JPS60104585A - Special dyeing method by photochemical reaction - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a special dyeing method that incorporates a photochemical reaction in dyeing with a naphthol dye. In particular, the present invention relates to a method of dyeing the front and back sides of a fabric in a unique color.

[Prior Art 1] Conventionally, in dyeing fabrics, dip dyeing has focused on level dyeing, with the exception of some cases, so dyeing the front and back sides of fabrics in different colors has hardly been common. On the other hand, unique color dyeing of fabrics by combining dyeing and printing has now been put into practical use.
Although the product is on the market, it has the disadvantage that a large amount of energy is required for dyeing and printing, and the mold cost for printing the poem is expensive. In addition, in recent years, fashion has tended to make clothing lighter weight and diversify its designs, but there is a limit to the ability to dye different colors on both sides of fabric depending on the thickness of the fabric, and in the case of thin fabrics, the dye can be applied to both the front and back. Because it is easy to penetrate, there are many unresolved technical points, and it cannot be said that it fully satisfies the demands of modern fans.

The present inventor has discovered that when a color developer, which is a base component, is first adsorbed in naphile dyeing, and then the color is developed with a primer, when this color developer is irradiated with visible light or ultraviolet rays, The point where the color developer causes a chemical change and the coupling reaction of the preservative is suppressed, and the light energy is applied to the soluble vat dye.
Specifically, we focused on the fact that soluble vat dyes dye fabrics, and as a result of extensive research, we completed the present invention.

[Objective of the invention] The present invention is capable of dyeing different colors on the front and back sides of fabrics with less energy and at a low cost, and also enables dyeing different colors on both sides of thin fabrics, gradation, and color expression of photographic patterns, which are demands of recent fashion. The purpose of this study is to provide a special staining method using a photochemical reaction that enables

[Structure of the Invention] The first feature of the present invention is that after a naphthol dye developer is adsorbed onto a fabric, one side or a part of the fabric is irradiated with DT visual rays or ultraviolet rays to develop the color of the irradiated area. The agent is chemically changed, and the naphthol dye is adsorbed on these four pieces, and a coupling reaction occurs in the unirradiated area to develop the naphthol dye, and the unirradiated area and the irradiated area are colored in the same color. It is a dyeing method that creates shading.

Further, the feature of the second invention of the present application is that, similarly to the first invention, a naphthol dye developer is adsorbed onto a fabric, and after being irradiated with visible light or ultraviolet rays, a naphthol dye undercoating agent and a soluble vat dye are applied to the fabric. After the naphthol dye is adsorbed and a coupling reaction occurs in the unirradiated area to develop the naphthol dye, visible light or ultraviolet rays are irradiated to the irradiated area of the fabric again to develop the soluble vat dye. This method involves dyeing the irradiated areas and irradiated areas with different hues using a naphthol dye and a soluble vat dye.

Furthermore, the feature of the third invention of the present application is that after adsorbing a color developer for naphyl dye and a soluble para-dye to a fabric, one side or a part of this fabric is irradiated with visible light or ultraviolet rays to form a soluble batt. The dye is allowed to develop color, and a naphthol dye base agent is adsorbed onto this fabric, and a coupling reaction occurs in the unirradiated area to develop the naphthol dye. There is a dyeing method that produces different hues depending on the color.

The dyeing method of the present invention is a naphthol dyeing method in which a color developer, which is a base component, is first adsorbed, and then the color is developed with a base dye. This method suppresses the coupling reaction of the primer on one side or a portion of the fabric by chemically changing the color developer in the irradiated area by irradiating it with irradiation, thereby creating a color difference in density from the unirradiated area. In addition, by adding to this method the dyeing phenomenon of soluble vat dyes on fabrics due to light energy,
This is a method that produces a more effective hue difference.

Composition fibers for fabrics that are compatible with the dyeing method of the present invention include not only cellulose-based m fibers suitable for naphthol dyes, but also synthetic fibers such as acetate, vinylon, nylon, and polyester, or composite fibers thereof, whose structure is similar to that of textiles. It can be either ground or woven fabric.

The steps will be explained below in order.

Adsorption of Color Developer> Examples of color developers for naphthol dyes include aromatic amines or derivatives thereof. This color developer is diazotized by a well-known method to produce a color developer. Further, a color developer may be prepared by further mixing a soluble vat dye with this color developer.

The color developing solution thus prepared is impregnated into the fabric to be dyed and adsorbed. This impregnation method may be any of the soaking method, choreography method, jigga method, or Pat 7 method.

