Decorative sheet and production method

Abstract

To provide a decorative sheet which can be facilitated in layer constitution and electric constitution, and can suppress a design region of a design layer from being seen through on a surface of a skin layer in backlight light-out, and a production method of the same.SOLUTION: A decorative sheet 1 comprises: a light permeable skin layer 3; an intermediate layer 4 arranged on the rear side of the skin layer 3; and a design layer 5 which has a design region 50 where a prescribed design is drawn and is arranged on the rear side of the intermediate layer 4. The skin layer 3 has a display region 30 where the design is displayed by light radiated to the design region 50 from the rear side. The design region 50 is arranged over the whole surface of the display region 30 from the front side without a gap, and has light permeability higher than that of the intermediate layer 4.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a decorative sheet used for, for example, interior members of a vehicle and a method for manufacturing the same.

Background Art

[0002] In the field of vehicle interiors, development of a decorative sheet whose design visible from the interior of the vehicle can be switched by turning on and off a backlight is in progress. For example, Patent Document 1 discloses a display device including a surface protection layer, a pattern layer and a void portion, a base material, a dimming sheet, a light-emitting display (display), and a display control device. The surface protection layer, the pattern layer and the void portion, the base material, the dimming sheet, and the light-emitting display are laminated and arranged in this order from the front side (the vehicle interior side) toward the back side. The display control device is arranged separately from these members.

[0003] The surface protection layer is colorless and transparent. The pattern layer has patterns such as wood grain conduit patterns and marble patterns printed thereon. The pattern layer is printed on the surface of the base material. The void portion is juxtaposed with the pattern layer. The void portion corresponds to a portion of the surface of the base material where the pattern layer is not printed.

[0004] The display control device can adjust the light transmittance of the dimming sheet according to the lighting and extinguishing of the light-emitting display. Specifically, the display control device can adjust the light transmittance of the dimming sheet so as to transmit light when the light-emitting display is lit and not to transmit light when the light-emitting display is extinguished.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the case of the display device of the same document, a dimming sheet is essential. Further, adjustment of the light transmittance of the dimming sheet by the display control device is essential. For this reason, the layer structure and the electrical structure become complicated. Further, in the case of the display device of the same document, when the light-emitting display body is lit, the pattern layer and the void portion juxtaposed to each other cooperate to display a desired design on the surface of the surface protection layer.

[0007] Here, the pattern layer and the void portion are laminated directly behind the surface protection layer without intervening other layers. Further, the pattern layer has low light transmittance, and the void portion has high light transmittance. For this reason, the contrast becomes prominent and the boundary between the pattern layer and the void portion is likely to be sharpened. Therefore, when the light-emitting display body is turned off, the pattern layer and the void portion may be displayed through the surface of the surface protection layer.

[0008] Therefore, an object of the present disclosure is to provide a decorative sheet and a method for manufacturing the same, which have a simple layer structure and an electrical structure and can suppress the design area of the design layer from being displayed through the surface of the skin layer when the backlight is turned off.

Means for Solving the Problems

[0009] (1) In order to solve the above problems, the decorative sheet of the present disclosure includes a skin layer having light transmittance, an intermediate layer disposed on the back side of the skin layer, and an intermediate layer disposed on the back side of the intermediate layer and having a design region in which a predetermined design is drawn. A decorative sheet comprising a design layer, wherein the skin layer has a display region in which the design is displayed by light irradiated from the back side to the design region, and the design region is disposed without a gap over the entire surface of the display region when viewed from the front side, and has higher light transmittance than the intermediate layer.

[0010] According to this configuration, a member for adjusting the light transmittance of the layer (for example, the display control device or the dimming sheet of Patent Document 1) is not essential. Therefore, the layer configuration and the electrical configuration are simple. In addition, the design area of the design layer is arranged without gaps across the entire display area when viewed from the front side. Therefore, there is no boundary itself between the design part and the gap in the design area. Therefore, when the backlight is turned off, it is possible to suppress the design area of the design layer from being displayed through the surface of the skin layer.

[0011] Suppose that the design layer has lower light transmittance than the intermediate layer. In this case, the intermediate layer is more likely to be seen through than the design layer. Therefore, when the backlight is turned off, it is easy for the design area of the design layer to be seen through the intermediate layer and displayed on the surface of the skin layer.

