JP5313009B2 - Method for forming a coating film having a pattern with a three-dimensional appearance visually. - Google Patents

Description

  The present invention relates to a method for forming a coating film having a pattern with a three-dimensional appearance visually. More specifically, the present invention relates to a pattern having a pattern corresponding to a desired pattern or a pattern having a desired pattern missing. A magnetic sheet or magnet having a magnetic sheet, a non-magnetic sheet or a non-magnetic thin plate, and a transparent or translucent liquid paint containing a magnetic fluid, a resin, and a bright pigment, which is a mere liquid without magnetism when the magnetic field is zero. The present invention relates to a method of forming a coating film having a handle pattern having a three-dimensional appearance by visual use.

  As a method of forming a coating film having a pattern using a magnetic paint, after fixing a magnet on the back surface of a base film material cut to a certain size, a magnetic material-containing liquid paint is applied to the upper surface of the base film material. A method is known in which a magnet is removed from the base film material after being applied and then dry-cured (see, for example, Patent Documents 1 to 4).

JP-A-4-244268 JP-A-4-244269 JP-A-5-329436 JP-A-5-345165

  The present invention does not use a magnetic paint, but uses a transparent or translucent liquid paint containing a magnetic fluid, a resin, and a bright pigment, which is a simple liquid without magnetism when the magnetic field is zero. A method for forming a coating film having a pattern with a three-dimensional visual appearance, which is excellent in terms of properties, sharpness, etc., and also excellent in the productivity of a coating film having a three-dimensional appearance by visual observation The purpose is to do.

  As a result of intensive studies to achieve the above object, the present inventors have a pattern having a pattern corresponding to a desired pattern or a pattern having a pattern corresponding to a pattern from which the desired pattern is missing. Proper arrangement of sheet or magnet, non-magnetic sheet or non-magnetic thin plate, and transparent or translucent liquid paint containing ferrofluid, resin and luster pigment that is simply liquid without magnetism when the magnetic field is zero The present invention was completed by finding that a coating film having a pattern with a three-dimensional appearance by visual sense was significantly formed in terms of pattern pattern reproducibility, flexibility, sharpness and the like.

  That is, the method of forming a coating film having a pattern with a three-dimensional appearance according to the present invention has a pattern corresponding to a desired pattern or a pattern corresponding to a pattern from which the desired pattern is missing. A non-magnetic sheet or non-magnetic thin plate is placed on the magnet sheet or magnet, and a transparent or translucent liquid paint containing magnetic fluid, resin and bright pigment is dried on the surface of the non-magnetic sheet or non-magnetic thin plate. It is applied so that the film thickness is 8 to 50 μm, and using the property that the magnetic force of the magnetic fluid gathers along the magnetic field lines of the magnet, the resin and the bright pigment in the coating film are moved to visually handle the three-dimensional appearance. A pattern is formed, and the applied coating film is completely dried or cured.

  Further, the method for forming a coating film having a pattern with a three-dimensional appearance according to the present invention is a transparent or translucent liquid containing a magnetic fluid, a resin and a bright pigment on the surface of a nonmagnetic sheet or nonmagnetic sheet. The back surface of the nonmagnetic sheet or the nonmagnetic thin plate having the applied coating film while the coating film is applied to have a dry film thickness of 8 to 50 μm and the applied coating film has fluidity In addition, the magnetic force of the magnetic fluid gathers along the magnetic field lines of the magnet by applying a magnet sheet or magnet having a pattern corresponding to the desired pattern or having a pattern corresponding to the pattern from which the desired pattern is missing. Using the property, the resin and the bright pigment in the coating film are moved to form a pattern with a three-dimensional visual appearance, and the applied coating film is completely dried or cured.

  In the method for forming a coating film of the present invention, a coating film having a patterned pattern with a three-dimensional appearance can be formed, which is excellent in terms of pattern pattern reproducibility, flexibility, sharpness, and the like. This is also excellent in terms of productivity of a coating film having a pattern with a typical appearance.

