JPH06184930A - Interference color developing multilayer sheet - Google Patents

Abstract

PURPOSE:To prevent the interference color development from lowering by obtaining a desired interference color development securing the surface flatness of the sheet while. CONSTITUTION:The interference color developing multilayer sheet is characterized by disposing a light interference film 7 on at least one surface of a web 2 and further disposing a resin film 8 on at least one surface of the laminate of the web 2 to the light interference film 7. The light interference film 7 has a transparent layer comprising a substantially transparent thin film and can develop a color by the interference of the reflected light of light R entered from the layer front surface side on the layer front surface with the reflected light on the layer back surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interference coloring composite sheet that develops an interference color by light.

[0002]

2. Description of the Related Art As a method for obtaining an iris color, a light reflecting film, a metal compound transparent film, or a semitransparent metal vapor deposition film is laminated on one side or both sides of a transparent film or paper, and an iris color, so-called rainbow, is formed by interference of reflected rays. A method for making colors appear is known (Japanese Patent Laid-Open No. 61-15962).

However, in the above method, since the surface of the base material is flat, the difference between specular reflection and diffuse reflection is several hundred times, and the difference in brightness is about 60 times. Also, there is a drawback in that the glossiness of the iris color remarkably decreases if the viewing angle deviates slightly from the position of specular reflection.

In order to solve such a defect, 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 a monochromatic color was generated by interference of reflected light rays. A fiber cloth having an interference color has been proposed and has been already known (Japanese Patent Laid-Open No. 3-82881), in which a hue that changes in hue depending on the viewing angle between two hues and two hues or more appears.

[0005]

However, in the fiber cloth having the interference color according to the above-mentioned proposal, when the fibers constituting the cloth move or reverse during use or practical use, they are laminated on the fiber. There is also a problem in that the existing light interference film also moves, and the interference coloring property may be impaired.

Further, the fiber cloth having the interference color according to the above-mentioned proposal has unevenness of the fibers constituting the cloth as a surface morphology, so that it is possible to give a high-grade feeling, but the purpose of use is Depending on the application, flatness may be required as the form of the surface (at least one side) while obtaining the complex interference coloring as described above.

The present invention, in order to meet such needs,
In addition, in order to solve the problems described above, the desired interference coloration is achieved, the surface is flat, and the interference coloration property does not decrease or disappear due to the movement of the fibers constituting the fabric, and various functions can be added. It is intended to provide a complex interference coloring composite sheet.

[0008]

According to the interference coloring composite sheet of the present invention for this purpose, the exposed surface of the fiber exposed on at least one side of the fiber cloth reflects the incident light, the reflected light on the surface of the layer and the back surface of the layer. Is provided with a light interference film having a transparent layer formed of a substantially transparent thin film capable of developing color by interference with reflected light, and a resin film is provided on at least one surface of a laminate of the fiber cloth and the light interference film. It consists of things.

[0009]

In such an interference coloring composite sheet, color is developed by the interference between the light reflected from the front side of the light interference film and the light reflected from the back side of the light interference film. Since this optical interference film is provided on at least one side of the fiber cloth, not on a flat substrate such as film or paper, the optical interference film also forms a layer having a fine uneven surface along the minute unevenness of the cloth. Formed, the difference between specular reflection and diffuse reflection is reduced, and a high-brightness and high-saturation interference color can be obtained even when the viewing angle is changed.

By providing a resin film on the laminated body of the fiber cloth and the optical interference film, the fibers forming the cloth, particularly the fibers exposed on the surface, are substantially fixed by the resin film and moved. Since it is possible to prevent reversal and reversal, it is possible to maintain the target shape and posture of the optical interference film, and to secure a desired interference coloring property.

Further, since the surface on the side where the resin film is provided is formed into a substantially flat surface by the resin film, the demand can be satisfied when the flatness of the surface is desired.

