JPH10204784A - Dyed fiber and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain dyed fiber that is excellent in washing fastness and sun light fastness and useful as sheets for hospitals by dyeing the fibers coated with colloidal metal compound on their surfaces with a dye having a metal- chelating structure. SOLUTION: The fiber coated with colloidal metal compound [for example, CuCl2 .3Cu(OH)2 ] is dyed with a dye having a metal-chelating structure. This dyeing process can be applied to any fiber even at ambient temperature under normal pressure independently from the dyeing conditions intrinsic to the properties of individual fibers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can dye various kinds of fibers with a dye having a structure coordinating to a metal under normal dyeing conditions, and is excellent in washing fastness and sunlight fastness. The present invention relates to a fiber and a method for producing the fiber.

[0002]

2. Description of the Related Art For example, hospital sheets and the like are required to withstand washing and sun disinfection performed for the purpose of sterilization, and dyeing having high washing fastness and sunlight fastness is required. In order to respond to such demands, a dye intermediate and a metal compound form a complex, such as a metal complex dye or an acid mordant dye, thereby increasing the bonding strength and improving the washing fastness, or improving the sunlight fastness. Improve. Synthetic dyes are classified into nonionic (nonionic), cationic (ionic), and anionic (ionic) according to the type of ion, and these are used according to the suitability of each fiber material.

[0003]

However, these methods for improving the washing fastness and the fastness to sunlight are based on the suitability of binding dyes and fibers to protein fibers such as wool and silk and synthetic fibers such as nylon and polyurethane. In addition to being limited,
Since these bonds are due to the bond between the fiber and the dye intermediate, the types of synthetic dyes have been limited. Furthermore, some fiber materials are difficult to dye. For example, polypropylene is partially dyed with a disperse dye by an autoclave, and polyester is mostly dyed with a disperse dye. In addition, these polyolefins such as polypropylene and polyester can be dyed only with nonionic dyes, but not with acid dyes and direct dyes.

The present invention has been made in view of the above circumstances, and dyes a fiber whose surface is coated with a colloidal metal compound with various dyes having a structure coordinating with metal to obtain a unique fiber. An object of the present invention is to provide a dyed fiber which can be applied to any type of fiber at ordinary temperature and normal pressure without being affected by the dyeing conditions due to its suitability, and has excellent washing fastness and sunlight fastness, and a method for producing the same.

[0005]

According to a first aspect of the present invention, there is provided a dyed fiber, wherein a fiber whose surface is coated with a colloidal metal compound is dyed with a dye having a structure which coordinates a metal. . The dyed fiber according to claim 2,
It is characterized in that the colloidal metal compound is a metal compound present in one or more of a metal oxide, a metal hydroxide and a metal oxyhydroxide. The dyed fiber according to claim 3 is characterized in that the colloidal metal compound is a copper compound. The dyed fiber according to claim 4, wherein the colloidal metal compound is a compound of Zn, Sn, Al, and Ti. The dyed fiber according to claim 5, wherein the colloidal metal compound is a compound of Cr and Ni. The dyed fiber according to claim 6 is characterized in that the fiber is polyolefin and / or polyester. The dyed fiber according to claim 7 is characterized in that the dye is an anionic dye.

[0008] According to a eighth aspect of the present invention, there is provided a method for producing a dyed fiber, comprising dyeing a fiber having a predetermined concentration of a colloidal metal compound in a floating state which is fixed in advance with a dye having a structure coordinating with a metal. Features. According to a ninth aspect of the present invention, in the method for producing a dyed fiber, the solution concentration of the suspended colloidal metal compound is 50 g / l or less.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A dyed fiber according to the present invention is produced by the following procedure. First, a desired metal salt is dissolved in a predetermined solvent to prepare a metal compound solution having a predetermined concentration. Next,
After completely dissolving the metal salt in this solution, a colloidal metal compound is produced by adding energy such as heating and adjusting the pH. Then, the above-mentioned colloidal metal compound is brought into contact with and fixed to the fiber material, thereby covering the surface of the fiber material. The dyed fiber of the present invention is produced by dyeing the thus-coated fiber coated with the colloidal metal compound under ordinary dye handling conditions.

