JP2020049886A - Decorative molded article, image display device using the same, and transfer sheet - Google Patents

Abstract

To provide a decorative molded article capable of suppressing a difference of hue in a region different in feeling while keeping antireflection properties favorable.SOLUTION: The decorative molded article 300, which is a decorative molded article 300 having a transfer layer 50 on an adherend 200, has a first region A1 and a second region A2 when plane-viewing from the transfer layer 50 side. In the decorative molded article 300, an arithmetic average roughness Ra1 of the first region A1 and an arithmetic average roughness Ra2 of the second region A2 satisfy the relation: Ra1>Ra2, the transfer layer 50 has at least an adhesive layer 40, a protective layer 20, and an antireflection layer 10 from an adherend 200 side, the antireflection layer 10 is a single layer structure composed of a low reflective index layer 10a, when spectral reflectances in a wave length x(nm) of the first region A1 and the second region A2 are S1% and S2% respectively, the minimum value of S2 in a region of wave length 380-780 nm is 0.60% or more and 1.50% or less, and the average of |S1-S2| in a region of wave length 540-570 nm is 1.00% or less.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a decorative molded product, an image display device using the same, and a transfer sheet.

2. Description of the Related Art Conventionally, in the fields of household electric appliances, automobile interior goods, miscellaneous goods, and the like, high functionality and design have been developed by decorating the surface of an adherend with characters and pictures.
As a method of decorating the surface of the adherend, there is a transfer method. The transfer method uses a transfer sheet having a transfer layer composed of a release layer, a pattern layer, an adhesive layer, etc. formed on a base material, and applying heat and pressure to bring the transfer layer into close contact with the adherend. This is a method of decorating by peeling and transferring only the transfer layer to the surface of the adherend.

  In some applications, the surface of the adherend is required to have excellent design properties such as high-grade feeling and different feelings such as glossiness and matteness. Patent Documents 1 and 2 have been proposed as being capable of imparting such a design to an adherend.

Japanese Patent No. 5095598 JP 2017-154462 A

  The transfer sheets of Patent Literatures 1 and 2 make it possible to form a portion having an uneven shape and a smooth portion on the surface of an adherend. Different textures can be provided.

  However, the decorative molded products obtained from the transfer sheets of Patent Documents 1 and 2 have insufficient antireflection properties (especially antireflection properties of smooth portions) and cannot be said to have a high level of design. Was.

In order to enhance the antireflection property of the decorative molded article, it is conceivable to configure the transfer sheet so that the antireflection layer is disposed on the outermost surface of the decorative molded article. Specifically, it is conceivable to dispose an antireflection layer on the substrate side of the transfer layer.
However, the decorative molded product obtained from the transfer sheet having the anti-reflection layer disposed on the substrate side of the transfer layer can improve the anti-reflection property, but the color of the uneven portion and the smooth portion can be improved. Were frequently different and could not be said to have a high level of design.

As a result of intensive studies, the present inventors have completed a decorative molded product capable of suppressing differences in tint in regions having different textures while improving antireflection properties. That is, the present invention provides the following [1] to [3].
[1] A decorative molded product having a transfer layer on an adherend, wherein the decorative molded product is adjacent to the first region A1 and the first region when viewed in plan from the transfer layer side. The second region A2, the arithmetic average roughness Ra1 of the surface of the first region A1, and the arithmetic average roughness Ra2 of the surface of the second region A2 satisfy the relationship of Ra1> Ra2, The transfer layer has at least an adhesive layer, a protective layer, and an antireflection layer from the adherend side, and the first area A1 and the second area measured from the transfer layer side of the decorative molded article. When the spectral reflectance of the wavelength x (nm) of A2 is S1 (%) and S2 (%), the minimum value of S2 in the wavelength range of 380 to 780 nm is 0.60% to 1.50%. And the average of | S1-S2 | in the wavelength range of 540 to 570 nm is 1. Or less 0%, decorative moldings.
[2] A transfer sheet having a transfer layer on a release sheet, wherein the release sheet is adjacent to the first area A1 'and the first area when viewed in plan from the side in contact with the transfer layer. And the arithmetic average roughness Ra1 ′ of the surface of the first area A1 ′ and the arithmetic average roughness Ra2 ′ of the surface of the second area A2 ′ are Ra1 ′> Ra2. ', The transfer layer, from the release sheet side, at least, has an antireflection layer, a protective layer and an adhesive layer, the antireflection layer is a single layer structure of a low refractive index layer, A transfer sheet that satisfies the following condition 1:
<Condition 1>
After bonding the transfer layer side surface of the transfer sheet to a black plate, the release sheet is peeled off, and a sample B is prepared by transferring the transfer layer onto the black plate. When the sample B is viewed from the transfer layer side in a plan view, a portion corresponding to the first region A1 ′ is a first region A1, and a portion corresponding to the second region A2 ′ is a second region A2. When the spectral reflectance of the first region A1 and the second region A2 at the wavelength x (nm) measured from the transfer layer side of the sample B is S1 (%) and S2 (%), respectively, The minimum value of S2 in the region of 380 to 780 nm is 0.60% or more and 1.50% or less, and the average of | S1-S2 | in the region of 540 to 570 nm is 1.00% or less.
[3] On the display element, the decorative molded article according to the above [1] is provided, and the decorative molded article is arranged so that the surface on the adherend side of the decorative molded article faces the display element side. , Image display device.

  ADVANTAGE OF THE INVENTION According to this invention, the decorative molded article which can suppress the difference of the color of the area | region where texture differs while improving antireflection property can be provided.

It is sectional drawing which shows one Embodiment of the decorative molded article of this invention. It is a top view showing one embodiment of a decorative molding of the present invention. 9 is a graph showing S1 and S2 of Example 2. 7 is a graph showing S1 and S2 of Comparative Example 1. It is a graph which shows S1-S2 of Examples 1-5. 9 is a graph showing S1-S2 of Comparative Examples 1-4. FIG. 2 is a cross-sectional view illustrating an embodiment of the transfer sheet of the present invention.

  Hereinafter, embodiments of the decorative molded product of the present invention, an image display device using the decorative molded product, and a transfer sheet will be described. In addition, in this specification, AA-BB means that it is AA or more and BB or less.

[Decorative molded products]
The decorative molded article of the present invention has a transfer layer on an adherend, and when viewed in plan from the transfer layer side, a first area A1 and a second area A2 adjacent to the first area. The arithmetic average roughness Ra1 of the surface of the first region A1 and the arithmetic average roughness Ra2 of the surface of the second region A2 satisfy the relationship of Ra1> Ra2, and the transfer layer From the adherend side, at least, an adhesive layer, a protective layer and an antireflection layer, the antireflection layer has a single-layer structure of a low refractive index layer, measured from the transfer layer side of the decorative molded article When the spectral reflectances of the first region A1 and the second region A2 at the wavelength x (nm) are S1 (%) and S2 (%), respectively, the minimum value of S2 in the region of 380 to 780 nm is 0.60% or more and 1.50% or less and in a wavelength range of 540 to 570 nm. | S1-S2 | average is less than 1.00%, those.

FIG. 1 is a sectional view showing one embodiment of a decorative molded product 300 of the present invention.
The decorative molded product 300 in FIG. 1 has the transfer layer 50 on the adherend 200, and when viewed in plan from the transfer layer side, the first region A1 and the second region A2 adjacent to the first region. And The transfer layer 50 of the decorative molded article in FIG. 1 has the adhesive layer 40, the anchor coat layer 30, the protective layer 20, and the antireflection layer 10 from the adherend 200 side. This is a single-layer structure of the refractive index layer 10a.

<First area A1 and second area A2>
The decorative molded article of the present invention has a first area A1 and a second area A2 adjacent to the first area when viewed from above from the transfer layer side. Further, in the decorative molded product of the present invention, the arithmetic average roughness Ra1 of the surface of the first region A1 and the arithmetic average roughness Ra2 of the surface of the second region A2 satisfy the relationship of Ra1> Ra2. Cost.
When the first region A1 and the second region A2 satisfy the relationship of Ra1> Ra2, regions having different textures are formed on the surface of the decorative molded product, and it is easy to improve the design of the decorative molded product.
In the present specification, the arithmetic average roughness Ra means the arithmetic average roughness Ra according to JIS B0601: 1994 when the cutoff value is 0.8 mm.

Ra1 is preferably from 0.06 to 0.50 µm, more preferably from 0.08 to 0.40 µm, even more preferably from 0.10 to 0.30 µm, and more preferably from 0.15 to 0. Even more preferably, it is 25 μm.
By setting Ra1 to 0.06 μm or more, the antiglare property of the first region can be easily improved, and by setting Ra1 to 0.50 μm or less, whitening of the first region can be suppressed.

  Ra2 clarifies the difference in texture between the first region having the irregularities and improves the design, and facilitates setting the minimum value of S2 in the wavelength region of 380 to 780 nm to 1.50% or less. Therefore, it is preferably 0.05 μm or less, and more preferably 0.03 μm or less.

