JPH10266080A - Production of dyed fabric and dyed fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a dyed fabric having a natural touch, improved in the three-dimensional touch and the raw material touch of the fabric and having a mixed color fabric-like appearance by dyeing a fiber fabric containing disperse dye-dyeable fibers in a dyeing bath containing a specific disperse dye, a water- soluble inorganic salt and porous inorganic particles. SOLUTION: This method for producing a dyed fabric comprises immersing and dyeing a fiber structure containing disperse dye-dyeable fibers, such as a polyester fabric, in an aqueous solution containing a disperse dye technical product having an average particle diameter of 5-500 μm and substantially not containing a dispersing agent, a water-soluble inorganic salt such as sodium sulfate in an amount of 50-500 g/L, and porous inorganic particles, such as porous silica, having an average pore diameter of >=10 Å in an amount of 5-50 g/L at 120-140 deg.C for 10-60 min.

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 dyed fabric having fine color unevenness which enhances the three-dimensional appearance of a material, and gives a sense of quality and naturalness. More specifically, the present invention relates to a method for producing a dyed fabric suitably used in various fields where cloth is generally used, such as outerwear such as blouses and suits in the field of fashion clothing, and curtains and cloths in the inner and interior fields.

[0002]

2. Description of the Related Art Conventionally, natural fibers have been considered to have a natural feeling in dyed articles due to minute differences in dyeing feet at the level of single fibers, unlike synthetic fibers. Further, wool and the like are knitted and woven by mixing more than 10 colors of yarn-dyed cotton, and there are many top-dyeing techniques that seem to be plain but have a color mix effect to enhance the texture of the material.

[0003] In addition, there is also a synthetic fiber which is colored in a color-mix tone in which fine color spots are dispersed for the purpose of natural color unevenness or a new visual effect.

However, in order to impart color unevenness to a synthetic fiber cloth having a uniform dyed foot, it was necessary to take the following method.

[0005] (1) Similar to wool, knitting and weaving are performed by mixing spun yarn in which fibers separately dyed in the cotton stage or yarns separately dyed in the yarn stage are mixed. Method of forming fabric (2) Method of dyeing after mixing and knitting and mixing fibers having different dyeing properties to form a fabric (3) Method of printing a spot pattern by the number of colors by roll printing or screen printing (4) A method of producing particles containing a dye and applying the particles to a fabric to form a color has been used.

However, the method (1) requires preparation from the yarn dyeing stage in order to obtain a fabric having a desired color tone, and requires a very long process. In addition, the color mix that can be produced is a partial color change for each yarn if dyed, so the size of the color range that appears on the fabric surface is limited to the knitting and weaving when one yarn is dyed in a single color. A regular pattern is formed depending on the structure, and even in the case of partial dyeing, regularity tends to occur due to the relationship between the dyed length of the yarn and the pitch of the knitted structure. The smallest spot is also the thread width ×
Limited to the weaving pitch.

[0007] In the case of cotton dyeing, the size of the color range is basically limited to one single fiber, and has a direction depending on the weave structure. Furthermore, cotton dyeing cannot be performed on the mainstream filament fabric made of synthetic fibers. Moreover, these dyeing methods are expensive for synthetic fibers which are originally less expensive than wool, and thus are not practiced.

In the method (2), the dyeing can be performed in a post-processing stage, but the size of the color spot is the same as in the method (1). Further, as for the color tone, since the combinations of the dyes and the materials which can be dyed in different colors are limited, the combinations of colors which can be dyed at most two or three colors or dark and light colors are also limited.

In some cases, the method of printing (3) is used. In this case, it takes time and effort to produce a roll engraving pattern for determining the density and size of spots and a screen mold. If the degree of freedom is low and the number of spots is large, printing must be repeated for the number of spots. Since the size of the obtained spots is limited in the engraving of the screen mesh and the roll, it is not possible to produce a very fine one and lacks a sense of quality. In addition, the distribution of the color spots necessarily has regularity and periodicity, which impairs the fabric quality as a mixed tone.

Regarding the method (4), there are several known examples regarding the method for producing the dye-containing particles.

[0011] The method of applying the dispersion liquid by means of screen printing, coating, dipping or the like after the dye is coarsened can be easily applied by post-processing, and can be carried out in a single treatment with particles of any color. Has the advantage that any multicolor spot dyeing can be easily performed.

However, among these known examples, Japanese Patent Publication No. 55-42194 and Japanese Patent Publication No. 40-2203
No. 2, JP-B-48-22876 discloses a technique in which a coagulated product of a water-soluble polymer or an activator and a dye is once separated by filtration, dried, pulverized, and then sieved. In the case of, a uniform particle size can be obtained arbitrarily and the stability is high, but the process becomes quite complicated and the energy loss for drying the wet mud is large, so a small number of There is a basic problem that it is difficult to take immediate action at the processing plant. It is also possible to prepare dye-containing particles in advance, in which case,
Since the color and the size of the particles are fixed, it is difficult to cope with the fashion field where color demand is high.

