JPH02207873A - Method for decoration of surface to be decorated by metallic powder - Google Patents

Abstract

PURPOSE:To form the thin layer of the metallic powder held on an adhesive layer by adhering the metallic powder separate from the metallic powder incorporated into an adhesive on the surface of the adhesive layer coated with the adhesive agent contg. the above-mentioned metallic powder on a surface to be decorated. CONSTITUTION:The adhesive contg. the metallic powder 3 is applied on the surface 2 to be decorated of a gypsum board 1 to form the adhesive layer 4 on the surface 2. Before the adhesive of the adhesive layer 4 dries, the metallic powder of the same kind and the same grain size as the kind and grain size of the metallic powder incorporated into the adhesive is sprinkled in a gravity falling state from a feeder onto the surface of the adhesive layer and thereafter, the gypsum board 1 is turned upside down to face the adhesive layer downward and to allow the excess metallic powder 5 which dies not adhere to the board to fall by gravity and to remove the same. The thickness of the metallic powder layer 6 is 0.9mum and the appearance of the same kind as the appearance of gold foil is exhibited in the embodiment of consisting using the alloy powder consisting of 90wt.% copper and 10wt.% zinc and having 200 mesh grain size as the metallic powder and a polyvinyl acetate emulsion as the adhesive and compounding the adhesive at 10wt.% of the total weight of the adhesive and the metal powder.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for decorating a surface of a building material or the like to be decorated with metal powder.

(Background) In Japan, buildings have been decorated with gold or silver on their interiors and exteriors since ancient times, as seen in Hideyoshi's tea room and Kinkaku-ji and Ginkaku-ji temples.

(Prior art) Conventionally, gold or silver leaf has been used without exception for the gold or silver decoration of such building materials, and this is done by pasting these on the surface of the building material to be decorated with an adhesive such as glue. It is being said.

However, the conventional method described above has the following problems.

First, the preparation of gold leaf as a preparation for decoration required skillful work by sandwiching the gold between cowhide and spreading it into extremely thin foil, making the preparation laborious.

In addition, when applying this gold leaf to the surface to be decorated of building materials, it is necessary to apply it carefully so as not to wrinkle the gold leaf, especially if the surface to be decorated has unevenness. It required considerable skill.

After installation, if part of the gold leaf peeled off due to damage and the surface of the adhesive layer was exposed, the damaged area was easily noticeable because the surface of the adhesive layer had a large difference in color from the surrounding gold leaf.

If the gold leaf is partially damaged, it is necessary to repair the damaged area by cutting it out from the surrounding area and pasting new gold leaf on the cut out area.In this case, the new gold leaf and the surrounding gold leaf must be There was a risk that the border would be easily noticeable and spoil the aesthetic appearance.

[Previously proposed technology]

Therefore, prior to the present invention, the present inventors proposed a technique of preparing a paint mixed with metal powder and applying this paint to a surface to be decorated.

[Problem to be solved by the invention]

However, with the newly proposed technology, most of the metal powder is buried in the paint film, and relatively little is exposed from the paint film surface, so the luster and texture unique to metals such as gold leaf cannot be reproduced, and gold leaf It could not be used as a substitute.

The present invention was developed in view of the above-mentioned circumstances, and it is easy to prepare and install, makes damaged areas less noticeable, does not impair the aesthetic appearance even after repair, and has the unique luster of metal.
To provide a method for decorating a surface to be decorated with metal powder, which has excellent reproducibility of texture and can be used as a substitute for gold leaf or the like.

[Means to solve the problem]

In the present invention, for example, as shown in FIG. 1, an adhesive mixed with metal powder 3 or a coloring component exhibiting a metallic color is applied to the surface to be decorated 2 to form an adhesive layer 4 on the surface to be decorated, The present invention is characterized in that a metal powder 5 is adhered to the surface of the adhesive layer 4 in addition to the metal powder 3 to form a thin metal powder layer 6 held by the adhesive layer 4 on the surface 2 to be decorated.

