JP7377419B2 - printed decorative metal plate - Google Patents

Description

The present invention relates to a printed decorative metal plate.

Conventionally, on one surface of a metal plate, a primer layer, a base coat layer, a pattern layer, a matte printing layer that forms unevenness on the pattern layer, and a clear coat layer that fills the unevenness of the matte printing layer are provided. A printed decorative metal plate has been proposed in which , are laminated in this order (for example, see Patent Document 1). In the printed decorative metal plate described in Patent Document 1, the matting agent contained in the matte printing layer gives a tactile three-dimensional effect and a visual three-dimensional effect.
However, in the printed decorative metal plate described in Patent Document 1, there is a problem that the matting agent is buried in the clear coat layer, resulting in a decrease in tactile three-dimensional effect and visual three-dimensional effect, resulting in a decrease in design.

Japanese Patent Application Publication No. 2017-164942

The present invention was made in view of the above-mentioned problems, and an object thereof is to provide a printed decorative metal plate that has a tactile three-dimensional effect and a visual three-dimensional effect, and is excellent in design. do.

In order to solve the above problems, one aspect of the present invention provides (a) matte printing that forms a primer layer, a base coat layer, a pattern layer, and unevenness on the pattern layer on one surface of a metal plate. and a clear coat layer that covers the uneven surface of the matte print layer are laminated in this order, wherein (b) the matte print layer has a thickness of 100% of the thickness of the clear coat layer. The object of the present invention is to provide a printed decorative metal plate containing a matting agent having a larger average particle size of less than 200%.

According to the present invention, since the matting agent protrudes from the surface of the clear coat layer, the protruding matting material can provide a tactile three-dimensional effect and a visual three-dimensional effect. Therefore, it is possible to provide a decorative sheet that has a tactile three-dimensional effect and a visual three-dimensional effect and is excellent in design.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating a printed decorative metal plate according to an embodiment of the present invention.

Hereinafter, a printed decorative metal plate and a method for manufacturing the same according to an embodiment of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments, and modifications such as changes in design can be made based on the knowledge of those skilled in the art, and forms with such modifications can also be applied to the present invention. included in the range. Further, each drawing is appropriately exaggerated to facilitate understanding.

(composition)
As shown in FIG. 1, a printed decorative metal plate 10 according to an embodiment of the present invention includes a metal plate 1, a primer layer 2, a base coat layer 3, a pattern layer 4, a matte printing layer 5, and a clear coat layer. 6 and a back coat layer 7. Then, on one side 1a of the metal plate 1, a primer layer 2, a base coat layer 3, a pattern layer 4, a matte printing layer 5 forming unevenness on the pattern layer 4, and unevenness of the matte printing layer 5 are disposed. and a clear coat layer 6 that fills the area are laminated in this order. Furthermore, a back coat layer 7 is laminated on the other surface 1b of the metal plate 1.

(metal plate)
The metal plate 1 is a base plate of the printed decorative metal plate 10. As a material for the metal plate 1, for example, a hot-dip galvanized steel plate or an aluminum plate can be used. A hot-dip galvanized steel sheet is a steel sheet whose surface is coated with zinc (metallic coating) to improve adhesion to paint and corrosion resistance. Further, a chemical conversion coating 8 may be provided on the surface layer of the galvanized steel sheet in order to improve resistance to white rust. As the chemical conversion film 8, for example, a chromate film or a chromate-free film can be adopted. In particular, from the standpoint of environmental impact, a chromate-free film is most desirable. The chromate-free film 7 can be formed by chromate-free treatment (non-chromate treatment). The treatment liquid used for chromate-free treatment includes, for example, a treatment liquid that does not contain hexavalent chromium, a treatment liquid that contains Zr or Ti or salts of both, or a treatment liquid that contains a silane coupling agent. Can be adopted. By chromate-free treatment using such a treatment liquid, a chromate-free film containing Ti, Zr, P, Ce, Si, Al, Li, etc. as main components and containing no chromium is formed on the zinc plating layer. can. That is, the chromate-free coating includes, for example, Ti, Zr, P, Ce, Si, Al or Li or any combination thereof. The type of metal plate 1 is not particularly limited, and may be, for example, a single metal plate or a metal plate constituting the outermost layer of a composite steel plate.

