JP2012219418A - Dyed fabric containing aramid fiber and dyeing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dyed fabric containing an aramid fiber, which is freely dyed in required hue without impairing heat resistance, fire retardancy, flame resistance and strength that the aramid fiber has, shape retainability that a polyester fiber has and a cool feeling and shape retainability that a rayon fiber has, and is superior in aesthetic properties and color fastness, and to provide a dyeing method.SOLUTION: The dyed fabric containing the aramid fiber is a fabric comprising at least the aramid fiber, the polyester fiber and the rayon fiber, is dyed after being formed into a fabric, and in which the aramid fiber is dyed with a cationic dye, the polyester fiber is dyed with a disperse dye and the rayon fiber is dyed with a threne dye. In addition, the dyeing method is to firstly dye the fabric comprising at least the aramid fiber, the polyester fiber and the rayon fiber with the cationic dye, then dye with the disperse dye and further dye with the threne dye.

Description

  The present invention is used for flame resistant clothing suitable for wearing by people engaged in work that may be exposed to flames, such as firefighters, aviators, race drivers, workers of electric power companies or chemical companies, etc. The present invention relates to a dyed fabric containing aramid fibers and a dyeing method.

  Fire-resistant processed cotton, wool, flame retardant vinylon, flame retardant rayon, etc. are known as fibers that are difficult to burn even when exposed to flames and do not melt, and are provided as flame resistant clothing materials. ing. However, these fibers did not have flame resistance enough to withstand high temperatures of 200 ° C. or higher for a long time. In addition, fabrics made of these fibers are inherently poor in heat-setting properties, so that pleats disappear or wrinkles occur while washing or wearing, and are difficult to wear. It was.

  Carbonized rayon, polybenzimidazole fiber and the like have been developed as materials having sufficient heat resistance and flame resistance, and are provided as heat and flame resistant clothing materials. However, these fibers are excellent in flame resistance and heat resistance, but have the disadvantages of poor dyeability and lack of aesthetics and inferior texture, strength, etc., and are not satisfactory as clothing materials.

  On the other hand, polymetaphenylene isophthalamide fiber is excellent in heat resistance, flame resistance, and strength, but has poor heat setting properties, and a fabric made of the fiber has a drawback of poor shape retention. On the other hand, a fabric has been proposed which uses polymetaphenylene isophthalamide fiber and polyester fiber with good heat setting properties, and has good shape retention without impairing heat resistance, flame retardancy and flame resistance. (Patent Document 1: Japanese Patent Laid-Open No. 4-50340) Thus, the problem of form retention is solved by using together with polyester fibers. However, since polymetaphenylene isophthalamide fiber has poor dyeability and cannot be dyed at the temperature at which ordinary polyester fibers are dyed, development of a method for dyeing fabrics used in combination with polyester fibers without color unevenness is desired. It is rare. In response to this, a method for coloring a stock solution with a pigment (Patent Document 2: British Patent No. 1,438,067), a method for improving dyeability by introducing a functional group (Patent Document 3: Japanese Patent Publication No. 44-11168). Many methods have been proposed, such as a method of simultaneously dyeing polymetaphenylene isophthalamide fiber and polyester fiber using a carrier (Patent Document 4: US Pat. No. 3,674,420). However, undiluted coloration with pigments has the problem that the range of hues is limited and it is not possible to deal with small lots and quick response. On the other hand, functional groups can be introduced to improve dyeability, and carriers can be used. If the polyester fibers mixed together are dyed at the same time, the disperse dye used for dyeing the polyester fibers also dyes the polymetaphenylene isophthalamide fiber, so that there is a problem that this disperse dye lowers the dyeing fastness. In addition, since soda ash, which is an auxiliary agent for reactive dyes used for dyeing rayon fibers, changes the color of the cationic dye, there is a problem of changing the hue. Further, when rayon fibers are dyed with reactive dyes or direct dyes, there is a problem that dyeing fastness, that is, light fastness, friction fastness, washing fastness and the like are deteriorated.

