JP4840163B2 - Painting method - Google Patents

Description

  The present invention relates to a coating method for forming a raised coating layer partially raised on a substrate.

  Conventionally, a coating method for forming a partially raised coating layer on a substrate is known from Patent Document 1 and the like.

  In the conventional example shown in the above-mentioned Patent Document 1, when forming a raised coating layer on a substrate, the raised printing in which ionizing radiation curable resin is used as a binder and particles such as alumina particles are mixed by gravure printing. A raised coating layer is formed using the composition for an application, and then the raised coating layer is formed by irradiating an electron beam with an electron beam irradiation apparatus.

  In addition, it has been conventionally known that particles such as alumina particles are mixed in the composition for raising printing as described above, but the composition for raising printing mixed with the particles as described above is applied. When the swelled paint layer is formed, most of the particles are dispersed inside the swelled paint layer, and the particles present on the surface of the swelled paint layer are not a small part of the total amount of mixed particles.

  Here, when considering the mixing of functional particles such as odor generating particles that generate odors, photocatalyst particles, antibacterial particles having antibacterial activity, etc., in conventional coating methods, There is a problem that only a small part of the swell is located on the surface of the raised coating layer, and the odor generation function, photocatalytic function, antibacterial function and the like cannot be sufficiently exhibited.

  Moreover, in the said prior art example, an electron beam irradiation apparatus other than a coating device is required. In addition, since gravure printing requires an original plate, many different types of original plates are required to make the pattern of the raised coating layer different.

  Moreover, although this patent document 1 has a statement that the pattern layer may be formed by ink jet, there is no description of how the pattern layer is specifically formed by ink jet.

In addition, the ink-jet coating method does not require an original plate as in gravure printing, and of course, even when it is desired to change the pattern, it does not require many types of original plates corresponding to the pattern change as in gravure printing. Have. However, in the ink-jet coating method, a type of paint that is cured by removing a solvent is generally used, and there are the following problems in using a reaction-curing type paint in the ink-jet coating method. In other words, when a reaction-curing type paint is used as a paint for forming a raised coating layer on the base material, the inkjet nozzle is likely to be clogged by the hardening of the paint, and in particular, a paint with a fast curing reaction cannot be used. . For this reason, it is not realistic to form a raised paint layer by inkjet using a reaction-curable paint.
Japanese Patent Laid-Open No. 10-119228

  The present invention has been invented in view of the above-mentioned conventional problems, and it is possible to form a swelled coating layer by a simple method and to provide a coating that allows particles to be concentrated on the surface of the swelled coating layer. The main problem is to provide a coating method that can be applied.

  Another problem is that a coating that can form a raised coating layer using a reaction-curable coating by an inkjet coating method and that allows particles to be concentrated and exist only on the surface of the raised coating layer. It is an object to provide a method.

  In order to solve the above-mentioned problems, the coating method according to the present invention is to apply the coating agent 1 on the substrate 2 by ejecting the coating agent 1 by inkjet, and then apply the coating agent 1 on the coating agent 1 applied to the substrate 2. The mixture of 1 curing agent 3 and particles 5 is applied by flying by ink jet, so that the coating main agent 1 and the curing agent 3 are reactively cured on the substrate 2 and the particles 5 are present on the surface. The layer 4 is formed.

  By adopting such a method, it is possible to easily and accurately form the swelled coating layer 4 in which the coating agent 1 and the curing agent 3 are reaction-cured by the inkjet coating method, and most of the particles 5 are formed. It can be concentrated on the surface of the raised coating layer 4. Thereby, for example, by using functional particles such as odor generating particles that generate odors, or photocatalyst particles, and antibacterial particles having antibacterial activity, most of the used particles are raised and concentrated on the surface of the coating layer 4. By being present, almost all the functions of the particles 5 used (for example, odor generation, photocatalytic function, antibacterial function, etc.) can be effectively exhibited. In addition, despite the use of inkjet, there is no risk that the reaction-curable coating will cure and the inkjet nozzle will become clogged. Therefore, there is no problem even if reaction curing type paint is used for the ink jet coating method, especially for paints with extremely fast reaction, and when paint with fast reaction is used, the coating time can be greatly shortened. . Moreover, the usage-amount of a coating material can also be reduced by using an inkjet.

Also, the paint 6 is blown off by ink jet and applied onto the base material 2, and then the particles 5 are mixed in the solvent 7 having a property of dissolving the paint 6 on the paint 6 applied onto the base material 2. May be formed by forming a raised coating layer 4 in which the coating is cured on the substrate 2 and the particles 5 are present on the surface.

