JP2883397B2 - Iris-colored laminate and gold-silver thread - Google Patents

Description

The present invention relates to an iris laminate and a gold-silver thread.

[Issues to be Solved by the Related Art] Hitherto, an iris-colored gold-silver thread obtained by slitting an iris-colored laminate formed by providing an iris compound thin film layer such as zinc sulfide on a polyester film or the like has been known. .

However, such conventional iris-colored gold-silver yarns exhibit a monotonous iris color and are inferior in gloss, or are inferior in practical properties as gold-silver yarns (resistance to processing such as bleaching, dyeing, refining, and washing resistance). There was such a problem.

In view of the above, the present invention provides an iris laminate having excellent iris colors, excellent gloss, and excellent practical properties, and more particularly, an iris gold-silver thread.

[Means for Solving the Problems] The present invention is a laminate in which a transparent iris layer is provided on one surface of a transparent plastic film, wherein the iris layer has a thickness within a range of 5 to 100 nm. One iris compound thin film layer selected from the group consisting of zinc sulfide, bismuth oxide and antimony oxide, having a non-uniform thickness, wherein the difference between the thick and thin portions is 20 to 80 nm And a transparent resin layer having a non-uniform thickness, wherein the thickness is in the range of 0.01 to 5 μm and the difference between the thick and thin portions is 0.1 to 1 μm. The present invention relates to an iris-colored laminate characterized by the following.

Further, the present invention relates to an iris-colored gold-silver thread obtained by slitting the iris-colored laminate.

[Operation and Examples] The iris laminate of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic partial sectional view showing an embodiment of the iris-colored laminate of the present invention. In FIG. 1, (1) is a transparent plastic film, on which a transparent resin undercoat layer (2) is provided, and an iris layer (3) is provided thereon. The iris layer (3) in this embodiment is obtained by laminating a transparent resin layer (3b) having an uneven thickness on an iris compound thin film layer (3a) having an uneven thickness.

FIG. 2 is a schematic partial sectional view showing another embodiment of the iris-colored laminate of the present invention. In the iris laminate shown in FIG. 2, the iris layer (3) is provided directly on the plastic film (1), and the iris layer (3) in this embodiment is transparent having an uneven thickness. An iris compound thin film layer (3a) having a non-uniform thickness is laminated on a transparent resin layer (3b), and a further transparent resin overcoat layer (4) is formed on the thin film layer (3a). Is provided.

As shown in FIG. 1, the lamination order of the iris layer (3) is such that the iris compound thin film layer (3a) having an uneven thickness from the plastic film (1) side and the resin layer (3b) having an uneven thickness. In this case, it is preferable to provide the iris compound thin film layer (3a) on the plastic film (1) via the resin undercoat layer (2).

As shown in FIG. 2, the lamination order of the iris layer (3) is a resin layer (3b) having an uneven thickness from the plastic film (1) side, and an iris compound thin film layer (3a) having an uneven thickness.
In this case, it is not necessary to particularly provide the resin undercoat layer (2), but it may be provided. When the lamination order of the iris layer (3) is shown in FIG.
Since a) is the outermost layer, it is preferable to provide a resin overcoat layer (4) for protection.

In the iris laminate of the present invention, iris is obtained on both the plastic film (1) side and the opposite side.

In the present invention, the iris layer (3) has a configuration in which the iris compound thin film layer (3a) having an uneven thickness and the transparent resin layer (3b) having an uneven thickness are laminated. The colors are rich and powerful, and the gloss is outstanding.

Also, since the iris compound thin film layer (3a) is provided on the plastic film (1) via the resin undercoat layer (2) or the resin layer (3b) having an uneven thickness, the thin film layer (3a) and the plastic Excellent adhesion with the film (1)
Therefore, resistance to processing such as bleaching, dyeing and scouring or washing resistance is good, and deterioration or disappearance of iris color due to these processings is prevented.

The transparent plastic film (1) used in the present invention is not particularly limited, and films conventionally used for applications such as gold and silver yarns, for example, polyester, polyamide, polyamideimide, polyethylene, polypropylene, cellulose acetate, polycarbonate, polychloride Resin films such as vinyl and fluororesin are appropriately used. The thickness of transparent plastic film is usually 4-100
It is appropriately selected from the range of μm, more preferably from the range of 6 to 50 μm. The mechanical properties of the transparent plastic film affect the mechanical properties of the iris-colored gold-silver yarn, which can be obtained almost as it is, and determine the weaving properties and texture.

