KR20170001959A - Coating method - Google Patents

Abstract

The present invention provides a coating method which can be easily completed with a shape-type coating of a large shape by roller coating.
The coating method of the present invention is characterized in that a coating material is applied using a special porous roller having a plurality of independent grooves.

Description

{COATING METHOD}

The present invention relates to a novel coating method.

As a material for forming a coating film of a brilliant color by a single coating, a coating material having a constitution in which two or more color particles are dispersed can be given. According to such a coating material, it is possible to complete a patterned design in which the color grains of two or more colors are embedded, and these materials are suitably used in the walls of buildings in recent years.

In recent years, preference is given to a design in which the shape of each color portion, such as that seen in the design of a natural stone, is clearly recognized even when a small distance is provided.

On the other hand, a spray type apparatus represented by a spray gun is usually used for coating the coating material (for example, Patent Documents 1 and 2). However, from the viewpoint of material loss and the like, a roller-type mechanism has recently been adopted.

Also in the case of the above coating material, conversion to a roller-type mechanism is proceeding. However, in the case of using a roller-type apparatus, transferring from the roller to the backing sheet is not performed well, and a large-sized shape as desired can not be obtained, It is difficult for an experienced person to complete the design with a large-sized design.

In view of such a problem, for example, Patent Document 3 discloses a technique of applying a porous roller and then expanding the surface with a special trowel to complete the shape of the large-sized design. However, in this technique, a finishing process by trowel is required separately from the roller coating, which is not an easy method.

Japanese Patent Application Laid-Open No. 2007-175650 Japanese Patent Application Laid-Open No. 2013-049017 Japanese Patent Application Laid-Open No. 2006-326494

Increasing the process in the coating process increases the construction cost or prolongs the construction period, so shortening the process is one of the important tasks in coating. Under such circumstances, a simple method is also required for roller coating to be completed with a large shape design.

As a result of intensive investigation to solve these problems, the inventors of the present invention have found that completion of a design having a large size can be easily accomplished by roller coating by using a special roller, and the present invention has been completed.

That is, the present invention has the following features.

1. A coating method using a roller, wherein the roller is a porous roller, the surface of the porous roller has a plurality of independent grooves, and the roller is used to apply a coating material containing particles of 0.2 cm or more in size to the substrate Lt; / RTI > coating material.

2. The coating method according to 1, wherein the total area of the grooves on the surface of the porous roller is 20% or more and 80% or less of the entire surface of the roller.

3. The coating method according to 1 or 2, wherein the grooves have a size of 0.3 cm or more and 3 cm or less.

4. The coating method according to any one of 1 to 3, wherein the grooves have a depth of less than 1 mm and less than 15 mm.

5. The coating method according to any one of 1 to 4, wherein the thickness of the porous roller is 1 mm or more and less than 15 mm.

According to the coating method of the present invention, it is possible to easily carry out the completion of the shape design of a large size type by roller coating.

1 is an example of a roller used in the present invention.
2 is an enlarged view of the surface of the porous layer in Fig.
3 is an enlarged view of a cross section of a porous layer having an open hole and an independent hole.
4 is an enlarged view of a cross section of a porous layer having a communication hole.

Hereinafter, embodiments for carrying out the present invention will be described in detail.

The present invention relates to a coating method using a roller, wherein the roller is a porous roller, and the surface of the porous roller has a plurality of independent grooves. By using such a roller, a coating material containing particles having a size of 0.2 cm or more is applied to a base material, so that it can be easily completed with a large shape design.

In addition, the term " large size " means a size capable of recognizing a shape by eyes, specifically, a size of 0.2 cm or more. In addition, a large-sized shape is a shape having the above-described large grain, and a shape capable of recognizing the grain even in a place with a small distance.

<Porous roller>

The porous roller used in the present invention is, for example, as shown in Fig. 1, in which a porous layer is provided on the outer surface of a cylindrical core member, and the cylindrical core member is provided with a handle And a handle shaft can be mounted on the cavity.

The cylindrical core material is not particularly limited and may be made of, for example, a core material made of plastic, wood, metal or the like. In order to improve the adhesion between the handle shaft and the core material, A reinforcing material such as paper, rubber, glass, metal, or fiber may be used.

