JPWO2018030355A1 - Decorative plate - Google Patents

Abstract

To provide a decorative board capable of expressing various reflection colors while making use of the texture of glass. Providing a glass substrate, a first interference layer provided on one main surface of the glass substrate, and a metal layer provided on the surface of the first interference layer opposite to the glass substrate It will be a decorative panel to be characterized.

Description

  The present invention relates to a decorative panel such as a panel of furniture, a door of white goods, a housing, and the like.

  Materials such as resin, wood or metal are appropriately selected and used in consideration of various necessary matters such as decorativeness, scratch resistance, processability or cost for panels of furniture, doors of white goods, casings, etc. ing.

  Patent Document 1 discloses a front plate having a colored layer provided on the back surface of a glass plate as a component of a furniture plate. As a colored layer, what was formed by making color ink of one color or two or more colors adhere directly to the back of a glass plate by printing, what adhered a colored plastic film or paper, or aluminum foil etc. to a glass plate , And those formed as metal deposition films such as aluminum.

Japanese Utility Model Publication No. 61-86047

  However, even if a decorative board is manufactured with the configuration described in Patent Document 1 and used as a decorative board for white goods such as doors and casings, panels of furniture, etc., various reflection colors can be obtained while taking advantage of the texture of glass. There was a problem that it could not be expressed.

  An object of the present invention is to provide a decorative board capable of expressing various reflection colors while making use of the texture of glass.

  The decorative board of the present invention comprises a glass substrate, a metal layer provided on one main surface of the glass substrate, and a first interference layer provided between the glass substrate and the metal layer. It is characterized by

  In the decorative board of the present invention, the first interference layer preferably has a thickness of 10 nm or more and 200 nm or less.

  In the decorative board of the present invention, the first interference layer preferably has a refractive index of 3 or more at a wavelength of 550 nm.

  In the decorative board of the present invention, the first interference layer is preferably made of silicon.

  In the decorative board of the present invention, the first interference layer preferably has a thickness of 10 nm or more and 100 nm or less.

  In the decorative board of the present invention, it is preferable to further comprise a second interference layer provided between the first interference layer and the metal layer.

  In the decorative board of the present invention, the second interference layer preferably has a thickness of 10 nm or more and 200 nm or less.

  In the decorative board of the present invention, the metal layer is a metal selected from the group consisting of Ti, Nb, Ni, Cr and Al, or at least one selected from the group consisting of Ti, Nb, Ni, Cr and Al It is preferable to consist of an alloy containing the following metals.

  In the decorative board of the present invention, the metal layer preferably has a thickness of 50 nm or more and 200 nm or less.

  According to the present invention, it is possible to provide a decorative board capable of expressing various reflection colors while making use of the texture of glass.

It is a typical sectional view of a decorative board concerning one embodiment of the present invention. It is a typical sectional view of a decorative board concerning another embodiment of the present invention. It is a typical sectional view of a decorative board concerning another embodiment of the present invention. It is the figure which showed the reflectance spectrum of the decorative board of Example 1. FIG. It is the figure which showed the reflectance spectrum of the decorative board of Example 2. FIG. It is the figure which showed the reflectance spectrum of the decorative board of Example 3. FIG. It is the figure which showed the reflectance spectrum of the decorative board of Example 4. FIG. It is the figure which showed the reflectance spectrum of the decorative board of Example 5. FIG. It is the figure which showed the reflectance spectrum of the decorative board of Example 6. FIG. It is the figure which showed the reflectance spectrum of the decorative board of Example 7. FIG. It is the figure which showed the reflectance spectrum of the decorative board of the comparative example 1. FIG. It is the figure which showed the reflectance spectrum of the decorative board of the comparative example 2. FIG.

  Hereinafter, an example of the preferable form which implemented this invention is demonstrated. However, the following embodiments are merely illustrative. The present invention is not at all limited to the following embodiments.

