JP2017205991A - Decorative sheet and decorative article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorative sheet capable of adding a visual field angle dependency to an article.SOLUTION: A decorative sheet includes: a base material; a decorative layer laminated on the base material and including a plurality of protrusions and a metal layer arranged on the protrusions; and an adhesion layer laminated on the decorative layer. A surface of each protrusion includes: a first wall surface recognizable when the protrusion is viewed along a first direction parallel to a surface direction of the decorative sheet; and a second wall surface recognizable when the protrusion is viewed along a second direction opposite to the first direction. An area of the metal layer formed on the first wall surface of the protrusion is larger than an area of the metal layer formed on the second wall surface of the protrusion.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a decorative sheet for decorating the surface of an article. The present invention also relates to a decorative article comprising an article and a decorative sheet affixed to the article.

  Conventionally, as a method of decorating the surface of an article, a method of pasting a decoration sheet on the surface of the article is known. For example, as disclosed in Patent Document 1, the decorative sheet includes an adhesive layer in contact with an article, and a metal layer that is laminated on the adhesive layer and distributed in a predetermined pattern.

JP 2002-36429 A

  As one of the methods for improving the design of the article, there is a method of changing the appearance of the article depending on the angle at which the observer views the article, in other words, a method of giving the appearance of the article a viewing angle dependency. It is done. However, just by distributing the metal layer in a predetermined pattern as in Patent Document 1, the appearance of the article cannot be given viewing angle dependency.

  An object of this invention is to provide the decorating sheet which can solve such a subject effectively.

  The present invention is a decorative sheet, and includes a base material, a decorative layer that is laminated on the base material, and includes a plurality of convex portions and a metal layer provided on the convex portion, and the decorative layer A first wall surface that is visible when the convex portion is viewed along the first direction parallel to the surface direction of the decorative sheet; An area of the metal layer provided on the first wall surface of the convex portion, and a second wall surface visually recognized when the convex portion is viewed along the second direction opposite to the first direction. Is a decorating sheet that is larger than the area of the metal layer provided on the second wall surface of the convex portion.

  In the decorative sheet according to the present invention, the area of the metal layer provided on the second wall surface of the convex portion is less than 0.5 times the area of the metal layer provided on the first wall surface of the convex portion. It may be.

  In the decorative sheet according to the present invention, the difference in refractive index between the base material and the decorative layer and the difference in refractive index between the decorative layer and the adhesive layer are 0.05 or less. There may be.

  The present invention comprises an article and a decorative sheet affixed to the article, and the decorative sheet is laminated on the adhesive layer, the adhesive layer, a plurality of convex portions, A metal layer provided on the convex portion, and a base material laminated on the decorative layer, and the surface of the convex portion is parallel to the surface direction of the decorative sheet. A first wall surface that is visually recognized when the convex portion is viewed along one direction, and a second wall surface that is viewed when the convex portion is viewed along a second direction opposite to the first direction; And the area of the metal layer provided on the first wall surface of the convex portion is larger than the area of the metal layer provided on the second wall surface of the convex portion.

  In the decorative article according to the present invention, the area of the metal layer provided on the second wall surface of the convex portion is less than 0.5 times the area of the metal layer provided on the first wall surface of the convex portion. It may be.

  In the decorative article according to the present invention, the difference in refractive index between the base material of the decorative sheet and the decorative layer, and the refraction between the decorative layer and the adhesive layer of the decorative sheet. The difference in rate may be 0.05 or less.

  ADVANTAGE OF THE INVENTION According to this invention, the decorating sheet which can give an article viewing angle dependence can be provided.

It is a perspective view which shows the decorating sheet in embodiment of this invention. It is the longitudinal cross-sectional view which looked at the decorating sheet | seat of FIG. 1 from the II-II direction. It is a longitudinal cross-sectional view which expands and shows the decorating sheet | seat of FIG. It is a top view which shows the decorating layer of a decorating sheet. It is sectional drawing which shows the decorating article in embodiment of this invention. It is a figure explaining the effect | action of the decoration article in embodiment of this invention. It is a figure which shows the process of forming the base of a decoration layer and a pattern layer on a base material. It is a top view which shows the embossing roll shown in FIG. It is a figure which shows the process of providing a metal layer on the convex part of a decoration layer. It is a figure which shows the case where the process shown in FIG. 9 is seen along the conveyance direction of a base material. It is a figure which shows the process of providing an contact bonding layer on a decoration layer. It is a figure which shows a decorative article manufacturing apparatus. It is a top view which shows the type | mold of the decorating article manufacturing apparatus shown in FIG. It is a figure which shows the process of sticking a decorating sheet to a type | mold. It is a figure which shows the process of decompressing the space around a type | mold. It is a figure which shows the process of pressurizing the space around a board | substrate and sticking a board | substrate to a decorating sheet. It is a figure which shows the process of removing a holding | maintenance part from a board | substrate. It is a longitudinal cross-sectional view which shows the 1st modification of a decoration layer. It is a longitudinal cross-sectional view which shows the 2nd modification of a decoration layer. It is a top view which shows the 3rd modification of a decoration layer. It is a longitudinal cross-sectional view which shows one modification of a decorating sheet. It is sectional drawing which shows one modification of a type | mold. It is sectional drawing which shows the modification of a decorative article. It is a figure which shows the decorating article manufacturing apparatus used in the 1st modification of the manufacturing method of a decorating article. It is a figure which shows one process in the 1st modification of the manufacturing method of a decorative article. It is a figure which shows one process in the 1st modification of the manufacturing method of a decorative article. It is a figure which shows one process in the 1st modification of the manufacturing method of a decorative article. It is a figure which shows one process in the 1st modification of the manufacturing method of a decorative article. It is a figure which shows the decoration article manufacturing apparatus used in the 2nd modification of the manufacturing method of a decoration article. It is a figure which shows one process in the 2nd modification of the manufacturing method of a decorative article. It is a figure which shows one process in the 2nd modification of the manufacturing method of a decorative article. It is a figure which shows one process in the 2nd modification of the manufacturing method of a decorative article. It is a figure which shows one process in the 2nd modification of the manufacturing method of a decorative article. It is a figure which shows the decoration article manufacturing apparatus used in the 3rd modification of the manufacturing method of a decoration article. It is a figure which shows one process in the 3rd modification of the manufacturing method of a decorative article. It is a figure which shows one process in the 3rd modification of the manufacturing method of a decorative article. It is a figure which shows one process in the 3rd modification of the manufacturing method of a decorative article.

  An embodiment of the present invention will be described with reference to FIGS. Note that, in the drawings attached to the present specification, for convenience of illustration and understanding, the scale and vertical / horizontal dimension ratios are appropriately changed and exaggerated from those of the actual ones.

  In addition, as used in this specification, the shape and geometric conditions and the degree thereof are specified. For example, terms such as “orthogonal” and “identical”, length and angle values, and the like are bound to a strict meaning. Therefore, it should be interpreted including the extent to which similar functions can be expected.

Decoration sheet With reference to Drawing 1 thru / or Drawing 3, decoration sheet 10 in one embodiment of the present invention is explained. FIG. 1 is a perspective view showing a decorative sheet 10. FIG. 2 is a longitudinal sectional view of the decorative sheet 10 of FIG. 1 viewed from the II-II direction. FIG. 3 is an enlarged longitudinal sectional view showing the decorative sheet 10 of FIG.

  As shown in FIGS. 1 and 2, the decorative sheet 10 includes a base material 13, a decorative layer 20 laminated on the base material 13, and an adhesive layer 14 laminated on the decorative layer 20. The base material 13 constitutes the first surface 11 of the decorative sheet 10, and the adhesive layer 14 constitutes the second surface 12 of the decorative sheet 10 located on the opposite side of the first surface 11. The decorative sheet 10 is affixed to the article from the second surface 12 side.

(Base material)
The base material 13 is a member that supports other layers such as the decorative layer 20 in the manufacturing process of the decorative sheet 10. The base material 13 can function as a protective member that protects the decorative layer 20 and the like.

  As the base material 13, a film containing a thermoplastic resin is used, and a thermoplastic resin film is preferably used. In this case, the moldability of the decorative sheet 10 can be improved by heating the decorative sheet 10.