The porous roller of the present invention has a plurality of independent grooves on its surface (the surface of the porous layer constituting the porous roller). The term &quot; independent grooves &quot; refers to grooves that are present in a state where the adjacent grooves are separated from each other by the porous material of the porous layer on the surface of the porous layer. By using such a porous roller, the coating material is applied to the entire surface of the substrate because particles enter the groove and the coating material component adheres to a hole described later. As a result, the three-dimensional pattern shape due to the groove is difficult to be transferred, It is possible to transfer a large-sized shape by the coating material to the substrate surface.

The shape of one groove is not particularly limited when viewed from the surface of the porous roller, such as a circular shape, a triangular shape, a square shape, a hexagonal shape, or a polygonal shape.

When viewed from the porous roller surface, the size of one groove is preferably 0.3 cm or more and 3 cm or less, more preferably 0.5 cm or more and 2.0 cm or less, further preferably 0.7 cm or more and 1.5 cm or less, and most preferably 0.9 Cm or more and 1.2 cm or less. With such a size, it is easy to transfer onto a substrate while maintaining the size or shape of the particles of 0.2 cm or more in size contained in the coating material. For example, when the circle is a circle, the diameter is Lcos. When the length of one side is L, Lcos30 占 4 / 3, the length of a diagonal line in the case of a square, the diameter of a circumscribed circle in the case of a regular hexagon, and the like.

The shape and size of the groove refer to the shape and size on the surface of the porous roller.

The size of the plurality of grooves provided on the surface of the porous layer is preferably 1.5 times or more (more preferably, 2 times or more) larger than the size of the hole described later.

The total area of the grooves (total area of the grooves) on the surface of the porous roller is preferably 20% or more and 80% or less, more preferably 25% or less, Or more and 70% or less, more preferably 30% or more and 60% or less, and most preferably 35% or more and 50% or less. By setting the total area of the grooves in the roller surface within the above-mentioned range, it is possible to efficiently and easily finish the large-sized shape.

The ratio (%) of the total area of the grooves on the surface of the porous roller can be obtained by dividing the total area of the grooves by the surface area of the roller (width of the roller x circumference of the roller surface). For example, if the size is a uniform circular shape as a groove, it can be obtained by (the area of the circle x the number) / (the surface area of the roller). If the shape is random, a developed view of the surface of the roller can be created, and the total area of the groove can be determined from the developed view.

The depth of the groove is preferably 1 mm or more and less than 15 mm, more preferably 2 mm or more and 13 mm or less, further preferably 3 mm or more and 10 mm or less, and most preferably 4 mm or more and 7 mm or less. The shape in the depth direction is not particularly limited. For example, if the shape of the surface is a circular shape, the shape in the depth direction is the same as the shape in the depth direction, and the shape in which the size becomes smaller with respect to the depth direction like a cone or a truncated cone . On the other hand, the depth of the groove refers to the distance from the porous roller surface to the deepest deepest part.

The porous roller used in the present invention has a plurality of such grooves. The arrangement of the grooves may be arbitrary or regular. In the present invention, it is preferable that the grooves are regularly arranged. For example, when viewed from the surface of the porous roller, large circles and small circles are alternately arranged, circles and triangles are alternately arranged, circles (A) (B) and the circle (C) are different from each other but the circles (A), the circles (B), and the circles (C) are regularly arranged are also examples of regularly arranged .

In the present invention, it is particularly preferable that grooves having a uniform size and / or shape are regularly arranged. These grooves are preferably arranged at regular intervals.

As shown in Fig. 2, the porous roller used in the present invention has a ratio of (b / a) of 1.1 times or more and less than 2 times (more preferably, 1.2 times or more and 1.9 Fold or less, more preferably 1.3 times or more and 1.8 times or less). Since they are regularly arranged at such intervals, there is no biased (biased) size of the shape along the groove, and it becomes easy to easily obtain a shape having a larger size and a larger size. In addition, the adjacent groove-to-groove distance (b) refers to the center-to-center distance of each groove shape.

A method of producing a porous layer having a plurality of grooves is not particularly limited, but a method may be employed in which a porous layer having a predetermined size and shape is melted by applying heat to a part of the porous layer, or cut with a cutter or a drill Or by shaping into a mold, or the like. The porous layer may be provided with a groove before the porous layer is provided on the cylindrical core, and the porous layer may be provided with a groove after the porous layer is provided on the cylindrical core. A porous roller having a plurality of such grooves may be mounted on the handle shaft and used.

The porous layer constituting the porous roller of the present invention has a plurality of &quot; pores &quot; in the layer surface / layer, and each of the pores has independent holes, (Communicating) hole type and the like (see Figs. 3 and 4).