  FIG. 1 is a schematic cross-sectional view of a decorative board 1 according to an embodiment of the present invention. The decorative plate 1 includes a glass substrate 2, a metal layer 3 provided on one main surface (rear surface 2 b) of the glass substrate 2, and a first interference layer provided between the glass substrate 2 and the metal layer 3. It consists of four. The decorative plate 1 is used with the front surface 2a of the glass substrate 2 facing outward (viewer side) and the back surface 2b facing inward.

  The glass substrate 2 is not particularly limited as long as it is transparent glass, and for example, silica glass, borosilicate glass, soda lime glass, alkali-free glass, and tempered glass are used. In particular, it is preferable to use non-alkali glass or tempered glass because of excellent scratch resistance and mechanical strength. The thickness of the glass substrate 2 is not particularly limited. The thickness of the glass substrate 2 can be, for example, about 0.01 mm to 3 mm. The glass substrate 2 may be a rigid body, but may have flexibility.

  The metal layer 3 is made of metal or alloy, and has a function of reflecting light incident from the glass substrate 2 side. By providing the metal layer 3, a decorative board 1 having a metallic appearance is obtained. The metal layer 3 is made of a metal selected from the group consisting of Ti, Nb, Ni, Cr and Al, or an alloy containing one or more metals selected from the group consisting of Ti, Nb, Ni, Cr and Al. It is preferable, and it is more preferable to consist of a metal selected from the group consisting of Ti and Nb. By forming the metal layer 3 from a metal selected from the group consisting of Ti and Nb, good heat resistance can be obtained.

  The film thickness of the metal layer 3 is preferably in the range of 50 to 200 nm. When the film thickness of the metal layer 3 becomes too thin, the light incident from the glass substrate 2 side becomes difficult to reflect, so it becomes difficult to obtain the decorative board 1 having the metallic appearance. Moreover, when using for the housing | casing etc. of an electronic device, the internal structure is easy to be visually recognized and the beauty of the decorative board 1 may be impaired. In addition, even if the film thickness of the metal layer 3 is too thick, the technical effects associated therewith can not be obtained, which is economically disadvantageous, which is not preferable.

The first interference layer 4 is made of metal oxide, metal nitride, metal oxynitride or metal, and in the interface between the glass substrate 2 and the first interference layer 4, from the glass substrate 2 side It has a function of reflecting a part of the incident light. By the first interference layer 4, the reflected light at the metal layer 3 (the interface between the metal layer 3 and the first interference layer 4) and the light reflected at the interface between the glass substrate 2 and the first interference layer 4 An optical interference occurs with the reflected light, and the decorative board 1 exhibits various reflection colors from bluish to reddish depending on the material of the metal layer 3 and the material and geometrical thickness of the first interference layer 4 Is obtained. The reflection color is an expression between the reflected light at the interface between the metal layer 3 and the first interference layer 4 and the reflected light at the interface between the glass substrate 2 and the first interference layer 4. It is determined according to the optical path length difference L shown in (1).
L = 2nd / cosθ (1)
Here, n is the refractive index of the first interference layer 4, d is the geometrical thickness of the first interference layer 4, and θ is the glass substrate 2 to the glass substrate 2 and the first interference layer 4. The angle of emergence from the interface between the glass substrate 2 and the first interference layer 4 when light is incident on the interface between them.

  The first interference layer 4 preferably has a geometric thickness of 10 nm or more and 200 nm or less, more preferably 20 nm or more and 180 nm or less, and preferably 25 nm or more and 170 nm or less. More preferably, it has a geometrical thickness of 30 nm or more and 160 nm or less. Even if the geometrical thickness of the first interference layer 4 is too small or too large, optical interference is less likely to occur, and therefore, it tends to be difficult to be colored.

  The first interference layer 4 preferably has a refractive index of 3 or more at a wavelength of 550 nm. Examples of those having a refractive index of 3 or more at a wavelength of 550 nm include silicon and germanium. When the refractive index at a wavelength of 550 nm of the first interference layer 4 is 3 or more, which is much larger than the refractive index of air, between the glass substrate 2 and the first interference layer 4 from the glass substrate 2 at a certain incident angle. When light is incident on the interface, the emission angle θ from the interface between the glass substrate 2 and the first interference layer 4 can be significantly reduced, so the optical path length difference shown in equation (1), L can be reduced. Further, even if the incident angle is changed, the amount of change of the output angle and θ can be reduced, so that the incident angle dependency of the optical path length difference can be reduced. Therefore, even if the viewing angle is changed, the reflection color of the decorative board 1 becomes difficult to change. In particular, silicon is preferable because the attenuation coefficient in the visible wavelength range is small, and various reflected colors are easily obtained. Also, the first interference layer 4 can obtain the same effect even if it contains up to 15% by mass of other elements such as aluminum and boron in addition to silicon.

