WO2023163192A1 - Feuille décorative, élément décoratif, système d'affichage, procédé de fabrication de plaque, procédé de fabrication de feuille décorative et procédé de fabrication d'élément décoratif - Google Patents

Feuille décorative, élément décoratif, système d'affichage, procédé de fabrication de plaque, procédé de fabrication de feuille décorative et procédé de fabrication d'élément décoratif Download PDF

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Publication number
WO2023163192A1
WO2023163192A1 PCT/JP2023/007175 JP2023007175W WO2023163192A1 WO 2023163192 A1 WO2023163192 A1 WO 2023163192A1 JP 2023007175 W JP2023007175 W JP 2023007175W WO 2023163192 A1 WO2023163192 A1 WO 2023163192A1
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WO
WIPO (PCT)
Prior art keywords
linear
decorative sheet
unit
elements
pattern layer
Prior art date
Application number
PCT/JP2023/007175
Other languages
English (en)
Japanese (ja)
Inventor
晋 宮崎
貴之 嶋田
景吾 大曲
健太郎 秋山
翼 森田
Original Assignee
大日本印刷株式会社
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 大日本印刷株式会社 filed Critical 大日本印刷株式会社
Publication of WO2023163192A1 publication Critical patent/WO2023163192A1/fr

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Classifications

    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
    • 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
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • 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
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • 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
    • 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
    • B32B3/30—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 a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • 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
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements

Definitions

  • the present disclosure relates to a decorative sheet, a decorative member, a display system, a plate manufacturing method, a decorative sheet manufacturing method, and a decorative member manufacturing method.
  • a linear pattern is used for surface decoration.
  • the linear pattern may be, for example, a hairline pattern in which linear elements extend linearly in a given direction.
  • the linear pattern may be a spin pattern in which linear elements extend in a curved shape in the circumferential direction.
  • a linear pattern can be made by scribing the surface of the metal in a predetermined direction.
  • the linear pattern may be a wood grain pattern that expresses wood grain.
  • the linear pattern may be a woven pattern representing a woven fabric.
  • the linear pattern may be a cloth pattern obtained by weaving plant fibers, as an example of a textile pattern.
  • the linear pattern may be a carbon pattern obtained by weaving carbon fibers, as an example of a woven pattern.
  • the linear pattern may be a denim pattern representing denim, as an example of a textile pattern.
  • a decorative sheet using resin expresses a linear pattern.
  • This decorative sheet includes linear elements as linear protrusions or linear recesses.
  • the linear elements are arranged in a direction perpendicular to their longitudinal direction.
  • Linear elements can be made by resin molding such as embossing.
  • the decorative sheet can be placed over a display device, light source device, or the like that forms an image.
  • a decorative sheet constitutes a display system together with a display device, a light source device, and the like. In the display system, the decorative sheet allows transmission of light from the display device and the light source device to enable transmission observation of the image.
  • the decorative sheet can hide the display device and the light source device when no image is displayed.
  • Patent Document 1 JP2010-52353A
  • Patent Document 2 JP2008-89479A
  • the present disclosure aims at suppressing blurring of image contours in a display system.
  • An embodiment of the present disclosure relates to the following ⁇ 1> to ⁇ 54>.
  • the linear pattern layer includes a plurality of linear elements, Each linear element includes unit elements arranged two-dimensionally, A decorative sheet having a total light transmittance of 5% or more and 90% or less.
  • the linear pattern layer includes a plurality of linear elements,
  • the linear element includes a side wall non-parallel to the longitudinal direction at an intermediate portion in the longitudinal direction,
  • a decorative sheet having a total light transmittance of 5% or more and 90% or less.
  • the linear pattern layer includes a plurality of linear elements arranged in one direction, Each linear element includes unit elements arranged two-dimensionally, The decorative sheet, wherein the unit elements are unit protrusions or unit recesses.
  • ⁇ 4> The decorative sheet according to any one of ⁇ 1> to ⁇ 3>, wherein the linear pattern layer displays a hairline pattern, a spin pattern, a wood grain pattern, or a woven pattern.
  • Each linear element includes unit elements arranged two-dimensionally, The decorative sheet according to any one of ⁇ 1> to ⁇ 4>, wherein the unit element has a maximum length of 1 ⁇ m or more and 50 ⁇ m or less.
  • Each linear element includes unit elements arranged two-dimensionally, The decorative sheet according to any one of ⁇ 1> to ⁇ 5>, wherein the uneven structure formed by the unit elements has a height difference of 0.3 ⁇ m or more and 20 ⁇ m or less.
  • Each linear element includes unit elements arranged two-dimensionally,
  • the unit element is a unit convex portion or a unit concave portion,
  • the decorative sheet according to any one of ⁇ 1> to ⁇ 7>, wherein the arrangement ratio of the unit recesses differs between two linear elements adjacent to each other in the arrangement direction of the linear elements.
  • Each linear element includes unit elements arranged two-dimensionally, The decorative sheet according to any one of ⁇ 1> to ⁇ 12>, wherein each unit element is a unit convex portion or a unit concave portion.
  • the unit elements are arranged in a first arrangement direction and a second arrangement direction non-parallel to the first arrangement direction;
  • the unit elements adjacent to the unit recesses in the first arrangement direction are the unit protrusions, and are adjacent to the unit recesses in the second arrangement direction.
  • the matching unit element is the unit protrusion.
  • the unit element adjacent to the unit convex portion in the first arrangement direction is the unit concave portion, and the unit convex portion and the unit convex portion are arranged in the second arrangement direction.
  • Each linear element includes unit elements arranged two-dimensionally, The unit elements are arranged in an array direction, The decorative sheet according to any one of ⁇ 1> to ⁇ 15>, wherein the wall portion inclination angle specified in the cross section along the arrangement direction is 66° or more.
  • the length of the linear element along the longitudinal direction is 20 ⁇ m or more and 2 m or less
  • a light-shielding pattern sheet superimposed on the linear pattern layer The decorative sheet according to any one of ⁇ 1> to ⁇ 17>, wherein the light-shielding pattern sheet includes a light-shielding region having a property of blocking visible light and a transmitting region having a property of transmitting visible light.
  • ⁇ 20> The decorative sheet according to any one of ⁇ 1> to ⁇ 19>, wherein the linear pattern layer contains one or more of a light stabilizer and an ultraviolet absorber.
  • a decorative member comprising: a thermoplastic resin portion joined to the decorative sheet.
  • the linear pattern layer includes a plurality of linear elements, Each linear element includes unit elements arranged two-dimensionally,
  • the thermoplastic resin portion contains a thermoplastic resin, A decorative member having a total light transmittance of 5% or more and 90% or less.
  • the linear pattern layer includes a plurality of linear elements, the linear element includes a side wall non-parallel to the longitudinal direction at an intermediate portion in the longitudinal direction;
  • the thermoplastic resin portion contains a thermoplastic resin, A decorative member having a total light transmittance of 5% or more and 90% or less.
  • the linear pattern layer includes a plurality of linear elements arranged in one direction, Each linear element includes unit elements arranged two-dimensionally, The decorative member, wherein the unit elements are unit protrusions or unit recesses.
  • a display system comprising: a display device or a light source device superimposed on the decorative sheet or the decorative member.
  • ⁇ 27> The plate manufacturing method according to ⁇ 26>, comprising the step of blasting the metal surface on which the recesses are formed.
  • a method for producing a decorative sheet comprising a step of producing a resin imprint layer using a plate produced by the production method described in ⁇ 26> or ⁇ 27>.
  • ⁇ 29> A step of producing a linear pattern layer by using the resin-shaped layer peeled off from the plate as a second plate, supplying a resin composition to the resin-shaped layer, and curing the resin composition.
  • the method for producing a decorative sheet according to ⁇ 28> comprising:
  • ⁇ 32> The method for producing a decorative sheet according to any one of ⁇ 28> to ⁇ 31>, comprising the step of forming a design layer overlaid on the linear pattern layer.
  • a method of manufacturing a decorative member comprising: supplying a heated thermoplastic resin into the cavity in which the decorative sheet is arranged to produce a thermoplastic resin portion joined to the decorative sheet.
  • the linear pattern layer includes a plurality of linear elements, The plurality of linear elements are arranged in one direction, Each linear element extends in the other direction intersecting the one direction,
  • the ten-point average roughness Rz defined in JISB0601-1994 and along the one direction is 3.2 ⁇ m or less,
  • the linear pattern layer includes linear protrusions and linear recesses alternately arranged in the one direction,
  • a side wall inclination angle specified in a cross section across the linear protrusions and linear recesses adjacent to each other in one direction is 66° or more
  • the cross section is a cross section along both the normal direction of the decorative sheet and the one direction
  • the side wall inclination angle is an angle between a straight line passing through a first position and a second position on the linear pattern layer and the normal direction in the cross section
  • the first position is the line lower than the highest position by 10% of the height difference between the highest position of the linear protrusion crossed by the cross section and the lowest position of the linear recess adjacent to the linear protrusion.
  • a decorative sheet comprising a linear pattern layer, The total light transmittance is 5% or more and 90% or less
  • the linear pattern layer includes a plurality of linear elements, The plurality of linear elements are arranged in one direction, Each linear element extends in the other direction intersecting the one direction,
  • the plurality of linear elements include linear protrusions and linear recesses alternately arranged in one direction,
  • a side wall inclination angle specified in a cross section that crosses the linear protrusions and linear recesses that are adjacent to each other in one direction is 66° or more
  • the cross section is a cross section along both the normal direction of the decorative sheet and the one direction,
  • the side wall inclination angle is an angle between a straight line passing through a first position and a second position on the linear pattern layer and the normal direction in the cross section,
  • the first position is the line lower than the highest position by 10% of the height difference between the highest position of the linear protrusion crossed by the cross section and the lowest position of the linear recess adjacent to the linear pro
  • ⁇ 39> The decorative sheet according to any one of ⁇ 34> to ⁇ 38>, wherein the linear pattern layer displays a hairline pattern, a spin pattern, a wood grain pattern, or a woven pattern.
  • the length of the linear element along the other direction is 20 ⁇ m or more and 2 m or less
  • ⁇ 41> A light-shielding pattern sheet superimposed on the linear pattern layer, The decorative sheet according to any one of ⁇ 34> to ⁇ 40>, wherein the light-shielding pattern sheet includes a light-shielding region having a property of blocking visible light and a transmitting region having a property of transmitting visible light.
  • ⁇ 42> The decorative sheet according to any one of ⁇ 34> to ⁇ 41>, wherein the linear pattern layer comprises a cured product of an electron beam curable resin composition.
  • ⁇ 43> The decorative sheet according to any one of ⁇ 34> to ⁇ 42>, wherein the linear pattern layer contains one or more of a light stabilizer and an ultraviolet absorber.
  • a decorative member comprising: a thermoplastic resin portion joined to the decorative sheet.
  • the linear pattern layer includes a plurality of linear elements, The plurality of linear elements are arranged in one direction, Each linear element extends in the other direction intersecting the one direction,
  • the ten-point average roughness Rz defined in JISB0601-1994 and along the one direction is 3.2 ⁇ m or less,
  • the linear pattern layer includes a plurality of linear elements, The plurality of linear elements are arranged in one direction, Each linear element extends in the other direction intersecting the one direction,
  • the plurality of linear elements include linear protrusions and linear recesses alternately arranged in one direction,
  • a side wall inclination angle specified in a cross section that crosses the linear protrusions and linear recesses that are adjacent to each other in one direction is 66° or more
  • the cross section is a cross section along both the normal direction of the linear pattern layer and the one direction
  • the side wall inclination angle is an angle between a straight line passing through a first position and a second position on the linear pattern layer and the normal direction in the cross section,
  • the first position is the line lower than the highest position by 10% of the height difference between the highest position of the linear protrusion crossed by the cross section and the lowest position of the linear recess
  • a display system comprising: a display device or a light source device superimposed on the decorative sheet or the decorative member.
  • a method for producing a decorative sheet comprising a step of producing a resin transfer layer using a plate produced by the production method described in ⁇ 48>.
  • ⁇ 50> A step of producing a linear pattern layer by using the resin embossing layer peeled off from the plate as a second plate, supplying a resin composition to the resin embossing layer, and curing the resin composition.
  • ⁇ 51> a step of supplying a first resin composition to the surface of the resin transfer layer peeled off from the plate that was in contact with the plate, and producing a coating layer from the first resin composition; a step of supplying a second resin composition onto the coating layer and curing the second resin composition to produce a linear pattern layer;
  • ⁇ 53> The method for producing a decorative sheet according to any one of ⁇ 49> to ⁇ 52>, further comprising the step of forming a design layer overlaid on the linear pattern layer.
  • a method of manufacturing a decorative member comprising: supplying a heated thermoplastic resin into the cavity in which the decorative sheet is arranged to produce a thermoplastic resin portion joined to the decorative sheet.
  • FIG. 1 is a diagram for explaining first and second embodiments, and is a perspective view schematically showing an example of a display system, a decorative member, and a decorative sheet.
  • FIG. 2 is a diagram for explaining the first embodiment, and is a sectional view showing the display system, the decorative member, and the decorative sheet shown in FIG. 3 is a front plan view of the display system shown in FIG. 1, shown in a non-operating state;
  • FIG. 4 is a front plan view of the display system shown in FIG. 1, showing an operational state.
  • FIG. 5A is a plan view showing another example of the display system, and is a diagram showing another example of the linear pattern displayed by the display system.
  • FIG. 1 is a diagram for explaining first and second embodiments, and is a perspective view schematically showing an example of a display system, a decorative member, and a decorative sheet.
  • FIG. 2 is a diagram for explaining the first embodiment, and is a sectional view showing the display system, the decorative member, and the decorative sheet shown in FIG.
  • FIG. 5B is a plan view showing still another example of the display system, and is a diagram showing still another example of the linear pattern displayed by the display system.
  • FIG. 5C is a plan view showing still another example of the display system, and is a diagram showing still another example of the linear pattern displayed by the display system.
  • FIG. 5D is a plan view showing still another example of the display system, and is a diagram showing still another example of the linear pattern displayed by the display system.
  • 6 is an enlarged plan view schematically showing a linear pattern layer that can be included in the decorative sheet shown in FIG. 1.
  • FIG. 7A is a partial perspective view showing an enlarged example of the linear pattern layer shown in FIG. 6.
  • FIG. 7B is an enlarged partial perspective view showing another example of the linear pattern layer shown in FIG. 6.
  • FIG. 8 is a cross-sectional view showing still another example of the linear pattern layer shown in FIG. 6, taken along both the first direction and the normal direction.
  • FIG. 8 is also a cross-sectional view showing still another example of the linear pattern layer shown in FIG. 6, along both the second direction and the normal direction.
  • 9 is a perspective view showing a plate that can be used to manufacture the decorative sheet shown in FIG. 1.
  • FIG. FIG. 10 is an example of image data of a linear pattern.
  • FIG. 11 is a diagram for explaining a method of manufacturing a plate.
  • FIG. 12 is a cross-sectional view of the plate taken along the line AA in FIG. 10, which is a diagram for explaining the method of manufacturing the resin imprinted layer using the plate.
  • FIG. 13 is a diagram showing an example of a method for manufacturing a decorative sheet, and is a diagram for explaining a method for producing a decorative sheet laminate containing a decorative sheet using a resin-imparting layer.
  • FIG. 14 is a diagram showing an example of a method for manufacturing a decorative sheet, and is a diagram for explaining a method for producing a decorative sheet laminate containing a decorative sheet using a resin-imparting layer.
  • FIG. 15 is a diagram showing an example of a method for manufacturing a decorative sheet, and is a diagram for explaining a method for producing a decorative sheet laminate including a decorative sheet using a resin molding layer.
  • FIG. 16 is a diagram showing an example of a method for manufacturing a decorative sheet, and is a diagram for explaining a method for producing a decorative sheet laminate containing a decorative sheet using a resin-imparting layer.
  • FIG. 17 is a diagram showing an example of a method of manufacturing a decorative member, and is a diagram illustrating a method of manufacturing a thermoplastic resin portion joined to a decorative sheet by injection molding.
  • FIG. 18 is a diagram showing an example of a method of manufacturing a decorative member, and is a diagram illustrating a method of manufacturing a thermoplastic resin portion joined to a decorative sheet by injection molding.
  • FIG. 19 is a diagram showing an example of a method of manufacturing a decorative member, and is a diagram explaining a method of manufacturing a thermoplastic resin portion joined to a decorative sheet by injection molding.
  • FIG. 20 is a diagram showing an example of a method of manufacturing a decorative member, and explaining a method of manufacturing a thermoplastic resin portion joined to a decorative sheet by injection molding.
  • FIG. 21 is a diagram showing an example of a method for manufacturing a decorative member. 22 is a cross-sectional view showing an example of a linear pattern layer that can be included in the decorative sheet shown in FIG. 1.
  • FIG. 23 is a cross-sectional view showing another example of a linear pattern layer that can be included in the decorative sheet shown in FIG. 1.
  • FIG. 24 is a cross-sectional view corresponding to FIG. 2, showing a modified example of the display system, the decorative member, and the decorative sheet.
  • FIG. 25 is a cross-sectional view corresponding to FIG. 2 and showing another modification of the display system and the decorative sheet.
  • FIG. 26 is a sectional view corresponding to FIG. 2 and showing still another modification of the display system and the decorative sheet.
  • FIG. 27 is a cross-sectional view corresponding to FIG. 1, showing still another modification of the display system and the decorative member.
  • FIG. 28 is a graph showing the relationship between the arrangement ratio of the unit recesses and the ten-point average roughness Rz along the longitudinal direction of the linear element.
  • 29A is a diagram corresponding to FIG. 17 and showing another example of the method for manufacturing the decorative member.
  • FIG. 17 is a diagram corresponding to FIG. 17 and showing another example of the method for manufacturing the decorative member.
  • FIG. 29B is a diagram corresponding to FIG. 18 and showing another example of the manufacturing method of the decorative member.
  • FIG. 29C is a diagram corresponding to FIG. 19 and showing another example of the method for manufacturing the decorative member.
  • FIG. 29D is a diagram corresponding to FIG. 20 and showing another example of the method for manufacturing the decorative member.
  • FIG. 30 is a diagram for explaining the second embodiment, and is a cross-sectional view showing the display system, the decorative member, and the decorative sheet shown in FIG. 31A is a cross-sectional view showing an example of a linear pattern layer that can be included in the decorative sheet shown in FIG. 1.
  • FIG. 31B is a cross-sectional view showing another example of a linear pattern layer that can be included in the decorative sheet shown in FIG. 1.
  • FIG. 32 is a cross-sectional view of the plate taken along the line AA in FIG. 9, which is a diagram for explaining the method of manufacturing the resin transfer layer using the plate.
  • FIG. 33 is a diagram showing an example of a method for producing a decorative sheet, and explaining a method for producing a decorative sheet laminate containing a decorative sheet using a resin molding layer.
  • FIG. 34 is a diagram showing an example of a method for manufacturing a decorative sheet, and is a diagram for explaining a method for producing a decorative sheet laminate containing a decorative sheet using a resin-imparting layer.
  • FIG. 35 is a diagram showing an example of a method for producing a decorative sheet, and explaining a method for producing a decorative sheet laminate including a decorative sheet using a resin-imparting layer.
  • FIG. 36 is a diagram showing an example of a method for manufacturing a decorative sheet, and is a diagram for explaining a method for producing a decorative sheet laminate containing a decorative sheet using a resin-imparting layer.
  • FIG. 37 is a diagram showing an example of a method of manufacturing a decorative member, and is a diagram illustrating a method of manufacturing a thermoplastic resin portion joined to a decorative sheet by injection molding.
