JP5334649B2 - Method for forming a design coating film - Google Patents

Description

  The present invention relates to a method of forming a designable coating film, and particularly to a method of forming a designable coating film using a magnetic paint.

  About the wall surface etc. of a building or a structure, the high grade is aimed at, and it replaces with what has a general flat external appearance, and has what has various design properties. Such design properties can be realized by making the surface of the coating film have an uneven structure.

  In recent years, there has been a demand for the formation of a coating film having a surface design that brings about a specific texture due to the further trend toward higher grades. As a method for forming such a design coating film, a magnetic coating film was formed using a magnetic paint containing magnetic particles, and a magnetic field was applied by a magnet to orient the magnetic particles. Proposals have been made to exhibit design properties based on optical characteristics such as light reflection by magnetic particles.

  For example, in Japanese Patent Application Laid-Open No. 63-175670 [Patent Document 1], a liquid coating film containing a powdered magnetic material is formed on the surface of an object to be coated, and while the coating film is in a fluid state, A method of forming a pattern coating film is disclosed in which a pattern is formed by applying a magnet to the magnetic material of the target portion of the coating film.

  Further, for example, in Japanese Patent Application Laid-Open No. 3-193162 [Patent Document 2], a coating film is formed by applying a coating containing magnetic powder on the surface of an object to be coated, and a dot pattern is formed on the back surface of the object to be coated. A method of forming a pattern coating film is disclosed in which a pattern corresponding to a scattered pattern appears on a coating film by arranging an assembly of magnet pieces arranged in a shape.

JP-A 63-175670 Japanese Patent Laid-Open No. 3-193162

  As described in Patent Documents 1 and 2, when the magnet is disposed on the back side of the coating film, that is, on the back side of the article (base material) on which the coating film is formed, the base material that can be used. There are limitations. For example, when the thickness of the base material is excessively large or the base material is made of a magnetic material, the strength of the magnetic field in the magnetic coating film is insufficient or substantially zero, and a pattern with high design properties is formed. Tends to be difficult.

  Patent Document 1 describes that a magnet is brought close to the magnetic coating film from the surface side of the magnetic coating film. However, Patent Document 1 exemplifies a permanent magnet, an electromagnet, or a superconducting magnet as a magnet to be used, but the specific shape and structure thereof are not particularly described. As described in Patent Document 2, the magnet of this Patent Document 1 is considered to be a general block shape such as a rod shape or a U-shape. Therefore, it is difficult to form a pattern coating film having a high design property.

  In recent years, it has been required to improve the design of a coating film formed on the surface of an object to be coated, particularly in exterior wall coating of a building or a structure. In this case, the object to be coated already exists in the field, and the method of disposing a magnet on the back side of the object cannot be actually implemented.

  Then, although it is possible to employ | adopt the method as described in patent document 1 from the surface side of a to-be-coated article, as mentioned above, based on description of patent document 1, a coating film with high design property is used. The specific method of forming cannot be easily conceived.

  An object of this invention is to provide the method of forming the coating film which has high designability by a simple process only by the operation | work from the surface side of a to-be-coated article.

According to the present invention, the object as described above is achieved.
A magnetic paint containing magnetic powder is applied to the surface of the object to form a magnetic coating film,
By arranging a magnetic field generation source above the magnetic coating film while the magnetic coating film is uncured, the magnetic powder particles in the magnetic coating film are oriented by the action of the magnetic field generated by the magnetic field generation source. And / or moved to form a design of the magnetic powder,
Removing the magnetic field source;
After that, a method for forming a design coating film, which cures the magnetic coating film,
The magnetic field generation source includes a magnet sheet piece, and the magnet sheet piece is disposed at a distance from the magnetic coating film by being held by a holding body, and the holding body holds the magnet sheet piece. A surface portion, and a contact portion that is brought into contact with the surface of the object to be coated so as to set an interval between the surface of the object to be coated and the magnet sheet piece.
A method for forming a design-based coating film,
Is provided.