[0012] In this regard, according to this configuration, the design layer has higher light transmittance than the intermediate layer. Therefore, the intermediate layer is less likely to be seen through than the design layer. Therefore, when the backlight is turned off, it is possible to suppress the design area of the design layer from being seen through the intermediate layer and displayed on the surface of the skin layer.

[0013] (1-1) In the configuration of (1) above, the skin layer preferably has a configuration with uneven portions on the surface. According to this configuration, when the backlight is turned off, external light can be diffusely reflected between the uneven portions of the uneven portions. Therefore, it is possible to blur the boundary portion of the design area of the design layer (for example, when the design area of the design layer has a wood grain pattern, the portion where the shade of the wood grain stands out, etc.). Therefore, it is possible to suppress the boundary portion of the design area from being seen through and displayed on the surface of the skin layer.

[0014] (1-2) In the configuration of (1) above, the design layer preferably has a configuration of a printing layer in which a predetermined pattern is formed by printing. According to this configuration, it is possible to suppress variations in the layer thickness of the design layer compared to the case where the design layer is a coating film or the like. In addition, it is possible to suppress the layer thickness of the design layer from becoming excessively large.

[0015] (2) In the configuration of (1) above, it is preferable that the visible light transmittance of the intermediate layer is 3% or more and 50% or less. In the present disclosure, "visible light" refers to electromagnetic waves in the wavelength range that can be sensed as light by the human eye. The wavelength range of visible light is, for example, 360 nm or more and 830 nm or less. Also, the "visible light transmittance" τ refers to the ratio of visible light passing through a sample (for example, the intermediate layer, the design layer, etc.). Using I0 as the luminous intensity of the incident light and I as the luminous intensity of the light passing through the sample, the visible light transmittance τ (%) = (I / I0) × 100. According to this configuration, compared with the case where the visible light transmittance is less than 3%, the visibility of the design in the design area when the backlight is lit can be improved. Also, compared with the case where the visible light transmittance exceeds 50%, it is possible to suppress the design in the design area from being displayed transparently on the surface of the skin layer when the backlight is turned off.

[0016] (3) In the configuration of (1) above, it is preferable that the visible light transmittance of the design area is 5% or more and 90% or less. According to this configuration, compared with the case where the visible light transmittance is less than 5%, it is possible to suppress the design in the design area from being displayed transparently on the surface of the skin layer when the backlight is turned off. Also, compared with the case where the visible light transmittance exceeds 90%, the visibility of the design in the design area when the backlight is lit can be improved.

[0017] (4) In the configuration of (1) above, it is preferable that it is configured to be arranged on an interior member of a vehicle. According to this configuration, by switching the backlight on and off, the design of the interior member can be given a two-sided property.

[0018] (5) In order to solve the above problems, a method for manufacturing a decorative sheet according to the present disclosure includes an epidermal layer having light transmissivity, an intermediate layer disposed on the back side of the epidermal layer, and a design layer disposed on the back side of the intermediate layer and having a design region with a predetermined design drawn thereon. The epidermal layer has a display region in which the design is displayed by light irradiated from the back side to the design region. The design region is disposed without gaps across the entire surface of the display region as viewed from the front side, and has higher light transmissivity than the intermediate layer. A method for manufacturing a decorative sheet, characterized in that it includes an intermediate layer printing step of printing the intermediate layer on the back surface of the epidermal layer, and a design layer printing step of printing the design layer on the back surface of the intermediate layer.

[0019] According to this configuration, for example, compared with the case where the intermediate layer is a coating film or the like, variations in the layer thickness of the intermediate layer can be suppressed. Also, it is possible to suppress the intermediate layer from becoming excessively thick. The design layer also has the same effect as the intermediate layer. Further, displacement in the layer direction (layer expansion direction; a direction intersecting the lamination direction) between the three layers (epidermal layer, intermediate layer, design layer) can be suppressed.

Effects of the Invention

[0020] According to the decorative sheet and the method for manufacturing the same of the present disclosure, the layer configuration and the electrical configuration are simplified. Also, it is possible to suppress the design region of the design layer from being displayed transparently on the surface of the epidermal layer when the backlight is turned off.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0022] Hereinafter, embodiments of the decorative sheet and its manufacturing method of the present disclosure will be described.

