JP6198112B2 - Decorative synthetic resin molded product and method for producing the same - Google Patents

Description

The present invention relates to a synthetic resin molded product decorated with a metallic gloss imparted to the surface by a metal vapor deposition layer and a method for producing the same .

In a container for cosmetics or the like, where decoration on the package occupies a large portion of the product power, it is desired that the product image be greatly improved by exhibiting various decorating properties by painting and printing.
As one of the methods for imparting such a decorating property, there is a method for decorating the surface of a molded product by laminating a metal vapor deposition layer, and a high-class feeling can be produced by imparting a metallic luster.

However, when a metal vapor deposition layer is laminated on the surface of a molded product having a mirror-like surface property, a mirror-like metallic luster appears from the entire surface of the molded product. It is necessary to reveal a metallic luster of the tone.
Patent Document 1 describes a method in which fine irregularities are formed on the surface of a molded product, that is, a so-called graining process is performed, and a grainy metallic luster is imparted by the irregularities.
FIG. 4 is a cross-sectional view showing a laminated structure of a conventional example of a decorative molded product in which this kind of metal vapor-deposited layer is laminated. In the drawing, from bottom to top, the molded product 101 / undercoat layer 102 / The metal vapor deposition layer 103 / the top clear coat layer 105 are laminated in this order.

Here, when the metal vapor deposition layer 103 is laminated on the surface of the molded product 101, the adhesion between the surface of the molded product 101 and the metal vapor deposition layer 103 is firmly maintained over a long period of time. It is necessary to coat, dry, and cure an ultraviolet-curable coating solution such as acrylic, and laminate the undercoat layer 102, and laminate the metal vapor deposition layer 103 on the undercoat layer 102.
Then, in the method of applying a texture to the surface of the molded product described in Patent Document 1 described above, the coating liquid before UV curing may have a relatively low viscosity, and the upper surface of the coating liquid is easily flattened. The unevenness Pa formed on the surface of the undercoat layer 102 becomes smooth like the unevenness Pb on the upper surface of the undercoat layer 102, and the unevenness does not sufficiently appear on the metal vapor deposition layer 103, and it is difficult to reveal the fine unevenness. There are problems such as.

Further, in the method of embossing the surface of the molded product as described above, it is necessary to engrave the irregularities on the cavity surface of the mold used when the molded product is used, When processing is desired, it is necessary to separately prepare an expensive mold, and it becomes difficult to change the unevenness according to the decoration purpose.

JP-B-2-12630

In view of the above, the present invention has a technical object to impart a grain-like metallic luster with various variations to the surface of a molded product by metal deposition without subjecting the cavity surface of the mold to a graining process.

Of the present invention relating to the means for solving the above technical problems, the main structure of the decorative synthetic resin molded product is that an undercoat layer is laminated on the surface of the molded product, and a metal vapor deposition layer is laminated on the undercoat layer. In addition, in decorative synthetic resin molded products with a top clear coat layer laminated,
The undercoat layer is an acrylic UV curable type in which crosslinked urethane beads or crosslinked acrylic beads having an average particle size of 6 to 50 micrometers are dispersed as fine particles, and the fine particles form irregularities on the upper surface of the undercoat layer. It is said that a grainy metallic luster appears on the surface of the molded product by the metal vapor deposition layer laminated along the unevenness.

According to the above configuration, the fine particles dispersed in the undercoat layer have an average particle size of 6 to 50 micrometers, and the surface of the undercoat layer can be modified in various variations by adjusting the amount of fine particles dispersed. Unevenness can be formed on the
Since the metal vapor deposition layer, which is a thin film, is directly laminated along this irregularity without passing through another layer, the irregular shape formed on the upper surface of the undercoat layer is faithfully inherited by the irregularity of the metal vapor deposition layer. The surface of the molded product can be given a grainy metallic luster with various variations including fine irregularities.

