JP4978903B2 - Resin molded product and surface treatment method thereof - Google Patents

Description

  The present invention relates to a resin molded product in which a pattern formed on the surface appears to float and a surface treatment method for a resin molded product to form a three-dimensional pattern on the resin surface.

  In cosmetic containers and the like, in order to decorate the appearance, metallic decoration or the like in which metallic decoration is three-dimensionally applied using a hot stamp method has been performed.

  In some cases, characters and designs were raised on the surface by printing, and the container was finished with a high-class appearance.

Japanese Patent Application Laid-Open No. 6-286397

  However, when irregularities are formed on the surface of the container, there is a problem that costs are required, for example, the mold needs to be processed. Also, it took time and effort to hot stamp.

  On the other hand, a container with a three-dimensional effect formed by printing or the like can be manufactured at a low cost because the surface does not have unevenness, but it tends to be a flat plate and has a sufficient three-dimensional effect by printing or the like without providing unevenness on the surface. It was very difficult to form and bring a luxurious appearance to the resin container.

  The present invention provides a three-dimensional pattern formed on the surface by a simple method such as painting or vapor deposition, and has a high-quality resin molded product, and a surface treatment method for forming a high-class three-dimensional pattern on the resin surface. For the purpose.

  In order to solve the above-mentioned problems, the present invention has constituted a resin molded product and a surface treatment method thereof as follows.

That is, the resin molded product is formed on a base material made of a transparent resin, on the back surface of the base material, on an opaque coating film provided at a location other than the location that becomes the design portion, and on the back surface of the base material and the location that becomes the design portion. or a transparent resin material provided at a position over the surface of the箇plants and coating film comprising a rear surface in and design portion of the substrate, over the surface of the transparent resin material or the coating surface and the surface of the transparent resin material of the film, It was composed of laminated semi-reflective films.

  The base material is a transparent resin molded product constituting a resin product such as a container body or a container lid. The substrate only needs to transmit light to the front and back, and may be colored. The thickness of the substrate is not particularly limited. In addition, the thickness may be different from the uniform thickness. Furthermore, the base material is not limited to a flat plate shape, and may be formed into a desired shape such as a curved shape.

  The opaque coating is formed by applying a colored paint to the back surface of the substrate. The color of the paint is not limited, but is preferably a dark paint such as black. The pattern portion is formed by not providing a coating film on the substrate. For example, after the coating material is applied to the entire back surface of the substrate, a laser beam for removing the coating film is irradiated in accordance with the pattern portion, and the irradiated portion of the coating film is removed and formed. In addition, the paint may be applied to a portion other than the portion that becomes the symbol portion by printing, and the symbol portion may be formed at a portion that is not applied. When the pattern portion is formed by printing, it is performed by silk printing or the like. In the formed pattern portion, the transparency of the base material is left as it is. In addition, the substrate of the design portion has a smooth surface.

  In addition, you may form a pattern part by affixing the thin film member which has a cutout part in the shape of a pattern part on the back surface of a base material.

  The transparent resin material is made of transparent ink or transparent resin, and is provided so as to fill a portion where a coating film is not provided, that is, a design portion. The surface of the transparent resin material, that is, the back surface side of the substrate is formed to the same thickness as the coating film, and the surface of the transparent resin material is formed flat. In addition, you may apply | coat so that the thickness of a transparent resin material may be made thinner than the thickness of a coating film, or a transparent resin material may be thickened and a coating-film part may be buried. Furthermore, the transparent resin material may be continuously provided on the respective surfaces of the coating film and the base material with a substantially uniform thickness in a wide range including the pattern portion by silk printing or the like.

  If the transparent resin material is transparent, it may be colored similarly to the base material. Moreover, you may mix an additive in the inside of a transparent resin material. The additive is a lame material having a high light reflectivity or a particulate member of a predetermined color. The particulate member is not limited to a spherical powder, but may be formed in a predetermined shape such as a needle shape, a flake shape, or a star shape. Further, the additive may be mixed uniformly in the transparent resin material, or the specific gravity may be changed to concentrate upward or to precipitate downward. Moreover, there is no light reflectivity and it may be given to a predetermined color or consist of a plurality of colors.

  The material of the transparent resin material is preferably a material having a refractive index different from that of the base material. That is, by changing the material, a part of the light is reflected at the boundary surface between the transparent resin material and the substrate, and the incident light (including the reflected light) is refracted at the boundary surface.