  The design of the decorative sheet 10 is expressed by the decorative layer 20. The base material 13 has transparency so that the observer can visually recognize the decorative layer 20 when the observer views the decorative sheet 10 attached to the article from the base material 13 side. “Transparency” means that the haze value measured by a haze meter is 10% or less. As the haze meter, a haze meter manufactured by Murakami Color Research Laboratory Co., Ltd. can be used. Haze is measured according to JIS7136.

  Examples of the thermoplastic resin of the substrate 13 include acrylic resins, vinyl resins such as vinyl chloride, ABS resins (acrylonitrile-styrene-butadiene copolymer), styrene resins, polycarbonate resins, or polyethylene terephthalate, moldable polyesters. Polyester resins such as resins, or polyolefin resins such as polyethylene, polypropylene, polymethylpentene, polybutene, ethylene-propylene copolymer, propylene-butene copolymer, and olefin thermoplastic elastomer are preferable.

Of the above-mentioned resins, acrylic resins, moldable polyester resins and the like are particularly preferable.
When the acrylic resin is used, the base material 13 is, for example, polymethyl (meth) acrylate, polybutyl (meth) acrylate, methyl (meth) acrylate-butyl (meth) acrylate copolymer, methyl (meth) acrylate-styrene copolymer. Includes a single or a mixture of two or more acrylic resins such as coalescence. In addition, (meth) acrylate means an acrylate or a methacrylate.
The moldable polyester resin is a polyester-based thermoplastic elastomer, amorphous polyester, or the like. The polyester-based thermoplastic elastomer is a block polymer or the like that uses an aromatic polyester having a high crystallinity and a high melting point for the hard segment, and an amorphous polyether having a glass transition temperature of −70 ° C. or less for the soft segment. The aromatic polyester having a high crystallinity and a high melting point is, for example, polybutylene terephthalate. The amorphous polyether is, for example, polytetramethylene glycol. The amorphous polyester is, for example, an ethylene glycol-1,4-cyclohexanedimethanol-terephthalic acid copolymer.

  As the base material 13, a single-layer or multilayer resin film containing the above-described resin can be used. Moreover, the base material 13 contains various additives, such as a stabilizer, a plasticizer, a coloring agent, a ultraviolet absorber, a hindered amine light stabilizer, an extender, etc. suitably for a physical property adjustment as needed. In addition, the base material 13 may be colored in the range which does not impair transparency.

  The thickness of the base material 13 is 30 micrometers or more and 300 micrometers or less, for example, More preferably, they are 50 micrometers or more and 125 micrometers or less. Moreover, the surface of the base material 13 may be constituted by a primer layer made of a corona discharge treatment layer, a plasma treatment layer, a urethane resin, or the like in order to improve the adhesion with other layers in contact with the base material 13.

(Decoration layer)
The decorative layer 20 is a layer that expresses the design of the decorative sheet 10. As illustrated in FIG. 2, the decorative layer 20 is provided on the base portion 21 located on the base material 13 side, the pattern layer 22 including a plurality of convex portions 23 provided on the base portion 21, and the convex portions 23. And a metal layer 26. The base 21 and the pattern layer 22 are integrally formed. The metal layer 26 is distributed on the convex portion 23 in a predetermined pattern that expresses the design of the decorative sheet 10.

  The convex portion 23 has, for example, a triangular cross-sectional shape that protrudes toward the second surface 12 side, that is, toward the adhesive layer 14 side. In this case, the cross-sectional shape may be an isosceles triangle as shown in FIG. 2, or may be an unequal triangle although not shown. As shown in FIG. 1, each of the plurality of convex portions 23 extends in a predetermined direction (third direction D <b> 3 shown in FIG. 1) along the surface direction of the decorative sheet 10.

  As shown in FIG. 3, the surface of the convex portion 23 includes a first wall surface 24 and a second wall surface 25. The 2nd wall surface 25 is a surface visually recognized when seeing the convex part 23 along the predetermined | prescribed 1st direction D1 parallel to the surface direction of the decorating sheet 10 among the surfaces of the convex part 23. FIG. Moreover, the 2nd wall surface 25 is a surface visually recognized when seeing the convex part 23 along the 2nd direction D2 opposite to the 1st direction D1. In the present embodiment, each of the first direction D1 and the second direction D2 is orthogonal to the third direction D3 in which the convex portion 23 extends in the surface direction of the decorative sheet 10.

  FIG. 4 is a plan view showing the decorative layer 20. As shown in FIGS. 3 and 4, the metal layer 26 is mainly provided on the first wall surface 24 of the convex portion 23. In other words, the area of the metal layer 26 provided on the first wall surface 24 of the protrusion 23 is larger than the area of the metal layer 26 provided on the second wall surface 25 of the protrusion 23. For example, the ratio of the portion of the first wall surface 24 covered with the metal layer 26 is referred to as a first area ratio, and the ratio of the portion of the second wall surface 25 covered with the metal layer 26 is referred to as a second area ratio. When referred to, the first area ratio is greater than the second area ratio. Thus, by making a difference in the area ratio of the metal layer 26 between the first wall surface 24 and the second wall surface 25, as will be described later, the appearance of the article to which the decorative sheet 10 is attached depends on the viewing angle. Can be given. Preferably, the area of the metal layer 26 provided on the second wall surface 25 is less than 0.5 times the area of the metal layer 26 provided on the first wall surface 24, more preferably 0.2 times or less. More preferably, it is 0.1 times or less. Alternatively, the second area ratio is less than 0.5 times the first area ratio, more preferably 0.2 times or less, and even more preferably 0.1 times or less.

  The area of the metal layer 26 on the first wall surface 24, the first area ratio, the area of the metal layer 26 on the second wall surface 25, and the second area ratio are, for example, the normal direction of the base material 13 of the decorative sheet 10 Based on the longitudinal cross-sectional views (for example, FIG. 2, FIG. 3 and FIG. 18, FIG. 19, FIG. 21 mentioned later) of the decorating sheet 10 obtained by cut | disconnecting the decorating sheet 10 by the predetermined cut surface parallel to the surface. Can be calculated. For example, the dimensions of the first wall surface 24 and the second wall surface 25 in the longitudinal sectional view are calculated. Further, the dimensions of the metal layer 26 on the first wall surface 24 and the dimensions of the metal layer 26 on the second wall surface 25 in the longitudinal sectional view are calculated. In the longitudinal sectional view, the dimension of the metal layer 26 on the first wall surface 24 corresponds to the area of the metal layer 26 on the first wall surface 24, and the dimension of the metal layer 26 on the second wall surface 25 is equal to the second wall surface 25. This corresponds to the area of the upper metal layer 26. Further, in the longitudinal sectional view, the first area ratio is calculated by dividing the dimension of the metal layer 26 on the first wall surface 24 by the dimension of the metal layer 26 on the first wall surface 24, and similarly, the longitudinal sectional view. The second area ratio is calculated by dividing the dimension of the metal layer 26 on the second wall surface 25 by the dimension of the metal layer 26 on the second wall surface 25. As a measuring device, Keyence digital microscope VHX-5000 can be used. In addition, based on the analysis result of the several longitudinal cross-sectional view of the decorating sheet 10 obtained by cut | disconnecting the decorating sheet 10 by the some cut surface parallel to the normal line direction of the base material 13, 1st wall surface 24 The area of the upper metal layer 26, the first area ratio, the area of the metal layer 26 on the second wall surface 25, and the second area ratio may be calculated.

  Hereinafter, the shape of the convex part 23 is demonstrated. In FIG. 3, symbol H <b> 1 represents the thickness of the base portion 21, and symbol H <b> 2 represents the thickness of the convex portion 23 of the pattern layer 22. The thickness H1 of the base portion 21 is 0.5% or more and 20% or less of the thickness H2 of the convex portion 23. Moreover, the thickness H2 of the convex part 23 is 10 micrometers or more and 30 micrometers or less, for example.

  In FIG. 3, the symbol P represents an interval between two convex portions 23 adjacent in the surface direction of the decorative sheet 10. The interval P between the convex portions 23 is, for example, 20 μm or more and 60 μm or less.