Moreover, since the cavity surface of a metal mold | die is not engraved in the said structure, it becomes possible to change the texture aspect easily according to the decoration objective.
In the above configuration and the following description, for example, the term “above” is used, such as “on the undercoat layer” and “the upper surface of the undercoat layer”.
In order to clarify the stacking order of the layers constituting the decorative molded product, this is a term used for convenience on the assumption that the side of the product that is visible and touched is the “upper side”.

For the unevenness on the upper surface of the undercoat layer, an acrylic ultraviolet (UV) curable type in which crosslinked urethane beads or crosslinked acrylic beads having an average particle diameter of 6 to 50 micrometers are used as fine particles, and the fine particles are dispersed in the undercoat layer. This coating liquid is formed by UV curing in a state where it is applied to the surface of the molded product.

Cross-linked urethane beads or cross-linked acrylic beads have a spherical shape close to a true sphere, and those having an average particle diameter of 6 to 50 micrometers can be used as a commercial product. Can be.
The urethane fine particles can be uniformly dispersed without agglomeration in the acrylic undercoat by using an appropriate dispersant.

Another structure of the present invention, in the above-mentioned main constituent, pearl pigment in the top clear coat layer is Ru are dispersed, which called by Rukoto pearl pigment is dispersed in the top clear coat layer, the grain tone metallic luster And pearl-like color change combined, can give an unprecedented decoration effect.
Here, as the pearl pigment, a powdered material in which the surface of natural mica is coated with a high refractive index metal oxide such as titanium oxide or iron oxide (for example, trade name “Iriodin” manufactured by MERCK) can be used. .
Silica flakes whose surface is coated with a high refractive index metal oxide such as titanium oxide or iron oxide (for example, the product name “Color Stream” manufactured by MERCK) is also called a polarized pearl, and the color changes depending on the viewing angle. Visual effects are demonstrated.

  Still another configuration of the present invention is that, in the above main configuration, a transparent middle coat layer is laminated between the metal vapor deposition layer and the top clear coat layer.

As described above, when the pearl pigment is dispersed in the top clear coat layer to give a pearly color change to the metallic luster, the pearl pigment dispersed in the top clear coat layer is a metal depending on the kind of the pearl pigment. There is a risk that the metal vapor deposition layer may be partially altered by oxidation etc. due to contact with the vapor deposition layer, causing problems such as holes in the metal vapor deposition layer.
By laminating the middle coat layer as in the above configuration, it is possible to eliminate the contact between the pearl pigment and the metal vapor deposition layer and to prevent the problem of this type of metal vapor deposition layer corrosion.
In other words, by laminating the middle coat layer, the top clear coat layer can be selected appropriately with a high degree of freedom according to the purpose of decoration, including the above-mentioned pearl pigment without considering the alteration of the metal vapor deposition layer. Can be dispersed.
Furthermore, it is possible to disperse the middle coating layer with a pigment that is unlikely to change the quality of the metal vapor-deposited layer, and the middle coating layer and the top clear coating layer can provide a more varied decoration mode.

Still another configuration of the present invention is that, in the above configuration, the polarizing pigment is dispersed in the middle coat layer, and the pearl pigment is dispersed in the top clear coat layer.

