WO2023181530A1 - 加飾用積層体、加飾成形品及び表示装置 - Google Patents

加飾用積層体、加飾成形品及び表示装置 Download PDF

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Publication number
WO2023181530A1
WO2023181530A1 PCT/JP2022/046255 JP2022046255W WO2023181530A1 WO 2023181530 A1 WO2023181530 A1 WO 2023181530A1 JP 2022046255 W JP2022046255 W JP 2022046255W WO 2023181530 A1 WO2023181530 A1 WO 2023181530A1
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WO
WIPO (PCT)
Prior art keywords
light
layer
light transmitting
printing layer
interference pigment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/046255
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
宏 池原
裕之 加藤
健太郎 山口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alps Alpine Co Ltd
Original Assignee
Alps Alpine Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alps Alpine Co Ltd filed Critical Alps Alpine Co Ltd
Priority to KR1020247029912A priority Critical patent/KR20240146678A/ko
Priority to CN202280091816.2A priority patent/CN118695947A/zh
Priority to DE112022006892.2T priority patent/DE112022006892T5/de
Priority to JP2024509756A priority patent/JP7683856B2/ja
Publication of WO2023181530A1 publication Critical patent/WO2023181530A1/ja
Priority to US18/888,598 priority patent/US12270539B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14688—Coating articles provided with a decoration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/10—Removing layers, or parts of layers, mechanically or chemically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/14—Printing or colouring
    • B32B38/145—Printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/14—Multicolour printing
    • B41M1/18—Printing one ink over another
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/26—Printing on other surfaces than ordinary paper
    • B41M1/30—Printing on other surfaces than ordinary paper on organic plastics, horn or similar materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
    • B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
    • B60Q3/10—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for dashboards
    • B60Q3/14—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors for dashboards lighting through the surface to be illuminated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/12—Signs, boards or panels, illuminated from behind the insignia using a transparent mirror or other light reflecting surface transparent to transmitted light whereby a sign, symbol, picture or other is visible only when illuminated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B32B2307/4026—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/418—Refractive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2310/00—Treatment by energy or chemical effects
    • B32B2310/08—Treatment by energy or chemical effects by wave energy or particle radiation
    • B32B2310/0806—Treatment by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation
    • B32B2310/0843—Treatment by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation using laser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2310/00—Treatment by energy or chemical effects
    • B32B2310/14—Corona, ionisation, electrical discharge, plasma treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2451/00—Decorative or ornamental articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays

Definitions

  • the present invention relates to a decorative laminate, a decorative molded product, and a display device.
  • Decorative laminates with designs such as patterns and pictures are provided on the surfaces of molded products such as vehicle interior parts, architectural interior materials, and home appliance casings in order to harmonize with the surroundings of the molded product.
  • a light source is installed to display, for example, images, figures, characters, etc.
  • the design on the surface of the decorative laminate is displayed, and when the light source is turned on, the light emitted from the light source is displayed.
  • the light transmitted through the molded product and the decorative laminate is displayed on the surface of the decorative laminate.
  • a decorative laminate used for decorating such molded products includes, for example, a base film, a first pattern layer, a second pattern layer, an optical function layer, a transmittance adjustment layer, and an adhesive layer.
  • a decorative sheet has been disclosed that is equipped with the following, expresses a wood grain pattern when the light source of a display device is turned off, and displays an image on the surface of the decorative sheet when the light source is turned on (see, for example, Patent Document 1).
  • the decorative laminate such as the decorative sheet of Patent Document 1 has stealth properties that prevent the light source placed on the back side of the molded product from being visible from the surface of the decorative laminate when the lights are off, and For example, in the case of wood grain patterns, etc., it is desirable to suppress the light transmittance of the decorative laminate to 20% or less, for example, from the viewpoint of achieving both light transmittance that allows light from the light source to pass through. It is said that
  • One aspect of the present invention is to sufficiently ensure stealth property that the light source disposed on the back side of the molded product is not visible from the surface of the decorative laminate when the light source is turned off, and to reduce the brightness of the light source when the light source is turned on.
  • the purpose of the present invention is to provide a decorative laminate that can transmit and display the light emitted from a light source with high brightness without increasing the brightness, and can increase the visibility when turned on by increasing the diffused transmittance. do.
  • One embodiment of the decorative laminate according to the present invention is A decorative laminate through which light emitted from a light source passes, a base material that is optically transparent and has a first main surface and a second main surface opposite to the first main surface; a light adjustment layer provided on the first main surface side of the base material; an interference pigment printing layer provided on the second main surface side of the base material, containing a plurality of types of interference pigments and ultraviolet absorbers in a binder resin, and representing a visible design; a black translucent printing layer provided on the opposite side of the interference pigment printing layer from the base material and containing a pigment and an ultraviolet absorber in a binder resin; Equipped with The light adjustment layer has an uneven portion formed to correspond to the shape of the design represented by the interference pigment printing layer on the surface opposite to the base material,
  • the interference pigment printing layer has a first light transmitting portion on the main surface of the interference pigment printing layer through which the light can pass,
  • the black semi-transparent printed layer has a second light-transmissive part through which the light can pass
  • One embodiment of the decorative laminate according to the present invention sufficiently secures stealth properties such that the light source disposed on the back side of the molded product cannot be seen from the surface of the decorative laminate when the light source is turned off, and The light emitted from the light source can be transmitted and displayed with high brightness without increasing the brightness of the light source when the light source is turned on, and the visibility when the light source is turned on can be improved by increasing the diffuse transmittance.
  • FIG. 1 is a diagram showing an example of a plane of a decorative laminate according to an embodiment of the present invention.
  • 2 is a partially enlarged view of FIG. 1.
  • FIG. 3 is a sectional view taken along line AA in FIG. 2.
  • FIG. 2 is a schematic diagram for explaining reflection and transmission of light in an interference pigment.
  • FIG. 3 is a cross-sectional view of another example of the structure of the decorative laminate according to the embodiment of the present invention, taken along line AA in FIG. 2;
  • FIG. 1 is a partially enlarged sectional view showing a part of a decorative molded product including a decorative laminate according to an embodiment of the present invention.
  • FIG. 2 is a diagram showing an example of a plane of a display device including a decorative laminate according to an embodiment of the present invention, showing a state where the lights are off and a state where the lights are on.
  • 8 is a partially enlarged sectional view of a portion of FIG. 7.
  • the terms layer, sheet, and film are only different names and are not distinguished from each other.
  • the term sheet also includes members that may be referred to as layers or films.
  • FIG. 1 is a diagram showing an example of a plane of a laminate according to an embodiment of the present invention
  • FIG. 2 is a partially enlarged view of FIG. 1
  • FIG. 3 is a cross-sectional view taken along line AA in FIG. , is a cross-sectional view schematically showing an example of the configuration of a laminate according to the present embodiment.
  • the laminate 1A according to the present embodiment has a design consisting of a wood grain pattern in which a plurality of vertical grains are formed on the surface.
  • the design of the laminate 1A is a wood grain pattern.
  • the design is not limited to a wood grain pattern, and may include marble-like patterns, geometric patterns, carbon-like patterns, stripes, polka dots, single colors, etc. It may be any picture, figure, character, etc.
  • the laminate 1A includes a light adjustment layer 10, a transparent base layer 20 as a base material, an interference pigment printing layer 30, a smoke layer 40 as a black translucent printing layer, and a black symbol printing layer.
  • the black layer 50 is laminated in this order.
  • the laminate 1A is irradiated with light emitted from the light source 2, which is a light emitting part, from the back side of the laminate 1A (lower side of the black layer 50 in FIG. 3), passes through the laminate 1A, and illuminates the surface of the laminate 1A. The light is emitted to the side (the upper side of the light adjustment layer 10 in FIG. 3). Note that the laminate 1A does not need to include the black layer 50.
  • a binder for bonding with the molded resin is formed on the surface exposed to the outside of the smoke layer 40 or black layer 50 of the sheet material shown in FIG. Obtained by insert molding into panels.
  • the light adjustment layer 10 side of the laminate 1A is referred to as the front surface
  • the black layer 50 side is referred to as the back surface.
  • the front side is sometimes referred to as the top and the back side is referred to as the bottom, but this does not represent a universal vertical relationship.
  • the laminate 1A is provided with a light adjustment layer 10 having an uneven shape on its surface side, and a portion with high light transmittance is provided in the interference pigment printing layer 30 and the smoke layer 40 disposed below the light adjustment layer 10. There is.
  • the laminate 1A expresses a shape that matches the design of the interference pigment printed layer 30 on the surface of the light adjustment layer 10, imparts a tactile sensation, and scatters visible light entering from the outside to transmit light.
  • the parts with high transparency (translucency) are made invisible to the naked eye.
  • the overall light transmittance of the laminate 1A can be increased to, for example, 30% to 40%.
  • the laminate 1A has the stealth property of making the light source 2 arranged on the back side of the laminate 1A and the part without the smoke layer 40 or the black layer 50 invisible when the light source 2 is turned off, and the stealth property of making the part without the smoke layer 40 or the black layer 50 invisible when the light source 2 is turned off. Since it is possible to achieve both light transmittance that allows light to pass through, an image can be displayed on the surface of the laminate 1A with high overall brightness without increasing the brightness of the light source 2 when turned on.
