JPH07189122A - Sheet-like material with interference color - Google Patents

Abstract

(57) [Summary] [Structure] A sheet material having an interference color in which a reflective metal film, a transparent metal compound film, and a semitransparent metal film are sequentially laminated on at least one surface of the sheet material from the side of the sheet material. A sheet material having an interference color, wherein the reflective metal film is made of at least one selected from Ti, Ni, Co, and Pt. Also, a sheet-like material having an interference color in which the above-mentioned film is laminated in this order from the sheet-like material side to a semitransparent metal film, a transparent metal compound film, and a reflective metal film. [Effect] The material of the reflective metal film is Ti, Ni, Co, Pt.
As a result, a strong three-layer structure film is formed, and high washing resistance and abrasion resistance can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet material having an interference color. More specifically, the present invention relates to a sheet-like material having a monochromatic color and an interference color of two or more hue colors without the need for dyeing or coloring based on dyeing.

[0002]

2. Description of the Related Art The applicant of the present invention previously laminated a light-reflecting film, a metal compound transparent film, and a semi-transparent metal vapor deposition film on one surface of a fiber cloth, and produced a monochromatic color and two or more hues by interference of reflected light. A sheet-like material having an interference color, which allows a color to change its hue depending on the viewing angle, has been submitted and is already known (JP-A-3-82881). However, the material of the reflective metal film vapor-deposited here has a problem that the vapor-deposited three-layer structure film is likely to cause film cracking from the reflective metal film due to friction or bending.

[0003]

SUMMARY OF THE INVENTION The object of the present invention is to provide an interference color having excellent durability of the three-layer structure film in which the above-mentioned drawbacks such as film detachment caused by friction and bending of the three-layer structure film are less likely to occur. It is to provide a sheet.

[0004]

In order to achieve the above-mentioned object, the present invention has the following constitution.

That is, in a sheet material having an interference color, in which a reflective metal film, a transparent metal compound film, and a semitransparent metal film are sequentially laminated on at least one surface of the sheet material from the sheet side, the reflective metal The film is Ti, Ni, C
It is a sheet-like material having an interference color characterized by comprising at least one selected from o and Pt.

Further, in a sheet-like material having an interference color, in which a semitransparent metal film, a transparent metal compound film, and a reflective metal film are sequentially laminated on one surface of the sheet-like material from the side of the sheet-like material, the reflective metal film Is a sheet-like material having an interference color characterized by comprising at least one selected from Ti, Ni, Co and Pt.

The present invention will be described in detail below.

The present invention is based on the previously proposed Japanese Patent Laid-Open No. 3-828.
In order to improve the durability of the interference coloring film having the three-layer structure of Japanese Patent Publication No. 81, the composition of the interference coloring film was examined in detail, and it was made of at least one material selected from Ti, Ni, Co and Pt. The present invention has been found out that it is important to form the reflective metal film as an interference coloring film in order to improve the durability of the interference coloring film.

The film durability (film strength) of the interference coloring film using the reflective metal film made of each material is shown in comparison with Table 1. As shown in Table 1, only when using Ti, Ni, Co and Pt of the present invention, the target high washing resistance and abrasion resistance can be obtained.

[0010]

[Table 1] In addition, the conditions of the test shown in Table 1 were vapor-deposition of the following reflective metal film / transparent metal compound film / semi-transparent metal film by the induction heating vacuum evaporation method. The thickness of the reflective metal film below is 7
0 nm, the transparent metal compound film (SiO) was 100 nm, and the semitransparent metal film (Cr) was 5 nm. After each vapor deposition, heat treatment was performed at 170 ° C for 2 minutes to increase the strength of the vapor deposition film, and then dimethylpolysiloxane-based silicone was applied as a protective film, and heat treatment was performed at 130 ° C for 2 minutes. Was evaluated.

Deposition film (reflection metal film / transparent metal compound film /
(Translucent metal film): Level 1 Al / SiO / Cr level 2 Cu / SiO / Cr level 3 Cr / SiO / Cr level 4 Ti / SiO / Cr level 5 Ni / SiO / Cr level 6 Co / SiO / Cr level 7 Wash resistance of Pt / SiO / Cr film: abrasion resistance according to JIS-L-1096 L-5 method: sheet according to JIS-L-0849 II type sheet: plain woven fabric using polyester filaments (see Example 1 described later and The same)

The present invention will be described in more detail below.

