Decorative components and display devices

Abstract

To provide decorative components and display devices with excellent visibility. [Solution] A decorative member that transmits light from a light source, comprising a base material, a printed material having a base material layer and a pattern printing layer, and a double-sided tape positioned between the base material and the printed material, wherein the double-sided tape has a base material sheet and a pair of adhesive layers provided on both sides of the base material sheet, and the total thickness of the pair of adhesive layers is 20 μm or more and 80 μm or less.

Description

Technical Field

[0004] , ,

[0006] , ,

[0005] , , ,

[0007] , ,

[0001] The present disclosure relates to a decorative member and a display device.

Background Art

[0002] Conventionally, as a decorative sheet for walls and the like, a printed matter including a base material and a printed layer provided on the surface of the base material, and the printed layer has a pattern such as a wood grain pattern or an abstract pattern is known. Also, a printed matter having visible light transmittance is known (for example, Patent Document 1 below).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

[0008] When a printed material has an uneven surface on the substrate side, slight unevenness is also created on the pattern printing layer side when the printed material and substrate are bonded together. This unevenness can hinder adhesion between the printed material and the substrate, potentially reducing visibility. If the combined thickness of the pair of adhesive layers is 20 μm or more, the adhesive layers conform to the uneven surface of the printed material, improving adhesion between the printed material and the substrate. Furthermore, if the combined thickness of the pair of adhesive layers is 80 μm or less, the obstruction of image transmission by the double-sided tape can be suppressed. As a result, the decorative component will have excellent visibility.

[0009] The base sheet thickness of the double-sided tape is between 50 μm and 110 μm. This suppresses the obstruction of image transmission by the double-sided tape. As a result, the decorative components tend to have even better visibility.

[0010] The base sheet may contain polyvinyl chloride. The diffuse transmittance of the double-sided tape may be 9% or less. When the diffuse transmittance of the double-sided tape is within this range, it is possible to suppress the double-sided tape from obstructing the transmission of images. As a result, the decorative component tends to have even better visibility. The haze value of the double-sided tape may be 11 or less. When the haze value of the double-sided tape is within this range, it is possible to suppress the double-sided tape from obstructing the transmission of images. As a result, the decorative component tends to have even better visibility.

[0011] Another aspect of this disclosure is a display device comprising the above-mentioned decorative member and a light source. Such a display device offers excellent visibility. [Effects of the Invention]

[0012] According to this disclosure, a decorative component and a display device with excellent visibility are provided. [Brief explanation of the drawing]

[0013] [Figure 1] Figure 1 is a schematic diagram showing a decorative member and a display device according to one embodiment. [Figure 2] Figure 2(a) is a photograph of the surface of the decorative member of Example 1. Figure 2(b) is a photograph of the surface of the decorative member of Example 2. Figure 2(c) is a photograph of the surface of the decorative member of Comparative Example 1. [Modes for carrying out the invention]

[0014] Embodiments of the decorative component and display device according to this disclosure will be described below with reference to the drawings. In the description of the drawings, the same or equivalent elements are denoted by the same reference numeral, and redundant explanations are omitted as appropriate. For the sake of ease of understanding, some parts of the drawings may be simplified or exaggerated, and the dimensional ratios, etc., are not limited to those shown in the drawings.

[0015] [Decorative components and display devices] Figure 1 is a schematic cross-sectional view showing the display device according to this embodiment. As shown in Figure 1, the display device 101 according to this embodiment comprises a decorative member 1 and a light source 41. The decorative member 1 comprises a printed material 11, double-sided tape 21, and a base material 31 in that order. In the decorative member 1, the base material 31 is located on the light source side. The printed material 11 has a base material layer 12 and a pattern printing layer 13. The decorative member 1 is positioned opposite the light source 41. The decorative member 1 is provided in front of the light source 41 (between the viewer and the light source 41, above in Figure 1).

