JP2827765B2 - Metallic coating film and method for forming the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metallic coating film capable of ensuring the uniformity of the coating film surface and displaying a high-quality design mark and a method of forming the same.

[0002]

2. Description of the Related Art Conventionally, characters, figures,
Design marks such as patterns are provided. In forming the design mark, for example, there are a resin mark method, a sealing method, a coating method, and a printing method. In the resin mark method, a design mark made of resin with a boss on the back side is formed. On the other hand, a mounting hole is formed in the object to be coated, and the boss of the design mark is inserted into the mounting hole of the object to be coated. Then, the design mark is fixed to the object to be coated.

[0003] The sealing method is a method in which an adhesive is applied to the back surface of a design mark, and the applied adhesive is adhered to an object to be coated. The application method is a method in which a paint for forming a design mark is applied to an object to be coated to form a desired design mark such as a figure. The printing method is a method of printing a paint for forming a design mark on an object to be coated.

Comparing the above-mentioned design mark forming methods,
The resin mark method has a three-dimensional effect due to the thickness of the design mark as compared with other methods, and is excellent in visibility and luxury.
Further, since the design mark formed by the sealing method, the coating method, and the printing method has a flat shape, the design mark is more flush than the resin mark method.

[0005]

However, each of the above methods has the following problems. That is, when the object to be coated is a steel plate, in the resin mark method, a boss provided on the resin mark interferes with a mounting hole of the steel plate to promote rusting of the steel plate. In the seal method, the design mark has a poor appearance and is easily peeled off. The coating method and the printing method do not have a high-grade feeling, are easily discolored and faded, and have poor durability. Also, it is difficult to construct on curved surfaces.

[0006] Conventionally, there has been a method of forming a metallic coating in which a glittering material such as an aluminum piece is mixed into a base coating material in order to improve the glittering property and the high-grade appearance of the coating.
However, there is no part with a design mark. The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a metallic coating film capable of displaying a high-quality design mark while ensuring the uniformity of the coating film surface, and a method of forming the same.

[0007]

According to the present invention, an intermediate coating, a base coating containing a glittering material, and a clear coating are sequentially applied to the surface of an object to be coated to form an intermediate coating, a base layer, and a clear layer. In the metallic coating film, the metallic coating film has a design mark such as a character, a figure or a pattern formed therein, and the design mark is formed on the surface of the intermediate coating layer by the length of the glittering material in the base coating. a concavo-convex pattern formed with multiple recesses having the same or greater width than that to be more becomes inclined oriented luminous material obliquely to the coated surface is inclined invaginated concave plant, also the In a general portion other than the uneven pattern, the metallic coating film is characterized in that the glittering material is planarly oriented substantially parallel to the coating film surface.

As a method of forming the metallic coating film, an intermediate coating, a base coating containing a glittering material, and a clear coating are sequentially applied to the surface of the object to be coated, so that the intermediate coating and the base layer are formed. Forming a metallic coating comprising a clear layer and forming a design mark such as a character, a figure or a pattern inside the metallic coating, wherein the intermediate coating is applied to a portion where the design mark is to be formed. On the surface of the layer, an uneven pattern having a number of recesses having a width equal to or greater than the length of the glitter is formed, and then the base paint containing the glitter is applied to the surface of the intermediate coating layer. painted, in general portion other than the concave-convex pattern is bright material is planar orientation substantially parallel to the coated surface, whereas in the design mark portion, the luminous material recessed inclined into the recess Inclined obliquely with respect to the coating film surface by
There is a method for forming a metallic coating film, which is characterized by forming an obliquely oriented state and then applying a clear paint.

What is most notable in the present invention is that a design mark is formed inside the metallic coating film, and the design mark is formed on the surface of the intermediate coating layer by a concavo-convex pattern and a concave portion formed on the surface of the coating film. The glittering material is formed by using a glittering material which is obliquely and obliquely oriented , and the glittering material is planarly aligned except for the above-mentioned uneven pattern. In the present invention, the uneven pattern is formed on the surface of the intermediate coating layer according to the shape of the design mark. The average width of the recesses in the concavo-convex pattern is equal to or greater than the average particle size of the glittering material.