It is easy to apply the dye particles by a dip or various coating methods, but the dye does not penetrate into the back side of the fabric, and the difference between the front and back sides becomes large, and coating unevenness easily occurs. There is such a problem. From the viewpoint of cost, the various coating methods are disadvantageous compared to the ordinary solid-color dyeing method including the steps of coloring and washing after application to the fabric.

As a method for imparting unevenness in post-processing without taking any means of coating and printing, JP-A-64-267 discloses
No. 90, impregnate porous particles such as pumice stone with dye, put these particles and fiber product in a chamber, rotate and transfer dye to fabric unevenly, separate the particles, and heat-treat the dye of fabric. A method of fixing is disclosed. In this case, there is an advantage that uneven dyeing can be performed completely by post-processing and without difference between front and back, and any color can be dyed by an arbitrary number of colors.

However, after the particles containing the dye and the fabric are brought into contact with each other in the chamber, they need to be separated and then fixed by heat treatment in the same manner as in a usual printing process, so that the process is complicated. In addition, the size of the unevenness is limited because the particles must be somewhat large because they need to be easily separated from the fiber product.

As described above, conventionally, regularity and periodicity are caused by the weaving structure and screen, or the size of the spots is often limited in other cases. It was difficult to perform the staining simply and in a short time.

Even if various designs are made for high-quality dyed fabrics, the spots are too conspicuous, give an impression as if there is only dust, or the fabric has a special knitting structure. In many cases, the surface feeling is killed to give a rough image, and a natural and elegant spot-dyed fabric is not always obtained. Therefore, it has been difficult to easily design a material that is new and that is satisfactory in terms of quality, such as a high-grade feeling and a natural feeling, in a multicolor spot-dyed fabric conventionally called a color mix tone.

[0018]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a so-called color-mixed fabric having a small area and color unevenness, which has a natural feeling and can improve the three-dimensional appearance and texture of the fabric. An object of the present invention is to provide a dyeing method for imparting color unevenness.

[0019]

Means for Solving the Problems The method for producing a dyed fabric of the present invention has the following constitution to solve the above-mentioned problems.

That is, in dyeing a fiber structure containing disperse dye-dyeable fibers with a disperse dye, the disperse dye is converted into an aqueous solution containing a water-soluble inorganic salt in the form of particles substantially containing no dispersant. A method for producing a dyed fabric, comprising heating and dyeing while being in contact with the fiber structure.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

In the present invention, when a fiber structure containing dye-dispersible dyeable fibers is dyed with a disperse dye, the disperse dye contains a water-soluble inorganic salt in the form of particles substantially containing no dispersant. It is heated and dyed while being brought into contact with the fiber structure in an aqueous solution.

According to the present invention, it is possible to obtain a dyed fabric having a natural color unevenness when dyeing by using the same dyeing machine as used for dyeing into a uniform solid color.

In addition to the natural unevenness, the three-dimensional feeling and texture of the material are not impaired, but rather emphasized, so that it has a characteristic that it can give a texture closer to solid color and a higher quality of mixed tone. Furthermore, since the dyeing apparatus is used, it can be carried out in a processing plant which usually handles plain dyeing, and the post-dyeing processing is highly advantageous in terms of distribution.

However, the dip dyeing method originally aims at uniform solid color dyeing, and simply using a dye having a large particle results in a leveling process similar to ordinary dip dyeing in a heating process for fixing.

A feature of the present invention resides in that a dye containing no dispersant is added to a dyeing solution for dip dyeing, and dyeing is performed in a water-soluble salt solution.

A dyeing method of dyeing using a dye base containing no dispersant is disclosed in JP-A-7-161173.
No. 6,086,045. In this example, the dye is used in a so-called cake state, and is subjected to dip dyeing without a dispersant, thereby eliminating the need for a dispersant and achieving low cost and high dyeing properties. It is stated that a dyed dyed fabric is obtained.

However, when a dye containing no dispersant is used and dyeing is carried out using a water-soluble salt aqueous solution, the dye is not dyed uniformly on the fabric surface, as is the case with conventional dyeing or the uniform solid dyeing obtained by the above-mentioned method. Thus, a color uneven dyed fabric is obtained, which is dyed unevenly.

In the present invention, when the dye contains a dispersant, the dye is solubilized by the dispersant micelles, promotes dissolution, and the dye is leveled by the uniform adsorption of the dispersant to the fiber surface. The solubility of the dye in
As compared with the usual dyeing conditions, there is a problem that the rate at which the dye particles contaminate and dye the fiber surface in a solid state decreases, and color unevenness does not appear.

