JP6913287B2 - Veneer - Google Patents

Description

The present invention relates to decorative boards such as furniture panels, doors and housings of white goods.

For furniture panels, doors and housings of white goods, materials such as resin, wood or metal are appropriately selected and used in consideration of various necessary items such as decorativeness, scratch resistance, processability or cost. ing.

Patent Document 1 discloses a front plate in which a colored layer is provided on the back surface of a glass plate as a constituent member of a furniture plate. The colored layer is formed by directly adhering one color or two or more color inks directly to the back surface of the glass plate by printing, or a colored plastic film, paper, aluminum foil, or the like adhered to the glass plate. , Aluminum and the like formed as a metal vapor deposition film are disclosed.

Jikkai Sho 61-86047

However, even if a decorative board is manufactured with the configuration described in Patent Document 1 and used for a decorative board for doors and housings of white goods, furniture panels, etc., various reflective colors can be obtained while making the best use 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 reflected colors while making the best use of the texture of glass.

The decorative plate of the present invention includes 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 that.

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, it is preferable that the first interference layer is 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.

The decorative board of the present invention preferably further includes 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 one or more kinds selected from the group consisting of Ti, Nb, Ni, Cr and Al. It is preferably made of an alloy containing the above 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 reflected colors while making the best use of the texture of glass.

It is a schematic cross-sectional view of the decorative board which concerns on one Embodiment of this invention. It is a schematic cross-sectional view of the decorative board which concerns on another embodiment of this invention. It is a schematic cross-sectional view of the decorative board which concerns on another embodiment of this invention. It is a figure which showed the reflectance spectrum of the decorative board of Example 1. FIG. It is a figure which showed the reflectance spectrum of the decorative board of Example 2. It is a figure which showed the reflectance spectrum of the decorative board of Example 3. It is a figure which showed the reflectance spectrum of the decorative board of Example 4. It is a figure which showed the reflectance spectrum of the decorative board of Example 5. It is a figure which showed the reflectance spectrum of the decorative board of Example 6. It is a figure which showed the reflectance spectrum of the decorative board of Example 7. It is a figure which showed the reflectance spectrum of the decorative board of Comparative Example 1. FIG. It is a figure which showed the reflectance spectrum of the decorative board of Comparative Example 2.

Hereinafter, an example of a preferred embodiment in which the present invention has been carried out will be described. However, the following embodiments are merely examples. The present invention is not 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 is a glass substrate 2, a metal layer 3 provided on one main surface (back surface 2b) of the glass substrate 2, and a first interference layer provided between the glass substrate 2 and the metal layer 3. It is composed of 4. The decorative plate 1 is used so that the front surface 2a of the glass substrate 2 faces the outside (viewer side) and the back surface 2b faces the inside.

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, non-alkali glass, and tempered glass are used. In particular, it is preferable to use non-alkali glass or tempered glass because it is excellent in 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 a metal or an 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 can be 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 that it is made of a metal selected from the group consisting of Ti and Nb. Good heat resistance can be obtained by forming the metal layer 3 from a metal selected from the group consisting of Ti and Nb.

The film thickness of the metal layer 3 is preferably in the range of 50 to 200 nm. If the film thickness of the metal layer 3 becomes too thin, it becomes difficult to reflect the light incident from the glass substrate 2 side, so that it becomes difficult to obtain the decorative plate 1 having a metallic appearance. Further, when it is used for a housing of an electronic device or the like, the internal structure thereof is easily visible, and the aesthetic appearance of the decorative board 1 may be spoiled. Further, even if the film thickness of the metal layer 3 becomes too thick, the technical effect associated therewith cannot be obtained, which is economically disadvantageous, which is not preferable.

The first interference layer 4 is composed of a metal oxide, a metal nitride, a metal oxynitride, or a metal, and is formed from the glass substrate 2 side at the interface between the glass substrate 2 and the first interference layer 4. It has a function of reflecting a part of the incident light. Due to 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 glass substrate 2 at the interface between the first interference layer 4 A decorative plate 1 that causes optical interference with the reflected light and exhibits various reflected colors from bluish to red depending on the material of the metal layer 3 and the material and geometrical thickness of the first interfering layer 4. Is obtained. The reflected 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 and L shown in (1).
L = 2nd / cosθ ・ ・ ・ (1)
Here, n is the refractive index of the first interference layer 4, d is the geometric 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. It is an emission angle from the interface between the glass substrate 2 and the first interference layer 4 when light is incident on the interface between the two.

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 has a geometric thickness of 25 nm or more and 170 nm or less. More preferably, it is particularly preferable to have a geometric thickness of 30 nm or more and 160 nm or less. If the geometric thickness of the first interference layer 4 is too small or too large, optical interference is less likely to occur, and thus coloring tends to be difficult.