  In FIG. 3, the symbol θ <b> 1 represents an angle formed by the first wall surface 24 of the convex portion 23 with respect to the surface direction of the decorative sheet 10, and the symbol θ <b> 2 is the second wall surface 25 of the convex portion 23 of the decorative sheet 10. This represents the angle formed with respect to the surface direction. Although angle (theta) 1 and angle (theta) 2 are defined based on the viewing angle dependence calculated | required with respect to the decorating sheet 10, they are 30 degrees or more and 60 degrees or less, for example. The angle θ1 and the angle θ2 may be the same or different.

  The thickness H2 of the convex portion 23 with respect to the interval P between the convex portions 23 is, for example, not less than 28% and not more than 87%.

  Hereinafter, the material which comprises each member of the decoration layer 20 is demonstrated.

  As a material constituting the base 21 and the pattern layer 22, a resin such as an ionizing radiation curable resin, a thermosetting resin, a thermoplastic resin, and the like is used. Among these, ionizing radiation curable resins are preferably used. The base 21 and the pattern layer 22 are formed, for example, by applying an ink composition containing an ionizing radiation curable resin and a polyfunctional isocyanate to the substrate 13.

  An ionizing radiation curable resin is crosslinked by being excited by irradiation with an energy quantum capable of crosslinking and polymerizing molecules in electromagnetic waves or charged particle beams (for example, ultraviolet rays, electron beams, etc.) to cause a polymerization reaction. -A resin that has the ability to cure. The ionizing radiation curable resin contains an ionizing radiation curable functional group. The ionizing radiation curable functional group is a functional group capable of expressing ionizing radiation curable, and is at least one selected from the group consisting of a vinyl group, a (meth) acryloyl group, an allyl group, and an epoxy group. is there.

  Examples of the polymer having an ionizing radiation curable functional group include acrylic (meth) acrylate, urethane (meth) acrylate, polyester (meth) acrylate, epoxy (meth) acrylate, and polyether (meth) acrylate, and particularly urethane. (Meth) acrylate is preferred. These polymers may be used alone or in combination of two or more.

  The weight average molecular weight of the polymer having an ionizing radiation curable functional group is preferably 5000 or more and 150,000 or less, more preferably 20000 or more and 100,000 or less. If the weight average molecular weight is within the above range, the thixotropy of the ink composition can be obtained, and good moldability can also be obtained. The weight average molecular weight is, for example, a value measured by gel permeation chromatography (GPC), and is a value measured under conditions using polystyrene as a standard sample. From the viewpoint of obtaining excellent high hardness and scratch resistance, the double bond equivalent of the polymer is 50 or more and 1000 or less, preferably 100 or more and 1000 or less, more preferably 100 or more and 500 or less. The double bond equivalent is the molecular weight per ionizing radiation curable functional group.

  The polyfunctional isocyanate is a compound having two or more isocyanate groups. Polyfunctional isocyanate is, for example, aromatic isocyanate such as 2,4-tolylene diisocyanate (TDI), xylene diisocyanate (XDI), naphthalene diisocyanate, 4,4-diphenylmethane diisocyanate, or 1,6-hexamethylene diisocyanate (HMDI). ), Isophorone diisocyanate (IPDI), methylene diisocyanate (MDI), hydrogenated tolylene diisocyanate, hydrogenated diphenylmethane diisocyanate, and other polyisocyanates such as aliphatic (or alicyclic) isocyanates. In addition, adducts or multimers of these various isocyanates such as tolylene diisocyanate adducts, tolylene diisocyanate trimers, blocked isocyanate compounds, and the like can also be used.

  Of the polyfunctional isocyanates, those having at least one selected from a vinyl group, a (meth) acryloyl group, an allyl group and an epoxy group as the ionizing radiation-curable functional group are particularly preferred from the viewpoint of high hardness. Specifically, a polyfunctional isocyanate having at least one functional group having an ethylenically unsaturated bond and two or more isocyanate groups, such as “Laromer LR9000 (trade name)” (manufactured by BASF), is preferable.

  The ink composition may contain a solvent for the purpose of adjusting the viscosity. Examples of the solvent include hydrocarbons such as toluene and xylene; alcohols such as methanol, ethanol, isopropyl alcohol, butanol, isobutyl alcohol, methyl glycol, methyl glycol acetate, methyl cellosolve, ethyl cellosolve, and butyl cellosolve; acetone, methyl ethyl ketone, and methyl Ketones such as isobutyl ketone, cyclohexanone and diacetone alcohol; esters such as methyl formate, methyl acetate, ethyl acetate, ethyl lactate and butyl acetate; nitrogen-containing compounds such as nitromethane, N-methylpyrrolidone and N, N-dimethylformamide Ethers such as propylene glycol monomethyl ether, diisopropyl ether, tetrahydrofuran, dioxane, dioxolane; methylene chloride, chloroform Halogenated hydrocarbons such as rum, trichloroethane, tetrachloroethane; other substances such as dimethyl sulfoxide, propylene carbonate; or mixtures thereof. More preferred solvents are methyl ethyl ketone, methyl isobutyl ketone and the like.

  The amount of the solvent in the ink composition is such that the solid content of the polymer and the solid content including other photopolymerization initiators described later are 10 mass% or more and 50 mass% or less, preferably 20 mass% or more and 40 It is determined to be less than mass%.

  The ink composition may contain a photopolymerization initiator. The photopolymerization initiator is, for example, a photopolymerization initiator such as acetophenone, ketone, benzophenone, benzoin, ketal, anthraquinone, disulfide, thioxanthone, thiuram, or fluoroamine. Of these, acetophenone series, ketone series, and benzophenone series are preferably used. These photopolymerization initiators can be used alone or in combination of two or more.

  The content of the photopolymerization initiator is preferably about 0.5 to 10% by mass with respect to the above polymer, more preferably 1% by mass to 8% by mass, and still more preferably 3% by mass or more. And it is 8 mass% or less.

  The ink composition may contain various additives depending on the desired physical properties to be obtained. Additives include, for example, ultraviolet absorbers, infrared absorbers, light stabilizers, polymerization inhibitors, crosslinking agents, antistatic agents, antioxidants, leveling agents, thixotropic agents, coupling agents, plasticizers, antifoaming agents Agents, fillers and the like.

  When the base 21 and the pattern layer 22 include a thermosetting resin, examples of the thermosetting resin include phenol-formaldehyde resin, urea-formaldehyde resin, melamine-formaldehyde resin, resin obtained by curing acrylic polyol with isocyanate, polyester polyol Is a resin cured with isocyanate, a resin obtained by curing acrylic acid with melamine, and the like.

  When the base 21 and the pattern layer 22 include a thermoplastic resin, the thermoplastic resin is, for example, an acrylic resin, a vinyl resin, a polyester resin, or the like.

(Metal layer)
The metal layer 26 expresses the design of the decorative sheet 10 by reflecting the light that has reached the metal layer 26. The metal layer 26 includes a metal material such as chromium, indium, tin, and titanium. The thickness of the metal layer 26 is, for example, 10 nm or more and 100 nm or less. The thickness of the metal layer 26 is the thickness in the normal direction of the first wall surface 24 when the metal layer 26 is positioned on the first wall surface 24, and the thickness of the metal layer 26 is positioned on the second wall surface 25. Is the thickness of the second wall surface 25 in the normal direction. The metal layer 26 is provided on the convex portion 23 by, for example, a vapor deposition method.

(Adhesive layer)
As shown in FIGS. 2 and 3, the adhesive layer 14 enters the gap between the convex portions 23 of the decorative layer 20 and fills the gap. Moreover, the contact bonding layer 14 has the adhesiveness for affixing the decorating sheet 10 on articles | goods. The adhesiveness of the adhesive layer 14 may be manifested when the adhesive layer 14 is heated, or may be manifested when the adhesive layer 14 is at room temperature or below room temperature. That is, the adhesive layer 14 includes the concept of an adhesive layer.

  The thickness H3 of the adhesive layer 14 is at least larger than the thickness H2 of the convex portion 23 so that the adhesive layer 14 can fill a gap between the convex portions 23. The thickness H3 of the adhesive layer 14 is, for example, 15 μm or more and 45 μm or less.