The addition of the porous fine particles is preferable from the viewpoint that color unevenness dyeing is promoted and a more clear feeling of particle unevenness is exhibited.

The fabric used in the present invention contains fibers which can be dyed with a disperse dye. Among them, those containing polyester, acetate, triacetate and the like are preferable, and those containing polyester are particularly preferable. As the polyester, a modified polyester having improved dyeability such as cationic dyeing can be used.

Unless fibers which can be dyed with a disperse dye are contained, there is a problem that a color unevenness cannot be imparted.

The fiber structure includes a woven fabric, a knitted fabric, a non-woven fabric and the like.

It is also possible to use a blended woven fabric with another material which is not dyed with a disperse dye. In this case, a new quality can be obtained by more complicated dyeing, synergistic with the different color effect of the mixed spinning with the different dyeing material.

In the present invention, the dye in a particle state substantially not containing a dispersant usually includes a dye which is used after finishing as a disperse dye by adding a dispersant and finely dispersing. It is not in a finely dispersed state by the agent. The disperse dye pigment is not particularly limited, and various disperse dye pigments may be used.

For example, a pressed cake of a dye precursor directly obtained by dye synthesis or a dried product thereof can be used as it is. Further, a product which is usually used for dyeing and finished as a disperse dye, may be dispersed and destroyed by mixing with a dispersant and a complex-forming agent, and may be reagglomerated. The point is that dyeing is performed in a system in which a surfactant having a dispersing effect is not substantially contained in an effective state.

If the average particle size of such dye particles is less than 5 μm, color unevenness is less likely to occur and the color tends to be close to ordinary plain dyeing.
When particles exceeding μm are used, color unevenness is unnatural and
Undesirable unevenness such as partial solidification of the dye tends to increase. Preferably the average particle size is 5 to 500 μm
Dye particles, more preferably an average particle size of 30 to
Dye particles having a size of 200 μm are used.

In the present invention, the water-soluble inorganic salt refers to a salt which is generally known as a salt having high solubility in water. Preferably, the salt does not adversely affect the dyeing of the disperse dye. In particular, salts exhibiting neutral to acidic properties are preferred. Such salts include sulfates, hydrochlorides, nitrates and the like, for example, sodium sulfate, sodium chloride, potassium chloride,
Ammonium sulfate, calcium nitrate and the like can be used. These salts may be used alone or as a mixture of two or more.

The amount of the inorganic salt added is preferably 50 g / l or more as a dyeing solution in order to perform sufficient uneven dyeing. Although it depends on the solubility of the inorganic salt to be used, if it is too much, the cost is high, and the workability and environmental problems are affected. Therefore, the addition is preferably in the range of 50 g / l to 500 g / l. More preferably from 100 g / l to 400 g / l
, A more natural color unevenness can be obtained.

As the porous fine particles used in the present invention, there are an inorganic porous material and an organic porous material. As the inorganic porous fine particles, silica, alumina, ceramics, zeolite, pearlite, carbon, shirasu and the like can be used. Further, as the organic porous fine particles, rubber, resin,
Fiber or the like can be used. Among these, inorganic porous fine particles are preferably used as effective in improving the uneven dyeing property of the present invention, and porous silica fine particles are more preferably used from the viewpoint of cost, environmental problems, and the like.
The average pore diameter of the porous fine particles is preferably 10 Å or more from the viewpoint that the effect of uneven dyeing is high.
A range of not more than 00 Å is preferred.

If the addition concentration of the porous fine particles is less than 5 g / l, the effect is weak, and if it exceeds 50 g / l, the cost increases and the bulky porous fine particles must be handled in a large amount, so that the workability is increased. Tend to have an adverse effect. Therefore, it is preferable to add in the range of 5 g / l or more and 50 g / l or less. More preferably, 10 g / l or more and 20 g
/ L or less.

The dyeing condition in the present invention may be a general condition for dyeing a polyester fiber. Usually, the dyeing is started at a temperature of 60 ° C. or less, and then the temperature is raised to a temperature of 120 ° C. or more and 140 ° C. or less. It is preferable to carry out the program by keeping the program for 10 minutes to 60 minutes.

The dyeing apparatus for dyeing is not particularly limited, but a liquid jet dyeing machine, a high-temperature wins dyeing machine, a drum type dyeing machine, a small pot type small dyeing machine, and the like generally used for dyeing are used. be able to.

The dyed fabric may be washed with water and subjected to a washing step such as RC as in ordinary plain dyeing.

Hereinafter, the present invention will be described in more detail with reference to Examples.

[0046]

【Example】

[Example 1, Example 2, Comparative Example 1] As a polyester cloth, a satin woven fabric ("Elastofit" manufactured by Toray Industries, Inc.)
The basis weight was 122 g / m ² ).

