Decorative member
阅读说明：本技术 装饰构件 (Decorative member ) 是由 金容赞 金起焕 许南瑟雅 孙政佑 曹弼盛 于 2019-06-14 设计创作，主要内容包括：本申请涉及一种装饰构件,其包括：显色层,显色层包括光反射层和设置在光反射层上的光吸收层；以及基板,基板设置在显色层的一个表面上,其中,光吸收层包括铜镍氧化物(Cu<Sub>a</Sub>Ni<Sub>b</Sub>O<Sub>x</Sub>)。(The present application relates to a decoration member, which includes: a color-developing layer, a light-emitting layer,the color development layer comprises a light reflection layer and a light absorption layer arranged on the light reflection layer; and a substrate disposed on one surface of the color developing layer, wherein the light absorbing layer comprises copper nickel oxide (Cu) a Ni b O x )。)
1. A trim member comprising:
a color-expression layer including a light-reflecting layer and a light-absorbing layer disposed on the light-reflecting layer; and
a substrate disposed on one surface of the color-expression layer,
wherein the light absorption layer comprises copper nickel oxide (Cu)aNibOx) And is and
when composition analysis is performed with respect to any point of the light absorption layer, ω represented by the following equation 1 is in the range of 0.71 to 3,
[ equation 1]
ω＝(Tx)×(σx)
[ equation 2]
f(T1)＝f(T1+n×T0)
[ equation 3]
In equation 1, TxIs represented by f (T)1) Dependence of the function represented on T1N represents a positive integer of 1 or more, and σxAs is represented by the above equation 3,
in equation 2 above, T1Represents the thickness of the light-absorbing layer including any point of the light-absorbing layer at which the composition analysis is performed, and T0Is 60nm, and
in the above equation 3, a means an element content ratio of copper (Cu), b means an element content ratio of nickel (Ni), and x means an element content ratio of oxygen (O).
2. The trim member of claim 1 wherein Tx is in the range of 0.51 to 1.
3. The trim member of claim 1 wherein σ is greater than or equal toxIn the range of 0.1 to 5.
4. The decorative member according to claim 1, wherein a hue angle h in a CIE LCh color space of the light absorbing layer is in a range of 105 ° to 315 °.
5. The decoration member according to claim 1 wherein,
the light reflection layer is composed of a single layer or a plurality of layers including one or two types of materials selected from the group consisting of indium (In), titanium (Ti), tin (Sn), silicon (Si), germanium (Ge), aluminum (Al), copper (Cu), nickel (Ni), vanadium (V), tungsten (W), tantalum (Ta), molybdenum (Mo), neodymium (Nb), iron (Fe), chromium (Cr), cobalt (Co), gold (Au), and silver (Ag), and one or two or more types of materials selected from the group consisting of oxides, nitrides, or oxynitrides thereof, and a carbon and carbon composite.
6. The decoration member according to claim 1 wherein, the light absorption layer has a refractive index in the range of 0 to 8 at a wavelength of 400 nm.
7. The decoration member according to claim 1 wherein, the light absorption layer has an extinction coefficient of more than 0 and less than or equal to 4 at a wavelength of 400 nm.
8. The decoration member according to claim 1 wherein, the light absorption layer includes two or more dots having different thicknesses.
9. The trim member of claim 1 wherein the color appearance layer further comprises a colored film.
10. The trim member according to claim 1, wherein the color-expressing layer or the substrate comprises a pattern layer.
11. The decoration member according to claim 10 wherein, the pattern layer comprises a convex shape or a concave shape having a cross section of an asymmetric structure.
12. The trim member according to claim 1, wherein dichroism of Δ Ε ab >1 is provided.
13. The decoration member according to claim 1 wherein, the substrate comprises a plastic injection molding for a cosmetic case or a glass substrate.
14. The decoration member according to claim 13 wherein, the plastic injection-molded part comprises at least one of polypropylene (PP), Polystyrene (PS), polyvinyl acetate (PVAc), polyacrylate, polyethylene terephthalate (PET), polyvinyl chloride (PVC), polymethyl methacrylate (PMMA), ethylene-vinyl acetate copolymer (EVA), Polycarbonate (PC), polyamide and styrene-acrylonitrile copolymer (SAN).
Technical Field
The present application claims priority and benefit of korean patent application No. 10-2018-.
The present application relates to a decoration member.
Background
In cosmetic containers, various mobile devices, and home appliances, product designs (e.g., colors, shapes, and patterns) play a great role in increasing product value for users in addition to product functions. Product preferences and price also depend on the design.
As an example, in the case of a compact cosmetic case, various colors and color senses are realized in various methods and applied to a product. There are methods of providing color to the housing material itself and methods of attaching decorative films that achieve color and shape to the housing material to provide a design.
Color rendering in existing decorative films is achieved by methods including printing, deposition, and the like. When a variety of colors are presented on a single surface, the colors should be printed more than twice, and when it is desired to apply various colors to a three-dimensional pattern, it is practically difficult to achieve representation of the colors. Further, in the existing decorative film, the color is fixed according to the viewing angle, and even if there is a slight change, the change is limited to different degrees of the color sensation.
[ Prior art documents ]
[ patent document ]
Patent document 1: korean patent unexamined publication No. 10-2010-0135837
Disclosure of Invention
Technical problem
The present application is directed to a trim member.
Technical scheme
The present specification provides a decoration member, including: a color-expression layer including a light-reflecting layer and a light-absorbing layer disposed on the light-reflecting layer; and a substrate disposed on one surface of the color expression layer, wherein the light absorption layer comprises copper nickel oxide (Cu)aNibOx) And when the composition analysis is performed at any one point of the light absorbing layer, ω represented by the following
[ equation 1]
ω＝(Tx)×(σx)
[ equation 2]
f(T1)＝f(T1+n×T0)
[ equation 3]
In
in equation 2 above, T1Indicating any point of composition analysis including the light-absorbing layerThickness of the light absorbing layer, and T0Is 60nm, and
in the above equation 3, a means an element content ratio of copper (Cu), b means an element content ratio of nickel (Ni), and x means an element content ratio of oxygen (O).
Advantageous effects
According to an embodiment of the present specification, the decoration member includes a light absorption layer in which the content of each element is adjusted at a specific ratio in addition to copper nickel oxide, thereby expressing a cool tone color.
Provided is a decorative member having dichroism that shows different colors depending on a viewing direction, and having improved visibility of the dichroism.
Drawings
Fig. 1 illustrates a trim member according to an embodiment of the present description.
Fig. 2 illustrates a method for distinguishing between a light absorbing layer and a light reflecting layer.
Fig. 3 shows one point of the light absorption layer and the thickness of the light absorption layer including the one point.
Fig. 4 shows the principle of light interference in the light absorbing layer and the light reflecting layer.
Fig. 5 to 13 show a decoration member according to an embodiment of the present invention.
Fig. 14 to 31 show the shape of the pattern layer.
Fig. 32 and 33 show a warm tone and a cool tone.
Fig. 34 shows colors according to an evaluation example (color evaluation).
Fig. 35 is a graph according to equation 2.
Detailed Description
Hereinafter, the present specification will be described in detail.
In this specification, unless otherwise defined, "or" means "and/or" when "or" selectively includes the listed items or includes all of the listed items.
In the present specification, "layer" means covering 70% or more of the area where the layer is present. Preferably, "layer" means covering 75% or more, more preferably, covering 80% or more.
In this specification, the "thickness" of a layer refers to the shortest distance from the lower surface to the upper surface of the layer.
In the present specification, the color represented by the decoration member may be defined by the spectral characteristics of the light source, the reflectance of the target, and the color observation efficiency of the observer.
For a target color representation, the color needs to be measured with a standard light source and a standard observer and expressed in coordinates of a color space. The color of the decoration member may be represented by CIE Lab (L a b) coordinates or LCh coordinates providing a visually uniform color space. L denotes brightness, + a denotes red, + a denotes green, + b denotes yellow, b denotes blue, and C and h will be described later. The total color difference in color space according to the viewing position can be expressed as
The color measurement may employ a spectrophotometer (CM-2600d, manufactured by konica minolta limited), and the reflectance of the sample may be optically analyzed by the spectrophotometer and the reflectance of each wavelength may be expressed, and thus, a spectral reflectance graph and converted color coordinates may be obtained. In this case, data was obtained at a viewing angle of 8 degrees, and the decoration member was measured in the horizontal and vertical directions to observe dichroism of the decoration member.
The viewing angle, which is an angle formed by a straight line d1 in the normal direction of the surface of the color-expression layer of the decoration member and a straight line d2 passing through the spectrophotometer and one point of the decoration member to be measured, is generally in the range of 0 to 90 degrees.
The case where the viewing angle is 0 degrees means that measurement is performed in the same direction as the normal direction of the surface of the color expression layer of the decoration member.
In this specification, "the light absorbing layer" and "the light reflecting layer" are layers having relative physical properties, the light absorbing layer may refer to a layer having a higher light absorption rate than the light reflecting layer, and the light reflecting layer may refer to a layer having a higher light reflectance than the light absorbing layer.
Each of the light absorbing layer and the light reflecting layer may be composed of a single layer, or a multilayer of two or more layers.
In this specification, the light absorbing layer and the light reflecting layer are named according to their functions. With respect to light having a specific wavelength, a layer reflecting relatively more light may be represented by a light reflecting layer, and a layer reflecting relatively less light may be represented by a light absorbing layer.