As the porous roller used in the present invention, for example, a roller having a sponge-like porous layer is preferable. As the porous layer, a porous layer having a communicating hole or a porous layer having independent holes is not particularly limited. In the present invention, a porous layer having independent holes is preferable (see Figs. 3 and 4). As shown in Fig. 3, the porous layer roller having the independent holes is preferably a structure having an open hole on its surface and an independent hole in its interior. A coating material component is attached to the opening hole of the surface, It is prevented from being excessively entered and is easily transferred to a substrate. It is also excellent in strength and can be used for a long period of time without being protected or strengthened by a mesh net or the like. Also, the viscosity of the coating material can be broadly applied.

The size of the pores of such a porous layer is not particularly limited, but is preferably 2/3 or less (preferably 1/2 or less) of the groove size, more preferably 10mm or less, More preferably 0.5 mm or more and 8 mm or less, particularly preferably 1 mm or more and 5 mm or less, and most preferably 1.5 mm or more and 4 mm or less. The size of the hole may be calculated by the maximum distance x 2 from the center of each hole. The size of the hole can be obtained, for example, from a surface or an opening in a cut surface. The size of the hole is an average value obtained by calculating 10 holes.

The material of the porous layer is not particularly limited, and examples thereof include resins such as an acrylic resin, a urethane resin, an ester resin and an ethylene resin, and these are made into a sponge-like shape.

Further, with respect to the porous roller used in the present invention, fibrous rollers such as wool and synthetic fibers are not easily distorted, biased, or large in size, and easily deviate from the finish. Further, in the roller made of rubber or plastic (pattern roller), the three-dimensional pattern of the groove is prominent, and even a large-sized shape is seen. Even if a roller having a porous layer is not provided with grooves, it can not be sufficiently transferred, so that particles are distorted, biased, can not be obtained in a large size, and deviation easily occurs in the finish.

The thickness of the porous roller (porous layer) is preferably 1 mm or more and less than 15 mm, more preferably 2 mm or more and 13 mm or less, further preferably 3 mm or more and 9 mm or less, and most preferably 4 mm or more and 7 Mm or less. With such a thickness, coating efficiency of the coating material is good and workability is excellent. If the thickness of the roller is excessively large, the three-dimensional pattern becomes better, the large-sized shape does not show up, and the shape may appear to be biased. The thickness of the porous roller is a value obtained by measuring the thickness of the porous layer in the portion not having grooves in the cross section of the porous layer.

The width (length) of the porous roller is not particularly limited, but is preferably about 80 mm to 250 mm. The diameter (tubular diameter) (including the porous layer) of the porous roller is preferably about 15 mm or more and about 100 mm or less.

<Coating material>

The coating material used in the present invention is characterized by containing particles having a size of 0.2 cm or more (preferably 0.5 cm or more and 3 cm or less), and it is preferable that a coating having a size larger than 0.2 cm in size Material. The particle size refers to the maximum diameter when the particles are stably placed on a horizontal plane and observed from above. The maximum diameter referred to herein can be calculated by the maximum distance x 2 from the center of the shape. The particle size can be measured by an optical microscope or the like.

As the coating material, it is preferable to include a binder together with particles having a size of 0.2 cm or more. As the binder, for example, an acrylic resin, an acrylic silicone resin, a silicone resin, an epoxy resin, a urethane resin, a fluorine resin, an ethylene resin, a vinyl acetate resin, a polyester resin, an alkyd resin and a vinyl chloride resin may be used as a component for immobilizing the particles .

As the coating material, other additives such as pigments, curing agents, solvents, dispersing agents, viscosity adjusting agents, film forming auxiliaries, thickening agents, defoaming agents, leveling agents, anti- Additives such as plasticizers, preservatives, antifungal agents, antiseptics, antibacterial agents, wetting agents, drying regulators, dehydrating agents, quenching agents, cryoprotectants, ultraviolet absorbers, antioxidants and light stabilizers And it is not particularly limited such as an aqueous system or a solvent system.

The particles of 0.2 cm or more in size used in the present invention are not particularly limited, such as a gel state and a solid state, in a coating material, but form a granule having a size of 0.2 cm or more when coated on a substrate and obtain a large-sized shape. In addition, the coating material may include particles having a size of less than 0.2 cm.

When the particles are in a gel state in the coating material, it is preferable that the particles include a coloring material and a resin.