(Primer layer)
The primer layer 2 is a layer for improving the adhesion and corrosion resistance between the base coat layer 3 and the metal plate 1. As the material for the primer layer 2, for example, a known resin paint for primers can be used. As the resin paint, for example, a curable paint containing polyester resin, urethane resin, epoxy resin, melamine resin, alkyd resin, phenol resin, acrylic resin, etc. can be employed. Furthermore, an anti-rust pigment may be added to the primer layer 2 for the purpose of improving corrosion resistance. The thickness of the primer layer 2 is, for example, 1 μm or more and 10 μm or less.

(base coat layer)
The base coat layer 3 is a layer for imparting the base color of the pattern layer 4 to the printed decorative metal plate 10. As the material for the base coat layer 3, for example, a resin paint containing a known binder resin for base coats can be used. As the binder resin, for example, thermosetting resins such as polyester resins, urethane resins, epoxy resins, melamine resins, alkyd resins, phenol resins, and acrylic resins can be employed. Additionally, a base color pigment is added to the resin coating. The thickness of the base coat layer 3 is, for example, 10 μm or more and 30 μm or less.

(Picture layer)
The pattern layer 4 is a layer for giving the printed decorative metal plate 10 a design based on a pattern. The pattern layer 4 is formed using a printing ink or paint, etc., in which a coloring agent such as a dye or a pigment is dissolved or dispersed in a suitable diluting solvent together with a suitable binder resin. The printing ink or paint is applied by various printing methods such as gravure printing, offset printing, or inkjet printing, and various coating methods such as gravure coating or roll coating. Further, as the binder resin, for example, a known binder resin can be employed. For example, thermosetting resins such as polyester resins, urethane resins, epoxy resins, melamine resins, alkyd resins, phenolic resins, and acrylic resins, such as those used in the primer layer 2 described above, can be used. Further, as the pigment, for example, a known pigment can be used. For example, titanium oxide, zinc white, carbon black, iron/composite oxide, iron oxide, organic pigment, metallic pigment, pearl pigment, etc. can be used. Among these, iron/complex oxides are used as thermal barrier pigments.

In addition, the patterns are not particularly limited, but include, for example, wood grain patterns, stone grain patterns, cloth grain patterns, abstract patterns, geometric patterns, letters, symbols, solid colors, or a combination of two or more of these. It can be used. The thickness of the pattern layer 4 is, for example, 0.1 μm or more and 0.2 μm or less. Note that when inkjet printing is used, the thickness of the pattern layer 4 becomes thicker than this range.

(matte printing layer)
The matte printing layer 5 is a layer for giving a visual three-dimensional effect and a tactile three-dimensional effect. For example, it is partially formed on the pattern layer 4 to cover a part of the pattern layer 4 (for example, when the pattern of the pattern layer 4 is a wood grain pattern, the portion facing the conduit pattern of the wood grain pattern). The matte printing layer 5 is formed using a printing ink or the like in which a matting agent is dissolved or dispersed in a suitable diluting solvent together with a suitable binder resin. The printing ink or the like is applied by various printing methods using a printing plate, such as a gravure printing method or an offset printing method. Further, as the binder resin, for example, thermosetting resins such as polyester resins, urethane resins, epoxy resins, melamine resins, alkyd resins, phenol resins, acrylic resins, and ultraviolet curable resins can be used. Further, the thermosetting resin may be a two-component curing resin.

Further, as the matting agent, for example, inorganic fine particles such as silica, calcium carbonate, synthetic mica, titanium oxide glass particles, etc., organic fine particles such as polyethylene fine particles, acrylic fine particles, urethane fine particles, urea resin, nylon resin, balloon, etc. can be used. can. The average particle diameter of the matting agent is preferably 100% or more and 200% or less of the thickness of the clear coat layer 6 in order to give a visual three-dimensional effect and a tactile three-dimensional effect. That is, since the thickness of the clear coat layer 6 is required to be about 10 μm from the viewpoint of physical properties, assuming that the thickness is 10 μm, the particle size of the matting agent is preferably 10 μm or more and less than 20 μm. If it is less than 100%, the matting agent will be buried in the clear coat layer 6, resulting in a weak matte feel and feel to the touch, making it difficult to perceive a three-dimensional effect visually or three-dimensionally by touch. On the other hand, if it is greater than 200%, the matting agent will fall off from the printed decorative metal plate 10.