2 is a photograph of a pattern obtained in Example 1. FIG. 3 is a photograph of a pattern obtained in Example 2. 4 is a photograph of a pattern obtained in Example 3. 6 is a photograph of a pattern obtained in Example 4.

  The magnetic fluid used in the present invention is well known, and magnetic ultrafine particles having a diameter of about 10 nm, a liquid (dispersion medium) such as water, an organic solvent or oil as a main component, and the particles adsorbed to the liquid ( It is a three-component colloidal solution with a surfactant for stable dispersion in a dispersion medium. In the present invention, a commercially available magnetic fluid can be used as it is. For example, EXP. 01052 is composed of 17.5 to 23.7% by volume of iron oxide, 17.3 to 23.5% by volume of a solvent-soluble dispersant, and 65.2 to 52.8% by volume of a synthetic hydrocarbon solvent. Due to the extremely small size of the magnetic particles in the magnetic fluid and the mutual repulsive force of the surface active agent layer, it is possible to maintain a stable dispersed state without agglomeration or sedimentation due to gravity. The magnetic fluid is a simple liquid without magnetism when the magnetic field is zero, but the magnetic fluid is magnetized by applying a magnetic field such as a magnet. However, when the magnet is moved away (the magnetic field is removed), the magnetization disappears again. Magnetic fluids do not have properties such as remanent magnetization and hysteresis. When the magnet is brought close to the magnet, it is attracted to the magnet, but at that time, it tends to be oriented along the magnetic field lines formed in the N-pole and S-pole of the magnet. This is called "spike phenomenon" because the surface of the ferrofluid changes to the shape of spikes (like spikes) as a result of antagonism between the force to be oriented and the interfacial tension of the ferrofluid. .

  In the method of forming a coating film having a pattern with a three-dimensional appearance according to the present invention, a magnet having a pattern corresponding to a desired pattern or having a pattern corresponding to a pattern from which the desired pattern is missing Use a sheet or magnet. A magnetic sheet having a pattern corresponding to a desired pattern or having a pattern corresponding to a pattern from which a desired pattern is missing is attached to a sheet containing magnetic particles in a pattern corresponding to the desired pattern. Magnetize (in this case, a magnetic pattern corresponding to the desired pattern) or magnetize with a pattern corresponding to the pattern from which the desired pattern is missing (in this case, the desired pattern) The corresponding non-magnetic pattern). In addition, this magnetization may be double-sided magnetization or multipolar magnetization. In the case of multipolar magnetization, a striped pattern is formed in the pattern in addition to the pattern. The

  Further, a magnet sheet having a pattern corresponding to a desired pattern or having a pattern corresponding to a pattern from which the desired pattern is missing is produced by extracting a portion corresponding to the desired pattern from the magnet sheet. be able to. In the present invention, the extracted magnet sheet (in this case, a magnetic pattern corresponding to the desired pattern) and the remaining magnet sheet (in this case, the non-pattern corresponding to the desired pattern) are obtained. Any of the magnetic pattern can be used as it is. However, when it is necessary to stably hold the nonmagnetic material sheet or the nonmagnetic material sheet to be placed thereon, a combination of the extracted magnetic sheet and the nonmagnetic sheet having the same shape as the remaining magnetic sheet is used. Sheet (in this case, a magnetic pattern corresponding to a desired pattern), or a combination of the extracted magnetic sheet and a nonmagnetic sheet having the same shape as the extracted magnetic sheet. (In this case, a non-magnetic pattern corresponding to a desired pattern can be used). In the method for forming a coating film having a pattern with a three-dimensional appearance according to the present invention, the magnet sheet may be either a double-sided magnetized sheet or a multipolar magnetized sheet. In the case of a multipolar magnetized sheet, A striped pattern is formed in the pattern.