Fig. 1 illustrates a laminated structure of a decoration member according to an embodiment of the present specification. In fig. 1, a decorative member comprising a color-
The light absorbing layer and the light reflecting layer will be described by fig. 2. In the decoration member of fig. 2, L is expressed based on the light input directioni-1Layer, LiLayer and Li+1Sequence of layers are stacked and interface IiAt Li-1Layer and LiBetween layers, interface Ii+1At LiLayer and Li+1Between the layers.
When light having a specific wavelength is irradiated in a direction perpendicular to the layers so that thin film interference does not occur, the interface IiThe reflectivity can be expressed by the
[ equation 1]
In
By applying
[ equation 2]
Hereinafter, a decoration member including the above-described light reflection layer and light absorption layer will be described.
The present specification provides a decoration member, including: a color-expression layer including a light-reflecting layer and a light-absorbing layer disposed on the light-reflecting layer; and a substrate disposed on one surface of the color expression layer, wherein the light absorption layer comprises copper nickel oxide (Cu)aNibOx) And when the composition analysis is performed at any one point of the light absorbing layer, ω represented by the
[ equation 1]
ω＝(Tx)×(σx)
[ equation 2]
f(T1)＝f(T1+n×T0)
[ equation 3]
In
in equation 2 above, T1Represents the thickness of the light-absorbing layer including any point of the light-absorbing layer subjected to the composition analysis, and T0Is 60nm, and
in the above equation 3, a means the element content ratio of copper (Cu), b means the element content ratio of nickel (Ni), and x means the element content ratio of oxygen (O). For example, when the contents of copper (Cu), nickel (Ni), and oxygen (O) at one point are 57.5%, 9.8%, and 39.7%, respectively, a, b, and c may be expressed as 0.575, 0.098, and 0.397, respectively.
In the present specification, the content ratio of the specific element may refer to an atomic percentage (at%) of the specific element at any point of the light absorption layer on which the composition analysis is performed.
In the decoration member according to the embodiment of the present specification, the light absorption layer includes copper nickel oxide (Cu)aNibOx) By controlling the content ratio of each element of the copper nickel oxide and adjusting the thickness of the light absorbing layer to a specific range, a cool tone can be observed through the light absorbing layer. In this case, the relational expression between the content ratio of the elements of the copper nickel oxide and the thickness of the light absorbing layer can be expressed by the cold tone parameter ω expressed by the
In the embodiments of the present specification, regarding any point x of the light absorbing layer, ω represented by the
In the present specification, "any point of the light absorbing layer" may refer to any point on the surface or inside of the light absorbing layer.
In the examples of the present specification, TxThe thickness parameter represented by equation 2 above is represented. In the light absorbing layer, the warm tone or the cool tone changes in thickness and the thickness has a predetermined period T0Are alternately displayed and the color is changed. In this case, TxMay mean the thickness T of the light absorption layer at any point1Predetermined period T from the thickness of the light absorption layer0The ratio of. For example, when the predetermined period of the thickness is 60nm, T at the time when the thickness of the light absorbing layer is 60nm, 120nm and 180nmxThe values are all 1.
In equation 2 above, T1The thickness of the light-absorbing layer at any point including the light-absorbing layer is shown. T is1Refers to the thickness of the light absorbing layer including one point when one point of the light absorbing layer is selected. When the cross section of the decoration member is observed by a Scanning Electron Microscope (SEM) or the like, the interface between the light reflection layer and the light absorption layer can be confirmed, and the layer containing the copper nickel oxide can be confirmed to be the light absorption layer by the composition analysis. In this case, any point of the light absorbing layer may be selected, and the thickness of the light absorbing layer including any point may be calculated and used as T1。
Equation 2 above shows the thickness T according to the light absorption layer1Periodic function f (T)1). According to the period T0Show the same f (T)1) The value is obtained. This is shown in fig. 35. According to FIG. 35, at (0 < T)1≤T0) F (T) occurring within the range of (1)1) At a constant period T0And appears repeatedly. E.g. at T1＝0.5T0F (0.5T) in the case of (1)0) And at T1＝0.5T0+T0F (1.5T) in the case of (2)0) With the same value of 0.5.
In an embodiment of the present specification, a, b, and x may be the same as or different from each other, and each of a, b, and x may have a value greater than 0 and less than 1.
According to embodiments of the present description, it is possible to establish that a + b + x is 1.
Thickness T1It may refer to a length of the light absorbing layer in a thickness direction thereof in a cross section in a direction perpendicular to a surface direction of the light absorbing layer while including any point of the light absorbing layer.
Fig. 3 illustrates a method for determining a point and thickness of the light absorbing layer. When any point (red point of fig. 3) of the light absorbing layer is selected, the content ratio parameter represented by equation 3 is calculated by the composition analysis of the point, and the width of a line segment perpendicular to the surface direction of the light absorbing layer among line segments passing through the point is calculated to calculate the thickness T1。
In addition, T may be achieved by adjusting a process pressure for deposition, a flow rate of a reaction gas with respect to a plasma gas, a voltage, a deposition time, or a temperature when forming the light absorbing layer1。
In the decorative member of the present invention, the cool tone or the warm tone repeatedly appears at a constant cycle according to the thickness variation of the light absorbing layer. In this case, T0It can be expressed as "the thickness period of the light absorbing layer in which the cool tone repeatedly appears".
The composition analysis of the light-absorbing layer may be conducted by transmission X-ray composition analysis.
In the above equation 3, a means the element content ratio of copper (Cu), b means the element content ratio of nickel (Ni), and x means the element content ratio of oxygen (O). The element content ratio of each element in the light absorbing layer may be measured by a method generally used in the art to which the present technology belongs, and the element content ratio may be measured using X-ray photoelectron spectroscopy (XPS) or electron spectroscopy for chemical analysis (ESCA, siemmer siemens).
According to embodiments of the present description, the thickness parameter TxMay be in the range of 0.51 to 1, preferably in the range of 0.6 to 1, more preferably in the range of 0.65 to 1. When this numerical range is satisfied, a cool tone can be more clearly observed in the decorative member.
In the examples of the present specification, the content ratio parameter σxMay be in the range of 0.1 to 5, 0.1 to 3, 0.1 to 1.5 and 1 to 1.5, more preferably, in the range of 1.1 to 1.3. When this numerical range is satisfied, a cool tone can be more clearly observed in the decorative member. The ratio between the elements can be achieved by controlling the gas fraction during the deposition of the copper nickel oxide.
Specifically, using X-ray photoelectron spectroscopy (XPS) or electronic spectroscopy for chemical analysis (ESCA, seemer feishel technologies ltd), full spectrum scanning is performed in the surface and thickness directions of the light absorbing layer and qualitative analysis is performed, and then quantitative analysis is performed by narrow spectrum scanning. In this case, a full spectrum scan and a narrow spectrum scan were obtained under the conditions of table 1 below to perform qualitative analysis and quantitative analysis. The peak background (peak background) employs an intelligent (smart) scheme.
[ Table 1]
Element(s)
Scan interval binding energy
Step size
Narrow spectrum scan (Snapshot)
20.89eV
0.1eV
Full spectrum scanning
-10～1350 eV
1eV
In addition, before the decorative member is laminated, the composition analysis may be performed by preparing the light absorbing layer fragments having the same composition as the light absorbing layer. Alternatively, when the structure of the decoration element is a substrate/pattern layer/light reflection layer/light absorption layer, the outermost edge of the decoration element may be analyzed by the above-described method. Further, the light absorbing layer can be visually confirmed by observing a cross-sectional photograph of the decorative member. For example, when the structure of the decoration member is a substrate/pattern layer/light reflection layer/light absorption layer, it can be confirmed that there is an interface between layers in a cross-sectional photograph of the decoration member, and the outermost edge insulating layer corresponds to the light absorption layer.
In embodiments of the present description, the hue angle h in the CIE LCh color space of the light absorbing layer may be in the range of 105 ° to 315 °, in the range of 120 ° to 305 °, in the range of 135 ° to 305 °, in the range of 150 ° to 305 °, or in the range of 200 ° to 305 °.
When the hue angle h is within this range, a cool tone can be observed from the decorative member. Cool hue means that the value range is satisfied in the CIE LCh color space. Fig. 32 shows colors corresponding to warm tones, and fig. 33 shows colors corresponding to cool tones.
In embodiments of the present description, L in the CIE LCh color space of the light absorbing layer may be in the range of 0 to 100 or 30 to 100.
In embodiments of the present description, C in the CIE LCh color space of the light absorbing layer may be in the range of 0 to 100, 1 to 80, or 1 to 60.
In the present specification, the CIE LCh color space is a CIE Lab color space, where the cartesian coordinates a and b are replaced with the cylindrical coordinates C (chromaticity, relative saturation), L (distance from the L-axis), and h (hue angle, hue angle in the CIE Lab hue circle).
In the embodiments of the present specification, preferably, the refractive index n of the light absorbing layer at a wavelength of 400nm may be in the range of 0 to 8, in the range of 0 to 7, in the range of 0.01 to 3, or in the range of 2 to 2.5. The refractive index n can be calculated as sin θ a/sin θ b (θ a denotes the angle of light incident on the surface of the light absorbing layer, and θ b denotes the angle of refraction of light within the light absorbing layer).
In the embodiments of the present specification, preferably, the refractive index n of the light absorbing layer in the wavelength range of 380nm to 780nm may be in the range of 0 to 8, in the range of 0 to 7, in the range of 0.01 to 3, or in the range of 2 to 2.5.
In the embodiments of the present specification, the extinction coefficient k of the light absorbing layer at a wavelength of 400nm may be in the range of 0 or more and 4 or less, preferably, in the range of 0.01 to 4, in the range of 0.01 to 3.5, in the range of 0.01 to 3, or in the range of 0.1 to 1. The extinction coefficient k represents- λ/4 π I (dI/dx) (where the extinction coefficient represents the unit length dx of the path in the light-absorbing layer, e.g., a value obtained by multiplying the fraction dI/I of the decrease in light intensity per meter by λ/4 π, where λ represents the wavelength of the light).
