KR101452507B1 - Decorative material and decorative product - Google Patents

Abstract

The object of the present invention is to realize a decorative material and a decorative article in which a black color is obtained as a background color.

In the decorative material 100, the fine concavo-convex portion 40 is formed at the interface between the transparent substrate 10 and the colored transparent layer 20. As a result, light incident from the side of the transparent substrate 10 to the decorative material 100 is partially reflected by the fine concave-convex portion 40, and a clear pattern is obtained at a position corresponding to the fine convexo-concave portion 40. Further, the black layer 30 absorbs the light, thereby obtaining a darkness having a depth and a high-quality feeling. Thereby, a beautiful appearance without a convention is obtained, and a clear coloring form is obtained in the background color having a feeling of blackness.

A decorative material, a transparent material, a decorative article, a fine uneven portion,

Description

{DECORATIVE MATERIAL AND DECORATIVE PRODUCT}

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

There are those described in Patent Documents 1 to 3 as techniques relating to black paint.

In Patent Document 1, a first base paint containing a specified amount of carbon black pigment is applied on a base material, a second base paint containing a black dye is coated on the obtained coating film (coating film) It is described that a coating of a clear paint containing a specific gloss-adjusting agent is applied on a coating film to obtain a coating of a chil- do coating having the same texture as a natural coating.

Patent Document 2 discloses that the surface roughness of the interface of a plurality of coated films is controlled to reduce scattered light in the coated film.

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

There are those described in Patent Documents 4 to 6 as a technique related to complex color development.

Patent Document 4 discloses a method of causing reflection interference between layers by alternately superimposing two or more kinds of polymer compounds having different refractive indexes in order to give new designability and changing the hue according to viewing angle to have a high brightness feeling .

Patent Document 5 discloses that two kinds of polymer compounds having different refractive indexes are alternately overlapped to develop color by reflection interference between layers, and a clearer color tone is obtained by including carbon black in the base.

Patent Document 6 discloses a method for producing a decorative material that forms a concave-convex layer on the back surface of a transparent sheet-like base material and laminated a light reflection layer on the outer side thereof, a method of manufacturing a decorative material capable of expressing stereoscopic and clear patterns by light and shadow .

Patent Document 7 discloses a technique for forming a concavo-convex layer on the back surface of a transparent sheet-like base material. In Patent Document 7, there is disclosed a technique of joining two sheets having unevenness shapes on one side or both sides thereof to form a concave- Sheet is described.

[Patent Document 1] Japanese Patent Application Laid-Open No. 2006-239519

[Patent Document 2] Japanese Patent Application Laid-Open No. 6-15223

[Patent Document 3] Japanese Patent Application Laid-Open No. 2001-179176

[Patent Document 4] Japanese Patent Application Laid-Open No. 2001-347798

[Patent Document 5] Japanese Patent Application Laid-Open No. 2002-67239

[Patent Document 6] Japanese Patent Application Laid-Open No. 2007-216088

[Patent Document 7] Japanese Patent Application Laid-Open No. 10-34780

However, in the techniques described in Patent Documents 4 to 6, since the reflection interference light from the interlayer is used, the luster due to the diffuse reflection of light is accompanied and it is not suitable for generating a stable atmosphere due to darkness. Further, in the decorative material of Patent Document 6, it is described that a black backup layer may be used, but this decorative material is to form a light reflection layer with a metal thin film to obtain a blackish metallic color.

In addition, since the technique described in Patent Document 7 is a decorative sheet, transparency must be ensured, which poses a problem that problems arise in using black.

The inventors of the present invention carried out a careful examination in order to obtain a clear pattern with a high-quality black background as a background color. As a result, it was found that a black color with higher quality was not obtained because the light was not absorbed by the black layer but was reflected. Thus, it has been found that, by using both the reflected light and the absorbed light in the incident light, a clear colored pattern having a high-quality black color as a background color can be obtained.

According to the present invention, there are provided a transparent substrate having a fine uneven portion on its upper surface,

A colored transparent layer formed on the transparent substrate,

And a black layer formed on the colored transparent layer,

And a colored pattern is formed at a position corresponding to the fine convexo-concave portion in the background color of black.

