / adhesive layer 40 / decorative layer 2 in order from the front side
0 / base sheet 50 / metal thin film layer 30. In this production, for example, after forming the decoration layer 20 on the front surface of the base sheet 50 and forming the metal thin film layer 30 on the back surface,
It is manufactured by laminating on the back surface of the front plate 10 via an adhesive layer 40.

Next, the pseudo solar cell plate P shown in FIG.
The structure is composed of a surface plate 10 / adhesive layer 40 / base sheet 50 / decorative layer 20 / metal thin film layer 30 in order from the front side. This manufacturing is performed, for example, by forming the decorative layer 20 and the metal thin film layer 30 on the back surface of the base sheet 50 in this order, and then laminating the back surface of the front plate 10 via the adhesive layer 40.

Next, the pseudo solar cell plate P shown in FIG.
Surface plate 10 / adhesive layer 41 / decorative layer 2 in order from the front side
0 / base sheet 50 / metal thin film layer 30 / adhesive layer 42 /
This is a configuration including the back plate 70. This manufacturing, for example,
After the decorative layer 20 is formed on the front surface of the base sheet 50 and the metal thin film layer 30 is formed on the back surface, an adhesive layer 41 is provided between the front plate 10 and the back plate 70, It is manufactured by laminating and laminating the adhesive layer 42 on the back side of the material sheet.

Next, the pseudo solar cell plate P shown in FIG.
Surface plate 10 / adhesive layer 41 / decorative layer 2 in order from the front side
0 / base sheet 50 / adhesive layer 42 / metal thin film layer 30. This production is performed, for example, by using the base sheet 5
No. 0, a sheet having a decorative layer 20 formed on the surface thereof, and a metal thin film layer 30 in the form of a single-layer metal foil are prepared, and these are arranged in the order and positional relationship as shown in FIG. It is manufactured by laminating via an adhesive layer 41 and an adhesive layer 42.

Next, the pseudo solar cell plate P shown in FIG.
Surface plate 10 / adhesive layer 40 / decorative layer 2 in order from the front side
0 / substrate sheet 50 / metal thin film layer 30, and the decorative layer 20 has a concavo-convex pattern 60 formed thereon. This production is performed, for example, by using a base sheet 50 made of a thermoplastic resin.
After the decorative layer 20 is formed on the surface of the sheet and the metal thin film layer 30 is formed on the back side, the concavo-convex pattern 60 is formed on the front side of the sheet by a hot embossing method to form an embossed sheet. It is manufactured by laminating on the back surface of the front plate 10 via an adhesive layer 40.

Next, the pseudo solar cell plate P shown in FIG.
In order from the front side, the surface plate 10 / adhesive layer 41 / base sheet 50 / decoration layer 20 / metal thin film layer 30 / adhesive layer 42 /
It is composed of a back plate 70 and has a configuration in which the uneven pattern 60 is formed on the surface of the base sheet. In this production, for example, the decorative layer 20 is formed on the back surface of the base sheet 50 made of a thermoplastic resin.
After the metal thin film layer 30 is formed in this order, an embossed pattern 60 is formed on the surface side of the sheet by a hot embossing method to form an embossed sheet.
0 and the back plate 70, the adhesive layer 41 on the front plate side,
It is manufactured by stacking and laminating the adhesive layer 42 on the back plate side.

Next, the pseudo solar cell plate P shown in FIG.
The surface plate 10 / decorative layer 20 / metal thin film layer 30 / adhesive layer 40 / back plate 70 are arranged in this order from the front surface side. In this production, for example, a decorative layer 20 and a metal thin film layer 30 are formed in this order on the back surface of a front plate 10 made of a thermoplastic resin, and then the uneven pattern 6 is formed on the front surface side of the sheet by a hot embossing method.
After shaping 0, the front plate is manufactured by laminating the back plate 70 with the adhesive layer 40 interposed therebetween.

