JP4455316B2 - Colored composition for airflow movement, colored paint for airflow movement, and method for producing coated article - Google Patents

Description

The present invention relates to a colored composition for airflow movement, a colored paint for airflow movement, and a method for producing a coated product , and in particular, a colored paint for airflow movement for coloring a surface to be coated having irregularities, and an airflow as a raw material thereof The present invention relates to a moving coloring composition, and a method for producing a coated product in which a base material including a surface to be coated having irregularities is coated using the above-mentioned colored coating material for airflow movement.

Conventionally, many proposals have been made on a coated material that has been coated on a substrate including a surface to be coated having irregularities, and a manufacturing method thereof. Have been proposed (see, for example, Patent Documents 1 and 2).
Japanese Patent Laid-Open No. 10-317631 JP 2003-251267 A

  In Patent Document 1, a first paint is applied to a surface to be coated having irregularities, and dried to form an inner paint layer. Further, after applying a second paint to the surface of the inner paint layer, A method has been proposed in which the second coating material applied to the convex portion is scraped off using a roll coater before curing, and the inner coating layer is exposed at the convex portion. Accordingly, it is described that a natural wood grain pattern can be three-dimensionally expressed by the color of the inner paint layer located in the concave portion and the color of the outer paint layer located in the convex portion.

  Patent Document 2 proposes a method of making the color of the concave portion darker than the convex portion by spraying low-viscosity paint on the surface of the building material having irregularities and allowing the paint to flow down into the concave portion before the paint dries. Has been. Thus, it is described that a gradation that matches the uneven pattern on the surface of the building material is obtained, and the appearance of the unevenness change can be emphasized.

  However, in the method of Patent Document 1, the second coating material applied to the convex portion cannot be properly scraped off using a roll coater. In particular, when the surface to be coated is in a form in which convex portions having different protruding heights are irregularly distributed, the scraping roll is brought into contact with the second paint of the convex portion having a lower height than the other. In some cases, the second paint could not be scraped off. For this reason, there are cases where a natural wood grain pattern cannot be expressed in three dimensions.

  Moreover, in the method of patent document 2, the coating environment, such as temperature and base material temperature, the property of a coating material, application | coating unevenness, etc. have a big influence on the finish of a coating surface, and make a coating material flow down to a concave part appropriately. There was something I couldn't do. For this reason, the gradation which matched the uneven | corrugated pattern of the building material surface was not obtained, and the external appearance of uneven | corrugated change could not be emphasized.

The present invention has been made in view of such problems, and can produce a painted product that can highlight the unevenness of the surface to be coated (painted surface) and can exhibit a natural texture gradation. method, the air flow moving coloring composition, and aims to provide an air flow moving colored paint.

The solving means is a method for producing a coated article comprising a colored layer forming step of forming a colored layer on an article to be coated including a surface to be coated having irregularities, wherein the colored layer forming step is performed on the surface to be coated. An application process for applying the colored paint, and before the colored paint is cured, air is blown toward the colored paint, and the colored paint is moved within the surface to be coated by an air current, thereby reducing the thickness of the colored paint. A uniform air blowing step, wherein, in a cross section obtained by cutting the object to be coated in a predetermined direction, one of the inclined surfaces forming the irregularities of the surface to be coated of the object to be coated, with the apex of the convex portion as a boundary When the inclined surface facing the first side is the first inclined surface and the inclined surface facing the other side is the second inclined surface, the thickness of the colored paint positioned on the first inclined surface is set on the second inclined surface. a blowing step for thicker than the thickness of the colored coating located, the And, in the blowing step, the gas injection device to inject the gas to form a gas stream, in a direction including a direction component in the same direction in which the object to be coated is relatively moved with respect to the gas injection device, the gas While spraying to form an air flow and applying an air flow to the colored paint applied to the surface to be coated, the object to be coated is moved relative to the gas injection device, An angle θ formed by a relative movement direction in which the portion to which the airflow hits is relatively moved and the gas jetting direction jetted from the gas jetting device moves relative to the gas jetting device is relative to the gas jetting device. , 30 ° <θ ≦ 70 ° .

  In the production method of the present invention, after applying the colored paint on the surface to be coated having irregularities in the application process, before the colored paint is cured in the blowing process, the air is blown toward the applied colored paint, , Move the colored paint within the surface to be coated (rather than removing the colored paint from the surface to be coated), and make the thickness of the colored paint non-uniform (remove excess colored paint to Not uniform).

  In the air blowing process, among the coated surfaces with irregularities, the colored paint is difficult to move on the slope where the colored paint moves up, and the colored paint is easy to move on the down slope. Will join the side. For this reason, the thickness of the colored paint increases on the uphill slope, and the colored paint decreases on the downhill slope. In this manner, the thickness of the colored paint can be varied by making the thickness of the colored paint (and the colored layer obtained by curing it) non-uniform according to the direction of the slope. As a result, the uphill slope becomes darker than the downhill slope, so that the unevenness of the surface to be painted (painted surface) can be emphasized and a gradation of natural texture can be expressed.

  In the air blowing process, the colored paint may be moved over the entire painted surface, or the colored paint may be moved only on a part of the painted surface. In any case, the unevenness of the surface to be coated (painted surface) can be emphasized in the portion where the colored paint is moved, and a natural texture gradation can be expressed.

In addition to the base material, the object to be coated already has a coating film (for example, a base colored layer obtained by applying and curing another colored paint as a base on the surface of the base material). Including things. Accordingly, the surface to be coated includes not only the surface of the substrate but also the surface of the coating film that has already been formed. Moreover, the manufacturing method of the coated material of this invention can be used with respect to the base material of various materials, such as ceramics, a woody material, a metal, glass, resin, paper, and is used suitably especially with respect to ceramics-type building materials. be able to.
In this case, the colored paint refers to a paint in a state of being applied to a substrate. Therefore, when diluting a stock solution (colored composition) produced in advance, the diluted paint is referred to as a colored paint.

Further, in the manufacturing method of the present invention, in the air blowing process, the gas jetting device relatively moves the portion of the surface to be coated with the airflow while applying the airflow to the colored paint applied to the surface to be coated. Thereby, since the airflow can be appropriately applied to the colored paint applied to the surface to be coated, the colored paint can be appropriately moved on the surface to be coated. Therefore, according to the manufacturing method of the present invention, the unevenness of the surface to be coated (painted surface) can be appropriately emphasized, and a natural texture gradation can be expressed.

In addition, as a gas injection apparatus of this invention, the gas injection apparatus which has a slit-shaped gas injection port is mentioned, for example. Among these, when using a gas injection device in which the longitudinal dimension of the gas injection port is larger than the width of the surface to be coated, the air flow can be applied almost uniformly over the entire coated surface to which the colored paint is applied.
In addition, as a method of relatively moving the portion of the surface to be coated that is exposed to the airflow, for example, a gas injection device is fixed at a predetermined position, and gas is injected from the gas injection device to form an airflow. A method of applying an air flow from one end of the surface to be coated to the other end by moving the object to be coated can be mentioned. Or conversely, the object to be coated may be fixed at a predetermined position and the gas injection device may be moved.

  In the air blowing process, when a gas is injected in a direction including a component in the direction opposite to the direction in which the object to be moved moves relative to the gas injection device to form an air flow, a gas is generated at the interface between the surface to be coated and the colored paint. May enter and remove the colored paint from the surface to be coated by blowing it off. If it becomes like this, the thickness of the coating film of a colored paint will become thin and uniform as a whole, and it will become impossible to make an uneven feeling stand out.

  On the other hand, in the manufacturing method of this invention, in a ventilation process, gas is injected in the direction containing the component of the same direction as the direction to which a to-be-coated object moves relatively with respect to a gas injection apparatus, and airflow is formed. Accordingly, the colored paint can be appropriately moved without blowing off the colored paint and removing it from the surface to be coated. For this reason, it is possible to increase the thickness of the colored paint on the ascending slope and thin the colored paint on the descending slope. Therefore, the unevenness of the surface to be coated (painted surface) can be emphasized and a natural texture gradation can be expressed.

In the air blowing process, if the angle θ formed by the gas injection direction and the relative movement direction of the object to be coated is too small (θ = 0 ° when the injection direction and the movement direction are the same), the air current is colored. It flows on the surface of the (liquid film), and the colored paint cannot be moved appropriately. On the other hand, as in the manufacturing method of the present invention, the angle θ formed by the gas injection direction and the relative movement direction of the object to be coated is set to 30 ° <θ ≦ 70 ° , so that the colored paint can be appropriately applied. Can be moved.

  Furthermore, in any one of the above-described methods for producing a coated object, the gas injection device includes a nozzle having a slit-shaped gas injection port, and in the blowing step, the shortest distance between the gas injection port and the object to be coated is provided. The distance is set to 2.0 to 4.0 cm, the internal pressure of the nozzle is set higher by 0.035 to 0.085 MPa than the external air pressure, and a method for manufacturing a coated product in which gas is injected from the gas injection port is preferable. .

  The gas injected from the gas injection device diffuses gradually after being injected. Therefore, if the distance between the gas injection device and the object to be coated is too large, the gas diffuses too much, and the colored paint cannot be moved appropriately by the airflow. In addition, if the distance between the gas injection device and the object to be coated is too short, the colored paint is scattered by the air current and adheres to the gas injection device, or due to vibration or other influences of the manufacturing device (production line), etc. There is also a risk of contact with the object to be coated. On the other hand, in the manufacturing method of the present invention, the shortest distance between the gas injection device and the object to be coated is set to 2.0 to 4.0 cm. Thereby, the colored paint can be appropriately moved on the surface to be coated by the gas air current ejected from the gas ejection device.

  Furthermore, if the momentum (energy) of the gas to be injected is too small, the colored paint cannot be appropriately moved by the airflow. On the other hand, if the momentum (energy) is too large, the colored paint is scraped off on the uneven surface to which the colored paint moves, and the colored paint (and further cured) The thickness of the (colored layer) cannot be changed.

  On the other hand, in the manufacturing method of the present invention, the internal pressure of the nozzle is set higher by 0.035 to 0.085 MPa than the external pressure, and gas is injected from the gas injection port. Thereby, the airflow which has the momentum (energy) which can move a colored coating material appropriately can be formed. Therefore, among the surfaces to be coated, the thickness of the colored paint is increased on the uphill slope and the colored paint is thinned on the downhill slope, and the thickness of the colored paint (and the colored layer obtained by curing this) is changed. be able to. Thereby, while being able to make the unevenness | corrugation feeling of a to-be-coated surface (painted surface) stand out, the gradation of a natural texture can be expressed.

Furthermore, it is a manufacturing method of the coated object in any one of the above, Comprising: In the said ventilation process, the coated object which makes the relative speed with which the said to-be-coated object moves relatively with respect to the said gas injection apparatus shall be 20-45 m / min. It is preferable to use this manufacturing method.
By setting the relative speed of the object to be coated with respect to the gas injection device to 25 m / min or more and less than 45 m / min, the colored paint can be appropriately moved.

  Furthermore, in any one of the above-described methods for producing a coated product, the colored paint has a viscosity of 1.0 to 3.0 P (poise) measured using a B-type rotary viscometer at a rotational speed of 60 rpm. It is good to be the manufacturing method of the coating material which is

  When the viscosity of the colored paint is too low, the fluidity of the colored paint is too high, so that the form may not be maintained even if the colored paint is once moved by an air flow in the blowing process. On the other hand, when the viscosity of the colored paint is too high, there is a possibility that the colored paint cannot be appropriately moved by the air current in the blowing process. Therefore, even if the viscosity of the colored paint is too low or too high, the thickness of the colored paint (colored layer) is changed (increased / decreased) as intended, and the colored paint ( It becomes difficult to make a difference in the thickness of the (colored layer).