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 of the first interference layer 4 at a wavelength of 550 nm is 3 or more, which is much larger than the refractive index of air, the glass substrate 2 is between the glass substrate 2 and the first interference layer 4 at a certain incident angle. When light is incident on the interface of the above, the emission angle and θ from the interface between the glass substrate 2 and the first interference layer 4 can be significantly reduced, so that the optical path length difference shown in the equation (1) can be reduced. L can be reduced. Further, even if the incident angle is changed, the amount of change in the exit angle and θ can be reduced, so that the dependence of the optical path length difference on the incident angle can be reduced. Therefore, the reflected color of the decorative plate 1 is less likely to change even if the viewing angle is changed. In particular, silicon is preferable because it has a small attenuation coefficient in the visible wavelength region and various reflected colors can be easily obtained. Further, the same effect can be obtained even if the first interference layer 4 contains other elements such as aluminum and boron in mass% up to 15% 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 geometric 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 preferable, and it 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 geometric thickness of the first interference layer 4 becomes too small, optical interference is less likely to occur, and thus it is difficult to color. On the other hand, if the geometric thickness of the first interference layer 4 becomes too large, the absorption of visible light by the first interference layer 4 becomes too large, and it becomes difficult to express various reflected colors.

Hereinafter, another example of a preferred embodiment of the present invention will be described. In the following description, members having substantially the same function as the above-described embodiment will be referred to by a common reference numeral, and the description thereof will be omitted.

FIG. 2 is a schematic cross-sectional view of the 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 composed of a metal oxide, a metal nitride, a metal oxynitride, or a metal, and at the interface between the first interference layer 4 and the second interference layer 5, the glass substrate 2 It has a function of reflecting a 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, the first Since optical interference occurs between the interference layer 4 and the reflected light at the interface between the second interference layers 5, a decorative plate 1 exhibiting more various reflected colors can be obtained.

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 has a thickness of 25 nm or more and 170 nm or less. More preferably, it is particularly preferable to have a geometric thickness of 30 nm or more and 160 nm or less. If the geometric thickness of the second interference layer 5 is too small or too large, optical interference is less likely to occur, and thus coloring tends to be difficult.

FIG. 3 is a schematic cross-sectional view of the 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 composed of a metal oxide, a metal nitride, a metal oxynitride, or a metal, and at the interface between the first interference layer 4 and the third interference layer 6, the glass substrate 2 It has a function of reflecting a part of the light incident from the side. The reflected light at the metal layer 3 (the interface between the metal layer 3 and the first interference layer 4), the reflected light at the interface between the glass substrate 2 and the third interference layer 6, and the first interference layer. Since optical interference occurs between the 4 and the reflected light at the interface between the third interference layer 6, the decorative plate 1 exhibiting more various reflected colors can be obtained.

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 has a thickness of 25 nm or more and 170 nm or less. More preferably, it is particularly preferable to have a geometric thickness of 30 nm or more and 160 nm or less. If the geometric thickness of the third interference layer 6 is too small or too large, optical interference is less likely to occur, and thus coloring tends to be difficult.

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 composed of a metal oxide, a metal nitride, a metal oxynitride or a metal, and is an interface between the first interference layer 4 and the fourth interference layer and a third interference layer 6. At the interface between the interference layer and the fourth interference layer, a decorative plate 1 having a function of reflecting a part of light incident from the glass substrate 2 side and exhibiting various reflected colors can be obtained.

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

In the present invention, the method for 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 of them is based on a known thin film forming method. Can be formed. Examples of the method for 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 include a sputtering method, a vacuum deposition method, and an ion plating method. Examples thereof include a physical vapor deposition method and a chemical vapor deposition (CVD) method. Among them, the sputtering method is preferably used.

The decorative plate 1 may be provided with an antifouling film for preventing fingerprints from adhering and imparting water repellency and oil repellency on the other main surface (surface 2a) of the glass substrate 2.

The antifouling film preferably contains a fluorine-containing silane compound in the composition for forming an antifouling film, and is prepared by coating with a silane compound solution having a fluoroalkyl group or a fluoroalkyl ether group. In particular, it is preferable that the fluorine-containing silane compound is silazane or alkoxysilane. Further, among the silane compounds having a fluoroalkyl group or a fluoroalkyl ether group, the fluoroalkyl group in the silane compound is bonded to the Si atom at a ratio of 1 or less with respect to 1 Si atom, and the rest. Is preferably a silane compound which is a hydrolyzable group or a siloxane binding group. The hydrolyzable group referred to here is, for example, an alkoxy group or the like, which becomes a hydroxyl group by hydrolysis, whereby the silane compound forms a polycondensate.