  In the present invention, the sheet having a non-magnetic pattern is a sheet in which the pattern part is non-magnetic and the part other than the pattern is magnetic, or the pattern part is removed and other than the pattern pattern. It means that the portion is a magnetic sheet.

  A magnet having a pattern corresponding to a desired pattern or having a pattern corresponding to a pattern from which a desired pattern has been omitted is formed by forming the magnet into a shape corresponding to such a pattern, or It can be obtained by making a magnet with a patterned pattern. The magnet thus obtained can be used as it is. However, when it is necessary to stably hold the nonmagnetic material sheet or the nonmagnetic material sheet placed thereon, it can be processed in the same manner as in the case of the magnet sheet.

  The nonmagnetic material sheet or nonmagnetic material thin plate used in the present invention is a base film or thin plate made of a nonmagnetic material, and the material thereof is not limited. Specific examples of the material include polyvinyl chloride, polyester, polyethylene, nylon, polyurethane, polyimide, acrylic, styrene, ABS, phenol, epoxy, cellulose, rubber and the like. Although there is no restriction | limiting in particular about the thickness of a nonmagnetic material sheet or a nonmagnetic material thin plate, There exists a tendency for a habit pattern to be formed as it becomes thick.

  The non-magnetic material sheet and the non-magnetic material plate may be colored or transparent per se, or may have a smooth surface or an embossed surface. Further, in order to make the pattern to be displayed have a desired color tone, a colored primer containing a coloring pigment and a resin component as main components and containing no magnetic material is used on the surfaces of the nonmagnetic sheet and the nonmagnetic sheet. It is also possible to form an undercoat layer. Regarding the thickness of the non-magnetic material sheet and the non-magnetic material thin plate, the magnetic sheet of the lower surface of the non-magnetic material sheet and the non-magnetic material thin plate or the magnetic force of the magnet is applied to the surface of the non-magnetic material sheet and the non-magnetic material thin plate. The thickness is not particularly limited as long as it does not prevent the magnetic fluid from being affected. Depending on the use of the nonmagnetic sheet and the nonmagnetic thin plate on which a coating film having a pattern with a three-dimensional visual appearance is formed. Determined.

  The transparent or translucent liquid paint used in the present invention is a liquid composition comprising a magnetic fluid, a resin, a bright pigment and a solvent as main components and further blending a color pigment, a dye and the like as required. In addition, the liquid paint may appropriately contain additives, surface conditioners, extender pigments and the like that are commonly used in paints.

  As the resin component, ordinary coating resins can be used, for example, resins that are dried or reactively cured at room temperature, resins that are cured or melted by heating, resins that are cured by irradiation with active energy rays, and the like. Examples thereof include resins, polyester resins, acrylic resins, urethane resins, vinyl resins, amino resins, epoxy resins, phenol resins, silicon resins, fluorine resins, and modified resins thereof.

  If magnetic fluid is mixed directly with resin or thinner, shock may occur (do not mix or separate). However, when magnetic fluid and cellulose acetate butyrate are mixed, they are mixed neatly, and even if mixed with resin or thinner after that, they do not cause shock and can be uniformly dispersed. Therefore, it is preferable to use cellulose acetate butyrate in the present invention. In addition, when cellulose acetate acetate butyrate is used, a secondary effect that drying properties are improved is also obtained.

  The bright pigment used in the present invention is a magnetic material, and examples thereof include nonmagnetic metallic pigments such as aluminum flakes, pearl pigments, and glass flake pigments. The bright pigment itself is not affected by the action of the magnetic field, but in the present invention, the resin and the bright pigment in the coating film are moved by utilizing the property that the magnetic force of the magnetic fluid gathers along the magnetic field lines of the magnet, It is necessary to orient the glitter pigment (change its orientation) to form a pattern with a three-dimensional visual appearance. Therefore, the glitter pigment is preferably flaky powder particles, such as flakes and thin plates. But it ’s okay. The size of the luster pigment is not particularly limited from the viewpoint of achieving the object of the present invention, and can be arbitrarily selected in consideration of the appearance of the object and the limitation of the equipment. For example, the average diameter of the maximum diameter of the particles is generally about 1 to 40 μm, preferably about 2 to 25 μm in relation to the thickness of a coating film (dry film thickness) having a pattern with a three-dimensional appearance visually. .

