JP5342338B2 - Decorative molded product manufacturing method and decorative molded product obtained thereby - Google Patents

Description

  The present invention relates to a method for producing a decorative molded product having a surface portion processed into a colored matte tone, and a decorative molded product obtained thereby.

  Molded articles such as cosmetic containers and mobile phones are often required not only for their own functionality but also for decorativeness. One of the decorative properties is that a part or the whole of the surface of the molded product is matte (matte).

  As a method of making the matte tone, a method of forming a grain by transferring a mold (for example, see Patent Document 1), a method of applying or printing a matte paint (for example, see Patent Document 2), and forming irregularities by sandblasting (For example, refer to Patent Document 3).

JP 2008-30247 A JP-A-9-17144 JP 2007-290731 A

  However, in the method of forming a grain by the above-mentioned mold transfer, it is necessary to form irregularities for forming a grain on the mold surface. Therefore, when changing the pattern of the grain, a mold corresponding to the pattern is newly added. It is necessary to prepare, and it is not possible to easily change the wrinkle pattern. Further, depending on the shape of the irregularities for forming the grain, the grain may not be properly transferred. Furthermore, if it decorates the surface of the formed wrinkle, the decorating surface will also become wrinkled, and a flat decorating surface cannot be formed. Moreover, it is impossible to give a different color to the surface where the wrinkles are formed by only the mold transfer process.

  Further, in the method of applying or printing the matte paint, the matte paint is mixed with matting agents (particles) for forming irregularities, so that the matte paint is not sufficiently cured depending on the amount of the matte paint. There is a risk that the coating or printed layer of the matte paint may peel off.

  In the method of forming irregularities by sandblasting, when patterning a grain, it is necessary to mask the pattern according to the pattern, and the patterning of the grain cannot be facilitated. Moreover, it is difficult to form a delicate pattern by sandblasting.

  The present invention has been made in view of such circumstances, and is a decorative molded product that can simultaneously change a matte tone and a color tone, and can easily set a pattern of an area that gives the change. The object is to provide a production method and a decorative molded product obtained thereby.

  In order to achieve the above object, the present invention provides a step of forming a colored glossy layer containing a metal component in a dispersed manner on at least a part of the surface of a molded product, and irradiating the colored glossy layer with a laser, A process for producing a decorative molded product comprising a step of processing at least a part of the metal component contained in the laser beam to produce a matte tone on the colored glossy layer and changing it to a colored non-glossy layer. It is set as the summary of 1.

  In addition, the present invention has, in particular, a method for producing a decorative molded product using a molded product made of a transparent material as the molded product, and the laser irradiation is performed using a YAG laser, YVO4 laser, or A third gist is a method of manufacturing a decorative molded product which is performed using any one of the semiconductor lasers.

  And this invention is the decoration molded product obtained by the manufacturing method which is the summary of any one of said 1st-3rd, Comprising: The colored non-gloss formed in the at least one part of the surface of this molded product and this molded product The colored non-glossy layer is a matte colored non-glossy layer obtained by removing at least a part of the metal component from the colored glossy layer containing the metal component in a dispersed manner by laser irradiation. The decorative molded product is the fourth gist.

  That is, in the method for producing a decorative molded product according to the present invention, first, a colored glossy layer containing a metal component is formed on at least a part of the surface of the molded product, and then the colored glossy layer is irradiated with a laser. It is a thing. By this laser irradiation, at least a part of the metal component contained in the colored glossy layer is removed. Along with this, the ink component above the removed metal component (colored gloss layer component other than the metal component) is also removed at the same time. Thereby, a laser irradiation part becomes uneven | corrugated shape and becomes a matte tone. That is, the colored glossy layer is changed to a colored non-glossy layer by removing a metal component (cause of gloss of the colored glossy layer) by laser irradiation and accompanying removal of the ink component. In addition, in the portion where the thickness of the colored non-glossy layer is thin (the concave and convex portions described above) and the portion where the metal component is eliminated, the surface of the molded product can be seen through the colored non-glossy layer, In the part where the thickness of the colored non-glossy layer remains relatively thick (the convexo-concave convex part) or the part where the metal component remains, the surface of the molded product is not visible through the colored non-glossy layer. As a result, the colored non-glossy layer becomes translucent.

  Furthermore, since the method for producing a decorative molded product of the present invention performs the change from the colored glossy layer to the colored non-glossy layer by laser irradiation, by adjusting the laser intensity, irradiation time, etc. with a laser device, The degree of removal of the metal component in the colored gloss layer and the ink component thereabove can be adjusted, and as a result, the matte tone and the degree of translucency can be set. Further, by adjusting the laser irradiation area or the like with the laser device, the removal area of the metal component and the ink component thereabove can be adjusted, and as a result, a matte pattern can be set. Further, by appropriately setting the laser irradiation conditions with the laser device as described above, the uniformity and non-uniformity of the formed colored non-gloss layer can be freely set.