[0016] The cosmetic member 1 transmits the light L from the light source 41. The light source 41 is, for example, a display device. The light source 41 has a power supply, and the power supply can be switched between ON and OFF. As an example, the light source 41 exhibits black when the power supply is OFF, that is, when it is not irradiating the light L. The cosmetic member 1 has, for example, total light transmittance. Therefore, when the power supply of the light source 41 is ON, that is, when the light source 41 is irradiating the light L, the viewer can visually recognize the light from the light source 41 that has passed through the cosmetic member 1. When the power supply of the light source 41 is OFF, the viewer can visually recognize the pattern expressed by the cosmetic member 1.

[0017] The display device may be an LED, a liquid crystal, an organic EL, etc. When it has a local dimming function, the image can be made clearer.

[0018] The visible light transmittance of the cosmetic member 1 is preferably 10% or more. When the lower limit value of the visible light transmittance is within such a range, when the cosmetic member 1 is placed in front of the light source, the pattern printing layer 13 becomes difficult to be visually recognized by the light of the light source, and the image of the light source etc. is more clearly visually recognized. Also, the light L from the light source 41 can be easily passed through the cosmetic member 1. The visible light transmittance of the cosmetic member 1 is preferably 70% or less. When the upper limit value of the visible light transmittance is within such a range, even if the light source is black, it is possible to suppress the pattern of the pattern printing layer 13 from looking dark. Also, the pattern of the pattern printing layer 13 can be clearly displayed.

[0019] The diffusion transmittance of the cosmetic member 1 may be 0% or more. The diffusion transmittance of the cosmetic member 1 may be 20% or less, or 11% or less.

[0020] The haze value of the cosmetic member 1 may be 0 or more. The haze value of the cosmetic member 1 may be 60 or less.

[0021] In this specification, the "visible light transmittance", "diffusion transmittance" and "haze value" are values measured using a spectrophotometer (for example, manufactured by Shimadzu Corporation, trade name "UV-3600i Plus").

[0022] Printed matter The printed matter will be described below. The printed matter 11 has a concavo-convex shape on the surface 11a on the substrate layer 12 side. In the present embodiment, the concavo-convex shape is provided on the substrate layer 12. The concavo-convex shape is not particularly limited, and examples thereof include wood grain, unevenness on the surface of slate, texture on the surface of cloth, satin finish, graining, hairline, and multiple linear grooves.

[0023] The substrate layer 12 has recesses H that constitute the concavo-convex shape. In a cross-section extending along the thickness direction (the vertical direction in FIG. 1) of the printed matter 11, the recess H is, for example, V-shaped. However, the shape of the recess H in the cross-section is not limited to V-shaped, and may be U-shaped or rectangular, and can be appropriately changed.

[0024] For example, the printed matter 11 has a plurality of recesses H. For example, the plurality of recesses H are dispersedly arranged on the surface 11a. As an example, the plurality of recesses H are dispersedly arranged substantially evenly on the surface 11a. "The plurality of recesses H are dispersedly arranged substantially evenly" indicates a state where the recesses are arranged evenly. For example, it includes a state where the recesses are arranged symmetrically with each other, a state where the recesses are arranged in a grid pattern, a state where the recesses are arranged in a staggered pattern, or a state where the recesses are dispersedly arranged in a concentric pattern. However, the arrangement pattern of the recesses is not particularly limited. The arrangement pattern of the plurality of recesses H may be adjusted according to the aspect of the pattern printing layer 13.

[0025] For example, the depth D of the recess H may be 3 μm or more and may be 30 μm or less. The depth D of the recess H indicates the length in the thickness direction of the printed matter 11 from the surface 11a of the printed matter 11 to the innermost part of the recess H.

[0026] The visible light transmittance of the printed material 11 may be, for example, 10% or more and 70% or less. A visible light transmittance of 10% or more allows light L from the light source 41 to pass through the printed material 11 more easily. A visible light transmittance of 70% or less allows the pattern of the pattern printing layer 13 to be displayed clearly. Furthermore, when the visible light transmittance is 70% or less, even if the light source is black, the pattern of the pattern printing layer 13 will not appear dark. The visible light transmittance of the printed material 11 may be, for example, 30% or more. When the visible light transmittance is 30% or more, when the printed material 11 is placed in front of the light source, the pattern printing layer 13 becomes less visible due to the light from the light source, and the image of the light source, etc., becomes more clearly visible.

