JP6567904B2 - Film formation method - Google Patents

Description

  The present invention relates to a novel film forming method.

  The concrete exposed surface has a unique design and is widely used in buildings, civil engineering structures, and the like. Such a design of the concrete surface is expressed by a hue that changes continuously and slightly, and its appearance can give a natural and simple impression. However, deterioration of such a concrete surface progresses over time when affected by sunlight, rainfall, carbon dioxide gas, or the like. Conventionally, various methods for repairing the deteriorated concrete surface have been proposed.

  For example, in Patent Document 1, a base material containing white cement is applied to a concrete-exposed surface, and a finish material is applied thereon by pressing it with a patterning device covered with felt. The method of doing is described.

  However, although the method of the above-mentioned patent document can adjust the puttering according to the pressing pressure, the direction, or the number of times, there is a risk that the operation becomes complicated and the operation takes time. There is also a problem that a uniform pattern cannot be given depending on the skill of the operator.

JP-A-11-81610

  This invention is made in view of the above problems, and provides the film formation method which can form easily the pattern layer excellent in aesthetics, such as a concrete exposed tone pattern, with respect to a base material. Objective.

  In order to solve such a problem, as a result of intensive studies, the inventors applied a specific first coating material when forming a pattern layer after forming an underlayer on a substrate. After forming the underlayer, a specific second coating material was applied with a specific roller brush to arrive at a film forming method for forming a pattern layer, and the present invention was completed.

That is, the present invention relates to a film forming method having the following characteristics.
1. A film forming method for forming a pattern layer after forming a base layer on a substrate,
After applying a first covering material containing a synthetic resin and a pigment, and having a concealment ratio of the formed film of 90% or more, and forming the base layer,
A synthetic resin and a pigment, and the formed coating has a concealment ratio of 90% or more and a second coating material having a color tone different from that of the first coating material, and at least two or more liquid absorbing materials having different hardness and / or density are cylindrical. A coating film forming method, wherein the pattern layer is formed by applying with a roller brush mixed so as to be stacked in a cylindrical outer diameter direction of the outer peripheral surface.
2. The pattern layer is formed after drying the underlayer. The method for forming a film according to the above.
3. The coating amount of the second coating material is smaller than the coating amount of the first coating material. Or 2. The film forming method according to any one of the above.
4). The roller brush has an uneven shape on the outer peripheral surface of the cylinder. ~ 3. The film forming method according to any one of the above.

  In the film forming method of the present invention, the base material is formed by applying a first covering material containing a synthetic resin and a pigment and having a covering ratio of 90% or more to the base material. And a pigment, the covering ratio of the formed film is 90% or more, and the second coating material having a color tone different from that of the first coating material, and at least two or more liquid-absorbing materials having different hardness and / or density are formed on the cylindrical outer peripheral surface It is possible to easily form a pattern with excellent aesthetics by applying with a roller brush that is mixed with the roller.

FIG. 1 is a cross-sectional view of a roller brush used in the present invention.

1. Liquid absorbing material (1a to 1e)
2. 2. Cylindrical outer peripheral surface Cylindrical outer diameter direction

  Hereinafter, modes for carrying out the present invention will be described.

In the film forming method of the present invention, a first coating material is applied to a substrate to form an underlayer, and then a second coating material is applied by a specific method to form a pattern layer. According to the present invention, a natural pattern having a random and subtle color tone change can be obtained.
<Base material>
The base material constitutes a surface of a building, a civil engineering structure, or the like. Examples of such a substrate include concrete, mortar, siding board, extruded board, gypsum board, perlite board, plywood, brick, plastic plate, metal plate, glass, porcelain tile, and the like. These substrates may be those having a film already formed on the surface thereof. The present invention is particularly preferably applied to a concrete surface such as a concrete wall surface. Such a concrete surface is usually hardened and demolded by pouring the concrete, which is obtained by mixing and mixing cement, water, aggregates, and admixtures in an appropriate ratio, into the formwork or at a predetermined place. It is obtained by this. The present invention can be applied to either a newly provided concrete surface or a concrete surface that has deteriorated over time.

