JPH0341229B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a relief pattern having deep irregularities.

[Industrial application field]

BACKGROUND ART Materials having relief patterns are widely used in various fields including exterior and interior applications of architecture.

[Conventional technology]

Traditionally, typical methods for forming relief patterns include (1) printing, (2) roller, (3) spraying, (4) embossing, and (5) etching. etc. are well known.

Although method (1) has the feature that patterns and colors can be freely selected, it is difficult to obtain a three-dimensional pattern with sufficient thickness, and the resulting coating film is generally It had a flat finish.

In addition, in method (2), unevenness is formed by stamping with a pattern roller, but only a simple repeating pattern can be formed;
It was not suitable for forming fine patterns.

Method (3) is optimal for forming random uneven patterns using a spray gun, but has the disadvantage that it cannot form specific patterns such as designs and letters.

Furthermore, although method (4) is suitable for mass production in factories, it is not suitable for applying different patterns to individual products.

Furthermore, method (5) is limited to materials that can be etched with a corrosive solution, and handling of the corrosive solution is also troublesome.

As mentioned above, each of the conventional methods has its advantages and disadvantages.

Therefore, in recent years, as an alternative to these conventional methods, a method has been proposed in which a coating film with a clear, non-random, arbitrary (non-bidirectional) relief pattern is formed on an arbitrary base material.

That is, the method involves applying a photocurable coating composition to a thickness of about 30 to 50 μm on a substrate, masking a part of the coated surface with a light-opaque material, or masking the pattern of the light-transmitting part. This method consists of closely adhering a light-impermeable sheet containing the same material, then irradiating it with ultraviolet rays to cure the coating in the exposed areas, and then removing the coating in the uncured areas to form an embossed pattern coating. be.

However, this method does not allow for thick coating (for example, several hundred microns or more) due to the characteristics of the photocurable coating composition or from a cost perspective. The drawback was that it could not be made deeper.

[Problem that the invention seeks to solve]

In view of the current state of the art in the field of relief patterns as described above, the present inventors have developed an arbitrary sharp uneven pattern.
As a result of extensive research into a method for easily forming a deeply carved uneven pattern that cannot be obtained using a photocurable coating composition without requiring any skill,
This led to the present invention.

[Means for solving problems]

That is, the present invention includes the steps of: () applying a water-based putty onto a base material and drying it to form a putty layer; () forming a pattern on the putty layer from a paint-permeable area and a paint-impermeable area; After placing the formed sheet or after placing the paint-impermeable sheet in a pattern, apply a water-resistant self-curing type on the paint-impermeable area or on the putty layer that is not covered with the paint-impermeable sheet. () removing the sheet and curing the paint film on the putty layer; and () leaving the paint film unapplied (exposed).
The present invention relates to a method for forming an uneven pattern, which comprises the steps of: washing and removing part or all of the putty layer;

In the method of the present invention, a pattern of a paint-impermeable sheet is placed on a putty layer formed on a base material according to the pattern of a sheet consisting of a paint-impermeable part and a paint-permeable part, or in a pattern. Forms a water-resistant paint film according to the conditions. Next, when these sheets are removed, no paint film is formed on the putty layer that was covered by the paint-impermeable sheet.
The putty layer becomes exposed.

In the present invention, in the subsequent removal step, part or all of the exposed putty layer is removed. On the other hand, the putty layer under the paint film is protected by the paint film and is therefore not removed. Therefore, it has the advantage of being able to form an embossed pattern with a sharp shape and deeper unevenness according to the pattern of the sheet.

In addition, in the present invention, by appropriately controlling the thickness of the putty layer and the degree of removal,
It has the advantage of being able to freely form embossed patterns with unevenness of a desired depth, not only those with shallow unevenness, but also those with deep unevenness. Furthermore, the method of the present invention has the advantage that since most of the relief pattern is made of a putty layer, it is possible to form a relief pattern with deep unevenness at a very low cost.

Hereinafter, the method for forming an uneven pattern of the present invention will be explained in more detail.

First, any known base material can be used as the base material used in the present invention. Examples include metals such as iron, aluminum, and stainless steel, glass, tiles, ceramics, concrete, bricks, stones, wood, leather, and plastics. The surface does not necessarily have to be flat,
For example, it may be a curved surface. These base materials can also be subjected to surface treatment, coloring treatment, etc., if necessary.