The width of the recess is preferably 10 to 200 μm. When the thickness is less than 10 μm, the recess becomes smaller than the glittering material, the glittering material does not enter the recess, and there is a possibility that the design mark is not formed. On the other hand, if the thickness exceeds 200 μm, there is a possibility that the glittering material that has intruded into the recess will be planarly oriented substantially parallel to the coating film surface. Therefore, on top of the bright material
The number of the inclined orientation portions is reduced, and the design mark may lack sharpness.

The pitch of the recess is set to 10
It is preferably not less than the size obtained by adding μm and not more than 400 μm. If the width is smaller than the width obtained by adding 10 μm to the width of the concave portion, there is a possibility that the convex portion sandwiched between adjacent concave portions may be broken due to insufficient strength. If the thickness exceeds 400 μm, the occupied area of the concave portion in the concavo-convex pattern decreases. For this reason, the area of the inclined orientation portion of the glittering material is reduced, and the design mark may lack sharpness.

Preferably, the depth of the recess is not less than 5 μm and does not exceed the thickness of the intermediate coating layer. 5 μm
If the value is less than the above range, it is difficult to incline the glittering material into the recess and to perform the inclined orientation , and there is a possibility that the sharpness of the design mark may be lacking. The depth of the recess greatly contributes to the sharpness of the design mark, but if it is too deep, the recess may remain partially concave after forming the base layer and the clear layer. If you do not want to change the depth of the recess in order to ensure the clarity of the design mark, for example, if the clear layer is partially polished and the clear paint is applied again, the effect of the recess may be eliminated. it can. Examples of the shape of the recess include a U-shaped groove, a V-shaped groove, and a square groove.

On the surface of the intermediate coating layer, an uneven pattern having a large number of recesses formed in a portion where a design mark is formed is formed. The undercoat layer may or may not be under the intermediate coat layer. In the intermediate coating layer, a portion where the above-mentioned uneven pattern is not formed, that is, a portion other than the design mark forming portion is a general portion. The surface of the general part is the same as before.
It is flat. The brilliant material is mainly in a flat shape such as a scale, and has an average particle diameter of 10 to 50 μm.
Examples of the glittering material include aluminum and mica.

The brilliant material on the surface of the intermediate coating layer other than the recesses is fixed in the base layer in a state of being planarly oriented in a plane direction substantially parallel to the coating film surface. Meanwhile, glitter material which is fitted into the recess, the planar direction, that the coated surface to
It is fixed in the base layer in a state where it is tilted obliquely . As described above, as a method of performing the tilt orientation , a base paint containing a glittering material is applied to the intermediate coating layer provided with the recess. Normally, a clear paint is further applied and then placed in a drying oven and cured and dried.

The base layer preferably has a thickness of 15 to 25 μm. If it is less than 15 μm, there is a problem in coating film durability. If it exceeds 25 μm, the paint is embedded in the recess. Therefore, the state becomes the same as the case where the depth of the recess is shallow, and there is a possibility that the sharpness of the design mark may be lacking. Further, the sharpness of the design mark can be variously changed by changing the type of the glitter material and the shape of the recess.

In forming the recess, there are a laser method, a scratch method, a photoresist method and the like. The laser method uses an infrared laser such as a YAG laser or a CO ₂ laser, or an excimer laser that is an ultraviolet ray, and irradiates the surface of the intermediate coating layer with a laser to partially burn off the intermediate coating layer. It is a method of forming a place. The scratching method is a method in which a recess is formed by mechanical means such as scratching the surface of the intermediate coating layer with a sharp-pointed needle or the like.

In the photoresist method, for example, a photocurable coating film is applied to the surface of an object having conductivity, and a pattern film is mounted thereon. Then, light is irradiated from above the pattern film to expose and cure the photocurable coating film under the portion where the pattern is not formed. Next, the pattern film is removed, and the hardened portion of the photocurable coating film is removed to leave a hardened portion. Next, an electrodeposition film is formed on the object to be coated which has been surfaced by removing the photocurable coating film. Thereafter, all the photocurable coating films are removed. As a result, a partial recess is formed on the object to be coated.

[0018]

According to the present invention, a concave / convex pattern is formed in a design mark forming portion, and the glittering material in the base layer is obliquely orientated with respect to the coating film surface in the concave portion. On the other hand, in a general portion other than the design mark forming portion, the glittering material is planarly oriented.

