Method for manufacturing decorative sheet and molded article

Abstract

The present application provides a decorative sheet in which pattern deterioration is less even when heat and pressure are applied during injection molding. The first pattern layer (22) and the second pattern layer (23) present a first mixed color and a second mixed color by including a plurality of interference pigments (221 to 223, 231 to 233) that emit a plurality of interference lights of different colors in the first direction in the first and second adhesives (229, 239), respectively. The optical function layer (24) has an optical function of changing the reflection characteristics of light. The first pattern layer (22) and the second pattern layer (23) are configured to display a pattern that can be visually recognized from the front (20a) side of the decorative sheet (20), and an image displayed on the back side (20b) can be visually recognized from the front side. The optical function layer (24) is configured to have the following reflection characteristics: increasing the ratio of at least one of the amount of visible light showing the pattern and the amount of visible light showing the image passing through the first pattern layer (22) and the second pattern layer (23) to the amount of visible light visually recognized by reflection on the front surface (20a).

Description

Technical Field

[0001] The present invention relates to a method for manufacturing a decorative sheet and a molded article, and more particularly to a method for manufacturing a decorative sheet for simultaneous forming and decoration and a molded article for simultaneous forming and decoration. Background Art

[0002] In the prior art, as described in Patent Document 1, for example, there is known a printed matter using a first-color adhesive including an interference pigment having a red color, a second-color adhesive including an interference pigment having a green color, and a third-color adhesive including an interference pigment having a blue color.

[0003] The printed matter described in Patent Document 1 is manufactured in the following manner: a first-color pattern layer is printed by a plurality of dot-like first-color adhesives, a second-color pattern layer is printed by a plurality of dot-like second-color adhesives, and a third-color pattern layer is printed by a plurality of dot-like third-color adhesives.

[0004] In the printed matter manufactured in this way, the red interference light reflected by the red interference pigment, the green interference light reflected by the green interference pigment, and the blue interference light reflected by the blue interference pigment are subjected to additive color mixing, thereby enabling a colorful color display.

[0005] In addition, Patent Document 1 discloses the following printed matter: in addition to the above-described first-color adhesive, second-color adhesive, and third-color adhesive, transmitted light of four primary printing inks of magenta (C), cyan (M), yellow (Y), and black (K) can also be used to visually confirm different images.

[0006] Prior Art Documents

[0007] Patent Documents

[0008] Patent Document 1: Japanese Patent No. 5725581 Gazette Summary of the Invention

[0009] Technical Problem to be Solved by the Invention

[0010] In the printed matter described in Patent Document 1, a colorful color display is achieved according to the overlapping state of the dot-like first-color adhesive, second-color adhesive, and third-color adhesive. When a pattern is formed on a decorative sheet for simultaneous forming and decoration by the printing method of Patent Document 1, due to the heat and pressure during injection molding in simultaneous forming and decoration, the overlapping state of the adhesives changes, and thus the pattern changes before and after molding.

[0011] The technical problem of the present invention is to provide a decorative sheet in which even when heat and pressure are applied during injection molding, the deterioration of the pattern after decorating the molded body is small.

[0012] Methods for solving the technical problem Hereinafter, as methods for solving the technical problem, multiple modes will be described. These modes can be arbitrarily combined as needed.

[0013] The decorative sheet according to one aspect of the present invention is a decorative sheet that is bonded to the back surface of a molded body having a three-dimensional shape or a two-dimensional shape and has its front surface facing the opposite side of the molded body in order to decorate the molded product. The decorative sheet includes a base film, a first pattern layer, a second pattern layer, an optical function layer, and an adhesive layer. The base film has a first main surface and a second main surface and is transmissive to visible light. The first pattern layer is provided on the second main surface side of the base film and exhibits a first mixed color by including a plurality of interference pigments in a first adhesive transmissive to visible light. The plurality of interference pigments emit a first set of interference lights of different colors from each other in a first direction from the back surface of the decorative sheet toward the front surface. The second pattern layer is provided on the second main surface side of the base film and exhibits a second mixed color different from the first mixed color by including a second set of interference pigments in a second adhesive transmissive to visible light. The second set of interference pigments emit interference lights of different colors from each other in the first direction. The optical function layer is provided at a position closer to the front surface of the decorative sheet than the first pattern layer and the second pattern layer and has an optical function of changing the reflection characteristic of light and being transmissive to visible light. The adhesive layer is provided on the back surface of the decorative sheet and is transmissive to visible light and capable of bonding to the molded body. The first pattern layer and the second pattern layer are configured such that by combining the first planar shape of the first pattern layer and the second planar shape of the second pattern layer, a pattern that can be visually recognized from the front side of the decorative sheet is represented. Moreover, the interference pigments included in the first pattern layer, the interference pigments included in the second pattern layer, the first adhesive, and the second adhesive are transmissive to incident light advancing in the first direction, so that an image displayed on the back side of the decorative sheet can be visually recognized from the front side of the decorative sheet. The optical function layer is configured to have the following reflection characteristic: increasing the ratio of at least one of the light amount of visible light representing the pattern and the light amount of visible light representing the image that has passed through the first pattern layer and the second pattern layer to the light amount of visible light that is visually recognized by being reflected on the front surface of the decorative sheet.

[0014] In the first pattern layer and the second pattern layer of the decorative sheet according to one aspect, in each of the first group and the second group, a plurality of interference pigments are mixed. Therefore, it is difficult for the first mixed color and the second mixed color formed by mixing the interference pigments to change due to heat and pressure during injection molding. As a result, changes in the patterns of the first mixed color and the second mixed color can be suppressed. In addition, through the optical functional layer, the amount of visible light that should pass through the first main surface of the base film from the first pattern layer and the second pattern layer and be visually recognized is greater than the amount of noise light such as reflected light on the first main surface. Therefore, the pattern becomes distinct, and the quality of the pattern can be improved.

[0015] Alternatively, the optical functional layer of the decorative sheet may be configured to have a hardness higher than that of the base film. It is difficult to damage the first pattern layer and the second pattern layer, and the pattern can be prevented from being soiled.

[0016] The decorative sheet according to another aspect of the present invention includes: a transfer layer that is transferred in such a manner that its back surface is bonded to a molded article having a three-dimensional shape or a two-dimensional shape and its front surface faces the opposite side of the molded article for decorating the molded article; and a base material film that supports the transfer layer in a peelable manner. The transfer layer has a protective layer, a first pattern layer, a second pattern layer, an optical functional layer, and an adhesive layer. The protective layer has a first main surface and a second main surface and allows visible light to pass through. The first pattern layer is provided on the second main surface side of the protective layer and exhibits a first mixed color by including a plurality of interference pigments in a first group in a first adhesive that allows visible light to pass through. The plurality of interference pigments in the first group emit different interference lights of a plurality of colors in a first direction from the back surface of the decorative sheet toward the front surface. The second pattern layer is provided on the second main surface side of the protective layer and exhibits a second mixed color different from the first mixed color by including interference pigments in a second group in a second adhesive that allows visible light to pass through. The interference pigments in the second group emit different interference lights of a plurality of colors in the first direction. The optical functional layer is provided at a position closer to the front surface of the decorative sheet than the first pattern layer and the second pattern layer and has an optical function of changing the reflection characteristics of light and allowing visible light to pass through. The adhesive layer is provided on the back surface of the decorative sheet and allows visible light to pass through and can be bonded to the molded article. The first pattern layer and the second pattern layer are configured to: combine the first planar shape of the first pattern layer and the second planar shape of the second pattern layer to display a pattern that can be visually recognized from the front side of the decorative sheet, and the interference pigments of the first pattern layer, the interference pigments of the second pattern layer, the first adhesive, and the second adhesive allow incident light advancing in the first direction to pass through, so that an image displayed on the back side of the transfer layer can be visually recognized from the front side of the transfer layer. The optical functional layer is configured to have the following reflection characteristics: increasing the ratio of at least one of the amount of visible light representing the pattern and the amount of visible light representing the image that has passed through the first pattern layer and the second pattern layer to the amount of visible light reflected on the front surface of the transfer layer and visually recognized.

[0017] In the first pattern layer and the second pattern layer of the decorative sheet in other aspects, in each of the first group and the second group, a plurality of interfering pigments are mixed. Therefore, the first mixed color and the second mixed color formed by mixing the interfering pigments are difficult to change due to the heat and pressure during injection molding. As a result, changes in the patterns of the first mixed color and the second mixed color can be suppressed. In addition, through the optical functional layer, the amount of visible light that should pass through the first main surface of the protective layer from the first pattern layer and the second pattern layer and be visually recognized is greater than the amount of light of noise such as reflected light on the first main surface. Therefore, the pattern becomes distinct and the quality of the pattern can be improved.

