JP2010167600A - Metallic-toned decorative sheet and decorative plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metallic-toned decorative sheet capable of maintaining sufficiently an attractive appearance of a metal foil, even when applied to a hard resin. <P>SOLUTION: This metallic-toned decorative sheet A includes a polyethylene terephthalate resin layer 1 containing a polyethylene terephthalate as a main component, and having 25-500 MPa of tensile stress at 5% of expansion, an aluminum foil 2 of a metal foil layer with an embossed metal foil, and a transparent resin layer 3, in this order. In concretely saying, the transparent resin layer 3 is provided on an upper face of a thermoplastic film 6 via a print coating layer 7, a shape holding layer 5 comprising an adhesive is provided on an under face, to be bonded onto the embossed aluminum foil 2, and the polyethylene terephthalate resin layer 1 is provided on an under face of the aluminum foil 2 via a polypropylene synthetic resin layer 4. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is used as a housing interior material, for example, a surface material for home appliances, kitchen doors, storage doors, etc., for example, a surface material for televisions, refrigerators, etc., and a metallic makeup used to give the surface a metallic design. The present invention relates to a sheet and a decorative board using the sheet.

  Conventionally, this type of house interior material, TV and refrigerator doors, surface materials such as kitchen doors, coated steel sheets coated with metal plates, vinyl chloride films filled with metal powder and polyester films There is a decorative metal plate or the like in which a decorative sheet to which is attached is attached to a steel plate through an adhesive.

  In recent years, the main component is at least one selected from the group consisting of a modified polypropylene modified with an unsaturated carboxylic acid or an unsaturated carboxylic acid derivative, a modified polyethylene, and a modified ethylene-propylene rubber. By applying a modified polyolefin resin layer having a tensile stress of 25 to 500 MPa, a metallic decorative sheet that exhibits excellent adhesion to metal without using an adhesive has been proposed (for example, Patent Document 1). reference).

  By applying the metal-like decorative sheet of the document, the decorative metal plate on which the decorative sheet is laminated exhibits characteristics excellent in secondary workability such as cutting, punching, bending, and deep drawing. .

    JP-A-2005-246887

  However, the current household electrical appliances are increasingly using hard resin such as ABS resin other than metal on the surface for various reasons such as molding reasons and weight reduction.

  For example, what is described in the above-mentioned patent document is not always applicable to such a thing. That is, in order to adhere the sheet to the hard resin, it is essential to stick the sheet with the adhesive layer interposed. Therefore, it is most important that the characteristics required for the decorative sheet when manufacturing such a decorative board can be widely applied to various existing adhesive materials.

  That is, the present situation is that a metallic decorative sheet for hard resin that can maintain at least an equivalent finish to the finish when the decorative sheet is applied to the steel sheet is required.

  This invention pays attention to such a malfunction, and provides the metal-like decorative sheet which can maintain the appearance of metal foil enough even if it applies to hard resin.

  In order to achieve such an object, the present invention takes the following measures. That is, the metallic decorative sheet according to the present invention is composed of polyethylene terephthalate as a main component, a polyethylene terephthalate resin layer having a tensile stress of 25 to 500 MPa at 5% elongation, a metal foil layer obtained by embossing a metal foil, and a transparent resin layer. Are provided in this order.

  The decorative board of the present invention is characterized in that the above-described metallic decorative sheet is laminated on a decorative board main body whose surface is made of a hard resin via an adhesive layer.

  In such a case, by applying a metal-like decorative sheet having a configuration in which a polyethylene terephthalate resin layer, an embossed metal foil layer, and a transparent resin layer are provided in this order, a metal finish excellent in design is provided. Further, the decorative board on which the decorative sheet is laminated becomes a decorative board excellent in processability. In particular, by providing a polyethylene terephthalate resin that can be suitably applied to a wide variety of existing adhesives, it is possible to provide an excellent decorative board with further improved adhesion to a decorative board body made of a hard resin. It becomes possible.