In the present invention, the thickness of the transparent resin undercoat layer (2) is usually in the range of 0.01 to 5 μm, and more preferably 0.02 to 3 μm.
Is selected from the range. Transparent resin undercoat layer thickness is 0.01μm
If it is less than 1, the resistance to washing, bleaching, dyeing, scouring, etc. is poor, which is not preferred. On the other hand, if it exceeds 5 μm, it becomes undesirably rigid as a whole in applications such as gold and silver yarns and lacks in weaving properties and texture.

As the resin for forming the transparent resin undercoat layer (2), any of various resins such as a thermoplastic resin, a thermosetting resin, an electron beam curable resin, and an ultraviolet curable resin can be used. For example, an acrylic resin , Styrene resin, acrylic-styrene copolymer, vinyl chloride resin, vinyl acetate resin, vinyl chloride-vinyl acetate copolymer, polyvinyl butyral, polycarbonate, nitrocellulose, cellulose acetate, urethane resin, urea resin, A melamine-based resin, a urea-melamine-based resin, an epoxy-based resin, an alkyd-based resin, an aminoalkyd-based resin, a rosin-modified maleic resin, or a mixture thereof is preferably used. Particularly, a curable resin is preferable.

The transparent resin undercoat layer (2) is formed by, for example, a gravure coating method using an organic solvent solution or an aqueous solution of the resin,
The coating is performed by applying to a uniform thickness by an ordinary coating method such as a spray coating method and drying (curing in the case of a thermosetting resin, an electron beam-curable resin, an ultraviolet-curable resin, or the like).

Examples of the iris compound thin film layer (3a) having an uneven thickness used in the present invention include zinc sulfide, bismuth oxide, and antimony oxide thin film layers. From the point that the iris color is beautiful and the resistance to the various treatments is excellent,
Thin film layers of zinc sulfide, bismuth oxide (Bi ₂ O _x , x = 2-5) and antimony oxide (Sb ₂ O _x , x = 2-5) are preferred.

The iris compound thin film layer (3a) is usually in the range of 5 to 100 nm,
More preferably, the thickness is non-uniform in the range of 20 to 80 nm. If the thickness of the thin film layer is less than 5 nm, iris gloss cannot be obtained, which is not preferable. On the other hand, when the thickness exceeds 100 nm, the iris gloss is rather poor, cracks are easily formed, and the resistance to the treatment such as scouring is undesirably reduced. The degree of non-uniformity of the thickness of the iris compound thin film layer (the difference between the thick part and the thin part of the thin film layer, hereinafter referred to as non-uniformity) is preferably about 20 to 80 nm. If the degree of non-uniformity is less than 20 nm, it is difficult to obtain a monochromatic and rich iris color, whereas if it exceeds 80 nm, the intensity of the iris color is undesirably reduced. The non-uniform thickness cycle (meaning the distance between adjacent thick portions or the distance between adjacent thin portions) corresponds to the density of the iris pattern and is usually preferably about 0.5 to 20 cm, but is limited to this range. Not something. The period may be constant or not constant. The non-uniform pattern is usually a stripe pattern, but is not limited thereto. By making the non-uniform period and the pattern narrower than the above range, the iris pattern becomes an averaged thin pattern and an iris color without unevenness is exhibited, which is advantageous in the case of a large area.

The formation of the iris compound thin film layer (3a) may be carried out by using a corresponding evaporation source material and a thin film forming method of a normal vapor deposition method such as a resistance heating method, a high frequency induction heating method, and an electron beam heating method.

In order to make the thickness of the thin film layer non-uniform, when using a continuous or semi-continuous deposition apparatus, for example, an object to be deposited (a resin undercoat layer (2) which continuously moves with an evaporation source in a vacuum chamber of the deposition apparatus. ) Or a resin layer with uneven thickness (3
A mask having an appropriate through-hole (usually a slit-like through-hole) is interposed between the plastic film (1) provided with b) and the mask is reciprocated in a direction perpendicular to the flying direction of the evaporated substance. For example, a method such as vapor deposition is performed.

