Coating method

Abstract

To provide a coating method which can form a coating film of a multicolor coating material even in the inside of a groove.SOLUTION: A coating method coats a multicolor coating material onto the surface of an object to be coated using a porous roller. A plurality of grooves extending in one direction are formed on the surface. The moving direction of the porous roller and the one direction form an acute angle. For example, the width of the groove is 5 mm or more. For example, a plurality of grooves extending in other direction crossing the one direction are further formed on the surface of the object to be coated. The moving direction of the porous roller and the other direction form an acute angle.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a coating method. [Background technology]

[0002] A method for applying a multicolor paint to the surface of an object to be painted is disclosed in Patent Document 1. The multicolor paint is a paint containing gel particles and a dispersion liquid. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-13863 A Summary of the Invention [Problem to be solved by the invention]

[0004] There are cases where grooves are formed on the surface of an object to be coated. One method for coating a multicolored paint is to use a porous roller. When using a porous roller to coat a multicolored paint on the surface of an object to be coated that has grooves, it is difficult to form a coating film inside the grooves.

[0005] In one aspect of the present disclosure, it is preferable to provide a coating method that can form a coating film of multicolor paint even inside grooves. [Means for solving the problem]

[0006] One aspect of the present disclosure is a coating method for applying multicolor paint to a surface of an object using a porous roller, wherein a plurality of grooves extending along one direction are formed on the surface, and the direction of movement of the porous roller forms an acute angle with the one direction.

[0007] According to the coating method which is one aspect of the present disclosure, a coating film of multicolor paint can be formed even inside the grooves. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a plan view showing the configuration of a porous roller and a roller unit. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Diagram 3] FIG. 2 is a plan view showing the configuration of the object to be coated and the porous roller. [Figure 4] FIG. 2 is an explanatory diagram showing acute angles θ1 and θ2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Exemplary embodiments of the present disclosure will now be described with reference to the drawings. 1.Painting method (1) Basic composition of painting method In the coating method of the present disclosure, a porous roller 1 shown in FIGS. 1 and 2 is used to coat a multicolor paint on a surface 4 of an object 3 shown in FIG.

[0010] (2) Porous roller 1 As shown in Figs. 1 and 2, the porous roller 1 has, for example, a cylindrical shape. At least the outer peripheral portion of the porous roller 1 is made of a porous material. Examples of the porous material include polyurethane foam. A plurality of holes are opened on the outer peripheral surface of the porous roller 1. The diameter of the holes is preferably 1 mm or more and 15 mm or less. The plurality of holes has a function of retaining gel particles contained in the multicolor paint.

[0011] The diameter R of the porous roller 1 is preferably 25 mm or more and 70 mm or less. The length of the porous roller 1 in the axial direction DA is preferably 100 mm or more and 200 mm or less.

[0012] The porous roller 1 is, for example, a part of the roller unit 5 shown in FIG. 1. The roller unit 5 includes the porous roller 1, a shaft portion 7, and a handle 9. The shaft portion 7 is a linear member located on the central axis of the porous roller 1. The porous roller 1 is attached to the shaft portion 7. The porous roller 1 is rotatable relative to the shaft portion 7, with the shaft portion 7 serving as the center of rotation. The handle 9 is a member attached to the end portion of the shaft portion 7. An operator can hold the handle 9 in his or her hand.

[0013] When applying multicolor paint to the surface 4 using the roller unit 5, the multicolor paint is applied to the outer peripheral surface of the porous roller 1. The worker holds the handle 9 by hand and presses the outer peripheral surface of the porous roller 1 against the surface 4. The worker moves the porous roller 1 in the direction DR shown in FIG. 3. The direction DR is the direction in which the porous roller 1 moves. The direction DR is perpendicular to the axial direction DA of the porous roller 1 and parallel to the surface 4. At that time, the porous roller 1 rotates around the shaft 7 as the center of rotation while in contact with the surface 4.

[0014] (3) Object to be painted 3 Examples of the object 3 to be coated include concrete, mortar, ALC panel, siding board, concrete block, extrusion molded board, gypsum board, slate, ceramic, plastic, wood, stone, tile, etc. The object 3 to be coated is, for example, a member constituting the wall surface of a building.

[0015] As shown in Fig. 3, a plurality of grooves 11 extending along a first direction D1 are formed on the surface 4. The first direction D1 corresponds to one direction. The first direction D1 is parallel to the surface 4. The plurality of grooves 11 are, for example, parallel to each other. When viewed from a direction perpendicular to the surface 4, the shape of the grooves 11 is, for example, a straight line, a curved line, or a combination of a straight line and a curved line.