  In the present invention, prior to the formation of the base layer, some surface treatment may be performed on the base material in advance, if necessary. Surface treatments include, for example, unevenness of the base material, misalignment, repair of polymer mortar for burrows, injection of epoxy resin for cracked parts, etc., filling of polymer cement mortar and caulking materials, repair and reinforcement of floating parts Surface treatment with an alkali-imparting agent such as alkali silicate, removal of dirt with a cleaning liquid, treatment of a sealing material joint with a cloth or sealer, and preparation of a base by applying a filler, a surfacer, a sealer, a primer, or the like. These surface treatments are appropriately performed according to the condition of the base substrate.

<First covering material>
The 1st coating | covering material which forms a base layer has a synthetic resin and a pigment as an essential component. Among these, the synthetic resin is not particularly limited, and examples thereof include a vinyl acetate resin, a vinyl chloride resin, an epoxy resin, an acrylic resin, a urethane resin, an acrylic silicon resin, a fluorine resin, or a composite system thereof. 1 type (s) or 2 or more types can be used. Examples of such synthetic resins include water-soluble resins, water-dispersible resins, NAD-type resins, solvent-soluble resins, solvent-free resin types, and the like. Can do. In the present invention, a one-component type of a water-soluble resin and / or a water-dispersible resin is particularly preferable.

Examples of the pigment include a pigment (a) having a refractive index of 2 or more, an average particle size of 0.1 to 2 μm, and a whiteness of 95 or more (hereinafter also referred to as “component (a)”), a refractive index of less than 2, and an average particle size. Pigment (b) having a whiteness of 50 to less than 95 (hereinafter also referred to as “component (b)”), pigment (c) other than the above (a) and (b) (hereinafter referred to as “component (c)”) ")").
Examples of the component (a) include titanium oxide, zinc oxide, aluminum oxide, magnesium oxide, and hollow resin particles.
Examples of the component (b) include heavy pigments such as heavy calcium carbonate, precipitated calcium carbonate, kaolin, talc, clay, porcelain clay, china clay, barium sulfate, barium carbonate, quartzite powder, and diatomaceous earth.

Examples of the component (c) include carbon black, lamp black, graphite, black iron oxide, copper chrome black, cobalt black, copper manganese iron black, bengara, molybdate orange, permanent red, permanent carmine, anthraquinone red, perylene. Color pigments such as red, quinacridone red, yellow iron oxide, titanium yellow, first yellow, benzimidazolone yellow, chrome green, cobalt green, phthalocyanine green, ultramarine blue, bitumen, cobalt blue, phthalocyanine blue, quinacridone violet, dioxazine violet These particle diameters are preferably less than 50 μm (more preferably 40 μm or less, still more preferably 0.01 to 20 μm). In this invention, the 1 type (s) or 2 or more types chosen from the said (a) component, (b) component, (c) component can be used.

Here, the “refractive index” is a value measured using an Abbe refractometer. Further, the “whiteness” is a comparison value obtained by a white meter (ket type phototube whiteness meter) when the whiteness of magnesium oxide is 100 and the dark state is 0.

  The first covering material is characterized in that the formed film has a concealment ratio of 90% or more (preferably 93% or more, more preferably 95% or more). When the concealment rate is 90% or more, it is possible to obtain a desired finish easily and stably. In addition, it is possible to alleviate defects on the surface of the base material, contamination, etc., and improve aesthetics. The color in this case is preferably set to, for example, gray that approximates concrete.

The covering rate of the formed coating film was determined by applying the first covering material to the masking rate test paper with a film applicator (gap 150 μm) and in an environment at a temperature of 23 ° C. and a humidity of 50% (hereinafter referred to as “standard state”). The test piece obtained by drying for 24 hours is a value calculated by the following formula after measuring the luminous reflectance.
<Formula>
Concealment rate (%) = (luminous reflectance of coating film on black ground) / (luminous reflectance of coating film on white ground) × 100

Moreover, as a 1st coating material of this invention, what forms a matte film is preferable. In this case, it is possible to easily form a concrete exposed tone pattern with excellent aesthetics.
The “matte” referred to here includes not only what is generally called matte but also what is called three-minute gloss, five-minute gloss, and the like. Specifically, in the present invention, the gloss can be defined by the specular gloss. The specular glossiness in the first covering material is preferably 40 or less (more preferably 20 or less, still more preferably 0.1 or more and 10 or less).

  The “specular gloss” is a value measured according to JIS K5600-4-7 “specular gloss”. Specifically, the first coating material is applied to one side of a glass plate with a film applicator (gap 150 μm), the specular gloss (measurement angle 60) when the coated surface is horizontally placed and dried in a standard state for 48 hours. This is a value obtained by measuring (degree).

