JPH0576832A - Film structure - Google Patents

Abstract

PURPOSE:To provide a film structure capable of obtaining the same depth as a multilayered coating layer with a reduced number of coatings. CONSTITUTION:A bright material-containing clear film layer 6 is applied to a color base film layer 5 and the bright material consists of a relatively large diameter bright material 7A and a relatively small diameter bright material 7B whose diameter ratio is set to 30-70% of that of the bright material 7A and scattered in the clear film layer in such an amount that the area occupying ratio obtained from a coating surface of an entire coating surface becomes 30% or less.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating film structure used as a top coating film for automobile bodies and the like.

[0002]

2. Description of the Related Art With the advancement of automobiles, there is a demand for a coating structure having a so-called depth with respect to the painting of the vehicle body.

It has been conventionally known that there are the following three factors as factors for improving the feeling of depth of a coating film.
That is, (1) There is a feeling of bottomlessness. (2) The color should be clear and transparent. (3) There is a sense of depth due to a three-dimensional glitter.

In order to realize these elements, various laminated coating film structures have been proposed in the past.
No. 12263, a coating film is formed by sequentially coating a transparent clear coating film layer, a colored clear coating film layer containing a dye and a transparent clear coating film layer on a colored coating film layer (base layer) containing a pigment. It gives a sense of depth and transparency. Further, for example, as disclosed in Japanese Patent Laid-Open No. 63-116784, a metallic coating layer containing aluminum flakes as a glittering material, a mica coating layer containing mica flakes as a glittering material, and a clear coating film. By coating the layers one by one, the luster and design are improved.

[0005]

By the way, in order to develop a feeling of depth of a coating film, a multi-layered structure in which a number of clear or dye-clear clear coating layers are coated on a dark color type top coating film layer. You need a coat.

However, it is not preferable to coat many coating layers from the viewpoint of workability and economical efficiency. Therefore, a coating film structure capable of developing a depth feeling similar to that of a multi-layer coating film can be obtained by using as few coats as possible. Was wanted.

In view of the above problems, it is an object of the present invention to provide a coating film structure capable of expressing a sense of depth with a small number of coats.

[0008]

A coating film structure according to the present invention comprises a colored base coating film layer and a clear coating film layer containing a glittering material, which is coated on the colored base coating film layer, The luster color material is composed of a relatively large luster color material and a relatively small luster color material having a diameter ratio within the range of 30 to 70% with respect to the relatively large luster color material. The area occupancy is 30% or less, and the areas are scattered.

[0009]

The coating structure according to the present invention has a relatively large glitter material and a diameter ratio of 30 relative to the relatively large glitter material in the clear coating layer coated on the colored base coating layer. Since the relatively small glittering material in the range of up to 70% is scattered, the relatively large glittering material appears to be present at a position close to the surface of the coating film, and the relatively small glittering material is the coating film. Since they appear to be present at a position far from the surface of the luster, even though these luster pigments are scattered in the same clear coating layer, the luster pigments have an interval in the thickness direction of the coating film. It will appear as if they were scattered in the two clear coating layers.

Therefore, it is possible to give the coating film a depth feeling similar to that of a multi-layer coat with a small number of coats.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view schematically showing an embodiment of a coating film structure according to the present invention. 1 is a steel plate, 2 is an electrodeposition coating layer, 3
Is an intermediate coating film layer, and 4 is a top coating film layer. The topcoat coating film layer 4 contains a glittering material in which the lowermost colored base coating film layer 5 coated on the intermediate coating film layer 3 and a relatively large glittering material 7A and a relatively small glittering material 7B are mixed. It is composed of a clear coating film layer 6 and an uppermost transparent clear coating film layer 8. The bright material-containing clear coating layer 6 may be colored with a dye having the same color as the colored base coating layer 5.

The glittering materials 7A and 7B are made of white mica flakes. For glitter materials such as white mica flakes, the thickness is 0.5 to 0.8 μm and the diameter is 5 to 50 μm.
Although a wide range of items are mixed, in the present embodiment,
A relatively large-diameter bright material 7A having a diameter of 45 to 50 μm
And a relatively small-diameter glittering material 7B having a diameter of 20 to 30 μm, which are screened by two types, are mixed in substantially the same number, and a minute amount thereof is scattered in the clear coating layer 6.