The difference (Ra1-Ra2) between Ra1 and Ra2 is preferably 0.04 to 0.50 μm, more preferably 0.06 to 0.40 μm, and 0.10 to 0.30 μm. Is more preferred.
By setting Ra1−Ra2 to be equal to or greater than 0.04 μm, it is possible to easily recognize a difference in texture between the first region A1 and the second region A2. Further, by setting Ra1−Ra2 to 0.50 μm or less, it is possible to suppress the first region from being whitened due to Ra1 becoming excessively large.

  In the present specification, arithmetic average roughness Ra1 and Ra2 are obtained by preparing a sample cut out from a place where there is no abnormal point such as dust and scratch, and averaging the measured values at any 20 places where there is no defect or abnormal point. Value.

The arrangement of the first area A1 and the second area A2 is arbitrary. For example, a configuration in which one independent first region A1 is arranged and a second region A2 surrounding the first region A1 is arranged (type 1 (the configuration in FIG. 2)); A configuration in which the first area A1 surrounding the second area A2 is arranged (type 2); a plurality of independent first areas A1 are arranged, and the second area A2 is arranged around the plurality of first areas A1. (Type 3); a configuration in which a plurality of independent second regions A2 are disposed, and a first region A1 disposed around the plurality of second regions A2 (type 4); and the like. Of the four types described above, types 1 and 2 are preferred in that the effects of the present invention can be easily recognized.
Note that the transfer layer may have another area on the surface.

  The ratio between the area of the first region A1 and the area of the second region A2 is not particularly limited because it changes depending on the design to be provided. However, from the viewpoint of clarifying the difference in texture between the two regions, the ratio is 0%. It is preferable that the following relationship is satisfied: 1 ≦ area of first region A1 / area of second region A2 ≦ 10.0.

<Spectral reflectance, reflectance Y value>
In the decorative molded product of the present invention, the spectral reflectances of the first region A1 and the second region A2 at the wavelength x (nm) measured from the transfer layer side of the decorative molded product are S1 (%) and S2 (%), respectively. ), The minimum value of S2 in the wavelength range of 380 to 780 nm is 0.60% or more and 1.50% or less, and the average of | S1-S2 | in the wavelength range of 540 to 570 nm is 1. It must be less than 00%.

S1-S2 indicates a difference in spectral reflectance between the first region A1 and the second region A2 at an arbitrary wavelength x (nm). | S1−S2 | is the absolute value of the difference between the spectral reflectances. The human eye has the highest sensitivity at a wavelength of 555 nm, and the sensitivity gradually decreases as the distance from 555 nm increases. Therefore, the wavelength range of 540 to 570 nm means a region where the sensitivity of human eyes is high. That is, in the present invention, in the region of wavelength 540 to 570 nm where the sensitivity of human eyes is high, the average of the absolute value of the difference between the spectral reflectances of the first region A1 and the second region A2 is 1.00% or less. Stipulates.
When the average of | S1-S2 | in the region of wavelength 540 to 570 nm exceeds 1.00%, the difference in tint between the first region A1 and the second region A2 cannot be suppressed, and a high level of design property is imparted. Can not do it. When the decorative molded product is used as the front plate of the display element, the effect of suppressing the color difference between the first area A1 and the second area A2 is due to the state where the image is not displayed when the power is turned off. , The effect can be remarkably exhibited.

  The average of | S1−S2 | in the wavelength range of 540 to 570 nm is preferably 0.70% or less, more preferably 0.50% or less. The lower limit of the average of | S1−S2 | in the wavelength range of 540 to 570 nm is not particularly limited, but is about 0.20%.

In order to make the average of | S1−S2 | in the region of wavelength 540 to 570 nm to be 1.00% or less, it is important that the minimum value of S2 in the region of wavelength 380 to 780 nm be 0.60% or more. . In addition, setting the minimum value of S2 in the wavelength range of 380 to 780 nm to be 0.60% or more means that “| S1−S2 | in the entire wavelength range of 380 to 780 nm” and “| ΔSmax−ΔSmin |” will be described later. It is also effective in making it easier to do.
FIG. 3 is a graph showing the spectral reflectance of the first region A1 and the second region A2 of the decorative molded product of Example 2 (the antireflection layer has a single-layer structure of a low refractive index layer), and FIG. 4 is a comparative example. 1 is a graph showing the spectral reflectance of a first region A1 and a second region A2 of a decorative molded product of No. 1 (a two-layer structure in which an antireflection layer has a high refractive index layer and a low refractive index layer). In other words, FIG. 3 is a graph showing S1 and S2 of Example 2, and FIG. 4 is a graph showing S1 and S2 of Comparative Example 1.
The reflectance (S1) for each wavelength of the first region A1 is substantially constant at a not so low level (less than 2%) in both FIG. 3 and FIG. On the other hand, the reflectance (S2) for each wavelength of the second region A2 has a small change in FIG. 3 but a large change in FIG. The antireflection layer having a two-layer structure reduces the reflectance near the wavelength of 555 nm by causing the reflection on the surface of the low-refractive-index layer and the reflection on the surface of the high-refractive-index layer to interfere with each other, thereby reducing the reflectance. It is designed to have high reflectivity. For this reason, the reflectance (S2) for each wavelength of the second region A2 in FIG. 4 changes greatly. In addition, since the first region A1 has surface irregularities, the above-described interference action hardly works, and the reflectance does not sufficiently decrease. (This is because when the antireflection layer is formed on the irregular surface, the thickness unevenness is likely to occur. (Especially, when the anti-reflection layer is formed by a wet method, the thickness of the concave portion is larger than that of the convex portion, and the thickness unevenness is likely to occur.) Therefore, a portion having a strong interference effect and a weak portion are generated, and these portions are mixed. Is considered to be averaged.) For this reason, in Comparative Example 1 of FIG. 4, there is a wavelength region in which the difference between the reflectance (S1) of the first region A1 and the reflectance (S2) of the second region A2 is large, and the wavelength region is human. This matches the wavelength range where the eye sensitivity is high (around 555 nm).

FIG. 5 is a graph showing S1-S2 of Examples 1 to 5, and FIG. 6 is a graph showing S1-S2 of Comparative Examples 1 to 4. Comparing FIG. 5 with FIG. 6, it can be confirmed that FIG. 5 can suppress | S1−S2 | in the region of the wavelength 540 to 570 nm to a smaller level than FIG.
Usually, the antireflection layer is designed to increase the interference effect and reduce the reflectance. Although the interference effect can be increased to some extent even with a single low refractive index layer, the antireflection layer is usually designed to have a multilayer structure of two or more layers to enhance the interference effect.
However, when an antireflection layer having a strong interference effect is applied to a decorative molded product having a first region having surface irregularities and a second region having less surface irregularities, the second region has a reflectance due to the interference effect. However, since the reflectance of the first region does not sufficiently decrease, the difference in spectral reflectance between the two regions increases, and the difference in tint between the two regions becomes significant. In addition, the wavelength range where the difference in tint is remarkable matches the wavelength range where human eyes have high sensitivity (around 555 nm).
Therefore, the decorative molded article of the present invention sets the minimum value of the spectral reflectance to 0.60% or more in the second region in which the reflectance is easily lowered, so that the reflectance is not excessively lowered, so that This makes it possible to suppress a difference in the color of a decorative molded product having two regions having different textures.

In the decorative molded product of the present invention, the minimum value of S2 in the wavelength range of 380 to 780 nm needs to be 0.60% or more and 1.50% or less.
By setting the minimum value of S2 to 0.60% or more, the average of | S1-S2 | in the wavelength range of 540 to 570 nm can be easily reduced to 1.00% or less. Further, by setting the minimum value of S2 to 1.50% or less, the antireflection property of the second region can be easily improved.
The minimum value of S2 in the wavelength range of 380 to 780 nm is preferably 0.70% or more and 1.30% or less, more preferably 0.80% or more and 1.10% or less, and 0.90% or less. More preferably, it is at least 1.00%.

  The wavelength showing the minimum value of S2 is preferably 440 to 500 nm or 600 to 660 nm, more preferably 440 to 480 nm or 620 to 660 nm. By setting the wavelength showing the minimum value of S2 within the above range, the average of | S1−S2 | in the wavelength range of 540 to 570 nm can be easily reduced to 1.00% or less.

  In the decorative molded product of the present invention, | S1−S2 | is preferably 1.50% or less, preferably 1.00% or less, and 0.75% in the entire wavelength range of 380 to 780 nm. It is more preferred that: The definition means that the absolute value of the difference between the spectral reflectances of the first region A1 and the second region A2 is 1.25% or less over the entire wavelength range of 380 to 780 nm (the entire wavelength range of visible light). ing. By satisfying the stipulation, it is possible to further suppress the difference in tint between the first area A1 and the second area A2.

