JPS581771A - Formation of adhesive coating film - Google Patents

Abstract

PURPOSE:To form an adhesive coating film which is conformable to an uneven surface of a substrate when applied, by attaching a protective separator to an adhesive layer formed by applying an adhesive on the surface of a thin base sheet consisting of nonwoven fabric, applying powder paint-contg. liquid coating on the other side and melting the powder paint under heat to form a powder coating film. CONSTITUTION:A self-adhesive or adhesive 2 is applied on one side of a thin base sheet 1 consisting of nonwoven fabric made from pulp or nylon fiber and the adhesive layer is protected with a separator 3. A colored or clear powder paint 5 made from EVA, etc. which retains flexibily even afeter curing, is mixed thoroughly into a colored or clear liquid coating 4 consisting of polyurethane, etc. which retains flexibility even after curing. The mixt. is applied on the other side of base sheet 1, followed by heating. Thus, a fusion bonded layer 50 with an embossed surface 51 is formed and an embossed adhesive coating film A is obtained. The film A can be bonded to a substrate with an uneven surface by pressing with finger.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a coating film for adhesion, and an object of the present invention is to uniformly reproduce the uneven surface of a workpiece having an uneven surface while faithfully reproducing the uneven surface. It is an object of the present invention to provide a method for forming a coating film that can be attached and has a flat surface or an embossed surface to color a construction object, or has a waterproof effect.

Conventional painting is performed for various purposes such as waterproofing, rust prevention, antiseptic, chemical resistance, etc. in addition to giving aesthetic color to the painted surface, but when there are irregular irregularities on the surface of the object to be painted, A common method for painting without destroying or modifying the uneven state is to apply a liquid paint. There is also a method of attaching a colored plastic film with adhesive strength to the back surface only when the surface of the object is smooth.

In the former case, the thin layer 8-
? Thick parts 9 occur, the coating film (B) is uneven, and there are cracks @ and paint loss to porous parts T, and in the case of large racks 61, recesses 63 may occur on the painted surface. When cracks 62 occur after the gallery is finished, the fractured parts 64 of the paint film not only impair the aesthetics, but also cause rain stains.

In addition, in the latter case, the film has a hardness that makes it easy to cut, and even if it is forcefully applied to an object having an uneven surface, the film does not adhere to the entire surface and is easily peeled off.

In contrast, the method of the present invention provides a coating film for adhesion that solves the above-mentioned drawbacks. The configuration will be explained below based on the drawings.

In the drawings, Figures 1 to 6 are cross-sectional views of the coating film formed to explain the present invention in detail, Figure 7 is a cross-sectional view of the paint film with the embossed surface adjusted, and Figure 8 is a cross-sectional view of the coating film with the embossed surface adjusted. FIG. 9 is a cross-sectional view of a coating film formed using the FIAK according to the present invention, and FIG. 10 is a cross-sectional view of a coating film formed using a conventional liquid paint.

Figure 1 f), One side of the base material 1, which is a thin film-like nonwoven fabric made of pulp, rayon, polyester, polypropylene, polyethylene, nylon, etc., or a thin film-like nonwoven fabric made of a combination thereof, and has a flexibility of about 10 to 30 μm. A pressure-sensitive adhesive or adhesive 2 is applied and impregnated as shown in FIG. 2 and protected with a separator 3 as shown in FIG. (The case of coating and impregnating the adhesive or adhesive from both sides of the base material will be described later.) The base material 1 is preferably a long-fiber nonwoven fabric with unbroken fibers, and in particular, a material that also has weather resistance, such as polyester. However, even if there are short fibers,
Materials other than polyester are not disadvantageous for the purpose of the present invention.

The pressure-sensitive adhesive or adhesive 2 is selected depending on the use of the formed coating film (4). In other words, if the formed adhesive coating is to be used for a short period of time on the object, a weak adhesive is used to make it removable, and if it is to be permanently attached, a strong adhesive is used. .

The separator 3 is preferably made of base paper impregnated with silicone and is resistant to the heating process. In other words, it is very similar to a sheet of the same thickness of the adhesive or adhesive itself.

In other words, if you press it with your finger against an extremely irregular and severely uneven surface, it will follow the shape of the unevenness and stick to it. Although relatively difficult to create, the purpose of the present invention can also be achieved by using a sheet of the adhesive or adhesive itself instead of a nonwoven fabric coated and impregnated with the adhesive or adhesive. can do.

