Decorative member and method for manufacturing decorative member

Abstract

The present disclosed relates to a decoration element and a method for preparing the decoration element. decoration element has dichroism expressing different colors depending on a viewing direction, and has improved visibility of the dichroism.

Claims

1. A decoration member comprising: a pattern layer comprising a surface having a convex portion or concave portion shape having an asymmetric-structured cross-section; and an inorganic material layer provided on the surface having the convex portion or concave portion shape, wherein the convex portion or concave portion shape comprises a first inclined surface and a second inclined surface having different inclined angles, wherein a difference in the inclined angles of the first inclined surface and the second inclined surface is in a range of 30 degrees to 70 degrees, and wherein the inorganic material layer provided on the first inclined surface has a different thickness than the inorganic material layer provided on the second inclined surface.

2. The decoration member of claim 1, wherein, in the convex portion or concave portion shape having an asymmetric-structured cross-section, at least one cross-section comprises two or more sides having different inclined angles, different curvatures, or different side shapes.

3. The decoration member of claim 1, wherein, in the convex portion or concave portion shape, at least one cross-section comprises a first inclined side and a second inclined side having different inclined angles.

4. The decoration member of claim 1, wherein the surface having the convex portion or concave portion shape comprises two or more of the convex portion or concave portion shapes.

5. The decoration member of claim 1, wherein borders of the asymmetric-structured cross-section are a straight line, a curved line or a combination thereof.

6. The decoration member of claim 1, wherein an angle formed by the first inclined surface and the second inclined surface is in a range of 80 degrees to 100 degrees.

7. The decoration element of claim 1, wherein the pattern layer has a flat portion on an opposite side surface of the surface forming the convex portion or concave portion.

8. The decoration element of claim 7, wherein the flat portion of the pattern layer is formed on a substrate layer.

9. The decoration element of claim 4, wherein a width of the convex portion or concave portion shape is from 10 μm to 90 μm, and a distance between the convex portions or concave portions is from 0 μm to 20 μm.

10. The decoration element of claim 1, wherein the pattern layer comprises a thermocurable resin or an ultraviolet curable resin.

11. The decoration element of claim 1, further comprising a color dye inside or on at least one surface of the pattern layer.

12. The decoration element of claim 1, wherein the inorganic material layer is a single layer or a multilayer comprising one, two or more types of materials selected from among 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), or oxides, nitrides or oxynitrides thereof, and optionally one or more types of materials among carbon and carbon composites.

13. The decoration element of claim 1, wherein the surface of the pattern layer has a plurality of the convex portions, and a second convex portion having a smaller height compared to the convex portion between the adjacent convex portions.

14. The decoration element of claim 13, wherein the height of the second convex portion is in a range of ⅕ to ¼ of the height of the convex portion.

15. The decoration element of claim 1, wherein the surface of the pattern layer has a shape in which a tip portion of the convex portion further comprises a concave portion having a smaller height compared to the convex portion.

16. The decoration element of claim 15, wherein the concave portion has a shape comprising two inclined surfaces having different inclined angles.

17. The decoration element of claim 1, wherein the inorganic material layer comprises a light absorbing layer and a light reflective layer consecutively provided on the pattern layer, or comprising a light reflective layer or a light absorbing layer consecutively provided on the pattern layer.

18. The decoration member of claim 1, further comprising a color film provided: between the pattern layer and the inorganic material layer; on a surface of the pattern layer opposite to the surface facing the inorganic material layer; or on a surface of the inorganic material layer opposite to the surface facing the pattern layer.

Description

DESCRIPTION OF DRAWINGS

(1) FIG. 1 illustrates a decoration element of the present specification.

(2) FIG. 2 illustrates a decoration element of the present specification.

(3) FIG. 3 illustrates a decoration element of the present specification, and left and right views.

(4) FIG. 4 illustrates a method for preparing a decoration element of the present specification.

(5) FIG. 5 shows a visual evaluation result of dichroism of Example 1.