Examples of the colorant include titanium oxide, zinc oxide, yellow iron oxide, ocher, titanium yellow, carbon black, graphite, chrome green, cobalt green, ultramarine blue, cobalt blue, cobalt Violet, molybdenum red, red iron oxide, permanent red, brilliant carmine, lake red, anthraquinone red, perylene red, fast yellow, Yellow, isoindolinone yellow, quinophthalone yellow, phthalocyanine green, phthalocyanine blue, and quinacridone violet.

Examples of the resin include an acrylic resin, an acrylic silicone resin, a silicone resin, an epoxy resin, a urethane resin, a fluororesin, an ethylene resin, a vinyl acetate resin, a polyester resin, an alkyd resin and a vinyl chloride resin.

In the case where the particles are in a solid state in the coating material, examples of the particle components include natural stone powder, ceramic powder, ceramic powder, rubber granule, metal granule, silica, feldspar, silica, glass beads, and the like, and the surfaces of these may be colored. In addition, resin particles in a solid state in which the particle components in the gel state have been solidified in advance can also be used.

As the component of the particles, other additives may be included.

The mixing ratio of the binder and the particles in the coating material of the present invention is preferably 50 parts by weight or more and 3000 parts by weight or less (more preferably 100 parts by weight or more and 2000 parts by weight or less, )to be.

For example, when gel particles are used as the particles, the gel particles are preferably used in an amount of from 50 parts by weight to 500 parts by weight, more preferably from 100 parts by weight to 400 parts by weight based on 100 parts by weight of the solid content of the binder Or less.

When solid particles are used as the particles, preferably 100 parts by weight or more and 3,000 parts by weight or less, more preferably 300 parts by weight or more and 2,000 parts by weight or less, based on 100 parts by weight of the solid content of the binder, .

<Coating Method>

The coating method of the present invention can be used mainly for coating of buildings and civil engineering structures. Examples of applicable substrates include gypsum board, plywood, concrete, mortar, brick, magnetic tile, fiber-incorporated cement board, cement calcium silicate board, slag cement perlite board, , A siding plate, an extrusion-molded plate, a steel plate, and a plastic plate. The surface of these substrates may be any surface treated (for example, a sealer, a surfacer, a filler, a putty, or the like) Or the like.

The present invention is characterized in that it is applied to a substrate using a roller containing a coating material. In particular, the present invention is characterized in that a roller is transferred onto the substrate, and the coating material is transferred onto the substrate. By using the roller of the present invention, it is possible to uniformly transfer the particles successively even in a special coating material containing particles of 0.2 cm or more in size. Particularly, when a coating material containing gel particles as the particles is used, the gel particles can be transferred easily and with a small number of coatings without crushing them.

In the present invention, the coating amount when coating the coating material may be properly set, preferably about 0.2 to 5 kg / m 2, more preferably about 0.3 to 3 kg / m 2. For example, when gel particles are used as the particles, the coating amount is preferably about 0.2 to 1.2 kg / m 2, more preferably about 0.3 to 1 kg / m 2. When solid particles are used as the particles, the coating amount is preferably about 0.5 to 5 kg / m 2, and more preferably about 0.8 to 4 kg / m 2.

The viscosity of the coating material at the time of coating may be appropriately adjusted, and it is preferably adjusted to about 1 Pa · s or more and 50 Pa · s or less. The viscosity is a value measured when the rotational speed is 20 rpm with a BH type viscometer at a temperature of 23 캜 and a relative humidity of 50% RH.

The coating material may be cured (hardened) by a known method without any particular limitation, and examples thereof include a method of curing by applying heat, a method of curing without applying heat, a method of reacting curing by adding a catalyst or the like . In the method of curing by applying heat, it is preferable to cure at 40 ° C or higher and 200 ° C or lower, and more preferably 50 ° C or higher and 120 ° C or lower. In the method of curing without heating (room temperature curing), it is preferable to cure at 0 캜 or more and 40 캜 or less, and more preferably 5 캜 or more and 35 캜 or less.

[Example]

In order to clarify the effects of the present invention, examples and comparative examples will be described below.

As the coating material, coating materials (1 to 6) in which each particle was dispersed in an acrylic resin emulsion were prepared by the raw materials and blending shown in Table 1 below. On the other hand, all values in Table 1 indicate parts by weight.