  The semi-reflective film is a film body having a semi-reflective surface on the surface, that is, the transparent resin material side. The semi-reflective film is a member called a so-called half mirror, and has a property of partially reflecting light incident from the reflecting surface side and transmitting the other light to the back surface side. The semi-reflective film is formed by evaporating a metal component on the resin film surface, for example. In that case, metal vapor deposition is not performed until a complete reflective surface is formed on the resin film surface, and a semi-reflective film is formed by performing half vapor deposition on the surface of the resin film until halfway. The reflectance (also the transmittance) of the semi-reflective film is set as appropriate. For example, the reflectance is arbitrarily set based on the color or brightness of the base material or the opaque coating film. The reflectance of the semi-reflective film is set so that light is reflected at least on the reflective surface side of the semi-reflective film and the light can be seen through the semi-reflective film on the back surface side. The back surface of the semi-reflective film, that is, the back side of the resin molded product may be given a predetermined color as long as it is light transmissive.

  The semi-reflective film may be formed on at least the design portion on the back surface of the base material, and may be directly formed on the back surface of the base material without the transparent resin material in the design portion. Moreover, a semi-reflective film may be formed on the entire back surface of the base material, or the semi-reflective film may be formed in a predetermined shape after covering the pattern portion. Further, semi-reflection and total reflection may be appropriately combined. In that case, a semi-reflective part and a total reflective part are newly formed in the symbol part.

  The semi-reflective film may be formed by coating, or may be formed by attaching a film material that is a thin film and has a surface formed on a semi-reflective surface. As a method for attaching the semi-reflective thin film, for example, there is a hot stamp. A semi-reflective film is pasted on a base material in a wide range including a pattern portion from a transfer foil by a hot stamp method.

  Furthermore, a semi-reflective film may be formed on the back surface of the base material by attaching or combining a resin member having a semi-reflective surface on the front surface to the back surface of the base material.

  A color is provided on the reflective surface of the semi-reflective film, or a color is applied to a film body or resin member (a base material of the semi-reflective film) having the reflective surface, and a predetermined surface is formed on the back side of the resin molded product. A color may be formed on the symbol portion.

  The resin product according to the present invention is not limited to a container or the like, and can be applied to other resin products such as figurines, or parts such as dials, switches, and knobs.

  Furthermore, the resin molded product formed by the above method may be used by being stuck on or embedded in the surface of the product. Moreover, you may mix the additive which has light reflectivity etc. in a base material and a coating film similarly to a transparent resin material.

  In the resin molded product of the present invention, the design portion, that is, the portion of the transparent resin material, appears to emerge from the back surface of the substrate. In other words, the pattern part is reflected in the coating film and becomes noticeable, and further causes an optical illusion due to the difference in refractive index between the base material and the transparent resin material, resulting in a semi-reflection on the surface of the transparent resin material provided on the back surface of the base material. The reflective film reflects light and the semi-reflective film appears to be above the back surface of the substrate rather than being below the substrate.

  In addition, when the pattern part is glossy, especially when the paint film is formed in black or dark colors, it may appear to float on the paint film, and the transparent resin material may appear to have an opaque paint color. Moreover, it can bring a high-class feeling to the container.

  In addition, when the resin molded product is a member that can be seen on the back side when opened, such as a container lid, a three-dimensional pattern is formed on the surface of the lid, and the lid is opened. In addition, a pattern portion is also formed on the back side by the light transmitted through the semi-reflective film. Therefore, on the surface side of the resin molded product, the inside is hardly seen through the pattern portion due to reflection of the semi-reflective film, a three-dimensional pattern appears on the surface, and the back side of the resin molded product is light, or The design part appears darkly.

  The reflective surface of the semi-reflective film may be provided upside down on the resin molded product.

  Since the base material is simply molded with the transparent resin and the surface treatment is performed on the back surface, a resin molded product having a three-dimensional pattern can be manufactured at a low cost. A desired appearance can be arbitrarily formed by appropriately selecting the color of the base material resin, coating film, transparent resin material, semi-reflective film, and the like.

  FIG. 12 shows a cosmetic container 2 subjected to the surface treatment of the present invention. The cosmetic container 2 is a resin molded product, and is composed of an upper lid 4 and a main body 6 in which the upper lid 4 is assembled to be freely opened and closed. A symbol A is formed on the upper lid 4 by surface treatment.