The adhesive layer 14 is made of a resin having transparency.
For the adhesive layer 14, a heat-sensitive or pressure-sensitive resin suitable for the material of the article is appropriately used. For example, when the material of the article is an acrylic resin, it is preferable to use an acrylic resin. When the material of the article is a polyphenylene oxide / polystyrene resin, polycarbonate resin, or styrene resin, it is preferable to use an acrylic resin, polystyrene resin, polyamide resin or the like having an affinity for these resins. . Furthermore, when the material of the article is a polypropylene resin, it is preferable to use a chlorinated polyolefin resin, a chlorinated ethylene-vinyl acetate copolymer resin, a cyclized rubber, or a coumarone indene resin.

  In the case where the adhesive layer 14 is composed of a pressure-sensitive adhesive, examples of the material constituting the pressure-sensitive adhesive include natural rubber, synthetic rubber, acrylic resin, silicone resin, and polyester resin. Resins are preferably used. These pressure-sensitive adhesives can be used alone or in combination of two or more. The pressure-sensitive adhesive may contain other components, and may contain a crosslinking agent such as an isocyanate compound, a tackifier, various surfactants, a silane coupling agent, and the like as desired.

Decorated Article Next, the decorated article 30 will be described with reference to FIGS. 5 and 6. FIG. 5 is a cross-sectional view showing the decorative article 30. FIG. 6 is an enlarged view of the decorative article 30 shown in FIG.

  As shown in FIG. 5, the decorative article 30 includes an article 35 and a decorative sheet 10 attached to the article 35. The article 35 is produced by molding the substrate 40 using a mold to be described later. The article 35 is an automobile part, a household appliance, or the like.

  As shown in FIG. 5, the article 35 has, for example, a recess 36 formed by molding using a mold. In the following description, the surface of the substrate 40 on which the recess 36 is formed is referred to as an inner surface 42, and the surface located on the opposite side of the inner surface 42 is referred to as an outer surface 41. In the example shown in FIGS. 5 and 6, the decorative sheet 10 is attached to the outer surface 41 of the substrate 40.

  The substrate 40 includes a material having moldability. The material of the substrate 40 is, for example, an acrylic resin or a polycarbonate resin. The thickness of the board | substrate 40 can be 0.5 mm or more and 3.0 mm or less. The substrate 40 may contain a colorant.

  Next, with reference to FIG. 6, the design property expressed in the decorative article 30 will be described.

  When an observer visually recognizes the decorative article 30 from the decorative sheet 10 side along the fourth direction D4 parallel to the surface direction of the first wall surface 24 of the convex portion 23 of the decorative layer 20, the first wall surface 24 is The light reflected by the metal layer 26 provided on the surface hardly reaches the observer. For this reason, it is considered that the pattern of the metal layer 26 provided on the first wall surface 24 is hardly recognized by the observer.

  On the other hand, when the observer visually recognizes the decorative article 30 from the decorative sheet 10 side along the fifth direction D5 parallel to the surface direction of the second wall surface 25 of the convex portion 23 of the decorative layer 20, Compared with the case where the decorative article 30 is visually recognized along the direction D4, more light reflected by the metal layer 26 provided on the first wall surface 24 reaches the observer. For this reason, the observer can recognize the pattern of the metal layer 26 provided on the first wall surface 24.

  Thus, according to the present embodiment, the decorative layer 20 has the convex portion 23, and the area of the metal layer 26 on the first wall surface 24 of the convex portion 23 is the metal on the second wall surface 25 of the convex portion 23. By making it larger than the area of the layer 26, the appearance of the decorative article 30 can have viewing angle dependency.

  In addition, as shown in FIG. 6, the case where an observer visually recognizes the decoration article 30 from the board | substrate 40 side is also considered. Also in this case, when an observer visually recognizes the decorative article 30 from the decorative sheet 10 side along the fourth direction D4 parallel to the surface direction of the first wall surface 24 of the convex portion 23 of the decorative layer 20. The light reflected by the metal layer 26 provided on the first wall surface 24 hardly reaches the observer. On the other hand, when the observer visually recognizes the decorative article 30 from the decorative sheet 10 side along the fifth direction D5 parallel to the surface direction of the second wall surface 25 of the convex portion 23 of the decorative layer 20, Compared with the case where the decorative article 30 is visually recognized along the direction D4, more light reflected by the metal layer 26 provided on the first wall surface 24 reaches the observer. For this reason, the observer can recognize the pattern of the metal layer 26 provided on the first wall surface 24.

  By the way, the interface between the base material 13 and the decorative layer 20, the interface between the base portion 21 and the pattern layer 22, the interface between the decorative layer 20 and the adhesive layer 14, or the adhesive layer 14 and the substrate 40. When light is refracted at the interface between the two, it is considered that the observer recognizes the pattern of the metal layer 26 in a distorted state. Considering this point, preferably, the difference between the refractive index of the material forming the base material 13 and the refractive index of the material forming the base portion 21 of the decorative layer 20 is 0.05 or less. Moreover, Preferably, the difference between the refractive index of the material which comprises the base 21 of the decorating layer 20, and the refractive index of the material which comprises the pattern layer 22 of the decorating layer 20 is 0.05 or less. Preferably, the difference between the refractive index of the material constituting the pattern layer 22 of the decorative layer 20 and the refractive index of the material constituting the adhesive layer 14 is 0.05 or less. Preferably, the difference between the refractive index of the material constituting the adhesive layer 14 and the refractive index of the material constituting the substrate 40 is 0.05 or less. Thereby, the interface between the base material 13 and the decorative layer 20, the interface between the base portion 21 and the pattern layer 22, the interface between the decorative layer 20 and the adhesive layer 14, and the adhesive layer 14 and the substrate 40. It is possible to suppress the refraction of light at the interface between the two.

An example of a combination of materials that can satisfy the above-described refractive index difference is as follows.
Base material 13: Acrylic resin (refractive index is 1.49, for example)
Base 21 and pattern layer 22: acrylic ionizing radiation curable resin (refractive index is, for example, 1.54)
Adhesive layer 14: acrylic adhesive (refractive index is 1.54, for example)
-Substrate 40: acrylic resin (refractive index is 1.49, for example)

  As a refractometer for measuring the refractive index of each member and each layer described above, an Abbe refractometer DR-A1 manufactured by Atago Co., Ltd. can be used. The refractive index is measured according to JIS7142.

A method of manufacturing the decorative sheet Next, an example of a method of manufacturing the decorative sheet 10 will be described with reference to FIGS. 7 through 11.

  First, the 1st roll 51 with which the base material 13 was wound up is prepared. Next, as shown in FIG. 7, the base material 13 is unwound from the first roll 51. The conveyance direction of the base material 13 is parallel to the 3rd direction D3 where the convex part 23 of the above-mentioned decorating layer 20 extends, for example.

  Subsequently, as shown in FIG. 7, the first coating device 52 applies an ink composition 20 a containing an ionizing radiation curable resin onto the base material 13. For example, the first coating device 52 applies the ink composition 20a on the base material 13 by a die coating method. Although not shown, the ink composition 20a may be applied to the substrate 13 by other methods such as a gravure coating method and a slit reverse method. Thereafter, the ink composition 20 a is dried using a drying device (not shown) to form the resin layer 20 b on the substrate 13. In addition, when the ink composition 20a does not contain a solvent, the resin layer 20b is formed on a base material, without drying the ink composition 20a.

  Then, the convex part 23 is formed in the resin layer 20b using the embossing roll 54. FIG. FIG. 8 is a diagram illustrating a case where the embossing roll 54 is viewed from a direction orthogonal to the rotation shaft 54 a of the embossing roll 54. As shown in FIG. 8, a concave portion 55 extending in a direction orthogonal to the rotation shaft 54a is formed on the surface of the embossing roll 54. The concave portion 55 includes a first wall surface 56 corresponding to the first wall surface 24 of the convex portion 23 and a second wall surface 57 corresponding to the second wall surface 25 of the convex portion 23.

  As shown in FIG. 7, a pair of nip rolls 53 that sandwich the base material 13 and the resin layer 20 b between the embossing rolls 54 are provided on the upstream side and the downstream side of the embossing rolls 54 in the transport direction. In addition, a curing device 58 is provided at a position between the pair of nip rolls 53 in the transport direction to irradiate the resin layer 20b in contact with the embossing roll 54 by irradiating the resin layer 20b with ultraviolet rays. As long as the resin layer 20b can be cured, the electromagnetic wave or the like irradiated by the curing device 58 is not limited to ultraviolet rays.