  • FIG. 38 is a diagram showing an example of a method of manufacturing a decorative member, and is a diagram explaining a method of manufacturing a thermoplastic resin portion joined to a decorative sheet by injection molding.
  • FIG. 37 is a diagram showing an example of a method of manufacturing a decorative member, and is a diagram explaining a method of manufacturing a thermoplastic resin portion joined to a decorative sheet by injection molding.
  • FIG. 39 is a diagram showing an example of a method of manufacturing a decorative member, and is a diagram explaining a method of manufacturing a thermoplastic resin portion joined to a decorative sheet by injection molding.
  • FIG. 40 is a diagram showing an example of a method of manufacturing a decorative member, and is a diagram illustrating a method of manufacturing a thermoplastic resin portion joined to a decorative sheet by injection molding.
  • FIG. 41 is a diagram showing an example of a method for manufacturing a decorative member.
  • FIG. 42 is a cross-sectional view corresponding to FIG. 30, showing a modified example of the display system, the decorative member, and the decorative sheet.
  • FIG. 43 is a cross-sectional view corresponding to FIG. 30 and showing another modification of the display system and the decorative sheet.
  • FIG. 44 is a cross-sectional view corresponding to FIG. 30 and showing still another modification of the display system and the decorative sheet.
  • FIG. 45 is a plan view showing a problem that has occurred in a conventional decorative sheet.
  • Sheet surface (film surface, plate surface) refers to the target sheet-like member (film-like, plate-like) when viewed as a whole and broadly. means the surface coinciding with the plane of the member).
  • the normal direction to a sheet-like (film-like, plate-like) member is a direction parallel to the normal or perpendicular to the sheet surface (film surface, plate surface) of the sheet-like (film-like, plate-like) member.
  • FIG. 2 An arrow pointing forward from the plane of the drawing along a direction perpendicular to the plane of the drawing is indicated by a dot in a circle, as shown in FIG. 2, for example.
  • An arrow directed to the depth of the paper along the direction perpendicular to the paper of the drawing is indicated, for example, by a circle with an x in it, as shown in FIG.
  • the numerical range of the parameter is any one upper limit candidate and any one lower limit value.
  • Parameter B may be A1 or greater, A2 or greater, or A3 or greater.
  • Parameter B may be A4 or less, A5 or less, or A6 or less.
  • the numerical range of the parameter B may be A1 or more and A4 or less, A1 or more and A5 or less, A1 or more and A6 or less, A2 or more and A4 or less, A2 or more and A5 or less, or A2 or more and A6 or less.
  • A3 or more and A4 or less may be sufficient, A3 or more and A5 or less may be sufficient, A3 or more and A6 or less may be sufficient.
  • FIG. 1 is a perspective view schematically showing one specific example of the display system 10.
  • the display system 10 includes a light source device 12 or a display device 16 and a decorative member 20 or a decorative sheet 30 overlaid on the light source device 12 or the display device 16 .
  • the decorative member 20 includes a decorative sheet 30 and a thermoplastic resin portion 64 joined to the decorative sheet 30, as will be described later.
  • the light source device 12 or display device 16 can be in an operating state and a non-operating state.
  • Light source device 12 or display device 16 emits light in an operational state.
  • Light from the light source device 12 or the display device 16 passes through the decorative member 20 or the decorative sheet 30 .
  • the display system 10 is capable of displaying images.
  • Light source device 12 or display device 16 ceases to emit light in a non-operating state.
  • the decorative member 20 or the decorative sheet 30 may hide the light source device 12 or the display device 16 from the third direction.
  • the decorative member 20 or the decorative sheet 30 displays the design in the non-operating state.
  • the decorative member 20 or the decorative sheet 30 displays a linear pattern 35 as a design.
  • measures are taken to prevent the outline of the displayed image from blurring. According to the first and second embodiments, the contour of the image can be clearly displayed.
  • the display system 10 shown in FIG. 1 includes a decorative member 20 and a light source device 12.
  • a first embodiment and a second embodiment will be described in order below with reference to a specific example in which the display system 10 is configured by the light source device 12 and the decorative member 20 .
  • Some figures such as FIGS. 1 to 5D are common to both the first embodiment and the second embodiment.
  • the decorative member 20 and the light source device 12 are stacked in the third direction D3.
  • the light source device 12 is at least partially covered with the decorative member 20 and the decorative sheet 30 from the third direction D3. According to the display system 10 , the light source device 12 can be installed while ensuring harmony with the surroundings by the decorative sheet 30 .
  • the decorative member 20 includes a plurality of constituent elements stacked in the third direction D3. Therefore, the third direction D3 is the stacking direction.
  • the decorating member 20 and components described later that constitute the decorating member 20 spread in the first direction D1 and the second direction D2.
  • the first direction D1 and the second direction D2 are orthogonal.
  • the third direction D3 is orthogonal to the first direction D1 and also orthogonal to the second direction D2.
  • the third direction D3 is parallel to the normal direction of the decorative member 20 and the decorative sheet 30 .
  • the third direction D3 is parallel to the normal direction of the below-described constituent elements that constitute the decorative member 20 .
  • the display system 10 can be applied to various uses.
  • the display system 10 may be applied to interiors and exteriors of moving bodies.
  • a mobile is a device that can move. Examples of mobile objects include automobiles, railroad vehicles, ships, and airplanes.
  • display system 10 may be applied to the interior of an automobile.
  • the display system 10 may be applied to walls, doors, ceilings, etc. as the interior of a building.
  • the display system 10 may be applied to various devices such as furniture and home appliances.
  • the light source device 12 lights up in the operating state. In the lighting state, the light source device 12 emits light.
  • the light source device 12 may be a light emitter itself such as a light emitting diode or cold cathode tube light, or may be a surface light source device in which a light emitter and an optical member are combined.
  • the wavelength range of light emitted from the light source device 12, the amount of light, the size of the light emitting surface, the light distribution characteristics, and the like can be appropriately selected according to the application of the display system 10 and the like.
  • the light source device 12 includes a surface light source device, also called a backlight.
  • the light source device 12 has a rectangular light emitting surface 12a in plan view.
  • the surface light source device may be of various types such as an edge light type or a direct type. All or part of the light emitting surface 12a may be covered with the decorative sheet 30 from the third direction D3. All or part of the light source device 12 may be covered with the decorative sheet 30 from the third direction D3.
  • the display system 10 including the light source device 12 may include the light shielding pattern sheet 66.
  • the light-shielding pattern sheet 66 includes light-shielding regions 66a and transmissive regions 66b.
  • the light shielding region 66a has a visible light shielding property.
  • the transmissive region 66b has visible light transmissivity. Light emitted from the light source device 12 is blocked by the light shielding region 66a and transmitted through the transmission region 66b.
  • an image of the same pattern as that of the transmissive area 66b can be displayed. For example, characters, patterns, symbols, marks, illustrations, characters, pictograms, etc. may be displayed as images.
  • the display system 10 displays cross, triangle and square marks.
  • the light shielding area 66a may reflect or absorb visible light.
  • the light shielding region 66a may be, for example, a resin layer containing a black pigment such as carbon black.
  • the transmissive region 66b may be an opening provided in a resin layer containing a black pigment, or may be a transparent resin portion filled in the opening. Visible light is light having a wavelength of 380 nm or more and 780 nm or less.
  • Visible light transmittance means that the total light transmittance is 2% or more, preferably 5% or more.
  • Vehicle light blocking property means that the total light transmittance is 1% or less, preferably 0.1% or less, and more preferably 0.01% or less.
  • the total luminous transmittance is the ratio (%) of the transmitted luminous flux that has passed through the measuring object to the parallel incident luminous flux.
  • the transmitted light flux includes diffusely transmitted light.
  • the total light transmittance is a value measured according to JIS K 7361 using a D65 light source. Total light transmittance is measured at an incident angle of 0°.
  • Transparent means that the total light transmittance is 2% or more, preferably 5% or more.
  • the light shielding pattern sheet 66 may be included in the decorative member 20. As shown in FIG. 24 , the light shielding pattern sheet 66 may be included in the decorative sheet 30 .
  • the display system 10 may include a display device 16 instead of the light source device 12.
  • the display device 16 displays an image in an operating state. In the display state, the display device 16 emits image light.
  • Display device 16 may include various devices capable of displaying images.
  • Display device 16 may include a display surface 16a on which an image is formed. All or part of the display surface 16a may be covered with the decorative sheet 30 from the third direction D3. All or part of the display device 16 may be covered with the decorative sheet 30 from the third direction D3.
  • the display device 16 may include the light source device 12 and the light shielding pattern sheet 66.
  • This display device 16 can display characters, numbers, patterns, colored patterns, symbols, marks, illustrations, characters, pictograms, etc. as images.
  • the display device 16 may be a dot matrix display device.
  • a dot-matrix display device has a plurality of pixels forming each dot. This display device can display a desired image by controlling the light emission state of each pixel. This display device may display either still images or moving images. Examples of the display device 16 include a liquid crystal display device and an electroluminescence display device also called an EL display device.
  • the display device 16 includes a transmissive display panel 17 and a surface light source device 12 that planarly illuminates the display panel 17 from behind.
  • a liquid crystal display panel is exemplified as the transmissive display panel 17 .
  • the surface light source device 12 may be various devices such as an edge light type and a direct type.
  • the decorative member 20 includes a decorative sheet 30 and a thermoplastic resin portion 64 joined to the decorative sheet 30 .
  • the decorative member 20 may contain further components.
  • the decorative member 20 shown in FIG. 2 further includes a light shielding pattern sheet 66.
  • the thermoplastic resin portion 64 is positioned between the decorative sheet 30 and the light shielding pattern sheet 66 in the third direction D3.
  • the light-shielding pattern sheet 66 includes the light-shielding region 66a and the transmissive region 66b, as described above.
  • a separately prepared light shielding pattern sheet 66 may be bonded to the thermoplastic resin portion 64 by a bonding layer containing an adhesive or adhesive material.
  • the light-shielding pattern sheet 66 may be formed on the thermoplastic resin portion 64 by applying and drying a resin composition on the thermoplastic resin portion 64 .
  • thermoplastic resin portion 64 is positioned between the decorative sheet 30 and the light source device 12 or the display device 16 in the third direction D3.
  • the decorative sheet 30 may be positioned between the thermoplastic resin portion 64 and the light source device 12 or the display device 16 in the third direction D3.
  • Light from the light source device 12 and the display device 16 can pass through the thermoplastic resin portion 64 .
  • the thermoplastic resin portion 64 may be transparent.
  • the thermoplastic resin portion 64 may be made by injection molding, as described later. By reinforcing the decorative sheet 30 with the thermoplastic resin portion 64, the application range of the decorative sheet 30 is expanded.
  • the thermoplastic resin contained in the thermoplastic resin portion 64 include polycarbonate, acrylic resin such as polymethyl methacrylate, and ABS (acrylonitrile-butadiene-styrene copolymer).
  • the thickness of the thermoplastic resin portion 64 in the third direction D3 is appropriately selected according to the application of the decorative member 20 and the like.
  • the thickness of the thermoplastic resin portion 64 in the third direction D3 may be 100 ⁇ m or more, 200 ⁇ m or more, or 500 ⁇ m or more.
  • the thickness of the thermoplastic resin portion 64 in the third direction D3 may be 5000 ⁇ m or less, 4000 ⁇ m or less, or 3000 ⁇ m or less.
  • the decorative sheet 30 displays the design.
  • the decorative sheet 30 allows transmission of light from the light source device 12 and the display device 16 in a state of being superimposed on the light source device 12 and the display device 16, thereby enabling transmission observation of an image.
  • the total light transmittance of the decorative sheet 30 may be 5% or more, 10% or more, 15% or more, or 20% or more.
  • the decorative sheet 30 displays the design.
  • the decorative sheet 30 imparts design to the display system 10 .
  • the decorative sheet 30 imparts designability to the decorative member 20 or members and places to which the decorative sheet 30 is applied.
  • the total light transmittance of the decorative sheet 30 may be 90% or less, 80% or less, 70% or less, 60% or less, or 50%. It may be less than or equal to 45% or less, or 40% or less.
  • the decorative sheet 30 enables rich design expression. By setting the upper limit of the total light transmittance of the decorative sheet 30, a metallic texture can be expressed.
  • the total light transmittance is a value measured using a D65 light source in accordance with JIS K 7361. Total light transmittance is measured at an incident angle of 0°.
  • the total light transmittance is the total light transmittance measured in the transmission region 66b.
  • the thickness of the decorative sheet 30 in the third direction D3 is appropriately selected according to the use of the decorative member 20 and the like.
  • the thickness of the decorative sheet 30 in the third direction D3 may be 3 ⁇ m or more, or may be 4 ⁇ m or more.
  • the thickness of the decorative sheet 30 in the third direction D3 may be 500 ⁇ m or less, 300 ⁇ m or less, or 50 ⁇ m or less.
  • the decorative sheet 30 includes a linear pattern layer 40. As shown in FIG. 2, the decorative sheet 30 includes a linear pattern layer 40. As shown in FIG. The decorative sheet 30 may contain components other than the linear pattern layer 40 .
  • the decorative sheet 30 shown in FIG. 2 includes a linear pattern layer 40 as well as a joining layer 62 and a design layer 60 . In the example shown in FIG. 2, the linear pattern layer 40, the bonding layer 62 and the design layer 60 are arranged in this order.
  • the design layer 60 and the bonding layer 62 are positioned between the linear pattern layer 40 and the thermoplastic resin portion 64 in the third direction D3.
  • the linear pattern layer 40 may form the surfaces of the decorative sheet 30 and the decorative member 20 .
  • the linear pattern layer 40 displays the linear pattern 35.
  • the linear pattern 35 is a linear pattern.
  • Linear pattern layer 40 includes a plurality of linear elements 45 .
  • a plurality of linear elements 45 are arranged in one direction. One direction is the arrangement direction of the linear elements 45 .
  • Each linear element 45 extends in the other direction crossing the one direction.
  • Each linear element 45 may extend in the other direction perpendicular to the one direction.
  • Each linear element 45 has a longitudinal direction, the other direction being the longitudinal direction.
  • Each linear element 45 elongates in the other longitudinal direction.
  • the plurality of linear elements 45 may extend generally parallel.
  • a linear pattern 35 is represented by a set of a plurality of linear elements 45 .
  • a hairline pattern and a spin pattern are exemplified as the linear pattern 35 . 3 and 4 show an example of a hairline pattern.
  • the linear elements 45 linearly extend in the longitudinal direction (the other direction) orthogonal to the arrangement direction (the one direction).
  • the linear elements 45 are arranged in the second direction D2, which is the arrangement direction (one direction).
  • Each linear element 45 extends linearly in a first direction D1 as the longitudinal direction (the other direction).
  • FIG. 5A shows an example of a spin pattern.
  • the arrangement direction (one direction) of the plurality of linear elements 45 is the radial direction or the radial direction centering on one middle position.
  • the longitudinal direction (the other direction) of the linear element 45 is the circumferential direction centered on one intermediate position.
  • Each linear element 45 extends in a curved line.
  • the linear elements 45 extend curvilinearly along concentric arcs centered at one intermediate position.
  • the linear pattern layer 40 may include multiple spin patterns.
  • the center position of one spin pattern may be different from the center position of one spin pattern.
  • the linear element 45 extending in a predetermined direction means that the linear element 45 extends in a predetermined direction (another direction) at any position along its entire length in a strict sense. do not.
  • the angle formed by the extending direction at each position of the linear element 45 with respect to a predetermined direction (other direction) is preferably ⁇ 15° or less, more preferably ⁇ 10° or less, It is more preferable that the angle is ⁇ 5° or less.
  • the angle formed by the direction connecting both ends of the linear elements 45 with respect to the predetermined direction (another direction) is ⁇ 10° or less. ⁇ 5° or less is more preferable, and ⁇ 3° or less is even more preferable.
  • That the linear elements 45 are elongated means that the ratio of the total length to the width of the linear elements 45 is 2 or more, preferably 10 or more, more preferably 20 or more.
  • the total length of the linear element 45 is the length ( ⁇ m) along the longitudinal direction (other direction) of the linear element 45 .
  • the width of the linear elements 45 is the length ( ⁇ m) along the arrangement direction (one direction) of the linear elements 45 .
  • the linear pattern 35 may be a wood grain pattern.
  • the wood grain pattern is a pattern imitating the cross section of wood, and expresses the cross section of the wood.
  • the linear elements 45 may be portions imitating conduit grooves, that is, parts expressing conduit grooves.
  • the linear element 45 may be a portion that imitates the early wood part in the annual ring pattern, that is, a part that expresses the early wood part.
  • the linear element 45 may be a portion that imitates the latewood portion in the annual ring pattern, that is, a portion that expresses the latewood portion.
  • the linear pattern 35 may be a woven pattern.
  • a woven pattern is a pattern imitating a woven fabric, and expresses the woven fabric.
  • a textile is a product obtained by weaving fibers. Fibers are thread-like substances.
  • the linear elements 45 may be portions imitating fibers, that is, portions representing fibers.
  • the textile pattern may be a cloth pattern that expresses a cloth obtained by weaving threads such as vegetable fibers.
  • the linear elements 45 may represent plant fibers by simulating plant fibers.
  • the fabric pattern as the cloth pattern may be a denim pattern representing denim. Denim is a fabric obtained by weaving warp and weft threads. A warp thread passes over a plurality of weft threads, for example two or three weft threads, and under one weft thread. The warp threads are dyed.
  • the linear elements 45 may be portions imitating the warp and weft, that is, portions expressing the warp and weft.
  • the woven pattern may be a carbon pattern obtained by weaving carbon fibers. In the carbon pattern, the linear elements 45 may be carbon fibers.
  • the length of the linear element 45 along the longitudinal direction (other direction) may be 20 ⁇ m or more, 50 ⁇ m or more, or 100 ⁇ m or more.
  • the length of the linear element 45 along the longitudinal direction (the other direction) may be 2 m or less, 1 m or less, 0.5 m or less, or 0.1 m or less.
  • the width along the arrangement direction (one direction) of the linear elements 45 may be 10 ⁇ m or more, 15 ⁇ m or more, or 20 ⁇ m or more.
  • the width along the arrangement direction (one direction) of the linear elements 45 may be 1000 ⁇ m or less, 500 ⁇ m or less, or 300 ⁇ m or less.
  • Each linear element 45 may be a linear protrusion 45A or a linear recess 45B. As shown in FIG. 2, even if the average height in the third direction D3 differs between two linear elements 45 adjacent in the second direction D2, which is the arrangement direction (one direction) of the linear elements 45, good. Thereby, two linear elements 45 adjacent to each other in the arrangement direction (the second direction D2 in the illustrated example) may be identified.
  • Each linear element 45 may include multiple unit elements 48 .
  • the unit elements 48 may be unit convex portions 48A or unit concave portions 48B.
  • the unit convex portion 48A and the unit concave portion 48B are distinguished by their position (height) in the normal direction of the decorative sheet 30 (the third direction D3 in the illustrated example).
  • a reference position (reference height) in the normal direction of the decorative sheet 30 is set, and the unit convex portions 48A and the unit concave portions 48B are distinguished based on the reference position.
  • a unit element 48 protruding closer to the observer than the reference position in the normal direction is the unit convex portion 48A.
  • the unit element 48 that is recessed away from the viewer from the reference position becomes the unit recess 48B.
  • the reference position is the average position (average height) of the linear pattern layer 40 in the normal direction of the decorative sheet 30 .
  • linear protrusions 45A or linear recesses 45B By relative comparison of the average position (average height) of the linear elements 45 in the normal direction of the decorative sheet 30 (the third direction D3 in the illustrated example), two linear elements 45 adjacent in the arrangement direction are , linear protrusions 45A or linear recesses 45B.
  • a reference position (reference height) in the normal direction of the decorative sheet 30 is set, and the linear protrusions 45A and the linear recesses 45B are distinguished based on the reference height.