In the embodiments of the present specification, preferably, the extinction coefficient k of the light absorbing layer in the wavelength range of 380nm to 780nm may be in the range of 0 or more and 4 or less, in the range of 0.01 to 4, in the range of 0.01 to 3.5, in the range of 0.01 to 3, or in the range of 0.1 to 1. Since the extinction coefficient k is in the entire visible light wavelength range of 400nm or 380nm to 780nm, the entire visible light wavelength range of 400nm or 380nm to 780nm can be used as the light absorbing layer in the visible light range.
As described above, the color representation principle of the light absorbing layer having a specific extinction coefficient and refractive index is different from that of the decorative member that represents color by adding a dye to a conventional substrate. For example, the case of using a scheme of absorbing light by adding a dye to a resin and the case of using a material having an extinction coefficient as described above differ from each other in the spectrum of absorbed light. When a dye is added to a resin to absorb light, the absorption wavelength band is fixed, and only a phenomenon in which the absorption amount varies with the thickness of the coating layer occurs. In order to obtain a desired light absorption amount, the light absorption amount needs to be adjusted by a thickness change of at least several micrometers. On the other hand, in a material having an extinction coefficient, even if the thickness varies on the order of several nanometers or several tens of nanometers, the wavelength band of the absorbed light varies.
In addition, when a dye is added to a conventional resin, only a specific color of the dye is expressed, and thus, various colors may not be displayed. On the other hand, the light absorbing layer of the present invention is advantageous in that various colors can be expressed by an interference phenomenon of light without adding a dye by using a specific material instead of a resin.
According to the embodiment, light is absorbed on an incident path and a reflection path of light in the light absorbing layer, and further, light is reflected on each of the surface of the light absorbing layer and the interface between the light absorbing
In this specification, light reflected from the surface of the light absorbing layer may be represented by surface reflection light, and light reflected from the interface between the light absorbing layer and the light reflecting layer may be represented by interface reflection light. Fig. 4 is a schematic diagram of this working principle. In fig. 4, a structure in which the
In the embodiments of the present specification, the light absorbing layer may be composed of a single layer or a plurality of layers of two or more layers.
In the embodiments of the present specification, the light absorbing layer may further include one or more selected from the group consisting of a metal, a metalloid, and an oxide, nitride, oxynitride and carbide of the metal or the metalloid. Oxides, nitrides, oxynitrides, or carbides of metals or metalloids may be formed by deposition conditions, etc., set by those skilled in the art. The light absorbing layer may contain the same metal, metalloid, alloy of two or more kinds, or oxynitride as the light reflecting layer.
In the embodiments of the present specification, the thickness T of the light absorbing layer1Can be determined according to the desired color of the final structure, and can be, for example, 31nm or more and 300nm or less, 31nm or more and 60nm or less, 91nm or more and 120nm or less, or 151nm or more and 180nm or less.
In the embodiments of the present specification, the material of the light reflection layer is not particularly limited as long as the material of the light reflection layer is a material capable of reflecting light, but the light reflectance may be determined according to the material, and for example, color is easily realized at a light reflectance of 50% or more. The light reflectance can be measured using an ellipsometer.
In embodiments of the present description, the light reflection layer may be a metal layer, a metal oxide layer, a metal nitride layer, a metal oxynitride layer, or an inorganic layer. The light reflecting layer may be formed of a single layer or a plurality of layers of two or more layers.
In the embodiments of the present specification, the light reflection layer is composed of a single layer or a plurality of layers including one or more types of materials selected from the group consisting of indium (In), titanium (Ti), tin (Sn), silicon (Si), germanium (Ge), aluminum (Al), copper (Cu), nickel (Ni), vanadium (V), tungsten (W), tantalum (Ta), molybdenum (Mo), neodymium (Nb), iron (Fe), chromium (Cr), cobalt (Co), gold (Au), and silver (Ag) and one or more types of materials selected from the group consisting of oxides, nitrides, or oxynitrides thereof, and carbon composites.
In the embodiments of the present specification, the light reflection layer may include two or more alloys selected from the above materials, oxides thereof, nitrides thereof, or oxynitrides thereof.
In the embodiments of the present specification, the light reflection layer is manufactured by using an ink containing carbon or a carbon composite to realize a high-resistance reflection layer. Carbon or carbon composites include carbon black, CNT, and the like.
In the embodiments of the present specification, the ink containing carbon or a carbon composite may contain the above-described materials, or oxides, nitrides, or oxynitrides thereof, and, for example, contain one or more types of oxides selected from the group consisting of indium (In), titanium (Ti), tin (Sn), silicon (Si), germanium (Ge), aluminum (Al), copper (Cu), nickel (Ni), vanadium (V), tungsten (W), tantalum (Ta), molybdenum (Mo), neodymium (Nd), iron (Fe), chromium (Cr), cobalt (Co), gold (Au), and silver (Ag). After printing the ink containing carbon or carbon composite, a curing process may be additionally performed.
In the embodiments of the present specification, when the light reflection layer includes two or more materials, the two or more materials may be formed through one process (e.g., a deposition or printing method), but a method of first forming a layer using one or more materials and then additionally forming a layer on the layer using one or more materials may be used. For example, a layer is formed by depositing indium or tin, then printing an ink containing carbon, and then curing, thereby forming a light reflective layer. The ink may additionally contain an oxide such as a titanium oxide or a silicon oxide.
In the embodiments of the present specification, the thickness of the light reflection layer may be determined according to a desired color of the final structure, and may be, for example, 1nm or more and 100nm or less, 10nm or more and 90nm or less, or 30nm or more and 90nm or less.
(light-absorbing layer Structure)
In the embodiments of the present specification, the light absorbing layer may take various shapes by adjusting deposition conditions and the like when forming the light absorbing layer.
In embodiments of the present description, the light absorbing layer includes two or more dots having different thicknesses.
In embodiments of the present description, the light absorbing layer includes two or more regions having different thicknesses.
In embodiments of the present description, the light absorbing layer may include an inclined surface.
Fig. 5 and 6 show examples of structures according to the embodiment. Fig. 5 and 6 show a structure in which the
In the embodiments of the present specification, the light absorbing layer includes at least one region having an inclined surface of which the top surface has an inclination angle greater than 0 degree and equal to or less than 90 degrees, and the light absorbing layer includes at least one region having a thickness different from that of the region having any one inclined surface. As for the inclined surface, an angle formed by any one straight line included in the top surface of the light absorbing layer and a straight line parallel to the light reflecting layer may be defined as the inclined surface. For example, the inclination angle of the top surface of the light absorbing layer of fig. 5 may be about 20 degrees.
The surface characteristics of the light reflecting layer such as the top surface slope may be the same as those of the light absorbing layer. For example, by using a deposition method in forming the light absorbing layer, the top surface of the light absorbing layer may have the same slope as the top surface of the light reflecting layer. However, the slope of the top surface of the light absorbing layer of fig. 5 is different from the slope of the top surface of the light reflecting layer.
Fig. 7 shows the structure of a decoration member having a light absorbing layer with an inclined surface on the upper surface. In the structure in which the
Fig. 7 relates to a light absorbing layer having a structure in which inclined surfaces face each other (i.e., a cross section has a triangular shape). As shown in fig. 7, in the structure having the pattern of the inclined surfaces facing each other, the thicknesses of the light absorbing layers on the two surfaces having the triangular structure may be different from each other even though the deposition is performed under the same condition. Therefore, the light absorbing layer having two or more regions different in thickness can be formed by only one process. Therefore, the expressed color varies according to the thickness of the light absorbing layer. In this case, when the thickness of the light reflection layer is a predetermined value or more, the thickness does not affect the color change.
In fig. 7, a structure in which the
Further, the surface of the
In embodiments of the present description, the light absorbing layer includes one or more regions of gradually varying thickness. In fig. 9, a structure in which the thickness of the
In an embodiment of the present specification, the light absorbing layer includes at least one region having an inclined surface of which the top surface has an inclination angle greater than 0 degree and equal to or less than 90 degrees, and the at least one region having the inclined surface has a structure in which the thickness of the light absorbing layer gradually changes. Fig. 9 shows a structure of a light absorbing layer including a region where the top surface has an inclined surface. Both the region G and the region H of fig. 9 have a structure in which the top surface of the light absorbing layer has an inclined surface and the thickness of the light absorbing layer gradually changes.
In this specification, the structure in which the thickness of the light absorbing layer varies means that a cross section in the thickness direction of the light absorbing layer includes a point at which the thickness of the light absorbing layer is the smallest and a point at which the thickness of the light absorbing layer is the largest, and the thickness of the light absorbing layer increases in the direction of the point at which the thickness of the light absorbing layer is the largest according to the point at which the thickness of the light absorbing layer. In this case, the point at which the light absorbing layer has the smallest thickness and the point at which the light absorbing layer has the largest thickness may refer to any points on the interface between the light absorbing layer and the light reflecting layer.
In the embodiments of the present specification, the light absorbing layer may include a first region having a first inclined surface with an inclination angle in a range of 1 to 90 degrees, and may further include two or more regions in which the top surface has an inclined surface with an inclination direction different from that of the first inclined surface or an inclination angle different from that of the first inclined surface or the top surface is horizontal. In this case, the thicknesses of the light absorbing layer in the first region and the two or more regions may all be different from each other.
