JP2015085585A - Method for manufacturing decorative molded body and decorative molded body produced by the same method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a decorative molded body that can easily impart fine convexoconcave showing matte-tone appearance to the surface of a resin molded body and to provide a decorative molded article produced by the method.SOLUTION: The method for manufacturing a decorative molded body comprises the steps of: preparing a base material 5 forming a cap 1; forming a first topcoat layer 7 directly or through another layer on the surface of the base material 5; and further forming a second topcoat layer 8 on the first topcoat layer. When forming the second topcoat layer 8, a coating material for a second topcoat is cured while being repelled from the surface of the first topcoat layer to thereby impart fine foamy convexoconcave to the resultant second topcoat layer 8.

Description

  TECHNICAL FIELD The present invention relates to a method for producing a decorative molded body in which fine unevenness with a matte tone is provided on the surface of a resin molded body, and a decorative molded body obtained thereby.

  Cosmetic containers, food containers, stationery, and the like are required not only to have functionality, but also to have a good design and a design that reflects the product image. In order to meet such demands, for example, the main body is composed of a resin molded body shaped into a predetermined shape, and the surface thereof is made full use of technologies such as printing, transfer, vapor deposition, and in-mold molding. Various decorations with colors and patterns are widely used.

  As one of the decoration techniques for such a resin molded body, a metal vapor-deposited film is formed on the surface of the resin molded body or a metal foil is transferred to finish the surface with a beautiful metallic gloss. It has been broken. In addition, recently, a textured tone and a matte tone with reduced metallic luster have been favored as having a higher-class feeling.

  In order to obtain the matte-like resin molded body, for example, after obtaining a resin molded body with irregularities using a mold with textured or hairline irregularities, a metal thin film layer is formed on the surface thereof. A method of forming (refer to Patent Document 1), a method of forming a metal thin film layer on the surface of a resin molded body, and pressing a special unevenness imparting tool thereon to form unevenness (refer to Patent Document 2) are proposed. Has been.

Japanese Patent Laid-Open No. 2008-981 JP 2006-185699 A

  However, these methods require the preparation of a special mold for forming unevenness and an unevenness imparting tool, and there is a problem that it takes time and labor and increases the manufacturing cost. In addition, it is not easy to form fine unevenness, and there is a problem that a portion where transfer of unevenness is insufficient occurs and it is difficult to obtain a uniform matte shape.

  The present invention has been made in view of such circumstances, and unlike the conventional case, the decorative molding that can easily give the surface of the resin molding a fine unevenness that looks like matte or grainy. The object is to provide a method for producing a body and a decorative molded body obtained thereby.

  In order to achieve the above object, the present invention includes a step of preparing a resin molded body having a predetermined shape, and a first topcoat layer directly or via another layer on the surface of the resin molded body. And a step of forming a second topcoat layer on the first topcoat layer, and when the second topcoat layer is formed, a second topcoat paint is formed. First, a method for producing a decorative molded body which is cured while being repelled from the surface of the first topcoat layer, and thereby imparts fine foamy irregularities to the obtained second topcoat layer, It is set as the summary of 1.

  In the present invention, in particular, a metal thin film layer is formed on the surface of the resin molded body via an undercoat layer, and the first topcoat layer is formed thereon. Let the manufacturing method of a decoration molded object be a 2nd summary.

  Furthermore, the present invention is a decorative molded body obtained by the manufacturing method according to the first aspect, wherein the first shape is directly or via another layer on the surface of a resin molded body to which a predetermined shape is given. A top coat layer is formed, and a second top coat layer is further formed thereon, and the second top coat layer is provided with a decorative molded body provided with fine foamy irregularities. This is the third gist.

  In particular, the present invention is a decoration in which, in particular, a metal thin film layer is formed on the surface of the resin molded body via an undercoat layer, and the first topcoat layer is formed thereon. Let a molded object be the 4th summary.

  That is, in the present invention, a second topcoat layer is further formed on the surface of the resin molded body, on the first topcoat layer formed directly or via another layer. . According to this manufacturing method, a dense topcoat layer that exhibits high water repellency and oil repellency is originally formed, and a coating material for forming the second topcoat layer is additionally applied. The paint is cured while being repelled from the surface of the first topcoat layer. Therefore, the obtained second topcoat layer is a layer to which fine foamy irregularities are imparted, and the surface has a rough feel as if the matte treatment has been performed. In some cases, a grainy texture can be imparted. And when the said 2nd topcoat layer is transparent, a fine foam-like pattern can also be visually recognized also inside the layer.