  By adopting such a method, the raised coating layer 4 can be formed easily and accurately by the inkjet coating method, and most of the particles 5 can be concentrated on the surface of the raised coating layer 4. is there. Thereby, for example, by using functional particles such as odor generating particles that generate odors, or photocatalyst particles, and antibacterial particles having antibacterial activity, most of the used particles are raised and concentrated on the surface of the coating layer 4. By being present, almost all the functions of the particles 5 used (for example, odor generation, photocatalytic function, antibacterial function, etc.) can be effectively exhibited.

  Moreover, the coating agent 1 is applied onto the substrate 2, and then the curing agent 3 of the coating agent 1 is applied to the coating agent 1 applied onto the substrate 2 by ink jetting to form an arbitrary pattern. Then, only the arbitrary pattern portion where the curing agent 3 is applied is cured on the base material 2 applied to the base material 2 and the particles 5 are adhered to the surface of the portion cured with the curing agent 3. 2 may be characterized by removing the unreacted portion that has not been reacted and cured with the curing agent 3 of the coating material main agent 1 applied onto the substrate 2.

  By adopting such a method, it is possible to easily and accurately form the raised coating layer 4 in the same shape as the pattern of the curing agent 3 applied by inkjet, and to apply a three-dimensional pattern with high accuracy using a reactive curable paint. And most of the particles 5 are raised and can be concentrated on the surface of the coating layer 4. Thereby, for example, by using functional particles such as odor generating particles that generate odors, or photocatalyst particles, and antibacterial particles having antibacterial activity, most of the used particles are raised and concentrated on the surface of the coating layer 4. By being present, almost all the functions of the particles 5 used (for example, odor generation, photocatalytic function, antibacterial function, etc.) can be effectively exhibited. In addition, there is no risk that the ink-jet nozzles may become clogged due to the curing of the reaction-curable coating material despite the use of ink-jet for part of the painting process. Therefore, in the coating method using reaction-curable paint, there is no problem even if the inkjet coating method is used as part of the painting process. When used, the painting time can be greatly reduced.

  Since the present invention forms a swelled coating layer using the inkjet coating method as a whole of the coating process or a part of the coating process as described above, the swelled coating layer can be easily and accurately formed by the inkjet coating method, The particles can be concentrated and exist only on the surface of the raised coating layer.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  FIG. 1 shows an embodiment of the present invention. As the coating material used in the embodiment of the present invention, a reactive curable coating material is used which forms a coating layer by reaction-curing a coating material main component and a curing agent. Here, the reactive curable paint used is that the paint main agent 1 does not cure by itself, and the curing agent 3 does not react and cure by itself, and the paint main agent 1 and the curing agent 3 react. The one that hardens for the first time.

  In the present embodiment, first, as shown in FIG. 1 (a), the paint main agent 1 is discharged and ejected from a nozzle (not shown) of an ink jet device onto a base material 2 made of wood, resin, metal or the like. It is applied to a target position on the base material 2 so as to be a target pattern, and a pattern of the target pattern is partially drawn on the base material 2 with the coating material 1.

  Next, the curing agent 3 of the coating agent 1 in which particles are mixed is discharged from a nozzle (not shown) of another ink jet apparatus onto the coating agent 1 applied to the substrate 2, and the coating agent 1 As shown in FIG. 1 (b), the curing agent 3 containing particles 5 is applied onto the base material 1 of the target pattern applied on the base material 2 as shown in FIG. To do.

  When the curing agent 3 containing the particles 5 is applied on the coating material 1 as described above, the coating material 1 and the curing agent 3 are reacted and cured, and the object on the substrate 2 as shown in FIG. The swell coating layer 4 is formed at the position where the particles 5 are formed, and the particles 5 are integrally attached to the surface of the swell coating layer 4 to be formed. That is, the raised coating layer 4 in which the particles 5 are integrally attached to the surface is formed.

  As the coating material main agent 1 used in the present invention, for example, a polyol-based resin such as a urethane resin is used, and as the curing agent 3, an isocyanate is used. As another example, an epoxy resin is used as the paint main agent 1, and an amine or acid anhydride curing agent is used as the curing agent 3.

  The particles 5 used in the present invention include functional particles such as odor particles that generate odors, photocatalyst particles having a photocatalytic function such as titanium oxide, or antibacterial particles having an antibacterial action such as silver. Is used. And since almost all of the particles 5 mixed with the curing agent 3 and ejected by ink jet are concentrated on the surface of the raised coating layer 4, almost all of the skipped particles 5 have a function of the particles 5 ( Odor generation, photocatalytic function, antibacterial function, etc.) are effectively exerted, and useless particles 5 that are mixed in the raised coating layer 4 and are not exposed to the surface are eliminated.