  On the other hand, in the production method of the present invention, a colored paint having a viscosity of 1.0 to 3.0 P (poise) measured using a B-type rotary viscometer at a rotation speed of 60 rpm is used. By using a colored paint having such a viscosity, in the blowing process, the colored paint is appropriately moved on the surface to be coated, the thickness of the colored paint is increased on the uphill slope, and the colored paint is thinned on the downhill slope. Thus, the thickness of the colored paint (and the colored layer obtained by curing the colored paint) can be changed.

  Furthermore, in any one of the above-described methods for producing a coated product, the colored paint may be a method for producing a painted product having a transparency T of 20% or more.

  When painted with a colored paint with low transparency, the color of the surface to be painted (substrate surface or underlying colored layer) is hidden by the colored paint (colored layer) even when the colored paint (colored layer) is thinned. The gradation may not be obtained. Furthermore, since it is difficult for a difference in color density to occur between the climbing slope and the descending slope, it is difficult to make the unevenness of the painted surface stand out.

  On the other hand, in the manufacturing method of the present invention, a colored paint having a transparency T of 20% or more is used. As a result, the color of the surface to be painted (base surface or base colored layer) is not concealed by the color paint (colored layer), so the color difference between the color paint (colored layer) and the surface to be painted is used. Can be obtained appropriately. Furthermore, since the uphill slope can be darkened appropriately as compared with the downhill slope, the unevenness of the surface to be painted (painted surface) can be made to stand out.

  The transparency T is a value defined as follows. Using a 4 mil applicator, the colored paint was applied to black and white concealment ratio measurement art paper and cured. In the sample, the lightness of the painted area on the white ground of the art paper was ΔL1, and the lightness of the painted area on the black ground was ΔL2. In this case, the lightness ratio ΔLf = ΔL1 / ΔL2 of both painted parts is set. Further, when the lightness of the white background portion of the art paper (not coated with paint) is ΔL3 and the lightness of the black background portion is ΔL4, the lightness ratio ΔLs = ΔL3 / ΔL4 of both unpainted portions. At this time, transparency T = (ΔLf / ΔLs) × 100 (%) is defined. Here, the 4 mil applicator is a device for applying the paint to a thickness of 4 mil (about 0.1 mm). The black and white concealment rate measurement art paper is art paper having a white background portion and a black background portion.

  Furthermore, in the above-described method for producing a coated product, the colored paint may be a method for producing a painted product having the transparency T of 35% or more and 45% or less.

As described above, if the transparency of the colored paint is too low, the color of the surface to be coated (the surface of the substrate or the underlying colored layer) is also affected by the colored paint (colored layer) even in the thinned portion of the colored paint (colored layer). There is a risk that gradation will not be obtained because it is hidden. Furthermore, since it is difficult for a difference in color density to occur between the climbing slope and the descending slope, it is difficult to make the unevenness of the painted surface stand out.
On the other hand, even if the transparency of the colored paint is too high, the color of the surface to be painted (base material surface or underlying colored layer) cannot be concealed in the thickened part of the colored paint (colored layer). The color tone tends to be close to that of the thinned portion of the colored paint (colored layer). Therefore, gradation may not be obtained on the painted surface, and it may be difficult to make the unevenness of the painted surface stand out.

  On the other hand, in the manufacturing method of the present invention, a colored paint having a transparency T of 35% or more and 45% or less is used. For this reason, a change can be suitably produced in the color tone of a coating surface by the difference in the thickness of a colored coating material (colored layer). Therefore, an excellent gradation can be obtained by the color difference between the colored paint (colored layer) and the surface to be coated. Furthermore, since the uphill slope can be darkened appropriately as compared with the downhill slope, the unevenness of the surface to be painted (painted surface) can be made to stand out.

  Furthermore, in any one of the above-described methods for producing a coated product, the colored coating is a coated product comprising 0.5 to 3 (wt%) of pigment and 1 to 9 (wt%) of resin solids. A manufacturing method is preferable.

  In the production method of the present invention, a colored paint containing 0.5 to 3 (wt%) pigment and 1 to 9 (wt%) resin solids is used. Thereby, a change can be suitably produced in the color tone of a coating surface by the difference in the thickness of a colored coating material (colored layer). Therefore, an excellent gradation can be obtained by the color difference between the colored paint (colored layer) and the ground. Furthermore, since the uphill slope can be darkened appropriately as compared with the downhill slope, the unevenness of the surface to be painted (painted surface) can be made to stand out.

  Furthermore, in any one of the above-described methods for producing a coated article, the colored paint is a standard in which the surface to be coated and the colored paint are applied on white art paper using an 8 mil applicator and cured. It is preferable to use a manufacturing method of a coated product that is a colored paint having a color difference ΔE with the colored layer of 7 or more.

As described above, in the manufacturing method of the present invention, the thickness of the colored paint can be changed (increase / decrease) in each part of the surface to be coated, and the thickness of the colored paint (colored layer) can be made different in each part of the surface to be coated. . Accordingly, in the portion where the thickness of the colored layer is thin, the color of the base appears strongly, and on the contrary, in the portion where the thickness of the colored layer is thick, the color of the colored layer (colored paint) appears strongly.
In the production method of the present invention, since the colored paint having a color difference ΔE of 7 or more between the surface to be coated (base surface or underlying colored layer) and the reference colored layer is used, the colored layer has a thin film thickness. It is possible to obtain a clear two-tone color in which the color differs between the thick part and the thick part. Here, the color difference ΔE is a value obtained by ΔE = [(ΔL) ² + (Δa) ² + (Δb) ² ] ^1/2 by the Lab color system.

  In addition, as a surface to be coated, the surface of the base material is used as it is, and a coating film formed on the surface of the base material (for example, a base colored layer obtained by applying another colored paint as a base to the base material surface and curing ) Surface may be used. When the surface to be coated becomes the surface of the base material, a colored paint having a color difference ΔE of 7 or more between the reference colored layer and the base material surface may be used. On the other hand, when the surface to be coated is the surface of the coating film formed on the substrate surface, the reference colored layer and the coating material for the coating film are applied onto white art paper using an 8 mil applicator. Then, a colored paint having a color difference ΔE of 7 or more with respect to the cured reference coating film may be used.

  Furthermore, in any one of the above-described methods for producing a coated product, the colored paint may be a method for producing a coated product containing 3 to 10 (wt%) of a solid content of paint.

  In the production method of the present invention, a colored paint containing 3 to 10 (wt%) of a solid content of a paint such as a pigment is used. In other words, a colored paint is used in which the solid content of the paint such as a pigment is limited to 10 wt% or less, and 97 to 90 (wt%) of a volatile component such as water or a solvent is contained. Thereby, without being affected by the coating environment (air temperature, humidity, substrate temperature, etc.), it is possible to appropriately apply the colored paint in the application process, and appropriately before the colored paint is cured in the blowing process, The colored paint can be moved. Accordingly, it is possible to make the textured surface of the painted surface stand out without being affected by the coating environment (air temperature, humidity, substrate temperature, etc.) and to express a natural texture gradation.

  In addition, the content rate of the paint solid content contained in the colored paint is a content rate in a state where it is applied to the base material, and when the previously prepared colored paint is diluted, the content rate in the diluted colored paint is used. It becomes.

  Furthermore, in any one of the above-described methods for manufacturing a coated object, it is preferable that the surface to be coated be a method for manufacturing a coated object in which convex portions having different projecting heights are irregularly distributed.

  As in the past, after applying colored paint to the whole and then scraping the colored paint on the convex part, the convex part with different projecting heights has an irregularly distributed surface. In the convex portion having a lower height than the other convex portions, the scraped roll cannot be brought into contact with the applied colored paint, and the colored paint may not be scraped off. For this reason, the unevenness | corrugation of the coating surface cannot be made to stand out, and the gradation could not be obtained appropriately.

  On the other hand, in the manufacturing method of this invention, before a colored coating material hardens | cures in a ventilation process, it blows toward a colored coating material and moves a colored coating material by an airflow. For this reason, an airflow can be spread over the surface to be coated without being affected by the unevenness of the surface to be coated, and the colored paint can be appropriately moved. Therefore, even when using an object to be coated that has a surface to be coated in which convex portions with different protrusion heights are irregularly distributed, the unevenness of the surface to be painted can be emphasized and a gradation of natural texture can be expressed. Can be made.

Moreover , the coated material manufactured by the manufacturing method of one of the said coated materials is preferable .

This coated product is a colored layer formed by applying a colored paint to the surface to be coated and then blowing it toward the colored paint before the colored paint is cured, and moving the colored paint on the surface to be painted by an air flow. have. The colored layer thus formed has different thicknesses in each part of the surface to be coated, and in particular, since the surface to be coated has irregularities, the movement of the colored paint is increased in the surface to be coated having irregularities. On the slope, the colored paint is thick, and on the down slope, the colored paint is thin. Therefore, since the ascending slope is darker than the descending slope, this coated article is a coated article in which a feeling of unevenness on the surface to be coated (painted surface) is conspicuous and a natural texture gradation is developed.

In this coated product, various materials such as ceramics, wood material, metal, glass, resin, and paper can be used as the base material, and ceramic building materials can be particularly preferably used.

Further , when a cross-section obtained by cutting a coated object in a predetermined direction is seen, which is a coated object including an object to be coated including uneven surfaces and a colored layer formed on the surface to be coated. Of the inclined surfaces forming the unevenness of the surface to be coated of the object to be coated, the inclined surface facing one side with the apex of the convex portion as the boundary is the first inclined surface, and the inclined surface facing the other side is the second inclined surface When, the colored layer, the thickness of the first colored portion located on the first inclined plane is, the coated article formed by thicker than the thickness of the second colored portion located on the second inclined plane is Is preferred .

In this coated product, the colored layer has a thickness of the first colored portion located on the first inclined surface that is larger than the thickness of the second colored portion located on the second inclined surface. Therefore, since this 1st coloring part becomes darker than this 2nd coloring part, this coating material becomes the coating object which the gradation of the natural texture was expressed while the uneven | corrugated feeling of the coating surface (base material surface) was conspicuous.

  Furthermore, it is said that it is said coated object, Comprising: The said to-be-coated surface of the said to-be-coated object is good to be a coated object by which the convex-shaped part from which protrusion height differs is distributed irregularly.

  Even if convex portions having different protruding heights are irregularly distributed on the surface to be coated of the object to be coated, as described above, the thickness of the first colored portion located on the first inclined surface is the first thickness. Since it is thicker than the thickness of the second colored portion located on the two inclined surfaces, the coated surface (base material surface) has a concavity and convexity, and a painted material with a natural texture gradation.

Another solution is to apply a colored paint, which is prepared by diluting the colored composition for airflow movement and adjusting the solid content to 3 to 10 wt%, on the surface to be coated including the surface to be coated having irregularities, Before the colored paint is cured, air is blown toward the colored paint, the colored paint is moved within the surface to be coated by an air current, and the article to be coated is cut in a predetermined direction. Of the inclined surfaces forming the unevenness of the surface to be coated, the inclined surface facing one side with the apex of the convex portion as the boundary is the first inclined surface, and the inclined surface facing the other side is the second inclined surface. A method of forming a colored layer on the surface to be coated by increasing the thickness of the colored paint located on the first inclined surface as compared with the thickness of the colored paint located on the second inclined surface The gas injection device that injects a gas to form an air flow, A gas stream is formed by jetting gas in a direction including a component in the same direction as the direction in which the accessory moves relative to the gas spray device, and the air stream is applied to the colored paint applied to the surface to be coated. The gas to be ejected from the gas ejecting device in the air blowing process in which the object to be coated is moved relative to the gas ejecting device while being applied, and the portion of the surface to be coated is moved relative to the air flow. The color for airflow movement used in a method in which the angle θ formed by the jet direction of the nozzle and the relative movement direction in which the object to be coated moves relative to the gas jet device satisfies the relationship of 30 ° <θ ≦ 70 ° When the colored composition for airflow transfer is diluted to a solid content of 6 wt%, the viscosity measured using a B-type rotary viscometer at a rotation speed of 60 rpm is 1. 0-3.0P (Poise) It is the coloring composition for airflow movement adjusted to.