The contents of each element will be explained below.

a. Type of the surface to be decorated 2. Although not particularly limited, the surfaces of construction materials such as plasterboard, plywood slopes, lightweight foamed concrete boards (A, L, C), synthetic resin boards, furniture materials and other board materials, and surfaces made of concrete Any surface of a flower pot or other irregularly shaped object can be decorated, and it is not limited to a flat surface.
It can also be suitably used for curved surfaces, uneven surfaces, and other irregularly shaped surfaces.

b. Type of adhesive The adhesive may be selected depending on the material of the surface to be decorated 2, and emulsion type synthetic resin adhesives such as polyvinyl acetate emulsion, solvent type synthetic resin adhesives, concrete, etc. can be used.

The means for applying the C0 adhesive may be selected depending on the type of surface 2 to be decorated and the type of adhesive, and any means such as a roller, spray, or trowel may be used.

d. Types of metal powders 3 and 5 Although not particularly limited, various metal powders can be used, such as gold powder, silver powder, copper powder, zinc powder, nickel powder, chromium powder, or alloy powder with any blending ratio of these powders. can.

e. The particle size of the metal powders 3 and 5 is not particularly limited, but is preferably 100 to 350 mesh. If the particle size is less than 100 mesh, the metal powder thin layer 6
The surface condition becomes rough, making it impossible to reproduce the clean surface condition of gold leaf or silver foil.On the other hand, if the particle size exceeds 350 mesh, the luster decreases;
This is because in the case of 50 meshes, there is no such defect.

Note that as the particle size increases, the texture can be gradually changed from smooth to rough.

f. The blending ratio of metal powder 3 mixed into the adhesive is not particularly limited, but the ratio of metal powder 3 to the total amount of adhesive and metal powder 3 is
It is desirable that the amount of metal powder 3 is 3 to 80% by weight. If the blending ratio of metal powder 3 is less than 3% by weight, the amount of metal powder 3 exposed on the surface of adhesive layer 4 is small, and When the metal powder 5 of the metal powder thin layer 6 formed on the surface partially peels off, there is a large difference in color tone between the exposed surface of the adhesive layer 4 and the surrounding metal powder thin layer 6, and the metal powder The peeled off portion of the thin layer 6 is relatively noticeable. On the other hand, if the blending ratio of metal powder 3 exceeds 80% by weight, the adhesive strength of the adhesive will decrease.

On the other hand, if the blending ratio of the metal powder 3 is 3 to 80% by weight, such defects will not occur.

g. Coloring component that exhibits a metallic color Either pigments or dyes may be used.

h. The means for adhering the metal powder 5 to the surface of the adhesive layer 4 is not particularly limited, but may include sprinkling the metal powder 5 on the surface of the adhesive layer 4 in a natural fall state before the adhesive of the adhesive layer 4 dries; or It is conceivable to spray the metal powder 5 onto the surface of the adhesive layer 4 using air.

Further, the excess metal powder 5 not adhered to the adhesive layer 4 may be removed by tilting the surface 2 to be decorated or by blowing air onto the surface 2 to be decorated.

i, the thickness of the metal powder thin film 6 varies depending on the type of adhesive, the particle size of the metal powder 5, and the means for adhering the metal powder 5 to the surface of the adhesive layer 4, but is 0.1 to 100
It is about μm.

〔effect〕

Preparation for the decoration requires only the simple work of preparing metal powder and mixing the metal powder into the adhesive. Preparation for decoration is easy without requiring skilled work such as forming.

During installation, all you need to do is apply adhesive to the surface to be decorated and adhere metal powder to the surface of the adhesive layer.
Unlike conventional decorations using gold leaf, etc., it does not require skilled work such as adhering while being careful to avoid wrinkles, and is easy to apply.

After installation, even if a part of the thin metal powder layer peels off due to damage and the surface of the adhesive layer is exposed, the metal powder mixed in the adhesive will be exposed on the surface of the adhesive layer, so conventional gold leaf etc. Unlike the case where there is a large difference in color between the adhesive surface of the damaged area and the surrounding gold foil, the difference in color between the surrounding thin layer of metal powder is small and the damaged area is difficult to stand out.

To repair a part of the thin metal powder layer that has peeled off due to damage, simply apply adhesive to the repaired area and adhere the metal powder to the surface of the adhesive layer, just as you would during construction. In this case, the boundary between the metal powder in the repaired area and the metal powder in the thin layer of metal powder surrounding the repaired area becomes unclear, so the boundary between the repaired areas is easily noticeable as in conventional gold leaf repairs. Unlike conventional products, repairs do not damage the aesthetics.

