Decorative metal plate

Abstract

To provide a decorative metal plate which can simply and largely suppress various appearance defects of a surface at low cost.SOLUTION: In a decorative metal plate 10 having a base material 11 which is made of metal and has a plate shape, a substrate layer 13 provided on the surface side of the base material 11, a colored layer 14 provided on the surface side of the substrate layer 13, a pattern layer 15 provided on the surface side of the colored layer 14, and a surface protective layer 16 provided on the surface side of the pattern layer 15, the surface protective layer 16 contains a resin material containing at least one of a polyester-based resin and an acrylic resin, a first matte additive agent having an average particle diameter of 1 μm or more and 5 μm or less, and a second matte additive agent having an average particle diameter of more than 5 μm and 10 μm or less, and has thickness of 6 μm or more and 12 μm or less.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a decorative metal plate having a pattern or the like printed on the surface of a metal plate material.

Background Art

[0002] Decorative metal plates with patterns or the like printed on the surface of metal plate materials are widely used in various applications, including building materials such as doors, shutters, and siding for buildings, and surface materials for home appliances. Such decorative metal plates are formed by providing a base coloring layer via an underlayer on the surface of a plate-shaped metal substrate on which a chemical conversion film is formed, and then printing a pattern layer on the coloring layer. Then, a paint of a material for surface protection is applied on the pattern layer and dried to form a surface protection layer, thereby manufacturing the decorative metal plate.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the decorative metal plate as described above, when applying the paint, a method using a roll coater (for example, the gravure offset printing method, etc.) is mainly applied. When applying the paint using such a roll coater, streak patterns and uneven gloss along the rotation direction of the roll are likely to occur when applying from the roll, and there is a risk of causing defects such as poor appearance.

[0005] Therefore, for example, it is conceivable to ensure the leveling property of the coating film by adding a leveling agent to the paint. However, when a leveling agent is added to the paint, the paint is likely to foam, and there is a risk of causing new appearance defects due to the bouncing of the bubbles. Therefore, it is also conceivable to further add an antifoaming agent, but these additives are likely to bleed to the surface of the coating film and may cause new appearance defects. In particular, when enhancing the distinctness of image on the surface, it is necessary to greatly suppress various appearance defects as described above.

[0006] In view of the above, an object of the present invention is to provide a decorative metal plate capable of easily and greatly suppressing various surface appearance defects at low cost.

Means for Solving the Problems

[0007] The decorative metal plate according to the present invention for solving the above-described problems includes a base material having a plate shape made of metal, an underlayer provided on the surface side of the base material, a colored layer provided on the surface side of the underlayer, a pattern layer provided on the surface side of the colored layer, and a surface protection layer provided on the surface side of the pattern layer. In the decorative metal plate, the surface protection layer contains a resin material containing at least one of a polyester resin and an acrylic resin, a first matting additive having an average particle size of 1 μm or more and 5 μm or less, and a second matting additive having an average particle size of more than 5 μm and 10 μm or less, and has a thickness of 6 μm or more and 12 μm or less.

[0008] Further, in the decorative metal plate according to the present invention, in the above-described decorative metal plate, it is preferable that the surface protection layer contains 0.5 part by mass or more and 5 parts by mass or less of the first matting additive and 10 parts by mass or more and 20 parts by mass or less of the second matting additive with respect to 100 parts by mass of the resin material.

[0009] Further, in the decorative metal plate according to the present invention, it is preferable that the first matting additive is at least one of silica and acrylic resin beads, and the second matting additive is acrylic resin beads in the above-described decorative metal plate.

[0010] Further, in the decorative metal plate according to the present invention, it is preferable that a back coating layer is provided on the back surface side of the base material in the above-described decorative metal plate.

[0011] Further, in the decorative metal plate according to the present invention, it is preferable that a chemical conversion coating layer is provided on the front and back surfaces of the base material in the above-described decorative metal plate.

[0012] Further, in the decorative metal plate according to the present invention, it is preferable that the base material is one in which metal coatings are formed on the front and back surfaces of a steel plate in the above-described decorative metal plate.