The colored composition for airflow transfer according to the present invention was measured using a B-type rotary viscometer at a rotation speed of 60 rpm when the airflow transfer colored composition was diluted to have a solid content of 6 wt%. The viscosity is adjusted to be 1.0 to 3.0 P (poise). If such a colored paint for diluting such an airflow moving coloring composition is used to adjust the solid content to 3 to 10 wt%, the colored paint can be appropriately moved within the surface to be coated by the airflow. it can. As described above, when the colored paint is moved, among the uneven coated surfaces, the colored paint is difficult to move on the slope where the movement of the colored paint is ascending, and the colored paint is easily moved on the slope where it is descended. For this reason, the thickness of the colored paint (and the colored layer obtained by curing the colored paint) can be changed in such a form that the thickness of the colored paint is increased on the ascending slope and the colored paint is reduced on the descending slope. Therefore, if the colored composition for airflow movement of the present invention is used, it becomes possible to obtain a coated product having a natural texture gradation as well as an uneven feeling on the surface to be coated (painted surface).

  Furthermore, it is said coloring composition for airflow movement, Comprising: When the said coloring composition for airflow movement is diluted and the solid content is 6 wt%, it adjusts so that transparency T may be 35% or more and 45% or less It is preferable to use a colored composition for airflow transfer.

  The colored composition for airflow movement of the present invention is adjusted so that the transparency T is 35% or more and 45% or less when the colored composition for airflow movement is diluted to have a solid content of 6 wt%. . If such a colored paint for airflow movement is diluted and a colored paint whose solid content is adjusted to 3 to 10 wt% is used, the difference in thickness of the colored paint (colored layer) is preferable. It is possible to change the color tone. Therefore, an excellent gradation can be obtained by the color difference between the colored paint (colored layer) and the surface to be coated. Furthermore, since the uphill slope can be darkened appropriately as compared with the downhill slope, the unevenness of the surface to be painted (painted surface) can be made to stand out.

Another solution is to apply the airflow moving coloring paint to the surface to be coated including the surface to be coated having irregularities, and before the airflow moving coloring paint is cured, the airflow moving coloring. The unevenness of the surface to be coated of the object to be painted is cut in a predetermined direction by blowing the air toward the paint, moving the colored paint for airflow movement within the surface to be painted by an air current, and cutting the object to be coated in a predetermined direction. On the first inclined surface, the inclined surface facing one side with the apex of the convex portion as the boundary is the first inclined surface, and the inclined surface facing the other side is the second inclined surface. A method of forming a colored layer on the surface to be coated by increasing the thickness of the colored paint positioned relative to the thickness of the colored paint positioned on the second inclined surface , wherein a gas is injected The above-mentioned object to be coated can be The object to be coated is formed by injecting a gas in a direction including a component in the same direction as the direction of movement relative to the object, forming an air current, and applying the air current to the colored paint applied to the surface to be coated. In the air blowing step of moving the portion of the surface to be coated that is exposed to the airflow relative to the gas injection device, and the direction of the gas injected from the gas injection device, A colored paint for airflow movement used in a method in which an angle θ formed by a relative movement direction in which a coated object moves relative to the gas injection device satisfies a relationship of 30 ° <θ ≦ 70 °, This is a colored paint for airflow movement having a viscosity measured at a rotational speed of 60 rpm using a rotary viscometer of 1.0 to 3.0 P (poise).

  The colored coating material for airflow movement of the present invention has a viscosity of 1.0 to 3.0 P (poise) measured using a B-type rotary viscometer at a rotation speed of 60 rpm. For this reason, when it blows toward the colored paint for airflow movement applied to the surface to be coated, the colored paint for airflow movement can be appropriately moved within the surface to be coated by the airflow. As described above, when the colored paint is moved, among the uneven coated surfaces, the colored paint is difficult to move on the slope where the movement of the colored paint is ascending, and the colored paint is easily moved on the slope where it is descended. For this reason, the thickness of the colored paint (and the colored layer obtained by curing the colored paint) can be changed in such a form that the thickness of the colored paint is increased on the ascending slope and the colored paint is reduced on the descending slope. Therefore, if the colored paint for airflow movement according to the present invention is used, it is possible to obtain a coated product having a natural texture gradation as well as an uneven feeling on the surface to be coated (painted surface).

Furthermore, it is preferable to use the above-mentioned colored paint for airflow movement, wherein the transparency T is 35% or more and 45% or less.
By using a colored paint for airflow movement having a transparency T of 35% or more and 45% or less, the color tone of the painted surface can be suitably changed due to the difference in thickness of the colored paint for airflow movement (colored layer). . Therefore, an excellent gradation can be obtained due to the color difference between the colored paint for moving airflow (colored layer) and the surface to be coated. Furthermore, since the uphill slope can be darkened appropriately as compared with the downhill slope, the unevenness of the surface to be painted (painted surface) can be made to stand out.

  Furthermore, as another solution, the above-described object to be coated including a surface to be coated having a concavo-convex surface is obtained by diluting the color composition for moving an air current to be judged and adjusting the solid content to 3 to 10 wt%. Applying to the surface to be painted, before the colored paint is cured, blown toward the colored paint, move the colored paint within the surface to be painted by air current, and make the thickness of the colored paint non-uniform , A determination method for determining whether or not it is suitable for a colored composition for airflow movement that forms a colored layer on the surface to be coated, wherein the determined colored composition is diluted so that its solid content is 6 wt% When the viscosity measured at a rotational speed of 60 rpm using a B-type rotary viscometer is 1.0 to 3.0 P (poise), the color composition to be judged is a colored composition for airflow movement. Of suitability for coloring composition for airflow movement Preferably in the law.

  As described above, a colored composition having a viscosity of 1.0 to 3.0 P (poise) when the solid content is 6 wt% can be appropriately used as a colored composition for airflow movement. Therefore, in the determination method of the present invention, when the coloring composition to be determined is diluted to have a solid content of 6 wt%, the viscosity measured at a rotation speed of 60 rpm using a B-type rotary viscometer is 1 If it is 0.0 to 3.0 P (poise), it is determined that the color composition to be judged is suitable for the color composition for airflow transfer. If this determination method is used, the paint is actually applied onto the surface to be coated, moved within the surface to be coated by an air current, and appropriately used as a colored composition for airflow movement simply and without determining the suitability. You can know if you can.

Embodiments of the present invention will be described below.
Example 1
The manufacturing method of the coated object 100 (refer FIG. 6) concerning the present Example 1 is demonstrated, referring drawings.

  First, the base material 110 of the coated object 100 of the first embodiment is prepared. FIG. 1A is a top view of the substrate 110, and FIG. This base material 110 is a ceramic building material having a length (horizontal direction in FIG. 1A) of 300 mm × horizontal (vertical direction in FIG. 1A) 250 mm × thickness of 10 mm, as shown in FIG. Are provided with a substrate surface 110b having irregularities. On the substrate surface 110b, convex portions (111, 112, 113, etc.) having different protruding heights are irregularly distributed. Specifically, for example, as shown in FIG. 1B, the protruding portions 111, the protruding portions 112, and the protruding portions 113 have different protruding heights.

(Formulation of the first colored paint)
Next, a first colored paint was prepared. As shown in Table 1, this first colored paint has an emulsion of 20 wt% (resin solids conversion value), tap water of 50 wt%, an organic solvent of 5 wt%, a viscosity modifier of 5 wt%, and a colored paste of 15 wt%. (Pigment solid content conversion value) and an auxiliary agent are included at a ratio of 5 wt%. Among these, the emulsion is an emulsion in which an acrylic resin (oil) is dispersed in water. The colored paste is a suspension in which a colored pigment (cream color) such as titanium oxide or iron oxide is dispersed in water. The auxiliary agent includes an antifoaming agent, a preservative, a pH adjuster, and a drying adjuster.

(Preparation of second colored paint)
Next, a second colored paint was prepared. First, an undiluted coating material used as a base for the second colored coating material was manufactured.
As shown in Table 2, this undiluted paint has an aqueous acrylic emulsion of 5.81 wt% in terms of solid content, tap water of 86.08 wt%, a colored paste of 1.62 wt% in terms of pigment solid content, and an organic solvent of 5%. .81 wt%, Additive 1 at a solid content conversion of 0.2 wt%, Additive 2 at a solid content conversion of 0.34 wt%, and a viscosity modifier at a solid content conversion of 0.14 wt%.

  The aqueous acrylic emulsion is contained for the purpose of protecting the colored pigment and forming a colored layer. The colored paste is a suspension in which iron oxide (yellow, brown) having a small particle diameter is used as a color pigment and is dispersed in water. The organic solvent consists of butyl cellosolve and dipropylene glycol mononormal butyl ether, and is contained for the purpose of improving the film forming property. Additive 1 is an additive containing a surfactant, an ultraviolet absorber, and the like, and is added for the purpose of defoaming and stabilizing the paint, improving the smoothness of the colored layer, and preventing deterioration. Additive 2 is a synthetic smectite and is contained for the purpose of stabilizing the paint. The viscosity modifier is an alkali-soluble thickener. As the organic solvent, any organic solvent known as a film forming aid can be used.

  Such undiluted paint was diluted with tap water to have a non-volatile content of 6 wt% as a second colored paint. Here, Table 3 shows the component content of the second colored paint.

  The viscosity of this second colored paint was measured using a B-type rotary viscometer (manufactured by Tokyo Keiso Co., Ltd., BM-type viscometer) at a rotation speed of 60 rpm, and it was 1.5 P (poise). It was. In Example 1, the raw material paint corresponds to the colored composition for airflow movement, and the second colored paint corresponds to the colored paint for airflow movement.

(Measurement of transparency T of the second colored paint)
Further, the transparency T of the second colored paint was measured and found to be 40%. In Example 1, the transparency T of the second colored paint was obtained as follows. First, the second colored paint is applied to black-and-white concealment rate measuring art paper using a 4 mil applicator and cured to prepare a sample. Next, in this sample, a colorimeter (manufactured by HunterLab, Miniscan XE plus) was used, and a lightness ratio ΔLf (ΔLf) between the lightness ΔL1 of the white ground painted portion of the art paper and the lightness ΔL2 of the black painted portion. = ΔL1 / ΔL2) is measured. Similarly, the lightness ratio ΔLs (ΔLs = ΔL3 / ΔL4) between the lightness ΔL3 of the white background portion of the art paper to which the second colored paint is not applied and the lightness ΔL4 of the black background portion is measured. At this time, transparency T = (ΔLf / ΔLs) × 100 (%). Here, the 4 mil applicator is a device for applying the paint to a thickness of 4 mil (about 0.1 mm). The black and white concealment rate measurement art paper is art paper having a white background portion and a black background portion.

