JP6667854B1 - Decorative sheet for molding, method for producing the same, and decorative molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative sheet for molding which is excellent in visibility of a concavo-convex pattern and is excellent in moldability even without using a metallic luster such as a metal thin film, for example, even when combined with a white colored layer, a manufacturing method thereof, and a decorative sheet. Provide a decorative molded body. A decorative sheet for molding 1 according to the present invention is formed on a sheet-shaped transparent substrate 10 itself on a sheet-shaped transparent substrate 10 and a surface 12 of the sheet-shaped transparent substrate 10 opposite to a viewing side. Or the convex pattern 20 formed by using another transparent member on the sheet-shaped transparent substrate 10 and the surface on which the convex pattern 20 is provided are covered, and unevenness derived from the convex pattern 20 is generated. A transparent optical adjustment layer 30 formed on the surface and a colored layer 40 that covers the optical adjustment layer 30 are provided. The optical adjustment layer 30 has one or more first optical adjustment layers having a refractive index of 0.03 or more and a refractive index of 1.80 or less higher than the refractive index of the member forming the convex pattern 20. [Selection diagram] Fig. 1

Description

  The present invention relates to a decorative sheet for molding having a convex pattern and a method for producing the same. Further, the present invention relates to a decorative molded body formed using the decorative sheet for molding.

A decorative sheet having an uneven pattern is known as a decorative sheet. For example, a vapor-deposited laminated sheet in which a transparent vapor-deposited layer made of an inorganic compound such as ZnO and a semi-transparent vapor-deposited layer made of a metal such as Al are provided on the concave-convex pattern surface of a transparent synthetic resin film having a concave-convex pattern on the surface is proposed. (Patent Document 1). In addition, as a hairline-like decorative sheet, a laminated sheet in which a transparent protective layer, a transparent hairline layer, and a reflective layer having a metal thin film layer formed by a vacuum deposition method or the like are laminated on a base sheet has been proposed (Patented). Reference 2). Further, as a display body with a decorative pattern, a printed pattern layer formed by printing a predetermined pattern on the back surface of a transparent substrate, a reflection-enhancing film layer made of a metal oxide such as TiO ₂ by a vacuum evaporation method, and a coloring layer. Are laminated in this order, but a laminated sheet is disclosed (Patent Document 3).

  In addition, in order to provide a glittering decorative body having high designability and high brightness, in which a high-luminance portion moves in accordance with the viewing angle, a plurality of blocks including convex transparent protrusions are formed on a transparent base material surface. There has been proposed a glittering decorative body further provided with a light reflecting layer covering the same (Patent Document 4). Further, as a decorative sheet having a large contrast between light and shadow, a decorative sheet using a light reflective convex portion and a black layer formed by using black ink has been proposed (Patent Document 5).

JP-A-6-305063 JP 2006-255894 A JP 2010-85508 A JP 2008-18631 A Patent No. 6405004

  2. Description of the Related Art A decorative sheet has been frequently used in recent years as a sheet for decorating the surface of a resin molded product such as a mobile information terminal device such as a smartphone, a home electric appliance, and an interior / exterior component of an automobile. Even if a metallic sheet such as a metal thin film is not used, for example, even when combined with a white layer, if it is possible to provide a decorative sheet which is excellent in the visibility of an uneven pattern and can be formed and processed, various kinds of automobile dashboards and the like can be provided. High designability can be imparted to the surface of the resin molded product.

  The present invention has been made in view of the above background, and does not use a metallic luster such as a metal thin film, for example, is excellent in visibility of an uneven pattern even when combined with a white colored layer, and is excellent in moldability. An object of the present invention is to provide a decorative sheet for molding, a method for producing the same, and a decorative molded article.

After extensive studies by the present inventors, they have found that the following aspects can solve the problems of the present invention, and have completed the present invention.
[1]: a sheet-shaped transparent substrate,
On the surface opposite to the viewing side of the sheet-shaped transparent substrate, a convex pattern formed on the sheet-shaped transparent substrate itself, or formed on the sheet-shaped transparent substrate using another transparent member. When,
A transparent optical adjustment layer that covers the surface on which the convex pattern is provided, and has irregularities derived from the convex pattern formed on its surface,
A colored layer that covers the optical adjustment layer,
The optical adjustment layer has one or more first optical adjustment layers having a refractive index greater than or equal to 0.03 or more than the refractive index of the member forming the convex pattern, and having a refractive index of 1.80 or less. Decorative sheet for molding.
[2] The decorative sheet for molding according to [1], wherein the first optical adjustment layer contains an organic binder.
[3]: The optical adjustment layer further includes a second optical adjustment layer having a refractive index smaller than the refractive index of the first optical adjustment layer by 0.01 or more and the refractive index is 1.35 or more. Or the decorative sheet for molding according to [1] or [2], having a plurality of layers, wherein at least one layer of the first optical adjustment layer is arranged between the convex pattern and the second optical adjustment layer.
[4]: The decorative sheet for molding according to [3], wherein the second optical adjustment layer contains an organic binder.
[5]: The decorative sheet for molding according to [3] or [4], wherein the optical adjustment layer includes a layer in which the first optical adjustment layer and the second optical adjustment layer are alternately laminated.
[6]: The decorative sheet for molding according to any one of [1] to [5], wherein the colored layer is an ink layer.
[7]: a step (A) of forming a convex pattern on the surface of the sheet-shaped transparent substrate opposite to the viewing side;
A step (B) of coating a surface provided with the convex pattern with a transparent optical adjustment layer so that irregularities derived from the convex pattern remain on the surface;
Covering the optical adjustment layer with a colored layer (C).
The step (A) includes a step of forming the convex pattern on the sheet-shaped transparent base material itself, or a step of forming the convex pattern using another transparent member on the sheet-shaped transparent base material. ,
In the step (B), one or more first optical adjustment layers having a refractive index of at least 0.03 or more and a refractive index of 1.80 or less than the refractive index of the member constituting the convex pattern are formed. A method for producing a decorative sheet for molding, the method comprising:
[8]: The method for producing a decorative sheet for molding according to [7], wherein the step (A) is any one of the steps (A-1) to (A-3).
(A-1) A step of pattern-printing a transparent ink on the surface of the sheet-shaped transparent substrate opposite to the viewing side to form the transparent convex pattern.
(A-2) a step of applying the transparent ink on the surface of the sheet-shaped transparent substrate opposite to the viewing side, and then forming the transparent convex pattern by embossing.
(A-3) a step of forming the transparent convex pattern on one surface of the sheet-like transparent substrate by embossing.
[9]: In the step (B), the second optical adjustment layer having a refractive index smaller than the refractive index of the first optical adjustment layer by 0.01 or more and the refractive index is 1.35 or more. Further comprising a step of forming one or more layers,
The method for producing a decorative sheet for molding according to [7] or [8], wherein at least one first optical adjustment layer is disposed between the convex pattern and the second optical adjustment layer.
[10] The method for producing a decorative sheet for molding according to [9], wherein the step (B) includes alternately laminating the first optical adjustment layer and the second optical adjustment layer.
[11]: A body to be decorated, and a decorative sheet for molding covering at least a part of the body to be decorated,
The decorative molded article, wherein the decorative sheet for molding is the sheet according to any one of [1] to [6].