  When the upstream nip roll 53 presses the base material 13 and presses the resin layer 20b against the surface of the embossing roll 54, a convex portion 23 corresponding to the concave portion 55 of the embossing roll 54 is formed on the surface of the resin layer 20b. . In this state, the curing device 58 irradiates the resin layer 20b with ultraviolet rays to cure the resin layer 20b. Thereby, the decoration layer 20 including the base portion 21 and the pattern layer 22 including the plurality of convex portions 23 formed on the base portion 21 is obtained. Thereafter, the downstream nip roll 53 peels the base material 13 and the decorative layer 20 from the embossing roll 54. The base material 13 and the decoration layer 20 are wound up to form the second roll 59.

  When the curing device 58 completely cures the resin layer 20b, the pattern layer 22 of the decorative layer 20 may be easily damaged in the subsequent manufacturing process of the decorative article 30. For example, it is conceivable that the tip of the convex portion 23 of the pattern layer 22 is missing. Considering this point, the curing device 58 may irradiate the resin layer 20b with ultraviolet rays or the like to the extent that the resin layer 20b is not completely cured. That is, the curing process by the curing device 58 may be a so-called half cure process.

  Then, the process of forming the metal layer 26 on the convex part 23 of the decoration layer 20 is implemented. First, as shown in FIG. 9, the laminate of the pattern layer 22 including the base material 13, the base portion 21, and the plurality of convex portions 23 is unwound from the second roll 59. Subsequently, as illustrated in FIG. 9, the vapor deposition device 60 evaporates the vapor deposition material 60 a including the metal material toward the convex portion 23. As a result, the vapor deposition material 60 a adheres to the convex portion 23, and the metal layer 26 is formed on the convex portion 23. In this manner, the decorative layer 20 having the base portion 21, the pattern layer 22 including the plurality of convex portions 23 provided on the base portion 21, and the metal layer 26 provided on the convex portion 23 is obtained. The laminated body including the base material 13 and the decorative layer 20 is wound up to form the third roll 61.

  FIG. 10 is a diagram illustrating a case where the base material 13 and the decorative layer 20 are cut along a plane orthogonal to the third direction D3 of FIG. As shown in FIG. 10, the vapor deposition apparatus 60 evaporates the vapor deposition material 60 a so that the vapor deposition material 60 a reaches the convex portion 23 from the vapor deposition direction D <b> 6 inclined with respect to the normal direction of the base material 13 and the base portion 21. As a result, a large amount of vapor deposition material 60 a can be attached to either the first wall surface 24 or the second wall surface 25 of the convex portion 23. Here, the vapor deposition direction D6 is set so that the angle formed by the vapor deposition direction D6 and the first wall surface 24 of the convex portion 23 is larger than the angle formed by the vapor deposition direction D6 and the second wall surface 25 of the convex portion 23. . As a result, a larger amount of vapor deposition material 60 a than the second wall surface 25 can be attached to the first wall surface 24 of the convex portion 23. Thereby, the area of the metal layer 26 provided on the first wall surface 24 of the protrusion 23 can be made larger than the area of the metal layer 26 provided on the second wall surface 25 of the protrusion 23. Although only one vapor deposition device 60 is installed in FIG. 10, a plurality of vapor deposition devices 60 may be installed as necessary. Moreover, in order to form the metal layer 26 in all the convex parts 23, the lamination | stacking of the pattern layer 22 containing the distance between the convex part 23 and the vapor deposition apparatus 60, the base material 13, the base 21, and the several convex part 23 is carried out. You may adjust the conveyance speed of a body.

  Then, the process of forming the contact bonding layer 14 on the convex part 23 is implemented. First, as shown in FIG. 11, the laminate including the base material 13 and the decorative layer 20 is unwound from the third roll 61. Subsequently, as shown in FIG. 11, the second coating device 62 applies the pressure-sensitive adhesive constituting the adhesive layer 14 onto the decorative layer 20. Next, the drying device 63 dries the adhesive. For example, the drying device 63 heats the adhesive and evaporates the solvent in the adhesive. Thereby, the adhesive layer 14 that fills the gaps between the convex portions 23 can be formed on the decorative layer 20. Thus, the decorating sheet 10 provided with the base material 13, the decorating layer 20, and the contact bonding layer 14 can be produced. In the case where the adhesive layer 14 is a thermoplastic resin that is a heat-sensitive or pressure-sensitive resin, the thermoplastic resin can be laminated on the decorative layer 20 using a melt extrusion laminating method.

  Subsequently, as shown in FIG. 11, a separator film 17 may be provided on the adhesive layer 14. For example, the separator film 17 is unwound from the fourth roll 64. The laminating roll 65 causes the separator film 17 to be laminated on the adhesive layer 14. The decorative sheet 10 to which the separator film 17 is attached is wound up to form the fifth roll 66.

Method for producing a decorated article Next, an example of a method for manufacturing a decorated article 30 will be described with reference to FIGS. 12 to 17. First, with reference to FIG. 12, the decorative article manufacturing apparatus 70 which manufactures the decorative article 30 is demonstrated.

  The decorative article manufacturing apparatus 70 can perform a process of forming the article 40 by forming the substrate 40, a process of forming the decorative sheet 10, and a process of attaching the decorative sheet 10 to the substrate 40. That is, the decorative article manufacturing apparatus 70 can perform a so-called primary decorative molding method in which the substrate 40 is molded and the decorative sheet 10 is attached to the substrate 40 in one apparatus. As shown in FIG. 12, the decorative article manufacturing apparatus 70 includes a first chamber 71, a mold 72, an adsorption unit 73, a first heating unit 74, a holding unit 75, a second heating unit 76, a first pressure adjustment unit 77, The moving part 78, the second chamber 79 and the second pressure adjusting part 80 are provided.

  By combining the first chamber 71 with the holding unit 75 and the second chamber 79, the space inside the first chamber 71 can be sealed from the outside. A mold 72 is disposed in the first chamber 71.

  The mold 72 forms the substrate 40 and the decorative sheet 10 to form the above-described recess 36 in the substrate 40. FIG. 13 is a plan view showing the mold 72. The mold 72 is partitioned into a molding part 72a and a frame part 72c around the molding part 72a. The molding portion 72 a is provided with a recess 72 b corresponding to the recess 36 of the article 35.

  The adsorbing part 73 brings a member (here, the decorative sheet 10) to be molded into close contact with the molding part 72a of the mold 72 and gives the member a shape corresponding to the concave part 72b of the molding part 72a. As illustrated in FIGS. 12 and 13, the suction unit 73 includes, for example, a plurality of suction ports provided in the frame portion 72 c of the mold 72. In this case, the decorative sheet 10 can be brought into close contact with the mold 72 by sucking a gas such as air from the decorative sheet 10 side to the opposite side through the suction port.

  The first heating unit 74 heats the decorative sheet 10 that is in close contact with the mold 72 and softens the decorative sheet 10. The 1st heating part 74 is an infrared heater which heats the decorating sheet 10 by irradiating infrared rays to the decorating sheet 10, for example. The 1st heating part 74 is arrange | positioned between the type | mold 72 and the decorating sheet 10, for example. In addition, as long as the 1st heating part 74 can heat the decorating sheet 10 and can soften the decorating sheet 10, arrangement | positioning of the 1st heating part 74 is not restricted especially.

  The holding unit 75 holds the substrate 40 so that the outer surface 41 of the substrate 40 faces the decorative sheet 10 on the side opposite to the mold 72. As illustrated in FIG. 12, the holding unit 75 holds, for example, an end portion of the substrate 40.

  The second heating unit 76 heats the substrate 40 and softens the substrate 40. The second heating unit 76 is, for example, an infrared heater that heats the substrate 40 by irradiating the substrate 40 with infrared rays. For example, the second heating unit 76 is disposed to face the substrate 40 on the side opposite to the mold 72. In addition, as long as the 2nd heating part 76 can heat the board | substrate 40 and can soften the board | substrate 40, arrangement | positioning of the 2nd heating part 76 is not restricted in particular.

