JP2001347539A - Decorated molding capable of being backlighted and decorated thin product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a decorated molding capable of being backlighted and exhibiting a design to be obscured by assimilating a pattern on a transparent part to a light shield part of a circumference in a state in which the pattern of the light shield is not illuminated with a light source from behind though the pattern of the light shield comes out when the pattern is illuminated with the light source from behind and a decorated thin product. SOLUTION: The decorated molding capable of being backlighted is integrated at the translucent surface with an insert film or a transfer layer and the molding having one or more translucent parts and the light shields adjacent to the translucent part comprises a specific laminated constitution and optical conditions at least at one peripheral area of the translucent part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative thin product such as a decorative molded product or a game card used for an automobile component, a button or a housing of a telephone, an input component of an electric appliance, etc. The present invention relates to a design in which a pattern of a translucent portion emerges when illuminated by a light source from behind, but in a state where the pattern is not illuminated from behind by a light source, the pattern assimilates with a surrounding light-shielding portion, so that its existence cannot be recognized.

[0002]

2. Description of the Related Art Conventionally, as a decorative molded product which can be backlit and used for automobile parts, telephone buttons and housings, input parts of electric appliances, etc., an insert film or a molded product having a transfer layer having a light-transmitting layer. Some have a light-transmitting portion having a pattern shape such as a character or a figure and a light-shielding portion around the light-transmitting portion by being integrated with the surface. When this decorative molded product is illuminated from behind by a light source, only the light transmitting portion transmits light, and the pattern shape of the light transmitting portion is clearly recognized.

[0003]

However, in the case of a conventional decorative molded product, the color of the light-transmitting portion indicates how much attention can be drawn when illuminated by a light source from behind.
The color of the light-shielding part is determined only based on whether the difference in the meaning of the display due to the difference in color can be expressed, while the color of the light-transmitting part is based only on how beautiful the decoration can be applied. Determined independently.

[0004] Therefore, even when the light-transmitting portion and the light-shielding portion are different in color even when not illuminated from behind by a light source, the existence of the pattern of the light-transmitting portion itself can be recognized. As a result, in a product that does not require the function of recognizing the pattern of the light-transmitting portion in a state where the pattern is not illuminated from behind, the design is deteriorated.

[0005] In addition, in the case of decorative thin materials such as game cards and the like, a hologram pattern has been conventionally devised to enhance the design, but further improvement in the design is desired.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problem. When illuminated by a light source from behind, the pattern of the translucent portion emerges, but when the pattern is not illuminated by the light source from behind, the pattern does not. An object of the present invention is to provide a decorative molded product and a decorative thin product which can be illuminated with a surrounding light-shielding portion and exhibit a design whose presence is not understood.

[0007]

In order to achieve the above object, a decorative molded product capable of being backlit according to the present invention comprises:
The decorative molded article in which the insert film or the transfer layer is integrated with the surface of the translucent molded article and has at least one translucent portion and the light shielding portion adjacent to the translucent portion has at least one translucent shape. In the peripheral region, a light-shielding layer formed only in the light-shielding portion, a colored light-transmitting layer formed in at least the light-transmitting portion is sequentially laminated on the surface of the light-transmitting molded product from the viewing side, and The color difference ΔE and JIS K when the chromaticity is measured from the viewing side in the L ^* a ^* b ^* color system of the CIE (International Commission on Illumination) 1976 for the light transmitting part and the light shielding part in the above area.
The value X ₁ (%) of the light transmittance of all the layers including the molded article located in the light-transmitting portion in the above-described region measured in 7105, and the light transmission of all the layers including the molded article located in the light-shielding portion in the above-described region. Regarding the maximum value X ₂ (%) of the ratio, the following relational expressions (1) to (3) hold, and when there is a portion where the colored translucent layer is not formed in the light-shielding portion in the region, the relational expression (1) 4) was established. ΔE ≦ 50 (1) 3 ≦ X ₁ <70 (2) 4X ₂ ≦ X ₁ (3) X ₂ ≦ 10 (4)

[0008] In the decorative molded product capable of backlighting according to the present invention, the insert film or the transfer layer is integrated with the surface of the translucent molded product, and at least one translucent portion and the translucent portion are provided. A decorative molded product having an adjacent light shielding portion,
In at least one light-transmitting portion peripheral region, a colored light-transmitting layer formed on the light-transmitting portion and the light-shielding portion, and a light-shielding layer formed only on the light-shielding portion are sequentially laminated on the surface of the light-transmitting molded product from the viewer side. And the relations (1) to (3) may be satisfied.

[0009] In each arrangement, the decorated molded article may be those relations 10X ₂ ≦ X ₁ is satisfied.

[0010] The decorative thin material capable of backlighting according to the present invention comprises a decorative thin material having at least one light-transmitting portion and a light-shielding portion adjacent to the light-transmitting portion. In the peripheral region, a light-shielding layer formed only in the light-shielding portion, and at least a colored light-transmitting layer formed in the light-transmitting portion are sequentially laminated from the viewing side, and the light-transmitting portion and the light-shielding portion in the above region are formed. Department of LIE ^* a ^* of CIE (International Commission on Illumination) 1976
b ^* Color difference ΔE when chromaticity is measured from the viewing side in the color system, the value X ₁ (%) of the light transmittance of all the layers located in the light transmitting portion within the above-mentioned region measured according to JIS K 7105
And the maximum value X ₂ (%) of the light transmittance of all the layers located in the light-shielding portion in the above-described region, the following relational expressions (1) to (2).
If (3) is satisfied, and if there is a portion where the colored light-transmitting layer is not formed in the light-shielding portion in the above-described region, the configuration is such that the relational expression (4) is satisfied. ΔE ≦ 50 (1) 3 ≦ X ₁ <70 (2) 4X ₂ ≦ X ₁ (3) X ₂ ≦ 10 (4)

[0011] In addition, the decorative thin sheet which can be backlit according to the present invention comprises a decorative thin sheet having at least one light transmitting portion and a light shielding portion adjacent to the light transmitting portion. In the light-portion peripheral region, a colored light-transmitting layer formed on the light-transmitting portion and the light-shielding portion, and a light-shielding layer formed only on the light-shielding portion are sequentially laminated from the viewer side, and the relational expression (1) )
To (3) may be satisfied.

[0012] In each arrangement, the decorative thin like material, may be one relationship 10X ₂ ≦ X ₁ is satisfied.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings.

First, the decorative molded product which can be backlit according to the present invention will be described.

In the decorative molded product capable of backlighting according to the present invention, the insert film or the transfer layer is integrated with the surface of the translucent molded product, and one or more translucent portions are adjacent to the translucent portion. The decorative molded article having the light-shielding portion has a specific laminated structure and optical conditions in at least one light-transmitting portion peripheral region.

The insert film 5 is a light-transmitting molded product 4
The decorative molded product 7 integrated on the surface (see FIGS. 1 to 4 and FIGS. 6 to 9) has one or more light transmitting portions 1 and the light shielding portion 2 adjacent to the light transmitting portion 1. Place the insert film in the injection mold, close the mold, and inject the translucent molding resin into the cavity to form the translucent molded product and adhere the insert film to the surface at the same time Then, it can be obtained while maintaining the laminated state. Also,
The decorative molded product 7 (see FIGS. 5 and 10) in which the transfer layer 6 is integrated with the surface of the translucent molded product 4 has one or more translucent portions 1 and the translucent portion on one surface of the base sheet. Shading part 2 adjacent to 1
After bonding a transfer material having a transfer layer having the same as the insert film to the surface of the molded product at the same time as the insert film,
When the transfer material formed on the surface of the molded article is taken out of the mold or after taking out, the base sheet can be peeled off.

The shape of the molded product 4 includes a flat plate shape and a three-dimensional shape. Examples of the resin of the molded article 4 include acrylic resin, acrylonitrile styrene resin, styrene resin, polycarbonate resin, acrylonitrile butadiene styrene resin, silicone resin, nylon resin, urethane resin, thermoplastic elastomer resin, polyethylene resin, and polypropylene resin. Also, a light-transmitting material is used.

Normally, the light-transmitting portion 1 forms a pattern such as a character or a figure by being bordered by the light-shielding portion 2, and only the light-transmitting portion 1 transmits light while being illuminated from behind by a light source. To display the pattern (FIGS. 20, 21 and 2).
3, FIG. 24).

The laminated structure of the decorative molded product 7 includes a light-shielding layer 9 formed only on the light-shielding portion 2 in the above-described region on the surface of the light-transmissive molded product 4 in at least one light-transmitting portion peripheral region a. There is a structure in which the colored light-transmitting layers 8 formed in at least the light-transmitting portion 1 in the above-described region are sequentially laminated from the viewing side (Configuration I: see FIGS. Note that a part of the light-transmitting portion peripheral region a
When the above-mentioned laminated structure is adopted, the above-mentioned laminated structure is not naturally adopted in the remaining light-transmitting portion peripheral region a, and therefore, the following description is made in the above-mentioned region.
The viewing side is the side opposite to the side on which the light source of the decorative molded product 7 is arranged.