  In one aspect of the present invention, the magnetic field generation source includes a plurality of magnet sheet pieces arranged separately from each other. In one aspect of the present invention, the magnet sheet piece is a double-sided magnetized sheet. In one aspect of the present invention, the contact portion of the holding body is brought into contact with the surface of the object to be coated in a dot shape or a line shape. In one aspect of the present invention, the holding body includes a reinforcing member attached to a side of the holding surface portion opposite to a side where the magnet sheet piece is held. In one aspect of the present invention, when the magnetic coating film is cured or after curing, a clear coating is applied onto the magnetic coating film to form a translucent coating film.

  According to the present invention, as a magnetic field generation source arranged on the surface side of the object to be coated, a magnetic sheet piece is used, and the magnet sheet piece is held by a holding body having a holding surface portion and a contact portion, Since the distance between the surface of the object to be coated and the magnet sheet piece is set, a magnetic field according to the shape of the magnet sheet piece can be efficiently applied to the magnetic coating film, and high designability can be achieved with a simple process. A coating film can be formed.

It is typical sectional drawing for description of the coating-film formation process in one Embodiment of the formation method of the designable coating film by this invention. It is a typical side view which shows collectively the magnetic field generation source used with the coating-film formation process of embodiment of FIG. 1, and the holding body holding it. It is a schematic diagram which shows the pattern of the designable coating film obtained by embodiment of FIG. It is a typical fragmentary sectional perspective view which shows the modification of a holding body. It is a schematic diagram for demonstrating the modification of the formation method of the designable coating film by this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic cross-sectional view for explaining a coating film forming step in an embodiment of a design coating film forming method according to the present invention. In FIG. 1, each process is drawn with a cross section, that is, a horizontal section. FIG. 2 is a schematic side view showing a magnetic field generation source used in the coating film forming step of the present embodiment and a holding body for holding the magnetic field generation source.

  First, as shown in FIG. 1A, a magnetic paint is applied to the surface of the article 2 to form a magnetic coating film 4. Although the to-be-coated object 2 is not specifically limited, For example, it is a building or a structure, and the to-be-coated object surface in which the magnetic coating film 4 is formed is the outer wall surface, for example. The outer wall surface is, for example, a concrete surface, a metal surface, a wood surface, or a sealer application surface, but is not limited thereto.

  The magnetic paint is a paint containing magnetic particles, for example, a solvent-type paint, but is not particularly limited as long as other magnetic particles can be dispersedly contained.

  The magnetic granular material includes, for example, stainless steel having high nickel and iron content, cobalt, chromium, iron, and iron oxide, and the magnetic coating is uncured (that is, has fluidity) in a magnetic field. It can be oriented and / or moved by action. The shape of the magnetic powder may be isotropic or anisotropic (for example, spherical or spheroid), or flat (flakes [including plate or scale)] It may be. From the viewpoint of being oriented or moved by the action of the magnetic field and being aligned along the magnetic field, the shape of the magnetic powder is flat, for example, from the viewpoint of creating a good three-dimensional effect and easily realizing high design. It is preferably flaky. As for the size of the magnetic particles, the maximum diameter (according to the average value of a large number of magnetic particles) is preferably smaller than the thickness of the magnetic coating film 4 and further the thickness of the cured magnetic coating film 4 'described later. This facilitates the orientation and movement of the magnetic particles in the uncured magnetic coating film 4. Moreover, when the maximum diameter of the magnetic granular material is too small, it tends to be difficult to achieve high designability. From the viewpoint of producing a good three-dimensional effect and easily realizing high designability, the maximum diameter of the magnetic powder is preferably 1 to 40 μm, and more preferably 2 to 25 μm. The magnetic granular material exhibits a function of visualizing the state of the magnetic field by being oriented and / or moved under the action of the magnetic field, and therefore has a visually noticeable gloss and color. It is preferable. For example, the magnetic powder particles may be provided with a coating for developing coloring or gloss.