  The first pressure adjusting unit 77 adjusts the pressure of a sealed space (hereinafter also referred to as a first sealed space) when the space inside the first chamber 71 is sealed from the outside. For example, the first pressure adjustment unit 77 discharges a gas such as air inside the first chamber 71 to the outside, and the first sealed space around the mold 72 is set to a reduced pressure atmosphere P1 lower than atmospheric pressure. .

  The moving unit 78 moves the mold 72 relative to the substrate 40 held by the holding unit 75. For example, as shown in FIG. 12, the moving unit 78 supports the mold 72, and moves the mold 72 up and down, for example, as will be described later. The moving unit 78 includes, for example, an air cylinder.

    The second chamber 79 is located on the opposite side of the substrate 40 from the first chamber 71. That is, the second chamber 79 is located on the side of the surface of the substrate 40 opposite to the surface that contacts the decorative sheet 10. By combining the second chamber 79 with the holding unit 75 and the first chamber 71, the space inside the second chamber 79 can be sealed from the outside.

  When the space inside the second chamber 79 is sealed from the outside, the second pressure adjusting unit 80 adjusts the pressure of the sealed space (hereinafter also referred to as a second sealed space). For example, the second pressure adjusting unit 80 introduces compressed air or the like into the second chamber 79 to make the second sealed space a pressurized atmosphere P2 higher than atmospheric pressure.

  Hereinafter, with reference to FIG. 12 thru | or FIG. 17, the method to produce the decoration article 30 using the decoration article manufacturing apparatus 70 is demonstrated.

  First, the separator film 17 is removed from the decorative sheet 10. Next, as shown in FIG. 12, the decorative sheet 10 is arranged so that the first surface 11 of the decorative sheet 10 faces the concave portion 72 b of the mold 72. Further, the substrate 40 is arranged so that the outer surface 41 of the substrate 40 faces the decorative sheet 10.

  Subsequently, as illustrated in FIG. 14, the first heating unit 74 heats the decorative sheet 10 and softens the decorative sheet 10. In addition, the adsorbing unit 73 sucks a gas such as air, and causes the decorative sheet 10 to adhere to the concave portion 72 b of the mold 72. The heating of the decorative sheet 10 by the first heating unit 74 may be started before suction by the suction unit 73, may be started later, or may be started simultaneously. After the decorative sheet 10 is brought into close contact with the mold 72, the first heating unit 74 is removed from the space between the first chamber 71 and the substrate 40.

  The second heating unit 76 heats the substrate 40 and softens the substrate 40. The heating of the substrate 40 by the second heating unit 76 may be started before or after the heating of the decorative sheet 10 by the first heating unit 74 and the suction by the suction unit 73, and at the same time You may start. In addition, the heating of the substrate 40 by the second heating unit 76 may be started before the decompression of the first sealed space by the first pressure adjusting unit 77 described later, may be started later, or started simultaneously. May be. After the substrate 40 is softened, the second heating unit 76 is removed from the space between the second chamber 79 and the substrate 40.

Subsequently, as shown in FIG. 15, the first chamber 71 is moved relative to the holding unit 75 to combine the first chamber 71 and the holding unit 75. Accordingly, the space surrounded by the first chamber 71, the holding unit 75, and the substrate 40 becomes the first sealed space. Next, the 1st pressure adjustment part 77 makes the 1st sealed space the decompression atmosphere P1. The reduced-pressure atmosphere P1 is, for example, 0.05 atm (0.05 × 10 ⁵ Pa) or more and 0.3 atm (0.3 × 10 ⁵ Pa) or less, and more preferably 0.1 atm (0.1 × 10 ⁵ Pa). ) And 0.2 atm (0.2 × 10 ⁵ Pa) or less. Further, as shown in FIG. 15, the second chamber 79 is moved relative to the holding portion 75 to combine the second chamber 79 and the holding portion 75. Accordingly, the space surrounded by the second chamber 79, the holding unit 75, and the substrate 40 becomes the second sealed space.

Then, as shown in FIG. 16, the 2nd pressure adjustment part 80 makes the 2nd sealed space into pressurized atmosphere P2. The pressurized atmosphere P2 is, for example, 1 atm (1.0 × 10 ⁵ Pa) or more and 3 atm (3.0 × 10 ⁵ Pa) or less. Further, as shown in FIG. 16, the moving unit 78 moves the mold 72 to which the decorative sheet 10 is in close contact toward the substrate 40.

Since the first sealed space is the decompressed atmosphere P1 and the second sealed space is the pressurized atmosphere P2, there is a predetermined pressure difference ΔP between the two. For this reason, as shown in FIG. 16, the substrate 40 is in close contact with the decorative sheet 10 in close contact with the mold 72. As a result, the substrate 40 is formed along the recess 72 b of the mold 72. In addition, the decorative sheet 10 is attached to the outer surface 41 of the substrate 40 by the adhesive layer 14 of the decorative sheet 10. The pressure difference ΔP is, for example, 0.9 atm (0.9 × 10 ⁵ Pa) or more and 2.9 atm (2.9 × 10 ⁵ Pa) or less.

  Subsequently, as shown in FIG. 17, the first chamber 71 and the second chamber 79 are separated from the holding portion 75 to open the first sealed space and the second sealed space. Further, the holding portion 75 is removed from the substrate 40. Then, the unnecessary part of the board | substrate 40 and the decorating sheet 10 is removed. In this manner, a decorative article 30 including the article 35 including the molded substrate 40 and the decorative sheet 10 attached to the article 35 can be produced. In addition, after opening the 1st sealed space and the 2nd sealed space, before removing the holding | maintenance part 75 from the board | substrate 40 or removing the unnecessary part of the board | substrate 40 and the decorating sheet 10, the board | substrate 40 and decorating A step of cooling the sheet 10 may be performed. The cooling process includes air cooling, cooling to room temperature, and the like.

  In addition, when the above-mentioned process of hardening the resin layer 20b using the hardening apparatus 58 is a half-cure process, after adhering the decorating sheet 10 to the board | substrate 40, it irradiates with ultraviolet rays and decorates the decorating sheet 10 A step of further curing the layer 20, a so-called after-curing step may be performed.

  According to the present embodiment, the decorative article manufacturing apparatus 70 can perform both the forming of the substrate 40 and the attaching of the decorative sheet 10 to the substrate 40. For this reason, the manufacturing process of the decorative article 30 can be reduced, and thereby the productivity of the decorative article 30 can be improved.

  Note that various modifications can be made to the above-described embodiment. Hereinafter, modified examples will be described with reference to the drawings as necessary. In the following description and the drawings used in the following description, the same reference numerals as those used for the corresponding parts in the above embodiment are used for the parts that can be configured in the same manner as in the above embodiment. A duplicate description is omitted. In addition, when it is clear that the operational effects obtained in the above-described embodiment can be obtained in the modified example, the description thereof may be omitted.

(First modification of the decorative layer 20)
In the above-described embodiment, an example in which the convex portion 23 of the decorative layer 20 has a triangular cross-sectional shape protruding toward the adhesive layer 14 side is shown. However, as long as the decorative layer 20 can have viewing angle dependency, the cross-sectional shape of the convex portion 23 is not particularly limited. For example, as shown in FIG. 18, the convex portion 23 of the decorative layer 20 may have a semicircular cross-sectional shape that protrudes toward the adhesive layer 14.

(Second modification of the decorative layer 20)
Moreover, as shown in FIG. 19, the convex part 23 of the decorating layer 20 may have the rectangular or square cross-sectional shape which protruded to the contact bonding layer 14 side. In this case, the first wall surface 24 and the second wall surface 25 of the convex portion 23 are orthogonal to the first direction D1 and the second direction D2, respectively.

(Third modification of the decorative layer 20)
In this Embodiment mentioned above, the example in which the convex part 23 of the decorating layer 20 extended along the surface direction of the decorating sheet 10 was shown. However, the shape of the convex part 23 in the surface direction of the decorative sheet 10 is not particularly limited as long as the decorative layer 20 can have viewing angle dependency. For example, as shown in FIG. 20, the convex portion 23 may be a hemispherical portion discretely formed on the base portion 21.