  • having light transparency refers to having transparency to such an extent that light from the light source 2 can pass through when the light source 2 disposed on the back side of the laminate 1A is irradiated with light. Or it means translucent. Transparent includes colorless and transparent or colored and transparent.
  • the light source 2 is not particularly limited, and includes, for example, an incandescent light bulb, a fluorescent light, an LED matrix display, an organic EL display, a light emitting diode (LED), a liquid crystal display (LCD), and the like. Alternatively, natural light may be used as the light source 2.
  • the light adjustment layer 10 may be provided on the entire upper surface 201, which is the first main surface of the transparent base layer 20, or may be provided partially on the upper surface 201. From the viewpoint of suitably protecting the surface of the laminate 1A, the light adjustment layer 10 is preferably provided on the entire main surface side.
  • the light adjustment layer 10 has a function of protecting the surface of the laminate 1A from chemicals such as UV cream, and has a hard coat function with high hardness and high scratch resistance, as well as an antireflection function, an ultraviolet shielding function, and an infrared ray shielding function. It may have a shielding function, an anti-fog function, an anti-fouling function, an anti-glare function, etc.
  • the light adjustment layer 10 is usually transparent or semi-transparent, but may be colored as long as the design of the interference pigment printed layer 30 is visible when the light source 2 is turned on when the laminate 1A is observed from the light adjustment layer 10 side. or may contain a matting agent such as silica.
  • Colorants include, but are not particularly limited to, inorganic pigments such as carbon black, iron black, titanium white, antimony white, yellow lead, titanium yellow, Bengara, cadmium red, ultramarine, and cobalt blue; quinacridone red; , isoindolinone yellow, phthalocyanine blue, and other organic pigments or dyes; metallic pigments made of scaly foils such as aluminum and brass; pearlescent pigments made of scaly foils such as titanium dioxide-coated mica, and basic lead carbonate; ) Pigments, etc.
  • the material constituting the light adjustment layer 10 is not particularly limited, and includes, for example, thermoplastic resins, thermosetting resins such as acrylic and urethane-based resins, and ionizing radiation-curable resins.
  • the light adjustment layer 10 is preferably made of an ionizing radiation-curable resin composition in order to improve scratch resistance and the like.
  • the ionizing radiation-curable resin composition needs to be cured in order to be able to follow the shape of the final product (e.g., curved surface or three-dimensional shape) when it is molded into the shape of the final product by insert molding, forming, etc. The previous state (uncured) is preferable.
  • the ionizing radiation-curable resin used to form the light adjustment layer 10 is a resin that is crosslinked and cured by irradiation with ionizing radiation, and specifically contains polymerizable unsaturated bonds or epoxy groups in the molecule. Examples include a mixture of at least one of prepolymers, monomers, oligomers, etc., having the following.
  • ionizing radiation refers to electromagnetic waves or charged particle beams that have energy quantum that can polymerize or crosslink molecules, and ultraviolet (UV) or electron beam (EB) are usually used, but other It also includes electromagnetic waves such as X-rays and ⁇ -rays, and charged particle beams such as ⁇ -rays and ion beams.
  • UV ultraviolet
  • EB electron beam
  • electron beam curable resins are suitable for forming the light adjustment layer 10 because they can be made solvent-free, do not require a photopolymerization initiator, and can provide stable curing characteristics. used for.
  • (meth)acrylate monomers having a radically polymerizable unsaturated group in the molecule are preferred, and among them, polyfunctional (meth)acrylate monomers are preferred.
  • the polyfunctional (meth)acrylate monomer may be any general polyfunctional (meth)acrylate monomer, and has two or more (bifunctional or more) polymerizable unsaturated bonds in the molecule, preferably three or more. Any (meth)acrylate monomer having (trifunctional or higher) functionality may be used.
  • One type of polyfunctional (meth)acrylate may be used alone, or two or more types may be used in combination.
  • (meth)acrylate oligomers having radically polymerizable unsaturated groups in the molecule are suitable; Polyfunctional (meth)acrylate oligomers having the above) are preferred.
  • the polyfunctional (meth)acrylate oligomer include polycarbonate (meth)acrylate, urethane (meth)acrylate, epoxy (meth)acrylate, and polyester (meth)acrylate.
  • the polyfunctional (meth)acrylate oligomers may be used alone or in combination of two or more.
  • polycarbonate (meth)acrylate from the viewpoint of further improving the visual design, abrasion resistance, and moldability. It is also preferable to use polycarbonate (meth)acrylate and urethane (meth)acrylate in combination.
  • the light adjustment layer 10 may contain various additives depending on desired physical properties.
  • additives include weather resistance improvers such as ultraviolet absorbers and light stabilizers, wear resistance improvers, polymerization inhibitors, crosslinking agents, infrared absorbers, antistatic agents, adhesion improvers, leveling agents, Examples include thixotropic agents, coupling agents, plasticizers, antifoaming agents, fillers, solvents, colorants, and the like. These additives can be selected and used as appropriate.
  • the ultraviolet absorber and light stabilizer a reactive ultraviolet absorber and light stabilizer having a polymerizable group such as a (meth)acryloyl group in the molecule may be used.
  • the light adjustment layer 10 has an uneven portion 11 having an uneven shape on its surface 101.
  • the uneven portion 11 is formed to correspond to the shape of the design represented by the interference pigment printing layer 30. That is, the concave portions 111 constituting the uneven portions 11 are formed to correspond to the shape of the design of the interference pigment printed layer 30.
  • “corresponding” includes not only the case where the concave portions of the uneven portion 11 match the contour of the design represented by the interference pigment printing layer 30 but also the case where the concave portions of the uneven portion 11 substantially coincide with the contour of the design.
  • the case of substantially matching includes the case of matching to some extent.
  • the light adjustment layer 10 has the uneven parts 11 to provide a tactile design, and the uneven parts 11 scatter visible light incident from the outside of the laminate 1A, so that when the light source 2 is turned off, the interference pigment
  • the first light transmitting portion 33 of the print layer 30, the second light transmitting portion 41 of the smoke layer 40, and the opening 51 of the black layer 50 can be made inconspicuous to the naked eye.
  • the light adjustment layer 10 may be composed of two or more layers.
  • the light adjustment layer 10 may be configured by providing one or more layers having a tactile function and consisting of the convex portions of the uneven portions 11 on a planar layer having surface protection properties such as scratch resistance.
  • the thickness of the light adjustment layer 10 is not particularly limited, but from the viewpoint of imparting surface protection properties such as scratch resistance and durability to the surface 101, it is preferably 0.1 ⁇ m to 2000 ⁇ m. Note that since the light adjustment layer 10 has the uneven portion 11, the thickness of the light adjustment layer 10 is the thickness at the position of the convex portion of the uneven portion 11.
  • the method for forming the light adjustment layer 10 is not particularly limited, and can be formed by any suitable method.
  • an ionizing radiation-curable resin composition is prepared, and the prepared ionizing radiation-curable resin composition is applied to a coating surface to form an uncured resin layer.
  • the ionizing radiation-curable resin composition may have a viscosity as long as it can form an uncured resin layer by the coating method described below.
  • the method of applying the prepared ionizing radiation-curable resin composition includes roll coating, screen coating, gravure coating, spin coating, reverse coating, kiss coating, bar coating, blade coating, flow coating, air knife coating, dip coating, and spray coating.
  • General coating methods such as a transfer coating method, a method of dropping a small amount of an ionizing radiation-curable resin composition onto the transparent base material layer 20 and spreading it with a doctor blade can be used. By these coating methods, the ionizing radiation-curable resin composition can be coated substantially uniformly on the transparent base layer 20.
  • an uncured resin layer having a tactile function consisting of the convex portions of the concavo-convex portions 11 is applied to the formed uncured resin layer, and is dried under heat to form an uncured resin layer with a concavo-convex shape, that is, a light adjustment layer.
  • Layer 10 is formed.
  • the light adjustment layer 10 is made to fit the shape of the final product by insert molding, forming, etc., and is made to follow the shape of the final product (for example, a curved surface or three-dimensional shape), and then is irradiated with ionizing radiation such as an electron beam or ultraviolet rays.
  • the uncured resin layer can be cured.
  • the accelerating voltage can be appropriately selected depending on the type of resin used, the thickness of the layer, etc., and may be, for example, 70 kV to 300 kV.
  • the higher the accelerating voltage the higher the penetration ability, so when using a resin that is easily deteriorated by electron beam irradiation under the light adjustment layer 10, the penetration depth of the electron beam and the light adjustment
  • the accelerating voltages are chosen such that the thicknesses of the layers 10 are substantially equal. Thereby, it is possible to suppress irradiation of excess electron beams to layers located under the light adjustment layer 10, and it is possible to minimize deterioration of each layer due to excessive electron beams.
  • the irradiation dose is appropriately selected, and is preferably an amount that saturates the crosslinking density of the light adjustment layer 10.