[0027] The following describes each layer of printed material 11.

[0028] ((Base material layer)) The substrate layer 12 is a substrate that transmits visible light. The substrate layer 12 is, for example, made of a transparent resin. Examples of transparent resins include PET (polyethylene terephthalate), PMMA (polymethyl methacrylate), polyethylene, polypropylene, and nylon. The substrate layer 12 may also be a glass substrate. The thickness of the substrate layer 12 is, for example, 25 μm or more and 250 μm or less. In the case of a glass substrate, it is, for example, several mm or more and 10 mm or less. The substrate layer 12 may be a single layer or two or more layers.

[0029] ((Picture print layer)) The pattern printing layer 13 is provided on one surface of the substrate layer 12. The pattern printing layer 13 is located between the light source 41 and the substrate layer 12. The pattern printing layer 13 is the layer that expresses the pattern of the printed material 11. The pattern on the pattern printing layer 13 is the pattern that appears on the surface of the printed material 11 when the power to the light source 41 is OFF (when the light source 41 is not irradiating with light L), and is, for example, a wood grain pattern, a stone pattern, or an abstract pattern.

[0030] The method for forming the pattern printing layer 13 is not particularly limited and includes, for example, inkjet printing, screen printing, gravure printing, or offset printing. The thickness of the pattern printing layer 13 is not particularly limited, but is preferably between 1 μm and 15 μm. As an example, the pattern printing layer 13 may contain a curing agent. In this case, the heat resistance and adhesion of the pattern printing layer 13 can be improved.

[0031] The pattern printing layer 13 is a layer that expresses the pattern of the printed material 11. The pattern printing layer 13 includes a first color pattern layer 13A provided on one surface of the substrate layer 12, and a second color pattern layer 13B provided on top of the first color pattern layer 13A.

[0032] The first color pattern layer 13A can be formed on the surface of the substrate layer 12 by, for example, screen printing, inkjet printing, gravure printing, or offset printing. The first color pattern layer 13A is composed of a plurality of first color dots. Here, in this specification, "dot" means a point that constitutes an element of the printed image, and its shape is not limited to a circle, but may be a rectangle, polygon, or other shape. Each of the plurality of first color dots contains a first color binder and a plurality of first color pigment chips dispersed inside the first color binder. The content of the plurality of first color pigment chips is, for example, in the range of 0.5 parts by weight or more and 20 parts by weight or less, when the first color binder is 100 parts by weight.

[0033] Examples of binders for the first color include vinyl resins, acrylic resins, thermoplastic urethane resins, polyester resins, and polycarbonate resins. The thickness of the first color pattern layer 13A is, for example, 1 μm to 10 μm. The first color pattern layer 13A may contain a curing agent. In this case, the heat resistance of the first color pattern layer 13A and the adhesion of the first color pattern layer 13A to the substrate layer 12 can be improved.

[0034] Multiple first-color pigment chips are first-interference pigments of multiple colors that generate different interference light from each other. Each of the multiple-color first-interference pigments consists of a thin flake that transmits visible light and a metal oxide film that covers the flake. Of the light incident from the substrate layer 12 to the first-color pattern layer 13A, the light reflected at the surface of the metal oxide film and the light that passes through the metal oxide film and is reflected at the surface of the flake interfere with each other, generating interference light. By adjusting the thickness of the metal oxide film and the refractive index of the metal oxide film, interference light with a desired wavelength can be generated.

[0035] Each of the multiple first interference pigments is titanium dioxide-coated mica. The particle size range of the titanium dioxide-coated mica includes, for example, a range of 25 μm to 60 μm. In this specification, "particle size" means the longest diameter of the particle cross-section. The flakes constituting the first interference pigment may be other than mica, for example, silica, alumina, glass, or polysilicate. The metal oxide film constituting the first interference pigment may be other than titanium dioxide, for example, zirconium oxide, zinc oxide, iron oxide, or tin oxide.