Coating material One 2 3 4 5 6 Acrylic resin emulsion 1 200 200 200 200 200 200 Particle 1 100 Particle 2 100 100 Particle 3 100 100 Particle 4 100 100 Particle 5 100 100 Particle 6 100 Particle 7 100 Particle 8 100 Acrylic resin emulsion 1 Acrylic resin emulsion, solid content 50 wt% Particle 1 Acrylic resin emulsion (solid content 50% by weight),
Gelatinous particles containing titanium oxide (white pigment), particles having a particle size of 0.8 cm Particle 2 Acrylic resin emulsion (solid content 50% by weight),
Gelatinous particles containing black iron oxide (black pigment), particles having a particle size of 1.0 cm Particle 3 Acrylic resin emulsion (solid content 50% by weight),
Gelatinous particles containing titanium oxide (white pigment), particles having a particle size of 0.3 cm Particle 4 Acrylic resin emulsion (solid content 50% by weight),
Gel particles containing black iron oxide (black pigment), particles having a particle size of 0.7 cm Particle 5 Acrylic resin emulsion (solid content 50% by weight),
Gelatinous particles containing titanium oxide (white pigment), particles having a particle size of 1.2 cm Particle 6 Acrylic resin emulsion (solid content 50% by weight),
Gelatinous particles containing black iron oxide (black pigment), particles having a particle size of 1.5 cm Particle 7 Acrylic resin emulsion (solid content 50% by weight),
Gelatinous particles including titanium oxide (white pigment), particles having a particle size of 0.5 mm Particle 8 Acrylic resin emulsion (solid content 50% by weight),
Gel particles containing black iron oxide (black pigment), particles having a particle size of 0.2 mm

Next, rollers 1 to 29 shown in Table 2 were prepared as rollers. The rollers 1 to 26 have a width of 120 mm and a uniform size and shape of the grooves. The roller 27 is a porous roller having no groove. The roller 28 is a rubber-like pattern roller having no grooves or holes and having concavities and convexities on its surface. The roller 29 is a wool roller in the form of a fiber having no groove or hole and having a length (thickness) of 8 mm of the base material (bristle material).

Porous roller thickness
(mm) Size of hole
(mm) Shape of hole Shape of groove Size of groove
(mm) Depth of groove
(mm) The total number of homes
(dog) Total Area of Home
(%) material One Urethane resin 5 2 Surface open hole type
Independent hole Circle / Circle 10 5 198 79.3% 2 Urethane resin 5 2 Surface open hole type
Independent hole Circle / Circle 10 5 160 64.1% 3 Urethane resin 5 2 Surface open hole type
Independent hole Circle / Circle 10 5 96 38.5% 4 Urethane resin 5 2 Surface open hole type
Independent hole Circle / Circle 10 5 70 28.0% 5 Urethane resin 5 2 Surface open hole type
Independent hole Circle / Circle 10 5 60 24.0% 6 Urethane resin 5 4 Surface open hole type
Independent hole Circle / Circle 10 5 96 38.5% 7 Urethane resin 5 1.5 Surface open hole type
Independent hole Circle / Circle 10 5 96 38.5% 8 Urethane resin 5 2 Surface open hole type
Independent hole Circle / Circle 11 5 96 46.5% 9 Urethane resin 5 2 Surface open hole type
Independent hole Circle / Circle 13 5 96 65.0% 10 Urethane resin 5 2 Surface open hole type
Independent hole Circle / Circle 16 5 70 71.8% 11 Urethane resin 5 3 Surface open hole type
Independent hole Circle / Circle 9 5 96 31.2% 12 Urethane resin 5 3 Surface open hole type
Independent hole Circle / Circle 9 5 70 22.7% 13 Urethane resin 5 3 Surface open hole type
Independent hole Circle / Circle 9 5 48 15.6% 14 Urethane resin 5 2 Surface open hole type
Independent hole Circle / Circle 8 5 96 24.6% 15 Urethane resin 5 2 Surface open hole type
Independent hole Circle / Circle 6 5 96 13.8% 16 Urethane resin 4 2 Surface open hole type
Independent hole Circle / Circle 10 4 96 40.0% 17 Urethane resin 6 2 Surface open hole type
Independent hole Circle / Circle 10 6 112 43.2% 18 Urethane resin 8 2 Surface open hole type
Independent hole Circle / Circle 10 8 60 21.6% 19 Urethane resin 12 2 Surface open hole type
Independent hole Circle / Circle 10 12 144 45.5% 20 Urethane resin 15 2 Surface open hole type
Independent hole Circle / Circle 10 12 160 46.3% 21 Urethane resin 5 3 Surface open hole type
Independent hole Circle / Circle 10 2 70 28.0% 22 Urethane resin 5 3 Surface open hole type
Independent hole Circle / truncated cone 10 5 96 38.5% 23 Urethane resin 5 3 Surface open hole type
Independent hole Circle / Circle 10 5 70 28.0% 24 Ethylene resin 5 3 Surface open hole type
Independent hole Circle / Circle 10 5 96 38.5% 25 Urethane resin 5 2 Surface open hole type
Independent hole Square / square pillar 10 5 128 32.7% 26 Urethane resin 5 2 Surface open hole type
Independent hole Elliptical / elliptic pillars 10 5 128 34.2% 27 Urethane resin 5 2 Surface open hole type
Independent hole none - - - - 28 Rubbery
Pattern roller 5 - - - - 3 mm uneven - - 29 Wool roller 8 - - - - - - -

