JPH073652A - Production of fiber sheet - Google Patents

Abstract

PURPOSE:To obtain a novel fiber sheet having both of coloring due to dye and coloring due to interference of light and observed so as to expose a part dyed by dye (pigment) by an angle of incident light. CONSTITUTION:This method for producing a fiber sheet is characterized by forming a metal layer having a film thickness B (mum) of the formula 0.01<=B<=-(3.37X10<-4>)A+4.03X10<-2> on at least one side of a base fabric having ground dyeing part or ground pattern part satisfying the formula 1<=A<=90 in L* value concentration A by a vacuum deposition method or a spattering method and further forming an organic three-dimensionally crosslinked thin film layer having 1.35-2.00 refractive index and 0.05-1mum thickness on the upper surface of the metal layer by a plasma polymerization method.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fiber sheet in which color development by a dye and color development by light interference are combined, and a dye (pigment) is produced depending on the angle of light.
The present invention relates to a method for producing a new fiber sheet for obtaining a new fiber sheet in which a dyed portion appears to float.

[0002]

2. Description of the Related Art Various methods have been hitherto mentioned as methods for obtaining interference colors. For example, as means for imparting an interference color to a film, a molded product, etc., Japanese Patent Publication No.
Japanese Patent Publication, Japanese Patent Publication No. 51-33589, Japanese Patent Publication No. 3-2
There are Japanese Patent Publication No. 079, Japanese Patent Publication No. 3-4040, etc.,
All of these are light reflection layer, interference layer, semi-transparent (transparent)
It is composed of three layers, and it is possible to give a moderate interference color to a film or a molded product, but the application to a fiber sheet is not perfect. Further, in the case of forming three layers, it takes much labor and time and the productivity is poor.

Recently, processing technology Vol. 25, N
O. 12 (1990) 761 describes a method of imparting an interference color to a fiber sheet. In this method, the first layer is a titanium thin film that has good adhesion to fibers and has an appropriate reflectance,
The interference color is developed by forming a transparent thin film of titanium oxide or the like on the second layer by sputtering.
However, in this method, a film thickness of 0.05 to 0.2 μm is required to develop the interference color in the second layer thin film, and such a film is formed using a high performance magnetron sputtering apparatus. Requires one hour or more of sputtering time, and in terms of manufacturing cost and low productivity,
Industrially, it must be said that its practical application is extremely difficult.

The inventors of the present invention have previously disclosed in Japanese Patent Laid-Open No. 4-31
In Japanese Patent No. 6677, a metal thin film layer and an organic three-dimensionally crosslinked thin film layer having a specific refractive index and film thickness formed by a plasma polymerization method are formed on at least one surface of a fiber sheet.
The invention has been proposed which is advantageous in that a fiber sheet having an interference coloring property by light can be produced in a short time, that is, industrially adopted.

However, in the conventional techniques including the above, the object to which the interference light is applied is, of course, a film or a molded article, and even if the fiber sheet is a fiber sheet, the interference light is expressed on the sheet. Since the metal layer is formed as the basic base layer (light reflecting layer), this metal layer covers the surface of the target sheet, that is, the hue and pattern of the target sheet are masked. It was not intended to reflect the color and pattern of the target sheet as the color and pattern of the final product. Therefore, the interference colors produced by the combination of the metal layer and the transparent thin film layer thereon are different, and although the hue is slightly changed depending on the viewing angle, so-called iridescent coloring is observed, but the interference is caused. The color development is just a simple interference color development obtained by the combination of the metal layer and the transparent thin film layer thereabove, and the hue, pattern, etc. of the target sheet such as the fiber sheet on which the metal layer is placed are final. It does not reflect that of the product.