Advantages of the Invention

[0013] According to the decorative metal plate of the present invention, the surface protective layer contains a resin material containing at least one of a polyester resin and an acrylic resin, a first matting additive having an average particle size of 1 μm or more and 5 μm or less, and a second matting additive having an average particle size of more than 5 μm and 10 μm or less, and has a thickness of 6 μm or more and 12 μm or less. Therefore, the occurrence of streak patterns and gloss unevenness is suppressed, and a leveling agent and an antifoaming agent are not required, so that various surface appearance defects can be easily and greatly suppressed at low cost.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Embodiments for Carrying Out the Invention

[0015] An embodiment of the decorative metal plate according to the present invention will be described with reference to the drawings. Note that the present invention is not limited only to the following embodiments described with reference to the drawings, and various technical matters described in each embodiment can be appropriately combined or replaced as needed.

[0016] [Main Embodiments] The main embodiments of the decorative metal plate according to the present invention will be described with reference to FIGS. 1 and 2.

[0017] 〈Overall Configuration of Decorative Metal Plate〉 As shown in FIG. 1, chemical conversion coating layers 12 are provided on the front surface (the upper surface in FIG. 1) and the back surface (the lower surface in FIG. 1) of a base material 11 having a plate shape made of metal. A base layer 13 is provided on the surface (the upper surface in FIG. 1) of the chemical conversion coating layer 12 on the front surface side of the base material 11. A colored layer 14 is provided on the surface (the upper surface in FIG. 1) of the base layer 13. A pattern layer 15 is provided on the surface (the upper surface in FIG. 1) of the colored layer 14. A transparent surface protection layer 16 is provided on the surface (the upper surface in FIG. 1) of the pattern layer 15. Further, a back surface coating layer 17 is provided on the back surface (the lower surface in FIG. 1) of the chemical conversion coating layer 12 on the back surface side of the base material 11. Such a decorative metal plate 10 according to the present embodiment will be described in more detail.

[0018] 〈Base Material 11〉 The base material 11 is a metal material having a plate shape, and its thickness is 0.25 mm or more and 6 mm or less. Examples of the metal material include a steel plate and an aluminum plate. It is preferable that a metal coating is formed on the front and back surfaces of the steel plate in order to improve adhesion and corrosion resistance. The total thickness of the metal coating on both sides is 8 μm or more and 110 μm or less, and it can be formed by various plating methods such as hot-dip galvanizing, electro-galvanizing, and alloy plating.

[0019] 〈Chemical Conversion Coating Layer 12〉 The chemical conversion coating layer 12 is provided on the front and back surfaces of the base material 11 by chemical conversion treatment in order to improve the white rust resistance of the base material 11, and its amount is 50 mg / m 2 or more and 150 mg / m 2It is as follows. Examples of the chemical conversion treatment include chromate treatment, chromium-free treatment, etc. In particular, chromium-free treatment is very preferable because it can reduce the environmental load. By this chromium-free treatment (non-chromate treatment), a chemical conversion coating layer 12 of a chromium-free coating (non-chromate coating) can be formed.

[0020] Examples of the treatment liquid used in the chromium-free treatment include a treatment liquid not containing hexavalent chromium, for example, a zinc phosphate treatment liquid, a treatment liquid containing Zr or Ti or salts of both of them, or a treatment liquid containing a silane coupling agent, etc. By the chromium-free treatment using such a treatment liquid, a chromium-free chemical conversion coating containing Ti, Zr, P, Ce, Si, Al, Li, etc. as main components and not containing chromium can be formed on the metal coating of the plating. That is, the chromium-free chemical conversion coating contains, for example, Ti, Zr, P, Ce, Si, Al or Li or any combination thereof.

[0021] 〈Underlayer 13〉 The underlayer 13 is provided to improve the adhesion between the base material 11 (chemical conversion coating layer 12) and the coloring layer 14 and the corrosion resistance of the base material 11, and has a thickness of 1 μm or more and 15 μm or less. Examples of the material of the underlayer 13 include known resin coatings for the underlayer containing epoxy resins, polyester resins, urethane resins, melamine resins, alkyd resins, phenolic resins, acrylic resins, etc. The underlayer 13 can also contain a rust preventive pigment for further improving the corrosion resistance.

[0022] 〈Coloring layer 14〉 The coloring layer 14 is provided to impart a base color to the pattern of the pattern layer 15, and has a thickness of 10 μm or more and 30 μm or less. Examples of the material of the coloring layer 14 include known resin coatings for coloring containing a binder resin made of polyester resins, melamine resins, urethane resins, epoxy resins, alkyd resins, phenolic resins, acrylic resins, etc. and a pigment of the base color.