Further, the resin film also functions as a protective film on the surface of the interference-coloring composite sheet, and can also have various functions such as moisture permeability, as shown in Examples described later.

When an interference color is to be expressed through a resin, the resin film is required to be transparent. In this case, it is necessary to use a transparent resin. On the other hand, the resin that does not express the interference color through the resin film may be transparent or opaque.

[0014]

EXAMPLES Various embodiments and specific examples of the interference color-forming composite sheet of the present invention will be described below. In the interference coloring composite sheet of the present invention, first, an optical interference film is provided on the exposed surface of the fiber exposed on at least one side of the fiber cloth. By laminating an optical interference film on a fabric having fine surface irregularities, the reflected light from the front surface of the optical interference film and the reflected light from the back surface side are finely divided in more random directions and diffusely reflected, which is more complicated. Different interference colors appear.

The optical interference film laminated on at least one surface of the fiber cloth has at least a transparent layer,
The transparent layer is capable of developing color due to interference of light incident from the front surface side with light reflected on the front surface and light reflected on the back surface.
A layer composed of a substantially transparent thin film.

The transparent layer is made of, for example, a transparent metal compound film, and its material is SiO, SiO ₂ , In.
₂ O ₃ , TiO ₂ , In ₂ O ₃ / SnO ₂ , MgF ₂ ,
At least one selected from Al ₂ O ₃ and Cr ₂ O ₃ can be mentioned.

The optical interference film can take the following various modes. First, when the light interference film is composed of only a transparent layer, as shown in FIG. 1, a transparent layer 3, for example, a transparent layer 3 composed of a transparent metal compound film is formed on one or both surfaces of a fiber cloth 2 composed of fibers 1, for example. It is provided by vapor deposition.

In the fiber cloth 2 having such a transparent layer 3 laminated, the light R incident from the front side is reflected light R _{2 on} the surface of the transparent layer 3 and reflected light R ₃ on the back surface.
That is, the color is developed by the interference of the reflected light at the boundary surface between the transparent layer and the fiber in contact with the transparent layer.

This coloring is caused by the material of the transparent layer 3 and the fiber cloth 2
It changes variously depending on its own color and the thickness of the transparent layer 3. In particular, in order to obtain a brilliant color, the thickness of the transparent layer 3 is
It is preferably 400 Å or more and 5000 Å or less.

As shown in FIG. 2, the optical interference film is provided on one side or both sides of the fiber cloth 2 from the side of the fiber cloth 2 to the reflecting layer 4.
Alternatively, the transparent layer 3 and the transparent layer 3 may be sequentially stacked to form a two-layer structure. The reflective layer 4 is made of, for example, a metal thin film having an average reflectance of 60% or more (preferably 90% or more) in the visible light region, and the material of the reflective metal film is, for example, Al, Cu, Ag, Mg, Au. , Cr,
At least one selected from Pe and Rh can be mentioned. Such a reflective layer 4 can also be provided by vapor deposition, and the thickness of the reflective metal film forming the reflective layer 4 is as follows.
It is preferably 500 Å or more.

In the fiber cloth 2 in which the reflective layer 4 and the transparent layer 3 are sequentially laminated, the light R incident from the surface side
That is, the reflected light R ₂ on the surface of the transparent layer 3 and the reflected light R ₃ on the back surface, that is, the reflected light on the boundary surface between the transparent layer 3 and the reflective layer 4 interfere with each other to develop a color.

Further, as shown in FIG. 3, the optical interference film has the reflective layer 4, the transparent layer 3 and the semitransparent layer 5 on one or both sides of the fiber cloth 2 from the side of the fiber cloth 2. It may be formed by forming a three-layer structure in which the layers are sequentially stacked. The semitransparent layer 5 is made of, for example, a semitransparent metal film having an average reflectance of 60% or less in the visible light region, and the material of the semitransparent metal film is Al, Cu, Ag, Mg, In, C.
At least one selected from r, Si, Au, and Au / Pt can be given. Such a semitransparent layer 5 can also be provided by vapor deposition, and the thickness of the semitransparent metal film forming the semitransparent layer 5 is preferably 20 Å or more and 500 Å or less.