[0018] Alternatively, the optical functional layer of the decorative sheet may be configured to have an optical function of increasing the amount of transmitted light and decreasing the amount of reflected light. Since the reflected light is reduced, the amount of light reaching the first pattern layer and the second pattern layer increases. Therefore, the amount of interfering light emitted from the pattern formed by combining the first planar shape and the second planar shape increases. As a result, the pattern becomes distinct and the quality of the pattern can be improved.

[0019] Alternatively, in the above decorative sheet, the base film is disposed closer to the front surface than the first pattern layer and the second pattern layer, and the optical functional layer is formed on the first main surface of the base film. The optical functional layer formed in this way is located at the interface with the air layer. Therefore, it is easy to improve the function of increasing the transmitted light of the light passing through the first main surface of the base film and reducing the reflected light.

[0020] Alternatively, the optical functional layer of the decorative sheet may be configured to have an optical function of diffusing the reflected light. By diffusing the reflected light of the light incident from outside the decorative sheet, it is possible to suppress the difficulty of seeing the pattern and the image due to the reflected light. By diffusing the reflected light of the light advancing toward the front surface in the decorative sheet, it is possible to suppress the difficulty of seeing the image caused by the interfering pigment further reflecting the reflected light on the front surface of the decorative sheet.

[0021] The above decorative sheet may also include a transmittance adjustment layer, which is disposed closer to the back surface than the first pattern layer and the second pattern layer and adjusts the transmittance. In the decorative sheet configured in this way, through the transmittance adjustment layer, the amount of visible light transmitted from the back surface to the front surface can be adjusted to an appropriate amount, ensuring the visual confirmation of the displayed image. And when no image is displayed, the device for displaying the image located on the back side can be sufficiently hidden.

[0022] A method for manufacturing a molded article according to one aspect of the present invention includes: a step of disposing a decorative sheet in a cavity of a mold; and a step of adhering the decorative sheet to the molded article while injecting a molten material into the mold to form a translucent molded body. The decorative sheet includes a base film, a first pattern layer, a second pattern layer, an optical function layer, and an adhesive layer. The base film has a first main surface and a second main surface, and allows visible light to pass therethrough. The first pattern layer is disposed on the second main surface side of the base film, and exhibits a first mixed color by including a plurality of interference pigments in a first group in a first adhesive that allows visible light to pass therethrough. The plurality of interference pigments in the first group emit interference lights of a plurality of different colors in a first direction from the back surface of the decorative sheet toward the front surface. The second pattern layer is disposed on the second main surface side of the base film, and exhibits a second mixed color different from the first mixed color by including interference pigments in a second group in a second adhesive. The interference pigments in the second group emit interference lights of a plurality of different colors in the first direction. The optical function layer is disposed at a position closer to the front surface of the decorative sheet than the first pattern layer and the second pattern layer, and has an optical function of changing the reflection characteristics of light passing through the first main surface. The adhesive layer is disposed on the back surface of the decorative sheet, allows visible light to pass therethrough, and can adhere to the molded article. The first pattern layer and the second pattern layer are configured such that: the first planar shape of the first pattern layer and the second planar shape of the second pattern layer are combined to display a pattern that can be visually recognized from the front side, and the interference pigments of the first pattern layer, the interference pigments of the second pattern layer, the first adhesive, and the second adhesive allow incident light advancing in the first direction to pass therethrough, so that an image displayed on the back surface side can be visually recognized from the front side. The optical function layer is configured to have the following reflection characteristics: increasing the amount of visible light that represents the pattern formed by the first pattern layer and the second pattern layer and the amount of visible light that represents the image passing through the first pattern layer and the second pattern layer, and reducing the amount of visible light that is visually recognized due to reflection on the front surface.

[0023] In the method for manufacturing a molded article according to one aspect, in the first pattern layer and the second pattern layer, in each of the first group and the second group, a plurality of interference pigments are mixed. Therefore, the first mixed color and the second mixed color formed by mixing the interference pigments are less likely to change due to heat and pressure during injection molding. As a result, changes in the patterns of the first mixed color and the second mixed color can be suppressed. In addition, due to the optical function layer, the amount of visible light that should pass through the first main surface of the base film from the first pattern layer and the second pattern layer and be visually recognized is greater than the amount of noise light such as reflected light on the first main surface. Therefore, the pattern becomes distinct, and the quality of the pattern can be improved.

[0024] The manufacturing method of a molded article according to other aspects of the present invention includes: a step of disposing a decorative sheet in a cavity of a mold; and a step of transferring a transfer layer of the decorative sheet onto the molded article while injecting a molten material into the mold to form a translucent molded body. The transfer layer has a protective layer, a first pattern layer, a second pattern layer, an optical function layer, and an adhesive layer. The protective layer has a first main surface and a second main surface, and allows visible light to pass through. The first pattern layer is disposed on the second main surface side of the protective layer, and exhibits a first mixed color by including a plurality of interference pigments in a first group in a first adhesive that allows visible light to pass through. The plurality of interference pigments in the first group emit interference light of a plurality of different colors in a first direction from the back surface of the transfer layer toward the front surface of the transfer layer. The second pattern layer is disposed on the second main surface side of the protective layer, and exhibits a second mixed color different from the first mixed color by including a plurality of interference pigments in a second group in a second adhesive that allows visible light to pass through. The plurality of interference pigments in the second group emit interference light of a plurality of different colors in the first direction. The optical function layer is disposed at a position closer to the front surface than the first pattern layer and the second pattern layer, and has an optical function of changing the reflection characteristics of light and allowing visible light to pass through. The adhesive layer is disposed on the back surface of the decorative sheet, and allows visible light to pass through and can be bonded to the molded article. The first pattern layer and the second pattern layer are configured such that: the first planar shape of the first pattern layer and the second planar shape of the second pattern layer are combined to represent a pattern that can be visually confirmed from the front side, and the interference pigments of the first pattern layer, the interference pigments of the second pattern layer, the first adhesive, and the second adhesive allow incident light advancing in the first direction to pass through, so that an image displayed on the back side can be visually confirmed from the front side. The optical function layer is configured to have the following reflection characteristics: increasing the proportion of at least one of the light amount of visible light representing the pattern and the light amount of visible light representing the image that has passed through the first pattern layer and the second pattern layer with respect to the light amount of visible light reflected on the front surface and visually confirmed.

[0025] In the manufacturing method of the molded article in other aspects, in the first pattern layer and the second pattern layer, in each of the first group and the second group, a plurality of interference pigments are mixed. Therefore, the first mixed color and the second mixed color formed by mixing the interference pigments are difficult to change due to the heat and pressure during injection molding. As a result, changes in the patterns of the first mixed color and the second mixed color can be suppressed. In addition, due to the optical function layer, the light amount of visible light that should pass through the first main surface of the protective layer from the first pattern layer and the second pattern layer and be visually confirmed is greater than the light amount of noise such as reflected light on the first main surface. Therefore, the pattern becomes distinct, and the quality of the pattern can be improved.

[0026] Effects of the Invention

[0027] In the decorative sheet of the present invention, even when heat and pressure are applied during injection molding, deterioration of the pattern after decorating the molded body can be suppressed. The manufacturing method of the molded article of the present invention can provide a molded article with less deterioration of the pattern of the decorated molded body after injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a perspective view of a center console showing an image through a decorative sheet.

[0029] Figure 2 It is a perspective view of a center console not showing an image through a decorative sheet.

[0030] Figure 3 It is a schematic diagram for explaining an image display device displaying an image on a decorative sheet.

[0031] Figure 4 It is a schematic cross-sectional view showing an example of the configuration of the decorative sheet of the first embodiment.

[0032] Figure 5 It is a schematic diagram for explaining reflection and transmission of light in an interference pigment.

[0033] Figure 6 It is a schematic cross-sectional view of a decorative sheet for explaining the relationship between reflected light on the front surface of a base film and an interference pigment.

[0034] Figure 7 It is a schematic cross-sectional view of a decorative sheet for explaining the relationship between suppression of reflected light by an optical functional layer and an interference pigment.

[0035] Figure 8 It is a schematic cross-sectional view of a decorative sheet for explaining the relationship between reflected light on the front surface of a base film and an interference pigment.