[0023] The coloring layer 14 preferably contains at least one of an ultraviolet absorber (UVA) and a light stabilizer (HALS) in order to improve weather resistance. The UVA and HALS are preferably contained in the range of 0.5% by mass or more and 1.5% by mass or less, respectively, based on the total mass of the coloring layer 14. Examples of the UVA include hydroxyphenyltriazine-based compounds, etc., and examples of the HALS include N-OR type hindered amine-based compounds, etc.

[0024] The coloring layer 14 preferably further contains an antioxidant. The antioxidant is preferably contained in the range of 0.5% by mass or more and 1.5% by mass or less based on the total mass of the coloring layer 14. Examples of the antioxidant include hindered phenol-based compounds, etc. Examples of the hindered phenol-based compounds include pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], 2,2-thiodiethylene bis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], etc. From the viewpoint of weather resistance, the addition ratio of the antioxidant and HALS is preferably 1:2.

[0025] <Pattern layer 15> The pattern layer 15 is provided to impart design properties by the pattern and has a thickness of 0.1 μm or more and 3 μm or less. Examples of the material of the pattern layer 15 include inks or paints in which colorants such as pigments and dyes are dissolved or dispersed in a diluent together with a binder resin. Examples of the binder resin include known binder resins for patterns of the types mentioned in the description of the underlayer 13 above. Examples of the pigment include titanium oxide, zinc white, carbon black, iron composite oxides, iron oxide, organic pigments, metallic pigments, pearl pigments, etc. In particular, iron composite oxides are used as heat shielding pigments.

[0026] The pattern layer 15 is formed with a pattern by being printed with ink by various printing methods such as a gravure printing method, an offset printing method, an inkjet printing method, etc., or by applying a paint by various coating methods such as a gravure coating method, a roll coating method, etc. In the case of the inkjet printing method, the thickness of the pattern layer 15 becomes thicker than the above-described range. Examples of the pattern include a wood grain pattern, a stone grain pattern, a cloth grain pattern, an abstract pattern, a geometric pattern, letters, symbols, a single-color plain surface, etc., or a combination of two or more of these, but the pattern is not limited thereto.

[0027] 〈Surface protection layer 16〉 The surface protection layer 16 is provided to impart weather resistance, bendability, scratch resistance, cleanability, etc., and has a thickness of 6 μm or more and 12 μm or less. If it is less than 6 μm, streak patterns and gloss unevenness will occur, and if it exceeds 12 μm, cracks will occur when bent.

[0028] The surface protection layer 16 contains a main component made of a resin material containing at least one of a polyester-based resin and an acrylic-based resin, and sub-components such as inorganic-based ones like silica and organic-based matting additives like resin beads. The surface protection layer 16 preferably further contains weathering additives such as UVA, HALS, and antioxidants as sub-components.

[0029] The matting additive contains a first matting additive having an average particle size of 1 μm or more and 5 μm or less, and a second matting additive having an average particle size of more than 5 μm and 10 μm or less. The first matting additive is composed of at least one of acrylic resin beads and silica, and is 0.5 part by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the resin material. The second matting additive is preferably composed of acrylic resin beads and is 10 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the resin material. If the content of the first matting additive and the second matting additive is less than the above lower limit value, it is difficult to exhibit sufficient gloss, which is not preferable, and if the content is more than the above upper limit value, streak patterns are likely to occur, which is not preferable.

[0030] The average particle size can be determined from the value at 50% of the integrated value in the particle size distribution measured in accordance with the laser diffraction / scattering method specified in Japanese Industrial Standard "JIS Z 8825".

[0031] As UVA, for example, it is preferable to use in combination two types of hydroxyphenyltriazine-based compounds having different maximum absorption wavelengths, because a synergistic effect can be exhibited to achieve higher weather resistance. As the two types of hydroxyphenyltriazine-based UVA, for example, it is preferable to apply a first ultraviolet absorber having a maximum absorption wavelength of 330 nm or more and 340 nm or less, and a second ultraviolet absorber having a maximum absorption wavelength of 315 nm or more and 325 nm or less. The first ultraviolet absorber and the second ultraviolet absorber are preferably contained within the range of 2.0% by mass or more and 5.0% by mass or less, respectively, based on the total mass of the surface protective layer 16, and more preferably within the range of 1.0% by mass or more and 3.0% by mass or less.