  FIG. 1 shows a cross-sectional view of the upper lid 4. The upper lid 4 includes a base material 8 that forms the basic shape of the upper lid 4, a coating film 10 applied to the back surface of the base material 8, a transparent resin material 12 filled between the coating films 10, and semi-reflective. The film 14 is formed.

  The base material 8 is molded from a transparent synthetic resin material using, for example, injection molding. The coating film 10 is opaque black, is provided in places other than the design part 3, and the design part 3 is formed by not providing the coating film 10.

  The transparent resin material 12 is provided in the pattern portion 3 of the coating film 10, that is, in a place where the coating film 10 is not provided. The semi-reflective film 14 is formed on the surface of the coating film 10 and the transparent resin material 12 with the front side of the upper lid 4 as a semi-reflective surface. The reflectance (transmittance) of the semi-reflective film 14 is such that when the upper lid 4 is viewed from the front surface, the semi-reflective film 14 functions as a reflective surface to reflect light, and when viewed from the back surface, the pattern portion 3 is transmitted through the semi-reflective film 14. It is set to a value that is visible.

  Next, the surface treatment method of the upper lid 4 will be described.

  First, a coating material is applied to the entire back surface of the substrate 8 shown in FIG. 2A, and a coating film 10 is provided on the entire back surface of the substrate 8 as shown in FIG. Then, the laser beam is irradiated to the pattern portion 3, that is, the portion corresponding to the letter A shown in FIG. 12, and the coating film 10 at the portion is removed. Thereby, the coating film 10 is formed in places other than the pattern part 3 which does not irradiate a laser beam. (FIG. 2 (c) is shown.) The edge of the pattern portion 3 is formed to be smooth and perpendicular to the substrate 8 as shown in FIG. 2 (c).

  Next, the transparent resin material 12 is filled in the pattern portion 3 of the coating film 10. The transparent resin material 12 is filled in a liquid state, and after being filled, it is solidified inside the pattern portion 3 of the coating film 10. The surface of the transparent resin material 12 is formed flat at the same height as the coating film 10. (Shown in FIG. 2 (d))

  Then, the semi-reflective film 14 is uniformly formed on the surfaces of the coating film 10 and the transparent resin material 12. (See FIG. 2E.) The semi-reflective film 14 is formed by metal vapor deposition so that the front side of the upper lid 4 becomes a semi-reflective surface having a predetermined reflectance.

  Since the top cover 4 is surface-treated as described above, the semi-reflective film 14 is formed in the shape of the pattern portion 3, and when the cosmetic container 2 is viewed from above, the glossy pattern A is the coating film 10. The pattern A appears to float above the surface of the coating film 10.

  Actually, since the semi-reflective film 14 is formed on the bottom surface of the transparent resin material 12, the semi-reflective film 14 is positioned below the coating film 10. An illusion is caused by the influence of refraction of light inside, and the pattern A appears to be located above the coating film 10.

  Furthermore, since the semi-reflective film 14 is light-transmitting in the upper lid 4, when the upper cover 4 is opened, light passes through the semi-reflective film 14, and the shape of the pattern A is as shown in FIG. Visible on the back. The pattern A seen from the back surface of the upper lid 4 has a different atmosphere because it can be seen by a part of the light that has passed through the semi-reflective film 14. Further, changing the angle of the upper lid 4 also changes the degree of reflection of the semi-reflective film 14 and slightly changes the appearance of the pattern A from the back surface.

  Accordingly, when the cosmetic container 2 is entirely visible, the design portion 3 is raised on the surface of the black upper lid 4 and the transparent resin material 12 appears to have the color of the coating film 10 due to the influence of reflection or transmission. There is a sense of luxury. Moreover, the pattern A can also be shown through the back surface of the upper lid 4.

  In the above example, the pattern portion 3 is formed by removing the coating film 10 with a laser. However, the present invention is not limited to this, and printing is directly performed on the base material 8 in such a manner that a predetermined pattern is extracted by silk printing or the like. The pattern portion 3 may be formed.

  FIG. 3 shows another example of the upper lid 4.