  ADVANTAGE OF THE INVENTION According to this invention, even if it does not use metallic luster, such as a metal thin film, for example, even if it combines with a white coloring layer, it is excellent in the visibility of an uneven | corrugated pattern, and the decorative sheet for molding excellent in moldability, and its manufacture An excellent effect of providing a method and a decorative molded article is provided.

The typical sectional view showing an example of the decorative sheet for molding concerning a 1st embodiment. The typical sectional view showing an example of the decorative sheet for molding concerning a 2nd embodiment. The typical sectional view showing an example of the decorative sheet for molding concerning a 3rd embodiment. The typical sectional view showing an example of the decorative sheet for molding concerning a modification. The typical sectional view showing an example of the convex part pattern of the decorative sheet for molding concerning a modification. FIG. 3 is a schematic top view for explaining a sheet-shaped transparent base material and a pattern of a convex portion according to an example. FIG. 7 is a sectional view taken along line VII-VII of FIG. 6.

  Hereinafter, an example of an embodiment to which the present invention is applied will be described. The numerical values specified in the present specification are values obtained by the method disclosed in the embodiment or the example. Further, the numerical values “A to B” specified in this specification refer to a range that satisfies the numerical value A and a value larger than the numerical value A and the numerical value B and a value smaller than the numerical value B. Further, the sheet in the present specification includes not only a sheet defined in JIS but also a film or a plate. To make the description clear, the following description and drawings are simplified as appropriate. Various components appearing in the present specification may be each independently used alone or in combination of two or more, unless otherwise specified.

  The decorative sheet for molding of the present embodiment is a sheet on which a convex pattern is formed. Here, the convex pattern means a pattern formed by surface irregularities, and is synonymous with the concave and convex pattern. That is, this includes the case where the portion that visually constitutes the pattern is formed by the convex portion, the concave portion, and both. There is no particular limitation on the type of pattern in the convex pattern, and examples include a dot pattern, a hairline-like pattern, a geometric pattern, and a floral pattern. These patterns may be regular repeating patterns or irregularly formed patterns. In addition, the convex pattern includes a mode in which the convex pattern is formed in a partial region in addition to a mode in which the convex pattern is formed on the entire sheet-shaped transparent substrate. The convex pattern is formed on the sheet-like transparent base material itself on the surface opposite to the viewing side of the sheet-like transparent base material, and is formed using another transparent member on the sheet-like transparent base material. There is an aspect.

  The decorative sheet for molding further has at least an optical adjustment layer and a coloring layer. The optical adjustment layer is a transparent layer that covers the surface on which the convex pattern is provided, and has irregularities derived from the convex pattern formed on the surface. This optical adjustment layer is composed of a single layer or a plurality of layers. The coloring layer covers the optical adjustment layer. The optical adjustment layer has at least one or more first optical adjustment layers having a refractive index of at least 0.03 or more and a refractive index of 1.80 or less than the refractive index of the member constituting the convex pattern. In the decorative sheet for molding, a pattern having a high design property can be confirmed by visually recognizing the convex pattern through the sheet-like transparent substrate with the colored layer as a background.

  In the present specification, the term “transparent” is not particularly limited as long as it has transparency enough to allow the colored layer to be visually recognized when viewed from the sheet-shaped transparent base material side. In the film thickness, each member preferably has a total light transmittance of 80% or more in a visible light band of a wavelength of 400 to 800 nm. It is more preferably at least 85%, further preferably at least 90%, particularly preferably at least 95%. The sheet-shaped transparent substrate includes any of a film, a sheet, and a plate.

<First embodiment>
FIG. 1 shows a schematic sectional view of the decorative sheet for molding according to the first embodiment. As shown in the figure, the decorative sheet for molding 1 has a sheet-shaped transparent substrate 10 on which a convex pattern 20, an optical adjustment layer 30, and a coloring layer 40 are laminated in this order. The optical adjustment layer 30 has a first optical adjustment layer 31, a second optical adjustment layer 32, and a first optical adjustment layer 33 laminated in this order from the sheet-shaped transparent base material 10 side. Are formed on the surface. Here, as described above, the first optical adjustment layer has a refractive index of 0.03 or more larger than the refractive index of a transparent member constituting the convex pattern 20 and has a refractive index of 1.80 or less. A second optical adjustment layer refers to a layer that is transparent and has a refractive index smaller than the refractive index of the first optical adjustment layer by 0.01 or more, and has a refractive index of 1.35 or more. Say.

  The manufacturing method of the decorative sheet for molding according to the first embodiment is based on the step (A) of forming the convex pattern 20 on the surface of the sheet-shaped transparent base material 10 opposite to the viewing side, and the method is based on the convex pattern 20. Step (B) of coating the transparent optical adjustment layer 30 on the surface on which the convex pattern 20 is provided, and step (C) of coating the optical adjustment layer 30 with the colored layer 40 so that the irregularities to be formed remain on the surface. And In the first embodiment, the convex pattern 20 is formed on the sheet-like transparent substrate 10 using another transparent member. In the step (B), the first optical adjustment layer 31 is formed, and then the second optical adjustment layer 32 and the first optical adjustment layer 33 are laminated in this order.

[Sheet-shaped transparent substrate]
The sheet-shaped transparent substrate 10 has a function of transmitting light incident from the viewing side, transmitting light reflected inside the decorative sheet for molding 1 again, and emitting the light to the viewing side. It plays a role of supporting the adjustment layer 30 and the coloring layer 40. The refractive index of the sheet-shaped transparent substrate 10 is not particularly limited, but may be, for example, in the range of 1.45 to 1.75.

  The convex pattern 20 and the like are provided on the second surface 12 of the main surface opposite to the first surface 11, which is visible from the first surface 11 side which is the main surface of the sheet-shaped transparent substrate 10. As the sheet-like transparent base material 10, a transparent base material that can be formed by heating as described below is used. The thickness of the sheet-shaped transparent substrate 10 is not particularly limited as long as it can be formed, but may be, for example, 50 μm to 5 mm. As the sheet-shaped transparent substrate 10, a substrate formed from a composition containing a thermoplastic resin as a main component is suitably used.