In the decorative molded product of the present invention, when the maximum value of S1-S2 is ΔSmax (%) and the minimum value of S1-S2 is ΔSmin (%) in the wavelength range of 380 to 780 nm, | ΔSmax− ΔSmin | is preferably at most 1.70%, more preferably at most 1.60%, even more preferably at most 1.50%.
The fact that | ΔSmax−ΔSmin | is small means that the difference (S1−S2) in the spectral reflectance between the first region A1 and the second region A2 does not greatly differ depending on the wavelength. Therefore, by setting | ΔSmax−ΔSmin | to 1.50% or less, the difference in tint between the first region A1 and the second region A2 can be further suppressed.

In addition, in the decorative molded product of the present invention, the variation of S1 in a wavelength range of 380 to 780 nm is preferably 0.25% or less, more preferably 0.15% or less, and 0.10% or less. Is more preferable.
By setting the variation of S1 to 0.25% or less, the first region A1 becomes a neutral color, and the design of the decorative molded product can be further improved. The variation in S1 can be easily reduced by forming the antireflection layer by a wet method.

In the present specification, the spectral reflectance for each wavelength in the first area A1 and the second area A2, and the reflectance Y values of the first area A1 and the second area A2 indicate an average value of measured values at 20 points. Shall be. The spectral reflectance measured from the transfer layer side of the decorative molded product and the reflectance Y value described later can be measured with a spectrophotometer. Regarding the measurement conditions of the spectral reflectance, it is preferable to measure the regular reflectance at an incident angle of 5 degrees at a wavelength interval of 1 nm in a wavelength range of 380 nm to 780 nm. It is preferable that the reflectance Y value is calculated from the obtained spectral reflectance by using an attached software or the like as an observation condition as a C light source and a viewing angle of 2 degrees. As an example of a spectrophotometer, a combination of the product name "V-670" of an ultraviolet-visible spectrophotometer manufactured by JASCO Corporation and an attached automatic absolute reflectance measurement unit, or a product name manufactured by Murakami Color Research Laboratory "GCMS-11" may be mentioned. The spectral reflectance of Sample B produced from a transfer sheet described later can also be measured under the same conditions.
When measuring the spectral reflectance and the reflectance Y value to be described later, a sample A was prepared in which a black plate was arranged via an adhesive layer on the back of the decorative molded product in order to suppress back reflection. It is preferable to measure. The adhesive layer used for Sample A preferably has a refractive index difference of 0.05 or less from the refractive indexes of the adherend and the black plate.

In the decorative molded product of the present invention, the reflectance Y values of the first region A1 and the second region A2 measured from the transfer layer side of the decorative molded product were R1 (%) and R2 (%), respectively. In this case, both R1 and R2 are preferably 2.0 (%) or less, and more preferably 1.8% or less.
By setting both R1 and R2 to 2.0 (%) or less, reflection of external light in the first region A1 and the second region A2 can be suppressed, and the design can be further improved. Considering that the minimum value of S2 in the wavelength range of 380 to 780 nm is 0.60% or more, the lower limit of R2 is about 1.0%. The lower limit of R1 is about 1.5%.
In this specification, the reflectance Y value refers to the Y value of the XYZ color system of CIE1931.

<Other optical characteristics>
At least a part of the decorative molded product preferably has a total light transmittance of 50% or more, more preferably 70% or more, in accordance with JIS K7361-1: 1997.
When the decorative molded article has a printing layer described below, it is preferable that the total light transmittance is in the above range at locations other than the location having the printing layer. When the decorative molded product has the total light transmittance in the above range, for example, when the decorative molded product is used as the front plate of the display element, the visibility of the display element can be improved.
In addition, when the decorative molded article has a printing layer described later, the total light transmittance of the portion having the printing layer may be low, or may be substantially 0%.

The haze of the first region A1 of the decorative molded product according to JIS K7136: 2000 is preferably from 2.0 to 10%, more preferably from 2.5 to 8.0%.
The haze of the second region A2 of the decorative molded product is preferably 5.0% or less, more preferably 3.0% or less, and even more preferably 2.0% or less.
When the decorative molded product has a printing layer, it is preferable that the haze of the first region A1 and the second region A2 is in the above range at a portion other than the portion having the printing layer.
In addition, when the decorative molded article has a printing layer described below, the portion having the printing layer may have hiding properties and haze may not be substantially measurable.

The difference in interlayer refractive index between the layers constituting the decorative molded product (excluding the difference in interlayer refractive index involving the antireflection layer) is preferably 0.08 or less, more preferably 0.06 or less. Is more preferred. By setting the interlayer refractive index in the above-described range, “average of | S1−S2 | in the region of wavelength 540 to 570 nm”, “| S1−S2 | in the entire region of wavelength 380 to 780 nm”, and “| | ”Can be easily set in the above range.
In addition, in this specification, the refractive index refers to the refractive index at a wavelength of 589.3 nm. The refractive index of each layer can be calculated by, for example, a microspectrophotometer.

<Adherend>
Examples of the adherend include a molded body made of metal, glass, ceramics, resin, or the like. Among these, a resin molded body is preferable.
The shape of the adherend may be a flat plate shape or a three-dimensional shape having a curved surface or the like. Further, the adherend may be colored.

The resin molded body is preferably formed from a thermoplastic resin or a thermosetting resin that can be injection molded.
When the decorative molded article is manufactured by in-mold molding, it is preferable to use a thermoplastic resin as the resin molded body. Examples of such a thermoplastic resin include a polystyrene resin, a polyolefin resin, an ABS resin (including a heat-resistant ABS resin), an AS resin, an AN resin, a polyphenylene oxide resin, a polycarbonate resin, a polyacetal resin, an acrylic resin, Examples include polyethylene terephthalate-based resin, polybutylene terephthalate-based resin, polysulfone-based resin, and polyphenylene sulfide-based resin. Among them, polycarbonate resins having good impact resistance are preferable.
When the adherend is a resin molded body containing a polycarbonate-based resin, the refractive index of the adherend is preferably 1.58 to 1.60.

  The thickness of the adherend is not particularly limited, and may be appropriately determined depending on the application. When a decorative molded product is used as a front plate of a display element, it is preferably 0.3 to 5.0 mm, and more preferably 1.0 to 2.5 mm, from the viewpoint of balance between strength and thinning. More preferred.

<Transfer layer>
The transfer layer has at least an adhesive layer, a protective layer, and an antireflection layer from the adherend side.
Further, the transfer layer may have another layer other than the adhesive layer, the protective layer and the antireflection layer. Other layers include an anchor coat layer and an antistatic layer.

<< adhesive layer >>
The adhesive layer is disposed on the adherend side of the transfer layer, and has a role of improving the adhesiveness between the adherend such as a resin molded article and the transfer layer, and improving the transfer operation.

For the adhesive layer, it is preferable to use a heat-sensitive or pressure-sensitive resin suitable for the material of the adherend. For example, when the material of the adherend is an acrylic resin, it is preferable to use an acrylic resin. When the adherend is made of polyphenylene oxide / polystyrene resin, polycarbonate resin, or styrene resin, an acrylic resin, polystyrene resin, polyamide resin, polyester resin, or the like having an affinity for these resins. It is preferred to use Further, when the material of the adherend is a polypropylene resin, it is preferable to use a chlorinated polyolefin resin, a chlorinated ethylene-vinyl acetate copolymer resin, a cyclized rubber, and a coumarone indene resin.
When the adherend is injection-molded, the adhesive layer preferably has heat sensitivity (heat sealing property).

The adhesive layer may contain additives such as an ultraviolet absorber and an infrared absorber.
The thickness of the adhesive layer is preferably from 0.1 to 10 μm, more preferably from 0.5 to 5 μm.

Since the adhesive layer is in contact with the adherend, the difference in refractive index from the adherend is preferably 0.08 or less, more preferably 0.06 or less.
When the adherend is a resin molded article containing a polycarbonate resin, the refractive index of the adhesive layer is preferably from 1.51 to 1.67, more preferably from 1.53 to 1.65.

<< Anchor coat layer >>
The anchor coat layer is a layer provided as needed to improve heat resistance when placed in a high-temperature environment such as in-mold molding. The anchor coat layer is preferably formed between the protective layer and the adhesive layer.

The anchor coat layer preferably contains a cured product of a curable resin composition.
Examples of the curable resin composition include a thermosetting resin composition and an ionizing radiation-curable resin composition.
The embodiment of the thermosetting resin composition and the ionizing radiation-curable resin composition of the anchor coat layer is the same as the embodiment of the thermosetting resin composition and the ionizing radiation-curable resin composition of the protective layer.
The thickness of the anchor coat layer is preferably from 0.1 to 6 μm, and more preferably from 0.5 to 5 μm.

The anchor coat layer preferably has a difference in refractive index between adjacent layers (for example, an adhesive layer and a protective layer) of 0.08 or less, more preferably 0.06 or less.
When the adherend is a resin molded body containing a polycarbonate resin, the refractive index of the anchor coat layer is preferably from 1.51 to 1.67, and more preferably from 1.53 to 1.65.