[0023] <First Embodiment> FIG. 1 shows a partial perspective view of a door trim in which the decorative sheet of this embodiment is arranged. FIG. 2 shows a perspective view within frame II of FIG. 1. FIG. 3 shows an exploded perspective view within frame II of FIG. 1. FIG. 4 shows a cross-sectional view in the IV-IV direction (front-back direction cross-sectional view) of FIG. 2.

[0024] (Arrangement and Configuration of Decorative Sheet) First, the arrangement and configuration of the decorative sheet of this embodiment will be described. As shown in FIG. 1, the decorative sheet 1 is arranged on the door trim 9 of the passenger compartment. The door trim 9 is included in the concept of the "interior member" of the present disclosure. As shown in FIGS. 1 to 4, the door trim 9 includes the decorative sheet 1 and the light source unit 8. The decorative sheet 1 and the light source unit 8 are laminated in this order from the front side (upper side, passenger compartment side) to the back side (lower side, outside of the vehicle).

[0025] As shown in FIGS. 3 to 4, the decorative sheet 1 includes a skin layer 3, an intermediate layer 4, and a design layer 5 from the front side to the back side. As shown in FIG. 1, the surface (upper surface) of the skin layer 3 is exposed in the passenger compartment. The skin layer 3 is made of synthetic leather and has a layered shape. The skin layer 3 has light transmissibility and flexibility. The skin layer 3 has a display area 30 and a dimpled portion (concave-convex portion) 31 on the surface. The dimpled portion 31 is arranged over the entire surface of the skin layer 3. The design area 50 described later is irradiated with light from the light source unit 8 on the back side. By the light, the wood grain pattern of the design area 50 is displayed in the display area 30.

[0026] The intermediate layer 4 is disposed on the back side of the skin layer 3. The intermediate layer 4 is made of a light-transmissive ink and has a layered form. The intermediate layer 4 has light transmissivity and flexibility. The intermediate layer 4 has lower light transmissivity than the skin layer 3. The intermediate layer 4 is smoky translucent. The intermediate layer 4 is colored transparent.

[0027] The design layer 5 is disposed on the back side of the intermediate layer 4. The design layer 5 is made of a light-transmissive ink and has a layered form. The design layer 5 has light transmissivity and flexibility. The design layer 5 has higher light transmissivity than the intermediate layer 4. The design layer 5 is colored transparent. The design layer 5 has a design area 50 on which a wood grain pattern is displayed when viewed from the front side. The wood grain pattern is included in the concept of the "predetermined design" of the present disclosure. When viewed from the front side, the design area 50, the display area 30, and the light source unit 8 overlap. When viewed from the front side, the design area 50 is disposed without a gap over the entire surface of the display area 30.

[0028] The light source unit 8 is disposed on the back side of the design layer 5 of the decorative sheet 1. The light source unit 8 includes a plurality of light sources (LEDs) 80. The plurality of light sources 80 are distributed over the entire layer direction (layer development direction, a direction intersecting the lamination direction, surface direction) of the light source unit 8. The entire surface of the light source unit 8 is capable of emitting light. The light from the light source 80 reaches the surface of the door trim 9 via the design layer 5, the intermediate layer 4, and the skin layer 3.

[0029] (Function of the decorative sheet) Next, the function of the decorative sheet of the present embodiment will be described. When the light source unit 8 is off, the light source 80 is turned off. That is, the backlight for the decorative sheet 1 is in a state of being turned off. Here, the light transmissivity of each layer is set so that, in descending order, it is the skin layer 3 (the most transparent), the design layer 5, and the intermediate layer 4 (the least transparent). For this reason, it is difficult for the user to visually recognize the design area 50 of the design layer 5 from the front side (inside the vehicle) of the decorative sheet 1. Also, it is easy for the user to visually recognize the three-dimensional shape of the dimpled portion 31 of the display area 30 of the skin layer 3 and the color of the intermediate layer 4 integrally from the front side (inside the vehicle) of the decorative sheet 1.

[0030] When the light source unit 8 is on, the light source 80 is lit. That is, the backlight for the decorative sheet 1 is in the lit state. When the light first passes through the design layer 5 closest to the light source unit 8, the light of the light source unit 8 preferentially displays the color scheme of the design area 50 (i.e., the wood grain pattern), so that the user can easily visually recognize the wood grain pattern. In this way, the decorative sheet 1 can display two types of designs in the display area 30 according to whether the light source unit 8 is on or off.