[0036] When light L is incident on the first color pattern layer 13A from each of the multiple first interference pigments, different first interference lights are generated from each of them. The wavelength characteristics of each of the different first interference lights are different from each other. In other words, the wavelength characteristics of the interference light generated from the first color pattern layer 13A consist of two types of wavelength characteristics. The first interference pigments exhibit color mixing. Each of the first interference pigments is, for example, a red interference pigment (red pearl pigment) and a gold interference pigment (gold pearl pigment). In this case, each of the first interference lights exhibits red and gold, respectively. The proportions of each first interference pigment may be the same or may be different from each other.

[0037] The second color pattern layer 13B can be provided on the first color pattern layer 13A by, for example, screen printing, inkjet printing, gravure printing, or offset printing. The second color pattern layer 13B is composed of a plurality of second color dots. Each of the plurality of second color dots contains a second color binder and a plurality of second color pigment chips dispersed inside the second color binder. The content of the plurality of second color pigment chips is, for example, in the range of 0.5 parts by weight or more and 20 parts by weight or less, when the amount of second color binder is 100 parts by weight.

[0038] Examples of binders for the second color include vinyl resins, acrylic resins, thermoplastic urethane resins, polyester resins, and polycarbonate resins. The thickness of the second color pattern layer 13B is, for example, 1 μm to 10 μm. The second color pattern layer 13B may contain a curing agent. In this case, the heat resistance of the second color pattern layer 13B and the adhesion of the second color pattern layer 13B to the first color pattern layer 13A can be improved.

[0039] Multiple second-color pigment chips are second-interference pigments that generate a single interference light different from the color mixing shown by the first interference pigment. The second-interference pigment consists of a thin flake that transmits visible light and a metal oxide film covering the flake. Of the light incident from the substrate layer 12 to the second-color pattern layer 13B, the light reflected at the surface of the metal oxide film and the light that passes through the metal oxide film and is reflected at the surface of the flake interfere, generating interference light. By adjusting the thickness of the metal oxide film and the refractive index of the metal oxide film, interference light with a desired wavelength can be generated.

[0040] The second interference pigment is titanium dioxide-coated mica. The particle size range of the titanium dioxide-coated mica includes, for example, a range of 25 μm to 60 μm. The flakes constituting the second interference pigment may be other than mica, for example, silica, alumina, glass, or polysilicate. The metal oxide film constituting the second interference pigment may be other than titanium dioxide, for example, zirconium oxide, zinc oxide, iron oxide, or tin oxide.

[0041] When light L is incident on the second color pattern layer 13B from the second interference pigment, a single second interference light is generated. The second interference light generated from each of the multiple second interference pigments has the same wavelength characteristics. In other words, the wavelength characteristics of the interference light generated from the second color pattern layer 13B consist of only one type of wavelength characteristic. The second interference pigment can be any interference pigment that generates a single second interference light different from the color mixing shown by the first interference pigment, for example, a green interference pigment (green pearl pigment). In this case, the second interference light will be green.

[0042] Next, an example of a method for manufacturing the printed material 11 will be described. First, the base layer 12 is subjected to thermal embossing to form an uneven surface (step for forming the uneven surface). Next, a pattern printing layer 13 is formed on the surface of the base layer 12 opposite to the surface with the uneven surface by printing (step for forming the pattern printing layer). After these steps, the series of steps for manufacturing the printed material 11 is completed.

[0043] (double-sided tape) The double-sided tape 21 will now be described. The double-sided tape 21 has a base sheet 22 and a pair of adhesive layers 23A and 23B provided on both sides of the base sheet 22. In the double-sided tape 21, adhesive layer 23A is located on the printed material 11 side and adhesive layer 23B is located on the base material 31 side.

[0044] The visible light transmittance of the double-sided tape 21 may be 85% or higher, or 90% or higher. The visible light transmittance of the double-sided tape 21 may be 100% or lower. When the lower limit of the visible light transmittance is within this range, the double-sided tape 21 can suppress obstruction of image transmission. As a result, the decorative component 1 tends to have even better visibility.

