JP5458424B2 - Metal-like molded product and transfer film used therefor - Google Patents

Description

The present invention relates to a molded article having both metallic luster and insulating properties, and a transfer film used therefor.

Conventionally, a molded product in which a high refractive index thin film layer and a metal thin film layer having a total light transmittance of 60% or less are at least laminated is known.
In Patent Document 1, an at least one surface of a transparent substrate is an adhesive layer, an iris layer in which a metal thin film layer having a total light transmittance of 30 to 60%, a resin layer, and a high refractive index thin film layer are sequentially formed, a protective layer An iris color molded product in which a release layer is sequentially formed is described.
Patent Document 2 discloses an iris in which an adhesive layer, a metal thin film layer having a total light transmittance of 3% to less than 30%, a resin layer, and a high refractive index thin film layer are sequentially formed on at least one surface of a transparent substrate. An iris color molded article in which a layer, a protective layer, and a release layer are sequentially formed is described.
Further, in both Patent Documents 1 and 2, the refractive index of the high refractive index thin film layer is preferably 1.8 to 2.5, and the refractive index of the resin layer is preferably 1.3 to 1.6. Is also described.

However, the iris color molded product described in Patent Document 1 exhibits a so-called iris color in which the color of the transmitted light that passes through the iris color molded product and the color of the reflected light that is reflected by the iris layer both change depending on the viewing angle. It was a molded article, and it did not have metallic luster when viewed by reflection, not when viewed from transmission.
Hereinafter, the metallic luster in the present specification is not when the molded product is seen by transmission (when the visible light (transmitted light) transmitted through the molded product is seen) but when the molded product is seen by reflection. This refers to the metallic luster that appears in the visible light (reflected light) reflected by the molded product.
Further, in the iris molded product described in Patent Document 2, the color of the reflected light viewed from one side of the iris colored molded product (the side of the metal thin film layer having a total light transmittance of 3% or more and less than 30%) is halftone. Although exhibiting (thin) metallic luster, the color of the transmitted light and the color of the reflected light viewed from the other side are all exhibiting an iris color, and also have no metallic luster.
As described above, the iris color molded products described in Patent Documents 1 and 2 each have an iris layer formed of a metal thin film layer, a resin layer, and a high refractive index thin film layer with a total light transmittance of 60% or less, and an iris. By adjusting both the refractive index and thickness of the resin layer and the high-refractive-index thin film layer, an iris color was exhibited, so that it was not a molded article having only metallic luster.

In addition, the iris molded products described in Patent Documents 1 and 2 are both conductive and non-insulating because a metal thin film layer having a total light transmittance of 60% or less is formed. It was.

Furthermore, since the iris color molded article described in Patent Document 2 has a total light transmittance of 3% or more and less than 30% of the metal thin film layer, the wavelength of the near infrared ray (electromagnetic wave having a wavelength of about 700 to 2500 nm) is particularly large. The near infrared transmittance at 850 to 1000 nm (hereinafter referred to as the near infrared transmittance in the present invention) is less than 70%, the near infrared transmittance is poor, and a TV or remote controller equipped with a transmission / reception unit using near infrared communication is used. There has been a problem that it is difficult to use an iris-colored molded product for applications that require near-infrared transparency such as a housing.
In general, if the near-infrared transmittance is 70% or more, it can be practically used for a housing such as a television or a remote controller provided with a transmission / reception unit using near-infrared communication.

Conventionally, metal-like molded products having both metallic luster and insulating properties are known.
In Patent Document 3, a metal-deposited layer having a release layer, a protective layer, and an island-shaped structure having an island size of 200 mm (20 nm) to 1 [mu] m and an island spacing of 100 to 5000 mm (10 to 500 nm) on one side of a substrate. An insulating transfer material is described in which a metal thin film layer) and an adhesive layer are sequentially laminated.
The metal vapor deposition layer is made of one or more metals selected from tin (Sn), lead (Pb), zinc (Zn), and bismuth (Bi), and further, the metal vapor deposition layer is insulated as an island structure. It is described that it is optimal to set the light transmittance (visible light transmittance) of the metal vapor deposition layer in the range of 10 to 15% in order to achieve the property.
Further, a molded product (metal-finished molded product) having both metallic luster and insulating properties obtained by transferring the insulating transfer material onto the outer frame of a television is also described.

However, although the above-described conventional metal-molded product has both metallic luster and insulation, the visible light transmittance of the metal-deposited layer is in the range of 10 to 15%. The transmittance was naturally 15% or less.
Therefore, for example, the above-mentioned conventional metal-molded product is used in a housing of an audio product having a window for displaying characters on the liquid crystal display unit through the metal-molded product, and the characters on the liquid crystal display unit are used in the casing. Even if it tried to display through a metal-shaped molded product, since the visible light transmittance of the metal-shaped molded product was 15% or less, there was a problem that it was difficult to visually recognize characters and the like on the liquid crystal display part.
Furthermore, even if the conventional metal-molded product is used in a case such as a TV or a remote control provided with a transmission / reception unit using near infrared communication, and the remote control or the like is operated by the near infrared, Is made of the above metal, the near-infrared transmittance is 60% or less, and the remote control or the like does not operate due to near-infrared light, resulting in poor near-infrared transmittance.
For this reason, conventional metal-molded products can be used for applications that require visibility, such as housings for audio products that have windows that display liquid crystal display characters and the like through the metal-molded products, and near infrared rays. It has been difficult to use for applications that require near-infrared transparency, such as housings for televisions and remote controllers equipped with a transmission / reception unit using communication.

JP-A-2005-212339 JP-A-2005-231280 Japanese Patent Publication No. 3-25353

The present invention eliminates the above-mentioned drawbacks, and provides a molded article having both metallic luster and insulating properties, and a transfer film used therefor.