The material of the evaporation source for forming the iris compound thin film layer (3a) is not particularly limited. For example, as an evaporation source material for forming a zinc sulfide thin film layer, any material obtained by press-molding a powder having a purity of zinc sulfide (ZnS) of 70% by weight or more can be used as appropriate. Is preferably used. As an evaporation source material for forming a bismuth oxide thin film layer, any material can be used as appropriate as long as the powder having a purity of bismuth oxide of 80% by weight or more is press-molded. Are more preferably used. As the evaporation source material for forming the antimony oxide thin film layer, any material may be used as long as it is formed by pressing a powder having a purity of at least 80% by weight of antimony oxide. Is more preferably used.

The film thickness of the iris compound thin film layer is a value measured by a crystal oscillator film thickness monitor.

Resin layer (3b) with non-uniform thickness is usually 0.01-5μ
m, more preferably in the range of 0.02 to 3 μm. If the thickness of the resin layer is less than 0.01 μm, almost no iris gloss can be obtained, which is not preferable. 5 μm
On the other hand, when it exceeds, the iris gloss is inferior, and in the case of applications such as gold and silver yarns, it is undesirably rigid as a whole and lacks in weaving properties and texture. Resin layer (3b)
Is preferably about 0.1 to 1 μm (the difference between the thick and thin portions of the resin layer, hereinafter referred to as non-uniformity). If the degree of non-uniformity is less than 0.1 μm, it is difficult to obtain a monochromatic and rich iris color, whereas if it exceeds 1 μm, the color development is also undesirably pale. The non-uniform thickness cycle (meaning the distance between adjacent thick portions or the distance between adjacent thin portions) corresponds to the density of the iris pattern and is usually preferably about 0.5 to 20 cm, but is limited to this range. Not something. The period may be constant or not constant. The non-uniform pattern is usually a stripe pattern, but is not limited thereto. The cycle, pattern, etc. of the non-uniform thickness of the resin layer (3b) may be the same as or different from the thin film layer (3a).

Non-uniform periods and patterns are formed by thin film layer (3a) and resin layer (3
There is an advantage that a moiré-like iris pattern can be obtained by making it different from or different from b). By making the non-uniform period and pattern narrower than the above range, the iris pattern becomes an averaged thin pattern and iris color without unevenness is exhibited, which is advantageous for a large area.

Various resins such as a thermoplastic resin, a thermosetting resin, an electron beam curable resin, and an ultraviolet curable resin can be used as the resin for forming the transparent resin layer (3b) having an uneven thickness. For example, acrylic resin, styrene resin, acrylic-styrene copolymer, vinyl chloride resin,
Vinyl acetate resin, vinyl chloride-vinyl acetate copolymer,
Polyvinyl butyral, polycarbonate, nitrocellulose, cellulose acetate, urethane resin, urea resin, melamine resin, urea-melamine resin, epoxy resin, alkyd resin, amino alkyd resin, rosin-modified maleic resin, etc. Alternatively, a mixture is preferably used.

The formation of the transparent resin layer (3b) having an uneven thickness is performed by applying an organic solvent solution or an aqueous solution of the resin to an uneven thickness by a normal coating method such as a gravure coating method or a spray coating method. And drying (in the case of a thermosetting resin, an electron beam curable resin, an ultraviolet curable resin, etc., curing).

The thickness of the transparent resin overcoat layer (4) in the present invention is usually 0.1.
It is selected from the range of 01 to 5 µm, more preferably the range of 0.02 to 3 µm. If the thickness of the transparent resin overcoat layer is less than 0.01 μm, the resistance to each of the above-mentioned treatments is not sufficient, which is not preferable. On the other hand, if it exceeds 5 μm, it is unfavorable because it becomes rigid as a whole in applications such as gold and silver threads and lacks in weaving properties and texture.

As a resin for forming the transparent resin overcoat layer (4), a thermoplastic resin, a thermosetting resin, an electron beam curable resin,
Any of various resins such as an ultraviolet curable resin can be used, for example, an acrylic resin, a styrene resin, an acryl-styrene copolymer, a vinyl chloride resin, a vinyl acetate resin, a vinyl chloride-vinyl acetate copolymer, Polyvinyl butyral, polycarbonate, nitrocellulose, cellulose acetate, urethane resin, urea resin, melamine resin, urea-melamine resin, epoxy resin, alkyd resin, amino alkyd resin, rosin-modified maleic resin, etc. Alternatively, a mixture is preferably used. In particular, a curable resin is preferably used.

