JPS63120642A - Sheet-shaped article having interference color and manufacture thereof - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a sheet material having interference colors and a method for producing the same.

In more detail, it is a sheet-like material that can produce color using the interference phenomenon of light, and can produce color without using dyes, or can be combined with dyeing to produce deeper and more vivid colors, making it even more aesthetically pleasing. It relates to a sheet-like material that is rich in properties and its manufacturing method, and can be preferably used for home use such as clothing, bedding, interior decoration, etc., or as industrial fabric such as canvas, bag material, tent material, etc. This paper relates to a novel sheet-like product with excellent aesthetic properties and an effective method for producing the same.

(Prior Art) Conventionally, as a means for imparting color to fiber fabrics, etc., it has been common to fix organic or inorganic dyes or pigments to the interior or surface of the fibers.

Various attempts have been made to obtain colors with higher density or colors with higher saturation.
There are inventions such as those described in Japanese Patent Application Laid-open No. 042 and Japanese Patent Application Laid-Open No. 163471/1983.

Among these, the invention described in JP-A No. 59-15568 roughens the fiber surface by irradiating synthetic fiber with plasma so that the fiber has a refractive index roughly lower than that of the synthetic fiber. The aim is to improve the luminescence and durability of the composition by depositing the composition in the form of a thin film. In addition, the invention described in Japanese Patent Application Laid-Open No. 59-228042 is
A linear flat composite fiber made by laminating two or more polymers with different shrinkage characteristics in the width direction, and having at least four convex portions on one side on both sides of the fiber cross section in the length direction. and the flatness of the fiber cross section is 2.5 to 15
This relates to a fabric containing septum structure fibers in which 30% or more of the fibers on the fiber surface stand up at an angle of 45° or more with respect to the fabric surface, and The aim is to obtain an elegant color effect similar to that seen on butterfly wings.

Furthermore, the invention described in Japanese Patent Application Laid-Open No. 59-163471 applies plasma irradiation to a fiber structure in which inert fine particles are attached to the fiber surface, and the areas not covered by the fine particles are etched by the plasma to form recesses. The part covered by the fine particles is not etched to form convex portions to form unevenness on the fiber surface, and the concave and convex portions have a center-to-center distance of 0.01 between adjacent convex portions. A fiber structure whose surface is roughened so that the convex portions are from 1 to 1 micron in size and there are 1 to 200 convex portions per square micron, and this fiber structure improves the depth of color of dyed products. That's what I'm trying to do.

All of these methods aim to reduce the amount of light reflected on the surface by roughening the fiber or fabric surface in order to improve the color depth of the dyed product. However, according to the studies of the present inventors, it is impossible to obtain bright colors, which is the purpose of the present invention, and the purpose of the present invention is also different between the present invention and these known techniques. be.

The present inventors have already filed a patent application for an invention that has almost the same purpose as the present invention (Japanese Patent Application No. 164761/1982).
However, the prior invention still has some insufficiencies, and the present invention is particularly aimed at improving these issues.

(Problems to be Solved by the Invention) In view of the above-mentioned points, the object of the present invention is to provide a sheet-like material with vivid colors that could not be obtained with the prior art, which develops colors without using dyes, Alternatively, it is an object of the present invention to provide a sheet-like material that can develop deeper and more vivid colors and less fading by combining dyeing with dyes, and a method for producing the same. The present invention aims to achieve this based on a novel technical idea of utilizing phenomena, and the present invention provides a novel sheet-like material having interference colors that cannot be seen in the prior art, and the production thereof. A method is provided.

(Means for Solving the Problems) The present invention, which achieves the above-mentioned objects, has the following configuration.

That is, the sheet-like article having interference color of the present invention is a sheet-like article consisting of a laminate of a flexible film and a fiber fabric, and the following (
A slit with a substantially constant width W (microns) that satisfies the two equations (a) and (b) is substantially spaced at a substantially constant interval d (microns) that satisfies the two equations (a) and (c) below. This is a sheet-like material having an interference color characterized by having a large number of surface portions attached in parallel with each other.