<< Protective layer >>
The protective layer preferably contains a cured product of the curable resin composition as a main component. The main component means 50% by mass or more of the total solids constituting the protective layer, and the proportion is preferably 70% by mass or more, more preferably 80% by mass or more, and 90% by mass or more. Is even more preferred.
The cured product of the curable resin composition includes a cured product of a thermosetting resin composition and a cured product of an ionizing radiation-curable resin composition. Among these, a cured product of the ionizing radiation-curable resin composition is preferable.
Further, the protective layer may contain a thermoplastic resin, but from the viewpoint of improving the abrasion resistance, the amount is preferably small. Specifically, the content of the thermoplastic resin in the protective layer is preferably less than 5% by mass, more preferably less than 1% by mass, even more preferably less than 0.1% by mass, Even more preferably, it is 0% by mass.
Hereinafter, the cured product of the curable resin composition and the thermoplastic resin may be referred to as “resin component”.

  The thermosetting resin composition is a composition containing at least a thermosetting resin, and is a resin composition that is cured by heating. Examples of the thermosetting resin include acrylic resin, urethane resin, phenol resin, urea melamine resin, epoxy resin, unsaturated polyester resin, and silicone resin. In the thermosetting resin composition, a curing agent is added to these curable resins as necessary.

The ionizing radiation-curable resin composition is a composition containing a compound having an ionizing radiation-curable functional group (hereinafter, also referred to as “ionizing radiation-curable compound”). Examples of the ionizing radiation-curable functional group include an ethylenically unsaturated bond group such as a (meth) acryloyl group, a vinyl group and an allyl group, and an epoxy group and an oxetanyl group.
As the ionizing radiation-curable resin, a compound having an ethylenically unsaturated bond group is preferable. In addition, from the viewpoint of suppressing the resin layer from being damaged in the process of producing the transfer sheet, the ionizing radiation-curable resin is more preferably a compound having two or more ethylenically unsaturated bond groups, and among them, ethylenically unsaturated compounds are preferred. A polyfunctional (meth) acrylate compound having two or more saturated bonding groups is more preferable. As the polyfunctional (meth) acrylate compound, any of a monomer and an oligomer can be used.
In addition, ionizing radiation means, among electromagnetic waves or charged particle beams, those having energy quanta capable of polymerizing or cross-linking molecules. Usually, ultraviolet (UV) or electron beam (EB) is used. Electromagnetic waves such as X-rays and γ-rays, and charged particle beams such as α-rays and ion beams can also be used.

Among the polyfunctional (meth) acrylate compounds, the bifunctional (meth) acrylate monomers include ethylene glycol di (meth) acrylate, bisphenol A tetraethoxy diacrylate, bisphenol A tetrapropoxy diacrylate, and 1,6-hexane. Diol diacrylate and the like.
Examples of the trifunctional or higher functional (meth) acrylate-based monomer include, for example, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, Examples include pentaerythritol tetra (meth) acrylate and isocyanuric acid-modified tri (meth) acrylate.
The (meth) acrylate-based monomer may have a partially modified molecular skeleton, and may be modified by ethylene oxide, propylene oxide, caprolactone, isocyanuric acid, alkyl, cyclic alkyl, aromatic, bisphenol, or the like. Can also be used.

Examples of the polyfunctional (meth) acrylate oligomer include acrylate polymers such as urethane (meth) acrylate, epoxy (meth) acrylate, polyester (meth) acrylate, and polyether (meth) acrylate.
Urethane (meth) acrylate is obtained, for example, by reacting a polyhydric alcohol and an organic diisocyanate with hydroxy (meth) acrylate.
Preferred epoxy (meth) acrylates are (meth) acrylates obtained by reacting a (meth) acrylic acid with a trifunctional or higher functional aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, or the like. (Meth) acrylates obtained by reacting the above aromatic epoxy resin, alicyclic epoxy resin, aliphatic epoxy resin, etc. with a polybasic acid and (meth) acrylic acid, and a bifunctional or higher functional aromatic epoxy resin, (Meth) acrylate obtained by reacting an alicyclic epoxy resin, an aliphatic epoxy resin or the like with a phenol and (meth) acrylic acid.
The ionizing radiation-curable resin can be used alone or in combination of two or more.

When the ionizing radiation-curable resin is an ultraviolet-curable resin, the coating liquid for forming a protective layer preferably contains additives such as a photopolymerization initiator and a photopolymerization accelerator.
Examples of the photopolymerization initiator include one or more selected from acetophenone, benzophenone, α-hydroxyalkylphenone, Michler's ketone, benzoin, benzyldimethylketal, benzoylbenzoate, α-acyl oxime ester, thioxanthone, and the like.
Further, the photopolymerization accelerator can reduce the polymerization inhibition by air at the time of curing and can increase the curing speed. For example, isoamyl p-dimethylaminobenzoate, ethyl p-dimethylaminobenzoate, etc. One or more selected ones are mentioned.

  The curable resin composition is kept in a semi-cured state at the time of forming the protective layer, and after being transferred to the adherend, the curing of the curable resin composition is advanced by heating, irradiation with ionizing radiation, or the like. May be completely cured. By doing so, the followability of the protective layer to the adherend is improved, so that the moldability can be improved.

  The protective layer may contain particles such as organic particles and inorganic particles. By containing particles in the protective layer, glare and defects can be made less noticeable due to the appearance of internal haze due to the difference in refractive index from the resin component. For the same purpose, these particles may be contained in the adhesive layer, the anchor coat layer and the like.

  The thickness of the protective layer is preferably from 0.5 to 30 μm, more preferably from 1 to 20 μm, even more preferably from 3 to 10 μm, from the viewpoint of the balance between surface hardness and moldability.

The protective layer preferably has a refractive index difference of 0.08 or less, more preferably 0.06 or less, with an adjacent layer other than the antireflection layer (for example, an anchor coat layer or an adhesive layer).
When the adherend is a resin molded product containing a polycarbonate resin, the protective layer preferably has a refractive index of 1.51 to 1.67, and more preferably 1.53 to 1.65.

<< Anti-reflection layer >>
The antireflection layer is located on the side of the transfer layer that is farthest from the adherend.
As described above, the decorative molded product of the present invention suppresses the interference effect of the antireflection layer, and sets the minimum value of S2 in the wavelength range of 380 to 780 nm to 0.60% or more, whereby the wavelength is 380 to 780 nm. | S1−S2 | is set to 1.25% or less in the entire region of.
When the minimum value of S2 in the wavelength range of 380 to 780 nm is less than 0.60% and the interference effect of the anti-reflection layer is strong, | S1− in the entire wavelength range of 380 to 780 nm as shown in FIGS. It is difficult to set S2 | to 1.25% or less, and it is not possible to suppress a difference in tint between the first area A1 and the second area A2.
For this reason, it is preferable that the anti-reflection layer has a design that suppresses the interference effect, unlike a normal design. For example, the antireflection layer preferably has a single-layer structure of a low refractive index layer.

The refractive index of the low refractive index layer is preferably from 1.28 to 1.40, and more preferably from 1.32 to 1.38.
Further, the thickness of the low refractive index layer is preferably from 80 to 120 nm, more preferably from 85 to 110 nm, and further preferably from 90 to 105 nm.

The low refractive index layer can be formed by, for example, a wet method.
Specifically, a method of forming by a sol-gel method using a metal alkoxide, a method of applying and forming a resin having a low refractive index such as a fluororesin, a method of forming a resin composition containing low refractive index particles, A method of applying and forming a coating liquid for forming a refractive index layer may be used. Among these, it is preferable to form with a coating liquid for forming a low refractive index layer in which low refractive index particles are contained in a binder resin composition. As the binder resin composition, for example, the curable resin composition exemplified for the protective layer can be used.

The low-refractive-index particles can be used without limitation, regardless of whether they are particles made of an inorganic compound such as silica and magnesium fluoride or particles made of an organic compound. However, the viewpoint of improving the antireflection properties by lowering the refractive index. Therefore, particles having a structure having voids are preferably used.
Particles having a structure having voids have fine voids therein, and, for example, are filled with a gas such as air having a refractive index of 1.0, so that the refractive index of the particles themselves becomes low. I have. Examples of particles having such voids include inorganic or organic porous particles, hollow particles, and the like, for example, porous silica, hollow silica particles, or porous polymer particles using an acrylic resin or the like. And hollow polymer particles.
The average particle diameter of the primary particles of the low refractive index particles is preferably from 5 to 200 nm, more preferably from 5 to 100 nm, and still more preferably from 10 to 80 nm.

  Each layer (antireflection layer, protective layer, anchor coat layer, adhesive layer, etc.) constituting the transfer layer is prepared, for example, by preparing a coating solution containing the components of each layer, and applying a gravure coating method and a roll on a release sheet. It can be formed by applying and drying by a coating method such as a coating method or a printing method such as a gravure printing method or a screen printing method, and irradiating with ionizing radiation as needed, and curing.

<Print layer>
The printing layer is a layer for imparting a desired design property to the decorative molded product, and is a layer provided as desired.
The pattern of the printing layer is arbitrary, and examples thereof include wood grain, stone grain, cloth grain, grain, circle, square, polygon, geometric pattern, character, and solid printing.