JP-A-4-50340 British Patent No. 1,438,067 Japanese Examined Patent Publication No. 44-11168 US Pat. No. 3,674,420

  The purpose of the present invention is to prevent aramid fiber excellent in heat resistance, flame retardancy, flame resistance, strength, polyester fiber excellent in shape retention, rayon fiber excellent in coolness and shape retention without being disturbed, It is an object of the present invention to provide a dyed fabric containing an aramid fiber that is freely dyed to a required hue and is excellent in aesthetics and dyeing fastness, and a dyeing method.

As a result of intensive studies in order to solve the above problems, the present inventor has found that such problems can be solved by the following method.
Thus, according to the present invention, a fabric comprising at least an aramid fiber, a polyester fiber, and a rayon fiber, the fabric being dyed after being formed into a fabric, the aramid fiber being dyed with a cationic dye, There is provided a dyed fabric comprising dyed aramid fibers, characterized in that the fibers are dyed with disperse dyes and the rayon fibers are dyed with slen dyes.
Also provided is a dyeing method characterized in that a fabric comprising at least aramid fiber, polyester fiber, and rayon fiber is first dyed with a cationic dye, then dyed with a disperse dye, and then dyed with a selenium dye.

  In the dyed fabric of the present invention, an aramid fiber excellent in heat resistance, flame retardancy, flame resistance and strength, a polyester fiber excellent in shape retention, and a rayon fiber excellent in coolness and shape retention are each dyed with a specific dye. As a result, it combines the characteristics of each fiber with excellent aesthetics and dyeing fastness. Further, according to the dyeing method of the present invention, even a fabric using a combination of an aromatic polyamide fiber, a polyester fiber, and a rayon fiber can be freely dyed to a required color, with no color unevenness, and with good dyeing fastness. Can do.

  The dyed fabric containing an aramid fiber of the present invention is a fabric composed of at least an aramid fiber, a polyester fiber, and a rayon fiber, and is a fabric dyed after being formed into a fabric.

  The aramid fiber used in the present invention is a fiber made of an aramid polymer, and the polymer is a polymer in which one or two or more divalent aromatic groups are linked by a direct amide bond, The group may be a divalent aromatic ring bonded with an oxygen, sulfur or alkylene group. In addition, these divalent aromatic groups may include a lower alkyl group such as a methyl group or an ethyl group, a halogen group such as a methoxy group or a chloro group, and the like.

  Specifically, para-aramid fibers made of polyparaphenylene terephthalamide and the like, copolymer para-aramid fibers such as coparaphenylene-3,4'oxydiphenylene-terephthalamide, polymetaphenylene terephthalamide, polymetaphenylene Examples thereof include meta-aramid fibers made of isophthalamide and the like.

  In the present invention, the aramid fiber is preferably a meta-aramid fiber, and is particularly preferably a fiber made of polymetaphenylene isophthalamide. For meta-aramid fibers, para-aramid fibers and / or copolymer para-aramid fibers, or both, are used in an amount of 20 wt% or less, preferably 10 wt% or less, based on the total weight of the aramid fibers contained in the dyed fabric. May be.

The polymetaphenylene isophthalamide may be a fiber made of a polymer obtained by mixing the following aromatic polyamides (a) to (c).
(A) An aromatic polyamide (Japanese Patent Laid-Open No. 55-21406) in which the amine component is 35 to 100 mol% xylenediamine, 65 to 0 mol% aromatic diamine, and the acid component is an aromatic dicarboxylic acid.
(B) An aromatic polyamide (specially characterized in that the amine component is a phenylenediamine having at least one alkyl substituent having 1 to 4 carbon atoms or an aromatic diamine having no substituent, and the acid component is an aromatic dicarboxylic acid. No. 55-21407).
(C) The amine component is composed of 40 to 100 mol% of phenylenediamine having 1 to 4 halogen substituents and 60 to 0 mol% of aromatic diamine having no substituent, and the acid component is an aromatic dicarboxylic acid. An aromatic polyamide made of JP-A-55-29516.