(Measurement of the color difference between the first colored paint film and the second colored paint film)
Further, when the color difference ΔE between the coating film obtained by curing the first colored paint (reference coating film) and the coating film obtained by curing the second colored paint (reference colored layer) was measured, ΔE = 35 was obtained. In Example 1, the color difference ΔE was obtained as follows. First, using a 8 mil applicator, the first colored paint and the second colored paint were respectively applied onto white art paper and cured to prepare samples (reference coating film and reference colored layer). In this sample, using a colorimeter (manufactured by HunterLab, Miniscan XE plus), a coating film obtained by curing the first colored paint (reference coating film) and a coating film obtained by curing the second colored paint (reference colored layer). And the color difference was measured. The color difference ΔE is a value calculated by the Lab color system as ΔE = [(ΔL) ² + (Δa) ² + (Δb) ² ] ^1/2 .

(Painting process)
Next, the first and second colored paints are applied to the substrate surface 110b of the substrate 110 to form the first and second colored layers 120 and 130, thereby producing the coated object 100 (see FIG. 6). did. Below, the coating process (a colored layer formation process is included) of the present Example 1 is demonstrated concretely. In addition, below, the thing used for the coating process including the base material 110 is also called a workpiece | work.

First, the first colored paint was applied to the substrate surface 110b of the substrate 110 and cured to form the first colored layer 120 (underlying colored layer). Specifically, first, the substrate 110 is heated to raise the temperature of the substrate surface 110b to 50 ° C., and then the first colored paint is applied with an air spray at an application amount of 9 g / (30 cm) ^2. Was applied to the substrate surface 110b. Next, after leaving at room temperature for 90 seconds, the coated surface of the workpiece was dried with hot air for 90 seconds using a jet dryer set at 100 ° C. Thereby, while raising the temperature of a workpiece | work to 60 degreeC, as shown in FIG. 2, the 1st colored coating material apply | coated to the base-material surface 110b was hardened, and the 1st colored layer 120 was formed.

Here, an object in which the first colored layer 120 is formed on the substrate surface 110b of the substrate 110 is defined as an object 101 to be coated. Further, the surface of the first colored layer 120 that forms the surface of the object 101 is a surface to be coated 120b.
In addition, the to-be-coated surface 120b of the to-be-coated object 101 became an uneven shape along the substrate surface 110b, as shown in FIG. Specifically, the convex portions 121, 122, 123 and the like having different projecting heights along the convex portions 111, 112, 113, and the like of the base material 110 were irregularly distributed.

(Colored layer formation process)
Next, using the coating apparatus 140 shown in FIG. 3, the second colored paint is applied and cured on the surface 120b of the object 101 to be coated, and the second colored layer 130 is formed as shown in FIG. Formed.
First, the coating apparatus 140 will be described. The coating device 140 includes a transport device 170 that transports a workpiece, an airless spray 150 that sprays the second colored paint, and a gas spray device 160 that sprays gas (air in the first embodiment).

The conveyance device 170 can convey a workpiece at a speed of 20 to 60 (m / min) in the horizontal direction from right to left in FIG. 3. In Example 1, the conveyance speed V was set to 35 (m / min). The airless spray 150 is installed at a position separated by H1 in the vertical direction from the surface of the workpiece (the surface to be coated 120b) conveyed by the conveying device 170, and the entire surface to be painted 120b can be uniformly painted. An airless chip 151 is provided. In this airless spray 150, 6-14 (g / (30 cm) ² ) of the second colored paint is applied to the surface of the workpiece (surface 120b to be coated) conveyed at a speed of 20-60 (m / min). It can be applied in a coating amount. In the first embodiment, the discharge pressure of the airless chip 151 is adjusted so that the application amount of the second colored paint is 10 g / (30 cm) ² .

  As illustrated in FIG. 4B, the gas injection device 160 includes a nozzle 161, a hose 162, and a pressure gauge 163. Among these, the nozzle 161 has a lateral dimension larger than the lateral dimension (250 mm) of the workpiece (base 110) as shown in FIG. 4A, and has a width W as shown in FIG. A slit-shaped gas injection port 161b extending in the lateral direction and a gas introduction port 161c for introducing gas (air in the first embodiment) from the outside are provided. The hose 162 connects the gas inlet 162 and an air compressor (not shown). For this reason, compressed air compressed by an air compressor (not shown) can be supplied into the nozzle 161. The pressure gauge 163 is connected in the middle of the hose 163 and can measure the pressure of the compressed air supplied to the inside of the nozzle 161 (differential pressure from the external atmospheric pressure).

In the first embodiment, the value of the pressure gauge 163, that is, the pressure of the compressed air is set to 0.075 (MPa). Therefore, in the first embodiment, the internal pressure P of the nozzle 161 can be 0.075 MPa higher than the external air pressure, and gas (air in the first embodiment) can be injected from the gas injection port 161b. Further, the slit width W of the gas injection port 161b is set to 0.15 mm. At this time, the flow rate Q of the air injected from the gas injection port 161b is 55 (m ³ / h).

In the gas injection device 160, the gas injection port 161 b is separated from the airless spray 150 by D in the horizontal direction from right to left in FIG. 3, and from the surface of the workpiece conveyed by the conveyance device 170 in the vertical direction. It is fixed at a distance above H2. In addition, the gas injection device 160 is installed by inclining the injection direction of the compressed air by an angle θ (<90 °) with respect to the horizontal direction (workpiece traveling direction). Therefore, the gas injection device 160 injects gas in the direction including the component in the same direction as the movement direction of the workpiece (the object 101) (horizontal component from right to left in FIG. 3), and the air current layer 165. Can be formed.
In Example 1, D = 500 (mm), θ = 60 (°), and H2 = 3.0 (cm).

In Example 1, the second colored paint 130 was formed by applying the second colored paint as described below using the coating apparatus 140 described above.
First, after confirming that the surface temperature of the article to be coated 101 has decreased to 55 ° C., the conveying device 170 horizontally moves from right to left in FIG. 3 at a conveying speed V = 35 (m / min). The work (object 101) is conveyed. Then, since the workpiece (object 101) passes from the left end 110d side through the spray pattern 155 of the second colored paint sprayed from the airless spray 150, the workpiece (surface to be coated 120b) is passed through. A second colored paint is applied. As a result, the second colored paint is applied to the surface to be coated 120b (the surface of the first colored layer 120) at a coating amount of 10 g / (30 cm) ² , and as shown in FIG. Layer 131 (a layer of uncured second colored paint) could be formed.
As described above, the step of applying the second colored paint to the surface 120b of the first colored layer 120 corresponds to the applying step.

  Subsequently, the workpiece is conveyed from the right to the left in FIG. 3 by the conveying device 170 and passes through the airflow layer 165 formed by the gas injection device 160. Thus, in order from the left end 110d side of the workpiece, the second colored paint is applied to the second colored paint applied to the painted surface 120b (the surface of the first colored layer 120) in the painted surface 120b while applying an air flow to the painted surface 120b. Was able to move. Specifically, the thickness of the second colored paint could be made nonuniform by moving the second colored paint in the direction from left to right in FIG. 5 within the surface to be coated 120b (FIG. 6). reference).

  In particular, in Example 1, as described above, the surface to be coated 120b has a concavo-convex shape in which the convex portions 121, 122, 123, etc. are irregularly distributed (see FIG. 5). Therefore, as shown in FIG. 5, the second colored paint is difficult to move on the first inclined surfaces 121b, 122b, and 123b in which the movement of the second colored paint is the upside of the surface 120b to be coated. The second colored paint easily moves on the two inclined surfaces 121c, 122c, and 123c. For this reason, as shown in FIG. 6, the thickness of the second colored paint (wet layer 131) is increased by increasing the second colored paint on the first inclined surfaces 121b, 122b, and 123b. On the other hand, on the second inclined surfaces 121c, 122c, and 123c, the thickness of the second colored paint (wet layer 131) is reduced by decreasing the second colored paint.

  By the way, as described above, the surface 120b of the object 101 has an uneven shape in which convex portions (121, 122, 123, etc.) having different protrusion heights are irregularly distributed (FIG. 2). reference). For this reason, after applying the second colored paint, and using a conventional method of scraping the colored paint of the convex portion, when trying to thin the coating film of the convex portion, other convex portions There is a possibility that the scraping roll cannot be brought into contact with the second colored paint located on the convex portion 123 having a height lower than that of. For this reason, there exists a possibility that the 2nd coloring coating material applied to the area | region of the convex part with low height compared with other convex parts, such as the convex part 123, cannot be scraped off appropriately. Therefore, there is a possibility that a desired finish cannot be obtained on the painted surface.

On the other hand, in the first embodiment, as described above, the airflow is applied to the second colored paint, so that it is applied to the convex portion having a lower height than the other convex portions such as the convex portion 123. The second colored paint that was present could also be moved appropriately. Thereby, the thickness of the second colored paint (wet layer 131) located on the first inclined surfaces 121b, 122b, 123b, etc. is appropriately increased over the entire painted surface to which the airflow is applied, and the second inclined surfaces 121c, 122c, The thickness of the 2nd coloring paint (wet layer 131) located in 123c etc. was able to be made thin (refer FIG. 6). Therefore, the desired finish could be obtained for the painted surface.
As described above, the step of passing the work to which the second colored paint is applied through the airflow layer 165 formed by the gas injection device 160 corresponds to the blowing step. In Example 1, the thickness of the second colored paint (wet layer 131) located on the second inclined surfaces 121c, 122c, 123c, etc. was extremely thin (see FIG. 6).

  Then, after leaving the workpiece at room temperature for 60 seconds, the coated surface of the workpiece (the surface of the wet layer 131 of the second colored paint) was hot-air dried for 90 seconds by a jet dryer set at a temperature of 100 ° C. Thereby, as shown in FIG. 6, the first colored portion 130b located on the first inclined surface (121b, 122b, 123b, etc.) is thick on the surface to be coated 120b (the surface of the first colored layer 120), The second colored layer 130 in which the second colored portion 130c located on the second inclined surface (121c, 122c, 123c, etc.) was thinned could be formed (thus completing the painted object 100).

  Next, the finished condition of the painted surface of the coated object 100 manufactured as described above was evaluated. In the coated object 100, the color (cream color) of the first colored layer 120 is emphasized on the second inclined surface (121c, 122c, 123c, etc.) side, and on the first inclined surface (121b, 122b, 123b etc.) side, The color (brown color) of the second colored layer 130 was emphasized. Thereby, as a tendency of the entire painted surface, the color on the second inclined surface (121c, 122c, 123c, etc.) side becomes brighter than the first inclined surface (121b, 122b, 123b etc.) side, and the unevenness of the surface is conspicuous. I saw. Furthermore, a natural texture gradation was developed between the first inclined surface (121b, 122b, 123b etc.) side and the second inclined surface (121c, 122c, 123c etc.) side. More specifically, an excellent two-tone gradation can be obtained by the color difference between the second colored layer 130 and the first colored layer 120 as a base.

(Example 2)
In the present Example 2, compared with Example 1, six types of coated products (samples 1 to 6) differing only in the transparency T of the second colored layer 130 (second colored paint) were produced. Specifically, in Example 1, the transparency T of the second colored layer 130 (second colored paint) was 40%, but in this Example 2, the content of the colored paste among the components of the second colored paint. , Respectively, to make the transparency T different from that of Example 1.

In sample 1, the transparency T was set to 16 by setting the content of the colored paste (pigment solid content converted value) to 2.2 wt% (at this time, the content of tap water was adjusted to 88.3 wt%). %.
In sample 2, the transparency T is 25 by setting the content of the colored paste (in terms of pigment solid content) to 1.8 wt% (at this time, the content of tap water is adjusted to 88.7 wt%). %.
In sample 3, the transparency T is 30 by setting the content of the colored paste (pigment solid content converted value) to 1.5 wt% (at this time, the content of tap water is adjusted to 89.0 wt%). %.