The concealment rate and gloss in the first coating material can be appropriately adjusted depending on the type, particle diameter, mixing ratio, and the like of the pigment blended in the coating material. The first covering material preferably includes the component (a), the component (b), and the component (c). As a preferable aspect of the pigment ratio in the first coating material, the component (a) is 10 to 500 parts by weight (more preferably 30 to 300 parts by weight, still more preferably 50 to 50 parts by weight) with respect to 100 parts by weight of the solid content of the synthetic resin. 250 parts by weight), 10 to 500 parts by weight (more preferably 30 to 300 parts by weight, more preferably 50 to 250 parts by weight) of the component (b), and 0.1 to 50 parts by weight of the component (c). (More preferably 0.5 to 20 parts by weight). In such a case, it is easy to obtain a concrete texture.

  In addition to the above components, the first coating material may include a plasticizer, a film-forming aid, an antifreezing agent, an antiseptic, an antifungal agent, an antibacterial agent, an antifoaming agent, a pigment dispersant, a thickener, Various additives such as a leveling agent, a wetting agent, a pH adjusting agent, fibers, an ultraviolet absorber, an antioxidant, a light stabilizer, an adsorbent, a catalyst, and a crosslinking agent may be included.

<Second covering material>
The second coating material for forming the pattern layer contains a synthetic resin and a pigment as essential components, and includes various additives as necessary. Each component can use the same thing as the said 1st coating | covering material.

The second covering material has a concealment ratio of the formed coating of 90% or more (preferably 93% or more, more preferably 95% or more), and has a color tone different from that of the first covering material. In such a case, various patterns can be formed by combining the color tone of the first covering material and the second covering material, and a pattern layer having excellent aesthetics can be formed. In the present invention, the color of the second covering material is preferably darker than that of the first covering material. In such a case, a more natural pattern can be given. For example, when forming a concrete exposed tone pattern, the color of the second covering material is preferably darker than that of the first covering material, and further set to gray or the like that is darker than the first covering material. It is preferable to do. Here, “dark” means that the lightness value L ^* (CIE L ^* a ^* b ^* color space) is lower than that of the first covering material.

Moreover, what forms a matte film as a 2nd coating | covering material of this invention is preferable. In this case, a more natural pattern can be given. In particular, it is possible to easily form a concrete exposed tone pattern with excellent aesthetics. The specular glossiness in the second covering material is preferably 40 or less (more preferably 20 or less, still more preferably 0.1 or more and 10 or less).

The concealment rate and gloss in the second coating material can be appropriately adjusted according to the type, particle diameter, mixing ratio, and the like of the pigment blended in the coating material. In the 2nd coating | covering material, what contains the said (a) component, (b) component, and (c) component is preferable. As a preferable aspect of the pigment ratio in the second coating material, 10 to 500 parts by weight (more preferably 30 to 300 parts by weight, more preferably 50 to 50 parts by weight) of the component (a) with respect to 100 parts by weight of the solid content of the synthetic resin. 250 parts by weight), 10 to 500 parts by weight (more preferably 30 to 300 parts by weight, more preferably 50 to 250 parts by weight) of the component (b), and 0.1 to 50 parts by weight of the component (c). (More preferably 0.5 to 20 parts by weight). In such a case, it is easy to obtain a concrete texture.

<Film formation method>
The film forming method of the present invention includes the following steps.
(1) First step of applying a first covering material to form an underlayer (2) A second covering material having a color tone different from that of the first covering material, at least two or more kinds having different hardness and / or density The second step of forming the pattern layer by applying the liquid absorbing material with the roller brush mixed on the outer peripheral surface of the cylinder

In said (1), it is preferable to apply the 1st coating | covering material to the whole surface with respect to a base material. As a coating method, various methods such as brush coating, spray coating, and roller coating can be employed. The coating amount is preferably 0.01 to 0.5 kg / m ² (more preferably 0.05 to 0.4 kg / m ² ). It is also possible to divide and apply a plurality of times within the range of the application amount.