The printing layer preferably contains a binder resin such as a polyvinyl resin, a polyester resin, an acrylic resin, a polyvinyl acetal resin, and a cellulose resin, and a pigment and / or a dye.
The thickness of the printing layer is preferably from 0.5 to 40 μm, more preferably from 1 to 30 μm, from the viewpoint of design.

  The printing layer can be formed, for example, on the surface of the adherend opposite to the transfer layer. The printing layer may be formed in the transfer layer as long as the effect of the present invention is not impaired.

<Application>
The decorative molded product of the present invention can be used, for example, as a front plate of a display element.
Examples of the display element include a liquid crystal display element, an EL (inorganic EL, organic EL) display element, a plasma display element, and an LED display element (such as a micro LED). Note that the liquid crystal display element may be an in-cell touch panel liquid crystal display element having a touch panel function in the element.

[Transfer sheet]
The transfer sheet of the present invention is a transfer sheet having a transfer layer on a release sheet, wherein the release sheet has a first area A1 ′ and a second area when viewed in plan from a side in contact with the transfer layer. A second region A2 ′ adjacent to one region, wherein the arithmetic average roughness Ra1 ′ of the surface of the first region A1 ′ and the arithmetic average roughness Ra2 ′ of the surface of the second region A2 ′ are: The relationship of Ra1 '>Ra2' is satisfied, and the transfer layer has at least an antireflection layer, a protective layer, and an adhesive layer from the release sheet side, and the antireflection layer is a single layer of a low refractive index layer. The structure satisfies the following condition 1.
<Condition 1>
After bonding the transfer layer side surface of the transfer sheet to a black plate, the release sheet is peeled off, and a sample B is prepared by transferring the transfer layer onto the black plate. When the sample B is viewed from the transfer layer side in a plan view, a portion corresponding to the first region A1 ′ is a first region A1, and a portion corresponding to the second region A2 ′ is a second region A2. When the spectral reflectance of the first region A1 and the second region A2 at the wavelength x (nm) measured from the transfer layer side of the sample B is S1 (%) and S2 (%), respectively, The minimum value of S2 in the region of 380 to 780 nm is 0.60% or more and 1.50% or less, and the average of | S1-S2 | in the region of 540 to 570 nm is 1.00% or less.

FIG. 7 is a cross-sectional view showing one embodiment of the transfer sheet 100 of the present invention.
The transfer sheet 100 shown in FIG. 7 has a transfer layer 50 on a release sheet 70. The release sheet 70 includes a support 71 and a resin layer 72, and the surface of the release sheet 10 on the side in contact with the transfer layer 50 has a first area A1 ′ and a second area A1 ′ adjacent to the first area A1 ′. And an area A2 '. Further, the transfer layer 50 has an antireflection layer 10, a protective layer 20, an anchor coat layer 30, and an adhesive layer 40 from the release sheet side.

<Release sheet>
The release sheet has a first region A1 'and a second region A2' adjacent to the first region when viewed from above from the side in contact with the transfer layer. The arithmetic average roughness Ra1 'of the surface of the first area A1' of the release sheet and the arithmetic average roughness Ra2 'of the surface of the second area A2' satisfy the relationship of Ra1 '>Ra2'.

  The release sheet is peeled after transferring the transfer layer to an adherend such as a resin molding, and a shape complementary to the surface shape of the release sheet is formed on the surface of the transfer layer. That is, the surface shapes of the first region A1 'and the second region A2' of the release sheet are complementary to the surface shapes of the first region A1 and the second region A2 of the decorative molded product. In addition, although the surface irregularities of the release sheet and the surface irregularities of the decorative molded product are reversed in sign, the arithmetic mean roughness Ra is the same. That is, Ra1 'and Ra2' of the release sheet correspond to Ra1 and Ra2 of the decorative molded product. Therefore, the preferred ranges of Ra1 'and Ra2' are the same as the preferred ranges of Ra1 and Ra2.

The release sheet 70 is formed from the support 11 and the resin layer 12, for example, as shown in FIG. Of course, the release sheet may be a single layer of a support or a single layer of a resin layer, or may have a configuration of three or more layers having layers other than the support and the resin layer.
Although not shown, the release sheet preferably has a release layer on the transfer layer side surface.

<< Support >>
Examples of the support constituting the release sheet include polyolefin-based resins such as polyethylene and polypropylene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, and vinyl-based resins such as ethylene-vinyl acetate copolymer and ethylene-vinyl alcohol copolymer. Resins, polyester resins such as polyethylene terephthalate, polyethylene naphthalate, and polybutylene terephthalate; acrylic resins such as poly (methyl) acrylate and ethyl poly (meth) acrylate; styrene resins such as polystyrene; nylon 6 or nylon And a plastic film made of a resin such as a polyamide resin represented by No. 66 or the like.
Among these plastic films, a biaxially stretched polyester film which is excellent in heat resistance and dimensional stability and excellent in the suitability for alignment at the time of transfer is preferable.

The thickness of the support is preferably from 12 to 150 μm, more preferably from 25 to 100 μm, from the viewpoints of moldability, shape followability, and handling.
Further, the surface of the support may be subjected to an easy-adhesion treatment in advance in order to enhance the adhesion to the resin layer or the like.

  When the release sheet is formed of a single layer of the support, the surface of the support may be shaped using a plate having a shape complementary to the first area A1 'and the second area A2'.

<< Resin layer >>
The resin layer preferably contains a resin component such as a thermoplastic resin, a cured product of a thermosetting resin composition, or a cured product of an ionizing radiation-curable resin composition as a main component. In addition, a main component means 50 mass% or more of the total solid content which comprises a resin layer, It is preferable that this ratio is 70 mass% or more, More preferably, it is 90 mass% or more.
Among the above-mentioned resin components, a cured product of an ionizing radiation-curable resin composition which is excellent in strength and can be given an accurate and precise shape because it cures instantaneously is preferable. Further, from the viewpoint of easily obtaining the effect of the ionizing radiation-curable resin composition, it is preferable that the cured product of the ionizing radiation-curable resin composition is contained in an amount of 70% by mass or more, out of all the resin components constituting the resin layer. More preferably, the content is at least 95% by mass, even more preferably at least 95% by mass, even more preferably at least 100% by mass.

  The resin layer may be formed by applying a coating solution containing particles and a binder resin. However, from the viewpoint of forming an accurate and precise shape, the resin layer is complementary to the first region A1 ′ and the second region A2 ′. It is preferable to form it by printing using a plate having various shapes. The details of the method for forming the resin layer using the plate will be described later.

  The embodiment of the thermosetting resin composition and the ionizing radiation-curable resin composition of the resin layer is the same as the embodiment of the thermosetting resin composition and the ionizing radiation-curable resin composition of the protective layer described above. .

  The thickness of the resin layer is not particularly limited, but is preferably 1 to 15 μm, and more preferably 2 to 12 μm.

  From the viewpoint of improving the releasability between the release sheet and the transfer layer, it is preferable that the resin layer contains substantially no particles. Specifically, the content of the particles in the resin layer is preferably less than 1% by mass, more preferably less than 0.1% by mass, even more preferably less than 0.01% by mass, Even more preferably, it is 0% by mass.

The interface between the release sheet and the transfer layer is formed so as to be peelable when it comes into close contact with the transfer target.
In order to improve the releasability, the release sheet preferably has a release layer on at least a part of the surface in contact with the transfer layer. Further, from the viewpoint of uniforming the releasability in the surface of the transfer sheet, the release sheet preferably has a release layer on the entire surface in contact with the transfer layer.
In addition, since the release layer is formed on the uneven surface of the release sheet, it is possible to transfer an uneven shape having a low frequency component to the surface of the adherend, thereby suppressing whitening and glare of the decorative molded product. Can be easier.

The release layer is preferably mainly composed of a resin.
The resin of the release layer is not particularly limited as long as it has a predetermined coating strength and a low adhesive strength to the transfer layer, and is generally a thermoplastic resin, a cured product of a thermosetting resin composition, ionizing radiation. A cured product of the curable resin composition may be used. Specifically, fluorine resin, silicone resin, acrylic resin, polyester resin, polyolefin resin, polystyrene resin, polyurethane resin, cellulose resin, vinyl chloride-vinyl acetate copolymer resin, nitrified cotton And the like.
Among these, a cured product of a thermosetting resin composition is preferable, and a thermosetting resin composition containing an acrylic polyol and an isocyanate is more preferable.

  The release layer may further include a release agent for improving the release property. Examples of the release agent include waxes such as synthetic wax and natural washes. As the synthetic wax, polyolefin wax such as polyethylene wax and polypropylene wax is preferable.

The thickness of the release layer is preferably from 0.1 to 5.0 μm, more preferably from 0.2 to 1.5 μm, even more preferably from 0.3 to 1.0 μm.
The thickness of the release layer is determined, for example, by taking a cross-sectional photograph of a cross section obtained by cutting a central portion of the release sheet in the vertical direction, and measuring the thickness of the release layer from the cross-sectional photograph at at least 20 points at 500 μm intervals. It can be calculated as a value.

