JP5236342B2 - Decorative materials and decorative articles - Google Patents

Description

  The present invention relates to a decorative material and a decorative article.

There exist a thing of patent documents 1 thru | or 3 as a technique regarding jet black painting.
In Patent Document 1, a first base paint containing a specific amount of a carbon black pigment was applied on a substrate, and a second base paint containing a black dye was applied on the obtained coating film, and further obtained. It describes that a lacquer-like coating film having a texture like natural lacquer is obtained by applying a clear paint containing a specific gloss adjusting agent on the coating film.

  Patent Document 2 describes that the surface roughness of the interfaces of a plurality of coating films is controlled to reduce scattered light in the coating films.

  Patent Document 3 describes a method of producing a high-quality feeling of a coating film by controlling the amount of carbon black contained in the plurality of coating films.

Patent Documents 4 to 6 disclose techniques relating to composite color development.
In Patent Document 4, in order to give a novel design, two or more kinds of polymer compounds having different refractive indexes are alternately overlapped to cause reflection interference between layers, and the hue is changed depending on the viewing angle. A method for giving a feeling is described.

  Further, in Patent Document 5, it is possible to obtain a more vivid color tone by alternately superimposing two kinds of polymer compounds having different refractive indexes to cause color development by reflection interference between layers and including carbon black in the substrate. Have been described.

  In Patent Document 6, in a method for manufacturing a decorative material in which a concave-convex layer is formed on the back surface of a transparent sheet-like base material and a light-reflecting layer is laminated on the outer side, a three-dimensional and clear pattern expression by light and shadow is performed. A method of manufacturing a decorative material that can be used is described.

  In addition, as a technique for forming a concavo-convex layer on the back surface of a transparent sheet-like base material, Patent Document 7 includes two sheets of one or both having a concavo-convex pattern, and the concavo-convex pattern is formed of two sheets. A decorative sheet laminated so as to be a bonded surface is described.

JP 2006-239519 A JP-A-6-15223 JP 2001-179176 A JP 2001-347798 A JP 2002-67239 A JP 2007-216088 A JP 10-34780 A

However, the techniques described in Patent Documents 4 to 6 use the reflected interference light from the layers, which is accompanied by a glittering feeling due to irregular reflection of light, and is not suitable for creating a calm atmosphere due to jet black. Furthermore, although it is described that a black backup layer may be used in the decorative material of Patent Document 6, this decorative material is a light-reflective layer formed of a metal thin film to obtain a blackish metal color. .
Moreover, since the technique of patent document 7 is a decorative sheet, transparency had to be ensured and there existed a problem that an inconvenience arises when using jet black.

  The inventors of the present invention have made extensive studies in order to obtain a clear design using a high-quality jet black as a background color. As a result, a new finding that a high-quality lacquer black is not obtained is that light is not absorbed by the black layer but reflected. Therefore, it has been found that by using both reflected light and absorbed light among the incident light, a clear coloring pattern can be obtained with a high-quality jet black as a background color.

According to the present invention, a transparent substrate having fine irregularities on the upper surface,
A colored transparent layer formed on the transparent substrate;
A black layer formed on the colored transparent layer;
With
In the background color of jet black, a color pattern is formed at a position corresponding to the fine uneven portion, and the arithmetic average roughness Ra defined by JIS B0601 of the fine uneven portion is 0.05 μm or more and 5 μm. The decorating material characterized by the following is provided.

  In this decorating material, the fine uneven part is formed between the transparent base material and the colored transparent layer. Therefore, part of the light incident on the decorating material from the transparent substrate side is reflected by the fine irregularities, and a clear pattern is obtained at a position corresponding to the fine irregularities. In addition, jet black that has a depth and a high-class feeling can be obtained by absorbing light by the black layer. Thereby, an unprecedented beauty can be obtained, and a decorating material that can obtain a clear colored pattern in a background color with a jet black feeling can be realized.