  • Linear elements 45 whose average position (average height) is closer to the observer than the reference position in the normal direction of the decorative sheet 30 are linear projections 45A.
  • Linear elements 45 whose average position (average height) is lower than the reference position in the normal direction of the decorative sheet 30 and which are farther from the observer are linear concave portions 45B.
  • the reference position is the average position (average height) of the linear pattern layer 40 in the normal direction of the decorative sheet 30 .
  • the average position (average height) of the linear pattern layer 40 in the normal direction of the decorative sheet 30 is specified using a scanning white interferometer (model number New View 6300) manufactured by Zygo Corporation. According to the scanning white light interferometer, the average position in the normal direction of the decorative sheet 30 can be measured for the measurement target area.
  • the average position of the measurement target area is measured at 20 measurement positions. From the 20 measurements obtained, 10 measurements, excluding the 1st to 5th largest measurements and the 5 smallest measurements 1st to 5th smallest to select. The average value of the ten selected measurement values is taken as the average position of the linear pattern layer 40 in the normal direction of the decorative sheet 30 .
  • the measurement target area is a 216 ⁇ m square (216 ⁇ m ⁇ 216 ⁇ m) area.
  • FIG. 6 is a plan view showing linear protrusions 45A and linear recesses 45B adjacent to each other in the arrangement direction (the second direction D2 in the illustrated example).
  • FIG. 6 shows only a portion of the two linear elements 45 in the longitudinal direction (the first direction D1 in the illustrated example).
  • the height in the third direction D3 is indicated by color.
  • the white portion indicates the unit convex portion 48A
  • the black portion indicates the unit concave portion 48B.
  • a linear region 46 in which one linear element 45 is arranged is divided into a large number of unit regions 49 .
  • a large number of unit areas 49 are set by dividing each linear area 46 .
  • Unit regions 49 are arranged two-dimensionally in each linear region 46 .
  • a two-dimensional array means arrayed in each of two non-parallel directions.
  • the unit regions 49 are arranged in a first direction D1 and a second direction D2 that are orthogonal to each other.
  • One unit element 48 is assigned to each unit area 49 . Therefore, in each linear element 45, unit elements 48 are arranged two-dimensionally. In the illustrated example, the unit elements 48 are arranged in both the first direction D1 and the second direction D2.
  • the unit elements 48 and the unit regions 49 may be arranged in a direction non-parallel to the longitudinal direction D1 of the linear element 45 .
  • the unit elements 48 and the unit regions 49 may be arranged in a direction non-parallel to the arrangement direction D2 of the linear elements 45 .
  • the arrangement ratio of the unit convex portions 48A may differ between two linear elements 45 adjacent to each other in the arrangement direction (the second direction D2 in the illustrated example). Thereby, the average height of two adjacent linear elements 45 in the third direction D3 is different, and the two adjacent linear elements 45 can be distinguished from each other.
  • the arrangement ratio means the ratio (%) of the area where the unit convex portions 48A included in the linear element 45 are arranged with respect to the area where one linear element 45 is arranged. Therefore, assuming that the area in which the linear elements 45 are arranged is the linear area 46, between two linear areas 46 adjacent in the arrangement direction (the second direction D2 in the illustrated example), the linear area The arrangement ratio of the unit convex portions 48A within 46 may be different.
  • the arrangement ratio of the unit concave portions 48B may differ between two linear elements 45 adjacent to each other in the arrangement direction (the second direction D2 in the illustrated example). Between two linear regions 46 adjacent to each other in the arrangement direction (the second direction D2 in the illustrated example), the arrangement ratio of the unit concave portions 48B within the linear region 46 may differ. Thereby, the average height of two adjacent linear elements 45 in the third direction D3 is different, and the two adjacent linear elements 45 can be distinguished from each other.
  • At least one of the two linear elements 45 adjacent in the arrangement direction may include the unit convex portion 48A and the other may include the unit concave portion 48B.
  • the average position (average height) in the normal direction of the decorative sheet 30 differs between the two linear elements 45, and the two linear elements 45 may be distinguished from each other.
  • one or both of the two linear elements 45 adjacent in the arrangement direction may include both the unit convex portion 48A and the unit concave portion 48B. Thereby, the average positions (average heights) in the normal direction of the decorative sheet 30 are different between the two linear elements 45 and may be distinguished from each other.
  • the average position (average height) of the linear elements 45 in the normal direction of the decorative sheet 30 is specified using a scanning white interferometer (model number New View 6300) manufactured by Zygo Corporation. According to the scanning white light interferometer, the average position in the normal direction of the decorative sheet 30 can be measured for the measurement target area. At five measurement positions in the target linear element 45, the average position of the measurement target area is measured, and the average value of the three measurement values excluding the maximum measurement value and the minimum measurement value is It is the average position of the elements 45 in the normal direction of the decorative sheet 30 .
  • the measurement target area is a 216 ⁇ m square (216 ⁇ m ⁇ 216 ⁇ m) area. If the measurement target area of 216 ⁇ m square cannot be set because the linear element 45 is thin or the like, a square measurement target area as large as possible centered on the measurement position is set.
  • the linear pattern layer 40 includes a sheet-like base portion 43 and unit convex portions 48A projecting from the base portion 43 in the third direction D3.
  • the base portion 43 is exposed by providing the unit concave portion 48B.
  • the base portion 43 and the unit convex portion 48A may be integrally molded by resin molding. That is, the base portion 43 and the unit convex portion 48A may be seamlessly connected.
  • FIG. 7A is a schematic enlarged view of a portion of the linear region 46 and the linear element 45 shown in FIG.
  • the unit area 49 has a rectangular shape.
  • the unit area 49 may have a square shape.
  • the unit convex portion 48A is a rectangular prism-shaped convex portion.
  • the unit recessed portion 48B is a square prism-shaped recessed portion.
  • the arrangement direction of the unit elements 48 and the unit regions 49 is not particularly limited.
  • the arrangement direction of the unit elements 48 and the unit regions 49 is not limited to the illustrated example, and may be inclined with respect to the longitudinal direction of the linear elements 45 (in the illustrated example, the first direction D1).
  • the arrangement direction of the unit elements 48 and the unit regions 49 may be inclined with respect to the arrangement direction of the linear elements 45 (the second direction D2 in the illustrated example).
  • the unitary elements 48 and unitary regions 49 may not be in the illustrated square array.
  • the unit elements 48 and the unit regions 49 may be arranged in two directions that are inclined with respect to each other.
  • the unitary elements 48 and the unitary regions 49 may be arranged in three directions slanted at 60° with respect to each other. That is, the unit elements 48 and the unit regions 49 may be arranged in a honeycomb pattern.
  • the shape of the unit area 49 in plan view is not particularly limited. From the viewpoint of covering the unit areas 49 without gaps, the shape of the unit areas 49 in plan view may be square or rectangular, as shown in FIG. 7A.
  • the shape of the unit region 49 in plan view may be a polygonal shape such as a triangular shape, a right-angled isosceles triangular shape, an equilateral triangular shape, a hexagonal shape, or a regular hexagonal shape.
  • the shape of the unit area 49 in plan view may be circular or elliptical.
  • the unit element 48 extends over the entire corresponding unit area 49 .
  • two unit convex portions 48A adjacent in the arrangement direction are in contact with each other to form one convex portion.
  • two unit recesses 48B adjacent in the arrangement direction are in contact with each other to form one recess.
  • the unit element 48 may be provided in a partial area of one corresponding unit area 49 .
  • unit elements 48 provided in adjacent unit areas 49 may be spaced apart from each other.
  • the unit elements 48 are quadrangular prism-shaped recesses or protrusions.
  • the shape of the unit element 48 is not particularly limited.
  • the unit element 48 may be a cone-shaped recess or protrusion.
  • the unit convex portion 48A and the unit concave portion 48B may not be convex portions and concave portions having complementary shapes.
  • a plurality of unit convex portions 48A may have different shapes.
  • a plurality of unit recesses 48B may have different shapes.
  • the uneven structure 41 configured by the unit elements 48 does not have to have two levels of height.
  • the concave-convex structure 41 may have three or more steps of height by the unit convex portions 48A and the unit concave portions 48B.
  • the concave-convex structure 41 may have heights that continuously change due to the unit convex portions 48A and the unit concave portions 48B.
  • the linear element 45 has side walls 42 formed by unit convex portions 48A and unit concave portions 48B.
  • the unit convex portions 48A and the unit concave portions 48B are arranged two-dimensionally. Therefore, the side walls 42 are two-dimensionally arranged within one linear element 45 (linear region 46).
  • the sidewalls 42 face in various directions.
  • the linear element 45 includes sidewalls 42A that are non-parallel to the longitudinal direction (the first direction D1 in the illustrated example), for example sidewalls 42A facing the longitudinal direction.
  • the linear element 45 may include side walls 42A facing in the longitudinal direction in the middle part in the longitudinal direction, in other words, in addition to both ends in the longitudinal direction.
  • the longitudinally facing side walls 42A may be distributed at various positions between the longitudinal ends of the linear element 45 .
  • the linear elements 45 may include side walls 42A facing the longitudinal direction in the middle portion in the arrangement direction, in other words, other than both ends in the arrangement direction. Side walls 42A facing the longitudinal direction may be dispersed at various positions between both ends of the linear elements 45 in the arrangement direction.
  • the linear elements 45 include side walls 42B non-parallel to the arrangement direction (second direction D2 in the illustrated example), that is, side walls 42B facing the longitudinal direction.
  • the linear elements 45 may include sidewalls 42B facing the arrangement direction in the middle portion in the arrangement direction, in other words, other than both ends in the arrangement direction.
  • the side walls 42B facing the arrangement direction may be dispersed at various positions between both ends of the linear elements 45 in the arrangement direction.
  • the linear element 45 may include side walls 42B facing the arrangement direction at the intermediate portion in the longitudinal direction, in other words, other than at both ends in the longitudinal direction.
  • the side walls 42A facing the arrangement direction may be dispersed at various positions between both ends of the linear elements 45 in the longitudinal direction.
  • lower limits may be set for the wall portion inclination angles ⁇ 1 and ⁇ 2.
  • a lower limit may be set for the wall portion inclination angles ⁇ 1 and ⁇ 2 (°).
  • the wall portion inclination angles ⁇ 1 and ⁇ 2 are indices representing the magnitude of the inclination angles of the side walls 42A and 42B with respect to the normal direction of the decorative sheet 30.
  • FIG. By setting the lower limits of the wall portion inclination angles ⁇ 1 and ⁇ 2, the side walls 42A and 42B are greatly inclined with respect to the normal direction of the decorative sheet 30 . This weakens the diffusion on the side walls 42A and 42B and suppresses bleeding.
  • the wall portion inclination angles ⁇ 1 and ⁇ 2 may be 66° or more, 73° or more, or 76° or more.
  • upper limits may be set for the wall inclination angles ⁇ 1 and ⁇ 2.
  • the wall portion inclination angles ⁇ 1 and ⁇ 2 may be 87° or less.
  • the wall inclination angles ⁇ 1 and ⁇ 2 are specified in a cross section along the direction in which the unit elements 48 are arranged.
  • the wall portion inclination angle ⁇ 1 is measured in a cross section parallel to both the normal direction of the decorative sheet and the first direction D1.
  • the wall portion inclination angle ⁇ 2 is measured in a cross section parallel to both the normal direction of the decorative sheet and the second direction D2.
  • the wall inclination angles ⁇ 1 and ⁇ 2 are angles (°) between a straight line SXL passing through the first position PX and the second position PY on the unit element 48 and the normal direction D3.
  • the wall inclination angles ⁇ 1 and ⁇ 2 are 0° or more and 90° or less.
  • the first position PX is lower than the highest position HXP by 10% of the height difference HXD between the highest position HXP of the unit convex portion 48A crossed by the measurement section and the lowest position LXP of the unit concave portion 48B adjacent to the unit convex portion 48A. This is the position on the side wall 42A of the unit convex portion 48A.
  • the second position PY is a position on the side wall 42B of the unit concave portion 48B which is higher than the lowest position LXP by 10% of the height difference HXD.
  • the first position PX is positioned between the highest position HXP and the lowest position LXP in one direction, which is the arrangement direction of the unit elements 48 .
  • a plurality of positions lower than the highest position HXP by 10% of the height difference HXD can exist between the highest position HXP and the lowest position LXP in the arrangement direction of the unit element 48 .
  • the position closest to the lowest position LXP in the arrangement direction of the unit elements 48 is the first position PX.
  • the second position PY is positioned between the highest position HXP and the lowest position LXP in one direction, which is the arrangement direction of the unit elements 48 .
  • a plurality of positions higher than the lowest position LXP by 10% of the height difference HXD can exist between the highest position HXP and the lowest position LXP in the arrangement direction of the unit element 48 .
  • the position closest to the highest position HXP in the arrangement direction of the unit elements 48 is the second position PY.
  • the maximum length of the unit element 48, the unit convex portion 48A and the unit concave portion 48B may be 50 ⁇ m or less, 40 ⁇ m or less, 30 ⁇ m or less, or 25 ⁇ m or less.
  • the maximum length of the unit element 48, the unit convex portion 48A, and the unit concave portion 48B may be 1 ⁇ m or longer, 2 ⁇ m or longer, 4 ⁇ m or longer, or 6 ⁇ m or longer.
  • the maximum lengths of the unit elements 48, the unit convex portions 48A, and the unit concave portions 48B are maximum lengths when observed from the third direction D3, in other words, when projected onto a plane orthogonal to the third direction D3.
  • the individual unit elements 48 are suppressed from being observed, and the linear elements are observed as a continuous line. .
  • the lower limits for the maximum lengths of the unit elements 48, the unit convex portions 48A, and the unit concave portions 48B it is possible to prevent the individual unit elements 48 from being unintentionally connected during manufacturing.
  • the height difference of the uneven structure 41 formed by the unit convex portions 48A and the unit concave portions 48B may be 0.3 ⁇ m or more, 0.5 ⁇ m or more, or 1 ⁇ m or more.
  • the height difference of the uneven structure 41 formed by the unit convex portions 48A and the unit concave portions 48B may be 20 ⁇ m or less, 10 ⁇ m or less, or 5 ⁇ m or less.
  • the height difference of the uneven structure 41 is the difference between the highest position and the lowest position along the third direction D3.
  • an upper limit may be set for Rz of the linear element 45 along the longitudinal direction of the linear element 45 .
  • Rz is the ten-point average roughness ( ⁇ m) according to JISB0601-1994.
  • the ten-point average roughness Rz is a value measured using a scanning white light interferometer (NewView6300) manufactured by Zygo Corporation.
  • the measurement area in this measuring device is 1076 ⁇ m square, and the “cylinder” set in the measuring device is used to remove the undulation component.
  • the wall inclination angles ⁇ 1 and ⁇ 2 described above are calculated from the surface shape of the linear pattern layer 40 measured using a scanning white light interferometer (New View 6300) manufactured by Zygo Corporation.
  • the Rz of the linear element 45 along the longitudinal direction of the linear element 45 may be 5.5 ⁇ m or less, 5 ⁇ m or less, 4.5 ⁇ m or less, 4 ⁇ m or less, or 3 ⁇ m or less.
  • the Rz of the linear element 45 along the longitudinal direction of the linear element 45 is specified by measuring Rz at five points and averaging the three measurements excluding the maximum and minimum measurements.
  • the lower limit of Rz of the linear element 45 along the longitudinal direction of the linear element 45 is not particularly set.
  • Rz of the linear element 45 along the longitudinal direction of the linear element 45 may be greater than 0 ⁇ m or 1 ⁇ m or more.
  • a lower limit may be set for the difference in Rz of the linear elements 45 along the longitudinal direction of the linear elements 45 between two adjacent linear elements 45 .
  • the difference in Rz of the linear elements 45 along the longitudinal direction of the linear elements 45 between two adjacent linear elements 45 may be 1 ⁇ m or more, 1.5 ⁇ m or more, 2 ⁇ m or more, or 2 ⁇ m or more. .5 ⁇ m or more, 3 ⁇ m or more, or 4 ⁇ m or more.
  • the upper limit of the difference in Rz of the linear elements 45 along the longitudinal direction of the linear elements 45 between two adjacent linear elements 45 is not particularly set.
  • the difference in Rz of the linear elements 45 along the longitudinal direction of the linear elements 45 between two adjacent linear elements 45 may be 5 ⁇ m or less.
  • the Rz of the linear elements 45 along the longitudinal direction is the arrangement ratio (%) of the unit convex portions 48A and the arrangement of the unit concave portions 48B. It can be adjusted by the ratio (%).
  • FIG. 28 is a graph showing the relationship between the arrangement ratio (%) of the unit concave portions 48B and the Rz of the linear element 45 along the longitudinal direction.
  • the arrangement ratio of the unit concave portions 48B in the linear element 45 may be greater than 0% and 40% or less, may be greater than 0% and 35% or less, or may be greater than 0% and 30%. % or less, greater than 0% and 25% or less, greater than 0% and 20% or less, or greater than 0% and 15% or less.
  • the arrangement ratio of the unit concave portions 48B in the linear element 45 may be 60% or more and less than 100%, may be 65% or more and less than 100%, or may be 70% or more. It may be less than 100%, or 80% or more and less than 100%.
  • the arrangement ratio of the unit concave portions 48B may be larger than the arrangement ratio of the unit convex portions 48A.
  • the arrangement ratio of the unit recesses 48B may be greater than 50%.
  • FIG. 28 by setting the arrangement ratio of the unit concave portions 48B and the arrangement ratio of the unit convex portions 48A in this way, it is possible to suppress the Rz of the linear element 45 along the longitudinal direction from becoming too large. As a result, blurring of the contour of the image can be suppressed.
  • the unit recesses 48B may not be arranged continuously in the arrangement direction of the unit elements 48.
  • the unit convex portions 48A may not be arranged continuously in the arrangement direction of the unit elements 48.
  • FIG. For example, assume that the unit elements 48 are arranged in a first arrangement direction (eg, first direction D1) and in a second arrangement direction (eg, second direction D2) non-parallel to the first arrangement direction.
  • the unit elements 48 adjacent to any unit recesses 48B in the first arrangement direction are the unit protrusions 48A, and the unit recesses 48B and Unit elements 48 adjacent to each other in the second arrangement direction may be unit convex portions 48A.
  • the ratio of the unit recesses 48B in the linear pattern layer 40 is 60% or more
  • the unit elements 48 adjacent to the arbitrary unit protrusions 48A in the first arrangement direction are the unit recesses 48B
  • the unit element 48 adjacent to the portion 48A in the second arrangement direction may be the unit concave portion 48B.
  • the unit convex portions 48A and the unit concave portions 48B function to express the matt feeling and the gloss feeling. As a result, two adjacent linear elements 45 can be distinguished and observed, and the linear pattern 35 can be clearly observed.
  • the decorative sheet 30 may include a bonding layer 62 for the purpose of improving adhesion between constituent elements.
  • the bonding layer 62 improves adhesion between the linear pattern layer 40 and the design layer 60 .
  • the bonding layer 62 can be formed using various adhesives and adhesives such as acrylic resin and epoxy resin.
  • the thickness of the bonding layer 62 may be, for example, 1 ⁇ m or more and 80 ⁇ m or less.
  • the bonding layer 62 may be omitted.
  • the decorative sheet 30 may include a design layer 60 for the purpose of improving the design.
  • the design layer 60 may be a colored layer as a monochromatic uniform layer.
  • the design layer 60 may be a pattern layer having a pattern.
  • the design layer 60 may be a metal layer containing metal.
  • the design layer 60 may include two or more of a colored layer, a pattern layer and a metal layer.
  • the picture layer may display figures, patterns, designs, colors, pictures, photographs, characters, marks, pictograms, letters and numbers.
