JP2015081782A - Coating color evaluation sample, and preparation method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating color evaluation sample that can be easily prepared even in the presence of a concave part, and a method for its preparation.SOLUTION: A coating color evaluation sample 10 has, on one face 12 of a resin base 11 formed of a transparent film in or on which a concave part 14 or a convex part is formed, coats 16 and 17 in a portion containing at least the concave part 14 or the convex part. The coats 16 and 17 may comprise a photo-luminescent coat 16 containing a photo-luminescent pigment 15 over one face of the resin base 11 and further a colored coat 17 stacked over the photo-luminescent coat 16. From the side reverse to the face 12 on which the coats 16 and 17 of the resin base 11 are formed, the coats 16 and 17 can be observed through the resin base 11.

Description

  The present invention relates to a paint color evaluation sample and a method for producing the same.

  For industrial products, the color of the appearance is important as representing the image of the product. One of the most popular paint colors is a metallic paint color that changes the appearance of the color depending on the viewing angle. The metallic paint color can be obtained by painting a paint containing a scaly aluminum pigment or a light interference pigment.

Patent Document 1 describes a method for creating a three-dimensional image sample in which a photosensitive plate material is photocured based on image data and is coated to impart design properties. According to this method, the product to be applied can be reproduced. However, in the process of developing an industrial product, a paint manufacturer may propose a plurality of coating colors as candidates for a coating color to be applied to a product manufacturer that is a customer. In this case, if a product model is created as in Patent Document 1, a wide variety of product models are created, which is expensive. In addition, the product model has a large weight and volume and may be difficult to carry.
In some cases, a two-dimensional sample board or a color card (for example, Patent Documents 2 and 3) is used instead of the model. In this case, the color appearance when applied to a three-dimensional product is an image. There are problems that are difficult to do.
In addition, a computer graphics (CG) image using product shape data may be used. The CG image is convenient because it can be transmitted and received as electronic data, but the color reproducibility depends on the device. When printing, a printer that uses normal CMYK (cyan, magenta, yellow, black) cannot express metallic paint color, and even if special ink is used, the structure and arrangement of the pigment in the coating film It is difficult to reproduce the color change due to the observation angle of the metallic paint color.

JP 2000-202917 A JP 2004-53260 A JP 2004-271467 A

However, great care must be taken when creating a sample requesting a customer for evaluation.
For example, 3 coats (3C) consisting of a coating with a colored base coating / coating with a metallic base coating / a coating with a clear coating, 2 coats (2C) consisting of a coating with a colored base coating / a coating with a clear coating, etc. In order to form a coating film having a multilayer structure, it takes time to prepare a sample.
When foreign matter adheres to the surface of the paint film, it is necessary to repaint after removing a part of the paint film containing foreign matter by water lab, and work to make the paint film thickness uniform after repainting is also necessary .
Also, when a scaly glitter pigment with a large particle size is used in the metallic base paint, if the film thickness of the clear paint laminated on the metallic base paint is thin, the glitter pigment in the metallic base paint In some cases, a part of the protrusion protrudes from the clear coating film, and in order to maintain and improve the finished appearance, it is necessary to apply another layer of clear coating, and so on.

  If the product model is a concave molded product with a recess on the surface, the paint will not enter the recess during painting, and the coating will drip before drying or become thick, resulting in an uneven coating thickness. , The finished appearance and design may be impaired.

  When creating a painted model with a molded product, it is necessary to create a dedicated mold, which requires man-hours and costs. Large volume and weight are inconvenient to handle and difficult to transport.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the sample for coating color evaluation which is easy to produce even if there exists a recessed part, and its preparation method.

  In order to solve the above-mentioned problem, the present invention has a coating film on at least a portion including the concave portion or the convex portion on one side of a resin base material made of a transparent resin film in which the concave portion or the convex portion is formed. A sample for coating color evaluation is provided.

  It is preferable that the coating film has a glittering coating film containing a glittering pigment on one surface of the resin substrate, and a colored coating film is further laminated on the glittering coating film.

  It is preferable that the coating film is formed on the convex surface side which is the back surface of the concave portion of the resin base material from the viewpoint of ease of painting work, finished appearance of the obtained coating film, and design properties.

  Further, the present invention is a method for preparing the paint color evaluation sample, comprising: heating a transparent resin film and forming a resin base having a concave or convex portion by vacuum forming; There is provided a method for preparing a paint color evaluation sample, characterized in that a coating film is formed at least on a portion including the concave portion or convex portion.