The transparent resin overcoat layer (4) is formed by applying an organic solvent solution, an aqueous solution, or the like of the resin to a uniform thickness by a normal coating method such as a gravure coating method or a spray coating method, followed by drying (thermal curing). (In the case of a hydrophilic resin, an electron beam curable resin, an ultraviolet curable resin, etc.).

The transparent resin undercoat layer (2), the transparent resin layer (3b) having an uneven thickness, and the transparent resin overcoat layer (4) are made of a dye and / or a pigment as long as the transparency is not impaired. It may be colored as appropriate.

In the present invention, the two laminates may be laminated by using an adhesive with two plastic films (1) facing inside or the other side facing inside to form a two-ply structure. When the plastic film (1) is formed in a two-ply configuration with the opposite side inside, a gold-silver thread that can withstand georgette processing as well as scouring processing is obtained.

As the adhesive, an adhesive of a urethane resin type, an epoxy resin type, a polyester resin type, an acrylic resin type, a synthetic rubber type or the like is appropriately used.

The iris-colored laminate of the present invention is used for applications such as packaging materials, labels, sequins, posters, buttons, pendants, and other various decorative materials, and is particularly suitably used for gold and silver yarns.

An iris-colored gold-silver thread is obtained by slitting the iris-colored laminate to an appropriate width, for example, a width of 0.15 to 2 mm.

 Next, the present invention will be described with reference to examples.

Example 1 One side of a 12 μm thick polyethylene terephthalate film was composed of 100 parts of thermosetting acrylic resin (parts by weight, the same applies hereinafter), 5 parts of polyisocyanate, 50 parts of toluene, 30 parts of xylene, and 20 parts of n-butyl alcohol. A transparent resin coating is applied with a gravure coater, dried and cured under the conditions of 160 ° C x 20 seconds to form a transparent resin undercoat layer with a uniform thickness of 0.2 µm, and then 99% pure zinc sulfide Evaporated zinc sulfide thin film layer (average thickness 60 nm, maximum thickness 80 nm, minimum thickness 20 nm, thickness non-uniformity)
60 nm, non-uniform period 100 mm, parallel stripe pattern), and a transparent resin coating consisting of 50 parts of thermosetting acrylic resin, 5 parts of polyisocyanate, 50 parts of toluene, 30 parts of xylene, and 20 parts of n-butyl alcohol The coating agent is applied with a gravure coater, dried and cured under the conditions of 160 ° C x 20 seconds, and the transparent resin layer with uneven thickness (average thickness 0.4μm, maximum thickness 1μm, minimum thickness 0.2μm, thickness 0.8μ
m, a non-uniform period of 30 mm, and a parallel stripe pattern) to form a laminate having a beautiful iris color.

The obtained laminate was micro-slit into 120 cuts (0.252 mm width) to obtain iris-colored gold and silver threads.

Example 2 In Example 1, a bismuth oxide (Bi ₂ O ₃ ) thin film layer having an uneven thickness was formed using bismuth oxide (Bi ₂ O ₃ ) as an evaporation source instead of the zinc sulfide thin film layer. In the same manner as in Example 1, an iris laminate and an iris gold-silver thread were obtained.

Example 3 In Example 1, in place of the zinc sulfide thin film layer, an antimony oxide (Sb ₂ O ₃ ) thin film layer having a nonuniform thickness was formed using antimony oxide (Sb ₂ O ₃ ) as an evaporation source. In the same manner as in Example 1, an iris laminate and an iris gold-silver thread were obtained.

Example 4 Two sheets of the laminate obtained in Example 1 were laminated with a polyethylene terephthalate film side inside through a urethane resin-based adhesive layer having a thickness of 2 μm to obtain a two-ply iris-colored laminate.

This laminate was slit in the same manner as in Example 1 to obtain an iris-colored gold-silver thread.