[0036] Figure 9 It is a schematic cross-sectional view of a decorative sheet for explaining the relationship between suppression of reflected light by an optical functional layer and an interference pigment.

[0037] Figure 10 It is a schematic cross-sectional view of a decorative sheet for explaining the relationship between diffusion of reflected light by an optical functional layer and an interference pigment.

[0038] Figure 11 It is a schematic cross-sectional view for explaining setting a decorative sheet to a first mold.

[0039] Figure 12 It is a schematic cross-sectional view showing a first mold and a second mold that have been clamped.

[0040] Figure 13 It is a schematic cross-sectional view for explaining injection of molten material into a cavity.

[0041] Figure 14 It is a schematic cross-sectional view showing an example of the configuration of a molded product.

[0042] Figure 15 It is a schematic cross-sectional view showing an example of the configuration of the decorative sheet of the second embodiment.

[0043] Figure 16 For (a), it is a cross-sectional view showing the arrangement process of insert molding and simultaneous molding decoration. For (b), it is a cross-sectional view showing the mold clamping process. For (c), it is a cross-sectional view showing the injection process. For (d), it is a cross-sectional view showing the mold opening process.

[0044] Figure 17 It is a schematic cross-sectional view showing a modified example of the configuration of the decorative sheet.

[0045] Figure 18 It is a schematic cross-sectional view showing an example of the configuration of the decorative sheet related to the modified example G.

[0046] Figure 19 It is a schematic perspective view for explaining the decoration based on reflected light of the display device related to the modified example G.

[0047] Figure 20 It is a schematic perspective view for explaining the display based on transmitted light of the display device related to the modified example G.

[0048] Figure 21 It is a schematic diagram for explaining the color change caused by heat and pressure during injection molding. Detailed Description of the Invention

[0049] (First Embodiment)

[0050] (1) Overall Configuration

[0051] Figure 1 and Figure 2 show the decorative sheet 20 related to the first embodiment and the molded product having the decorative sheet 20, that is, the center console 1 of the automobile. The decorative sheet 20 with a wood grain texture is pasted on the exposed part of the center console 1. The decorative sheet 20 is one of the constituent elements of the center console 1 formed by injection molding. While injecting and molding the center console 1, the decorative sheet 20 is integrally molded with the molded body 2 of the center console 1 (refer to Figure 3 ). Here, the case where the decorative sheet 20 has a wood grain texture as a pattern is described, but the pattern of the decorative sheet 20 is not limited to the wood grain texture. The molded body 2 is formed of, for example, a transparent thermoplastic resin or a transparent thermoplastic elastomer.

[0052] Figure 3The outline of a configuration example of the display device 100 is shown. The display device 100 has a plurality of light sources 111 arranged in a matrix. The plurality of light sources 111 can use, for example, a plurality of LEDs.

[0053] The display device 100 is installed in the center console 1 of the vehicle. The screen 110 of the display device 100 is disposed below the decorative sheet 20 and the molded body 2. The screen 110 is configured such that the irradiated light passes through the molded body 2 and the decorative sheet 20. Accordingly, the driver of the vehicle can see the image of the screen 110 that has passed through the decorative sheet 20.

[0054] The time of 2:46 p.m. is displayed on the screen 110. In the screen 110, the characters "PM" and the portions of the numbers "02" and "46" indicating the time emit light. These characters and numbers are images. Here, the case where the image is a symbol such as a character or a number has been described, but the image can also be, for example, a decorative pattern or a signal, and is not limited to symbols or graphics for information transmission.

[0055] When the display on the screen 110 of the display device disappears, as Figure 2 shown, only the wood grain texture of the decorative sheet 20 can be visually confirmed.

[0056] Figure 4 Schematically shows a cross-sectional structure of the decorative sheet 20. Figure 4 The decorative sheet 20 shown has a base film 21, a first pattern layer 22, a second pattern layer 23, an optical function layer 24, a transmittance adjustment layer 25, and an adhesive layer 26.

[0057] The base film 21 is a thin film through which visible light passes. Here, the case where the base film 21 is transparent has been described, but the base film 21 can also be translucent. The base film 21 has a first main surface 21a and a second main surface 21b. In Figure 3 the decorative sheet 20 shown, the first main surface 21a of the base film 21 faces the outside of the center console 1 as a molded product, and the second main surface 21b faces the inside of the center console 1.

[0058] The first pattern layer 22 and the second pattern layer 23 are provided on the second main surface 21b side. In other words, the first pattern layer 22 and the second pattern layer 23 are disposed on the inner side of the center console 1 closer than the base film 21. The first pattern layer 22 and the second pattern layer 23 are adhered to the base film 21.

[0059] The first pattern layer 22 includes a red interference pigment 221 that emits red interference light, a green interference pigment 222 that emits green interference light, and a blue interference pigment 223 that emits blue interference light. In order to adhere these interference pigments 221 to 223 to the base film 21, the first pattern layer 22 has a first adhesive 229 through which visible light passes.

[0060] The second pattern layer 23 includes a red interference pigment 231 that emits red interference light, a green interference pigment 232 that emits green interference light, and a blue interference pigment 233 that emits blue interference light. In order to adhere these interference pigments 231 to 233 to the base film 21, the second pattern layer 23 has a second adhesive 239 that allows visible light to pass through.

[0061] Thus, in the first pattern layer 22, the first adhesive 229 that allows visible light to pass through contains three interference pigments 221 to 223 of the first group that emit interference light of three colors: red, green, and blue. Here, in the first pattern layer 22, a khaki color with a wood grain texture is presented by these three interference pigments 221 to 223 of the first group. The khaki color presented by the first pattern layer 22 is the first mixed color. The khaki color is expressed by additive mixing the light amounts of the interference light of the three interference pigments 221 to 223 of the first group in a first ratio.

[0062] In addition, in the second pattern layer 23, the second adhesive 239 that allows visible light to pass through contains three interference pigments 231 to 233 of the second group that emit interference light of three colors: red, green, and blue. Here, in the second pattern layer 23, a coffee color with a wood grain texture is presented by these three interference pigments 231 to 233 of the second group. The coffee color presented by the second pattern layer 23 is the second mixed color. The coffee color is expressed by additive mixing the light amounts of the interference light of the three interference pigments 231 to 233 of the second group in a second ratio.

[0063] Here, the red interference pigment 221 that emits red interference light used in the first pattern layer 22 and the red interference pigment 231 that emits red interference light used in the second pattern layer 23 are the same type of interference pigment. Similarly, the green interference pigments 222 and 232 are the same type of interference pigment, and the blue interference pigments 223 and 233 are the same type of interference pigment. Nevertheless, the first mixed color (khaki color) presented by the first pattern layer 22 and the second mixed color (coffee color) presented by the second pattern layer 23 are different from each other because the mixing ratios of the red interference pigment 221, the green interference pigment 222, and the blue interference pigment 223 are different from the mixing ratios of the red interference pigment 231, the green interference pigment 232, and the blue interference pigment 233.

[0064] It should be noted that here, the case where the first set of interference pigments 221-223 of the first pattern layer 22 and the second set of interference pigments 231-233 of the second pattern layer 23 are of the same type of interference pigment is described. However, they can also be of different types of interference pigments. For example, even if the interference pigments 221 and 231 emit the same red interference light, the frequencies of their interference light can be different, and pigments that emit the same red or different reds can also be used.

[0065] In addition, the types of colors of the first set of interference pigments included in the first pattern layer 22 can also be different from the types of colors of the second set of interference pigments included in the second pattern layer 23. For example, sometimes the first pattern layer 22 includes a red interference pigment 221 and a green interference pigment 222, and the second pattern layer 23 includes a green interference pigment 232 and a blue interference pigment 233. Moreover, the number of colors of the interference pigments included in the first pattern layer 22 can also be different from the number of colors of the interference pigments included in the second pattern layer 23. For example, sometimes the first pattern layer 22 includes a red interference pigment 221 of one color, and the second pattern layer 23 includes a red interference pigment 231 and a green interference pigment 232 of two colors. In other words, in this case, the red interference pigment 221 of one color forms the first set, and the red interference pigment 231 and the green interference pigment 232 of two colors form the second set.

[0066] When observing in Figure 4 the direction of the arrow Ar1, the first planar shape of the first pattern layer 22 is different from the second planar shape of the second pattern layer 23. The first planar shape of the first pattern layer 22 and the second planar shape of the second pattern layer 23 are combined to represent a pattern of wood grain texture.