  Here, as specific examples of known polyethylene terephthalate resin, a colored or transparent amorphous polyethylene terephthalate resin called APET, a biaxially stretched polyethylene terephthalate resin usually called PET, etc. Furthermore, amorphous copolymer polyethylene terephthalate, commonly referred to as PETG, can be used. The thickness is preferably about 12 to 250 μm, but is particularly preferably 25 to 188 μm from the viewpoint of cost and moldability. If it is thinner than this, the unevenness of the decorative board main body to which the decorative sheet is pasted and defects due to foreign matter are conspicuous, which is not preferable.

  Moreover, it will not specifically limit if the tensile stress at the time of 5% elongation exists in the range of 25-500 MPa. If the tensile stress is less than 25 MPa, sufficient strength cannot be obtained and there is a risk of fracture. Moreover, when it exceeds 500 Mpa, sufficient adhesive strength with a decorative board main body through an adhesive bond layer is not obtained, and there exists a possibility of peeling.

  The metal thin film layer used in the present invention is not particularly limited as long as it has a metal thin film, and may be a layer made of a metal foil.

  As said metal foil, metal foil which consists of aluminum, chromium, gold | metal | money, silver, copper etc. is mentioned, for example, Aluminum is used suitably from the design property, the ease of a process, economical efficiency, etc.

  In order to obtain a stainless steel design, a metal thin film that has been subjected to hairline processing is preferably used. In particular, an aluminum foil subjected to hairline processing is particularly preferable for obtaining a stainless steel design. The thickness of the metal foil is preferably 5 to 50 μm.

  A printed layer may be provided on the surface of the metal thin film layer for the purpose of further improving the design. This printing layer is a pattern, display, etc. layer, and may be a pattern layer or a solid layer. This printing is performed by a known printing method such as offset printing, gravure printing, letterpress printing, screen printing, etc. Is done. As the ink to be used, a commonly used ink may be used, but in order to increase the metallic effect, a transparent type color ink is preferably used.

  The transparent resin layer used in the present invention is provided to give surface gloss and surface strength. Examples of the film used include polyvinyl chloride, polyvinylidene chloride, polypropylene, polyethylene, polyvinyl alcohol, and polyethylene terephthalate. Examples thereof include plastic films such as polybutylene terephthalate, polycarbonate, nylon, polystyrene, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, and ionomer. Of these, polypropylene film, polyethylene terephthalate, polybutylene terephthalate, polyvinyl chloride film, and the like, which are excellent in transparency, smoothness and gloss, are preferably used. As the thickness of these films, a film having a thickness of 10 to 200 μm is generally used, and preferably 12 to 188 μm.

  In the present invention, it is preferable that a synthetic resin layer having a tensile stress at 5% elongation in the range of 25 to 500 MPa is provided between the polyethylene terephthalate resin layer and the metal foil layer. By providing the synthetic resin layer, the secondary processability is further improved and the thermal deformation can be extremely reduced. The tensile stress at the time of 5% elongation of the synthetic resin layer is preferably 25 to 500 MPa as in the case of the adjacent polyethylene terephthalate resin layer, and more preferably a value close to the tensile stress at the time of 5% elongation of the polyethylene terephthalate layer. If the tensile stress at the time of 5% extension between the synthetic resin layer and the polyethylene terephthalate resin layer is significantly different, it is not preferable because workability is lowered.

  The synthetic resin layer may be used alone or in the form of a sheet or film, or may be used as a laminate by extrusion lamination on a sheet for forming a polyethylene terephthalate resin layer. You may coextrude with a polyethylene terephthalate resin and use it as a laminated body. The thickness of the synthetic resin layer is preferably 0.01 to 5 mm, more preferably 10 to 200 μm, and particularly preferably 20 to 80 μm.

  In the present invention, a surface protective layer may be provided on the surface of the transparent resin layer in order to provide further surface gloss and surface strength. The surface protective layer is preferably a three-dimensional cross-linked cured resin layer for the purpose, and may be a thermosetting resin or an ionizing radiation curable resin.