[1] In the present invention, at least a high refractive index thin film layer having a thickness of 40 to 80 nm and a refractive index of 1.8 to 2.5, and a transmittance adjusting layer having a visible light transmittance of 60% or less are sequentially formed. It is a metal-shaped molded product characterized by being formed.
[2] The present invention includes a protective layer, a high refractive index thin film layer having a thickness of 40 to 80 nm and a refractive index of 1.8 to 2.5, and a transmittance adjusting layer having a visible light transmittance of 60% or less. It is a metal-like molded product characterized by being formed sequentially.
[3] The present invention provides a transfer film used for producing the metal-molded article according to any one of the above [1] or [2], which is at least thick on a plastic film having releasability. The transfer film is characterized in that a high refractive index thin film layer having a thickness of 40 to 80 nm and a refractive index of 1.8 to 2.5 and an adhesive layer are sequentially formed.

As described above, the metal-formed product of the present invention has at least a high refractive index thin film layer having a thickness of 40 to 80 nm and a refractive index of 1.8 to 2.5, and a transmittance of 60% or less. Since the adjustment layer has a characteristic structure that is sequentially formed, the metal-shaped molded product of the present invention has metallic gloss due to the synergistic effect of the high refractive index thin film layer and the transmittance adjustment layer. .

Moreover, since the electroconductive metal thin film layer is not formed, it has insulation.

Furthermore, for the purpose of protecting the high refractive index thin film layer from scratches or the like, if a protective layer is formed on the side opposite to the surface on which the transmittance adjusting layer of the high refractive index thin film layer is formed, high refractive index If the protective thin film layer can be further protected, and the protective layer is colored to provide a layer having high design properties, the metal-molded product of the present invention can be further improved in design properties.

Moreover, if the visible light transmittance of the transmittance adjusting layer or the protective layer is adjusted and the visible light transmittance of the metal-shaped molded product of the present invention is set to a range of more than 15% to 60% or less, the metal-shaped molded product of the present invention. Even when the metal-molded product of the present invention is used in a housing of an audio product having a window portion that displays characters on the liquid crystal display unit through the metal-molded product, it has excellent visibility. In addition, since the characters on the liquid crystal display part can be sufficiently visually recognized through the metal-molded product of the present invention, it can be used practically in applications requiring visibility such as the housing of audio products equipped with the window part. It becomes possible.

Further, by adjusting the near-infrared transmittance of layers other than the high refractive index thin film layer having a near-infrared transmittance of 70% or more (transmittance adjusting layer and protective layer), If the infrared transmittance is set to 70% or more, the metal-molded product of the present invention has excellent near-infrared transmittance, and the metal-molded product of the present invention is a television equipped with a transmission / reception unit using near-infrared communication. Even when used in a housing such as a remote controller, the remote controller or the like operates without problems with near infrared rays, so that it can be used practically without problems even in applications that require near infrared transparency.

The transfer film of the present invention in which at least a high refractive index thin film layer having a thickness of 40 to 80 nm and a refractive index of 1.8 to 2.5 and an adhesive layer are sequentially formed on a plastic film having releasability. Is optimal in terms of productivity and the like for producing the metal-finished molded article of the present invention.

As described above, the metal-molded product of the present invention has at least a high refractive index thin film layer having a thickness of 40 to 80 nm and a refractive index of 1.8 to 2.5, and a visible light transmittance of 60% or less. The transmittance adjusting layer is sequentially formed.
That is, the metal-molded article of the present invention includes at least a transparent high-refractive-index thin film layer having a specific refractive index and a specific thickness and having no metallic luster, and a transmittance adjusting layer having a specific visible light transmittance. By stacking at least the high refractive index thin film layer and the transmittance adjusting layer without forming a metal thin film layer, the metal gloss and insulation are combined. It is the present invention that a molded product having both metallic luster and insulation can be obtained.

As described above, at least the high refractive index thin film layer and the transmittance adjusting layer are sequentially formed, and the metal-shaped molded product of the present invention has a synergistic effect between the high refractive index thin film layer and the transmittance adjusting layer. It has metallic luster.
And this metallic luster is basically the high refractive index thin film layer side (when the protective layer is formed on the side opposite to the surface where the transmittance adjusting layer of the high refractive index thin film layer is formed). Appears when viewed from either the protective layer side or the transmittance adjustment layer side.
However, if the visible light transmittance of the transmittance adjusting layer is too low, for example, when the visible light transmittance of the transmittance adjusting layer is 0%, the metal-shaped molded product of the present invention is placed on the high refractive index thin film layer side. When viewed from (or the protective layer side), the metallic gloss appears, but when viewed from the transmittance adjusting layer side, the metallic gloss may not appear at all or may be difficult to reveal.
Therefore, it is preferable that the visible light transmittance of the transmittance adjusting layer is set to 30% or more so that the metallic luster appears reliably when viewed from the transmittance adjusting layer side.
If metallic gloss appears when viewed from either the high refractive index thin film layer side (or protective layer side) or the transmittance adjusting layer side, the metallic gloss is adjusted for transmittance. When viewed from the high refractive index thin film layer side (or the protective layer side), the metallic gloss appears stronger than when viewed from the layer side.

The high-refractive-index thin film layer formed on the metal-molded product of the present invention is basically a transparent layer having no metallic luster and has an insulating property.
Further, the high refractive index thin film layer is a layer having a near infrared transmittance of 70% or more and an excellent near infrared transmittance in the range of a thickness of 40 to 80 nm and a refractive index of 1.8 to 2.5. is there.
Furthermore, in addition to the insulating property and the near-infrared transmittance, a metallic gloss is imparted to the metal-like molded product of the present invention by a synergistic effect with the transmittance adjusting layer described in detail later.