0.3≦w+d≦3.0 ・・・・・・・・・ (a
)0.1≦W≦2.0 ・・・・・・・・・
(b) 0.1≦d≦2.0 ・・・・・・・・・
(c) Furthermore, in the method for producing a sheet-like article having interference colors of the present invention, at least one side of the flexible film is coated with the following [
After performing photolithography having the four steps of 1] to [4] to form a large number of slits on the surface of the film,
This is a method for producing a sheet-like article having an interference color, which comprises laminating the flexible film and a fiber fabric.

■ Resist coating ■ Resist curing treatment ■ Ultraviolet irradiation ■ Development In addition, in the above-mentioned method for producing a sheet material having interference color of the present invention, specifically, during photolithography, photo- As a mask, a substantially constant width Wo that satisfies the following two equations (d) and (e) is used.
It is preferable to use a photomask in which a large number of lines (microns) and spaces having substantially constant intervals Do (microns) satisfying the following two equations (d) and (f) are attached substantially in parallel. I'll go.

0.3≦Wo+Do≦3.0 ・・・・・・・・・'(
d) 0.1≦Wo≦2.0・・・・・・・・・
...(e)0.1≦Do≦2.0...
(Function) Hereinafter, the present invention will be explained in more detail based on the drawings and the like.

The sheet-like article of the present invention consists of a laminate of a flexible film and a fiber fabric. The flexible film is preferably made of an organic polymer, such as polyethylene terephthalate, polybutylene terephthalate,
Polyester polymers such as polyethylene 2,6 naphthalene dicarboxylate, polyolefins such as polypropylene and polyethylene, so-called nylon 6 and nylon 12
polyamides such as polyamides, polyimides having five-membered ring imide bonds in the polymer main chain, cellulose derivatives such as cellulose esters, polystyrene, polycarbonates, acrylic ester copolymers, methacrylic ester copolymers, polyvinyl chloride, polyethers, These include polyester ether and copolymers or blends thereof, but are not necessarily limited thereto.

These polymers may be preferably subjected to stretching, particularly biaxial stretching, to improve mechanical properties, thermal properties, optical properties, and dimensional stability.

These polymer films may be surface-treated or provided with a surface-modified layer to improve adhesion, if necessary.

Furthermore, such films can be transparent, opaque, or colored. It can be said that the thickness of the film is preferably 10 microns or less because it does not impair the flexibility of the fiber fabric, but it may be thicker than this as appropriate depending on the application.

The fiber fabric used in the present invention may be made of natural fibers such as cotton, wool, silk, hemp, synthetic fibers such as rayon, acetate, nylon, polyester, polyacrylonitrile, or mixtures thereof. In terms of form, woven fabrics, knitted fabrics, non-woven fabrics, etc. can be used.

When laminating the above-mentioned flexible film and fiber fabric, it is effective to employ a bonding method using an adhesive, a thermal bonding method, or the like.

At least one surface of the flexible film that can be used in the present invention has a surface portion provided with a large number of slits, which will be described in detail later. Of course, slits may be provided over the entire surface or on both sides.

Further, as for the method of lamination, it is preferable that the film surface on the side where the gaps are provided be laminated with the fiber fabric so that the surface of the film on the side where the gaps are provided remains on the front surface side even after it is made into a sheet-like product.

In the present invention, a "slit" refers to a concave portion that exists continuously with a narrow width and a certain length, and FIG. This is a schematic diagram.

In FIG. 1, a sheet-like material 1 is a laminate of a fiber cloth 11 and a flexible film 12, and a slit 2 is provided on the surface of the film 12. In the present invention, in order to achieve the intended purpose, according to the findings of the present inventors, the width W of the slit 2 is within the range of 0.1 to 2.0 microns,
Moreover, it is important that the width W of each adjacent slit 2 is approximately constant.