[0032] Examples of HALS include N-OR type hindered amine-based compounds. Examples of hindered amine-based compounds include bis(2,2,6,6-tetramethyl-1-(octyloxy)-4-piperidinyl) decanedioate, 2,4-bis[N-butyl-N-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidin-4-yl)amino]-6-(2-hydroxyethylamino)-1,3,5-triazine, and the like. HALS is preferably contained within the range of 1.0% by mass or more and 3.0% by mass or less based on the total mass of the surface protective layer 16.

[0033] Examples of the acid inhibitor include hindered phenols. Examples of the hindered phenols include pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], 2,2-thiodiethylene bis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], and the like. The antioxidant is preferably contained in the range of 1.0% by mass or more and 3.0% by mass or less based on the total mass of the surface protection layer 16. From the viewpoint of weather resistance, the addition ratio of the antioxidant and HALS is preferably 1:2.

[0034] The surface protection layer 16 is formed by drying and curing a paint in which the main component of the resin material described above and auxiliary components such as a matting additive and a weather resistance additive are dispersed in a dispersion medium. The dispersion medium is a liquid capable of dispersing the main component and the auxiliary components described above. The boiling point of the dispersion medium is preferably 100°C or higher and 290°C or lower (particularly 108°C or higher and 210°C or lower). If the boiling point is less than 100°C, it is likely to volatilize and difficult to apply. If it exceeds 290°C, it is difficult to volatilize and requires time for drying and curing, which is not preferable. Examples of such a dispersion medium include high-boiling aromatic naphtha, ethylbenzene, xylene, isobutyl alcohol, etc. Among them, high-boiling aromatic naphtha is particularly preferable.

[0035] 〈Back coating layer 17〉 The back coating layer 17 is provided to protect the back surface of the base material 11 (chemical conversion coating layer 12) from corrosion and the like, and has a thickness of 2 μm or more and 8 μm or less. Examples of the material of the back coating layer 17 include known resin paints for coating such as those described in the explanation of the underlayer 13 above. The back coating layer 17 can also contain a rust preventive pigment for further improving corrosion resistance.

[0036] 〈Manufacturing method of the decorative metal sheet 10〉 The manufacturing method of the decorative metal sheet 10 according to this embodiment will be described based on FIG. 2.

[0037] First, after obtaining the base material 11 by plating a steel sheet to form a metal film on both the front and back surfaces (base material forming step S11), a chemical conversion treatment such as a non-chromate treatment is applied to the base material 11 to form a chemical conversion coating layer 12 on both the front and back surfaces of the base material 11 (chemical conversion coating layer forming step S12). Next, after applying a base resin paint on the chemical conversion coating layer 12 on the surface side of the base material 11 and drying and curing it to provide a base layer 13 (base layer forming step S13), a coloring resin paint is applied on the surface of the base layer 13 and dried and cured to provide a coloring layer 14 (coloring layer forming step S14). Subsequently, a pattern ink or paint is printed or applied on the surface of the coloring layer 14 and dried and cured to provide a pattern layer 15 (pattern layer forming step S15).

[0038] Then, a paint prepared by dispersing the main component and the auxiliary component of the resin material for surface protection in a dispersion medium at the above-mentioned ratio is applied on the surface of the pattern layer 15 by a method using a roll coater such as gravure offset printing and dried and cured to provide a surface protection layer 16 having a thickness of 6 μm or more and 12 μm or less (surface protection layer forming step S16). Finally, a coating resin paint is applied on the chemical conversion coating layer 12 on the back side of the base material 11 and dried and cured to provide a back coating layer 17 (back coating layer forming step S17), whereby the decorative metal plate 10 according to the present embodiment can be obtained.

[0039] In such a decorative metal plate 10 according to the present embodiment, even when a paint is applied from a roll coater such as gravure offset printing, the generation of streak patterns and gloss unevenness along the rotation direction of the roll can be suppressed, and a leveling agent and an antifoaming agent become unnecessary.

[0040] Therefore, according to the decorative metal plate 10 according to the present embodiment, various surface appearance defects can be easily and greatly suppressed at low cost, and the distinctness of image of the surface can be easily improved.