  As described above, according to the manufacturing method of the present invention, a mat for molding or an applicator for imparting unevenness later is unnecessary, and a decorative molded body with a matte or textured luxury feeling is produced. Easy to get. And since the surface of the obtained decorative molded body is rough, fingerprints remaining when touched by hand, adhesion of dirt, etc. are hardly noticeable, and a beautiful appearance can be maintained for a long time.

  In addition, since the decorative molded body is provided with fine foamy irregularities on the second topcoat layer, which is the outermost layer, even if a strong impact is applied from the outside to the resin molded body, These fine irregularities can absorb the impact, and damage to the resin molded body can be reduced. Therefore, this product is not only difficult to be damaged, but also has an advantage that, for example, when used as a main body or lid of a compact container filled with a solid cosmetic, the cosmetic filled inside is hardly cracked. Have.

  Among the production methods of the present invention, in particular, a metal thin film layer is formed on the surface of the resin molded body via an undercoat layer, and the first topcoat layer is formed thereon, By the interposition of the metal thin film layer, the strength of the decorative molded body is increased, and the impact resistance is further improved. In addition, when the first and second top coat layers disposed above the metal thin film layer are transparent, the metallic luster of the metal thin film layer is limited by the matte effect of the second top coat layer. It has a very beautiful appearance.

It is a perspective view of the cap which is one embodiment of the present invention. It is XX 'sectional drawing of FIG. It is explanatory drawing of the said cross section. It is a partial top view of the said cap surface. It is explanatory drawing of the cross section in other embodiment of this invention.

  Next, an embodiment for carrying out the present invention will be described. However, the present invention is not limited to the following embodiments.

  FIG. 1 is a perspective view showing an embodiment in which the present invention is applied to a cap 1 of a bottle container filled with a liquid cosmetic. The cap 1 is attached to the mouth portion of the main body 2 of the bottle container so as to be openable and closable by screw engagement. The cap 1 has a substantially cylindrical shape, and the top surface 3 and the side peripheral surface 4 are beautiful. Has a matt appearance.

  As shown in FIG. 2, which is a cross-sectional view taken along the line XX 'of FIG. 1, the cap 1 includes a base material 5 made of a resin molded body in which the basic shape of the entire cap 1 is shaped, and its top surface 3 and side A first top coat layer 7 and a second top coat layer 8 formed on the surface of the peripheral surface 4 are provided. 2 to 5, the thickness and shape are schematically shown for easy explanation.

  And, as shown in FIG. 3, the surface of the second top coat layer 8 is schematically shown with an enlarged cross-section, the entire layer contains fine bubbles 20, Fine irregularities derived from the fine bubbles 20 are formed and have a matte appearance.

  The cap 1 can be manufactured, for example, as follows. That is, first, a resin material for forming the base material 5 is injection-molded using a mold to obtain the base material 5 in which the basic shape of the cap 1 is shaped. Examples of the resin material of the base material 5 include acrylic resin, polypropylene (PP), acrylonitrile-butadiene-styrene copolymer resin (ABS), and polycarbonate (PC). The color may be colorless and transparent, or may be colored by adding a pigment or the like.

  Moreover, although the thickness of the said base material 5 is based also on the magnitude | size and shape of the whole, in this example, it is suitable that it is about 0.8-3 mm. That is, if it is thinner than the above range, it may be weak in strength, and if it is too thick, the resulting decorative molded body (cap in this example) is undesirably bulky.

  Next, a first topcoat layer 7 is formed by applying and curing a first topcoat paint on the surface of the base material 5. As the top coat paint, for example, it is preferable to use a photocurable resin such as acrylic, urethane acrylate, epoxy acrylate, polyester acrylate, acrylic acrylate, or polyether acrylate. Among them, the first top coat layer 7 that is excellent in adhesion to the base material 5 and repels the paint for the second top coat layer 8 to be coated thereon in a fine foam form. Since it is preferable to be a hard type, a hard type having particularly strong water repellency and oil repellency is most suitable.

  When the color of the base material 5 is shown through the surface of the cap 1, it is necessary to use a transparent paint so that the first top coat layer 7 is transparent. Of course, by changing the degree of transparency or coloring, it is possible to adjust the color of the color to be seen through.

  Next, a second topcoat paint is applied on the first topcoat layer 7 and cured to form the second topcoat layer 8. At this time, since the surface of the cured first topcoat layer 7 is dense and has a property of repelling water and solvent, the second topcoat paint is applied from the surface of the first topcoat layer 7. It cures while being repelled. Therefore, the obtained second top coat layer 8 contains fine bubbles 20 and has fine irregularities derived from the fine bubbles 20 on the surface (see FIG. 4). It feels as if it had been matted.

  As the second topcoat paint, the same as the first topcoat paint, for example, acrylic, urethane acrylate, epoxy acrylate, polyester acrylate, acrylic acrylate, polyether acrylate, etc. It is preferable to use a photocurable resin. The type of paint may be the same as or different from the first top coat paint.