[0008] As the metal salt, those which generate colloidal particles by the above-described procedure and generate colloidal metal oxides, metal hydroxides and metal oxyhydroxides are suitable. Incidentally, preferably selected from silver, copper, zinc, tin, lead, iron, cobalt, nickel, manganese, aluminum, titanium, and chromium.
It is advisable to use more than two kinds of metals. Above all, CuCl
₂ , salts of copper compounds such as CuSO ₄ and Cu (NO ₃ ) ₂ can be dissolved, heated and adjusted in pH to obtain CuCl ₂ .3C
u (OH) ₂ , CuSO ₄ .3Cu (OH) ₂ , Cu
A colloidal metal hydroxide such as (NO ₃ ) ₂ .3Cu (OH) ₂ is generated and adheres well to the fiber. Furthermore, chlorine, sulfate, and nitrate groups, which are found in the above-mentioned copper compounds, have strong reactivity and are suitable for binding a dye and a dye intermediate to form a color. Other easily colored metals include easily coordinated Cr and Ni. Further, those having a white color, such as metal compounds such as Zn, Sn, Al, and Ti, are preferable because they have little effect when the dye develops color.

As counter ions of the above metal salts, relatively inexpensive ones such as chloride ion, sulfate ion and nitrate ion are usually used, but halogen such as bromine, sulfite ion, nitrite ion, phosphate ion, and phosphite ion are used. , Inorganic ions such as hypophosphite ions or ethoxy groups, methoxy groups,
Organic ions such as a butoxy group, oxalate ion, tartrate ion and citrate ion may be used.

Water is the most practical solvent for dissolving the metal salt, but methyl alcohol, ethyl alcohol or other organic solvents may be used. Further, a suitable acid or base may be added to these solvents, or the resulting mixture may be further heated to dissolve the metal salt. The acid may be a mineral acid such as hydrochloric acid or sulfuric acid, or an organic acid such as acetic acid or formic acid, and the base may be sodium hydroxide, potassium hydroxide, ammonia or the like. For example, when the metal salt is originally a metal oxide or metal hydroxide, or when the counter ion of the metal salt is an organic substance such as oxalate ion, tartrate ion, or citrate ion, or contains them, When an appropriate acid is added and heated, it can be completely dissolved. When the counter ion is an ethoxy group, a methoxy group, a butoxy group or the like, it may be dissolved in a suitable organic solvent such as methyl alcohol or ethyl alcohol. Even if TiCl ₄ is only dissolved in water, a part of it is hydrolyzed. If this is further dissolved in an appropriate acid and hydrolyzed, a colloidal metal compound is formed. Sn chloride is dissolved in a previously alkaliified solvent and hydrolyzed, for example, Na ₂ SnO 2
Once precipitated as _3, etc., the extracted product is dissolved, and an acid is added thereto to adjust the pH to an appropriate value to produce a colloidal metal compound.

The concentration of the metal compound in the solution can be arbitrarily selected, and the metal compound can be fixed even at a concentration of 100 g / l or more. However, as the concentration decreases, the precipitated colloidal particles become smaller. With
The specific surface area of the metal compound is increased, and good dyeing can be performed at 50 g / l or less, and optimum dyeing can be performed at a concentration of around 10 g / l.

[0012] Colloidal particles produced by hydrolysis tend to agglomerate when the temperature is low. Therefore, depending on the type of metal, colloidal particles are not produced without heating, and some precipitate out unless heated. For this reason, it is better to heat it to 30 ° C. or higher, but it is preferable to heat it to 50 to 80 ° C.

The pH is adjusted by adding energy such as heating after the metal salt is completely dissolved in the solvent, stirring sufficiently, and slowly adding an acid or alkali. Since the appropriate pH varies depending on the metal species, metal compound concentration, counter ion, solution temperature, and stirring conditions, if these are not suitable, the colloidal metal compound may not precipitate,
Even if the colloidal particles precipitate as primary particles, the particles may aggregate with time and the secondary particles may precipitate. Therefore, in order to precipitate a desired colloidal metal compound, it is necessary to sufficiently confirm the range of each of these suitable conditions in advance.