(Evaluation Experiment)

(Workability evaluation)

A 90 cm x 90 cm straight plate (substrate) was coated with an acrylic resin undercoating material (undercoating material) at a coating amount of 0.2 kg / m 2 and dried for 2 hours. Thereafter, the coating properties shown in Table 1 were evaluated by the combination of Table 3 with respect to the workability when the coating material was applied at a coating amount of 0.7 kg / m 2 by the rollers shown in Table 2. The evaluation was carried out in five stages of A to D and Z shown below. The results are shown in Table 3.

A: On the entire surface of the substrate, the coating material 0.7 kg / m 2 could be easily applied by coating within 2 round trips.

B: 0.7 kg / m 2 of coating material could be applied to the entire surface of the substrate by three reciprocating coatings.

C: The coating material of 0.7 kg / m 2 was coated on the entire surface of the substrate by four reciprocating coatings.

D: The coating material of 0.7 kg / m 2 was coated on the entire surface of the substrate by coating of 5 round trips or more and 9 round trips or less.

Z: Coating of 0.7 kg / m &lt; 2 &gt; could not be applied even when 10 reciprocating coatings were applied.

(Final evaluation)

In the workability evaluation, the test piece after coating with the coating material (0.7 kg / m 2) was dried for 24 hours, and the finish of the surface was visually evaluated. The evaluation was evaluated in the following six stages A to E and Z. The results are shown in Table 3.

A: It was able to confirm excellent design of large size across the front.

B: We could see excellent design with large size over almost the entire surface.

C: I could see some designs, but most of them were large in size.

D: Though some particles were distorted, most of them were large in size.

E: Some three-dimensional patterns were seen, but most of them were large-sized.

Z: I could not confirm the size of the chair.

Example One 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Coating material One One One One One One One One One One One One One One One One One roller One 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Workability evaluation C B A B C A A A B C B C D C D A A Completeness evaluation C B A B C A A A B C A C C C C A A Example Comparative Example 18 19 20 21 22 23 24 25 26 27 28 29 30 One 2 3 4 Coating material One One One One One One One One One 2 3 4 5 One One One 6 roller 18 19 20 21 22 23 24 25 26 8 8 8 8 27 28 29 3 Workability evaluation D C D C A C A B B A A A A Z Z Z A Completeness evaluation C E E D A D A A A A A A A Z Z Z Z

From the results of the evaluation in Table 3, it was confirmed that, in the examples, a design having a large size was confirmed by using a predetermined coating material by using a predetermined roller, and there was no practical problem in workability and completeness . On the other hand, in the comparative example, since a predetermined one was not used as the roller or the coating material, it could not be confirmed that both workability and completeness can be achieved.

X; The cavity
Y; hole
Y1; Opening hole (surface of porous layer)
Y2; Independent hole
Y3; Communication hole
a; Size of groove
b; Home
One; Core material
2; reinforcement
3; Handle shaft
4; The porous layer
5; handle

Claims (5)

As a coating method using a roller,
The roller is a porous roller,
Wherein the surface of the porous roller has a plurality of independent grooves,
Wherein the roller is used to apply a coating material containing particles having a size of 0.2 cm or more to a base material. The method according to claim 1,
Wherein the total area of the grooves on the surface of the porous roller is 20% or more and 80% or less of the entire roller surface. 3. The method according to claim 1 or 2,
Wherein the groove has a size of 0.3 cm or more and 3 cm or less. 4. The method according to any one of claims 1 to 3,
Wherein the grooves have a depth of less than 1 mm and less than 15 mm. 5. The method according to any one of claims 1 to 4,
Wherein the thickness of the porous roller is not less than 1 mm and less than 15 mm.

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