  Examples of the thermosetting resin include phenol resin, urea resin, diallyl phthalate resin, melamine resin, guanamine resin, unsaturated polyester resin, polyurethane resin (including two-component curable polyurethane), epoxy resin, aminoalkyd resin, Examples include melamine-urea cocondensation resin, silicon resin, polysiloxane resin, and the like. A curing agent such as a crosslinking agent or a polymerization initiator, or a polymerization accelerator may be added to the resin as necessary. For example, as a curing agent, isocyanate or organic sulfonate is added to unsaturated polyester resin or polyurethane resin, organic amine is added to epoxy resin, peroxide such as methyl ethyl ketone peroxide, azoisobutyl nitrile, etc. A radical initiator such as is added to the unsaturated polyester.

  As the ionizing radiation curable resin, specifically, a composition curable by ionizing radiation in which a prepolymer, an oligomer and / or a monomer having a polymerizable unsaturated bond or an epoxy group is appropriately mixed in the molecule. Things are used. Here, the ionizing radiation means an electromagnetic wave or a charged particle beam having an energy quantum capable of polymerizing or cross-linking molecules, and usually an ultraviolet ray or an electron beam is used.

  Examples of the above prepolymers and oligomers include unsaturated polyesters such as unsaturated dicarboxylic acid and polyhydric alcohol condensates, polyester methacrylates, polyether methacrylates, polyol methacrylates, methacrylates such as melamine methacrylates, polyester acrylates, epoxy acrylates, Examples thereof include acrylates such as urethane acrylate, polyether acrylate, polyol acrylate, and melamine acrylate, and a cationic polymerization type epoxy compound.

  Examples of monomers used in ionizing radiation curable resins include styrene monomers such as styrene, 瘁 | methylstyrene, methyl acrylate, 2-ethylhexyl acrylate, methoxyethyl acrylate, butoxyethyl acrylate, butyl acrylate Acrylic esters such as methoxybutyl acrylate and phenyl acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, methoxyethyl methacrylate, ethoxymethyl methacrylate, phenyl methacrylate and lauryl methacrylate , 2- (N, N-diethylamino) ethyl acrylate, 2- (N, N-dimethylamino) ethyl methacrylate, 2- (N, N-dibenzylamino) methyl acrylate, acrylic acid- 2- (N, N-die Substituted amino alcohol esters of unsaturated acid such as tilamino) propyl, unsaturated carboxylic acid amides such as acrylamide and methacrylamide, ethylene glycol diacrylate, propylene glycol diacrylate, propylene glycol diacrylate, neopentyl glycol diacrylate, 1 , 6-hexanediol diacrylate, compounds such as triethylene glycol diacrylate, polyfunctional compounds such as dipropylene glycol diacrylate, ethylene glycol diacrylate, propylene glycol dimethacrylate, diethylene glycol dimethacrylate, and / or 2 in the molecule Polythiol compounds having more than one thiol group, such as trimethylolpropane trithioglycolate, trimethylolpropanthate Thio propylate, pentaerythritol thioglycolate, and the like. Usually, the above compounds are used alone or in combination of two or more as required, but in order to impart ordinary coating suitability to the ionizing radiation curable resin, the prepolymer or polythiol is added in an amount of 5% by weight or more. The monomer and / or polythiol is preferably 95% by weight or less.

  When irradiating with ultraviolet rays to cure the ionizing radiation curable resin, acetophenones, benzophenones, Michler benzoyl benzoate, 瘁 | aminoxime ester, tetramethylthiuram monosulfide, thioxanthones, Aromatic diazonium salts, aromatic sulfonium salts, metallocenes, and n-butylamine, triethylamine, tri-n-butylphosphine and the like can be further mixed and used as a photopolymerization accelerator (sensitizer).

  Spherical particles may be added to the three-dimensional cross-linked cured resin. Examples of the spherical particles include spherical particles made of inorganic materials such as alumina and silica, silicon resins, and organic materials such as crosslinked acrylic resins. Inorganic particles may be treated with an organic acid, a surfactant, a silane coupling agent or the like in order to improve dispersibility. The particle size of the spherical particles is not particularly limited, but usually spherical particles having an average particle size of 3 to 50 μm are used. Moreover, the addition amount of a spherical particle is not specifically limited, Usually, 5-20 weight part is added with respect to 100 weight part of resin components.