The high refractive index thin film layer has a thickness in the range of 40 to 80 nm and a refractive index of 1.8 to 2 in order to achieve the object of imparting metallic luster to the metal-finished molded product of the present invention. Must be in the range of .5.
If the thickness and refractive index are not within the above ranges, the metal-tone molded product of the present invention may not have metallic luster or may exhibit an iris color, which is not preferable.

The high refractive index thin film layer is not particularly limited as long as it has excellent insulating properties and near-infrared transmittance, and can achieve the object of the present invention. Zinc sulfide (ZnS) thin film layer, zinc oxide (ZnOx) thin film layer Inorganic compound thin film layers such as titanium oxide (TiOx) thin film layer, cerium oxide (CeOx) thin film layer, zirconium oxide (ZrOx) thin film layer, silicon oxide (SiOx (x <2)) thin film layer, acrylic resin, polyester resin A resin thin film in which inorganic fine particles made of zinc oxide (ZnOx), titanium oxide (TiOx), cerium oxide CeOx, zirconium oxide (ZrOx), silicon oxide (SiOx (x <2)), etc. are mixed in a resin such as an epoxy resin. Layer can be used.
In particular, if the high refractive index thin film layer is a ZnS thin film layer, the refractive index is as high as about 2.4. Therefore, the metal-shaped molded product of the present invention has a synergistic effect between the high refractive index thin film layer and the transmittance adjusting layer. A certain metallic luster is more likely to appear, and the near-infrared transmittance is excellent, which is preferable.

When the high refractive index thin film layer is an inorganic compound thin film layer, a conventionally known vapor deposition method such as a vacuum vapor deposition method, a sputtering vapor deposition method or a CVD method can be used. In this case, conventionally known coating methods such as gravure coating, reverse coating, die coating, and screen printing can be used.

The transmittance adjusting layer formed on the metal-molded article of the present invention is a layer having a visible light transmittance of 60% or less.
The transmittance adjusting layer may be a single layer composed of only one layer or a plurality of layers in which two or more layers are stacked.
In the case of a plurality of layers, it is not necessary that all the layers constituting the transmittance adjusting layer have a visible light transmittance of 60% or less, and the visible light transmittance as a whole of the transmittance adjusting layer is 60%. The following is sufficient.
As the transmittance adjustment layer, a layer having various functions can be used as long as the visible light transmittance is 60% or less as a whole. For example, a transparent substrate made of plastic or the like, a transparent resin layer made only of resin, adhesiveness A transparent adhesive layer made of a resin having a coloring material, a colored base material in which a coloring agent such as a dye or a pigment is mixed, a colored resin layer, a colored adhesive layer, and the like are appropriately formed into a single layer or a plurality of layers.

Here, the specific configuration of the metal-finished product of the present invention including the relationship with the protective layer, the high refractive index thin film layer, and the transmittance adjusting layer is exemplified below.

(A) High refractive index thin film layer / transmittance adjusting layer (colored substrate)
(B) High refractive index thin film layer / transmittance adjusting layer (transparent adhesive layer / colored substrate)
(C) High refractive index thin film layer / transmittance adjusting layer (colored adhesive layer / transparent substrate)
(D) High refractive index thin film layer / transmittance adjusting layer (transparent resin layer / transparent adhesive layer / colored substrate)
(E) High refractive index thin film layer / transmittance adjusting layer (colored resin layer / transparent adhesive layer / transparent substrate)
(F) High refractive index thin film layer / transmittance adjusting layer (colored resin layer / transparent adhesive layer / colored substrate)
(G) Protective layer (transparent resin layer) / high refractive index thin film layer / transmittance adjusting layer (transparent resin layer / transparent adhesive layer / colored substrate)
(H) Protective layer (transparent resin layer) / high refractive index thin film layer / transmittance adjusting layer (colored resin layer / transparent adhesive layer / transparent substrate)
(I) Protective layer (transparent substrate / transparent adhesive layer) / high refractive index thin film layer / transmittance adjusting layer (colored resin layer)
(J) Protective layer (transparent substrate / transparent adhesive layer) / high refractive index thin film layer / transmittance adjusting layer (transparent resin layer / colored resin layer)
(K) Protective layer (colored substrate / transparent adhesive layer) / high refractive index thin film layer / transmittance adjusting layer (colored resin layer)
(L) Protective layer (colored substrate / transparent adhesive layer) / high refractive index thin film layer / transmittance adjusting layer (transparent resin layer / colored resin layer)
(M) Protective layer (colored resin layer / transparent substrate / transparent adhesive layer) / high refractive index thin film layer / transmittance adjusting layer (colored resin layer)
(N) Protective layer (colored resin layer / transparent substrate / transparent adhesive layer) / high refractive index thin film layer / transmittance adjusting layer (transparent resin layer / colored resin layer)

As described above, the transmittance adjusting layer is a transparent base material, a colored base material, a transparent resin layer, a colored resin layer, a transparent adhesive layer, and a colored adhesive, except for a case of a single layer configuration of a colored base material or a colored resin layer. A plurality of layers can be formed by appropriately combining layers and the like.
In addition, as long as the object of the present invention can be achieved, as in configurations (G) to (N), each layer constituting the transmittance adjusting layer is used as a protective layer as a single layer or a plurality of layers appropriately combined. Of course it doesn't matter.
The protective layer basically serves to protect the high refractive index thin film layer from scratches, etc., but when a colored base material, colored resin layer, colored adhesive layer is formed on the protective layer, it will be described later. As described above, a variety of designs can be imparted by the metal-molded product of the present invention.
Furthermore, as long as the object of the present invention can be achieved, a high-refractive-index thin film layer, a transmittance adjusting layer, and a protective layer may be formed on the entire surface of the metal-shaped molded product of the present invention. It may be formed partially such as a pattern, or any of them may be formed on the entire surface, and any of them may be formed partially.
In the case where any one of them is partially formed, at least the position where the high refractive index thin film layer and the transmittance adjusting layer overlap has the effect of the present invention. .
Which layer is formed on the entire surface or partially formed may be appropriately determined according to a desired purpose and design.