  • the pattern layer may perform design expression to display the background. For example, as patterns that can harmonize the surrounding environment in which the display system 10, the decorative member 20, and the decorative sheet 30 are provided, and the decorative sheet, there are wood grain patterns, marble patterns, metallic textures, and geometric patterns. , the pattern layer may be displayed.
  • the colored layer and pattern layer can be made from a coating film of a resin composition.
  • the resin composition may contain a binder resin, a colorant, a solvent, a stabilizer, a plasticizer, a catalyst, a curing agent, an ultraviolet absorber, a light stabilizer, and the like. Colorants may be pigments or dyes.
  • the thickness of the colored layer and pattern layer may be 0.5 ⁇ m or more and 50 ⁇ m or less, 1 ⁇ m or more and 20 ⁇ m or less, or 2 ⁇ m or more and 10 ⁇ m or less.
  • the metal layer may contain one or more of metal elements such as gold, silver, copper, tin, iron, nickel, chromium, and cobalt.
  • Metal layers may include alloys such as brass, bronze, stainless steel, and the like.
  • the thickness of the metal layer may be about 0.1 ⁇ m to 1 ⁇ m.
  • a plate 90 corresponding to the linear pattern 35 to be manufactured is produced.
  • 9 and 12 show an example of the plate 90.
  • FIG. The plate 90 shown in FIG. 9 is a so-called roll plate.
  • the plate 90 has a cylindrical outer shape.
  • the plate 90 is held rotatably around the cylindrical central axis CA.
  • the plate 90 has a plate surface 91 on its cylindrical outer peripheral surface.
  • the plate surface 91 is an uneven surface corresponding to the linear pattern to be transferred.
  • the plate surface 91 is an uneven surface corresponding to the uneven structure 41 of the linear pattern layer 40 displaying the linear pattern 35 .
  • the plate surface 91 of the plate 90 includes a plurality of plate linear elements 92 arranged in an axial direction parallel to the central axis CA.
  • Each plate-like element 92 is a plate-like protrusion 92A or a plate-like recess 92B.
  • the plate line-shaped convex portion 92A protrudes outward away from the central axis CA in the radial direction perpendicular to the central axis CA.
  • the stencil-shaped concave portion 92B is recessed inward and close to the central axis CA in the radial direction perpendicular to the central axis CA.
  • the plate linear projections 92A and the plate linear recesses 92B are alternately arranged in the axial direction.
  • the plate-like elements 92 are elongated in the circumferential direction about the central axis CA.
  • Each plate line element 92 includes plate unit elements 93 arranged two-dimensionally.
  • the plate line element 92 includes a plurality of plate unit elements 93 respectively arranged in two non-parallel directions along the plate surface 91 .
  • the plate unit element 93 is a plate unit convex portion 93A or a plate unit concave portion 93B.
  • the plate unit convex portion 93A protrudes radially outward.
  • the plate line-shaped recess 92B is recessed inward in the radial direction.
  • the plate surface 91 of the plate 90 is manufactured according to the linear pattern to be manufactured.
  • multi-tone grayscale image data 95 for the linear pattern 35 is prepared.
  • the multi-tone grayscale image data 95 is grayscale data.
  • the multi-tone grayscale image data 95 is data of three or more tones.
  • the image data 95 can be prepared by scanning the linear pattern 35 to be manufactured in grayscale.
  • FIG. 10 shows an example of the image data 95. As shown in FIG. Image data 95 shown in FIG. 10 is data relating to a hairline pattern.
  • a pixel area 97 corresponding to each pixel 96 of the image data 95 is set.
  • the pixel area 97 is an area on the metal plate forming the plate 90 and finally becomes an area on the plate surface 91 .
  • a large number of pixel regions 97 are distributed in the same arrangement as the pixels 96 included in the image data 95 .
  • Each pixel region 97 is then divided into a plurality of sub-regions 98, as shown in FIG.
  • the number of sub-regions 98 corresponding to one pixel region 97 is not particularly limited.
  • the number of sub-regions 98 corresponding to one pixel region 97 may be two, four, eight, or sixteen.
  • Each subregion 98 is then assigned to either a first region 99a or a second region 99b.
  • the sub-region 98 displayed in white is set as the first area 99a.
  • a sub-region 98 displayed in black and white is set as a second section 99b.
  • the first area 99a and the second area 99b may be randomly allocated.
  • the proportion of the first area in each pixel area 97 may be determined according to the gradation of the pixel.
  • the proportion of the second area in each pixel area 97 may be determined according to the gradation of the pixel.
  • the image data 95 has 256 levels of gradation
  • all 16 sub-regions 98 may be used as the first regions 99a.
  • the image data 95 has 256 levels of gradation
  • one of the 16 sub-regions 98 may be used as the second region 99b.
  • the image data 95 has 256 levels of gradation
  • the gradation of the pixel 96 is 32 or more and 47 or less
  • one of the 16 sub-regions 98 may be used as the second region 99b.
  • the percentage of the first area in each pixel region 97 corresponding to that pixel may vary from 0% to 100%.
  • the percentage of the first area in each pixel region 97 corresponding to that pixel is increased from 0% to 40% and from 60% to 100%. You can change it. That is, the ratio of the first area in the pixel area 97 may be set so as not to be within the range of more than 40% and less than 60%. As yet another example, as the gradation of a pixel increases from 0 to maximum gradation, the percentage of the first area in each pixel region 97 corresponding to that pixel may vary from 0% to 40%. .
  • the proportion of the first area in each pixel region 97 corresponding to that pixel may vary from 60% to 100%. According to these examples, it is possible to obtain a plate used for producing the linear pattern layer 40 in which the arrangement ratio of the unit concave portions 48B is 40% or less or 60% or more. In other words, it is possible to obtain a plate used for producing the linear pattern layer 40 in which the arrangement ratio of the unit convex portions 48A is 40% or less or 60% or more.
  • This kind of processing corresponds to converting the grayscale to monochrome two-tone.
  • Monochrome 2-gradation is not limited to the example described above, and an error diffusion method or a halftone screen may be employed.
  • the error diffusion method when the ratio of the first regions 99a is 40% or less, in other words, when the ratio of the second regions 99b is 60% or more, the first regions 99a are continuous along the arrangement direction. You can avoid it. Further, when the ratio of the first regions 99a is 60% or more, in other words, when the ratio of the second regions 99b is 40% or less, the second regions 99b can be made discontinuous along the arrangement direction.
  • the unit convex portions 48A can be prevented from continuing in the arrangement direction.
  • the first area 99a and the second area 99b can be laid out in a region coextensive with the image data 95 of the linear pattern 35. Then, the metal surface that forms the plate surface 91 is etched in the same pattern as the arrangement pattern of the second areas 99b. A recess is not formed in the metal surface at a position corresponding to the first area 99a.
  • the recesses at positions corresponding to the second areas 99b may be formed by etching using photolithography technology.
  • a recess at a position corresponding to the second area 99b may be formed by laser drawing.
  • the concave portions formed in this manner constitute the plate unit concave portions 93B included in each of the plate linear elements 92 of the printing plate surface 91 .
  • a position corresponding to the first area 99a where no recess is formed constitutes a plate unit convex portion 93A included in each plate linear element 92 of the plate surface 91. As shown in FIG.
  • the metal surface forming the printing plate may be one main surface of a copper plate.
  • a metal plate such as a copper plate constitutes the plate surface 91 by being attached to the outer peripheral surface of the cylindrical core.
  • the surface of the copper plate may be chrome plated after the formation of the uneven surface is completed.
  • the blasting treatment is performed before the chrome plating treatment described above.
  • the pitch of the fine unevenness provided on the plate surface 91 may be shorter than the arrangement pitch of the plate-unit elements 93 .
  • the height difference of the fine unevenness provided on the plate surface 91 may be smaller than the height difference of the plate unit elements 93 .
  • the degree of fine unevenness can be adjusted by the type, size, and shape of the abrasive used in the blasting process, the ejection conditions of the abrasive, and the like. As will be described later with reference to FIG.
  • FIG. 23 by providing fine unevenness to the plate surface 91, fine unevenness can be imparted to the surface of the linear element 45.
  • FIG. The fine unevenness of the linear elements 45 can weaken the lens effect and light guiding action of the linear elements 45 .
  • the minute unevenness of the linear elements 45 promotes the diffusion of light incident on the linear pattern layer 40, making the linear pattern 35 clearer.
  • the plate 90 is produced as described above. Next, using the produced plate, the decorative sheet 30 is produced.
  • the plate 90 is used to fabricate the resin imprint layer 80 .
  • An uneven structure 81 obtained by transferring the unevenness of the plate surface 91 is provided to the resin imprinting layer 80 .
  • Concavo-convex structure 81 has a configuration complementary to plate surface 91 .
  • the resin transfer layer 80 may be produced using the plate 90 as follows.
  • the plate 90 is rotated around the central axis CA.
  • a long base material 70 is supplied toward the plate 90 .
  • an uncured curable resin composition is supplied between the substrate 70 and the plate 90 .
  • a resin film such as a polyethylene terephthalate film may be used.
  • an ionizing radiation curable resin composition is exemplified.
  • ionizing radiation-curable resin compositions include ultraviolet-curable resin compositions and electron beam-curable resin compositions.
  • the curable resin composition is cured between the plate 90 and the substrate 70 .
  • the ultraviolet curable resin composition is irradiated with ultraviolet rays that have passed through the base material 70 .
  • the electron beam that has passed through the substrate 70 is applied to the electron beam curable resin composition.
  • a resin transfer layer 80 is produced from the cured product of the curable resin composition.
  • the resin imprinting layer 80 is bonded to the base material 70 .
  • the resin imprint layer 80 includes a plurality of second linear elements 82 corresponding to the plate linear elements 92 .
  • the second linear elements 82 are formed corresponding to the plate linear elements 92 .
  • the plurality of second linear elements 82 are arranged in one direction.
  • Each second linear element 82 elongates in the other direction orthogonal to the one direction.
  • the second linear element 82 is a second linear protrusion 82A or a second linear recess 82B.
  • a second linear concave portion 82B is formed corresponding to the plate linear convex portion 92A.
  • a second linear protrusion 82A is formed corresponding to the plate linear recess 92B.
  • the second linear protrusions 82A and the second linear recesses 82B are alternately arranged in one direction.
  • Each second linear element 82 includes second unit elements 83 arranged two-dimensionally. That is, each second linear element 82 includes a plurality of second unit elements 83 arranged in two non-parallel directions.
  • the second unit element 83 is a second unit convex portion 83A or a second unit concave portion 83B.
  • a second unit concave portion 83B is formed corresponding to the plate unit convex portion 93A.
  • a second unit convex portion 83A is formed corresponding to the plate unit concave portion 93B.
  • the base material 70 is separated from the plate surface 91 of the plate 90.
  • the resin imprint layer 80 includes a sheet-like land portion 84 bonded to the base material 70 .
  • the land portion 84 is formed integrally with the second linear convex portion 82A.
  • the land portion 84 is exposed between the two second linear convex portions 82A at the position where the second linear concave portion 82B is provided.
  • the land portion 84 is formed integrally with the second unit convex portion 83A.
  • the land portion 84 is exposed between the two second unit recesses 83B at the position where the second unit recesses 83B are provided.
  • the first resin composition is supplied to the surface of the resin transfer layer 80 peeled off from the plate 90 that was in contact with the plate 90 to form a coating film of the first resin composition. do.
  • the coating layer 72 is formed by drying or curing the coating film of the first resin composition. Concavities and convexities corresponding to the concavo-convex structure 81 of the resin imprinting layer 80 remain on the surface of the coating layer 72 .
  • the coating layer 72 may contain a thermoplastic resin.
  • the coating layer 72 may contain a cured product of a curable resin composition.
  • the curable resin composition may be a thermosetting resin composition or an ionizing radiation curable resin composition.
  • the coating layer 72 may contain a material having releasability such as silicone.
  • the coating layer 72 functions as a release layer 73 by containing the peelable material. However, the production of the coating layer 72 may be omitted and the linear pattern layer 40 may be formed on the resin imprinting layer 80 .
  • the uneven structure 41 of the linear pattern layer 40 produced by transferring the uneven structure 81 of the resin imprint layer 80 can be smoothed.
  • the smoothness of the uneven structure 41 can be adjusted by the thickness of the coating layer 72, the viscosity of the first resin composition, the drying speed, the curing speed, and the like.
  • the thickness of the coating layer 72 may be 5% or more, 10% or more, 20% or more, or 30% or more of the height difference of the uneven structure 81 of the resin molding layer 80 .
  • the thickness of the coating layer 72 By setting the thickness of the coating layer 72 to be 5% or more of the height difference of the uneven structure 81, the lens effect and the light guiding action of the linear elements 45 can be weakened.
  • the thickness of the coating layer 72 By setting the thickness of the coating layer 72 to be 5% or more of the height difference of the concave-convex structure 81, the diffusion of incident light to the linear pattern layer 40 can be promoted and the linear pattern 35 can be made clearer.
  • a second resin composition is supplied onto the resin imprinting layer 80 and the coating layer 72 to form a coating film of the second resin composition.
  • the second resin composition may be a curable resin composition.
  • the curable resin composition may be a thermosetting resin composition or an ionizing radiation curable resin composition. Examples of ionizing radiation-curable resin compositions include ultraviolet-curable resin compositions and electron beam-curable resin compositions.
  • the curable resin composition is cured on the resin transfer layer 80 and the coating layer 72 .
  • the linear pattern layer 40 is produced from the cured product of the curable resin composition.
  • the curing treatment of the curable resin composition at this timing may be complete curing or semi-curing. If the effect treatment at this timing is semi-curing, the curing treatment may be performed at any later timing.
  • the produced linear pattern layer 40 is bonded to the resin imprinting layer 80 or the coating layer 72 .
  • a concave-convex structure 41 corresponding to the concave-convex structure 81 of the resin molding layer 80 is applied to the linear pattern layer 40 .
  • Linear elements 45 of the linear pattern layer 40 are formed corresponding to the second linear elements 82 .
  • Linear recesses 45B of the linear pattern layer 40 are formed corresponding to the second linear protrusions 82A.
  • Linear protrusions 45A of the linear pattern layer 40 are formed corresponding to the second linear recesses 82B.
  • a unit element 48 of the linear pattern layer 40 is formed corresponding to the second unit element 83 .
  • a unit concave portion 48B of the linear pattern layer 40 is formed corresponding to the second unit convex portion 83A.
  • Unit convex portions 48A of the linear pattern layer 40 are formed corresponding to the second unit concave portions 83B.
  • the base portion 43 is also formed by the cured product of the curable resin composition.
  • the base portion 43 is formed integrally with the linear convex portion 45A.
  • the base portion 43 is exposed between the two linear convex portions 45A at the position where the linear concave portion 45B is provided.
  • the base portion 43 is formed integrally with the unit convex portion 48A.
  • the base portion 43 is exposed between the two unit convex portions 48A at the position where the unit concave portion 48B is provided.
  • the linear pattern layer 40 may contain a cured product of an electron beam curable resin composition.
  • the second resin composition may be an electron beam curable resin composition.
  • the linear pattern layer 40 containing the cured product of the electron beam curable resin composition has excellent durability. Therefore, it is possible to prevent the surface of the linear pattern layer 40 including the fine uneven structure 41 from flattening due to long-term use.
  • the linear pattern layer 40 containing the cured product of the electron beam curable resin composition may contain an ultraviolet absorber and a light stabilizer in order to further improve durability.
  • the second resin composition may contain an electron beam-curable resin composition and at least one of an ultraviolet absorber and a light stabilizer.
  • the ultraviolet curable resin composition cannot contain an ultraviolet absorber depending on its curing process. Therefore, unlike the linear pattern layer containing the cured product of the ultraviolet curable resin composition, the linear pattern layer containing the cured product of the electron beam curable resin composition can contain an ultraviolet absorber.
  • the linear pattern layer 40 containing an ultraviolet absorber can further improve durability and suppress flattening during long-term use.
  • ultraviolet absorbers examples include benzotriazole-based ultraviolet absorbers, benzophenone-based ultraviolet absorbers, triazine-based ultraviolet absorbers, and hydroxyphenyltriazine-based ultraviolet absorbers.
  • light stabilizers include hindered amine light stabilizers such as piperidinyl sebacate light stabilizers.
  • a bonding layer 62 is formed over the linear pattern layer 40 .
  • the bonding layer 62 may be produced by supplying a resin composition onto the linear pattern layer 40 to form a coating film of the resin composition, and drying or curing the coating film.
  • the design layer 60 is formed over the bonding layer 62 .
  • the design layer 60 may be formed by gravure printing, screen printing, or thermal transfer printing using an ink ribbon.
  • the decorative sheet 30 is formed over the resin molding layer 80 .
  • the decorative sheet 30 is bonded to the resin molding layer 80 and the coating layer 72 .
  • the decorative sheet 30 constitutes the decorative sheet laminate 25 together with the resin imprint layer 80 .
  • the decorative sheet laminate 25 includes the decorative sheet 30, the coating layer 72, the resin molding layer 80 and the substrate 70 in order in the third direction D3.
  • the decorative member 20 is produced using the decorative sheet 30 .
  • An injection molding device 110 is prepared as shown in FIG.
  • Injection molding apparatus 110 includes mold 111 .
  • Mold 111 includes a first mold 111A and a second mold 111B.
  • the first mold 111A and the second mold 111B can be separated from each other as shown in FIG. 17 and can be close to each other as shown in FIG.
  • a cavity 112 is formed between the first die 111A and the second die 111B in the closed state in which the first die 111A and the second die 111B are in contact with each other.
  • Mold 111 has a gate 113 leading to cavity 112 .
  • the gate 113 is connected to a supply device for the injection resin 114 (not shown).
  • An injection resin 114 is supplied into the cavity 112 through the gate 113 .
  • the first mold 111A and the second mold 111B are heated by a heater (not shown) and maintained at a high temperature.
  • the decorative sheet laminate 25 is accommodated in the cavity 112 within the molding die 111 .
  • the decorative sheet laminate 25 is arranged in the second mold 111B such that the decorative sheet 30 is exposed in the cavity 112.
  • molten injection resin 114 is injected into cavity 112 through gate 113 .
  • the injected resin 114 is cooled in the cavity 112, welded to the decorative sheet 30 and solidified.
  • the thermoplastic resin portion 64 joined to the decorative sheet 30 is obtained from the solidified injected resin 114 .
  • the material of the thermoplastic resin portion 64 is as described above.
  • the first die 111A and the second die 111B are separated from each other.
  • the thermoplastic resin portion 64 is joined to the first mold 111A.
  • the base material 70 may be fixed to the second mold 111B.
  • the base material 70 and the resin transfer layer 80 are separated from the decorative sheet 30 as the first mold 111A and the second mold 111B are separated. . Peeling is promoted by the coating layer 72 functioning as a release layer 73 .
  • the decorative sheet 30 and the decorative member 20 are manufactured.
  • the linear pattern layer 40 may be hardened on the decorative member 20 removed from the mold 111 . After forming at least one of the bonding layer 62 and the design layer 60, the linear pattern layer 40 may be cured.
  • the decorative sheet 30 may be produced from the decorative sheet laminate 25 by the injection molding process shown in FIGS. 29A to 29D.
  • a pattern laminate 26 is formed on the decorative sheet laminate 25 as shown in FIG. 29A.
  • the pattern laminate 26 is formed on the surface of the decorative sheet laminate 25 opposite to the decorative sheet 30 .
  • patterned laminate 26 is formed on the surface of substrate 70 .
  • the pattern laminate 26 may be made by printing, eg silk printing. Pattern laminate 26 covers only a portion of the surface of substrate 70 .