[0016] The width W1 of the groove 11 is, for example, 5 mm or more. The width W1 of the groove 11 is the width in a direction perpendicular to the first direction D1. The width of the groove 11 is the width at the opening of the groove 11. The depth of the groove 11 is, for example, 1 mm or more and 5 mm or less.

[0017] A plurality of grooves 12 extending along a second direction D2 are further formed on the surface 4, for example, as shown in FIG. 3. The second direction D2 is parallel to the surface 4. The second direction D2 corresponds to another direction. The second direction D2 intersects with the first direction D1. The second direction D2 is, for example, perpendicular to the first direction D1. When the object 3 to be coated is a siding board, the grooves 11, 12 are, for example, joints of the siding board.

[0018] The multiple grooves 12 are, for example, parallel to each other. When viewed from a direction perpendicular to the surface 4, the shape of the grooves 12 is, for example, a straight line, a curved line, or a combination of a straight line and a curved line. The width W2 of the grooves 12 is, for example, 5 mm or more. The width W2 of the grooves 12 is the width in a direction perpendicular to the second direction D2. The width of the grooves 12 is the width at the opening of the grooves 12. The depth of the grooves 12 is, for example, 1 mm or more and 5 mm or less.

[0019] When carrying out the painting method, the surface 4 can be, for example, a vertical surface, a horizontal surface, or neither of these. The basic shape of the surface 4 can be, for example, a flat surface, a curved surface, or a combination of flat and curved surfaces. For example, a primer can be applied to the surface 4 before applying the multicolor paint.

[0020] The undercoat paint is, for example, a paint whose main component is synthetic resin. The synthetic resin may be in the form of, for example, a synthetic resin emulsion. Examples of synthetic resin emulsions include acrylic, acrylic styrene, urethane, acrylic-urethane, acrylic silicone, silicone, epoxy, and vinyl synthetic resin emulsions. (4) Multicolored paint The multicolor paint contains gel particles and a dispersion liquid. The gel particles are dispersed in the dispersion liquid. The gel particles are, for example, water-based paint that has been turned into gel particles. The state of the gel particles is, for example, a soft state containing moisture. The gel particles, for example, retain the shape of particles.

[0021] The shape of the gel particles may be, for example, a sphere, an ellipse, a disk, a cylinder, a shape similar to any of these, or an irregular shape close to a circle. The gel particles dry in the coating film of the multicolor paint to become dry particles. The dry particles express a multicolored look.

[0022] The multicolor paint preferably contains two or more types of gel particles of different colors. In this case, the coating film of the multicolor paint has a clear multicolor pattern and a natural texture. The size of the gel particles is preferably 0.5 mm or more and 15 mm or less. When the size of the gel particles is 0.5 mm or more, the coating film of the multicolor paint has excellent design properties. When the size of the gel particles is 15 mm or less, the application of the multicolor paint is easy.

[0023] The gel particles can be produced, for example, from an aqueous paint. The aqueous paint is, for example, a paint mainly composed of a synthetic resin emulsion. The aqueous paint further contains, for example, a coloring component, an extender pigment, etc. Examples of the synthetic resin emulsion contained in the aqueous paint include acrylic, urethane, acrylic-urethane, acrylic silicone, silicone, fluorine, epoxy, ester, vinyl, and other synthetic resin emulsions.

[0024] Examples of coloring components contained in the water-based paint include pigments and dyes. Examples of pigments include inorganic pigments and organic pigments. Examples of dyes include inorganic dyes and organic dyes. Examples of coloring components include glitter pigments. Examples of glitter pigments include pearl pigments and aluminum powder.

[0025] Examples of coloring components contained in water-based paints include inorganic coloring components. Examples of inorganic coloring components include titanium dioxide, carbon black, iron oxide, lead chromate, cadmium yellow, cadmium red, etc. Examples of coloring components contained in water-based paints include organic coloring components.

[0026] Examples of extender pigments contained in the water-based paint include kaolin, barium sulfate, hydrated magnesium silicate, clay, talc, diatomaceous earth, calcium carbonate, etc. The water-based paint further contains additives such as viscosity adjusters, antifoaming agents, matting agents, preservatives, and antifungal agents.

[0027] For example, a gel can be produced by adding a gelling agent to a water-based paint and stirring the mixture. At this time, a gel is produced by the combination of the synthetic resin emulsion in the water-based paint and the gelling agent. Examples of gelling agents include those containing magnesium montmorillonite clay, hectorite, sodium pentachlorophenol, borate, tannic acid, titanium lactate, sodium alginate, calcium chloride, magnesium chloride, etc. as a main component, and surfactant-based gelling agents.

[0028] Next, the gel-like particle preparation liquid is added to the gel-like substance and stirred again to obtain gel-like particles. After stirring again, the gel-like particles are dispersed in the gel-like particle preparation liquid. The gel-like particle preparation liquid is water or a liquid obtained by adding a gelling agent to water.