  • the electron beam source is not particularly limited, and various electron beam accelerators such as Cockroft-Walton type, Vandegraft type, resonant transformer type, insulated core transformer type, linear type, dynamitron type, and high frequency type are used. be able to.
  • various electron beam accelerators such as Cockroft-Walton type, Vandegraft type, resonant transformer type, insulated core transformer type, linear type, dynamitron type, and high frequency type are used. be able to.
  • ultraviolet rays When using ultraviolet rays as the ionizing radiation, it is sufficient to emit light containing ultraviolet rays with a wavelength of 190 nm to 380 nm.
  • the ultraviolet light source include, but are not limited to, high-pressure mercury lamps, low-pressure mercury lamps, metal halide lamps, carbon arc lamps, and the like.
  • the transparent base layer 20 is provided on the lower surface 102 of the light adjustment layer 10.
  • the transparent base material layer 20 has the functions of light transmittance, chemical resistance of the interference pigment print layer 30, and scratch resistance of the colored coating film. Thereby, the transparent base material layer 20 can transmit the light emitted from the light source 2 when the light source 2 is placed on the back side of the laminate 1A, and also improves the design of the interference pigment printing layer 30. Can be properly protected.
  • the transparent base material layer 20 has light transmittance, but even if it is colored, as long as the design based on the interference pigment printed layer 30 is visible when the light source 2 is turned on when the laminate 1A is observed from the surface side. good.
  • the transparent base layer 20 may contain a matting agent such as silica, a coloring agent, and the like.
  • a matting agent such as silica, a coloring agent, and the like.
  • the colorant the colorant exemplified in the above-mentioned light adjustment layer 10 can be used.
  • the transparent base layer 20 may be made of a material that makes the laminate 1A suitable for two-dimensional and three-dimensional molding, has light transparency, and can appropriately protect the interference pigment printing layer 30 and the smoke layer 40.
  • a material that makes the laminate 1A suitable for two-dimensional and three-dimensional molding has light transparency, and can appropriately protect the interference pigment printing layer 30 and the smoke layer 40.
  • the material used for the transparent base layer 20 for example, a light-transmitting resin, a light-transmitting elastomer, glass, etc. can be used.
  • Examples of light-transmitting resins include polyester resins; polyethylene terephthalate (PET) resins; acrylic resins; polyolefin resins such as polypropylene and polyethylene; polycarbonate resins; vinyl chloride resins; polybutylene terephthalate (PBT) resins. , triacetylcellulose resin, styrene resin, acrylonitrile-butadiene-styrene (ABS) resin, bioengineering plastic, and biodegradable plastic. These may be used alone or in combination of two or more.
  • the transparent base material layer 20 may be composed of a composite of two or more of the above light-transmitting resins, for example, a composite of an acrylic resin, a bioengineering plastic, or a biodegradable plastic and an acrylic resin. Preferably, it is a composite layer.
  • the transparent base material layer 20 may be configured by laminating two or more layers of the above-mentioned light-transmitting resins, for example, it may be a laminate including a layer made of acrylic resin and a layer made of ABS resin, A laminate including a layer made of acrylic resin and a layer made of polycarbonate resin may be used.
  • thermoplastic elastomer can be used as the optically transparent elastomer.
  • thermoplastic elastomers include amide TPE (TPA), ester TPE (TPC), olefin TPE (TPO), styrene TPE (TPS), and urethane TPE (TPU).
  • the transparent base material layer 20 may be formed by laminating a resin layer having light transmittance and a layer made of an elastomer having light transmittance.
  • the thickness of the transparent base layer 20 is not particularly limited, but is preferably from 50 ⁇ m to 1300 ⁇ m, for example, from the viewpoint of having light transmittance.
  • the transparent base layer 20 may be subjected to an oxidation method, a roughening method, etc. on at least one surface of the upper surface 201 and the lower surface 202, which is the second main surface, as necessary.
  • a physical or chemical surface treatment may be applied.
  • the oxidation method include excimer UV treatment, corona discharge treatment, plasma treatment, chromium oxidation treatment, flame treatment, hot air treatment, and ozone ultraviolet treatment.
  • the roughening method include a sandblasting method and a solvent treatment method. These surface treatment methods are appropriately selected depending on the type of resin constituting the transparent base layer 20, but from the viewpoint of effectiveness and operability, excimer UV treatment and corona discharge treatment are preferred. .
  • interference pigment printing layer 30 As shown in FIG. 3, an interference pigment printing layer 30 is provided on the lower surface 202 of the transparent substrate layer 20.
  • the interference pigment printing layer 30 is a printing layer made by mixing interference pigments that express four colors: red, green, blue, and silver. Note that the interference pigments to be mixed are not limited to four colors, but may be any two or three colors of red, green, blue, and silver, and include colors other than red, green, blue, and silver, such as white. Five or more colors may be used.
  • the interference pigment printing layer 30 includes particulate interference pigments 31 in four colors of red, green, blue, and silver, a binder resin 32, and contains an ultraviolet absorber as an additive.
  • the interference pigment printing layer 30 can be formed using an ink composition obtained by additively mixing particles of interference pigments 31 of four colors: red, green, blue, and silver.
  • the interference pigments 31 include a red interference pigment 31R that emits red interference light, a green interference pigment 31G that emits green interference light, a blue interference pigment 31B that emits blue interference light, and a silver interference pigment. It contains a silver interference pigment 31S that emits light.
  • the interference pigment printing layer 30 has one or more types of interference pigments depending on the types of the interference pigments 31R, 31G, 31B, and 31S and the color mixture produced by the content of each of the interference pigments 31R, 31G, 31B, and 31S. It includes a pigment printing layer 30-N (N is an integer of 1 or more). This embodiment includes a first interference pigment printed layer 30-1, a second interference pigment printed layer 30-2, and a third interference pigment printed layer 30-3.
  • the first interference pigment printing layer 30-1, the second interference pigment printing layer 30-2, and the third interference pigment printing layer 30-3 all emit interference light of four colors (red, green, blue, and silver).
  • the binder resin 32 contains four types of interference pigments 31 together with an ultraviolet absorber.
  • the first interference pigment printing layer 30-1 is formed by additively mixing the amounts of interference light from four types of interference pigments 31 at a predetermined ratio, so that the "dark brown” of the wood grain pattern is created by the first color mixture. It is expressed as.
  • the second interference pigment printing layer 30-2 develops "light brown” with a wood grain pattern as a second mixed color by additively mixing the amounts of interference light from the four types of interference pigments 31 at a predetermined ratio.
  • the third interference pigment printing layer 30-3 develops the "brown" of the wood grain pattern as a third mixed color by additively mixing the amounts of interference light from the four types of interference pigments 31 at a predetermined ratio.
  • the three color mixtures are the first interference pigment print layer 30-1, the second interference pigment print layer 30-2, and the third interference pigment print layer 30-3. , as shown in FIG. 3, are not formed on the same surface but are formed in a layered manner; however, in this embodiment, for convenience of explanation, as shown in FIG. 3, the first interference pigment printed layer 30-1, The description will be made assuming that the second interference pigment printing layer 30-2 and the third interference pigment printing layer 30-3 are formed on the same surface. Furthermore, at least one of the first interference pigment printing layer 30-1, the second interference pigment printing layer 30-2, and the third interference pigment printing layer 30-3 may be configured by laminating a plurality of layers.
  • the dark brown developed in the first interference pigment printed layer 30-1, the light brown developed in the second interference pigment printed layer 30-2, and the dark brown developed in the third interference pigment printed layer 30-3 are interference This can be achieved by adjusting the blending ratio of each of the pigments 31R, 31G, 31B and 31S.
  • the four color interference pigments 31R, 31G, 31B, and 31S included in the first interference pigment printing layer 30-1 and the second interference pigment printing layer 30-2 may be of the same type or different types.
  • the four color interference pigments 31R, 31G, 31B and 31S included in the first interference pigment print layer 30-1 and the second interference pigment print layer 30-2 are of different types, interference of the same color (for example, red) Even if the interference pigments 31 emit light, the frequency of the interference light may be shifted, and the interference pigments 31 may be pigments that emit the same color (for example, red) or different colors (for example, blue).
  • the first interference pigment printed layer 30-1 and the second interference pigment printed layer 30-2 have different planar shapes.
  • a wood grain pattern design as shown in FIG. 1 is expressed on the surface of the interference pigment printing layer 30. There is.
  • FIG. 4 is a diagram schematically showing an example of the cross-sectional structure of the interference pigment 31.
  • the interference pigment 31 has a core portion 311 and a thin shell portion 312 that covers the core portion 311.
  • the core portion 311 and the shell portion 312 transmit any visible light depending on the wavelength.
  • the core portion 311 and the shell portion 312 are made of materials with different refractive indexes.
  • the core portion 311 is formed of a material having a smaller refractive index than the shell portion 312.
  • the incident light IL1 is reflected on the surface of the shell portion 312 and becomes reflected light RL1.
  • the light IL2 travels through the shell portion 312, is reflected by the core portion 311, and becomes reflected light RL2.
  • the reflected light RL1 and the reflected light RL2 interfere and strengthen each other, so that the interference light of a specific wavelength is strongly visible.