When the decorative molded product 7 is an insert molded product, the insert film 5 has the following layer structure in a region corresponding to the above-described region, that is, the above-described region on one side of the translucent base sheet 10. The light-shielding layer 9 is formed only in the portion corresponding to the light-shielding portion 2, and the colored light-transmitting layer 8 is formed in at least the portion corresponding to the light-transmitting portion 1 in the above region.
It is most preferable that the base sheet 10 is integrated with the translucent molded product 4 so that the base sheet 10 is closest to the viewing side (see FIG. 1). The reason that it is preferable to make the base sheet 10 closest to the viewing side is that the base sheet 1
This is because 0 protects the light-shielding layer 9, so that it is possible to prevent the light-shielding layer 9 from peeling off due to long-term wear and leaking light.

As the translucent base sheet 10, a resin sheet such as a polypropylene resin, a polyethylene resin, a polyamide resin, a polyester resin, an acrylic resin, and a polyvinyl chloride resin can be used.

The light-shielding layer 9 is made of a vinyl chloride-vinyl acetate resin, a polyamide resin, a chlorinated polypropylene resin, an epoxy resin, a cyanoacrylate resin, a polyester resin, an acrylic resin, a polyurethane resin, a polyvinyl acetal resin. It is preferable to use a light-shielding ink containing a resin such as a resin, a polyester urethane-based resin, a cellulose ester-based resin, or an alkyd resin as a binder and a metal pigment, an inorganic pigment, or a dye having a hiding property as a coloring agent. Examples of the method for forming the layer made of the light-shielding ink include an offset printing method, a gravure printing method,
A normal printing method such as a screen printing method may be used. Further, the light-shielding layer 9 may be formed by forming two or more layers of a light-shielding ink. The light-shielding layer 9 may be formed by combining a layer made of a light-shielding ink and a metal thin film layer having a shielding property. The metal thin film layer is formed by vacuum evaporation, sputtering,
Formed to a thickness exceeding 0.04 μm by ion plating, plating, etc., according to the metallic luster color to be expressed,
Aluminum, nickel, gold, platinum, chromium, iron, copper,
Use metals such as tin, indium, silver, titanium, lead, zinc, and their alloys or compounds. When the metal thin film layer is provided, an anchor layer may be provided in order to improve the adhesion of the metal thin film layer.

The colored light transmitting layer 8 is made of vinyl chloride-vinyl acetate resin, polyamide resin, chlorinated polypropylene resin, epoxy resin, cyanoacrylate resin, polyester resin, acrylic resin, polyurethane resin, polyvinyl resin. It is preferable to use a translucent ink containing a resin such as an acetal-based resin, a polyester urethane-based resin, a cellulose ester-based resin, or an alkyd resin as a binder and a translucent metal pigment, an inorganic pigment, or a dye as a colorant. . As a method for forming the layer made of the translucent ink, a normal printing method such as an offset printing method, a gravure printing method, and a screen printing method may be used. Alternatively, two or more layers made of a translucent ink may be formed to form the colored translucent layer 8. The colored light-transmitting layer 8 may be formed by combining a layer made of a light-transmitting ink and a light-transmitting metal thin film layer. The translucent metal thin film layer is formed to a thickness of 0.005 to 0.04 μm by vacuum evaporation, sputtering, ion plating, plating, etc. to increase the translucency, and the metallic luster to be expressed Aluminum, according to color
Metals such as nickel, gold, platinum, chromium, iron, copper, tin, indium, silver, titanium, lead, and zinc, and alloys or compounds thereof are used. When a light-transmitting metal thin film layer is provided, an anchor layer may be provided in order to improve the adhesion of the metal thin film layer.

The light-shielding property of the light-shielding layer 9 made of ink and the light-transmitting property of the colored light-transmitting layer 8 made of ink depend on the degree of light-shielding and light-transmitting properties of the colorant itself and the content of the colorant. Decided. Therefore, the light-shielding layer 9 made of ink and the colored translucent layer 8 made of ink are (1) when the content is changed with the same colorant, (2) when different colorants are used, and (3) differently. The content may vary depending on the colorant.

In the case where the decorative molded product 7 is an insert molded product, the base sheet 10 does not have to be the side closest to the viewing side unless abrasion resistance to the light shielding layer 9 is required. For example, the insert film 5 having the following layer configuration for the region corresponding to the above-described region, that is, the above-described structure is formed only at the portion corresponding to the light-shielding portion 2 in the region on one surface of the translucent base sheet 10. A light-shielding layer 9 is formed, and a colored light-transmitting layer 8 as described above is formed at least at a position corresponding to the light-transmitting portion 1 in the area on the other surface of the base sheet 10. It may be integrated with the translucent molded product 4 so as to be closest to the side (see FIG. 2). Alternatively, the insert film 5 has the following layer configuration in a region corresponding to the above-mentioned region, that is, the insert film 5 is provided on at least a portion corresponding to the light-transmitting portion 1 in the region on one surface of the light-transmitting base sheet 10. The above-described colored light-transmitting layer 8 is formed, and the above-described light-shielding layer 9 is formed only at a position corresponding to the light-shielding portion 2 in the region, and the light-shielding layer 9 is closest to the viewing side. It may be integrated with the translucent molded product 4 so as to be on the side (see FIG. 3).

When the decorative molded product 7 is an insert molded product, the insert film 5 has a layer structure in which a region corresponding to the above region is used as a colored light transmitting layer and a base sheet as follows. That is, the colored translucent / substrate sheet 11 which is a translucent and colored resin sheet
A light-shielding layer 8 is formed only at a position corresponding to the light-shielding portion 2 in the above-mentioned area on one surface.
May be integrated with the light-transmitting molded product 4 so that is closer to the viewing side (see FIG. 4). In this case, the thickness of the colored translucent / substrate sheet is often considerably larger than that of the colored translucent layer. Need to be lower than

When the decorative molded article 7 is a transfer molded article, a transfer material having the following layer structure in a region corresponding to the above-mentioned region, that is, a release layer 13 is provided on one surface of the base sheet 12 is provided. The light-shielding layer 9 as described above is formed only on the portion corresponding to the light-shielding portion 2 in the above-described region, and the above-described light-shielding layer 9 is formed on at least the portion corresponding to the light-transmitting portion 1 in the above-described region. After the base sheet is integrated with the light-transmitting molded product 4 so that the base sheet is closest to the viewer side, the base sheet 12 is peeled off and the transfer layer 6 is formed. Only (see FIG. 5). Examples of the material of the release layer 13 include polyacrylic resin, polyester resin, polyvinyl chloride resin, cellulose resin, rubber resin, polyurethane resin, polyvinyl acetate resin, and the like. It is preferable to use a copolymer such as a polymer resin or an ethylene-vinyl acetate copolymer resin. When hardness is required for the release layer 13,
It is preferable to select and use a photocurable resin such as an ultraviolet curable resin, a radiation curable resin such as an electron beam curable resin, or a thermosetting resin. As a method for forming the release layer 13, a normal printing method such as an offset printing method, a gravure printing method, or a screen printing method may be used. Further, the base sheet 12 used for the transfer material does not need to be translucent because it does not remain in the decorative molded product 7. In addition to the various resin sheets that can be used for the insert film 5 described above, aluminum Foil, metal foil such as copper foil, glassine paper,
What is used as a base sheet of an ordinary transfer material, such as a coated paper, a cellulosic sheet such as cellophane, or a composite of the above sheets can be used.

Further, an adhesive layer is formed between the light-shielding layer and the colored light-transmitting layer of the insert film 5 and the molded article 4 or between the light-shielding layer and the colored light-transmitting layer of the transfer layer 6 and the molded article 4. (Not shown). As the adhesive layer, a heat-sensitive or pressure-sensitive resin suitable for the material of the molded article 4 is appropriately used. For example, when the molded article 4 is an acrylic resin or a urethane resin, it is preferable to use a vinyl chloride-vinyl acetate copolymer resin or an acrylic resin as the adhesive layer. As a method for forming the adhesive layer, an offset printing method, a gravure printing method,
A normal printing method such as a screen printing method may be used.

The insert film 5 may have a light-transmitting backing sheet in addition to the base sheet 10 and the colored light-transmitting / base sheet 11 (not shown). Transparent backing sheets include polyester resin, nylon resin, silicone resin, polyurethane resin, acrylonitrile butadiene styrene resin, polycarbonate resin,
Resins such as polystyrene resin, acrylonitrile styrene resin, and polypropylene resin can be used. By doing so, the stiffness is imparted to the entire sheet, and it is difficult for the sheet to lose its shape. This has the effect of facilitating the vacuum molding of the insert and the sheet into the mold. The resin sheet may be transparent or translucent.