In this decorative material, fine uneven portions are formed between the transparent substrate and the colored transparent layer. As a result, a part of the light incident on the decorative material from the transparent substrate side is reflected by the fine concave / convex portions, and a clear pattern is obtained at the position corresponding to the fine concave-convex portion. In addition, the black layer absorbs light, and it is possible to obtain darkness that has a depth and a sense of quality. As a result, it is possible to realize a decorative material in which a beautiful aesthetic appearance can not be obtained in the past, and a clear colored appearance can be obtained in a background color having a feeling of blackness.

According to the present invention, a decorative material and a decorative article in which a clear colored pattern is obtained in the background color having a black background are realized.

Hereinafter, preferred embodiments of the decorative material according to the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. In the following embodiments, the directions of the front, back, left, right, and up and down directions will be described. However, this is a convenience specification to briefly describe the relative relationship of components. Therefore, the direction of production or use of the product embodying the present invention is not limited.

(First Embodiment)

Fig. 1 is a cross-sectional view for explaining the principle when light enters a decorative material according to the embodiment. Fig.

The decorative material 100 includes a transparent substrate 10 having a fine concavo-convex portion 40 on the back surface (lower surface in Fig. 1), a colored transparent layer 20 formed under the transparent substrate 10, And a black layer 30 formed thereunder. The decorative material (100) is configured so that when the transparent substrate (10) is viewed from above, a colored pattern is formed at a position corresponding to the fine uneven portions (40) in the background color of darkness.

The surface (the lower surface in Fig. 1) of the transparent substrate 10 may be formed on the entire surface of the fine concavo-convex portion 40 or only on a part thereof. The variation of the design is increased by the formation area of the minute uneven portion 40 and the aesthetic appearance is obtained by using the contrast with the background color. Fig. 1 shows a case where only a part of the fine uneven portion 40 is formed. By forming only a part of the minute concave-convex portion 40, a pattern area can be defined to indicate a pattern, a font, a painting, and the like.

The thickness of the transparent substrate 10 is not particularly limited, but is preferably 0.05 mm or more, and more preferably 0.1 mm or more. The thickness of the transparent substrate 10 is not particularly limited, but is preferably 10 mm or less, and 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, patterns of various colors can be obtained.

The fine uneven portion 40 is a concave portion or a convex portion and includes only one of the concave portion and the convex portion with respect to the surface of the transparent substrate 10. The fine irregularities 40 include grooves, perforations or holes obtained by roughening the surface of the transparent substrate 10 or the like. It is preferable that the fine uneven portion 40 is at least one of a mat shape, a hairline shape, a groove shape, a wrinkle shape, and a diffraction grating shape. In addition, the fine concavo-convex portion 40 may be formed of an ultraviolet curable resin. As a result, a concavo-convex portion having a desired shape or size can be obtained, and a pattern having various functions can be easily realized.

The minute concavo-convex portion 40 becomes a pattern area (a region where fine irregularities are formed) and causes a planar or three-dimensional shape to float on the upper surface of the decorative material 100 (the upper surface of the transparent substrate 10 in Fig. The fine concavo-convex portion 40 can reflect a part of the light incident from the side of the transparent substrate 10 and can transmit the other part. Further, it can function as a scattering body that diffusely reflects light.

The shape of the fine uneven portions 40 is not particularly limited, but for example, those shown in Fig. 8 can be used. 8 is an enlarged cross-sectional view of the fine uneven portion 40. FIG.

As shown in Fig. 8 (a), the fine uneven 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 mean roughness (Ra) (JIS B0601) of the fine concavo-convex portion 40 is preferably 0.05 占 퐉 or more, and more preferably 0.1 占 퐉 or more. Ra is preferably 5 占 퐉 or less, and more preferably 3 占 퐉 or less. Thus, a large amount of reflected light can be obtained. In other words, the fine convexo-concave portion 40 (scattering body) having a size in this range depends on the shape and the refractive index difference with the periphery, but the scattering ability with respect to visible light, which is generally described by Mie scattering, The scattering ability is larger than the scattering ability 2 in the case where the scattering body is large, and therefore, a large amount of reflected light can be obtained.

The distance between each concavity and convexity of the minute concavo-convex portion 40 is more preferably about the arithmetic mean roughness (Ra). Thereby, the amount of reflected light also becomes maximum. That is, the amount of light reflected by the fine concavo-convex portion 40 (scattering body) existing in the plane is smaller than the scattering performance of each fine concave-convex portion 40 (scattering body) Depends on the number of light sources, and, of course, the larger each, the greater the amount of reflected light as a result. Therefore, in the case where the fine irregularities 40 are distributed at intervals of the average size of the fine irregularities 40 (scattering body), the scattering body density becomes largest and the amount of reflected light becomes maximum.