Copper compounds CuCl ₂ .2H ₂ O, C
In the case of a metal salt such as uSO ₄ .5H ₂ O and Cu (NO ₃ ) ₂ .3H ₂ O, sodium hydroxide, hydroxide and the like are sufficiently stirred at 10 g / l and 30 ° C. or more. A base such as potassium or ammonia is slowly dropped, and p
When the pH is adjusted so that H <4.5, a colloidal precipitate is obtained. In this case, colloidal particles are more easily precipitated when ammonia is used as the base. However, if the stirring is still insufficient or the pH is> 6.0, precipitation occurs.

As an example, AgNO ₃ which is a silver compound as a metal salt is sufficiently stirred at a concentration of 10 g / l and adjusted to pH> 8 with aqueous ammonia, and then sodium hydroxide,
When pH is adjusted by slowly dropping a base such as potassium hydroxide, a colloidal precipitate is obtained. But,
Even in this case, the colloid particles do not precipitate unless ammonia water is added. In the case of AgCl, even a silver compound hardly dissolves.

The deposition of the colloidal metal compound has been described above. The colloidal metal compound is fixed to the fiber material by bringing the fiber material into contact with the solution of the colloidal metal compound thus generated. In this case, the composition and particle size of the colloid particles can be adjusted by controlling the solution concentration, temperature, and pH conditions in the condition region where the colloid particles precipitate. Furthermore, by controlling the reaction temperature and the ratio of the amount of the liquid to the fiber material in addition to these conditions, the amount of the colloid particles fixed can be controlled. In addition, the metal compound referred to here may include a metal oxide, a metal hydroxide, and a metal oxyhydroxide in a part of the chemical structure, such as CuCl ₂ .3Cu (OH) ₂ .

The method of bringing the fiber material into contact with a solution of the colloidal metal compound is performed by immersing the fiber material in the solution, stirring while dipping, or pouring the solution into a container containing the fiber material in advance. And infiltration into the fiber material, or winding while continuously immersing the fiber material. It is desirable that these colloid particles and the fiber material are uniformly contacted by any of the above methods.

Means for applying energy include heat transfer, convection, radiation, ultraviolet rays, infrared rays, electromagnetic waves, X-rays, and the like.
Line irradiation or the like is used as appropriate. It is to be noted that the addition of the energy is continued until the colloid particles are deposited even after the colloid particles are deposited, so that the colloid particles having a small particle diameter are present in a stable state, so that they are fixed well.

The fiber material may be either synthetic fiber or natural fiber. As the synthetic fiber, polyethylene, polypropylene, polyester, polyamide, acryl, vinylon, polyurethane, acetate, rayon, etc. are applied. It is not affected by the differences. In polypropylene, propylene homopolymer, propylene-ethylene copolymer, propylene-
A propylene copolymer such as a butene-1 copolymer, and further, a block copolymer or a random copolymer thereof are applied. As polyethylene, high density polyethylene, low density polyethylene, and linear low density polyethylene are applied. For polyester, polyethylene terephthalate, polybutylene terephthalate, polymethylene terephthalate, poly-para-ethyleneoxybenzoate, and the like are applied. Among polyamides, homopolymers such as polyamide 6, polyamide 66, polyamide 610, and polyamide 12, and polyamide 6/66 and polyamide 6 /
12, a copolymer such as polyamide 6/66/610 is applied. Among them, a homopolymer of polyamide 6 is excellent in moldability and cost. In addition, acrylic, vinylon, polyurethane, aramid, polystyrene, polyvinylidene chloride, and the like may be used, and one or more of these may be used, or two or more of these may be blended in the manufacturing process.

The dye preferably has at least one structure coordinated to a metal such as a direct dye, an acid dye, and an acid mordant dye. Examples of the structure coordinated to the metal include a structure having a hydroxyl group, a carboxyl group, an amino group, or the like at an appropriate position in a dye molecule. Having two hydroxyl groups at one position or one hydroxyl group and one carboxyl group, one having one hydroxyl group and one carbonyl group at the peri position, hydroxyl at the ortho or peri position of the azo group A azo dye having a hydroxyl group or a carboxyl group or an amino group ortho to the azo group of the other nucleus; Having an azo compound.