That is, it is important that W satisfies 0.1≦W≦2.0, and it is preferable that the fluctuation of W be within ±20% of the average value.

Furthermore, it is important that the distance d (microns) between the slits 2 and slits 2 satisfies 0.1≦d≦2.0, and the variation in d is ±20% of the average value. It is preferable that it be within

Furthermore, according to the studies of the present inventors, in order to achieve the intended purpose, it is important that the width W and the distance d of the slit 2 satisfy 0.3≦w+d≦3.0. be.

The values of w, d, and (w+d) are important for generating interference colors, and W or d exceeds 2.0 microns, or the value of (w+d) exceeds 3.0 microns. According to the findings of the present inventors, it becomes impossible to obtain clear interference colors. On the other hand, if W and d are less than 0.1 micron, it becomes difficult to control W and d to approximately constant values, which makes it difficult to obtain clear interference colors.

The slit has a depth r;
(micron), it can be said that the larger the value is, the better it is, 0.01
A preferable interference color can be obtained if the thickness is microns or more. The width W of the slit and the distance d do not need to be equal values. Although it is practical that the slits are provided parallel to the length direction of the sheet-like material, they may be provided in a direction perpendicular to the length direction of the sheet-like material or in any other direction.

Further, although it is preferable that the slits extend in a straight line, they may be curved or discontinuously cut.

Most of the slits need to be substantially parallel to each other, but some of the slits may form straight lines or curved lines that intersect with each other.

In other words, in the sheet-like article of the present invention having the above-mentioned structure, the minimum area of the surface portion in which a large number of slits are substantially parallel to each other is the area in which interference colors can be recognized by human vision. All you have to do is go. Although the slits may be provided on the entire surface of the sheet-like material, it is not necessary to do so, and they may be provided partially. For example, typically, a portion having an interference color is printed It is also possible to adopt an aspect in which the elements are arranged in a similar pattern.

Roughly, when arranging parts with slits in a printed pattern, as shown in Figure 2, the width and spacing of the slits in the A1 part are wl and dl, and the width and the spacing of the slits in the A2 part are wl and dl. W
2, d2, and roughly the width and interval of the slit in the A3' part are W3, d3, and the interference conditions of light in the A1, A2, and A3 parts are different, and the interference color emitted from each part is It is also possible to make the hue different.

In the sheet-like product of the present invention, in order to improve the durability of color development using interference phenomena, the film surface provided with the above-mentioned slits is further coated with the refractive index of the substance constituting the surface. It is effective to coat resin films with different refractive indexes. That is, the resin film can protect the slits and at the same time reduce the amount of surface reflected light from the surface of the sheet-like object.
It is possible to make the interference color even darker. The resin film may be one that fills the slits on the surface of the sheet-like object, and in fact, it has a greater effect of protecting the slits.

Of course, the sheet-like material of the present invention may be colored with dyes, pigments, etc. through treatments such as dyeing.

Furthermore, in the present invention, in order to further improve coloring properties, the surface of the sheet-like article provided with the slits may be covered with a thin film of metal such as aluminum or gold.
This can be obtained, for example, by applying metal vapor deposition to the surface of the sheet material of the present invention. In particular, when both of the above-mentioned resin film coating and metal coating are employed, the metal film may be provided by metal vapor deposition or the like, and then the resin film may be coated.

An example of the method for producing a sheet material having interference colors according to the present invention will be described below.

The sheet-like product of the present invention is typically produced by coating a photoresist on the surface of a flexible film and curing it by heating.
Furthermore, a photomask having small gaps such as a striped pattern is superimposed on the resist-coated surface of the film, and then ultraviolet rays are irradiated through the photomask, and then the film is immersed in a developer. Then, the ultraviolet irradiated portion is eluted and removed to make an uneven surface depicting a pore pattern appear on the film, and after performing a secondary curing treatment of the resist as necessary, the resist surface is coated with a fiber cloth. It can be manufactured by bonding the film and a fiber fabric on the opposite side of the bonding surface with the fiber fabric.