Next, the pseudo solar cell plate P shown in FIG.
A configuration in which, from the front side, a surface plate 10 / decorative layer 20 / metal thin film layer 30 is formed in order, and a concave / convex pattern 60 is formed on the back surface of the surface plate 10, the decorative layer 20, and the metal thin film layer 30. It is. In this manufacturing, for example, the decoration layer 20 and the metal thin film layer 30 are formed on the back surface of the front plate 10 made of a thermoplastic resin.
Are formed in this order, and then the concave and convex pattern 60 is formed on the back side of the front plate by a hot embossing method.

Next, the pseudo solar cell plate P shown in FIG.
Surface plate 10 / adhesive layer 41 / decorative layer 2 in order from the front side
0 / metal thin film layer 30 / base sheet 50 / adhesive layer 42 /
The decorative layer 20 and the metal thin film layer 3
This is a configuration in which the concavo-convex pattern 60 is formed on 0. In this production, for example, the metal thin film layer 30 and the decorative layer 20 are formed in this order on the surface of a base sheet 50 made of a thermoplastic resin, and then the uneven pattern 60 is formed on the surface side of the sheet by a hot embossing method.
After forming into an embossed sheet, the embossed sheet is sandwiched between the front plate 10 and the back plate 70 with an adhesive layer 41 on the front plate side and an adhesive layer 42 on the back plate side. Then, it is manufactured by laminating.

Next, the pseudo solar cell plate P shown in FIG.
In order from the front side, the surface plate 10 / adhesive layer 41 / base sheet 51 / decoration layer 20 / base sheet 52 / metal thin film layer 30
/ Adhesive layer 42 / back plate 70 and decorative layer 20
In addition, a concavo-convex pattern 60 is formed on the metal thin film layer 30. In this production, for example, the decorative layer 20 is formed on the front surface of the base sheet 52 made of a thermoplastic resin, and the metal thin film layer 30 is formed on the back surface.
Is formed, the base sheet 51 is laminated on the front side of the sheet by thermal fusion, and at the same time, the uneven pattern 60 is extended from the rear side to the decorative layer 20 from the metal thin film layer 30 to the decorative layer 20 by the hot embossing method. After shaping into an embossed sheet, the embossed sheet is further placed between the front plate 10 and the back plate 70.
Adhesive layer 41 on the front plate side, adhesive layer 42 on the back plate side
Are sandwiched and laminated.

The above-described respective manufacturing methods for the respective layer configurations in FIG. 2 are merely examples, and the present invention is not limited thereto.

[Overall Shape of Pseudo Solar Cell Plate] The overall shape of the pseudo solar cell plate of the present invention is one of the shapes that is preferably the same as the shape of a real solar cell plate laid side by side. For example, in addition to a rectangular parallelepiped (flat plate) as shown in FIG. 1, a tile shape like a pseudo solar cell plate P shown in a perspective view of FIG. In addition, if the laying surface such as the roof is not an integral multiple of the size of the actual solar cell plate, a pseudo solar cell plate of the same shape and dimensions as the actual solar cell plate cannot completely fill the empty surface. In such a case, it is also preferable to cut and use an empty surface shape, for example, a triangle or a trapezoid.

[Laying] The simulated solar cell plates may be laid in the same manner as the actual solar cell plates laid in parallel, and are laid so as not to easily fall off due to their own weight, wind force, earthquake or the like. In the case where the tile has the same shape as that of the tile exposed on the empty surface, it is preferable to lay the tile in the same manner as the tile.

[0078]

The present invention will be described in more detail with reference to the following examples.

Embodiment 1 FIG. 8A is a plan view and FIG.
A pseudo solar cell plate having a concavo-convex pattern of linear grooves as shown in the cross-sectional view of (B) was produced as follows.