Examples of the fiber cloth of the present invention include known knitted and woven fabrics, as well as non-woven fabrics and prepregs in which fibers are arranged.

Examples of fibers constituting these cloths include synthetic fibers (polyester, polyamide, polyacrylic, vinylon, rayon, etc.), natural fibers (silk, cotton, hemp, etc.), glass fibers, inorganic fibers and the like. . Also,
Either long fibers or short fibers may be used, preferably long fibers are preferable, and in the case of increasing the brightness, it is preferable to carry out calendering.

FIG. 1 is a schematic view showing a laminated state of thin films as an example of the sheet-like material according to the present invention.

As shown in FIG. 1, the sheet-like material having the interference color of the present invention has a reflective metal film 2, a transparent metal compound film 3, and a reflective metal film 2 on at least one surface of the sheet-like material 1 from the sheet-like material side.
The semitransparent metal film 4 is sequentially laminated.

On the other hand, the interference coloring film is a sheet having an interference color in which a semi-transparent metal film, a transparent metal compound film, and a reflection metal film are sequentially laminated from the sheet-like object side (the layers are laminated in the reverse order of the lamination order of FIG. 1). It may be a thing. This is a sheet-shaped material in which interference coloring can be seen through the transparent sheet-shaped material, especially when a transparent material is adopted as the sheet-shaped material.

FIG. 2 is a schematic view showing a laminated state of thin films of another example of the sheet-like material according to the present invention. That is,
In the sheet-shaped article having the interference color of the present invention, the adhesive layer 5 may be interposed between the sheet-shaped article 1 and the film having the three-layer structure. By providing such an adhesive layer 5, the peel strength of the film having a three-layer structure from the sheet 1 can be increased, and the durability of the film having a three-layer structure can be increased.

In order to improve the durability of color development,
It is also effective to coat a three-layered thin film surface with a highly transparent protective film having a refractive index close to that of the thin film substance. With such a protective film, not only the thin film can be protected, but also the amount of light reflected from the surface of the fabric can be reduced and the interference color can be further darkened.

Next, the thin film forming the laminated film that exhibits interference coloring will be described.

In the present invention, the material of the reflective metal film is T
It is important to use at least one selected from i, Ni, Co and Pt. Further, these reflective metal films have a reflectance average value Rp _3av of 50 in the visible light region.
% Or more, or the average transmittance T _3av is preferably 50% or less. More preferably, the average reflectance R
p _3av is 90% or more, or average transmittance T _3av is 1
It is 0% or less.

The material of the transparent metal compound film is Si.
O, SiO ₂ , In ₂ O ₃ , TiO, TiO ₂ , indium tin oxide (ITO), MgF ₂ , Al ₂ O ₃ , Sn
At least one selected from O ₂ is preferably used. These transparent metal compound films preferably have a reflectance average value Rp _2av of 60% or less in the visible light region and a transmittance average value T _2av of 40% or more. More preferably, the reflectance average value Rp _2av is 30% or less,
The average transmittance T _2av is 70% or more.

Further, the material of the semitransparent metal film is preferably at least one selected from Ti, Ni, Co, Pt, Cr and Si. These semi-transparent metal film preferably reflectance average Rp _1AV in the visible light region is 40% or less, or transmittance mean T _{1a v} is 60% or more. More preferably, the reflectance average value Rp _1av
Is 20% or less, and the average transmittance T _1av is 80% or more.

FIG. 3 shows the reflected lights R ₁ , R _{2 on} the respective films of the reflective metal film 2, the transparent metal compound film 3, and the semitransparent metal film 4.
It is an explanatory view for explaining the R _3.

In FIG. 3, in the present invention, a part of the light R incident from the surface is reflected to generate a reflected light R _1, and a part of the light R is transmitted through the semitransparent metal film 4 with a transmittance T _1. And reaches the transparent metal compound film 3. Let the light intensity of the incident light R be I
_0, the a to reach the _{(I 0 × T 1/100} ) light transparent metal compound film 3 having a strength. Then similarly, resulting reflected light R ₂ is reflected part by the surface of the transparent metal compound film 3 and partly reaches through the transparent metal compound film 3 in the transmittance T ₂ to the reflective metal film 2 To do. That is, (I
₀ × T _1/100 × light having an intensity of T _2/100) is to reach the reflective metal film 2. And the reflective metal film 2
A part of the light that has arrived at is reflected to generate a reflected light R _3, and a part of the light is transmitted through the reflective metal film 2 at the transmittance T ₃ .