  When the first interference layer 4 has a refractive index of 3 or more at a wavelength of 550 nm, the geometrical thickness of the first interference layer 4 is preferably 10 nm or more and 100 nm or less, and is 20 nm or more and 90 nm or less Is more preferably 25 nm or more and 85 nm or less, and particularly preferably 30 nm or more and 80 nm or less. If the geometrical thickness of the first interference layer 4 is too small, it is difficult to cause optical interference, so it is difficult to color. On the other hand, if the geometrical thickness of the first interference layer 4 becomes too large, the absorption of visible light in the first interference layer 4 becomes too large, which makes it difficult to express various reflection colors.

  Hereinafter, another example of the preferred embodiment of the present invention will be described. In the following description, members having substantially the same functions as those of the above-described embodiment are referred to by the same reference numerals, and the description thereof is omitted.

  FIG. 2 is a schematic cross-sectional view of a decorative board 1 according to another embodiment of the present invention. A second interference layer 5 is provided between the first interference layer 4 and the metal layer 3.

  The second interference layer 5 is made of metal oxide, metal nitride, metal oxynitride or metal, and the glass substrate 2 is formed at the interface between the first interference layer 4 and the second interference layer 5. It has a function of reflecting part of the light incident from the side. In addition to the reflected light at the metal layer 3 (the interface between the metal layer 3 and the second interference layer 5) and the reflected light at the interface between the glass substrate 2 and the first interference layer 4, a first Since optical interference occurs between the interference layer 4 and the reflected light at the interface between the second interference layer 5, the decorative board 1 can be obtained which exhibits more various reflection colors.

  The second interference layer 5 preferably has a geometric thickness of 10 nm or more and 200 nm or less, more preferably 20 nm or more and 180 nm or less, and geometrically have a thickness of 25 nm or more and 170 nm or less More preferably, it has a geometrical thickness of 30 nm or more and 160 nm or less. Even if the geometrical thickness of the second interference layer 5 is too small or too large, optical interference is less likely to occur, and therefore, it tends to be difficult to be colored.

  FIG. 3 is a schematic cross-sectional view of a decorative board 1 according to another embodiment of the present invention. A third interference layer 6 is provided between the first interference layer 4 and the glass substrate 2.

  The third interference layer 6 is made of metal oxide, metal nitride, metal oxynitride or metal, and the glass substrate 2 is formed at the interface between the first interference layer 4 and the third interference layer 6. It has a function of reflecting part of the light incident from the side. Reflected light at the metal layer 3 (interface between the metal layer 3 and the first interference layer 4), reflected light at the interface between the glass substrate 2 and the third interference layer 6, and the first interference layer Since the optical interference occurs between the reflection light at the interface between the fourth interference layer 6 and the third interference layer 6, the decorative board 1 can be obtained that exhibits more various reflection colors.

  The third interference layer 6 preferably has a geometric thickness of 10 nm or more and 200 nm or less, more preferably 20 nm or more and 180 nm or less, and geometrically have a thickness of 25 nm or more and 170 nm or less More preferably, it has a geometrical thickness of 30 nm or more and 160 nm or less. Even if the geometrical thickness of the third interference layer 6 is too small or too large, optical interference is less likely to occur, and therefore, it tends to be difficult to be colored.

  In the present invention, a fourth interference layer (not shown) may be provided between the first interference layer 4 and the third interference layer 6. The fourth interference layer is made of metal oxide, metal nitride, metal oxynitride or metal, and the interface between the first interference layer 4 and the fourth interference layer and the third interference layer 6 The fourth embodiment has a function of reflecting a part of light incident from the glass substrate 2 side at the interface between the second interference layer and the fourth interference layer, and the decorative board 1 can be obtained which exhibits various reflection colors.