[0006]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to create and provide a novel fiber sheet having not only the color development by light interference but also the color development by light interference and the color development by dyes or pigments. Is. For that purpose, the present invention relates to a method for producing the fiber sheet, in which the conditions of the constituting base fabric, the conditions of the metal film to be placed thereon, the conditions of the transparent thin film and the like have to be investigated. Further, the present invention is intended to provide a method for producing an optical interference coloring fiber sheet which can be produced at a line speed up to a level capable of industrial production and can be produced at a low cost, and further has little change in feeling such as hardness. It is a thing.

[0007]

The present invention provides an L * value density A
Has a film thickness B (μm) of 0.01 ≦ B ≦ − (3.37 × 10 ⁻⁴ ) on at least one surface of a base fabric having a dyeing part or / and a ground pattern part satisfying 1 ≦ A ≦ 90. A metal layer of A + 4.03 × 10 ^-2 is formed by a vacuum vapor deposition method or a sputtering method, and a refractive index of 1.35 to 35 is formed on the upper surface of the metal layer.
And a method for producing a fiber sheet, which comprises forming an organic three-dimensional crosslinked thin film layer having a thickness of 0.05 to 1 μm by a plasma polymerization method.

The ground fabric having a ground dye and / or a ground pattern as referred to in the present invention means a woven fabric, a knitted fabric, a non-woven fabric, etc. made of synthetic fibers such as polyester and polyamide, which are all dyed with the same color, or partially Different colors, that is, printed ones. The coloring material may be a dye, a pigment or the like.

In the base fabric of the present invention, it is essential that the L * value density A at the ground dyeing portion or / and the ground pattern portion satisfies 1≤A≤90. The L * value is an index representing the metric lightness that is quantified by the method of the L * a * b * color system set by the International Commission on Illumination (CIE), and this L * value is the tristimulus. From the Y value in the values (X, Y, Z), it is calculated by the following mathematical formula 1.

[0010]

[Equation 1]

In the case of the present invention, the L * value becomes smaller as the color density of the base cloth becomes higher. And that L
* The smaller the value, when the metal layer is placed on the base cloth,
The background color becomes easy to see through. On the contrary, as the L * value increases, the background color becomes less transparent. When the L * value density A exceeds 90, the color is perceived only by the human eye as white. Therefore, since the background color does not show through the metal layer, the object of the present invention cannot be achieved. At present, it is difficult to make a dyed fabric having an L * value density A of less than 1 (including deep dyeing). The ground dyeing part or the ground pattern part of the base cloth can be seen through more,
Moreover, in order to look up, the L * value density is 5 ≦ A ≦
It is preferably 50.

In the case of a pattern of the ground dyeing part or the ground pattern part of the base cloth, for example, a print pattern composed of multiple colors, the L * value of the single color is not determined by the measuring method of the L * value, Although the L * value may be measured, the L * value in the present invention includes not only a single color but also an L * value in a state where a plurality of colors are mixed.

Regarding the thread specifications of the base cloth, the fiber cross section may be round or irregular, or may be a composite cross section or a mixed fiber. Further, regarding the form, the hetero-shrink mixed yarn, false twisted yarn, indrow yarn, air jet yarn and the like may be used. The base cloth may be subjected to post-processing such as calendering, coating, laminating, embossing and wrinkling. In particular, when the surface reflectance of the base cloth is less than 20%, it is preferable to carry out calendering in order to increase the surface reflection so that the reflectance is 20% or more because interference coloration is easily exhibited. Further, at least one side in the present invention refers to one side or both sides, but normally only one side used on the front side of the cloth is sufficient.