Therefore, assuming that the light intensities of the reflected light R ₁ , the reflected light R ₂ , and the reflected light R ₃ are I _R1 , I _R2 , and I _R3 , the reflectance is defined as follows.

Reflectivity Rp ₁ [%] = 10 of the semitransparent metal film
0 × I _R1 / I ₀ Rp ₂ [%] of transparent metal compound film = 100 × I _R2 / (I
_{0 × T 1/100) Rp} 3 [%] of the reflective metal film _{= 100 × I R3 / (I} 0 × T
_{1/100 × T 2/100} )

In the present invention, the average reflectance Rp _1av of the semitransparent metal film is the average reflectance Rp of the transparent metal compound film.
It is desirable close to the minimum in order to increase the reflectivity power of reflectance average Rp _3Av of _2AV and reflective metal film, Rp _2AV, the reflecting action to the extent that attained balanced reflectivity power of Rp _3Av I have. The average reflectance value Rp _3av is preferably total reflection.

Further, the average transmittance T _{1av of the} semitransparent metal film
Is preferably maximally high in order to increase the reflectance power of the average transmittance T _2av of the transparent metal compound film and the average reflectance Rp _3av of the reflective metal film, and the average transmittance T _2av is , Reflectance average value Rp _2av , reflectance average value R
It has a transmissive function in a range where the reflectance power of p _3av can be balanced. Further, it is desirable that the transmittance average value T _3av is close to the minimum value in order to increase the reflectance average value Rp _3av .

Next, the principle of development of interference coloring in the present invention will be briefly described.

Interference due to the laminated film of the sheet-like material of the present invention is roughly classified into three types.

Interference due to reflection of the upper semi-transparent metal film surface and reflection of the middle transparent metal compound film surface (interference between R ₁ and R ₂ ) Reflection of the upper semi-transparent metal film surface and lower reflection metal film surface Interference due to reflection of (interference between R ₁ and R ₃ ) Interference due to reflection of the middle transparent metal compound film surface and reflection of the lower reflection metal film surface (interference between R ₂ and R ₃ ) Since the semi-transparent metal film surface is very thin, interference hardly occurs, so it can be ignored.

On the other hand, since the interferences of (1) and (2) have high reflectance powers, the interference colors become interference colors, and the interference colors become positive and the interference colors become strong.

Further, when the film thickness of the transparent metal compound film surface of the middle layer is thin, a monochromatic color is obtained, but when the film thickness of the semitransparent metal compound film of the middle layer is increased (for example, 20 nm or more), there is directionality. Two hue colors or more interference colors.

Further, by controlling the transparent metal compound film of the middle layer to a predetermined thickness, desired monochromatic colors of, for example, blue, green, yellow, and red can be developed. Then, by increasing the thickness, two hue colors can be obtained.

Although the thickness of the reflective metal film depends on the material of the reflective metal film, it is preferably 30 nm or more from the viewpoint of _{making the} reflectance average value Rp _3av 50% or more. From the viewpoint of preventing cracking, the thickness is preferably 70 nm or less.

The three-layer thin film may be applied to the entire surface of the sheet-like material, but it is not always necessary and may be applied partially.

For example, when an interference coloring film is provided on a part of the exposed surface of the fiber exposed on at least one side of the fiber cloth, a sheet-like material having an interference color on a part of the surface is obtained, In the case of a cloth, napped product, or the like having irregularities on its surface, a sheet-like material having a partial interference color is obtained when the above interference coloring film is applied to the convex portions of the surface, the tips of the hair, and the like.

It is also possible to adopt a mode in which the portions having the interference color are arranged so as to exhibit a pattern like print dyeing.

The point is that the minimum area of the surface portion that causes interference coloring should be an area that allows humans to visually recognize the interference color.

FIG. 4 shows the spectral characteristics showing the relationship between specular reflection and diffuse reflection of the fiber cloth.

FIG. 5 shows the spectral characteristics showing the relationship between specular reflection and diffuse reflection of the film.