In the three-dimensional cross-linked cured resin, as components other than the binder resin and spherical particles, coloring agents such as dyes and pigments, other fillers such as CaCO ₃ , BaSO ₄ , nylon resin beads, antifoaming agents, leveling agents, Additives usually added to paints and inks such as thixotropic agents can be added. In the three-dimensional cross-linked cured resin, in order to adjust the viscosity, a cross-linkable resin component can be dissolved, and a solvent having a boiling point of 70 to 150 at normal pressure is within 30% by weight or less in the composition. Can be used. When the amount of the solvent added is in the range of 30% by weight or less, the drying is smooth and the production speed is not greatly reduced.

  As the solvent, those usually used for paints, inks and the like can be used. Specific examples include aromatic hydrocarbons such as toluene and xylene, ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone, and ethyl acetate. , Acetates such as isopropyl acetate and amyl acetate, alcohols such as methyl alcohol, ethyl alcohol and isopropyl alcohol, ethers such as dioxane, tetrahydrofuran and diisopropyl ether, and mixtures of two or more thereof.

  As a method for forming a three-dimensional cross-linked cured resin layer, 1) a direct coating method in which a coating composition is directly applied, or 2) a resin layer is formed in advance on the surface of a peelable substrate, and then the layer is formed. A transfer coating method or the like is used.

  The direct coating method of 1) above includes gravure coating, gravure reverse coating, gravure offset coating, spinner coating, roll coating, reverse roll coating, kiss coating, wheeler coating, dip coating, silk screen solid coating, wire bar coating, flow coating, A comma coat, a flow coat, a brush coat, a spray coat or the like can be used, but a gravure coat is preferred.

  The ionizing radiation irradiating device used for curing the ionizing radiation curable resin is a light source such as an ultrahigh pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a black light lamp, or a metal halide lamp when irradiating ultraviolet rays. When irradiating with an electron beam, various electron beam accelerators such as a Cockloft Walton type, a bandegraph type, a resonant transformer type, an insulated core transformer type, a linear type, a dynamitron type, and a high frequency type are used.

The irradiation amount of an electron beam is usually 100 to 1000 keV, preferably 100 to 300 keV. The electron beam is irradiated at an irradiation amount of about 0.1 to 30 Mrad. If the irradiation amount is less than 0.1 Mrad, curing may be insufficient, and if the irradiation amount exceeds 30 Mrad, the cured coating film or substrate may be damaged. Moreover, the irradiation amount in the case of hardening with ultraviolet rays is preferably 50 to 1000 mJ / cm ² . This is because if the irradiation amount of ultraviolet rays is less than 50 mJ / cm ² , curing may be insufficient, and if the irradiation amount exceeds 1000 mJ / cm ² , the cured coating film may change yellow.

  In order to give a metallic pattern or pattern, it is preferable that the metal foil layer is an embossed metal foil. In this case, the synthetic resin layer enters the unevenness caused by the embossing of the metal foil, It is desirable that it also serves as a shape-retaining role.

  If it does in this way, since the unevenness | corrugation of metal foil is shape-retained from at least a back surface, the external appearance of an uneven | corrugated pattern can be maintained effectively. Moreover, since such a polyethylene terephthalate resin layer and a synthetic resin layer can act as a cushion between a decorative board main body and a metal foil layer, when there is unevenness | corrugation etc. in a decorative board main body, it does not pick up this A metal foil can be suitably bonded to the decorative plate body via a polyethylene terephthalate resin layer or a synthetic resin layer.

  The present invention also includes an adhesive that serves to retain the shape by entering the unevenness generated by the embossing on at least the upper surface of the embossed metal foil layer regardless of the presence or absence of the synthetic resin layer. It is effective to provide a shape-retaining layer.

  If embossing is performed on the metal foil layer in this way, sharp irregularities can appear in the metal foil layer, and the design deterioration as when the hairline processing is applied to the film layer can be reduced. It can be effectively avoided.

  In addition, since the shape-retaining layer made of an adhesive also serves as a shape-retaining function against irregularities, the irregularities are not easily crushed by external pressure or the like, and the original appearance of the irregular pattern can be effectively maintained over a long period of time.

  Further, since the embossing is simultaneously performed on each part of the metal foil layer in a short time, there is a low possibility that a problem is caused by interruption of the processing or the like as compared with the case that requires a time difference such as hairline processing.