As described above, in at least one light-transmitting portion peripheral region a, the light-shielding layer 9 formed only on the light-shielding portion 2 in the above-described region on the surface of the light-transmitting molded product 4 from the viewing side, When the decorative molded product is divided into the light-transmitting portion 1 and the light-shielding portion 2 by sequentially laminating at least the colored light-transmitting layers formed in the light-transmitting portion 2 (see FIGS. 1 to 5), The light transmitting part 1 and the light shielding part 2
(International Commission on Illumination) Color difference ΔE when measuring chromaticity from the viewing side in L ^* a ^* b ^* color system of 1976, JIS
The value X ₁ (%) of the light transmittance of all layers including the molded product located in the light transmitting portion 1 in the above-described region measured in K 7105
The following relational expressions (1) to (3) are applied to the maximum value X ₂ (%) of the light transmittance of all the layers including the molded product located in the light-shielding portion 2 in the region, When there is a portion where the colored translucent layer is not formed, the relational expression (4) needs to be satisfied in addition. ΔE ≦ 50 (1) 3 ≦ X ₁ <70 (2) 4X ₂ ≦ X ₁ (3) X ₂ ≦ 10 (4)

The chromaticity in the L ^* a ^* b ^* color system of the CIE1976 is specifically measured as follows (see FIG. 27). That is, using a measuring instrument such as a colorimeter, the measuring head 31
And measure the chromaticity. In the drawing, reference numeral 30 denotes a measuring device main body, and 32 denotes a group. The chromaticity is represented by a stimulus value of L ^* a ^* b ^* color system, and a ₁ ^* ,
b ₁ ^* , L ₁ ^* data and a ₂ ^* , b ₂
^* , L ₂ ^* data are taken, and the stimulus value difference of each chromaticity is calculated. That is, Δa ^* = a ₁ ^* −a ₂ ^* , Δb ^{*
_{= B 1 * -b 2 *,}} ΔL * = L 1 * -L obtain ^{2 *.}
The color difference ΔE is calculated by applying these values to the color difference equation below.

[0032]

(Equation 1)

In the above measurement results, the adjacent light-transmitting portions 2 and 3 having a color difference ΔE of less than 50 basically have the same color as the light-transmitting portion without being irradiated with light from the light source. The existence of the second pattern is erased and recognized.
As a result, the present invention can be applied to a display object that does not need to be displayed in daylight and needs to be displayed at night, or can be applied to a display object that is displayed or hidden by turning on / off a light source. However, when the value X ₁ of the light transmittance of all layers comprising the molded article 4 for alignment with a light transmitting portion 1 in the area measured in JIS K 7105 as an exception of 70 (%) or more, the light transmitting portion Even if ΔE ≦ 50 because the color depth of 1 is too light, it will not be assimilated. Therefore, in considering assimilation, relational expression (2) is important in addition to relational expression (1).

Further, when the value X ₁ of the full thickness light transmittance including a shaped article 4 located on the light transmitting portion 1 in the area measured in JIS K 7105 is not less than 3%, a much source There is a problem that the pattern of the light transmitting portion 1 does not stand out clearly even when illuminated. Also, JIS K71
Maximum value X ₂ of the light transmittance of all layers comprising the molded article 4 located on the light shielding portion 2 in the area is more than 1/4 of X ₁ measured at 05, so that stand out the pattern of the transparent portion 1 When the intensity of the light source is set to an appropriate value, there is a problem that light is leaked in the light shielding portion 2. More preferably, 10X ₂ ≦ X
_1. Further, when there is a portion where the colored light transmitting layer is not formed in the light shielding portion 2 in the above-mentioned region, unless X ₂ is 10% or less, the colored light transmitting portion is irradiated with the light from the light source. There is a problem that the boundary between the portion where the layer is not formed and the portion where the layer is formed is visible from the viewing side.

Further, as another laminated structure of the decorative molded product 7, at least one light-transmitting portion peripheral region a
On the surface of the light-transmitting molded article 4, the colored light-transmitting layer 15 formed on the light-transmitting portion 1 in the above-mentioned region and the light-shielding portion 2 in the above-mentioned region, and the light-shielding layer 14 formed only on the light-shielding portion 2 in the above-mentioned region Are sequentially laminated from the viewing side (Configuration II: see FIGS. 6 to 10). In the case where the above-mentioned laminated structure is adopted in some of the light-transmitting-portion peripheral regions a, the above-mentioned laminated structure is not naturally taken in the remaining light-transmitting-portion peripheral regions a (for example, the above-mentioned configuration I is also possible). The following description is for the above area.

In the case where the decorative molded product 7 is an insert molded product, the insert film 5 has the following layer structure in a region corresponding to the above-mentioned region, that is, the above-described region on one surface of the light-transmitting base sheet 16. The colored light-transmitting layer 15 is provided at a position corresponding to the light-transmitting portion 1 in the
And a light-transmitting molded product in which the light-shielding layer 14 is formed only at a position corresponding to the light-shielding portion 2 in the above-mentioned region, and the base sheet 16 is closest to the viewing side. Most preferably, it is integrated with No. 4 (see FIG. 6). The reason why the base sheet 16 is preferably the side closest to the viewing side is to obtain abrasion resistance to the light-shielding layer 14 as in the configuration I.

In the case where the decorative molded product 7 is an insert molded product, the base sheet 16 does not have to be the side closest to the viewing side unless abrasion resistance to the light shielding layer 14 is required. For example, the insert film 5 having the following layer configuration in a region corresponding to the above-described region, that is, the light-transmitting portion 1 in the region and the light-shielding portion 2 in the region on one surface of the light-transmitting base sheet 16 The colored translucent layer 15 as described above is formed at a location corresponding to
6 having the above-described light-shielding layer 14 formed only in the area corresponding to the light-shielding portion 2 in the above-mentioned area, and transmitting the colored light-transmitting layer 15 so as to be closest to the viewing side. It may be integrated with the molded article 4 having the property (see FIG. 7). Or,
The insert film 5 having the following layer structure in the region corresponding to the above-mentioned region, that is, the above-described light shielding only in the portion corresponding to the light shielding portion 2 in the above-mentioned region on one side of the translucent base sheet 16 A layer 14 is formed, and a colored light transmitting layer 15 as described above is formed on a portion corresponding to the light transmitting portion 1 in the region and the light shielding portion 2 in the region. It may be integrated with the translucent molded product 4 so that 15 is closest to the viewing side (see FIG. 8).

When the decorative molded product 7 is an insert molded product, the insert film 5 has a layer structure in which the colored translucent layer and the base sheet are also used in the region corresponding to the above region as follows. That is, the colored translucent / substrate sheet 17 which is a translucent and colored resin sheet
The light-shielding layer 14 as described above is formed only at the portion corresponding to the light-shielding portion 2 in the above-mentioned area on one surface, and the colored light-transmitting / substrate sheet 17 is transmitted so as to be closest to the viewing side. It may be integrated with the molded article 4 having the property (see FIG. 9). In this case, the thickness of the colored translucent / substrate sheet is often considerably larger than that of the colored translucent layer. Need to be lower than

When the decorative molded article 7 is a transfer molded article, a transfer material having the following layer structure in an area corresponding to the above area, that is, a release layer 19 is provided on one surface of the base sheet 18 is provided. A colored light transmitting layer 15 is formed on a portion corresponding to the light transmitting portion 1 in the above-described region and the light shielding portion 2 in the above region, and a portion corresponding to the light shielding portion 2 in the above region thereon Only the light-shielding layer 14 is formed, and the base sheet 18 is integrated with the light-transmitting molded product 4 so that the base sheet 18 is closest to the viewing side. Only (see FIG. 10).

Further, when the colored light transmitting layer 15 and the light shielding layer 14 are laminated from the viewer's side, an adhesive layer may be formed between the insert film 5 and the molded article 4 or between the transfer layer 6 and the molded article 4. Can be formed (not shown). Further, the insert film 5 may have a translucent backing sheet 29 in addition to the base sheet 16 and the colored translucent and base sheet 17 (see FIG. 22).

The colored light-transmitting layer 15 and the colored light-transmitting layer 1 in the decorative molded article 7 (Structure II) in which the colored light-transmitting layer 15 and the light-shielding layer 14 are sequentially laminated on the surface of the light-transmitting molded article 4 from the viewer side.
5, colored translucent and base sheet 17, release layer 19, adhesive layer,
The resin, colorant, metal material used in the base sheet 16, the backing 29 sheet, and the base sheet 18 of the transfer material used in the production of the decorative molded product, and the means for forming each layer are as described above. It can be the same as the decorative molded product 7 (configuration I) in which the light shielding layer 9 and the colored translucent layer 8 are laminated on the surface of the product 4 in this order from the viewing side.