(Modification of decorative sheet)
As shown in FIG. 21, the decorative sheet 10 may further include a picture layer 15 positioned between the base material 13 and the decorative layer 20. Designs and information such as letters, numbers, symbols, figures, and patterns are applied to the pattern layer 15 by printing or the like. By providing the pattern layer 15, the design of the decorative sheet 10 can be improved.

  The pattern layer includes a binder and a colorant. As the binder, resins such as vinyl resins, polyester resins, acrylic resins, polyvinyl acetal resins, and cellulose resins can be used. As the colorant, a pigment or a dye can be used. The thickness of the pattern layer is preferably 5 to 40 μm, more preferably 5 to 30 μm from the viewpoint of design.

  Note that the pattern layer may be provided on the article 35 instead of the decorative sheet 10.

(Anchor layer)
The decorative sheet 10 may include an anchor layer. The anchor layer is a layer provided as desired in order to improve the adhesion between the decorative layer 20 and the adhesive layer 14 or, if there is a pattern layer, the pattern layer. Anchor layer is a two-component cured urethane resin, thermosetting urethane resin, melamine resin, cellulose ester resin, chlorine-containing rubber resin, chlorine-containing vinyl resin, acrylic resin, epoxy resin, vinyl copolymer Resin or the like can be used. The thickness of the anchor layer is usually 0.1 μm or more and 5 μm or less, preferably 1 μm or more and 5 μm or less.

(Antistatic layer)
The decorative sheet 10 may include an antistatic layer. The antistatic layer is a layer that is preferably provided in order to prevent foreign matter from adhering to the decorative sheet 10 or the decorative article 30, and is provided on the surface of the base material 13 opposite to the surface on which the decorative layer 20 is provided. It is done.
Antistatic agents used for the antistatic layer include anionic surfactants such as carboxylic acid, sulfonic acid, and phosphoric acid; cationic surfactants such as quaternary ammonium; alkylbetaine, alkylimidazoline , Amphoteric surfactants such as alkylalanine; nonionic surfactants such as alkylene oxide polymers, alkylene oxide copolymers, aliphatic alcohol-alkylene oxide adducts; carbon, gold, platinum, silver, copper, Inorganic conductive materials such as various metal powders such as aluminum, nickel, titanium and molybdenum; polyacetylene, polypyrrole, polyparaphenylene, polyaniline, polythiophene, polyphenylene vinylene, polyvinylcarbazole, or aminocarboxylic acid, dicarboxylic acid and polyethylene glycol A conductive polymer such as polyether ester amide resin consisting Lumpur are preferably exemplified. The thickness of the antistatic layer is usually preferably 0.1 μm or more and 5 μm or less. If the thickness of the antistatic layer is within the above range, excellent antistatic performance can be obtained efficiently.

(Modification of mold)
As shown in FIG. 22, a groove 72 d may be formed on the surface of the frame 72 c of the mold 72 on the side where the decorative sheet 10 is in close contact. In this case, the suction port of the suction portion 73 is preferably provided in the groove 72d. By forming the groove 72d, the decorative sheet 10 can be easily adhered to the mold 72.

(Modified example of decorated article)
In this Embodiment mentioned above, the example in which the decorating sheet 10 was affixed on the outer surface 41 of the board | substrate 40 which comprises the decorating article 30 was shown. In addition, as shown in FIG. 23, the decorative sheet 10 may be attached to the inner surface 42 of the substrate 40 constituting the decorative article 30.

(First modification of the method of manufacturing a decorative article)
In this Embodiment mentioned above, the example which shape | molds the decorating sheet 10 and the board | substrate 40 using the type | mold 72 which has the recessed part 72b, and manufactured the decorating article 30 was shown. In this modification, as shown in FIG. 24, an example in which a decorative article 30 is manufactured by forming a decorative sheet 10 and a substrate 40 using a mold 72 having a convex portion 72e will be described.

  Hereinafter, with reference to FIG. 25 thru | or FIG. 28, the method to produce the decorating article 30 using the decorating article manufacturing apparatus 70 shown in FIG. 24 is demonstrated. In addition, about the description which overlaps with the case where the decoration article 30 is produced using the decoration article manufacturing apparatus 70 shown in FIG. 12, it abbreviate | omits suitably.

  First, as shown in FIG. 24, the decorative sheet 10 is arranged so that the first surface 11 of the decorative sheet 10 faces the convex portion 72 e of the mold 72. Further, the substrate 40 is arranged so that the inner surface 42 of the substrate 40 faces the decorative sheet 10. Subsequently, as shown in FIG. 25, the decorative sheet 10 is brought into close contact with the convex portion 72 e of the mold 72. Subsequently, as shown in FIG. 26, a first sealed space is formed on the first chamber 71 side, and a second sealed space is formed on the second chamber 79 side. Further, the first sealed space is set to a reduced pressure atmosphere P1.

  Subsequently, as shown in FIG. 27, the second sealed space is set to a pressurized atmosphere P2. In addition, as illustrated in FIG. 27, the moving unit 78 moves the mold 72 to which the decorative sheet 10 is in close contact toward the substrate 40. Thereby, the substrate 40 is formed along the convex portion 72e of the mold 72. The decorative sheet 10 is attached to the inner surface 42 of the substrate 40 by the adhesive layer 14 of the decorative sheet 10.

  Subsequently, as shown in FIG. 28, the first chamber 71 and the second chamber 79 are separated from the holding portion 75 to open the first sealed space and the second sealed space. Further, the holding portion 75 is removed from the substrate 40. Then, the unnecessary part of the board | substrate 40 and the decorating sheet 10 is removed. In this manner, a decorative article 30 including the article 35 including the molded substrate 40 and the decorative sheet 10 attached to the article 35 can be produced.

(Second modification of the method for manufacturing a decorative article)
In this Embodiment mentioned above, the example which implements both shaping | molding of the board | substrate 40 and the sticking of the decorating sheet 10 to the board | substrate 40 with the decorating article manufacturing apparatus 70 was shown. In this modification, the decorative article manufacturing apparatus 70 manufactures the decorative article 30 by pasting the decorative sheet 10 on the article 35 obtained by previously forming the substrate 40, that is, secondary processing. An example of the decorative molding method will be described. Specifically, an example using a three-dimensional surface decoration technique (so-called TOM method: Three dimension Overlay Method) will be described.

  FIG. 29 is a diagram showing a decorative article manufacturing apparatus 70 in the present modification. Description of the same constituent elements as those of the decorative article manufacturing apparatus 70 in the present embodiment described above in the decorative article manufacturing apparatus 70 of the present modification will be omitted.

  As shown in FIG. 29, in the first chamber 71, an article 35 obtained by previously forming the substrate 40 is disposed. The holding unit 75 holds the decorative sheet 10 such that the second surface 12 of the decorative sheet 10 faces the article 35. The first heating unit 74 is disposed on the second chamber 79 side. The moving unit 78 moves the article 35 relative to the decorative sheet 10 held by the holding unit 75.

  Hereinafter, with reference to FIG. 30 thru | or FIG. 33, the method to produce the decorating article 30 using the decorating article manufacturing apparatus 70 shown in FIG. 29 is demonstrated.

  First, as shown in FIG. 29, the article 35 is placed on the moving unit 78. Further, the holding unit 75 and the decorative sheet 10 are arranged so that the second surface 12 of the decorative sheet 10 held by the holding unit 75 faces the article 35. In addition, the first chamber 71 and the holding unit 75 are combined to form a first sealed space inside the first chamber 71.

  Subsequently, as shown in FIG. 30, a second sealed space is formed in the second chamber 79. Moreover, the 1st pressure adjustment part 77 makes the 1st sealed space the decompression atmosphere P1 of a pressure lower than atmospheric pressure. Moreover, the 2nd pressure adjustment part 80 makes the 2nd sealed space the decompression atmosphere P1 of a pressure lower than atmospheric pressure. Moreover, the 1st heating part 74 heats the decorating sheet 10, and softens the decorating sheet 10. FIG. By setting the first sealed space to a reduced pressure atmosphere P1, when the decorative sheet 10 is brought into close contact with the article 35 in the next step, it is possible to prevent bubbles from remaining between the decorative sheet 10 and the article 35. Can do. Moreover, when the 2nd sealed space is made into the pressure reduction atmosphere P1, when the decorating sheet 10 is heated, it can suppress that the decorating sheet 10 dents to the 1st chamber 71 side. For this reason, the decorating sheet 10 can be heated more uniformly in the surface direction by using the first heating unit 74. Note that the pressure of the decompressed atmosphere P1 in the first sealed space and the pressure of the decompressed atmosphere P1 in the second sealed space may be the same or different.