  In the present embodiment, the coating agent 1 is ejected by ink jet and applied onto the substrate 2, and then the curing agent 3 and particles of the coating agent 1 are applied onto the coating agent 1 applied to the substrate 2. Since the mixture of 5 and 5 is applied by ink jetting, the pattern of the raised coating layer 4 with the particles 5 integrally attached to the surface can be easily changed.

  Next, another embodiment of the present invention will be described with reference to FIG. In the present embodiment, first, as shown in FIG. 2A, the paint 6 is discharged and ejected from a nozzle (not shown) of an ink jet device onto a base material 2 made of wood, resin, metal, or the like. The paint 6 is applied to a target position on the base material 2 so as to form a target pattern, thereby forming a raised coating layer 4.

  Next, as shown in FIG. 2B, a mixture of particles 5 in a solvent 7 for the paint 6 is blown off by ink jetting on the swelled paint layer 4 obtained by curing the paint 6 applied to the substrate 2. As a result, the particles 5 are integrally attached to the raised coating layer 4 on the substrate 2 by the action of the solvent 7 to form the raised coating layer 4 having the particles 5 on the surface as shown in FIG.

  As the coating material 6 used in the present embodiment, various types of coating materials such as a coating material that is cured by removing a solvent, a reactive curable coating material, and a UV coating material can be used.

  Also in the present embodiment, as the particles 5, for example, functional particles such as odor particles that generate odors, photocatalyst particles having a photocatalytic function, or antibacterial particles having an antibacterial action are used. . And since most of the particles 5 that have been ejected by inkjet together with the solvent 7 are concentrated on the surface of the swelled coating layer 4 to be formed, almost all of the skipped particles 5 have the function (smell generation and The photocatalytic function, the antibacterial function, etc.) are effectively exhibited, and useless particles 5 that are mixed in the raised coating layer 4 and are not exposed to the surface are eliminated.

  In addition, since the paint 6 is applied to the target position on the base material 2 by the ink jet coating method so that the target pattern is obtained, and the particles 5 are lifted up together with the solvent 7 by the ink jet to be attached on the coating layer 4. The raised coating layer 4 in which the particles 5 are present on the surface can be easily and accurately formed.

  Further, in the present embodiment, the coating material 6 is blown off by ink jet and applied onto the base material 2, and then the mixture of particles 5 in the solvent is jetted onto the coating material applied onto the base material 2 by ink jetting. Therefore, when the pattern pattern of the raised coating layer 4 in which the particles 5 are integrally attached to the surface is changed, it can be easily handled.

  Next, still another embodiment of the present invention will be described with reference to FIG.

  As the coating material used in the present embodiment, a reactive curable coating material is used which forms a coating layer by reacting and curing a coating material and a curing agent. Here, the reactive curable paint used is that the paint main agent 1 does not cure by itself, and the curing agent 3 does not react and cure by itself, and the paint main agent 1 and the curing agent 3 react. The one that hardens for the first time.

  In this embodiment, first, as shown in FIG. 3 (a), a paint base agent is applied to the whole or part of the upper surface of the base material 2 such as a wood material, a resin, or a metal by a roll coater, a flow coater, spray coating, or other application methods. Apply a solid 1

  Next, a desired pattern is obtained by discharging the curing agent 3 of the coating agent 1 in which particles 5 are mixed from a nozzle (not shown) of an ink jet apparatus onto the coating agent 1 solidly applied to the substrate 2. As shown in FIG. 3B, the curing agent 3 containing the particles 5 is applied to the target pattern on the base material 1 that has been solidly applied on the substrate 2 as shown in FIG.

  Also in the present embodiment, as the particles 5, for example, functional particles such as odor particles that generate odors, photocatalyst particles having a photocatalytic function, or antibacterial particles having an antibacterial action are used. .

  When the curing agent 3 containing the particles 5 is applied in a desired pattern onto the paint main agent 1 that has been solid-coated on the substrate 2 as described above, the curing agent of the solid paint main agent 1 is applied. Only the portion corresponding to the pattern to which 3 is applied is reactively cured with the curing agent 3, and the particles 5 are integrally attached to the surface of the reaction-cured portion (the portion indicated by 4 'in FIG. 3C). .

  Next, the portion where the paint main agent 1 is left uncured is removed by the solvent of the paint main agent 1 so that only the portion where the paint main agent 1 and the hardener 3 are reaction-cured and the particles 5 are integrally attached to the surface. As shown in FIG. 3D, a raised coating layer 4 is formed on the substrate 2 in a desired pattern and with the particles 5 integrally attached to the surface.