A water-based putty is applied onto these base materials and dried. As the water-based putty used in the present invention, water-based putty that has been conventionally available on the market can be used as is. Specific examples include 3 to 20 parts of an emulsion such as vinyl acetate resin emulsion, acrylic resin emulsion, vinyl chloride resin emulsion, etc., calcium carbonate, talc, silica, barium sulfate, kaolin, clay, diatomaceous earth, mica, etc. A composition consisting of about 30 to 80 parts of pigments consisting of extender pigments and various coloring pigments as necessary, about 0.2 to 10 parts of various additives such as thickeners, antifoaming agents, preservatives, wetting agents, etc., and an appropriate amount of water. It is a thing. It is also possible to add an appropriate amount of cement or the like to excessively increase the hardness of the water-based putty.

In the present invention, such a water-based putty is applied with a trowel, spatula, etc. to a dry film thickness of 0.5 to 20 mm, and then air dried at room temperature or forced drying at about 50 to 80°C. do. Drying does not have to be complete. For example, it is sufficient if you want to deform it by pressing it strongly with your finger.

For the water-based putty layer, in addition to using water-based putty of the same color, water-based putty of different colors can be applied multiple times. By forming multiple water-based putty layers with different colors in this way, in the removal process described later, by adjusting the removal degree (i.e. the depth of the recess) in each location, it is possible to create multi-colored putty layers depending on the depth. It becomes possible to form a varied uneven pattern.

Next, a sheet having a pattern formed of a paint-permeable part and a paint-impermeable part is brought into close contact with the putty layer.
Specifically, the sheet is preferably a silk screen commonly used in the paint industry.
Alternatively, a paint-impermeable sheet cut out in a pattern (to form a desired pattern) may be closely attached. In another embodiment, a paint-impermeable sheet can be closely attached to the putty layer so that the sheet forms a pattern.

After placing the sheet on the putty layer in this way,
A water-resistant, naturally curing paint is applied to the surface of the putty layer using a spatula, roll, spray, doctor blade, or other means.

As the naturally curing paint used in the present invention, any conventionally known paint can be used as is, as long as it has water resistance to the extent that the paint film does not peel off during the cleaning and removal process described below. Specifically, for example, acrylic resin type, alkyd resin type,
Solvent type and emulsion type paints such as urethane resin type, epoxy resin type, vinyl chloride resin type, and vinyl acetate resin type can be used.

It is desirable that the viscosity of the paint be 5 poise or higher (at 20° C.), as this enables the formation of sharper uneven patterns.

The thickness of the paint film is not particularly limited, but it is usually preferably about 20 to about 200 microns.

After applying the paint, the sheet is removed and the paint is allowed to harden. Curing conditions vary depending on the paint, but usually dry at room temperature for about 1 to 30 hours, or forced dry at about 50 to 80°C for about 10 minutes to 2 hours.

After the paint film is completely dried, part or all of the putty layer that is not covered with the paint film (exposed) is washed away.

As the removal method, a method of using a cleaning solution consisting of water or water and a solvent or a detergent, etc., and rubbing with a rotating brush, or a method of spraying the cleaning solution at high pressure, etc. can be adopted.

A relief pattern with deep relief is thus obtained.

In the present invention, it is also possible to add color, adjust gloss, etc., if necessary. Furthermore, in order to impart weather resistance, water resistance, chemical resistance, etc., another colored coating may be applied to the entire surface or the concave portions (or convex portions), or a coating such as clear or color clear may be applied to the entire surface. .

As described above, by the method of the present invention, it is possible to easily and inexpensively obtain a relief pattern having deep unevenness of any depth. Furthermore, by varying the pattern formed on the sheet, a desired uneven pattern can be easily obtained.

Furthermore, the uneven pattern obtained by the method of the present invention can be used for building materials, decorative items, etc., and has the advantage that it can be manufactured in a factory or on-site.

Hereinafter, the present invention will be explained in more detail with reference to Examples.

In the examples, "parts" and "%" are based on weight.

Example 1 10 parts of vinyl acetate emulsion (NV 60%), 19 parts of cellulose thickener (NV 4%), silica sand (200 mesh pass) were placed on an asbestos slate board (900 x 1800 x 10 mm) coated with acrylic emulsion sealer. ), 10 parts of talc (330 mesh pass), 0.2 parts of antifoaming agent, 0.2 parts of dispersant, 0.2 parts of preservative, and 10 parts of water was applied with a trowel, and dried at 60℃ for 30 minutes to determine the film thickness. A 3 mm putty layer was formed.