In the sample 4, the transparency T is 35 by setting the content of the colored paste (pigment solid content converted value) to 1.4 wt% (at this time, the content of tap water is adjusted to 89.1 wt%). %.
In sample 5, the content T of the colored paste (pigment solid content converted value) is 1.0 wt% (at this time, the content of tap water is adjusted to 89.5 wt%), so that the transparency T is 45. %.
In the sample 6, the transparency T is 50 by setting the content rate (colored pigment solid content converted value) of the colored paste to 0.7 wt% (at this time, the content rate of tap water is adjusted to 89.8 wt%). %.

In the samples 1 to 6 as described above, similarly to the coated object 100 of the first embodiment, the first position located on the first inclined surface (121b, 122b, 123b, etc.) on the surface 120b of the first colored layer 120. The second colored layer 130 in which the colored portion 130b was thick and the second colored portion 130c located on the second inclined surface (121c, 122c, 123c, etc.) was thinned could be formed (see FIG. 6).
Here, about the samples 1-6, the finishing condition of the coating surface was evaluated. The results are shown in Table 4 in comparison with the coated object 100 of Example 1. In addition, the evaluation of the finish was evaluated in five stages of A to E.

As shown in Table 4, it was confirmed that there was a difference in the finish of the painted surface due to the difference in the transparency T of the second colored paint (second colored layer 130).
In sample 1, the evaluation of the finish of the painted surface was the lowest E. Specifically, since the transparency T of the second colored paint (second colored layer 130) is low, the color of the first colored layer 120 as a base is also in the convex portion where the thickness of the second colored layer 130 is reduced. There was a strong tendency to be concealed. Furthermore, the shade of the color due to the difference in thickness of the second colored layer 130 is not clear, and a gradation cannot be obtained appropriately. In addition, the unevenness of the painted surface was not good.

In sample 2, the evaluation of the finish of the painted surface was D. Specifically, since the transparency T of the second colored paint (second colored layer 130) is low, the second inclined surface (121c, 122c, 123c, etc.) side where the thickness of the second colored layer 130 is reduced is also provided. There was a tendency that the color of the first colored layer 120 as a base was concealed. However, overall, gradation could be obtained between the first inclined surface (121b, 122b, 123b etc.) side and the second inclined surface (121c, 122c, 123c etc.) side.
In Sample 3, the evaluation of the finish of the painted surface was C. Specifically, although there is a portion where the color of the underlying first colored layer 120 is concealed on the second inclined surface (121c, 122c, 123c, etc.) side where the thickness of the second colored layer 130 is reduced. A gradation could be obtained between the first inclined surface (121b, 122b, 123b etc.) side and the second inclined surface (121c, 122c, 123c etc.) side.

In sample 4, the evaluation of the finish of the painted surface was B. Specifically, the color (cream color) of the first colored layer 120 is strong on the second inclined surface (121c, 122c, 123c, etc.) side, and the second coloring is on the first inclined surface (121b, 122b, 123b etc.) side. As the color (brown color) of the layer 130 appears strongly, the color on the second inclined surface (121c, 122c, 123c, etc.) side becomes brighter than the first inclined surface (121b, 122b, 123b etc.) side, and the surface The concavity and convexity of was visible. Further, a gradation of natural texture appears between the first inclined surface (121b, 122b, 123b etc.) side and the second inclined surface (121c, 122c, 123c etc.) side, and the coated object 100 of Example 1 Although it was slightly inferior to the above, a beautiful finish was obtained.
In the coated object 100 of Example 1, as described above, the surface unevenness is conspicuous, and an excellent gradation of two-tone color can be obtained by the color difference between the second colored layer 130 and the first colored layer 120 as a base. It was. The evaluation of the finish of the painted surface was A, the highest.

In sample 5, the evaluation of the finish of the painted surface was B. Specifically, as compared with sample 4, the color (cream color) of the first colored layer 120 appeared strongly, and a bright color feeling was obtained as a whole. Even in this sample 5, the unevenness of the surface is conspicuous, and a gradation of natural texture appears between the first inclined surface (121b, 122b, 123b etc.) side and the second inclined surface (121c, 122c, 123c etc.) side. I was able to get a beautiful finish.
In sample 6, the evaluation of the finish of the painted surface was C. Specifically, although there is a portion where the color of the underlying first colored layer 120 appears on the first inclined surface (121b, 122b, 123b, etc.) side where the thickness of the second colored layer 130 is increased, A gradation can be obtained between the first inclined surface (121b, 122b, 123b etc.) side and the second inclined surface (121c, 122c, 123c etc.) side.

When the above results are summarized, Sample 1 in which the transparency T of the second colored paint (second colored layer 130) was 16% was not preferable in the surface finish, but Sample 2 in which the transparency T was 25% or more. ~ 6 and Example 1, the surface unevenness is conspicuous, and the natural texture between the first inclined surface (121b, 122b, 123b etc.) side and the second inclined surface (121c, 122c, 123c etc.) side I was able to get a feeling of finish with gradation. Therefore, it can be said that the transparency T of the second colored paint (second colored layer 130) is preferably 20% or more by selecting an intermediate value between the transparency of Sample 1 of 16% and the transparency of Sample 2 of 25%. .
In particular, in Samples 4 and 5 and Example 1, since a beautiful finish could be obtained, the transparency T of the second colored paint (second colored layer 130) should be 35% or more and 45% or less. It can be said that it is more preferable.

(Example 3)
In Example 3, compared to Example 1, the color difference ΔE between the coating film obtained by curing the first colored paint (reference coating film) and the coating film obtained by curing the second colored paint (reference colored layer) is increased. Using three different types of second colored paints, paints (samples 7 to 9) were produced. Specifically, in Samples 7, 8, and 9, the color difference ΔE = 4, 7, and 10 were sequentially set by changing the colored paste (pigment) among the components of the second colored paint. Note that the transparency T of the second colored paint (second colored layer 130) is 40%, as in Example 1.
Here, the results of evaluating the finished condition of the painted surface of Samples 7 to 9 are shown in Table 5 in comparison with the coated product 100 of Example 1. In addition, the evaluation of the finish was evaluated in three stages of A to C.

In sample 7, the evaluation of the surface finish was C, which was the lowest. Specifically, although gradation is obtained between the first inclined surface (121b, 122b, 123b etc.) side and the second inclined surface (121c, 122c, 123c etc.) side, the color change is scarce. In addition, the three-dimensional effect was poor.
In Samples 8 and 9, the evaluation of the surface finish was B. Specifically, between the first inclined surface (121b, 122b, 123b etc.) side and the second inclined surface (121c, 122c, 123c etc.) side, the first colored layer 120 and the second colored layer 130 are arranged. Due to the difference in color, a two-tone gradation was obtained, and a good three-dimensional appearance with a distinctive unevenness could be obtained. In Example 1 (color difference ΔE = 35), an excellent gradation of two-tone color was obtained as described above, and an excellent stereoscopic effect could be obtained.
Based on the above results, a color paint having a color difference ΔE of 7 or more between the paint film (reference paint film) obtained by curing the first color paint and the paint film (reference color layer) obtained by curing the second color paint is used. It can be said that it is preferable.

Example 4
In this Example 4, compared with Example 1, four types of coated products (samples 10 to 13) were manufactured using the second colored paint having a different viscosity. Specifically, the second colored paints used in Samples 10 to 13 each adjusted the viscosity by varying the content of the viscosity modifier. About these 2nd coloring paints, when the viscosity was measured like Example 1, respectively, it was 0.5, 1.0, 3.0, 3.5P in order of the samples 10, 11, 12, and 13. (Poise). Here, the results of evaluating the finished condition of the painted surface of Samples 10 to 13 are shown in Table 6 in comparison with the coated object 100 of Example 1. In addition, the evaluation of the finish was evaluated in three stages of A to C.

In sample 10, the evaluation of the surface finish was the lowest C. Specifically, the unevenness was uneven and the surface finish was not preferable. This is because the fluidity of the second colored paint is too high because the viscosity of the second colored paint is too low, and the form cannot be maintained even if the second colored paint is moved by the air flow. This is because the two-colored paint has flowed to the lower part.
In samples 11 and 12, the evaluation of the surface finish was B. Specifically, although the finish feeling is slightly inferior to the coated object 100 of Example 1, the surface unevenness is conspicuous, and the first inclined surface (121b, 122b, 123b, etc.) side and the second inclined surface (121c). , 122c, 123c, etc.), a natural gradation can be obtained.

In Sample 13, the evaluation of the surface finish was the lowest C. Specifically, the unevenness is weak, and gradation can be appropriately obtained between the first inclined surface (121b, 122b, 123b etc.) side and the second inclined surface (121c, 122c, 123c etc.) side. There wasn't. This is because the viscosity of the second colored paint is too high, the fluidity of the second colored paint is too low, and the second colored paint cannot be moved appropriately by the airflow.
In Example 1 (the viscosity of the second colored paint is 1.5 poise), as described above, an excellent finish feeling was obtained, and the evaluation of the surface finish was A, which was the highest.
From the above results, it can be said that the viscosity of the second colored paint is preferably 1.0 to 3.0 P (poise).

(Example 5)
In this Example 5, compared with Example 1, four types of coated products (samples 14 to 17) were manufactured using a second colored paint having a different content of non-volatile content (paint solid content). Specifically, each of the second colored paints used in samples 14 and 15 uses the raw material paint prepared in Example 1, and increases the amount of tap water to be added to the non-volatile matter (paint solids). The content rate was set to 2, 3 (wt%) in order. In Examples 16 and 17, the content of the non-volatile content (paint solid content) was set to 10, 20 (wt%) in order by increasing the content of the aqueous acrylic emulsion and the colored paste.
Here, the results of evaluating the finished condition of the painted surface of Samples 14 to 17 are shown in Table 7 in comparison with the coated object 100 of Example 1. In addition, the evaluation of the finish was evaluated in three stages of A to C.

In sample 14, the evaluation of the surface finish was the lowest C. Specifically, since the pigment contained in the second colored paint is too small (specifically, the colored paste is less than 0.5 wt%), the color of the second colored layer is weak, and the unevenness and gradation are adequate. It was not obtained. In addition, the content rate of the water-based acrylic emulsion contained in a 2nd coloring coating material shall be less than 1 wt%.
In samples 15 and 16, the evaluation of the surface finish was B. Specifically, although the finish feeling is slightly inferior to the coated object 100 of Example 1, the surface unevenness is conspicuous, and the first inclined surface (121b, 122b, 123b, etc.) side and the second inclined surface (121c). , 122c, 123c, etc.), a natural gradation can be obtained. In Sample 15, for the second colored paint, the content of the colored paste is 0.5 wt%, and the content of the aqueous acrylic emulsion is 1 wt%.

In sample 17, the evaluation of the surface finish was C, which was the lowest. Specifically, the unevenness is weak, and gradation can be appropriately obtained between the first inclined surface (121b, 122b, 123b etc.) side and the second inclined surface (121c, 122c, 123c etc.) side. There wasn't. This is because the second colored paint has too much solid content, so the fluidity of the second colored paint is too low, and the second colored paint cannot be appropriately moved by the airflow. In Sample 17, for the second colored paint, the content of the colored paste is greater than 3 wt%, and the content of the aqueous acrylic emulsion is greater than 9 wt%.
In Example 1 (the solid content of the paint was 6 wt%), as described above, an excellent finish feeling was obtained, and the evaluation of the surface finish was A, which was the highest.