Next, the metallic luster that appears due to the synergistic effect of the high refractive index thin film layer and the transmittance adjusting layer will be described in detail.
As described above, in the present invention, the metallic gloss appears due to the synergistic effect of the high refractive index thin film layer and the transmittance adjusting layer. At this time, the color of the transmittance adjusting layer (a plurality of transmittance adjusting layers are formed). In this case, the visible color of the transmittance adjusting layer is a relatively flat color as in the case where the color appearing as the entire transmittance adjusting layer is a blackish color such as black or smoke. In this case, the color of the transmittance adjusting layer is inconspicuous, and the metal-tone molded product of the present invention has only a so-called metallic gloss.
However, when the transmittance adjustment layer color is blue, yellow, red, etc., the visible light transmission spectrum of the transmittance adjustment layer is not flat and is a color that transmits visible light of a specific wavelength. The color of the transmittance adjusting layer such as blue, yellow and red is combined with the metallic luster, and the metallic luster colored in blue, yellow and red appears.
Thus, the colored metallic luster is also included in the metallic luster referred to in the present invention.

In addition, when the protective layer is formed on the side opposite to the surface where the transmittance adjusting layer of the high refractive index thin film layer is formed and the protective layer is colored, the high refractive index thin film layer and the transmittance The metallic luster that appears due to the synergistic effect with the adjustment layer and the color of the colored protective layer combine to produce a variety of colored metallic luster.
At this time, when the color of the transmittance adjusting layer formed by forming a colored resin layer, a colored adhesive layer, or the like and adjusting the visible light transmittance to 60% or less is black or smoked color, the high refractive index thin film layer and the transparent layer are transmitted. A metallic luster due to a synergistic effect with the rate adjusting layer and a colored metallic luster that combines the colors of the protective layer appear.
And when the color of the transmittance adjusting layer is blue, yellow, red, etc., the metallic luster colored in blue, yellow, red, etc. due to the synergistic effect of the high refractive index thin film layer and the transmittance adjusting layer In addition, combined with the color of the protective layer, a more variety of colored metallic luster appears.
When the protective layer is a colored protective layer as described above, the visible light transmittance of the protective layer is preferably more than 60%.

Next, each layer formed in the transmittance adjusting layer will be described in detail including the case where it is formed in the protective layer.
As a base material formed in the metal-molded article of the present invention, an acrylic resin, polycarbonate resin, polypropylene resin, acrylonitrile / butadiene / styrene copolymer resin (ABS resin), plastic made of resin such as polyolefin resin, glass, etc. The transparent base material which consists of this, and the colored base material which mixed the coloring agent in this transparent base material can be used.

The base material used for the metal molded product of the present invention basically serves as a support for the metal molded product of the present invention.
Furthermore, in the case where the base material is a colored base material and is formed as one of the layers constituting the transmittance adjustment layer of the metal-molded article of the present invention, in addition to the above role, the visible light of the transmittance adjustment layer As a layer for adjusting the transmittance to 60% or less, it plays a role of imparting metallic luster to the metal molded product of the present invention by a synergistic effect with the high refractive index thin film layer, and the metal of the metal molded product of the present invention It also plays a role of imparting colored metallic luster in which the gloss and the color of the colored substrate are combined.

Further, when the substrate is formed as one of the layers constituting the protective layer, the protective layer protects the high refractive index thin film layer from scratches and the like as a support for the metal-molded article of the present invention As described above, when the base material is a colored base material, as described above, it was formed as a metallic luster and protective layer that appeared due to the synergistic effect of the high refractive index thin film layer and the transmittance adjusting layer. Together with the color of the colored substrate, it also plays the role of imparting colored metallic luster.

As above-mentioned, a base material becomes a support body of the metal-formation molded article of this invention, The shape can use various shapes including plate shape.
And since it is common to use a base material that is usually a support that does not have flexibility, the shape of the base material directly becomes the shape of the metal-molded product of the present invention, and the shape is maintained. Is done.
However, when the base material is a flexible base material in the form of a sheet such as a plastic film, naturally the metal-molded product of the present invention using the flexible base material is also flexible. It will have.
And what laminated | stacked the metal-form molded product of this invention which has such flexibility further on the base material of the various shapes which do not have flexibility separately is also contained in the metal-form molded product of this invention.
The type, shape, thickness of the substrate, whether the substrate is a transparent substrate or a colored substrate, the color, coloring degree (color density), visible light transmittance, What is necessary is just to determine a near-infrared transmittance etc. suitably according to a desired objective and design.

The transparent resin layer formed in the metal-finished product of the present invention is a layer made of a transparent resin.
The colored resin layer is a colored resin layer in which a colorant such as a dye or pigment is mixed into the same resin as that used for the transparent resin layer.
When the transparent resin layer and the colored resin layer are formed on the transmittance adjusting layer and the protective layer, in any case, the adhesion with the transparent resin layer or the layer in contact with the colored resin layer is improved, or the transparent resin layer or It plays a role of protecting the layer in contact with the colored resin layer from scratches and the like.
At this time, it is preferable to use a resin having excellent hard coat properties as the resin used for the transparent resin layer or the colored resin layer because the layer in contact with the transparent resin layer or the colored resin layer can be further protected.