  For example, a polyol-based resin such as a urethane resin is used as the paint main agent 1 used in the present embodiment, and an isocyanate is used as the curing agent 3. As another example, an epoxy resin is used as the paint main agent 1, and an amine or acid anhydride curing agent is used as the curing agent 3.

  In the present embodiment, in applying the reaction curable coating material, the coating agent 1 is applied by solid coating by a roll coater, flow coater, spray coating or the like, and then only the curing agent 3 is applied by an ink jet coating method. By coating, the curing agent 3 can be accurately applied to the target pattern by the ink jet method, and in this case, only the curing agent 3 mixed with the particles 5 is applied by the ink jet method, so that it reacts at the nozzle portion of the ink jet device. The curable paint does not harden and become clogged, and even a reactive curable paint can be applied with high accuracy by the ink jet coating method, and the pattern of the raised coating layer 4 to be formed Since it is only necessary to change the coating pattern with the curing agent 3 mixed with the particles 5 in the change, It can change the pattern of the raised coating layer 4 having a particle 5 on the surface.

  Also in the present embodiment, almost all of the particles 5 mixed with the curing agent 3 and ejected by ink jet are concentrated on the surface of the swelled coating layer 4 to be formed. The functions (e.g., odor generation, photocatalytic function, antibacterial function, etc.) possessed by 5 are effectively exerted, and useless particles 5 that are mixed in the raised coating layer 4 and are not exposed to the surface are eliminated.

  In any of the above-described embodiments, an undercoat coating layer may be formed on the upper surface of the base material 2 before the coating agent 1 is applied onto the base material 2 such as a wood material, a resin, or a metal. .

  In any of the embodiments, since the raised coating layer 4 having the particles 5 on the surface of only a specific portion of the base material 2 can be formed, coating with extremely high commercial value is possible.

  Further, examples of the pattern of the raised coating layer 4 of the present invention include, for example, a conduit pattern of wood, an anti-slip ridge provided on the upper surface of a step board of a staircase, or a handrail, but only in these examples. Without being limited, the present invention can be applied to various other products.

1 shows an embodiment of the present invention, (a) is an explanatory diagram in which a base coating material is applied to a substrate by inkjet, (b) is an explanatory diagram in which a curing agent mixed with particles is applied by inkjet, and Next, (c) is an explanatory view in which a coating layer in which particles are present on the surface is formed by reaction hardening of the coating material and the curing agent. FIG. 4 shows another embodiment of the present invention, wherein (a) is an explanatory view showing a state in which a raised coating layer is formed on a base material by inkjet, and (b) is a diagram in which particles are mixed into a solvent by inkjet. It is explanatory drawing which shows the state apply | coated to the rising coating layer, (c) is explanatory drawing which shows the state which made the particle adhere to the surface of the rising coating layer by the effect | action of a solvent. FIG. 6 shows still another embodiment of the present invention, in which (a) is an explanatory view showing a state in which a coating material is applied on a base material, and (b) is an explanation in which a curing agent mixed with particles is then applied by ink jetting. (C) is an explanatory view of a state in which the main component of the paint is reacted and cured only in a portion where the curing agent mixed with particles is applied, and (d) is a diagram showing a state in which an unreacted portion of the main component of the paint is next removed to the surface. It is explanatory drawing which formed the rising coating layer to which the particle | grains adhered.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Paint main ingredient 2 Base material 3 Hardener 4 Swelling coating layer 5 Particles 6 Paint

Claims (3)

  The coating agent is blown off by ink jet and applied onto the substrate, and then the mixture of the curing agent and particles of the coating agent is applied by jetting onto the coating agent applied onto the substrate. A coating method characterized by forming a raised coating layer in which a coating agent and a curing agent are reactively cured on a substrate and particles are present on the surface. The paint is blown off by ink jet and applied onto the substrate, and then the mixture of particles applied in the solvent having the property of dissolving the paint on the paint applied onto the base material is blown off by ink jet onto the base material. A coating method characterized by forming a raised coating layer in which the coating is cured and particles are present on the surface.   Apply the paint base on the base material, and then apply the paint base curing agent on the base material by applying an ink jet to form an arbitrary pattern on the base material. The applied paint base is cured only on the part of the pattern where the curing agent is applied, and particles are adhered to the surface of the part cured with the curing agent, and then reaction-cured with the curing agent of the paint base applied on the substrate. A coating method characterized by removing unreacted parts that have not been removed.

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