[0031] (Manufacturing method of decorative sheet) Next, the manufacturing method of the decorative sheet of this embodiment will be described. The manufacturing method of the decorative sheet 1 has an intermediate layer printing process and a design layer printing process. Note that the manufacturing method is executed with the decorative sheet 1 shown in FIGS. 1 to 4 turned upside down. In the intermediate layer printing process, the intermediate layer 4 is printed on the back surface (upper surface) of the skin layer 3 with the embossed portion 31 by a silk screen printing machine. When the intermediate layer 4 has a multi-layer structure (for example, a structure having a surface layer (transparent layer) and a back layer (colored layer)), each layer is printed in order. In the design layer printing process, the design layer 5 is printed on the back surface (upper surface) of the intermediate layer 4 by a silk screen printing machine. When the design layer 5 has a multi-layer structure (for example, a structure in which a plurality of layers are laminated to form a wood grain pattern when viewed from the front side), each layer is printed in order.

[0032] (Function and effect) Next, the function and effect of the decorative sheet and its manufacturing method of this embodiment will be described. According to the decorative sheet 1 of this embodiment, a member for adjusting the light transmittance of the intermediate layer 4 and the design layer 5 (for example, the display control device or the dimming sheet of Patent Document 1) is unnecessary. For this reason, the layer configuration and the electrical configuration are simple. In addition, the design area 50 of the design layer 5 is arranged without gaps across the entire surface of the display area 30 when viewed from the front side. For this reason, there is no boundary itself between the design part (wood grain pattern part) and the gap in the design area 50. Therefore, when the backlight (light source unit 8) is turned off, it is possible to suppress the design area 50 of the design layer 5 from being displayed transparently on the surface of the skin layer 3.

[0033] Assume that the design layer 5 has lower light transmittance than the intermediate layer 4. In this case, the intermediate layer 4 is more likely to be seen through than the design layer 5. Therefore, when the backlight is turned off, the design area 50 (i.e., the wood grain pattern) of the design layer 5 is likely to be seen through the intermediate layer 4 and displayed on the surface of the skin layer 3.

[0034] In this regard, according to the decorative sheet 1 of the present embodiment, the design layer 5 has higher light transmittance than the intermediate layer 4. Therefore, the intermediate layer 4 is less likely to be seen through than the design layer 5. Thus, when the backlight is turned off, it is possible to suppress the design area 50 of the design layer 5 from being seen through the intermediate layer 4 and displayed on the surface of the skin layer 3.

[0035] The skin layer 3 has uneven portions 31 on its surface. Therefore, when the backlight is turned off, external light can be diffusely reflected between the unevenness of the uneven portions 31. Thus, it is possible to blur the boundary portion of the design area 50 of the design layer 5 (the portion where the shade of the wood grain of the wood grain pattern of the design area 50 is prominent). Therefore, it is possible to suppress the boundary portion of the design area 50 from being seen through and displayed on the surface of the skin layer 3. Note that the skin layer 3 is colorless and transparent and has higher light transmittance than the design layer 5 and the intermediate layer 4. Therefore, the uneven portions 31 become prominent mainly when the light is turned off.

[0036] The design layer 5 is a printed layer in which a wood grain pattern is formed by printing. Therefore, compared with the case where the design layer 5 is a coating film or the like, variations in the layer thickness (thickness in the front-back direction) of the design layer 5 can be suppressed. Also, it is possible to suppress the layer thickness of the design layer 5 from becoming excessively large.

[0037] The visible light transmittance of the intermediate layer 4 is 8%. That is, the visible light transmittance of the intermediate layer 4 is included in the range of 3% or more and 50% or less. Therefore, compared with the case where the visible light transmittance is less than 3%, the visibility of the wood grain pattern of the design area 50 when the backlight is on can be improved. Also, compared with the case where the visible light transmittance exceeds 50%, the visibility of the wood grain pattern of the design area 50 when the backlight is off can be reduced. Hereinafter, the method for measuring the visible light transmittance will be described. First, in a dark room without lighting, a sample is set on an LED light source (luminance 3000 cd / m 2 ). Next, at a position 1000 mm away from the measurement location (circular portion with a diameter of approximately 4 mm) of the sample, the luminous intensity I0 of the incident light and the luminous intensity I of the light passing through the sample are measured using a color luminance meter (manufactured by Konica Minolta, Inc., model number CS-160). Then, from the measurement results, the visible light transmittance τ (%) = (I / I0) × 100 is used to calculate the visible light transmittance.