A polarizing pigment that does not corrode the metal deposition layer is dispersed in the middle coat layer, and a pearl pigment is dispersed in the top clear coat layer, and the optical action effect of the polarizing pigment and the pearl pigment enhances the decoration. It becomes possible to impart sex.
Here, the polarizing pigment is a kind of metal oxide pigment (for example, “Ruminist” manufactured by Nippon Kores Co., Ltd.). Combined with the polarization color by the polarizing pigment and the color change of pearl tone, it is possible to give an unprecedented decoration effect.
Among the present invention, the main structure of the method for producing a decorative synthetic resin molded product is:
A method for producing a decorative synthetic resin molded product in which a grainy metallic luster appears on the surface of the molded product,
The surface of the molded product is cured by irradiating it with ultraviolet rays in a state where an acrylic ultraviolet curable coating liquid in which crosslinked urethane beads or crosslinked acrylic beads having an average particle diameter of 6 to 50 micrometers are dispersed as fine particles is applied. While laminating the coat layer, forming irregularities due to fine particles on the upper surface of the undercoat layer,
Next, a metal vapor deposition layer is laminated along the unevenness on the undercoat layer,
Furthermore, it has a step of laminating a top clear coat layer.
According to the above configuration, the fine particles dispersed in the undercoat layer have an average particle size of 6 to 50 micrometers, and the surface of the undercoat layer can be modified in various variations by adjusting the amount of fine particles dispersed. Since the metal vapor deposition layer, which is a thin film, is directly laminated along this unevenness without passing through another layer, the uneven shape formed on the upper surface of the undercoat layer is faithful. In addition, it is succeeded by the unevenness of the metal vapor-deposited layer, and the surface of the molded product can be given a grainy metallic luster with various variations including fine unevenness.
Moreover, since the cavity surface of a metal mold | die is not engraved in the said structure, it becomes possible to change the texture aspect easily according to the decoration objective.
Cross-linked urethane beads and cross-linked acrylic beads have a spherical shape close to a true sphere, and those having an average particle diameter of 6 to 50 micrometers can be used as commercial products. It can be of high quality. The urethane fine particles can be uniformly dispersed without agglomeration in the acrylic undercoat by using an appropriate dispersant.

Since the decorated synthetic resin molded product and the manufacturing method thereof according to the present invention have the above-described configuration, the following effects are exhibited.
That is, in what has the main structure of this invention, as a microparticles | fine-particles disperse | distributed to an acryl-type ultraviolet curing type undercoat layer, the average particle diameter uses a crosslinked urethane bead or a crosslinked acrylic bead of 6-50 micrometers. and, the upper surface in different variations of the undercoat layer by adjusting the dispersion of the fine particles, it is possible to form irregularities on the graining shape, without passing through other layers along the irregularities, directly, thin film Since the metal vapor deposition layer is laminated, the irregular shape formed on the upper surface of the undercoat layer is faithfully inherited by the metal vapor deposition layer irregularities, and the surface of the molded product can be changed in various variations including fine irregularities. A grainy metallic luster can be imparted.
Moreover, since the cavity surface of a metal mold | die is not engraved in the said structure, the aspect of an embossing can be easily changed according to the decoration objective.

It is sectional drawing which shows the laminated structure about one Example of the decorative molded product of this invention. It is the microscope picture which observed the uneven | corrugated state of the surface of the decorative molded product of FIG. It is sectional drawing which shows the laminated structure about the other Example of the decorative molded product of this invention. It is sectional drawing which shows the laminated structure about the prior art example of the molded product decorated with the metal vapor deposition layer.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of the invention will be described with reference to the accompanying drawings.
FIG. 1 is a cross-sectional view showing a laminated structure of an example of a decorative synthetic resin molded product of the present invention, and this layer structure is a molded product 1 / undercoat layer 2 / from the bottom to the top in the drawing. The metal vapor deposition layer 3 / the top clear coat layer 5 are laminated in this order.
Here, the undercoat layer 2 is for firmly holding the adhesion between the surface of the molded product 1 and the metal vapor deposition layer 3, and the top clear coat layer 5 is scratched, peeled off, corroded, etc. Demonstrate the function to prevent.

Hereinafter, the details of the layer structure including the formation process will be described.
The undercoat layer 2 is formed from an acrylic UV curable coating liquid in which crosslinked urethane beads having an average particle diameter of 15 micrometers (for example, urethane beads C-400 manufactured by Negami Kogyo Co., Ltd.) are dispersed as fine particles 2p. It was applied to the surface of the film and UV cured.
Then, after UV curing, as shown in FIG. 1, the unevenness P is formed by the fine particles 2p dispersed on the upper surface of the undercoat layer 2, and a dot-like grain pattern is formed as a whole.
Here, FIG. 2 is a microscopic photograph showing the unevenness state of the surface of the decorative molded article of FIG. 1, the maximum diameter is 70 convex shape of about micro meters is observed.