〔Example〕

As shown in FIG. 1(A), the decorated surface 2 of the plasterboard l
An adhesive in which metal powder 3 was mixed was applied to form an adhesive layer 4 on the surface to be decorated 2.

The metal powder 3 is an alloy powder of 90% copper and 10% zinc with a particle size of 200 mesh, and the adhesive is a polyvinyl acetate emulsion, and the metal powder 3 is mixed into the adhesive. The ratio is 1 to the total amount of adhesive and metal powder 3
0% by weight, and application to the decorated surface 2 was performed using a roller.

Next, as shown in FIG. 1(B), before the adhesive of the adhesive layer 4 dries, metal powder 5 of the same type and particle size as the metal powder 3 mixed in the adhesive is allowed to fall naturally from the feeder. Then, as shown in FIG. 1(C), turn the plasterboard l over so that the adhesive layer 4 is facing downward, and sprinkle any excess metal that is not adhered to the adhesive layer 4. Powder 5 was removed by gravity.

The thickness of the metal powder thin layer 6 formed of the metal powder 5 remaining on the surface of the adhesive layer 4 was 0.9 μm.

This metal powder thin layer 6 had an appearance almost similar to gold foil.

[Comparative Example 1] A thin layer of metal powder was formed on the surface to be decorated via an adhesive layer in the same manner as in Example 1 except that no metal powder was mixed in the adhesive.

The thickness of the metal powder thin layer was 0.9 μm.

[Comparative Example 2] Gold foil was adhered to the decorated surface of a gypsum board via an adhesive.

[Test Example 1] Part of the thin metal powder layer applied to the decorated surface of each plasterboard obtained in Example 1 and Comparative Example 1 was scraped off in an area of 11 squares to expose the surface of each adhesive layer. and make these about 2
Visual observation was made from a distance of m.

As a result, in Example 1, metal powder mixed in the adhesive was observed on the surface of the exposed adhesive layer, and the surface was close in color to the surrounding thin metal powder layer and was relatively inconspicuous. On the other hand, in Comparative Example 1, the exposed surface of the adhesive layer exhibited a white color, which is the color of the adhesive itself, and the difference in color tone from the surrounding metal powder thin layer was large and relatively easy to stand out.

From the above results, it has become clear that by mixing metal powder into the adhesive, even if the thin layer of metal powder peels off due to damage, the damaged area is less noticeable.

[Test Example 2] A portion of the metal powder thin layer or gold leaf applied to the decorated surface of each plasterboard obtained in Example 1 and Comparative Example 2 was scraped off in a square area, and the surface of each adhesive layer was removed. exposed.

Next, the thin metal powder layer was repaired on the surface of the exposed adhesive layer of the gypsum board obtained in Example 1 using the same method for forming a thin metal powder layer.

Furthermore, gold foil was repaired on the surface of the exposed adhesive layer of the gypsum board obtained in Comparative Example 2 using the gold foil bonding method of the same example.

These were then visually observed from a distance of approximately 2 m.

As a result, in Example 1, the boundary between the repaired area and its surroundings was hardly noticeable, whereas in Comparative Example 2, the boundary between the repaired area and its surroundings was clearly visible and very noticeable. Ta.

From the above results, it has become clear that when decoration is applied with a thin layer of metal powder and repair is performed with metal powder, the boundaries of the repaired area are less noticeable.

[Brief explanation of the drawing]

FIGS. 1A to 1C are diagrams illustrating a method of decorating a surface to be decorated with metal powder according to an embodiment of the present invention. 2... Surface to be decorated, 3... Metal powder, 4... Adhesive layer, 5... Metal powder, 6... Metal powder thin layer.

Claims (1)

[Claims] 1. An adhesive mixed with metal powder 3 or a coloring component exhibiting a metallic color is applied to the surface 2 to be decorated, and an adhesive layer 4 is applied to the surface 2 to be decorated.
is formed, and a metal powder 5 is adhered to the surface of the adhesive layer 4 separately from the metal powder 3 to form a thin metal powder layer 6 held by the adhesive layer 4 on the surface to be decorated 2. Decoration method using metal powder on the surface to be decorated