  According to the present invention, a transparent resin film replaces the clear coating film, and not only can the man-hour for clear coating be reduced, but also the resin film has hardness, so that a large particle diameter is present in the metallic base paint. Even when a bright pigment is used, the bright pigment particles do not protrude toward the concave portion when coated on the convex portion, and the finished appearance and design are not impaired.

It is a figure which shows an example of the sample for coating color evaluation of this invention, (a) is whole sectional drawing, (b) is the elements on larger scale of the A section of (a).

Hereinafter, based on a preferred embodiment, the present invention will be described with reference to the drawings.
In the paint color evaluation sample 10 in the illustrated example, the shape of the sample is constituted by the transparent resin base material 11. The coating color evaluation is enabled by forming the coating film of 1 layer or 2 layers or more on the single side | surface of this resin base material 11, and observing a coating film through a resin base material.

  The resin base material 11 consists of a transparent resin film in which a concave portion or a convex portion is formed. It is preferable that the shape of the resin base material 11 imitates the shape of the outer surface of the product. The shape of the product can have one or more concave or convex portions on the outer surface, such as a curved panel, tray, cup, housing, cover, and the like. The resin constituting the resin base material is preferably a thermoplastic resin because it can be easily molded by heating at a low cost. Although the dimension of a recessed part or a convex part is not specifically limited, For example, it is about several millimeters to several tens of centimeters.

  Examples of the thermoplastic resin used as the material for the resin substrate 11 include polyester resin, polyolefin resin, polyvinyl chloride resin, polycarbonate resin, acrylic resin, polystyrene resin, and ABS (acrylonitrile / butadiene / styrene copolymer) resin. . Polyester resins include polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN), or other glycol components and dicarboxylic acids. Examples include various modified polyesters obtained by copolymerizing acid components and the like. Examples of the polyolefin resin include polyethylene and polypropylene. From the viewpoint of transparency, polyester resin, polycarbonate resin, acrylic resin, and the like are preferable.

  For forming the resin base material 11, various sheet forming methods in which a resin film (including a resin sheet or a resin plate, regardless of the thickness) is preliminarily heated and softened to be in close contact with a forming die are suitable. is there. The resin film may be a single layer product made of one kind of resin or a multilayer product made of two or more kinds of resins. Although the thickness of a resin film is not specifically limited, For example, about 0.1 mm to about several mm is mentioned. Preferably, it is about 0.25 mm to 0.5 mm.

  As a method for molding a resin film, specifically, vacuum forming for forming a vacuum between the resin film and the mold, pressure forming for pressurizing a space opposite to the resin film mold, and a resin film Examples include press molding in which concave and convex molds are provided on both sides of the film, and blow molding in which pressure is applied between the two resin films with air.

  Among the above-described forming methods, vacuum forming is preferable because the production cost of the mold is low and the reproducibility of the surface state is good. The material constituting the vacuum forming mold includes wood, artificial wood, resin, metal, and the like, but wood, artificial wood, and gypsum are preferable for small-scale production for the purpose of prototypes and the like. In vacuum forming or pressure forming, since only one side of the resin film needs to be in contact with the mold, it is arbitrary which of the front and back surfaces is used as the die contact surface. For example, when creating a resin substrate having a recess, the surface (concave surface) of the recess may be used as a mold contact surface, and the back surface (convex surface) of the recess may be used as a mold contact surface.

The coating color evaluation sample 10 of the present embodiment forms a coating film on one surface (surface to be coated) of the resin substrate after molding and releasing the resin substrate having a concave portion or a convex portion as described above. Manufactured. Compared to the case where the resin base material on which the coating film is formed is formed into a sheet, since the coating film is not affected by deformation or temperature during molding, the concave portion, the convex portion, the boundary portion between these and the flat portion, etc. Deterioration of the coating film can be suppressed. In particular, when the coating film has a metallic coating film, non-uniform distribution of the glitter pigment due to deformation and expansion / contraction of the resin film during molding, peeling of the resin in the paint and the scaly glitter pigment, etc. Can be prevented.
Before forming the coating film on the resin substrate, it is preferable to inspect the foreign material so as not to adhere to the resin substrate. Since the coating film is formed on one side of the transparent resin base material on the observation side, the state of the coated surface of the resin base material may affect the finish of the coating film. For this reason, it is desirable that the surface to be coated is smooth and there is no adhesion of foreign matter.