Therefore, when the metallic coating film of the present invention is irradiated with light, the glittering material shows different light reflection characteristics between the concavo-convex pattern in which the recesses are arranged and the general portion other than the concavo-convex pattern. . That is, in the concavo-convex pattern, the diffuse reflection component is small due to the oblique orientation of the glittering material that has entered the recess. On the other hand, in the general portion, since all the glittering materials are oriented in the plane direction, the diffuse reflection component is larger than that of the uneven pattern (see FIG. 7).

Therefore, by changing the viewing direction, the density of the metallic color of the metallic coating film changes. And
When viewed from one direction, the difference between the concavo-convex pattern and the general part cannot be distinguished, but when viewed from another direction, the concavo-convex pattern looks dark or thin and appears to float. The concavo-convex pattern thus exposed forms a design mark.

As described above, in the present invention, the design mark is not formed on the surface of the coating film as in the prior art, but is formed inside the coating film. For this reason, the surface of the metallic coating has a uniform surface. Therefore, it is possible to form the above-mentioned design mark while securing the uniformity in the metallic coating film. In addition, as for the design mark, the shade of the metallic coating film changes depending on the viewing angle as described above, so that a design mark with features can be formed.

Further, since the design mark is formed on the metallic coating film, the design mark has a high-class metallic color. Further, since the design mark is formed inside the metallic coating film, there is no possibility that the design mark is damaged. Further, according to the method for forming a metallic coating film, a metallic coating film having an excellent design mark as described above can be formed. INDUSTRIAL APPLICABILITY As described above, according to the present invention, it is possible to provide a metallic coating film capable of displaying a high-quality design mark while ensuring the uniformity of a painted surface, and a method for forming the same.

[0023]

Embodiment 1 An embodiment according to the present invention will be described with reference to FIGS. This example is a metallic coating film 90 for displaying a design mark and a method for forming the same. Metallic coating 9
0 is an object 9 made of a steel plate of a vehicle body, as shown in FIG.
Formed on

The metallic coating film 90 comprises an undercoat layer 8, an intermediate coating layer 7, a base layer 6, and a clear layer 5, which are an undercoat coating, an intermediate coating, a base coating containing a brilliant material, and a clear coating. It is formed by sequentially applying on the article 9 to be coated. The metallic coating film 90 has a concavo-convex pattern 71 at a design mark forming portion, and the glitter material 1 is obliquely orientated with respect to the coating film surface in the recess 70.
On the other hand, in the general portion 79, the glitter material 1 is planarly oriented.

Hereinafter, a method for forming a metallic coating film will be described in detail. First, an undercoat is applied on the object 9 to form an undercoat layer 8. Next, an intermediate coating material is applied on the undercoat layer 8 to form the intermediate coating layer 7, and an uneven pattern 71 is formed on the surface thereof. The thickness of the intermediate coating layer 7 is 10
５０50 μm.

The concavo-convex pattern 71 has the shape of a design mark, and a large number of recesses 70 having a width equal to or greater than the length of the glitter material 1 are regularly arranged. The portion other than the concavo-convex pattern 71 in the intermediate coating layer 7 is a flat general portion 79. The average width of the recess 70 is equal to or greater than the average particle diameter of the glittering material 1, and is 75 μm. Also,
The depth of the recess 70 is 10 μm or more. The pitch of the recess 70 is 150 μm. The recess 70 is U-shaped.

In forming the recess 70, a scratch method is used. The scratch method is a method in which a recess is formed by mechanical means such as scratching with a needle having a sharp tip. A conical diamond needle having a radius of 5 μm and an inclination angle of 60 ° is used as the needle.

Next, as shown in FIG.
The base layer 6 including the glittering material 1 is applied on the substrate. At this time, on the general portion 79 in the intermediate coating layer 7, the glitter material 1
Is applied so that the orientation of the film becomes a planar orientation. Also, recess 7
The luminous material 1 above the recesses 0 inclines into the recesses 70 and the recesses 7
The orientation state is different from that of the glittering material 1 other than 0, that is,
Paint so as to be obliquely oriented .

As described above, the inclined orientation in the recess 70 is formed by applying a normal base paint. That is, when a method such as spray coating is performed as usual, in the general portion, the glitter material 1 is planarly oriented along the coating direction. During this coating, glitter material 1 is recessed inclined in the recess 70 in the uneven pattern 71, the inclination
Produces orientation .