[0041] [Other Embodiments] In addition, for example, when the pattern of the pattern layer 15 is a wood grain, it is more preferable to print a matte layer of the pattern of the conduit on the pattern layer 15 and provide it between the pattern layer 15 and the surface protection layer 16, so that the design property can be further improved.

Example

[0042] Examples of the decorative metal plate according to the present invention will be specifically described, but the present invention is not limited only to the following examples specifically described.

[0043] [Preparation of test specimens and comparative specimens] 〈Test Specimen 1〉 First, a steel plate with a thickness of 0.4 mm conforming to Japanese Industrial Standard "JIS G 3302" was prepared, and this steel plate was subjected to hot-dip galvanization to form a zinc metal coating (total thickness of both sides: 26 μm) on the front and back surfaces of the steel plate, thereby obtaining a base material (base material forming step). Subsequently, the base material was subjected to a non-chromate treatment to form a non-chromate chemical conversion coating layer (86 mg / m 2 ) on the front and back surfaces of the base material (chemical conversion coating layer forming step).

[0044] Next, a polyester-based resin paint was applied on the chemical conversion coating layer on the surface side of the base material and dried and cured to provide an underlayer (thickness: 1.5 μm) (underlayer forming step). Then, a polyester-based resin paint containing an inorganic pigment and a weathering agent was applied on the surface of the underlayer and dried and cured to provide a colored layer (thickness: 15 μm) (colored layer forming step).

[0045] Subsequently, an ink for patterns obtained by mixing a polyester-based binder resin and an inorganic pigment was printed on the surface of the colored layer by the gravure offset printing method and dried and cured to provide a pattern layer (thickness: 1 μm) (pattern layer forming step).

[0046] Then, with respect to 100 parts by mass of the polyester resin for surface protection, 0.5 part by mass of silica with an average particle diameter of 4 μm, 4.1 parts by mass of acrylic resin beads with an average particle diameter of 5 μm, and 17.3 parts by mass of acrylic resin beads with an average particle diameter of 8 μm are mixed and dispersed in a dispersion medium at a ratio to prepare a paint. This paint is applied onto the surface of the pattern layer 15 from a gravure offset printing method, through a roll coater, from a solid gravure plate, and dried and cured to provide a surface protection layer with a thickness of 8 μm (surface protection layer forming step). Thereby, a test piece 1 of a decorative metal plate was obtained.

[0047] 〈Test piece 2〉 In the surface protection layer forming step, a test piece 2 of a decorative metal plate was obtained by making it the same as test piece 1 except that the amount of acrylic resin beads with an average particle diameter of 8 μm was 11.0 parts by mass.

[0048] 〈Test piece 3〉 In the surface protection layer forming step, a test piece 3 of a decorative metal plate was obtained by making it the same as test piece 1 except that the amount of acrylic resin beads with an average particle diameter of 8 μm was 19.5 parts by mass.

[0049] 〈Test piece 4〉 In the surface protection layer forming step, a test piece 4 of a decorative metal plate was obtained by making it the same as test piece 1 except that the paint was applied so that the thickness of the surface protection layer was 6 μm.

[0050] 〈Test piece 5〉 In the surface protection layer forming step, a test piece 5 of a decorative metal plate was obtained by making it the same as test piece 1 except that the paint was applied so that the thickness of the surface protection layer was 12 μm.

[0051] 〈Comparative piece 1〉 In the surface protection layer forming step, a comparative piece 1 of a decorative metal plate was obtained by making it the same as test piece 1 except that the amount of acrylic resin beads with an average particle diameter of 8 μm was 7.5 parts by mass.

[0052] 〈Comparative piece 2〉 In the surface protective layer forming step, a comparative body 2 of the decorative metal plate was obtained by making it the same as Test Specimen 1 except that 25.0 parts by mass of acrylic resin beads with an average particle size of 8 μm were used.

[0053] 〈Comparative Body 3〉 In the surface protective layer forming step, a comparative body 3 of the decorative metal plate was obtained by making it the same as Test Specimen 1 except that the paint was applied so that the thickness of the surface protective layer was 4 μm.

[0054] 〈Comparative Body 4〉 In the surface protective layer forming step, a comparative body 4 of the decorative metal plate was obtained by making it the same as Test Specimen 1 except that the paint was applied so that the thickness of the surface protective layer was 15 μm.