  In the case where foreign matter adheres to the resin base material, it is preferable to remove the foreign matter by blowing air or washing with water. When the foreign matter is oil or fat, it may be cleaned using a cleaning liquid containing a surfactant or a cleaning liquid containing an organic solvent. When a cleaning liquid containing a non-volatile component is used, it is preferable to remove the cleaning liquid by rinsing with water after the cleaning, and to dry the cleaning liquid.

  The coating film provided on the resin base material 11 may be a single layer of only one layer or a multilayer of two or more layers. Because of its excellent design, the coating film 16 that is in close contact with the surface 12 of the resin substrate 11 is a coating film (hereinafter referred to as a glitter coating film) formed from a paint containing a glitter pigment 15 (hereinafter referred to as a glitter paint). Is preferred). On the glittering coating film 16 (on the side opposite to the resin base material 11), when another coating film 17 that may or may not contain a color pigment is provided, the glittering coating film 16 is protected. In addition, when the glittering coating does not cover the material, the design of the multilayer coating is improved by another coating containing a color pigment.

  The glitter pigment is a pigment whose color appearance changes depending on the observation angle. Specific examples of glitter pigments include flaky metal pigments such as aluminum, copper, nickel alloys, and stainless steel, flaky metal pigments whose surfaces are coated with metal oxides, and flaky metals that are chemically adsorbed with colored pigments on the surface. Pigments, scale-like aluminum pigments with an aluminum oxide layer formed by causing an oxidation-reduction reaction on the surface, plate-like iron oxide pigments in which aluminum is dissolved, glass flake pigments, glass flakes whose surfaces are coated with a metal or metal oxide Pigment, glass flake pigment with colored pigment chemisorbed on the surface, interference mica pigment coated with titanium dioxide on the surface, reduced mica pigment with reduced interference mica pigment, colored mica pigment chemisorbed with colored pigment on the surface, surface Mica pigment coated with iron oxide, graphite pigment coated with titanium dioxide on the surface, titanium dioxide on the surface Coated silica flakes, alumina flake pigments, plate iron oxide pigments, holographic pigments, synthetic mica pigments, cholesteric liquid crystal polymer pigments having a helical structure, and the like oxy bismuth pigments chloride.

  In addition, the glitter paint includes, as a pigment other than the glitter pigment, a general color pigment, for example, an inorganic pigment such as a transparent iron oxide pigment, a composite oxide pigment such as titanium yellow; an azo pigment, a quinacridone pigment , Diketopyrrolopyrrole pigments, perylene pigments, perinone pigments, benzimidazolone pigments, isoindoline pigments, isoindolinone pigments, metal chelate azo pigments, phthalocyanine pigments, anthraquinone pigments, dioxazine pigments It is preferable to include organic pigments such as selenium pigments and indigo pigments, and colored pigments such as carbon black and titanium oxide pigments.

  Further, the glitter paint can usually contain a resin component as a vehicle. Specifically, the resin component includes a base resin such as an acrylic resin, a polyester resin, an alkyd resin, and a urethane resin having a crosslinkable functional group such as a hydroxyl group, a melamine resin, a urea resin, a polyisocyanate compound (also a block body). And the like in combination with a crosslinking agent. The glitter paint can be prepared by blending a vehicle, a pigment, a solvent (such as an organic solvent or water), and appropriate additives as necessary, and uniformly dispersing the mixture.

  The coating film 17 provided on the glitter coating film 16 may or may not contain a glitter pigment, but conceals the back surface of the glitter coating film 16 so that the transparent resin substrate 11 side is the observation surface (design). The coating film containing a color pigment is preferable.

It is preferable to form the coating films 16 and 17 in the part containing a recessed part or a convex part at least. A coating film may be formed on the entire surface including the flat portion, or painting of the peripheral portion may be omitted.
In FIG. 1A, the resin base material 11 includes the concave portion 14, the surface 13 on the side including the inner surface of the concave portion 14 is the observation side, and the surface 12 including the convex surface on the back surface of the concave portion 14 is the coating film 16, 17. It becomes the surface to be painted.

  When two or more coating films are formed on one surface of the resin base material 11, the coating films are formed in the reverse order from normal because the coating film is observed from the resin base material 11 side. For example, when the order of application in a normal product is the order of an appropriate undercoat layer, a colored coating film, a glittering coating film, and a clear coating film, the glittering coating film is formed when the sample 10 for coating color evaluation is prepared. Is first applied and then a colored coating is applied. Since the resin base material also serves as a clear coating film, it is not necessary to apply a clear coating film.