As described above, in at least one light-transmitting portion peripheral region a, the light-transmitting portion 1 in the above-mentioned region and the light-shielding portion 2 in the above-mentioned region are formed on the surface of the light-transmitting molded product 4 from the viewing side. The decorative molded article 7 is divided into the light-transmitting portion 1 and the light-shielding portion 2 by sequentially laminating the colored light-transmitting layer 15 and the light-shielding layer 14 formed only on the light-shielding portion 2 in the above-mentioned region (FIGS. 6 to 6). In this case, the chromaticity of the light-transmitting portion 1 in the above-mentioned region and the light-shielding portion 2 in the above-mentioned region were measured from the viewer side in the L ^* a ^* b ^* color system of CIE (International Commission on Illumination) 1976. The color difference ΔE at the time, the value X ₁ (%) of the light transmittance of all layers including the molded article located in the light transmitting portion 1 in the above-mentioned region measured in JIS K 7105 and the light-shielding portion 2 in the above-mentioned region. Maximum value X of light transmittance of all layers including molded products
₂ (%), the following relational expressions (1) to (3) need to be satisfied. ΔE ≦ 50 (1) 3 ≦ X ₁ <70 (2) 4X ₂ ≦ X ₁ (3)

The reason why the relational expressions (1) to (3) need to be satisfied is the same as in the case of the configuration I. Also, as in the configuration I,
More preferably 10X ₂ ≦ _{X 1.} However, this configuration I
In the case of I, since there is no portion where the colored translucent layer is not formed in the light-shielding portion 2 in the above-described region (therefore, the light transmittance is the same everywhere in the light-shielding portion 2, and X2 is the light beam in the light-shielding portion 2). is also a minimum value and at the same time is the maximum value of the transmittance.), not formed of colored translucent layers at the light shielding part 2 when irradiated with light from a light source without limit X ₂ below 10 (%) The boundary between the part and the formed part is not seen from the viewing side. Therefore, in the present configuration II, the color of the light-shielding portion 2 is limited to only the colors that can be expressed by a very small part of the coloring agent (iron oxide brown, carbon black black, titanium oxide white, etc.) as in the configuration I. Never be.
For example, the light shielding portion 2 of the decorative molded product 7 can be made to have a metal deposition color, a metallic color, or a yellowish color.

Next, the decorative thin sheet which can be backlit according to the present invention will be described.

The decorative thin sheet which can be backlit according to the present invention is a decorative thin sheet 20 having at least one light transmitting portion and a light shielding portion adjacent to the light transmitting portion (see FIGS. 11 to 18). )But,
As in the decorative molded article 7, at least one light-transmitting portion peripheral region has a specific laminated structure and optical conditions.

The light-transmitting part 1 forms a pattern such as a character or a figure by being bordered by the light-shielding part 2, and only the light-transmitting part 1 transmits light while being illuminated by a light source from behind. The pattern is displayed (see FIGS. 25 and 26).

The laminated structure of the decorative thin material 20 is as follows.
In at least one light-transmitting portion peripheral region a, a light-shielding layer 21 formed only on the light-shielding portion 2 in the region from the viewing side,
There is a structure in which the colored translucent layers 22 formed at least in the translucent portion 1 in the above-described region are sequentially laminated (Configuration III: FIG. 11).
To FIG. 14). In the case where the above-mentioned laminated structure is adopted in a part of the light-transmitting portion peripheral region a, the above-mentioned laminated structure is of course not taken in the remaining light-transmitting portion peripheral region a. It is. Also,
The viewing side is a side opposite to the side on which the light source of the decorative thin object 20 is arranged at the time of viewing, and a certain light transmitting portion peripheral area a of the decorative thin material 20 and another transparent side. The side where the light source is disposed may be different from the light part peripheral area a.

More specifically, at least one light-transmitting portion peripheral region a has the following layer configuration, that is, the light-shielding portion 2 in the above-described region on one surface of the light-transmitting base sheet 23.
A light-shielding layer 21 is formed only at a portion corresponding to the light-transmitting portion 1, and a colored light-transmitting layer 22 is formed at least at a portion corresponding to the light-transmitting portion 1 in the above-mentioned region, to form a decorative sheet 20. It is visually recognized from the 23 side (see FIG. 11).

The translucent base sheet 23 includes polypropylene resin, polyethylene resin, polyamide resin, polyester resin, acrylic resin, polycarbonate resin, biodegradable resin, polystyrene resin, and cellulose resin. And a resin sheet such as a polyvinyl chloride resin.

The light-shielding layer 21 is made of a vinyl chloride-vinyl acetate resin, a polyamide resin, a chlorinated polypropylene resin, an epoxy resin, a cyanoacrylate resin, similarly to the light-shielding layers 9 and 14 of the decorative molded article 7. Using resins such as polyester resins, acrylic resins, polyurethane resins, polyvinyl acetal resins, polyester urethane resins, cellulose ester resins, and alkyd resins as binders, and coloring metal pigments, inorganic pigments, dyes, etc. with concealment properties It is good to form using the light-shielding ink contained as. As a method for forming the layer made of the light-shielding ink, a normal printing method such as an offset printing method, a gravure printing method, or a screen printing method may be used. Further, the light-shielding layer 21 may be formed by forming two or more layers of a light-shielding ink. The light-shielding layer 21 may be formed by combining a layer made of a light-shielding ink and a metal thin film layer having a hiding property. The metal thin film layer is formed with a thickness exceeding 0.04 μm by a vacuum deposition method, a sputtering method, an ion plating method, a plating method, etc., and according to a metallic luster color to be expressed, aluminum, nickel, gold, platinum, chromium. Use metals such as iron, copper, tin, indium, silver, titanium, lead, zinc, and alloys or compounds thereof. When the metal thin film layer is provided, an anchor layer may be provided in order to improve the adhesion of the metal thin film layer.

The colored light transmitting layer 22 is made of vinyl chloride-vinyl acetate resin, polyamide resin, chlorinated polypropylene resin, like the colored light transmitting layers 8 and 15 of the decorative molded product 7.
A translucent metal pigment using a resin such as an epoxy resin, a cyanoacrylate resin, a polyester resin, an acrylic resin, a polyurethane resin, a polyvinyl acetal resin, a polyester urethane resin, a cellulose ester resin, or an alkyd resin as a binder. It is preferable to use a light-transmitting ink containing an inorganic pigment, a dye, or the like as a colorant. As a method for forming the layer made of the translucent ink, a normal printing method such as an offset printing method, a gravure printing method, and a screen printing method may be used. Also,
The colored translucent layer 22 may be formed by forming two or more layers of translucent ink. The colored translucent layer 22 may be formed by combining a layer made of translucent ink and a translucent metal thin film layer.
The light-transmitting metal thin film layer is formed to have a thickness of 0.005 to 0.04 μm by a vacuum deposition method, a sputtering method, an ion plating method, a plating method, or the like so as to increase light transmission.
Aluminum, nickel, gold, platinum, chromium, iron, copper, tin, indium,
Metals such as silver, titanium, lead, and zinc, and alloys or compounds thereof are used. When a light-transmitting metal thin film layer is provided, an anchor layer may be provided in order to improve the adhesion of the metal thin film layer.

In the laminated structure of the decorative thin material 20, the base sheet 23 does not have to be the side closest to the viewing side. For example, at least one light-transmitting portion peripheral region a has the following layer configuration, that is, the above-described structure is formed only on a portion of one surface of the light-transmitting base sheet 23 corresponding to the light-shielding portion 2 in the above-described region. The light-shielding layer 21 may be formed, and the above-described colored light-transmitting layer 22 may be formed at least at a position corresponding to the light-transmitting portion 1 in the above-described area on the other surface of the base sheet 23 (see FIG. 12). ). Alternatively, the above-described colored layer having the following layer configuration, that is, the colored translucent layer 22 is formed on at least a portion corresponding to the translucent portion 1 in one side of the translucent base sheet 23 in the above-described area. Alternatively, the above-described light-shielding layer 21 may be formed only in a portion corresponding to the light-shielding portion 2 in the above-described region (see FIG. 13). Further, the laminated structure of the decorative thin material 20 has a layer structure in which the colored translucent layer 22 and the base sheet 23 are also used for the above-described region, that is, a translucent and colored resin. The above-described light-shielding layer 21 may be formed only at a portion corresponding to the light-shielding portion 2 in the above-described region on one surface of the colored translucent / substrate sheet 24 (see FIG. 14).

Further, a light-transmitting backing sheet may be provided in addition to the base sheet 23 and the colored light-transmitting / base sheet 24 (not shown). As the light-transmitting backing sheet, the same resin as that described in the configuration I can be used. By doing so, it is possible to obtain the effect that the strength of the waist is given, the resistance to the bending load is improved, and the decorative thin material is hardly deformed. The resin sheet may be transparent or translucent.

As described above, in at least one light-transmitting portion peripheral region a, the light-shielding layer 21 formed only on the light-shielding portion 2 in the above-mentioned region from the viewing side, and formed on at least the light-transmitting portion 1 in the above-mentioned region. When the decorative thin material is divided into the light-transmitting portion 1 and the light-shielding portion 2 by sequentially laminating the colored light-transmitting layers 22 (see FIGS. 11 to 14), the light-transmitting portion in the above-described region is viewed from the viewing side. Unit 1 and the light shielding unit 2 in the above area
(International Commission on Illumination) Color difference ΔE when measuring chromaticity in L ^* a ^* b ^* color system of 1976, JIS K7105
The value X ₁ (%) of the light transmittance of all the layers located in the light transmitting portion 1 in the above-described region and the maximum value X ₂ ( ₂ ) of the light transmittance of all the layers located in the light shielding portion 2 in the above-mentioned region measured in %), The following relational expressions (1) to (3), and the relational expression (4) must be satisfied in addition to the case where the colored light-transmitting layer is not formed in the light-shielding portion 2 in the region. ΔE ≦ 50 (1) 3 ≦ X ₁ <70 (2) 4X ₂ ≦ X ₁ (3) X ₂ ≦ 10 (4)

The adjacent light-transmitting portions 2 and 3 having a color difference ΔE of less than 50 are not irradiated with light from a light source,
Basically, the colors are assimilated, and the existence of the pattern of the light transmitting portion 2 is erased and recognized. As a result, it can be applied to display objects that do not need to be displayed in daylight and display at night, or to display and non-display objects that are turned on and off by turning on and off the light source. It is also possible to give an interesting design effect by illuminating a card used in a card game or the like. However, as an exception, J
The value _{X 1} of the light transmittance of the whole layer located in the light transmitting portion 1 in the area measured in IS K 7105 is 70 (%)
In the above case, the color density of the light transmitting portion 1 is too low and ΔE ≦
Even if it is 50, it will not be assimilated. Therefore, in considering assimilation, relational expression (2) is important in addition to relational expression (1).

