JP2007144908A - Decorated plastic molding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily form delicate patterns with rugged pattern feeling on the surface of a plastic molding, and further afford visual effects as if forming rugged patterns obtained by etching of a metal to thereby provide inexpensively a plastic molding with luxury feeling. <P>SOLUTION: This decorated plastic molding is obtained by the steps of forming a specular layer with metallic luster on the surface, forming a transparent coating film layer on the specular layer, forming a mat-finished print layer capable of transmitting light in a predetermined pattern on the transparent coating film layer, thereby realizing to produce patterns having three-dimensional visual effects by virtue of mat printed parts and specular non-printed parts. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a plastic molded product in which the entire surface or a part thereof is decorated in a metallic shape.

In a container for cosmetics and the like, where the decorativeness in the package occupies a large portion of the product power, it is desired that the product image is greatly improved by exhibiting various decorative properties by painting, printing, and the like. For example, Patent Document 1 describes an invention related to a cosmetic container in which a metallic decoration is three-dimensionally applied using a hot stamp method, and a high-quality image is provided by imparting a metallic luster to the surface. Can be granted.
JP-A-6-286397

  However, the above-described prior art is a method of previously forming a convex pattern on the surface of a molded product in advance, and laminating a metal foil by hot stamping on the upper surface of the convex pattern, and the cost for decoration increases. In addition, it is difficult to form a fine, delicate or precise pattern due to the processing method, and it is unsatisfactory in terms of luxury.

  Therefore, the present invention easily forms a delicate pattern having a concavo-convex sensation on the surface of a plastic molded article, and further imparts a visual effect as if a pattern was formed in a concavo-convex shape by etching a metal. Therefore, it is an object of the present invention to provide a low-priced plastic molded product.

Among the present invention for solving the above technical problems, the means of the invention according to claim 1 is a decorative plastic molded article,
A mirror surface layer having a metallic luster is formed on the surface, a transparent coating layer is formed on the mirror coating layer, and a matte finish printing layer capable of transmitting light in a predetermined pattern is formed on the transparent coating layer. The present invention has a configuration in which a pattern having a three-dimensional visual effect appears by a mat-like printed portion and a mirror-like non-printed portion.

  According to the above-described configuration, the non-printing portion has a mirror-like shape having a metallic luster, and the printing portion has a metallic luster similar to that of the non-printing portion by a mat-like (matte) printing layer. However, it can be in a matte state.

Here, when a light beam is applied to such a molded product, a certain region of the edge portion that forms the boundary between both portions appears to shine according to the irradiation direction of the light beam and the position of the eye to be observed. A region (hereinafter referred to as a border region) in which a part of the printed portion appears bright in a thin band shape is observed so as to border the edge portion that appears bright.

  The bordering area described above is considered to be formed when the light irradiated near the edge of the mirror-like non-printed part is reflected by the mirror, passes through the transparent coating layer, and reaches the printed layer near the edge. It is done. The appearance and appearance of this border area varies depending on the thickness of the transparent coating layer, the irradiation angle of the light beam, the observation position, the thickness of the printing layer, and the light scattering mode of the mat-like printing layer. In particular, the width of the border region is as if the dimension in the thickness direction of the transparent coating layer was reflected on the printing layer.

In addition, the edge portion that looks bright and the action of the border region combine, and the mirror-like non-printed portion that is actually formed in a concave shape by the thickness of the printed layer appears to have floated on the printed portion. A visual effect that looks like a convex shape. In addition, a visual effect is provided as if the mat-like printed portion is a portion obtained by etching a mirror-like metal. Moreover, since patterns such as letters, designs, and patterns are formed by the formation pattern of the printed layer, a delicate pattern can be easily revealed as compared with the hot stamp method or the like.
The thicker the transparent coating layer, the deeper it is possible to give a feeling of unevenness. However, if the thickness is too thick, the uniformity of the coating film or the productivity related to the coating process decreases. This is a design item that can be determined while considering

  Here, as a method of forming a mirror-like layer having a metallic gloss on the surface, a method of forming a metal thin film by vapor deposition or sputtering, or a transparent synthetic resin such as an acrylic resin, a urethane resin, or a polyester resin is used as a vehicle. There is a method of printing with a printing ink in which metal powder such as aluminum powder or silver powder is mixed and dispersed. Further, the transparent coating layer and the printing layer of the present invention are not limited to being colorless, and can be used by coloring in consideration of decorative curing.

  The coating material used for forming the transparent coating layer is selected in consideration of the protection of the mirror surface layer and the function for ensuring the adhesion of the mirror surface layer to the printing layer. Acrylic resin-based paints are mainly used after being cured by ultraviolet (UV), but heat-drying urethane resin-based or epoxy resin-based paints can also be used.