Dyeing is carried out under ordinary conditions which are appropriate according to the type of dye and the type of fiber.
~ 50: 1, the amount of dye used is 0.5-1% o.
wf, 2-3% for medium dyeing owf, 4-6% for dark dyeing o.
wf. The dyeing temperature is selected depending on the type of the dye and the like, but is generally preferably from 80 to 100 ° C. For example, when dyeing a polyamide fiber with an acid dye, the amount of the dye used is appropriately selected within the above range, the bath ratio is set to 20 to 40: 1, the temperature of the dye bath is raised to 40 ° C., and the fiber is gradually added. And boil for 30 minutes.
Ammonium acetate was added to adjust the pH to 6-7,
The dyeing is continued for another 45 minutes, and when the dyeing is completed, it is washed with water. The dyeing machine may be a commonly used one such as a wins dyeing machine or a jet dyeing machine.

[0022]

EXAMPLES Examples 1 to 11 in which the colloidal metal compound is fixed to the fiber material, Comparative Examples 1 to 5 and examples in the dyeing step will be specifically described in order.

Example 1 An aqueous solution of CuCl ₂ .2H ₂ O having a concentration of 10 g / l
0 ml was prepared, heated to 70 ° C., and adjusted to pH 3.4 with ammonia using colloidal CuCl ₂ · 3Cu.
The polyester woven fabric was kept immersed in the reaction solution of (OH) ₂ for 10 minutes. Thereafter, the woven fabric was taken out, sufficiently washed with water, and dried at 105 ° C. for 1 hour. As a result, it was confirmed by X-ray diffraction that CuCl ₂ .3Cu (OH) ₂ of the copper compound was fixed.
It was confirmed that 5 nm needle crystals were fixed to the fiber material.

Example 2 An aqueous solution of CuCl ₂ .2H ₂ O having a concentration of 10 g / l
0 ml was prepared, heated to 70 ° C., and adjusted to pH 3.4 with ammonia using colloidal CuCl ₂ · 3Cu.
The polypropylene nonwoven fabric was held in the reaction solution of (OH) ₂ for 10 minutes while being immersed. Thereafter, the woven fabric was taken out, sufficiently washed with water, and dried at 105 ° C. for 1 hour. as a result,
X-ray diffraction confirmed that CuCl ₂ · 3Cu (OH) ₂ of the copper compound was fixed, and further, observation with an electron microscope confirmed that needle crystals of about 15 nm were fixed to the fiber material. .

Example 3 An aqueous solution of CuCl ₂ .2H ₂ O having a concentration of 10 g / l
0 ml was prepared, heated to 70 ° C., and adjusted to pH 3.4 with ammonia using colloidal CuCl ₂ · 3Cu.
Acrylic cotton was kept immersed in the reaction solution of (OH) ₂ for 10 minutes. Thereafter, the cotton was taken out, thoroughly washed with water, and dried at 105 ° C. for 1 hour. As a result, it was confirmed by X-ray diffraction that CuCl ₂ .3Cu (OH) ₂ of the copper compound was fixed, and further, by observation with an electron microscope, about 15 nm.
It was confirmed that the needle-like crystals of the above were fixed to the fiber material.

Example 4 An aqueous solution of CuCl ₂ .2H ₂ O having a concentration of 10 g / l
0 ml was prepared, heated to 70 ° C., and adjusted to pH 3.4 with ammonia using colloidal CuCl ₂ · 3Cu.
The nylon tow having a single yarn of 2 denier was immersed in the reaction solution of (OH) ₂ for 10 minutes. Thereafter, the tow was taken out, sufficiently washed with water, and dried at 105 ° C. for 1 hour. As a result, the copper compound CuCl ₂ .3Cu (O
H) ₂ was confirmed to be fixed, and further, observation with an electron microscope confirmed that needle-like crystals of about 15 nm were fixed to the fiber material.

