JP3465320B2 - Coating structure - Google Patents

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, and more particularly to improvement of a coating film containing a retroreflective material, which has a transparent feeling, shine and a deep feeling like a jewel. .

[0002]

2. Description of the Related Art Conventionally, a retroreflective coating film using retroreflective light is well known and is used, for example, for traffic signs and safety signs. This retroreflective coating film is shown in FIG.
As shown in FIG. 2, a light reflection layer 2 formed on a predetermined substrate 1
, And retroreflective materials (for example, glass beads) 4, 4 ... which are uniformly and densely arranged on the upper layer side of the light reflection layer 2 with the binder layer 3 interposed therebetween, and the retroreflective materials 4, 4 ,. A structure having a clear layer 5 provided on the upper layer side is well known (see, for example, JP-A-63-229176).

[0003]

The retroreflective coating film having the above-mentioned structure has a high brightness (in other words, a jewel-like transparency and brilliance due to the presence of retroreflected light retroreflected in the retroreflective material. , A feeling of depth) is exhibited, and it can be considered to use this as a coating film for automobile outer panels.

By the way, in the retroreflective coating film, there is a range in which the hue appears to change when viewed from a certain angle. For example, as shown in FIG. 3, in the case of incident light I ₀ of −45 °,
A hue change occurs in the retroreflected light I in the range of −10 ° to + 10 °. This is caused by spectroscopy inside the retroreflective material (for example, glass beads), and the degree of hue change changes depending on where in the layer forming the coating film is colored. That is, in the above-mentioned retroreflective coating film, the retroreflective material 4, 4
.. If the clear layer 5 on the upper layer side (including the retroreflective material) is colored, light of the colored color is absorbed before reaching the retroreflective materials 4, 4 ... Even if the color is colored, the change in hue becomes small, and the change is limited to the colored range.

Therefore, as shown in FIG. 1, a color clear layer 6 is interposed between the retroreflective materials 4, 4 ... And the light reflection layer 2, and the light is passed through the color clear layer 6 to cause a retroreflection. It is possible to cause a large hue change (rainbow phenomenon) in the reflected light, but the glass beads used as a retroreflective material do not become colorless and transparent due to various factors in the manufacturing process, and have a yellowish color. Therefore, depending on the hue of the color clear layer 6, it may be difficult to cause the rainbow phenomenon due to absorption in the glass beads.

The invention of the present application has been made in view of the above-mentioned points, and by associating the hue of the color clear layer and the hue of the retroreflective material, which are interposed between the retroreflective material and the light reflective layer, with each other, The purpose is to make it possible to cause a rainbow phenomenon due to retroreflected light with a simple layer structure.

[0007]

According to the invention of claim 1, as a means for solving the above-mentioned problems, a light reflecting layer formed on a predetermined substrate and provided on the upper layer side of the light reflecting layer,
In a coating film structure comprising a transparent clear layer having a retroreflective material and a color clear layer disposed between the both layers so as not to cover the retroreflective material, the hue of the color clear layer and the retroreflective material It is assumed that their own hues are complementary to each other.

According to a second aspect of the present invention, as means for solving the above-mentioned problems, in the coating film structure according to the first aspect, the hue of the color clear layer is set in a range of 10P to 10BG in a 100-division Munsell hue ring. There is.

[0009]

According to the invention of claim 1 or 2, the following actions can be obtained by the above means.

That is, the color possessed by the retroreflective material (for example,
10YR to 10GY in the 100-division Munsell color wheel
(A yellowish color which is a range of), a specific hue change that occurs in retroreflective light, and a color that is complementary to the color of the retroreflective material due to light that has passed through the color clear layer (for example, 100
In the split Munsell hue circle, a hue change of 10 P to 10 BG) occurs together.

[0011]

According to the invention of claim 1 or 2, a light reflecting layer formed on a predetermined substrate, and a transparent clear layer provided on the upper layer side of the light reflecting layer and having a retroreflective material, In a coating film structure comprising a color clear layer disposed between the both layers so as not to cover the retroreflective material,
It is assumed that the hue of the color clear layer and the hue of the retroreflective material are in a complementary color relationship with each other (for example, the hue of the retroreflective material is 10Y in the 100-division Munsell hue ring).
In the range of R to 10 GY, the hue of the color clear layer is 10 P to 10 BG in the 100-division Munsell hue ring.
)), The characteristic hue change that occurs in retroreflective light due to the color that the retroreflective material possesses, and the hue change of the color that is complementary to the color of the retroreflective material due to the light that has passed through the color clear layer. Since it is generated, there is an excellent effect that a hue change of seven colors (that is, a rainbow phenomenon) can be expressed by an extremely simple layer structure.

[0012]

EXAMPLES The present invention will be described in detail below based on examples.

The coating film structure of this embodiment has the structure shown in FIG.
The light-reflecting layer 2 is formed on a predetermined substrate 1, the color clear layer 6 is formed on the upper side of the light-reflecting layer 2, and the color clear layer 6 is formed. And a transparent clear layer 5 having the retroreflective materials 4, 4, ..., which are uniformly and densely arranged on the binder layer 3.

In this embodiment, an automobile outer plate is used as the substrate 1, and a coating film (for example, an intermediate coating film) obtained by a conventionally known method is used as the light reflecting layer 2. . Further, glass beads are used as the retroreflective material 4, and the transparent clear layer 5 is dense (for example, 290 to 3).
10 pieces / mm ² ). Glass beads 4
Is in the range of 10YR to 10GY (that is, a yellowish color) in the 100-division Munsell hue ring (see FIG. 4) due to various factors in the manufacturing process. Further, the color clear layer 6 is formed so as not to cover the glass beads 4, 4, ... In the transparent clear layer 5.