  Moreover, an organic solvent and water are mentioned as a solvent. Examples of the liquid paint containing the luster pigment used in the present invention include an organic solvent type, a non-aqueous dispersion type, an aqueous solution type, and an emulsion type.

  In the liquid paint used in the present invention, the content of the magnetic fluid is 8 by dry film thickness of a transparent or translucent liquid paint containing a magnetic fluid, a resin and a bright pigment on the surface of a nonmagnetic sheet or nonmagnetic thin plate. Using the property that magnetic force of magnetic fluid gathers along the line of magnetic force of the magnetic fluid when it is applied to -50μm, the resin and bright pigment in the coating are moved to orient the bright pigment (change the orientation). The amount is not particularly limited as long as it can form a pattern having a three-dimensional appearance visually. The content of the resin is preferably 3 to 50 parts by mass, particularly 5 to 12 parts by mass per 100 parts by mass of the paint in consideration of the balance of the performance of the coating film. The content of the glitter pigment can be selected according to the target appearance, but considering the balance with other performances of the coating film, the glitter pigment is added in an amount of 1 to 50 parts by weight, particularly 5 to 25 parts by weight per 100 parts by weight of the paint. Preferably it is present in an amount. The amount of the solvent is adjusted so that the liquid paint can be easily applied to the surface of the nonmagnetic sheet or the nonmagnetic thin plate so that the dry film thickness is 8 to 50 μm.

  In the method of forming a coating film having a pattern having a three-dimensional appearance according to the present invention, the liquid paint is applied by using, for example, a spray coating machine, a knife coater, a gravure coater, a roller, or a screen printing machine. Can do.

  In the method of forming a coating film having a pattern having a three-dimensional appearance according to the present invention, the liquid paint is applied so as to have a dry film thickness of 8 to 50 μm, preferably 10 to 40 μm. When the dry film thickness is less than 8 μm, the movement of the resin and the bright pigment in the coating film and the orientation of the bright pigment (changes the direction) using the property that the magnetic force of the magnetic fluid gathers along the magnetic field lines of the magnet. There is a tendency for the reproducibility of the patterned pattern to be hindered. Moreover, when the dry film thickness exceeds 50 μm, the three-dimensional effect of the pattern tends to be inferior.

  An appropriate method for drying or curing the liquid paint can be selected according to the kind of the paint. For example, room temperature drying, reaction curing, curing by heating, melting by heating and subsequent cooling, curing by active energy ray irradiation can be used, and dryers and active energy ray irradiation are required for those that require heating. Some can be cured by an active energy ray irradiator.

  In the method for forming a coating film having a pattern having a three-dimensional appearance according to the present invention, the non-volatile content of the applied liquid paint after 60 minutes is 60 to 80% by mass, preferably 60 to 75% by mass. It is preferable that the pattern corresponding to the magnetic pattern is formed in the coating film of the liquid paint by drying or curing, and then the coating film is completely dried or cured. When the non-volatile content after 1 minute of application exceeds 80% by mass, the orientation (change in orientation) of the bright pigment is interrupted before the finish of orientation (change in orientation) of the bright pigment, and the pattern reproducibility is reduced. There is a tendency to be inferior. Moreover, when the non-volatile content after 1 minute of application | coating is less than 60 mass%, time until the orientation of a luster pigment is fixed becomes long, and productivity is inferior.