[0029] The dispersion liquid contained in the multicolor paint has a function of uniformly dispersing the gel particles. The dispersion liquid is, for example, water. The dispersion liquid contains, for example, a synthetic resin as a binder component. The synthetic resin is preferably in the form of a synthetic resin emulsion.

[0030] When the dispersion contains a synthetic resin, the workability when applying the multicolor paint is improved. Furthermore, when the dispersion contains a synthetic resin, the coating film of the multicolor paint can be made thicker. The synthetic resin emulsion contained in the dispersion is, for example, the same as that used in the preparation of gel particles. It is preferable that the synthetic resin emulsion contained in the dispersion does not gel even when the gelling agent used in the preparation of the gel particles is added.

[0031] For example, the viscosity of the dispersion can be adjusted by adding a viscosity adjuster to the dispersion. For example, a coloring pigment or a luster pigment can be added to the dispersion. For example, additives such as a defoamer, a matting agent, a preservative, and a fungicide can be added to the dispersion.

[0032] The viscosity of the dispersion is preferably 2000 mPa·s or more and 6000 mPa·s or less. When the viscosity of the dispersion is 2000 mPa·s or more, the multi-colored paint is less likely to flow when applied to the surface 4, and the coating film of the multi-colored paint can be made thicker.

[0033] When the viscosity of the dispersion is 6000 mPa·s or less, the coating film of the multicolor paint is less likely to crack. Also, when the viscosity of the dispersion is 6000 mPa·s or less, less stirring force is required when mixing the dispersion and gel particles with a stirrer. As a result, damage to the gel particles can be suppressed when mixing the dispersion and gel particles with a stirrer.

[0034] In the multicolor paint, the mass ratio of the gel particles to the dispersion liquid is preferably in the range of 1:0.5 to 3.0. When the mass ratio is within this range, the coating film of the multicolor paint has excellent design properties. (5) Moving direction DR of the porous roller 1 When the porous roller 1 is used to apply multi-colored paint to the surface 4, the axial direction DA of the porous roller 1 is parallel to the surface 4. In addition, when the porous roller 1 is used to apply multi-colored paint to the surface 4, the outer circumferential surface of the porous roller 1 is in contact with the surface 4.

[0035] When applying multicolor paint to a surface 4 using a porous roller 1, the porous roller 1 is moved in a direction DR as shown in Fig. 3. When the porous roller 1 is moved in the direction DR, the porous roller 1 rotates around the central axis of the porous roller 1 while in contact with the surface 4. At this time, the multicolor paint adhering to the outer circumferential surface of the porous roller 1 is adhered to the surface 4.

[0036] 4, the direction DR and the first direction D1 form an acute angle θ1. The acute angle θ1 is preferably 10° or more and 80° or less, more preferably 20° or more and 70° or less, and particularly preferably 30° or more and 60° or less.

[0037] When a groove 12 is formed on the surface 4, for example, the direction DR and the second direction D2 form an acute angle θ2 as shown in Fig. 4. The acute angle θ2 is preferably 10° or more and 80° or less, more preferably 20° or more and 70° or less, and particularly preferably 30° or more and 60° or less.

[0038] When the porous roller 1 is used to apply a multicolor paint to a surface 4, the trajectory of the movement of the porous roller 1 is, for example, a straight line, a curved line, or a combination of straight lines and curved lines. 2. Effects of painting method (1A) According to the coating method of the present disclosure, a coating film of multicolor paint can be formed even inside the grooves 11. The reason is presumed to be as follows. The direction DR and the first direction D1 form an acute angle θ1. Therefore, when the porous roller 1 passes over the grooves 11, only a part of the porous roller 1 in the axial direction DA overlaps with the grooves 11. Since the porous roller 1 is pressed toward the surface 4, when the porous roller 1 passes over the grooves 11, the part of the porous roller 1 that does not overlap with the grooves 11 is elastically deformed and compressed. On the other hand, the part of the porous roller 1 that overlaps with the grooves 11 (i.e., a part in the axial direction DA) penetrates into the grooves 11 without being compressed. As a result, a coating film containing gel particles is formed even inside the grooves 11.

[0039] (1B) The width W1 of the groove 11 is preferably 5 mm or more. In this case, a part of the porous roller 1 can more easily enter the inside of the groove 11. As a result, a coating film of the multicolored paint can be more reliably formed inside the groove 11.

[0040] (1C) For example, a plurality of grooves 12 extending along the second direction D2 are further formed on the surface 4. For example, the direction DR and the second direction D2 form an acute angle θ2. In this case, a coating film of multicolor paint can be formed inside the grooves 12 as well.