  • the thickness of the pattern laminate 26 may be 5 ⁇ m or more and 50 ⁇ m or less. Subsequent steps may be the same as the steps described above. That is, as shown in FIG.
  • the decorative sheet laminate 25 including the pattern laminate 26 may be arranged in the cavity 112.
  • Injected resin 114 may be injected into cavity 112, as shown in FIG. 29C.
  • the thermoplastic resin portion 64 joined to the decorative sheet 30 is produced from the injection resin 114 .
  • FIG. 29D the separation of the first die 111A and the second die 111B separates the decorative sheet 30 from the decorative sheet laminate 25, and the decorative member including the decorative sheet 30 and the thermoplastic resin portion 64 is removed. 20 is obtained.
  • the injection resin 114 presses the decorative sheet laminate 25 toward the second mold 111B.
  • the surface of the decorative sheet laminate 25 on which the pattern laminate 26 is provided is flattened along the second die 111B, and unevenness corresponding to the pattern of the pattern laminate 26 is formed on the decorative sheet 30.
  • the thermoplastic resin portion 64 is joined to the decorative sheet 30 including unevenness corresponding to the pattern of the pattern laminate 26 .
  • concave portions 27 are formed in a pattern corresponding to the pattern laminate 26 in the linear pattern layer 40 of the obtained decorative member 20 .
  • the decorative member 20 can express two types of unevenness: large unevenness due to the concave portions 27 and fine unevenness due to the linear pattern layer 40 . That is, the decorative sheet 30 can express a delicate and complicated design.
  • the depth of the concave portion 27 may be 5 ⁇ m or more, 10 ⁇ m or more, or 20 ⁇ m or more.
  • the depth of the concave portion 27 may be 50 ⁇ m or less, 40 ⁇ m or less, or 30 ⁇ m or less.
  • the depth of the concave portions 27 may be two times or more, three times or more, or four times or more the height difference of the unevenness caused by the linear elements 45 in the linear pattern layer 40 .
  • the depth of the recesses 27 may be 10 times or less, 8 times or less, or 6 times or less the height difference of the unevenness caused by the linear elements 45 in the linear pattern layer 40 .
  • the pitch of the concave portions 27 along the arrangement direction of the linear elements 45 may be 20 ⁇ m or more, 50 ⁇ m or more, or 100 ⁇ m or more.
  • the pitch of the concave portions 27 along the arrangement direction of the linear elements 45 may be 3000 ⁇ m or less, 1000 ⁇ m or less, or 300 ⁇ m or less.
  • the pitch of the concave portions 27 along the arrangement direction of the linear elements 45 may be twice or more, three times or more, or five times or more the arrangement pitch of the linear elements 45 in the arrangement direction.
  • the pitch of the concave portions 27 along the arrangement direction of the linear elements 45 may be 10 times or less, 8 times or less, or 6 times or less than the arrangement pitch of the linear elements 45 in the arrangement direction.
  • the decorative sheet 30 of the decorative member 20 includes a linear pattern layer 40 displaying the linear pattern 35.
  • the decorative sheet 30 of the decorative member 20 includes a design layer 60 that displays designs such as patterns and colors.
  • the design of the design layer 60 is observed through the linear pattern layer 40 .
  • the observer observes the linear pattern 35 of the linear pattern layer 40 and the design of the design layer 60 overlapping each other. For example, along with the dark color due to the design layer 60, the linear pattern 35 due to the linear pattern layer 40 is observed. In the example shown in FIG.
  • the decorative sheet 30 displays a linear pattern imitating a hairline pattern produced by subjecting a metal plate to hairline processing and coloring.
  • the decorative sheet 30 displays a linear pattern imitating a spin pattern produced by spinning and coloring a metal plate.
  • the decorative sheet 30 displays linear elements imitating a wood grain pattern.
  • the decorative sheet 30 displays linear elements imitating a textile pattern.
  • the decorative sheet 30 displays a denim pattern as an example of a cloth pattern.
  • the decorative sheet 30 displays a carbon pattern.
  • the decorative member 20 and the decorative sheet 30 can be applied to automobile interiors, building interiors, furniture, home electric appliances, and the like, where design is important.
  • the light source device 12 or the display device 16 can be hidden by a decorative sheet 30 displaying a linear pattern in a non-operating state.
  • the display system 10 including the decorative sheet 30 can be applied to interiors of automobiles, interiors of buildings, furniture, home electric appliances, etc., where design is important.
  • the decorative member 20 includes a light shielding pattern sheet 66. As shown in FIG. The light shielding area 66 a of the light shielding pattern sheet 66 shields the light from the light source device 12 .
  • the transmissive region 66b allows the light from the light source device 12 to pass therethrough.
  • the combination of the light source device 12 and the light shielding pattern sheet 66 forms an image 100 having a shape corresponding to the shape of the transmissive area 66b. Image light forming this image passes through the decorative sheet 30 .
  • An image 100 is viewed by image light emitted from the display system 10 . In the example shown in FIG. 4, display system 10 displays cross, triangle and square marks as image 100 .
  • the display device 16 including the light source device 12 forms image light.
  • Image light emitted from the display surface 16 a passes through the decorative sheet 30 .
  • the display system 10 displays the image observed by the observer.
  • Patent Document 1 JP-A-2010-52353
  • Patent Document 2 JP-A-2008-89479
  • conventional decorative sheets are composed of linear projections or linear recesses. contains a linear element with The linear elements are arranged in a direction perpendicular to their longitudinal direction. Linear elements can be made by resin molding such as embossing.
  • bleeding 101 is a phenomenon in which light leaks to the outside of the area where the image 100 is to be displayed, making the area slightly brighter.
  • the image 100 to be displayed is square shaped.
  • blurring 101 occurs around image 100 . That is, the bleeding 101 occurs in a region adjacent to the image 100 in the arrangement direction of the linear elements 45 (the second direction D2 in the illustrated example). Bleeding 101 also occurs in a region adjacent to image 100 in the longitudinal direction of linear element 45 (first direction D1 in the illustrated example).
  • first direction D1 in the illustrated example Conventional decorative sheets cannot display sharp images.
  • the linear elements have steep side walls in the normal direction of the decorative sheet.
  • the outer contour of the side wall is slightly inclined and curved.
  • the sidewalls can exert a lens effect on the light emitted from the linear element through the sidewalls. It was presumed that the light emitted from the linear elements in the arrangement direction is condensed to some extent by the lens effect on the side wall, and can be observed as blurring 101 spreading in the arrangement direction of the linear elements with respect to the image 100 .
  • Each linear element includes a pair of side walls that face each other in the arrangement direction. If the sidewalls rise in the normal direction, the light traveling through the linear element can repeatedly reflect, especially total internal reflection, at the sidewalls. In this way, the image light travels through the linear element in the longitudinal direction of the linear element. It was speculated that the image light spreads along the linear element due to the light guide action in the linear element, and can be observed as blurring 101 that spreads in the longitudinal direction of the linear element with respect to the image 100 .
  • the linear pattern layer 40 includes multiple linear elements 45 .
  • the plurality of linear elements 45 are arranged in one direction, which is the arrangement direction (the second direction D2 in the illustrated example).
  • Each linear element 45 elongates in the other direction, which is the longitudinal direction (the first direction D1 in the illustrated example) perpendicular to the arrangement direction.
  • the linear element 45 includes unit elements 48 arranged two-dimensionally.
  • the unit element 48 is a unit convex portion 48A or a unit concave portion 48B.
  • the linear elements 45 do not include sidewalls extending in the longitudinal direction and facing the arrangement direction.
  • the elongated sidewalls can have a lens effect on the image light.
  • the side walls 42B facing the arrangement direction are dispersed in two directions within each linear element 45 according to the two-dimensional arrangement of the unit elements 48.
  • FIG. the sidewalls 42B facing the arrangement direction are dispersed within the linear regions 46 where the linear elements 45 are located. Therefore, the linear elements 45 are prevented from condensing the image light and guiding it in the arrangement direction of the linear elements 45 . That is, the lens effect on the side wall of the linear element 45 with respect to the image light is weakened. As a result, it is possible to suppress the occurrence of bleeding 101 that spreads from the image 100 in the arrangement direction of the linear elements 45 .
  • the outline of the image 100 facing the arrangement direction of the linear elements 45 can be made clear.
  • the linear elements 45 do not include sidewalls extending in the longitudinal direction and facing the arrangement direction. That is, the linear element 45 does not include a pair of side walls that can guide image light.
  • the side walls 42B facing the arrangement direction of the linear elements 45 are dispersed in two directions within each linear element 45 according to the two-dimensional arrangement of the unit elements 48 .
  • the side walls 42A facing the longitudinal direction of the linear elements 45 are distributed in two directions within each linear element 45 according to the two-dimensional arrangement of the unit elements 48.
  • FIG. In other words, the side walls 42A facing the longitudinal direction are distributed within the linear regions 46 where the linear elements 45 are located, as are the side walls 42B facing the arrangement direction. Thereby, the light guiding action by the linear element 45 can be weakened.
  • the linear element 45 includes side walls 42A non-parallel to the longitudinal direction at the intermediate portion in the longitudinal direction, in other words, other than at both ends in the longitudinal direction.
  • the side wall 42A regulates the light guiding action of the linear element 45. As shown in FIG. In this way, the light guiding action of the linear element 45 due to repeated reflection between the pair of side walls is weakened. This can suppress the occurrence of blurring 101 spreading from the image 100 in the longitudinal direction of the linear element 45 .
  • the outline of the image 100 facing the longitudinal direction of the linear element 45 can be clarified.
  • the wall inclination angles ⁇ 1 and ⁇ 2 (see FIG. 8) specified in the cross section along the arrangement direction of the unit elements 48 may be 66° or more, 73° or more, or 76° or more. It may be 90° as in the example shown in 7B. By setting the angle in this way, it is possible to effectively limit the light guide by the linear elements 45 and effectively suppress the bleeding 101 of the image 100 that occurs in the longitudinal direction of the linear elements 45 .
  • the decorative sheet 30 As described above, according to the decorative sheet 30 according to the first embodiment, blurring of the outline of the image can be suppressed in the operating state of the light source device 12 or the display device 16 . As a result, the outline of the image becomes clear, and blurring of the outline of the image can be suppressed.
  • Display system 10 is capable of displaying sharp images.
  • conventional decorative sheets containing linear elements composed of linear projections or linear recesses could not display linear patterns sufficiently clearly.
  • Conventional decorative sheets have a problem that linear patterns are difficult to recognize.
  • a linear element composed of linear protrusions or linear recesses has reflection directivity.
  • a linear pattern of a conventional decorative sheet is observed by an observer by reflecting light incident on the linear pattern from a specific direction toward the observer. Therefore, if the amount of light incident on the linear pattern from a specific direction and directed toward the observer is small, the observer cannot clearly observe the linear pattern. That is, the linear pattern cannot be clearly observed depending on the observation angle, the environmental conditions such as the arrangement of the external light source, the observation angle, and the like.
  • Conventional decorative sheets cannot express metallic luster because reflection is insufficient. As a result, conventional decorative sheets cannot sufficiently reproduce the texture of linear patterns such as hairline patterns and spin patterns using metal plates.
  • the linear pattern layer 40 includes multiple linear elements 45 .
  • Each linear element 45 is arranged in a linear region 46 .
  • Each linear region 46 is an elongated region.
  • Each linear element 45 also elongates.
  • This linear element 45 includes unit elements 48 .
  • Each unit element 48 is either a unit convex portion 48A or a unit concave portion 48B.
  • the arrangement ratio of the unit concave portions 48B may be different between two linear elements 45 adjacent to each other in one direction, which is the arrangement direction. Due to the difference in arrangement ratio of the unit concave portions 48B, each linear element 45 can be distinguished from other adjacent linear elements 45 and can be recognized as the linear element 45 by the observer.
  • the ten-point average roughness Rz of the linear elements 45 along the longitudinal direction may be different between two linear elements 45 adjacent to each other in one direction, which is the arrangement direction. Due to the difference in Rz of the linear elements 45, each linear element 45 can be distinguished from other adjacent linear elements 45 and can be recognized as the linear elements 45 by the observer. By identifying the linear elements 45 in this way, the linear pattern 35 can be observed.
  • the unit elements 48 are arranged two-dimensionally within the linear element 45 .
  • the unit regions 49 are arranged two-dimensionally within the linear region 46 .
  • Linear element 45 includes sidewalls 42 distributed along its length.
  • the linear elements 45 include sidewalls 42 dispersed in the direction of their arrangement. Therefore, light incident on the decorative sheet 30 from various directions can be reflected by the linear pattern layer 40 toward the viewer.
  • An observer can observe the linear patterns 35 of the linear pattern layer 40 by using ambient light incident on the decorative sheet 30 from various directions. Therefore, the linear pattern 35 of the linear pattern layer 40 can be brightly and clearly observed regardless of the incident direction of the ambient light depending on the external light source or the like, that is, regardless of the environmental conditions.
  • the linear pattern 35 of the linear pattern layer 40 can be observed brightly and clearly regardless of the viewing position.
  • the linear pattern layer 40 using resin has an excellent glossy feeling, and the decorative sheet 30 can sufficiently express the metallic texture.
  • the maximum length of the unit element 48 may be 1 ⁇ m or longer, 2 ⁇ m or longer, or 4 ⁇ m or longer.
  • the maximum length of the unit element 48 may be 200 ⁇ m or less, 100 ⁇ m or less, or 50 ⁇ m or less.
  • the maximum length of the unit element 48 is the maximum length when projected in the third direction D3.
  • the side walls 42 formed by the unit elements 48 are inclined with respect to the normal direction of the decorative sheet 30.
  • the wall portion inclination angles ⁇ 1 and ⁇ 2 may be 66° or more, 73° or more, or 76° or more.
  • the unit element 48 of the linear element 45 has a shape obtained by chamfering a unit convex portion 48A and a unit concave portion 48B having a rectangular cross section indicated by dotted lines.
  • a unit element 48 of the linear element 45 shown in FIG. 22 is a gently curved unit convex portion 48A or unit concave portion 48B.
  • the linear pattern layer 40 shown in FIG. 22 can be produced by resin molding using the resin molding layer 80 provided with the coating layer 72 in the manufacturing method described above. Also, the angle formed by the side walls 42 with respect to the normal direction can be adjusted by the thickness of the coating layer 72 . As shown in FIG.
  • the lens effect and light guiding action of the linear elements can be weakened. can.
  • the side wall 42 formed by the unit elements 48 with respect to the normal direction of the decorative sheet 30 by inclining the side wall 42 formed by the unit elements 48 with respect to the normal direction of the decorative sheet 30, the light reflected by the linear elements 45 is directed in various directions, and the linear pattern is formed. 35 can be clearly observed.
  • the surface of the linear pattern layer 40 may be formed with fine unevenness.
  • FIG. 23 shows an example in which the surface of the linear pattern layer 40 is roughened to provide fine unevenness.
  • the linear pattern layer 40 shown in FIG. 23 similarly to the linear pattern layer 40 shown in FIG. 22, the cross-sectional rectangular unit convex portions 48A and unit concave portions 48B indicated by the dotted lines are made smooth. have.
  • the linear pattern layer 40 shown in FIG. 23 has fine irregularities on its surface.
  • fine irregularities may be provided to the unit convex portions 48A and the unit concave portions 48B having rectangular cross-sections indicated by dotted lines.
  • the pitch of fine unevenness may be shorter than the arrangement pitch of the unit elements 48 .
  • the fine unevenness is arranged in the arrangement direction of the linear elements 45 (the second direction D2 in the illustrated example).
  • the fine unevenness may be arranged in the longitudinal direction of the linear element 45 (the first direction D1 in the illustrated example).
  • the height difference of fine unevenness may be smaller than the height difference of the unit elements 48 .
  • the fine unevenness shown in FIG. 23 can be produced by blasting the plate 90 in the manufacturing method described above.
  • the degree of fine unevenness can be adjusted by the type, size, and shape of the abrasive used in the blasting process, the ejection conditions of the abrasive, and the like.
  • FIG. 23 by providing fine unevenness to the surface of the linear element 45, the lens effect and light guiding action of the linear element can be effectively weakened.
  • the reflected light from the linear elements 45 is directed in various directions, and the linear pattern 35 can be clearly observed.
  • the maximum length of the unit element 48, the unit convex portion 48A, and the unit concave portion 48B may be 1 ⁇ m or longer, 2 ⁇ m or longer, 4 ⁇ m or longer, or 6 ⁇ m or longer.
  • the maximum length of the unit element 48, the unit convex portion 48A and the unit concave portion 48B may be 50 ⁇ m or less, 40 ⁇ m or less, 30 ⁇ m or less, or 25 ⁇ m or less.
  • the height difference of the uneven structure 41 formed by the unit elements 48 may be 0.3 ⁇ m or more, 0.5 ⁇ m or more, or 1 ⁇ m or more.
  • the height difference of the uneven structure 41 formed by the unit elements 48 may be 0.20 ⁇ m or less, 10 ⁇ m or less, or 5 ⁇ m or less.
  • the height difference of the uneven structure 41 is the difference between the highest position and the lowest position along the third direction D3.
  • the decorative sheet 30 includes the linear pattern layer 40.
  • Linear pattern layer 40 includes a plurality of linear elements 45 .
  • the total light transmittance of the decorative sheet 30 is 5% or more and 90% or less.
  • Each linear element 45 includes unit elements 48 arranged two-dimensionally.
  • the two-dimensionally arranged unit elements 48 can suppress the light guiding action and lens effect of the linear elements 45 . It is possible to suppress blurring of the contour of the image 100 . Therefore, by using the decorative sheet 30, a sharp image can be displayed.
  • the decorative sheet 30 includes the linear pattern layer 40.
  • Linear pattern layer 40 includes a plurality of linear elements 45 .
  • the total light transmittance of the decorative sheet 30 is 5% or more and 90% or less.
  • the linear element 45 includes, at its longitudinal intermediate portion, side walls 42A non-parallel to the longitudinal direction, in other words side walls 42A facing the longitudinal direction.
  • the side wall 42A that is positioned at the intermediate portion in the longitudinal direction of the linear element 45 and that is non-parallel to the longitudinal direction can suppress the light guiding action and lens effect of the linear element 45 . It is possible to suppress blurring of the contour of the image 100 . Therefore, by using the decorative sheet 30, a sharp image can be displayed.
  • the decorative sheet 30 includes the linear pattern layer 40.
  • the linear pattern layer 40 includes a plurality of linear elements 45 arranged in one direction. Each linear element 45 extends in the other direction perpendicular to the one direction.
  • Each linear element 45 includes unit elements 48 arranged two-dimensionally.
  • the unit element 48 is a unit convex portion 48A or a unit concave portion 48B.
  • the arrangement ratio of the unit concave portions 48B differs between two linear elements 45 adjacent to each other in one direction. Adjacent linear elements 45 are distinguished from each other because the arrangement ratio of the unit concave portions 48B is different.
  • the two-dimensionally arranged unit elements 48 can reflect light from various directions toward the observer.
  • the ambient light can be effectively used to clearly observe the linear pattern 35 as a set of linear elements 45 . Since the linear pattern layer 40 using resin can express various glossiness, it is possible to reproduce the texture similar to the texture of metal, the texture of natural objects such as grain patterns, the texture of cloth, and the like.
  • the decorative sheet 30 includes the linear pattern layer 40.
  • the linear pattern layer 40 includes a plurality of linear elements 45 arranged in one direction. Each linear element 45 extends in the other direction perpendicular to the one direction.
  • Each linear element 45 includes unit elements 48 arranged two-dimensionally.
  • the unit element 48 is a unit convex portion 48A or a unit concave portion 48B.
  • Rz of the linear element 45 is the ten-point average roughness Rz specified in JISB0601-1994. Since the ten-point average roughness Rz of the linear elements 45 is different, the diffuse reflectance of each linear element 45 is different.