[0045] The diffuse transmittance of the double-sided tape 21 may be 0% or more. Preferably, the diffuse transmittance of the double-sided tape 21 is 9% or less, and more preferably 3% or less. When the upper limit of the diffuse transmittance is within this range, the double-sided tape 21 can suppress obstruction of image transmission. As a result, the decorative member 1 tends to have even better visibility.

[0046] The haze value of the double-sided tape 21 may be 0 or greater. Preferably, the haze value of the double-sided tape 21 is 11 or less, and more preferably 3 or less. When the upper limit of the haze value is within this range, the double-sided tape 21 can suppress obstruction of image transmission. As a result, the decorative member 1 tends to have even better visibility.

[0047] The following describes each layer of the double-sided tape 21.

[0048] ((Base sheet)) The base sheet 22 is a substrate that transmits visible light. The base sheet 22 is made of, for example, a transparent resin. Examples of transparent resins include polyvinyl chloride, polypropylene, cellophane, polyethylene, polyester, and acetate. From the viewpoint of flexibility, water resistance, weather resistance, and flame retardancy, the resin is preferably polyvinyl chloride.

[0049] The thickness of the base sheet 22 is preferably 50 μm or more, and more preferably 70 μm or more. When the thickness of the base sheet 22 is 50 μm or more, sufficient workability can be ensured, and there is a tendency to suppress tearing when a load is applied to the double-sided tape. The thickness of the base sheet 22 is preferably 110 μm or less, more preferably 100 μm or less, and even more preferably 90 μm or less. When the thickness of the base sheet 22 is 110 μm or less, it is possible to suppress the double-sided tape 21 from obstructing the transmission of images. As a result, the decorative member 1 has even better visibility. The thickness of the base sheet 22 may be 50 μm or more and 110 μm or less, 50 μm or more and 100 μm or less, 50 μm or more and 90 μm or less, 70 μm or more and 110 μm or less, 70 μm or more and 100 μm or less, or 70 μm or more and 90 μm or less.

[0050] ((adhesive layer)) The adhesive layers 23A and 23B are transparent to visible light. For example, adhesives such as urethane-based adhesives, rubber-based adhesives, acrylic-based adhesives, and silicone-based adhesives can be used as the adhesive layers 23A and 23B.

[0051] The combined thickness of the adhesive layers 23A and 23B is 20 μm or more. When the printed material 11 and the substrate 31 are bonded together, the uneven shape of the substrate layer 12 of the printed material 11 affects the pattern printing layer 13, creating slight unevenness. Such unevenness can hinder adhesion between the printed material 11 and the substrate 31, potentially reducing visibility. If the lower limit of the combined thickness of the adhesive layers 23A and 23B is within the above range, the adhesive layers 23A and 23B conform to the uneven shape of the printed material 11, improving adhesion between the printed material and the substrate. As a result, the decorative component 1 has excellent visibility. From a similar viewpoint, the combined thickness of the adhesive layers 23A and 23B is preferably 50 μm or more, and more preferably 60 μm or more. The combined thickness of the adhesive layers 23A and 23B is 80 μm or less. If the upper limit of the combined thickness of adhesive layers 23A and 23B is within the above range, the double-sided tape 21 can suppress obstruction of image transmission. As a result, the decorative member 1 will have excellent visibility. From a similar viewpoint, the combined thickness of adhesive layers 23A and 23B is preferably 70 μm or less. The combined thickness of adhesive layers 23A and 23B may be 20 μm to 80 μm, 20 μm to 70 μm, 50 μm to 80 μm, 50 μm to 70 μm, 60 μm to 80 μm, or 60 μm to 70 μm.

[0052] The thickness of each of the adhesive layers 23A and 23B may be, for example, 10 μm or more, 20 μm or more, 50 μm or more, or 60 μm or more, and may be 80 μm or less, or 70 μm or less.