As an example in which the transparent resin layer and the colored resin layer are formed, the configurations (D) to (N) of the metal-molded product of the present invention can be given.
As the resin used for the transparent resin layer, resins such as acrylic resin, polyester resin, epoxy resin, and olefin resin can be used.
What is necessary is just to determine suitably about the kind of resin, the thickness of a transparent resin layer, etc. according to a desired objective and design.

The role of the colored resin layer is the same as that of the colored substrate when formed as one of the layers constituting the transmittance adjusting layer of the metal-molded article of the present invention in addition to the above-mentioned role of the transparent resin layer. The layer for adjusting the visible light transmittance of the transmittance adjusting layer to 60% or less plays a role of imparting metallic luster to the metal-molded product of the present invention by a synergistic effect with the high refractive index thin film layer.
Further, when formed as one of the layers constituting the protective layer, as described above, the metallic gloss and the colored resin layer appear due to the synergistic effect of the high refractive index thin film layer and the transmittance adjusting layer. It also plays the role of a colored metallic luster with a mixture of colors.
What is necessary is just to determine suitably about the kind of resin to be used, the kind of coloring agent, the mixing amount with respect to resin, the thickness of a colored resin layer, etc. according to a desired objective and design.

The transparent adhesive layer is made of a transparent adhesive resin used for adhesives, pressure-sensitive adhesives, etc., and has a role of adhering the layer in contact with the transparent adhesive layer, and in particular, a role of adhering the base material and other layers. To fulfill.
As the resin used for the transparent adhesive layer, there can be used resins used for conventionally known adhesives and pressure-sensitive adhesives, such as adhesive acrylic resins, polyester resins, vinyl chloride resins, and vinyl chloride vinyl acetate copolymer resins.

The colored adhesive layer is a colored adhesive layer in which a colorant such as a dye or a pigment is mixed in the same resin as the adhesive resin used for the transparent adhesive layer.
The role of the colored adhesive layer plays the same role as the colored resin layer in terms of metal gloss in addition to the role of the transparent adhesive layer.
What is necessary is just to determine suitably about the kind of resin to be used, the kind of coloring agent, the mixing amount with respect to resin, the thickness of a color adhesion layer, etc. according to a desired objective and design.

The metal-molded article of the present invention has a transparent high-refractive-index thin film layer having a thickness of 40 to 80 nm and a refractive index of 1.8 to 2.5 and having no metallic gloss, and a visible light transmittance of 60. %, The synergistic effect results in a metallic luster. Therefore, the transmissivity adjusting layer basically includes a layer having a metallic luster, such as visible light. A metal thin film layer having a transmittance of 60% or less is not formed.
If a metal thin film layer having a metallic luster with a visible light transmittance of 60% or less is formed, the metal-molded product of the present invention not only has an insulating property but also exhibits an iris color. Since it may be, it is not preferable.
Accordingly, if the metal-molded product of the present invention is within a range where the object of the present invention can be achieved, such as insulation, for example, a metal thin film layer having a visible light transmittance of more than 60% or an island-shaped metal thin film layer over the entire surface. Of course, it may be partially formed.

Similarly to the above, the protective layer may be formed of a metal thin film layer having a visible light transmittance of more than 60%, for example, as long as the metal-formed product of the present invention can achieve the object of the present invention, such as insulation. Of course, it is possible to form the island-shaped metal thin film layer entirely or partially.

Moreover, if the visible light transmittance of the transmittance adjusting layer or the protective layer is adjusted and the visible light transmittance of the metal-shaped molded product of the present invention is set to a range of more than 15% to 60% or less, the metal-shaped molded product of the present invention. Even when the metal-molded product of the present invention is used in a housing of an audio product having a window portion that displays characters on the liquid crystal display unit through the metal-molded product, it has excellent visibility. In addition, since the characters on the liquid crystal display part can be sufficiently visually recognized through the metal-molded product of the present invention, it can be used practically in applications requiring visibility such as the housing of audio products equipped with the window part. It becomes possible.
Note that the protective layer is transparent even when the metal-molded article of the present invention is composed of only a high refractive index thin film layer and a transmittance adjusting layer, or when a protective layer is further formed. In some cases, there is not much difference between the visible light transmittance of the transmittance adjusting layer and the visible light transmittance of the metal-molded product of the present invention.
Therefore, if at least the visible light transmittance of the transmittance adjusting layer is in the range of 20 to 60%, the high refractive index thin film layer and the transparent protective layer transmit the transmitted light that transmits the metal-shaped molded product of the present invention to some extent. Therefore, the visible light transmittance of the metal-molded product of the present invention is in the range of more than 15% and 60% or less, and the metal-molded product of the present invention is excellent in visibility in addition to metallic luster and insulation. Therefore, it is preferable.
However, when the visible light transmittance of the transmittance adjusting layer is less than 20%, the visible light transmittance of the metal-molded product of the present invention may be 15% or less, and characters and the like on the liquid crystal display portion may be reduced. Since there may be a case where it cannot be sufficiently visually recognized or not at all through the metal-molded article of the present invention, it may be difficult to use in applications that require visibility.
Therefore, in order to make the metal-molded product of the present invention usable for applications that require visibility, it is preferable to set at least the visible light transmittance of the transmittance adjusting layer to 20 to 60%.

Further, by adjusting the near-infrared transmittance of the transmittance adjusting layer and the near-infrared transmittance of the protective layer, if the near-infrared transmittance of the metal-shaped molded product of the present invention is set to 70% or more, the metallic tone of the present invention is adjusted. Even if the molded product has excellent near-infrared transmittance, and the metal-molded product of the present invention is used for a housing such as a TV or a remote control equipped with a transmission / reception unit using near-infrared communication, the near-infrared As a result, the remote controller or the like operates without any problem, so that it can be used practically without problems even in applications that require near infrared transmission.
In this case, the metal-finished molded product of the present invention has both metallic luster, insulating properties, and near infrared transmittance.