The metal layer (first layer) effectively reflects visible light incident on and passing through the transparent thin film layer (second layer) on the metal layer at the interface between the first layer and the second layer. It is necessary to be a film, and the surface reflection in the visible light region does not show specific absorption and reflection, and it is preferable that the film is relatively flat, but the background color density (L * value density A) of the base cloth and In relation to, the metal layer thickness B
It has been found that (μm) needs to satisfy 0.01 ≦ B ≦ − (3.37 × 10 ⁻⁴ ) A + 4.03 × 10 ⁻² . That is,
The metal layer thickness B needs to be 0.01 μm or more. When B is less than 0.01 μm, the interference color hardly appears when the organic three-dimensional crosslinked film described later is formed, and only the background color is visible, and the object of the present invention cannot be achieved. The upper limit of B is determined by the L * value density A of the base fabric. B
Is larger than the upper limit, when the organic three-dimensional crosslinked film is formed, the background color is not transparent and only interference colors are obtained, which is the same as the conventional one. When the base cloth is a multicolored print pattern, it has various L * values, and in such a case, B can be determined based on the maximum L * value.

The metal forming this metal layer is T
i, Al, Cr, Fe, Mo, Nb, W, Ni, Co,
Ta, Zr, V, Mn, or a mixture thereof, and the like, in particular, Ti, Cr, Fe, stainless steel, and Hastelloy have less absorption and reflection peculiar to the visible light region, and further show flat reflectance. Is preferred.

As a means for forming the metal layer, the vacuum deposition method and the sputtering method are preferable in consideration of the adhesiveness to the base cloth.

The organic three-dimensional crosslinked film (second layer) formed on the metal layer (first layer) is required to adhere well to the metal layer and be transparent. And the refractive index is 1.35 to 2.
It is required to be within the range of 00. Refractive index is 1.3
If the thickness of the organic thin film is less than 5, the interference color does not appear and the productivity is low unless the thickness is considerably increased. When the refractive index exceeds 2.00, interference color appears in a thin film thickness, but a slight difference in film thickness changes the interference color, so uniform film thickness is required and high-level film thickness control is required. Therefore, stable productivity cannot be obtained. The particularly preferable contact ratio of the organic thin film is in the range of 1.35 to 1.6.

The thickness of the organic three-dimensional crosslinked thin film of the second layer is in the range of 0.05 to 1 μm. If it is less than 0.05 μm, a clear interference color cannot be obtained, and if it exceeds 1 μm, it takes time to form a film, productivity is lowered, and the fiber sheet becomes hard. Due to this, the optimum film thickness is in the range of 0.1 to 0.5 μm.

The method for forming the organic three-dimensional crosslinked thin film of the second layer is as follows.
The thin film forming method by the plasma polymerization method is used from the viewpoint that the film thickness is uniform, that is, there is no color unevenness and a bright interference color is exhibited.

The plasma polymerization is a method of forming a three-dimensionally crosslinked thin film on the surface of an object to be processed by applying a high frequency voltage between electrodes while supplying a polymerizable monomer under vacuum. The organic three-dimensional cross-linked thin film formed by this plasma polymerization method has uniform film thickness, controllability of film thickness,
It is considerably superior to the sputtering method in terms of pinholes. Further, due to the three-dimensional crosslinking, sufficient film strength can be obtained even though it is a thin film.

Fluorine-based compounds and silane-based compounds are preferable as the monomer for forming such a plasma-polymerized film. These compounds may be used alone or as a mixture of two or more kinds. A film having a uniform film thickness can be formed from the compound by a plasma polymerization method, and a film excellent in transparency can be formed. Examples of the fluorine-based compound include C ₂ F ₄ , C ₃ F ₆ and C ₃ F ₆ O.
Etc., and a mixed system of C ₂ F ₄ + H ₂ , C ₃ F ₆ + H _2, etc. may be used.

The silane compound is preferably a vinylsilane compound, and examples thereof include vinyltrimethoxysilane, vinyltriethoxysilane, vinyldimethoxyethoxysilane and the like. A silane-based compound is more preferable in terms of adhesive strength to the first thin metal layer.

[0023]

The present invention will be described in more detail with reference to the following examples. The equipment used in this example is
It is as follows. 1) Spectrometer: Hitachi autograph spectrophotometer; U-3400 type 2) Sputtering equipment: Shibaura Seisakusho Co., Ltd .; CFS-
4ES 3) Interference microscope: manufactured by Nippon Kogaku Co., Ltd.