First, a polymethyl methacrylate was used as a main component, and a benzotriazole-based ultraviolet absorber was added.
8 mass% and a colorless transparent acrylic resin obtained by adding 0.8 mass% of a hindered amine radical scavenger as a light stabilizer, a 50 μm thick first base material sheet made of a 50 μm thick acrylic resin, Solar cell made of polycrystalline silicon with a deep blue ink using a coloring agent containing ultramarine blue and carbon black as a main component, which is a binder resin consisting of 1 part by weight and 2 parts by weight of a vinyl chloride-vinyl acetate copolymer Were gravure-printed on a decorative layer of a pattern in which a number of were arranged in a plane, to produce a blue pattern printed sheet.

Next, a 50 μm thick second base material sheet made of an acrylic resin having the same composition as the first base material sheet was vacuum-deposited with chromium on the surface side of the second base material sheet;
A blue embossed plate made of a chromium-plated copper plate was placed on the vacuum-deposited surface side at 120 ° C. At the same time, the two sheets are bonded by the hot press method, and at the same time, the concave and convex pattern of the linear groove as shown in FIGS. 8A and 8B is formed.
An embossed pattern sheet was produced. The concavo-convex pattern of the embossed pattern sheet was a concavo-convex pattern formed on the metal thin film layer.

The embossed pattern sheet is laminated between a front plate 10 and a back plate 70 made of transparent glass having a thickness of 5 mm via an adhesive sheet made of ethylene-vinyl acetate copolymer (EVA), A pseudo solar cell plate was obtained.

The appearance of the obtained pseudo solar cell plate had a metallic glossiness, color tone, and pattern similar to those of the actual solar cell plate. In addition, the metallic luster was close to that of a real solar cell and could not be obtained with a simulated solar cell plate simply printed. In addition to this, a gloss pattern having a characteristic anisotropy and angle dependence similar to that of other crystalline silicon as shown in FIG. 7 was well reproduced.

[Embodiment 2] A sectional view of FIG.
As shown in the plan view of (B), a pseudo solar cell plate P was produced as follows.

First, a polymethyl methacrylate as a main component, and a benzotriazole-based ultraviolet absorber 0.1% were used.
8% by mass and 0.8% by mass of a hindered amine radical scavenger as a light stabilizer, a 40 μm thick first base sheet 51 made of a colorless and transparent acrylic resin, A solar cell made of polycrystalline silicon with a deep blue ink using a coloring agent mainly composed of ultramarine blue and carbon black as a binder resin consisting of 2 parts by mass of vinyl chloride-vinyl acetate copolymer The decorative layer 20 having a pattern in which a number of cells were arranged in a plane was gravure printed to produce a blue pattern printing sheet.

Next, a flat embossing plate made of a chromium-plated copper plate was placed on the front side of a 125 μm-thick second base material sheet 52 made of an acrylic resin having the same composition as the first base material sheet at 120 ° C. for 1 minute. To form a fly-eye lens-shaped concavo-convex pattern 60 to produce an embossed pattern sheet.

Next, the blue pattern printed sheet, the embossed pattern sheet, and a 38 μm-thick third base sheet 53 made of a polyethylene terephthalate film on which chromium has been vacuum-deposited on the surface side are combined with a hot press machine. In this order, a transparent adhesive of a two-component curable urethane resin obtained by adding 8 parts by mass of 1,6-hexamethylene diisocyanate to 100 parts by mass of acrylic polyol, between the constituent layers (between the sheet and glass) ( Adhesive layer 41 to adhesive layer 44
3) is laminated between the front plate 10 and the back plate 70 made of transparent glass having a thickness of 3 mm, and a cross-sectional view as shown in FIG. 3A and a plan view as shown in FIG. A pseudo solar cell plate P was obtained. During lamination, the embossed pattern 60 of the embossed pattern sheet became the embossed pattern 60 of the decorative layer 20 formed on the blue pattern printed sheet.

The appearance of the obtained pseudo solar cell plate had a metallic glossiness, color tone, and pattern similar to those of the actual solar cell plate. In addition, the metallic luster was close to that of a real solar cell and could not be obtained with a simulated solar cell plate simply printed.

Example 3 As shown in the sectional view of FIG. 2I, a simulated solar cell plate P was manufactured as follows.