  ADVANTAGE OF THE INVENTION According to this invention, the decorating material and decorating article from which a clear coloring pattern is obtained in the background color with a jet black feeling are implement | achieved.

  Hereinafter, a preferred embodiment of a decorating material according to the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same reference numerals are assigned to the same elements, and duplicate descriptions are omitted. Further, in the following embodiment, description will be made by defining the front and rear, left and right and up and down directions as shown. However, this is provided for the sake of convenience in order to briefly explain the relative relationship between the components. Therefore, the direction at the time of manufacture and use of the product which implements the present invention is not limited.

(First embodiment)
FIG. 1 is a cross-sectional view for explaining the principle when light enters the decorating material according to the present embodiment.
The decorative material 100 includes a transparent substrate 10 having a fine uneven portion 40 on the back surface (the lower surface in FIG. 1), a colored transparent layer 20 formed under the transparent substrate 10, and a colored transparent layer 20. And a formed black layer 30. The decorating material 100 is configured such that when the transparent base material 10 is viewed from above, a colored pattern emerges at a position corresponding to the fine uneven portion 40 in the jet black background color.

On the surface of the transparent substrate 10 (the lower surface in FIG. 1), the fine uneven portion 40 may be formed on the entire surface, or may be formed only on a part thereof. Depending on the formation region of the fine uneven portion 40, there are effects that the pattern variation increases and that an aesthetic appearance utilizing the contrast with the background color is obtained. FIG. 1 shows a case where the fine uneven portion 40 is formed only in part. By forming the fine concavo-convex portion 40 only in a part, the design area can be limited and patterns, fonts, paintings, etc. can be represented.
Although the thickness of the transparent base material 10 is not specifically limited, Preferably it is 0.05 mm or more, More preferably, it is 0.1 mm or more. Moreover, the thickness of the transparent substrate 10 is not particularly limited, but is preferably 10 mm or less, more preferably 3 mm or less.
As the transparent substrate 10, at least one of a transparent resin plate, a glass plate, and a transparent ceramic plate can be used. The transparent substrate 10 may be a single layer or a multilayer, and may include a film.
The transparent substrate 10 may be colorless or colored. Thereby, the design of various hues can be obtained.

The fine uneven portion 40 is a concave portion or a convex portion, and includes only the concave portion or the convex portion with respect to the surface of the transparent substrate 10. The fine irregularities 40 include grooves, holes, or holes obtained by roughening the surface of the transparent substrate 10 or the like. The fine uneven portion 40 is preferably at least one of a mat shape, a hairline shape, a groove shape, a textured shape, and a diffraction grating shape. The fine uneven portion 40 may be formed of an ultraviolet curable resin. Thereby, the uneven | corrugated | grooved part of a desired shape or magnitude | size is obtained, and the design pattern with various functions is easily realizable.
The fine concavo-convex portion 40 becomes a pattern region (region provided with fine concavo-convex portions), and a two-dimensional or three-dimensional pattern appears on the upper surface of the decorating material 100 (the upper surface of the transparent substrate 10 in FIG. 1). Make it. The fine concavo-convex portion 40 can reflect a part of the light incident from the transparent substrate 10 side and transmit the other part. Moreover, it can function as a scatterer that diffusely reflects light.

  The shape of the fine concavo-convex portion 40 is not particularly limited, and for example, the shape shown in FIG. FIG. 8 is an enlarged cross-sectional view of the fine uneven portion 40.

As shown in FIG. 8A, the fine concavo-convex portion 40 is formed to be concave or convex substantially parallel to the normal direction of the surface of the transparent substrate 10.
The arithmetic average roughness Ra (JIS B0601) of the fine irregularities 40 is preferably 0.05 μm or more, and more preferably 0.1 μm or more. Further, Ra is preferably 5 μm or less, more preferably 3 μm or less. Thereby, a large reflected light amount can be obtained. That is, the fine uneven portion 40 (scatterer) having a size within this range usually depends on the shape and the refractive index difference from the periphery, but usually has a scattering ability for visible light of 2 to 3 described by Mie scattering. Since it has a scattering capacity larger than the scattering capacity 2 when the scatterer is large, a large amount of reflected light can be obtained.