Example 5 An aqueous solution of CuCl ₂ .2H ₂ O having a concentration of 10 g / l
0 ml was prepared, heated to 70 ° C., and adjusted to pH 3.4 with ammonia using colloidal CuCl ₂ · 3Cu.
The vinylon woven fabric was kept immersed in the reaction solution of (OH) ₂ for 10 minutes. Thereafter, the woven fabric was taken out, sufficiently washed with water, and dried at 105 ° C. for 1 hour. As a result, it was confirmed by X-ray diffraction that CuCl ₂ .3Cu (OH) ₂ of the copper compound was fixed, and further, about 15 n
It was confirmed that m needle crystals were fixed to the fiber material.

Example 6 Using a TiCl ₄ solution previously diluted with concentrated hydrochloric acid, a concentration of 10 was used.
A 500 ml g / l TiCl ₄ aqueous solution was prepared, heated to 70 ° C., and kept for 10 minutes while the polyester woven fabric was immersed in a reaction solution of colloidal TiO ₂ adjusted to pH 0.5 with NaOH. did. Thereafter, the woven fabric was taken out, sufficiently washed with water, and dried at 105 ° C. for 1 hour. As a result, it was confirmed by X-ray diffraction that TiO ₂ was fixed,
Further, it was confirmed by observation with an electron microscope that needle-like crystals of about 5 nm were fixed to the fiber material.

Example 7 Using a TiCl ₄ solution previously diluted with concentrated hydrochloric acid, a concentration of 10 was used.
A 500 ml g / l TiCl ₄ aqueous solution was prepared, heated to 70 ° C., and held for 10 minutes while the polypropylene nonwoven fabric was immersed in a reaction solution of colloidal TiO ₂ adjusted to pH 0.5 with NaOH. . Thereafter, the nonwoven fabric was taken out, washed sufficiently with water, and dried at 105 ° C. for 1 hour. As a result, it was confirmed by X-ray diffraction that TiO ₂ was fixed, and further, observation by an electron microscope confirmed that needle crystals of about 5 nm were fixed to the fiber material.

Example 8 An aqueous solution of AlCl ₃ .6H ₂ O having a concentration of 10 g / l
0 ml was prepared and heated to 70 ° C.
The polyester woven fabric was kept immersed in the reaction solution of colloidal aluminum hydroxide adjusted to H5.3 for 10 minutes. Then take out the woven fabric and wash it thoroughly with water,
Dry at 5 ° C. for 1 hour. As a result, it was confirmed by observation with an electron microscope that needle crystals of about 7 nm were fixed to the fiber material.

Example 9 An aqueous solution of AlCl ₃ .6H ₂ O having a concentration of 10 g / l
0 ml was prepared and heated to 70 ° C.
The polypropylene non-woven fabric was immersed in a reaction solution of colloidal aluminum hydroxide adjusted to H5.3, and the reaction was continued for 10 hours.
Hold for minutes. Thereafter, the nonwoven fabric was taken out, washed sufficiently with water, and dried at 105 ° C. for 1 hour. As a result, it was confirmed by observation with an electron microscope that needle crystals of about 7 nm were fixed to the fiber material.

[0032] Example 10 concentration of CrCl ₃ · 6H ₂ O aqueous solution of 10 g / l 50
0 ml, heated to 70 ° C. and adjusted to pH 3.5 with N
The polyester woven fabric was kept in the reaction solution of colloidal chromium hydroxide adjusted with aOH for 10 minutes while the fabric was immersed. After that, take out the woven fabric and wash it thoroughly with water, 105 ℃
For 1 hour. As a result, about 1
It was confirmed that 0 nm needle-like crystals were fixed to the fiber material.

Example 11 An aqueous solution of NiCl ₂ .6H ₂ O having a concentration of 10 g / l
0 ml, heated to 70 ° C. and adjusted to pH 6.0 with N
The polyester woven fabric was kept in the reaction solution of colloidal aluminum hydroxide adjusted with aOH for 10 minutes while the fabric was immersed. Then take out the woven fabric and wash it thoroughly with water,
Dry at 5 ° C. for 1 hour. As a result, it was confirmed by electron microscope observation that needle crystals of about 10 nm were fixed to the fiber material.