  • an interference pigment of a specific color for example, red
  • the laminate 1A includes the first interference pigment printed layer 30-1, the second interference pigment printed layer 30-2, and the third interference pigment printed layer 30-3, the light from the light source 2 will not pass through the laminate. It can be visually recognized from the surface 101 side of 1A.
  • the laminate 1A includes a light adjustment layer at a position closer to the surface of the laminate 1A than the first interference pigment printed layer 30-1, the second interference pigment printed layer 30-2, and the third interference pigment printed layer 30-3.
  • the light adjustment layer 10 has an optical function that reflects the light that is incident on the surface 101 of the light adjustment layer 10. That is, the light adjustment layer 10 has a reflective property for light incident on the surface 101, so that the amount of visible light reflected on the surface 101 and visually recognized on the surface side of the laminate 1A is reduced by the first interference pigment.
  • At least one of the amount of visible light representing the design (wood grain pattern) of the printed layer 30-1, the second interference pigment printed layer 30-2, and the third interference pigment printed layer 30-3, and the amount of light from the light source 2. can have reflective properties that increase the proportion of
  • the amount of visible light representing the design is the amount of visible light representing the design that combines the planar shapes of the first interference pigment print layer 30-1, the second interference pigment print layer 30-2, and the third interference pigment print layer 30-3. It is the amount of light.
  • the amount of light from the light source 2 is the amount of transmitted light that has passed through the first interference pigment print layer 30-1, the second interference pigment print layer 30-2, and the third interference pigment print layer 30-3.
  • the ultraviolet absorber contained as an additive in the interference pigment printing layer 30 has an absorption wavelength in the ultraviolet region, and specifically has a maximum absorption wavelength in a wavelength range of 315 nm to 400 nm or less. Since the interference pigment printing layer 30 contains an ultraviolet absorber, the interference pigment printing layer 30 can be formed by processing with a UV laser.
  • ultraviolet absorber for example, benzotriazole type, benzophenone type, triazine type, benzoate type, etc. can be used. These may be used alone or in combination of two or more.
  • benzotriazole ultraviolet absorbers examples include 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-di-t-butylphenyl)benzo Triazole, 2-(2'-hydroxy-3'-t-butyl-5'-methylphenyl)benzotriazole, 2-(3,5-di-t-pentyl-2-hydroxyphenyl-2-benzotriazole, 2- (2-benzotriazol-2-yl)-4-methyl-6-(3,4,5,6-tetrahydrophthalimidylmethyl)phenol, 2-(2-hydroxy-4-octyloxyphenyl)-2- Examples include benzotriazole compounds such as benzotriazole and 2-(2-hydroxy-5-t-octylphenyl)-2-benzotriazole.
  • benzophenone ultraviolet absorbers examples include 2-hydroxy-4-n-octoxy-benzophenone, 2-hydroxy-4-dodecyloxy-benzophenone, 2-hydroxy-4-octadecyloxy-benzophenone, and 2-hydroxy-4-benzophenone.
  • benzophenone compounds such as benzyloxy-benzophenone and 1,4-bis(4-benzoyl-3-hydroxyphenoxy)-butane.
  • triazine-based ultraviolet absorbers examples include 2,4-bis[2-hydroxy-4-butoxyphenyl]-6-(2,4-dibutoxyphenyl)-1,3,5-triazine, 2,4- diphenyl-6-(2-hydroxy-4-methoxyphenyl)-1,3,5-triazine, 2,4-diphenyl-6-(2-hydroxy-4-ethoxyphenyl)-1,3,5-triazine, 2,4-diphenyl-(2-hydroxy-4-propoxyphenyl)-1,3,5-triazine, 2,4-diphenyl-(2-hydroxy-4-butoxyphenyl)-1,3,5-triazine, 2,4-diphenyl-6-(2-hydroxy-4-butoxyphenyl)-1,3,5-triazine, 2-(2-hydroxy-4-[1-octyloxycarbonylethoxy]phenyl)-4,6 -bis(4-phenylphenyl)-1,3,5-triazine, 2,4-
  • benzoate-based ultraviolet absorbers examples include 2,4-di-t-butylphenyl-3,5-di-t-butyl-4-hydroxybenzoate and hexadecyl-3,5-di-t-butyl-4 -benzoate compounds such as hydroxybenzoate.
  • the binder resin 32 has a function of fixing the interference pigment 31 to the transparent base layer 20 inside, and has light transmittance.
  • a binder resin for example, a polyisocyanate resin, a resin having light transmittance of the transparent base layer 20, etc. can be used.
  • the interference pigment printing layer 30 has a first light transmitting portion 33 having light transmittance.
  • the first light transmitting portion 33 is an area that does not contain the interference pigment 31 and is not printed.
  • the first light transmitting portion 33 can be formed by a coating film removal portion 331 that is a through hole provided in the interference pigment printing layer 30.
  • the coating film removal section 331 may contain a cured product of a filling resin composition having optical transparency. If a cured product of a light-transmitting filling resin composition is included in the coating film removal part 331, for example, a binder layer is provided between the molded product 110 (FIG. 6) and the laminate 1A, which will be described later. In this case, the filling resin composition having optical transparency can also be used as the resin constituting the binder layer.
  • the filling resin composition contained in the coating film removal section 331 includes, for example, acrylic resin, urethane resin, polyester resin, polyvinyl acetate resin, vinyl chloride resin, and vinyl chloride-vinyl acetate copolymer. It contains a transparent resin as a main material, and may contain additives to improve adhesive strength as an auxiliary material. Note that the main material refers to a material that accounts for half or more of the mass of the entire filling resin composition.
  • a general binder resin can be used as the filling resin composition.
  • a binder layer is provided between a molded article 110 (FIG. 6) and a laminate 1A, which will be described later, the binder constituting the binder layer can be used.
  • Resin can be used.
  • the first light transmitting portion 33 may be formed in any appropriate shape, such as a polygon such as a circle, an ellipse, or a quadrangle, in plan view. Since the interference pigment printed layer 30 has high light transmittance in the first light transmitting part 33, when the light source 2 is turned on, the first light transmitting part 33 has a light transmittance that is higher than that of a filling resin composition such as a binder layer (not shown). The transmittance of the cured product can be increased to 70% to 98%. Further, when the light source 2 is turned off, the influence on the design visually recognized from the surface of the laminate 1A can be reduced.
  • a filling resin composition such as a binder layer
  • the first light transmitting portions 33 are arranged on the main surface 301 in an arbitrary arrangement such as a hexagonal lattice (also referred to as a regular triangular lattice or a houndstooth lattice), a square lattice, an orthorhombic lattice, a line, etc. may be placed.
  • a hexagonal lattice also referred to as a regular triangular lattice or a houndstooth lattice
  • a square lattice also referred to as a regular triangular lattice or a houndstooth lattice
  • an orthorhombic lattice a line, etc.
  • the first light transmitting portions 33 may be arranged substantially evenly on the main surface 301 at predetermined intervals in a plan view, or may be arranged irregularly. In order to provide the first light transmitting parts 33 with uniform light transmittance, it is preferable that the first light transmitting parts 33 are evenly arranged on the main surface 301 at predetermined intervals.
  • the proportion of the first light transmitting portion 33 is preferably 0.1% to 35%, more preferably 0.5% to 18%, and 1.0% in plan view of the interference pigment printed layer 30. % to 15% is more preferable. If the ratio of the first light transmitting portion 33 is within the above-mentioned preferable range, the interference pigment printing layer 30 can achieve both stealth property and high light transmittance.
  • the first light transmitting part 33 is formed by a coating film removal part 331 by laser processing or the like after forming the first interference pigment printing layer 30-1, the second interference pigment printing layer 30-2, and the third interference pigment printing layer 30-3.
  • a filling resin composition including a main material and an auxiliary material, such as a transparent binder resin is applied to the coating film removal part 331 by a general coating method and dried, or melted by heat.
  • a filling resin composition having optical transparency can be obtained by applying and solidifying a transparent filling resin composition using a general coating method, or by injection molding a molding resin having optical transparency. It can be formed by filling.
  • Examples of methods for applying the filling resin composition include roll coating, screen coating, gravure coating, spin coating, reverse coating, kiss coating, bar coating, blade coating, flow coating, air knife coating, dip coating, and spray coating. Conventional coating methods can be used.
  • the interference pigment printing layer 30 may be, for example, a metal thin film layer formed of metal so as to transmit light.
  • the metal thin film layer is formed, for example, by vapor depositing a metal.
  • a smoke layer 40 is provided on the lower surface 302 of the interference pigment printing layer 30.
  • the smoke layer 40 has a light transmittance within a predetermined range (for example, the smoke layer 40 alone has a light transmittance of 1% to 70%, preferably 1% to 47%).
  • the smoke layer 40 makes the design of the interference pigment printing layer 30 more visible to increase the visibility and distinguishability of the design and improve the display quality, and when the light source 2 is turned on, the smoke layer 40 includes the paint film removal part 331.
  • the entire laminate 1A has a function of having light transmittance within a predetermined range (30% to 50%). Further, the smoke layer 40 has a function of making the boundary between the opening 51 of the black layer 50 and the light shielding part 52 more difficult to see.