  Specifically, at least the upper surface of the embossed metal foil layer is provided with a shape-retaining layer made of an adhesive that also functions to retain the shape by entering the unevenness caused by the embossing, and the shape-retaining layer What provided the transparent resin layer in the upper layer side through the thermoplastic film layer is preferable.

  In this case, in addition to the above-described effects, it is possible to avoid a situation in which the design property is lowered by providing the unevenness only on the aluminum foil located in the deep layer and not on the thermoplastic film layer and the surface coating layer.

  In the above, in the present invention, a print coating layer may be provided between the shape-retaining layer and the thermoplastic film layer positioned on the upper layer side of the metal foil layer. A variety of design effects can be brought about by the combination of the uneven pattern by the metal foil layer and the pattern by the printed coating layer. The configuration in which a print coating layer is provided between the transparent resin layer and the thermoplastic film layer on the upper side of the metal foil layer is also the same.

  Of course, if the transparent resin layer also serves as a print coating layer, one layer can be reduced, so that even if the design effect is the same, it is effective to simplify the process.

  The present invention has a special effect especially when embossing is made in a hairline style. That is, in order to eliminate the problems caused by the conventional hairline processing, it is considered as one means to switch the object of the hairline processing from the film layer to the metal foil layer, but when the metal foil is extremely thin, The metal foil layer may be crushed. In contrast, if embossing is used to artificially form irregularities with a hairline tone, dust and scratches do not occur, the metal foil is less likely to break, and the appearance is the same as that of the hairline processing. The appearance can be effectively realized.

  And as above-mentioned, the decorative board of this invention is a base material in the decorative board of this invention, although the surface is laminated | stacked on the decorative board main body which the surface consists of hard resin through an adhesive bond layer. The decorative board body is made of ABS resin, polycarbonate resin, PP, PS, PE, PO, PMMA, PVC, polyethylene terephthalate, ie PET, and other surface materials such as household appliances, kitchen doors, storage doors, such as TVs and refrigerators. Anything used in a housing can be suitably applied.

  On the other hand, a known adhesive material can be used for the adhesive layer as long as sufficient adhesive strength is obtained with respect to the above-described decorative plate body. For example, acrylic, polyester, polyurethane, and epoxy adhesive materials can be used. Among them, a two-component curing type polyurethane adhesive material having a high coating cohesive force can be preferably used. Also, the coating method can be appropriately selected depending on the coating liquid viscosity of the adhesive material, etc., but the coating amount may be appropriately determined in consideration of adhesive strength, cost, etc., but a coating amount as low as possible is preferable.

  Thus, the manufactured metallic decorative board of the present invention has high design properties and can be used for housing interiors, surface materials for refrigerator doors, kitchen doors, posters, labels, packages, displays, and the like.

  According to the present invention, by applying a metallic decorative sheet having a configuration in which a polyethylene terephthalate resin layer, an embossed metal foil layer, and a transparent resin layer are provided in this order, a metallic tone excellent in design is maintained. However, the decorative board on which the decorative sheet is laminated is a decorative board having excellent processability. In particular, by providing a polyethylene terephthalate resin that can be suitably applied to a wide variety of existing adhesives, it is possible to provide an excellent decorative board with further improved adhesion to a decorative board body made of a hard resin. It becomes possible.

The typical sectional view showing the metallic tone decorative sheet concerning a 1st embodiment of the present invention. The typical sectional view showing the metallic tone decorative sheet concerning a 2nd embodiment of the present invention. The figure which shows the modification of FIG. The figure which shows the other modification of FIG.

Embodiments of the present invention will be described below with reference to the drawings.

<First Embodiment>
The decorative board B according to the present embodiment is obtained by attaching a metal-like decorative sheet A, which will be described in detail later, to a decorative board main body 9 via an adhesive layer 8.

  In this embodiment, the decorative sheet main body 9 uses, as an example, an ABS resin that is a hard resin. However, the material used for the decorative board main body is not limited to the ABS resin, and other various hard resins such as polycarbonate resin, PP, PS, PE, PO, PMMA, PVC and polyethylene terephthalate, that is, PET, It can be suitably applied if it is used for surface materials such as home appliances, kitchen doors, storage doors, etc., for example, housings such as televisions and refrigerators.