In the relation with the arithmetic average roughness Ra, for example, when the Ra is 1 占 퐉 and the fine uneven portions 40 (scattering bodies) are finely packed, the fine uneven portions 40, (Scattering body) is a homology type (analogous type), the number may be 9 times. As a result, when the product of the scattering performance and the product of the scattering ability is compared, there is a possibility that the amount of reflected light becomes larger when Ra is 1 탆.

8B, the fine uneven portion 40 has a first region 401 in which a large concave portion 41 having a depth of 5 mu m or more is formed and a large concave portion 41 are formed The second region 402 may be provided.

The arithmetic average roughness Ra (JIS B0601) of the fine concavo-convex portion 40 in the second region 402 in this case is preferably 0.05 占 퐉 or more, and more preferably 0.1 占 퐉 or more. Ra is preferably 5 占 퐉 or less, and more preferably 3 占 퐉 or less.

The large concave portion 41 is larger than the concave portion of the fine concave-convex portion 40, and the depth of the large concave portion 41 is 5 占 퐉 or more and 50 占 퐉 or less. The opening width of the large concave portion 41 is not particularly limited, but is preferably 1 占 퐉 or more.

The fine concave-convex portion 40 may be provided on the inner wall surface of the large concave portion 41 (Fig. 8 (b)). Thus, since the normal direction of the region where the fine uneven portions 40 are formed is different from the normal direction of the surface of the transparent substrate 10, the incident light from the same direction is reflected in the direction of reflection Different images can be visually confirmed from different directions.

The inner wall surface of the large concave portion 41 may be an inclined surface and the normal direction of the inclined surface may be different from the normal direction of the concave-convex forming area of the pattern area formed in the smooth surface or the smooth surface other than the pattern area. Thereby, it is possible to control the direction in which the visual direction can be visually confirmed by specifying the reflection direction.

It is also possible to control the directionality of the reflected light from the fine concave-convex portion 40 (the pattern area) by combining the direction or angle of the inner wall surface of the large concave portion 41 of the fine concave- Can be visually confirmed.

Further, the fine concave-convex portion 40 and the large concave portion 41 can define a pattern, a font, a painting, etc. by defining a minute uneven area as a pattern area.

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

As a method for forming the fine concavo-convex portion 40, a method based on rough surface processing is used. Particularly, it is preferable to use at least one of a mat processing, a hair line processing, a groove processing, a wrinkle processing, and a diffraction grating processing. Thereby, the reflection enhancing structure by the fine concavo-convex portion 40 is obtained. In addition, by forming the processing directions by these methods in combination, it is possible to obtain a structure in which the minute fine uneven portions 40 are distributed in the interface between the colored transparent layer 20 and the transparent substrate 10.

In addition, when the minute concave and convex portions 40 are formed in a line shape and the direction thereof is a certain direction, reflected light of surface reflection and surface reflection is strongly reflected in a direction perpendicular to the direction.

Examples of the material of the colored transparent layer 20 include a vinyl chloride resin, a vinyl chloride-vinyl acetate copolymer resin, an acrylic resin, a polycarbonate resin, an amorphous polyester resin, a polypropylene resin, an acrylonitrile- Butadiene-styrene resin, and polyacrylonitrile resin. The coloring ink and the like are not particularly limited, but an organic pigment is preferable. The coloring transparent layer 20 is a color-clear coating film and has a transparent coloring. The color of the coloring agent 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 mu m or more and 30 mu m or less.

The hue of the colored transparent layer 20 is not particularly limited, but a design of a predetermined color can be visually confirmed by a combination of the hue of the colored transparent layer 20 and the shape of the fine concave-convex portion 40.

Examples of the material of the black layer 30 include a vinyl chloride resin, a vinyl chloride-vinyl acetate copolymer resin, an acrylic resin, a polycarbonate resin, an amorphous polyester resin, a polypropylene resin, an acrylonitrile- Butadiene-styrene resin, and polyacrylonitrile resin. The coloring method is not particularly limited, but it can be colored black by carbon black or the like.