  • the smoke layer 40 can be formed, for example, by printing an ink composition containing a pigment or dye of a light-reducing color (for example, black) and an ultraviolet absorber in a transparent binder resin.
  • a layer formed by printing a black ink composition can be used.
  • the smoke layer 40 may be, for example, a metal thin film layer formed of metal so as to transmit light.
  • the metal thin film layer is formed, for example, by vapor depositing a metal.
  • the smoke layer 40 has a second light transmitting portion 41 having light transmittance.
  • the second light transmitting part 41 is an area that does not contain the interference pigment 31 and is not printed.
  • the second light transmitting portion 41 is disposed at a position where at least a portion thereof overlaps with the first light transmitting portion 33 in a plan view of the main surface of the smoke layer 40. It is preferable that the second light transmitting section 41 is disposed on the main surface of the smoke layer 40 at substantially the same position as the first light transmitting section 33 in plan view. Note that the term "substantially the same position” includes the same position or a position that is slightly shifted but can be regarded as the same position.
  • the second light transmitting part 41 can be formed by the coating film removing part 411 of the smoke layer 40, similar to the interference pigment printing layer 30, and the second light transmitting part 41 can be formed by the coating film removing part 411 of the smoke layer 40. It is preferable that a cured product is included.
  • a transparent filling resin composition to be filled in the coating film removal part 331 can be used as the light-transmitting filling resin composition contained in the second light-transmitting part 41.
  • the transparent filling resin composition may be included only in the coating removal section 331 of the interference pigment printed layer 30 or the coating removal section 411 of the smoke layer 40, or may be included in only one of the coating removal sections 331 and 411. It may be included only in the section.
  • the shape and arrangement of the second light transmitting section 41 may be the same shape and arrangement as the first light transmitting section 33, or may be a different shape and arrangement. In order to make it easier for the light from the light source 2 to pass through the interference pigment printed layer 30 and the smoke layer 40, the shape and arrangement of the second light transmitting section 41 may be the same as the shape and arrangement of the first light transmitting section 33. preferable.
  • the second light transmitting section 41 can be formed by a method such as laser processing, similarly to the first light transmitting section 33.
  • the proportion of the second light transmitting section 41 is the same as that of the first light transmitting section 33.
  • the ratio of the first light transmitting section 33 and the second light transmitting section 41 is as follows.
  • the ratio is preferably 0.1% to 20%, and more preferably 0.5% to 18%, similar to the ratio of the first light transmitting portion 33. It is preferably 1.0% to 15%, more preferably 1.0% to 15%.
  • the light transmittance of the laminated portion of the interference pigment printed layer 30 and the smoke layer 40 that is, the light transmission of the laminated portion of the interference pigment printed layer 30 and the smoke layer 40 in the portion having the first light transmitting portion 33 and the second light transmitting portion 41.
  • the ratio is preferably 23% to 51%, more preferably 33% to 41%.
  • the light transmittance of the portion of the interference pigment printed layer 30 that does not have the first light transmitting portion 33 is about 85%
  • the light transmittance of the portion of the interference pigment print layer 30 that has the first light transmitting portion 33 is approximately 85%. It is about 86%.
  • the light transmittance of the portion of the smoke layer 40 that does not have the second light transmitting portion 41 is approximately 47%, and the light transmittance of the portion of the smoke layer 40 that does have the second light transmitting portion 41 is approximately 53%.
  • the light transmittance of the laminated portion of the interference pigment print layer 30 and the smoke layer 40 in the portion not having the first light transmitting portion 33 and the second light transmitting portion 41 is preferably 18% to 46%, and preferably 28% to 36%. % is more preferable.
  • the interference pigment printed layer 30, the smoke layer 40, and the laminated portions of the interference pigment printed layer 30 and the smoke layer 40 each have the above-mentioned light transmittance, so that the first light transmitting portion 33 and the second light transmitting portion 41
  • the light transmittance of the laminated portion of the interference pigment printing layer 30 and the smoke layer 40 can be adjusted to 23% to 51%.
  • the sum of the thicknesses of the laminated portions of the interference pigment printing layer 30 and the smoke layer 40 is preferably 1 ⁇ m to 50 ⁇ m, more preferably 10 ⁇ m to 30 ⁇ m.
  • the black layer 50 is provided on the lower surface 401 of the smoke layer 40.
  • the black layer 50 has a shape corresponding to a pattern to be displayed, and has an opening 51 through which light from the light source 2 passes, and a light shielding part 52 located around the opening 51 and having a light shielding property.
  • the opening 51 is formed in a rectangular shape in cross-sectional view, it may be formed in a trapezoidal shape. Since the opening 51 is formed into a trapezoidal shape, the lower surface (lower side in FIG. 3) of the black layer 50 may be formed inside the opening 51 depending on the material, type, etc. of the molded product 110 (see FIG. 6) to be installed. The molded product 110 (see FIG. 6) can easily fit in without creating a gap.
  • the black layer 50 is different from the smoke layer 40 except that the content of a pigment or dye of a light-attenuating color (for example, black) used for forming the smoke layer 40 is increased so that the light transmittance becomes approximately zero. It can be formed similarly.
  • a layer formed by printing a black ink composition can be used as the black layer 50.
  • the black layer 50 may be, for example, a conductive metal layer made of a metal with low light transmittance.
  • the metal layer is formed, for example, by a general method of applying a conductive paint such as screen coating.
  • the laminate 1A includes the light adjustment layer 10, the transparent base layer 20, the interference pigment printing layer 30, and the smoke layer 40.
  • the light adjustment layer 10 has, on its lower surface 102, an uneven portion 11 formed to correspond to the shape of the design represented by the interference pigment printing layer 30. Therefore, the light adjustment layer 10 can express the design displayed on the interference pigment printed layer 30 with the uneven portions 11 and provide a tactile feel that matches the design, and can diffusely reflect visible light incident from the outside. Due to the refraction and scattering effects, the boundary between the first light transmitting portion 33 of the interference pigment printing layer 30, the second light transmitting portion 41 of the smoke layer 40, and the black layer 50 can be made inconspicuous.
  • the interference pigment printing layer 30 and the smoke layer 40 each have a first light transmitting section 33 and a second light transmitting section 41. Therefore, the interference pigment printed layer 30 and the smoke layer 40 are such that when the light source 2 is turned off, the light source 2 arranged on the back side of the laminate 1A and the end face of the opening 51 cannot be visually recognized from the front side of the decorative laminate. It is possible to improve the overall light transmittance of the laminate 1A to 30% to 50% while exhibiting the stealth property that suppresses the light and the light transmittance that allows the light from the light source 2 to pass through when turned on.
  • the laminate 1A can transmit the light from the light source 2 more efficiently and display a clear image without increasing the brightness of the light source 2, so the overall brightness can be reduced.
  • the design of the interference pigment printing layer 30 can be expressed.
  • the interference pigments 31 of four colors (red, green, blue, silver) included in the interference pigment printing layer 30 are special pigments that can express colors by combining with a layer having black, such as the smoke layer 40.
  • the interference pigment printing layer 30 includes interference pigments 31 of four colors (red, green, blue, silver), a transparent binder resin 32, and an ultraviolet absorber, thereby forming a coating film removal part that forms a first light transmitting part 33.
  • the portion where 331 is not formed can exhibit, for example, a light transmittance of about 33% to 41%, and a total light transmittance of about 79% (of which, the diffused light transmittance is about 33%).
  • the interference pigment printing layer 30 can exhibit, for example, a light transmittance of about 76 to 86% in the first light transmitting portion 33, and a total light transmittance of 80% (of which, the diffuse light transmittance is 42%). I can demonstrate it.
  • the smoke layer 40 is an ink composition containing a black pigment, an ultraviolet absorber, and a binder resin. It has a reduced light transmittance.
  • the smoke layer 40 can have a predetermined light transmittance (for example, about 40%).
  • the smoke layer 40 has the second light transmitting portion 41 on its main surface, so that it is not visually recognized, has a predetermined light transmittance (for example, 30% to 40%), and has a light transmittance when the light is turned off. It is possible to exhibit stealth property that suppresses the visibility of the light source 2 and light transmittance that allows the light from the light source 2 to pass through when the light source 2 is turned on.
  • the laminate 1A has sufficient stealth properties to make the light source 2 and the opening 51 of the black layer 50 disposed on the back side of the molded product invisible from the surface of the laminate 1A when the light source 2 is turned off.
  • the light emitted from the light source 2 can be transmitted and displayed with high brightness without increasing the brightness of the light source 2 when the light source 2 is turned on, and the visibility when the light source 2 is turned on can be improved by increasing the diffuse transmittance.
  • the laminate 1A can eliminate variations in the overall light transmittance of the laminate 1A by adjusting the ratio of the light transmittance of each of the first light transmitting section 33 and the second light transmitting section 41. Can be made smaller.
  • the interference pigment printed layer 30 has variations in layer thickness between the area where the first light transmitting part 33 is not formed, that is, the area where no printing is performed, and the area where the first light transmitting part 33 is formed. This tends to cause a difference in light transmittance between relatively thick and thin parts of the layer.