(6) FIG. 6 illustrates a lamination structure of a decoration element according to one embodiment of the present specification.

(7) FIGS. 7 to 9 illustrate an upper surface structure of a light absorbing layer of a decoration element.

(8) FIGS. 10 to 14 are examples of a surface having a convex portion or concave portion shape of a pattern layer according to several embodiments.

(9) FIG. 15 is a mimetic diagram illustrating an optical path depending on the lamination structure of a light absorbing layer and a light reflective layer.

(10) FIGS. 16 and 17 show results of observing structures and colors of decoration members of Examples 5 to 7.

(11) FIG. 18 presents n and k values of an aluminum oxynitride layer of Example 5.

(12) FIGS. 19 and 20 are structures of pattern layers each used in Examples 8, 9 and Comparative Example 2.

(13) FIG. 21 shows structures and colors of decoration members prepared in Examples 8 and 9 and Comparative Example 2.

(14) FIGS. 22 and 23 illustrate a lamination structure of a decoration member comprising a color film.

(15) FIG. 24 illustrates a structure of a pattern layer used in Example 10 to Example 28.

(16) FIGS. 25 and 26 show properties of color films used in Example 10 to Example 28.

(17) FIGS. 27 to 29 show colors of decoration members prepared in Example 10 to Example 28.

(18) FIGS. 30 and 31 show experimental results according to Evaluation Example 2.

(19) FIGS. 32 to 40 illustrate decoration members according to embodiments of the present specification.

(20) FIG. 41 is a diagram presenting a method of distinguishing a light absorbing layer and a light reflective layer.

(21) FIGS. 42 to 54 show experimental results according to Evaluation Example 3.

(22) FIGS. 55 and 56 are diagrams introduced for describing a color coordinate system.

(23) Three numbers shown in the colors of FIGS. 17, 21, 27 and 28 are L*ab coordinate values of the colors.

MODE FOR DISCLOSURE

(24) Hereinafter, the present application will be specifically described with reference to examples, however, the scope of the present specification is not limited by the following examples.

Example 1

(25) A hard mold was processed so as to have a pattern of a structure of FIG. 1. A pattern layer having a structure of FIG. 1 was formed by coating a composition comprising an epoxy resin and a phthalocyanine-based dye on a substrate layer, compressing the hard mold and then curing with ultraviolet rays. A decoration element was prepared by depositing aluminum to a thickness of 200 nm on the top of the pattern layer using a sputter method to form an inorganic material layer. A refractive index of the inorganic material layer for light having a wavelength of 400 nm was 5. In the prepared decoration element, both inclined angles of a first convex portion were each 20 degrees (a2) and 70 degrees (a3) and the width was 30 μm, and both inclined angles of a second convex portion were each 20 degrees (a5) and 70 degrees (a6) and the width was 5 μm. Heights (H1, H2) of the first and the second convex portions were each determined from the width and the inclined angle.

Example 2

(26) A decoration element was prepared in the same manner as in Example 1 except that soft and hard molds were processed so as to have a pattern of a structure and of FIG. 2. In the prepared decoration element, both inclined angles of a convex portion were each 20 degrees and 70 degrees and the width was 30 μm, and both inclined angles of a concave portion were each 20 degrees (a8) and 70 degrees (a9) and the height (H3) was 3 μm. A height of the convex portion was determined from the width and the inclined angle, and a width of the concave portion was determined from the height and the inclined angle.

Example 3

(27) A decoration element was prepared in the same manner as in Example 1 except that soft and hard molds were processed so as to have a pattern of a structure and of FIG. 3. In the prepared decoration element, both inclined angles of a first convex portion (P1) of a convex portion of a first area were each 20 degrees and 70 degrees and the width was 30 μm, and a convex portion (P4) of a second area had an inversed structure of 180 degrees with the convex portion of the first area, and both inclined angles were each 70 degrees and 20 degrees.