(substrate)
In an embodiment of the present specification, the decoration member includes a substrate disposed on one surface of the color-expression layer.
In the embodiment of the present specification, the decoration member includes the
In embodiments of the present description, the substrate may comprise a plastic injection-molded part for a cosmetic housing or a glass substrate. More specifically, the plastic injection-molded part may include at least one of polypropylene (PP), Polystyrene (PS), polyvinyl acetate (PVAc), polyacrylate, polyethylene terephthalate (PET), polyvinyl chloride (PVC), polymethyl methacrylate (PMMA), ethylene-vinyl acetate copolymer (EVA), Polycarbonate (PC), polyamide, and styrene-acrylonitrile copolymer (SAN), but is not limited thereto.
Further, the plastic injection-molded article may be a planar type plastic injection-molded article without a curved line (a specific pattern), or may be a plastic injection-molded article with a curved line (a specific pattern).
The plastic injection-molded part can be produced by a plastic molding method. The plastic molding method includes compression molding, injection molding, blow molding, thermoforming, hot melt molding, foam molding, roll molding, reinforced plastic molding, and the like. Compression molding is a molding method in which a material is put into a mold and heated, and then pressure is applied, and compression molding, which is the oldest molding method, can be mainly used for molding of thermosetting resins such as phenol resin. Injection molding is a molding method in which a plastic melt is pushed into a conveyor and filled into a mold through a nozzle, and thermoplastic resins and thermosetting resins can be molded and may be the most commonly used molding methods. The resin currently used as cosmetic casing is SAN. Blow molding is a method of molding a product by inserting a plastic parison into the center of a mold and injecting air, and is very fast in terms of the manufacturing speed of the product as a molding method for manufacturing a plastic bottle or a small-sized housing.
In the examples of the present specification, glass having a transmittance of 80% or more can be used as the glass substrate.
In the embodiments of the present specification, the thickness of the substrate may be selected as needed, and for example, may have a range of 50 μm to 200 μm.
In the embodiments of the present specification, the decoration member may be manufactured by forming a light reflection layer on a substrate and disposing a light absorption layer on the light reflection layer. More specifically, in the decoration member, the light absorption layer and the light reflection layer may be sequentially formed on the substrate using a deposition process or the like, and the light reflection layer and the light absorption layer may be sequentially formed on the substrate using a deposition process or the like, but the present invention is not limited thereto.
(color film)
In embodiments of the present description, the color-expression layer further includes a color film.
In an embodiment of the present specification, the decoration member further includes a color film on a surface of the light absorption layer opposite to a surface facing the light reflection layer, between the light absorption layer and the light reflection layer, or on a surface of the light reflection layer opposite to a surface facing the light absorption layer. A colored film can be used as the substrate. For example, a dye or a pigment is added to a film serving as a substrate to serve as a color film.
In the examples of the present specification, the color film is not particularly limited if the color film is a film having a color difference Δ E ab, which is a distance in space of la a b on the color coordinates CIE L a b of the color expression layer, of greater than 1 when the color film is present, as compared with the case where the color film is not provided.
Colors may be represented by CIE L a b, and color differences may be defined using distances △ E ab in L a b space.And the observer may not recognize at 0<△E*ab<1 [ reference: mechanical Graphics and Vision (Machine Graphics and Vision)20(4) 383-]Therefore, in the present specification, the color difference depending on the addition of the color film may be defined as △ E ab>1。
Fig. 11 illustrates a color expression layer including a color film, fig. 11 (a) illustrates a structure in which a
In the embodiments of the present specification, when the substrate is disposed on the surface of the light reflection layer opposite to the surface facing the light absorption layer and the color film is located on the surface of the light reflection layer opposite to the surface facing the light absorption layer, the color film may be disposed between the substrate and the light reflection layer or on the surface of the substrate opposite to the surface facing the light reflection layer. As another example, when the substrate is disposed on a surface of the light absorbing layer opposite to a surface facing the light reflecting layer and the color film is located on a surface of the light absorbing layer opposite to a surface facing the light reflecting layer, the color film may be disposed between the substrate and the light absorbing layer or on a surface of the substrate opposite to a surface facing the light absorbing layer.
In the embodiments of the present specification, a substrate is disposed on a surface of a light reflection layer opposite to a surface facing a light absorption layer, and a color film is additionally disposed. Fig. 12 (a) shows a structure in which a color film 401 is provided on a surface of the
In the embodiments of the present specification, the substrate is disposed on a surface of the light absorbing layer opposite to a surface facing the light reflecting layer. Fig. 13 (a) shows a structure in which a color film 401 is provided on a surface of the
In the structures shown in fig. 12 (b) and 13 (c), when the visible light transmittance of the color film is greater than 0%, the light reflection layer may reflect light incident through the color film, thereby realizing color by laminating the light absorption layer and the light reflection layer.
In the structures shown in fig. 12 (c), 12 (d), and 13 (d), the light transmittance of the color expressed by the color film of the
In the embodiments of the present specification, the color film may be provided in a state in which one or two or more homogeneous or heterogeneous sheets are stacked.
As the color film, a color film capable of expressing a desired color in combination with a color expressed from the above-described laminated structure of the light reflection layer and the light absorption layer may be used. For example, a color film in which one or two or more kinds of pigments and dyes are dispersed in a matrix resin and color is expressed may be used. The color film as described above may be formed by directly applying the color film forming composition to a position where the color film can be disposed, or a method of applying the color film forming composition on a separate substrate, or arranging or attaching the color film at a position where the color film can be disposed after preparing the color film by using a known molding method such as casting, extrusion, or the like may be used. The coating method may employ wet coating or dry coating.
The pigments and dyes that can be included in the color film may be selected from those known in the art so as to obtain a desired color from the final decorative member, and one or two or more of red, yellow, violet, blue, pink series pigments and dyes may be used. Specifically, dyes including a perinone-based red dye, an anthraquinone-based red dye, a methine-based yellow dye, an anthraquinone-based violet dye, a phthalocyanine-based blue dye, a thioindigo-based pink dye, and an isoindigo-based pink dye may be used alone or in combination. Pigments including carbon black, copper phthalocyanine (c.i. pigment blue 15:3), c.i. pigment red 112, pigment blue and isoindoline yellow may be used alone or in combination. As the dye or pigment as described above, a commercially available dye or pigment may be used, and materials such as CibaORACET co., Ltd or Chokwang Paint Ltd may be used. The types of dyes or pigments and the colors of the dyes or pigments are only examples, and various known dyes or pigments may be used, thereby achieving a wider variety of colors.
As the matrix resin contained in the color film, materials known as materials such as a transparent film, a primer layer, an adhesive layer, and a coating layer can be used, and are not particularly limited thereto. For example, various materials including acrylic resin, polyethylene terephthalate resin, polyurethane resin, linear olefin resin, cycloolefin resin, epoxy resin, triacetyl cellulose resin, and the like may be selected, and copolymers or mixtures of the above exemplified materials may also be used.
For example, in the structure shown in fig. 12 (a) and 12 (b) and fig. 13 (a), 13 (b) and 13 (c), when the color film is provided at a position closer to the decorative member than the light reflecting layer or the light absorbing layer, the light transmittance of the color expressed from the light reflecting layer, the light absorbing layer or the laminated structure of the light reflecting layer and the light absorbing layer in the color film may be 1% or more, preferably 3% or more, and more preferably 5% or more. Therefore, the color expressed from the color film and the color expressed from the light reflection layer, the light absorption layer, or the laminated structure of the light reflection layer and the light absorption layer are combined together to realize a desired color.
The thickness of the color film is not particularly limited, and a person skilled in the art can select and set the thickness if a desired color can be expressed. For example, the thickness of the color film may be 500nm to 1 mm.
(Pattern layer)
In embodiments of the present description, the color-expression layer or the substrate may include a pattern layer.
In an embodiment of the present specification, the substrate includes a pattern layer, and the pattern layer is disposed adjacent to the color-expression layer.
In the present specification, the case where the pattern layer is disposed adjacent to the color-expression layer may mean that the pattern layer directly contacts the color-expression layer. For example, the pattern layer may be in direct contact with the light reflective layer of the color-rendering layer, or the pattern layer may be in direct contact with the light absorbing layer of the color-rendering layer.
In the embodiments of the present specification, the pattern layer includes a convex shape or a concave shape having a cross section of an asymmetric structure.
In an embodiment of the present specification, the pattern layer includes a convex shape having a cross section of an asymmetric structure.
In an embodiment of the present specification, the pattern layer includes a concave shape having a cross section of an asymmetric structure.
In an embodiment of the present specification, the pattern layer includes a convex shape having a cross section of an asymmetric structure and a concave shape having a cross section of an asymmetric structure.
In the present specification, "cross section" refers to a surface when a protrusion or a depression is cut in any one direction. For example, when the decoration element is placed on the ground, the cross section may refer to a surface when a projection or a depression is cut in a direction parallel to the ground or perpendicular to the ground. The surface of the pattern layer of the decoration member having the convex shape or the concave shape according to the embodiment is characterized in that at least one section perpendicular to the ground has an asymmetric structure.
In the present specification, the term "asymmetrical cross section" means that a pattern formed by the periphery of the cross section has no line symmetry or point symmetry. Line symmetry refers to the case that exhibits the following characteristics: when the predetermined pattern is symmetrical around a certain straight line, the patterns overlap. Point symmetry refers to the case where the following symmetry properties are exhibited: when the predetermined pattern is rotated by 180 degrees around one point, the predetermined pattern completely overlaps with the original pattern. Here, the circumference of the cross-section of the asymmetric structure may be a straight line, a curved line, or a combination thereof.