The following C.I. An I number dye material (dried cake) was prepared. The average size of the particles is indicated in parentheses. Disperse R-92 (30 microns) 0.1% owf B-79 (55 microns) 0.2% owf O-13 (62 microns) 0.05% owf Example 1 contains the above dye and the following additives: The solution was adjusted so that the bath ratio was 1:20 with respect to 5 g of the cloth,
00 cc of the staining solution was prepared.

Sodium sulfate (decahydrate) 300 g / l (neutral crystal sodium sulfate manufactured by Ishida Chemical Co., Ltd.) Porous silica fine particles 10 g / l (Silycia 445 manufactured by Fuji Silysia Chemical Co., Ltd.) A solution containing only the same dye as in Example 1 and 300 g / l of sodium sulfate (decahydrate) was prepared.

Further, as Comparative Example 1, the following disperse dyes were prepared. These dyes correspond to commercially available products obtained by dispersing the above dye precursors.

Dianix Fast Red B-FS (Dystar Japan KK) 0.3% owf Miketon Polyester Navy Blue GLSF (Mitsui Toatsu Dye Co., Ltd.) 0.6% owf Dianix Orange B-SE (Dystar Japan KK) 0.15% owf These dyes were added to water to prepare a dyeing solution of Comparative Example 1.

Example 1, Example 2, and Comparative Example 1
Was set in a small dyeing machine together with the fabric, heated to 130 ° C. at a rate of 1 ° C./min, dyed for 30 minutes, washed with water, and washed with RC.

The fabric after dyeing in Examples 1 and 2 was slightly bluish gray and seemingly plain-colored, but when viewed closely, random fine fine shading was dispersed at a distance of 1 mm or less. Was. In this fabric, the glare unique to satin is slightly suppressed, and it becomes a soft color,
It was very high quality.

The degree of color unevenness was clearer in Example 1 than in Example 2.

On the other hand, the fabric of Comparative Example 1 was dyed in a completely uniform and plain color, and no natural color unevenness as in the example was observed.

Example 3, Comparative Example 2 As a dyeing fabric, a polyester venetian fabric ("Lieberg P", weight: 120 g / m ^2, manufactured by Toray Industries, Inc.) was prepared.

The following C.I. An I number dye precursor was prepared.

Disperse R-92 0.2% owf B-354 (average particle size 60 microns) 0.2% owf O-13 0.05% owf A solution containing the following additives as a dyeing solution was applied to the fabric. The bath ratio was prepared to be 1:20.

Sodium chloride 200 g / l (neutral crystalline sodium sulfate, manufactured by Ishida Chemical Industry Co., Ltd.) Porous silica fine particles 10 g / l (Sylysia 740 manufactured by Fuji Silysia Chemical Ltd.) In Comparative Example 2, the same dye as in Example 3 was used. Using the drug substance, a solution containing only 10 g / l of porous silica fine particles without an inorganic salt as an additive was prepared as a staining solution.

Using each of the staining solutions of Example 3 and Comparative Example 2, staining was carried out by a small jet dyeing machine. The cloth after dyeing was subjected to ordinary RC washing as in Example 1.

When the fabric of Example 3 was observed, it was found that the surface of the fabric was more deeply dyed, slightly bluish, and random color spots were scattered. As a whole, the fabric had a new appearance of an iridescent tone. On the other hand, Comparative Example 2
Although the same dye precursor was used, there was almost no color unevenness, and a characteristic dyed fabric as in Example 3 was not obtained.

[0061]

According to the present invention, there is provided a novel and high-quality material which has a sense of quality and naturalness, has a fine color unevenness, and enhances the three-dimensional effect of the material, which is preferably used particularly in the field of fashion. A high-quality color-mix-dyed fabric can be obtained using a dyeing machine usually used for plain dyeing.

Claims (7)

[Claims] 1. An aqueous solution containing a water-soluble inorganic salt in the form of particles substantially free of a dispersant when dyeing a fiber structure containing disperse dye-dyable fibers with a disperse dye. A method for producing a dyed fabric, comprising heating and dyeing while contacting the fiber structure in the fabric. 2. An aqueous solution of a water-soluble inorganic salt having a concentration of 50 to 500.
The method for producing a dyed fabric according to claim 1, wherein the weight is g / l. 3. The method according to claim 1, wherein the disperse dye has an average particle size of 5 to 500 μm. 4. The method according to claim 1, wherein porous inorganic fine particles having a large number of pores are added to the aqueous solution.
3. The method for producing a dyed fabric according to item 1. 5. The method for producing a dyed fabric according to claim 4, wherein the average pore diameter of the porous inorganic fine particles is 10 Å or more. 6. The method according to claim 4, wherein the concentration of the porous inorganic fine particles added to the aqueous solution is 5 to 50 g / l.
Or the method for producing a dyed fabric according to 5. 7. A dyed fabric obtained by the method for producing a dyed fabric according to any one of claims 1 to 6.