The average particle size of the matting agent can be controlled within a desired range by, for example, pulverizing a mass of the matting agent into particles and then sieving the resulting particles. Here, the average particle size is the average particle size observed under a microscope. The average particle size determined by microscopic observation can be obtained, for example, by performing microscopic observation, measuring the particle size of 100 arbitrary particles using image processing software, and averaging the numbers. Note that the particle size refers to the average value of the major axis diameter and minor axis diameter of the particles of the matting agent.
In addition, when the matte printing layer 5 contains a plurality of matting agents, the average particle diameter of the matting agent with the largest content among the plurality of matting agents is 100% of the thickness of the clear coat layer 6. 200% or less. As a result, it is possible to more reliably feel the matte feel and the tactile feel, and it is possible to more reliably feel the three-dimensional effect by sight and the three-dimensional effect by touch.

Further, the amount of the matting agent added is preferably 5 parts by mass or more and 20 parts by mass or less with respect to 100 parts by mass of the binder resin. Further, the pattern of the matte printing layer 5 is not particularly limited, but examples thereof include a conduit pattern, an uneven pattern on the surface of a stone plate (cleavage surface of granite, etc.), a cloth texture pattern, a satin pattern, a grain pattern, a hairline pattern, etc. can be used. When forming a conduit pattern, it is preferable to arrange it in synchronization with the pattern of the pattern layer 4. Synchronization is a state in which the pattern and the conduit pattern overlap by 50% or more when viewed from the front side. The printing plate used to print the matte printing layer 5 is a printing plate manufactured by a laser-porschel plate. Here, the matte printing layer 5 may become whitish due to the addition of a matting agent such as silica. For this reason, it is preferable to mix black ink, coloring pigments such as iron/composite oxide, iron oxide, carbon black, etc. with the ink resin. Adding ink gives it a dark brownish color, making it possible to express more realistic wood grain.

(Clear coat layer)
The clear coat layer 6 is a transparent layer for imparting weather resistance, bending workability, scratch resistance, and cleanability to the printed decorative metal plate 10. As the main component of the clear coat layer 6, for example, a curable resin can be used. That is, it is preferable that the resin component is substantially composed of a curable resin. Substantial means, for example, 80 parts by mass or more when the entire resin is 100 parts by mass. As the curable resin, for example, an ionizing radiation curable resin or a thermosetting resin can be used. Furthermore, the clear coat layer 6 may contain, for example, a fluororesin. Furthermore, weatherproofing agents, plasticizers, stabilizers, fillers, dispersants, dyes, pigments, solvents, etc. may be added to the clear coat layer 6 as necessary. However, the content ratio of the curable resin is preferably 60 parts by mass or more based on the entire resin. The thickness of the clear coat layer 6 is preferably 10 μm or more and 15 μm or less.

Furthermore, the clear coat layer 6 contains aggregate to improve scratch resistance. As the aggregate, for example, transparent aggregates such as feldspar, silica sand, anhydrite, glass beads, and synthetic resin beads can be used. The average particle size of the aggregate shall be equal to or less than the average particle size of the matting agent. If the particle size is larger than the average particle size of the matting agent, the unevenness caused by the aggregate will affect the matte feel and texture, reducing the design. In addition, when the matte printing layer 5 contains a plurality of matting agents, the average particle size of the aggregate is equal to or less than the average particle diameter of the matting agent with the largest content among the plurality of matting agents. .

(Backside coating layer)
The back coat layer 7 is a layer for coating the other surface 1b of the metal plate 1, that is, the back surface of the printed decorative metal plate 10. The back coat layer 7 is formed by applying a paint containing polyester resin or epoxy resin as a main component to the metal plate 1, and then heating and baking the applied paint.