  Specific examples of the thermoplastic resin, olefin resin such as polyethylene and polypropylene, polyethylene terephthalate resin, polyethylene naphthalate resin, polyester resin such as polybutylene terephthalate resin, polycarbonate resin, acrylate resin such as polymethyl methacrylate, polyamide resin, Examples thereof include a polyimide resin, a polyvinyl chloride resin, a polyvinylidene chloride resin, a polyvinyl alcohol resin, a polystyrene resin, and a polyacrylonitrile resin. Particularly, from the viewpoint of transparency and moldability, polyester having excellent solvent resistance, polycarbonate resin having excellent moldability, and polymethyl methacrylate having excellent hardness are preferred. The sheet-shaped transparent substrate 10 may be not only a single substrate but also a laminated substrate. For example, a PMMA / PC film in which polymethyl methacrylate (PMMA) is coextruded on polycarbonate (PC), a film in which a polycarbonate film and a polyester film are laminated with an adhesive, or the like may be used.

  The composition for forming the sheet-shaped transparent base material 10 includes, as necessary, an ultraviolet absorber, an ultraviolet stabilizer, a filler, a thixotropic agent, an antioxidant, as long as the effects of the present invention are not impaired. Antioxidants, antistatic agents, flame retardants, thermal conductivity improvers, plasticizers, sagging agents, antifouling agents, preservatives, disinfectants, defoamers, leveling agents, curing agents, thickeners, pigment dispersion Various additives such as an agent and a silane coupling agent may be further added.

[Protrusion pattern]
In the first embodiment, the convex pattern 20 is formed on the sheet-like transparent base material 10 using a transparent member. The convex pattern 20 includes reflected light in which external light transmitted through the sheet-shaped transparent base material 10 is reflected on the uneven surface formed by the convex pattern 20, and the external light is the surface of the optical adjustment layer 30 and the colored layer 40. The reflected light further reflected on the uneven surface formed by the convex pattern 20 is visually recognized by exiting from the first surface 11 side of the sheet-like transparent substrate 10. This transparent member can be formed from the same material as the sheet-like transparent substrate or from a different material.

  The cross-sectional shape of the convex pattern 20, that is, the cross-sectional shape in the short direction cut in a direction orthogonal to the surface of the decorative sheet for molding 1 is, for example, rectangular, trapezoidal, substantially semicircular, substantially semielliptical, or triangular. Can be exemplified. The shape of the corner portion of the convex pattern 20 may be an obtuse angle or an acute angle in addition to the R shape.

  The method for forming the convex pattern 20 is not particularly limited, and examples thereof include a printing method and an embossing method. As a material for forming the convex pattern 20, a thermoplastic resin, an actinic ray curable resin such as an ultraviolet ray or an electron beam, or a resin composition mainly containing a thermosetting resin is preferably used. As a preferable example of the resin, the same resin as the sheet-shaped transparent substrate can be exemplified. When a thermoplastic resin is used, a resin having a molding temperature higher than the softening point and lower than the melting temperature is used. In the case of an actinic ray-curable resin, a resin having a reactive functional group that is cured by actinic rays and additives such as a photopolymerization initiator and a sensitizer can be used as the composition. In the case of a thermosetting resin, a self-crosslinking resin having a reactive functional group that is cured by heat or a combination of a thermosetting resin and a curable compound can be used as the composition. Compositions containing photopolymerizable or thermopolymerizable monomers are also suitable. For example, a resin having a (meth) acryloyl group in a side chain and a monomer having a radical polymerizable double bond capable of crosslinking with the (meth) acryloyl group can be used. Examples of the monomer having a radical polymerizable double bond include (meth) acrylic monomers. The composition for forming the convex pattern 20 may further include various additives, for example, the additives exemplified for the sheet-shaped transparent base material, as necessary.

  In the printing method, the convex pattern 20 can be formed by preparing a transparent ink, pattern-printing the transparent ink on a sheet-like transparent substrate by, for example, screen printing, and performing a curing treatment as necessary. In the case of an ultraviolet curable type, an appropriate amount of ultraviolet light is irradiated, and in the case of a thermosetting type, an appropriate amount of heat is applied. At this stage, semi-curing may be performed, and substantially complete curing may be performed by a molding step described later.

  The embossing method prepares an ink, forms a coating film on the entire surface of the sheet-shaped transparent substrate with the ink, performs embossing on the obtained coating film, and after embossing or embossing as necessary. The convex pattern 20 can be formed by performing a curing treatment simultaneously with the pressing. The curing treatment can be performed in the same manner as in the printing method. When a thermosetting resin is used, a method of simultaneously performing a curing treatment by embossing as thermocompression bonding is efficient.

  The optimum average height of the convex pattern 20 varies depending on the design and the degree of molding, but is preferably 1 μm or more, more preferably 5 μm or more after molding, from the viewpoint of maintaining good visibility. On the other hand, in consideration of the productivity of the decorative sheet for molding, the upper limit of the average height of the convex pattern 20 is preferably 200 μm or less, more preferably 100 μm or less, before molding. When it is desired to increase the height of the convex pattern 20, an ultraviolet curable resin is preferable to a thermosetting resin. In addition, the average height of the convex pattern 20 means the height in the normal direction to the surface direction of the decorative sheet for molding 1 from the concave to the convex. The height is measured in accordance with JIS K5600-1-7.

  The width of the convex pattern 20 in the transverse direction in a sectional view can be set arbitrarily, but is preferably 20 μm or more, more preferably 50 μm or more, from the viewpoint of enhancing visibility. The upper limit of the width of the convex pattern 20 in a cross-sectional view varies depending on the product to which the decorative sheet is applied, but is preferably 10 mm or less, more preferably 5 mm or less when formed by screen printing. . Note that the width of the convex pattern 20 refers to the maximum width in a cross-sectional view. The width measurement can be performed using, for example, a digital microscope.

  From the viewpoint of improving the directivity of the convex pattern 20, the ratio of the height to the width in the short direction may be increased. This ratio can be easily adjusted by the viscosity of the ink when the projection pattern 20 is printed by screen printing or the like. The height and width can be adjusted by changing the emulsion thickness and the like of the screen plate.

  In the case of forming an uneven shape by embossing, a layer for forming the convex pattern 20 is applied, set at a temperature higher than the softening point of the resin of the coating layer and lower than the thermal decomposition temperature, For example, the convex pattern 20 can be formed by pressing for several seconds to several minutes.