Therefore, in the present embodiment, the hue of the color clear layer 6 is a hue complementary to the hue of the glass beads 4 (that is, the hue in the range of 10P to 10BG in the 100-division Munsell hue ring). To be done.

Specifically, the light reflecting layer 2 is the substrate 1
It is obtained by baking polyester melamine paint (manufactured by Nippon Paint: OTO-825) on 140 ° C. × 30 min conditions (on which an electrodeposition coating film obtained by electrodeposition baking an epoxy resin-based paint is formed). The film thickness is 40 μm.

The color clear layer 6 is obtained by adding a blue pigment (silver W5, black, new extract trouble, shanin blue SG, violet P) to an acrylic melamine paint (manufactured by Nippon Paint: OTO-520 Lovenable Metallic). It is obtained by baking under the conditions of 140 × 30 min, and the film thickness is set to 15 μm.

The binder layer 3 is made of acrylic urethane paint (R-256 manufactured by Nippon Bee Chemical) at 90 ° C. × 30 m.
It is obtained by baking under the in condition, and the film thickness is 2-3.
It is assumed to be μm.

The glass beads 4 are made of union and have a refractive index of 2.2 and a diameter of 40 to 60 μm.

The transparent clear layer 5 is made of acrylic melamine paint (manufactured by Nippon Paint: OTO-563) at 140 ° C. × 3.
It is obtained by baking under the condition of 0 min, and the film thickness is 80 μm.

With the coating film structure having the above-mentioned constitution, the following effects can be obtained.

The color possessed by the glass beads 4, 4, ... (ie, 10YR- 10 in a 100-division Munsell color wheel)
A specific hue change caused by retroreflected light due to the GY range) and a color complementary to the color of the glass beads 4 due to the light transmitted through the color clear layer 6 (that is, 10P to 10BG in the 100-division Munsell hue circle). (Colors in the range) and the hue change of 7 colors.
(Ie, rainbow phenomenon) is developed.

Regarding the retroreflective coating film of this example, -45 was used.
The retro-reflected light I (see FIG. 3) in the range of −10 ° to + 10 ° with respect to the incident light I ₀ of ₀ ° was analyzed by the 100-division Munsell color wheel, and as shown in FIG.
An overall hue change in the 00 segment Munsell hue ring was obtained. From this, it was confirmed that the above-mentioned effects can be obtained.

By the way, Comparative Examples 1 to 3 with different coating film structures
Then, the same analysis was performed, and the results shown in FIGS. 6 to 8 were obtained.

In the case of Comparative Example 1, no pigment was added to the acrylic melamine paint constituting the color clear layer 6, and in Comparative Example 2, a red pigment (that is, glass) was added to the acrylic melamine paint constituting the color clear layer 6. In the case of Comparative Example 3, a blue dye was added to the acrylic melamine paint that forms the transparent clear layer 5 without adding a pigment to the acrylic melamine paint that forms the color clear layer. (Made by CIBA-GEGY: OR
(ASOL BLUE) is added.

In the case of Comparative Example 1, as shown in FIG. 6, only the hue change in the range corresponding to the color of the glass beads 4 is obtained, and the rainbow phenomenon does not appear. In the case of Comparative Example 2, as shown in FIG. 7, only the hue change in the range close to the color of the color clear layer 6 is obtained, and the rainbow phenomenon does not appear. In the case of Comparative Example 3,
As shown in FIG. 8, only the hue change in the range corresponding to the color of the transparent clear layer 5 is obtained, and the rainbow phenomenon does not appear.

From the above results, the operational effects of the present invention can be clearly confirmed.

In the above description, glass beads are used as the retroreflective material, but other retroreflective materials having retroreflecting ability may be used.

[Brief description of drawings]

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

FIG. 2 is a cross-sectional view showing a conventionally known coating film structure.

FIG. 3 is an explanatory diagram showing a relationship between incident light and retroreflective light in a retroreflective coating film.

FIG. 4 is a 100-division Munsell hue circle.

FIG. 5 is an analysis diagram showing a hue change of retroreflected light in a coating film structure according to an example of the present invention in a 100-division Munsell hue ring.

FIG. 6 is an analysis diagram showing a hue change of retroreflected light in a coating film structure of Comparative Example 1 in a 100-division Munsell hue circle.

7 is an analysis diagram showing a hue change of retroreflected light in a coating film structure of Comparative Example 2 in a 100-division Munsell hue circle. FIG.

FIG. 8 is an analysis diagram showing a hue change of retroreflected light in a coating film structure of Comparative Example 3 in a 100-division Munsell hue circle.

[Explanation of symbols]

1 is a substrate, 2 is a light reflection layer, 3 is a binder layer, 4 is a retroreflective material (glass beads), 5 is a transparent clear layer, and 6 is a color clear layer.

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B32B 1/00-35/00 G02B 5/00-5/136 B05D 1/00-7/26 G09F 13 / 00-13/46 G09F 1/00-5/04

Claims (2)

(57) [Claims] 1. A light reflection layer formed on a predetermined substrate,
A coating film structure is provided, which is provided on the upper layer side of the light reflection layer and has a transparent clear layer having a retroreflective material, and a color clear layer disposed between the both layers so as not to cover the retroreflective material. And the hue of the color clear layer and the hue of the retroreflective material itself are in a complementary color relationship with each other. 2. The coating film structure according to claim 1, wherein the hue of the color clear layer is in the range of 10P to 10BG in a 100-division Munsell hue ring.