In the case of a fiber cloth, as shown in FIG. 4, the difference between specular reflection and diffuse reflection is small, and the spread of diffuse reflected light is large. This means that, as shown in FIG. 6, the diffusely reflected light is radially diffusely reflected with respect to the incident light and spreads in an elliptical shape. That is, since the fiber surface has a curved surface as seen in FIG. 8, the reflected light r ₁ , r ₂ ,
r ₃ and r ₄ diffuse radially. Moreover, in reality, a large number of incident lights from various angles cause more complex diffuse reflection. Therefore, even if the viewing angle changes, the color brilliance does not decrease much and does not change.

In the case of the film, only specular reflection is provided as shown in FIG. This means that, as shown in FIG. 7, the specularly reflected light having a reflection angle of 45 ° with respect to the incident light is strong and there is almost no diffuse reflection. That is, as shown in FIG. 9, the film surface has specular reflection light r ′ ₁ , r ′ ₂ ,
r _'3, r' is because it is seen as a ₄ only. Also,
Even a slight deviation from the position of those specularly reflected light causes a great change in the brightness of the color.

Next, the production method of the present invention will be described with respect to the fiber cloth.

Examples of the fiber cloth of the present invention include known knitted and woven fabrics as well as non-woven fabrics and prepregs in which fibers are arranged.

Examples of fibers constituting these cloths include synthetic fibers (polyester, polyamide, polyacrylic, vinylon, rayon, etc.), natural fibers (silk, cotton, hemp, etc.), glass fibers, inorganic fibers, etc. Furthermore, the compound yarn of the above-mentioned yarn, the shrinkage difference mixed fiber yarn, etc. can be mentioned. Either long fibers or short fibers may be used, but long fibers are preferable. Further, when increasing the brightness, it is preferable to carry out calendar processing.

The fiber cloth may be woven or knitted. In the case of woven fabrics, plain weave, satin, twill and other variable texture fabrics, decin, georgette, palace strong twist fabrics, fabrics with irregularities on the surface, napped products, etc. Those exhibiting different interference colors are obtained. Furthermore, when a transparent woven fabric or a dyed woven fabric is used, it is possible to obtain a sheet-shaped article having an interference color having different effects due to the interaction with the transparency and the dyed color.

The sheet material of the present invention may be a composite sheet formed by laminating a fiber cloth on a film material.

In the sheet material of the present invention, the fiber cloth is first subjected to desired pretreatments such as removal of the finishing oil agent by scouring and smoothing of the surface by calendering, and then a thin film is applied to the surface of the fiber cloth. is there.

To give a specific example, an adhesive is preferably provided on at least one side of the fiber cloth between the fiber cloth and the film having the three-layer structure to enhance the peel strength of the film having the three-layer structure from the fiber cloth. Then, the reflective metal film, the transparent metal compound film, and the semitransparent metal film are adjusted to have a predetermined film thickness, and vapor deposition is performed sequentially (or vice versa).

When heat treatment is preferably performed at 130 ° C. or higher, more preferably 170 ° C. or higher after vapor deposition, the upper layer film becomes an oxide film, the film strength is improved, and the interference color of the fiber cloth becomes more vivid, resulting in a metallic luster. Can be It is also possible to prevent the oxidation of the upper layer film due to a change with time from causing a change in the refractive index and the interference color from being discolored as a result.

Further, in order to protect the thin film, after the vapor deposition heat treatment, a protective film may be coated on the thin film if necessary.

The fiber cloth having an interference color of the present invention is used in the field of clothing such as sportswear, casual wear, stage costumes, pantyhose, tights, shirts, blouses, scarves, ties, ribbons, belts, futon covers, curtains and rugs. , Stage curtain, mausoleum, packaging ribbon,
Excellent versatility such as one-point marks, parasols, bedding such as handbags, interiors, daily necessities, etc.

When a film is used as the sheet-like material, the vapor deposition film may be provided on the film surface as described above.

[0056]

EXAMPLES The present invention will be described in more detail below with reference to examples.

Example 1 A polyester filament yarn (50 denier warp yarn × 18 filaments, weft 75 denier × 36 filaments) was plain woven (110 warps / inch,
The woven fabric (horizontal 81 pieces / inch) was scouring-finished, and then Ti was vapor-deposited on one surface of the woven fabric as a reflective metal film so as to have a film thickness of 70 nm, thereby preparing four kinds.

SiO was vapor-deposited on the four types of reflective metal films by induction heating vacuum vapor deposition so as to have film thicknesses of 100 nm, 120 nm, 150 nm, and 200 nm, respectively, and a transparent metal compound film was laminated.