Example 4

(28) A decoration element was prepared in the manner of FIG. 4 using a sputter method. A pattern layer was prepared in the same manner as in Example 1, and a first inorganic material layer (201) was formed by depositing molybdenum to a thickness of 100 nm by tilting toward a first inclined surface of the pattern layer, and then a second inorganic material layer (202) was formed by depositing aluminum to a thickness of 300 nm by tilting toward a second inclined surface.

Examples 5 to 7

(29) After forming a pattern layer (FIG. 16) by coating an ultraviolet curable resin on a PET substrate layer, an AlO.sub.xN.sub.y (0≤x, 0.1≤y≤1) light absorbing layer was formed on the pattern of the substrate using a reactive sputtering method by adding nitrogen. On the light absorbing layer, Al having a thickness of 100 nm was deposited using a sputtering method to form a light reflective layer (Al, thickness 120 nm).

(30) The pattern layer shape was formed in a structure repeating an asymmetric prism structure as in FIG. 16, and a sample was prepared by employing an inclined angle on one side surface of the pattern as 60°, and an inclined angle on the other side as 40° (Example 5), 30° (Example 6) and 20° (Example 7). Herein, a pitch of the patterns was 100 micrometers, and a height of the pattern was 25 micrometers. Light entered to the substrate side of the obtained sample, passed through the light absorbing layer, and light reflected on the light reflective layer may be observed from the substrate side. The thickness and the color of the light absorbing layer observed from the obtained sample are presented in FIG. 17. n and k values of the aluminum oxynitride layer are described in FIG. 18.

Comparative Example 1

(31) A decoration element was prepared in the same manner as in Example 5, except that the pattern layer shape was formed in a structure repeating symmetric prism structure, and an inclined angle on one side surface of the pattern was 45°, and an inclined angle on the other side was the same as 45°.

(32) After forming a pattern (shape of FIG. 12) by coating an ultraviolet curable resin on a PET substrate layer, an AlO.sub.xN.sub.y (0 x, 0.1=y=light absorbing layer was formed on the pattern of the substrate using a reactive sputtering method by adding nitrogen. On the light absorbing layer, Al having a thickness of 100 nm was deposited using a sputtering method to form a light reflective layer (Al, thickness 120 nm).

(33) The pattern shape was formed in a structure repeating a symmetric prism structure, and an inclined angle on one side surface of the pattern was 45°, and an inclined angle on the other side was employed as 45°. Herein, a pitch of the patterns was 100 micrometers, and a height of the pattern was 25 micrometers. Light entered to the substrate side of the obtained sample, passed through the light absorbing layer, and light reflected on the light reflective layer may be observed from the substrate side.

Example 8

(34) A decoration element was prepared in the same manner as in Examples 5 to 7, except that, by forming the pattern shape as in FIG. 19, the deposition thickness of the light absorbing layer on the left side inclined surface was 5.7 nm, and the deposition thickness of the light absorbing layer on the right side inclined surface was 3.7 nm, based on the vertex of the triangle of the cross-section of the light absorbing layer. An image of the color in a vertical direction on the inclined surface of the obtained sample is shown in FIG. 21.

Example 9

(35) A decoration element was prepared in the same manner as in Example 8 except that, based on the vertex of the triangle of the cross-section of the light absorbing layer, the deposition thickness of the light absorbing layer on the left side inclined surface was 19.0 nm, and the deposition thickness of the light absorbing layer on the right side inclined surface was 12.2 nm. An image of the color in a vertical direction on the inclined surface of the obtained sample is shown in FIG. 21.

Comparative Example 2

(36) A decoration element was prepared in the same manner as in Example 8 except that the pattern shape is formed to have a both side symmetrical inclined surface as in FIG. 20, and the deposition thickness of the light absorbing layer on the inclined surface of the light absorbing layer was uniform as 6.3 nm. An image of the color in a vertical direction on the inclined surface of the obtained sample is shown in FIG. 21.