  The distance between the individual irregularities of the minute irregularities 40 is more preferably about the arithmetic average roughness Ra. Thereby, the amount of reflected light is also maximized. That is, the amount of light reflected by the fine uneven portions 40 (scatterers) existing in the plane depends on the scattering ability of each fine uneven portion 40 (scatterer) and the number of fine uneven portions 40 (scatterers) per unit area. However, as a matter of course, the larger the size of each, the greater the amount of reflected light. For this reason, preferably, when the fine uneven portions 40 (scatterers) are distributed at an average size interval, the scatterer density is maximized and the amount of reflected light is also maximized.

  Further, in relation to the arithmetic average roughness Ra, for example, when Ra is 1 μm and the fine uneven portion 40 (scatterer) is finely packed, the fine uneven portion 40 (scatterer) is compared with the case where Ra is 3 μm. If it is a similar shape, the number may increase by a factor of nine. For this reason, when the product with the scattering power is compared, the amount of reflected light may increase when Ra is 1 μm.

Moreover, as shown in FIG.8 (b), the fine uneven | corrugated part 40 has the 1st area | region 401 in which the large recessed part 41 whose depth is 5 micrometers or more was formed, and the 2nd area | region in which the large recessed part 41 is not formed. 402 may be included.
In this case, the arithmetic average roughness Ra (JIS B0601) of the fine irregularities 40 in the second region 402 is preferably 0.05 μm or more, more preferably 0.1 μm or more. Further, Ra is preferably 5 μm or less, more preferably 3 μm or less.
The large recessed portion 41 is larger than the recessed portion of the fine uneven portion 40, and the depth of the large recessed portion 41 is 5 μm or more and 50 μm or less. The opening width of the large recess 41 is not particularly limited, but is preferably 1 μm or more.

  A fine uneven portion 40 may be further provided on the inner wall surface of the large recessed portion 41 (FIG. 8B). Thereby, since the normal direction of the formation region of the fine uneven portion 40 is different from the normal direction of the surface of the transparent base material 10, the reflection of the reflected light of the surface reflection and the surface layer reflection with respect to the incident light from the same direction. The direction is different and different symbols are visible from different directions.

  Further, the inner wall surface of the large concave portion 41 is a slope, and the normal direction of the slope is a smooth surface other than the pattern region, or the normal direction of the unevenness formation region of the symbol region provided in the smooth surface. It may be different. Thereby, the reflection direction can be specified and the direction in which the symbol can be visually recognized can be controlled.

Further, by combining the directionality or angle of the inner wall surface of the large concave portion 41 of the fine concavo-convex portion 40 and controlling the directionality of the reflected light from the fine concavo-convex portion 40 (design region), a plurality of symbols can be specified respectively. Visible from the direction.
Furthermore, the fine concavo-convex portion 40 and the large concave portion 41 can represent patterns, fonts, paintings, and the like by limiting the fine concavo-convex region as a pattern region.

  When the large concave portions 41 are periodically formed, the average interval (pitch) is not particularly limited and can be arbitrarily set. The average interval (pitch) of the large recesses 41 can be measured by observing the surface shape of the decorating material 100 with an electron microscope and calculating the average period of the large recesses 41. The pitch of the large recesses 41 is preferably 1 μm or more and 50 μm or less, more preferably 20 μm or less.

As a method for forming the fine concavo-convex portion 40, a method by roughening is used. In particular, it is preferably formed using at least one of mat processing, hairline processing, groove processing, texture processing, and diffraction grating processing. Thereby, the reflection enhancement structure by the fine uneven part 40 is obtained. Moreover, the structure which distributed the fine fine uneven | corrugated | grooved part 40 in the boundary surface of the colored transparent layer 20 and the transparent base material 10 is obtained by forming combining the processing direction by these methods.
In addition, since the minute fine irregularities 40 have a linear shape and the distribution has directionality, the reflection direction of the reflected light of the surface reflection and the surface layer reflection is strongly reflected in a plane perpendicular to the direction of the line group. Can do.