Although the thickness of the black layer 30 is not particularly limited, it is preferably 1 mu m or more and 60 mu m or less.

The black layer 30 is a black base coating film and functions as a light absorbing layer.

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

In the decorative material 100, the fine concavo-convex portion 40 is formed on the lower surface of the transparent substrate 10. That is, the fine concavo-convex portion 40 exists between the transparent substrate 10 and the colored transparent layer 20. As a result, light incident on the decorative material 100 from the side of the transparent substrate 10 is partially reflected by the fine concave-convex portion 40, so that a clear pattern can be obtained at a position corresponding to the fine convexo-concave portion 40. Further, the black layer 30 absorbs the light, thereby obtaining a darkness having a depth and a high-quality feeling. As a result, the decorative material 100 can be realized in which a beautiful aesthetic appearance can not be obtained in the past, and a clear colored appearance can be obtained in the background color having a feeling of blackness.

Details will be described with reference to Figs. 1 and 9. Fig.

Fig. 1 is a cross-sectional view for explaining the principle when light enters a decorative material according to the embodiment. Fig. Fig. 9 is a cross-sectional view for explaining the principle when light is incident on a layered product of a conventional transparent substrate and a colored transparent layer.

9, incident light (white light) L1 incident on the upper surface of the transparent substrate 10 of the layered product 300 passes through the transparent substrate 10 and then passes through the colored transparent layer 20 The light is divided into either the transmitted light L2 or the surface reflected light L3 (o) which is slightly reflected on the upper surface of the colored transparent layer 20 or the absorbed light L4 absorbed in the colored transparent layer 20.

Conversely, the irradiated light L5 incident on the lower surface of the colored transparent layer 20 also passes through the colored transparent layer 20 in the same manner as the incident light L1, and then transmitted through the transparent substrate 10, (Not shown) that is slightly reflected at the lower surface of the base material 10, or absorbed light (not shown) that is absorbed into the transparent base material 10.

That is, when the stacked body 300 is viewed from the upper surface of the transparent substrate 10, the hue of the colored transparent layer 20 is formed by the transmitted light L2, the reflected light L3 (o), and the transmitted light L6, . However, since the light energy of the reflected light L3 (o) is about 1%, which is much smaller than that of the transmitted light L2 and the transmitted light L6, even if the wavelength range is smaller than the transmitted light L2 and transmitted light L6, . Therefore, the transmitted light L2 and the transmitted light L6 are visually confirmed as a main color.

To this end, the decorative member 100 adopts the structure shown in Fig. 1 as its sectional structure. That is, the decorative material 100 is incident on the upper surface of the transparent substrate 10 and a part of the incident light transmitted through the transparent substrate 10 is reflected by the fine concave-convex portion 40 and is emitted outside the transparent substrate 10, A part of the light is transmitted through the colored transparent layer 20 to reach the black layer 30 and absorbed. This will be described in detail below.

1, the decorative material 100 is provided with a black layer 30 on the lower surface of the colored transparent layer 20 and a fine concavo-convex portion 40 formed on a part of the lower surface of the transparent substrate 10 . The incident light L1 incident on the upper surface of the transparent substrate 10 passes through the transparent substrate 10 and then passes through the colored transparent layer 20 to absorb light L7 absorbed in the black layer 30, L3 (o)] reflected by the upper surface of the colored transparent layer 20 and the reflected light L3 (eo) reflected by the fine concave-convex portion 40 or absorbed light L4 ). In this case, the transmitted light (L2) shown in Fig. 9 is absorbed light L7.

On the contrary, the irradiation light L5 incident on the lower surface of the black layer 30 is not present because it is absorbed by the black layer 30.

Here, the fine concavo-convex portion 40 is formed on a part of the lower surface of the transparent substrate 10. The micro concavo-convex portion 40 can significantly increase the reflected light amount of the reflected light L3 (eo) reflected by the fine concave-convex portion 40 more than the reflected light L3 (o). The reflected light [L3 (eo)] in which the light amount is increased in this way can be visually confirmed.

Therefore, when the decorative material 100 is viewed from the upper surface of the transparent substrate 10, a part of the incident light L1 is reflected by the fine concave-convex portion 40 to become the reflected light L3 (eo) Looks clear. On the other hand, since the reflected light [L3 (o)] is hardly recognized by the naked eye, black with a sense of blackness is visually confirmed as the background of the design.