In the fiber cloth 2 in which the reflective layer 4, the transparent layer 3 and the semitransparent layer 5 are laminated in this order, the light R incident from the front side is the surface of the semitransparent layer 5 and the surface of the transparent layer 3. ,
The reflected light R is reflected on the front surface of the reflective layer 4 (the back surface of the transparent layer 3).
₁ , R ₂ and R ₃ are generated, and the reflected lights R ₁ , R ₂ and R ₃ interfere with each other to develop an interference color.

Further, the optical interference film, as shown in FIG.
On one or both sides of the strongly twisted fiber cloth 2, from the fiber cloth 2 side,
It may be formed by forming a two-layer structure in which the transparent layer 3 and the semitransparent layer 5 are sequentially laminated. Such a fiber cloth 2
In this case, the color is produced mainly by the interference between the reflected lights R ₂ and R ₃ .

In the case of the fiber cloth having the interference color provided with the above-mentioned optical interference film, as shown in FIG.
An adhesive layer 6 may be interposed between the fiber cloth 2 and the light interference film (FIG. 5 includes the reflection layer 4, the transparent layer 3 and the semitransparent layer 5 shown in FIG. 3 as the light interference film. The optical interference film having a three-layer structure is illustrated). By providing such an adhesive layer 6, the peel strength of the light interference film from the fiber cloth 2 can be increased, and the durability of the light interference film can be increased.

The optical interference film as described above is formed, for example, as follows. In the embodiment shown in FIG. 1, the transparent layer 3 is directly vapor-deposited on at least one surface of the fiber fabric 2, and in the embodiment shown in FIG. 2, the reflective layer 4 is vapor-deposited and then the transparent layer 3 is vapor-deposited.
In the embodiment shown in FIG. 3, the reflective layer 4, the transparent layer 3 and the semi-transparent layer 5 are sequentially vapor deposited, and in the embodiment shown in FIG. 4, the transparent layer 3 and the semi-transparent layer 5 are sequentially vapor deposited and shown in FIG. In the embodiment, after the adhesive layer 6 is provided, the reflective layer 4 is provided on the adhesive layer 6 by adhesion or vapor deposition, and the transparent layer 3 and the semitransparent layer 5 are provided thereon.
Are sequentially deposited. Note that FIG. 6 is a schematic partial cross-sectional view of the cloth showing how the optical interference film is attached when there is a gap between the fibers.

After vapor deposition, the temperature is 130 ° C. or higher, preferably 170
By heat-treating at a temperature of not less than 0 ° C., the vapor-deposited film can be used as an oxide film to have a desired film composition or can be improved in film strength.

The interference color-developing composite sheet of the present invention comprises, on at least one surface of the laminate of the fiber cloth and the optical interference film as described above,
A resin film is provided.

The resin film is made of, for example, polyurethane resin, polyvinyl chloride resin or acrylic resin, and is provided by coating or laminating. Alternatively, the resin film may be bonded to the laminate of the fiber cloth and the optical interference film with an adhesive.

The resin film basically has only to be transparent enough not to impair the interference color development by the light interference film, and the thickness and the like are not particularly limited and may be determined according to the purpose.

The resin film can have various functions. For example, when it is desired to provide the surface with flatness while obtaining interference coloring by the light interference film, a flat surface can be obtained by using a resin film slightly thicker than the surface unevenness of the fiber cloth.

Further, since this resin film is bonded to the optical interference film or directly to the fiber exposed on the surface of the fiber cloth, the resin film is directly or directly through the optical interference film. Restrains (fixes) the movement of. Therefore, it is possible to prevent the movement and reversal of the fibers constituting the fabric, and prevent the movement and reversal of the optical interference film laminated on the fibers to prevent the interference coloring property from being deteriorated and disappeared.