The luminous material 1 has a flat shape such as a scale, and has an average particle diameter of 10 to 50 μm and an average particle thickness of several μm. As the glitter material 1, aluminum is used. The base layer 6 has a thickness of 15 μm. Next, a clear paint is applied on the base layer 6 to form the clear layer 5.
To form At this time, the clear paint is applied while the base layer 6 is in a wet state. Thus, the metallic coating film 90 is formed.

Next, the operation and effect of this embodiment will be described.
In the metallic coating 90 obtained in this example, as shown in FIG. 1, the glittering material 1 in the base layer 6 is recessed into the recess 70 formed on the surface of the intermediate coating layer 7, and In contrast, they are oriented in an inclined state . On the other hand, on the flat surface of the general portion 79 of the intermediate coating layer 7, the glittering material 1 is oriented in a plane direction. Therefore, the glittering material 1 in the recess 70 is
It has a tilted orientation different from that of the brilliant material 1 other than the above .

Therefore, when the metallic coating 90 is irradiated with light, the glittering material 1 shows different light reflection characteristics between the concave and convex pattern 71 in which the concave portions 70 are arranged and the general portion 79 other than the concave and convex pattern. General part 7 other than the uneven pattern 71
In FIG. 9, since the glittering material 1 is oriented in the plane direction, the diffuse reflection component is larger than that of the uneven pattern 71 (see FIG. 7).

Therefore, by changing the viewing direction, the metallic color of the metallic coating 90 changes. When viewed from a certain direction, the uneven pattern 71 and the general portion 7
Although the difference of 9 cannot be identified, the projections and depressions pattern 71 may appear dark or thin and appear to rise when viewed from another direction. The concavo-convex pattern 71 thus exposed forms a design mark.

As described above, according to the present embodiment, the design mark is not formed on the surface of the coating film as in the prior art, but is formed inside the coating film. For this reason, the surface of the metallic coating has a uniform surface. Therefore, the design mark can be formed while ensuring the uniformity in the metallic coating film 90. Also, the color of the metallic coating film 90 changes depending on the viewing angle as described above,
A characteristic design mark can be formed.

The design mark is a metallic coating 90
, It has a metallic-colored luxury.
Further, since the design mark is formed inside the metallic coating film 90, there is no possibility that the design mark is damaged. Further, according to the method for forming a metallic coating film, it is possible to form the metallic coating film 90 having the excellent design mark as described above.

Embodiment 2 In this embodiment, as shown in FIG.
An intermediate coating layer 701 made of an electrodeposition film is formed. The article 9 is a conductive steel plate. The intermediate coating layer 701 includes a concavo-convex pattern 71 having the shape of a design mark and a general portion other than the concavo-convex pattern 71. Above pattern 71
Is formed with a number of recesses 70 having a square groove shape.

In the present embodiment, a photoresist method is used to form the concavo-convex pattern 71. The method of forming the same will be described below with reference to FIGS. First, as shown in FIG. 3, the photocurable coating film 2 is applied to the surface of the article 9 to be coated, and the pattern film 3 is placed thereon. The photocurable coating film 2 is a positive photosensitive film. On the pattern film 3, a mask pattern 30 having the same shape as the concave portion to be formed is formed. Then, light is irradiated from above the pattern film 3 to expose and cure the photocurable coating film 2 under the portion where the mask pattern 30 is not formed.

Next, as shown in FIG. 4, the pattern film is removed, the red-cured portion of the photocurable coating film is removed, and the cured portion 21 is left. Next, as shown in FIG. 5, the object 9 is energized to form an intermediate coating layer 701 in the recess between the cured portions 21.

Thereafter, as shown in FIG. 6, all the hardened portions remaining on the object 9 are removed. Thus, an intermediate coating layer 701 having recesses 70 arranged regularly is provided on the article 9 to be coated. Others are the same as the first embodiment. In this embodiment, the same effect as in the first embodiment can be obtained.

Embodiment 3 In this embodiment, a laser method is used to form a concave portion in an uneven pattern. The above laser method
In this method, a concave portion is formed by irradiating the surface of the intermediate coating layer with an ultraviolet laser to partially burn off the intermediate layer. By the above laser method, regular recesses having a recess pitch of 150 μm and a recess diameter of 75 μm were formed. Others are the same as the first embodiment. In this embodiment, the same effect as in the first embodiment can be obtained.