  The magnetic coating material contains a vehicle component together with the magnetic particles as described above. The vehicle component can include those used in ordinary paints such as nitrified cotton resin, acrylic resin, fluororesin, epoxy resin and silicone resin. For example, the vehicle component includes an acrylic resin varnish, a nitrified cotton resin varnish, and a solvent. As the acrylic resin varnish, various acrylic resins used in normal room temperature drying paints and baking paints are preferably used. As the nitrified cotton resin varnish, various nitrified cotton resins and CAB resins that are used in ordinary room temperature dry paints are preferably used. Preferred examples of the solvent include a tree-like solvent, a water-soluble solvent, and tap water. That is, examples of the form of the magnetic coating used in the present invention include both water-based types and treeed solvent types.

  The magnetic paint can contain glass flakes, pearl pigments, mica, aluminum powder, color pigments and dyes as necessary. The magnetic paint may contain other commonly used additives, surface conditioners, extender pigments, and the like.

  The content of the magnetic granular material in the magnetic coating material, for example, the flaky magnetic material can be appropriately selected according to the intended appearance, but considering the balance with the other performance of the coating film, It is preferable to set it as 50 mass parts, especially 3-25 mass parts. Moreover, about content of the solvent in a magnetic coating material, after several minutes apply | coating so that it may become a dry film thickness of 8-50 micrometers on the surface of to-be-coated object, the non volatile matter of the said coating material may be 60-80 mass%, It is preferably one that can be dried or cured.

  Next, while the magnetic coating film 4 applied and formed as described above is in an uncured state, as shown in FIG. 1B, a magnetic field is applied from above the surface of the coating film (from above in FIG. 1). The source 6 is placed in close proximity.

  The magnetic field generation source 6 is composed of one or a plurality of magnet sheet pieces 6a, 6b, 6c arranged separately from each other. The magnet sheet piece is patterned into an appropriate shape. The magnet sheet piece is a double-sided magnetized sheet, and one surface of the sheet is an N pole and the other surface is an S pole. Therefore, in the vicinity of the edge of each of the magnet sheet pieces 6a, 6b, 6c, a magnetic field (indicated by a broken line in FIG. 1B) having a direction different from that of the vicinity of the central portion of the magnet sheet pieces 6a, 6b, 6c. Is born). In the present invention, the magnetic powder particles in the magnetic coating film 4 are moved and / or oriented by the action of the magnetic field generated by the magnet sheet pieces 6a, 6b, 6c, so that the direction of light reflection is the magnet sheet piece 6a. , 6b, and 6c, a high design property is expressed by utilizing the unique pattern shape corresponding to the pattern shape. The thickness of the magnet sheet pieces 6a, 6b, 6c is, for example, 0.5-8 mm, preferably 1-3 mm.

  The magnet sheet pieces 6 a, 6 b, 6 c are arranged at a required distance from the magnetic coating film 4 by being held by the holding body 8. The holding body 8 has a plate-like holding surface portion 81 that holds the magnet sheet pieces 6a, 6b, and 6c, and the object to be coated so as to set a distance between the surface of the object to be coated 2 and the magnet sheet pieces 6a, 6b, and 6c. And an abutment portion 82 abutted against the surface. The size of the holding surface portion 81 is, for example, 50 × 50 cm to 500 × 500 cm in consideration of operability, and the magnet sheet pieces 6a, 6b, and 6c are bonded to one surface (the lower surface in FIG. 1) by bonding or the like. I'm damned. The contact portion 82 is attached to the outer peripheral edge of the holding surface portion 81. The contact portion 82 protrudes from the outer peripheral edge of the holding surface portion 81 so as to be substantially orthogonal to the holding surface portion, and its height (T) is the thickness (t1) of the magnetic coating film 4 and the magnet sheet piece. It is the total (t1 + t2 + t3) of the thickness (t2) of 6a, 6b, 6c and the interval (distance) (t3) to be set between the magnetic coating film 4 and the magnet sheet pieces 6a, 6b, 6c. The distance (distance) (t3) to be set between the magnetic coating film 4 and the magnet sheet pieces 6a, 6b, 6c is the target appearance, that is, the design feature, for example, the emphasized contour of the pattern edge. Set appropriately according to whether it should be a clear design or a design with blurred outlines, according to the strength of the magnetic field generated by the magnetic field generation source 6, and according to the density of the pattern arrangement, etc. However, it can be, for example, 0.5 to 8 mm.