  In this example, the transparent resin material 12 is formed with a substantially uniform thickness on the surfaces of the coating film 10 and the base material 8 at the stage of formation up to FIG. Thereafter, the semi-reflective film 14 is formed on the entire surface of the transparent resin material 12 in the same manner as in the above embodiment. Also in this example, the symbol part 3 floats on the upper lid 4 as in the above embodiment, and the symbol part 3 can be formed on the back surface.

  4 and 5 show another example of the surface treatment method applied to the upper lid 4.

  In the example shown in FIG. 4, a semi-reflective film is formed on the back surface of the substrate 8 using a sheet-like semi-reflective member 15. That is, the semi-reflective member 15 is provided on the surface of the coating film 10 and the transparent resin material 12 at the stage where the process up to FIG.

  The semi-reflective member 15 is, for example, a thin film member, and at least the side facing the base material 8 is formed on a reflective surface. The semi-reflective member 15 is attached to the surfaces of the coating film 10 and the transparent resin material 12 using an adhesive or the like.

  Even in this case, the upper lid 4 is formed with a semi-reflective film on the pattern portion 3, and the same effect as the above example can be obtained.

  In the example shown in FIG. 5, the transparent resin material 12 is provided on the coating film 10 and the base material 8 with a substantially uniform thickness at the stage where the process up to FIG. A semi-reflective member 15 is provided on the surface. The semi-reflective member 15 is, for example, a thin-film semi-reflective member formed at least on the side facing the substrate 8 on a semi-reflective surface or the like, and is bonded using an adhesive or the like.

  Further, FIG. 6 shows an example in which a semi-reflective member 17 is provided on the surface of the transparent resin material 12 using a hot stamp method. In this example, after the coating film 10 is provided on the base material 8 and the transparent resin material 12 is applied to almost the entire surface of the base material 8, as shown in FIG. Paste to 3. In the transfer foil 20, a thin film material 24 for transfer is laminated on a sheet-like base material 22, and when a heated pressing die (not shown) is pressed, the thin film material 24 peels from the base material 22 into a pressing die shape. And affixed to an object such as the substrate 8. As described above, the semi-reflective member 17 has a semi-reflective surface on the base material 8 side, and is attached to the back surface of the base material 8 in a wide range including the symbol portion 3 as shown in FIG.

  Also by these, a semi-reflective film is formed on the design portion 3 of the upper lid 4, and the same effect as the above example can be obtained.

  The semi-reflective members 15 and 17 may not be completely adhered along the surface of the transparent resin material 12 and may have gaps at corners or the like, and further, between the transparent resin material 12 and the semi-reflective member 15. An air layer may be provided. The formation of the reflecting member 17 by hot stamping is not limited to the example described above, and may be used when the transparent resin material 12 is formed at the same height as the coating film 10 from an ink agent or the like.

  Furthermore, another example is shown in FIGS. In these examples, the semi-reflective film 14 is formed on one surface of the resin member 16 and the semi-reflective film is formed by attaching the resin member 16 to the back surface of the substrate 8. The resin member 16 is formed in advance so as to conform to the back surface shape of the base material 8 or is made of a flexible material that is appropriately deformed along the back surface shape of the base material 8.

  The structure of the coating film 10 and the transparent resin material 12 in the base material 8 is the same as that described in FIGS. The resin member 16 is attached to the base material 8 by adhesion or assembly, and the attachment method is not particularly limited.

  Thus, even if the resin member 16 having a semi-reflective surface or the like is attached to the base member 8 and the semi-reflective film is formed on the pattern portion 3, the same effect as described above can be obtained. Furthermore, the resin member 16 may constitute the basic shape of the resin product according to the present invention, and the base member 8 may be attached to the resin member 16 to form a three-dimensional pattern.

  FIG. 11 shows another example. In this example, a small thin piece 18 having light reflectivity is mixed in the transparent resin material 12. The flakes 18 may be mixed in the transparent resin material 18 in advance, or may be mixed in the transparent resin material 12 after the transparent resin material 12 is applied to the substrate 8. Thereby, reflection of light is seen inside the transparent resin material 12 in the pattern portion 3, and a new atmosphere different from that described above can be expressed in the upper lid 4. In addition, on the back surface of the upper lid 4, the symbol portion 3 that is transmitted through the semi-reflective film 14 and mixed with the thin piece 18 is seen through.

  Such mixing of the light-reflective thin piece 18 may be used for the upper lid 4 formed by any of the above methods. The thin piece 18 is not limited to a flat shape such as a thin piece, but may be a predetermined shape such as a particulate shape such as a pearl material, a needle shape, or a star shape. Furthermore, it is not light-reflective and may have a predetermined color or consist of a plurality of colors.