[0056] Further, when the value X ₁ of the light transmittance of the whole layer located in the light transmitting portion 1 in the area measured in JIS K 7105 is not less than 3%, even against a much light translucent There is a problem that the pattern of the portion 1 does not stand out clearly. Further, when the maximum value X ₂ of the light transmittance of the whole layer located in the light shielding part 2 in the area measured in JISK 7105 exceeds 1/4 of X _1, a light source, such as stand out the pattern of the transparent portion 1 In this case, there is a problem that light leaks from the light-shielding portion 2 when the intensity of the light is increased. More preferably, a 10X ₂ ≦ _{X 1.} Further, when there is a portion where the colored light transmitting layer is not formed in the light shielding portion 2 in the above-mentioned region, unless X ₂ is 10% or less, the colored light transmitting portion is irradiated with the light from the light source. There is a problem that the boundary between the portion where the layer is not formed and the portion where the layer is formed is visible from the viewing side.

Further, as another laminated structure of the decorative thin material 20, in at least one light-transmitting portion peripheral region a, the light-transmitting portion 1 in the above-described region and the light-shielding portion 2 in the above-mentioned region from the viewer side. And a light-shielding layer 26 formed only on the light-shielding portion 2 in the above-described region (see Configuration IV: FIGS. 15 to 18). In the case where the above laminated configuration is adopted in a part of the light transmitting portion peripheral region a,
Of course, the remaining light-transmitting portion peripheral region a does not have the above-described laminated configuration (for example, the configuration III may be used), and therefore, the following description is for the above-described region.

More specifically, at least one light-transmitting portion peripheral region a has the following layer configuration, that is, the light-shielding portion 2 in the above-described region on one surface of the light-transmitting base sheet 27.
A light-shielding layer 26 is formed only at a portion corresponding to the light-transmitting portion 1, and a colored light-transmitting layer 25 is formed at least at a portion corresponding to the light-transmitting portion 1 in the above-mentioned region, to form a decorative thin article 20. It is visually recognized from the 27 side (see FIG. 15).

The base sheet 27 need not be the side closest to the viewer side. For example, at least one light-transmitting portion peripheral region a having the following layer configuration, that is, the light-transmitting portion 1 in the above-mentioned region and the light-shielding portion 2 in the above-mentioned region on one surface of the light-transmitting base sheet 27 The colored translucent layer 25 as described above is formed in the corresponding portion, and the base sheet 2
The light-shielding layer 26 as described above may be formed only on the other surface of the surface 7 corresponding to the light-shielding portion 2 in the above-mentioned region (FIG. 1).
6). Alternatively, a light-shielding layer 26 as described above is formed only in a portion corresponding to the light-shielding portion 2 in the above-described region on one surface of the light-transmitting base sheet 27, with the following layer configuration for the above-mentioned region. Translucent part 1 in the above area
Alternatively, the above-described colored light-transmitting layer 25 may be formed at a position corresponding to the light-shielding portion 2 in the region (see FIG. 17). In addition, the laminated structure of the decorative thin material 20 has a layer structure in which the colored translucent layer 25 and the base sheet 27 are also used for the above-described region, that is, a translucent and colored resin. The light-shielding layer 26 as described above may be formed only at a portion corresponding to the light-shielding portion 2 in the above-described region on one surface of the colored translucent and base sheet 28 (see FIG. 18).

It should be noted that the colored translucent layer 25,
Decorative thin material 20 in which light shielding layers 26 are sequentially laminated (configuration IV)
The light-shielding layer 26, the colored light-transmitting layer 25, the colored light-transmitting / substrate sheet 28, the substrate sheet 27, the material of the metal used in the backing sheet, and the material of each layer, and the means for forming each layer are light-shielded from the viewing side described above. It can be the same as that of the decorative thin article 20 (Constitution III) in which the layer 21 and the colored translucent layer 22 are laminated in this order.

As described above, in the at least one light-transmitting portion peripheral region a, the colored light-transmitting layer 25 formed on the light-transmitting portion 1 in the above-mentioned region and the light-shielding portion 2 in the above-mentioned region from the viewing side.
When the decorative thin material is divided into the light-transmitting portion 1 and the light-shielding portion 2 by sequentially laminating the light-shielding layers 26 formed only on the light-shielding portions 2 in the above-mentioned region (see FIGS. 15 to 18).
From the viewing side, the light-transmitting portion 1 in the above-mentioned region and the light-shielding portion 2 in the above-mentioned region are converted into L ^* a ^* b of CIE (International Commission on Illumination) 1976
^* Color difference ΔE when chromaticity is measured in color system, JIS
Light-transmitting part 1 in the above area measured at K 7105
The value of the light transmittance of the whole layer located in X _{1 (%)} and the maximum value X ₂ of the light transmittance of the whole layer located in the light shielding part 2 of the region for _(%), the following equation (1) (3) must be satisfied. ΔE ≦ 50 (1) 3 ≦ X ₁ <70 (2) 4X ₂ ≦ X ₁ (3)

The reason why the relational expressions (1) to (3) need to be satisfied is the same as in the case of the configuration III. Structure III
Similarly to the above, 10X ₂ ≦ X ₁ is more preferable. However,
In the case of the present configuration IV, since there is no portion where the colored light-transmitting layer is not formed in the light-shielding portion 2 in the region from above (therefore, the light transmittance is the same everywhere in the light-shielding portion 2;
Is the maximum value and the minimum value of the light transmittance in the light shielding portion 2 at the same time. ), From the boundary is the viewing side of the portion formed with the formation that are not part of the colored translucent layers in the light shielding part 2 when irradiated with light from a light source without limit X ₂ below 10 (%) I can't see it. Therefore, in the present configuration IV, the color of the light-shielding portion 2 is limited to only the colors that can be expressed by a small part of the coloring agent (iron oxide brown, carbon black black, titanium oxide white, etc.) as in the configuration III. Never be. For example, the light shielding portion 2 of the decorative thin material 20 can be made to have a metal deposition color, a metallic color, or a yellowish color.

The following Table 1 shows that the colored light transmitting layer formed on the light transmitting portion in the region and the light shielding portion in the region, and the light shielding layer formed only on the light shielding portion in the region are sequentially arranged from the viewer side. Samples 1 to 14 were prepared for the laminated decorative molded product (Constitution II) or the decorative thin article (Constitution IV), and the light-transmitting portion in the region was viewed from the viewing side without being illuminated from behind with a light source. And the light-shielding part are L ^* a ^* b of CIE (International Commission on Illumination) 1976
^{* The} chromaticity is measured in a color system, the color difference between the light-transmitting part and the light-shielding part is determined from the measurement result, and the assimilation of the light-transmitting part and the light-shielding part at that time is shown together with the result of visual judgment. It is. Further, in Table 1, for samples 1 to 14, all the layers light transmittance X ₂ which is located on the light-shielding portion of said area as the light transmittance X ₁ of all layers located on the light-transmitting portion in a region Each is measured in accordance with JIS K 7105, and the measurement result and the ratio of X ₁ / X ₂ indicate that the illuminating property of the light transmitting part in the area and the light leakage prevention of the light shielding part in the area are illuminated with a light source from behind. The results are shown together with the results of visually determining the sex.

[0064]

[Table 1]

In Table 1, 同, △, Δ, and × in the columns of assimilation, illumination, and light leakage prevention mean the following states, respectively.

<Assimilation> ：: When not illuminated by a light source from behind, the color difference between the light-transmitting part and the light-shielding part cannot be recognized unless carefully observed. △: Similar color when not illuminated by a light source from behind. In Although,
The color difference between the light-transmitting part and the light-shielding part can be slightly recognized. ×: When not illuminated with a light source from behind, the color difference between the light-transmitting part and the light-shielding part can be clearly recognized.