Examples of the material for the colored transparent layer 20 include, as a resin binder, vinyl chloride resin, vinyl chloride-vinyl acetate copolymer resin, acrylic resin, polycarbonate resin, amorphous polyester resin, polypropylene resin, acrylonitrile-butadiene- Examples thereof include styrene resins and polyacrylonitrile resins. The coloring ink is not particularly limited, but an organic pigment is preferable. The colored transparent layer 20 is a color clear coating film and is transparently colored. The hue of coloring is not particularly limited, and examples thereof include sky blue, blue, and yellow.
The thickness of the colored transparent layer 20 is not particularly limited, but is preferably 1 μm or more and 30 μm or less.

  Although the hue of the colored transparent layer 20 is not particularly limited, a design of a predetermined color can be visually recognized by a combination of the hue of the colored transparent layer 20 and the shape of the fine uneven portion 40.

Examples of the material of the black layer 30 include, as a resin binder, vinyl chloride resin, vinyl chloride-vinyl acetate copolymer resin, acrylic resin, polycarbonate resin, amorphous polyester resin, polypropylene resin, acrylonitrile-butadiene-styrene. Resin, polyacrylonitrile resin and the like. Although the coloring method is not particularly limited, it can be colored black with carbon black or the like.
Although the thickness of the black layer 30 is not specifically limited, 1 micrometer or more and 60 micrometers or less are preferable.
The black layer 30 is a black base coating film and functions as a layer that absorbs light.

  Next, the effect of the decorating material 100 will be described.

  In this decorating material 100, fine uneven portions 40 are formed on the lower surface of the transparent substrate 10. That is, the fine uneven part 40 exists between the transparent substrate 10 and the colored transparent layer 20. Therefore, a part of the light incident on the decorating material 100 from the transparent substrate 10 side is reflected by the fine uneven portion 40, and a clear pattern is obtained at a position corresponding to the fine uneven portion 40. Moreover, the black layer 30 can obtain a jet black with a depth and a high-class feeling by absorbing light. As a result, an unprecedented aesthetic appearance can be obtained, and the decorating material 100 capable of obtaining a clear coloring pattern in a jet black background color can be realized.

Details will be described with reference to FIGS.
FIG. 1 is a cross-sectional view for explaining the principle when light enters the decorating material according to the present embodiment. FIG. 9 is a cross-sectional view for explaining the principle when light is incident on a conventional laminate of a transparent substrate and a colored transparent layer.

As shown in FIG. 9, incident light (white light) L1 incident on the upper surface of the transparent base material 10 of the laminate 300 passes through the transparent base material 10, and then passes through the colored transparent layer 20 and is transmitted light L2. It is divided into either surface reflected light and surface reflected light L3 (o) slightly reflected on the upper surface of the transparent layer 20, or absorbed light L4 absorbed in the colored transparent layer 20.
Conversely, the irradiation light L5 incident on the lower surface of the colored transparent layer 20 also passes through the colored transparent layer 20 and then passes through the transparent base material 10 in the same manner as the incident light L1. The surface reflection light and the surface layer reflection light (not shown) that are slightly reflected on the lower surface of the light, or the absorption light (not shown) absorbed in the transparent substrate 10 is divided.

  That is, when the laminated body 300 is viewed from the upper surface of the transparent substrate 10, the hue of the colored transparent layer 20 is formed and visually recognized by the transmitted light L2, the reflected light L3 (o), and the transmitted light L6. However, the light energy of the reflected light L3 (o) is about 1%, which is very small compared to the transmitted light L2 and the transmitted light L6. Therefore, even if the wavelength region is different from the transmitted light L2 and the transmitted light L6, It is difficult to be visually recognized. Therefore, the transmitted light L2 and the transmitted light L6 are visually recognized as the main hues.