The release sheet may have another layer.
Other layers include an antistatic layer. By having the antistatic layer, peeling charging at the time of peeling the release sheet can be suppressed, and transfer workability can be improved.

<< Production method of release sheet >>
The release sheet can be manufactured, for example, by the following steps (A1) to (A2).
(A1) A step of applying a coating liquid for forming a resin layer containing an ionizing radiation-curable resin composition on a support to form a layer containing the ionizing radiation-curable resin composition.
(A2) Using a plate having a shape complementary to the first region A1 ′ and the second region A2 ′, simultaneously forming the uncured resin layer and irradiating with ionizing radiation to form the formed resin layer. Step of curing.

When the ionizing radiation-curable resin composition contains a solvent, the solvent is preferably dried in step (A1).
When the release sheet has a release layer, the step (A3) of forming a release layer on the resin layer may be performed after the step (A2).

  When the release sheet has other regions, a plate having a shape complementary to the first region A1 ', the second region A2', and the other regions may be used as the plate for the step (A2).

The plate used in the step (A2) can be obtained by engraving the surface of the cylinder into a desired shape by, for example, etching, sandblasting, cutting and laser processing, or a combination thereof. Alternatively, a long male plate (a plate having the same shape as the first area A1 ′ and the second area A2 ′) is prepared by laser engraving, stereolithography, or the like, and the inverted one is formed on the surface of the cylinder. It can be obtained by winding.
The surface of the plate used in the step (A2) is preferably subjected to hard plating with chromium or the like.

  In the case where another layer such as a release layer is formed on the resin layer, the surface irregularities of the release sheet are alleviated more than the surface irregularities of the resin layer. Therefore, when another layer is formed on the resin layer, the plate used in the step (A2) may be a plate having a shape in which unevenness is reduced.

Further, the release sheet can also be manufactured, for example, by the following steps (B1) and (B2).
(B1) A step of filling a coating having a shape complementary to the first area A1 ′ and the second area A2 ′ with a coating liquid for forming a resin layer.
(B2) a step of transferring the coating solution for forming a resin layer filled in the plate onto a support, and drying and curing as necessary to form a resin layer.

  From the viewpoint of forming an accurate and precise shape, the steps (A1) to (A2) described above are preferable.

A transfer layer is formed on the release sheet.
The transfer layer 50 is a layer to be transferred to the adherend, and is formed so as to cover the entire surface of the release sheet 70, for example, as shown in FIG. The transfer layer 50 includes an antireflection layer 10, a protective layer 20, an anchor coat layer 30, and an adhesive layer 40 in this order from the side close to the release sheet 70, as shown in FIG. 7, for example.

  The embodiment of each layer (antireflection layer, protective layer, anchor coat layer and adhesive layer) constituting the transfer layer of the transfer sheet is the same as the embodiment of each layer constituting the transfer layer of the decorative molded article described above. It is.

<Condition 1>
Condition 1 is that the spectral reflectances of the first region A1 and the second region A2 at a wavelength x (nm) measured from the transfer layer side of the sample B are S1 (%) and S2 (%), respectively. When the minimum value of S2 in the wavelength range of 380 to 780 nm is 0.60% or more and 1.50% or less, and the average of | S1-S2 | in the wavelength range of 540 to 570 nm is 1.00% or less. Stipulates that

  The technical idea of defining the range of the minimum value of S2 and the average value of | S1−S2 | in the condition 1 of the transfer sheet of the present invention is that the decorative sheet of the present invention described above has the minimum value of S2 and | S1-S2. This is the same as the technical idea for defining the range of the average value of |.

  Under the condition 1, the sample B produced when measuring the spectral reflectivity has a refraction between a black plate and a layer (for example, an adhesive layer constituting a transfer layer) which is in close contact with the black plate in order to suppress back reflection. Preferably, the rate difference is within 0.05.

  It is preferable that the spectral reflectance and the reflectance Y value of the sample B manufactured from the transfer sheet are in the same ranges as the above-described suitable ranges of the spectral reflectance and the reflectance Y value of the decorative molded product. For example, in sample B, it is preferable that | S1−S2 | is 1.50% or less over the entire wavelength range of 380 to 780 nm. | ΔSmax−ΔSmin | of sample B is preferably 1.70% or less.

[Production method of decorative molded products]
The method for producing a decorative molded article of the present invention includes the steps of transferring the transfer layer of the transfer sheet of the present invention to an adherend, and removing the release sheet of the transfer sheet.
Examples of the adherend include a resin molded body.

  A known transfer method can be used as a method for manufacturing the decorative molded product. For example, (i) a method in which a transfer sheet is attached to a preformed adherend, a transfer layer of the transfer sheet is transferred, and then a release sheet of the transfer sheet is peeled off; After attaching the transfer sheet to the attached body and transferring the transfer layer of the transfer sheet, the release sheet of the transfer sheet is peeled off, and then the adherend on which the transfer layer is laminated is formed into a non-flat shape. And (iii) a method in which an adherend is integrated with a transfer sheet during injection molding, and then a release sheet of the transfer sheet is peeled off [in-mold molding (injection molding simultaneous transfer decoration method)] and the like. Can be Among them, in-mold molding (injection molding simultaneous transfer decoration method) is preferable in that it is easy to decorate and mold a resin molded body having a complicated surface shape such as a three-dimensional curved surface.

As one embodiment of a method of manufacturing a decorative molded product using the transfer sheet of the present invention by in-mold molding,
(Z1) a step of disposing the transfer layer side of the transfer sheet toward the inside of the in-mold molding die;
(Z2) a step of injecting a resin into the in-mold molding die;
(Z3) a step of integrating the transfer sheet and the resin and transferring a transfer layer of the transfer sheet onto a surface of a resin molded body (adherend);
(Z4) a step of removing the release sheet of the transfer sheet after removing the resin molded body (adherend) from the mold.

[Image display device]
The image display device of the present invention has the decorative molded product of the present invention described above on a display element, and is arranged such that the surface of the decorative molded product on the adherend side faces the display element side. It is made.

  Examples of the display element include a liquid crystal display element, an EL (inorganic EL, organic EL) display element, a plasma display element, and an LED display element (such as a micro LED). Note that the liquid crystal display element may be an in-cell touch panel liquid crystal display element having a touch panel function in the element.

  When the display element of the display device is a liquid crystal display element, a backlight is required on the surface of the liquid crystal display element opposite to the decorative molded product.

  Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples. The present invention is not limited to the embodiments described in the embodiments.

1. Measurement and evaluation The following measurements and evaluations were performed on the decorative molded products obtained in Examples and Comparative Examples. The atmosphere for the measurement and evaluation was a temperature of 23 ° C. ± 5 ° C. and a humidity of 40 to 65%. The measurement and evaluation were performed after exposing the target sample to the atmosphere for 30 minutes or more.

1-1. Measurement of Spectral Reflectance and Reflectance Y Value A sample A was prepared in which a black plate was disposed on the adherend side (polycarbonate plate side) of the decorative molded product obtained in each of Examples and Comparative Examples via an adhesive layer. From the transfer layer side of Sample A, the spectral reflectance S1 (%) of the first region A1 at a wavelength of 380 to 780 nm and the spectral reflectance S2 (%) of the second region A2 at a wavelength of 380 to 780 nm were measured. From the obtained spectral reflectances, R1 (%), which is the reflectance Y value of the first area A1, and R2 (%), which is the reflectance Y value of the second area A2, were calculated. The measuring device used was an ultraviolet-visible spectrophotometer (trade name: V-670) manufactured by JASCO Corporation and an automatic absolute reflectance measuring unit attached to the spectrophotometer. The measuring conditions were a wavelength interval of 1 nm and an incident angle of 5 degrees. The specular reflectance was measured. In the calculation, the observation conditions were set to a viewing angle of 2 degrees and a C light source using color evaluation software attached to the above-described spectrophotometer.
Table 1 shows the minimum value of S2 at a wavelength of 380 to 780 nm of the decorative molded products of Examples and Comparative Examples.
Table 1 shows the average of | S1−S2 | of the decorative molded products of Examples and Comparative Examples in the wavelength range of 540 to 570 nm.
Further, FIG. 5 shows S1-S2 (%) at a wavelength of 380 to 780 nm of the decorative molded product of the example, and FIG. 6 shows S1-S2 (%) of the decorative molded product of the comparative example at a wavelength of 380 to 780 nm. Further, Table 1 shows the maximum value of | S1−S2 | in the entire wavelength range of 380 to 780 nm.
Table 1 shows | ΔSmax−ΔSmin | (%) of the decorative molded products of the examples and the comparative examples.
Table 1 shows the variation (%) of S1 at a wavelength of 380 to 780 nm.
Table 1 shows R1 (%) and R2 (%) of Examples and Comparative Examples.