In this way, a decorative material 100 can be realized which can be visually confirmed by providing a beautiful aesthetic appearance without conventionally, rendering a dark, background color, and a clear, three-dimensional design.

Next, a method of manufacturing the decorative material 100 in the present embodiment will be described.

The decorative material 100 can be manufactured, for example, as follows.

First, a transparent substrate 10 having a flat surface is prepared, and a fine concave-convex portion 40 is formed on the top surface of the transparent substrate 10. Next, a colored transparent ink or coating material is applied on the transparent substrate 10 to form a colored transparent layer 20, and then a black ink or paint is applied to form the black layer 30 in that order.

As a method of forming the fine concavo-convex portion 40, a method of rough surface processing is used. Particularly, at least one of matting, hairline processing, groove processing, wrinkle processing, and diffraction grating processing is preferable.

Further, a decorative article comprising the decorative material 100 on its surface is obtained. For example, since a pattern of a deep hue is obtained with a background of black, it can be applied to high-grade painted articles such as a cellular phone, a personal computer, a housing of a liquid crystal television and the like, in which a highly decorative surface coating has recently started to be required. It is also used in high-end consumer products. In addition, it can be used as a decorative material for interior decoration that is useful as a special wallpaper such as automobile painting and has a high-quality feeling. A known method can be used for surface coating.

The decorative material according to the present invention and the method for producing the decorative material are not limited to the above-described embodiments, and various modifications are possible.

In the above embodiment, a large concave portion 41 is formed in the first region 401, but a large convex portion having a height of 5 占 퐉 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 concavo-convex portion 40, and preferably the maximum width is 1 占 퐉 or more. Further, the fine concavo-convex portion 40 may be provided on the outer wall surface of the large convex portion. The same effect as that of the large concave portion 41 can be obtained by such a large convex portion. The first region 401 may be formed with either a large concave portion 41 or a large convex portion or both.

Hereinafter, the present invention will be described in detail with reference to Examples of the present invention.

(Experiment 1)

The following experiment was conducted using the first embodiment.

(Embodiment 1)

A blue color clear layer (KKY 440 Blue made by Seiko Advantage Co., Ltd.) and a black layer (KKY 710 Black made by Seiko Advantage Co., Ltd.) were sequentially formed on a transparent substrate using polycarbonate by silk screen printing And the film was laminated. A pattern of a ring-shaped hairline was formed by a UV-curable resin on the pattern, and this was placed on a transparent substrate to obtain a decorative material (1).

Fig. 2 shows an appearance image when the decorative material 1 obtained was irradiated with light from the transparent substrate side. As shown in Fig. 2, a pattern of spot shape (red purplish color) indicated by white in the background color of dark black appeared and could be visually confirmed in three dimensions.

The state of fine unevenness formed on the surface of the transparent substrate of the decorative material 1 was measured. As a result of observing the surface shape of the decorative material 1 using the laser microscope VK-9500 manufactured by KANSS Co., Ltd., it was possible to calculate that the average interval of large concave portions periodically formed was about 50 탆 pitch. The maximum height Ry at the reference length of 250 占 퐉 and the arithmetic average height Ra of the fine unevenness corresponding to the positions where the pattern was visually observed were?

(Reference Example 1)

A color clear layer colored by KKY 440 Blue made by Seiko Advanced Co. was prepared and the spectral transmittance distribution (spectrum distribution of L2) was measured. In this case, the measured spectrum corresponds to the spectrum of L2 shown in Fig.

The results are shown in Fig.

As shown in FIG. 3, the spectrum had a peak (transmission 50%) at 490 nm and a FWHM (full width at half maximum) around 490 nm was about 120 nm.

3, it is understood that the light incident on the color clear layer is transmitted in a region of FWHM 120 nm (370 nm to 610 nm) centered at 490 nm, and is mostly not transmitted in a region of 580 nm to 740 nm there was. Further, the peak of the transmittance was about 50%, and the color tone became clear.

(Second Reference Example)

The spectral reflectance distribution (spectrum distribution of L6) of the two-layered body of the color clear layer and the white reflector colored by KKY 440 Blue manufactured by Seiko Advanced Incorporated was measured. In this case, the measured spectrum corresponds to the spectrum of L6 shown in Fig. This measurement is equivalent to the case where L2 and L5 in Fig. 1 are almost equal to each other, and it becomes a reciprocal transmission.