Example 5 A transparent resin coating composed of 100 parts of thermosetting acrylic resin, 5 parts of polyisocyanate, 50 parts of toluene, 30 parts of xylene, and 20 parts of n-butyl alcohol was coated on one surface of a 12 μm-thick polyethylene terephthalate film with a gravure coater. And dried at 160 ° C for 20 seconds, and cured to a transparent resin layer with an uneven thickness (average thickness 0.3 μm, maximum thickness 0.8 μm, minimum thickness 0.2 μm, uneven thickness) 0.6μ once
m, non-uniform period 10mm, average stripe pattern)
A zinc sulfide thin film layer with a non-uniform thickness (average thickness 60 nm, maximum thickness 80 n) is deposited by resistance heating using a pellet formed by pressing 99% pure zinc sulfide powder as an evaporation source.
m, minimum thickness 40nm, thickness non-uniformity 400nm, non-uniform period
10 mm, parallel stripe pattern), and then apply a transparent resin coating composed of 50 parts of thermosetting acrylic resin, 5 parts of polyisocyanate, 50 parts of toluene, 30 parts of xylene, and 20 parts of n-butyl alcohol using a gravure coater. Dry, 16
The coating was cured under the conditions of 0 ° C. × 20 seconds to form a transparent resin overcoating layer having a uniform thickness of 0.2 μm to obtain a laminate having a beautiful iris color.

The obtained laminate was slit in the same manner as in Example 1 to obtain an iris-colored gold-silver thread.

Comparative Example 1 A transparent resin coating composed of 100 parts of thermosetting acrylic resin, 5 parts of polyisocyanate, 50 parts of toluene, 30 parts of xylene and 20 parts of n-butyl alcohol was coated on one side of a 12 μm-thick polyethylene terephthalate film with a gravure coater. Apply and dry at 160 ° C x 20 seconds and cure to a thickness of 0.2
A transparent resin undercoat layer having a uniform thickness of μm is formed, and zinc sulfide is vacuum-deposited thereon to form a zinc sulfide layer having a uniform thickness of 20 nm, and 50 parts of a thermosetting acrylic resin is further formed thereon. , Polyisocyanate 5 parts, toluene 50
Parts, 30 parts of xylene, and 20 parts of n-butyl alcohol were coated with a gravure coater and dried at 160 ° C.
The coating was cured under the conditions of × 20 seconds to form a transparent resin overcoat layer having a uniform thickness of 0.2 μm to obtain an iris laminate.

This laminate was slit in the same manner as in Example 1 to obtain an iris-colored gold-silver thread.

Comparative Example 2 On one surface of a polyethylene terephthalate film having a thickness of 12 μm, zinc sulfide was vacuum-deposited in the same manner as in Example 1 to form a zinc sulfide layer having an uneven thickness, and 50 parts of a thermosetting acrylic resin was further formed thereon. , 5 parts of polyisocyanate,
Toluene 50 parts, xylene 30 parts, n-butyl alcohol 20
Part of the transparent resin coating agent is coated with a gravure coater, dried and cured under the conditions of 160 ° C x 20 seconds to form a transparent resin overcoat layer having a uniform thickness of 0.2 μm and an iris laminate. I got

This laminate was slit in the same manner as in Example 1 to obtain an iris-colored gold-silver thread.

Comparative Example 3 A transparent resin coating composed of 100 parts of thermosetting acrylic resin, 5 parts of polyisocyanate, 50 parts of toluene, 30 parts of xylene, and 20 parts of n-butyl alcohol was coated on one surface of a 12 μm-thick polyethylene terephthalate film by a gravure coater. Apply and dry at 160 ° C x 20 seconds and cure to a thickness of 0.2
A transparent resin undercoat layer having a uniform thickness of μm is formed, and zinc sulfide is vacuum-deposited thereon to form a zinc sulfide layer having a uniform thickness of 20 nm, and 50 parts of a thermosetting acrylic resin is further formed thereon. , Polyisocyanate 5 parts, toluene 50
Parts, 30 parts of xylene, and 20 parts of n-butyl alcohol were coated with a gravure coater and dried at 160 ° C.
Transparent resin layer having an uneven thickness by curing under conditions of × 20 seconds (average thickness 0.3 μm, maximum thickness 0.8 μm, minimum thickness 0.
2 μm, thickness non-uniformity 0.6 μm, non-uniform period 20 mm, parallel stripe pattern) were formed to obtain an iris-colored laminate.

This laminate was slit in the same manner as in Example 1 to obtain an iris-colored gold-silver thread.

The iris color of each of the obtained iris-colored gold-silver yarns was visually observed and evaluated according to the following criteria.

◎ ‥‥‥ The iris color is rich and powerful, the gloss is outstanding and the iris pattern is extremely clear.