Further, when this resin film forms the exposed surface of the interference color-forming composite sheet, it essentially functions as a protective film and protects the surface of the underlying interference film or the fiber cloth.

Furthermore, the resin film can have various other functions. For example, if the resin film is composed of a porous film having moisture permeability, a unique interference coloring composite sheet having moisture permeability while having interference color development and drape property can be obtained. Such a porous film can be formed, for example, as a polyurethane porous film.

The interference-coloring composite sheet composed of a laminate of the fiber cloth, the optical interference film, and the resin film as described above may be used alone or as a combination of the interference-coloring composite sheet and another substrate. Can be used in various embodiments.

For example, as shown in FIG. 7, the fiber cloth 2
A resin film 8 is provided on the light interference film 7 of the laminated body of the interference light and the light interference film 7 to form an interference coloring composite sheet 9, and the surface of the interference coloring composite sheet 9 on the side of the fabric 2 is provided with another base material 10. It can be attached to and used. The material of the base material 10 is not particularly limited, and any suitable material such as a porous body, metal, glass, plastic, wood, foam (for example, polystyrene foam) can be selected.

As shown in FIG. 8, a resin film 8 is provided on the surface of the fiber cloth 2 opposite to the optical interference film 7 to form an interference coloring composite sheet 9, and the light of the interference coloring composite sheet 9 is formed. The interference film 7 side can be attached to the base material 10. However, in this case, since the light that has entered from the resin film 8 side and transmitted through the fiber cloth 2 causes the interference color to be developed by the light interference film 7, the fiber cloth 2 needs to have transparency (at least anti-transparency).

Although not shown, the resin film may be provided on both sides of the laminate of the fiber cloth and the optical interference film.

A more specific embodiment will be described below. Example 1 Polyester filament yarn (warp: 50 denier x 2
4 filaments, approximately triangular cross-section fiber, weft: 75 denier x 72 filament, approximately round cross-section fiber) plain weave (warp 150)
(3 lines / inch, wefts 85 lines / inch) are made, and after the embossing, setting, alkali treatment, and finishing setting, the optical interference film having the three-layer structure shown in FIG. did.

The reflective layer is made of Al and has a film thickness of 800Å
The transparent layer is made of SiO and has a thickness of 80
The thickness was 0Å, 1000Å, 1200Å, 1500Å, and the semitransparent layer was composed of Cr and the film thickness was 30Å. An interference-coloring composite sheet was prepared by coating polydimethylpolysiloxane-based silicone as a transparent resin film on the reflective layer, the transparent layer, and the semi-transparent layer and heat-treating it at 130 ° C. for 2 minutes.

As a result, the transparent layer having a film thickness of 800 Å has a deep color mainly composed of blue, and the film thickness of 1000 Å
For those with a film thickness of 1200Å, those with a film thickness of 1200Å can be obtained with a deep color, while for those with a film thickness of 1500Å, those with a film thickness of 1500Å can be obtained. A certain color was obtained.

Example 2 Polyester filament yarn (warp: 75 denier x 7)
2 filaments, weft: 75 denier x 36 filaments) plain weave (80 warps / inch, weft 70 threads / inch)
Was prepared, and the optical interference film having the three-layer structure of the embodiment shown in FIG. 3 was vapor-deposited on one side of the textured fiber cloth, the set, the alkali treatment, the finishing set number, and the strongly twisted fiber cloth.

In Example 1, the upper semi-transparent layer of Cr
An optical interference film was formed under the same conditions as in Example 1 except that the film thickness was 70 Å.

As a result, the transparent layer having a film thickness of 800 Å has a deep color mainly composed of blue, and the film thickness is 1000 Å
For those with a film thickness of 1200Å, those with a film thickness of 1200Å can be obtained with a deep color, while for those with a film thickness of 1500Å, those with a film thickness of 1500Å can be obtained. A certain color was obtained.

