JPH06306313A - Fine particle for coating or printing and decorative laminate - Google Patents

Abstract

PURPOSE:To obtain the title particle with which a coated or printed surface having an almost constant, bright metallic tone when viewed at any angle can be obtained, by coating a base foil on both sides with a colored coating containing an improved pigment. CONSTITUTION:The particle a comprises a base foil 1 having a colored coating film 5 on each of both sides 3 and 4 excluding the edges 2, the film 5 containing a pigment 7 consisting of pigment flakes formed by crushing. The foil 1 is preferably an aluminum foil 6-60mum thick. The pigment 7 is preferably melamine cyanurate. The film 5 is preferably a baked synthetic thermoset resin film having high transparency. The foil 1 has been punched into a substantially rectangular shape in which the contour of the edges 2 has no acute angles and has at least one indentation 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to fine particles to be included in paints, printing inks, etc. when coating automobiles, building materials, etc. and various printing. Furthermore, the present invention relates to a decorative board for indoor wall materials.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 55-47062 discloses, as metal fine particles for metallic coating, the present inventor.
(1) Use an aluminum foil having a thickness of 6 to 60 μm as the base foil, (2) a highly transparent colored coating film on both flat surfaces of the base foil except the outer peripheral surface of 0.1 to 3.0 μm.
(3) The base foil is punched and cut into a substantially quadrilateral constant shape, and at that time, a notch is formed at one location on the outer peripheral surface of the base foil, specifically, a corner.
Is disclosed.

According to this, for example, when coating the body of an automobile, after coating with a metallic paint containing the above-mentioned metal fine particles instead of the usual aluminum fine particles consisting only of the bare metal surface,
When a clear coating film is formed on the surface, you can see the colored coating film on both flat surfaces of the metal particles through the clear coating film, and you can get a deluxe metallic feeling like seeing a bright twinkling star in the dark night sky. That is, as will be described later, since all the metal fine particles have substantially the same shape, some of them are not arranged in a random manner such as being in an upright state, and it is likely that the metal fine particles are reliably overlapped and settled through the notches. Have contributed. Further, even in difficult metallic coloring work, there is an advantage that it becomes very simple by simply selecting the size and amount of the metal fine particles and using the colored coating film of the metal fine particles as a color sample. Regarding the metallic coating method using such metal fine particles, there is another Japanese Patent Publication No. 57-42381, which is proposed by the present inventor.

Further, Japanese Utility Model Publication No. 63-7329 discloses a decorative board proposed by the present inventor. In this method, the surface of a transparent substrate made of synthetic resin or glass is formed into a convex mirror or a concave mirror, and the back surface of the transparent substrate is coated with the coating material containing the metal fine particles to form a coating film. As a result, when the transparent substrate is viewed from the surface side, the metal fine particles are seen through, and the color of the colored coating film on the metal fine particles has a basic color tone. Because the image is distorted, the image does not appear to be clear as a whole, but depending on the viewing angle, it can be transformed into an iridescent color due to the interference of light, which gives it a rich and luxurious feel.

[0005]

The problem is the pigment contained in the colored coating film on the fine metal particles. For example, a transparent pigment is melamine cyanurate, the raw material of which is basically available as a dry powder having a spherical shape of 2-3 μm. In this way, if the pigment remains spherical, even if it is evenly mixed in the colored coating film, an object coated or print-finished with a paint or ink containing the corresponding metal fine particles, for example, in an oblique direction, etc. When viewed from a different angle, the pigment itself does not reflect light in all azimuth directions, so a problem remains in the place where a dark part appears in part and the whole is not bright.

Therefore, an object of the present invention is to improve the pigment in the colored coating film formed on both flat surfaces of the base foil so that the painted surface or the printed surface is as constant as possible from any angle. It is to obtain fine particles for painting or printing that can make the metallic color tone bright. Another object of the present invention is to obtain a decorative plate which, when finished with a paint containing the fine particles, similarly has a certain metallic color tone and is brightly colored without being darkened when viewed from any angle. .