  Furthermore, a light-reflective member may be mixed in the base material 8 and the coating film 10 similarly to the transparent resin material 12.

  In the case of FIG. 10, it is preferable that the semi-reflective film 14 is closely attached to the surface of the transparent resin material 12, but the semi-reflective film 14 is not necessarily closely attached to the surface of the transparent resin material 12. A slight gap or an air layer may be formed between the semi-reflective films 14.

  The symbol portion 3 is not limited to the letter A or the like. In addition, characters and patterns may be formed on the surfaces of the semi-reflective film 14 and the semi-reflective members 15 and 17 in advance. Furthermore, a reflective film that totally reflects may be partially overlapped with the semi-reflective film 14 or the like to change the state of reflection on the front surface or the state of transmission on the back surface.

It is sectional drawing of the resin molded product concerning this invention. (A)-(e) is a figure which shows the surface treatment method. It is sectional drawing which shows the other example of a resin molded product. It is a figure which shows the other example of the surface treatment method. It is a figure which shows the other example of the surface treatment method. It is sectional drawing which shows the other example of a resin molded product. It is a figure which shows the other example of the surface treatment method. It is a perspective view which shows the other example of the resin molded product. It is a figure which shows the other example of the surface treatment method. It is a figure which shows the other example of the surface treatment method. It is sectional drawing which shows the other example of a resin molded product. It is a perspective view which shows the whole container for cosmetics. It is a perspective view which shows the container for cosmetics of FIG. 12 which opened the lid | cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Cosmetic container 3 Design part 4 Upper lid 6 Container main body 8 Base material 10 Coating film 12 Transparent resin material 14 Semi-reflective film 15 Semi-reflective member 16 Resin member 17 Semi-reflective member 18 Thin piece

Claims (12)

A base material formed from a transparent resin material, and an opaque coating film provided on the back surface of the base material, and a coating film provided at a location other than the location to be a design portion;
Said the portion which becomes the rear surface in and the pattern portion of the substrate, or and the said pattern portion on the rear surface of the substrate箇plants and the transparent resin material provided at a position over the surface of the coating film,
A resin molded product comprising a surface of the transparent resin material or a semi-reflective film provided over the surface of the coating film and the surface of the transparent resin material. The resin molded product according to claim 1, wherein the transparent resin material has an additive mixed therein. The resin molded product according to claim 2, wherein the additive is a light reflective material. An opaque coating film is provided on the back of the base material formed from a transparent resin material at a location other than the location that becomes the design portion,
The inside of the pattern portion and comprising position, or a transparent resin material provided at a position over the surface of the pattern portion and comprising箇plant and the coating film,
A resin characterized in that a semi-reflective film is formed on the surface of the transparent resin material or over the surface of the coating film and the surface of the transparent resin material to provide a three-dimensional pattern on the surface of the substrate. Surface treatment method for molded products. The method for surface treatment of a resin molded article according to claim 4, wherein a coating film is provided on the entire back surface of the substrate, and the pattern portion of the coating film is irradiated with laser light to remove the coating film on the pattern portion. . The surface treatment method for a resin molded product according to claim 4, wherein a coating film is provided on the substrate by printing at a place other than the place to be the design part. The surface treatment method for a resin molded product according to any one of claims 4 to 6, wherein the transparent resin material is an ink agent, and the ink agent is embedded in a pattern portion to provide a transparent resin material. The surface treatment method for a resin molded product according to any one of claims 4 to 6, wherein the transparent resin material is provided by printing beyond the design portion. The surface treatment method for a resin molded product according to any one of claims 4 to 8, wherein an additive is mixed in the transparent resin material. The resin molding according to any one of claims 4 to 9, wherein a semi-reflective member having at least one surface formed as a semi-reflective surface is provided on the back surface of the base material, and a semi-reflective film is formed on a pattern portion. Product surface treatment method. The surface treatment method for a resin molded product according to any one of claims 4 to 10, wherein the semi-reflective film is formed by hot stamping. The surface treatment method for a resin molded product according to any one of claims 4 to 11, wherein a reflective film that totally reflects is formed on a part of the semi-reflective film on a pattern portion that is provided with the semi-reflective film.

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