  On the other hand, the decorating material 100 employs a structure as shown in FIG. That is, the decorating material 100 is partly reflected by the fine concavo-convex portion 40 and emitted out of the transparent substrate 10 from the incident light that is incident from the upper surface of the transparent substrate 10 and transmitted through the transparent substrate 10. In addition, the other part is configured to pass through the colored transparent layer 20 and reach the black layer 30 and be absorbed. Details will be described below.

As shown in FIG. 1, in the decorative material 100, the black layer 30 is provided on the lower surface of the colored transparent layer 20, and the fine uneven portion 40 is formed on a part of the lower surface of the transparent substrate 10. Incident light L1 incident on the upper surface of the transparent base material 10 passes through the transparent base material 10 and then passes through the colored transparent layer 20 and is absorbed by the black layer 30, and is slightly absorbed on the upper surface of the colored transparent layer 20. The surface reflected light and the surface layer reflected light L3 (o) reflected on the surface, the reflected light L3 (eo) reflected by the fine uneven portion 40, or the absorbed light L4 absorbed in the colored transparent layer 20 are divided. In this case, the transmitted light L2 = absorbed light L7 shown in FIG.
Conversely, the irradiation light L5 incident on the lower surface of the black layer 30 does not exist because it is absorbed by the black layer 30.

Here, fine irregularities 40 are formed on a part of the lower surface of the transparent substrate 10. The reflected light amount of the reflected light L3 (eo) reflected by the fine uneven portion 40 can be significantly increased by the fine uneven portion 40 as compared with the reflected light L3 (o). Thus, the reflected light L3 (eo) whose light quantity is enhanced can be visually recognized.
For this reason, when the decorating material 100 is viewed from the upper surface of the transparent base material 10, a part of the incident light L <b> 1 is reflected by the fine uneven portion 40 to become reflected light L <b> 3 (eo), and the fine uneven portion 40. Looks clear. On the other hand, since the reflected light L3 (o) is hardly visually recognized, black with a jet black feeling is visually recognized as a base of the design.
In this way, an unprecedented aesthetic appearance can be obtained, and the decorating material 100 that can be visually recognized with a jet black as a background color so that a clear and three-dimensional design is raised can be realized.

Next, the manufacturing method of the decorating material 100 in this embodiment is demonstrated.
The decorating material 100 can be manufactured as follows, for example.
First, the transparent substrate 10 having a flat surface is prepared, and the fine uneven portion 40 is formed on the upper surface of the transparent substrate 10. Next, it can manufacture by apply | coating colored transparent ink or a coating material on the transparent base material 10 to form the colored transparent layer 20, and then apply | coating black ink or a coating material and forming the black layer 30 in order.

  As a method for forming the fine uneven portion 40, a method by roughening is used. In particular, at least one of mat processing, hairline processing, groove processing, texture processing, and diffraction grating processing is preferable.

  Furthermore, the decoration article which equips the surface with the decorating material 100 is obtained. For example, since a deep-colored pattern can be obtained against a jet black background, it can be used for high-grade coated articles such as mobile phones, personal computers, and liquid crystal television casings that have recently started to require a particularly decorative surface coating. It is also used for high-end home appliances. In addition, it can be used as a decorative wallpaper for interior with a high-class feeling by diverting it to a special wallpaper such as automobile painting. A known method can be used for the surface coating.

  The decorating material and the manufacturing method thereof according to the present invention are not limited to the above embodiment, and various modifications are possible.

  In the above-described embodiment, an example in which the large concave portion 41 is formed in the first region 401 is shown, but a large convex portion having a height of 5 μm or more may be formed in the first region 401. In this case, the large convex portion is larger than the convex portion of the fine uneven portion 40, and preferably has a maximum width of 1 μm or more. Moreover, the fine uneven | corrugated | grooved part 40 may be further provided in the outer wall surface of a large convex part. Even with such a large convex portion, the same effect as that of the large concave portion 41 can be obtained. In the first region 401, either one or both of the large concave portion 41 and the large convex portion may be formed.