[0038] The visible light transmittance of the design area 50 (measured by the above measurement method) is 55%. That is, the visible light transmittance of the design area 50 is included in the range of 5% or more and 90% or less. Therefore, compared with the case where the visible light transmittance is less than 5%, it is possible to suppress the design of the design area 50 from being displayed transparently on the surface of the skin layer 3 when the backlight is off. Also, compared with the case where the visible light transmittance exceeds 90%, the visibility of the design of the design area 50 when the backlight is on can be improved.

[0039] The decorative sheet 1 is disposed on the door trim 9. Therefore, by switching the backlight on and off, the design and texture of the door trim 9 can be given a two-sided property. Specifically, when the light source unit 8 is off, a leather-like design can be displayed on the door trim 9, and when the light source unit 8 is on, a wood grain-like design can be displayed.

[0040] The manufacturing method of the decorative sheet 1 includes an intermediate layer printing step and a design layer printing step. Therefore, for example, compared with the case where the intermediate layer 4 is a coating film or the like, variations in the layer thickness of the intermediate layer 4 can be suppressed. Also, it is possible to suppress the intermediate layer 4 from becoming excessively thick. The design layer 5 also has the same effect as the intermediate layer 4. Further, displacement in the layer direction between the three layers (the skin layer 3, the intermediate layer 4, and the design layer 5) can be suppressed.

[0041] <Second Embodiment> The difference between the decorative sheet and its manufacturing method of the present embodiment and those of the first embodiment is that a flexible layer is additionally arranged. Here, only the differences will be described.

[0042] FIG. 5 shows a partial cross-sectional view of the decorative sheet of the present embodiment in the front-back direction. Note that parts corresponding to those in FIG. 4 are denoted by the same reference numerals. As shown in FIG. 5, a flexible layer 6 is inserted between the design layer 5 and the light source portion 8. The flexible layer 6 is arranged on the back side of the design layer 5. The flexible layer 6 is made of a thermoplastic elastomer and has flexibility, light transmittance, and light diffusibility. Light from the light source 80 is diffused in the layer direction by the flexible layer 6. Therefore, the entire surface of the flexible layer 6 emits light.

[0043] The decorative sheet and its manufacturing method of the present embodiment and those of the first embodiment have the same operational effects with respect to the common parts of the configurations. The decorative sheet 1 of the present embodiment includes a flexible layer 6. Therefore, flexibility can be ensured when the user touches the door trim 9 (see FIG. 1). Also, the light from the light source 80 can be diffused in the layer direction. Therefore, when viewed from the front side, the light source portion 8 can emit light uniformly over the entire surface.

[0044] <Third Embodiment> The difference between the decorative sheet and its manufacturing method of the present embodiment and those of the second embodiment is that a base layer is additionally arranged. Here, only the differences will be described.

[0045] FIG. 6 shows a partial cross-sectional view of the front and back directions of the decorative sheet of the present embodiment. Note that parts corresponding to those in FIG. 5 are denoted by the same reference numerals. As shown in FIG. 6, a base layer 7 is inserted between the flexible layer 6 and the light source unit 8. The base layer 7 is disposed on the back side of the flexible layer 6. The base layer 7 is made of resin and has light transmissivity and flexibility.

[0046] The decorative sheet of the present embodiment and its manufacturing method, and the decorative sheet of the second embodiment and its manufacturing method have the same operational effects with respect to the common parts of the configuration. The decorative sheet 1 of the present embodiment includes a base layer 7. The base layer 7 is harder than the other layers (skin layer 3, intermediate layer 4, design layer 5, flexible layer 6). Therefore, the shape retention of the decorative sheet 1 can be ensured.

[0047] <Others> The embodiments of the decorative sheet and its manufacturing method of the present disclosure have been described above. However, the embodiments are not particularly limited to the above forms. It is also possible to implement in various modified forms and improved forms that can be carried out by those skilled in the art.

[0048] (Regarding the configuration) The configuration of the region other than the design region 50 of the design layer 5 is not particularly limited. The region other than the design region 50 may be disposed without gaps over the entire surface of the region other than the display region 30 as viewed from the front side. Further, gaps (voids, recesses, etc.) may be disposed in the region other than the design region 50.