Evaluation Example 1 Visual Evaluation of Dichroism

(37) A visual evaluation of dichroism was performed for Examples 1 to 4 and Comparative Example 1 using a visual examination method. FIG. 5(a) and FIG. 5(b) are each an image of a right side view and a left side view of Example 1.

Evaluation Example 2 Visual Evaluation of Dichroism

(38) FIG. 30 shows viewing angle-dependent color changes in the decoration element according to Example 1 and the decoration element according to Comparative Example 1.

(39) It was identified that, whereas the decoration element according to Example 1 exhibited dichroism expressing different colors depending on a viewing angle, the decoration element according to Comparative Example 1 expressed just one color.

(40) FIG. 31 measures and compares brightness values (L*), color values (*a) and saturation values (*b) of the decoration element according to Example 1 and the decoration element according to Comparative Example 1 in CIE L*a*b color space depending on a viewing angle.

(41) In Example 1, it was identified that the brightness value (L*) and the saturation value (*b) significantly changed as the viewing angle changed.

(42) Meanwhile, in Comparative Example 1, it was identified that the brightness value (L*) and the saturation value (*b) did not significantly change even when the viewing angle changed.

Examples 10 to 12

(43) After forming a light reflective layer (Al, thickness 120 nm) by depositing Al on glass having a dichroism pattern as in FIG. 24 using a sputtering method, an AlON (Al 58 at %, O 3.5 at %, N 38.5 at %) light absorbing layer was formed thereon using a reactive sputtering method by adding nitrogen. On the light absorbing layer, a red color film was formed from a red pigment-dispersed solution using a wet coating process. Structures and properties for measuring properties of the red color film itself are shown in FIGS. 25 and 26.

(44) The colors recognized through the air of the decoration members prepared in these Examples were calculated using reflectance (SCI, Specular Component Included) in a visible region measured using a CM-2600d device manufactured by Konica Minolta Inc. Specific conditions for the color conversion were based on a D65 light source and a 10° observer. The calculated results are shown in FIG. 27. Herein, the thickness of the side seen from the low angle of the light absorbing layer and the thickness of the side seen from the high angle was 30 nm and 10 nm, respectively, in Example 10, 80 nm and 30 nm, respectively, in Example 11, and 140 nm and 50 nm, respectively, in Example 12.

Examples 13 to 15

(45) A decoration element was prepared in the same manner as in Examples 10 to 12 except that a blue color film was used instead of the red color film. Structures and properties for measuring properties of the blue color film itself are shown in FIGS. 25 and 26.

(46) Results of calculating the colors recognized through the air of the decoration members prepared in these Examples as in Example 10 are shown in FIG. 27. Herein, the thickness of the side seen from the low angle of the light absorbing layer and the thickness of the side seen from the high angle was 30 nm and 10 nm, respectively, in Example 13, 80 nm and 30 nm, respectively, in Example 14, and 140 nm and 50 nm, respectively, in Example 15.

Examples 16 to 18

(47) A decoration element was prepared in the same manner as in Examples 10 to 12 except that a gold color film was used instead of the red color film. Structures and properties for measuring properties of the gold color film itself are shown in FIGS. 25 and 26.

(48) Results of calculating the colors recognized through the air of the decoration members prepared in these Examples as in Example 10 are shown in FIG. 27. Herein, the thickness of the side seen from the low angle of the light absorbing layer and the thickness of the side seen from the high angle was 30 nm and 10 nm, respectively, in Example 16, 80 nm and 30 nm, respectively, in Example 17, and 140 nm and 50 nm, respectively, in Example 18.

Examples 19 to 21

(49) A decoration element was prepared in the same manner as in Examples 10 to 12 except that a red color film was formed on, instead of the light absorbing layer, the glass before forming the light absorbing layer from a red pigment-dispersed solution using a wet coating process.