  • adjacent linear elements 45 express different matte or glossy textures and are distinguished from each other. Therefore, the ambient light can be effectively used to clearly observe the linear pattern 35 as a set of linear elements 45 . Since the linear pattern layer 40 using resin can express various glossiness, it is possible to reproduce the texture similar to the texture of metal, the texture of natural objects such as grain patterns, the texture of cloth, and the like.
  • the decorative sheet 30 includes the linear pattern layer 40.
  • the linear pattern layer 40 includes a plurality of linear elements 45 arranged in one direction. Each linear element 45 extends in the other direction perpendicular to the one direction.
  • Each linear element 45 includes unit elements 48 arranged two-dimensionally.
  • the unit element 48 is a unit convex portion 48A or a unit concave portion 48B.
  • Two linear elements 45 adjacent to each other in one direction have different average heights. Adjacent linear elements 45 are distinguished from each other by the different average heights.
  • the two-dimensionally arranged unit elements 48 can reflect light from various directions toward the observer. Therefore, the ambient light can be effectively used to clearly observe the linear pattern 35 as a set of linear elements 45 . Since the linear pattern layer 40 using resin can express various glossiness, it is possible to reproduce the texture similar to the texture of metal, the texture of natural objects such as grain patterns, the texture of cloth, and the like.
  • the linear pattern 35 can be clearly displayed, and the conventional problems can be solved.
  • the decorative sheet 30 and the decorative member 20 according to the first embodiment, which can clearly display the linear pattern 35 need not be used in combination with the light source device 12 or the display device 16.
  • the decorative sheet 30 and the decorative member 20 according to the first embodiment that can clearly display the linear pattern 35 may not be used in the display system 10 .
  • the decorative sheet 30 and the decorative member 20 according to the first embodiment, which can clearly display the linear pattern 35 can be applied to the display system 10 described above.
  • the thermoplastic resin portion 64 may be transparent or colored.
  • the layer structure of the decorative sheet 30 and the decorative member 20 may be omitted from the decorative sheet 30 .
  • the decorative sheet 30 may include a light shielding pattern sheet 66.
  • the light shielding pattern sheet 66 may be omitted from the decorative sheet 30 and the decorative member 20.
  • the linear pattern layer 40 may include a protective layer forming the outermost surface of the decorative member 20 or the decorative sheet 30 .
  • the linear pattern layer 40 may include a concavo-convex base layer containing the plurality of linear elements described above, and a protective layer laminated on the concavo-convex base layer.
  • the protective layer may be thinly formed along the uneven surface of the uneven base layer.
  • the protective layer may be provided so as to fill the uneven surface of the uneven base layer so as to form a refractive index interface with the uneven base layer.
  • the protective layer may be a hard coat layer containing a cured product of a curable resin composition.
  • the arrangement of the components included in the decorative sheet 30 and the decorative member 20 can also be changed as appropriate.
  • the arrangement of the decorative sheet 30 and the decorative member 20 and the arrangement of the components included in the decorative sheet 30 and the decorative member 20 can be changed as appropriate.
  • the decorative member 20 and the decorative sheet 30 shown in FIGS. 1 and 24 to 26 may be arranged in the opposite direction in the third direction D3.
  • the display system 10 is configured by stacking the decorative member 20 on the light source device 12 or the display device 16 .
  • the display system 10 may be configured by stacking the decorative sheet 30 on the light source device 12 or the display device 16 .
  • the decorative sheet 30 is overlaid on the light source device 12 or the display device 16 from the third direction D3.
  • the decorative member 20 and the decorative sheet 30 may be flat. As shown in FIG. 27, the decorative member 20 and the decorative sheet 30 may have a three-dimensional shape, in other words, a three-dimensional shape. In the example shown in FIG. 27, the decorative member 20 and the decorative sheet 30 are bent on both sides in the first direction D1.
  • a three-dimensional shape may be imparted to the decorative sheet 30 by vacuum forming, pressure forming, or the like.
  • the decorating member 20 having a three-dimensional shape may be produced by insert-molding the decorating sheet 30 preformed by vacuum forming, pressure forming, or the like.
  • the decorating member 20 having a three-dimensional shape may be produced by using the decorating sheet 30 that has not been preformed for in-mold molding.
  • the decorative sheet 30 may be used for TOM molding to produce the decorative member 20 having a three-dimensional shape.
  • TOM molding is a three-dimensional overlay method, and can also be called three-dimensional surface decoration molding.
  • thermoplastic resin portion 64 is flat.
  • the thermoplastic resin part 64 produced by injection molding may have a three-dimensional shape, in other words, a three-dimensional shape.
  • the thermoplastic resin portion 64 may include a portion used for fixing the decorative member 20, for example, a portion to which a fixing member such as a screw is attached.
  • the decorative sheet 30 In the manufacturing method of the decorative sheet 30 described above, an example of producing the resin-imprinted layer 80 using the plate 90 and producing the decorative sheet 30 from the resin-imprinted layer 80 is shown.
  • the decorative sheet 30 may be directly manufactured from the plate 90 without forming the resin imprinting layer 80 . That is, the resin imprint layer 80 may constitute the linear pattern layer 40 .
  • Decorative members according to Examples 1 to 3 and decorative sheets according to Comparative Examples 1 and 2 were produced.
  • the produced decorative sheets according to Examples and Comparative Examples had a design layer, a joining layer and a linear pattern layer, like the decorative sheet shown in FIG.
  • a plate was produced, a laminate of a base material and a resin imprinting layer was produced using this plate, a decorative sheet laminate was produced from this laminate, and decorated.
  • a decorative sheet was produced by peeling off the substrate and the resin transfer layer from the sheet laminate.
  • Comparative Example 1 instead of the laminate of the substrate and the resin imprinting layer, a resin film whose surface was scratched with sandpaper was prepared. A decorative sheet was produced by peeling off the resin film.
  • Example 1 The above-described method described with reference to FIGS. 9 to 11 was used to prepare the plate.
  • the image data shown in FIG. 10 was used as the hairline pattern to be manufactured.
  • the image data shown in FIG. 10 are image data of a hairline sheet produced by marking a polyethylene terephthalate film.
  • the image data was converted to monochrome 2 gradation using the error diffusion method using Adobe Photoshop 2021.
  • the input image data was 3200 pixels/inch and the output was also 3200 pixels/inch. Then, by changing 3200 pixels/inch to 12800 pixels/inch, the arrangement pattern of the first area and the second area was created.
  • the width along the arrangement direction of the linear elements was about 40 to 100 ⁇ m.
  • a concave portion was formed on the surface of the metal plate according to the arrangement pattern of the second area.
  • the recess was formed by etching using a photolithographic technique.
  • a copper plate was used as the metal plate. After forming the recesses, the surface of the copper plate was plated with chrome.
  • the plate produced had the configuration described above. That is, the plate produced contained a plurality of plate linear elements. Each plate-like element was either a plate-like protrusion or a plate-like recess. Each plate-like element contained a two-dimensional array of plate-unit elements.
  • the plate unit elements were plate unit protrusions located in the first areas or plate unit recesses located in the second areas.
  • the plate-like elements were arranged in the longitudinal direction of the plate-like elements and in the arranging direction of the plate-like elements.
  • the plate-like element had a side wall facing the longitudinal direction of the plate-like element and a side wall facing the arrangement direction of the plate-like element.
  • the above-described manufacturing method described with reference to FIG. 12 was adopted for manufacturing the laminate including the substrate and the resin transfer layer using a plate.
  • a polyethylene terephthalate film was used as the substrate.
  • the resin imprinting layer was produced using an ultraviolet curable resin.
  • the manufactured resin-imparted layer had the structure described above. That is, the manufactured resin-imprinted layer contained a plurality of second linear elements. Each second linear element was either a second linear protrusion or a second linear recess. Each second linear element contained a two-dimensional array of second unit elements.
  • the second unit element was the second unit protrusion or the second unit recess.
  • the second unit elements were arranged in the longitudinal direction of the second linear elements and in the arrangement direction of the second linear elements.
  • the second unit element had a side wall facing the longitudinal direction of the second linear element and a side wall facing the arrangement direction of the second linear element.
  • the manufacturing method described with reference to FIGS. 14 to 16 was adopted for manufacturing the decorative sheet laminate.
  • the linear pattern layer was produced using an ultraviolet curable resin.
  • the joining layer was produced using a thermoplastic resin.
  • the design layer was produced by printing.
  • the design layer was a uniform black layer.
  • the produced linear pattern layer had the structure described above. That is, the produced linear pattern layer contained a plurality of linear elements. Each linear element was a linear protrusion or a linear depression. Each linear element contained a two-dimensional array of unit elements. A unit element was a unit convex portion or a unit concave portion. The unit elements were arranged in the longitudinal direction of the linear elements and in the arrangement direction of the linear elements.
  • the unit element had a side wall facing the longitudinal direction of the linear elements and a side wall facing the arrangement direction of the linear elements.
  • the arrangement ratio of unit recesses was different between two linear elements adjacent to each other in the arrangement direction.
  • the average height was different between two linear elements adjacent to each other in the array direction.
  • the maximum length of the unit element of the linear pattern layer was about 50 ⁇ m.
  • the height difference of the concave-convex structure of the unit element of the linear pattern layer was about 3 ⁇ m.
  • Example 2 The manufacturing method of the decorative sheet according to Example 2 is different from that of Example 1 except that the metal plate having the recesses formed therein is blasted when the plate is produced, and the metal plate after blasting is chromium plated. It was different from the manufacturing method of the decorative sheet. Except for the blasting treatment, the decorative sheet according to Example 2 employs the same manufacturing method and manufacturing conditions as those of the decorative sheet according to Example 1. In Example 2, fine irregularities due to blasting were formed on the plate surface of the plate, the irregular structure of the resin imprinting layer, and the irregular structure of the linear pattern layer.
  • Example 3 The manufacturing method of the decorative sheet according to Example 3 was different from the manufacturing method of the decorative sheet according to Example 2 only in the blasting conditions.
  • the method for manufacturing the decorative sheet according to Example 3 was the same as the method for manufacturing the decorative sheet according to Example 2, except for the blasting conditions.
  • the blasting conditions employed in Example 3 were more severe than the blasting conditions employed in Example 2.
  • Comparative Example 1 In Comparative Example 1, instead of the laminate of the substrate and the resin imprinting layer, a resin film whose surface was scratched with sandpaper was prepared. The resin film was produced by scribing the surface of a polyethylene terephthalate film having a thickness of 50 ⁇ m. A linear pattern layer, a bonding layer and a design layer were formed on the resin film to obtain a decorative sheet laminate.
  • the method for producing the linear pattern layer, the bonding layer, and the design layer includes the method, method, conditions, and materials for producing the linear pattern layer, the bonding layer, and the design layer on the resin molding layer in Example 1. assumed to be the same.
  • a decorative sheet according to Comparative Example 1 was obtained by peeling off the resin film from the decorative sheet laminate.
  • the linear pattern layer of the decorative sheet of Comparative Example 1 had a plurality of linear elements.
  • the length along the longitudinal direction of the linear element was approximately the same as the length along the longitudinal direction of the linear element forming the hairline pattern to be manufactured shown in FIG.
  • the width along the arrangement direction of the linear elements was approximately the same as the width along the arrangement direction of the linear elements forming the hairline pattern to be manufactured shown in FIG.
  • the decorative sheet manufacturing method according to Comparative Example 2 differs from the decorative sheet manufacturing method according to Example 1 only in that the image data shown in FIG. 10 is binarized.
  • the plate line-shaped elements of the plate are plate line-shaped convex portions having a substantially constant height, or plate line-shaped concave portions having a substantially constant height. became. That is, the plate linear elements did not contain two-dimensionally arranged plate unit elements.
  • the resin-imparted layer had a plurality of second linear elements with substantially constant heights.
  • the second linear elements did not include second unit elements arranged two-dimensionally.
  • the linear pattern layer had a plurality of linear elements with substantially constant heights.
  • the linear elements did not contain two-dimensionally arranged unit elements.
  • the length of the linear element along the longitudinal direction was approximately the same as the length along the longitudinal direction of the linear element forming the hairline pattern to be manufactured shown in FIG.
  • the width along the arrangement direction of the linear elements was approximately the same as the width along the arrangement direction of the linear elements forming the hairline pattern to be manufactured shown in FIG.
  • a display system shown in FIG. 25 was produced by combining the decorative sheets according to Examples 1 to 3 and Comparative Examples 1 and 2 with a display device having a light shielding pattern sheet and a light source device.
  • the light source device was a light emitting diode.
  • the display device was capable of displaying square-shaped images. The sides of the square formed by the image extended in the longitudinal direction and the arrangement direction of the linear elements. It was confirmed whether or not bleeding on the decorative sheet was observed in a state in which the display device was operated to display an image.
  • the evaluation results are shown in the column of “Evaluation 3 (Bleeding)” in Table 1. An example in which no conspicuous bleeding was observed and a sharp image was observed was given "A". "B" was assigned to examples in which bleeding was observed and the image was observed to be blurred.
  • the second embodiment differs from the first embodiment in the configuration of the linear elements 45 included in the linear pattern layer 40 .
  • the second embodiment may be configured similarly to the first embodiment except for the configuration of the linear element 45.
  • FIG. In the description and accompanying drawings of the second embodiment, the same reference numerals as those of the corresponding components of the first embodiment are used.
  • the display system 10 includes a decorative member 20 or a decorative sheet 30, a light source device 12 or a display device 16, may include
  • the light source device 12 and the display device 16 in the second embodiment may be the same as the light source device 12 and the display device 16 described in the first embodiment, respectively.
  • the light source device 12 and the display device 16 are at least partially covered with the decorative member 20 and the decorative sheet 30 from the third direction D3. According to the display system 10 , the light source device 12 and the display device 16 can be installed while ensuring harmony with the surroundings by the decorative sheet 30 .
  • the display system 10 when the light source device 12 and the display device 16 are turned on, the display system 10 can display as shown in FIG. As described in the first embodiment, when the light source device 12 and the display device 16 are turned on, the display system 10 can display the linear pattern 35 by the linear pattern layer 40 as shown in FIG. As described in the first embodiment with reference to FIGS. 3 to 5D, the linear pattern layer 40 of the decorative member 20 or the decorative sheet 30 according to the second embodiment includes hairline patterns, spin patterns, , grain pattern, or weave pattern.
  • the display system 10, the decorative member 20, or the decorative sheet 30 according to the second embodiment can be applied to various uses as described in the first embodiment.
  • the decorative member 20 may include the decorative sheet 30 and the thermoplastic resin portion 64.
  • the thermoplastic resin portion 64 described in the first embodiment may be used as the thermoplastic resin portion 64 .
  • the decorative member 20 may include components other than the decorative sheet 30 and the thermoplastic resin portion 64, as in the first embodiment.
  • the decorative member 20 and the decorative sheet 30 include a linear pattern layer 40, a bonding layer 62, a design One or more of the layer 60, the light-shielding pattern sheet 66, and the surface protective layer may be included.
  • the bonding layer 62, the design layer 60, the light-shielding pattern sheet 66, and the surface protective layer in the second embodiment may each have the configuration described in the first embodiment.
  • the decorative member 20 and the decorative sheet 30 in the second embodiment may have the transmission properties described in the first embodiment.
  • the decorative member 20 and the decorative sheet 30 in the second embodiment may have dimensions such as thickness and size described in the first embodiment.
  • the decorative member 20 and the decorative sheet 30 in the second embodiment may have the optical properties described in the first embodiment.
  • the total light transmittance of the decorating member 20 and the decorating sheet 30 may be the same as the total light transmittance of the decorating member 20 and the decorating sheet 30 according to the first embodiment.
  • the decorative sheet 30 includes the light shielding pattern sheet 66, the total light transmittance is the total light transmittance measured in the transmission region 66b.
  • the decorative sheet 30 includes a linear pattern layer 40.
  • the linear pattern layer 40 displays the linear pattern 35 .
  • the linear pattern 35 is a linear pattern.
  • Linear pattern layer 40 includes a plurality of linear elements 45 .
  • a plurality of linear elements 45 are arranged in one direction. One direction is the arrangement direction of the linear elements 45 .
  • Each linear element 45 extends in the other direction that intersects with one direction, for example, the other direction that intersects perpendicularly.
  • Each linear element 45 has a longitudinal direction, the other direction being the longitudinal direction.
  • Each linear element 45 elongates in the other longitudinal direction.
  • a plurality of linear elements 45 extend generally parallel.
  • a linear pattern 35 is represented by a set of a plurality of linear elements 45 .
  • the linear element 45 extending in a predetermined direction means that the linear element 45 extends in a predetermined direction (another direction) at any position along its entire length in a strict sense. do not.
  • the angle formed by the extending direction at each position of the linear element 45 with respect to a predetermined direction (other direction) is preferably ⁇ 15° or less, more preferably ⁇ 10° or less, It is more preferable that the angle is ⁇ 5° or less.
  • the angle formed by the direction connecting both ends of the linear elements 45 with respect to the predetermined direction (another direction) is ⁇ 10° or less. ⁇ 5° or less is more preferable, and ⁇ 3° or less is even more preferable.
  • That the linear elements 45 are elongated means that the ratio of the total length to the width of the linear elements 45 is 2 or more, preferably 10 or more, more preferably 20 or more.
  • the total length of the linear element 45 is the length ( ⁇ m) along the longitudinal direction (other direction) of the linear element 45 .
  • the width of the linear elements 45 is the length ( ⁇ m) along the direction of arrangement of the linear elements 45 (the one direction 9).
  • the length along the longitudinal direction (other direction) of the linear element 45 may be the same as the length described in the first embodiment.
  • the width along the arrangement direction (one direction) of the linear elements 45 may be the same as the width described in the first embodiment.
  • Each linear element 45 is a linear protrusion 45A or a linear recess 45B.
  • the linear protrusions 45A and the linear recesses 45B are alternately arranged in the arrangement direction (the second direction D2 in the illustrated example).
  • the average position (average height) of the linear elements 45 in the normal direction of the decorative sheet 30 the third direction D3 in the illustrated example
  • two linear elements 45 adjacent in the arrangement direction are: They are identified as linear protrusions 45A or linear recesses 45B.
  • a reference position (reference height) in the normal direction of the decorative sheet 30 is set, and the linear protrusions 45A and the linear recesses 45B are distinguished based on the reference height.
  • Linear elements 45 whose average position (average height) is closer to the observer than the reference position in the normal direction of the decorative sheet 30 are linear projections 45A.
  • Linear elements 45 whose average position (average height) is lower than the reference position in the normal direction of the decorative sheet 30 and which are farther from the observer are linear concave portions 45B.
  • the reference position is the average position (average height) of the linear pattern layer 40 in the normal direction of the decorative sheet 30 .
  • the average position (average height) of the linear pattern layer 40 in the normal direction of the decorative sheet 30 is specified by the method described in the first embodiment.
  • the average position (average height) of the linear elements 45 in the normal direction of the decorative sheet 30 is specified by the method described in the first embodiment.
  • the linear pattern layer 40 includes a sheet-like base portion 43 and linear protrusions 45A projecting from the base portion 43 in the third direction D3.
  • the base portion 43 is exposed by providing the linear concave portion 45B between the two linear convex portions 45A adjacent to each other in the second direction D2.
  • the base portion 43 and the linear convex portion 45A may be integrally molded by resin molding. That is, the base portion 43 and the linear convex portion 45A may be seamlessly connected.
  • an upper limit may be set for Rz along one direction, which is the arrangement direction of the linear elements 45 .
  • Rz is the ten-point average roughness ( ⁇ m) according to JISB0601-1994.