First, an ethylene glycol-1,4-cyclohexanedimethanol-terephthalic acid copolymer was added to 0.8% by mass of a benzotriazole-based ultraviolet absorber and 0.8% of a hindered amine-based radical scavenger as a light stabilizer.
The base sheet 50 having a thickness of 50 μm made of a colorless and transparent amorphous polyester resin to which the above-mentioned composition was added was prepared. A metal thin film layer 30 is formed on the surface side of the base sheet 50 by vacuum vapor deposition of chromium. On the metal thin film layer 30, the same ink as in the second embodiment is used, and a pattern (a plurality of patterns) as shown in FIG. A pattern in which the entire plane is filled without gaps in the polygonal unit closed area. The size of each unit closed area is evaluated by the diameter of a circumscribed circle and distributed in a range of 2 to 30 mm.) By gravure printing Thus, the decorative layer 20 was formed to obtain a printed sheet.

Next, a concavo-convex pattern 60 reaching the interface between the metal thin film layer 30 and the base sheet 50 was formed on the surface side of the printed sheet by the same method and conditions as in Example 1. The concavo-convex pattern 60 has a polygonal unit closed region g as shown in FIG. 8A and fills the entire plane without any gap as shown in FIG. 8A, and furthermore, the unit closed region g has a plan view of FIG. And a shape formed by fitting a linear groove h as shown in the sectional view of FIG. In addition, the width a of the ridge portion of the linear groove h is 30 μm,
The width b of the concave streak was 30 μm, and the height difference d was 10 μm.
Then, the unit closed area of the pattern of the decoration layer 20 and the concavo-convex pattern 60
Are the same shape and size.

The front plate 10, the back plate 70, and the transparent adhesive layer 4 made of the two-component curable urethane resin as in the second embodiment.
Using Nos. 1 and 42, a pseudo solar cell plate P was obtained by laminating in the order and direction as shown in FIG.

The appearance of the obtained pseudo solar cell plate had a metallic glossiness, color tone, and pattern similar to those of the actual solar cell plate. In addition to this, a gloss pattern having a characteristic anisotropy and an angle dependency similar to that of other crystalline silicon as shown in FIG. 7 was well reproduced.

[0094]

(1) According to the pseudo solar cell plate of the present invention, a metallic luster that cannot be expressed by a mere printed pattern is expressed, and an appearance more similar to that of a real solar cell plate is obtained. Can be Therefore, the entire surface on which the solar cell plate is laid, such as a roof or a wall, can be finished to the same appearance at low cost, and the scenery does not feel unnatural. (2) Furthermore, a linear groove is fitted in a plurality of adjacent polygonal unit closed areas, and the linear groove is adjacent to the unit closed area via a side. In the configuration formed by shaping the concavo-convex pattern in which the directions of the directions are different from each other, the glossy pattern having the specific anisotropy and angle dependency that the solar cell made of polycrystalline silicon such as polycrystalline silicon has. Can be reproduced. (3) In the configuration in which the concavo-convex pattern imitating the shape of the condensing lens is formed, the appearance of the solar cell plate with the condensing lens can also be patterned. However, the entire surface of the solar cell plate, such as a roof or a wall, can be finished to the same appearance at a low cost without causing a sense of discomfort in the landscape.

(4) The decorative layer is formed on the front or back surface of the transparent base material sheet, the metal thin film layer is formed on the back surface of the transparent base material sheet, or the metal thin film layer is formed on the transparent base material sheet. By adopting any one or more aspects of being formed on the surface of the base material sheet, a pseudo solar cell plate that can be easily manufactured is obtained. For example, the material layer structure is such that the surface plate is made of rigid and brittle glass, and it is difficult to directly form the decoration layer by the printing method or the like, or the material layer is difficult to form the metal thin film layer directly on the decoration layer. This is because, even in the configuration and the like, the configuration can be produced by once forming the decorative layer and the metal thin film layer on the base material sheet and then laminating the decorative layer and the metal thin film layer with another constituent layer such as a surface plate with an adhesive or the like.