In the present specification, "convex shape" may include one or more "convex unit shapes" and "concave shape" may include one or more "concave unit shapes". The convex unit shape or the concave unit shape refers to a shape including two inclined sides (a first inclined side and a second inclined side), rather than a shape including three or more inclined sides. Referring to fig. 21, the convex shape P1 of the circle C1 has a convex unit shape including a first inclined side and a second inclined side. However, the convex shape included in the circle C2 includes two convex unit shapes. Each first inclined side may be defined as a left inclined side of the convex shape or the concave shape, and each second inclined side may refer to a right inclined side of the convex shape or the concave shape.
The decoration element may exhibit dichroism through protrusions or depressions having a cross section of an asymmetric structure included in a surface of the pattern layer, as described above, dichroism refers to observation of different colors according to a viewing angle, color may be represented by CIE L a b, and a distance △ E ab in space may be used to define a color differenceAnd the observer may not recognize 0<△E*ab<1 [ reference: mechanical Graphics and Vision (Machine Graphics and Vision)20(4) 383-]Thus, in this specification, dichroism may be defined as △ E ab>1。
In embodiments of the present description, the color representation layer has a dichroism of Δ Ε ab > 1. Specifically, the color difference Δ Ε ab (i.e. the distance in space of L a b on the color coordinates CIE L a b of the color representation layer) may be larger than 1.
In embodiments of the present description, the decorative member has a dichroism of Δ Ε ab > 1. In particular, the color difference Δ Ε ab (i.e. the distance in space of L a b on the color coordinates CIE L a b of the entire decorative element) may be greater than 1.
Fig. 14 exemplarily shows a decoration member (a substrate and a protective layer are not shown) including a pattern layer according to an embodiment of the present specification. The surface of the pattern layer may have a shape in which second protrusions P2 having a smaller height than the protrusions are disposed between the protrusions P1. Hereinafter, the protrusion described before the second protrusion may be referred to as a first protrusion.
Fig. 15 illustrates an example of a decorative member including a pattern layer according to an embodiment of the present description (a color expression layer is not illustrated). The surface of the pattern layer may have a shape in which the tip portion (tip portion) of the protrusion P1 further includes a depression P3 having a smaller height than the protrusion. The decoration member may exhibit an effect that the color of the image slightly varies according to the viewing angle.
In embodiments of the present specification, the pattern layer may include a convex shape or a concave shape, and each shape may be arranged in an inverted structure.
Fig. 16 illustrates an example of a trim member including a pattern layer according to an embodiment of the present description. As shown in (a) of fig. 16, the surface of the pattern layer may have a shape in which a plurality of protrusions are arranged in a structure inverted at 180 degrees. Specifically, the surface of the pattern layer may include a first region C1 in which the second inclined surface has a greater inclination angle than the first inclined surface, and a second region C2 in which the second inclined surface has a greater inclination angle than the first inclined surface in the second region C2. In one example, the protrusion included in the first region may be referred to as a first protrusion P1, and the protrusion included in the second region may be referred to as a fourth protrusion P4. The contents described in the item of the protrusion P1 may be similarly applied to the height, width, and inclination angle of the first protrusion P1 and the fourth protrusion P4, and the angle formed by the first inclined surface and the second inclined surface may be used. As shown in (b) of fig. 16, one of the first and second areas may correspond to an image or a logo, and the other area may correspond to a background portion. The decoration member may display an effect that the color of the image or logo slightly changes according to the viewing angle. Further, the decoration member may exhibit a decorative effect in which the colors of the image or logo portion appear to be exchanged according to the observation direction.
In embodiments of the present description, each of the first region and the second region may include a plurality of protrusions. The widths of the first and second regions and the numbers of protrusions of the first and second regions may be appropriately adjusted by considering the size of the target image or logo.
In the present specification, the inclination angles a2 and a3 of the protrusion P1 may refer to angles formed by the inclined surfaces S1 and S2 of the protrusion P1 and the horizontal plane of the pattern layer. Unless specifically mentioned in the present specification, the first inclined surface in the drawings may be defined as a convex left inclined surface, and the second inclined surface may refer to a convex right inclined surface.
In the embodiments of the present specification, the cross-section of the projection P1 of the pattern layer may have a polygonal shape and a cylindrical shape extending in one direction. In one example, the cross-section of the protrusion P1 may be triangular, or have a shape further including a small depression at the tip (tip or apex) of the triangle.
In the embodiments of the present description, the angle a1 formed between the first inclined surface S1 and the second inclined surface S2 may be in the range of 80 degrees to 100 degrees. Specifically, the angle a1 may be 80 degrees or more, 83 degrees or more, 86 degrees or more, or 89 degrees or more, and may be 100 degrees or less, 97 degrees or less, 94 degrees or less, or 91 degrees or less. The angle may refer to an angle of an apex formed between the first inclined surface and the second inclined surface. When the first inclined surface and the second inclined surface do not form an apex with each other, the angle may refer to an angle of the apex in a state where the apex is formed by virtually extending the first inclined surface and the second inclined surface.
In the embodiment of the present specification, the difference between the inclination angle a2 of the first inclined surface and the inclination angle a3 of the second inclined surface of the protrusion P1 may be in the range of 30 degrees to 70 degrees. For example, the difference between the inclination angle a2 of the first inclined surface and the inclination angle a3 of the second inclined surface may be 30 degrees or more, 35 degrees or more, 40 degrees or more, or 45 degrees or more, and may be 70 degrees or less, 65 degrees or less, 60 degrees or less, or 55 degrees or less. When the difference between the inclination angles of the first inclined surface and the second inclined surface is within the above range, it may be advantageous in achieving color representation according to the direction. That is, the dichroism can be expressed more.
In the embodiments of the present specification, the height H1 of the protrusions P1 may be 5 μm to 30 μm. If the height of the protrusions is within the above range, the aspect of the production process may be facilitated. In the present specification, the height of the protrusion may refer to the shortest distance between the highest portion and the lowest portion of the protrusion with respect to the horizontal plane of the pattern layer. In the description about the height of the protrusion, the same numerical range may be applied even to the depth of the depression described above.
In the embodiments of the present specification, the width W1 of the protrusion P1 may be 10 μm to 90 μm. If the width of the protrusion is within the above range, the process aspect of processing and patterning may be facilitated. For example, the width W1 of the projection P1 may be 10 μm or more, 15 μm or more, 20 μm or more, 25 μm or more, and may be 90 μm or less, 80 μm or less, 70 μm or less, 60 μm or less, 50 μm or less, 40 μm or less, or 35 μm or less. The description about the width may be applied not only to the protrusion but also to the depression described above.
In the embodiment of the present specification, the interval between the protrusions P1 may be 0 μm to 20 μm. In the present specification, the interval between the protrusions may refer to the shortest distance between the end point of one protrusion and the start point of the other protrusion of two adjacent protrusions. If the interval between the protrusions is properly maintained, the decoration member should have a relatively bright color when viewed from the inclined surface of the protrusion having a large inclination angle, and the phenomenon that the reflection region is darkened due to light shielding can be improved. As described below, there may be second protrusions having a smaller height than the protrusions between the protrusions. The description about the interval may be applied not only to the protrusion but also to the depression described above.
In the embodiments of the present description, the height H2 of the second protrusion P2 may have a range of 1/5 to 1/4 of the height H1 of the first protrusion P1. For example, the difference between the heights of the first and second protrusions (H1-H2) may be 10 μm to 30 μm. The width W2 of the second protrusion may be 1 μm to 10 μm. Specifically, the width W2 of the second protrusion may be 1 μm or more, 2 μm or more, 3 μm or more, 4 μm or more, or 4.5 μm or more, and may be 10 μm or less, 9 μm or less, 8 μm or less, 7 μm or less, 6 μm or less, or 5.5 μm or less.
In the embodiments of the present specification, the second protrusion may have two inclined surfaces S3 and S4 having different inclination angles. The angle a4 formed between the two inclined surfaces of the second protrusion may be 20 degrees to 100 degrees. Specifically, the angle a4 may be 20 degrees or more, 30 degrees or more, 40 degrees or more, 50 degrees or more, 60 degrees or more, 70 degrees or more, 80 degrees or more, or 85 degrees or more, and may be 100 degrees or less or 95 degrees or less. The difference (a6-a5) between the inclination angles of the two inclined surfaces of the second protrusion may be 0 to 60 degrees. The difference (a6-a5) in the inclination angles may be 0 degree or more, 10 degrees or more, 20 degrees or more, 30 degrees or more, 40 degrees or more, or 45 degrees or more, and may be 60 degrees or less or 55 degrees or less. When the size of the second protrusions is within the above range, it may be advantageous to increase incidence of light at a side having a larger inclination angle to form a bright color.
In the embodiments of the present specification, the height H3 of the depression P3 may be 3 μm to 15 μm. Specifically, the height H3 of the depression P3 may be 3 μm or more, and may be 15 μm or less, 10 μm or less, or 5 μm or less. The recess may have two inclined surfaces S5 and S6 having different inclination angles. The angle a7 formed between the two inclined surfaces of the recess may be 20 degrees to 100 degrees. Specifically, the angle a7 may be 20 degrees or more, 30 degrees or more, 40 degrees or more, 50 degrees or more, 60 degrees or more, 70 degrees or more, 80 degrees or more, or 85 degrees or more, and may be 100 degrees or less or 95 degrees or less. The difference between the inclination angles of the two inclined surfaces of the recess (a9-a8) may be 0 to 60 degrees. The difference (a9-a8) in the inclination angles may be 0 degree or more, 10 degrees or more, 20 degrees or more, 30 degrees or more, 40 degrees or more, or 45 degrees or more, and may be 60 degrees or less or 55 degrees or less. When the size of the depression is within the above range, it may be advantageous to increase color in the mirror surface.