  In said (2), a 2nd coating | covering material provides a pattern on a 1st coating | covering material, and at least 2 or more types of liquid absorption materials (FIG. 1) from which hardness and / or density differ as shown in FIG. : 1a to 1e) is formed by a roller brush mixed on the outer peripheral surface of the cylinder (FIG. 1: 2). By using such a specific roller brush, it is possible to impart a continuous and subtly changing pattern peculiar to the concrete surface. In particular, when the cylindrical outer peripheral surface has an uneven shape, a more natural pattern can be given. In the present invention, the outer diameter of the roller brush (FIG. 1: R) may be appropriately set according to the desired pattern, but is preferably 20 to 60 mm (more preferably 30 to 50 mm).

In the roller brush, examples of the liquid absorbing material mixed on the outer peripheral surface of the cylinder include felt, non-woven fabric, sponge material and the like, and at least two or more of these having different hardness or density (preferably 3 Mix more than seed). In the present invention, it is preferable to use a combination of two or more (preferably three or more) sponge materials. The hardness of each liquid absorbing material is preferably 10 to 3000 N (more preferably 20 to 2000 N, more preferably 30 to 1500 N), and the density is preferably 1 to 300 kg / m ³ (more preferably ^{3 to} 200 kg / m ^3). More preferably, it is 5 to 150 kg / m ³ ). By using a roller brush combined with such a liquid absorbing material, it is possible to form a pattern corresponding to the deformation of each liquid absorbing material, the transferability of the covering material, and the like. “Hardness” as used herein refers to the value of hardness (Method C) measured from the force when the specimen is compressed to a thickness of 40% according to JIS K6400-2. The “density” is an apparent density value calculated from the weight and dimensions of the test piece in accordance with JIS K7222.

In addition, the liquid absorbing material is preferably fixed so as to cover the outer peripheral surface of the cylinder, and at least two kinds (preferably three kinds or more) of liquid absorbing materials having different hardness and / or density are arranged in the cylinder outer diameter direction ( The form fixed so that it may be piled up on FIG. 1: 3) is more preferable. Furthermore, it is even more preferable that the plurality of liquid-absorbing materials are compression-molded so as to be mixed randomly in the outer circumferential direction and the outer radial direction. The effect of this invention can be heightened by using the roller brush which has such a liquid absorbing material.

  The liquid-absorbing material has a three-dimensional shape with an indeterminate outer shape, and the individual size thereof is preferably 1 to 30 mm (more preferably 2 to 20 mm). Such liquid-absorbing materials gather to form a liquid-absorbing material. In the present invention, it is preferable that a plurality of liquid absorbing materials having different sizes are mixed. In such a case, since the liquid absorbing materials having different sizes in addition to the hardness and / or density are randomly mixed on the outer peripheral surface of the cylinder, the effect of the present invention can be further enhanced. In addition, since irregular irregular shapes are easily formed between the liquid-absorbing materials, the effect of the present invention can be further enhanced. Here, the “size” is the longest axis of the outer shape, and is measured, for example, by sieving with a sieve having one side of a predetermined dimension. Moreover, although the thickness of the liquid absorption fixed to the cylinder outer peripheral surface is based also on the magnitude | size of each liquid absorption material, Preferably it is 50 mm or less (more preferably 1-30 mm, More preferably, 2-15 mm). Furthermore, in this invention, it is preferable to provide uneven | corrugated shape according to a desired pattern in the outer peripheral surface of a liquid absorption. Examples of the method for providing the uneven shape include a method of embossing at the time of compression molding of the liquid absorbent material, a method of partially removing the liquid absorbent material that has been compression molded, and the like. Thereby, the effect of the present invention can be further enhanced. In the case of partially removing the compression-molded liquid-absorbing material, a random uneven shape can be easily obtained according to a known method such as picking and turning.

In said (2), it is preferable to apply a 2nd coating | covering material after drying of a 1st coating | covering material. Thereby, the finish with high aesthetics can be obtained stably. In this case, the roller brush is preferably rolled and applied to the entire surface of the underlayer. The coating with the amount is preferably less than the coating with the amount of the first coating material, preferably 0.005~0.3kg / ^{m 2} (more preferably 0.01~0.2kg / ^{m 2)} is there. It is also possible to paint in a plurality of times within the range of the required amount. In such a case, a natural pattern having a random and subtle color tone change can be formed while taking advantage of the color tone of the underlayer, which is advantageous in terms of improving aesthetics.

In said (1) (2), application | coating of each coating | covering material and subsequent drying should just be preferably performed at normal temperature (0-40 degreeC).