  In this embodiment, the pressure-sensitive adhesive layer 8 uses a two-component curable polyurethane adhesive having a high coating cohesive force, but is not limited to the adhesive. For example, various existing adhesives using acrylic, polyester, polyurethane, and epoxy adhesive materials can be applied.

  Here, the metallic decorative sheet A according to the present embodiment is composed of polyethylene terephthalate as a main component, a polyethylene terephthalate resin layer 1 having a tensile stress of 25 to 500 MPa at 5% elongation, and a metal foil layer obtained by embossing a metal foil. The aluminum foil 2 and the transparent resin layer 3 are provided in this order.

  Hereinafter, the configuration of the metallic decorative sheet A will be described in detail.

  A metallic decorative sheet A schematically shown in FIG. 1 is provided with a transparent resin layer 3 on the upper surface of a thermoplastic film 6 made of polyester or the like, and a shape-retaining layer made of an adhesive via a printed coating layer 7 on the lower surface. 5 is bonded to the upper surface of an aluminum foil 2 that is a metal thin film embossed in a hairline tone, and the polyethylene terephthalate resin layer 1 is attached to the lower surface of the aluminum foil 2 via a polypropylene-based synthetic resin layer 4. Is provided.

  Alternatively, the transparent resin layer 3 is provided on the upper surface of the thermoplastic film 6 made of polyester or the like, and the first shape-retaining layer 5a made of an adhesive shown in parentheses in the figure is provided on the lower surface. Adhering to the upper surface of the embossed aluminum foil 2, the lower surface of the aluminum foil 2 is provided with a polyethylene terephthalate resin layer 1 through a second shape-retaining layer 5 b made of an adhesive also shown in parentheses, and a print coating layer A configuration in which 7 is omitted is also possible. Of course, the printing coating layer 7 can be omitted by performing an appropriate printing process on the transparent resin layer.

  More specifically, this metallic decorative sheet A is transparent on the upper side of the thermoplastic film 6 having a thickness of 25 to 75 μm and having a thickness of 12 to 188 μm having chemical resistance, abrasion resistance, gloss and matting effect. A resin layer 3 is provided. Moreover, as shown in the figure, the metallic coating sheet A having a desired design can be applied by providing a print coating layer 7 having a thickness of 1 to 3 μm on the upper surface of the thermoplastic film 6 as required.

  In this embodiment, an aluminum foil 2 embossed in a hairline tone having a thickness of 9 to 25 μm is formed on the lower surface of the thermoplastic film 6 having such a configuration. By covering the pattern with a shape-retaining layer 5 made of a two-component curable adhesive having a thickness of 3 to 10 μm, a stable three-dimensional design is ensured.

  Then, on the lower surface of the aluminum foil 2, for example, from biaxially stretched polyethylene terephthalate having a thickness of 50 to 100 μm via the second shape-retaining layer 5 b (or the synthetic resin layer 4) made of a two-component curable adhesive. When the polyethylene terephthalate resin layer 1 is provided and bonded to the decorative board main body 9 made of a hard resin via the adhesive layer 8, the adhesive strength with the decorative board main body 9 is suitably maintained. Although not shown in the present embodiment, a primer layer may be further provided on the lower surface of the polyethylene terephthalate layer for better adaptation to the adhesive layer 8.

  According to such a configuration, through the hairline embossing process on the aluminum foil 2, the design is excellent, the appearance quality of the hairline tone is stable, the scratches are not generated, and the productivity can be provided at low cost. None, a metallic decorative sheet A having excellent adhesion strength is obtained. In addition, since the polyethylene terephthalate resin layer is suitably bonded to various existing adhesive materials, the polyethylene terephthalate resin layer can be bonded with sufficient strength to the adhesive layer 8 that can be preferably bonded to the decorative board body 9. Therefore, it becomes possible to improve the quality of the final product surely by further simplifying the application work of the adhesive of the person who uses this metallic decorative sheet A.