  • the laminate 1A can reduce variations in overall light transmittance, it has stealth properties that suppress the visibility of the light source 2 when the lights are off, and suppresses variations in light transmittance that transmits the light from the light sources 2 when the lights are on. able to demonstrate.
  • the first light transmitting part 33 and the second light transmitting part 41 can be formed by the coating film removed parts 331 and 411 of the interference pigment printing layer 30 and the smoke layer 40. Since the interference pigment 31 is not present in the paint film removed parts 331 and 411, the paint film removed parts 331 and 411 have high light transmittance. Furthermore, the paint film removal parts 331 and 411 can be formed in any desired shape and number by laser processing or the like at any location. In the laminate 1A, in a plan view of the interference pigment printed layer 30 and the smoke layer 40, the first light transmitting part 33 and the second light transmitting part 41 are printed with the interference pigment at arbitrary locations on the interference pigment printed layer 30 and the smoke layer 40.
  • the layer 30 and the smoke layer 40 can be formed to have a predetermined light transmittance (eg, 30% to 50%). Therefore, the laminated body 1A sufficiently secures the stealth property that suppresses the visibility of the light source 2 when the light source 2 is turned off, and also stably emits the light from the light source 2 at high brightness without increasing the brightness of the light source 2 when the light source 2 is turned on. Transparent display can be performed, and the diffused transmittance can be increased to stably improve visibility when turned on.
  • a predetermined light transmittance eg, 30% to 50%. Therefore, the laminated body 1A sufficiently secures the stealth property that suppresses the visibility of the light source 2 when the light source 2 is turned off, and also stably emits the light from the light source 2 at high brightness without increasing the brightness of the light source 2 when the light source 2 is turned on.
  • Transparent display can be performed, and the diffused transmittance can be increased to stably improve visibility when turned on.
  • the laminate 1A can include a cured product of a transparent filling resin composition in the coating film removal parts 331 and 411 that constitute the first light transmitting part 33 and the second light transmitting part 41.
  • the coating film removal parts 331 and 411 can maintain high light transmittance while dispensing the filling resin composition in the case where a binder layer is provided between the molded product 110 (FIG. 6) and the laminate 1A, which will be described later. It can also be used as the resin constituting the binder layer. Therefore, the laminate 1A can stably maintain the overall light transmittance at a desired light transmittance (for example, 30% to 50%), and also has stealth properties that suppress the visibility of the light source 2 when the light is turned off.
  • a desired light transmittance for example, 30% to 50%
  • the light transmittance that allows light from the light source 2 to pass through during lighting can be stably maintained. Therefore, the laminate 1A has sufficient stealth properties to suppress the visibility of the light source 2 and the end face of the opening 51 of the black layer 50 when the light source 2 is turned off.
  • the emitted light can be transmitted and displayed continuously at high brightness, and the diffused transmittance can be increased to further stably improve visibility when the light is turned on.
  • the laminate 1A has a light-shielding black layer 50 on the lower surface 401 of the smoke layer 40, and the black layer 50 can have an opening 51.
  • the opening 51 is formed so that a region of the lower surface 401 of the smoke layer 40 including the second light transmitting section 41 is exposed.
  • the black layer 50 allows almost no light from the light source 2 to pass through the light shielding portion 52 . Therefore, the laminate 1A allows the light emitted from the light source 2 to pass through only the opening 51, and allows the light to pass through the area including the second light transmitting section 41 of the smoke layer 40, so that the black layer with a light blocking function is formed.
  • the stealth property of the aperture 51 of 50 is ensured, and the light emitted from the light source 2 can be emitted from the inside of the aperture 51 with high brightness without increasing the brightness of the light source 2 when the light source 2 is turned on.
  • the first light transmitting section 33 and the second light transmitting section 41 are provided at substantially the same position in a plan view of the laminate 1A, and the ratio of the first light transmitting section 33 and the second light transmitting section 41 is adjusted by interference.
  • a plan view of the pigment printing layer 30 it can be set to 0.1% to 20%.
  • the laminate 1A can reliably have a light transmittance of 30% to 40% as a whole, and has a stealth property that suppresses the visibility of the light source 2 when the light is off, and a light transmittance that allows the light from the light source 2 to pass through when the light is on. You can definitely demonstrate your sexuality.
  • the laminate 1A has sufficient stealth properties to suppress the visibility of the light source 2 and the end face of the opening 51 of the black layer 50 when the light source 2 is turned off.
  • the emitted light can be more reliably transmitted and displayed with high brightness, and the diffused transmittance can be increased to improve visibility when the light is turned on.
  • the first light transmitting portion 33 and the second light transmitting portion 41 are arranged in a hexagonal lattice shape, a square lattice shape, an orthorhombic lattice shape, or a line shape in a plan view of the interference pigment printed layer 30 and the smoke layer 40. can be placed.
  • the first light transmitting section 33 and the second light transmitting section 41 can be easily formed in any desired location and in any desired shape, so that the printed layer in which the interference pigment printed layer 30 and the smoke layer 40 are laminated is , can be easily controlled to have a light transmittance of 30% to 50%.
  • the laminate 1A can easily be controlled so that the overall light transmittance of the laminate 1A is 30% to 40%, the laminate 1A has a stealth structure that suppresses visibility of the light source 2 and the end face of the opening 51 of the black layer 50 when the light is turned off.
  • the laminate 1A has a stealth structure that suppresses visibility of the light source 2 and the end face of the opening 51 of the black layer 50 when the light is turned off.
  • To make it easy to ensure the brightness of the light source 2 to make it easy to stably transmit and display the light emitted from the light source 2 at high brightness without increasing the brightness of the light source 2 when the light source 2 is turned on, and to make it easy to improve the visibility when the light source 2 is turned on. I can do it.
  • the sum of the thicknesses of the interference pigment printing layer 30 and the smoke layer 40 can be 1 ⁇ m to 50 ⁇ m. If the sum of the thicknesses is within the above range, the laminate 1A can reliably exhibit the functions of the interference pigment printing layer 30 and the smoke layer 40. Therefore, the printed layer in which the interference pigment printed layer 30 and the smoke layer 40 are laminated can reliably exhibit a light transmittance of 30% to 50%. Therefore, the laminate 1A facilitates ensuring the stealth property of suppressing the visibility of the light source 2 and the end face of the opening 51 of the black layer 50 when the light is off, and also stabilizes the light transmittance of the light emitted from the light source 2 when the light is turned on.
  • the light emitted from the light source 2 can be stably and reliably transmitted and displayed at a high brightness, and the visibility when the light source 2 is turned on can be improved. can be increased.
  • the laminate 1A Since the laminate 1A has the above characteristics, it can be effectively used as a surface layer for displaying and decorating light emitted from a light source in molded products, display devices, and the like.
  • the laminate 1A may include a pigment printing layer containing an ultraviolet absorber and a base smoked white layer instead of the interference pigment printing layer 30 and the smoke layer 40.
  • FIG. 5 is a cross-sectional view of another example of the structure of the laminate according to the present embodiment, taken along line AA in FIG.
  • the laminate 1B includes a light adjustment layer 10, a transparent base material layer 20, a pigment printing layer 60, a smoked white base layer 70, and a black layer 50, which are laminated in this order.
  • the pigment printing layer 60 is a printing layer made by mixing pigments 61 expressing four colors of cyan, magenta, yellow, and black, and is a printing layer made by mixing pigments 61 that express four colors of cyan, magenta, yellow, and black, and has a plurality of types (four colors of cyan, magenta, yellow, and black) in the form of particles.
  • the binder resin 62 contains a pigment 61 and an ultraviolet absorber as an additive, and has a visually recognizable design and light scattering properties.
  • the pigment 61 to be mixed is not limited to four colors, and may be any two or three colors of cyan, magenta, yellow, and black, or may be five or more colors including cyan, magenta, yellow, black, white, etc. .
  • a white pigment for example, the above-mentioned interference pigment and a pigment having a scattering effect such as silica can be used as a pigment capable of expressing white color with high light transmittance.
  • the pigment 61 may include a cyan pigment 61C, a magenta pigment 61M, a yellow pigment 61Y, and a black pigment 61K.
  • a cyan pigment 61C a magenta pigment 61M
  • a yellow pigment 61Y a yellow pigment 61Y
  • a black pigment 61K a pigment 61K that commonly used pigments can be used.
  • the pigment-printed layer 60 has a plurality of types of pigment-printed layers 60-N depending on the types of pigments 61C, 61M, 61Y, and 61K and the color mixture developed by the respective contents of pigments 61C, 61M, 61Y, and 61K. (N is an integer of 1 or more).
  • N is an integer of 1 or more.
  • it includes a first pigment printed layer 60-1, a second pigment printed layer 60-2, and a third pigment printed layer 60-3.
  • the first pigment printed layer 60-1, the second pigment printed layer 60-2, and the third pigment printed layer 60-3 each have four types of light that emit light of four colors (cyan, magenta, yellow, and black).
  • a pigment 61 is included in the binder resin 32.
