JP2592606B2 - Matte decoration - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a matte or pear-like decorative body which improves a decorative effect, has good adhesion, and hardly causes peeling of a coating film.

(Problems with conventional technology) Conventionally, in a decorative article such as a writing instrument shaft, a cosmetic container, a watch article, etc., a method such as surface treatment of an article has been used as a means for improving the decorative effect. This greatly affects the product value, and the consumer's willingness to purchase is greatly affected.

In recent years, products with matte or satin finish on the surface of articles have been favored by buyers, but satisfactory methods have been obtained despite various proposals for these methods of expression. There is no present.

That is, as a conventional method for expressing a matte tone or a matte tone, a paint containing a resin powder, a polymer powder, or an inorganic powder such as alumina, titania, silica, and talc is applied to a substrate. However, among the above-mentioned powders, silica powder, in particular, tends to have an effect on the surface hardness of the coating film due to its properties, and in order to increase the surface hardness of the coating film, the primary particles Since a high binding property is used, if the paint is directly applied to the base material, the concentration of the powder increases near the base material, and the adhesion area between the base material and the resin contained in the paint decreases. A coating film having high adhesion cannot be obtained.

Also, when a primer such as primer, clear, or enamel is applied to the substrate, the adhesion is improved, but the adhesion between the underlayer and the coating film is improved, so that the undercoat is completely cured. In this case, the paint is applied in a state where it is not present, and at this time, a concentration gradient of the powder occurs, or the weight of the powder itself is applied, so that the powder is contained in the upper coating film Because the powder moves to the lower layer, which is the underlying layer, the amount of powder contained in the coating decreases, and a matte or pear-like coating with a high decorative effect cannot be obtained. is there.

(Means for Solving the Problems) The present invention has been made in view of the above problems, and its gist is that a coating film is formed on a base material by using a paint containing at least a pigment and a powder made of silica. A decorative body provided with a layer, wherein the coating layer is formed into a plurality of layers, the content of the powder in the coating is gradually increased toward the upper layer, and between the substrate and the coating layer And a matte decorative body characterized by interposing a powder-free layer.

 Hereinafter, the present invention will be described in detail with reference to the drawings.

Reference numeral 1 indicates a metal-based substrate such as a metal such as iron, copper, aluminum, and zinc, or an alloy thereof, or a substrate such as ceramics, glass, and resin. The surface of the base material is provided with a plating layer by electroplating, electroless plating, or the like, or subjected to a chemical conversion treatment such as a phosphate treatment or a chromate treatment. Incidentally, reference numeral 4 in the drawing denotes a plating layer or a chemical conversion treatment layer.

A powder-free layer 2 is provided on a substrate 1, and the powder-free layer 2 is composed of a coating material that does not contain a primer, a clear, an enamel, and a powder generally used on the substrate 1. Are appropriately used, if necessary, alone or in combination of two or more.

A plurality of coating layers are formed on the powder-free layer 2, and the content of the powder in the coating layer is gradually increased toward the upper layer. For example, as shown in FIGS. 1 and 2, a first layer 3a and a second layer
The ratio of the powder contained in the first layer 3a and the second layer 3b in the layer 3b is
It is provided so that 3a <3b. As the coating material for forming the coating layer, a coating material containing a powder in a generally used coating material containing a resin binder and a pigment as main components is used.

Incidentally, a method of forming a single layer and gradually increasing the content of the powder in the layer in the upward direction is also conceivable. However, in this method, the coating is performed in the same manner as described in the above-mentioned conventional technique and its problems. The powder contained in the upper part of the film moves below the coating, and the amount of powder contained in the upper part of the coating decreases, resulting in a matte or pear-like coating with a high decorative effect. Therefore, in the present invention, a plurality of coating layers are formed, and the content ratio of the powder in the coating layers is gradually increased toward the upper layer.

The coating layers 3a and 3b are coating layers formed of a paint containing at least a pigment and a powder of silica.

Incidentally, the coating layers 3a and 3b in the present invention are not limited to those having two layers as shown in FIGS. 1 and 2, but may be a plurality of layers. It is most preferable to provide two layers from the viewpoint of the surface hardness, etc., and from the viewpoint of surface hardness, the content of the powder is approximately 1 to 50% by weight in the first layer 3a, and 3b
Is preferably 5 to 60% by weight.

As a method of providing the coating layers 3a and 3b, the above powder is added to a commonly used coating material, and mixed and dispersed by a stirrer such as a roll mill or a ball mill to obtain a matte-tone or matte-tone paint. Are sequentially applied onto the powder-free layer 2 by spraying, roll coating, or the like.