[0053] ((base material)) The substrate 31 plays the role of supporting the printed material 11. The substrate 31 is a plate-shaped member. The substrate 31 may be a colored transparent panel having a predetermined transmittance. The transmittance of the substrate 31 may be 3% or more, and more preferably 18% or more. Alternatively, the transmittance of the substrate 31 may be 40% or less, and more preferably 28% or less. The lower the transmittance, the more the reflected light from the back surface can be reduced. Therefore, if the brightness of the light source 41 installed on the back surface is high, it is preferable to lower the transmittance of the substrate 31.

[0054] The base material 31 may be a smoked plate in which the plate-shaped member itself is a smoked material. As the material for such a smoked plate, for example, transparent resins such as acrylic, polycarbonate, and polyvinyl chloride, or glass may be used. The thickness of the smoked plate is not particularly limited, but may be, for example, 1 mm or more and 10 mm or less.

[0055] The base material 31 may be a laminate having a transparent plate and a smoked film. For example, PP, PET, PMMA, etc. may be used as the material for the smoked film.

[0056] If the base material 31 is colored, the color of the base material 31 is not particularly limited, and any color may be used, for example, gray, brown, or blue. The method of coloring the base material 31 is not particularly limited. For example, a colored transparent panel base material 31 may be produced by incorporating a coloring substance such as a pigment or dye into the material of the transparent panel and forming it into a plate. If the smoke film is replaced with a thin colored layer by printing, printing methods such as screen printing, inkjet printing, gravure printing, or offset printing may be used. In addition, the base material 31 can be made of various colors, and the color may be the color of the wall of your choice, so the color is not limited.

[0057] The base material 31 may control the color tone of the printed material 11 depending on the color of the base material 31. For example, if the base material 31 is brown and the pattern of the pattern printing layer 13 is wood grain, a brownish wood grain can be seen from the front side of the display device 101.

[0058] The above describes a decorative member and display device according to one embodiment. However, the decorative member and display device according to this disclosure are not limited to the embodiments described above, and may be modified within the scope of the gist described in the claims. That is, the configuration, shape, size (thickness), material, number, and arrangement of each part of the decorative member and display device can be appropriately changed within the scope of the gist described above.

[0059] For example, the printed material may further comprise a plurality of substrate layers. For example, the printed material may have a first substrate layer and a second substrate layer. The printed material may comprise the first substrate layer, the pattern printing layer and the second substrate layer in this order. Alternatively, the printed material may comprise the first substrate layer, the second substrate layer and the pattern printing layer in this order. The first substrate layer may be the substrate layer 12 according to the above embodiment.

[0060] ((2nd base layer)) The second substrate layer is a substrate that transmits visible light. The second substrate layer is, for example, made of a transparent resin. From the viewpoint of weather resistance, the transparent resin is preferably polyethylene, polypropylene, polyethylene naphthalate, polycarbonate, or acrylic. The thickness of the second substrate layer is, for example, 25 μm or more and 250 μm or less.

[0061] For example, printed materials may have an additional surface protection layer on the surface of the substrate layer. The surface protection layer is also called a coating layer (topcoat layer). The surface protection layer is provided to ensure the weather resistance of the printed material, etc.

[0062] ((Surface protective layer)) The surface protective layer is made of resin. For example, the surface protective layer is composed of an acrylic resin. For example, the surface protective layer may contain a matting agent. For example, the matting agent is composed of silica (silicon dioxide). The printed material exhibits an effect of reducing gloss by having a surface protective layer. For example, the surface protective layer is thinner than the base layer. For example, the thickness of the surface protective layer is 1 μm or more and 10 μm or less.

[0063] The printed material may further comprise a white pattern layer, which is provided on top of the second color pattern layer and consists of multiple silver dots. Each of the multiple silver dots may contain a silver binder and multiple silver pigment chips dispersed within the silver binder.

[0064] The printed material may further include a transparent smoke printing layer provided on the outermost surface opposite the substrate layer to the image printing layer.