[Optical adjustment layer]
In the first embodiment, the optical adjustment layer 30 is formed of a first optical adjustment layer 31 of a first layer, a second optical adjustment layer 32 of a second layer, and a first optical adjustment layer 33 of a third layer. And these layers are stacked in this order from the convex pattern 20 side.

  The first optical adjustment layer 31 of the first layer and the first optical adjustment layer 33 of the third layer have a refractive index larger than the refractive index of the member constituting the convex pattern 20 by 0.03 or more, and Is set to 1.80 or less, and in addition, by having an uneven shape derived from the convex pattern 20, the visibility of the convex pattern 20 can be effectively increased. The first optical adjustment layer 31 preferably contains an organic binder. By using an organic binder as the first optical adjustment layer, the adhesiveness between the convex pattern 20 and the sheet-shaped transparent substrate 10 can be increased as compared with an inorganic film made of an inorganic substance such as a metal oxide. For this reason, a decorative sheet for molding excellent in moldability can be provided.

  The second optical adjustment layer 32 of the second layer has a refractive index smaller than the refractive index of the first optical adjustment layer by 0.01 or more and the refractive index is 1.35 or more. By having the concavo-convex shape derived from the pattern 20, the visibility of the convex pattern 20 can be more effectively exhibited in cooperation with the first optical adjustment layer. The second optical adjustment layer preferably contains an organic binder.

  In other words, the three-layer structure of the optical adjustment layer 30 is formed by stacking a high refractive index layer, a low refractive index layer, and a high refractive index layer in this order. The terms “high” and “low” of the high refractive index and the low refractive index here indicate the relative magnitude relationship between the two refractive indices. The first optical adjustment layer is a high refractive index layer having a higher refractive index than the second optical adjustment layer, and the second optical adjustment layer is a low refractive index layer having a lower refractive index than the first optical adjustment layer. Although the value of the refractive index of both is not particularly limited, the refractive index of the first optical adjustment layer is preferably in the range of 1.55 to 1.8, and the second optical adjustment layer is 1.38 from the viewpoint of ease of design. The range of ~ 1.5 is preferred. By alternately laminating the first optical adjustment layer and the second optical adjustment layer, the visibility of the convex pattern 20 can be more effectively increased.

  The refractive index of the first optical adjustment layer and the second optical adjustment layer can be adjusted by an organic binder resin or by a refractive index adjuster such as an inorganic filler added to the organic binder resin. These refractive index adjusters are, for example, particles of about 2 to 100 nm so as not to hinder transparency. The content of the refractive index adjuster is preferably less than 80% by mass, more preferably 75% by mass or less, further preferably 70% by mass or less from the viewpoint of improving the moldability.

  Examples of the organic binder resin for the first optical adjustment layers 31 and 33 include, for example, polycarbonate resin, polyester resin such as polyethylene terephthalate, acrylic resin such as polymethyl methacrylate, polystyrene resin, acrylonitrile-styrene copolymer resin, acrylonitrile-butadiene- Examples thereof include styrene resins such as styrene copolymers, polyolefin resins such as polyethylene and polypropylene, and thermoplastic resins in which a plurality of resins are blended. Further, a monomer or oligomer polymerized by actinic light such as ultraviolet light, or a thermopolymerizable monomer or oligomer may be used as a precursor of the organic binder resin. Examples of the refractive index adjusters for the first optical adjustment layers 31 and 33 include fine particles such as zirconium oxide, titanium oxide, zinc oxide, tin oxide, barium titanate, niobium oxide, and aluminum oxide.

  The second optical adjustment layer 32 only needs to have a refractive index smaller than that of the first optical adjustment layers 31 and 33 by 0.01 or more. It can be selected from the organic binder resins used. The same applies to the refractive index adjusting agent. Examples of the organic binder resin that easily exhibits a low refractive index include a fluororesin. In addition, examples of the refractive index adjuster that easily exhibits a low refractive index include silica, hollow silica, and magnesium fluoride.

The thickness of the optical adjustment layer per layer is appropriately designed according to the number of layers of the optical adjustment layer 30, the height and the cross-sectional shape of the convex pattern 20, and a film thickness capable of forming the uneven shape derived from the convex pattern 20. Generally, the higher the height of the convex pattern 20, the larger the thickness of the optical adjustment layer can be. The lower limit of the optical adjustment layer is not particularly limited as long as it has the covering property. Further, the thickness of the optical adjustment layer per layer may be appropriately designed according to the number of stacked optical adjustment layers. For example, when the height of the convex pattern 20 is 30 μm, when three layers are stacked, the thickness can be about 10 μm per layer. Further, for example, in the case of a hemispherical dot pattern having a height of 10 μm and a diameter of 90 μm of the convex pattern 20, the thickness of the optical adjustment layer composed of three layers is independently 0.1 to 2 μm, more preferably, for each layer. Can be set to 0.2 to 1.0 μm.
From the viewpoint of moldability, the thickness of the optical adjustment layer per layer is preferably 3 μm or less, more preferably 2 μm or less, and still more preferably 1 μm or less.

  The method for forming the first optical adjustment layers 31 and 33 and the second optical adjustment layer 32 is not particularly limited. For example, comma coating, gravure coating, reverse coating, roll coating, lip coating, spray coating, screen printing, offset printing Examples of the method include printing, gravure printing, and printing methods such as inkjet printing, and known coating methods such as spin coating and spraying.

[Coloring layer]
The coloring layer 40 covers the optical adjustment layer 30 and plays a role as a background color of the convex pattern 20. By providing the colored layer 40, the visibility of the convex pattern 20 can be improved and the design can be imparted. The coloring layer 40 may be a single color such as white, pearl, black, red, or blue, or may be a combination of a plurality of colors to give a picture, a pattern, a metallic tone, a character, a pattern, or the like. The coloring layer 40 can be formed by a known manufacturing method. The coloring layer 40 may be either a single layer or multiple layers. From the viewpoint of simplicity, a method of printing an ink layer to obtain a colored layer is preferable.

  The method for forming the coloring layer 40 from a composition containing an organic binder and a pigment is simple. By using an organic binder, moldability can be improved. Preferable examples of the organic binder include the resins exemplified for the sheet-shaped transparent substrate 10. As the pigment, an organic pigment and / or an inorganic pigment can be used. When the coloring layer 40 is formed of a laminate, the pigment and the organic binder of each layer can be arbitrarily selected.

  A pearl pigment may be used as the pigment of the coloring layer 40 that more effectively enhances the design property in combination with the optical adjustment layer 30. Examples of the pearl pigment include particles containing a metal oxide in the surface layer. Examples thereof include particles in which natural mica is coated with a metal oxide such as titanium oxide or iron oxide. Examples of the metal oxide include oxides of metals such as zirconium, silicon, aluminum, and cerium in addition to those described above.