<Illumination> A: When illuminated by a light source from behind, the pattern of the translucent portion clearly emerges. O: When illuminated by the light source from behind, the pattern of the translucent portion is slightly insufficient. Difficult to determine the pattern of the translucent part when illuminated by a light source from ×: Unable to determine the pattern of the translucent part when illuminated by a light source from behind

<Light Leak Prevention>: No light leaks at the light-shielding portion when illuminated from behind by light source. ：: No light leaks to the light-shielding portion when illuminated from behind by light source, if intensity of light source is adjusted. There is a range. △: When illuminated from behind with a light source, there is only a small area where light does not leak in the light-shielding portion even if the intensity of the light source is adjusted. ×: When illuminated from behind with a light source, a considerable amount of light leaks in the light-shielding portion. Do

Table 2 below shows that a light-shielding layer formed only in the light-shielding portion in the region and a colored light-transmitting layer formed in at least the light-transmitting portion in the region are sequentially laminated from the viewer side. Decorative molded product (Structure I) or decorative thin material (Structure III)
Samples 15 to 26 were prepared, and the light-transmitting part and the light-shielding part in the above-mentioned area were viewed from the viewing side without being illuminated with a light source from behind, and the CIE (International Commission on Illumination) 1976 L ^* a ^* b ^* The chromaticity was measured in the above, and the color difference between the light-transmitting part and the light-shielding part was obtained from the measurement result, and the assimilation property between the light-transmitting part and the light-shielding part at that time was visually shown together with the result of determination. Further, Table 2 includes the sample 15 to 26, the molded article located in the light blocking portion of the entire layer within the region and light transmittance X _1, including a molded article located in the transparent portion of the area total The light transmittance X ₂ of each layer was measured according to JIS K 7105, and the measurement result and the ratio of X ₁ / X ₂ were determined as follows:
Visually observe the illuminating properties of the translucent portion in the region, the boundary of the colored translucent layer around the translucent portion in the region, and the light leakage preventing property of the light shielding portion in the region in a state illuminated by a light source from behind. It is shown together with the result of the judgment.

[0070]

[Table 2]

In Table 2, ，, △, Δ, and × in the columns of assimilation, illuminating properties, and light leakage prevention mean the same states as in Table 1. Further, ○, Δ, and × in the column of the boundary appearance in Table 2 mean the following states. <Boundary appearance> ：: When illuminated by a light source from behind, the boundary of the colored translucent layer is not visible around the translucent portion. Δ: When illuminated by the light source from behind, the boundary of the colored translucent layer is around the translucent portion. Hardly visible ×: When illuminated with a light source from behind, the boundary of the colored translucent layer is easily visible around the translucent part

As can be seen from Table 1, Samples 1 and 2 have a problem of illuminating property in that the pattern of the light-transmitting portion cannot be determined even when illuminated from behind by a light source.
The samples 8 and 10 have a problem that a considerable amount of light leaks at the light shielding portion when illuminated by a light source from behind.
No. 1 has a large color difference, and samples 10 to 14 have light-transmitting parts whose colors are too light, so that the color difference between the light-transmitting part and the light-shielding part can be clearly recognized even without illuminating the light source from behind. There is a problem of sex.

As can be seen from Table 2, samples 15, 16
There is a problem of illuminating property that it is impossible to determine the pattern of the translucent portion even when illuminated by a light source from behind.
Samples Nos. 8, 19 and 22 have a problem that a considerable amount of light leaks at the light-shielding portion when illuminated by a light source from behind.
7, 20, and 24, the color difference is large, and the color of the light-transmitting part of the sample 26 is too light, so that the color difference between the light-transmitting part and the light-shielding part can be clearly recognized without any light from behind. The sample 25 has a problem that the boundary of the colored translucent layer is easily visible around the translucent portion when the sample 25 is illuminated with a light source from behind.

[0074]

Embodiment 1 <Bronze metal glossy telephone case: see FIGS. 19 and 20>
First, a polycarbonate resin film having a thickness of 250 μm was used as the base sheet 18, and the colored translucent layer 1 was formed thereon.
5 is a translucent colored ink layer 15a having a thickness of 1 μm, which is formed by a gravure printing method and is made of a coloring agent mainly composed of brilliant yellow and an acrylic resin; A translucent metal thin film layer 15b of 03 μm was sequentially laminated. Next, an 8 μm-thick light-shielding ink layer made of carbon black and vinyl chloride-vinyl acetate copolymer resin and formed with a letter pattern of “NISSHA” by screen printing was formed on the colored translucent layer 15. The insert film 5 was obtained by laminating as the light shielding layer 14. The insert film 5 is divided into a light-shielding portion 2 in which the colored light-transmitting layer 15 and the light-shielding layer 14 overlap, and a light-transmitting portion 1 in which the colored light-transmitting layer 15 and the light-shielding layer 14 do not overlap. Placing the insert film 5 as described above in an injection mold for molding a telephone case, closing the mold, and injecting a transparent molding resin made of a transparent polycarbonate resin into the cavity. As a result, the insert film was integrated with the surface of the molded product at the same time as the molding of the translucent molded product 4 having a thickness of 2.5 mm to obtain a decorative molded product 7 having the light transmitting portion 1 and the light shielding portion 2 (FIG. 19). After cooling, the mold was opened to remove the decorative molded product 7 from the mold. The decorative molded article is used for a telephone case. For this phone case, use a Minolta colorimeter to measure CIE from the insert film side of the light-shielding part.
(International Commission on Illumination) When chromaticity was measured in the L ^* a ^* b ^* color system of 1976, the chromaticity value was L ^* =-60, a ^*.
= 13, b ^* = 6. The chromaticity value measured from the insert film side of the light transmitting portion is L ^* = − 45, a ^* =
-23, b ^* = 18. When the chromaticity difference between the light-shielding portion and the light-transmitting portion was calculated from these measured values, ΔE = 30. Furthermore, using an Olympus microspectrophotometer, JIS
When the value X ₁ (%) of the light transmittance of all the layers including the molded product located in the light transmitting portion was measured in K 7105, X ₁
= 40. Further, when the maximum value X ₂ (%) of the light transmittance of all the layers including the molded product located in the light shielding portion was measured, it was X ₂ = 7.5. When the telephone housing is not illuminated by the light source 3 from behind, the whole body is a bronze metallic glossy color, and the character pattern of the light transmitting portion 1 is not recognized at all (see FIG. 20A). However, in the state of being illuminated from behind by the light source 3, the translucent part 1 forming the yellow-brown “NISSHA” character could be clearly raised (see FIG. 20B).

Example 2 <Silver metallic automobile interior parts: FIGS. 6 and 21
Reference> First, an acrylic resin film having a thickness of 125 μm was used as the base sheet 16, and the colored translucent layer 15 was formed thereon.
As a result, a 2 μm-thick translucent ink layer made of an aluminum flake pigment and an acrylic resin and formed by a gravure printing method was formed. Next, a 10 μm thick light-shielding ink layer made of carbon black, titanium oxide, and an acrylic resin and formed with a character pattern of “NISSHA” by screen printing is formed on the colored light-transmitting layer 15 with a light-shielding layer 14. To obtain an insert film 5. This insert film is divided into a light-shielding portion 2 in which the colored light-transmitting layer 15 and the light-shielding layer 14 overlap, and a light-transmitting portion 1 in which the colored light-transmitting layer 15 and the light-shielding layer 14 do not overlap. Insert film like above,
It is placed in an injection molding mold for molding automotive interior parts, closed, and a transparent molding resin made of a transparent polycarbonate resin is injected into the cavity, so that a 3.5-mm thick light-transmitting material is obtained. Simultaneously with the molding of the molded article 4, the insert film 5 was integrated with the surface of the molded article 4 to obtain the decorative molded article 7 having the light transmitting portion 1 and the light shielding portion 2 (FIG. 6).
reference). After cooling, the mold was opened to remove the decorative molded product 7 from the mold. The decorative molded article is used for automotive interior parts. For this automobile interior part, CIE was used from the insert film side of the light-shielding part using a Minolta colorimeter.
(International Commission on Illumination) When chromaticity was measured in the L ^* a ^* b ^* color system of 1976, the chromaticity value was L ^* = 17, a ^* =
5, b ^* = 6. The chromaticity values measured from the insert film side of the light-transmitting portion are L ^* = 20, a ^* = 3, b
^* = 2. When the chromaticity difference between the light-shielding portion 2 and the light-transmitting portion 1 was calculated from these measured values, ΔE = 5. Furthermore, using an Olympus microspectrophotometer, JIS K71
At 05, the value of the light transmittance X ₁ (%) of all layers including the molded product located in the light transmitting portion was measured, and it was X ₁ = 20). Further, when the maximum value X ₂ (%) of the light transmittance of all the layers including the molded product located in the light shielding portion was measured, it was found that X ₂
= 3.5. When the interior parts of the automobile are not illuminated by the light source 3 from behind, the whole of the interior parts has a silver metallic color, and the character pattern of the light transmitting portion 1 is not recognized at all (see FIG. 21A). In the state of being illuminated from behind by the light source 3, the light-transmitting portion 1 forming the gray "NISSHA" character was able to stand out clearly (FIG. 21b).
reference).