[0065] [Summary of this disclosure] The summary of this disclosure is as follows: [1] A decorative member that transmits light from a light source, Substrate and A printed material having a base layer and a pattern printing layer, A double-sided tape positioned between the above-mentioned substrate and the above-mentioned printed material, Equipped with, The above double-sided tape comprises a base sheet and a pair of adhesive layers provided on both sides of the base sheet. A decorative component in which the total thickness of the pair of adhesive layers described above is 20 μm or more and 80 μm or less. [2] The decorative member according to [1], wherein the thickness of the base sheet is 50 μm or more and 110 μm or less. [3] The decorative member according to [1] or [2], wherein the base sheet contains polyvinyl chloride. [4] The decorative component according to any one of [1] to [3], wherein the diffusion transmittance of the double-sided tape is 9% or less. [5] The decorative material described in any of [1] to [4], wherein the haze value of the double-sided tape is 11 or less. [6] A decorative component as described in any of [1] to [5], Light source and A display device equipped with the following features. [Examples]

[0066] The present disclosure will be described below based on examples. However, this disclosure is not limited to the following examples.

[0067] [Manufacturing of printed materials] (Examples 1-4, Comparative Examples 1 and 2) A transparent polypropylene film (thickness: 100 μm, hereinafter also simply referred to as "transparent PP film") was prepared as the base layer. A wood grain pattern was heat-embossed onto one surface of the transparent PP film. This resulted in a base layer with a wood grain pattern formed on its surface. A surface protection layer (acrylic resin) was coated onto the base layer. This formed a surface protection layer with a wood grain pattern. A first color pattern layer was formed on the side of the base layer opposite the surface protection layer by screen printing. The first color pattern layer was formed using an ink composed of a first color binder (urethane resin) and a first interference pigment dispersed within the first color binder. A green interference pigment with a particle size range of 10 μm to 40 μm was used as the first interference pigment. The content of the green interference pigment was 4 parts by weight when the first color binder was 100 parts by weight. A second color pattern layer was formed on top of the first color pattern layer by screen printing. The second color pattern layer was formed using an ink composed of a second color binder (urethane resin) and a second interference pigment dispersed within the second color binder. As the second interference pigment, a red interference pigment with a particle size range of 10 μm to 40 μm and a gold interference pigment with a particle size range of 10 μm to 60 μm were used. The content of the red and gold interference pigments was 8 parts by weight of the red interference pigment and 5 parts by weight of the gold interference pigment, based on 100 parts by weight of the second color binder. In this way, a wood grain pattern printing layer was formed. A translucent smoke printing layer was formed on top of the second color pattern layer. The translucent smoke printing layer was provided by screen printing using an ink in which a small amount of carbon black was dispersed in a resin binder (urethane resin). This resulted in a printed material having the translucent smoke printing layer, second color pattern layer, first color pattern layer, substrate layer, and surface protection layer in this order.

[0068] [Manufacturing of decorative components] The following materials were prepared as the base material and double-sided tape for the decorative components. The total light transmittance, diffuse transmittance, and haze value of the double-sided tape were measured using the method described later. (base material) Base material 1: Acrylic resin, 3mm thick, visible light transmittance 19%, gray smoke Base material 2: Acrylic resin, 3mm thick, 40% visible light transmittance, gray smoke (double-sided tape) Double-sided tape A: A double-sided tape having a laminated structure comprising a first adhesive layer (acrylic resin, thickness: 31 μm), a base sheet (polyvinyl chloride, thickness: 80 μm), and a second adhesive layer (acrylic resin, thickness: 34 μm) in this order; visible light transmittance: 91.9%, diffuse transmittance: 0.7%, haze value: 0.7 Double-sided tape B: A double-sided tape having a laminated structure comprising a first adhesive layer (acrylic resin, thickness: 10 μm), a base sheet (polypropylene nonwoven fabric, thickness: 105 μm), and a second adhesive layer (acrylic resin, thickness: 10 μm) in this order; visible light transmittance: 85.5%, diffuse transmittance: 8.7%, haze value: 10.2 Double-sided tape C: A double-sided tape having a laminated structure comprising a first adhesive layer (acrylic resin, thickness: 7 μm), a base sheet (polypropylene nonwoven fabric, thickness: 114 μm), and a second adhesive layer (acrylic resin, thickness: 7 μm) in this order; visible light transmittance: 82.2%, diffuse transmittance: 9.5%, haze value: 11.6

[0069] (Example 1) A decorative component was obtained by bonding the base material 1 and the printed material together using double-sided tape A. The base material 1 and the printed material were bonded together so that the transparent smoke printing layers of the base material 1 and the printed material faced each other.