Next, a liquid paint 4 such as polyurethane, alkyd resin, polyvinyl chloride, 7-tun resin, silicone resin, or acrylic resin, which is colored or transparent and has flexibility after curing.
A light-colored or colored (preferably the same color as the above liquid paint) powder, such as ethylene vinyl acetate (]i:VA), polyurethane, etc., which is flexible after curing, is added to Sufficiently mix paint 5 (Fig. 4). Although the mixing ratio is not Km@, it is better to have a relatively large amount of powder paint, preferably a weight ratio of powder paint to liquid paint of 0.
5:1 to 1.521. More preferably, the ratio is about 1:1. In this case, the solvent used in the liquid paint must not disturb the powder paint, but today's powder paints are quite resistant to solvents, so the liquid paint and the powder There is no problem as long as you avoid leaving the body paint mixture undisturbed for more than 24 hours.

Next, the mixture of the liquid paint and powder paint is sprayed,
It is applied to the surface of the base material 1, which has been coated and impregnated with an adhesive or adhesive by another method, on the opposite side from the separator 3 (FIG. 5).

At this time, the powder coating material sinks into the interior of the liquid coating film, and at the same time, its top portion protrudes from the top surface of the liquid coating film to form a very densely packed, embossed uppermost layer surface.

In this case, one side of the base material is protected with a separator, and the other side is colored with a liquid paint that is colored and has flexibility after curing.
After curing, if you apply a transparent liquid paint on top of it, or a transparent liquid paint mixed with the powder paint of the same color as the liquid paint,
A final product is obtained in which the colored coating layer is retained by a transparent coating layer. Furthermore, when an ultraviolet absorber is included in the transparent liquid paint, the weather resistance of the final product is improved.

When heat treatment is then performed, a fusion layer 50 having an embossed surface 51 having a cross section as shown in FIG. 6 is formed, and an embossed adhesive coating IF(A) is formed.

Heating conditions are 110℃~1 for Evh powder powder paint use.
50°C, 150°C to 190°C for 2 minutes for polyurethane
By adjusting these conditions, the embossed surface 5
1 can be adjusted as shown in FIG. 7 to form the fusion layer 50. Also, as shown in Fig. 8 (a flat surface 52 can be used), the adhesive or adhesive 2 and separator 3 should be those that do not cause performance deterioration under the above heating conditions. - The heating method is the conventional one for drying liquid paints. (It may be a hot air type or a far-infrared device that is used.) There is no particular restriction on the method used.

Through the above process, the powder paint protruding from the top of the liquid paint film is melted to form a continuous paint film surface. That is, the coating film 4 made of the liquid paint is strongly adhered to the surface of the base material 1, and the coating film 50 made of the powder paint is further adhered on top of the coating film 4 made of the liquid paint. It is an essential condition for the purpose of the present invention that these coating films be selected to have flexibility after curing.

By doing this, the coating film (4) having an adhesive or adhesive on one side can sufficiently follow even the surface of objects with severe and irregular irregularities by pressing it with a finger or hand.
Can be closely attached.

In addition to ethylene vinyl acetate (gvA), powder coatings such as nylon and polyethylene can also be used if the heat resistance of the pressure-sensitive adhesive or adhesive is improved.

When applying and impregnating the adhesive or adhesive from both sides of the base material 1, as shown in Figure 5, 2 and 4 in the figure become the adhesive or adhesive layer, and a mixture of liquid paint and powder paint is applied to the 4 sides. It is applied and then heated and fused.

The reason why not only a liquid paint but also a transparent or colored powder paint is used in the present invention will be explained.

The gist of the present invention is to provide an alternative to the conventional liquid coating method as a method for coloring areas where weather resistance is particularly required, such as on the walls of buildings. That is, when comparing the conventional liquid coating and the adhesive coloring of the product of the present invention, the present invention has many excellent features as described below (I can list them, but in addition, for example, coloring in dangerous areas Due to its excellent weather resistance, the product of the present invention can significantly extend the recoloring cycle.In other words, in addition to the ability to freely select colors using liquid paint, the product of the present invention has transparent coating on the top layer. Alternatively, by forming a powder coating film of the same color as the liquid paint, it simultaneously achieves the excellent preservation function of the powder coating film for the object to be coated, and the free coloring function of the liquid paint. To explain its specific effects using the example of painting concrete walls and extremely high chimneys, conventionally, it was only possible to "paint" objects with irregularly uneven surfaces using liquid paint. Coloring that faithfully reproduces uneven surfaces,
With the appearance of the adhesion coating film of the present invention, it is now possible to add coloring, decoration, and waterproof effects to "adhering work" that previously could not be done.
This was realized by K, and the following secondary effects also occur.

(Illusion) There is no need to protect the area around the construction site because it does not pollute it (there is much less electrical work required).