Examples of the present invention are shown below and the present invention is described in detail.
(Experiment 1)
The following experiment was conducted using Example 1.

Example 1
A pattern is formed on a transparent substrate made of polycarbonate, and a blue color clear layer (KKY 440 Blue made by Seiko Advance Co., Ltd.) and a black layer (KKY 710 black made by Seiko Advance Co., Ltd.) are sequentially applied by silk screen printing. Films were laminated. As a design, a ring-shaped hairline shape was coated with an ultraviolet curable resin, and this was placed on a transparent substrate to obtain a decorating material 1.
The appearance image when light is irradiated to the obtained decorating material 1 from the transparent substrate side is shown in FIG. As shown in FIG. 2, a spotted pattern (reddish purple) shown in white in the jet black background color emerged and could be visually recognized in three dimensions.

  Furthermore, the state of the fine unevenness | corrugation formed in the surface of the transparent substrate of the decorating material 1 was measured. As a result of observing the surface shape of the decorating material 1 using a laser microscope VK-9500 manufactured by Keyence Corporation, it was calculated that the average interval between the large concave portions formed periodically was about 50 μm pitch. In addition, the “maximum height Ry” in the “reference length” 250 μm of the fine unevenness corresponding to the position where the symbol was visually recognized was ˜1.5 μm, and the “arithmetic average height Ra” was ˜0.3 μm.

(Reference Example 1)
A color clear layer colored with KKY 440 Blue manufactured by Seiko Advance Co., Ltd. was prepared, and the spectral transmittance distribution (the spectral distribution of L2) was measured. In this case, the measured spectrum corresponds to the spectrum of L2 shown in FIG.
The result is shown in FIG.
As shown in FIG. 3, the spectrum had a peak at 490 nm (transmission 50%), and the FWHM (full width at half maximum) centered at 490 nm was about 120 nm.
FIG. 3 shows that the light incident on the color clear layer is transmitted in the FWHM 120 nm region (370 nm to 610 nm) centered at 490 nm and hardly transmitted in the 580 nm to 740 nm region. Further, the transmittance peak was about 50%, and a clear hue was obtained.

(Reference Example 2)
The spectral reflectance distribution (L6 spectral distribution) of a two-layered body of a color clear layer colored with KKY 440 Blue manufactured by Seiko Advance Co., Ltd. and a white reflector was measured. In this case, the measured spectrum corresponds to the spectrum of L6 shown in FIG. This measurement corresponds to the case where L2 and L5 in FIG.
The result is shown in FIG.

As shown in FIG. 4, the spectrum has a peak at 470 nm (reflection: 53%, reflectance from the white reflector is 100%), and FWHM centered at 470 nm is about 90 nm. Further, there was a slight amount of reflected light on the longer wavelength side than 560 nm, there were gentle peaks in the vicinity of 620 nm and 720 nm, and the reflectance increased after 740 nm.
Unlike the case of FIG. 3, the full width at half maximum was reduced to approximately 90 nm, and it was found that there was reflected light on the longer wavelength side than 560 nm. Further, it was found that such a reflected light amount corresponds to L3 (0) in FIG. 9, and slight surface reflection and surface layer reflection occur on the upper surface of the color clear layer.

(Reference Example 3)
The spectral reflectance distribution (the spectral distribution of L3 (o) or L3 (eo)) of a bilayer body of a color clear layer and a black layer colored with KKY 440 Blue manufactured by Seiko Advance Co., Ltd. was measured. In this case, the measured spectrum corresponds to the spectrum of L3 (o) or L3 (eo) shown in FIG. In the measurement, as described with reference to FIG. 1, there is no incident light from the back surface (lower surface) of the black layer.
The result is shown in FIG.

As shown in FIG. 5, the reflectance was about 1%. In addition, there were peaks in which the reflectance was relatively large in the vicinity of 420 nm, 620 nm, 720 nm, and the region after 740 nm. This peak near 420 nm is the base of the blue region which is the main wavelength region.
The synthesis result of the peak light at these four points was magenta. This was the same color as the spotted pattern shown in white in FIG.