Example 3 High shrink polyester filament yarn (50 denier x 2
(4 filaments, approximately round cross-section fiber, boiling water shrinkage of about 20%)
And low shrinkage polyester filament yarn (50 denier ×
48 filaments, approximately triangular cross-section fibers, boiling water shrinkage of about 7
%) And subjected to fluid mixing treatment and then twisted about 200 times / m to obtain a woven fabric (warp: about 80 / inch, weft: about 100) / Inch, texture: 2/2 twill), relax treatment, set,
Alkali treatment and finishing set were applied to make a yarn length difference mixed fiber fabric. An optical interference film having a three-layer structure as shown in FIG. 3 was vapor-deposited on one surface of the yarn length difference mixed fiber fabric.

Regarding the constitution of the three-layer film, the optical interference film was formed under the same conditions as in Example 1. The polyurethane elastomer liquid is applied to one surface of the yarn length difference mixed fiber fabric without the optical interference film, and the polyurethane elastomer liquid is dipped in the coagulation bath to cause gelation and washed with water,
Dried.

As a result, a transparent layer having a film thickness of 800 Å has a deep color mainly composed of blue, and a film thickness of 1000 Å
The one with a thickness of 1200Å has a deep color mainly consisting of green, while the one with a film thickness of 1200Å has a deep color mainly consisting of yellow, and the one with a film thickness of 1500Å has a deep color mainly consisting of red. A coloured color was obtained.

Example 4 High shrink polyester filament yarn (50 denier x 2
(4 filaments, approximately round cross-section fiber, boiling water shrinkage of about 20%)
And low shrinkage polyester filament yarn (50 denier ×
48 filaments, approximately triangular cross-section fibers, boiling water shrinkage of about 7
%) And subjected to fluid mixing treatment and then twisted about 200 times / m to obtain a woven fabric (warp: about 80 / inch, weft: about 100) / Inch, texture: 2/2 twill), relax treatment, set,
Alkali treatment and finishing set were applied to make a yarn length difference mixed fiber fabric. An optical interference film having a three-layer structure as shown in FIG. 3 was vapor-deposited on one surface of the yarn length difference mixed fiber fabric.

Regarding the constitution of the three-layer film, the optical interference film was formed under the same conditions as in Example 1. Polydimethylpolysiloxane-based silicone was coated on the deposited film as a transparent resin film and heat-treated at 130 ° C. for 2 minutes. Furthermore, a polyurethane elastomer liquid was applied to one surface of the yarn length difference mixed fiber fabric without an optical interference film, immersed in a coagulation bath for gelation, washed with water and dried to prepare an interference coloring composite sheet. .

As a result, the transparent layer having a film thickness of 800 Å has a deep color mainly composed of blue, and the film thickness is 1000 Å
The one with a thickness of 1200Å has a deep color mainly consisting of green, while the one with a film thickness of 1200Å has a deep color mainly consisting of yellow, and the one with a film thickness of 1500Å has a deep color mainly consisting of red. A coloured color was obtained.

[0051]

As described above, according to the interference coloring composite sheet of the present invention, the following effects can be obtained. (1) An interference color mainly consisting of a single hue color and two or more hue colors can be obtained by the light interference phenomenon in the light interference film without using a dye, and the interference color is rich and rich in sense. Is obtained. (2) When a light interference film is laminated on a film or paper having a flat surface, the interference color is remarkably reduced when the viewing position is slightly deviated from the specular reflection position. However, in the interference coloring composite sheet of the present invention, Since the optical interference film is provided on the top,
Even if the viewing angle is changed, the brightness of the color is not reduced. (3) In the interference coloring composite sheet of the present invention, by providing a resin film on the laminate of the fiber cloth and the optical interference film, the above-mentioned interference coloring is achieved and the flatness of the surface is ensured. can do. (4) Further, since the resin film can prevent the fibers constituting the fabric from moving or reversing, it is possible to prevent deterioration or disappearance of the interference coloring property. (5) Further, since the resin film itself can function as a protective film, the surface of the optical interference film or the fiber cloth can be appropriately protected. (6) Furthermore, the resin film can be provided with various functions, for example, moisture permeability, and desired functions can be added depending on the purpose of use and application.