In the method for forming a coating film having a pattern with a three-dimensional appearance according to the present invention, the pattern having a pattern corresponding to a desired pattern or having a desired pattern is lost in consideration of the above-described matters. A non-magnetic sheet or non-magnetic thin plate is placed on a magnet sheet or magnet having a pattern corresponding to the pattern, and the surface of the non-magnetic sheet or non-magnetic thin plate contains a magnetic fluid, a resin and a bright pigment. Alternatively, translucent liquid paint is applied so that the dry film thickness is 8 to 50 μm, and the resin and glitter pigment in the coating film are moved by utilizing the property that the magnetic force of the magnetic fluid gathers along the magnetic field lines of the magnet. A pattern with a three-dimensional appearance visually is formed, or a transparent or translucent liquid paint containing a magnetic fluid, a resin and a bright pigment is formed on the surface of a non-magnetic sheet or non-magnetic thin plate with a dry film thickness of 8 ~ 50μm While the applied coating film has fluidity, a pattern corresponding to a desired pattern is formed on the back surface of the nonmagnetic sheet or nonmagnetic thin plate having the applied coating film. A magnetic sheet or magnet having a pattern corresponding to a pattern that has a pattern or a desired pattern is missing, and the magnetic force of the magnetic fluid gathers along the magnetic field lines of the magnet to take advantage of The resin and the bright pigment are moved to form a pattern with a visual three-dimensional appearance, and then the coated film is completely dried or cured to form a film with a pattern with a three-dimensional visual appearance. To do.

  If necessary, a clear film can be further provided on the surface of the nonmagnetic sheet or nonmagnetic thin plate having a pattern obtained by the method of forming a coating having a pattern having a three-dimensional appearance according to the present invention. The clear film can be formed, for example, by applying a clear paint or by laminating a clear film having an adhesive (including an adhesive). The clear film can contain a color pigment.

  The non-magnetic material sheet or the non-magnetic material thin plate having a pattern pattern with a three-dimensional appearance visually obtained by the method of forming a coating film having a pattern pattern with a three-dimensional appearance according to the present invention can be used as it is. However, for example, an adhesive layer or a magnetic sheet layer may be provided on the back surfaces of the nonmagnetic sheet and the nonmagnetic thin plate and attached to other products for use. This is more useful.

Example 1
A surface of a black ABS resin plate having a thickness of 3 mm was subjected to IPA wiping treatment, and then a 7 cm × 15 cm rectangular non-magnetic thin plate was cut from the ABS resin plate obtained by applying a conductive agent. Further, an isosceles triangular magnet sheet having an apex angle of 120 ° and a base length of 12 cm was cut from a 2 mm thick magnet sheet. Furthermore, urethane paint V-TOP HNV (Dainippon Paint Co., Ltd.) 23.0 parts by mass, cellulose acetate butyrate (CAB-381-20-10BA obtained from Eastman Chemical Japan Co., Ltd., number average molecular weight 70000) 1.5 parts by mass, magnetic fluid (EXP.01052 obtained from Ferrotec Co., Ltd., iron oxide 17.5 to 23.7% by volume, solvent-soluble dispersant 17.3 to 23.5% by volume, synthetic hydrocarbon A liquid paint comprising 1.5 parts by mass of a solvent (65.2 to 52.8% by volume), 1.2 parts by mass of a bright pigment (aluminum paste available from Toyo Aluminum Co., Ltd., 5640NS) and 1.7 parts by mass of xylol Was prepared.

The cut nonmagnetic thin plate was placed on the cut magnetic sheet, and the liquid paint was applied to the surface of the nonmagnetic thin plate. As a coating method, a metabell (cup: 70φ) was used, static voltage −60 kV, shaving air 2.0 kg / cm ² , bell rotation speed 30000 rpm, gun distance 20 cm, linear speed 50 m / min, conveyor speed 1.65 m / min, Rotary atomization type electrostatic coating was carried out at a discharge rate of 200 ml / min. Then it was allowed to air dry. The time until the pattern after application was developed was 2 seconds or less, and the film thickness after dry drying (dry film thickness) was 20 μm. The photograph from the direction perpendicular to the surface of the obtained product is as shown in FIG. 1 (a), and the photograph from the direction inclined about 15 degrees from the direction perpendicular is as shown in FIG. 1 (b). There is a photograph from a direction inclined about 30 degrees from a right angle direction as shown in FIG.