  As shown in FIGS. 3 to 5, the transmitted light of the color clear layer is absorbed by the black layer to visually recognize the jet black background color, and at the same time, the surface reflection and the surface layer reflection on the upper surface of the color clear layer are reflected by the fine irregularities. A decorative material suitable for realizing a high-quality decoration was obtained by enhancing the color so that a clear pattern could be visually recognized.

(Experiment 2)
The following experiment was conducted using Example 2 shown below.

(Example 2)
Similar to Example 1 except that instead of the blue color clear layer used in Example 1 above, a color clear layer colored with a dark blue transparent ink (VIC Conque 400 Ultra Blue manufactured by Seiko Advance Co., Ltd.) was used. The coating was laminated. In addition, the pattern was copied and formed with a linear hairline processing state using an ultraviolet curable resin, and this was placed on a transparent substrate to obtain a decorating material.
Spectral reflectance distribution (spectral distribution of L3 (o) or L3 (eo)) (hereinafter referred to as “black amber light”) of the obtained decorative material was measured. In this case, the measured spectrum corresponds to the spectrum of L3 (o) or L3 (eo) shown in FIG.
The result is shown as “black amber light” in FIG.

(Reference Example 4)
Spectral transmittance distribution (L2 spectral distribution) (hereinafter referred to as "transmitted light") of a two-layered body of a color clear layer and a transparent substrate colored with dark blue transparent ink (VIC Conque 400 Ultra Blue manufactured by Seiko Advance Co., Ltd.) ) And spectral reflectance distribution (L6 spectral distribution) (hereinafter referred to as “reflected light”). In this case, the measured spectrum corresponds to the spectra of L2 and L6 shown in FIG.
The result is shown in FIG.

  As shown in FIG. 6, the transmitted light has almost no light quantity at wavelengths other than the wavelength region indicating the main hue, but since the color is dark, the transmittance is shown on the left vertical axis even at the peak value. It was about 10%. The reflected light had a reflectance of about 1% in the range other than the main wavelength region, as shown on the left vertical axis. This is reflected light due to surface reflection and surface reflection of the color clear layer.

  As shown in FIG. 6, the spectral distribution of black amber light has an extremely low reflectance (%) as shown on the right vertical axis. However, it was found that it had the same peak as the reflected light spectrum of the color clear layer.

  From the above, the color of the pattern region that is visually recognized by enhancing the reflected light by the surface reflection and surface reflection of the color clear layer is centered on blue of 480 nm and red of a very deep color of 730 nm or more, and around 580 nm. It was found to be visually recognized as a reddish purple mixed with an orange in which the orange of 660 and red near 660 nm were superimposed.

Further, from the measured values shown in FIG. 6, the spectral spectra of L3 (o) and L3 (eo) were obtained by a calculation formula.
The result is shown in FIG.

The transmittance distribution in FIG. 6 is a spectrum of the transmitted light L2 in FIG. 9 and is given by the following equation (1).
Transmittance distribution of transmitted light L2 = wavelength distribution of incident light L1 × transmittance distribution of transparent substrate × transmittance distribution of color clear layer (1)

Similarly, the reflectance distribution in FIG. 6 is measured by installing a white reflector behind the color clear layer in FIG. 9, and is given by the following equation (2).
In FIG. 6, the reflectance distribution = the reflectance distribution of the reflected light L3 (o) of the color clear layer + the transmittance distribution of the transmitted light L6 = the reflectance distribution of the reflected light L3 (o) of the color clear layer + the transmitted light L2. Rate distribution × Reflectance distribution of white reflector × Transmittance distribution of transmitted light L2 (2)

From the above formulas (1) and (2), the spectral spectra of the reflected lights L3 (o) and L3 (eo) shown in FIG. 1 are given by the following formula (3).
Reflectance distribution of reflected light L3 (eo) = reflectance distribution of FIG. 6−transmittance distribution of transmitted light L6 = reflectance distribution of FIG. 6−transmittance distribution of transmitted light L2 × reflectance distribution of white reflector × transmission Light L2 transmittance distribution (3)

  FIG. 7 shows the results obtained from the above calculation using the measured values shown in FIG. 6 and the reflectance distribution of the white reflector. The calculation result and the measurement result almost coincided with each other, and it was found that the calculation principle was the same as that described in FIGS.