  As the coloring layer 40, a method of printing a coloring paint on the optical adjustment layer 30, a method of coating, and the like can be given. After printing or coating on the base material layer, drying and aging can be optionally performed. Further, a method of irradiating light after printing or coating, or the like can be given. The thickness of the colored layer 40 is not particularly limited as long as the intended color and pattern can be recognized, but is preferably 500 μm or less from the viewpoint of moldability.

  As a method for providing the coloring layer 40 on the optical adjustment layer 30 substrate, a known method can be used, and specifically, comma coating, gravure coating, reverse coating, roll coating, lip coating, spray coating, screen Printing, offset printing, gravure printing, inkjet printing, and the like can be given.

[Adhesive layer, protective layer, etc.]
The decorative sheet for molding of the first embodiment is used to prevent blocking during the production of the decorative sheet, to prevent scratching, to prevent damage during molding, to prevent traces of the mold, and to use the decorative molded article after molding. In order to prevent contamination of the sheet, a peelable protective film can be provided on the sheet-like transparent substrate. Further, an adhesive layer for improving the bonding property with the object to be decorated may be provided on the upper layer of the colored layer 40. Of course, the coloring layer 40 itself may have an adhesive function without providing the adhesive layer.

[Decorative molding]
The decorative sheet for molding of the first embodiment is to produce a decorative molded body by various molding methods such as insert molding, vacuum molding, pressure molding, TOM molding, injection molding, in-mold molding, press molding, stamping molding. Can be. From the viewpoint of maintaining good visibility of the convex pattern, the degree of the molding process is set so that the concave / convex pattern of the convex pattern and the concave / convex pattern derived from the convex pattern can be maintained in the upper optical adjustment layer. From such a viewpoint, when the degree of the forming process is large, it is preferable to design the convex and concave portions of the convex pattern to be large. Here, the decorative molded body refers to a molded body whose surface is covered with a decorative sheet for molding, and the material of the decorative body to be coated is not particularly limited, and a known material is used. can do.

  It is preferable to use a film having a breaking elongation at a temperature of 100 ° C. of 5% or more for each layer used in the decorative sheet for molding. It is more preferably at least 10%, further preferably at least 20%. By setting the elongation at break to 5% or more, the moldability can be improved. The elongation at break can be adjusted by adjusting the type of organic binder, the type of crosslink density, the film thickness, and the like.

  Examples of the material that can be used as the decoration object include wood, paper, metal, plastic, fiber-reinforced plastic, rubber, glass, minerals, clay, and the like. One or more kinds of them can be used in combination. be able to.

Examples of the plastic include polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyurethane, epoxy resin, acrylonitrile-butadiene-styrene (ABS) resin, acrylonitrile-styrene (AS) resin, poly (meth) acrylate, polycarbonate, polyamide, Examples thereof include polyimide, polyphenylene ether, polyphenylene sulfide, polyester, and polytetrafluoroethylene, and one or a combination of two or more can be used.
Examples of the fiber reinforced plastics include carbon fiber reinforced plastics, glass fiber reinforced plastics, aramid fiber reinforced plastics, polyethylene fiber reinforced plastics, and the like, and one kind or a combination of two or more kinds can be used.
Examples of the metal include hot-rolled steel, cold-rolled steel, galvanized steel, galvanized steel, galvanized steel, galvannealed steel, zinc alloy-plated steel, copper-plated steel, and zinc-nickel-plated steel , Zinc-aluminized steel, iron-galvanized steel, aluminum-plated steel, aluminum-galvanized steel, tin-plated steel, aluminum, stainless steel, copper, aluminum alloy, electromagnetic steel, etc. These can be used in combination. Further, a metal layer may be provided with a protective agent layer or the like.

  For example, after the decorative sheet for molding 1 is preformed into a desired shape, a plastic or fiber-reinforced plastic is injection-molded so that the sheet-shaped transparent substrate 10 side is the outermost layer, and a decorative molded article may be obtained. it can. Alternatively, a molded article is obtained from a plastic, fiber-reinforced plastic, or metal, and a molded decorative sheet 1 or a preformed article obtained by pre-molding the molded decorative sheet 1 into a desired shape is formed on the surface of the molded article. Can be obtained by affixing such that the sheet-shaped transparent substrate 10 side is the outermost layer. The molding temperature is preferably set to a temperature equal to or higher than the softening point of the organic binder resin and equal to or lower than the melting point. From the viewpoint of enhancing the moldability, it is preferable that various members of the decorative sheet for molding are formed of an organic binder resin, and it is preferable to use a material having excellent stretchability according to the degree of molding.

  According to the decorative sheet for molding according to the first embodiment, the convex pattern formed on the sheet-like transparent base material and the irregularities derived from the convex pattern covering the convex pattern are formed on the surface thereof. By having the optical adjustment layer and a coloring layer covering the optical adjustment layer, without using a metallic luster such as a metal thin film as a coloring layer, for example, it is difficult to visually recognize a transparent convex pattern, and in white Also, a decorative sheet for molding having excellent visibility can be provided.

  In addition, according to the decorative sheet for molding according to the first embodiment, the first optical adjustment layer, the second optical adjustment layer, and the first optical adjustment layer are laminated in this order, so that visibility is more effectively improved. Can be enhanced. Further, by forming the convex pattern with a member different from the sheet-shaped transparent base material, the degree of freedom in design can be increased, for example, a material having high extensibility can be selected as the material of the convex pattern according to the shape to be molded. There is an advantage. Further, since the organic binder resin is used, the production cost can be reduced as compared with the case where a vapor deposition layer is laminated, and inexpensive supply can be expected. Another advantage is that the size of the decorative sheet can be easily increased.

<Second embodiment>
Next, an example of a decorative sheet for molding different from the first embodiment will be described. The decorative sheet for molding according to the second embodiment is different in that the convex pattern is formed on the sheet-shaped transparent base material by using another member in that the convex pattern is provided on the sheet-shaped transparent base material itself. Although different from the first embodiment, other basic configurations and manufacturing methods are the same. In the following description, description overlapping with the first embodiment will be appropriately omitted. The same reference numerals are given to the same element members.

  In the decorative sheet for molding 2 according to the second embodiment, as shown in FIG. 2, an optical adjustment layer 30 and a coloring layer 40 are laminated in this order on a sheet-like transparent base material 10 on which a convex pattern 20 is formed. Have been. The convex pattern 20 can be formed by embossing on the second surface 12 of the sheet-shaped transparent substrate 10 opposite to the first surface 11 on the viewing side. The embossing is preferably performed by applying heat and pressure. By considering the height and width of the convex pattern 20 so that the convex pattern 20 does not become flat due to heat and stress at the time of molding processing such as injection molding, excellent visibility is exhibited even after molding. be able to.