As explained above, the printed decorative metal plate 10 according to the embodiment of the present invention has a primer layer 2, a base coat layer 3, a pattern layer 4, and a pattern layer 4 on one surface 1a of the metal plate 1. A matte printing layer 5 provided thereon to form unevenness and a clear coat layer 6 filling the unevenness of the matte printing layer 5 were laminated in this order. The matte printing layer 5 contains a matting agent having an average particle diameter of 100% or more and 200% or less of the thickness of the clear coat layer 6. Therefore, it is possible to prevent the matting agent from being buried in the clear coat layer 6, and it is possible to provide a printed decorative metal plate 10 that has a tactile three-dimensional effect and a visual three-dimensional effect, and is excellent in design.

In addition, the printed decorative metal plate 10 according to the embodiment of the present invention can reduce manufacturing costs since the process from chemical conversion treatment of the metal plate 1 to application of the curable resin for the clear coat layer 6 can be performed in one step.
In addition, in the printed decorative metal plate 10 according to the embodiment of the present invention, when the matte printing layer 5 includes a plurality of matting agents, the average of the matting agents with the largest content among the plurality of matting agents The particle size was set to be 100% or more and 200% or less of the thickness of the clear coat layer 6. Therefore, it is possible to more reliably feel the three-dimensional effect through visual perception and the three-dimensional effect through tactile sensation.
Moreover, in the printed decorative metal plate 10 according to the embodiment of the present invention, the clear coat layer 6 has an average particle size smaller than or equal to the average particle diameter of the matting agent having the largest content among the plurality of matting agents of the matte printing layer 5. It was made to contain aggregates having a diameter. Therefore, it is possible to suppress the unevenness caused by the aggregate from affecting the matte feel and the feel to the touch, and it is possible to suppress the deterioration of the design quality.

Furthermore, in the printed decorative metal plate 10 according to the embodiment of the present invention, since the metal plate 1 is a hot-dip galvanized steel plate having a chromate-free coating, the environmental load during manufacturing can be reduced.
Further, in the method for manufacturing the printed decorative metal plate 10 according to the embodiment of the present invention, the matte printing layer 5 of the printed decorative metal plate 10 is formed by a printing method using a printing plate manufactured by laser pochel plate making. I made it. Here, a printing plate manufactured by laser Porshell plate making has a larger cell volume than, for example, a printing plate manufactured by Helio plate making. Therefore, by using a printing plate manufactured by laser pochel plate making, it is possible to enlarge the halftone dots of the ink constituting the matte printing layer 5, and more reliably achieve a three-dimensional effect visually and three-dimensionally by touch. It can make you feel.

Examples and comparative examples of the printed decorative metal plate 10 according to the embodiment of the present invention will be described below.
(Examples 1 to 10, Comparative Examples 1 to 4)
As shown in Tables 1 and 2, the details of the matting agent added to the matte printing layer 5 and the plate specifications of the matte printing layer 5 were set, and the printed decorative metals of Examples 1 to 10 and Comparative Examples 1 to 4 were prepared. A plate 10 was produced. At that time, the metal plate 1 used was a steel plate having a thickness of 0.4 mm in accordance with JIS G 3302, coated with hot-dip galvanizing, and further provided with a chromate-free coating as the chemical conversion coating 8.

(Performance evaluation)
Subsequently, the following performance evaluations were performed on the printed decorative metal plates 10 of Examples 1 to 10 and Comparative Examples 1 to 4.
(Gloss matte effect evaluation)
In the gloss matte effect evaluation, the printed decorative metal plate 10 was looked at and the visual three-dimensional effect was evaluated. The evaluation criteria is "○" if you can clearly feel the three-dimensional effect visually, "△" if you can slightly feel the three-dimensional effect visually, and "×" if you cannot feel the three-dimensional effect visually. ”.
(Touch evaluation)
In the tactile evaluation, the printed decorative metal plate 10 was touched with fingers to evaluate the three-dimensional effect based on the tactile sensation. The evaluation criteria is "○" if you can clearly feel the three-dimensional effect due to touch, "△" if you can slightly feel the three-dimensional effect due to touch, and "×" if you cannot feel the three-dimensional effect due to touch. ”.