From the above results, it can be said that the content of the non-volatile content (paint solid content) of the second colored paint is preferably 3 to 10 (wt%).
For the second colored paint, the content of the colored paste (pigment) is 0.5 to 3 (wt%) in terms of solid content, and the aqueous acrylic emulsion (resin solid content) is 1 to 9 (wt%) in terms of solid content. It can be said that it is preferable.

(Example 6)
In the sixth embodiment, the internal pressure P (MPa) of the nozzle 161 of the gas injection device 160 shown in FIG. 4 and the workpiece conveyance speed V (m / min) by the conveyance device 170 are made different, so that the second is appropriately performed. The range in which the colored paint can be moved was investigated. Specifically, the internal pressure P of the nozzle 161 is set to 0.027, 0.035, 0.045, 0.055, 0.065, 0.075, 0.085, 0.097, 0.110 (MPa). For each internal pressure P, the workpiece conveyance speed V was changed to three types of 25, 35, and 42 (m / min). Other conditions are the same as those in the first embodiment.

Note that P = 0.075 (MPa) and V = 35 (m / min) are the setting conditions of Example 1. Further, the value of the pressure gauge 163 is used as the internal pressure P of the nozzle 161. Moreover, the internal pressure P of the nozzle 161 was set to 0.027, 0.035, 0.045, 0.055, 0.065, 0.075, 0.085, 0.097, 0.110 (MPa). At this time, the flow rate Q of the air injected from the gas injection port 162 was ³⁰ , 35, 40, 45, 50, 55, 60, 65, and 70 (m ³ / h), respectively.

  Here, after performing the air blowing step under the various setting conditions described above, the appearance of the wet layer 131 of the second colored paint (the layer of the uncured second colored paint) was evaluated for each sample. The results are shown in Table 8. The appearance was evaluated in five stages of A to E. Specifically, the second colored paint can be appropriately moved, and the wet layer 131 has a first inclined surface (121b, 122b, 123b etc.) side and a second inclined surface (121c, 122c, 123c etc.) side. When the difference in thickness between the two was large, the evaluation was A. When the difference in thickness between the first inclined surface side and the second inclined surface side was relatively large, the evaluation was B. Although the 2nd coloring paint was able to be moved, when the difference of the thickness of the 1st inclined surface side and the 2nd inclined surface side was small, it was set as evaluation C. When the second colored paint cannot be moved and there is almost no difference in thickness between the first inclined surface side and the second inclined surface side, the evaluation D was set. On the first inclined surface side, as in the case of the second inclined surface side, when the thickness of the second colored paint has become thin, the evaluation is E.

  When the internal pressure P of the nozzle 161 was set to 0.027 (MPa), the evaluation was D regardless of which value the workpiece conveyance speed V was set to. That is, even if the internal pressure P of the nozzle 161 is 0.027 (MPa), in other words, even if the internal pressure P of the nozzle 161 is 0.027 MPa higher than the external air pressure and the gas is injected from the gas injection port 161b, the second coloring The paint could not be moved. This is presumably because the air pressure layer 165 having a momentum (energy) enough to move the second colored paint could not be formed because the internal pressure P of the nozzle 161 was too low.

  Next, a case where the internal pressure P of the nozzle 161 is increased and P is set to 0.035 (MPa) will be considered. In this case, the evaluation was still D when the work conveyance speed V = 35, 42 (m / min), but when the work conveyance speed V = 25 (m / min), the evaluation was C. became. From this result, if the internal pressure P of the nozzle 161 is set to 0.035 (MPa), in other words, if the internal pressure P of the nozzle 161 is 0.035 MPa higher than the external pressure, and gas is injected from the gas injection port 161b, It can be said that the second colored paint can be appropriately moved.

  Furthermore, the case where the internal pressure P of the nozzle 161 is increased and P is set to 0.045 (MPa) will be considered. In this case, the evaluation was still D when the work conveyance speed V was 42 (m / min), but when the work conveyance speed V was set to 35 (m / min), the evaluation was C and became. Furthermore, when the workpiece conveyance speed V was set to 25 (m / min), the evaluation was A.

  Thereafter, the case where the internal pressure P of the nozzle 161 is increased will be examined for each work conveyance speed V. First, when the workpiece conveyance speed V = 25 (m / min), when the internal pressure P of the nozzle 161 was set to 0.055 and 0.065 (MPa), the evaluation was A in all cases. However, when the internal pressure P is further increased and P = 0.075, 0.085 (MPa), the pressure drops to evaluation C, and when P = 0.097, 0.110 (MPa), the evaluation E is reached. became.

  When the workpiece conveyance speed V = 35 (m / min), when the internal pressure P of the nozzle 161 is set to 0.055, 0.065, and 0.075 (MPa), the evaluation is A. It became. However, when the internal pressure P was further increased, the result was the same as when the workpiece transfer speed V was 25 (m / min). That is, when P = 0.085 (MPa), the evaluation fell to evaluation C, and when P = 0.097, 0.110 (MPa), evaluation E was obtained.

  Further, when the workpiece transfer speed V = 42 (m / min), when the internal pressure P of the nozzle 161 was set to 0.055 (MPa), the evaluation was still D, but P = 0.065. When it was set to (MPa), it was evaluated as C, and when it was set to P = 0.075 (MPa), it was rated as A. However, when the internal pressure P is further increased, the evaluation decreases. When P = 0.085 (MPa), the evaluation is B, and when P = 0.097, 0.110 (MPa), the workpiece is conveyed. Similar to the case where the speed V = 25, 35 (m / min), the evaluation E was obtained.

  From the above results, as the internal pressure P of the nozzle 161 is increased from 0.035 (MPa), the second colored paint is appropriately moved so that the first inclined surface side of the wet layer 131 of the second colored paint is changed. It is thicker and the second inclined surface side can be made thinner. However, when the internal pressure P is further increased with the predetermined value as a boundary, the second colored paint easily moves on the first inclined surface side as well as the second inclined surface side. It was found that the second colored paint was scraped off on both the first inclined surface side and the second inclined surface side.

  Specifically, when the internal pressure P of the nozzle 161 is 0.085 (MPa), the thickness of the wet layer 131 of the second colored paint is about the workpiece conveyance speed V = 35, 42 (m / min). The first inclined surface side can be made thicker than the second inclined surface side. That is, when the internal pressure P of the nozzle 161 is made 0.085 MPa higher than the external air pressure, and the gas is injected from the gas injection port 161b, the second colored paint can be appropriately moved.

  However, when the internal pressure P of the nozzle 161 is 0.097 (MPa) or higher, the evaluation was E regardless of the workpiece conveyance speed V set. That is, when gas is injected from the gas injection port 161b with the internal pressure P of the nozzle 161 being higher than 0.085 MPa than the external pressure, the first inclined surface side is also the same as the second inclined surface side. 2 The thickness of the colored paint has been reduced. In other words, the second colored paint has been scraped off on both the first inclined surface side and the second inclined surface side. This is thought to be because the momentum (energy) of the gas injected from the gas injection port 161b is too large because the internal pressure P of the nozzle 161 is too high.

As described above, by setting the internal pressure P of the nozzle 161 to 0.035 to 0.085 (MPa), the second colored paint is moved, and the thickness of the wet layer 131 of the second colored paint is made non-uniform. Can be said. In other words, the internal pressure P of the nozzle 161 is set higher by 0.035 to 0.085 (MPa) than the external air pressure, and the second colored paint is moved by injecting the gas from the gas injection port 161b. Regarding the thickness of the wet layer 131 of two colored paints, the first inclined surface (121b, 122b, 123b, etc.) side is thickened, and the second inclined surface (121c, 122c,
123c etc.) can be said to be thinner.

  It was also found that the optimum value of the internal pressure P of the nozzle 161 differs depending on the workpiece conveyance speed V. Specifically, when the workpiece conveyance speed V was 25 (m / min), the optimum value of the internal pressure P of the nozzle 161 was 0.055 (MPa). When the workpiece conveyance speed V was 35 (m / min), the optimum value of the internal pressure P of the nozzle 161 was 0.065 (MPa). When the workpiece conveyance speed V was 42 (m / min), the optimum value of the internal pressure P of the nozzle 161 was 0.075 (MPa). From this result, it was found that the optimum value of the internal pressure P of the nozzle 161 is increased as the work conveying speed V is increased.

(Example 7)
In the seventh embodiment, the angle θ (see FIG. 3) formed by the jet direction of the compressed air from the nozzle 161 and the traveling direction of the workpiece is made different from the workpiece conveyance speed V (m / min) by the conveyance device 170. Thus, the range in which the second colored paint can be moved appropriately was investigated. Specifically, the formed angle θ is varied into six types of 90, 70, 60, 45, 35, and 30 (°), and the workpiece conveyance speed V is set to 25, 35, and 42 for each formed angle θ. Different (m / min). Other conditions are the same as those in the first embodiment. Note that θ = 60 (°) and V = 35 (m / min) are the setting conditions of the first embodiment.

  Here, after performing the air blowing step under the various setting conditions described above, the appearance of the wet layer 131 of the second colored paint (the layer of the uncured second colored paint) was evaluated for each sample. The results are shown in Table 9. The appearance was evaluated in five stages A to E in the same manner as in Example 6.

  As shown in Table 9, when the formed angle θ is 90 ° (when gas is injected in a direction orthogonal to the traveling direction of the workpiece), the evaluation is performed regardless of the workpiece conveyance speed V set to any value. Was E. That is, when the angle θ formed is 90 °, the thickness of the second colored paint is reduced on the first inclined surface side as well as on the second inclined surface side. In other words, the second colored paint has been scraped off on both the first inclined surface side and the second inclined surface side.

  Here, considering each work transport speed V, when the work transport speed V is 25 m / min, evaluation A is obtained when θ = 70 °. However, the evaluation decreases at this boundary, and θ = When the angle was 35 °, the evaluation was D. That is, when the angle θ is reduced to 35 °, the second colored paint cannot be moved appropriately.

Further, when the workpiece transfer speed V is 35 m / min, the evaluation C is increased when θ = 70 °, and the evaluation A is obtained when θ = 60 °. When it was set to = 30 °, it was evaluated D. That is, when the angle θ is reduced to 30 °, the second colored paint cannot be moved appropriately.
Further, when the workpiece transfer speed V is 42 m / min, the evaluation C is increased when θ = 60 °, and the evaluation A is obtained when θ = 45 °. When it was set to = 30 °, it was evaluated D. That is, when the angle θ is reduced to 30 °, the second colored paint cannot be moved appropriately.

From the above results, it has been found that the second colored paint cannot be moved appropriately if θ is reduced to 30 ° regardless of the value of the workpiece conveyance speed V.
As described above, the color paint is appropriately moved by setting the angle θ (see FIG. 3) formed by the jet direction of the compressed air from the nozzle 161 and the traveling direction of the work to be 30 ° <θ <90 °. Can be said.

(Example 8)
Example 8 is different from Example 1 only in the base material, and the other manufacturing methods (such as a coating process) are the same. Therefore, the description will focus on the parts different from the first embodiment, and the description of other parts will be omitted or simplified.
Hereinafter, the manufacturing method of the coated object 200 (refer FIG. 10) concerning the present Example 8 is demonstrated, referring drawings.

  First, the base material 210 of the coated object 200 of the eighth embodiment is prepared. 7A is a top view of the substrate 210, and FIG. 7B is a cross-sectional view taken along the line BB. This base material 210, like the base material 110 of Example 1, is 300 mm in length (horizontal direction in FIG. 7A) × width (vertical direction in FIG. 7A) 250 mm × thickness 10 mm. As shown in FIG. 7B, a substrate surface 210b having irregularities is provided.