(5) In the configuration in which the back plate is laminated on the outermost surface, even if the back surface of the simulated solar cell plate is damaged during the installation, it is possible to prevent the decoration layer and the metal thin film layer from being damaged. , Prevents the appearance from being impaired. In addition, the moisture resistance can be improved, and the mechanical strength required as a pseudo solar cell plate can be increased. (6) Further, in a configuration having an adhesive layer at one or more locations among the respective layers and the adhesive layer on the surface side of the metal thin film layer being transparent, the adhesiveness between the layers is improved. Sometimes (interlayer) peeling can be prevented. Further, in the case of using the base sheet or the like, the pseudo solar cell plate can be manufactured by dividing the pseudo solar cell plate into two or more sheets or plates and laminating the pre-manufactured ones, which can be easily manufactured. Become. Further, by making the adhesive layer on the surface side more transparent than the metal thin film layer, the light reflected by the metal thin film layer can be effectively used, and the appearance of a real solar cell can be more approximated.

[0097]

[Brief description of the drawings]

1A and 1B are a cross-sectional view and a plan view, respectively, illustrating one embodiment of a pseudo solar cell plate of the present invention.

FIG. 2 is a cross-sectional view showing some embodiments of the pseudo solar cell plate of the present invention.

FIG. 3 is a cross-sectional view and a plan view showing another embodiment of the pseudo solar cell plate of the present invention.

FIG. 4 is a perspective view conceptually showing a scene when a pseudo solar cell plate is laid on a roof.

FIG. 5 is a perspective view conceptually showing a conventional landscape when only a solar cell plate is laid on a roof.

FIG. 6 is a perspective view showing an example of the entire shape of the pseudo solar cell plate.

FIG. 7 is a plan view conceptually showing a surface appearance of a solar cell made of a polycrystalline body.

FIGS. 8A and 8B are a plan view and a cross-sectional view of a concavo-convex pattern of a linear groove simulating a surface appearance of a solar cell made of a polycrystalline body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Front board 20 Decorative layer 30 Metal thin film layer 40 Adhesive layer 41-44 (1st-4th) adhesive layer 50 Base sheet 51-53 (1st-3rd) base sheet 60 Uneven pattern 70 Back plate a Width of the convex portion of the (linear groove) b Width of the concave portion of the (linear groove) d Height difference of the (linear groove) e Polycrystal f Single crystal particle g Unit closed area h 10,000 Linear groove i Closed contour line m Electrode pattern K Roof S Solar cell board P Pseudo solar cell board

Claims (6)

[Claims] 1. In order from the surface, at least a surface plate made of a transparent material, a decorative layer made of transparently colored ink having a blue color tone and having a pattern imitating a solar cell, and a metal thin film layer A pseudo solar cell plate that is laminated in order. 2. An uneven pattern is formed on one of a front surface or a back surface of a front plate, a decorative layer, and a metal thin film layer, and the uneven pattern is formed in a plurality of polygonal unit closed regions adjacent to each other. In the unit closed region having a linear groove, and adjacent to each other via a side, the directions of the linear grooves are different from each other.
The pseudo solar cell plate according to claim 1. 3. The simulated solar cell according to claim 1, wherein a concavo-convex pattern imitating the shape of a converging lens is formed on one of a front surface or a back surface of the front plate, a decorative layer, and a metal thin film layer. Board. 4. The decorative layer is formed on the front or back surface of a transparent base sheet, the metal thin film layer is formed on the back surface of a transparent base sheet, or the metal thin film layer is formed on a base sheet. The pseudo solar cell plate according to any one of claims 1 to 3, wherein the pseudo solar cell plate is formed on a surface of the substrate. 5. The pseudo solar cell plate according to claim 1, wherein a back plate is further laminated on the rearmost surface. 6. The method according to claim 1, wherein an adhesive layer is provided at one or more locations among the respective layers, and the adhesive layer on the surface side of the metal thin film layer is transparent. Pseudo solar cell plate.