[0007]

As shown in FIGS. 1 and 2, the fine particles for coating or printing according to the present invention have a colored coating film 5 on both flat surfaces 3 and 4 of the base foil 1 excluding the outer peripheral surface 2. And the colored coating film 5 contains the pigment 7 obtained by crushing the raw material into flakes.

From the viewpoint of mass productivity and the like, an aluminum foil having a thickness of 6 to 60 μm is preferably used as the base foil 1, but copper, stainless steel, brass and a metal deposition film are formed on a transparent plastic film. It may be one. The aluminum foil in the present invention is a concept including a transparent plastic film formed by vapor deposition of an aluminum vapor deposition film. The pigment 7 is preferably elastic and transparent so as not to be crushed when crushed. A typical example is melamine cyanurate, and the amount of the pigment 7 mixed in the colored coating film 5 is 1/10% by weight. Is preferred.

The colored coating film 5 is a paint having good transparency and reflection brightness, and can be formed to have a thickness of 0.1 to 3.0 μm. Specifically, it is desired to use a thermosetting synthetic resin paint, for example, a baked paint film of an acrylic resin paint. The base foil 1 is stamped and formed into a substantially quadrilateral constant shape having no acute angle portion of 90 ° or more on the outer peripheral edge thereof, and a notch 6 is provided at least at one location on the outer peripheral surface 2. When the fine particles a settle in the paint or printing ink, the notch 6 is combined with the fact that the fine particles a do not have an acute angle of 90 ° or more, so that the notch 6 does not stand up and it is easy to fall down as much as possible. It is intended to be effective. The particle size of the base foil 1, that is, the size of one side is, for example, 25 μm.
It can be about m to 5 mm.

The fine particles a of the present invention can be produced by applying a coating material containing the pigment 7 on the front and back surfaces of a base foil material, and then punching and cutting the base foil material into a certain shape.
Alternatively, as shown in FIG. 5, the decorative board of the present invention is a transparent substrate 2.
The surface of No. 0 is a convex mirror or a concave mirror, and the coating film 22 containing the fine particles a is formed on the back surface of the transparent substrate 20.

[0011]

【Example】

(Example 1) A paint obtained by mixing 5% by weight of melamine cyanurate (pigment) in an acrylic resin was baked and applied on both smooth surfaces of the front and back of an aluminum foil spread to a thickness of 30 μm.
After forming a 1.0 μm colored coating film, it was precisely punched and cut by a die-cutting machine to form rectangular flat aluminum fine particles a shown in FIG.

That is, as shown in FIGS. 1 and 2, the aluminum fine particles a are made of an aluminum foil having a thickness of 30 μm as a base foil 1, and an outer peripheral edge 2 of the aluminum foil is left as a bare metal surface, and both flat sides of the base foil 1 are flattened. A 1.0 μm-thick colored coating film 5, 5 is formed on each of the surfaces 3, 4 and has a constant shape in which all are substantially the same rectangle at the time of punching and cutting, and the particle size on the long side is 1.0 mm. In addition, the round notch 6 is formed at one corner.

However, what should be noted here is the colored coating film 5
Melamine cyanurate as the pigment 7 contained therein. Melamine cyanurate is essentially 2.
It is obtained as a dry powder having a spherical shape of 0 to 3.0 μm, which is preliminarily crushed into a substantially circular flat shape having a thickness of about 1.0 μm and a diameter of about 6 μm by applying it to a roller. Was mixed into the paint forming the colored coating film 5.

Thus, as shown in FIG. 3, an undercoat coating film 11 of the same color as the colored coating film 5 of the aluminum fine particles a was formed by coating on the article 10 whose undercoat was adjusted. Next, a mixture of the above-mentioned aluminum fine particles a, which is composed of a polymer which is mostly 0.1% by weight of a solvent, is sprayed onto the undercoating film 11, and the sprayed film 12 is dried to undercoat. Coating film 11
Aluminum fine particles a were temporarily attached on top. Finally, as shown in FIG. 4, an ordinary clear coat having a solvent content of 50% by weight was applied to the surface several times as before to form a top coat film 13.