Irradiation of visible light or ultraviolet rays> The irradiated light is visible light with a wavelength range of 400 to 800 nm or ultraviolet rays of 300 to 400 nm, which chemically changes the color developer and suppresses the coupling reaction of the primer. It is also preferable for coloring the soluble dye 1, and its wavelength is selected depending on the type of fabric and dye, desired hue, and density.

The fabric to be irradiated may be in a wet state as it is impregnated with the color developer described in -I-, or may be in a dry state after being impregnated.

In the case of pattern dyeing to make a part of the fabric a different color, a light shielding sheet on which a desired pattern is formed in advance is brought into contact with -L of the spread fabric, and light is irradiated. This shielding sheet is suitably a patterned punching die, a patterned photographic negative film, or the like. Other pattern dyeing methods may utilize the principle of tie-dyeing to partially block the light rays by tying or stringing the fabric.

Further, in the case of plain dyeing in which one side of the fabric is colored differently from the other side, a light shielding sheet is not required. At this time, unless the entire surface of the fabric is intentionally illuminated with light evenly, gradation and uneven dyeing can be achieved.

The irradiation time of the light beam depends on the wavelength or illuminance of the light beam, the type of fabric,
It is determined by the desired hue and density, and is usually selected from a range of several seconds to several tens of minutes.

When irradiated with the light, the color developer undergoes a chemical change in the irradiated portion, reducing the coupling reaction function of the primer.

In addition, when a soluble vat dye is mixed in the color developer, the coupling reaction function of the undercoating agent described in -4- decreases, while the chromophore of the soluble vat dye is excited by the saponification reaction, and then 41 pieces of paper are colored in a hue different from that of the naphthol dye developed by the preparative described above. Therefore, in the case of plain dyeing, the front side can be colored red and the back side blue, for example.

Adsorption of precipitants> Examples of naphtholic dye precipitates include the well-known 3-hydroxy-2-naphthoic acid and other aromatic 0-oxycarboxylic acid allylamides. This is made into a water-soluble submerging solution such as sodium salt of thorium hydroxide by a heating dissolution method or a low temperature dissolution method. In addition, when a soluble vat dye is not mixed in the color developing solution, a soluble vat dye may be further mixed with this dipping solution to form a subdipping solution.

The 4J fabric irradiated with the light beam is passed through the thus prepared under-soaking solution by any of the dipping method, shaking method, or pass-and-doing method, and the color developer is applied to the under-soaking solution. The coupling reaction of the priming agent produces a water-insoluble azo dye within the fibers of the fabric and develops the color. At this time, the coupling reaction is suppressed in the area irradiated with the above light beam, and the normal coupling reaction occurs in the unirradiated area, so that the unirradiated area is dark colored and the irradiated area is the same color and light colored fabric. I can do it.

In addition, when a soluble vat dye is mixed in the subsoaking solution, after the above-mentioned coupling reaction is carried out to completely develop the naphthol dye, the fabric is uniformly squeezed and the above-mentioned visible light or ultraviolet rays are applied to the fabric again. irradiate the same part of the As a result of this irradiation, the soluble vat dye develops color in the same manner as described above, and a fabric in which the naphthol dye and the soluble rose I dye are combined can have completely different hues on the front and back sides.

[Effects of the Invention] As described above, according to the present invention, by controlling the coupling reaction of naphl dye with light energy, thin fabrics such as muslin and lawn, gauze, Even for fabrics with large spaces such as lace, by changing the dyeing degree of the naphthol dye in the irradiated area, it is possible to create different colors on the front and back by changing the shading of the same color, and by irradiating the desired pattern area, it is possible to dye the pattern. Also, by making it one-sided, it is possible to optionally dye the front and both sides with a different color.

In addition, by adding a soluble vat dye to the naphthol dye developer or subbing agent, and making the light energy contribute to the color development of the soluble vat dye while suppressing the coupling reaction of the subbing agent, the same color can be obtained by the method described in 2. It is possible to dye not only the light and shade of the system, but also different hues using O2 by combining naphthol dyes and soluble vat dyes, making it possible to obtain a wide variety of fabrics and create textile materials suitable for recent fashion trends. .

In addition, pattern dyeing using the dyeing method of the present invention is performed using light energy, rather than the conventional combination of dip dyeing and textile printing, so large amounts of water and heat energy are not required during dyeing, and the dyeing method of the present invention For pattern dyeing, not only conventional printing molds but also pattern photographic film can be used, so the cost of patterning can be significantly reduced.

Furthermore, plain dyeing by the dyeing method of the present invention has the excellent effect of making it possible to express colors rich in variation such as gradation and uneven dyeing by controlling the irradiation conditions of light energy.