  The abutment portion 82 may be attached to the entire outer peripheral edge of the holding surface portion 81 in a frame shape. For example, the abutting portion 82 may be attached to the outer peripheral edge of the holding surface portion 81 in portions. May be. In this case, the abutting portion 82 is linearly abutted against the surface of the article 2 to be coated. Furthermore, the contact part 82 may be attached to the four corners or the like of the holding surface part 81 in a columnar shape or a needle shape. In this case, the contact portion 82 is brought into contact with the surface of the article 2 in a dot shape. The width dimension of the abutting portion 82 such as the diameter of the columnar abutting portion and the thickness of the frame-like abutting portion is determined by the flow of the coating film until the coating film is cured after the abutting portion 82 is removed in the process described later. It is preferable that the trace of the contact portion 82 is not left. From this viewpoint, a needle-like contact portion is preferable.

  By arranging the magnetic field generation source 6 as described above, a magnetic field passing through the magnetic coating film 4 is generated by the magnet sheet pieces 6a, 6b, 6c of the magnetic field generation source. This magnetic field acts on the magnetic powder particles in the magnetic coating film 4 to move and orient the magnetic powder particles. The magnetic field in the magnetic coating film 4 is directed substantially perpendicular to the magnetic coating film 4 in the vicinity of the center of the magnet sheet pieces 6a, 6b, 6c, and in the vicinity of the edge of the magnet sheet pieces 6a, 6b, 6c. The direction is oblique to 4. Thereby, in the magnetic coating film 4, the orientation distribution pattern of the magnetic granular material according to the shape of the magnet sheet pieces 6a, 6b, 6c is formed. The orientation distribution pattern of this magnetic granular material brings about a distribution pattern in the light reflection direction, that is, forms a design by the magnetic granular material, thereby creating a good three-dimensional effect and easily realizing high designability. Can do.

  The magnetic field generation source 6 is arranged for a time such that the effect of the magnetic field on the magnetic particles as described above can be sufficiently obtained. This time varies depending on the characteristics of the change in time of the fluidity of the magnetic coating film, the strength of the magnetic field formed, the distance (t3) between the magnetic coating film 4 and the magnet sheet pieces 6a, 6b, 6c, etc. 1 to 10 minutes. When t3 is as small as about 0.5 mm, drying of the magnetic coating film 4 may be promoted by blowing air.

  Next, the magnetic field generation source 6 is quickly removed. Thereby, the orientation distribution pattern of the magnetic granular material in the magnetic coating film 4 is maintained.

  Next, the magnetic coating film 4 is cured to form a cured magnetic coating film 4 'as shown in FIG. Curing of the magnetic coating film is performed in such a manner that after the trace (concave portion) due to the holding member abutting portion 82 in the magnetic coating film is filled with the flow and the surface is substantially flattened, the curing is completed. preferable. For curing, a known curing means can be applied, natural drying curing or accelerated curing such as heat curing may be used. Curing can be accelerated as appropriate according to the characteristics of the paint.

  On the cured magnetic coating film 4 ′ formed as described above, as shown in FIG. 1D, a light-transmitting coating film 10 is obtained by applying a light-transmitting coating material such as a clear coating material. May be formed. The translucent coating film may be partially patterned, or the patterned layer may be partially formed on and / or below the translucent coating film 10.

  FIG. 3 is a schematic diagram showing the design of the design coating film obtained as described above. The pattern is composed of pattern elements 12a, 12b and 12c formed corresponding to the magnet sheet pieces 6a, 6b and 6c. The pattern elements 12a, 12b, and 12c correspond to the central portions 12a1, 12b1, and 12c1 corresponding to the vicinity of the central portions of the magnet sheet pieces 6a, 6b, and 6c, and the vicinity of the edge portions of the magnetic sheet pieces 6a, 6b, and 6c, respectively. It consists of edge portions 12a2, 12b2, and 12c2. Since the edge portions 12a2, 12b2, and 12c2 have different light reflection directions compared to the central portions 12a1, 12b1, and 12c1, the light reflection is gradually performed from the outside of the pattern elements 12a, 12b, and 12c to the central portions 12a1, 12b1, and 12c1. Changes, thereby realizing a high design property that gives a good three-dimensional effect.