  According to the decorative sheet for molding according to the second embodiment, the same effects as in the first embodiment can be obtained. In addition, since the convex pattern 20 is formed of the same material as the sheet-shaped transparent substrate, the manufacturing process can be simplified. Further, as compared with the case where the convex pattern is formed by a separate member as in the first embodiment, there is an advantage that, for example, shapes having different heights can be easily formed easily.

<Third embodiment>
The decorative sheet for molding according to the third embodiment is different from the first embodiment in which three optical adjustment layers are provided in that one optical adjustment layer is provided, but other basic configurations and The manufacturing method is the same.

  In the decorative sheet for molding 3 according to the third embodiment, as shown in FIG. 3, a convex pattern 20, an optical adjustment layer 30, and a coloring layer 40 are laminated on a sheet-like transparent substrate 10 in this order. The optical adjustment layer 30 is a single layer including only the first optical adjustment layer 31.

  According to the decorative sheet for molding according to the third embodiment, the same effects as in the first embodiment can be obtained. Further, since the optical adjustment layer 30 is formed as a single layer, the manufacturing process can be simplified.

<Modification>
Next, a modified example of the decorative sheet for molding according to the present embodiment will be described. However, the present invention is not limited to the above embodiments and modified examples, and other embodiments can be included in the scope of the present invention as long as the spirit of the present invention is met. In addition, the embodiments and the modifications are preferably combined with each other. The method for manufacturing the decorative sheet for molding of the present invention is not limited to the manufacturing method of the above embodiment, but can be manufactured by various manufacturing methods.

  In the first embodiment, the plurality of convex patterns 20 are formed separately from each other on the sheet-shaped transparent base material 10. However, a continuous convex pattern may be formed. Further, in the first embodiment, the sheet-shaped transparent base material is exposed in the concave portion. However, as in the decorative sheet for molding 4 shown in FIG. The material 10 may be covered, and the member may be used to form an uneven structure by embossing or the like.

  Further, the convex pattern 20 may have a plurality of heights, for example, as shown in a partially enlarged cross-sectional view of the convex pattern in FIG. Further, the convex pattern 20 does not need to be formed immediately above the sheet-shaped transparent substrate, and these layers may be laminated via an easy-adhesion layer, for example. In addition, between the optical adjustment layer 30 and the coloring layer 40, a transparent layer in which the unevenness derived from the convex pattern 20 is not formed on the surface thereof may be formed. Further, as an optical adjustment layer, a laminate in which two first optical adjustment layers and a second optical adjustment layer are laminated in this order, or a laminate in which two or more first optical adjustment layers having the same or different refractive indexes are laminated. Is also good. A laminate in which four or more first optical adjustment layers and second optical adjustment layers are alternately or arbitrarily arranged is also suitable.

  The decorative molded body of the present embodiment is used as an interior part of an automobile such as an instrument panel decoration panel, a shift gate panel, a door trim, an air conditioner operation panel, a car navigation, or an emblem of an automobile front and rear part, a center ornament of a tire and a wheel, and a name. Used as exterior parts such as plates. In addition to automotive interior and exterior parts, it protects not only exterior materials such as home appliances, smart keys, smartphones, mobile phones, and notebook computers, but also exterior materials such as helmets and suitcases, and LCD screens such as car navigation systems and LCD televisions. It can be suitably used for exterior materials such as protective sheets and power storage devices, sports equipment such as tennis rackets and golf shafts, doors and partitions for houses, wall panels for system kitchens, and building materials such as wall materials.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the following Examples. In Examples, “parts” indicates “parts by mass” and “%” indicates “% by mass”.
The refractive index (absolute refractive index) is the refractive index of light (D line) having a wavelength of 589 nm, and was measured at 25 ° C. using an Abbe refractometer (“DR-M4” manufactured by Atago Co., Ltd.).

(Example 1)
A decorative sheet for molding showing the laminated structure of FIG. 3 was produced by the following method. First, the ink for forming the convex pattern is formed on one main surface of a transparent transparent substrate (made by Teijin Limited, having a refractive index of 1.59 and a thickness of 400 μm) 10 having a thickness of 25 μm × 40 cm and made of polycarbonate. (TU760 FDSS clear varnish B, refractive index 1.52, manufactured by Toyo Ink Co., Ltd.) was screen-printed using a 420 mesh plate made of a polyester material. As the pattern of the convex pattern 20, a hemisphere having a diameter of 90 μm and a height of 10 μm was formed as a dot pattern at 0.1 mm intervals. After printing, a metal halide lamp (manufactured by Eye Graphic Co., Ltd.) was used as a light source, and UV irradiation was performed under the conditions of 120 W / cm, a conveyor speed of 3 m / min, and one lamp. The integrated light amount was about 600 mJ / cm ² . Through these steps, a convex pattern 20 was formed on one surface of the sheet-shaped transparent substrate 10 (see FIGS. 6 and 7).

  Next, on the sheet-shaped transparent base material 10 on which the convex pattern 20 is formed, an ink for forming the first optical adjustment layer 31 (Rioduras TYT70, refractive index 1.70, manufactured by Toyochem Corp.) Screen printing was performed using a 420 mesh plate of a polyester material. The thickness of the first optical adjustment layer 31 after drying was set to 1.0 μm. By this step, a laminate in which the surface on which the convex pattern 20 was formed was covered with the first optical adjustment layer 31 was obtained. It was confirmed that unevenness derived from the hemisphere of the convex pattern 20 was formed on the surface of the first optical adjustment layer 31.

  Thereafter, a white ink (SS16, white, manufactured by Toyo Ink Co., Ltd.) for forming the colored layer 40 was applied to the upper layer of the first optical adjustment layer 31 four times in total using a 200-mesh plate made of a polyester material. Screen printed. The film thickness after drying was 80 μm. Through these steps, a decorative sheet for molding 3 was obtained.

(Example 2)
As shown in the second embodiment, the convex pattern 20 is formed on the sheet-shaped transparent base material 10 itself, and the molding shows a laminated structure having one optical adjustment layer (first optical adjustment layer) as in the third embodiment. A decorative sheet for use was produced by the following method. Specifically, a 400 μm-thick, 25 cm × 40 cm sheet-shaped transparent substrate (manufactured by Teijin Limited, refractive index: 1.59, thickness: 400 μm) made of polycarbonate is placed on a hydraulic press (Nippon Automatic Machine Co., Ltd.). ) Was formed by embossing. As the pattern of the convex pattern 20, a hemisphere having a diameter of 90 μm and a height (depth) of 10 μm was formed as a dot pattern at 1.0 mm intervals. Other conditions and methods were the same as in Example 1 to obtain a decorative sheet for molding.