Examples 2, 3 and 4
The blending amount of cellulose acetate butyrate (CAB-381-20-10BA available from Eastman Chemical Japan Co., Ltd.) used in Example 1 is 1.7 parts by mass from 1.5 parts by mass (Example 2). A coating film having a pattern was formed in the same manner as in Example 1 except that the content was changed to 2.0 parts by mass (Example 3) and 2.4 parts by mass (Example 4). A photograph taken from a direction perpendicular to the surface of the product obtained in Example 2 is as shown in FIG. 2 (a), and a photograph taken from a direction inclined about 15 degrees from the perpendicular direction is shown in FIG. 2 (b). The photograph from the direction inclined about 30 degrees from the right angle direction was as shown in FIG. Further, a photograph taken from the direction perpendicular to the surface of the product obtained in Example 3 is as shown in FIG. 3A, and a photograph taken from a direction inclined about 15 degrees from the perpendicular direction is shown in FIG. As shown in b), a photograph taken from a direction tilted about 30 degrees from a right angle was as shown in FIG. Further, a photograph taken from a direction perpendicular to the surface of the product obtained in Example 4 is as shown in FIG. 4A, and a photograph taken from a direction inclined about 15 degrees from the perpendicular direction is shown in FIG. As shown in b), a photograph taken from a direction inclined by about 30 degrees from a right angle was as shown in FIG.

  As can be seen from the comparison of the photographs in FIGS. 1, 2, 3 and 4 (a), (b), and (c), the shading changes depending on the viewing angle and is formed. The pattern has a three-dimensional visual appearance.

Claims (5)

  A non-magnetic material sheet or a non-magnetic thin plate is placed on a magnet sheet or magnet having a pattern corresponding to a desired pattern or a pattern corresponding to a pattern from which a desired pattern is missing, and the non-magnetic material. Apply a transparent or translucent liquid paint containing magnetic fluid, resin and luster pigment to the surface of the sheet or non-magnetic thin plate so that the dry film thickness is 8 to 50 μm, and the magnetic force of the magnetic fluid is the magnetic field line of the magnet The resin and glitter pigment in the coating film are moved by utilizing the properties gathered along the surface to form a pattern with a three-dimensional appearance by visual observation, and the applied coating film is completely dried or cured. A method for forming a coating film having a pattern with a three-dimensional appearance visually.   A transparent or translucent liquid paint containing a magnetic fluid, a resin and a bright pigment is applied to the surface of a non-magnetic sheet or non-magnetic thin plate so as to have a dry film thickness of 8 to 50 μm. While having fluidity, the back surface of the non-magnetic material sheet or non-magnetic material thin plate having the coated film has a pattern corresponding to the desired pattern or the desired pattern has been lost. Applying a magnet sheet or magnet with a pattern corresponding to the pattern, and utilizing the property that the magnetic force of the magnetic fluid gathers along the magnetic field lines of the magnet, the resin and the bright pigment in the coating are moved to make a three-dimensional visual A method for forming a coating film having a pattern with a three-dimensional appearance visually, wherein a pattern pattern of appearance is formed, and the applied coating film is completely dried or cured.   The method for forming a coating film having a pattern with a three-dimensional appearance visually according to claim 1 or 2, wherein the bright pigment is a non-magnetic metallic pigment, a pearl pigment, or a glass flake pigment.   The method for forming a coating film having a pattern with a three-dimensional appearance visually according to claim 1, 2 or 3, wherein the liquid paint further contains cellulose acetate butyrate.   A visual three-dimensional object characterized by further applying a clear paint on a coating film having a pattern having a three-dimensional visual appearance obtained by the method according to any one of claims 1 to 4, and drying or curing the paint. A method for forming a coating film having a pattern with a typical appearance.