  FIG. 4 is a schematic partial cross-sectional perspective view showing a modified example of the holding body 8. The holding body 8 includes a reinforcing member 83 attached to the side (upper side) opposite to the side (lower side) where the magnet sheet pieces 6a and 6b of the holding surface portion 81 are held. The reinforcing member 83 can be a reinforcing rib as shown. In the drawing, the reinforcing ribs are linearly arranged in parallel to each other, but a lattice-like reinforcing rib extending in a direction orthogonal to the reinforcing ribs can also be used. By using the holding body 8 having the reinforcing member 83, the bending resistance of the holding body 8 is improved, and an increase in size of the holding body can be easily realized.

  In the above description, for the sake of simplicity, only one holding body 8 that holds the magnetic field generation source 6 is used. However, actually, the magnetic field generation sources 6 are held and held by the required number of holding bodies 8, respectively. The bodies 8 can be appropriately arranged in the vertical and horizontal directions in FIG. 2 so that a magnetic field acts on the magnetic coating film 4 over a large area.

  Alternatively, as shown in FIG. 5, one holding body 8 is sequentially arranged at (a), (b), (c) and (d), and further at other positions, and magnetic particles are used at each position. A design may be formed, and then the magnetic coating film may be cured at all required positions including (a) to (d). According to this, a designable coating film can be formed in a large area region by using only one holding body that is sufficiently smaller than the desired region.

  Hereinafter, the present invention will be described by way of examples.

[Example 1]
Nitrified cotton resin varnish 11.0 parts by weight Acrylic resin varnish 27.0 parts by weight Additive 2.0 parts by weight Solvent 50.0 parts by weight Flakes of magnetic substance 10.0 parts by weight are mixed and stirred with a disper. A magnetic paint was prepared. The magnetic paint was applied to the surface of the object 2 made of aluminum to a thickness of 0.02 to 0.04 mm by brushing to form a magnetic coating film 4.

  The magnetic field generation source 6 and the holding body 8 described above with reference to FIGS. 1 and 2 were prepared. The magnet sheet pieces 6a, 6b, 6c as the magnetic field generation source 6 had a circular shape with a thickness of 1 mm and radii of 10 mm (6a, 6b) and 20 mm (6c). The holding surface portion 81 of the aluminum holding body 8 has a square shape with a size of 10 × 10 cm, and the frame-like contact portion 82 of the holding body 8 has a height (T) of 2 mm and a width dimension (W) of 1 mm. there were.

  While the magnetic coating film 4 was in an uncured state, the magnetic field generation source 6 held by the holding body 8 was disposed on the surface of the article 2 to be coated. Thereby, the distance (t3) between the magnetic coating film 4 and the magnet sheet pieces 6a, 6b, and 6c was set to about 2 mm.

  After 1 minute, it is confirmed that the magnetic coating film 4 is formed with a pattern corresponding to the pattern of the magnet sheet pieces 6a, 6b, 6c based on the orientation and movement of the magnetic granular material. It was.

  Thereafter, the magnetic coating film 4 was cured by natural drying to obtain a cured magnetic coating film 4 '.

  The cured magnetic coating film 4 ′ formed as described above was formed with a pattern that creates a pattern-like three-dimensional effect corresponding to the pattern of the magnet sheet pieces 6 a, 6 b, 6 c.

[Example 2]
Nitrified cotton resin varnish 6.5 parts by weight Acrylic resin varnish 16.0 parts by weight Additive 1.5 parts by weight Solvent 26.0 parts by weight Flaked magnetic substance 5.0 parts by weight Injection gas 45.0 parts by weight A magnetic paint was prepared in the same manner as in Example 1 except for. The magnetic paint is of the aerosol type for spray coating, and the propellant gas is DME, which was added when sealed in a spray can.