(Evaluation results)
As shown in Tables 1 and 2, the printed decorative metal plates 10 of Examples 1 to 8 were evaluated as "○" in the gloss matte effect evaluation and the touch feeling evaluation. Moreover, the printed decorative metal plates 10 of Examples 9 and 10 were evaluated as "○" or "△" in the gloss matte effect evaluation and the touch feeling evaluation. Here, in the printed decorative metal plates 10 of Examples 1 to 4, the matte printing layer 5 was provided using a printing plate (plate depth 60 μm) manufactured by laser Porshell plate making, and in the case of Examples 9 and 10, In the printed decorative metal plate 10, a matte printing layer 5 is provided using a printing plate (plate depth 100 μm) manufactured by Helio plate making. That is, in Examples 1 to 4, 9, and 10, a printing plate made by laser Porshell plate making with a plate depth of 60 μm and a printing plate made by Helio plate making with a plate depth of 100 μm were tested. ) Examples 9 and 10 using a printing plate with a shallow plate depth had a worse gloss matte effect evaluation and feel evaluation than Examples 1 to 4 using a printing plate made by laser pochel plate making (plate depth 60 μm). became. This means that when the matte printing layer 5 is formed using a printing plate manufactured by Helio plate making, the cell volume is smaller than when the matte printing layer 5 is formed using a printing plate manufactured by Laser Porshell plate making. This is thought to be due to the smaller size.

On the other hand, in the printed decorative metal plates 10 of Comparative Examples 1 and 2, the matting agent with the largest content among the plurality of matting agents in the matte printing layer 5 was buried in the clear coat layer 6, resulting in a poor matte feel and texture. became weaker, the gloss matte effect evaluation was "△", and the texture evaluation was "x". In addition, in the printed decorative metal plates 10 of Comparative Examples 3 and 4, the average particle diameter of the aggregate of the clear coat layer 6 is the average particle size of the matting agent with the largest content among the plurality of matting agents of the matte printing layer 5. Since the grain size (20 μm) is larger than the particle size (15 μm), the unevenness caused by the aggregate affects the matte feeling and texture, resulting in a gloss matte effect rating of “×” or “△” and a texture rating of “×”. .
Therefore, it was confirmed that the printed decorative metal plates 10 of Examples 1 to 10 were superior to the printed decorative metal plates 10 of Comparative Examples 1 to 4 in terms of gloss matte effect evaluation and texture evaluation.

DESCRIPTION OF SYMBOLS 1... Metal plate, 1a... One side of the metal plate, 1b... The other side of the metal plate, 2... Primer layer, 3... Base coat layer, 4... Pattern layer, 5... Matte printing layer, 6... Clear coat layer, 7... Back coat layer, 8... Chemical conversion film, 10... Printed decorative metal plate

Claims (4)

On one side of the metal plate, a primer layer, a base coat layer, a pattern layer, a matte printing layer forming unevenness on the pattern layer, and a clear coat layer covering the uneven surface of the matte printing layer. and are laminated in this order to form a printed decorative metal plate,
The clear coat layer contains aggregate,
The matte printing layer includes a matting agent having an average particle size of more than 100% and less than 200% of the thickness of the clear coat layer,
A printed decorative metal plate characterized in that the average particle size of the matting agent is larger than the average particle size of the aggregate . When the matte printing layer contains a plurality of matting agents, the average particle diameter of the matting agent with the largest content among the plurality of matting agents is 100% or more of the thickness of the clear coat layer. The printed decorative metal plate according to claim 1, wherein the printed decorative metal plate is 200% or less. The printed decorative metal according to claim 2, wherein the clear coat layer includes aggregate having an average particle diameter equal to or less than the average particle diameter of the matting agent having the largest content among the plurality of matting agents. Board. 4. The printed decorative metal sheet according to claim 1, wherein the metal sheet is a hot-dip galvanized steel sheet having a chromate-free coating.

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