(b) During construction, no solvents are used and there is little chance of soiling the construction personnel, so the hassle of the work is significantly reduced.

(e) Construction tools and machinery are rarely needed for pasting work.

(d) There is no need to wait for drying after construction is completed.

(e) There is little color unevenness, so highly skilled technicians are not required.

(f) Pasting work requires less time on site than painting work, so it is less dangerous, such as at night, in dangerous areas, and during strong winds in winter.
Not only is it advantageous in terms of welfare, but labor costs are also low.

(g) The coating film for adhesion can be cut with a cutter knife or the like, so the color boundaries are clear.

(h) When the object is porous and a large amount of liquid is to be injected into the object, the product of the present invention is very advantageous in that there is little loss.

(1) It is possible to adjust the performance of the pressure-sensitive adhesive or adhesive that is applied and impregnated onto the base material. This can be a short-term adhesive and peel off, or a permanent adhesive.

(J) It is possible to maintain the aesthetic appearance and waterproof function by responding flexibly to the orac that naturally enters the wall of the building.

[Experiment example]

In the above steps, what should be particularly considered is whether the powder coating film 50 on the uppermost layer forms a truly continuous surface. The purpose of the present invention is to make a powder coating with excellent coating performance available in stores as a portable adhesive coating. In other words, even if it is possible to color an irregularly uneven surface by adhering it to the surface, the gist of the present invention can be largely avoided.

Therefore, we tried the following experiment.

A transparent polyvinyl chloride liquid paint was mixed with 10% of a vulcanizing agent and a black EVA powder paint in a weight ratio of 1:1, and the mixture was thoroughly stirred. Then, a white adhesive colored with titanium is coated and impregnated on one side of the pure white thin film-like non-woven fabric on q#, and it is protected with a separator, and the other side is coated with the transparent liquid polyvinyl chloride paint. A mixture of black mymu powder paint was applied by spray. This was then held in a hot air drying oven at 120°C for 5 minutes. When taken out from the drying oven, a black coating film had been formed on the entire surface. I observed it with an 80x magnifying glass, but the observation results were the same. Subsequently, according to process 11 of the present invention, a coating film formed by mixing a transparent EVA powder coating in a 1=1 mixture of a purple vinyl chloride liquid paint with poor color fastness, and a coating film formed by mixing only a purple vinyl chloride liquid paint At the same time, the double layer of powder coating and liquid coating formed by the above process according to the present invention forms a continuous surface sufficient to withstand the application. That has been proven.

As described above, the present invention is a method of forming a coating film for adhesion using a powder coating, and the coating film is
It has the many effects described above.

[Brief explanation of drawings]

Figures 1 to 6 are cross-sectional views of the coating film formed to explain the present invention in detail, Figure j1g7 is a cross-sectional view of the coating film with the embossed surface adjusted, and Figure @8 is the coated film with a flat surface. FIG. 9 is a cross-sectional view of a coating film for adhesion formed according to the present invention, and FIG. 10 is a cross-sectional view of a coating film formed using a conventional liquid paint. 1... Base material, 2... Adhesive or adhesive, 3... Separator, 4... Liquid paint, 5... Powder paint, 5
0... Fusion layer, 51... Embossed surface, 52... Flat surface, 6... Crack, 61... Crack, 6
2... Cracks generated after construction, 63... Recesses, 64.
... Paint film fragmentation part, T... Porous part, 8... Thin layer part,
9: Thick part, M: Adhesive coating film according to the present invention, B: Coating film using conventional liquid paint. Horse 1 Infection 4 Diagram

Claims (4)

[Claims] (1) (a) Adhesive or adhesive on both or one side of a base material made of a thin film-like nonwoven fabric made of pulp, rayon, polyester, polypropylene, polyethylene V, nylon, etc., or a thin film-like nonwoven fabric made of a combination thereof. It is coated and impregnated with an adhesive, protected with an adhesive or adhesive layer on one side, and the other side is colored or transparent with a colored or transparent powder coating mixed with curing flexibility. A method for forming ms for pasting, which comprises applying a liquid Ik stick that is flexible after hardening, and then heating and melting the powder coating to form a powder*film. (2) The method according to claim 1, wherein the surface of the coating film to be formed is adjusted to a flat surface or an embossed surface by adjusting the heating conditions of the 11-body paint. (3) After protecting one side of the base material with a separator, the other side is colored with a liquid paint that is colored and has flexibility after curing.
2. The method according to claim 1, wherein after curing, the transparent liquid paint mixed with the powder paint of a transparent color or the same color as the liquid paint is applied thereon. (4) The method according to claim 1, wherein an ultraviolet absorber is contained in the transparent liquid paint.