  The fourth interference layer preferably has a geometric thickness of 10 nm or more and 200 nm or less, more preferably 20 nm or more and 180 nm or less, and geometrically have a thickness of 25 nm or more and 170 nm or less Is more preferable, and it is particularly preferable to have a geometrical thickness of 30 nm or more and 160 nm or less. If the geometrical thickness of the fourth interference layer is too small or too large, optical interference is less likely to occur, so that it tends to be difficult to express various reflection colors.

  In the present invention, the method of forming the metal layer 3, the first interference layer 4, the second interference layer 5, the third interference layer 6, and the fourth interference layer is not particularly limited, and each may be formed by a known thin film forming method. It can be formed. As a method of forming the metal layer 3, the first interference layer 4, the second interference layer 5, the third interference layer 6, and the fourth interference layer, for example, a sputtering method, a vacuum evaporation method, an ion plating method, etc. Physical vapor deposition, chemical vapor deposition (CVD), and the like. Among them, sputtering is preferably used.

  In the decorative plate 1, an antifouling film for preventing adhesion of a fingerprint and imparting water repellency and oil repellency may be provided on the other main surface (surface 2 a) of the glass substrate 2.

  The antifouling film preferably contains a fluorine-containing silane compound in the antifouling film-forming composition, and is prepared by coating a fluoroalkyl group or a fluoroalkyl ether group-containing silane compound solution. In particular, the fluorine-containing silane compound is preferably silazane or alkoxysilane. Further, among the above-mentioned silane compounds having a fluoroalkyl group or a fluoroalkyl ether group, a fluoroalkyl group in the silane compound is bonded to a Si atom at a ratio of one or less to one Si atom, and the rest Is preferably a silane compound which is a hydrolyzable group or a siloxane bond group. The hydrolyzable group referred to herein is, for example, a group such as an alkoxy group, which becomes a hydroxyl group by hydrolysis, whereby the silane compound forms a polycondensate.

  EXAMPLES Hereinafter, the present invention will be described in more detail based on specific examples, but the present invention is not limited to the following examples at all, and the present invention is appropriately modified without changing the gist of the present invention. It is possible.

Example 1
Using the film materials shown in Table 1 on one main surface of a glass substrate (thickness 2 mm) made of soda lime glass, the first interference layer and the metal layer are made to have the geometrical thickness shown in Table 1. The decorative plate of Example 1 was obtained in order by sputtering respectively.

(Evaluation of color tone)
About the obtained decorative plate, using a spectrophotometer U-4100 (manufactured by Hitachi) from the glass substrate side, the incident angle of incident light is set to 0 ° or 45 ° with respect to the normal to the reflecting surface, Each regular reflectance was measured to obtain a reflectance spectrum. The reflectance spectrum of the decorative board of Example 1 is shown in FIG. From the obtained reflectance spectrum, the values of L ^* , a ^* and b ^* when using the D65 light source in the L ^* a ^* b ^* color system specified in JIS Z 8781-4 are determined for each incident angle The difference between the values of a ^* at each incident angle was calculated as Δa ^* , and the difference between the values of b ^* at each incident angle was calculated as Δb ^* . ^{Then, ΔC * = ((Δa *} ) 2 + (Δb *) 2)) was calculated [Delta] C that is defined ^{* 1/2.} The smaller the value of ΔC ^* is, the smaller the angle dependency of the color tone change is. The results are shown in Table 1.

(Example 2)
A decorative board was obtained in the same manner as in Example 1 except that silicon was formed by sputtering to have a geometrical thickness of 55 nm as a first interference layer. The specular reflectance of the obtained decorative board was measured in the same manner as in Example 1 to obtain a reflectance spectrum. The reflectance spectrum of the decorative board of Example 2 is shown in FIG. The values of L ^* , a ^* and b ^{* in} the L ^* a ^* b ^* color system were determined from the obtained reflectance spectra for respective incident angles, and Δa ^* , Δb ^* and ΔC ^* were calculated. The results are shown in Table 1.