[0067] Figure 5An example of the cross-sectional structure of the particles of the interference pigment 200 is schematically shown. The interference pigment 200 has a core portion 201 and a thin shell portion 202 covering the core portion 201. The core portion 201 and the shell portion 202 allow any visible light to pass through. The core portion 201 and the shell portion 202 are made of materials with different refractive indices. For example, the refractive index of the core portion 201 is less than the refractive index of the shell portion 202. Arrows Ar2 and Ar3 are incident lights incident on the shell portion 202 of the interference pigment 200. A part of the incident light shown by the arrow Ar3 enters the shell portion 202 and is reflected by the core portion 201 to become the reflected light Ar shown by the arrow Ar31. In addition, a part of the incident light shown by the arrow Ar2 is reflected on the front surface of the shell portion 202 to become the reflected light shown by the arrow Ar21. The reflected light shown by the arrow Ar21 interferes with the reflected light shown by the arrow Ar31 and enhances each other, so that the interference light of a specific wavelength is strongly visually confirmed. For example, if the thickness of the shell portion 202 is adjusted so that the wavelength enhanced by the interference becomes the wavelength of red, a red interference pigment can be obtained.

[0068] The visible light representing the image of the display screen 110 is also incident on the interference pigment 200. The visible light from the image incident on the interference pigment 200 is represented by Figure 5 the arrow Ar4. The visible light shown by the arrow Ar4 is incident on the interference pigment 200, passes through the interference pigment 200, and is emitted to the opposite side of the interference pigment 200. The visible light of the image that has passed through the interference pigment 200 is the transmitted light shown by the arrow Ar41.

[0069] Therefore, in the first pattern layer 22 and the second pattern layer 23, the interference pigments 221 to 223 included in the first pattern layer 22, the interference pigments 231 to 233 included in the second pattern layer 23, the first adhesive 229, and the second adhesive 239 allow the incident light advancing in the first direction to pass through. The decorative sheet 20 is configured such that even with the first pattern layer 22 and the second pattern layer 23, the image of the display screen 110 displayed on the back surface 20b side of the decorative sheet 20 can be visually confirmed from the front surface 20a side of the decorative sheet 20.

[0070] An optical functional layer 24 is provided at a position closer to the front surface 20a of the decorative sheet 20 than the first pattern layer 22 and the second pattern layer 23. The optical functional layer 24 has an optical function of changing the light reflection characteristics of the front surface 20a of the decorative sheet 20. Moreover, if the optical function is described in more detail, the optical functional layer 24 is configured to have the following reflection characteristics: by changing the reflection characteristics of the front surface 20a of the decorative sheet 20, the proportion of at least one of the amount of visible light representing the pattern and the amount of visible light representing the image of the screen 110 relative to the amount of visible light reflected from the front surface 20a and visually recognized by the user (the driver of the vehicle) is increased. Here, the amount of visible light representing the pattern is the amount of visible light representing the pattern combining the first planar shape of the first pattern layer 22 and the second planar shape of the second pattern layer 23. In addition, the amount of visible light representing the image of the screen 110 is the amount of visible light representing the image of the screen 110 passing through the first pattern layer 22 and the second pattern layer 23.

[0071] (1-1) Function of suppressing reflection on the front surface 20a of the decorative sheet 20

[0072] Figure 6 The cross-sectional structure of the decorative sheet 20 without the optical functional layer 24 is schematically shown. When the optical functional layer 24 is not provided, in Figure 6 the decorative sheet 20 shown, the front surface 20a of the decorative sheet 20 is the first main surface 21a of the base film 21. In the base film 21, for example, the first main surface 21a is a smooth and flat transparent resin film. In the smooth and flat first main surface 21a, for example, in the incident light shown by arrows Ar5 and Ar6, the reflected light shown by arrow Ar6 is generated. Due to the reflected light shown by arrow Ar6, the amount of light (the light shown by arrow Ar5) reaching the first pattern layer 22 and the second pattern layer 23 is, for example, about 95% of the amount of incident light shown by arrows Ar5 and Ar6. A part of the light shown by arrow Ar5 is reflected by the interference pigments 221 to 223 and 231 to 233. The light of arrow Ar7 reflected by the interference pigments 221 to 223 and 231 to 233 is the interference light visually recognized by the user (the driver).

[0073] Figure 7 The cross-sectional structure of the decorative sheet 20 provided with the optical functional layer 24 is schematically shown. In Figure 7 the optical functional layer 24 shown, it has an optical function of increasing the amount of transmitted light and decreasing the amount of reflected light on the front surface 20a of the decorative sheet 20. For example, reducing Figure 6 the reflected light shown by arrow Ar6, so that most of the light shown by arrow Ar6 reaches the interference pigments 221 to 223 and 231 to 233. As a result, compared with using Figure 6 the decorative sheet 20 shown,Figure 7 The decorative sheet 20 shown can increase the amount of interfering light shown by arrow Ar7. For example, when the amount of reflected light is reduced to about 1%, the amount of interfering light can be increased by about 4%. Such an optical functional layer 24 can be formed by applying the technology of existing antireflection films.

[0074] Figure 8 Schematically shows a cross-sectional structure of the decorative sheet 20 without the optical functional layer 24. When the optical functional layer 24 is not provided, in Figure 8 the decorative sheet 20 shown, the front surface 20a of the decorative sheet 20 is the first main surface 21a of the base film 21. On the smooth and flat first main surface 21a, for example, among the light irradiated by the screen 110 shown by arrows Ar8 and Ar9, reflected light shown by arrow Ar9 is generated. Through the reflected light shown by arrow Ar9, the amount of light (the light shown by arrow Ar9) reaching the first pattern layer 22 and the second pattern layer 23 is, for example, about 5% of the amount of incident light shown by arrows Ar8 and Ar9. A part of the light shown by arrow Ar9 is reflected by the interference pigments 221-223, 231-233. Being reflected by the interference pigments 221-223, 231-233, interfering light (the light shown by arrow Ar10) visually confirmed by the user (driver) is generated. Due to the light shown by arrow Ar8, the light shown by arrow Ar10 becomes noise of the image that is desired to be presented to the driver of the vehicle.

[0075] Figure 9 Schematically shows a cross-sectional structure of the decorative sheet 20 provided with the optical functional layer 24. Figure 9 The optical functional layer 24 shown has the same optical function as Figure 7 the optical functional layer 24 shown, which is to increase the amount of transmitted light and reduce the amount of reflected light on the front surface 20a of the decorative sheet 20. Compared with using Figure 8 the decorative sheet 20 shown, Figure 9 the decorative sheet 20 shown can increase the amount of light showing the image shown by arrow Ar9 and can reduce the unnecessary interfering light shown by arrow Ar10. Such an optical functional layer 24 can be formed by applying the technology of existing antireflection films.

[0076] (1-2) Function of diffusing the reflected light on the front surface 20a of the decorative sheet 20

[0077] Figure 10 Schematically shows a cross-sectional structure of the decorative sheet 20 provided with the optical functional layer 24. Figure 10 The optical functional layer 24 shown has the optical function of diffusing the reflected light. Compared with using Figure 8 the decorative sheet 20 shown, Figure 10The decorative sheet 20 shown can diffusely reflect the redundant interfering light indicated by the arrow Ar10. Such an optical functional layer 24 can be obtained, for example, by forming fine irregularities on the front surface 20a of the decorative sheet 20.

[0078] (1-3) Transmittance adjustment layer 25

[0079] The transmittance adjustment layer 25 is provided at a position closer to the back surface 20b of the decorative sheet 20 than the first pattern layer 22 and the second pattern layer 23. The transmittance adjustment layer 25 has a function of reducing the amount of transmitted light that passes through the transmittance adjustment layer 25 with respect to the amount of incident light incident on the transmittance adjustment layer 25. In other words, the transmittance adjustment layer 25 is a layer having a transmittance smaller than that of the base film 21. Therefore, the transmittance adjustment layer 25 is a so-called semi-transparent layer.

[0080] Even if the transmittance adjustment layer 25 is provided, the image displayed on the screen 110 of the display device 100 can be seen. However, by providing the transmittance adjustment layer 25, it is possible to suppress the image of the display device 100 itself in a state where no image is displayed that can be seen from the outside of the decorative sheet 20.

[0081] Here, the case where the transmittance adjustment layer 25 is provided has been described. However, the transmittance adjustment layer 25 is not a layer that must be provided for implementing the present invention, and the transmittance adjustment layer 25 can also be omitted as needed.