Next, the film thickness is 100 nm, 120 nm, 150
nm, 200nm thick transparent metal compound film with Cr film thickness of 5nm
To form a semi-transparent metal film.

Thereafter, in order to increase the strength of the film, 170 ° C. ×
Heat treated for 2 minutes.

Further, dimethylpolysiloxane type silicone was applied as a protective film from the above and heat treatment was carried out at 130 ° C. for 2 minutes.

As shown in Table 2, the fiber cloth thus obtained exhibited a very clear monochromatic color due to the light interference phenomenon. And the thing excellent in durability, such as washing resistance and abrasion resistance, was obtained.

[0063]

[Table 2] [Example 2] Vapor deposition, heat treatment, and protective film laminating treatment were performed under the same conditions as in Example 1 except that Ni was vapor-deposited to a film thickness of 70 nm as the lower reflective metal film.

As shown in Table 3, the fiber cloth thus obtained exhibited a very clear monochromatic color due to the light interference phenomenon. And the thing excellent in durability, such as washing resistance and abrasion resistance, was obtained.

[0065]

[Table 3] [Example 3] Polyester filament yarn (50 denier-12 filament) supplied at a yarn speed of 525 m / min.
Then, polyester filament yarns (100 denier × 96 filaments) supplied at a yarn speed of 600 m / min were aligned and the fluid mixture treatment was taken at 500 m / min to obtain a yarn length difference mixed yarn. A reflective metal film, a transparent metal compound film, and a semitransparent metal film were sequentially deposited, heat-treated and laminated with a protective film on one surface of this yarn length difference mixed fiber fabric under the same conditions as in Example 1.

As shown in Table 4, the fiber cloth thus obtained exhibited a very clear monochromatic color due to the phenomenon of light interference. And the thing excellent in durability, such as washing resistance and abrasion resistance, was obtained.

[0067]

[Table 4] [Example 4] Polyester filament yarn (warp yarn 50 denier-24 filament; approximately triangular cross-section fiber, weft yarn 75)
A taffeta using a denier-72 filament; a fiber having a substantially circular cross section) was prepared, and this was squeezed to form a fabric having unevenness on the surface. With reflective metal film, transparent metal compound film,
A semitransparent metal film was sequentially deposited, heat-treated, and laminated with a protective film.

As shown in Table 5, the obtained cloth exhibited a remarkably vivid and deeply changed color due to the light interference phenomenon. And the thing excellent in durability, such as washing resistance and abrasion resistance, was obtained.

[0069]

[Table 5] [Example 5] A woven fabric (warp: about 100 yarns / inch) using a super bright yarn of polyester filament (warp: 200 denier-10 filament, substantially round cross-section fiber, weft: 400 denier-20 filament, substantially round cross-section fiber) ,
Weft: Approximately 95 yarns / inch, texture: plain weave) is made, and a finishing set is applied to prepare a transparent cloth. The lamination order is from one side of this cloth to a semitransparent metal film, a transparent metal compound film,
The layers were laminated by the induction heating vacuum deposition method in the same manner as in Example 1 except that the reflective metal film was arranged in this order.

The semitransparent metal film was made of Cr and had a film thickness of 3 nm. The transparent metal compound film is made of SiO and has a film thickness of 80 nm, 100 nm, 120 nm, 150 nm, respectively.
Was created. The reflective metal film was made of Ti and had a film thickness of 80 nm. After these semi-transparent layer, transparent layer and reflective layer are sequentially deposited, heat treatment is performed under the condition of 170 ° C. × 2 minutes, and then polydimethylpolysiloxane-based silicone is coated as a protective film on the surface of 130 ° C. × 2.
Heat treatment was performed under the condition of minutes.

In the obtained cloth, a transparent layer having a thickness of 80 nm gives a deep color mainly composed of blue.
The one with 0 nm has a deep color, mainly green.
The film having a film thickness of 120 nm produced a deep color mainly composed of yellow, and the film having a film thickness of 150 nm obtained a deep color composed mainly of red.

The obtained transparent cloth has a complex change in hue depending on the viewing angle, and at the same time, an excellent feeling of sheerness and weaving is exhibited, and a high-grade color tone is obtained, and the wash resistance and abrasion resistance are high. It was also obtained that had excellent durability such as.

[0073]

The fiber cloth having the interference color of the present invention has the following effects.