○ ‥‥‥ The iris color is rich in color and excellent in gloss.

△ ‥‥‥ Iris color is monotonous and gloss is poor.

× ‥‥‥ Very light iris color.

The following treatments were performed for each iris-colored gold and silver thread, and the change in iris color was visually observed, and evaluated according to the following criteria. In this evaluation, the change in the iris color before and after the processing is observed. Therefore, even if the iris color before the processing is inferior, if the iris color does not change before and after the processing, the evaluation is A
It turns out that.

A: No change in iris color.

B ‥‥‥ Abnormalities such as contamination occur in the iris color.

C ‥‥‥ Iris color disappeared.

Treatment method (1) Bleaching Treatment solution: 4 g of sodium hypochlorite, water 1 Treatment temperature: 70 ° C Treatment time: 60 minutes (2) Nylon staining Treatment solution: 1 g of glacial acetic acid, 0.5 g of amylazine D, acid dye (Diaci
d Brill. Blue BR) 5% owf, water 1 Treatment temperature: 95 ° C Treatment time: 60 minutes (3) Rayon dyeing treatment solution: 15 g of anhydrous sodium nitrate, 1 g of monogen (170T), direct dye (Direct Deep Black EX) 5 % Owf, water 1 Treatment temperature: 95 ° C Treatment time: 60 minutes (4) Wool dyeing treatment solution 1: 3.3 g of anhydrous sodium nitrate, 1 g of acetic acid, 0.5 g of aborane SC, 5% owf of acid dye (Kayalon Milling Black TLB), Water 1 Treatment temperature: 95 ° C Treatment time: 60 minutes Treatment solution 2: Acidomin super 2 g, water 1 Treatment temperature: 40 ° C Treatment time: 20 minutes (5) Reaction staining Treatment solution: 40 g of anhydrous sodium nitrate, 15 g of sodium carbonate, Reactive dye (Cibacron Brill. Red BE) 5% owf, water 1 Treatment temperature: 60 ° C Treatment time: 60 minutes (6) Silk scouring Treatment liquid: Marcel soap 3 g, hydrosulfite 0.8 g,
3.9 g of sodium silicate, water 1 Treatment temperature: 95 ° C Treatment time: 6 hours The results are shown in Table 1.

[Effect of the Invention] In the iris color laminate, the iris color is rich in color by forming an iris layer, an iris compound thin film having an uneven thickness and a resin layer having an uneven thickness. It is powerful and has excellent gloss, and has a very sharp iris pattern.

In addition, by providing an iris compound thin film layer on a plastic film via a resin undercoat layer, etc., excellent resistance to refining, bleaching and other arranging treatments of fabrics is possible, and post-dyeing processing of nylon, wool, etc. is possible. .

[Brief description of the drawings]

FIG. 1 is a schematic partial sectional view showing one embodiment of the iris-colored laminate of the present invention, and FIG. 2 is a schematic partial sectional view showing another embodiment. (Signs in the drawings) (1): transparent plastic film (2): transparent resin undercoat layer (3): iris layer (3a): iris compound thin film layer having non-uniform thickness (3b): non-uniform thickness Transparent resin layer (4): transparent resin overcoat layer

Claims (4)

(57) [Claims] 1. A laminate comprising a transparent plastic film provided with a transparent iris layer on one surface, wherein the iris layer has a thickness in the range of 5 to 100 nm and a thick portion. One kind of an iris compound thin film layer selected from the group consisting of zinc sulfide, bismuth oxide and antimony oxide, having a nonuniform thickness whose difference from a thin portion is 20 to 80 nm, and a film thickness of 0.01 to 5 μm Characterized by being laminated with a transparent resin layer having an uneven thickness, wherein the difference between the thick and thin portions is 0.1 to 1 μm. Colored laminate. 2. A transparent resin undercoat layer, an iris compound thin film layer having an uneven thickness and a transparent resin layer having an uneven thickness are provided in this order on one side of a transparent plastic film. The iris-colored laminate according to claim 1. 3. A transparent resin film having a non-uniform thickness, a iris compound thin film layer having a non-uniform thickness, and a transparent resin overcoat layer are provided on one side of a transparent plastic film in this order. The iris-colored laminate according to claim 1. 4. An iris-colored gold-silver yarn, which is a slit yarn of the iris-colored laminate according to claim 1, 2 or 3.