[0082] (2) Manufacturing method of the center console 1

[0083] A manufacturing method of the molded body 2 of the center console 1 as a molded product and the decorative sheet 20 will be described, and the manufacturing processes of other parts of the center console 1 will be omitted.

[0084] The decorative sheet 20 for the manufacturing method of the center console 1 of this first embodiment is preformed. When the deformation of the shape of the decorative sheet 20 before and after forming is small, the preforming can also be omitted.

[0085] In the first step of the manufacturing method of the molded product, as Figure 11 shown, for example, the decorative sheet 20 is automatically set on the first mold 310 by the robotic arm 330.

[0086] In the second step, as Figure 12 shown, the first mold 310 is closed with the second mold 320. In a state where the first mold 310 and the second mold 320 are closed, a cavity Cv formed by the first mold 310 and the second mold 320 is formed.

[0087] In the third step, as Figure 13As shown, a molten material 400 is injected into a cavity Cv to form a molded body 2 integrally formed with a decorative sheet 20. Examples of the molten material include a molten resin and a molten elastomer. The molten material 400 in the cavity Cv is cooled and solidified in a first mold 310 and a second mold 320, whereby Figure 14 the center console 1 shown is formed. The decorative sheet 20 covers a portion of the center console 1 as a molded article that is exposed to the external space OS. The display device 100 is disposed in the internal space IS of the center console 1.

[0088] During injection molding, heat and pressure are applied to the decorative sheet 20 by the molten material 400. However, the heat and pressure do not cause a change in the content ratio of the pigments 221 to 223 and 231 to 233 to interfere. Therefore, the khaki color (first mixed color) presented by the first pattern layer 22 and the coffee color (second mixed color) presented by the second pattern layer 23 of the decorative sheet 20 do not change.

[0089] (3) Detailed configuration

[0090] (3-1) Base film 21

[0091] The thickness of the base film 21 is selected, for example, from the range of 10 μm to 1000 μm. The base film 21 uses, for example, at least one of a light-transmitting resin and a light-transmitting elastomer. The resin-based base film 21 is selected, for example, from a resin film made of a polyester resin, a polyethylene terephthalate (PET) resin, an acrylic resin, a polycarbonate resin, a polybutylene terephthalate (PBT) resin, a triacetyl cellulose resin, a styrene resin, or an ABS resin, a multilayer film of an acrylic resin and an ABS resin, or a multilayer film of an acrylic resin and a polycarbonate resin. In addition, as the elastomer used for the base film 21, for example, a thermoplastic elastomer (TPE) can be used. Examples of the thermoplastic elastomer include an amide-based TPE (TPA), an ester-based TPE (TPC), an olefin-based TPE (TPO), a styrene-based TPE (TPS), and a polyurethane-based TPE (TPU). It should be noted that the base film 21 can also be a film in which a resin film and an elastomer film are laminated.

[0092] (3-2) First pattern layer 22 and second pattern layer 23

[0093] The thickness of the first pattern layer 22 and the second pattern layer 23 is selected, for example, from the range of 1 μm to 50 μm. The first pattern layer 22 and the second pattern layer 23 are formed on the base film 21, for example, by screen printing, offset printing, flexographic printing, gravure printing, or digital printing using inkjet or toner. The first adhesives 229 and the second adhesives 239 of the first pattern layer 22 and the second pattern layer 23 are composed of, for example, a vinyl chloride-vinyl acetate copolymer resin, an acrylic resin, a thermoplastic polyurethane resin, or a polyester resin.

[0094] (3-3)Optical functional layer 24

[0095] The optical functional layer 24 is a layer in which reflection is suppressed by a dielectric, for example, when formed using an antireflection film forming technique. As the dielectric, for example, a metal oxide or a fluoride can be used. The optical functional layer 24 can also be a multilayer film formed by laminating two or more dielectrics having different refractive indices.

[0096] The optical functional layer 24 is preferably formed on a hard coat that is higher in height than the base film 21. As the material of the hard coat in this case, for example, UV curable and ionizing radiation curable resins such as polyester acrylate and polyurethane acrylate, or thermosetting resins such as acrylic and polyurethane can be cited. The hard coat is preferably formed to exhibit a hardness of HB or more in the pencil hardness test (load 750 g) according to JIS K5600-5-4.

[0097] (3-4)Transmittance adjustment layer 25

[0098] The transmittance adjustment layer 25 is, for example, a layer printed with ink in which a transparent adhesive resin is colored with a light-shielding pigment or dye. The transmittance adjustment layer 25 is, for example, a layer printed with black ink. Alternatively, the transmittance adjustment layer 25 is, for example, a metal thin film layer formed of a metal so as to transmit light. Such a metal thin film layer is formed, for example, by vapor-depositing a metal.

[0099] (3-5)Adhesive layer 26

[0100] The adhesive layer 26 is a layer for bonding the decorative sheet 20 to the molded body 2 and allows visible light to pass through. The adhesive layer 26 is set to have a thickness in the range of 1 μm to 50 μm, for example.

[0101] The adhesive layer 26 is formed mainly of, for example, an acrylic resin, a polyurethane resin, a polyester resin, a polyvinyl acetate resin, a vinyl chloride resin, or a vinyl chloride-vinyl acetate copolymer. As a secondary material, for example, a polymer material for improving the adhesive strength can also be included. Here, the main material means a material that accounts for half of the total weight of the material. The adhesive layer 26 is formed, for example, by coating a resin dissolved in a solvent and drying it, or by coating a resin melted by heat and curing it. Techniques for coating the resin include, for example, coating techniques and printing techniques. As a coating technique, for example, there is a knife coating method. As a printing technique, for example, there are letterpress printing and offset printing.

[0102] (Second Embodiment)

[0103] (4)Overall configuration

[0104] In the above first embodiment, the case where the decorative sheet 20 is used to manufacture the center console 1 has been described. However, instead of the decorative sheet 20, the decorative sheet 60 shown in Figure 15 may be used to manufacture the center console 1 as a molded product.

[0105] In the overall configuration of the center console 1 as a molded product of the second embodiment, only the decorative sheet 20 needs to be replaced with the transfer layer 70 of the decorative sheet 60. Therefore, the description thereof is omitted here.

[0106] A display device 100 is installed on the center console 1 of the vehicle on which the transfer layer 70 is transferred. The screen 110 of the display device 100 is disposed below the transfer layer 70 and the molded body 2 transferred to the center console 1. In the case where the decorative sheet 20 is replaced with the transfer layer 70, it is also configured such that the driver of the vehicle can see the image of the screen 110 through the transfer layer 70. The pattern of the transfer layer 70 may also be, for example, a wood grain texture like the decorative sheet 20.

[0107] Figure 15 The cross-sectional structure of the decorative sheet 60 is schematically shown. Figure 15 The decorative sheet 60 shown in has a base material film 69, a protective layer 61, a first pattern layer 22, a second pattern layer 23, an optical function layer 24, a transmittance adjustment layer 25, and an adhesive layer 26. The protective layer 61, the first pattern layer 22, the second pattern layer 23, the optical function layer 24, the transmittance adjustment layer 25, and the adhesive layer 26 among them constitute the transfer layer 70. The transfer layer 70 is a layer transferred to the molded body 2 and is a layer peeled off from the base material film 69 after transfer. It should be noted that a release layer for easily peeling the transfer layer 70 from the base material film 69 may also be provided between the base material film 69 and the transfer layer 70.

[0108] The protective layer 61 is a layer through which visible light passes. Here, the case where the protective layer 61 is transparent has been described. However, the protective layer 61 may also be translucent. The protective layer 61 has a first main surface 61a and a second main surface 61b. In the transfer layer 70, the first main surface 61a of the protective layer 61 faces the outside of the center console 1 as a molded product, and the second main surface 61b faces the inside of the center console 1.

[0109] The first pattern layer 22 and the second pattern layer 23 of the decorative sheet 60 may be configured in the same manner as the first pattern layer 22 and the second pattern layer 23 of the decorative sheet 20 in the first embodiment. Therefore, the description of the first pattern layer 22 and the second pattern layer 23 of the decorative sheet 60 is omitted here.

[0110] The optical functional layer 24 is disposed at a position closer to the front surface 70a of the transfer layer 70 than the protective layer 61. It should be noted that the optical functional layer 24 may also be configured to serve as the protective layer 61. The layer that serves as both the optical functional layer 24 and the protective layer 61 may have, for example, the same configuration as the layer in which the optical functional layer 24 is provided on the hard coat layer in the first embodiment. The optical functional layer 24 has an optical function of changing the light reflection characteristics of the first main surface 61a of the protective layer 61. If the optical function is described in more detail, the optical functional layer 24 is configured to have the following reflection characteristics: by changing the reflection characteristics of the first main surface 61a of the protective layer 61, the proportion of at least one of the amount of visible light representing the pattern and the amount of visible light representing the image of the screen 110 relative to the amount of visible light reflected from the front surface 70a of the transfer layer 70 and visually recognized by the user (the driver of the vehicle) is increased.