  In the present invention, it is more preferable that the aramid fiber is an easily dyeable polymetaphenylene isophthalamide in which an alkylbenzene sulfonic acid onium salt is contained in polymetaphenylene isophthalamide. Examples of the onium salt of alkylbenzene sulfonate include tetrabutylphosphonium hexylbenzenesulfonate, tributylbenzenephosphonium hexylbenzenesulfonate, tetraphenylphosphonium dodecylbenzenesulfonate, tributyltetradecylphosphonate dodecylbenzenesulfonate. Examples thereof include compounds such as a nium salt, tetrabutylphosphonium salt of dodecylbenzene sulfonate, and tributylbenzylammonium salt of dodecylbenzene sulfonate. Among them, tetrabutylphosphonium salt of dodecylbenzenesulfonate or tributylbenzylammonium salt of dodecylbenzenesulfonate is easy to obtain, has good thermal stability, and is highly soluble in N-methyl-2-pyrrolidone. Particularly preferred.

  As mentioned above, when the alkylbenzene sulfonic acid onium salt is contained, the ratio of the alkylbenzene sulfonic acid onium salt to the polymetaphenylene isophthalamide is preferably 2.8 to 7.0 mol%, more preferably 3.5 to 7%. 0.0 mol%. If the ratio of the onium alkylbenzene sulfonate is less than 2.8 mol%, it is difficult to obtain a sufficient dyeing effect, whereas if it exceeds 7.0 mol%, single yarn breakage may occur during yarn production. It tends to increase.

  Furthermore, it is more preferable that the polymetaphenylene isophthalamide contains a halogen-containing alkyl (phenyl) phosphate together with an alkylbenzene sulfonic acid onium salt. Examples of halogen-containing alkyl (phenyl) phosphate include tris (β-chloropropyl) phosphate, tris (2,3-dichloropropyl) phosphate, trichloroethyl phosphate, phenyl dichloropropyl phosphate, and tris (dichlorophenyl) phosphate. Among them, tris (dichlorophenyl) phosphate is preferable.

  The ratio of the halogen-containing alkyl (phenyl) phosphate to the polymetaphenylene isophthalamide is preferably 0.5 to 5.0% by weight, more preferably 1.8 to 5.0% by weight, and even more preferably 3 0.0 to 5.0% by weight. When the proportion of the halogen-containing alkyl (phenyl) phosphate is less than 0.5% by weight, specific dyeability cannot be improved. On the other hand, when it exceeds 5.0% by weight, the dyeability is not improved so much. In addition to this, uneven dyeing may occur.

  The intrinsic viscosity of the meta-aramid fiber is preferably 0.8 to 4.0, particularly preferably 1.0 to 3.0, as measured with a 0.5 g / 100 ml concentrated sulfuric acid solution (30 ° C.). Further, additives such as a flame retardant, a colorant, a light resistance improver, a matting agent, and a conductive agent may be contained as long as the object of the invention is not impaired.

Similarly, para-aramid fibers and copolymer para-aramid fibers may also contain additives such as flame retardants, colorants, light resistance improvers, matting agents and the like so as not to impair the object of the invention.
The fiber lengths of the meta-aramid fiber, para-aramid fiber, and copolymer para-aramid fiber are preferably 25 to 200 mm, respectively.

  Further, the polyester fiber used in the present invention refers to polyethylene terephthalate fiber, polybutylene terephthalate fiber, polynaphthalene terephthalate fiber, etc. that are generally used for clothing or industrial materials, and other properties to the extent that the properties of the polyester fiber are not impaired. It contains so-called modified polyester fibers such as copolyester fibers copolymerized with dicarboxylic acids or other diol components or polyester fibers with various additives such as flame retardants and antistatic agents for modification. Particularly preferred are modified polyester fibers copolymerized with. Examples of the phosphorus compound of the present invention include compounds represented by the following general formula.