  The magnetic paint was applied to the surface of the article 2 made of wood plywood by spray coating so as to have a thickness of 0.02 to 0.04 mm.

  Thereafter, in the same manner as in Example 1, the formation of the cured magnetic coating film 4 ′ was performed.

  The cured magnetic coating film 4 ′ formed as described above was formed with a pattern that creates a pattern-like three-dimensional effect corresponding to the pattern of the magnet sheet pieces 6 a, 6 b, 6 c.

[Example 3]
Acrylic resin varnish 16.0 parts by weight Additive 1.5 parts by weight Water-soluble solvent 20.0 parts by weight Tap water 6.0 parts by weight Scale-like magnetic substance 5.0 parts by weight Injection gas 45.0 parts by weight A magnetic paint was prepared in the same manner as in Example 1 except for. The magnetic paint is of the aerosol type for spray coating, and the propellant gas is DME, which was added when sealed in a spray can.

  The magnetic paint was applied to the surface of the article 2 made of wood plywood by spray coating so as to have a thickness of 0.02 to 0.04 mm.

  Thereafter, in the same manner as in Example 1, the formation of the cured magnetic coating film 4 ′ was performed.

  The cured magnetic coating film 4 ′ formed as described above was formed with a pattern that creates a pattern-like three-dimensional effect corresponding to the pattern of the magnet sheet pieces 6 a, 6 b, 6 c.

2 Coating object 4 Magnetic coating film 4 'Cured magnetic coating film 6 Magnetic field generation source 6a, 6b, 6c Magnet sheet piece 8 Holding body 81 Holding surface part 82 Abutting part 83 Reinforcement member 10 Pattern element 12a1, 12b1, 12c1 Center part 12a2, 12b2, 12c2 Edge part

Claims (7)

A magnetic paint containing magnetic powder is applied to the surface of the object to form a magnetic coating film,
By arranging a magnetic field generation source above the magnetic coating film while the magnetic coating film is uncured, the magnetic powder particles in the magnetic coating film are oriented by the action of the magnetic field generated by the magnetic field generation source. And / or moved to form a design of the magnetic powder,
Removing the magnetic field source;
After that, a method for forming a design coating film, which cures the magnetic coating film,
Wherein the magnetic field generation source consists of a magnet sheet piece, the magnet sheet piece is held by a holding member, the holding body includes a holding surface for holding the magnet sheet pieces, in contact with the surface of the object to be coated A contact portion that can be squeezed ,
When placing the magnetic field generation source above the magnetic coating film, by bringing the contact portion into contact with the surface of the object to be coated so that a trace is formed on the uncured magnetic coating film, Set the distance between the surface of the object to be coated and the magnet sheet piece, and arrange the magnet sheet piece at a distance from the uncured magnetic coating film,
When removing the magnetic field generation source, the contact portion is removed from the trace of the uncured magnetic coating film,
A method for forming a design-based coating film characterized by the above. 2. The curing of the magnetic coating film is completed after the traces of the uncured magnetic coating film are filled by flow when the magnetic coating film is cured. Method of forming a designable coating film. 3. The designable coating according to claim 1 , wherein the contact portion of the holding body is brought into contact with the surface of the object to be coated in a dot shape or a line shape. 4. Method for forming a film. The said magnetic field generation source consists of a several magnet sheet piece arrange | positioned separately from each other, The formation method of the designable coating film as described in any one of the Claims 1 thru | or 3 characterized by the above-mentioned. The method for forming a designable coating film according to any one of claims 1 to 4, wherein the magnet sheet piece is a double-sided magnetized sheet. The design according to any one of claims 1 to 5 , wherein the holding body has a reinforcing member attached to a side of the holding surface portion opposite to a side where the magnet sheet piece is held. For forming a conductive coating film. Wherein after the magnetic coating film was or cured during curing, said magnetic on the coated film by applying a clear coating and forming a light-transmitting coating, any one of claims 1 to 6 The forming method of the designable coating film as described in 2.

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