When the metallic coating film thus obtained was observed, it had a bright luster and glittered. This is different from the one in which the aluminum fine particles a were crushed into a conventional irregular shape, and all had the same shape, and 90
Since it does not have an acute angle of less than or equal to °, it does not project on the surface of the undercoat coating film 11 when the aluminum fine particles a settle down as the solvent of the spray film 12 evaporates during the previous temporary attachment step. Moreover, it settles to the same degree. Moreover,
Since the aluminum fine particles a are quadrangular flat bodies, unlike other things such as a hook shape, they do not entangle with each other, and since they have the notches 6 at one corner, the weight balance is lost when they settle. Easy to fall flat. These things synergistically cause the aluminum fine particles a in the spray film 12.
However, as shown in FIG.
As shown in (b), it is considered that the metallic coating film has a bright luster and a glittering star is seen in the dark night sky as a result of flattening in layers and being uniformly dispersed. Even when the angle was changed, there was no darkening and a bright metallic appearance as a whole appeared. This is because not only the aluminum fine particles a themselves are flat, but also the pigment 7 of the colored coating film 5 on the aluminum fine particles a is flattened, so that the pigment 7 also reflects light in all directions. is there.

(Embodiment 2) FIG. 5 exemplifies a decorative plate according to the present invention, in which a partially spherical convex portion 21 is densely formed over the entire surface of a transparent substrate 20 made of plastic, and It has a basic structure in which a coating film 22 of metallic paint containing the aluminum fine particles a is applied and formed as a reflection layer on the back surface. The protrusions 21 on the surface of the transparent substrate 20 each have a function of a convex mirror, and preferably have an irregular shape, and the protrusion height of each protrusion 21 is relatively large, 3 mm to 10 mm. Has a concave curved portion 21b at the protruding top.

When this decorative plate is laid on a wall surface in a room and is illuminated with light, the color of the colored coating film 5 of the amyl fine particles a has a basic color tone, and the surface of the transparent substrate 20 is closely packed. The image is distorted by the continuously formed convex portions 21, and the image is invisible as a whole, but has various changes, and the changes further change depending on the viewing angle. And the interference effect of light, that is, the phenomenon that light waves pile up with each other and strengthen each other or weaken each other, and in many cases, a subtle striped rainbow color partially appears. .

The transparent substrate may be a glass plate, in which case the back surface of the glass plate may be roughened to form the coating film 22.

[Brief description of drawings]

FIG. 1 is a perspective view of fine particles according to the present invention.

FIG. 2 is a cross-sectional view of fine particles according to the present invention.

FIG. 3 is a cross-sectional view illustrating the manner in which fine particles adhere to an undercoat coating film.

FIG. 4 is a cross-sectional view showing a final end face structure of a metallic coating film.

FIG. 5 is a partially longitudinal perspective view of a decorative plate according to the present invention.

[Explanation of symbols]

 a Fine aluminum particles 1 Base foil 2 Outer peripheral surface 3.4 Flat surface 5 Colored coating film 6 Notch 7 Pigment 20 Transparent substrate 22 Coating film

Claims (6)

[Claims] 1. A flat surface 3 excluding an outer peripheral surface 2 of a base foil 1.
4 has a colored coating film 5 formed thereon, and the colored coating film 5 contains a pigment 7 obtained by crushing the raw material into a scaly form. Fine particles for coating or printing. 2. The fine particles for coating or printing according to claim 1, wherein the base foil 1 is an aluminum foil having a thickness of 6 to 60 μm. 3. The fine particles for coating or printing according to claim 1, wherein the pigment 7 is melamine cyanurate. 4. The fine particles for coating or printing according to claim 1, wherein the colored coating film 5 is a baked coating film of a highly transparent thermosetting synthetic resin coating material. 5. The base foil 1 is stamped and formed into a substantially quadrilateral constant shape having no acute angle portion of 90 ° or more on the outer peripheral edge thereof, and is formed on at least one location on the outer peripheral surface 2 of the base foil 1. The fine particles for coating or printing according to claim 1, wherein a notch 6 is provided. 6. A decorative plate in which the surface of the transparent substrate 20 is formed into a convex mirror or a concave mirror, and the coating film 22 containing the fine particles a according to claim 1 is formed on the back surface of the transparent substrate 20.