(50) Results of calculating the colors recognized through the glass of the decoration members prepared in these Examples as in Example 10 are shown in FIG. 28. Herein, the thickness of the side seen from the low angle of the light absorbing layer and the thickness of the side seen from the high angle was 30 nm and 10 nm, respectively, in Example 19, 80 nm and 30 nm, respectively, in Example 20, and 140 nm and 50 nm, respectively, in Example 21.

Examples 22 to 24

(51) Results of calculating the colors recognized through the glass of the decoration members prepared in Examples 13 to 15 as in Example 10 are shown in FIG. 28. Herein, the thickness of the side seen from the low angle of the light absorbing layer and the thickness of the side seen from the high angle was 30 nm and 10 nm, respectively, in Example 22, 80 nm and 30 nm, respectively, in Example 23, and 140 nm and 50 nm, respectively, in Example 24.

Examples 25 to 27

(52) Results of calculating the colors recognized through the glass of the decoration members prepared in Examples 16 to 18 as in Example 10 are shown in FIG. 28. Herein, the thickness of the side seen from the low angle of the light absorbing layer and the thickness of the side seen from the high angle was 30 nm and 10 nm, respectively, in Example 25, 80 nm and 30 nm, respectively, in Example 26, and 140 nm and 50 nm, respectively, in Example 27.

Example 28

(53) After forming a blue color film as in Example 13 on glass having a dichroism pattern as in FIG. 24, an aluminum oxynitride layer was formed as a light absorbing layer using reactive sputtering deposition. The deposition process was carried out under a vacuum condition of a base pressure of 3×10.sup.−6 and a process pressure of 3 mTorr, Ar gas was adjusted to 100 sccm, and reactive gas N.sub.2 was adjusted to 14 sccm. On the light absorbing layer, an aluminum layer was deposited to a thickness of 100 nm as a light reflective layer. Results of comparing the colors observed through the glass for the decoration member prepared as above are shown in FIG. 29.

Examples 29 to 33

(54) A hard mold was processed so as to have a pattern of a structure of FIG. 32. A pattern layer having a structure of FIG. 32 was formed by coating a composition comprising an acryl-based resin on a polyethylene terephthalate (PET) substrate layer, compressing the hard mold and then curing with ultraviolet rays. A decoration element was prepared by depositing aluminum to a thickness of 200 nm on the top of the pattern layer using a sputter method to form an inorganic material layer. In the decoration member of each Example, both inclined angles of a convex portion were each 20 degrees and 70 degrees (Example 29), 10 degrees and 70 degrees (Example 30), 20 degrees and 80 degrees (Example 31), 30 degrees and 70 degrees (Example 32) and 30 degrees and 60 degrees (Example 33), and the width was 30 μm. L*, a* and b* values depending on a viewing angle of each Example were measured and shown in FIG. 42 (Example 29), FIG. 43 (Example 30), FIG. 44 (Example 31), FIG. 45 (Example 32) and FIG. 46 (Example 33).

Examples 34 and 35

(55) A hard mold was processed so as to have a pattern of a structure of each of FIGS. 33(a) and (b). The cross-section of the convex portion included a first inclined side and a second inclined side having different inclined angles, and the first inclined side included a straight-line shape, and the second inclined side included a curved-line shape. An inclined angle formed by the first inclined side and the ground was 70 degrees, and an angle formed by the segment and the ground when connecting a top point of the second inclined side and a point where the second inclined side adjoins the ground was 20 degrees. Details on the curved-line shape and the radius of curvature are the same as described above.

(56) L*, a* and b* values depending on a viewing angle of each Example were measured and shown in FIG. 47 (Example 34) and FIG. 48 (Example 35).