[0111] Regarding the effect when the optical functional layer 24 has the function of suppressing reflection on the front surface 70a of the transfer layer 70, it has the same effect as when Figures 6 to 9 described above, when the optical functional layer 24 has the function of suppressing reflection on the front surface 20a of the decorative sheet 20. If the effect of the function of suppressing reflection on the front surface 70a of the transfer layer 70 is described, the same content as the description of the effect of the function of suppressing reflection on the front surface 20a of the decorative sheet 20 will be repeated. Therefore, the description of the function of the optical functional layer 24 for suppressing reflection on the transfer layer 70 is omitted.

[0112] Regarding the effect when the optical functional layer 24 has the function of diffusing the reflected light on the front surface 70a of the transfer layer 70, it has the same effect as when Figure 10 described above, when the optical functional layer 24 has the function of diffusing the reflected light on the front surface 20a of the decorative sheet 20. If the effect of the function of diffusing the reflected light on the front surface 70a of the transfer layer 70 is described, the same content as the description of the effect of the function of diffusing the reflected light on the front surface 20a of the decorative sheet 20 will be repeated. Therefore, the description of the function of the optical functional layer 24 for diffusing the reflected light on the transfer layer 70 is omitted.

[0113] The transmittance adjustment layer 25 of the decorative sheet 60 may be configured in the same manner as the transmittance adjustment layer 25 of the decorative sheet 20 in the first embodiment. Therefore, the description of the transmittance adjustment layer 25 of the decorative sheet 60 is omitted here.

[0114] (5) Manufacturing method of the center console 1

[0115] Using Figure 16 of (a) to Figure 16 of (d), an example of the manufacturing method of the center console 1 as a molded product is described. In Figure 16In the manufacturing process shown in (a), a decorative sheet 60 having a transfer layer 70 (see Figure 15 ) is disposed on the inner surface 361 of the first mold 360. The decorative sheet 60 is fixed by a clamp 362. The component 2a is disposed in the second mold 370. The component 2a is adsorbed and fixed in the second mold 370.

[0116] Next, Figure 16 the mold clamping process shown in (b) is performed. In the mold clamping process, a cavity Cv is formed to accommodate the decorative sheet 60 disposed in the first mold 360 and the component 2a disposed on the inner surface of the second mold 370.

[0117] Figure 16 (c) shows the injection process. In the injection process, the molten material 400 is injected through the gate 372 into the cavity Cv formed between the first mold 360 and the second mold 370. The molten material 400 adheres to the respective front surfaces of the component 2a and the transfer layer 70 of the decorative sheet 60 (see Figure 16 (a)). The adhesive layer (not shown) of the component 2a and the adhesive layer 26 of the transfer layer 70 (see Figure 15 ) exert an adhesive function by the heat and pressure directly transferred by the molten material 400. When the molten material 400 fills the cavity Cv and stops flowing, the molten material 400 is cooled via the first mold 360 and the second mold 370. By cooling and solidifying the molten material 400, the molded body 2 is formed.

[0118] Next, as shown in Figure 16 (d), the first mold 360 and the second mold 370 are opened. At this time, the transfer layer 70 is peeled off from the decorative sheet 60, the center console 1 as the molded product remains in the second mold 370, and the base film 69 of the decorative sheet 60 remains in the first mold 360. The center console 1 is detached from the second mold 370, for example, by a demolding rod 373 protruding from the second mold 370, and is held and taken out by an incoming pick-up robot (not shown).

[0119] During injection molding, heat and pressure are applied to the transfer layer 70 of the decorative sheet 60 by the molten material 400. However, since the heat and pressure do not cause a change in the content ratio of the pigments 221 to 223, 231 to 233, the first mixed color (for example, khaki) presented by the first pattern layer 22 and the second mixed color (for example, coffee color) presented by the second pattern layer 23 of the transfer layer 70 do not change.

[0120] (6) Variation

[0121] (6-1) Variation A

[0122] The above decorative sheet 20 or transfer layer 70 may also be provided with an interference light noise reduction layer, which is disposed at a position closer to the front surface 20a of the decorative sheet 20 or the front surface 70a of the transfer layer 70 than the first pattern layer 22 and the second pattern layer 23, and includes interference light noise reduction ink that reduces the noise of interference light emitted from the first pattern layer 22 and the second pattern layer 23. The interference light noise reduction ink is ink that absorbs light of wavelengths other than the wavelength of the interference light. Such interference light noise reduction ink is configured to include, for example, absorption pigments. For example, when it is desired to make the blue color develop more vividly, a small amount of blue absorption pigment is added to the interference light noise reduction layer. As the blue absorption pigment, there are, for example, synthetic pigments such as phthalocyanine blue. In the decorative sheet or transfer layer configured in this way, the noise increased due to heat and pressure during injection molding can be reduced by the interference light noise reduction layer, and the change of the pattern caused by injection molding can be suppressed.

[0123] (6-2) Variant B

[0124] In the above first embodiment and second embodiment, the case where the mixed color presented by the first pattern layer 22 and the second pattern layer 23 is formed only by the interference pigments 221 to 223, 231 to 233 has been described. However, pigments other than the interference pigments 221 to 223, 231 to 233 may be added to the mixed color presented by the first pattern layer 22 and the second pattern layer 23. For example, a silver pigment may be added to the first pattern layer 22 and the second pattern layer 23. As the silver pigment, there is, for example, thin aluminum flakes.

[0125] (6-3) Variant C

[0126] In the above first embodiment, the case where the base film 21 is disposed at a position closer to the front surface 20a of the decorative sheet 20 than the first pattern layer 22 and the second pattern layer 23 has been described. However, as Figure 17 shown, the base film 21 may also be disposed at a position closer to the back surface 20b of the decorative sheet 20 than the first pattern layer 22 and the second pattern layer 23. In this case, in the optical function layer 24, an optical function portion 24a that exhibits an optical function is formed on top of a relatively thick protective layer portion 24b through which visible light passes. The protective layer portion 24b may be configured in the same way as the above-mentioned hard coat, for example. The thickness of the protective layer portion 24b is, for example, 0.1 μm to 1 μm.

[0127] (6-4) Variant D

[0128] In the above first embodiment and second embodiment, the case where the first pattern layer 22 and the second pattern layer 23 do not overlap has been described. However, as Figure 17 shown, the first pattern layer 22 and the second pattern layer 23 may also be arranged such that a part of one overlaps a part or all of the other.

[0129] In Figure 17 it, the first range ra1 is the range where interfering light is emitted from the first pattern layer 22, the second range ra2 is the range where interfering light is emitted from the second pattern layer 23, and the third range ra3 is the range where interfering light from both the first pattern layer 22 and the second pattern layer 23 is emitted. The first range ra1 appears as a first mixed color presented by the first pattern layer 22. The second range ra2 appears as a second mixed color presented by the second pattern layer 23. The third range ra3 appears as a third mixed color formed by additive mixing of the first mixed color of the first pattern layer 22 and the second mixed color of the second pattern layer 23. Among these three colors, namely, the first mixed color of the first range ra1, the second mixed color of the second range ra2, and the third mixed color of the third range ra3, the third mixed color is the most vivid color. The third mixed color is a color closer to white than the first mixed color and the second mixed color.

[0130] (6-5) Modification E

[0131] In the above first embodiment and second embodiment, the case where the optical functional layer 24 having the optical function of diffusing reflected light is realized by unevenness has been described. However, the optical functional layer 24 having such a function can also be realized, for example, by dispersing particles for diffusing reflected light in the optical functional layer 24, and is not limited to the configuration of the optical functional layer 24 in the above embodiments.

[0132] (6-6) Modification F

[0133] In the above first embodiment and second embodiment, the case where one optical functional layer 24 has one of the optical functions of diffusing reflected light or increasing the amount of transmitted light and decreasing the amount of reflected light has been described. However, it is also possible that one optical functional layer 24 has both of the aforementioned two optical functions. In order to obtain the optical functional layer 24 having both of the aforementioned two optical functions, for example, after forming a hard coat with unevenness, an antireflection film may be formed on the front surface of the hard coat with unevenness. It should be noted that, in other words, the antireflection film may also be referred to as an antiglare layer.