In an embodiment of the present specification, the pattern layer includes a convex shape, and a cross section of the convex shape includes a first inclined side and a second inclined side, which are the same as or different from each other in shape and have a straight line or a curved line shape, respectively.
Fig. 17 illustrates an example of a trim member including a pattern layer according to an embodiment of the present description. The cross section of the pattern layer has a convex shape including a first region D1 including a first inclined side and a second region D2 including a second inclined side. The first and second inclined sides have a linear shape. The angle c3 between the first and second angled edges may be 75 to 105 degrees, or may be 80 to 100 degrees. The angle c1 between the first angled edge and the ground and the angle c2 between the second angled edge and the ground are different from each other. For example, the combination of c1 and c2 may be 20 degrees/80 degrees, 10 degrees/70 degrees, or 30 degrees/70 degrees.
Fig. 18 illustrates an example of a trim member including a pattern layer according to an embodiment of the present description. The cross section of the pattern layer has a convex shape including a first region E1 including a first inclined side and a second region E2 including a second inclined side in cross section. At least one of the first inclined side and the second inclined side may have a curved shape. For example, the first and second beveled edges may both have a curvilinear shape, the first beveled edge may have a linear shape and the second beveled edge may have a curvilinear shape. When the first inclined side has a linear shape and the second inclined side has a curved shape, the angle c1 may be greater than the angle c 2. Fig. 18 shows that the first beveled edge has a linear shape and the second beveled edge has a curved shape. The angle between the oblique side having the curved shape and the ground may be calculated from an angle formed by a straight line and the ground when an arbitrary straight line is drawn from a point where the oblique side meets the ground to a point where the first oblique side meets the second oblique side. The second inclined side having a curved shape may have different curvatures according to heights of the pattern layers, and the curve may have a radius of curvature. The radius of curvature may be 10 times or less greater than the width of the convex shape (E1+ E2). Fig. 18 (a) shows that the curvature radius of the curve is twice the width of the convex shape, and fig. 18 (b) shows that the curvature radius of the curve is twice the width of the convex shape. The ratio of the curvature portion E2 to the width of the projection (E1+ E2) may be 90% or less. Fig. 18 (a) and 18 (b) show that the ratio of the curvature portion E2 to the width of the projection (E1+ E2) is 60%.
In the embodiments of the present specification, the cross section of the convex shape may have a polygonal shape of a triangle or a quadrangle.
Fig. 19 illustrates an example of a trim member including a pattern layer according to an embodiment of the present description. The cross section of the pattern layer may have a convex shape, and the cross section of the convex shape may have a quadrangular shape. The quadrangular shape may be a general quadrangular shape, and is not particularly limited as long as the inclination angles of the inclined sides are different from each other. The quadrangular shape may be a shape left by partially cutting out a triangle. For example, the quadrangular shape may be a quadrangular trapezoid in which a pair of opposite sides are parallel to each other, or may be a quadrangular shape in which a pair of opposite sides that are parallel to each other are not present. The cross section of the convex shape includes a first region F1 including a first inclined edge, a second region F2 including a second inclined edge, and a third region F3 including a third inclined edge. The third oblique edge may be parallel to the ground or non-parallel to the ground. For example, when the quadrangular shape is a trapezoid, the third inclined side is parallel to the ground. At least one of the first to third inclined sides may have a curvilinear shape, and details of the curvilinear shape are as described above. The length of the sum of F1+ F2+ F3 may be defined as the width of the convex shape, and the details of the width are as described above.
In the embodiments of the present specification, the pattern layer may include two or more convex shapes, and may further include a flat portion in a part or all between the convex shapes.
Fig. 20 illustrates an example of a trim member including a pattern layer according to an embodiment of the present description. The pattern layer may include a flat portion between the protrusions. The flat portion refers to a region where no projection exists. The description of the other constituent portions (D1, D2, c1, c2, c3, first oblique edges, and second oblique edges) is as described above except that the pattern layer further includes a flat portion. On the other hand, the length of the sum of D1+ D2+ G1 is defined as the pitch of the pattern, which is different from the width of the pattern described above.
In embodiments of the present description, the convex-shaped or concave-shaped surface includes more than two convex shapes or concave shapes. Therefore, dichroism can be made larger by a surface having two or more convex shapes or concave shapes. In this case, the two or more convex shapes or concave shapes may be a repeated form of the same shape, but may include different shapes.
In the embodiments of the present specification, the convex shape or the concave shape having the cross section of the asymmetric structure includes at least two or more sides having a cross section with a different inclination angle, a different curvature, or a different shape. For example, when two sides among sides constituting at least one cross section have different inclination angles, different curvatures, or different shapes, the protrusion or the depression has an asymmetric structure.
In the embodiments of the present specification, the shape of the protrusion or the recess includes at least a first inclined side and a second inclined side of which the inclined angles of the cross section are different from each other.
In this specification, unless otherwise specified, "side" may be a straight line, but is not limited thereto, and all or a part of the side may be curved. For example, an edge may comprise a portion of an arc of a circle or ellipse, a wave-like structure, a structure such as a zig-zag, or the like.
In this specification, when an edge includes a part of an arc of a circle or an ellipse, the circle or the ellipse may have a radius of curvature. The radius of curvature may be defined as the radius of an arc when converting an extremely short section of a curve into the arc.
In the present specification, unless otherwise specified, the term "inclined edge" means an edge having an angle greater than 0 degree and equal to or less than 90 degrees between the edge and the ground when the decoration member is placed on the ground. At this time, when the side is a straight line, an angle between the straight line and the ground may be measured. When the edge includes a curved line, when the decoration element is placed on the ground, an angle formed between a straight line connecting a point of the edge closest to the ground and a point of the edge farthest from the ground at the shortest distance and the ground may be measured.
In this specification, unless otherwise specified, when the decoration member is placed on the ground, the inclination angle is greater than 0 degree and equal to or less than 90 degrees as an angle between the surface or edge constituting the pattern layer and the ground. Alternatively, the inclination angle may refer to an angle formed between the ground and a line segment (a '-b') generated when a point a 'contacting the surface or edge of the pattern layer with the ground and a point b' farthest from the ground of the surface or edge of the pattern layer are connected to each other.
In this specification, unless otherwise specified, tortuosity refers to the degree of change in the slope of a tangent at a continuous point on an edge or surface. The greater the change in slope of the tangent at successive points on the edge or surface, the greater the degree of curvature.
In the present specification, the protrusion may have a protrusion unit shape, and the depression may have a depression unit shape. The convex unit shape or the concave unit shape refers to a shape including two inclined sides (a first inclined side and a second inclined side), rather than a shape including three or more inclined sides. Referring to fig. 21, the protrusion P1 of the circle C1 has a protrusion unit shape including a first inclined edge and a second inclined edge. However, the shape contained in the circle C2 includes two convex unit shapes. The first inclined edge may be defined as a left inclined edge of the protrusion or depression, and the second inclined edge may refer to a right inclined edge of the protrusion or depression.
In the embodiments of the present description, the angle a1 formed between the first and second oblique edges may be in the range of 80 degrees to 100 degrees. Specifically, the angle a1 may be 80 degrees or more, 83 degrees or more, 86 degrees or more, or 89 degrees or more, and may be 100 degrees or less, 97 degrees or less, 94 degrees or less, or 91 degrees or less. The angle may refer to an angle of a vertex formed between the first oblique side and the second oblique side. When the first oblique side and the second oblique side do not form a vertex with each other, the angle may refer to an angle of the vertex in a state where the vertex is formed by virtually extending the first oblique side and the second oblique side.
In the embodiment of the present specification, the difference between the inclination angle a2 of the first inclined side and the inclination angle a3 of the second inclined side of the protrusion P1 may be in the range of 30 degrees to 70 degrees. For example, the difference between the inclination angle a2 of the first inclined side and the inclination angle a3 of the second inclined side may be 30 degrees or more, 35 degrees or more, 40 degrees or more, or 45 degrees or more, and may be 70 degrees or less, 65 degrees or less, 60 degrees or less, or 55 degrees or less. When the difference between the inclination angles of the first inclined side and the second inclined side is within the above range, it may be advantageous to realize color representation according to the direction.
Fig. 22 exemplarily shows a pattern layer of a decoration member and a manufacturing method thereof according to an embodiment of the present specification. The cross-section of the pattern layer may have a convex shape, and the cross-section of the convex shape may have a shape in which a specific region of the ABO1 triangular shape is removed. The method of determining the specific area to be removed is as follows. The contents of the inclination angles c1 and c2 are the same as described above.
1) An arbitrary point P1 dividing the AO1 segment at a ratio of L1: L2 is set on the AO1 segment.
2) An arbitrary point P2 that divides a BO1 segment at a ratio of m1: m2 is set on the BO1 segment.
3) An arbitrary point O2 dividing the AB segment by the ratio of n1: n2 is set on the AB segment.
4) An arbitrary point P3 dividing the O2O1 segment at a ratio of O1: O2 is set on the O1O2 segment.
In this case, the ratios of L1: L2, m1: m2, n1: n2, and o1: o2 may be the same as or different from each other, and are each independently 1:1000 to 1000: 1.
5) The region formed by the polygon P1O1P2P3 is removed.
6) The shape formed by the polygon ABP2P3P1 is set to a convex cross section.