As a photoresist, any of negative resists that undergo crosslinking or polymerization reactions when exposed to ultraviolet rays, positive resists that decompose under ultraviolet rays, or resists for dry development that do not require a developer can be used, but among them, resists with sharp pore patterns can be used. It is preferable to use a positive resist that provides the following.

In order to uniformly apply the photoresist to the film surface, it is preferable to use a spin code method.

In addition, methods such as gravure coating can be used for particularly efficient and continuous application.

The thickness of the photoresist is suitably on the order of 0.5 to 3 microns.

Heating and curing of the photoresist can be performed using a dry heat oven, and the heating temperature and heating time may be selected appropriately depending on the type of resist and film, but the heating temperature is 60 to 120'C1 heating time. As for 5-6
Generally, it takes about 0 minutes.

A photo mask generally has a thin chromium layer on a quartz glass surface, and it is practical to use this in the present invention as well.

In order to obtain beautiful and clear interference colors, the following two patterns (d) and (e) are particularly recommended for the photo mask pattern.
A large number of lines with a substantially constant width Wo (microns) satisfying the formula and spaces with a substantially constant interval Do (microns) satisfying the following two formulas (d) and (f) are attached substantially in parallel. It is best to use a photomask made of

0.3≦Wo+Do≦3.0 −・−・−(d) 0.1
≦Wo ≦2.0 ・・・・・・・・・(e)
0.1≦Do≦2. 0 ・・・・・・・・・
・(f) In other words, FIG.
This is a model explanation of an example of a slit pattern of a mask, and the width Wo of the line 4 attached to the surface of the photo mask 3 is within the range of 0.1≦Wo≦2.0, and The fluctuation of WO is ±2 of its average value.
It is preferably within 0%.

Also, the distance Do of the space 5 between the lines
(microns) is also within the range of 0.1≦Do≦2.0, and the fluctuation of the DO is ±2 of the average value.
It is preferably within 0%. Roughly speaking, it is preferable that the above-mentioned WO and DO satisfy 0.3≦Wo+Do≦3.0.

When using a negative resist, the line width Wo and spacing Do on the photomask surface are as follows:
This corresponds to the slit width W on the surface of the sheet material and the gap d between the slits obtained by this, and when using a positive resist, the above line on the surface of the photomask. The width Wo corresponds to the interval d between the slits on the surface of the sheet-like material obtained, and the interval Do corresponds to the slit width W.

The aesthetics of the sheet-like article of the present invention can be improved by providing fine gaps on the sheet-like article surface and then coating the sheet-like article surface with a resin film having a lower refractive index than the material constituting the sheet-like article surface. It is possible to further improve the pores and prevent the slits from collapsing, and is thus practically effective.

(Example) Hereinafter, the specific structure and effects of the present invention will be explained using examples.

A positive resist (Microposit 111S manufactured by Sibley Far East) was coated on one side of a 6 micron thick polyester film by a spin code method. The rotation speed of the spinner was 4000 times/min, and the rotation time was 25 seconds. The resist thickness was 1 micron.

Place this film in a dry heat oven and heat to 90°C.
The resist was cured by heating for 20 minutes.

After this film was allowed to cool naturally, a photomask with a striped pattern with a line width of 0.5 microns and a space width of 0.5 microns was placed on the resist surface.
The resist surface was exposed to ultraviolet light through a photomask. The peak wavelength of the ultraviolet rays was 360 millimicrons, and the exposure time was 5 seconds.

Thereafter, using Microposite 303A manufactured by Sibley Far East Co., Ltd. diluted with pure water to a concentration of 20% as a developer, development was carried out at a developer temperature of 22° C. for a development time of 60 seconds, and immediately washed with water. After roughening, the film was placed in a dry heat oven and subjected to secondary curing at a temperature of 60° C. and a heating time of 10 minutes. On the film thus obtained, there are 0.5 micron wide and 1 micron deep slits.
They were formed in regular rows in a straight line and in parallel at intervals of 0.5 microns.