Examples 36 and 37

(57) A hard mold was processed so as to have patterns of structures of FIG. 34 and FIG. 36. The cross-section of the convex portion had a trapezoidal shape in which one pair of opposite sides is parallel and comprises a first inclined side and a second inclined side. When the ratios of L1:L2, m1:m2 and o1:o2 of FIG. 36 are all the same, the cross-section shape may be a trapezoid. Example 36 relates to a pattern layer prepared when the L1:L2 ratio was 1:1, and Example 37 relates to a pattern layer prepared when the L1:L2 ratio was 2:1. An inclined angle formed by the first inclined side and the ground was 20 degrees, and an angle formed by the second inclined side and the ground was 70 degrees. L*, a* and b* values depending on a viewing angle of each Example were measured and shown in FIG. 49 (Example 36) and FIG. 50 (Example 37).

Examples 38 and 39

(58) A hard mold was processed so as to have patterns of structures of FIGS. 35(a) and (b). Example 38 exhibited the pattern shape of FIG. 35(a) and Example 39 exhibited the pattern shape of FIG. 35(b). In addition, the inclined angle c1 was 70 degrees, and c2 was 20 degrees. Details on D1 to D3 are the same as described above.

(59) L*, a* and b* values depending on a viewing angle of each Example were measured and shown in FIG. 51 (Example 38) and FIG. 52 (Example 39).

Example 40

(60) A hard mold was processed so as to have a pattern of a structure of FIG. 40. C1 was 20 degrees and c2 was 70 degrees. L*, a* and b* values depending on a viewing angle of Example 40 were measured and shown in FIG. 53.

Comparative Example 3

(61) A decoration member was prepared in the same manner as in Example 29 except that both inclined angles of the convex portion were all the same as 45 degrees. L*, a* and b* values depending on a viewing angle of Comparative Example 3 were measured and shown in FIG. 54.

Evaluation Example 3 Evaluation of Color Ratio Between Prism Patterns

(62) For the decoration members according to Examples 29 to 40 and Comparative Example 3, a viewing angle-dependent color ratio between prism patterns was evaluated, and the results are shown in FIGS. 42 to 54. Descriptions on the drawings for the evaluation results of each Example are the same as described above. For example, FIG. 54 shows L*, and b* values depending on a viewing angle of Comparative Example 3.

(63) In Examples 29 to 40, it was identified that at least one value of L*, a*and b* rapidly changed with the changes in the viewing angle, however, in Comparative Example 3, L*, a and b values were constantly maintained or did not significantly change even when the viewing angle changed.

(64) In Examples 29 to 40, a color difference (E*ab) was able to be significantly developed in the L*a*b* space by any one or more of the L*, a* and b* values significantly changing.

(65) Meanwhile, in Comparative Example 3, even when the viewing angle changed, a color difference (E*ab) was not able to be significantly developed since a and b values were almost constantly maintained, or L* gently changed even when changing.

(66) In each drawing, the color when looking at the decoration element in a viewing angle coordinate system is presented. The coordinate may be represented by (θ, φ). When employing a direction perpendicular to a surface direction of the decoration element as an x axis, and any one direction of the surface direction of the decoration element as an y axis, an angle formed by the x axis and the viewing direction is referred to as θ, and an angle formed by the y axis and the viewing direction is referred to as φ. When the φ is 0 degrees (θ, 0), L*, a* and b* values depending on the changes in the θ were measured. Details on the viewing angle coordinate system may be referred to a document IES type B Reference [IES-LM-75-01 Goniophotometer Types and Photometric Coordinates (title), IES(author), (Illuminating Engineering Society of North America, 2001)], and this is illustrated in FIG. 55.

(67) In addition, the color of the decoration element is presented when θ and φ both changed. FIG. 56 presents an angle of the viewing angle coordinate system.

REFERENCE NUMERAL

(68) P1: Convex Portion or First Convex Portion P2: Second Convex Portion P3: Concave Portion, P4: Third Convex Portion 10: Pattern Layer 201: First Inorganic Material Layer 202: Second Inorganic Material Layer H1, H2, H3: Height W1, W2, W3: Width, S1, S2, S3, S4, S5, S6: Inclined Surface, a1, a4, a7: Vertex Angle, a2, a3, a5, a6, a8, a9: Inclined Angle C1: First Area C2: Second Area