  The printing ink used to form the matte printed layer is made of a transparent synthetic resin such as acrylic resin, urethane resin, or polyester resin, and is used for matte such as silica powder, alumina powder, or synthetic resin powder. An evaporative drying or ultraviolet curable printing ink in which the above powder is mixed and dispersed is preferred.

  Moreover, as a printing method of such a printing ink, printing methods, such as screen printing, offset printing, gravure printing, and flexographic printing, are used, and screen printing is especially suitable for this use.

  In addition, in the decorative plastic molded product according to the first aspect of the present invention, an anchor layer is added between the surface of the molded product and the mirror surface layer, for example, within the range in which the above-described effects can be exhibited, or a transparent coating layer 2 is added. Other layers can be added as needed, such as forming a layer or adding a normal print layer.

  According to a second aspect of the present invention, in the first aspect of the invention, the thickness of the transparent coating layer is 5 microns or more.

According to the above configuration of the second aspect, by setting the thickness of the transparent coating layer to 5 microns or more, the border region can be made clearer and the visual effect related to the unevenness can be exhibited more clearly.

  The means of the invention described in claim 3 is that, in the invention described in claim 1 or 2, the thin film layer is a metal vapor deposition film.

  According to the above-described configuration of the third aspect, the metal thin film can be formed uniformly and mirror-like in a wide range of the molded product. Various metals and alloy compounds can be applied for vapor deposition, and can be selected in consideration of the color tone, material cost, easiness of vapor deposition process, and the like.

  According to a fourth aspect of the present invention, in the invention according to the first, second, or third aspect, the print layer is formed in a solid print form, and a pattern is formed by a non-print portion.

  According to the above-described configuration of the fourth aspect, it is possible to easily exhibit the decorative effect by the etching process of the metal such that the characters, designs, patterns and the like having specular gloss are raised in the mat-like region. The pattern is formed by printing such as screen printing, and a fine, delicate or fine pattern can be revealed.

  According to a fifth aspect of the present invention, in the invention according to the first, second, third, or fourth aspect, the printing ink for forming the printing layer is a mat-like ink in which fine powder silica is dispersed.

  According to the above-described configuration, the mat-like ink in which fine powdery silica is dispersed in the matrix component can be used to make the mat into a softer feeling, and the visual effect relating to the unevenness more effectively. Can be demonstrated.

The present invention has the above-described configuration, and has the following effects.
In the first aspect of the invention, the edge portion at the boundary between the printed portion and the non-printed portion appears to be shining due to the irradiation of the light beam, and further, the action of the border region is combined. For this reason, a visual effect is exhibited such that a mirror-like non-printing portion formed in a concave shape looks convex as if it floated on the printed portion.

  In addition, since patterns such as letters, designs, and patterns are formed by the formation pattern of the printed layer, it is possible to easily reveal delicate patterns as compared with hot stamping methods, etc. A visual effect is given as if it were etched.

In the invention described in claim 2, the visual effect relating to the unevenness can be clearly exhibited by setting the thickness of the transparent coating layer to 5 microns or more.

In the invention according to claim 3, the metal thin film can be easily formed in a uniform and specular shape over a wide range of the molded product.

In the invention according to claim 4, the decorative effect by the metal etching that makes the pattern having specular gloss rise in the mat-like region can be easily exhibited. Further, this pattern is formed by printing such as screen printing, and a fine, delicate and precise pattern can be easily formed.

In the invention of claim 5, the mat-like ink in which finely divided silica is dispersed in the matrix component can be made into a softer mat, and more effectively relates to the unevenness. Visual effects can be demonstrated.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of a decorative plastic molded product according to the present invention, and is a plan view of a lid of a compact container. This lid is made of ABS resin, and FIG. 2 is a longitudinal sectional view thereof. For decoration on the molded product 1, an anchor layer 6, a metal vapor-deposited film layer 2 a that is a mirror surface layer 2, and a transparent coating layer 3. Each layer is laminated in the order of the mat-finished printed layer 4.

  The anchor layer 6 is a layer formed by UV curing an acrylic resin-based paint, and has a function of improving the adhesion of the vapor deposition film layer 2a to the surface of the molded product. Further, the vapor deposition film layer 3 is a layer formed by using aluminum as a metal by a vacuum vapor deposition machine, and the transparent coating film layer 3 is a colorless and transparent layer formed by UV curing an acrylic resin-based paint, The thickness is about 10 microns.

  The printing layer 4 is a translucent layer formed by screen printing using an ultraviolet curable printing ink in which an acrylic resin is used as a vehicle, and fine silica powder is blended and dispersed in the acrylic resin. The film thickness is about 15 microns. Further, the printed layer 4 is printed and formed in a solid shape by screen printing on the portion excluding the star-shaped and snow crystal-like pattern 7 and the peripheral portion as seen in FIG.