  Specifically, in the base material 210 of the eighth embodiment, a large number of fine recesses having a groove shape extending in the lateral direction (vertical direction in FIG. 7A) with a width of 1 mm or less and a depth of 1 mm or less are formed. In the central part of the vertical direction (left and right direction in FIG. 7A), a large recess having a groove shape extending in the horizontal direction with a width of 5 mm and a depth of 3 mm is formed. In other words, as shown in FIG. 7B, convex portions (211, 212, 213, etc.) having a height of 1 mm or less and extending in the horizontal direction are arranged in the vertical direction at intervals of 1 mm or less. However, only one central portion in the vertical direction is different from this, and the interval between the adjacent convex portion 211 and the convex portion 212 is as large as 5 mm, and the valley between the convex portion 211 and the convex portion 212 is different. (Recess) is deep.

  Next, the same first colored paint as in Example 1 is prepared, and as shown in FIG. 8, this is applied to the substrate surface 110b of the substrate 110 and cured to form the first colored layer 220 (underlying colored layer). ) Was formed. Here, an object to be coated 201 is a product in which the first colored layer 220 is formed on the substrate surface 210b of the substrate 210. In addition, the surface of the first colored layer 220 that forms the surface of the object 201 is a surface to be coated 220b. In addition, the to-be-coated surface 220b of the to-be-coated object 201 became an uneven shape along the substrate surface 210b, as shown in FIG. Specifically, it has a concavo-convex shape in which convex portions 221, 222, 223 and the like are arranged along the convex portions 211, 212, 213 and the like of the base 210.

Subsequently, it progresses to a colored layer formation process, the 2nd colored paint same as Example 1 is prepared, and the 2nd colored paint is apply | coated on the to-be-coated surface 220b of the to-be-coated object 201 using the coating apparatus 140 shown in FIG. And cured to form a second colored layer 230 as shown in FIG.
Specifically, as shown in FIG. 3, as in the first embodiment, the transfer device 170 causes the workpiece (covered object) to be conveyed at a transfer speed V = 35 (m / min) in the horizontal direction from right to left in FIG. The coated object 201) was conveyed, and the spray pattern 155 of the second colored paint sprayed from the airless spray 150 was sequentially passed from the left end 210d side of the work (see FIG. 7). As a result, the second colored paint is applied to the surface to be coated 220b (the surface of the first colored layer 220) at an application amount of 10 g / (30 cm) ^{2. As} shown in FIG. 9, the second colored paint is wet. Layer 231 (an uncured second colored paint layer) was formed.

  Subsequently, similarly to the first embodiment, the workpiece is conveyed from the right to the left in FIG. 3 by the conveying device 170, and is formed by the gas injection device 160 sequentially from the left end 210d side of the workpiece (see FIG. 7). The airflow layer 165 was passed through. Thereby, in order from the left end side of the work, the second colored paint is applied within the surface to be coated 220b while applying an air flow to the second colored paint applied to the surface to be coated 220b (the surface of the first colored layer 220). I was able to move it. Specifically, the thickness of the second colored paint could be made nonuniform by moving the second colored paint in the direction from left to right in FIG. 9 within the surface to be coated 220b (FIG. 10). reference).

  Also in Example 8, as described above, the surface to be coated 220b has an uneven shape in which convex portions 221, 222, 223 and the like are distributed (see FIG. 9). Therefore, as shown in FIG. 9, the second colored paint is difficult to move on the first inclined surfaces 221 b, 222 b, 223 b, etc. in which the movement of the second colored paint climbs out of the surface to be coated 220 b, and goes down. The second colored paint easily moves on the second inclined surfaces 221c, 222c, 223c, and the like. For this reason, as shown in FIG. 10, on the first inclined surfaces 221b, 222b, 223b, etc., the thickness of the second colored paint (wet layer 231) is increased by increasing the second colored paint. On the other hand, on the second inclined surfaces 221c, 222c, and 223c, the thickness of the second colored paint (wet layer 231) is reduced by decreasing the second colored paint.

  Thereafter, the work was dried in the same manner as in Example 1. Thereby, as shown in FIG. 10, the first colored portion 230b located on the first inclined surface (221b, 222b, 223b, etc.) is thick on the surface to be coated 220b (the surface of the first colored layer 220), A second colored layer 230 in which the second colored portion 230c located on the second inclined surface (221c, 222c, 223c, etc.) was thin could be formed (thus completing the coated product 200).

  Next, the finished condition of the painted surface of the coated object 200 manufactured as described above was evaluated. Also in the coated object 200 of the eighth embodiment, the color (cream color) of the first colored layer 220 is emphasized on the second inclined surface (221c, 222c, 223c, etc.) side as in the coated object 100 of the first embodiment. The color (brown color) of the second colored layer 230 is emphasized on the first inclined surface (221b, 222b, 223b, etc.) side. Thereby, as a tendency of the entire painted surface, the color on the second inclined surface (221c, 222c, 223c, etc.) side becomes brighter than the first inclined surface (221b, 222b, 223b etc.) side, and the unevenness of the surface stands out. I saw. Furthermore, a gradation of natural texture was expressed between the second inclined surface (221b, 222b, 223b etc.) side and the second inclined surface (221c, 222c, 223c etc.) side. More specifically, an excellent two-tone gradation can be obtained due to the color difference between the second colored layer 230 and the first colored layer 220 as a base.

Example 9
This Example 9 is different from Example 1 only in the base material, and the other manufacturing methods (such as a coating process) are the same. Therefore, the description will focus on the parts different from the first embodiment, and the description of other parts will be omitted or simplified.
Hereinafter, the manufacturing method of the coated object 300 (refer FIG. 14) concerning the present Example 9 is demonstrated, referring drawings.

  First, the base material 310 of the coated object 300 of the ninth embodiment is prepared. FIG. 11A is a top view of the substrate 310, and FIG. 11B is a sectional view taken along the line C-C. This base material 310, like the base material 110 of Example 1, is 300 mm long (horizontal direction in FIG. 11A) × horizontal (vertical direction in FIG. 11A) 250 mm × thickness 10 mm. As shown in FIG. 11B, the substrate surface 310b having irregularities is provided. Specifically, the substrate surface 310b has a concavo-convex shape in which approximately hemispherical convex portions (311, 312, 313, etc.) having a height of 1 to 5 mm are distributed.

  Next, the same first colored paint as in Example 1 is prepared, and as shown in FIG. 12, this is applied to the substrate surface 310b of the substrate 310 and cured to form the first colored layer 320 (underlying colored layer). ) Was formed. Here, a product in which the first colored layer 320 is formed on the base material surface 310 b of the base material 310 is referred to as an object 301 to be coated. Further, the surface of the first colored layer 320 that forms the surface of the article 301 to be coated is referred to as a surface to be coated 320b. In addition, the to-be-coated surface 320b of the to-be-coated object 301 became uneven | corrugated shape along the base-material surface 310b, as shown in FIG. Specifically, the projections 321, 322, 323, etc. were distributed along the projections 311, 312, 313, etc. of the substrate 310.

Next, the process proceeds to a colored layer forming step, where the same second colored paint as in Example 1 is prepared, and the second colored paint is applied onto the surface 320b to be painted using the coating apparatus 140 shown in FIG. And cured to form a second colored layer 330 as shown in FIG.
Specifically, as shown in FIG. 3, as in the first embodiment, the transfer device 170 causes the workpiece (covered object) to be conveyed at a transfer speed V = 35 (m / min) in the horizontal direction from right to left in FIG. The coated object 301) was conveyed, and the spray pattern 155 of the second colored paint sprayed from the airless spray 150 was sequentially passed from the left end 310d side of the workpiece (see FIG. 11). As a result, the second colored paint is applied to the surface to be coated 320b (the surface of the first colored layer 320) at an application amount of 10 g / (30 cm) ^{2. As} shown in FIG. 13, the second colored paint is wet. Layer 331 (a layer of uncured second colored paint) was formed.

  Subsequently, similarly to the first embodiment, the workpiece is conveyed from the right to the left in FIG. 3 by the conveying device 170, and is formed by the gas injection device 160 in order from the left end 310d side of the workpiece (see FIG. 11). The airflow layer 165 was passed through. Accordingly, in order from the left end side of the workpiece, the second colored paint is applied within the surface to be coated 320b while applying an air flow to the second colored paint applied to the surface to be coated 320b (the surface of the first colored layer 320). I was able to move it. Specifically, the thickness of the second colored paint could be made nonuniform by moving the second colored paint in the direction from left to right in FIG. 13 within the surface to be coated 320b (FIG. 14). reference).

  Also in the ninth embodiment, as described above, the surface 320b to be coated has an uneven shape in which convex portions 321, 322, 323 and the like are distributed (see FIG. 12). Therefore, as shown in FIG. 13, the second colored paint (wet layer 331) moves on the first inclined surfaces 321b, 322b, 323b, etc., in which the movement of the second colored paint climbs out of the surface to be coated 320b. It is difficult, and the second colored paint (wet layer 331) easily moves on the second inclined surfaces 321c, 322c, 323c, and the like that descend. Therefore, as shown in FIG. 14, on the first inclined surfaces 321b, 322b, 323b, etc., the thickness of the second colored paint (wet layer 331) is increased due to an increase in the second colored paint. On the other hand, on the second inclined surfaces 321c, 322c, and 323c, the thickness of the second colored paint (wet layer 331) is reduced by decreasing the second colored paint.

  Thereafter, the work was dried in the same manner as in Example 1. Thereby, as shown in FIG. 14, the first colored portion 330b located on the first inclined surface (321b, 322b, 323b, etc.) is thick on the surface to be coated 320b (the surface of the first colored layer 320), A second colored layer 330 having a thin second colored portion 330c located on the second inclined surface (321c, 322c, 323c, etc.) could be formed (thus completing the coated object 300).

  Next, the finished condition of the painted surface of the coated object 300 manufactured as described above was evaluated. Also in the coated object 300 of the ninth embodiment, the color (cream color) of the first colored layer 320 is emphasized on the second inclined surface (321c, 322c, 323c, etc.) side as in the coated object 100 of the first embodiment. On the first inclined surface (321b, 322b, 323b, etc.) side, the color (brown color) of the second colored layer 330 is emphasized. Thereby, as a tendency of the entire painted surface, the color on the second inclined surface (321c, 322c, 323c, etc.) side becomes brighter than the first inclined surface (321b, 322b, 323b etc.) side, and the unevenness of the surface is conspicuous. I saw. Furthermore, a gradation of natural texture was expressed between the second inclined surface (321b, 322b, 323b, etc.) side and the second inclined surface (321c, 322c, 323c, etc.) side. Specifically, an excellent gradation of two-tone color could be obtained by the color difference between the second colored layer 330 and the first colored layer 320 as a base.

In the above, the present invention has been described with reference to the first to ninth embodiments. However, the present invention is not limited to the above-described embodiments, and it can be applied as appropriate without departing from the scope of the present invention. Nor.
For example, in Examples 1 to 9, as shown in FIG. 4A, a gas injection device 160 including a nozzle 161 having a lateral dimension larger than the lateral dimension of a workpiece (base material 110 or the like) is used, and a slit shape is used. The longitudinal direction of the gas injection port 161b was arranged in a direction orthogonal to the traveling direction of the workpiece (base material 110 or the like) in a top view. However, as shown in FIG. 15A, the longitudinal direction of the nozzle 161 having the slit-shaped gas injection port 161b is arranged in a direction obliquely intersecting with the advancing direction of the workpiece (base 110, etc.) in a top view. You may make it do. Further, as shown in FIGS. 15B and 15C, two nozzles 161 may be arranged in parallel. In this way, by making the arrangement and number of nozzles different, it is possible to obtain a finished feeling with a different texture.