Example 1 Polyester 50 dr for warp
/ 36f false twisted yarn, weft yarn polyester 50dr / 3
After making a plain woven fabric using 6f strongly twisted yarn (2400T / M), according to a conventional method, after desizing and refining, 180 ° C,
Heat setting was performed for 1 minute. This textile was printed with a floral pattern centered on red and green. L of this print part
* When the value is measured with a spectrometer, a red portion 37 (A = 37 in the present invention rule) and a green portion 27 (A = 27 in the present invention rule)
Met.

[0025] 13.56 MH the above printed fabric
It was set in a sputtering device having a high frequency power supply of z and evacuated to 2 × 10 ⁻³ Pa. SUS-310 was used as a target. After evacuation, the degree of vacuum inside the chamber was adjusted to 3 × 10 ⁻¹ Pa with Ar gas. Then 2
Sputtering was performed for 4 minutes at an output of 00 W to form a metal film of 0.021 μm on the woven fabric including the printed surface.

This woven fabric was taken out from the spa and tuttering device, and next, with the metal film surface as the treated surface, 13.56 MH.
It was set in a glass bell jar type plasma processing apparatus having a high frequency power source of z and evacuated to 2 × 10 ^-2 Torr. Flow vinyltrimethoxysilane monomer (refractive index 1.39) into the tank at a flow rate of 5 cc / min to make the inside of the tank 0.5T.
Controlled to orr. After that, plasma polymerization was performed for 4 minutes at an output of 1 W / cm ² to form a 0.3 μm plasma-polymerized film.

When the treated cloth was taken out and viewed from directly above, the floral patterns of green and red of the above print appeared to float in the interference color of pink. Also, if you look at an angle of 45 °, the flower pattern appears to be more raised and accented compared to normal interference colors (made of white base cloth), which is different from the conventional interference colors only. The fabric had novel characteristics.

Comparative Example 1 The same printed base cloth as in Example 1 was used, and this printed base cloth was subjected to sputtering under the same conditions as in Example 1. However, in the case of this example, the processing time was 1 minute and the film thickness was 0.0058 μm. The woven fabric was further subjected to plasma polymerization treatment using a vinyltrimethoxysilane monomer under the same conditions as in Example 1 to form a 0.32 μm plasma-polymerized film on the woven fabric surface. When the treated cloth was taken out and the cloth was viewed from directly above, almost no interference color was seen, and only the printed pattern appeared dimmer than the original color. It was the same when I changed the angle.

Comparative Example 2 The same printed base cloth as in Example 1 was used, and this printed base cloth was subjected to sputtering under the same conditions as in Example 1. However, in the case of this example, the processing time was 10 minutes and the film thickness was 0.056 μm. The woven fabric was further subjected to plasma polymerization treatment using a vinyltrimethoxysilane monomer under the same conditions as in Example 1 to form a 0.32 μm plasma-polymerized film on the woven fabric surface. When this treated cloth was taken out and viewed from directly above, the pink interference color appeared, but the printed pattern printed on the base cloth was not visible, and the same was true when the angle was changed. , The same as the known light interference coloring sheet.

Claims (1)

[Claims] 1. A film thickness B (μm) of 0.01 ≦ B ≦ on at least one surface of a base fabric having a ground dyeing portion or / and a ground pattern portion having an L * value density A of 1 ≦ A ≦ 90. A metal layer of − (3.37 × 10 ⁻⁴ ) A + 4.03 × 10 ⁻² is formed by a vacuum deposition method or a sputtering method, and a refractive index of 1.35 to 35 is formed on the upper surface of the metal layer.
A method for producing a fiber sheet, which comprises forming an organic three-dimensional crosslinked thin film layer having a thickness of 0.05 to 1 μm by 2.00 and a plasma polymerization method.