  The cap 1 thus obtained can be provided at low cost because it can be easily obtained without using a special mold for matting or an applicator for imparting irregularities later. . In addition to the matte tone, depending on the conditions, it is possible to give a rougher uneven shape, and the surface can be finished to a grainy texture, so it is necessary to provide a mold and special process for graining There is no.

  And the said cap 1 has the fine foam-like unevenness | corrugation formed in the surface of the top | upper surface 3 and the side peripheral surface 4, and the surface is rough as if the matte process or the embossing process was performed. It has become a touch. Therefore, this is not a mere smooth resin surface, but has a matte or textured appearance with a high-class appearance, and fingerprints and dirt adhering when touched with the hand are not noticeable. Can maintain a beautiful appearance over a long period of time.

  Moreover, since the said cap 1 is provided with the foamy fine unevenness | corrugation to the 2nd topcoat layer 8 which is the outermost layer, even if a strong impact is applied to the cap 1 from the outside, the said foam-like fine The unevenness makes it easy to absorb the impact. Therefore, this can reduce the received damage, and has the advantage that it is hard to be damaged, and even if it is accidentally dropped, it does not easily crack or chip.

  In the above example, when all of the base material 5, the first top coat layer 7, and the second top coat layer 8 are transparent, the second layer which is the outermost layer while being entirely transparent. Since the fine bubble-like irregularities of the top coat layer 8 give subtle shadows to the transparent layers, an interesting skeleton specification can be obtained.

  As another embodiment of the present invention, as shown in FIG. 5, a metal thin film layer 10 is formed on the surface of a base material 5 via an undercoat layer 6, and a first top coat is formed thereon. The layer 7 and the second topcoat layer 8 may be formed in this order.

  The undercoat paint for forming the undercoat layer 6 is appropriately selected in consideration of the adhesiveness with the base material 5 below. For example, it is preferable to use a photocurable resin such as acrylic, urethane acrylate, epoxy acrylate, polyester acrylate, acrylic acrylate, or polyether acrylate.

  In this example, if both the first top coat layer 7 and the second top coat layer 8 are made transparent, the metallic luster of the metal thin film layer 10 is matted by the fine foamy irregularities thereon. Since it is seen through in a state where it overlaps with the second topcoat layer 8 that has a tone, the matte metallic luster gives a very high-class impression.

  In the configuration shown in FIG. 5, when the first top coat layer 7 and the second top coat layer 8 above the metal thin film layer 10 are opaque, the metallic luster of the metal thin film layer 10 cannot be seen from the outside. However, the metal thin film layer 10 serves as a reinforcing layer of the cap 1 and, in combination with the impact absorbing action by the fine foamy irregularities of the second top coat layer 8, it is particularly shock resistant. It will be excellent.

  In these examples, the present invention is applied to a cap of a bottle container. However, the resin molded body to which the present invention is applied is not limited to this example, and may be various resin molded bodies or resin molded bodies. A combination of these members can be used. For example, it can be widely applied to various containers such as cosmetic containers and food containers, mobile phones, stationery, toys, home appliances, and the like.

  And the said resin molding is not restricted to what was obtained by injection molding like the said example, It does not interfere even what was obtained by what kind of shaping | molding method.

  The present invention can be used in a method for producing a decorative molded body having fine matte-like fine irregularities and a decorative molded body obtained thereby, for example, various containers, mobile phones, stationery, toys, It can be widely applied to household appliances and the like.

1 Cap 5 Base Material 7 First Top Coat Layer 8 Second Top Coat Layer

Claims (4)

  A step of preparing a resin molded body having a predetermined shape, a step of forming a first topcoat layer on the surface of the resin molded body directly or via another layer, and the first topcoat. Forming a second topcoat layer on the layer, and when forming the second topcoat layer, the second topcoat paint is repelled from the surface of the first topcoat layer. The method for producing a decorative molded body is characterized in that it is cured while being imparted with fine foamy irregularities on the resulting second top coat layer.   The method for producing a decorative molded body according to claim 1, wherein a metal thin film layer is formed on the surface of the resin molded body via an undercoat layer, and the first topcoat layer is formed thereon.   A decorative molded body obtained by the manufacturing method according to claim 1, wherein the first topcoat layer is formed directly or via another layer on the surface of the resin molded body having a predetermined shape, On the top, a second topcoat layer is formed, and the second topcoat layer is provided with fine foam-like irregularities.   The decorative molded body according to claim 3, wherein a metal thin film layer is formed on the surface of the resin molded body via an undercoat layer, and the first topcoat layer is formed thereon.

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