  Next, the metal vapor deposition layer 3 is laminated on the upper surface of the undercoat layer 2 on which the unevenness P is formed by a vapor deposition method using aluminum as a metal. The layer thickness of the metal vapor deposition layer 3 is 0.06. The shape of the unevenness P formed on the upper surface of the undercoat layer 2 is faithfully taken over by the unevenness of the metal deposition layer 3, and a grainy metallic luster appears on the surface of the molded product 1. Put out.

Finally, a top clear coat layer 5 that exhibits the function of preventing the metal vapor-deposited layer 3 from being scratched or peeled is laminated. This top clear coat layer 5 is an acrylic ultraviolet (UV) curable coating solution. Is applied to the surface of the molded article 1 and UV cured, and its layer thickness is about 5 to 10 micrometers.
Here, in this example, the top clear coat layer 5 has an uneven top surface. However, the top clear coat layer 5 has an uneven surface, which reduces reflection of light reflected on the top clear coat layer 5 surface. Like to do.

Here, although the layer structure shown in FIG. 1 shows the basic layer structure of the decorative synthetic resin molded product of the present invention, various variations of decoration are based on this basic layer structure. It can be set as an aspect.
For example, the following variations can be imparted by the top clear coat layer 5.
1) The top clear coat layer 5 is colored and transparent, and a metallic luster appears in the colored state.
2) A pearl pigment is dispersed in the top clear coat layer 5 to impart a pearly color change to the metallic luster.
3) A character and a pattern by a printing layer are added to the upper surface of the top clear coat layer 5.
4) A metal thin film layer having a mirror-like surface is partially laminated on the upper surface of the top clear coat layer 5 by a hot stamping method, and the mirror-like metal thin film layer is lifted in a grainy metallic luster background. Visual effects can be demonstrated.

FIG. 3 is a sectional view showing the laminated structure of another embodiment of the decorative molded product of the present invention, and this example is also one of variations based on the basic layer structure shown in FIG. In the basic configuration of FIG. 1, a transparent middle coat layer 4 is laminated between the metal vapor deposition layer 3 and the top clear coat layer 5.
For example, a pearl pigment by dispersing a pearl pigment in the top clear coat layer 5 as described above, if such as to impart a color change pearlescent metallic luster, depending on the type of pigment, dispersed in a top clear coat layer 5 May come into contact with the metal vapor deposition layer 3, and the metal vapor deposition layer 3 may be partially altered by oxidation or the like, resulting in problems such as holes in the metal vapor deposition layer 3.
In such a case, the middle coat layer 4 is laminated as shown in the layer configuration of FIG. 3, thereby eliminating the contact between the pearl pigment and the metal vapor deposition layer 3, thereby preventing the problem related to the alteration of the metal vapor deposition layer 3 of this type. be able to.

In addition, a polarizing pigment that does not corrode the metal deposition layer 3 is dispersed in the middle coat layer 4, and a pearl pigment is dispersed in the top clear coating layer 5, so that the embossed metal deposition layer 3, the polarizing pigment, and the polarization are dispersed. Higher decorative properties can be imparted by the optical effect of pearl.
More specifically, by combining the embossed metal vapor deposition layer 3 with a polarizing pigment and a pearl pigment, a pearl pigment having a relatively large particle size and a polarizing property is simulated as if applied on the metal vapor deposition layer. The undercoat layer 2 and the metal vapor deposition layer 3 can give a glittering feeling (coarse and glittering feeling), the middle coating layer 4 polarizing pigment and the top clear coating layer 5 pearl pigment, depending on the viewing angle and color. By combining changing colors, subtle and complex color effects appear.

As mentioned above, although the structure of this invention and its effect were demonstrated along the Example, the decorative synthetic resin molded product of this invention is not limited to these Examples, According to a use purpose or a decoration purpose. As described above based on the basic layer structure shown in FIG. 1, various variations can be made.
Moreover, it does not specifically limit about the shaping | molding method of a molded article, a shape, and the synthetic resin to be used, According to the intended purpose, an appropriate thing can be selected.