1-2. Arithmetic mean roughness Ra
Using a surface roughness measuring device (model number: ET-4000L / manufactured by Kosaka Laboratories Co., Ltd.), under the following measurement conditions, the surface of the first area A1 of the decorative molded product obtained in the example and the comparative example was obtained. The arithmetic average roughness Ra1 and the arithmetic average roughness Ra2 of the surface of the second region A2 were measured. The arithmetic average roughness Ra was measured according to JIS B0601: 1994, with a cutoff value (λc) of 0.8 mm.
[Stylus of surface roughness detector]
ET1480 (trade name, radius of curvature: 0.5 μm, material: diamond) manufactured by Kosaka Laboratory Co., Ltd.
[Measurement conditions of surface roughness measuring instrument]
・ Reference length (cutoff value λc of roughness curve): 0.8 mm
Evaluation length (reference length (cut-off value λc) × 5): 4.0 mm
・ Feeding speed of stylus: 0.1mm / s
・ Spare length: (cutoff value λc) × 1
-Vertical magnification: 10000 times-Horizontal magnification: 100 times-Filter characteristics: Gaussian-Leveling: None-λs filter: None

1-3. Difference in color between the first area A1 and the second area A2 The first area A1 and the second area A2 are tilted under the illumination of a fluorescent lamp while the decorative molded products obtained in Examples and Comparative Examples are tilted at various angles. It was visually evaluated whether or not a difference in tint from the region A2 was felt. The evaluators were a total of 40 evaluators, five for each gender, from the four ages of their twenties, thirties, forties, and fifties.
Three points where the difference in tint between the first area A1 and the second area A2 is hard to be perceived, two points where it is difficult to judge both, and a difference in tint between the first area A1 and the second area A2 are easily perceived. The score was taken as 1 point, and the average score of the above 40 evaluations was calculated and ranked according to the following scores.
<Evaluation criteria>
A: Average point is 2.5 or more B: Average point is 2.0 or more and less than 2.5 C: Average point is less than 2.0

1-4. Anti-reflection property At the time of the evaluation of the above 1-3, it was evaluated whether or not the reflected light of the fluorescent lamp was worrisome. The evaluators were the same 40 as above.
Calculating the average score of the above 40 evaluations, with 3 points where the reflected light of the fluorescent lamp is not annoying, 2 points where the reflected light is not bothersome and 1 point where the reflected light of the fluorescent lamp is anxious, Was ranked.
<Evaluation criteria>
A: Average point is 2.5 or more B: Average point is 2.0 or more and less than 2.5 C: Average point is less than 2.0

2. Preparation of Plate A cylinder having a copper plating layer having a thickness of 200 μm was prepared, and the entire surface of the cylinder was covered with a mask in which a portion forming the first region A ′ of the release sheet was punched. Next, by blasting using glass beads, irregularities were formed in portions not covered with the mask. Next, the mask was removed, and the surface of the cylinder was subjected to hard plating (chrome plating) to obtain a plate.

3. Preparation of Release Sheet A 50 μm-thick polyethylene terephthalate film was coated with a resin layer-forming coating solution having the following formulation and dried to form a 5.0 μm-thick uncured resin layer.
<Coating liquid for resin layer formation>
-UV curable resin composition solution (manufactured by Kyoeisha Chemical Co., Ltd., trade name: DCD-01-60ME, resin composition: 40% by mass, methyl ethyl ketone solution, containing a photopolymerization initiator)

Next, using the plate prepared in the above “2”, simultaneously forming the uncured resin layer, simultaneously irradiating ionizing radiation from the polyethylene terephthalate film side to cure the formed resin layer, To form a resin layer.
Next, a coating liquid for forming a release layer having the following formulation was applied to the entire surface and dried to form a release layer having a thickness of 0.5 μm, thereby obtaining a release sheet. The release sheet had a first area A1 'and a second area A2' adjacent to the first area when viewed in plan from the side in contact with the transfer layer.

<Coating solution for forming release layer>
・ 70 parts by mass of acrylic polyol (manufactured by Soken Chemical Co., Ltd., trade name: Thermolac SU100A)
・ 25 parts by mass of isocyanate (Mitsui Chemicals, trade name: Takenate D-110N)
・ 161 parts by mass of ethyl acetate ・ 56 parts by mass of methyl isobutyl ketone

4. Production of transfer sheet, production of decorative molded product 4-1. Example 1
The coating liquid 1 for forming a low-refractive-index layer having the following formulation is applied onto the release sheet obtained in the above “3”, dried, and then irradiated with ultraviolet rays to have a low refractive index of 80 nm in thickness and a refractive index of 1.36. A rate layer was formed.
<Coating liquid 1 for forming low refractive index layer>
・ 7 parts by mass of photopolymerization initiator (trade name “Irgacure127” manufactured by BASF)
-UV curable resin 75 parts by mass (Shin-Nakamura Chemical Co., Ltd., trade name "ATM-4P")
-UV curable resin 25 parts by mass (Nippon Kayaku Co., Ltd., trade name "PET-30")
・ 700 parts by mass of hollow silica fine particle dispersion (solid content: 20%, average primary particle diameter: 60 nm)
-Reactive silica fine particle dispersion liquid 83 parts by mass (trade name "MIBK-SD" manufactured by Nissan Chemical Industries, Ltd., solid content 30%, average primary particle diameter 10 nm)
9300 parts by mass of methyl isobutyl ketone 1100 parts by mass of propylene glycol monomethyl ether acetate

Then, a coating liquid 1 for forming a protective layer having the following formulation was applied on the low refractive index layer so that the adhesion amount after drying was 4.4 g / m ² (4.0 μm), and a coating film was formed. Using a fusion UV lamp system, the light source was irradiated under the conditions of an H bulb, a transfer speed of 20 m / min, and an output of 40%, so that the protective layer was semi-cured. The integrated light amount at this time was measured by an illuminometer (trade name: UVPF-A1) manufactured by Eye Graphics Co., and was found to be 15 mJ / m ² . The refractive index of the protective layer was 1.52.
<Coating liquid 1 for forming protective layer>
-70 parts by mass of a urethane acrylate-based ultraviolet curable resin composition (trade name: Seika Beam HT-X, manufactured by Dainichi Seika)
(Solid content 35% by mass, mixed solvent of toluene / ethyl acetate)
-30 parts by mass of a urethane acrylate-based ultraviolet-curable resin composition (trade name: Seika Beam EXF-HT-1 manufactured by Dainichi Seika)
(Solid content 40% by mass, toluene / methyl ethyl ketone mixed solvent)

Next, a coating liquid 1 for forming an anchor coat layer having the following formulation is applied on the protective layer so that the adhesion amount after drying is 3.0 g / m ^2. After forming a coating film, the coating liquid is dried at 40 ° C. for 72 hours. And cured to form an anchor coat layer having a thickness of 2 μm. The refractive index of the anchor coat layer was 1.50.
<Coating solution 1 for forming anchor coat layer>
100 parts by mass of acrylic polyol (manufactured by Dainichi Seika Co., Ltd., trade name: TM-VMAC, solid content 25% by mass)
(Toluene / ethyl acetate / methyl ethyl ketone mixed solvent)
-Hexamethylene diisocyanate 10 parts by mass (trade name: PTC-RC3, manufactured by Dainichi Seika)
(Solid content 75 mass%, solvent: ethyl acetate)

Next, a coating liquid 1 for forming an adhesive layer having the following formulation was applied onto the anchor coat layer so that the adhesion amount after drying was 2.5 g / m ² to form a coating film. The coating film was dried to form a heat-sealing adhesive layer having a thickness of 2 μm to obtain a transfer sheet of Example 1. The refractive index of the adhesive layer was 1.49.
<Coating liquid 1 for forming adhesive layer>
-465 parts by mass of thermoplastic resin (manufactured by Dainichi Seika Co., Ltd., trade name: TM-R600, solid content 20% by mass)
・ Methyl ethyl ketone 40 parts by mass

The surface of the obtained transfer sheet on the transfer layer side was overlaid on a transparent polycarbonate plate (refractive index: 1.59) having a thickness of 2 mm, and the transfer sheet was heated and transferred from the support side. Next, after releasing the release sheet from the transfer sheet, the protective layer is completely cured by irradiating ultraviolet rays (atmosphere, H valve, 800 mJ / cm ² ) from the transfer layer side, and the decorative molded article of Example 1 is obtained. Obtained.

4-2. Example 2
The coating liquid 1 for forming a low refractive index layer, the coating liquid 1 for forming a protective layer, the coating liquid 1 for forming an anchor coat layer, and the coating liquid 1 for forming an adhesive layer of Example 1 were used for forming the low refractive index layer described below. The coating liquid 2, the coating liquid 2 for forming the protective layer, the coating liquid 2 for forming the anchor coat layer, and the coating liquid 2 for forming the adhesive layer were changed to a low refractive index layer, a protective layer, an anchor coat layer, and an adhesive layer. A transfer sheet and a decorative molded product of Example 2 were obtained in the same manner as in Example 1 except that the refractive index was changed to the value shown in Table 1.