[0055] [Evaluation Test Method] 〈Evaluation of Stripe Pattern〉 The surfaces (surface protective layers) of Test Specimens 1 to 5 and Comparative Bodies 1 to 4 were visually inspected to evaluate the state of the stripe pattern. The results are shown in Table 1. In Table 1, "○" indicates that almost no stripe pattern was confirmed, "△" indicates that a slight stripe pattern was confirmed, and "×" indicates that a clear stripe pattern was confirmed.

[0056] 〈Gloss Measurement〉 Using a spectrophotometer "ROYPOINT IQ (trade name)" manufactured by Konica Minolta Inc., the glossiness (60°) of the surfaces of Test Specimens 1 to 5 and Comparative Bodies 1 to 4 (surface protective layers) was measured. The results are shown in Table 1 below. In Table 1, "○" indicates that the glossiness was 14 or less, and "×" indicates that the glossiness was 15 or more.

[0057] 〈Bending Process Test〉 For Test Specimens 1 to 5 and Comparative Specimens 1 to 4, a 180° bending test (hemming bending test) was conducted in accordance with Japanese Industrial Standard "JIS Z2248". Specifically, in an environment of 23°C, 0T bending (tight bending) was performed so that it would adhere closely without gaps when bent at 180°, and the presence or absence of cracks in the bent portion was visually confirmed. The results are shown in Table 1 below. In Table 1, "○" indicates that no cracks were observed, and "×" indicates that cracks were observed.

[0058] [Evaluation Test Results] The results of the evaluation tests for Test Specimens 1 to 5 and Comparative Specimens 1 to 4 are shown in Table 1 below.

[0059]

Table 1

[0060] As can be seen from Table 1, in Comparative Specimen 1 where the acrylic resin beads with an average particle size of 8 μm were less than 10% by mass, the glossiness was "×", and in Comparative Specimen 2 where the acrylic resin beads with an average particle size of 8 μm exceeded 20% by mass, the streak pattern was "×". Also, in Comparative Specimen 3 where the thickness of the surface protective layer was less than 6 μm, the streak pattern and glossiness were "×". In addition, in Comparative Specimen 4 where the thickness of the surface protective layer exceeded 12 μm, the bending process was "×". Therefore, the comprehensive evaluation of Comparative Specimens 1 to 4 was "×".

[0061] On the other hand, in Test Specimens 1 to 5, in terms of any of the streak pattern, glossiness, and bending process, it was "○", and the comprehensive evaluation was "○".

[0062] From the above, it was recognized that the present invention can easily and greatly suppress various appearance defects on the surface at low cost.

Industrial Applicability

[0063] The decorative metal plate according to the present invention can easily and greatly suppress various appearance defects on the surface at low cost, so it can be extremely beneficially used in various industries including the construction industry.

Explanation of Signs

[0064] 10 Decorative metal plate 11 Base material 12 Chemical conversion coating layer 13 Underlayer 14 Coloring layer 15 Pattern layer 16 Surface protection layer 17 Back surface coating layer

Claims

1. A base material having a plate shape made of metal, An underlayer provided on the surface side of the base material, A colored layer provided on the surface side of the underlayer, A pattern layer provided on the surface side of the colored layer, A surface protection layer provided on the surface side of the pattern layer In a decorative metal plate comprising: The surface protection layer, A resin material containing at least one of a polyester resin and an acrylic resin, A first matting additive having an average particle size of 1 μm or more and 5 μm or less, And a second matting additive having an average particle size of more than 5 μm and 10 μm or less, It has a thickness of 6 μm or more and 12 μm or less A decorative metal plate characterized by this.

2. The surface protection layer contains, with respect to 100 parts by mass of the resin material, The first matting additive in an amount of 0.5 parts by mass or more and 5 parts by mass or less, The second matting additive in an amount of 10 parts by mass or more and 20 parts by mass or less The decorative metal plate according to claim 1, characterized by this.

3. The first matting additive is at least one of silica and acrylic resin beads, The second matting additive is acrylic resin beads The decorative metal plate according to claim 2, characterized by this.

4. A back coating layer is provided on the back side of the base material The decorative metal plate according to claim 1, characterized by this.

5. A chemical conversion coating layer is provided on the front and back surfaces of the base material The decorative metal plate according to claim 1, characterized by this.

6. The base material has a metal coating formed on the front and back surfaces of a steel sheet. The decorative metal sheet according to claim 1, characterized in that.

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