[Brief description of drawings]

FIG. 1 is a schematic partial cross-sectional view of a fiber cloth and an optical interference film of an interference coloring composite sheet according to an embodiment of the present invention.

FIG. 2 is a schematic partial cross-sectional view of a fiber cloth and an optical interference film of an interference coloring composite sheet according to another embodiment of the present invention.

FIG. 3 is a schematic partial cross-sectional view of a fiber cloth and an optical interference film of an interference coloring composite sheet according to still another embodiment of the present invention.

FIG. 4 is a schematic partial cross-sectional view of a fiber cloth and an optical interference film of an interference coloring composite sheet according to still another embodiment of the present invention.

FIG. 5 is a schematic partial cross-sectional view of a fiber cloth and an optical interference film of an interference coloring composite sheet according to still another embodiment of the present invention.

FIG. 6 is a schematic partial cross-sectional view showing how an optical interference film is attached in the case of a fiber cloth having an interference color of the interference-coloring composite sheet according to the embodiment of the present invention and having a gap between the fibers.

FIG. 7 is a schematic partial cross-sectional view of a laminated body of an interference color-forming composite sheet and another base material according to an embodiment of the present invention.

FIG. 8 is a schematic partial cross-sectional view of a bonded body of an interference coloring composite sheet and another base material according to another embodiment of the present invention.

FIG. 9 is a schematic partial cross-sectional view of a fiber cloth and an optical interference film of an interference coloring composite sheet according to an embodiment of the present invention.

FIG. 10 is a schematic partial cross-sectional view of a fiber cloth and an optical interference film of an interference coloring composite sheet according to another embodiment of the present invention.

[Explanation of symbols]

1 Fiber 2 Fiber Cloth 3 Transparent Layer 4 Reflective Layer 5 Semi-Transparent Layer 6 Adhesive Layer 7 Light Interference Film 8 Resin Film 9 Interference Coloring Composite Sheet 10 Base Material R Incident Light R ₁ , R ₂ , R ₃ Reflected Light

Claims (9)

[Claims] 1. A substantially transparent thin film capable of forming a color on an exposed surface of a fiber exposed on at least one surface of a fiber cloth by interference of light incident on the surface of the layer and light reflected on the back surface of the layer. And a resin film on at least one surface of a laminate of the fiber cloth and the optical interference film. 2. The interference coloring composite sheet according to claim 1, wherein the light interference film is composed of only the transparent layer. 3. The interference-coloring composite sheet according to claim 1, wherein the light interference film is a film having a two-layer structure in which a reflective layer having an average reflectance in the visible light region of 60% or more and the transparent layer are sequentially laminated. . 4. The light interference film, a reflective layer having an average reflectance of 60% or more in a visible light region, the transparent layer, and a semitransparent layer having an average reflectance of 60% or less in the visible light region. The interference-coloring composite sheet according to claim 1, comprising a film having a three-layer structure in which the above are sequentially laminated. 5. The interference color-forming composite according to claim 1, wherein the light interference film is a film having a two-layer structure in which the transparent layer and a semitransparent layer having an average reflectance in the visible light region of 60% or less are sequentially laminated. Sheet. 6. The interference coloring composite sheet according to claim 1, wherein the resin film is a porous film. 7. The interference coloring composite sheet according to claim 1, wherein the resin film is made of a resin selected from polyurethane resins, polyvinyl chloride resins and acrylic resins. 8. The interference color-forming composite sheet according to claim 1, wherein the resin film is a coating film or a laminate film. 9. The interference coloring composite sheet according to claim 1, wherein the resin film is bonded to a laminate of the fiber cloth and the optical interference film with an adhesive.