(Example 3)
As shown in FIG. 4, a coating film for forming the convex pattern 20 is formed on the sheet-like transparent base material 10, and then the convex pattern 20 is formed by embossing, as in the third embodiment. A decorative sheet for molding having a laminated structure having one optical adjustment layer (first optical adjustment layer) was produced by the following method. Specifically, on the main surface of a sheet-shaped transparent substrate of 25 μm × 40 cm (manufactured by Teijin Limited, refractive index: 1.59, thickness: 400 μm) made of polycarbonate and having a thickness of 400 μm, the convex pattern is formed. (Ryoduras LCH2432, refractive index 1.52, manufactured by Toyochem Corporation) was used to obtain a coating film having a dry film thickness of 10 μm on the entire surface. Next, a convex pattern was formed by embossing using a laminator apparatus (manufactured by Taisei Laminator Co., Ltd.). As the pattern of the convex pattern, a hemisphere having a diameter of 90 μm and a height (depth) of 10 μm was formed as a dot-like pattern at 0.1 mm intervals. Other conditions and methods were the same as in Example 1 to obtain a decorative sheet for molding.

(Examples 4 to 9, 12 to 14)
A decorative sheet for molding 3 was obtained in the same manner as in Example 1 except that the conditions shown in Table 1 were changed. In Examples 6 and 7, Lioduras TYT55 (refractive index 1.55) and Lioduras TYT80 (refractive index 1.80) manufactured by Toyochem Corporation were used as inks for forming the first optical adjustment layer. The red ink of Example 12 was SS16 red, manufactured by Toyo Ink Co., Ltd., the blue ink of Example 13 was SS16 indigo, manufactured by Toyo Ink Co., Ltd. (Toyo Ink Co., Ltd., SS16 black) was used as the black ink.

(Example 10)
A decorative sheet for molding in which the optical adjustment layer 30 includes the first optical adjustment layer 31 and the second optical adjustment layer 32 was produced. Specifically, the process was the same as in Example 1 until the first optical adjustment layer 31 was formed. Next, an ink for forming the second optical adjustment layer 32 on the convex pattern 20 formed on the sheet-shaped transparent base material 10 and the first optical adjustment layer 31 (Rioduras TYM45, manufactured by Toyochem Corporation) A refractive index of 1.45) was screen printed using a 420 mesh plate of polyester material. The film thickness after drying was set to 1.0 μm. On the surface of the second optical adjustment layer 32, it was confirmed that irregularities derived from the hemisphere of the convex pattern 20 were formed on the surface. Then, the colored layer 40 was formed in the same manner as in Example 1 to obtain a decorative sheet for molding in which the optical adjustment layer was formed of a laminate of the first optical adjustment layer and the second optical adjustment layer.

(Example 11)
A decorative sheet for molding having the laminated configuration shown in FIG. 1 was produced. Specifically, the same procedure as in Example 10 was performed until the second optical adjustment layer 32 was formed. Then, the same ink as that of the first layer was used as the first optical adjustment layer 33 of the third layer. Screen-printed through the plate. The film thickness after drying was set to 1.0 μm. It was confirmed that the surface of the first optical adjustment layer 33 as the outermost layer of the optical adjustment layer 30 had irregularities derived from the hemisphere of the convex pattern formed on the surface. Then, the colored layer 40 was formed in the same manner as in Example 1 to obtain a decorative sheet for molding.

(Comparative Example 1)
A decorative sheet for molding was produced in the same manner as in Example 1 except that the optical adjustment layer was not provided. That is, the process is the same as that in Example 1 until the convex pattern 20 is formed on the sheet-shaped transparent base material 10, and thereafter, without providing the optical adjustment layer 30, the irregularities derived from the convex pattern 20 become flat. The colored layer 40 was formed in the same manner as in Example 1.

(Comparative Example 2)
As an ink for forming the first optical adjustment layer 31, except that an ink having a refractive index difference of 0.02 from the convex pattern 20 (manufactured by Toyochem Co., Ltd., Lioduras TYT54, refractive index 1.54) was used. A decorative sheet for molding was produced in the same manner as in Example 1.

(Comparative Example 3)
A method similar to that of Example 1 except that an ink having a refractive index of more than 1.85 (Ryoduras TYT90, refractive index 1.90) having a refractive index of more than 1.85 was used as the ink for forming the first optical adjustment layer 31. Thus, a decorative sheet for molding was produced.

(Comparative Example 4)
A decorative sheet for molding was produced in the same manner as in Example 1, except that the thickness of the layer corresponding to the position of the first optical adjustment layer 31 after drying was 15 μm. As a result, the layer corresponding to the first optical adjustment layer had a thickness of 15 μm, and as a result, a layer in which the unevenness derived from the convex pattern 20 became flat was obtained. That is, Comparative Example 4 is an example of a decorative sheet for molding having a layer made of the same ink as that of the example, without the unevenness derived from the convex pattern 20.

(Visibility evaluation 1 (decorative sheet for molding))
The visibility of the obtained decorative sheet for molding was visually inspected at a position 30 cm away from the sheet-shaped transparent substrate surface, and, unless otherwise specified, judged from the normal direction of the surface by the following evaluation criteria. . When using a light source, the light source was arranged at a position 50 cm away from the sheet-shaped transparent substrate surface. In the case of sunlight, judgment was made at a position where direct sunlight did not shine.
5: The pattern can be clearly confirmed even in a dark condition (10 lux).
4: Less than 5, the pattern can be clearly seen under indoor fluorescent light (100 lux).
3: Less than 4, the pattern can be clearly confirmed under sunlight, and the pattern can be confirmed by angle even under indoor fluorescent light (300 lux) (practical level).
2: Less than 3, the pattern can be confirmed under sunlight, but not under indoor fluorescent light.
The ratio was less than 1: 2, and the pattern could not be seen from any angle even if strong light was applied.