(Example 3)
As a first interference layer, niobium oxide is formed by sputtering so as to have a geometrical thickness of 120 nm, and as a second interference layer, silicon is sputtered so as to have a geometrical thickness of 50 nm Thus, a decorative board was obtained in the same manner as in Example 1 except that it was formed between the first interference layer and the metal layer. The specular reflectance of the obtained decorative board was measured in the same manner as in Example 1 to obtain a reflectance spectrum. The reflectance spectrum of the decorative board of Example 3 is shown in FIG. The values of L ^* , a ^* and b ^{* in} the L ^* a ^* b ^* color system were determined from the obtained reflectance spectra for respective incident angles, and Δa ^* , Δb ^* and ΔC ^* were calculated. The results are shown in Table 1.

The decorative board of Example 3 has an a ^* value of 6.6 and an b ^* value of 35.8 at an incident angle of 0 °, and an a ^* value of 2.4 and b ^{* at} an incident angle of 45 °. The value was 30.6. ΔC ^* was 6.7.

(Example 4)
Silicon was sputtered to a geometric thickness of 50 nm as a first interference layer, and niobium oxide was sputtered to a geometric thickness of 120 nm as a second interference layer. Thus, a decorative board was obtained in the same manner as in Example 1 except that it was formed between the first interference layer and the metal layer. The specular reflectance of the obtained decorative board was measured in the same manner as in Example 1 to obtain a reflectance spectrum. The reflectance spectrum of the decorative board of Example 4 is shown in FIG. The values of L ^* , a ^* and b ^{* in} the L ^* a ^* b ^* color system were determined from the obtained reflectance spectra for respective incident angles, and Δa ^* , Δb ^* and ΔC ^* were calculated. The results are shown in Table 1.

(Example 5)
Silicon was sputtered to a geometric thickness of 66 nm as the first interference layer, niobium was sputtered to a geometric thickness of 100 nm as a metal layer, and The third interference layer is the same as in Example 1 except that niobium oxide is formed between the first interference layer and the glass substrate by sputtering so as to have a geometrical thickness of 76 nm. I got a decorative board. The specular reflectance of the obtained decorative board was measured in the same manner as in Example 1 to obtain a reflectance spectrum. The reflectance spectrum of the decorative board of Example 5 is shown in FIG. The values of L ^* , a ^* and b ^{* in} the L ^* a ^* b ^* color system were determined from the obtained reflectance spectra for respective incident angles, and Δa ^* , Δb ^* and ΔC ^* were calculated. The results are shown in Table 2.

(Example 6)
As the fourth interference layer, it is the same as the above-mentioned Example 5 except that silicon oxide is formed between the first interference layer and the third interference layer by sputtering so as to have a geometrical thickness of 26 nm. I got a decorative board. The specular reflectance of the obtained decorative board was measured in the same manner as in Example 1 to obtain a reflectance spectrum. The reflectance spectrum of the decorative board of Example 6 is shown in FIG. The values of L ^* , a ^* and b ^{* in} the L ^* a ^* b ^* color system were determined from the obtained reflectance spectra for respective incident angles, and Δa ^* , Δb ^* and ΔC ^* were calculated. The results are shown in Table 2.

(Example 7)
As the first interference layer, niobium oxide is formed by sputtering so as to have a geometrical thickness of 33 nm, and as the second interference layer, silicon oxide is formed by sputtering so as to have a geometrical thickness of 12 nm Between the first interference layer and the glass substrate by sputtering so that niobium oxide is formed to a geometrical thickness of 45 nm as a third interference layer, which is formed between the first interference layer and the metal layer Furthermore, as the fourth interference layer, silicon oxide is formed between the first interference layer and the third interference layer by sputtering so as to have a geometrical thickness of 91 nm. A decorative board was obtained in the same manner as in Example 5 above. The specular reflectance of the obtained decorative board was measured in the same manner as in Example 1 to obtain a reflectance spectrum. The reflectance spectrum of the decorative board of Example 7 is shown in FIG. The values of L ^* , a ^* and b ^{* in} the L ^* a ^* b ^* color system were determined from the obtained reflectance spectra for respective incident angles, and Δa ^* , Δb ^* and ΔC ^* were calculated. The results are shown in Table 2.