<Coating liquid 2 for forming low refractive index layer>
・ 7 parts by mass of photopolymerization initiator (trade name “Irgacure127” manufactured by BASF)
-UV curable resin 75 parts by mass (Shin-Nakamura Chemical Co., Ltd., trade name "ATM-4P")
-UV curable resin 25 parts by mass (Nippon Kayaku Co., Ltd., trade name "PET-30")
・ 600 parts by mass of hollow silica fine particle dispersion (solid content 20%, average primary particle diameter 60 nm)
-Reactive silica fine particle dispersion liquid 83 parts by mass (trade name "MIBK-SD" manufactured by Nissan Chemical Industries, Ltd., solid content 30%, average primary particle diameter 10 nm)
9300 parts by mass of methyl isobutyl ketone 1100 parts by mass of methyl ether acetate of propylene glycol <Coating solution 2 for forming protective layer>
・ 3 parts by mass of photopolymerization initiator (manufactured by BASF, trade name “Irgacure184”)
-160 parts by mass of ultraviolet curable resin (trade name "8DK-2030", manufactured by Taisei Fine Chemical Co., Ltd.)
-UV curable resin 25 parts by mass (Nippon Kayaku Co., Ltd., trade name "PET-30")
<Coating liquid 2 for forming anchor coat layer>
・ 100 parts by mass of polyester urethane resin (trade name “TM-REX (NUV-60) clear” manufactured by Dainichi Seika Industry Co., Ltd.)
・ 5 parts by weight of curing agent (trade name “Lamic B Hardener” manufactured by Dainichi Seika Kogyo Co.
<Coating liquid 2 for forming adhesive layer>
・ 100 parts by mass of thermoplastic resin (resin composition 40% by mass, methyl ethyl ketone solution)

4-3. Example 3
The coating liquid 1 for forming an anchor coat layer and the coating liquid 1 for forming an adhesive layer in Example 1 were changed to the coating liquid 3 for forming an anchor coat layer and the coating liquid 2 for forming an adhesive layer described below. A transfer sheet and a decorative molded product of Example 3 were obtained in the same manner as in Example 1 except that the refractive indices of the layer and the adhesive layer were changed to the values shown in Table 1.

<Coating solution 3 for forming anchor coat layer>
Acrylic resin 100 parts by mass (trade name “TM-REX SS TC Primer” manufactured by Dainichi Seika Kogyo Co., Ltd.)
・ 5 parts by mass of curing agent (trade name “VM-D curing agent” manufactured by Dainichi Seika Industry Co., Ltd.)

4-4. Example 4
In the same manner as in Example 1 except that the adhesive layer forming coating liquid 1 of Example 1 was changed to the adhesive layer forming coating liquid 2 and the refractive index of the adhesive layer was changed to the value shown in Table 1. Thus, a transfer sheet and a decorative molded product of Example 4 were obtained.

4-5. Example 5
A transfer sheet and a decorative molded product of Example 5 were obtained in the same manner as in Example 4, except that the thickness of the low refractive index layer was changed to 120 nm.

4-5. Comparative Example 1
A transfer sheet and a decorative molded product of Comparative Example 1 were obtained in the same manner as in Example 2 except that a high refractive index layer was formed between the low refractive index layer and the protective layer. The high-refractive-index layer is formed by applying a high-refractive-index-layer-forming coating liquid 1 having the following formulation, drying the coating solution, and then irradiating the coating with ultraviolet light, and has a thickness of 100 nm and a refractive index of 1.63.
<Coating liquid 1 for forming high refractive index layer>
-100 parts by mass of propylene oxide-modified pentaerythritol tetraacrylate (trade name "ATM-4P", manufactured by Shin-Nakamura Chemical Co., Ltd., solid content 100%)
988 parts by mass of antimony pentoxide-containing dispersion (trade name “V-4564”, manufactured by JGC Catalysts and Chemicals, solids content 40.5%, average primary particle diameter 20 nm)
・ 300 parts by mass of a fluorine-based leveling agent (trade name “MegaFac F568”, manufactured by DIC, solid content 5%)
-8 parts by mass of photopolymerization initiator (trade name "Irgacure 127", manufactured by Ciba Specialty Chemicals)
6800 parts by mass of methyl isobutyl ketone 6500 parts by mass of propylene glycol monomethyl ether acetate

4-5. Comparative Example 2
The transfer sheet and the decorative molded article of Comparative Example 2 were formed in the same manner as in Example 1 except that the protective layer, the anchor coat layer, and the adhesive layer were sequentially formed on the release sheet without forming the low refractive index layer. I got

4-6. Comparative Example 3
A transfer sheet and a decorative molded product of Comparative Example 3 were obtained in the same manner as in Example 3, except that a high refractive index layer was formed between the low refractive index layer and the protective layer. The high-refractive-index layer is formed by applying the coating liquid 1 for forming a high-refractive-index layer having the above-mentioned formula, drying the coating liquid, and irradiating with ultraviolet rays, and has a thickness of 100 nm and a refractive index of 1.63.

4-7. Comparative Example 4
A transfer sheet and a decorative molded product of Comparative Example 4 were obtained in the same manner as in Example 1 except that a high refractive index layer was formed between the low refractive index layer and the protective layer. The high-refractive-index layer is formed by applying the coating liquid 1 for forming a high-refractive-index layer having the above-mentioned formula, drying the coating liquid, and irradiating with ultraviolet rays, and has a thickness of 100 nm and a refractive index of 1.63.

  From the results shown in Table 1, it can be confirmed that the decorative molded products of Examples 1 to 5 can suppress the difference in tint of the regions having different textures while improving the antireflection property.

10: Anti-reflection layer 10a: Low refractive index layer 20: Protective layer 30: Anchor coat layer 40: Adhesive layer 50: Transfer layer 70: Release sheet 71: Supporting body 72: Resin layer 100: Transfer sheet 200: Adhering Body 300: Decorative molded product

Claims (7)

A decorative molded article having a transfer layer on an adherend,
The decorative molded product has a first region A1 and a second region A2 adjacent to the first region when viewed from above from the transfer layer side,
The arithmetic average roughness Ra1 of the surface of the first region A1 and the arithmetic average roughness Ra2 of the surface of the second region A2 satisfy a relationship of Ra1> Ra2,
The transfer layer has at least an adhesive layer, a protective layer and an antireflection layer from the adherend side,
When the spectral reflectances of the first region A1 and the second region A2 at a wavelength x (nm) measured from the transfer layer side of the decorative molded product are S1 (%) and S2 (%), respectively. The minimum value of S2 in the wavelength range of 380 to 780 nm is 0.60% to 1.50%, and the average of | S1-S2 | in the wavelength range of 540 to 570 nm is 1.00% or less. , Decorative molded products.   The decorative molded product according to claim 1, wherein | S1-S2 | is 1.50% or less over the entire wavelength range of 380 to 780 nm.   When the maximum value of S1-S2 is ΔSmax (%) and the minimum value of S1-S2 is ΔSmin (%) in the wavelength range of 380 to 780 nm, | ΔSmax−ΔSmin | is 1.70% or less. The decorative molded product according to claim 1 or 2.   When the reflectance Y values of the first region A1 and the second region A2 measured from the transfer layer side of the decorative molded product are R1 (%) and R2 (%), respectively, R1 and R2 are The decorative molded product according to any one of claims 1 to 3, wherein each is 2.0 (%) or less.   The decorative molded product according to any one of claims 1 to 4, which is used as a front plate of a display element. A transfer sheet having a transfer layer on a release sheet,
The release sheet has a first region A1 ′ and a second region A2 ′ adjacent to the first region when viewed from above from the side in contact with the transfer layer,
The arithmetic average roughness Ra1 ′ of the surface of the first region A1 ′ and the arithmetic average roughness Ra2 ′ of the surface of the second region A2 ′ satisfy a relationship of Ra1 ′> Ra2 ′,
The transfer layer has at least an antireflection layer, a protective layer, and an adhesive layer from the release sheet side,
The antireflection layer has a single-layer structure of a low refractive index layer,
A transfer sheet that satisfies the following condition 1:
<Condition 1>
After attaching the transfer layer side surface of the transfer sheet to a black plate, the release sheet is peeled off, and a sample B is formed by transferring the transfer layer onto the black plate. When the sample B is viewed from the transfer layer side in a plan view, a portion corresponding to the first region A1 ′ is a first region A1, and a portion corresponding to the second region A2 ′ is a second region A2. When the spectral reflectances of the first region A1 and the second region A2 at the wavelength x (nm) measured from the transfer layer side of the sample B are S1 (%) and S2 (%), respectively, The minimum value of S2 in the region of 380 to 780 nm is 0.60% or more and 1.50% or less, and the average of | S1-S2 | in the region of 540 to 570 nm is 1.00% or less.   It has the decorative molded product of any one of Claims 1-5 on a display element, It arrange | positions so that the surface of the said adherend side of the decorative molded product may face the display element side. An image display device.