It is sectional drawing for demonstrating the principle when light injects into the decorating material concerning this embodiment. It is an external view which shows the decorating material concerning this embodiment. It is a figure which shows spectral transmittance distribution (L2). It is a figure which shows spectral reflectance distribution (L3 (o) + L6). It is a figure which shows the spectral reflectance distribution (L3 (o)) concerning this embodiment. It is a figure which shows a spectral characteristic. It is a figure which shows the spectral characteristic calculated | required by calculation. It is sectional drawing to which the cross section of the fine uneven part was expanded. It is sectional drawing for demonstrating the principle when light injects into the laminated body of a transparent base material and a colored transparent layer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Decorating material 10 Transparent base material 20 Colored transparent layer 30 Black layer 40 Fine uneven part 41 Large recessed part 100 Decorating material 300 Laminated body 401 1st area | region 402 2nd area | region L1 Incident light L2 Transmitted light L3 Reflected light L4 Absorption Light L5 Irradiation light L6 Transmission light L7 Absorption light

Claims (9)

A transparent substrate having fine irregularities on the top surface;
A colored transparent layer formed on the transparent substrate;
A black layer formed on the colored transparent layer;
With
In the background color of jet black, a color pattern is formed at a position corresponding to the fine uneven portion, and the arithmetic average roughness Ra defined by JIS B0601 of the fine uneven portion is 0.05 μm or more and 5 μm. A decorative material characterized by the following .   A transparent substrate having fine irregularities on the top surface;
  A colored transparent layer formed on the transparent substrate;
  A black layer formed on the colored transparent layer;
With
  In a jet black background color, a colored pattern is formed in a position corresponding to the fine uneven portion, and the fine uneven portion has a large recessed portion having a depth of 5 μm or more and / or a height of 5 μm or more. A first region where a large convex portion is formed, and a second region where the large concave portion and / or the large convex portion is not formed,
  The decorating material, wherein an arithmetic average roughness Ra defined by JIS B0601 of the fine irregularities in the second region is 0.05 μm or more and 5 μm or less.   In the decorating material of Claim 2,
  The inner wall surface of the large concave portion and / or the outer wall surface of the large convex portion is further provided with a fine uneven portion having an arithmetic average roughness Ra specified by JIS B0601 of 0.05 μm or more and 5 μm or less. Decorating material. In the decorating material as described in any one of Claims 1 thru | or 3 ,
Of the incident light incident from the lower surface of the transparent substrate and transmitted through the transparent substrate, a part of the incident light is reflected by the fine irregularities and emitted out of the transparent substrate, and the other part of the incident light A decorating material configured to be transmitted through a colored transparent layer and absorbed by the black layer. In the decorating material in any one of Claims 1 thru | or 4 ,
The decorating material, wherein the fine irregularities are formed only on a part of the transparent substrate. In the decorating material in any one of Claims 1 thru | or 5 ,
The said transparent base material uses at least any one among a transparent resin plate, a glass plate, and a transparent ceramic board, The decorating material characterized by the above-mentioned. In the decorating material in any one of Claims 1 thru | or 6 ,
The decorating material, wherein the fine uneven portion is at least one of a mat shape, a hairline shape, a groove shape, a textured shape, and a diffraction grating shape. In the decorating material in any one of Claims 1 thru | or 7 ,
The decorative material, wherein the fine uneven portion is formed of an ultraviolet curable resin. A decorative article comprising the decorative material according to any one of claims 1 to 8 on a surface thereof.