(Comparative example 1)
The first interference layer, the second interference layer, and the third interference layer were not provided, and titanium was formed as a metal layer by a sputtering method so as to have a geometrical thickness of 100 nm to obtain a decorative plate. . The specular reflectance of the obtained decorative board was measured in the same manner as in Example 1 to obtain a reflectance spectrum. The reflectance spectrum of the decorative board of the comparative example 1 is shown in FIG. The values of L ^* , a ^* and b ^{* in} the L ^* a ^* b ^* color system were determined from the obtained reflectance spectra for respective incident angles, and Δa ^* , Δb ^* and ΔC ^* were calculated. The results are shown in Table 2.

(Comparative example 2)
A decorative board was obtained in the same manner as in Comparative Example 1 except that niobium was formed as a metal layer by sputtering so as to have a geometrical thickness of 100 nm. The specular reflectance of the obtained decorative board was measured in the same manner as in Example 1 to obtain a reflectance spectrum. The reflectance spectrum of the decorative board of the comparative example 2 is shown in FIG. The values of L ^* , a ^* and b ^{* in} the L ^* a ^* b ^* color system were determined from the obtained reflectance spectra for respective incident angles, and Δa ^* , Δb ^* and ΔC ^* were calculated. The results are shown in Table 2.

The decorative boards of Examples 1 to 3 had a brown-based reflective color appearance. In particular, in the decorative board of Example 2, ΔC ^* was as small as 1.4, and even if the viewing angle was changed, the color change could not be recognized visually. Moreover, the decorative board of Example 4 had the appearance of the wine red type reflective color. In addition, the decorative board of Example 5 has the appearance of a light blue-based reflection color, and ΔC ^* is as small as 1.8, and even if the viewing angle is changed, the change in color can not be recognized visually The In addition, the decorative board of Example 6 has an appearance of a champagne gold-based reflective color, and has a small ΔC ^* of 1.9, and even if the viewing angle is changed, the change in color can not be recognized visually The Moreover, the decorative board of Example 7 had the appearance of a pink-type reflective color. On the other hand, Comparative Examples 1 and 2 all had a silver-based appearance.

  The decorative board of the present invention is suitable for decorative panels of furniture panels, doors of white goods, casings, etc.

1: Decorative plate 2: Glass substrate 2a: Front surface 2b: Back surface 3: Metal layer 4: First interference layer 5: Second interference layer 6: Third interference layer

Claims (11)

With a glass substrate,
A metal layer provided on one main surface of the glass substrate;
A decorative board comprising: a first interference layer provided between the glass substrate and the metal layer.   The decorative board according to claim 1, wherein the first interference layer has a geometric thickness of 10 nm or more and 200 nm or less.   The decorative plate according to claim 1 or 2, wherein the first interference layer has a refractive index of 3 or more at a wavelength of 550 nm.   The decorative board according to claim 3, wherein the first interference layer is made of silicon.   The decorative board according to claim 3 or 4, wherein the first interference layer has a geometrical thickness of 10 nm or more and 100 nm or less.   The decorative board according to claim 1, further comprising a second interference layer provided between the first interference layer and the metal layer.   The decorative board according to claim 6, wherein the second interference layer has a geometrical thickness of 10 nm or more and 200 nm or less.   The decorative board according to any one of claims 1 to 7, further comprising a third interference layer provided between the first interference layer and the glass substrate.   The decorative board according to claim 8, wherein the third interference layer has a geometrical thickness of 10 nm or more and 200 nm or less.   The metal layer is made of a metal selected from the group consisting of Ti, Nb, Ni, Cr and Al, or an alloy containing one or more metals selected from the group consisting of Ti, Nb, Ni, Cr and Al The decorative board as described in any one of the Claims 1-9 characterized by the above-mentioned.   The decorative sheet according to any one of claims 1 to 10, wherein the metal layer has a geometric thickness of 50 nm or more and 200 nm or less.

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