  • the first pigment printed layer 60-1, the second pigment printed layer 60-2, and the third pigment printed layer 60-3 are the first interference pigment printed layer 30-1, the second interference pigment printed layer 30- Similarly to the second and third interference pigment printing layers 30-3, the four types of pigments 61 are additively mixed at a predetermined ratio to create woodgrain patterns of "dark brown,” "light brown,” and “black.” , a first color mixture, a second color mixture, and a third color mixture.
  • the ultraviolet absorber and binder resin 62 contained in the pigment print layer 60 are the same as the ultraviolet absorber and binder resin 32 used in the interference pigment print layer 30, so the details will be omitted.
  • the pigment printing layer 60 has a third light transmitting portion 63 having light transmittance.
  • the third light transmitting portion 63 is an area that does not contain the pigment 61 and is not printed.
  • the third light transmitting portion 63 can be formed by a coating film removal portion 631 that is a through hole provided in the pigment printing layer 60.
  • the coating film removal portion 631 may contain a cured product of a filling resin composition having optical transparency.
  • the configurations of the third light transmitting portion 63 and the filling resin composition are the same as those of the first light transmitting portion 33 and the filling resin composition of the interference pigment printing layer 30, so the details will be omitted.
  • the shape, arrangement, ratio, and formation method of the third light transmitting section 63 may be the same as the shape, arrangement, and ratio of the first light transmitting section 33.
  • the third light transmitting part 63 may be formed in any suitable shape, such as a polygon such as a circle, an ellipse, or a quadrangle, in plan view. Similar to the first light transmitting section 33, the third light transmitting section 63 can be arranged in any appropriate arrangement such as a hexagonal lattice shape, a square lattice shape, an orthorhombic lattice shape, a line shape, etc. on the main surface 601 of the third light transmitting section 63. They may be arranged as shown in FIG. Like the first light transmitting part 33, the proportion of the third light transmitting part 63 is preferably 0.1% to 35%, and preferably 0.5% to 18%, in a plan view of the pigment printing layer 60. The content is more preferably 1.0% to 15%.
  • the third light transmitting section 63 can be formed in the same manner as the first light transmitting section 33, so the details will be omitted.
  • the base smoke white layer 70 is provided on the lower surface 602 of the pigment printing layer 60. Like the smoke layer 40, the base smoke white layer 70 has a light transmittance within a predetermined range (for example, the base smoke white layer 70 alone has a light transmittance of 1% to 70%, preferably 1% to 47%). have Therefore, like the smoke layer 40, the base smoke white layer 70 makes the design of the pigment print layer 60 more visible when the light source 2 is turned off, increases the visibility and distinguishability of the design, improves the display quality, and Sometimes, the entire laminate 1B including the paint film removal part 631 is within a predetermined range (for example, for the base smoke white layer 700 alone, it is 30% to 70%, preferably 53% to 70%, and the total is 30%). It has the function of having a light transmittance of ⁇ 50%).
  • the base smoke white layer 70 can be formed, for example, by printing an ink composition containing a pigment or dye of a light-reducing color (for example, white) and an ultraviolet absorber in a transparent binder resin.
  • a layer formed by printing a white ink composition can be used.
  • the base smoke white layer 70 has a fourth light transmitting portion 71 having light transmittance, similar to the pigment printing layer 60. Like the third light transmitting section 63, the fourth light transmitting section 71 is an area that does not contain the pigment 61 and is not printed. The fourth light transmitting portion 71 may be filled with a binder resin (not shown).
  • the arrangement of the fourth light transmitting section 71 may be the same as the arrangement of the second light transmitting section 41. That is, the fourth light transmitting section 71 is arranged at a position where at least a portion thereof overlaps with the third light transmitting section 63 in a plan view of the main surface of the base smoked white layer 70 . It is preferable that the fourth light transmitting portion 71 is disposed on the main surface of the base smoked white layer 70 at substantially the same position as the third light transmitting portion 63 in plan view.
  • the fourth light transmitting part 71 can be formed by the coating film removal part 711 of the base smoke white layer 70, like the pigment printing layer 60, and the cured material of the transparent filling resin composition is inside the coating film removal part 711. It is preferable to include.
  • the transparent filling resin composition contained in the fourth light transmitting part 71 the transparent filling resin composition to be filled in the coating film removal part 631 can be used.
  • the transparent filling resin composition may be included only in the paint film removal portion 631 of the pigment print layer 60 or the paint film removal portion 711 of the base smoke white layer 70, or may be included in the paint film removal portion 631 and 711 of the base smoke white layer 70. It may be included only in part.
  • the shape and arrangement of the fourth light transmitting section 71 may be the same shape and arrangement as the third light transmitting section 63, or may be a different shape and arrangement. In order to make it easier for the light from the light source 2 to pass through the pigment printing layer 60 and the base smoked white layer 70, the shape and arrangement of the fourth light transmitting section 71 should be the same as the shape and arrangement of the third light transmitting section 63. is preferred.
  • the fourth light transmitting section 71 can be formed by a method such as laser processing, similarly to the third light transmitting section 63.
  • the proportion of the fourth light transmitting section 71 is the same as that of the third light transmitting section 63.
  • the ratio of the third light transmitting portion 63 and the fourth light transmitting portion 71 is In a plan view of the printing layer 60 or the base smoked white layer 70, the proportion of the third light transmitting portion 63 is preferably 0.1% to 20%, more preferably 0.5% to 18%. It is preferably 1.0% to 15%, more preferably 1.0% to 15%.
  • the light transmittance of the laminated portion of the pigment printing layer 60 and the base smoke white layer 70 is preferably 23% to 51%, more preferably 33% to 41%.
  • FIG. 6 is a partially enlarged sectional view showing a part of the decorative molded product including the laminate 1A according to the present embodiment.
  • the decorative molded product 100 includes a molded product 110 and a laminate 1A attached to the surface of the molded product 110.
  • a binder layer may be provided on the surface of the molded product 110, and the back surface of the laminate 1A may be attached to the surface of the molded product 110 via the binder layer.
  • Examples of the molded product 110 include materials with high light transmittance.
  • Materials with high light transmittance include olefin resins, acrylic resins, styrene resins, vinyl resins, fluorine resins, engineering plastics, super engineering plastics, bioengineering plastics, biodegradable plastics, thermosetting resins, and Examples include glass. These materials may be used alone or in combination of two or more.
  • olefin resins examples include polyethylene resins such as polyethylene (PE), high density polyethylene, and low density polyethylene; polypropylene resins such as polypropylene (PP) and propylene-ethylene copolymers; cycloolefin polymers (COP), and cycloolefins.
  • polyethylene resins such as polyethylene (PE), high density polyethylene, and low density polyethylene
  • polypropylene resins such as polypropylene (PP) and propylene-ethylene copolymers
  • COP cycloolefin polymers
  • cycloolefin resins such as copolymers (COC) and ethylene-cyclic olefin copolymers.
  • COC copolymers
  • COP and COC ethylene-cyclic olefin copolymers
  • acrylic resin polymethyl methacrylate (PMMA).
  • styrene resin examples include polystyrene (PS), acrylonitrile styrene resin, and acrylonitrile butadiene styrene (ABS) resin.
  • PS polystyrene
  • ABS acrylonitrile butadiene styrene
  • vinyl resin examples include polyvinyl chloride (PVC) resin, vinylidene chloride resin, polyacrylonitrile, polyvinyl acetate, acrylic acid copolymer, and polyvinyl alcohol.
  • fluororesin examples include polytetrafluoroethylene (PTFE), polychlorotrifluoroethylene (PCTFE), polyvinyl fluoride resin, and polyvinylidene fluoride.
  • PC polycarbonate
  • POM polyacetal
  • PET polyethylene terephthalate
  • PBT polybutylene terephthalate
  • PPE polyphenylene ether
  • PA polyamide
  • super engineering plastics include polyphenylene sulfide (PPS) resin, polysulfone (PSF) resin, polyethersulfone (PES), polyetheretherketone (PEEK), polyarylate resin, aromatic polyester resin, and polyimide (PI). resin, polyamideimide (PAI) resin, polyetherimide (PEI) resin, and aramid resin.
  • Bioengineering plastics are made from plant-derived isosorbide (isosorbide) as the main raw material, and are copolymers of isosorbide and engineering plastics as copolymerization components.
  • Isosorbide is abundant as a plant-derived resource and is obtained by dehydration condensation of sorbitol, which is produced from various easily available starches.
  • Isosorbide is a secondary heterocyclic diol (dihydroxy compound) derived from plant materials such as starch and sugar.
  • Isosorbide does not have an aromatic structure in its molecular skeleton, but has a rigid condensed ring structure, so it can impart high heat resistance and rigidity to the derived resin.
  • a copolymer using isosorbide is amorphous, and the glass transition temperature can be adjusted by selecting the copolymerization components and copolymerization ratio.
  • the heterocyclic structure containing ether bonds activates the hydroxyl group and shows high acidity despite being a secondary diol, and by transesterifying with engineering plastics, a high molecular weight polymer that is a bioengineering plastic is obtained.
  • the polymerization method is a transesterification method or a melt polymerization method (melt method).
  • isosorbide as a catalyst for transesterification, Group 2 metals (salts) exhibiting relatively soft basicity, such as calcium and magnesium, exhibit high polymerization activity.