(Preparation of decorative molded body)
Using the decorative sheet for molding of each of the above Examples and Comparative Examples, a decorative molded article was manufactured by the following method. First, it is set in the middle of a vacuum forming machine (manufactured by Fuse Vacuum Co., Ltd.) divided into upper and lower two chamber boxes such that the sheet-shaped transparent base material side faces down. The mold was a hemispherical shape having a diameter of 5 cm and a height of 2 cm. Next, the inside of the chamber box is evacuated by a vacuum pump. The heater at the top of the chamber is turned on, and heating is continued until the surface temperature of the decorative sheet for molding reaches 170 ° C. When the decorative sheet for molding softens and falls down, the mold of the lower chamber box is raised to bring the mold into a state covered by the decorative sheet for molding.
Next, the upper chamber box is opened to the atmosphere. The decorative sheet for molding adheres to the mold due to the pressure difference. By sending compressed air into the upper chamber box, the decorative sheet for molding is brought into close contact with the mold with even greater force. The lower chamber box was returned to the atmospheric pressure state, the upper chamber box was raised and cooled, and then the preformed product was taken out of the mold. The molded sheet was evaluated according to the following criteria.

(Visibility evaluation 2 (decorative molding))
The visibility of the spherical pattern, which is the convex pattern of the molded decorative sheet after molding, was determined at a position 30 cm away from the sheet-like transparent substrate surface, and from the normal direction of the surface according to the following evaluation criteria. . Various conditions such as the light source were the same as in the visibility evaluation 1.
5: The pattern can be clearly confirmed even in a dark condition (10 lux).
4: Less than 5, the pattern can be clearly seen under indoor fluorescent light (100 lux).
3: Less than 4, the pattern can be clearly confirmed under sunlight, and the pattern can be confirmed depending on the angle even under an indoor fluorescent lamp (300 lux) (practical level).
2: Less than 3, the pattern can be confirmed under sunlight, but not under indoor fluorescent light.
The ratio was less than 1: 2, and the pattern could not be seen from any angle even if strong light was applied.

(Formability evaluation)
With respect to the decorative sheet for molding after molding of the decorative molded articles of the above Examples and Comparative Examples, the adhesion of each layer was evaluated according to the following criteria.
3: No lifting or peeling was observed.
2: Slight lifting or peeling is observed.
1: Floating or / and peeling is observed

Tables 1 and 2 show the evaluation results.

  As shown in Tables 1 and 2, the decorative sheet for molding of Comparative Example 1 without using the optical adjustment layer 30 did not reach the acceptable level in appearance. In addition, the visibility evaluation of the decorative sheet for molding of Comparative Example 2 using the first optical adjustment layer 31 having a refractive index difference of 0.02 from the convex pattern 20 did not reach an acceptable level. Further, as a layer corresponding to the optical adjustment layer 30, the decorative sheet for molding of Comparative Example 4 in which the surface of the layer has a flat layer without unevenness derived from the convex pattern 20 does not reach the acceptable level. Was. On the other hand, all of the decorative sheets for molding according to the examples of the present invention reached the acceptable level, and it was confirmed that they were excellent in visibility. In particular, it was confirmed that even a white colored layer having a high degree of difficulty in terms of visibility of a transparent convex pattern exhibited excellent visibility.

Claims (11)

A sheet-shaped transparent substrate,
On the surface opposite to the viewing side of the sheet-shaped transparent substrate , the height formed on the sheet-shaped transparent substrate itself, or formed using another transparent member on the sheet-shaped transparent substrate, Is a convex pattern of 5 μm or more ,
A transparent optical adjustment layer that covers the surface on which the convex pattern is provided, and has irregularities derived from the convex pattern formed on its surface,
A colored layer that covers the optical adjustment layer,
Each of the sheet-shaped transparent substrate, the transparent member, and the optical adjustment layer has a total light transmittance of 80% or more in a visible light band having a wavelength of 400 to 800 nm,
The optical adjustment layer has one or more first optical adjustment layers having a refractive index greater than or equal to 0.03 or more than the refractive index of the member forming the convex pattern, and having a refractive index of 1.80 or less. Decorative sheet for molding.   The decorative sheet for molding according to claim 1, wherein the first optical adjustment layer contains an organic binder.   The optical adjustment layer further has one or more second optical adjustment layers having a refractive index smaller than the refractive index of the first optical adjustment layer by 0.01 or more and the refractive index is 1.35 or more. The decorative sheet for molding according to claim 1, wherein at least one first optical adjustment layer is disposed between the convex pattern and the second optical adjustment layer.   The decorative sheet for molding according to claim 3, wherein the second optical adjustment layer contains an organic binder.   The decorative sheet for molding according to claim 3 or 4, wherein the decorative sheet comprises a layer in which the first optical adjustment layer and the second optical adjustment layer are alternately laminated.   The decorative sheet for molding according to any one of claims 1 to 5, wherein the coloring layer comprises an ink layer. A step (A) of forming a convex pattern having a height of 5 μm or more on the surface of the sheet-shaped transparent substrate opposite to the viewing side;
A step (B) of coating a surface provided with the convex pattern with a transparent optical adjustment layer so that irregularities derived from the convex pattern remain on the surface;
Covering the optical adjustment layer with a colored layer (C).
The step (A) includes a step of forming the convex pattern on the sheet-shaped transparent base material itself, or a step of forming the convex pattern using another transparent member on the sheet-shaped transparent base material. ,
In the step (B), one or more first optical adjustment layers having a refractive index of at least 0.03 or more and a refractive index of 1.80 or less than the refractive index of the member constituting the convex pattern are formed. the step of viewing including,
The method for producing a decorative sheet for molding , wherein the sheet-shaped transparent substrate, the transparent member, and the optical adjustment layer each have a total light transmittance of 80% or more in a visible light band of a wavelength of 400 to 800 nm . The method for producing a decorative sheet for molding according to claim 7, wherein the step (A) is any one of steps (A-1) to (A-3).
(A-1) a step of pattern-printing a transparent ink on the surface of the sheet-shaped transparent substrate opposite to the viewing side to form the transparent convex pattern.
(A-2) a step of applying a transparent ink on the surface of the sheet-shaped transparent substrate opposite to the viewing side and then forming the transparent convex pattern by embossing.
(A-3) a step of forming the transparent convex pattern on one surface of the sheet-like transparent substrate by embossing. The step (B) may further comprise forming one or more second optical adjustment layers having a refractive index smaller than the refractive index of the first optical adjustment layer by 0.01 or more and having the refractive index of 1.35 or more. Further comprising the step of forming
The method for manufacturing a decorative sheet for molding according to claim 7, wherein at least one first optical adjustment layer is disposed between the convex pattern and the second optical adjustment layer.   The method for producing a decorative sheet for molding according to claim 9, wherein in the step (B), the first optical adjustment layer and the second optical adjustment layer are alternately laminated. A decorative body, comprising a decorative sheet covering at least a part of the decorative body,
A decorative molded article, wherein the decorative sheet is the decorative sheet according to any one of claims 1 to 6.

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