[0049] The number of arrangements, positions, sizes, shapes, etc. of the display region 30 and the design region 50 are not particularly limited. The layer structure of each layer (skin layer 3, intermediate layer 4, design layer 5, flexible layer 6, base layer 7) is not particularly limited. It may be a single-layer structure or a multi-layer structure. Another layer may be interposed between two adjacent layers in the front-back direction (however, excluding the space between the flexible layer 6 and the base layer 7). Further, another layer may be disposed on the front side of the skin layer 3.

[0050] When viewed from the front side, the similarities and differences in the areas of the respective layers are not particularly limited. For example, when viewed from the front side, the intermediate layer 4 and the design layer 5 may be arranged in a part of the skin layer 3. Also, when viewed from the front side, the design layer 5 may be arranged in a part of the intermediate layer 4. Further, when viewed from the front side, the intermediate layer 4 may be arranged in a part of the design layer 5.

[0051] The position and the number of arrangements of the light sources 80 in the light source unit 8 are not particularly limited. Also, a single light source 80 may include a plurality of LEDs. In this case, the colors of the plurality of LEDs may be different from each other. For example, when a single light source 80 includes LEDs of three colors, red, green, and blue, in addition to red, green, and blue, white light can be irradiated.

[0052] The design of the design area 50 of the design layer 5 is not particularly limited. Preferably, it is better to have a design different from the design (such as color) of the intermediate layer 4. By doing so, it is easy to give a two-sided property to the design displayed in the display area 30 according to the lighting and extinguishing of the backlight.

[0053] Examples of the design of the design area 50 include a design including one or more selected from patterns (such as wood grain patterns, marble patterns, stone wall patterns, polka dot patterns, stripe patterns, lattice patterns), characters (alphabets, hiragana, katakana, Chinese characters, numbers, braille, etc.), figures (polygons, circles, etc.), symbols (buttons for operating equipment, icons indicating the state of equipment, etc.).

[0054] The color of the design displayed in the display area 30 of the skin layer 3 may be a single color or multiple colors. The color may be expressed in the display area 30 by one or more selected from each layer and the light source unit 8. The light transmittance of each layer is not particularly limited. It may be colored transparent, translucent, etc. The colors (hue, chroma, lightness) of each layer and the light source 80 are not particularly limited. The skin layer 3 does not have to have uneven portions such as the embossed portion 31. The surface of the skin layer 3 may be, for example, a smooth surface.

[0055] The luminance of the light source 80 is not particularly limited. The type, number of arrangements, and position of the light source 80 are not particularly limited. The light source 80 may be an organic EL sheet, an inorganic EL sheet, a phosphorescent sheet, or the like. Further, the light source unit 8 may include a light source 80 and a light guide plate (for example, an acrylic plate).

[0056] The type of the interior member on which the decorative sheet 1 is disposed is not particularly limited. For example, a door trim 9, a seat, an armrest, a floor, a ceiling, an instrument panel, a glove box, a steering wheel, a center console, a register, and the like can be mentioned. The surface of the interior member (the surface of the skin layer 3) may be flat or curved. The orientation of the interior member (the orientation in the front-back direction of the decorative sheet 1) is not particularly limited. That is, the front-back direction may be the vertical direction, the horizontal direction, or a direction intersecting the vertical direction and the horizontal direction. The decorative sheet 1 may be disposed on interior members of transportation equipment other than vehicles (motorcycles, ships, aircraft, etc.), buildings (buildings, houses, etc.). Further, the decorative sheet 1 may be disposed on an exterior member (such as the outer wall of a transportation equipment or a building).

[0057] (Regarding the material) The material of the skin layer 3 is not particularly limited. For example, synthetic leather, resin, elastomer, non-woven fabric, various fabrics (woven fabrics, knitted fabrics, etc.) can be mentioned. Specifically, as synthetic leather, resin, and elastomer, acrylic, polyethylene terephthalate, polycarbonate, polyvinyl chloride, silicone, epoxy, polyurethane, styrene-based thermoplastic elastomer, olefin-based thermoplastic elastomer, dynamically crosslinked thermoplastic elastomer, and the like can be mentioned. As non-woven fabric and various fabrics, polyester, polypropylene, nylon, cotton, and the like can be mentioned. The skin layer 3 may contain a colorant (such as colored polyethylene), a light diffusing agent (such as silicone, acrylic, titanium oxide), and a light absorber (such as titanium black, carbon black).