Further, as shown in FIG. 15 (d), four nozzles 261 having a lateral dimension smaller than the lateral dimension of the work (base material 110 or the like) are used, and the longitudinal direction of the nozzle 261 is viewed from above with the work (base material). 110, etc.) may be arranged in parallel so as to obliquely intersect the traveling direction.
Further, as shown in FIG. 15E, the two nozzles 361 may be arranged in a V shape when viewed from above. Further, as shown in FIG. 15 (f), six sets of nozzles 461 having a small lateral dimension may be used, and two sets of two sets arranged in a V shape in top view may be arranged.

  Further, as shown in FIG. 15 (g), only one nozzle 461 is used, and the longitudinal direction of the nozzle 461 is a traveling direction of the workpiece (such as the substrate 110) from the right side to the left side in the top view. It may be arranged in a direction orthogonal to (direction) and repeatedly reciprocated in a direction (vertical direction in the drawing) orthogonal to the traveling direction of the workpiece (base material 110 or the like). Alternatively, as shown in FIG. 15 (h), the longitudinal direction of the nozzle 461 is arranged in a direction obliquely intersecting the advancing direction of the work (base material 110 or the like) in a top view, and this is arranged on the work (base material). 110, etc.) may be repeatedly reciprocated in a direction (vertical direction in the figure) perpendicular to the traveling direction.

In Examples 1 to 9, ceramic building materials are used as the base materials 110, 210, and 310, but base materials of various materials such as metal, glass, resin, paper, and ceramics can be used.
Moreover, in Examples 1-9, although the 1st colored layer 120 grade | etc., Was provided in the base-material surface 110b etc. (this was used as the to-be-coated article 101), it is not necessary to necessarily provide the 1st colored layer 120 grade | etc.,. In Examples 1 to 9, since the ceramic building materials used as the base material were uneven in color and surface state (such as a rough feeling, a smooth feeling) such as the base material surface 110b, this was corrected to be uniform. For the purpose, the first colored layer 120 or the like is provided as a base. Therefore, if the color and surface state of the substrate surface 110b and the like are substantially uniform, the second colored layer 130 and the like are formed directly on the substrate surface 110b and the like without providing the first colored layer 120 and the like. (In this case, the substrate 110 or the like is an object to be coated).

  Moreover, in Examples 1-9, although the base material 110 etc. which has an unevenness | corrugation in the base material surface 110b etc. were used, you may make it use the base material whose base material surface is a plane. Specifically, first, a base color coating is applied to a flat substrate surface to make the surface (surface to be coated) an uneven shape (this becomes an object to be coated). Subsequently, you may make it form a colored layer with respect to the to-be-coated surface of this to-be-coated object using the method of this invention.

It is a figure which shows the base material 110 which comprises the coating material 100 of Example 1, (a) is a top view, (b) is the AA sectional drawing. It is sectional drawing of the to-be-coated article 101 which formed the 1st colored layer 120 in the base-material surface 110b of the base material 110. FIG. FIG. 3 is an explanatory diagram for explaining a colored layer forming step of Example 1. It is a figure which shows the gas injection apparatus 160 used for the colored layer formation process of Example 1, (a) is a top view, (b) is equivalent to the AA sectional drawing. It is sectional drawing which shows a state when the 2nd colored coating material is apply | coated to the surface 120b of the 1st colored layer. 1 is a cross-sectional view of a coated object 100 of Example 1. FIG. It is a figure which shows the base material 210 which comprises the coating material 200 of Example 8, (a) is a top view, (b) is the BB sectional drawing. It is sectional drawing of the to-be-coated object 201 which formed the 1st colored layer 220 in the base-material surface 210b of the base material 210. FIG. It is sectional drawing which shows a state when the 2nd colored coating material is apply | coated to the surface 220b of the 1st colored layer 220. FIG. It is sectional drawing of the coated object 200 of Example 8. FIG. It is a figure which shows the base material 310 which comprises the coating material 300 of Example 9, (a) is a top view, (b) is the CC sectional drawing. It is sectional drawing of the to-be-coated article 301 which formed the 1st colored layer 320 in the base-material surface 310b of the base material 310. FIG. It is sectional drawing which shows a state when the 2nd colored coating material is apply | coated to the surface 320b of the 1st colored layer 320. FIG. It is sectional drawing of the coated object 300 of Example 9. FIG. It is a figure explaining the colored layer formation process concerning another form, and is the schematic diagram seen from the top which shows eight types of variation of (a)-(h) about the arrangement | sequence of the nozzles 161-461.

100, 200, 300 Painted object 101, 201, 301 Object 110, 210, 310 Substrate 120b, 220b, 320b Surface to be painted 121, 122, 123, 221, 222, 223, 321, 322, 323 Convex part 121b, 122b, 123b, 221b, 222b, 223b, 321b, 322b, 323b First inclined surface 121c, 122c, 123c, 221c, 222c, 223c, 321c, 322c, 323c Second inclined surface 130, 230, 330 Colored layer 130b , 230b, 330b First colored portion 130c, 230c, 330c Second colored portion 160 Gas injection device 161, 261, 361, 461 Nozzle 161b Gas injection port

Claims (12)

A method for producing a coated object comprising a colored layer forming step of forming a colored layer on an object to be coated including a surface to be coated having irregularities,
The colored layer forming step includes
An application step of applying a colored paint to the surface to be coated;
Before the colored paint is cured, it is blown toward the colored paint and is moved by moving the colored paint within the surface to be coated by an air flow to make the thickness of the colored paint non-uniform , In a cross section obtained by cutting the object to be coated in a predetermined direction, a slanted surface that faces the one side with a vertex of the convex portion as a boundary among the inclined surfaces forming the unevenness of the surface to be coated of the object to be coated is a first slant. The thickness of the colored paint positioned on the first inclined surface when the inclined surface facing the surface and the other side is the second inclined surface is compared with the thickness of the colored paint positioned on the second inclined surface. , a blowing process to increase the thickness of Te have a,
In the air blowing process,
A gas jetting device that jets gas to form an airflow, jets gas in a direction that includes a component in the same direction as the direction in which the object is moved relative to the gas jetting device, and forms an airflow. Then, while applying an air flow to the colored paint applied to the surface to be coated, the object to be coated is moved relative to the gas jetting device, and a portion of the surface to be applied with the air current is relatively moved. Move
An angle θ formed by a gas injection direction of the gas injected from the gas injection device and a relative movement direction in which the object to be coated moves relative to the gas injection device satisfies a relationship of 30 ° <θ ≦ 70 °. <br/> A method for manufacturing a painted product. It is a manufacturing method of the paint according to claim 1 ,
The gas injection device includes a nozzle having a slit-shaped gas injection port,
In the blowing step,
The shortest distance between the gas injection port and the object to be coated is 2.0 to 4.0 cm,
The manufacturing method of the coating material which makes the internal pressure of the said nozzle higher 0.035-0.085 Mpa than external pressure, and injects gas from the said gas injection port. It is a manufacturing method of the paint according to claim 1 or 2 ,
The colored paint is a method for producing a coated product having a viscosity of 1.0 to 3.0 P (poise) measured using a B-type rotary viscometer at a rotation speed of 60 rpm. It is a manufacturing method of the paint according to any one of claims 1 to 3 ,
The colored paint is a method for producing a coated product having a transparency T of 20% or more. It is a manufacturing method of the paint according to claim 4 ,
The colored paint is a method for producing a coated product having the transparency T of 35% or more and 45% or less. It is a manufacturing method of the paint according to any one of claims 1 to 5 ,
The colored paint is
A method for producing a coated product comprising 0.5 to 3 wt% of a pigment and 1 to 9 wt% of a resin solid content. It is a manufacturing method of the paint according to any one of claims 1 to 6 ,
The colored paint is a colored paint in which the color difference ΔE between the surface to be coated and the reference colored layer obtained by applying and curing the colored paint on white art paper using an 8 mil applicator is 7 or more. Manufacturing method for painted objects. A method of manufacturing a coated article according to any one of claims 1 to 7,
The colored paint is a method for producing a coated product containing 3 to 10 wt% of a solid content of paint. It is a manufacturing method of the paint according to any one of claims 1 to 8 ,
The coated surface is a method for manufacturing a coated object in which convex portions having different protruding heights are irregularly distributed. A colored paint having a solid content adjusted to 3 to 10 wt% by diluting the colored composition for airflow movement is applied to the surface to be coated including the surface to be coated having irregularities, and the colored paint is cured. Before the colored paint is blown toward the colored paint, the colored paint is moved in the painted surface by an air flow , and the cross-section of the painted object is cut in a predetermined direction. Of the inclined surfaces forming the irregularities, the first inclined surface when the inclined surface facing one side with the apex of the convex portion as the boundary is the first inclined surface, and the inclined surface facing the other side is the second inclined surface. A method of forming a colored layer on the surface to be coated by increasing the thickness of the colored paint located above the thickness of the colored paint located on the second inclined surface, the method comprising: The above-mentioned object to be coated is made into the gas by a gas jetting device that jets to form an air flow. Injecting gas in a direction including the same component as the direction of movement relative to the spraying device to form an airflow, and applying the airflow to the colored paint applied to the surface to be coated, In the blowing process of moving the coated object relative to the gas injection device and relatively moving the portion of the surface to be coated that is exposed to the airflow, the gas injection direction of the gas injection device, An airflow moving coloring composition used in a method in which an angle θ formed by a relative movement direction in which the object to be coated moves relative to the gas injection device satisfies a relationship of 30 ° <θ ≦ 70 °. ,
When the colored composition for airflow movement is diluted to have a solid content of 6 wt%, the viscosity measured at a rotation speed of 60 rpm using a B-type rotary viscometer is 1.0 to 3.0 P ( A colored composition for airflow movement which is adjusted to be poise. It is a coloring composition for air current movement according to claim 10 ,
A coloring composition for airflow movement which is adjusted so that the transparency T is 35% or more and 45% or less when the coloring composition for airflow movement is diluted to have a solid content of 6 wt%. Apply the colored paint for airflow movement to the surface to be coated, including the surface to be coated having unevenness, and blow the airflow toward the colored paint for airflow movement before the colored paint for airflow movement is cured. In the cross section in which the colored paint for airflow movement is moved within the surface to be coated by an air current, and the object to be coated is cut in a predetermined direction, among the inclined surfaces forming the irregularities of the surface to be coated of the object to be coated When the inclined surface facing one side with the apex of the convex portion as the boundary is the first inclined surface, and the inclined surface facing the other side is the second inclined surface, the colored paint positioned on the first inclined surface A method for forming a colored layer on the surface to be coated by increasing the thickness as compared with the thickness of the colored paint located on the second inclined surface , wherein the gas forms a gas stream by jetting gas By means of an injection device, the object to be coated is made relatively to the gas injection device A gas jetting device configured to spray the gas in a direction including a component in the same direction as the moving direction to form an airflow, and apply the airflow to the colored paint applied to the surface to be coated while the gas jetting device In the air blowing step of moving the portion of the surface to be coated that is exposed to the airflow relatively, and the direction in which the gas is sprayed from the gas spray device, and the object to be coated is the gas An angle θ formed by a relative movement direction that moves relative to the injection device is a colored paint for airflow movement used in a method that satisfies a relationship of 30 ° <θ ≦ 70 ° ,
A colored paint for airflow movement having a viscosity of 1.0 to 3.0 P (poise) measured using a B-type rotary viscometer at a rotation speed of 60 rpm.

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