Furthermore, if the visible light transmittance of the metal-shaped product of the present invention is more than 15% to 60% or less and the near-infrared transmittance of the metal-shaped product of the present invention is 70% or more, the metal of the present invention The molded product has both metallic luster, insulation, visibility, and near-infrared transparency, and is used for both applications that require visibility and near-infrared transparency. It can be used for applications.

In order to produce the metal-formed product of the present invention, a high refractive index thin film layer, a transparent resin layer, a colored resin layer, a transparent adhesive layer, a colored adhesive layer, and the like are appropriately combined and supported according to the desired purpose and design. What is necessary is just to laminate | stack directly on the single side | surface of the base material which is a body, or both surfaces.
The method for forming the high refractive index thin film layer, the transparent resin layer, the colored resin layer, the transparent adhesive layer, the colored adhesive layer, and the like is as described above.
However, in order to produce the metal molded product of the present invention, the layers constituting the metal molded product of the present invention, all the layers other than the substrate, or a part of the layers are released. From the viewpoint of productivity, it is preferable to use the transfer film of the present invention laminated in advance on a plastic film having the properties to transfer it onto a substrate.
At this time, in the case of producing the metal-molded product of the present invention by using the transfer film of the present invention in which a part of the layer is previously laminated on a releasable plastic film, the remaining part of the layer Need to be formed separately by some method.
In this case, the remaining part of the layer is directly formed by the above-described method, or a transfer film in which the part of the remaining part is laminated on the plastic film having releasability is separately manufactured. The method of forming by using and transferring is mentioned.
As the transfer method, a conventionally known transfer method such as a hot roll transfer method or an in-mold transfer method can be used.

The transfer film of the present invention has at least a high refractive index thin film layer having a thickness of 40 to 80 nm and a refractive index of 1.8 to 2.5, and an adhesive layer on a plastic film having releasability. It must be formed sequentially.
The configuration of the transfer film of the present invention may be appropriately determined depending on the desired configuration of the metal molded product of the present invention, but the relationship between the configuration of the transfer film of the present invention and the configuration of the metal molded product of the present invention is specifically described. An example is given below.

Specifically, the structure of the transfer film of the present invention for producing the metal molded article of the present invention having the above configurations (B) to (N), and the metal molded article of the structures (B) to (N) As shown in the following (B ′) to (N ′), the configuration of the state in which the transfer film of the present invention is bonded to the substrate is illustrated.
And if the plastic film which has mold release property from the following structure is peeled, it will become the metal-tone molded product of this invention.
As for the configuration (A), a method of directly forming a high refractive index thin film layer directly on a colored substrate which is a transmittance adjusting layer by a vapor deposition method or the like is general, and since it is simple, the transfer of the present invention Omitted from the specific example of production using film.
(B ′) Transfer film (Plastic film having releasability / High refractive index thin film layer / Transparent adhesive layer) / Colored substrate (C ′) Transfer film (Plastic film having releasability / High refractive index thin film layer / Colored adhesive layer) / Transparent substrate (D ′) Transfer film (Plastic film having releasability / High refractive index thin film layer / Transparent resin layer / Transparent adhesive layer) / Colored substrate (E ′) Transfer film (Release) Plastic film / high refractive index thin film layer / colored resin layer / transparent adhesive layer) / transparent substrate (F ′) transfer film (plastic film having releasability / high refractive index thin film layer / colored resin layer / transparent) Adhesive layer) / colored substrate (G ′) transfer film (plastic film having releasability / transparent resin layer / high refractive index thin film layer / transparent resin layer / transparent adhesive layer) / colored substrate (H ′) transfer film (With releasability Plastic film / transparent resin layer / high refractive index thin film layer / colored resin layer / transparent adhesive layer) / transparent substrate (I ′) transparent substrate / transfer film (transparent adhesive layer / high refractive index thin film layer / colored resin layer / (Releasable plastic film)
(J ') Transparent substrate / transfer film (transparent adhesive layer / high refractive index thin film layer / transparent resin layer / colored resin layer / plastic film having releasability)
(K ') Colored substrate / transfer film (transparent adhesive layer / high refractive index thin film layer / colored resin layer / plastic film having releasability)
(L ') Colored substrate / transfer film (transparent adhesive layer / high refractive index thin film layer / transparent resin layer / colored resin layer / plastic film having releasability)
(M ') Colored resin layer / transparent substrate / transfer film (transparent adhesive layer / high refractive index thin film layer / colored resin layer / plastic film having releasability)
(N ') Colored resin layer / transparent substrate / transfer film (transparent adhesive layer / high refractive index thin film layer / transparent resin layer / colored resin layer / plastic film having releasability)

As the high refractive index thin film layer, the transparent resin layer, the colored resin layer, the transparent adhesive layer, and the colored adhesive layer formed on the transfer film of the present invention, each layer described in the metal-molded article of the present invention can be used as it is.

The above-mentioned plastic film having releasability is peeled from the metal-molded product of the present invention after each layer (transfer layer) formed on the plastic film having releasability is transferred to a substrate. It is.
As the plastic film used for the releasable plastic film, a plastic film used in a conventionally known transfer film such as a polyethylene terephthalate film, a polypropylene film, a polyethylene film, an acrylic film, or a vinyl chloride film can be used.

Moreover, you may give uneven | corrugated processes, such as a hairline process and embossing, to the plastic film which has releasability, and what gave such an uneven | corrugated process is also contained in the plastic film which has the releasability of this invention .
By applying the concavo-convex processing, the metal-like molded product of the present invention produced using the transfer film of the present invention has a metallic gloss of concavo-convex tone such as hairline tone, embossed tone, etc. It will be rich.