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, and the present invention is appropriately modified without changing the gist thereof. It is possible to do.

(Example 1)
The film material shown in Table 1 is used for one main surface of a glass substrate (thickness 2 mm) made of soda lime glass, and the first interference layer and the metal layer are formed so as to have the geometric thickness shown in Table 1. Each of them was formed in order by a sputtering method to obtain a decorative plate of Example 1.

(Evaluation of color tone)
With respect to the obtained decorative plate, from the glass substrate side, a spectrophotometer U-4100 (manufactured by Hitachi) was used, and the incident angle of the incident light was set to 0 ° or 45 ° with respect to the normal of the reflecting surface. Each normal reflectance was measured to obtain a reflectance spectrum. FIG. 4 shows the reflectance spectrum of the decorative board of Example 1. From the obtained reflectance spectrum ^{, the values of L *} , a ^* , and b ^* when the D65 light source in the color system of ^{L *} a ^* b ^* specified in JIS Z 8781-4 are used are obtained for each incident angle. , The difference in the value ^{of a *} at each incident angle was calculated as ^{Δa *} , and the difference in the value ^{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 *,} the smaller the angle dependence of the color tone change. These results are shown in Table 1.

(Example 2)
A decorative plate was obtained in the same manner as in Example 1 above, except that silicon was formed as the first interference layer by a sputtering method so as to have a geometric thickness of 55 nm. The regular reflectance of the obtained decorative board was measured in the same manner as in Example 1 to obtain a reflectance spectrum. FIG. 5 shows the reflectance spectrum of the decorative board of Example 2. ^L * from the obtained reflectance spectrum in ^{the L} * ^a * ^{b *} color ^system, a *, ^{b *} values of obtained for each angle of incidence, Δa ^*, Δb ^*, was calculated [Delta] C ^*. These results are shown in Table 1.

(Example 3)
As the first interference layer, niobium oxide was formed by a sputtering method so as to have a geometric thickness of 120 nm, and further, as a second interference layer, silicon was formed by a sputtering method so as to have a geometric thickness of 50 nm. A decorative plate was obtained in the same manner as in Example 1 above, except that it was formed between the first interference layer and the metal layer. The regular reflectance of the obtained decorative board was measured in the same manner as in Example 1 to obtain a reflectance spectrum. FIG. 6 shows the reflectance spectrum of the decorative board of Example 3. ^L * from the obtained reflectance spectrum in ^{the L} * ^a * ^{b *} color ^system, a *, ^{b *} values of obtained for each angle of incidence, Δa ^*, Δb ^*, was calculated [Delta] C ^*. These results are shown in Table 1.

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

(Example 4)
As the first interference layer, silicon was formed by a sputtering method so as to have a geometric thickness of 50 nm, and further, as a second interference layer, niobium oxide was formed by a sputtering method so as to have a geometric thickness of 120 nm. A decorative plate was obtained in the same manner as in Example 1 above, except that it was formed between the first interference layer and the metal layer. The regular reflectance of the obtained decorative board was measured in the same manner as in Example 1 to obtain a reflectance spectrum. FIG. 7 shows the reflectance spectrum of the decorative board of Example 4. ^L * from the obtained reflectance spectrum in ^{the L} * ^a * ^{b *} color ^system, a *, ^{b *} values of obtained for each angle of incidence, Δa ^*, Δb ^*, was calculated [Delta] C ^*. These results are shown in Table 1.

(Example 5)
As the first interference layer, silicon was formed by a sputtering method so as to have a geometric thickness of 66 nm, and as a metal layer, niobium was formed by a sputtering method so as to have a geometric thickness of 100 nm. As the third interference layer, the same as in Example 1 above except that niobium oxide was formed between the first interference layer and the glass substrate by a sputtering method so as to have a geometric thickness of 76 nm. I got a veneer. The regular reflectance of the obtained decorative board was measured in the same manner as in Example 1 to obtain a reflectance spectrum. FIG. 8 shows the reflectance spectrum of the decorative board of Example 5. ^L * from the obtained reflectance spectrum in ^{the L} * ^a * ^{b *} color ^system, a *, ^{b *} values of obtained for each angle of incidence, Δa ^*, Δb ^*, was calculated [Delta] C ^*. These results are shown in Table 2.