The resist surface of this film was set as the upper surface, and taffeta, which was woven with nylon filaments in a plain weave and dyed dark blue, was placed below the film, and the joint surfaces were adhered to form a sheet-like product.

The color of the thus obtained sheet-like material changed depending on the viewing direction, and interference colors with extremely good clarity were obtained.

(Effects of the Invention) According to the present invention as described above, it is possible to obtain a fabric that develops color through the interference phenomenon of light without using dyes, and an unprecedented novel sheet whose hue changes depending on the viewing direction. It is possible to obtain a similar product.

Furthermore, by combining coloring with conventional dyes and pigments, it is possible to obtain deep colors that cannot be obtained with these dyes and pigments alone, and deep colors with subtle changes in hue. Further, according to the present invention, it is possible to obtain a color with high fastness, that is, a color that hardly changes over time.

Further, according to the method of the present invention, a large number of sheet-like products having interference colors of the same quality can be manufactured with good reproducibility.

In addition, compared to the prior application method (Japanese Patent Application No. 60-164761) in which slits are directly applied to the fabric surface, the surface on which slits can be applied is flat, so the area on which the slits can be applied is larger, resulting in a clearer interference color. can be obtained.

[Brief explanation of the drawing]

FIG. 1 schematically shows an example of the morphology of pores existing in a sheet-like material according to the present invention. FIG. 2 is a schematic diagram illustrating an example of an embodiment of a sheet-like article according to the present invention, in which portions having gaps are arranged in a printed pattern. FIG. 3 is a model illustration of an example of a slit pattern of a photo mask preferably used in the method of manufacturing a sheet-like material having interference colors according to the present invention. 1: Sheet material 2: Slit 3: Photo mask (quartz glass) 4: Line attached to the photo mask surface Width d: Spacing between the slits r: Depth of the slits Width of the 2nd line 4 Do Distance between the 2nd line 4 and the adjacent line 4 Patent applicant
Toshi Co., Ltd. Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] (1) A sheet-like product consisting of a laminate of a flexible film and a fiber fabric, wherein at least one side of the flexible film is provided with two types of the following (a) and (b). A surface on which a large number of slits with a substantially constant width W (microns) satisfying 1. A sheet-like article having an interference color, the sheet-like article having an interference color. 0.3≦w+d≦3.0 (a) 0.
1≦w≦2.0 (b) 0.01≦d
≦2.0・・・・・・(c)(2) Depth of slit r
A sheet-like material having an interference color according to claim (1), wherein: is 0.01 micron or more. (3) The surface portion provided with the slits is covered with a resin film having a refractive index different from the refractive index of the substance constituting the surface. 1
) or (2). (4) Claim (1), characterized in that the surface portion where the slits are provided is covered with a metal film;
A sheet-like article having an interference color according to item (2) or item (3). (5) On at least one side of the flexible film, the following [1]
Having an interference color characterized by performing photolithography having the four steps of ~[4] to form a large number of slits on the surface of the film, and then laminating the flexible film and a fiber fabric. A method for manufacturing a sheet-like product. [1] Resist coating [2] Resist curing treatment [3] Ultraviolet irradiation [4] Development (6) During photolithography, the following (d) and (e) can be used as a photo mask during the ultraviolet irradiation step of [3]
A line with a substantially constant width W_0 (microns) that satisfies the following two formulas and a large number of spaces with a substantially constant interval D_0 (microns) that satisfies the following two formulas (d) and (f) are substantially parallel to each other. A method for manufacturing a sheet-like article having interference colors according to claim (5), characterized in that an attached photomask is used. 0.3≦W_0+D_0≦3.0・・・・・・・・・(
d) 0.1≦W_0≦2.0 (e)
0.1≦D_0≦2.0 (f) (7
) Claim (5) or (6), characterized in that the surface of the flexible film subjected to photolithography processing is coated with a resin having a refractive index different from that of the resist. A method for producing a sheet material having the interference color described above.