The pattern layer may be modified in various forms by adjusting the ratios of L1: L2, m1: m2, n1: n2, and o1: o 2. For example, when L1 and m1 are increased, the height of the pattern may be increased, and when o1 is increased, the height of the depression formed on the projection may be decreased, and by adjusting the ratio of n1, the position of the lowest point of the depression formed in the projection may be adjusted to be close to either inclined side of the projection.
Fig. 23 exemplarily shows a pattern layer manufactured by a method of manufacturing the pattern layer of the decoration member of fig. 22. When the ratios of L1: L2, m1: m2 and o1: o2 are all the same as one another, the cross section may have a trapezoidal shape. The heights ha and hb of the trapezoids can be varied by adjusting the ratio of L1: L2. For example, (a) of fig. 23 shows a pattern layer manufactured when the ratio of L1: L2 is 1:1, and (b) of fig. 23 shows a pattern layer manufactured when the ratio of L1: L2 is 2: 1.
In the embodiments of the present specification, the convex shape or the concave shape of the surface of the pattern layer may be a tapered convex protruding outward from the surface of the pattern layer or a tapered concave recessed into the surface of the pattern layer.
In embodiments of the present description, the taper comprises the shape of a cone, an elliptical cone, or a polygonal pyramid (polypyramid). Here, the base shape of the polygonal pyramid includes a triangle, a square, a star shape having 5 or more protruding points. According to an example, when the surface of the pattern layer has a tapered convex shape when the decoration member is placed on the ground, at least one vertical section of the convex shape with respect to the ground may have a triangular shape. According to another example, when the surface of the pattern layer has a tapered concave shape when the decoration member is placed on the ground, at least one vertical section of the concave shape with respect to the ground may have an inverted triangular shape.
In embodiments of the present description, the tapered convex shape or the tapered concave shape may have at least one asymmetrically-structured cross-section. For example, when the conical convex shape or the conical concave shape is viewed from the surface side of the convex shape or the concave shape, when there are two or less identical shapes when rotated 360 degrees from the apex of the cone, it is advantageous to exhibit dichroism. Fig. 24 shows a convex shape of a taper viewed from a surface side of the convex shape, in which a) shows a taper having a symmetrical structure, and b) shows a taper having an asymmetrical structure.
When the decoration member is placed on the ground, the taper of the symmetrical structure has a structure in which a cross section in a direction parallel to the ground (hereinafter, referred to as a horizontal cross section) is a circle or a regular polygon having the same length of each side, and the apex of the taper is present on a line perpendicular to a cross section of the center of gravity of the horizontal cross section with respect to the ground. However, the taper having the cross section of the asymmetric structure is a structure when viewed from the surface side of the convex or concave shape of the taper: the position of the apex of the cone exists on a vertical line at a point other than the center of gravity of the horizontal section of the cone, or a configuration in which: the horizontal section of the cone is a polygon or an ellipse with an asymmetric structure. When the horizontal cross section of the cone is a polygon of an asymmetric structure, at least one side or corner of the polygon may be designed to be different from the other sides or corners.
For example, as shown in FIG. 25, the location of the apex of the cone may be changed. Specifically, as shown in the first drawing of fig. 25, when viewed from the surface side of the convex shape of the cone, when the apex of the cone is designed to be located on the vertical line of the gravity center 01 of the horizontal section of the cone with respect to the ground, four identical structures (4-fold symmetry) can be obtained when rotated 360 degrees based on the apex of the cone. However, by designing the apex of the cone at position 02 instead of the centre of gravity 01 of the horizontal section with respect to the ground, the symmetrical structure is broken. When the length of one side of the horizontal section with respect to the ground is x, the moving distance (moving distance) of the apex of the cone is a and b, the height of the cone (i.e., the length of a line perpendicularly connected from the apex 01 or 02 of the cone to the horizontal section with respect to the ground) is h, and the angle formed between the horizontal section and the side surface of the cone is θ n, the cosine values with respect to the
At this time, since
Fig. 26 shows a surface having a linear convex shape at the highest point, in which (a) shows a pattern having a protrusion exhibiting no dichroism, and (b) shows a pattern having a protrusion exhibiting dichroism. The section X-X 'of fig. 26 (a) is an isosceles triangle or an equilateral triangle, and the section Y-Y' of fig. 26 (b) is a triangle having different side lengths.
In the embodiments of the present specification, the pattern layer has a surface whose highest point is a linear convex shape or whose lowest point is a linear concave shape. The linear shape may be a straight line shape and a curved line shape, may include both a curved line and a straight line, or may be a zigzag shape. This is shown in fig. 27 to 29. When a surface having a linear convex shape as the highest point or a linear concave shape as the lowest point is viewed from the surface side of the convex shape or the concave shape, when there is only one same shape when rotated by 360 degrees based on the center of gravity of a horizontal section of the convex or concave with respect to the ground, it is advantageous to express dichroism.
In the embodiments of the present specification, the pattern layer has a convex-shaped or concave-shaped surface of a structure in which a tip of a taper is cut off. Fig. 30 shows a photograph of an inverted trapezoidal depression having an asymmetrical cross section perpendicular to the ground surface achieved when the decoration element is placed on the ground surface. Such an asymmetric cross-section may be trapezoidal or inverted trapezoidal in shape. Even in this case, dichroism can be expressed by the cross section of the asymmetric structure.
In addition to the above-described structure, various convex-shaped or concave-shaped surfaces as shown in fig. 31 can be realized.
In the present specification, unless otherwise specified, "a surface" may be a flat surface, but is not limited thereto, and all or a part of the surface may be a curved surface. For example, the surface may include a portion of an arc, a wave structure, a zigzag structure, or the like, whose shape of a cross section in a direction perpendicular to the surface is a circle or an ellipse.
In embodiments of the present description, the pattern layer comprises a pattern of symmetrical structures. The symmetric structure includes a prism structure, a lenticular lens structure, and the like.
In an embodiment of the present specification, the decoration member includes a pattern layer including a convex shape or a concave shape having a cross-section of an asymmetric structure on a surface of the light absorption layer facing the light reflection layer, between the light absorption layer and the light reflection layer, or on a surface of the light reflection layer facing the light absorption layer.
In the embodiments of the present specification, the pattern layer may have a flat portion on a surface opposite to a surface on which the convex shape or the concave shape is formed, and the flat portion may be formed on the substrate. A plastic substrate may be used as the substrate layer. Examples of the plastic substrate may include triacetyl cellulose (TAC); cyclic olefin Copolymers (COP) such as norbornene derivatives; poly (methyl methacrylate) (PMMA); polycarbonate (PC); polyethylene (PE); polypropylene (PP); polyvinyl alcohol (PVA); diacetylcellulose (DAC); polyacrylates (Pac); polyethersulfone (PES); polyetheretherketone (PEEK); polyphenylsulfone (PPS); polyetherimide (PEI); polyethylene naphthalate (PEN); polyethylene terephthalate (PET); polyimide (PI); polysulfone (PSF); polyarylate (PAR); or amorphous fluororesin, etc., but is not limited thereto.
In the embodiments of the present specification, the pattern layer may include a thermosetting resin or an ultraviolet curable resin. A photo-curable resin or a thermosetting resin may be used as the curing resin. An ultraviolet curable resin may be used as the photocurable resin. As the thermosetting resin, for example, silicone resin, furan resin, urethane resin, epoxy resin, amino resin, phenol resin, urea resin, polyester resin, melamine resin, or the like can be used, but not limited thereto. The ultraviolet curable resin may generally include an acrylic polymer such as a polyester acrylate polymer, a polystyrene acrylate polymer, an epoxy acrylate polymer, a urethane acrylate polymer, a polybutadiene acrylate polymer, a silicone acrylate polymer, an alkyl acrylate polymer, or the like, but is not limited thereto.
In the embodiments of the present specification, a color dye may be further included in the inside or on at least one surface of the pattern layer. For example, the inclusion of a color dye on at least one surface of the pattern layer may refer to a case where a color dye is included in the above-described substrate layer provided on the flat portion side of the pattern layer.
In the embodiments of the present specification, the chromatic dye may include an anthraquinone-based dye, a phthalocyanine-based dye, a thioindigo-based dye, a pyreneketone-based dye, an isoindigo-based dye, a methine-based dye, a monoazo-based dye, and a 1:2 metal complex-based dye.
In the embodiments of the present specification, when the pattern layer contains a color dye therein, a scheme of adding a dye to the cured resin may be applied. When the color dye is further contained in the lower portion of the pattern layer, a scheme of coating a layer containing the color dye on the upper or lower portion of the substrate layer may be applied.
In the embodiments of the present specification, for example, the content of the color dye may be 0 wt% to 50 wt%. The content of the color dye may determine the transmittance and haze ranges of the pattern layer and the decoration member, and for example, the transmittance may be 20% to 90%, and for example, the haze may be 1% to 40%.
In the embodiments of the present specification, the color expression layer may provide a metallic texture and a color depth effect when the decoration member is observed. The color representation layer may display various colors according to a viewing angle of an image of the decoration member. This is because the wavelength of light passing through the pattern layer and reflected from the surface of the inorganic layer varies according to the wavelength of incident light.
The color-expression layer may have the same protrusions or depressions as the surface of the pattern layer described above. The color-expression layer may have the same slope as the surface of the pattern layer described above.
In an embodiment of the present specification, the decoration member includes a protection layer provided between the substrate and the color-expression layer; a surface of the color-expressing layer facing the substrate; or on the surface of the substrate facing the color-rendering layer.
In an embodiment of the present specification, the decoration member includes a protection layer provided at least one of between the substrate and the pattern layer, between the pattern layer and the light reflection layer, between the light reflection layer and the light absorption layer, and on a surface of the light absorption layer opposite to a surface facing the light reflection layer. That is, the protective layer plays a role of protecting the decoration member by being disposed between layers of the decoration member or being disposed at the outermost side of the decoration member.