[0134] (6-7) Modification G

[0135] In the above first embodiment and second embodiment, the case where the display of the screen 110 of the display device 100 is performed by transmitted light passing from the back surfaces 20b, 70b sides of the decorative sheet 20 or the transfer layer 70 to the front surfaces 20a, 70a sides has been described. However, it may also be configured to perform the display of the screen 110 and displays other than the screen 110 by transmitted light.

[0136] Using Figure 18 、 Figure 19 andFigure 20 A description is given of Modification G. The decorative sheet 20 according to Modification G is different from the decorative sheet 20 of the first embodiment in that it further includes a mask layer 27. The mask layer 27 is a layer for shielding the transmitted light of a predetermined portion. In the mask layer 27, the light transmittance of the predetermined portion is smaller than that of the transmittance adjustment layer 25. The mask layer 27 is disposed at a position closer to the back surface 20b of the decorative sheet 20 than the first pattern layer 22 and the second pattern layer 23. It should be noted that, in the decorative sheet 20 shown, the mask layer 27 is disposed at a position closer to the back surface 20b than the transmittance adjustment layer 25. However, the mask layer 27 may also be disposed at a position closer to the front surface 20a than the transmittance adjustment layer 25.

[0137] As Figure 18 shown, the mask layer 27 has an opening 27a corresponding to the screen 110 of the display device 100 and an icon portion 27b. The opening 27a and the icon portion 27b are transparent portions through which light passes.

[0138] For example, a light-transmissive touch sensor (not shown) is overlapped and disposed on the decorative sheet 20. It is configured such that when touching above the icon portion 27b, the touch sensor can be used to perform operations related to the displayed icon.

[0139] When light is not irradiated from the screen 110 of the display device 100, as Figure 20 shown, the user (the driver of the vehicle) can visually confirm the wood grain texture of the decorative sheet 20.

[0140] When light is irradiated from the entire screen 110 of the display device 100, as Figure 19 shown, the wood grain texture, the display of the opening 27a, and the icon portion 27b can be visually confirmed. The region where the wood grain texture is visually confirmed at this time is the region of the mask layer 27 except for the opening 27a and the icon portion 27b. The icon portion 27b includes a triangular icon, an icon of two lines, and an icon in the shape of a combination of a circle and a straight line.

[0141] In the icon portion 27b, information related to the icon can be transmitted through the display of the screen 110. For example, when touching the triangular icon in the icon portion 27b, the music player (not shown) becomes the playing state through the touch sensor, and when touching the triangular icon portion 27b again, the music player stops. If the portion corresponding to the triangular icon portion 27b of the screen 110 emits green or red light, the driver of the vehicle can see a green triangle glowing in the wood grain texture. For example, the driver can recognize that the music player is in the stopped state through the green triangular icon. When the driver hopes to make the music player enter the playing state, the driver only needs to touch the green triangular icon. If the music player enters the playing state, the triangular icon can be made to emit red light using the screen 110 for example.

[0142] Thus, not only through the display of the screen 110, but also the decorative sheet 20 can be used to present the information to be transmitted. Here, the case where the icon portion 27b emits light using the screen 110 has been described. However, for example, a light-emitting unit other than the screen 110 such as an LED can also be used to make the icon portion 27b emit light.

[0143] It should be noted that the mask layer 27 can also be provided on the transfer layer 70 to make the transfer layer 70 have the same function as the mask layer 27 of the above-mentioned decorative sheet 20.

[0144] (6-8) Variant H

[0145] In the above first embodiment and second embodiment, the case of using two pattern layers of the first pattern layer 22 and the second pattern layer 23 has been described. However, the number of pattern layers that can be used is not limited to two, and three or more pattern layers can also be used. For example, in order to improve the quality of the pattern such as multi-color sense and the depth of the pattern representation, a third pattern layer presenting a third mixed color different from the first pattern layer 22 and the second pattern layer 23 can also be added.

[0146] (7) Features

[0147] (7-1)

[0148] In the first pattern layer 22 of the decorative sheets 20 and 60, a variety of color interference pigments 221 to 223 are mixed. The mutual ratio and positional relationship of these interference pigments 221 to 223 are fixed by the first adhesive 229. Therefore, when performing the simultaneous forming and decoration using the decorative sheets 20 and 60, even if the transfer layers 70 of the decorative sheet 20 and the decorative sheet 60 receive heat and pressure from the molten material 400 forming the formed body 2, their ratio and positional relationship can be suppressed from changing.

[0149] Consider the following situation: for example Figure 20As shown, the red interference pigment 241 is fixed in dots by an adhesive 901, and the green interference pigment 242 is adhered in dots by another adhesive 902, thus forming a pixel 910. In this case, due to the heat and pressure during injection molding, as in the case of pixel 920, when one of the dot-shaped adhesives 901 and 902 deviates, since the areas and light amounts of red and green change, the color of pixel 910 changes. Such color changes are difficult to occur in the khaki (first mixed color) and coffee color (second mixed color) of the first pattern layer 22 and the second pattern layer 23.

[0150] (7-2)

[0151] As described using Figure 21 and Figure 6 When the amount of transmitted light of the first main surface 21a of the base film 21 is increased and the amount of reflected light is decreased by the optical functional layer 24, the quality of the pattern exhibited by the first pattern layer 22 and the second pattern layer 23 can be improved. Such an effect can be obtained because the amount of light reaching the interference pigments 221 to 223 of the first pattern layer 22 and the interference pigments 231 to 233 of the second pattern layer 23 increases. Therefore, when a first adhesive 229 contains interference pigments 221 to 223 of multiple colors and a second adhesive 239 contains interference pigments 231 to 233 of multiple colors, the improvement effect of color development due to the increased light amount becomes larger.

[0152] In addition, as described using Figure 7 and Figure 8 When there is no optical functional layer 24, a part of the light used for displaying an image in the display device 100 is reflected by the first main surface 21a of the base film 21. When interference light is emitted from the interference pigments 221 to 223 and 231 to 233 due to such reflected light, such interference light becomes noise for the image of the display device 100. When there is an optical functional layer 24 that increases the amount of transmitted light on the first main surface 21a and decreases the amount of reflected light, the reflection of the light used for displaying an image by the first main surface 21a of the base film 21 can be suppressed. As a result, the generation of unnecessary interference light can be reduced and the noise with respect to the image can be reduced, and the image can be easily observed.

[0153] (7-3)

[0154] As described using Figure 9 and Figure 8 Figure 10 When there is no optical functional layer 24, a part of the light used for displaying an image in the display device 100 is reflected by the first main surface 21a of the base film 21.

[0155] When there is an optical functional layer 24 that diffuses reflected light through the first main surface 21a, it is possible to suppress light for displaying an image from being reflected by the first main surface 21a of the base film 21 and to provide a large amount of light to the local interference pigments 221 to 223, 231 to 233. As a result, unnecessary disturbing light can be weakened and noise with respect to the image can be reduced, and the image can be easily observed.

[0156] (7-4)

[0157] When the transmittance adjustment layer 25 is provided, the amount of visible light transmitted from the back surface 20b to the front surface 20a of the decorative sheet 20 or the amount of visible light transmitted from the back surface 70b to the front surface 70a of the transfer layer 70 can be adjusted to an appropriate amount. As a result, light for displaying an image can pass through the transmittance adjustment layer 25, and visual confirmation of the image displayed on the display device 100 can be ensured.

[0158] In addition, when the display device 100 does not display an image, the image of the device for displaying an image located on the back surface 20b side of the decorative sheet 20 or the back surface 70b side of the transfer layer 70 can be sufficiently hidden.

[0159] (7-5)

[0160] The optical functional layer 24 is preferably formed as a hard coat having a higher hardness than the base film 21. The first pattern layer 22 and the second pattern layer 23 are disposed at a position closer to the back surface 20b of the decorative sheet 20 than the optical functional layer 24. Therefore, due to the high-hardness optical functional layer 24, the first pattern layer 22 and the second pattern layer 23 are hardly soiled, and a beautiful pattern can be maintained for a long time.

[0161] As described above, embodiments and modification examples of the present invention have been described. However, the present invention is not limited to the above-described embodiments and modification examples, and various changes can be made without departing from the spirit of the invention. In particular, the plurality of embodiments and modification examples described in this specification can be arbitrarily combined as needed.