[0041] (1D) The width W2 of the groove 12 is preferably 5 mm or more. In this case, a part of the porous roller 1 in the axial direction DA can more easily enter the inside of the groove 12. As a result, a coating film of the multicolored paint can be more reliably formed inside the groove 12. 3. Working Example (3-1) Example 1 (i) Implementation of the painting method The object 3 to be coated shown in FIG. 3 was prepared. This object 3 to be coated was a siding board (KMEW Neolock Hydrophilic 16 New Ridge Wave). The object 3 to be coated had grooves 11 and 12 on its surface 4. The width W1 of the groove 11 and the width W2 of the groove 12 were each 5 mm. The depth of the groove 11 and the depth of the groove 12 were each 3 mm. The direction D1 and the direction D2 were perpendicular to each other.

[0042] A roller unit 5 shown in FIG. 1 was prepared. The porous roller 1 was a fine-cut sand bone small roller manufactured by Otsuka Brush Manufacturing. The material of the porous roller 1 was polyurethane foam. The size of the holes in the porous roller 1 was 5 to 7 mm. The diameter R of the porous roller 1 was 40 mm. The length of the porous roller 1 in the axial direction DA was 150 mm.

[0043] Vilgrande (product name) manufactured by Kikusui Chemical Industry Co., Ltd. was prepared as the multicolor paint. The gel particles were made by adding sodium alginate to a water-based paint containing an acrylic silicone resin emulsion to form a gel. The size of the gel particles was 1.0 to 8.0 mm. The mass ratio of the gel particles to the dispersion liquid was 1:2. The dispersion liquid was a solution containing an acrylic silicone resin emulsion. The viscosity of the multicolor paint was 70,000 mPa·s. A BH type viscometer was used to measure the viscosity. The temperature when the viscosity was measured was 23°C.

[0044] The multicolored paint was applied to the surface 4 using a porous roller 1. The acute angles θ1 and θ2 were each 45°. The amount of multicolored paint applied was 0.5 to 0.8 kg / m 2 It was. (ii) Evaluation of painting methods After carrying out the painting method, the paint film was visually observed. In Example 1, the multicolor paint was able to be spread over the entire surface 4. Also, a paint film of the multicolor paint was able to be formed inside the grooves 11 and 12.

[0045] (3-2) Example 2 The coating method was basically the same as in Example 1. However, the coating method was carried out by changing the width and depth of the grooves 11, 12 in various ways. Even when the width of the grooves 11, 12 was changed within a range of 4 to 5 mm, the same effect as in Example 1 could be obtained. Also, even when the depth of the grooves 11, 12 was changed within a range of 2 to 4 mm, the same effect as in Example 1 could be obtained.

[0046] When the width of grooves 11, 12 was 7 mm or more, the same effect as in Example 1 could be achieved regardless of the depth of grooves 11, 12. When the width of grooves 11, 12 was less than 7 mm, an even better effect could be achieved if the depth of grooves 11, 12 was less than 1 mm.

[0047] (3-3) Comparative Example 1 The coating method was basically the same as in Example 1. However, the angle between the direction DR and the direction D1 was set to 90°. In Comparative Example 1, the paint could not be spread. In addition, the paint was prone to dripping.

[0048] (3-4) Comparative Example 2 The coating method was basically the same as in Example 1. However, the angle between the direction DR and the direction D1 was set to 0°. In Comparative Example 2, a coating film of multicolored paint could not be formed inside the grooves 11 and 12.

[0049] 4. Other embodiments Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments and can be implemented in various modified forms.

[0050] (1) The function of one component in each of the above embodiments may be shared by multiple components, or the functions of multiple components may be performed by one component. Also, part of the configuration of each of the above embodiments may be omitted. Also, at least part of the configuration of each of the above embodiments may be added to or substituted for the configuration of another of the above embodiments.

[0051] (2) In addition to the above-described coating method, the present disclosure can be realized in various forms, such as a method for manufacturing a coated article. [Explanation of symbols]

[0052] 1...porous roller, 3...workpiece, 4...surface, 5...roller unit, 7...shaft, 9...handle, 11, 12...groove

Claims

1. A coating method for coating a multicolored paint on a surface of a coating object using a porous roller, comprising the steps of: A plurality of grooves extending along one direction are formed on the surface, The moving direction of the porous roller and the one direction form an acute angle. Painting method.

2. The coating method according to claim 1, The width of the groove is 5 mm or more. Painting method.

3. The coating method according to claim 1, A plurality of grooves are further formed on the surface, the grooves extending along another direction intersecting the one direction; The moving direction of the porous roller and the other direction form an acute angle. Painting method.

4. The coating method according to claim 3, The width of the groove extending along the one direction and the width of the groove extending along the other direction are each 5 mm or more. Painting method.

5. The coating method according to any one of claims 1 to 4, The substrate is a siding board. Painting method.

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