The results are shown in Fig.

As shown in Fig. 4, the spectrum had a peak at 470 nm (reflection 53%, reflectivity from a white reflector 100%), and FWHM centered at 470 nm was about 90 nm. In addition, there was a slight amount of reflected light from 560 nm on the longer wavelength side, a gentle peak around 620 nm and 720 nm, and a reflectance after 740 nm.

Unlike the case of Fig. 3, it was found that the full width at half maximum decreased to approximately 90 nm, and that reflected light was present at a long wavelength side from 560 nm. In addition, it was found that the amount of reflected light corresponds to L3 (o) in Fig. 9, so that slight surface reflection and surface reflection are generated on the upper surface of the color clear layer.

(Third Reference Example)

(Spectral distribution of L3 (o) or L3 (eo)) of a two-layered body of a color clear layer and a black layer colored by KKY 440 Blue made 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 this measurement, as described with reference to Fig. 1, there is no incident light from the back surface (lower surface) of the black layer at all.

The results are shown in Fig.

As shown in Fig. 5, the reflectance was about 1%. In addition, there was a peak where the reflectance was relatively large in the vicinity of 420 nm, in the vicinity of 620 nm, in the vicinity of 720 nm and after 740 nm. The peak in the vicinity of 420 nm is a gentle portion of the blue region which is the dominant wavelength region.

The result of synthesis of these four peak lights was red purple. This was the same color as the shape of the spot shape indicated by white in Fig.

As shown in Figs. 3 to 5, the transmitted light of the color clear layer is absorbed in the black layer to visually confirm the background color of black, and the surface reflection at the upper surface of the color clear layer and the surface layer reflection are strengthened at the fine uneven portions A clear decoration can be visually confirmed, and a decorative material suitable for realizing a decoration with a sense of quality can be obtained.

(Experiment 2)

The following experiment was conducted using the second embodiment shown below.

(Second Embodiment)

Except that a color clear layer colored with a dark blue transparent ink (VIC CONQU 400 Ultra Blue manufactured by Seiko Advantage Co., Ltd.) was used in place of the blue color clear layer used in the first embodiment. A coating film was laminated in the same manner. In addition, a pattern was formed by radiating a hairline processing state of a linear shape with an ultraviolet curable resin, and this was placed on a transparent substrate to obtain a decorative material.

The spectral distribution of the spectral reflectance distribution [L3 (o) or L3 (eo)] of the obtained decorative material (hereinafter referred to as "black light") was measured. In this case, the measured spectrum corresponds to the spectrum of L3 (o) or L3 (eo) shown in Fig.

The results are shown in Fig. 6 as " black light ".

(Fourth Reference Example)

(Spectral distribution of L2) (hereinafter referred to as " transmitted light ") of a two-layered body of a color clear layer and a transparent substrate colored by a deep blue transparent ink (VIC Conk 400 Ultra Blue manufactured by Seiko Advantage Co., Ltd.) A spectral reflectance distribution (spectrum distribution of L6) (hereinafter referred to as " reflected light ") was measured. In this case, the measured spectrum corresponds to the spectrum of L2 and L6 shown in Fig.

The results are shown in Fig.

As shown in Fig. 6, the transmitted light has almost no light quantity at wavelengths other than the wavelength range exhibiting the main hue, but the transmittance is about 10% as shown in the ordinate on the left, because the color is dark. The reflected light has a reflectance of about 1% as shown in the vertical axis on the left side in the range other than the dominant wavelength range. This is reflected light due to surface reflection of the color clear layer and surface reflection.

As shown in Fig. 6, the spectrum distribution of the black-and-white light was a very low reflectance (%) as shown on the right ordinate. However, it was found that it had the same peak as the spectrum of the reflected light of the color clear layer.

From the above, the color of the pattern area visually confirmed by enhancing the surface reflection of the color clear layer and the reflection of the surface layer reflects the color of red, which is a very deep color tone of about 730 nm or more and blue of about 480 nm, It was confirmed by naked eyes that reddish purple mixed orange color and orange color overlapped 660 nm.

Further, the spectral spectra of L3 (o) and L3 (eo) were obtained from the measurement values shown in Fig. 6 by the calculation formula.

The results are shown in Fig.