[0162] Explanation of reference numerals

[0163] 1 center console (example of a molded product); 2 molded body; 20, 60 decorative sheet; 21 base film; 22 first pattern layer; 23 second pattern layer; 24 optical functional layer; 25 transmittance adjustment layer; 70 transfer layer; 110 screen; 221 to 223, 231 to 233 interference pigments; 229 first adhesive; 239 second adhesive.

Claims

1. A decorative sheet for decorating a shaped article having a three-dimensional shape or a two-dimensional shape and being translucent, wherein the back surface of the decorative sheet is bonded to the shaped article and the front surface of the decorative sheet faces the opposite side of the shaped article, and the decorative sheet includes: A base film having a first main surface close to the front surface and a second main surface close to the back surface, and allowing visible light to pass through; A first pattern layer provided on the second main surface side of the base film, and presenting a first mixed color by including a plurality of interference pigments in a first group in a first adhesive allowing visible light to pass through, and the plurality of interference pigments in the first group emit interference lights of a plurality of different colors in a first direction from the back surface toward the front surface; A second pattern layer provided on the second main surface side of the base film, and presenting a second mixed color different from the first mixed color by including a plurality of interference pigments in a second group in a second adhesive allowing visible light to pass through, and the plurality of interference pigments in the second group emit interference lights of a plurality of different colors in the first direction; An optical function layer provided on the side of the base film close to the front surface, and having an optical function of changing the reflection characteristic of light and allowing visible light to pass through; And An adhesive layer provided on the back surface, allowing visible light to pass through and capable of bonding to the shaped article, The first pattern layer and the second pattern layer are configured to: combine the first planar shape of the first pattern layer and the second planar shape of the second pattern layer to present a pattern that can be visually confirmed from the front side, and the interference pigments in the first group, the interference pigments in the second group, the first adhesive, and the second adhesive allow incident light advancing in the first direction to pass through, so that an image displayed on the back side can be visually confirmed from the front side; The optical function layer is configured to have the following reflection characteristic: increasing the proportion of at least one of the light amount of visible light presenting the pattern and the light amount of visible light presenting the image passing through the first pattern layer and the second pattern layer with respect to the light amount of visible light visually confirmed by reflection on the front surface.

2. The decorative sheet according to claim 1, wherein The optical function layer has a hardness higher than that of the base film.

3. A decorative sheet includes: a transfer layer for decorating a shaped article having a three-dimensional shape or a two-dimensional shape and being translucent, and the transfer layer is transferred in such a manner that the back surface of the transfer layer is bonded to the shaped article and the front surface of the transfer layer faces the opposite side of the shaped article; and a base material film supporting the transfer layer in a peelable manner, wherein The transfer layer has: A protective layer having a first main surface close to the front surface and a second main surface close to the back surface, and allowing visible light to pass through; A first pattern layer provided on the second main surface side of the protective layer, and presenting a first mixed color by including a plurality of interference pigments in a first group in a first adhesive allowing visible light to pass through, and the plurality of interference pigments in the first group emit interference lights of a plurality of different colors in a first direction from the back surface toward the front surface; A second pattern layer, disposed on the second major surface side of the protective layer, and presenting a second mixed color different from the first mixed color by including a plurality of interference pigments in a second group in a second adhesive that allows visible light to pass through, the plurality of interference pigments in the second group emitting interference light of a plurality of different colors in the first direction respectively; An optical function layer, disposed on a side closer to the front surface of the transfer layer than the protective layer, and having an optical function of changing the reflection characteristics of light and allowing visible light to pass through; And An adhesive layer, disposed on the back surface, allowing visible light to pass through and being capable of adhering to the molded body, The first pattern layer and the second pattern layer are configured to: combine the first planar shape of the first pattern layer and the second planar shape of the second pattern layer to display a pattern that can be visually recognized from the front side, and the interference pigments in the first group, the interference pigments in the second group, the first adhesive, and the second adhesive allow incident light advancing in the first direction to pass through, so that an image displayed on the back side can be visually recognized from the front side; The optical function layer is configured to have the following reflection characteristics: increasing the proportion of at least one of the light amount of visible light representing the pattern and the light amount of visible light representing the image that has passed through the first pattern layer and the second pattern layer with respect to the light amount of visible light visually recognized by reflection on the front surface.

4. The decorative sheet according to any one of claims 1 to 3, wherein The optical function layer has an optical function of increasing the light amount of transmitted light and decreasing the light amount of reflected light on the front surface.

5. The decorative sheet according to any one of claims 1 to 3, wherein The optical function layer has an optical function of diffusing reflected light.

6. The decorative sheet according to any one of claims 1 to 3, wherein The decorative sheet includes a transmittance adjustment layer, the transmittance adjustment layer is disposed at a position closer to the back surface than the first pattern layer and the second pattern layer, and adjusts the transmittance.

7. A method for manufacturing a molded article, comprising: A step of disposing a decorative sheet in a cavity of a mold; And A step of adhering the decorative sheet to the molded body while injecting a molten material into the mold to form a light-transmissive molded body, The decorative sheet has: A base film, having a first major surface close to the front surface of the decorative sheet and a second major surface close to the back surface of the decorative sheet, and allowing visible light to pass through; A first pattern layer, disposed on the second major surface side of the base film, and presenting a first mixed color by including a plurality of interference pigments in a first group in a first adhesive that allows visible light to pass through, the plurality of interference pigments in the first group emitting interference light of a plurality of different colors in a first direction from the back surface of the decorative sheet toward the front surface of the decorative sheet; A second pattern layer is disposed on the second major surface side of the base film, and presents a second mixed color different from the first mixed color by including a plurality of interference pigments of a second group in a second adhesive that allows visible light to pass through. The plurality of interference pigments of the second group respectively emit interference light of a plurality of different colors in the first direction; An optical function layer is disposed on one side of the base film close to the front surface, and has an optical function of changing the reflection characteristics of light and allowing visible light to pass through; and An adhesive layer is disposed on the back surface, allows visible light to pass through, and can be bonded to the molded body, The first pattern layer and the second pattern layer are configured to: combine the first planar shape of the first pattern layer and the second planar shape of the second pattern layer to display a pattern that can be visually confirmed from the front side. Moreover, the plurality of interference pigments of the first group, the plurality of interference pigments of the second group, the first adhesive, and the second adhesive allow incident light advancing in the first direction to pass through, so that an image displayed on the back side can be visually confirmed from the front side, The optical function layer is configured to have the following reflection characteristics: increasing the ratio of at least one of the amount of visible light showing the pattern and the amount of visible light showing the image passing through the first pattern layer and the second pattern layer to the amount of visible light visually confirmed by reflection on the front surface.

8. A method for manufacturing a molded article, comprising: a step of disposing a decorative sheet in a cavity of a mold; and a step of transferring a transfer layer of the decorative sheet to the molded body while injecting a molten material into the mold to mold a translucent molded body, The transfer layer has: a protective layer having a first major surface close to the front surface of the decorative sheet and a second major surface close to the back surface of the decorative sheet, and allowing visible light to pass through; a first pattern layer disposed on the second major surface side of the protective layer, and presenting a first mixed color by including a plurality of interference pigments of a first group in a first adhesive that allows visible light to pass through. The plurality of interference pigments of the first group respectively emit interference light of a plurality of different colors in a first direction from the back surface of the transfer layer toward the front surface of the transfer layer; a second pattern layer disposed on the second major surface side of the protective layer, and presenting a second mixed color different from the first mixed color by including a plurality of interference pigments of a second group in a second adhesive that allows visible light to pass through. The plurality of interference pigments of the second group respectively emit interference light of a plurality of different colors in the first direction; an optical function layer disposed on a side closer to the front surface of the transfer layer than the protective layer, and having an optical function of changing the reflection characteristics of light and allowing visible light to pass through; and an adhesive layer disposed on the back surface of the transfer layer, allowing visible light to pass through, and capable of being bonded to the molded body, The first pattern layer and the second pattern layer are configured such that: the first planar shape of the first pattern layer and the second planar shape of the second pattern layer are combined to display a pattern that can be visually recognized from the front side, and the first group of interference pigments, the second group of interference pigments, the first adhesive, and the second adhesive allow incident light traveling in the first direction to pass through, so that an image displayed on the back side can be visually recognized from the front side. The optical functional layer is configured to have the following reflection characteristics: increasing the proportion of at least one of the amount of visible light representing the pattern and the amount of visible light representing the image that has passed through the first pattern layer and the second pattern layer with respect to the amount of visible light that is visually recognized by reflection on the front side.

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