As for the fine particles to be used, the fine particles composed of a crosslinked organic resin such as crosslinked urethane beads and crosslinked acrylic beads used in the above examples are spherical shapes close to true spheres, and the average particle diameter is in the range of 6 to 50 micrometers. Products having a relatively uniform particle size can be used as commercial products, and products with various surface treatments are also prepared, and the dispersibility in the coating liquid is also good.
In addition, if the particle size of the fine particles is too small, it is difficult to sufficiently display a grain-like metallic luster. On the other hand, in a normal undercoat layer in which fine particles are not dispersed, the layer thickness is about 5 to 10 micrometers. If the particle size is too large, the function as an undercoat layer that maintains the adhesion between the surface of the molded product and the metal vapor deposition film may be impaired. It is preferable to set it as the range of about ~ 15 micrometers.
In addition to crosslinked organic resins, inorganic fine particles such as silica, mica, calcium carbonate, magnesium carbonate, titanium oxide, inorganic particles surface-treated with acrylic resins, polyurethane resins, surfactants, etc. can also be crosslinked urethane beads or Can be used with cross-linked acrylic beads .
For the undercoat layer , an acrylic UV curable coating solution is used. For the middle coat layer and the top clear coat layer, a urethane type, acrylic type, epoxy type or other curable type coating solution should be used as appropriate. Can do.

Moreover, the metal vapor deposition layer 3 does not necessarily need to be laminated | stacked on the whole area | region of a molded article, It can also be laminated | stacked only on a predetermined | prescribed area | region, The above-mentioned additional printing layer and the metal by a hot stamp method By combining the regions where the foil film layers are laminated, various decorative properties can be exhibited.

As described above, the decorative synthetic resin molded product of the present invention imparts a grain-like metallic luster with various variations by metal vapor deposition on the surface of the molded product without applying a texture to the cavity surface of the mold. As a result, a high level of decorative effect is exhibited, and a wide range of usage development in the cosmetic container field is expected.

1, 101; Substrate (molded product)
2, 102; undercoat layer 2p; fine particles 3, 103; metal deposition layer 4; middle coat layer 5, 105; top clear coat layer
P 1 , Pa, Pb; unevenness

Claims (5)

A synthetic resin in which an undercoat layer (2) is laminated on the surface of a molded article (1), a metal vapor deposition layer (3) is laminated on the undercoat layer (2), and a top clear coat layer (5) is further laminated. In the molded product, the undercoat layer (2) is made of an acrylic ultraviolet curable type in which crosslinked urethane beads or crosslinked acrylic beads having an average particle diameter of 6 to 50 micrometers are dispersed as fine particles (2p). ) To form an unevenness on the upper surface of the undercoat layer (2), and the metal vapor deposition layer (3) laminated along the unevenness causes a grainy metallic luster to appear on the surface of the molded product. Decorative synthetic resin molded product.
Top clear coat layer (5) dispersing the pearl pigment according to claim 1 Symbol placement of decorative synthetic resin molded article. The decorative synthetic resin molded article according to claim 1 or 2 , wherein a middle coat layer (4) having transparency is laminated between the metal vapor-deposited layer (3) and the top clear coat layer (5). The decorative synthetic resin molded article according to claim 3 , wherein a polarizing pigment is dispersed in the middle coat layer (4) and a pearl pigment is dispersed in the top clear coat layer (5). A method for producing a decorative synthetic resin molded product in which a grainy metallic luster appears on the surface of the molded product,
Ultraviolet rays are applied to the surface of the molded article (1) in a state where an acrylic UV-curable coating solution in which crosslinked urethane beads having an average particle diameter of 6 to 50 micrometers or crosslinked acrylic beads are dispersed as fine particles (2p) is applied. Irradiation and curing and laminating an undercoat layer (2), and forming irregularities due to the fine particles (2p) on the upper surface of the undercoat layer (2),
Next, a decorative synthetic resin molded product comprising a step of laminating a metal vapor deposition layer (3) along the unevenness on the undercoat layer (2) and further laminating a top clear coat layer (5). Manufacturing method.