  In the film forming method of the present invention, after the (1) first step or the (2) second step, a recess due to a cone mark (hereinafter referred to as “a recess”) can be repaired. It is desirable to repair the depression by applying a coating material darker than the color tone of the first coating material (preferably a coating material darker than the color tone of the first coating material and the second coating material) with a brush or the like. Thereby, a shading feeling is given to the depression.

In the film forming method of the present invention, a clear layer may be provided on the pattern layer as necessary. By providing a clear layer, not only the weather resistance and the like are improved, but also the color tone of the ground layer and the pattern layer is more harmonized, and the concrete surface has a texture that is continuously and subtly changed (and light and shade). Can be increased. Such a clear layer can be formed of, for example, a clear coating material using an acrylic resin, a urethane resin, an epoxy resin, an acrylic silicon resin, a fluorine resin, or the like as a binder. The clear coating material may be either water-based or solvent-based, matte type or glossy type. The clear coating material is preferably a low contamination type. Furthermore, coloring is possible as long as the effects of the present invention are not impaired. The clear coating material is preferably applied to the entire surface. As a coating method, various methods such as brush coating, spray coating, and roller coating can be employed. The coating amount is preferably 0.01 to 0.5 kg / m ² (more preferably 0.05 to 0.4 kg / m ² ). It is also possible to divide and apply a plurality of times within the range of the application amount.

  Examples are given below to clarify the features of the present invention.

(Manufacture of first covering material)
(Coating material 1-1)
For 200 parts by weight of the synthetic resin emulsion, 140 parts by weight of white pigment A, 40 parts by weight of extender pigment A40, 60 parts by weight of extender pigment B, 1.5 parts by weight of color pigment, additives (dispersant, antifoaming agent, thickener, Etc.) A coating material 1-1 (gray, L ^* = 76, glossiness 1.8) was produced by mixing and stirring 8 parts by weight by a conventional method.

(Coating materials 1-2 to 1-7)
Based on the formulation shown in Table 1, coating materials 1-2 to 1-7 were produced in the same manner as the coating material 1-1.

(Manufacture of second covering material)
(Coating material 2-1)
140 parts by weight of white pigment A, 200 parts by weight of extender pigment A40, 60 parts by weight of extender pigment B, 3 parts by weight of color pigment, additive (dispersant, antifoaming agent, thickener, etc.) A second coating material (gray, L ^* = 71, glossiness 1.8) was produced by mixing and stirring 8 parts by weight in a conventional manner.

(Coating materials 2-2 to 2-7)
Based on the formulation shown in Table 2, coating materials 2-2 to 2-7 were produced in the same manner as the coating material 2-1.

(Manufacture of hollow coating materials)
200 parts by weight of the synthetic resin emulsion, 50 parts by weight of white pigment A, 30 parts by weight of extender pigment A, 50 parts by weight of extender pigment B, 2 parts by weight of color pigment, additives (dispersant, antifoaming agent, thickener, etc.) A hollow coating material (gray, L ^* = 63, glossiness 2.0) was produced by mixing and stirring 8 parts by weight by a conventional method.

In addition, the following were used as a raw material.
・ Synthetic resin emulsion: Acrylic resin emulsion (solid content 50% by weight)
White pigment A: titanium oxide (whiteness 97, refractive index 2.71, average particle size 0.3 μm)
-Extender pigment A: talc (whiteness 60, refractive index 1.57, average particle diameter 4 μm)
-Extender pigment B: Kaolin (whiteness 80, refractive index 1.56, average particle size 6 μm)
・ External pigment C: heavy calcium carbonate (whiteness 89, refractive index 1.56, average particle size 36 μm)
-Extender pigment D: clay (whiteness 92, refractive index 1.55, average particle size 4 μm)
-Extender pigment E: silica powder (whiteness 90, refractive index 1.54, average particle diameter 18 μm)
-Extender pigment F: diatomaceous earth (whiteness 88, refractive index 1.46, average particle diameter 30 μm)
・ Coloring pigment: Carbon black

(Hidden coverage measurement)
Each of the first and second coating materials is applied to the concealment rate test paper with a film applicator (gap 150 μm) and dried for 24 hours in an environment of 23 ° C. and 50% humidity (hereinafter referred to as “standard state”). About the test piece obtained, the visual reflectance of the black ground coating film and the white ground coating film was measured using a color difference meter “CR-300” (manufactured by Minolta Co., Ltd.), and the concealment rate was calculated from these. . The results are shown in Tables 1 and 2.