It is not necessary to provide a coating film on the coating film 17 provided on the glitter coating film 16. However, when creating a model of a product in which a large number of coating films are laminated, the reproducibility of the coating color is expected. Therefore, the same number of colored coating films can be laminated. Further, a protective film may be provided on the coating film 17.
You may remove the periphery of the resin base material 11 by trimming etc. after forming a coating film or before forming a coating film.

  According to the paint color evaluation sample 10 of the present embodiment, even when the glitter coating film contains a glitter pigment having a large particle diameter, the particles of the glitter pigment 15 are resin-based as shown in FIG. The protrusion of the pigment particles is prevented without penetrating the material 11. For this reason, in the conventional manufacturing method, the water polishing and repainting steps that are performed when the pigment particles protrude from the coating film become unnecessary.

  Since the resin base material 11 consists of a transparent resin film, it is not necessary to laminate | stack a clear coating film on the surface of a coating film. For this reason, a lamination structure required for coating color evaluation can be obtained simply by applying a glittering paint on a resin substrate. Since a thin film can be used for the resin base material 11, it is easy to handle, lightweight, and easy to send and carry to customers. Since man-hours and materials can be reduced, the cost is low.

  When a concave portion is included on the observation side of the sample, painting is easy because the surface to be coated is a convex surface on the back surface of the concave portion. For this reason, it is particularly effective when evaluating the coating color of the coating film in the recess. If the observation side of the sample includes a convex portion, the surface to be coated becomes a concave surface on the back surface of the convex portion, but even if some paint sags, the interface between the surface to be coated of the resin substrate and the coating film Is observed. A bright coating film is required to have a relatively thick film that is larger than the particle size of the bright pigment, but even if foreign matter adheres to the back surface of the coating film or the paint drips, the coating color evaluation sample The effect on appearance is small.

  When a concave portion is included on the observation side of the sample, it is possible to observe by putting water in the concave portion. If water droplets or a water film are formed on the coating film, the coating color may change due to the difference between the refractive index of water (about 1.33) and the refractive index of air (about 1.0). When water is poured into the concave portion, it is difficult to spill water when observing from various directions, so that it is easy to evaluate the influence of water adhesion even in the room.

(Example 1)
A PET film having a thickness of 0.3 mm and a length and width of about 40 cm × about 30 cm was heated to form a recess of about 22 cm × 14 cm × (depth) of about 6 cm by vacuum forming. After mold release, a light green paint was applied to the convex surface on the back surface of the concave portion. After drying, a white paint was further applied and dried. Thereby, the sample for paint color evaluation was able to be created easily at low cost.

(Example 2)
A PET film having a thickness of 0.3 mm and a length and width of about 40 cm × about 30 cm was heated, and a substantially hemispherical recess having a diameter of about 20 cm and a depth of about 5 cm was formed by vacuum forming. After the mold release, a white paint containing a bright pigment was applied to the convex surface on the back surface of the concave portion. After drying, a white paint containing no bright pigment was further applied and dried. Thereby, the sample for paint color evaluation was able to be created easily at low cost.

DESCRIPTION OF SYMBOLS 10 ... Paint color evaluation sample, 11 ... Resin base material, 12 ... Single side | surface, 13 ... Opposite side surface, 14 ... Recessed part, 15 ... Bright pigment, 16 ... Bright paint film, 17 ... Paint film.

Claims (4)

  A sample for color evaluation, which has a coating film on at least a portion including the concave portion or the convex portion on one side of a resin substrate made of a transparent resin film having a concave portion or a convex portion.   2. The coating film according to claim 1, wherein the coating film has a glittering coating film containing a glittering pigment on one surface of the resin base material, and a colored coating film is further laminated on the glittering coating film. Sample for coating color evaluation described in 1.   The coating color evaluation sample according to claim 1, wherein the coating film is formed on a convex surface side that is a back surface of a concave portion of the resin base material. It is the preparation method of the sample for paint color evaluation of any one of Claims 1-3,
After forming a resin base material having a concave or convex portion by vacuum forming by heating a transparent resin film, a coating film is formed on at least a portion including the concave or convex portion on one side of the resin base material. A method for preparing a characteristic paint color evaluation sample.

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