In FIG. 2, the diameter ratio (%) and the mixing ratio (number ratio) of the relatively small-diameter glittering material 7A to the relatively large-diameter glittering material 7A give the visual effect of three-dimensional feeling (depth feeling). It is a graph showing the influence. As is clear from FIG. 2, the diameter ratio of both glittering materials 7A and 7B is 40 to 60%.
And the ratio of the number of the two bright materials 7A and 7B is 5: 5.
The best results were obtained when (the same number), but when the number ratio was within the range of 7: 3 or 3: 7, both luster materials 7
It was confirmed that the effect was obtained when the diameter ratio of A and 7B was in the range of 30 to 70%.

In this case, the smaller the amount of the glittering material 7A, 7B contained in the clear coating layer 6 is, the more effective it is. Specifically, as shown in FIG. The area occupancy of the glittering materials 7A and 7B when viewed from the surface of the coating film is 0.1 to 10.
The effect is recognized within the range of 30%, and particularly within the range of 5 to 20%. When viewed as a weight ratio (wt%) to the resin, it is on the order of 10 ^-2 . It is preferable that the glittering materials 7A and 7B are scattered so that they do not overlap each other when viewed from the surface of the coating film.

Further, as the glittering materials 7A and 7B, those having different reflectances are used, and the glittering material having a higher reflectance (for example, aluminum flakes) is used as the glittering material 7A having a large diameter.
By using the glittering material having a lower reflectance (for example, white mica flake) as the glittering material 7B having a small diameter, the effect is increased. And both luster materials 7A and 7B in that case
It was confirmed by an experiment that it is preferable to set the reflectance ratio of 1 to 100: 10 to 50.

Next, an example of the method for forming a coating film structure according to the present invention will be described with reference to FIG.

First, an undercoat paint made of epoxy resin (OTO E1005 manufactured by Nippon Paint Co., Ltd.) is electrodeposited on the steel plate 1 and then baked at 165 ° C. for 30 minutes to form an electrodeposition coating film layer 2, Next, an intermediate coating material (OTOTO 830 manufactured by Nippon Paint Co., Ltd.) made of polyester melamine resin was applied onto the electrodeposition coating layer 2 by spraying,
An intermediate coating film layer 3 was formed by baking at 140 ° C. for 30 minutes.

Next, a base coating consisting of polyester melamine resin (OTO 640 manufactured by Nippon Paint Co., Ltd.) is applied onto the intermediate coating film layer 3 and baked at 140 ° C. for 30 minutes to prepare the top coating film layer 4. Underlying colored base coating layer 5
Formed.

Next, in a clear paint (OTO 520 manufactured by Nippon Paint Co., Ltd.) made of acrylic melamine resin,
White mica flakes having a diameter of 45 to 30 μm as the large-diameter glittering material 7A, and 2 as the small-diameter glittering material 7B.
A coating material in which white mica flakes having a diameter of 0 to 30 μm are mixed so that the numbers of both are substantially equal and the total amount of both is 0.038 wt%,
A clear coating composed of acrylic melamine resin (OTO 561 manufactured by Nippon Paint Co., Ltd.) was applied wet-on-wet and baked at 140 ° C. for 30 minutes to obtain a clear coating layer 6 and a clear coating layer 8 containing a glittering material. Formed.

The coating film structure thus formed was visually observed from the surface, and it was evaluated that the coating film structure had a depth feeling similar to that of a multi-layer coat, although the number of courses was small. ..

[Brief description of drawings]

FIG. 1 is a schematic sectional view of an example of a coating film structure according to the present invention.

FIG. 2 is a graph showing the influence of the diameter ratio and the number ratio of the glittering material on the sense of depth of the coating film.

FIG. 3 is a graph showing the influence of the area occupancy of the glittering material on the sense of depth of the coating film.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel plate 2 Electrodeposition coating layer 3 Intermediate coating layer 4 Top coating layer 5 Colored base coating layer 6 Bright coating material containing clear coating layer 7A, 7B Bright coating material 8 Transparent clear coating layer

Claims (1)

[Claims] 1. A colored base coating film layer, and a clear coating film layer containing a brightening material, which is applied onto the colored base coating film layer, wherein the brightening material is a relatively large brightening material and With a relatively small glitter material having a diameter ratio in the range of 30 to 70% with respect to a relatively large glitter material, and having an amount such that the area occupancy of the coating surface with respect to the entire coating surface is 30% or less. A coating film structure characterized by being scattered in the clear coating film layer.