[Examples] Next, in order to clarify specific aspects of the present invention, the present invention will be explained using Examples. It is not limited.

<Example 1> Red Ba5e Kl (manufactured by Daito Kagaku Co., Ltd.), a color developer for naphthol dye, is dissolved in a known method to obtain a color developer for a diazo compound, and a cotton fabric is passed through the developer to develop the color. After being impregnated with the agent, it was squeezed uniformly, and immediately one side of the cotton fabric was irradiated with ultraviolet light with a wavelength of 380 nm for 3 minutes. On the other hand, Naphthoid AS (manufactured by Sumima Kagaku Co., Ltd.) is converted into a sodium salt by using caustic soda in a known manner, and the cotton fabric is immersed in a solution of this sodium salt at 70°C for 20 to 30 minutes and left to stand. When the cotton fabric was cooled and submerged, an insoluble azo dye was produced within the fibers of the cotton fabric due to a coupling reaction, resulting in color development. After that, I boiled it for 30 minutes in boiling water with carbonated soda and soaped it.
When finished by further washing with water, a unique cotton fabric was obtained on both sides, with one side irradiated with ultraviolet rays being pale pink and the other side not irradiated with ultraviolet rays bright red.

<Example 2> A developer solution was prepared using the same developer as in Example 1, and a cotton knitted fabric was passed through the developer solution to be impregnated with the developer.
Ultraviolet rays were irradiated under the same conditions as in Example 1. On the other hand, a soluble vat dye Ye
A dye liquor is prepared by mixing LOW V (manufactured by Hoechst), the irradiated cotton knitted fabric is passed through this dye liquor, the naphthol dye is colored by a coupling reaction, and then the cotton knitted fabric is dyed. The same surface that was irradiated with ultraviolet rays was irradiated with ultraviolet rays again for 3 minutes, and then the same surface as in Example 1 was soaped and washed with water.
The surface irradiated with ultraviolet rays was colored yellow by the soluble vat dye, and the surface not irradiated with ultraviolet rays and colored by the naphthol dye was red, giving a uniquely colored cotton knitted fabric on both sides.

<Example 3> Naphthol dye developer 5carlet Ba5e
RC (manufactured by Daito Kagaku Co., Ltd.) is dissolved in a known manner to obtain a color developer of a diazo compound, and a soluble vat dye Blue IBG (manufactured by Hoechst) is further mixed in the color developer.
A cotton lace fabric was impregnated with the dye solution, and after being squeezed uniformly, it was immediately irradiated with ultraviolet rays under the same conditions as in Example 1. Thereafter, the irradiated cotton lace fabric was passed through a primer solution in which the same primer as in Example 1 was dissolved, and the cotton lace fabric was colored by a coupling reaction. When similarly soaped and washed with water, a uniquely colored cotton lace fabric was obtained on the front and back, with the surface irradiated with UV rays colored blue by the soluble vat dye, and the surface not irradiated with UV rays colored red due to the naphthol dye.

Applicant Tsuneo Iwasaki Agent: Hajime Kawakami (2 others) 4

Claims (3)

[Claims] (1) An adsorption step in which a naphthol dye developer is adsorbed onto the fabric, an irradiation step in which visible light or ultraviolet rays are irradiated to one side or a portion of the fabric that has adsorbed this color developer, and the visible light or ultraviolet rays are irradiated. A special dyeing method using a photochemical reaction, which includes a color development process in which naphthol dye is adsorbed on the fabric to develop the naphthol dye. (2) An adsorption step in which a naphthol dye developer is adsorbed onto the fabric, an irradiation step in which visible light or ultraviolet rays are irradiated to one side or a portion of the fabric that has adsorbed this color developer, and the visible light or ultraviolet rays are irradiated. A color developing step of adsorbing a naphthol dye base agent and a soluble vat dye onto the fabric to develop the naphthol dye, and irradiating the irradiated area of the fabric where the naphthol dye has developed with visible light or ultraviolet rays again. A special dyeing method using a photochemical reaction, which includes a coloring step of coloring the vat dye. (3) An adsorption step in which a naphthol dye developer and a soluble vat dye are adsorbed onto the fabric, and one side or a portion of the fabric that has adsorbed the developer and the soluble vat dye is irradiated with visible light or ultraviolet rays to form the soluble vat dye. A special dyeing method using a photochemical reaction, which includes an irradiation step to develop a color, and a color development step to develop a naphthol dye by adsorbing a naphthol dye sublayer to the fabric irradiated with visible light or ultraviolet rays.