(Function) In the present invention, by providing a powder-free layer on the substrate, the adhesion of the coating film layer to the substrate is improved. A plurality of coating layers are provided by a paint containing at least a powder composed of the powder, and the content of the powder in the coating layer is gradually increased toward the upper layer, so that the powder is contained in the upper coating layer. This reduces the decrease in the amount of powder.

(Example) Example 1 An epoxy-based primer (X-12-41) was applied to a brass molded body.
3. Shin-Etsu Chemical Co., Ltd.) was applied to obtain a powder-free layer having a layer thickness of about 10 μm, and then an acrylic paint (Magiclon 1000)
Black, Kansai Paint Co., Ltd.) and silica powder (average particle size 2.3
μm, manufactured by Micron Co., Ltd.)
% By weight, and in a high-speed stirrer, using a paint obtained by sufficiently mixing and dispersing, applying by spraying on the powder-free layer, baking at 130 ° C. for 5 minutes,
A coating layer having a layer thickness of about 10 to 12 μm is provided, and on the coating layer, silica powder (average particle size 7.7 μm,
Micron) was added by 40% by weight based on the solid content of the paint, and the mixture was spray-coated using a paint obtained by sufficiently mixing and dispersing in a high-speed stirrer.
It baked at 30 degreeC for 30 minutes, provided the coating film layer of about 10-20 micrometers in thickness, and was used as the sample.

Example 2 A molded body of brass was washed with trichlene, subjected to rinsing degreasing and electrolytic degreasing, and then subjected to nickel plating in a Watt bath to obtain a substrate.

The base material is washed with water, dried, subjected to adsorption coating using an acrylic paint (Magiclon 1000 black, manufactured by Kansai Paint Co., Ltd.), and baked at 130 ° C. for 5 minutes to obtain a powder having a layer thickness of about 8 μm. An addition layer was obtained, and thereafter, a sample was obtained in the same manner as in the example.

Example 3 A layer thickness of about 8 was formed on a brass molded body in the same manner as in Example 2.
A powder-free layer having a thickness of μm was obtained, and a coating layer was provided as shown in the following table to obtain a sample. In the table below, silica powder manufactured by Micron Corporation was used.

Example 4 An epoxy-based primer (X-12-
413, Shin-Etsu Chemical Co., Ltd.) to obtain a powder-free layer having a layer thickness of about 10 μm, and apply an acrylic paint (Magiclon 1000 black, manufactured by Kansai Paint Co., Ltd.) on the powder-free layer. Use
Apply suction coating, bake at 130 ° C for 5 minutes, layer thickness approx.
A powder-free layer of μm was obtained, and then a sample was obtained in the same manner as in Example 1.

Comparative Example 1 In the same manner as in Example 1, a powder-free layer was provided on a base material, and an acrylic paint (Magiclon 10) was formed on the powder-free layer.
00 black, manufactured by Kansai Paint Co., Ltd.) and silica powder (average particle size 7.
7μm (manufactured by Micron Co., Ltd.)
% By weight, and in a high-speed stirrer, use a paint obtained by thoroughly mixing and dispersing, apply by spraying, bake at 180 ° C. for 30 minutes, and apply a coating having a layer thickness of about 10 to 12 μm. Layers were provided to serve as samples.

Comparative Example 2 An acrylic paint (Magicron 1000) was formed on a brass molded body.
Black, manufactured by Kansai Paint Co., Ltd.) with silica powder (average particle size 7.7)
μm, manufactured by Micron Co., Ltd.)
% By weight, and in a high-speed stirrer, use a paint obtained by thoroughly mixing and dispersing, apply by spraying, bake at 180 ° C. for 30 minutes, and apply a coating having a layer thickness of about 10 to 12 μm. Layers were provided to serve as samples.

(Effects) Using the samples obtained in Examples 1 to 4 and Comparative Examples 1 and 2, the results of an adhesion test, a reflectance test, and a boiling water test are shown in Table 1.

As described above, the decorative body obtained by the present invention is:
It has a matte or satin-finished coating film with a high decorative effect, has good adhesion, and does not easily peel off the coating film.

[Brief description of the drawings]

1 and 2 are longitudinal sectional views of a decorative body obtained according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Substrate, 2 ... Powder-free layer, 3a, 3b ... Coating layer, 4 ... Plating layer or chemical conversion treatment layer

Claims (1)

(57) [Claims] 1. A decorative body comprising a substrate and a coating layer provided with a coating material containing at least a pigment and a powder of silica, wherein the coating layer comprises a plurality of layers. A matte decorative body characterized in that the content of powder in a layer is gradually increased toward an upper layer, and a powder-free layer is interposed between a substrate and a coating layer.