[0058] The material of the intermediate layer 4 is not particularly limited. For example, resins and elastomers such as acrylic, polyethylene terephthalate, polycarbonate, polyvinyl chloride, silicone, polyester, epoxy, polyurethane, styrene-based thermoplastic elastomer, olefin-based thermoplastic elastomer, dynamically crosslinked thermoplastic elastomer, etc. may be mentioned. The intermediate layer 4 may contain the aforementioned colorant, light diffusing agent, and light absorbing agent.

[0059] The material of the design layer 5 is not particularly limited. For example, resins and elastomers such as acrylic, polyethylene terephthalate, polycarbonate, polyvinyl chloride, silicone, polyester, epoxy, polyurethane, styrene-based thermoplastic elastomer, olefin-based thermoplastic elastomer, dynamically crosslinked thermoplastic elastomer, etc. may be mentioned. The design layer 5 may contain the aforementioned colorant, light diffusing agent, and light absorbing agent.

[0060] The material of the flexible layer 6 is not particularly limited. For example, elastomers such as styrene-based thermoplastic elastomer, olefin-based thermoplastic elastomer, dynamically crosslinked thermoplastic elastomer, etc., and foams such as polyurethane foam may be mentioned.

[0061] The material of the base layer 7 is not particularly limited. For example, resins and elastomers such as acrylic, polyethylene terephthalate, polycarbonate, polyvinyl chloride, silicone, polyester, epoxy, polyurethane, styrene-based thermoplastic elastomer, olefin-based thermoplastic elastomer, dynamically crosslinked thermoplastic elastomer, etc. may be mentioned.

[0062] When each layer has light diffusing properties, the method for imparting such light diffusing properties is not particularly limited. For example, a light diffusing agent (such as silicone, acrylic, titanium oxide, etc.) having a refractive index different from that of the base material may be dispersed in a transparent base material.

[0063] The method of laminating each layer is not particularly limited. Screen printing (such as silk screen printing), gravure printing, inkjet printing, flexographic printing, etc. may be used. Also, each layer may be laminated by adhesion, pressure bonding, sticking, vapor deposition, welding, coating, etc. A film-like other layer (for example, the design layer 5) may be adhered to the back surface of an arbitrary layer (for example, the intermediate layer 4). Further, another layer (for example, the intermediate layer 4) may be coated on the back surface of an arbitrary layer (for example, the skin layer 3).

Explanation of symbols

[0064] 1: Decorative sheet, 3: Skin layer, 30: Display area, 31: Textured portion, 4: Intermediate layer, 5: Design layer, 50: Design area, 6: Flexible layer, 7: Base layer, 8: Light source unit, 80: Light source, 9: Door trim (interior member)

Claims

1. An epidermal layer having light transmissibility, An intermediate layer disposed on the back side of the epidermal layer, A design layer disposed on the back side of the intermediate layer and having a design area with a predetermined design drawn thereon, A decorative sheet comprising: The epidermal layer has a display area in which the design is displayed by light irradiated from the back side to the design area, The decorative sheet is characterized in that the design area is arranged without gaps over the entire surface of the display area as viewed from the front side and has a higher light transmissibility than the intermediate layer.

2. The decorative sheet according to claim 1, wherein the visible light transmittance of the intermediate layer is 3% or more and 50% or less.

3. The decorative sheet according to claim 1, wherein the visible light transmittance of the design area is 5% or more and 90% or less.

4. The decorative sheet according to claim 1, which is disposed on an interior member of a vehicle.

5. An epidermal layer having light transmissibility, An intermediate layer disposed on the back side of the epidermal layer, A design layer disposed on the back side of the intermediate layer and having a design area with a predetermined design drawn thereon, A decorative sheet comprising: The epidermal layer has a display area in which the design is displayed by light irradiated from the back side to the design area, A method for manufacturing a decorative sheet, characterized in that the design area is arranged without gaps over the entire surface of the display area as viewed from the front side and has a higher light transmissibility than the intermediate layer, An intermediate layer printing step of printing the intermediate layer on the back surface of the epidermal layer, A design layer printing step of printing the design layer on the back surface of the intermediate layer, The method for manufacturing a decorative sheet, characterized by comprising the steps.

Images