[0070] (Example 2) A decorative component was obtained in the same manner as in Example 1, except that double-sided tape B was used instead of double-sided tape A.

[0071] (Comparative Example 1) A decorative component was obtained in the same manner as in Example 1, except that double-sided tape C was used instead of double-sided tape A.

[0072] (Example 3) A decorative component was obtained in the same manner as in Example 1, except that base material 2 was used instead of base material 1.

[0073] (Example 4) A decorative component was obtained in the same manner as in Example 2, except that base material 2 was used instead of base material 1.

[0074] (Comparative Example 2) A decorative component was obtained in the same manner as in Comparative Example 1, except that base material 2 was used instead of base material 1.

[0075] [Measurement of visible light transmittance] The visible light transmittance of the decorative components in each example was measured. The results are shown in Table 1. In addition, the visible light transmittance of double-sided tapes A to C was measured. A spectrophotometer (Shimadzu Corporation, product name "UV-3600i Plus") was used to measure the visible light transmittance of the decorative components and double-sided tapes.

[0076] [Measurement of diffuse transmittance and haze value] The diffuse transmittance and haze value were measured for each example of decorative material. The results are shown in Table 1. In addition, the diffuse transmittance and haze value were measured for double-sided tapes A to C. The "diffuse transmittance" and "haze value" were measured using a spectrophotometer (Shimadzu Corporation, product name "UV-3600i Plus").

[0077] [Table 1]

[0078] [Evaluation of visibility] (Examples 1 and 2, Comparative Example 1) A liquid crystal display was prepared as the display. A display device was obtained by placing a decorative member in front of the display surface of the display. The decorative member was installed so that the transparent smoke printing layer faced the display surface of the display. The display was turned on, and the visibility of the image displayed on the display through the decorative member was evaluated. In Example 1, the image displayed on the display was displayed very clearly, and even the fine details could be seen. In Example 2, although inferior to Example 1, the image displayed on the display was displayed clearly, and even the fine details could be seen. In Comparative Example 1, the image displayed on the display was displayed on the surface of the decorative member, but even the fine details could not be seen. A photograph of the surface of the decorative member of Example 1 is shown in Figure 2(a), a photograph of the surface of the decorative member of Example 2 is shown in Figure 2(b), and a photograph of the surface of the decorative member of Comparative Example 1 is shown in Figure 2(c). [Explanation of Symbols]

[0079] 1... Decorative material, 11... Printed material, 12... Base material layer, 13... Pattern printing layer, 21... Double-sided tape, 22... Base material sheet, 23A, 23B... Adhesive layer, 31... Base material, 41... Light source, 101... Display device, L... Light.

Claims

1. A decorative component that transmits light from a light source, Substrate and A printed material having a base layer and a pattern printing layer, A double-sided tape positioned between the substrate and the printed material, Equipped with, The double-sided tape comprises a base sheet and a pair of adhesive layers provided on both sides of the base sheet. A decorative member in which the total thickness of the pair of adhesive layers is 20 μm or more and 80 μm or less.

2. The decorative member according to claim 1, wherein the thickness of the base sheet is 50 μm or more and 110 μm or less.

3. The decorative member according to claim 1, wherein the base sheet contains polyvinyl chloride.

4. The decorative member according to claim 1, wherein the diffusion transmittance of the double-sided tape is 9% or less.

5. The decorative member according to claim 1, wherein the haze value of the double-sided tape is 11 or less.

6. A decorative member according to any one of claims 1 to 5, Light source and A display device equipped with the following features.

Images