Comparative Example 1 A polyester woven fabric of the same quality as the fiber material used in Examples 1, 6, 8, 10, and 11 was not coated with a colloidal metal compound, but was directly treated at 105 ° C for 1 hour. Dried for hours.

Comparative Example 2 A woven fabric of polypropylene of the same quality as the fiber material used in Examples 2, 7 and 9 was dried at 105 ° C. for 1 hour without coating with a colloidal metal compound.

Comparative Example 3 Acrylic cotton of the same quality as that of the fiber material used in Example 3 was not covered with a colloidal metal compound, but was kept at 105 ° C.
For 1 hour.

Comparative Example 4 Nylon tow of 2 denier single yarn of the same quality as the fiber material used in Example 4 was dried at 105 ° C. for 1 hour without coating with a colloidal metal compound.

Comparative Example 5 A vinylon woven fabric of the same quality as that of the fiber material used in Example 5 was not covered with a colloidal metal compound, and
Dried for 1 hour at ° C.

[0039] Alizarin write Bull -B acid dye (dyeing for acid dyes), BN of 3% o w f aqueous bath ratio is _30:.. Prepared to be 1, the temperature of the dyebath 40 ° C. After warming, the fibers of Examples 1 to 11 and Comparative Examples 1 to 5 were immersed in the solution, and the temperature was gradually raised and brought to a boil in 3 minutes.
After 5 minutes dyeing, ammonium acetate 3% _o. In addition _w. F, further continued to stain for 45 minutes. After confirming that the product was colored and dyed blue-violet, it was sufficiently washed with water and dried at 105 ° C. for 1 hour. Usually, fibers such as polyester, polypropylene, acrylic and vinylon are not dyed with acid dyes, but are dyed in the present invention where the fibers are coated with a colloidal metal compound. In addition, according to the method of the present invention, clearer dyeing can be recognized even with a nylon fiber dyeable with an acid dye.

[0040] (staining with respect to direct dyes) direct dyes of the direct Gris _-.. Emissions G3% o w f, crystalline sodium sulfate 2
_{.... 0% o w} f, 1% anhydrous sodium carbonate o w bath ratio dyeing bath composition of f is 30: it was prepared to be 1, where Examples 1 to 11 and Comparative Examples 1 to 5 And the dyeing bath was gradually warmed from room temperature, boiled for 30 minutes, continued boiling for 30 minutes, and then allowed to cool for a while and then taken out. After confirming that the green color was developed and stained, wash thoroughly with
Dry at 5 ° C. for 1 hour. In general, fibers such as polyester, polypropylene and acrylic are not dyed with a direct dye, but in the present invention where these fibers are coated with a colloidal metal compound. According to the method of the present invention, clearer dyeing can be recognized even with nylon fibers and vinylon fibers dyeable with an acid dye.

[0041] (disperse dye staining with respect to) First, at room temperature dyeing, disperse dyes of Seri tons fast blue green B3% _{o. W.} F, an anionic surfactant as a dispersing agent 0.
A dyeing bath containing 5 g / l was prepared so that the bath ratio was 30: 1, and the fibers of Examples 1 to 11 and Comparative Examples 1 to 5 were immersed therein, and the dyeing bath was gradually heated from room temperature. And stained for 90 minutes. After confirming that it developed blue and stained, 50
After cooling to ℃, washed with water and dried. Normally, polyester fibers are dyed by high-temperature and high-pressure dyeing in the case of a disperse dye. Then, the high temperature in the high-pressure dyeing, disperse dyes of Seri tons fast blue green B3% _{o. W.} F
A dye bath containing 0.5 g / l of an anionic surfactant as a dispersant was prepared so that the bath ratio was 30: 1, and the fibers of Examples 1 to 11 and Comparative Examples 1 to 5 were subjected to high temperature and high pressure. Dyeing is started from 70 ° C. using a dyeing machine, and 6 hours at 125 ° C.
Stained for 0 minutes. After confirming that the color was developed and dyed blue, it was sufficiently washed with water and dried at 105 ° C. for 1 hour. In the present invention, in which the fiber is coated with the colloidal metal compound, the dyeing is also sharp by the high-temperature high-pressure dyeing.