  • Rz along one direction in which the linear elements 45 are arranged may be 3.2 ⁇ m or less, 2.5 ⁇ m or less, or 2.4 ⁇ m or less.
  • an upper limit may be set for Ra along one direction, which is the arrangement direction of the linear elements 45 .
  • Ra is the arithmetic mean roughness ( ⁇ m) conforming to JISB0601-1994.
  • Ra along one direction, which is the arrangement direction of the linear elements 45 may be 1.4 ⁇ m or less, 1.1 ⁇ m or less, or 0.9 ⁇ m or less.
  • an upper limit may be set for the PV along one direction, which is the arrangement direction of the linear elements 45 .
  • PV is the maximum valley depth ( ⁇ m) conforming to JISB0601-1994.
  • the PV along one direction in which the linear elements 45 are arranged may be 4.7 ⁇ m or less, 3.9 ⁇ m or less, or 3.8 ⁇ m or less.
  • an upper limit may be set for rms along one direction, which is the arrangement direction of the linear elements 45 .
  • rms is the root mean square roughness ( ⁇ m) according to JISB0601-1994.
  • the rms along one direction, which is the arrangement direction of the linear elements 45 may be 1.5 ⁇ m or less, 1.2 m or less, or 1.1 ⁇ m or less.
  • the side walls 42 formed by the linear elements 45 have a height along the normal direction of the decorative sheet 30 (the third direction D3 in the illustrated example). height tends to be low. A low side wall 42 along the normal direction of the decorative sheet 30 is less likely to exhibit a strong lens effect. Further, the linear element 45 tends to have the side wall 42 greatly inclined with respect to the normal direction of the decorative sheet 30 (the third direction D3 in the illustrated example). Side walls 42 that are greatly inclined with respect to the normal direction of the decorative sheet 30 are less likely to exhibit a lens effect of concentrating light in a direction inclined with respect to the normal direction. By weakening the lens effect of the side walls 42 in this way, the spread of light around the area where the image should be displayed is suppressed. It is presumed that this suppresses blurring of the contour of the image.
  • 31A and 31B show specific examples of the linear pattern layer 40 having such surface properties.
  • 31A and 31B both show the linear pattern layer 40 on the main cut surface of the decorative sheet 30.
  • FIG. 31A the linear element 45 of the linear pattern layer 40 has a shape obtained by chamfering linear protrusions 45A and linear recesses 45B having rectangular cross sections indicated by dotted lines.
  • the linear elements 45 of the linear pattern layer 40 shown in FIG. 31A are gently curved linear protrusions 45A or linear recesses 45B.
  • the linear pattern layer 40 shown in FIG. 31A can be produced by forming a coating film of a resin composition on a plate surface (mold surface) of a plate (mold) used for resin shaping.
  • a coating layer 72 of a resin composition on the concave-convex structure 81 of a resin molding layer 80 as a plate (mold) used for resin molding, the linear shape shown in FIG. 31A is obtained.
  • a patterned layer 40 may be produced.
  • linear protrusions 45A and linear recesses 45B having rectangular cross sections indicated by dotted lines are smoothly formed. It has a shape. Furthermore, the linear pattern layer 40 shown in FIG. 31B has fine unevenness on the surface. The pitch of fine unevenness is shorter than the arrangement pitch of the linear elements 45 . The fine unevenness is arranged in the arrangement direction of the linear elements 45 (the second direction D2 in the illustrated example). The fine unevenness may also be arranged in the longitudinal direction of the linear element 45 (in the illustrated example, the first direction D1). The height difference of the fine unevenness is smaller than the height difference of the linear elements 45 .
  • the linear pattern layer 40 shown in FIG. 31B can be produced by resin shaping using a plate (mold) whose plate surface (mold surface) has been blasted.
  • a lower limit may be set for Rz along one direction, which is the direction in which the linear elements 45 are arranged.
  • Rz is the ten-point average roughness ( ⁇ m) conforming to JISB0601-1994, as described above.
  • Rz along one direction, which is the arrangement direction of the linear elements 45 may be 0.5 ⁇ m or more, or may be 1.2 ⁇ m or more.
  • a lower limit may be set for Ra along one direction in which the linear elements 45 are arranged.
  • Roughness Ra is the arithmetic mean roughness ( ⁇ m) conforming to JISB0601-1994, as described above.
  • Ra along one direction, which is the arrangement direction of the linear elements 45, may be 0.2 ⁇ m or more, or may be 0.6 ⁇ m or more.
  • a lower limit may be set for the PV along one direction, which is the arrangement direction of the linear elements 45.
  • PV is the maximum valley depth ( ⁇ m) conforming to JISB0601-1994, as described above.
  • PV along one direction, which is the arrangement direction of the linear elements 45 may be 0.9 ⁇ m or more, or may be 2.2 ⁇ m or more.
  • a lower limit may be set for the rms along one direction, which is the arrangement direction of the linear elements 45.
  • rms is the root-mean-square roughness ( ⁇ m) according to JISB0601-1994, as described above.
  • the rms along one direction, which is the arrangement direction of the linear elements 45 may be 0.2 ⁇ m or more, or may be 0.6 ⁇ m or more.
  • a lower limit may be set for the side wall inclination angle ⁇ from the viewpoint of suppressing blurring of the contour of the image.
  • the sidewall inclination angle ⁇ is an index representing the inclination angle of the sidewalls 42 positioned between the linear protrusions 45A and the linear recesses 45B adjacent to each other in the arrangement direction of the linear elements 45 with respect to the normal direction.
  • the lens effect of the side wall 42 can be weakened, and the light guiding action of the linear element 45 can be weakened.
  • the sidewall inclination angle ⁇ may be 66° or more, 73° or more, or 76° or more.
  • an upper limit may be set for the side wall inclination angle ⁇ .
  • the sidewall inclination angle ⁇ may be 87° or less.
  • the side wall inclination angle ⁇ is determined by a straight line SL passing through a first position P1 and a second position P2 on the linear pattern layer 40 on the main cut surface of the decorative sheet 30, is the angle (°) between the normal direction D3 and
  • the sidewall inclination angle ⁇ is 0° or more and 90° or less.
  • the main cutting plane of the decorative sheet 30 is a cross section along both the normal direction of the decorative sheet and one direction in which the linear elements 45 are arranged.
  • the first position P1 is the highest by 10% of the height difference HD between the highest position HP of the linear protrusion 45A crossed by the main cutting plane and the lowest position LP of the linear recess 45B adjacent to the linear protrusion 45A. It is a position on the linear pattern layer 40 lower than the position HP.
  • the second position P2 is a position on the linear pattern layer 40 higher than the lowest position LP by 10% of the height difference HD.
  • the first position P1 is positioned between the highest position HP and the lowest position LP in one direction, which is the direction in which the linear elements 45 are arranged.
  • a plurality of positions lower than the highest position HP by 10% of the height difference HD may exist between the highest position HP and the lowest position LP in the arrangement direction of the linear elements 45 .
  • the position closest to the lowest position LP in the arrangement direction of the linear elements 45 is the first position P1.
  • the second position P2 is located between the highest position HP and the lowest position LP in one direction, which is the arrangement direction of the linear elements 45 .
  • a plurality of positions higher than the lowest position LP by 10% of the height difference HD can exist between the highest position HP and the lowest position LP in the arrangement direction of the linear elements 45 .
  • the position closest to the highest position HP in the arrangement direction of the linear elements 45 is the second position P2.
  • Rz, Ra, PV, rms, and side wall inclination angle ⁇ which serve as indicators of the surface properties of the linear pattern layer 40, are obtained by dividing each side of a square region having a side length of 1076 ⁇ m in the linear pattern layer 40 to be measured. It is divided into three equal parts and partitioned into nine small areas, and is specified as the average value of a total of nine measured values measured at approximately the center of each small area.
  • Rz, Ra, PV, and rms are values measured using a scanning white light interferometer (NewView6300) manufactured by Zygo Corporation. The measurement area in this measuring device is 1076 ⁇ m square, and the “cylinder” set in the measuring device is used to remove the waviness component.
  • the sidewall inclination angle ⁇ is calculated from the surface shape of the linear pattern layer 40 measured using a scanning white light interferometer (New View 6300) manufactured by Zygo Corporation.
  • the decorative sheet 30 may include a bonding layer 62 for the purpose of improving adhesion between constituent elements.
  • the bonding layer 62 improves adhesion between the linear pattern layer 40 and the design layer 60 .
  • the bonding layer 62 can be formed using various adhesives and adhesives such as acrylic resin and epoxy resin.
  • the thickness of the bonding layer 62 may be, for example, 1 ⁇ m or more and 80 ⁇ m or less.
  • the bonding layer 62 may be omitted.
  • the decorative sheet 30 in the second embodiment may include layers other than the linear pattern layer, like the decorative sheet 30 in the first embodiment.
  • the decorative sheet 30 may include a design layer 60 for the purpose of improving designability.
  • the design layer 60 in the second embodiment may be the same as the design layer 60 described in the first embodiment.
  • the decorative sheet 30 may include the bonding layer 62 described in the first embodiment.
  • FIG. 32 shows an example of the plate 90.
  • Plate 90 may be the roll plate shown in FIG.
  • the plate 90 has a cylindrical outer shape.
  • the plate 90 is held rotatably around the cylindrical central axis CA.
  • the plate 90 has a plate surface 91 on its cylindrical outer peripheral surface.
  • the plate surface 91 is an uneven surface corresponding to the linear pattern to be transferred.
  • the plate surface 91 is an uneven surface corresponding to the uneven structure 41 of the linear pattern layer 40 displaying the linear pattern 35 .
  • the plate surface 91 of the plate 90 includes a plurality of plate linear elements 92 arranged in an axial direction parallel to the central axis CA.
  • Each plate-like element 92 is a plate-like protrusion 92A or a plate-like recess 92B.
  • the plate line-shaped convex portion 92A protrudes outward away from the central axis CA in the radial direction perpendicular to the central axis CA.
  • the stencil-shaped concave portion 92B is recessed inward and close to the central axis CA in the radial direction perpendicular to the central axis CA.
  • the plate linear projections 92A and the plate linear recesses 92B are alternately arranged in the axial direction.
  • the plate-like elements 92 are elongated in the circumferential direction about the central axis CA.
  • the plate surface 91 of the plate 90 is manufactured according to the linear pattern 35 to be manufactured.
  • the plate 90 may be produced by the following method using image data.
  • image data 95 regarding the linear pattern 35 is prepared.
  • FIG. 10 shows an example of the image data 95.
  • the image data 95 may be multi-tone grayscale image data.
  • Multi-gradation grayscale image data is data of three or more gradations.
  • the image data 95 can be prepared by scanning the linear pattern 35 to be manufactured in grayscale.
  • the image data 95 may be binarized image data.
  • the image data 95 shown in FIG. 10 is data relating to the hairline pattern. Depending on the gradation of each pixel of the image data 95, the height of the area of the plate 90 corresponding to that pixel is determined. As a result, the area coextensive with the image data 95 of the linear pattern 35 can be divided into small areas, and height information can be assigned to the small areas.
  • the plate 90 can be produced by realizing the height distribution assigned to the area coextensive with the image data 95 .
  • Height distribution can be achieved by forming recesses in the metal plate.
  • the height distribution may be imparted to the metal plate by etching the surface of the metal plate.
  • the height distribution may be formed in the metal plate by forming recesses by etching using a photolithographic technique.
  • the formed recesses constitute each plate linear element 92 of the plate surface 91 .
  • the height distribution may be imparted to the metal plate by laser writing the surface of the metal plate.
  • the metal plate forming the printing plate 91 may be a copper plate. By attaching a metal plate such as a copper plate to the outer peripheral surface of the cylindrical core, the metal plate constitutes the plate surface 91 .
  • the surface of the copper plate may be chrome plated after the formation of the uneven surface is completed.
  • the blasting treatment is performed before the chrome plating treatment described above.
  • the pitch of the fine unevenness provided on the plate surface 91 may be shorter than the arrangement pitch of the plate-unit elements 93 .
  • the height difference of the fine unevenness imparted to the plate surface 91 may be smaller than the height difference of the plate linear elements 92 .
  • the degree of fine unevenness can be adjusted by the type, size, and shape of the abrasive used in the blasting process, the ejection conditions of the abrasive, and the like.
  • fine unevenness By imparting fine unevenness to the plate surface 91, fine unevenness can be imparted to the surface of the linear element 45 as shown in FIG. 31B. As will be described later, the fine unevenness of the linear elements 45 can weaken the lens effect and light guiding action of the linear elements 45 .
  • the plate 90 is produced as described above. Next, using the produced plate 90, the decorative sheet 30 is produced.
  • the plate 90 is used to fabricate the resin imprint layer 80 .
  • An uneven structure 81 obtained by transferring the unevenness of the plate surface 91 is provided to the resin imprinting layer 80 .
  • Concavo-convex structure 81 has a configuration complementary to plate surface 91 .
  • the resin transfer layer 80 may be produced using the plate 90 as follows.
  • the plate 90 is rotated around the central axis CA.
  • a long base material 70 is supplied toward the plate 90 .
  • an uncured curable resin composition is supplied between the substrate 70 and the plate 90 .
  • a resin film such as a polyethylene terephthalate film may be used.
  • an ionizing radiation curable resin composition is exemplified.
  • an ionizing radiation curable resin composition an ultraviolet curable resin composition is exemplified.
  • the curable resin composition is cured between the plate 90 and the substrate 70 .
  • the ultraviolet curable resin composition is irradiated with ultraviolet rays that have passed through the base material 70 .
  • a resin transfer layer 80 is produced from the cured product of the curable resin composition.
  • the resin imprinting layer 80 is bonded to the base material 70 .
  • the resin imprint layer 80 includes a plurality of second linear elements 82 corresponding to the plate linear elements 92 .
  • the second linear elements 82 are formed corresponding to the plate linear elements 92 .
  • the plurality of second linear elements 82 are arranged in one direction.
  • Each second linear element 82 elongates in the other direction orthogonal to the one direction.
  • the second linear element 82 is a second linear protrusion 82A or a second linear recess 82B.
  • a second linear concave portion 82B is formed corresponding to the plate linear convex portion 92A.
  • a second linear protrusion 82A is formed corresponding to the plate linear recess 92B.
  • the second linear protrusions 82A and the second linear recesses 82B are alternately arranged in one direction.
  • the base material 70 is separated from the plate surface 91 of the plate 90.
  • the resin imprint layer 80 includes a sheet-like land portion 84 bonded to the base material 70 .
  • the land portion 84 is formed integrally with the second linear convex portion 82A.
  • the land portion 84 is exposed between the two second linear convex portions 82A at the position where the second linear concave portion 82B is provided.
  • the first resin composition is supplied to the surface of the resin transfer layer 80 peeled off from the plate 90 that was in contact with the plate 90 to form a coating film of the first resin composition. do.
  • the coating layer 72 is formed by drying or curing the coating film of the first resin composition. Concavities and convexities corresponding to the concavo-convex structure 81 of the resin imprinting layer 80 remain on the surface of the coating layer 72 .
  • the coating layer 72 may contain a thermoplastic resin.
  • the coating layer 72 may contain a cured product of a curable resin composition.
  • the curable resin composition may be a thermosetting resin composition or an ionizing radiation curable resin composition.
  • the coating layer 72 may contain a material having releasability such as silicone.
  • the coating layer 72 functions as a release layer 73 by containing the peelable material. However, the production of the coating layer 72 may be omitted and the linear pattern layer 40 may be formed on the resin imprinting layer 80 .
  • the structure 41 can be smoothed.
  • the smoothness of the uneven structure 41 can be adjusted by the thickness of the coating layer 72, the viscosity of the first resin composition, the drying speed, the curing speed, and the like.
  • the thickness of the coating layer 72 may be 10% or more, 20% or more, 30% or more, or 40% or more of the height difference HD of the uneven structure 81 of the resin molding layer 80 .
  • a second resin composition is supplied onto the resin imprinting layer 80 and the coating layer 72 to form a coating film of the second resin composition.
  • the second resin composition may be a curable resin composition.
  • the curable resin composition may be a thermosetting resin composition or an ionizing radiation curable resin composition.
  • an ionizing radiation curable resin composition an ultraviolet curable resin composition is exemplified.
  • the curable resin composition is cured on the resin transfer layer 80 and the coating layer 72 .
  • the linear pattern layer 40 is produced from the cured product of the curable resin composition.
  • the curing treatment of the curable resin composition at this timing may be complete curing or semi-curing.
  • the produced linear pattern layer 40 is bonded to the resin imprinting layer 80 or the coating layer 72 .
  • the second resin composition may be the same as the second resin composition described in the first embodiment.
  • the second resin composition may contain an electron beam-curable resin composition and at least one of an ultraviolet absorber and a light stabilizer.
  • a concave-convex structure 41 corresponding to the concave-convex structure 81 of the resin molding layer 80 is applied to the linear pattern layer 40 .
  • Linear elements 45 of the linear pattern layer 40 are formed corresponding to the second linear elements 82 .
  • Linear recesses 45B of the linear pattern layer 40 are formed corresponding to the second linear protrusions 82A.
  • Linear protrusions 45A of the linear pattern layer 40 are formed corresponding to the second linear recesses 82B.
  • the base portion 43 is also formed by the cured product of the curable resin composition.
  • the base portion 43 is formed integrally with the linear convex portion 45A.
  • the base portion 43 is exposed between the two linear convex portions 45A at the position where the linear concave portion 45B is provided.
  • a bonding layer 62 is formed over the linear pattern layer 40 .
  • the bonding layer 62 may be produced by supplying a resin composition onto the linear pattern layer 40 to form a coating film of the resin composition, and drying or curing the coating film.
  • the design layer 60 is formed over the joining layer 62 .
  • the design layer 60 may be formed by gravure printing.
  • the decorative sheet 30 is formed over the resin molding layer 80 .
  • the decorative sheet 30 is bonded to the resin molding layer 80 and the coating layer 72 .
  • the decorative sheet 30 constitutes the decorative sheet laminate 25 together with the resin imprint layer 80 .
  • the decorative sheet laminate 25 includes the decorative sheet 30, the coating layer 72, the resin molding layer 80 and the substrate 70 in order in the third direction D3.
  • the decorative member 20 is produced using the decorative sheet 30 .
  • An injection molding device 110 is prepared as shown in FIG.
  • Injection molding apparatus 110 includes mold 111 .
  • Mold 111 includes a first mold 111A and a second mold 111B.
  • the first mold 111A and the second mold 111B can be separated from each other as shown in FIG. 37 and can be close to each other as shown in FIG.
  • a cavity 112 is formed between the first die 111A and the second die 111B in the closed state in which the first die 111A and the second die 111B are in contact with each other.
  • Mold 111 has a gate 113 leading to cavity 112 .
  • the gate 113 is connected to a supply device for the injection resin 114 (not shown).
  • An injection resin 114 is supplied into the cavity 112 through the gate 113 .
  • the first mold 111A and the second mold 111B are heated by a heater (not shown) and maintained at a high temperature.
  • the decorative sheet laminate 25 is accommodated in the cavity 112 within the molding die 111 .
  • the decorative sheet laminate 25 is arranged in the second mold 111B such that the decorative sheet 30 is exposed in the cavity 112.
  • molten injection resin 114 is injected into cavity 112 through gate 113 .
  • the injected resin 114 is cooled in the cavity 112, welded to the decorative sheet 30 and solidified.
  • the thermoplastic resin portion 64 joined to the decorative sheet 30 is obtained from the solidified injected resin 114 .
  • the material of the thermoplastic resin portion 64 is as described above.
  • the first die 111A and the second die 111B are separated from each other.
  • the thermoplastic resin portion 64 is joined to the first mold 111A.
  • the base material 70 may be fixed to the second mold 111B.