  In the method for producing a decorative molded product of the present invention, after forming a colored glossy layer containing a metal component in a dispersed manner on at least a part of the surface of the molded product, the colored glossy layer is irradiated with a laser so that at least one of the above metal components is present. In order to remove the portion, the laser-irradiated portion of the colored glossy layer can be formed in a colored translucent matte tone that has not been conventionally available. Further, since the metal component contained in the colored glossy layer is removed by laser irradiation, the matte color and pattern can be easily set by adjusting the laser irradiation conditions with a laser device. .

  In particular, when a molded product made of a transparent material is used as the molded product, the transparent molded product is seen through from the surface opposite to the colored non-glossy layer forming surface (the back surface of the molded product). Since the matte tone of the colored non-glossy layer can be seen, an interesting decorative property can be obtained. Prior to the formation of the colored glossy layer, if characters or patterns are formed on the surface of the molded product by printing or the like, the characters and the like are transparent from the surface opposite to the colored non-glossy layer forming surface. It is also possible to see through a molded product. In this case, the matte tone of the colored non-glossy layer becomes the background of the characters and the like, and a more interesting decoration can be obtained.

  In addition, when the laser irradiation is performed using any one of a YAG laser, a YVO4 laser, or a semiconductor laser, the metal component contained in the colored glossy layer can be removed efficiently and beautifully. It can be finished and is suitable.

  And since the decorative molded product of the present invention is obtained by the above-mentioned method for producing a decorative molded product, the colored non-glossy layer formed on at least a part of the surface has a conventional color translucent matte tone. It is excellent in decorativeness.

(A) is a perspective view which shows 1st Embodiment of the decorative molded product of this invention, (b) is XX sectional drawing of (a). (A)-(c) is explanatory drawing which shows typically 1st Embodiment of the manufacturing method of the decorative molded product of this invention.

  Next, embodiments of the present invention will be described in detail with reference to the drawings.

  Fig.1 (a) is a perspective view which shows 1st Embodiment of the decorative molded product of this invention, FIG.1 (b) is the XX sectional drawing. This decorative molded product is obtained by forming a colored non-glossy layer (decorative layer) 2 on a part of the surface of a transparent molded product 1 [a part excluding the square part 1a shown in FIG. 1 (a)]. is there. This colored non-glossy layer 2 irradiates the colored glossy layer 2A containing the metal component 2a with a laser (see FIG. 2C), and at least a part of the metal component 2a contained in the colored glossy layer 2A, And a layer formed by removing the ink component (colored glossy layer 2A component other than the metal component 2a) above the metal component 2a, and has a colored translucent matte tone. In this embodiment, a character ["ABC" shown in FIG. 1A] is printed on the surface of the molded article 1 (surface on which the colored non-glossy layer 2 is formed) to form the character. The colored non-glossy layer 2 is formed so as to cover the printing layer 3. In the cross-sectional view of FIG. 1B, the thickness of the colored non-glossy layer 2 and the character print layer 3 and the size of the metal component 2a are exaggerated.

  Such a decorative molded product can be manufactured as follows. 2A to 2C referred to in the description of the manufacturing method, the thickness of the character printing layer 3, the colored glossy layer 2A and the colored non-glossy layer 2, and the size of the metal component 2a are exaggerated. It shows.

  First, as shown to Fig.2 (a), the said character is printed in the predetermined position of the surface of the said transparent molded product 1, and the printing layer 3 which forms the character is formed. Examples of this printing method include ink jet printing, silk screen printing, PAD printing, and the like. The thickness of the character print layer 3 is usually set in the range of 10 to 100 μm.

  Next, as shown in FIG. 2B, at a predetermined position on the surface of the transparent molded product 1 so as to cover the character print layer 3 (a portion excluding the square portion 1a shown in FIG. 1A). The ink composition containing the metal component 2a, such as metallic ink and mirror ink, is applied or printed to form the colored glossy layer 2A. Examples of the application method include painting and transfer processing, and examples of the printing method include silk screen printing, gravure printing, and offset printing. Further, the thickness of the colored glossy layer 2A is set to a thickness that exceeds the thickness of the character print layer 3, and is usually set within a range of 20 to 200 μm.