<Second Embodiment>
FIG. 2 shows a minimum configuration that simultaneously realizes improvement of adhesion to the decorative board main body 9 and, more specifically, an adhesive layer 8 and formation of a metallic design pattern having high design properties through the adhesive layer 8. Is. That is, the metal-like decorative sheet A1 in the figure is basically disposed on the lower surface side of the embossed aluminum foil 2, although appropriate layers may be interposed between the layers 1, 2, and 3 as necessary. The polyethylene terephthalate resin layer 1 is located, and the transparent resin layer 3 is located on the upper surface side. As long as this positional relationship is maintained and the hairline embossing process is performed on the aluminum foil 2 described above, the design is excellent, the quality of the hairline tone appearance is stable, and no scratches occur. Can be provided at low cost, and a metallic decorative sheet A1 having excellent adhesion strength can be obtained. Further, since the polyethylene terephthalate resin layer 1 can be suitably bonded to the adhesive layer 8 as shown in the first embodiment, the quality of the final product can be reliably improved.

  Based on the configuration of FIG. 2, a synthetic resin layer (preferably a polypropylene resin layer) 4 or an adhesive is used so that the aluminum foil 2 and the polyethylene terephthalate resin layer 1 are filled with irregularities by embossing the aluminum foil 2. 3 in which the shape-retaining layer 5 made of an agent is provided, or the structure in FIG. 4 in which the shape-retaining layer 5 is provided between the aluminum foil 2 and the transparent resin layer 3, in combination with appropriate layers. Can be configured. When the shape-retaining layer 5 is provided, it is formed so as to fill the embossed irregularities generated on the upper surface of the aluminum foil 2.

  Although the embodiment of the present invention has been described above, the specific configuration of each unit is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

1 ... Polyethylene terephthalate layer 2 ... Metal foil layer (aluminum foil)
DESCRIPTION OF SYMBOLS 3 ... Transparent resin layer 4 ... Synthetic resin layer 5 ... Shape retention layer 5a ... Shape retention layer (1st shape retention layer)
5b ... Shape retention layer (second shape retention layer)
DESCRIPTION OF SYMBOLS 6 ... Thermoplastic film 7 ... Print coating layer 8 ... Adhesive layer 9 ... Cosmetic board main body A, A1 ... Metal-like decorative sheet B ... Cosmetic board

Claims (12)

  A polyethylene terephthalate resin layer containing polyethylene terephthalate as a main component and having a tensile stress of 25 to 500 MPa at 5% elongation, a metal foil layer embossed with metal foil, and a transparent resin layer are provided in this order. A metallic decorative sheet.   The metallic decorative sheet according to claim 1, wherein a synthetic resin layer having a tensile stress of 25 to 500 MPa at 5% elongation is provided between the polyethylene terephthalate resin layer and the metal foil layer.   The metallic decorative sheet according to claim 2, wherein the synthetic resin layer is a polypropylene resin layer.   4. The metal-like decorative sheet according to claim 1, wherein a shape-retaining layer made of an adhesive for retaining the shape of the metal foil layer is provided on the upper surface of the metal foil layer.   5. The metallic decorative sheet according to claim 4, wherein a transparent resin layer is provided on the upper layer side of the shape-retaining layer via a thermoplastic film layer.   6. The metallic decorative sheet according to claim 5, wherein a printed coating layer is provided between the shape retaining layer and the thermoplastic film layer on the upper side of the metal foil layer.   6. A metallic decorative sheet according to claim 5, wherein a print coating layer is provided between the transparent resin layer and the thermoplastic film layer on the upper side of the metal foil layer.   The metallic decorative sheet according to claim 1, 2, 3, 4, or 5, wherein the transparent resin layer also serves as a print coating layer.   The metallic decorative sheet according to claim 1, 2, 3, 4, 5, 6, 6, 7 or 8, wherein the embossing is a hairline.   The metal-like decorative sheet according to claim 1, 2, 3, 4, 5, 6, 7, 8 or 9, wherein the metal foil layer is an aluminum foil and the embossing is a hairline-like one.   The metal-tone decorative sheet according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10, wherein the polyethylene terephthalate resin layer is biaxially stretched polyethylene terephthalate.   12. A decorative board comprising the metallic decorative sheet according to claim 1 laminated on a decorative board main body having a surface made of a hard resin with an adhesive layer interposed therebetween.