The transmittance distribution in Fig. 6 is the spectral spectrum of the transmitted light L2 in Fig. 9, and is given by the following equation (1).

Transmission ratio distribution of transmitted light (L2) = Wavelength distribution of incident light (L1) Transmissivity distribution of transparent substrate × Transmittance distribution of color clear layer (One)

Similarly, the reflectance distribution in Fig. 6 is measured by providing a white reflector on the rear side of the color clear layer in Fig. 9, and is given by the following equation (2).

Reflectance distribution of the reflected light L3 (o) of the color-clear layer + transmittance distribution of the transmitted light L6 = reflectance distribution of the reflected light L3 (o) of the color- Transmittance distribution x Reflectance distribution of white reflector x Transmittance distribution of transmitted light (L2) (2)

The spectral spectra of the reflected lights L3 (o) and L3 (eo) shown in Fig. 1 from the above equations (1) and (2) are given by the following equation (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 Distribution of transmitted 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 were almost the same, and it was found that the principle of color development explained in FIGS. 1 and 9 was the same.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view for explaining the principle when light enters a decorative material according to the embodiment; Fig.

2 is an external view showing a decorative material according to the present embodiment.

3 is a view showing a spectral transmittance distribution L2;

4 is a diagram showing a spectral reflectance distribution [L3 (o) + L6];

5 is a diagram showing a spectral reflectance distribution [L3 (o)] according to this embodiment.

6 is a diagram showing spectral characteristics.

7 is a view showing spectral characteristics obtained by calculation;

8 is an enlarged cross-sectional view of a fine uneven portion.

9 is a cross-sectional view for explaining the principle when light is incident on a laminate of a transparent substrate and a colored transparent layer.

Description of the Related Art

The present invention relates to a decorative sheet comprising a decorative material and a transparent substrate, wherein the transparent decorative sheet comprises a transparent colored layer, a colored transparent layer, a black colored layer, a black concavo-convex portion, L1: incident light, L2, L6: transmitted light, L3: reflected light, L4, L7: absorbing light, L5:

Claims (9)

A transparent substrate having a fine concavo-convex portion on one side, A colored transparent layer formed on the surface having fine concavo-convex portions on the transparent substrate, And a black layer formed on the colored transparent layer, When the incident light is irradiated on the other side of the transparent substrate, a colored pattern is formed at a position corresponding to the fine convexo-concave portion in the background color of black, Wherein the arithmetic mean roughness (Ra) of the fine concavo-convex portion is 0.05 占 퐉 to 5 占 퐉 (0.05 占 퐉 to 5 占 퐉) as calculated by a method defined in JIS B0601. delete A transparent substrate having a fine concavo-convex portion on one side, A colored transparent layer formed on the surface having fine concavo-convex portions on the transparent substrate, And a black layer formed on the colored transparent layer, When the incident light is irradiated on the other side of the transparent substrate, a colored pattern is formed at a position corresponding to the fine convexo-concave portion in the background color of black, Wherein the fine concavo-convex portion has a first region in which at least one of a large concave portion having a depth of 5 占 퐉 or more and a large convex portion having a height of 5 占 퐉 or more is formed and a second region in which at least one of the large concave portion and the large convex portion is not formed Lt; / RTI > Wherein the arithmetic mean roughness (Ra) of the fine concavo-convex portion in the second region is 0.05 占 퐉 to 5 占 퐉 (0.05 占 퐉 to 5 占 퐉) as calculated by a method defined in JIS B0601. The optical device according to claim 3, wherein an arithmetic mean roughness (Ra) of at least one of an inner wall surface of the large concave portion and an outer wall surface of the large convex portion is 0.05 占 퐉 to 5 占 퐉 (0.05 占 퐉 or more 5 탆 or less). The decorative material according to claim 1, wherein the fine uneven portion is formed only on a part of the transparent substrate. The decorative material according to claim 1, wherein the transparent material comprises at least one of a transparent resin plate, a glass plate, and a transparent ceramic plate. The decorative material according to claim 1, wherein the fine uneven portion is at least one of a mat shape, a hairline shape, a groove shape, a wrinkle shape, and a diffraction grating shape. The decorative material according to claim 1, wherein the fine uneven portion is formed on the surface of the transparent substrate with an ultraviolet curable resin. A decorative article comprising the surface of the decorative material according to any one of claims 1 to 8.

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