  • biodegradable plastics examples include polylactic acid (PLA), polyhydroxyalkanoate (PHA), polybutylene succinate (PBS), and polycaprolactone (PCL).
  • PLA polylactic acid
  • PHA polyhydroxyalkanoate
  • PBS polybutylene succinate
  • PCL polycaprolactone
  • thermosetting resins examples include epoxy resins, silicone resins, phenol resins, unsaturated polyester resins, and polyurethane resins.
  • the molded product 110 is preferably a composite containing an engineering plastic (particularly a PC resin), a bioengineering plastic, or a biodegradable plastic and a transparent resin.
  • the method for manufacturing the decorative molded product 100 is not particularly limited, and a general method of integrally molding the molded product 110 and the laminate 1A can be used.
  • the decorative molded product 100 can be obtained, for example, by simultaneously injection molding the molded product 110 and integrally molding the laminate 1A with the molded product 110 via a binder layer on the back surface thereof.
  • OCA optical transparent adhesive sheet
  • TOM molding vacuum-pressure bonding method
  • the decorative molded product 100 includes the laminate 1A in the molded product 110, thereby suppressing visibility of the light source 2 and the opening 51 of the black layer 50 from the surface side of the laminate 1A when the light source 2 is turned off.
  • the light emitted from the light source 2 can be transmitted and displayed with high brightness without increasing the brightness of the light source 2 when the light source 2 is turned on, and the diffused transmittance is increased to make it visible when the light source 2 is turned on. You can increase your sexuality.
  • the decorative molded product 100 can show the design of the surface of the laminate 1A when the lights are off, while clearly displaying characters etc. expressed by the light from the light source 2 on the surface of the laminate 1A when the lights are on. Can be easily recognized visually.
  • the decorative molded product 100 Since the decorative molded product 100 has the above-mentioned characteristics, it is suitable for, for example, vehicle interior parts such as front panels, center console rear center panels, and doors, architectural interior materials, home appliance casings, etc. Can be used.
  • a display device including a stacked body 1A according to this embodiment will be described. Note that here, a case where the display device is a front panel of a vehicle will be described.
  • FIG. 7 is a diagram illustrating an example of a plan view of a display device including a laminate according to an embodiment of the present invention, showing a state where the light is off and a state where the display device is on.
  • FIG. 8 is a partially enlarged cross-sectional view of a part of FIG. 7, and is a partially enlarged cross-sectional view showing a part of the display device including the laminate according to the present embodiment. Note that the layer structure of the laminate included in the display device is the same as the layer structure shown in FIG. 3 or FIG. 6 described above, so the layer structure of the laminate included in the display device is simply shown in FIG.
  • the display device 200 has a front panel 210, which is a decorative molded product in which a laminate 1A having a design consisting of a woodgrain pattern is attached to the surface of the molded product. As shown, a display section 220 is provided on the back surface of the front panel 210. Since the above-described decorative molded product 100 is used for the front panel 210, details of the front panel 210 will be omitted.
  • the display unit 220 is a display that has a plurality of light sources 221 that are light emitting units arranged in a matrix, and displays characters, numbers, images, etc. on the surface of the front panel 210.
  • the display section 220 is arranged so that the light emitted from the light source 221 passes through the front panel 210.
  • the light source 221 is not particularly limited, and for example, an LED, an LCD device, etc. can be used.
  • the display device 200 when the display unit 220 is off, only the wood grain pattern is visible on the surface of the laminate 1A of the front panel 210.
  • the display section 220 lights up, the light emitted from the display section 220 passes through the front panel 210, and images such as a map, driving route, time, temperature, speed, total distance traveled, etc. are displayed on the surface of the front panel 210. Is displayed.
  • the image is not limited to codes and figures for transmitting information, but may also be, for example, decorative patterns and signals.
  • the display device 200 includes a front panel 210 and a display section 220, and since the front panel 210 includes the laminate 1A, the display section 220 can be viewed from the front side of the laminate 1A when the light source 2 is turned off.
  • the display screen emitted from the display unit 2202 can be transmitted and displayed at high brightness without increasing the brightness of the display unit 220, and the diffused transmittance is increased. The visibility when the light is turned on can be improved, and the driver and other people inside the vehicle can easily see the light.
  • the interference pigment printing layer has a first light transmitting portion through which the light can pass through the interference pigment printing layer,
  • the black semi-transparent printed layer has a second light-transmissive part through which the light can
  • Decorative laminate ⁇ 2> The first light transmitting part and the second light transmitting part are described in ⁇ 1>, wherein the first light transmitting part and the second light transmitting part are coating film removal parts formed on the main surfaces of the interference pigment printing layer and the black translucent printing layer, respectively.
  • Decorative laminate ⁇ 3> The decoration according to ⁇ 2>, wherein at least one of the first light transmitting part and the second light transmitting part includes a cured product of a filling resin composition having light transmittance in the coating film removal part. laminate for use.
  • a black symbol printing layer is provided on the surface of the black translucent printing layer opposite to the interference pigment printing layer,
  • the decorative laminate according to any one of ⁇ 1> to ⁇ 3>, wherein the black symbol printing layer has an opening formed so that a region including the second light transmitting portion is exposed.
  • the first light transmitting section and the second light transmitting section are at substantially the same position in a plan view, Any one of ⁇ 1> to ⁇ 4>, wherein the ratio of the first light transmitting part to the second light transmitting part is 0.1% to 20% in a plan view of the interference pigment printed layer.
  • ⁇ 6> Any one of ⁇ 1> to ⁇ 5>, wherein at least one of the first light transmitting section and the second light transmitting section is arranged in a hexagonal lattice shape, a square lattice shape, an orthorhombic lattice shape, or a line shape.
  • ⁇ 7> The decorative laminate according to any one of ⁇ 1> to ⁇ 6>, wherein the sum of the thicknesses of the interference pigment printing layer and the black translucent printing layer is 1 ⁇ m to 50 ⁇ m.
  • a decorative laminate through which light emitted from a light source passes a base material that is optically transparent and has a first main surface and a second main surface opposite to the first main surface; a light adjustment layer provided on the first main surface side of the base material; Provided on the second main surface side of the base material, containing multiple types of pigments and ultraviolet absorbers in a binder resin, exhibiting a visible design, and having light refraction, light reflection, or light scattering properties.
  • the pigment-printed layer is a decorative laminate having a third light-transmitting portion on the main surface of the pigment-printed layer through which the light can pass.
  • a base smoke white layer provided on the opposite side of the pigment printing layer from the base material and containing a pigment and an ultraviolet absorber in a binder resin;
  • the base smoke white layer has a fourth light transmitting part through which the light can pass, on the main surface of the base smoke white layer, at a position that at least partially overlaps with the third light transmitting part in plan view.
  • the third light transmitting portion and the fourth light transmitting portion are coating film removal portions formed on the main surfaces of the pigment printing layer and the base smoke white layer, respectively.
  • Decorative laminate ⁇ 11> The decoration according to ⁇ 10>, wherein at least one of the third light transmitting part and the fourth light transmitting part includes a cured product of a filling resin composition having light transmittance in the coating film removal part. laminate for use.
  • a black symbol printing layer is provided on the surface of the base smoke white layer opposite to the pigment printing layer, The decorative laminate according to any one of ⁇ 9> to ⁇ 11>, wherein the black symbol printing layer has an opening formed so that a region including the light-transmitting portion of the base smoked white layer is exposed. body.
  • the third light transmitting section and the fourth light transmitting section are at substantially the same position in plan view, According to any one of ⁇ 9> to ⁇ 12>, wherein the ratio of the third light transmitting part to the fourth light transmitting part is 0.1% to 20% in a plan view of the pigment printing layer.
  • ⁇ 15> The decorative laminate according to any one of ⁇ 9> to ⁇ 14>, wherein the sum of the thicknesses of the pigment printing layer and the base smoke white layer is 1 ⁇ m to 50 ⁇ m.
  • Molded product The decorative laminate according to any one of ⁇ 1> to ⁇ 15>, which is provided on at least a portion of the surface of the molded product; Decorative molded product with ⁇ 17> The decorative molded product according to ⁇ 16>, a light source placed on the back side of the decorative molded product;
  • a display device comprising:

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PCT/JP2022/046255 2022-03-24 2022-12-15 加飾用積層体、加飾成形品及び表示装置 Ceased WO2023181530A1 (ja)

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KR1020247029912A KR20240146678A (ko) 2022-03-24 2022-12-15 가식용 적층체, 가식 성형품 및 표시 장치
CN202280091816.2A CN118695947A (zh) 2022-03-24 2022-12-15 装饰用层叠体、装饰成形品及显示装置
DE112022006892.2T DE112022006892T5 (de) 2022-03-24 2022-12-15 Dekoratives laminat, dekoratives formteil und anzeigevorrichtung
JP2024509756A JP7683856B2 (ja) 2022-03-24 2022-12-15 加飾用積層体、加飾成形品及び表示装置
US18/888,598 US12270539B2 (en) 2022-03-24 2024-09-18 Decorative laminate, decorative molded article, and display device

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