Example 3 <Yellow-white electric rice cooker switch panel: see FIGS. 22 and 23
Teru> First, 188μm thick polyester resin film
Is used as the base sheet 16 and the colored translucent layer 15 is formed thereon.
From brilliant yellow and cellulosic resin
1.5 μm thick formed by offset printing
A translucent colored ink layer was laminated. Then, this colored translucent
On the layer 15, a titanium oxide and acrylic resin
"Cooked rice" is formed in a blank character pattern by the clean printing method
The light-shielding ink layer having a thickness of 12 μm is used as a light-shielding layer 14.
And laminated. In addition, a vinyl-based adhesive ink layer
After coating the entire surface, the backing sheet 29 has a thickness of 0.
By laminating a 3mm translucent ABS sheet
An insert film 5 was obtained. This insert fill
A light-shielding portion in which the colored light-transmitting layer 15 and the light-shielding layer 14 overlap with each other.
2, the colored translucent layer 15 and the light shielding layer 14 do not overlap
It is divided into a light transmitting section 1. Inserter like above
To form an electric rice cooker switch panel
For injection molding, close the mold, and
Transparent molding resin made of transparent ABS resin is injected
To form a light-transmitting molded product 4 having a thickness of 2 mm.
At the same time, insert film 5 is integrated on the surface of molded product 4
To obtain a decorative molded product 7 having a light transmitting part 1 and a light shielding part 2
(See FIG. 22). After cooling, open the mold and decorate the molded product 7
Was removed from the mold. This decorative molded product is used for electric rice cookers
It is a switch panel. This electric rice cooker switch panel
About the shaded area using a Minolta colorimeter.
CIE (International Commission on Illumination) 197
6 L^*a^*b ^*When chromaticity was measured in the color system,
The chromaticity value is L^*= 30, a^*= 10, b^*= 40
Was. Moreover, it measured from the insert film side of the light transmission part.
The chromaticity value is L ^*= 50, a^*= 13, b^*= 12
Was. From these measured values, the chromaticity difference between the light-shielding part 2 and the light-transmitting part 1
Was calculated, and ΔE = 33. In addition, Olympa
JIS K 7105 using a microscope
The value X of the light transmittance of all the layers including the molded product located in the light transmitting portion
₁(%), X₁= 60. Ma
In addition, the light transmittance of all layers including the molded product
Maximum value X₂(%), X₂= 10
Was. This electric rice cooker switch panel is
When not illuminated, the whole is yellowish white,
Is not recognized at all (see FIG. 23a).
However, in the state of being illuminated by the light source 3 from behind,
The transparent part 1 that forms the character of "cooked rice" is floated clearly.
(See FIG. 23b).

Example 4 <Illumination display product for black taxi: see FIGS. 5 and 24> First, a polyester resin film having a thickness of 38 μm was used as the base sheet 12, and a polyvinylidene fluoride was formed thereon by a roll coating method. The formed release layer 13 having a thickness of 10 μm is formed thereon, and as the light-shielding layer 9, a large amount of carbon black and acrylic resin is used as the light shielding layer 9. A light-shielding ink layer was formed. Next, a transparent ink layer having a thickness of 8 μm made of a very small amount of carbon black and an acrylic resin and formed by a screen printing method is formed as a colored transparent layer 8 on the blank character pattern and the periphery thereof. Further, a transfer material was obtained by laminating thereon an adhesive ink layer made of a vinyl chloride resin by a screen printing method. This transfer material is divided into a light transmitting portion 1 corresponding to the blank character pattern and a light shielding portion 2 around the light transmitting portion 1. By placing the transfer material as described above in a compression molding mold for molding an illuminated display product, closing the mold, and injecting a translucent molding resin made of an acrylic resin into the cavity, The transfer material is integrated with the surface of the molded article 4 simultaneously with the molding of the transparent molded article 4 having a thickness of 4 mm, and after cooling, the mold is opened to remove the decorative molded article 7 from the mold. The light transmitting part 1 and the light shielding part 2
(See FIG. 5). The decorative molded article is used as a taxi illuminated display article. For this taxi illuminated display product, CIE (International Commission on Illumination) 1 uses a Minolta colorimeter from the release layer side of the light-shielding part.
When chromaticity was measured in the L ^* a ^* b ^* color system of 976, the chromaticity values were L ^* = 4, a ^* = 1, and b ^* =-2. The chromaticity value measured from the release layer side of the light-transmitting portion is L ^*
= 7, a ^* = 2, b ^* =-4. When the chromaticity difference between the light-shielding part 2 and the light-transmitting part 1 is calculated from these measured values, ΔE
= 3.5. Furthermore, the value X ₁ (%) of the light transmittance of all the layers including the molded article located in the light-transmitting portion was measured using Olympus microspectrophotometer according to JIS K 7105, and it was X ₁ = 26. . Further, the maximum value X ₂ (%) of the light transmittance of all the layers including the molded product located in the light shielding portion.
Was found to be X ₂ = 2.2. This taxi illuminated display product is entirely black when not illuminated by the light source 3 from behind, and the character pattern of the translucent portion 1 is not recognized at all (see FIG. 24A). However, in the state of being illuminated from behind by the light source 3, the light transmitting portion 1 forming the gray "blank" character was able to stand out clearly (see FIG. 24b).

Example 5 <Green Illuminated Signboard: See FIGS. 18 and 25> First, a thickness of 3 m
m, using a phthalocyanine green-containing acrylic resin sheet as the coloring and base sheet 28, masking it with a pattern of "night entrance", and then applying a large amount of a phthalocyanine green and acrylic resin-based paint thereon, By removing the masking after leaving for several hours, the “night entrance” was removed and the thickness formed in a character pattern 5
A 0 μm light-shielding layer 26 was formed. This sheet is divided into a light transmitting portion 1 corresponding to the blank character pattern and a light shielding portion 2 around the light transmitting portion 1. After the sheet as described above is vacuum-formed and processed into a desired shape, unnecessary portions are cut out by laser processing, so that the decorative thin material 20 having the light-transmitting portion 1 and the light-shielding portion 2 (see FIG. 18) ) Got. The decorative thin article 20 is used as an illuminated signboard to be installed at the upper part of the entrance. This illuminated signboard was measured for chromaticity in the L ^* a ^* b ^* color system of CIE (International Commission on Illumination) 1976 from the side of the coloring and base sheet 28 of the light-shielding portion using a Minolta colorimeter. The values are L ^* = 41, a ^* =-2
7, b ^* = 31. Further, the chromaticity value measured from the colored / substrate sheet 28 side of the translucent portion is L ^* = 48, a ^* = −.
22, b ^* = 24. When the chromaticity difference between the light-shielding part 2 and the light-transmitting part 1 is calculated from these measured values, ΔE = 11.1.
Met. Furthermore, using an Olympus microspectrometer,
When the value X ₁ (%) of the light transmittance of all the layers located in the light transmitting portion was measured in IS K 7105, X ₁ = 23.
Met). Further, when the maximum value X ₂ (%) of the light transmittance of all the layers located in the light-shielding portion was measured, it was X ₂ = 5.4. This illuminated signboard is entirely green when not illuminated by the light source 3 from behind, and the character pattern of the translucent portion 1 is not recognized at all (see FIG. 25A). However, in the state of being illuminated by the light source 3 from behind, the light-transmitting portion 1 forming the character of the green-white “nighttime entrance” was able to stand out clearly (see FIG. 25B).

Example 6 <Red Illuminated Card: See FIGS. 13 and 26> First, a polylactic acid-based biodegradable resin sheet having a thickness of 0.5 mm was used as a base sheet 23, and a colored translucent layer 22 was formed thereon. A 0.5 μm-thick translucent colored ink layer composed of a very small amount of iron oxide and a cellulose resin and formed by a gravure printing method was laminated. Next, a 5 μm thick light-shielding ink layer made of a large amount of iron oxide and a cellulosic resin and formed with a letter pattern of “NISSHA” by screen printing on the colored light-transmitting layer 22 as a light-shielding layer 21. Laminated. This sheet is divided into a light transmitting portion 1 corresponding to the blank character pattern and a light shielding portion 2 around the light transmitting portion 1. A decorative thin material 2 having a light-transmitting portion 1 and a light-shielding portion 2 by punching the above-mentioned sheet into a prescribed card size.
0 (see FIG. 13). The decorative thin material 20 is used as an illumination card. For this illuminated card, CIE was performed from the light-shielding layer 21 side of the light-shielding portion using a Minolta colorimeter.
(International Commission on Illumination) When chromaticity was measured in the L ^* a ^* b ^* color system of 1976, the chromaticity value was L ^* = 55, a ^* =
22, b ^* = 34. Further, the chromaticity values measured from the colored translucent layer 22 side of the translucent portion are L ^* = 47, a ^* = 26,
b ^* = 41. When the chromaticity difference between the light-shielding portion 2 and the light-transmitting portion 1 was calculated from these measured values, ΔE = 11.3. Furthermore, using Olympus microspectrophotometer, JISK
At 7105, the value X ₁ (%) of the light transmittance of all the layers located in the light transmitting portion was X ₁ = 45). Further, when the maximum value X ₂ (%) of the light transmittance of all the layers located in the light shielding portion was measured, it was X ₂ = 6.5. When the illuminated card is not illuminated by the light source 3 from behind, the entire illuminated card is reddish brown, and the character pattern of the translucent section 1 is not recognized at all (see FIG. 26A). However, in the state of being illuminated by the light source 3 from behind, the light-transmitting portion 1 forming the light brown “night entrance” character could be clearly raised (see FIG. 26B).

[0080]

The decorative molded product and the decorative thin product of the present invention which can be backlit have the above-mentioned constitutions, and therefore have the following excellent effects.

That is, in the decorative molded product capable of backlighting according to the present invention, the insert film or the transfer layer is integrated with the surface of the translucent molded product, and at least one translucent portion and the translucent portion are provided. Since the decorative molded product having the adjacent light-shielding portion has the above-described specific lamination structure and optical conditions in at least one light-transmitting portion peripheral region, the light-transmitting portion is illuminated with a light source from behind. The pattern of the part emerges, but when not illuminated from behind by a light source, the pattern assimilates with the surrounding light-shielding part and presents a design such that its existence is not understood.