In addition, for the purpose of improving mold releasability, an epoxy melamine that adheres to the plastic film on the plastic film (or on the concave / convex processed surface when the concave / convex processing is performed) and peels off at the interface with the transfer layer. You may form the mold release layer which consists of resin, such as resin and acrylic melamine resin.
Thus, what formed the mold release layer on the plastic film is also contained in the plastic film which has the mold release property said by this invention.
Incidentally, when the transfer film of the present invention is transferred, even if there is a case where the transfer layer does not peel at the interface of the release layer and a part of the release layer is transferred and formed on the transfer layer surface, There is no problem when it does not affect the effect of the metal molded product of the present invention, and there are also those in which a release layer is formed in a very small part of the layer constituting the metal molded product of the present invention. And included in the metal-finished molded article of the present invention.
The type and thickness of the plastic film and the type and thickness of the resin used for the release layer may be appropriately determined according to the desired purpose.

Conventional methods such as gravure coating method, reverse coating method, die coating method, screen printing method, etc. have been used for forming transparent resin layers, colored resin layers, transparent adhesive layers, colored adhesive layers and the like formed on a releasable plastic film. Known coating methods can be used.
In addition, when the high refractive index thin film layer is an inorganic compound thin film layer, a conventionally known vapor deposition method such as a vacuum vapor deposition method, a sputtering vapor deposition method, a CVD method or the like can be used. In the case of a thin film layer, conventionally known coating methods such as a gravure coating method, a reverse coating method, a die coating method, and a screen printing method can be used.

[Example 1]
(Manufacture of transfer film)
A transparent resin layer (1) having a thickness of 1 μm made of acrylic resin is formed on the entire surface of a 25 μm thick polyethylene terephthalate film with a hairline processed on one side by a gravure coating method. ) A transparent resin layer (2) having a thickness of 1 μm made of acrylic urethane resin is formed on the entire surface by gravure coating, and a high refractive index thin film layer having a thickness of 55 nm is formed on the transparent resin layer (2) by vacuum deposition. A ZnS thin film layer is formed on the entire surface, and a 1.5 μm thick transparent adhesive layer made of an acrylic resin is formed on the entire surface of the ZnS thin film layer by a reverse coating method to form a releasable plastic film (polyethylene terephthalate). Film) / transparent resin layer (1) / transparent resin layer (2) / high refractive index thin film layer (ZnS thin film layer) / transparent adhesive layer Transfer was obtained film of the bright.

(Manufacture of metal-like molded products)
The transparent adhesive layer side of the transfer film of the present invention obtained in Example 1 on the surface of a 2 mm thick smoked acrylic plate (visible light transmittance: 25%, near infrared transmittance: 90%), which is a colored substrate. After being transferred to a hot roll so as to be in contact with each other, the release film (polyethylene terephthalate film) having a releasability is peeled off, and [protective layer (transparent resin layer (1) / transparent resin layer (2))] / [ High-refractive index thin film layer (ZnS thin film layer)] / [transmittance adjustment layer (transparent adhesive layer / colored substrate (smoked acrylic plate))] audio front casing (visible light transmittance: 22%, near infrared transmission) The metal-like molded product of the present invention having a rate of 82%) was obtained.
The above layers are all formed on the entire surface of the colored substrate (smoked acrylic plate).
In addition, the visible light transmittance of the transmittance adjusting layer (transparent adhesive layer / colored base material (smoked acrylic plate)) in the audio front casing which is the metal-like molded product of the present invention was 25%.
The audio front case has insulating properties and has a hairline-like metallic luster when viewed from the front side (transparent resin layer (1) side), but the back side (smoked acrylic plate side) When seen from the above, it did not have a metallic luster of a hairline tone.
Furthermore, when characters and the like on the liquid crystal display unit provided on the rear rear side of the audio front case were viewed from the front side through the audio front case, the characters and the like were clearly visible and excellent in visibility.
Furthermore, when the operability of the receiver of the remote control provided behind the audio front case was confirmed, it operated without any problems and was excellent in near infrared transmission.

[Example 2]
(Manufacture of transfer film)
A transparent resin layer (1) having a thickness of 1 μm made of acrylic resin is formed on the entire surface of a 25 μm thick polyethylene terephthalate film with a hairline processed on one side by a gravure coating method. ) A transparent resin layer (2) having a thickness of 1 μm made of acrylic urethane resin is formed on the entire surface by gravure coating, and a high refractive index thin film layer having a thickness of 55 nm is formed on the transparent resin layer (2) by vacuum deposition. A ZnS thin film layer is formed on the entire surface, a blue colored resin layer having a thickness of 1 μm made of an acrylic resin and a blue dye is formed on the entire surface of the ZnS thin film layer by a gravure coating method, and further a reverse coating is applied on the colored resin layer. A transparent adhesive layer made of acrylic resin and having a thickness of 1.5 μm is formed on the entire surface by a plastic film (polyethylene terrestrial film) having releasability. A transfer film of the present invention comprising: (phthalate film) / transparent resin layer (1) / transparent resin layer (2) / high refractive index thin film layer (ZnS thin film layer) / blue colored resin layer / transparent adhesive layer was obtained.