  Then, as shown in FIG. 2C, the colored glossy layer 2A is irradiated with a laser (see the arrow in the drawing), and at least a part of the metal component 2a contained in the colored glossy layer 2A is removed. At this time, the ink component above the removed metal component 2a is also removed at the same time. Thereby, a laser irradiation part becomes uneven | corrugated shape and becomes a matte tone. That is, the colored glossy layer 2A is changed to the colored non-glossy layer 2 by the removal of the metal component 2a by laser irradiation and the accompanying removal of the ink component. Moreover, in the portion where the thickness of the colored non-glossy layer 2 is thin (the concave-convex concave portion) or the portion where the metal component 2a is eliminated, the surface of the molded product 1 can be seen through the colored non-glossy layer 2. Further, in the portion where the thickness of the colored non-glossy layer 2 remains relatively thick (the concavo-convex convex portion) or the portion where the metal component 2a remains, the surface of the molded product 1 has the colored non-glossy layer 2 formed thereon. As a result, the colored non-glossy layer 2 becomes translucent.

  In this way, the target decorative molded product [see FIGS. 1A and 1B] can be obtained. In this decorative molded product, the colored non-glossy layer 2 has an uncolored, translucent matte tone, which is excellent in decorativeness. Furthermore, since the molded product 1 on which the colored non-gloss layer 2 is formed is transparent, the transparent molded product 1 is formed from the surface opposite to the colored non-gloss layer 2 forming surface (the back surface of the molded product 1). , The matte tone of the colored non-glossy layer 2 can be seen. For this reason, the said decorative molded product has the decorativeness rich in interest. In addition, the decorative molded product allows the character to pass through the molded product 1 from the surface opposite to the colored non-glossy layer 2 formation surface against the matte tone of the colored non-glossy layer 2. Since it can be seen, it has a more interesting decoration.

  In the above example, examples of the material for forming the transparent molded article 1 include synthetic resins such as acrylic resins, and glass. The transparent includes colorless and transparent, colorless and translucent, colored and transparent, and colored and translucent.

  As described above, the colored glossy layer 2A is formed by applying or printing on the surface of the transparent molded article 1 an ink composition containing a metal component 2a such as a metallic ink in a dispersed manner. Examples of the material for forming the ink composition include acrylic, rubber-based, and acrylic / vinyl-based materials. Of these, acrylic and acrylic / vinyl are preferred from the viewpoint of cleanliness of the removal of the ink component accompanying removal of the metal component 2a by laser irradiation. On the other hand, examples of the metal component 2a include aluminum, tin, chromium, and copper. Of these, aluminum and tin are preferable from the viewpoint of excellent removability by laser. Examples of the form of the metal component 2a include a powder form and a scale form. Furthermore, the size of the metal component 2a is set within a range of an average particle size of 10 to 500 μm for a powdery material. The size of the metal component 2a is obtained by observing the metal component 2a in the ink composition with a microscope, measuring 10 samples (metal component 2a), and taking the average value. And it is suitable for the content rate of the said metal component 2a to set in the range of 5-40 weight part with respect to 100 weight part of ink compositions. That is, when the content ratio of the metal component 2a is less than 5 parts by weight, the content ratio of the metal component 2a is low. If the amount exceeds 40 parts by weight, it may be difficult to process the ink.

  Examples of the material for forming the character printing ink (material for forming the character print layer 3) include acrylic, rubber-based, and acrylic / vinyl-based materials.

  In the laser irradiation, a laser such as a YAG laser, a YVO4 laser, or a semiconductor laser is used as the laser so that the metal component 2a is selectively removed. The intensity of the laser is usually set in a range of 3 to 60 W, and the irradiation time of the laser is usually set in a range of 1 second to 3 minutes. The laser irradiation can be performed using various laser devices such as a carbon dioxide laser, a ruby laser, a YAG laser, a YVO4 laser, and a semiconductor laser. From the viewpoint of excellent controllability and finish, a YAG laser, It is preferable to use either a YVO4 laser or a semiconductor laser. And how much the metal component 2a is removed and how much translucency and matte tone are obtained can be adjusted by presetting.

  The second embodiment of the decorative molded product of the present invention is the decorative molded product shown in FIGS. 1 (a) and 1 (b), in which the character is not printed on the surface of the transparent molded product 1. is there. The other part is the same as that of the decorative molded product shown in FIGS.

  Also in the decorative molded product of this embodiment, the colored non-glossy layer 2 is formed in the same manner as the method shown in FIGS. 2 (a) to 2 (c), and is an unprecedented colored translucent mat. Tones. Then, similarly to the decorative molded product shown in FIGS. 1A and 1B, the transparent colored product 1 is seen through the transparent molded product 1 from the surface opposite to the colored non-glossy layer 2 forming surface. Since the non-glossy layer 2 can be seen, it has an interesting decorative property.