Table 1 shows the results of the dyeability of each of the above acidic dyes, direct dyes and disperse dyes.

[0043]

[Table 1]

(Washing Fastness Test) The nonwoven fabric or woven fabric (hereinafter referred to as a sample) obtained in Examples and Comparative Examples was 10 cm ×
Cut to 4cm size, take 0.5g for cotton, crush, press and make thin layer, 0.5g for tow
And thinly layered in parallel and closely. Next, these were sandwiched between two attached white cloths of the same size and the same material and roughly sewn on four sides to obtain test pieces. This test piece was washed with 5 g of soap /
l of an aqueous solution (100 ml) and 10 stainless steel balls were immersed in a test bottle heated to 50 ° C.
After running for a minute and washing, washing, dehydration and drying were performed.

(Evaluation of discoloration and fading) The difference between the colors seen in the samples before and after the test and the difference between the colors seen between the color charts of the gray scale for discoloration are compared with those having the smallest discoloration. Those having large discoloration and discoloration were evaluated on a scale of 1 to 5 as a first class.

(Evaluation of Contamination) The difference in color between white cloths before and after the test and the difference in color between color patches of the gray scale for contamination were compared. The evaluation was performed on a five-point scale, with the majority being grade 1.

(Sunlight fastness test) The samples (non-woven fabric and woven fabric) obtained in Examples and Comparative Examples were cut into a size of 1 cm x 6 cm, and in the case of cotton, the size was 1 c.
A thin layer of such a thickness that the cardboard was invisible was attached to a white cardboard of mx 6 cm, and in the case of a tow, a test piece was obtained by tightly winding a white cardboard of 1 cm x 6 cm in the direction of its long side.
These test pieces were exposed to sunlight together with the blue scale by the second exposure method, and the test pieces and the blue scale after the exposure were left in a dark place for 2 hours.

(Evaluation of Fading) The degree of fading of the test piece and the blue scale was judged by a gray scale for discoloration and fading, and the grade with the least fading was class 8 and the grade with the most fading was grade 1. The results were shown in blue scale grades (1 to 8 grades) showing similar fading.

As described above, the washing fastness test was conducted according to JIS L08.
44 (A-2), and the sunlight fastness test is based on JIS
L0841 and the results are shown in Table 2.
And Table 3.

[0050]

[Table 2]

[0051]

[Table 3]

[0052]

The dyed fiber of the present invention has excellent effects on selection and color fastness to sunlight. Further, the method for producing a dyed fiber of the present invention is not affected by the dyeability of the fiber material, and any fiber can be used as a material at normal temperature and normal pressure.

Claims (9)

[Claims] 1. A dyed fiber obtained by dyeing a fiber whose surface is coated with a colloidal metal compound with a dye having a structure coordinating with a metal. 2. The method according to claim 1, wherein the colloidal metal compound is one or two of a metal oxide, a metal hydroxide, and a metal oxyhydroxide.
The dyed fiber according to claim 1, which is a metal compound present above. 3. The dyed fiber according to claim 1, wherein the colloidal metal compound is a copper compound. 4. The colloidal metal compound is Zn, Sn, A
The dyed fiber according to claim 1 or 2, which is a compound of l and Ti. 5. The dyed fiber according to claim 1, wherein the colloidal metal compound is a compound of Cr and Ni. 6. The dyed fiber according to claim 1, wherein the fiber is polypropylene and / or polyester. 7. The dyed fiber according to claim 1, wherein the dye is an anionic dye. 8. A method for producing a dyed fiber, comprising dyeing a fiber in which a suspended colloidal metal compound having a predetermined solution concentration is fixed in advance with a dye having a structure coordinating with metal. 9. The method for producing a dyed fiber according to claim 8, wherein the solution concentration of the suspended colloidal metal compound is 50 g / l or less.