Subsequently, as illustrated in FIG. 31, the moving unit 78 moves the article 35 toward the decorative sheet 10. Further, as shown in FIG. 32, the second pressure adjusting unit 80 introduces compressed air or the like into the second chamber 79 to make the second sealed space a pressurized atmosphere P2 having a pressure higher than the atmospheric pressure. As a result, the decorative sheet 10 is in close contact with the article 35 due to the pressure difference ΔP between the first sealed space and the second sealed space. Thereby, the decorative sheet 10 is formed along the shape of the article 35. In addition, the decorative sheet 10 is attached to the substrate 40 by the adhesive layer 14 of the decorative sheet 10. The pressure difference ΔP is, for example, 0.9 atm (0.9 × 10 ⁵ Pa) or more and 2.9 atm (2.9 × 10 ⁵ Pa) or less.

  When the decorative sheet 10 can be brought into close contact with the article 35 even when the pressure in the second sealed space is atmospheric pressure or lower than the atmospheric pressure, the second pressure adjusting unit 80 is used for the second sealed space. May not be adjusted to the pressurized atmosphere P2. For example, the second sealed space may be atmospheric pressure.

  Subsequently, as shown in FIG. 33, the first chamber 71 and the second chamber 79 are separated from the holding portion 75 to open the first sealed space and the second sealed space. Further, the holding portion 75 is removed from the decorative sheet 10. Then, the unnecessary part of the decorating sheet 10 is removed. In this manner, a decorative article 30 including the article 35 including the molded substrate 40 and the decorative sheet 10 attached to the article 35 can be produced.

  Note that the second pressure adjusting unit 80 may adjust the second sealed space to the pressurized atmosphere P2 by introducing pressurized and heated water vapor into the second chamber 79. That is, the decorative article manufacturing apparatus 70 may be an air transfer device (so-called NATS: Navitas Air-heat Transfer System).

(3rd modification of the manufacturing method of a decorative article)
In this modification, an example using a hot plate type reduced pressure coating method will be described as another example of the secondary decorative molding method.

  FIG. 34 is a diagram showing a decorative article manufacturing apparatus 70 in the present modification. Description of the same constituent elements as those of the decorative article manufacturing apparatus 70 shown in FIG.

  As shown in FIG. 34, the decorative sheet 10 is disposed so as to cover the opening of the first chamber 71. The first heating unit 74 is disposed so as to heat the decorative sheet 10 from the side opposite to the article 35. The first heating unit 74 is configured to heat the decorative sheet 10 by contacting the decorative sheet 10. For example, the first heating unit 74 is a hot plate including a heater such as a heating wire.

  Hereinafter, with reference to FIG. 35 thru | or FIG. 37, the method of producing the decorating article 30 using the decorating article manufacturing apparatus 70 shown in FIG. 34 is demonstrated.

  First, as shown in FIG. 34, the article 35 is placed inside the first chamber 71. In addition, the decorative sheet 10 is arranged so that the opening of the first chamber 71 is covered with the decorative sheet 10.

  Subsequently, as shown in FIG. 35, the first heating unit 74 is brought into contact with the first surface 11 of the decorative sheet 10. As a result, the first heating unit 74 heats the decorative sheet 10 and softens the decorative sheet 10. In addition, the space surrounded by the first chamber 71 and the first heating unit 74 becomes the first sealed space. Next, the 1st pressure adjustment part 77 makes the 1st sealed space the decompression atmosphere P1. Thereby, the decorative sheet 10 is more closely attached to the first heating unit 74.

  Subsequently, as shown in FIG. 36, compressed air is introduced into the space between the first surface 11 of the decorative sheet 10 and the first heating unit 74 through a through-hole (not shown) of the first heating unit 74. To do. Thereby, the space between the decorating sheet 10 and the 1st heating part 74 is made into pressurized atmosphere P2. As a result, the decorative sheet 10 is in close contact with the article 35 as shown in FIG. Thereby, the decorative sheet 10 is formed along the shape of the article 35. In addition, the decorative sheet 10 is attached to the substrate 40 by the adhesive layer 14 of the decorative sheet 10.

  Subsequently, as shown in FIG. 37, the first heating unit 74 is separated from the decorative sheet 10. Further, the first chamber 71 is separated from the decorative sheet 10 and the substrate 40. Then, the unnecessary part of the decorating sheet 10 is removed. In this manner, a decorative article 30 including the article 35 including the molded substrate 40 and the decorative sheet 10 attached to the article 35 can be produced.

(Other variations)
The method for attaching the decorative sheet 10 to the article 35 is not limited to the above-described method.

  In addition, although some modified examples with respect to the above-described embodiment have been described, naturally, a plurality of modified examples can be applied in combination as appropriate.

DESCRIPTION OF SYMBOLS 10 Decorating sheet 11 1st surface 12 2nd surface 13 Base material 14 Adhesive layer 15 Picture layer 17 Separator film 20 Decorating layer 21 Base part 22 Pattern layer 23 Convex part 24 1st wall surface 25 2nd wall surface 26 Metal layer 30 Decoration Article 35 Article 36 Recess 40 Substrate 41 Outer surface 42 Inner surface 51 First roll 52 First coating device 53 Nip roll 54 Embossing roll 55 Recess 56 First wall surface 57 Second wall surface 58 Curing device 59 Second roll 60 Deposition device 61 Third roll 62 Second coating device 63 Drying device 64 Fourth roll 65 Laminating roll 66 Fifth roll 70 Decorated article manufacturing device 71 First chamber 72 Mold 72a Molding portion 72b Recessed portion 72c Frame portion 72d Groove 72e Protruding portion 73 Adsorbing portion 74 First heating Unit 75 holding unit 76 second heating unit 77 first pressure adjusting unit 78 moving unit 79 second chamber 80 second pressure adjusting unit

Claims (6)

A decorative sheet,
A substrate;
A decorative layer that is laminated on the base material and includes a plurality of convex portions and a metal layer provided on the convex portions;
An adhesive layer laminated on the decorative layer,
The surface of the convex part is a first wall surface that is visually recognized when the convex part is viewed along a first direction parallel to the surface direction of the decorative sheet, and a second direction opposite to the first direction. A second wall surface that is visible when the convex portion is viewed along
The decorative sheet, wherein an area of the metal layer provided on the first wall surface of the convex portion is larger than an area of the metal layer provided on the second wall surface of the convex portion.   The area of the metal layer provided on the second wall surface of the convex portion is less than 0.5 times the area of the metal layer provided on the first wall surface of the convex portion. Decorative sheet.   The difference in refractive index between the base material and the decorative layer, and the refractive index difference between the decorative layer and the adhesive layer are 0.05 or less, according to claim 1 or 2. The decorative sheet as described. Goods,
A decorative sheet affixed to the article,
The decorative sheet is
An adhesive layer in contact with the article;
A decorative layer that is laminated to the adhesive layer and includes a plurality of convex portions and a metal layer provided on the convex portions;
A substrate laminated on the decorative layer,
The surface of the convex part is a first wall surface that is visually recognized when the convex part is viewed along a first direction parallel to the surface direction of the decorative sheet, and a second direction opposite to the first direction. A second wall surface that is visible when the convex portion is viewed along
The decorative article, wherein an area of the metal layer provided on the first wall surface of the convex portion is larger than an area of the metal layer provided on the second wall surface of the convex portion.   The area of the said metal layer provided in the said 2nd wall surface of the said convex part is less than 0.5 times the area of the said metal layer provided in the said 1st wall surface of the said convex part. Decorative items.   The difference in refractive index between the base material of the decorative sheet and the decorative layer, and the difference in refractive index between the decorative layer of the decorative sheet and the adhesive layer are 0.05. The decorative article according to claim 4 or 5, which is the following.

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