(1) The material of the reflective metal film is Ti, Ni,
By using Co and Pt, a strong three-layer structure film can be formed, and high washing resistance and abrasion resistance can be obtained.

(2) Monochromatic and bichromatic colors can be freely obtained by the phenomenon of light interference without using a dye.

(3) High lightness and high saturation that cannot be obtained by conventional dyes and pigments, and even if two or more hues are used, the hues are independent and do not become dark.

(4) Depending on the adjustment of each film thickness and the viewing angle,
Various interference colors can be expressed.

(5) The heat treatment makes it possible to express a clear metallic luster.

(6) No fading occurs.

(7) Since the fiber cloth does not impair the original functions of the fiber such as hygroscopicity and air-permeability, it is excellent in versatility for clothing, interiors, industrial materials and the like.

[Brief description of drawings]

FIG. 1 is a schematic view showing a laminated state of thin films as an example of a sheet-like material according to the present invention.

FIG. 2 is a schematic view showing a laminated state of thin films of another example of the sheet-like material according to the present invention.

FIG. 3 is an explanatory diagram illustrating reflected light from each film laminated on the sheet-like material according to the present invention.

FIG. 4 is a spectral characteristic showing a relationship between regular reflection and diffuse reflection of a fiber cloth.

FIG. 5 is a spectral characteristic showing the relationship between specular reflection and diffuse reflection of the film.

FIG. 6 is a reflection distribution diagram of the fiber cloth according to the present invention.

FIG. 7 is a reflection distribution map of the film according to the present invention.

FIG. 8 is a reflection mechanism diagram of a fiber cloth.

FIG. 9 is a reflection mechanism diagram of a film.

[Explanation of symbols]

1: Sheet material 2: Reflective metal film 3: Transparent metal compound film 4: Semitransparent metal film 5: Adhesive layer R: Incident light R ₁ , R ₂ , R ₃ : Reflected light T ₁ , T ₂ , T ₃ : transmittance _{d 1, d 2, d 3} : thickness _{r 1, r 2, r 3} , r 4: diffuse reflected light _{r '1, r' 2,} r '3, r' 4: specular reflection light

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location D06Q 1/04 // D06M 101: 32

Claims (10)

[Claims] 1. A sheet metal having an interference color in which a reflective metal film, a transparent metal compound film, and a semitransparent metal film are sequentially laminated on at least one surface of the sheet metal from the side of the sheet metal. A sheet-like material having an interference color, wherein the film is made of at least one selected from Ti, Ni, Co, and Pt. 2. A sheet-like material having an interference color in which a semi-transparent metal film, a transparent metal compound film, and a reflective metal film are sequentially laminated on one surface of the sheet-like material from the side of the sheet-like material. Is a sheet material having an interference color, characterized in that it comprises at least one selected from Ti, Ni, Co and Pt. 3. A transparent metal compound film comprising SiO, SiO ₂ ,
_{2. At} least one selected from In ₂ O ₃ , TiO, TiO ₂ , indium tin oxide (ITO), MgF ₂ , Al ₂ O ₃ and SnO _2.
Or a sheet-like material having the interference color according to 2. 4. The semitransparent metal film is made of Ti, Ni, Co, P.
The sheet material having an interference color according to claim 1 or 2, comprising at least one selected from t, Cr, Al, Si, Ag, and Au. 5. The sheet-like material having an interference color according to claim 1, 2, 3 or 4, wherein the sheet-like material is a film. 6. The sheet-like material having an interference color according to claim 1, wherein the sheet-like material is a fiber cloth. 7. The sheet-like material having an interference color according to claim 6, wherein a part of the exposed surface of the fiber exposed on at least one side of the fiber cloth has an interference color. 8. The sheet-like article having an interference color according to claim 1, wherein the reflective metal film has a film thickness of 30 nm to 70 nm. 9. A semi-transparent metal film having a reflectance average value Rp _{1av of} 40% or less, a transparent metal compound film reflectance average value Rp _2av of 60% or less, and a reflection metal film reflectance average value Rp _3av in a visible light region. Is 50% or more, and the sheet material having an interference color according to any one of claims 1 to 8. 10. A semitransparent metal film having a transmittance average value T _1av of 60% or more, a transparent metal compound film transmittance average value T _2av of 40% or more and a reflection metal film transmittance average value T in the visible light region. _The sheet having an interference color according to any one of claims 1 to 9, wherein _3av is 50% or less.