The decorative thin material capable of backlighting according to the present invention is a decorative thin material having at least one light transmitting portion and a light shielding portion adjacent to the light transmitting portion, wherein the decorative thin material has at least one light transmitting portion. In the peripheral area, since it has the specific lamination structure and optical conditions as described above, when illuminated with a light source from behind, the pattern of the translucent portion emerges, but in the state where it is not illuminated with the light source from behind, the pattern is Is assimilated with the surrounding light-shielding portion, and presents a design in which its presence cannot be recognized.

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a decorative molded product according to the present invention.

FIG. 2 is a sectional view showing one embodiment of a decorative molded product according to the present invention.

FIG. 3 is a sectional view showing one embodiment of a decorative molded product according to the present invention.

FIG. 4 is a cross-sectional view showing one embodiment of a decorative molded product according to the present invention.

FIG. 5 is a sectional view showing one embodiment of a decorative molded product according to the present invention.

FIG. 6 is a sectional view showing one embodiment of a decorative molded product according to the present invention.

FIG. 7 is a cross-sectional view showing one embodiment of a decorative molded product according to the present invention.

FIG. 8 is a cross-sectional view showing one embodiment of a decorative molded product according to the present invention.

FIG. 9 is a cross-sectional view showing one embodiment of a decorative molded product according to the present invention.

FIG. 10 is a sectional view showing one embodiment of a decorative molded product according to the present invention.

FIG. 11 is a sectional view showing one embodiment of a decorative thin material according to the present invention.

FIG. 12 is a sectional view showing one embodiment of a decorative thin material according to the present invention.

FIG. 13 is a cross-sectional view showing one embodiment of a decorative thin material according to the present invention.

FIG. 14 is a sectional view showing one embodiment of a decorative thin material according to the present invention.

FIG. 15 is a cross-sectional view showing one embodiment of a decorative thin material according to the present invention.

FIG. 16 is a cross-sectional view showing one embodiment of a decorative thin material according to the present invention.

FIG. 17 is a cross-sectional view showing one embodiment of a decorative thin material according to the present invention.

FIG. 18 is a cross-sectional view showing one embodiment of a decorative thin material according to the present invention.

FIG. 19 is a sectional view showing one embodiment of a decorative molded product according to the present invention.

FIG. 20 is a diagram showing a change due to illumination of the decorative molded product according to the present invention.

FIG. 21 is a diagram showing a change of the decorative molded product according to the present invention due to illumination.

FIG. 22 is a sectional view showing one embodiment of a decorative molded product according to the present invention.

FIG. 23 is a view showing a change of the decorative molded product according to the present invention due to illumination.

FIG. 24 is a diagram showing a change of the decorative molded product according to the present invention due to illumination.

FIG. 25 is a diagram showing a change of the decorative thin material according to the present invention due to illumination.

FIG. 26 is a view showing a change of the decorative thin material according to the present invention due to illumination.

FIG. 27 is a diagram showing a chromaticity measurement method according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 light transmitting part 2 light shielding part 3 light source 4 molded product 5 insert film 6 transfer layer 7 decorative molded product 8 colored light transmitting layer 9 light shielding layer 10 base sheet 11 coloring and base sheet 12 base sheet 13 release layer 14 light shielding layer 15 coloring Translucent layer 16 Base sheet 17 Colored / substrate sheet 18 Base sheet 19 Release layer 20 Decorated thin material 21 Light-shielding layer 22 Colored light-transmitting layer 23 Base sheet 24 Colored / substrate sheet 25 Colored light-transmitting layer 26 Light-shielding layer 27 Base sheet 28 Colored / Substrate Sheet 29 Backing Sheet 30 Measuring Instrument Main Body 31 Measuring Head 32 Prop 33 Sample

Claims (6)

[Claims] 1. A decorative molded product in which an insert film or a transfer layer is integrated with the surface of a translucent molded product and has at least one translucent portion and a light-shielding portion adjacent to the translucent portion,
A light-shielding layer formed only on the light-shielding portion and a colored light-transmitting layer formed on at least the light-transmitting portion in the at least one light-transmitting portion peripheral region, sequentially laminated on the surface of the light-transmitting molded article from the viewer side And the light-transmitting part and the light-shielding part in the above-mentioned area are defined by L ^* a ^* b ^* of CIE (International Commission on Illumination) 1976 ^.
Color difference Δ when chromaticity is measured from the viewing side in the color system
E, the value X ₁ (%) of the light transmittance of all the layers including the molded article located in the light-transmitting portion in the above-mentioned area measured in JIS K 7105, and the total value including the molded article located in the light-shielding section in the above-mentioned area. Regarding the maximum value X ₂ (%) of the light transmittance of the layer,
The following relational expressions (1) to (3) hold, and the relational expression (4) holds in addition to the case where there is a portion where the colored translucent layer is not formed in the light-shielding portion in the region. Molded products that can be backlit. ΔE ≦ 50 (1) 3 ≦ X ₁ <70 (2) 4X ₂ ≦ X ₁ (3) X ₂ ≦ 10 (4) 2. A decorative molded product in which an insert film or a transfer layer is integrated with the surface of a translucent molded product and has one or more translucent portions and a light-shielding portion adjacent to the translucent portion,
In at least one light-transmitting portion peripheral region, a colored light-transmitting layer formed on the light-transmitting portion and the light-shielding portion, and a light-shielding layer formed only on the light-shielding portion are sequentially laminated on the surface of the light-transmitting molded product from the viewer side. And the light-transmitting portion and the light-shielding portion in the above-mentioned region are formed by L ^* a ^* b ^* of CIE (International Commission on Illumination) 1976 ^.
Color difference Δ when chromaticity is measured from the viewing side in the color system
E, the value X ₁ (%) of the light transmittance of all the layers including the molded article located in the light-transmitting portion in the above-mentioned region measured in JIS K 7105, and the total including the molded product located in the light-shielding portion in the above-mentioned region. Regarding the maximum value X ₂ (%) of the light transmittance of the layer,
A decorative molded product capable of backlighting, wherein the following relational expressions (1) to (3) are satisfied. ΔE ≦ 50 (1) 3 ≦ X ₁ <70 (2) 4X ₂ ≦ X ₁ (3) 3. The decorative molded product is JIS K710.
The value X ₁ (%) of the light transmittance of all the layers including the molded product located in the light transmitting portion in the above-described region measured in 5 and the light transmission of all the layers including the molded product located in the light shielding portion in the above described region for maximum X ₂ rate _(%), equation 10X ₂ ≦ X ₁ in which holds claim 1 or claim 2 backlighting possible decorative molded article according to any one. 4. A light-shielding device comprising at least one light-transmitting portion and a light-shielding portion adjacent to the light-transmitting portion, wherein the decorative thin material is formed only in the light-shielding portion in at least one light-transmitting portion peripheral region. layer,
At least a colored translucent layer formed on the translucent portion is sequentially laminated from the viewing side, and the translucent portion and the light-shielding portion in the above-mentioned region are formed by LIE of CIE (International Commission on Illumination) 1976.
^{* A *} b ^* Color difference ΔE when chromaticity is measured from the viewing side in the color system, the value X ₁ of the light transmittance of all the layers located in the light-transmitting portion in the above-mentioned region measured according to JIS K 7105.
(%) And the maximum value X ₂ (%) of the light transmittance of all the layers located in the light-shielding portion in the above-described region, the following relational expressions (1) to (3) hold, and When there is a portion where a colored translucent layer is not formed, in addition, a relational expression (4) is satisfied. ΔE ≦ 50 (1) 3 ≦ X ₁ <70 (2) 4X ₂ ≦ X ₁ (3) X ₂ ≦ 10 (4) 5. A decorative thin material having at least one light-transmitting portion and a light-shielding portion adjacent to the light-transmitting portion is formed in the light-transmitting portion and the light-shielding portion in at least one light-transmitting portion peripheral region. And a light-shielding layer formed only on the light-shielding portion is sequentially laminated from the viewing side, and the light-transmitting portion and the light-shielding portion in the above-described region are formed by CIE (International Commission on Illumination) 1976. L
^{* A *} b ^* Color difference ΔE when chromaticity is measured from the viewing side in the color system, the value X ₁ of the light transmittance of all layers located in the light-transmitting portion within the above-mentioned region measured according to JIS K 7105.
The following relational expressions (1) to (3) hold true for (%) and the maximum value X ₂ (%) of the light transmittance of all the layers located in the light-shielding portion in the region. Decorative thin material that can be backlit. ΔE ≦ 50 (1) 3 ≦ X ₁ <70 (2) 4X ₂ ≦ X ₁ (3) 6. The decorative thin material according to JIS K710.
5, the value X ₁ (%) of the light transmittance of all the layers located in the light-transmitting portion in the region and the maximum value X ₂ (%) of the light transmittance of all the layers located in the light-shielding portion in the region. The decorative thin material capable of backlighting according to claim 4, wherein the relational expression 10X ₂ ≦ X ₁ is satisfied.