When this decorative plastic molded product is viewed, the printed portion 5a on which the printed layer 4 extending substantially over the entire plane is formed in a mat shape, but the color of the metal of the mirror surface layer 2 is observed. In addition, a non-printing portion 5b is provided to reveal a star-like and mirror-like pattern 7 having a mirror-like gloss.
Here, the non-printing portion 5b in which the pattern 7 appears is actually recessed by the thickness of the printing layer 4, but it appears as if it is raised on the printing portion 5a and formed in a convex shape. A visual effect is exhibited, and a visual effect like that obtained by etching a metal material having a mirror-like surface is given, and an unprecedented high-class feeling is exhibited.

  FIG. 3 is a diagram for schematically explaining the mechanism related to the visual effect described above, and FIG. 3A is a perspective view of one star-shaped pattern 7 in FIG. For example, as shown in the drawing, when the light beam L is irradiated from the upper left, the portion of the edge portion 8 that is the boundary between the printed portion 5a and the non-printed portion 5b shines in the range from S2 to S3 to S4. In a region having brightness different from that of the other printed portions 5a so that the edge portion 8 is bordered on the printed portion 5a indicated by hatching along the portion where the edge portion 8 appears bright in the drawing. A border area 9 is observed.

FIG. 3B is a longitudinal sectional view in the vicinity of the edge portion 8 and shows an aspect related to the reflection of the light beam L by the mirror layer 2 in the vicinity of the edge portion 8. Of the light rays L irradiating the non-printing portion 5b from the upper left, the light rays L incident and irradiated near the edge portion 8 are reflected by the mirror surface layer 2 and pass through the transparent coating layer 3 to reach the printing layer 4. As a result, a strip-like portion that is brighter than the other printed portion 5a, that is, a border region 9 is observed so as to border the edge portion 8.
Then, the bright and visible portion of the edge portion 8 and the pattern 7 that is actually formed in a concave shape by the thickness of the printing layer 4 by the border region 9 are projected as if they were raised on the mat-like printed portion 5a. A visual effect that looks like a shape.

  The appearance of the border region 9 depends on the thickness of the transparent coating layer 3, the irradiation angle of the light beam L, the observation position, the thickness of the printing layer 4, the light scattering mode in the mat-like printing layer 4, and the like. Although the brightness and width are different, the border region 9 is so that the thickness direction of the transparent coating layer 3 is projected on the printing layer 4, and the thickness of the transparent coating layer 3 is too thin. However, the visual effect that the pattern 7 appears to float up is not sufficiently exhibited, but the visual effect is clearly exhibited by setting the film thickness to 5 microns or more as in this embodiment.

  In addition, the effect of this invention is not limited to the said Example, A various variation can be employ | adopted in the range in which the effect of this application is exhibited. For example, the transparent coating layer and the printing layer are not limited to colorless, and can be colored according to the purpose of decoration. Moreover, another layer can be added as needed and the decoration by the printing using a normal printing ink can also be used together.

  The decorative plastic molded product according to the present invention can give a high-class feeling due to the visual effect of etching a metal material, and can be expected to be widely developed in the field of cosmetic containers and the like.

It is a top view which shows one Example of the decorative plastic molded product of this invention. In the molded article of FIG. 1, it is a longitudinal cross-sectional view which shows the lamination | stacking state of a decoration layer. (A) is a perspective view showing the vicinity of the pattern in the molded product of FIG. 1, and (b) is a schematic explanatory view showing in a longitudinal section an aspect related to reflection of light rays in the vicinity of an edge portion.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1; Molded article 2; Mirror surface layer 2a; Deposition film layer 3; Transparent coating layer 4; Print layer 5a; Print part 5b; Non-print part 6; Anchor layer 7; Pattern 8; Edge part 9;

Claims (5)

Forming a mirror surface layer (2) having a metallic luster on the surface, forming a transparent coating layer (3) on the mirror layer (2), in a predetermined pattern on the transparent coating layer (3) A matte-finished printing layer (4) capable of transmitting light is formed, and the matte printed portion (5a) and the mirror-like non-printed portion (5b) exhibit a pattern having a three-dimensional visual effect. Decorated plastic molded product. The decorative plastic molded product according to claim 1, wherein the thickness of the transparent coating layer (3) is 5 microns or more. The decorative plastic molded product according to claim 1 or 2, wherein the mirror layer (2) is a metal vapor-deposited film. The decorative plastic molded product according to claim 1, 2 or 3, wherein the printed layer (4) is formed in a solid printed form, and a pattern is revealed by the non-printed portion (5b). The decorative plastic molded article according to claim 1, 2, 3, or 4, wherein the printing ink for forming the printing layer (4) is a mat-like ink in which fine powder silica is dispersed.

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