(Example 6)
As the fourth interference layer, the same as in Example 5 above, except that silicon oxide is formed between the first interference layer and the third interference layer by a sputtering method so as to have a geometric thickness of 26 nm. I got a veneer. The regular reflectance of the obtained decorative board was measured in the same manner as in Example 1 to obtain a reflectance spectrum. FIG. 9 shows the reflectance spectrum of the decorative board of Example 6. ^L * from the obtained reflectance spectrum in ^{the L} * ^a * ^{b *} color ^system, a *, ^{b *} values of obtained for each angle of incidence, Δa ^*, Δb ^*, was calculated [Delta] C ^*. These results are shown in Table 2.

(Example 7)
As the first interference layer, niobium oxide was formed by a sputtering method so as to have a geometric thickness of 33 nm, and as the second interference layer, silicon oxide was formed by a sputtering method so as to have a geometric thickness of 12 nm. It was formed between the first interference layer and the metal layer, and as the third interference layer, between the first interference layer and the glass substrate by a sputtering method so that niobium oxide had a geometric thickness of 45 nm. As a fourth interference layer, silicon oxide was formed between the first interference layer and the third interference layer by a sputtering method so as to have a geometric thickness of 91 nm. A decorative board was obtained in the same manner as in Example 5 above. The regular reflectance of the obtained decorative board was measured in the same manner as in Example 1 to obtain a reflectance spectrum. FIG. 10 shows the reflectance spectrum of the decorative board of Example 7. ^L * from the obtained reflectance spectrum in ^{the L} * ^a * ^{b *} color ^system, a *, ^{b *} values of obtained for each angle of incidence, Δa ^*, Δb ^*, was calculated [Delta] C ^*. These results are shown in Table 2.

(Comparative Example 1)
Without providing the first interference layer, the second interference layer, and the third interference layer, titanium was formed as a metal layer by a sputtering method so as to have a geometric thickness of 100 nm to obtain a decorative plate. .. The regular reflectance of the obtained decorative board was measured in the same manner as in Example 1 to obtain a reflectance spectrum. FIG. 11 shows the reflectance spectrum of the decorative board of Comparative Example 1. ^L * from the obtained reflectance spectrum in ^{the L} * ^a * ^{b *} color ^system, a *, ^{b *} values of obtained for each angle of incidence, Δa ^*, Δb ^*, was calculated [Delta] C ^*. These results are shown in Table 2.

(Comparative Example 2)
A decorative plate was obtained in the same manner as in Comparative Example 1 above, except that niobium was formed as a metal layer by a sputtering method so as to have a geometric thickness of 100 nm. The regular reflectance of the obtained decorative board was measured in the same manner as in Example 1 to obtain a reflectance spectrum. FIG. 12 shows the reflectance spectrum of the decorative board of Comparative Example 2. ^L * from the obtained reflectance spectrum in ^{the L} * ^a * ^{b *} color ^system, a *, ^{b *} values of obtained for each angle of incidence, Δa ^*, Δb ^*, was calculated [Delta] C ^*. These results are shown in Table 2.

The decorative boards of Examples 1 to 3 had a brownish reflective color appearance. In particular, the decorative board of Example 2 had a ^{small ΔC *} of 1.4, and even if the viewing angle was changed, the color change could not be visually recognized. Further, the decorative board of Example 4 had the appearance of a wine red-based reflective color. Further, the decorative board of Example 5 has the appearance of a light blue-based reflected color, and has a ^{small ΔC *} of 1.8, so that the color change cannot be visually recognized even if the viewing angle is changed. rice field. Further, the decorative board of Example 6 has the appearance of a champagne gold-based reflected color, and has a ^{small ΔC *} of 1.9, so that the color change cannot be visually recognized even if the viewing angle is changed. rice field. Further, the decorative board of Example 7 had the appearance of a pinkish 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 boards for furniture panels, doors, housings, etc. of white goods.

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 (10)

With 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 is provided .
Wherein the first interference layer, the decorative plate, wherein Der Rukoto refractive index of 3 or more at a wavelength of 550 nm. 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 board according to claim 1 or 2 , wherein the first interference layer is made of silicon. The decorative board according to any one of claims 1 to 3, wherein the first interference layer has a geometric thickness of 10 nm or more and 100 nm or less. The decorative plate according to any one of claims 1 to 4, further comprising a second interference layer provided between the first interference layer and the metal layer. The decorative board according to claim 5 , wherein the second interference layer has a geometric thickness of 10 nm or more and 200 nm or less. The decorative plate according to any one of claims 1 to 6 , further comprising a third interference layer provided between the first interference layer and the glass substrate. The decorative board according to claim 7 , wherein the third interference layer has a geometric 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 veneer according to any one of claims 1 to 8 , wherein the veneer is characterized by the above. The decorative board according to any one of claims 1 to 9 , wherein the metal layer has a geometric thickness of 50 nm or more and 200 nm or less.

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