After lightly sanding the resulting putty layer with #120 paper,
Furthermore, the water-based putty was thinly spread over the entire surface with a spatula, and dried at 60° C. for 15 minutes.

Next, a silk screen (Note 1) with a pattern formed of a paint-permeable part and a paint-impermeable part was brought into close contact with the surface of the putty layer.

(Note 1) [Ultraviolet curing resin solution is placed on the base plate]
200g/m ² was applied and a 9x mesh polyester gauze was attached. A positive film with a pattern drawn on it was layered on top of this gauze, and the gauze and film were brought into close contact while expelling air bubbles with a roll. Next, the film was irradiated with ultraviolet rays to cure the ultraviolet curable resin located in the transparent part of the film, and the uncured resin was washed away with a solvent to create a silk screen. ] Next, apply a naturally curing acrylic resin clear paint (non-volatile content: 38%, viscosity: 10 poise) to a dry film thickness of 35 μm.
The silk screen was removed and dried at 60°C for 20 minutes to obtain a patterned cured coating.

Next, the exposed putty layer, which is not coated, is covered with a nylon thread (diameter 0.5 mm) that is rotated (500 rpm) at a rate of 8 min/m ² while pouring water (8/min).
It was rubbed with a bundled circular brush (φ120 mm) to remove part of the putty layer, drained and dried.

On the obtained surface, unevenness with an average depth of 2 mm was formed, corresponding to the pattern of the silk screen.

The surface of the coated object thus obtained had an extremely embossed pattern.

Example 2 On the same asbestos slate board as in Example 1, a water-based putty (gray color) having the composition shown below was troweled to a thickness of 3 mm and dried at 60°C for 10 minutes. Next, water-based putty (green) and water-based putty (yellow) having the following compositions were applied in the same manner to a thickness of 3 mm each to form a putty layer having a thickness of 9 mm and consisting of three layers.

<Water-based putty (gray)> Vinyl acetate emulsion (NV60%)...10 parts Cellulose thickener (NV4%)...19 parts Silica sand (200 mesh passes)...43 parts Talc (330 mesh passes)...10 parts Titanium oxide...6 parts Carbon black...1 part Additives...0.5 parts Water...10 parts <Water-based putty (green)> In the composition of water-based putty (gray), Phthalocyanine Green 7 is used instead of titanium oxide and carbon black. <Water-based putty (yellow)> In the composition of the water-based putty (gray), 7 parts of iron oxide (yellow) was used instead of titanium oxide and carbon black.Next, following the same procedure as in Example 1, the pattern was A cured coating film consisting of a naturally curing acrylic resin clear paint was obtained.

Next, the exposed putty layer, which has no paint film, is heated for 3 to 10 minutes while pouring water (8 minutes).
The putty layer was partially removed by rubbing with a circular brush similar to that in Example 1, rotating (500 rpm) for a random time at each location at a ratio of m ² , and then drained and dried. Next, an acrylic lacquer clear was applied to the entire surface.

The surface thus obtained had irregularities corresponding to the design, and the recesses were multicolored, ranging from gray to green to yellow, depending on their depth, resulting in an extremely embossed relief pattern. .

Claims (1)

[Claims] 1 () Applying a water-based putty on a base material and drying it,
Step of forming a putty layer: () After placing a sheet with a pattern formed by a paint-permeable part and a paint-impermeable part on the putty layer, or after placing a paint-impermeable sheet in a pattern. , a step of applying a water-resistant, naturally curing paint onto the putty layer, () a step of removing the sheet and curing the paint film on the putty layer, and () a step of removing the putty without the paint film applied. A method for forming an uneven pattern, comprising the steps of: removing part or all of the layer; 2. The method for forming an uneven pattern according to claim 1, wherein the sheet on which the pattern is formed is a silk screen. 3. The method for forming an uneven pattern according to claim 1 or 2, wherein the putty layer is composed of a plurality of putty layers of different colors. 4 The viscosity of the naturally curing paint is 5 poise or more (20
3C), the method for forming an uneven pattern according to any one of claims 1 to 3.