  • the base material 70 and the resin transfer layer 80 are separated from the decorative sheet 30 as the first mold 111A and the second mold 111B are separated. . Peeling is promoted by the coating layer 72 functioning as a release layer 73 .
  • the decorative sheet 30 and the decorative member 20 are manufactured.
  • the linear pattern layer 40 may be hardened on the decorative member 20 removed from the mold 111 .
  • the linear pattern layer 40 may be cured.
  • the pattern laminate 26 may be formed on the decorative sheet laminate 25.
  • the configuration such as the dimensions of the recess 27 that can form the recess 27 in the decorative member 20 may be the same as the configuration such as the dimension described in the first embodiment.
  • the linear pattern layer 40 displays the linear pattern 35 .
  • the linear pattern may be a hairline pattern, a spin pattern, a wood grain pattern, or a woven pattern.
  • the design layer 60 and the design may be displayed.
  • the same effect as in the first embodiment is obtained.
  • an image having a shape corresponding to the shape of the transmissive area 66b can be displayed.
  • a display device 16 displays an image to be viewed by an observer.
  • the linear elements have steep side walls in the normal direction of the decorative sheet.
  • the outer contour of the side wall is slightly inclined and curved.
  • the sidewalls can exert a lens effect on the light emitted from the linear element through the sidewalls. It was presumed that the light emitted from the linear elements in the arrangement direction is condensed to some extent by the lens effect on the side wall, and can be observed as blurring 101 spreading in the arrangement direction of the linear elements with respect to the image 100 .
  • Each linear element includes a pair of side walls that face each other in the arrangement direction. If the sidewalls rise in the normal direction, the light traveling through the linear element can repeatedly reflect, especially total internal reflection, at the sidewalls. In this way, the image light travels through the linear element in the longitudinal direction of the linear element. It was speculated that the image light spreads along the linear element due to the light guide action in the linear element, and can be observed as blurring 101 that spreads in the longitudinal direction of the linear element with respect to the image 100 .
  • the linear pattern layer 40 includes multiple linear elements 45 .
  • the plurality of linear elements 45 are arranged in one arrangement direction (the second direction D2 in the illustrated example).
  • Each linear element 45 extends in the longitudinal direction (the first direction D1 in the illustrated example) that is the other direction orthogonal to the one direction.
  • the ten-point average roughness Rz defined in JISB0601-1994, and the ten-point average roughness Rz along the arrangement direction of the linear elements 45 may be 3.2 ⁇ m or less, or 2.5 ⁇ m or less. , 2.4 ⁇ m or less.
  • the height of the sidewalls of the linear elements 45 is restricted.
  • the sidewalls 42 tend to be greatly inclined with respect to the normal direction of the decorative sheet 30 .
  • an upper limit may be set for Rz along the arrangement direction of the linear elements 45 and an upper limit for Ra defined in JISB0601-1994. In this case, bleeding can be suppressed more effectively.
  • Ra along the arrangement direction of the linear elements 45 may be 1.4 ⁇ m or less, 1.1 ⁇ m or less, or 0.9 ⁇ m or less. Bleeding can also be suppressed by adjusting Ra together with Rz in this way.
  • An upper limit may be set for Rz along the arrangement direction of the linear elements 45 and an upper limit for PV defined in JISB0601-1994.
  • the PV along the arrangement direction of the linear elements 45 may be 4.7 ⁇ m or less, 3.9 ⁇ m or less, or 3.8 ⁇ m or less. Bleeding can also be suppressed by adjusting PV together with Rz in this way.
  • An upper limit may be set for Rz along the arrangement direction of the linear elements 45, and an upper limit may be set for rms defined in JISB0601-1994.
  • the rms along the arrangement direction of the linear elements 45 may be 1.5 ⁇ m or less, 1.2 m or less, or 1.1 ⁇ m or less. Bleeding can also be suppressed by adjusting rms together with Rz in this way.
  • the linear pattern layer 40 includes a plurality of linear elements 45.
  • the plurality of linear elements 45 are arranged in one arrangement direction (the second direction D2 in the illustrated example). Each linear element 45 extends in the longitudinal direction (the first direction D1 in the illustrated example) that is the other direction orthogonal to the one direction.
  • the plurality of linear elements 45 includes linear protrusions 45A and linear recesses 45B alternately arranged in the arrangement direction.
  • a side wall inclination angle ⁇ specified by a main cutting plane crossing linear protrusions 45A and linear recesses 45B adjacent to each other in the arrangement direction may be 66° or more, 73° or more, or 76° or more.
  • the side wall inclination angle ⁇ is determined by a straight line SL passing through a first position P1 and a second position P2 on the linear pattern layer 40 on the main cut surface of the decorative sheet 30, is the angle (°) between the normal direction D3 and
  • the sidewall inclination angle ⁇ is 0° or more and 90° or less.
  • the main cutting plane of the decorative sheet 30 is a cross section along both the normal direction of the decorative sheet and the arrangement direction of the linear elements 45 .
  • the first position P1 is the highest by 10% of the height difference HD between the highest position HP of the linear protrusion 45A crossed by the main cutting plane and the lowest position LP of the linear recess 45B adjacent to the linear protrusion 45A. It is a position on the linear pattern layer 40 lower than the position HP.
  • the second position P2 is a position on the linear pattern layer 40 higher than the lowest position LP by 10% of the height difference HD.
  • the first position P1 is positioned between the highest position HP and the lowest position LP in one direction, which is the direction in which the linear elements 45 are arranged.
  • a plurality of positions lower than the highest position HP by 10% of the height difference HD may exist between the highest position HP and the lowest position LP in the arrangement direction of the linear elements 45 .
  • the position closest to the lowest position LP in the arrangement direction of the linear elements 45 is the first position P1.
  • the second position P2 is located between the highest position HP and the lowest position LP in one direction, which is the arrangement direction of the linear elements 45 .
  • a plurality of positions higher than the lowest position LP by 10% of the height difference HD can exist between the highest position HP and the lowest position LP in the arrangement direction of the linear elements 45 .
  • the position closest to the highest position HP in the arrangement direction of the linear elements 45 is the second position P2.
  • the sidewall inclination angle ⁇ specified in this way is 66° or more
  • the sidewall of the linear element 45 is greatly inclined with respect to the normal direction of the decorative member 20 .
  • the side wall inclination angle ⁇ is 66° or more
  • the height of the side wall 42 along the normal direction of the decorative sheet 30 can be reduced.
  • the decorative sheet 30 according to the second embodiment blurring of the outline of the image can be suppressed in the operating state of the light source device 12 or the display device 16 .
  • the outline of the image becomes clear, and blurring of the outline of the image can be suppressed.
  • Display system 10 is capable of displaying sharp images.
  • fine unevenness may be formed on the surface of the linear pattern layer 40 as shown in FIG. 31B.
  • FIG. 31B by providing fine unevenness to the surface of the linear element 45, the lens effect and light guiding action of the linear element can be effectively weakened.
  • a lower limit may be set for the height of the sidewalls of the linear elements 45.
  • the Rz defined in JISB0601-1994 along the arrangement direction of the linear elements 45 may be 0.5 ⁇ m or more, or may be 1.2 ⁇ m or more.
  • Ra defined in JISB0601-1994, and Ra along the arrangement direction of the linear elements 45 may be 0.2 ⁇ m or more, or 0.6 ⁇ m or more.
  • the PV defined in JISB0601-1994, and the PV along the arrangement direction of the linear elements 45 may be 0.9 ⁇ m or more, or may be 2.2 ⁇ m or more. By thus setting the lower limit of the PV, the linear pattern 35 can be displayed clearly.
  • the rms defined in JISB0601-1994 and the rms along the arrangement direction of the linear elements 45 may be 0.2 ⁇ m or more, or may be 0.6 ⁇ m or more. By setting the lower limit of rms in this way, the linear pattern 35 can be clearly displayed.
  • an upper limit may be set for the side wall inclination angle ⁇ .
  • the sidewall inclination angle ⁇ may be 87° or less.
  • the decorative sheet 30 includes the linear pattern layer 40.
  • Linear pattern layer 40 includes a plurality of linear elements 45 .
  • a plurality of linear elements 45 are arranged in one direction.
  • Each linear element 45 extends in the other direction perpendicular to the one direction.
  • the total light transmittance of the decorative sheet 30 is 5% or more and 90% or less.
  • Rz defined in JISB0601-1994, and Rz along one direction is 3.2 ⁇ m or less. According to the linear pattern layer 40 having such Rz, it is possible to suppress the light guiding action and lens effect of the linear elements 45 . It is possible to suppress blurring of the contour of the image 100 . Therefore, by using the decorative sheet 30, a sharp image can be displayed.
  • the decorative sheet 30 includes the linear pattern layer 40.
  • Linear pattern layer 40 includes a plurality of linear elements 45 .
  • a plurality of linear elements 45 are arranged in one direction. Each linear element 45 extends in the other direction perpendicular to the one direction.
  • the plurality of linear elements 45 includes linear protrusions 45A and linear recesses 45B alternately arranged in one direction.
  • the total light transmittance of the decorative sheet 30 is 5% or more and 90% or less.
  • a side wall inclination angle ⁇ specified by a main cutting plane crossing the linear convex portion 45A and the linear concave portion 45B adjacent to each other in one direction is 66° or more.
  • the linear pattern layer 40 having such a side wall inclination angle ⁇ , it is possible to suppress the light guiding action and lens effect of the linear elements 45 . It is possible to suppress blurring of the contour of the image 100 . Therefore, by using the decorative sheet 30, a sharp image can be displayed.
  • the layer structure of the decorative sheet 30 and the decorative member 20 are possible.
  • either one of the bonding layer 62 and the design layer 60 may be omitted from the decorative sheet 30 .
  • the decorative sheet 30 may include a light shielding pattern sheet 66.
  • the light shielding pattern sheet 66 may be omitted from the decorative sheet 30 and the decorative member 20.
  • the linear pattern layer 40 may include a protective layer forming the outermost surface of the decorative member 20 or the decorative sheet 30 .
  • the linear pattern layer 40 may include a concavo-convex base layer containing the plurality of linear elements described above, and a protective layer laminated on the concavo-convex base layer.
  • the protective layer may be thinly formed along the uneven surface of the uneven base layer.
  • the protective layer may be provided so as to fill the uneven surface of the uneven base layer so as to form a refractive index interface with the uneven base layer.
  • the protective layer may be a hard coat layer containing a cured product of a curable resin composition.
  • the arrangement of the components included in the decorative sheet 30 and the decorative member 20 can also be changed as appropriate.
  • the modified example described in the first embodiment may be applied to the second embodiment.
  • the arrangement of the decorative sheet 30 and the decorative member 20 and the arrangement of the components included in the decorative sheet 30 and the decorative member 20 can be changed as appropriate.
  • the decorative member 20 and the decorative sheet 30 may be arranged in the opposite direction in the third direction D3.
  • the display system 10 may be configured by stacking the decorative sheet 30 on the light source device 12 or the display device 16 .
  • the decorative member 20 and the decorative sheet 30 may have a three-dimensional shape, in other words, a three-dimensional shape.
  • the decorating member 20 having a three-dimensional shape may be produced by insert-molding the preformed decorating sheet 30 by vacuum forming, pressure forming, or the like.
  • the decorative sheet 30 may be used for in-mold molding.
  • the decorative sheet 30 may be used for TOM molding.
  • the thermoplastic resin part 64 produced by injection molding may have a three-dimensional shape, in other words, a three-dimensional shape.
  • the decorative sheet 30 may be directly manufactured from the plate 90 without forming the resin imprinting layer 80 . That is, the resin imprint layer 80 may constitute the linear pattern layer 40 .
  • a decorative sheet according to Examples 11 to 17 and a decorative sheet according to Comparative Example 11 were produced.
  • the decorative sheets according to Examples 11 to 17 and Comparative Example 11 had a design layer, a bonding layer and a linear pattern layer, like the decorative sheet shown in FIG.
  • a plate was prepared, a laminate of a base material and a resin imprinting layer was prepared using this plate, a decorative sheet laminate was prepared from this laminate, and a decorative sheet laminate was prepared from the laminate.
  • a decorative sheet was produced by peeling off the base material and the resin imprinting layer.
  • the production method described above was used to make the plate.
  • the image data was used as a common hairline pattern to be manufactured, and this hairline pattern was created by a designer.
  • the hairline pattern to be manufactured had dimensions of 100 mm ⁇ 100 mm.
  • the linear elements extended over the entire length of the hairline pattern, that is, 100 mm.
  • the width along the arrangement direction of the linear elements was about 20 ⁇ m.
  • the plates used for manufacturing the decorative sheets according to Examples 11 to 13 were subjected to blasting. Different plates with different degrees of blasting were used to manufacture the decorative sheets according to Examples 11 to 13.
  • the plates used for manufacturing the decorative sheets according to Examples 14 to 17 and Comparative Example 11 were not subjected to blasting. A common plate was used for manufacturing the decorative sheets according to Examples 14 to 17 and Comparative Example 11. Except for the blasting process, the plate manufacturing conditions were the same for the decorative sheets according to Examples 11 to 17 and Comparative Example 11.
  • the height difference of the concave-convex structure due to the plate linear elements formed on the plate surface was about 5 ⁇ m.
  • the plates used for producing the decorative sheets according to Examples 11 to 13 had a height difference of about 5 ⁇ m in the concave-convex structure due to the plate linear elements formed on the plate surface.
  • the above-described manufacturing method described with reference to FIGS. 32 and 33 was adopted for manufacturing the laminate including the base material and the resin transfer layer using a plate.
  • a polyethylene terephthalate film common to the decorative sheets according to Examples 11 to 17 and Comparative Example 11 was used as a substrate.
  • the same UV curable resin was used for the resin imprinting layers of the decorative sheets according to Examples 11 to 17 and Comparative Example 11.
  • the coating layer described with reference to FIG. 33 was not used.
  • the coating layer described with reference to FIG. 33 was used.
  • the decorative sheets according to Examples 14 to 17 differed in the thickness of the coating layer.
  • the coating layer was produced using a thermosetting resin.
  • the manufacturing method described with reference to FIGS. 34 to 36 was adopted for manufacturing the decorative sheet laminate.
  • the decorative sheets according to Examples 11 to 17 and Comparative Example 11 used the same manufacturing method and manufacturing conditions for the linear pattern layer, the bonding layer, and the design layer.
  • the linear pattern layer was produced using an ultraviolet curable resin.
  • the joining layer was produced using a thermoplastic resin.
  • the design layer was produced by printing.
  • Comparative Example 11 As described above, in Comparative Example 11, a plate was produced by the method described with reference to FIGS. After that, a decorative sheet laminate is produced by the method described with reference to FIGS. manufactured. No blasting is used in plate manufacture. No coating layer was used in the production of the decorative sheet.
  • Examples 11 to 13 The decorative sheet manufacturing methods of Examples 11 to 13 differed from the decorative sheet manufacturing method of Comparative Example 11 only in that the plate manufacturing method included blasting. Except for the blasting treatment, the decorative sheets according to Examples 11 to 13 employ the same manufacturing method and the same manufacturing conditions as the decorative sheet according to Comparative Example 11.
  • the blasting conditions were changed between the decorative sheets according to Examples 11-13.
  • the conditions for jetting glass beads and the types of glass beads differed.
  • Example 11 The degree of blasting adopted in Example 11 was evaluated as follows. The blasting treatment employed in Example 11 was performed on the surface of the same flat copper plate as the copper plate used to make the plate. The blasted copper plate was chromium plated in the same manner as the plate. An uncured ultraviolet curable resin was applied to the fine uneven surface formed by blasting the copper plate, and the coating film was cured to produce a transparent diffuser plate. The transmission haze of the transparent diffusion plate was measured. A haze meter (manufactured by Murakami Color Research Laboratory, product number: HM-150) was used to measure the transmission haze. The transmission haze of the transparent diffusion plate produced by blasting used in Example 11 was 48%.
  • Examples 14 to 17 The methods for manufacturing the decorative sheets according to Examples 14 to 17 differed from the decorative sheets according to the comparative examples only in that a coating layer was formed on the uneven surface of the resin imprinting layer before the formation of the linear pattern layer. different from the manufacturing method of The decorative sheets according to Examples 14 to 17 employ the same manufacturing method and the same manufacturing conditions as the decorative sheet according to Comparative Example 11, except for the formation of the coating layer.
  • the thickness of the coating layer was changed between the decorative sheets according to Examples 14-17.
  • the thickness of the coating layer of Example 14 was 1 ⁇ m.
  • the thickness of the coating layer of Example 15 was 2 ⁇ m.
  • the thickness of the coating layer of Example 16 was 5 ⁇ m.
  • the thickness of the coating layer of Example 17 was 10 ⁇ m.
  • the height difference of the concave-convex structure of the resin imprinting layer was 5 ⁇ m.
  • the thickness of the coating layer of Example 14 was 10% of the height difference of the uneven structure of the resin imprinting layer.
  • the thickness of the coating layer of Example 15 was 20% of the height difference of the concave-convex structure of the resin imprinting layer.
  • the thickness of the coating layer of Example 16 was 100% of the height difference of the uneven structure of the resin imprinting layer.
  • the thickness of the coating layer of Example 17 was 200% of the height difference of the uneven structure of the resin imprinting layer.
  • Each measurement result shown in Table 2 was obtained by dividing each side of a square area having a side of about 1000 ⁇ m in the decorative sheet to be measured into three equal parts and dividing each side into nine small areas. It is the average value of a total of nine measurements taken at the central position.
  • a display system shown in FIG. 43 was produced by combining the decorative sheets according to Examples 11 to 17 and Comparative Example 11 with a display device having a light shielding pattern sheet and a light source device.
  • the light source device was a light emitting diode.
  • the display device was capable of displaying square-shaped images. The sides of the square formed by the image extended in the longitudinal direction and the arrangement direction of the linear elements.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Laminated Bodies (AREA)

Abstract

La feuille décorative comprend une couche à motif linéaire. La couche de motif linéaire comprend une pluralité d'éléments linéaires. Chaque élément linéaire comprend un réseau bidimensionnel d'éléments unitaires. La transmittance de lumière totale est de 5 % à 90 %.
PCT/JP2023/007175 2022-02-25 2023-02-27 Feuille décorative, élément décoratif, système d'affichage, procédé de fabrication de plaque, procédé de fabrication de feuille décorative et procédé de fabrication d'élément décoratif WO2023163192A1 (fr)

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JP2022-028690 2022-02-25
JP2022-028686 2022-02-25
JP2022028686 2022-02-25
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11268500A (ja) * 1998-03-19 1999-10-05 Dainippon Printing Co Ltd 万線状凹凸模様を有する化粧材
JP2016068477A (ja) * 2014-09-30 2016-05-09 大日本印刷株式会社 型
JP2017026917A (ja) * 2015-07-24 2017-02-02 大日本印刷株式会社 回折光沢シート、賦型シート、及び回折光沢シートの製造方法
WO2020194784A1 (fr) * 2019-03-28 2020-10-01 パナソニックＩｐマネジメント株式会社 Dispositif d'affichage
JP2020165229A (ja) * 2019-03-29 2020-10-08 大日本印刷株式会社 化粧材

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11268500A (ja) * 1998-03-19 1999-10-05 Dainippon Printing Co Ltd 万線状凹凸模様を有する化粧材
JP2016068477A (ja) * 2014-09-30 2016-05-09 大日本印刷株式会社 型
JP2017026917A (ja) * 2015-07-24 2017-02-02 大日本印刷株式会社 回折光沢シート、賦型シート、及び回折光沢シートの製造方法
WO2020194784A1 (fr) * 2019-03-28 2020-10-01 パナソニックＩｐマネジメント株式会社 Dispositif d'affichage
JP2020165229A (ja) * 2019-03-29 2020-10-08 大日本印刷株式会社 化粧材

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