Example 1
After washing and repairing the deteriorated part of the concrete surface that has partially deteriorated, the coating material 1-1 was applied with a wool roller so that the applied amount was 0.12 kg / m ^2, and in a standard state The underlayer was formed by drying for 3 hours. Next, the depression covering material was applied to the depression trace using a brush and dried. Further, five kinds of sponge materials 1 to 5 having different coating hardness 2-1 and different hardness and / or density as shown in FIG. 1 at a coating amount of 0.07 kg / m ² (each sponge material has a size of 2 to 18 mm). A pattern layer was formed by application with a roller brush (outer diameter 45 mm, liquid absorption thickness 2 to 10 mm) having a random uneven shape on the outer peripheral surface of the cylinder.
-Sponge material 1: Hardness 45-60N, density 50-100kg / m < ³ >
-Sponge material 2: Hardness 75-110N, density 15-30kg / m ³
-Sponge material 3: Hardness 110-140N, density 15-50kg / m < ³ >
-Sponge material 4: Hardness 110-300N, density 30-85kg / m ³
Sponge material 5: hardness 10-12 kN, density 5-15 kg / m ³

(Example 2)
The coating material 2-1 of Example 1 is a mixture of three kinds of sponge materials 2 to 4 (each sponge material is an irregular solid satisfying a size of 2 to 18 mm) having different hardness and / or density, and a cylindrical outer peripheral surface. A coating film was formed in the same manner as in Example 1 except that a pattern layer was formed by coating with a roller brush (outer diameter 45 mm, liquid absorption thickness 2 to 10 mm) having a random uneven shape.

(Example 3)
A coating film was formed in the same manner as in Example 1 except that the coating material 1-2 in place of the coating material 1-1 in Example 1 and the coating material 2-2 in place of the coating material 2-1 were used.

Example 4
A coating film was formed in the same manner as in Example 1 except that the covering material 1-3 was used instead of the covering material 1-1 of Example 1 and the covering material 2-3 was used instead of the covering material 2-1.

(Example 5)
A coating film was formed in the same manner as in Example 1 except that the coating material 1-4 in place of the coating material 1-1 in Example 1 and the coating material 2-4 in place of the coating material 2-1 were used.

(Example 6)
A coating film was formed in the same manner as in Example 1, except that the coating material 1-5 in place of the coating material 1-1 in Example 1 and the coating material 2-5 in place of the coating material 2-1 were used.

(Example 7)
A coating film was formed in the same manner as in Example 1 except that the covering material 1-6 was used instead of the covering material 1-1 of Example 1 and the covering material 2-6 was used instead of the covering material 2-1.

(Comparative Example 1)
A coating film was formed in the same manner as in Example 1 except that the covering material 1-7 was used instead of the covering material 1-1 of Example 1 and the covering material 2-7 was used instead of the covering material 2-1.

The appearance of the coating films formed in Examples 1 to 7 was a good finish that approximated the texture of the concrete surface as compared with Comparative Example 1. Especially, Examples 1-5 became the finishing which was excellent.

(Example 8)
A clear coating material (water-based acrylic silicone resin clear, matte type) is further applied on the film formed in Example 1 with a wool roller so that the applied amount is 0.1 kg / m ² , thereby forming a film. did. The appearance of the formed film was even better than Example 1.

Claims (4)

A film forming method for forming a pattern layer after forming a base layer on a substrate,
After applying a first covering material containing a synthetic resin and a pigment, and having a concealment ratio of the formed film of 90% or more, and forming the base layer,
A synthetic resin and a pigment, and the formed coating has a concealment ratio of 90% or more and a second coating material having a color tone different from that of the first coating material, and at least two or more liquid absorbing materials having different hardness and / or density are cylindrical. A coating film forming method, wherein the pattern layer is formed by applying with a roller brush mixed so as to be stacked in a cylindrical outer diameter direction of the outer peripheral surface.   The film forming method according to claim 1, wherein the pattern layer is formed after the underlayer is dried.   The coating formation method according to claim 1, wherein the coating amount of the second coating material is smaller than the coating amount of the first coating material. The said roller brush has an uneven | corrugated shape in a cylindrical outer peripheral surface, The film formation method in any one of Claims 1-3 characterized by the above-mentioned.