  In the third embodiment of the decorative molded product of the present invention, in the decorative molded product shown in FIGS. 1 (a) and (b), the molded product on which the colored non-gloss layer 2 is formed is opaque, The character is not printed on the surface of the molded product. The other part is the same as that of the decorative molded product shown in FIGS.

  Examples of the material for forming the opaque molded product include synthetic resins such as acrylic resin, AS resin, and ABS resin, and metals such as stainless steel.

  Also in the decorative molded product of this embodiment, the colored non-glossy layer 2 is formed in the same manner as the method shown in FIGS. 2 (a) to 2 (c), and is an unprecedented colored translucent mat. Tones. This can obtain an interesting impression by directly looking at the surface on which the colored non-gloss layer 2 is formed. For this reason, the decorative molded product of this embodiment is also excellent in decorativeness.

  Next, examples will be described together with comparative examples. However, the present invention is not limited to the examples.

[Example 1]
As a molded product, a colorless and transparent plate-like product (thickness 2 mm) made of an acrylic resin was prepared. Further, a metallic ink containing 20 parts by weight of an aluminum powder having an average particle diameter of 20 μm was prepared with respect to 100 parts by weight of an acrylic green ink composition. Furthermore, a laser device for YAG laser (manufactured by Keyence Corporation) was prepared.

  Then, the metallic ink was printed on the surface of the colorless and transparent molded product by silk screen printing to form a colored glossy layer having a thickness of 30 μm. Subsequently, the colored glossy layer was irradiated with a YAG laser by the laser device. In this YAG laser, the scanning speed was set to 1000 mm / SEC in order to remove the aluminum powder. Further, the laser intensity was set to 6 W, and the laser irradiation time was set to 30 seconds. In this way, the colored glossy layer was changed to a colored non-glossy layer processed into a green translucent matte tone to obtain a decorative molded product.

[Example 2]
A colored non-glossy layer was formed in the same manner as in Example 1 except that a green opaque plate-like material (thickness 2 mm) made of acrylic resin was used as the molded product.

[Comparative Example 1]
Using a green opaque acrylic resin as a material, a molded product having a surface with a wrinkle was produced by mold transfer, and the surface with the wrinkle formed was matte.

[Comparative Example 2]
A green mat-like paint (Seiko Advance Co., Ltd.) was printed on the surface of a colorless and transparent plate-shaped molded product made of the same acrylic resin as in Example 1 by silk screen printing, and the printed surface was matte-like. .

[Comparative Example 3]
Unevenness was formed on the surface of the green opaque plate-like molded product made of the same acrylic resin as in Example 2 by sandblasting, and the surface on which the unevenness was formed was matte.

[Appearance evaluation]
The external appearance of the decorative molded products of Examples 1 and 2 and Comparative Examples 1 to 3 was visually observed. As a result, in the decorative molded products of Examples 1 and 2, the colored non-glossy layer formed in a matte tone became translucent and excellent in decorativeness. In particular, in the decorative molded product of Example 1, since the colored non-gloss layer was formed on the surface of the transparent molded product, the decorative molded product had an interesting decorative property. On the other hand, in the decorative molded products of Comparative Examples 1 to 3, there was no change in the color tone of the matte portion and the base material resin, and the decorativeness was inferior.

  In Examples 1 and 2, the same result as above was obtained even when a mirror ink was used instead of the metallic ink as the material for forming the colored glossy layer. In addition, the same results as described above were obtained when a YVO4 laser or a semiconductor laser was used instead of the YAG laser.

  The method for producing a decorative molded product of the present invention can be used for manufacturing a molded product that requires decorativeness, such as a cosmetic container or a mobile phone.

1 Molded product 2 Colored non-glossy layer 2a Metal component

Claims (4)

  A step of forming a colored glossy layer containing a metal component dispersedly on at least a part of the surface of the molded article, and irradiating the colored glossy layer with a laser to remove at least a part of the metal component contained in the colored glossy layer. And a step of processing the laser-irradiated portion of the colored glossy layer into a matte tone and changing it to a colored non-glossy layer.   The method for producing a decorative molded product according to claim 1, wherein a molded product made of a transparent material is used as the molded product.   The method for producing a decorative molded product according to claim 1 or 2, wherein the laser irradiation is performed using any one of a YAG laser, a YVO4 laser, and a semiconductor laser.   A decorative molded product obtained by the production method according to any one of claims 1 to 3, comprising a molded product and a colored non-gloss layer formed on at least a part of the surface of the molded product. The colored non-glossy layer is a matte-colored non-glossy layer obtained by removing at least a part of the metal component from the colored glossy layer containing the metal component in a dispersed manner by laser irradiation. Decorative molded product.

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