In the present specification, unless otherwise defined, "protective layer" means a layer capable of protecting other layers of the decorative member. For example, the inorganic layer can be prevented from deteriorating in a moisture-resistant or heat-resistant environment. Alternatively, scratching of the inorganic layer or the pattern layer due to external factors may be effectively suppressed, so that dichroism of the decorative member may be effectively expressed.
In the present specification, the term "inorganic layer" refers to a light absorbing layer or a light reflecting layer unless otherwise defined.
In the present specification, examples of the structure of the decorative member including the protective layer are as follows.
For example, the decoration member may have a structure of substrate/protective layer/pattern layer/light reflective layer/light absorbing layer/protective layer or substrate/protective layer/pattern layer/light absorbing layer/light reflective layer/protective layer.
In an embodiment of the present description, the protective layer includes aluminum oxynitride. Since the protective layer contains aluminum oxynitride (AlON), the function of the protective layer described below can be enhanced as compared with the case where the protective layer does not contain aluminum oxynitride (AlON). Further, when the ratio of each element of aluminum oxynitride is adjusted, the protective function can be further improved.
In the embodiments of the present specification, the decoration member further includes a protective layer so that damage to the pattern layer and the inorganic layer is suppressed even when placed in a high-temperature and high-humidity environment, and thus an excellent decoration effect is maintained even under a severe environment.
The decorative member of the present specification can be applied to a known object requiring an application. For example, the present invention may be applied to portable electronic devices, electronic products, cosmetic containers, furniture, building materials, and the like, without limitation.
A method of applying the decoration member to a portable electronic device, an electronic product, a cosmetic container, furniture, a building material, or the like is not particularly limited, and a method known in the art as a method of applying a decoration film may be used. The decoration member may further include an adhesive layer as necessary. In another example, the trim member may be applied to the portable electronic device or the electronic product by direct coating. In this case, a separate adhesive layer for attaching the decoration member to the portable electronic device or the electronic product may not be required. In another example, the trim member may be attached to the portable electronic device or the electronic product by an adhesive layer. The adhesive layer may use an optical clear adhesive tape (OCA tape) or an adhesive resin. The OCA tape or the adhesive resin may use those known in the art without limitation. A release film for protecting the adhesive layer may be further provided as needed.
In the embodiments of the present specification, the light reflecting layer and the light absorbing layer may be formed on the substrate or the pattern of the pattern layer of the substrate by a sputtering method, an evaporation method, a vapor deposition method, a Chemical Vapor Deposition (CVD), a wet coating, or the like, respectively. In particular, since the sputtering method has linearity, the difference in deposition thickness of the two inclined surfaces of the projection can be maximized by inclining the position of the target.
In the embodiments of the present specification, the light reflection layer and the light absorption layer may be formed separately by a reactive sputtering method. Reactive sputtering is such a method: energetic ion (e.g. Ar)+) The target material is impacted and the now dislodged target material is deposited on the surface to be deposited in this case, the base pressure can be 1.0 × 10-5Below, 6.0 × 10-6Below, preferably 3.0 × 10-6And (5) supporting below.
In embodiments of the present description, the reactive sputtering process may be performed in a chamber containing a plasma gas and a reactive gas. The plasma gas may be argon (Ar) gas. In addition, the reaction gas required for forming the inorganic layer is oxygen (O) as a gas that supplies oxygen atoms or nitrogen atoms2) And nitrogen (N)2) And is different from the plasma gas.
In the embodiments of the present disclosure, the flow rate of the plasma gas may be 10sccm or more and 300sccm or less, and preferably 20sccm or more and 200sccm or less. sccm refers to standard cubic centimeters per minute.
In embodiments of the present description, the process pressure p1 in the chamber may be 1.0 mtorr to 10.0 mtorr, preferably 1.5 mtorr to 10.0 mtorr. If the process pressure is higher than the above range during sputtering, the presence of Ar particles in the chamber increases, and particles detached from the target collide with the Ar particles to lose energy, thereby decreasing the growth rate of the thin film. On the other hand, if the process pressure is maintained too low, the energy loss of the copper nickel oxide particles by the Ar particles is reduced, but there is a disadvantage that the high energy particles may damage the substrate or deteriorate the quality of the protective layer.
In the embodiments of the present specification, the fraction (fraction) of the reaction gas with respect to the plasma gas may be 30% or more and 70% or less, preferably 40% or more and 70% or less, and more preferably 50% or more and 70% or less. The fraction of the reactant gas can be calculated as (Q)Reaction gas/(QPlasma process gas)×100％)。QReaction gasRefers to the flow rate of the reaction gas in the chamber, QPlasma process gasMay be the flow of the plasma process gas in the chamber. When this numerical range is satisfied, the atomic ratio of the copper nickel oxide described above may be adjusted to a desired range.
In the embodiments of the present specification, the driving power of the reactive sputtering method may be 100W or more and 500W or less, and preferably 150W or more and 300W or less.
In the embodiments of the present specification, the voltage applied in the reactive sputtering method may be in a range of 350V or more and 500V. The voltage range may be adjusted according to the state of the target, the process pressure, the driving power (process power), or the fraction of the reaction gas.
In the embodiments of the present specification, the deposition temperature of the reactive sputtering method may be 20 ℃ or more and 300 ℃ or less. When depositing at a temperature lower than the above range, there is a problem that the crystallinity of the thin film growth is deteriorated due to insufficient energy required for crystal growth of particles which are detached from the target and reach the substrate. At a temperature higher than the above range, there is a problem that particles detached from the target are evaporated or re-evaporated, thereby deteriorating the film growth rate.
[ modes for carrying out the invention ]
Hereinafter, the present application will be described in detail with reference to examples, but the scope of the present specification is not limited by the following examples.
< examples and comparative examples >
Comparative example 1
An ultraviolet curable resin was coated on a PET substrate to form a prismatic pattern layer having an inclination angle of 20 degrees/70 degrees. Thereafter, a color expression layer including a light absorbing layer and a light reflecting layer is formed on the pattern layer using reactive sputtering.
Specifically, reactive sputtering was used, and a copper target and a nickel target (target weight ratio wt% Cu: Ni 98:2) were used. The argon flow was 35sccm, the oxygen flow was adjusted to 15sccm, the process pressure was 9 mTorr, and the power was maintained at 200W. Thus, a light-absorbing layer having the composition of table 2 of 10nm was formed. Then, In was deposited on the light absorbing layer by sputtering to a thickness of 70nm to form a light reflecting layer, thereby producing a final decorative member.
Comparative example 2
A decorative member was manufactured in the same manner as in comparative example 1, except that the thickness of the light absorbing layer was adjusted to 20 nm.
Comparative example 3
A decorative member was manufactured in the same manner as in comparative example 1, except that the thickness of the light absorbing layer was adjusted to 30 nm.
Example 1
A decorative member was manufactured in the same manner as in comparative example 1, except that the thickness of the light absorbing layer was adjusted to 40 nm.
Example 2
A decorative member was manufactured in the same manner as in comparative example 1, except that the thickness of the light absorbing layer was adjusted to 50 nm.
Example 3
A decorative member was manufactured in the same manner as in comparative example 1, except that the thickness of the light absorbing layer was adjusted to 60 nm.
Comparative example 4
A decorative member was produced in the same manner as in comparative example 1, except that the target weight ratio wt% of copper and nickel was changed to Cu: Ni of 69: 31.
Comparative example 5
A decorative member was produced in the same manner as in comparative example 4, except that the thickness of the light absorbing layer was adjusted to 20 nm.
Comparative example 6
A decorative member was produced in the same manner as in comparative example 4, except that the thickness of the light absorbing layer was adjusted to 30 nm.
Example 4
A decorative member was produced in the same manner as in comparative example 4, except that the thickness of the light absorbing layer was adjusted to 40 nm.
Example 5
A decorative member was manufactured in the same manner as in comparative example 4, except that the thickness of the light absorbing layer was adjusted to 50 nm.
Example 6
A decorative member was produced in the same manner as in comparative example 4, except that the thickness of the light absorbing layer was adjusted to 60 nm.
Comparative example 7
A decorative member was produced in the same manner as in comparative example 1, except that the target weight ratio wt% of copper and nickel was changed to Cu: Ni of 29: 71.
Comparative example 8
A decorative member was produced in the same manner as in comparative example 7, except that the thickness of the light absorbing layer was adjusted to 20 nm.
Comparative example 9
A decorative member was produced in the same manner as in comparative example 7, except that the thickness of the light absorbing layer was adjusted to 30 nm.
Example 7
A decorative member was produced in the same manner as in comparative example 7, except that the thickness of the light absorbing layer was adjusted to 40 nm.
Example 8
A decorative member was produced in the same manner as in comparative example 7, except that the thickness of the light absorbing layer was adjusted to 50 nm.
Example 9
A decorative member was produced in the same manner as in comparative example 7, except that the thickness of the light absorbing layer was adjusted to 60 nm.
[ Table 2]
< evaluation example (color evaluation) >
The composition ratios of the decorative members manufactured in examples and comparative examples were analyzed, colors exhibited by the respective thicknesses were observed, and they were recorded in table 3 below.
[ Table 3]
In the case of the decorative members of comparative examples 1 to 9, a warm tone was displayed, and in the case of the decorative members of examples 1 to 9, a cool tone was displayed. This is shown in fig. 34.
When the examples and the comparative examples were compared, it was confirmed that even if the components of the light absorbing layer were the same as each other, a warm tone or a cool tone was displayed when the thickness was changed.
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