(Manufacture of metal-like molded products)
The transparent adhesive layer side of the transfer film of the present invention obtained in Example 2 is placed on the surface of a transparent polycarbonate plate (visible light transmittance: 90%, near infrared transmittance: 90%), which is a transparent substrate. After heat roll transfer so as to be in contact, the plastic film (polyethylene terephthalate film) having releasability is peeled off, and [protective layer (transparent resin layer (1) / transparent resin layer (2))] / [high Audio front casing (visible light transmittance: 48) comprising [refractive index thin film layer (ZnS thin film layer)] / [transmittance adjusting layer (blue colored resin layer / transparent adhesive layer / transparent substrate (transparent polycarbonate plate))]. % Near-infrared transmittance: 80%).
The above layers are all formed on the entire surface of the transparent substrate (transparent polycarbonate plate).
In addition, the visible light transmittance of the transmittance adjusting layer (blue colored resin layer / transparent adhesive layer / transparent substrate (transparent polycarbonate plate)) in the audio front casing which is the metal-like molded product of the present invention is 51%. there were.
The audio front case has an insulating property, and has a metallic luster and a colored resin layer both when viewed from the front side (transparent resin layer (1) side) and from the back side (transparent polycarbonate plate side). The product had a blue metallic luster with a hairline tone combined with the blue color of.
In addition, the blue metallic luster of the hairline tone appeared more strongly when viewed from the front side than when viewed from the back side.
Furthermore, when characters and the like on the liquid crystal display unit provided on the rear rear side of the audio front case were viewed from the front side through the audio front case, the characters and the like were clearly visible and excellent in visibility.
Furthermore, when the operability of the receiver of the remote control provided behind the audio front case was confirmed, it operated without any problems and was excellent in near infrared transmission.

[Example 3]
(Manufacture of transfer film)
A 1 μm thick transparent resin layer (1) made of acrylic resin is formed on the entire surface of a 25 μm thick polyethylene terephthalate film by gravure coating, and acrylic urethane resin is formed on the transparent resin layer (1) by gravure coating. A red colored resin layer with a thickness of 1 μm composed of a red dye and a transparent resin layer (2) with a thickness of 1 μm composed of an acrylic urethane resin is formed on the entire surface of the colored resin layer by gravure coating. A ZnS thin film layer, which is a high refractive index thin film layer having a thickness of 55 nm, is formed on the entire surface of the transparent resin layer (2) by vacuum vapor deposition, and further, a thickness 1 made of acrylic resin is formed on the ZnS thin film layer by reverse coating. A 5 μm transparent adhesive layer is formed on the entire surface, and a releasable plastic film (polyethylene terephthalate film / transparent resin layer (1 )) / Red colored resin layer / transparent resin layer (2) / high refractive index thin film layer (ZnS thin film layer) / transparent adhesive layer.

(Manufacture of metal-like molded products)
The transparent adhesive layer side of the transfer film of the present invention obtained in Example 3 is placed on the surface of a transparent polycarbonate plate (visible light transmittance: 90%, near infrared transmittance: 90%), which is a transparent substrate. After heat roll transfer so as to be in contact, a plastic film (polyethylene terephthalate film) having releasability was peeled off. Thereafter, on the transparent resin layer (1), a black colored resin layer (visible light transmittance: 0%) having a thickness of 10 μm made of an acrylic resin and a black pigment is further formed in a pattern by screen printing. [Transmissivity adjustment layer (black colored resin layer (pattern) / transparent resin layer (1) / red colored resin layer / transparent resin layer (2))] / [high refractive index thin film layer (ZnS thin film layer)] / [Metal-molded article of the present invention which is an audio front casing (visible light transmittance: 53%, near infrared transmittance: 80%) comprising [protective layer (transparent adhesive layer / transparent polycarbonate plate (transparent substrate))] Got.
Each of the above layers is formed on the entire surface of the transparent substrate (transparent polycarbonate plate) except for the black colored resin layer formed in a pattern.
In addition, the transmittance adjustment layer (black colored resin layer (pattern) / transparent resin layer (1) / red colored resin layer / transparent resin layer) in the audio front casing which is the metal-like molded product of the present invention. Among them, the visible light transmittance of the portion where the black colored resin layer was not formed (laminated portion of transparent resin layer (1) / red colored resin layer / transparent resin layer) was 57%.
The audio front housing has an insulating property, and the portion where the black colored resin layer is not formed is the back side (transparent resin layer (1) side) when viewed from the front side (transparent polycarbonate plate side). ) Also has a red metallic luster that combines the metallic luster and the red color of the colored resin layer, and the portion where the black colored resin layer is formed is seen from the front side. When it had a black-brown metallic luster in which the metallic luster and the colors of the red colored resin layer and the black colored resin layer were mixed, from the side where the black colored resin layer was formed When viewed, it was only black and had no metallic luster.
In addition, about the part in which the black colored resin layer is not formed, the said black-brown metallic luster appeared more strongly when seen from the front side than when seen from the back side.
Further, when characters or the like of a liquid crystal display portion provided on the back side of the portion where the black colored resin layer of the audio front casing is not formed are viewed from the front side through the audio front casing, the letters or the like are clearly displayed. It was visible and excellent in visibility.
Furthermore, when the remote control receiver provided on the back side of the audio front housing where the black colored resin layer is not formed, the operability of the remote control receiver was confirmed, and the near infrared transmission was excellent. It was.

Claims (3)

  At least a high refractive index thin film layer having a thickness of 40 to 80 nm and a refractive index of 1.8 to 2.5, and a transmittance adjusting layer having a visible light transmittance of 60% or less are sequentially formed. Metal-like molded product. A protective layer, a high refractive index thin film layer having a thickness of 40 to 80 nm and a refractive index of 1.8 to 2.5, and a transmittance adjusting layer having a visible light transmittance of 60% or less are sequentially formed. Characteristic metal-molded product.   A transfer film used for producing a metal-molded article according to claim 1, wherein the transfer film is at least 40 to 80 nm in thickness and has a refractive index of 1 on a plastic film having releasability. A transfer film, wherein a thin film layer having a high refractive index of 8 to 2.5 and an adhesive layer are sequentially formed.