Embodiment 4 In this embodiment, as shown in FIGS. 7 and 8, with respect to the metallic coating film of Embodiment 3, the light reflection characteristics of the concave / convex pattern portion which is a design mark and the flat general portion are shown. Was measured. For measurement, use a digital gonio-gloss meter (UGV
-5K (manufactured by Suga Test Instruments Co., Ltd.)) was used. That is, FIG.
As shown in the figure, the angle of incidence 4 with respect to the surface of the metallic coating
1 was fixed at 45 °, and the reflection intensity at various angles of the reflection angle 49 was measured. FIG. 7 shows the result.

As can be seen from FIG. 7, the regular reflection angle (45 °) is used for both the concavo-convex pattern (dotted line) and the general portion (solid line).
, The reflection intensity was the highest, and the specular reflection component did not have a significant difference in both. On the other hand, the reflection intensity of the diffuse reflection component was higher in the general portion than in the uneven pattern.

Here, the specular reflection component refers to a reflected light component at the same angle as the incident angle 41 and in a direction opposite to the incident angle 41 from the normal 40. For example, when the incident angle 41 is 45 °, the angle of the specular reflection component is 45 °. The diffuse reflection component is a reflected light component excluding a regular reflection angle component.

The following can be understood from the above results. That is,
When the concavo-convex pattern and the general portion are viewed from a certain direction, the reflected light components of both are similar. In this case, it is difficult to distinguish between the two. However, when viewed from another direction, the reflected light components of the two are different. In this case, the concavo-convex pattern looks darker than the general part, and when viewed from other angles, the concavo-convex pattern looks thin and appears to rise. The exposed concavo-convex pattern is a design mark.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part of a metallic coating film of Example 1.

FIG. 2 is a cross-sectional view of a metallic coating film of Example 1.

FIG. 3 is an explanatory view showing a method for forming a recess in a metallic coating film of Example 2.

FIG. 4 is an explanatory view following FIG. 3 showing a method for forming a recess.

FIG. 5 is an explanatory view following FIG. 4 showing a method for forming a recess;

FIG. 6 is an explanatory view following FIG. 5 showing a method for forming a recess.

FIG. 7 is an explanatory diagram (incident angle of 45 °) showing the light reflection characteristics of a metallic coating film in Example 4.

FIG. 8 is an explanatory diagram showing how to obtain the reflection characteristics of FIG. 7;

[Explanation of symbols]

1. . . Brilliant material, 2. . . 2. photocurable coating film; . . Pattern film, 4. . . Light, 5. . . Clear layer,
6. . . Base layer, 7, 701. . . Intermediate layer, 7
0. . . Recess, 71. . . Concavo-convex pattern, 79. . . General part, 8. . . Undercoat layer, 9. . . Object to be coated, 90. . .
Metallic coating,

Claims (2)

(57) [Claims] 1. A metallic coating film comprising an intermediate coat, a base layer and a clear layer formed by sequentially applying an intermediate coat, a base paint containing a glittering material, and a clear paint on the surface of an object to be coated. The metallic coating has a design mark such as a character, a figure, a pattern, etc. formed therein, and the design mark is formed on the surface of the intermediate coating layer at a length equal to or longer than the length of the glittering material in the base coating. a concavo-convex pattern formed with multiple recesses with even greater width, the coating film surface inclined invaginated concave plant
A metallic coating film comprising a glittering material that is obliquely oriented, and in a general portion other than the above-mentioned uneven pattern, the glittering material is planarly oriented substantially parallel to a coating film surface. 2. A metallic coating film comprising an intermediate coating layer, a base layer, and a clear layer is formed by sequentially applying an intermediate coating, a base coating containing a glittering material, and a clear coating on the surface of an object to be coated. And forming a design mark such as a character, a figure or a pattern inside the metallic coating film, wherein the surface of the intermediate coating layer at the portion where the design mark is to be formed has a length corresponding to the length of the glittering material. An uneven pattern having a number of recesses having the same or larger width is formed, and then the base paint containing a brilliant material is applied to the surface of the intermediate coating layer to form a general part other than the uneven pattern. bright material is planar orientation substantially parallel to the coated surface in, while in the design mark portion, inclined obliquely oriented with respect to the luminous material inclined invagination coated surface into the recess < br /> On purpose without, then metallic coating film method forming, which comprises coating a clear coating.