Here, R represents a saturated, open chain or cyclic alkylene, arylene or alkylene residue. R ₁ represents an alkyl group, aryl group or alkyl group having 1 to 6 C atoms. Residues R and / or R ₁ may also contain one or more heteroatoms, in particular F, Cl, Br, O or S. R ₂ and R ₃ represent an alkyl group having 1 to 18 carbon atoms, an aryl group, or a hydrogen atom.

  Specific examples of the phosphorus compound include 2-carboxy-ethyl-methyl-phosphinic acid shown below or a cyclic anhydride thereof.

In the modified polyester fiber copolymerized with the phosphorus compound, the amount of phosphorus element is preferably 0.3 to 1.5% by weight in terms of the ratio of the polyester polymer constituting the polyester fiber.
The fiber length of the polyester fiber is preferably 25 to 200 mm, more preferably 30 to 150 mm.

In the present invention, the polyester fiber content is preferably 1 to 15% by weight, more preferably 5 to 15% by weight, based on the total weight of the dyed fabric. If the content of the polyester fiber is less than 1% by weight, the shape retention of the dyed fabric tends to decrease, which is not preferable. On the other hand, when the content of the polyester fiber exceeds 15% by weight, the heat resistance, heat resistance, flame retardancy, flame resistance, and strength of the dye fabric tend to be decreased particularly because the content of the aramid fiber is decreased. It is not preferable.
Furthermore, the rayon fiber used in the present invention is preferably a flame retardant rayon fiber to which a flame retardant is added.

  In the present invention, the rayon fiber content is preferably 1 to 30% by weight, more preferably 5 to 25% by weight, based on the total weight of the dyed fabric. If the content of the rayon fiber is less than 1% by weight, the cool feeling and form retention of the dyed fabric tend to decrease, which is not preferable. On the other hand, if the content of rayon fibers exceeds 30% by weight, the heat resistance, heat resistance, flame resistance, flame resistance, and strength of the dye fabric tend to decrease, particularly because the content of aramid fibers decreases. It is not preferable.

In the present invention, the fabric is dyed after being formed into a fabric, the aramid fiber is dyed with a cationic dye, the polyester fiber is dyed with a disperse dye, and the rayon fiber is dyed with a selenium dye. It is essential.
That is, the aramid fiber is substantially a cationic dye, the polyester fiber is a disperse dye, and the rayon fiber is dyed with a selenium dye. It is necessary to dye only aramid fibers with a cationic dye and then dye only polyester fibers with a selenium dye.

  The cationic dye is a water-soluble dye that is soluble in water and has a basic group, and is often used for dyeing acrylic fibers, natural fibers, or cationic dyeable polyester fibers. The cationic dye can be appropriately selected. For example, diacrylmethane and triacrylmethane, quinoneimine (azine, oxazine, thiazine), xanthene, methine (polymethine, azamethine), heterocyclic azo (thiazole) Azo, triazole azo, benzothiazole azo) and anthraquinone. Recently, there are also cationic dyes that are dispersed by blocking basic groups, but both can be used. In any case, the cationic dye is preferably a dye that causes little contamination to the polyester fiber.

The disperse dye is a dye which is hardly soluble in water and used for dyeing hydrophobic fibers from a system dispersed in water, and is often used for dyeing polyester fibers and acetate fibers. The disperse dye can be appropriately selected. For example, benzene azo series (monoazo, disazo, etc.), heterocyclic azo series (thiazole azo, benzothiazole azo, quinoline azo, pyrizone azo, imidazole azo, thiophenazo, etc.), anthraquinone series, condensation Examples thereof include quinophthalene, styryl, coumarin, and the like.
The selenium dye is a water-insoluble dye that is dissolved in an alkaline solution by a reducing action, oxidized by air, and dyed to become the original insoluble.

  The dyed fabric described above can be produced by dyeing different fibers with different dyes using the following dyeing method. That is, this is a dyeing method in which a fabric comprising at least aramid fibers, polyester fibers, and rayon fibers is first dyed with a cationic dye, then dyed with a disperse dye, and then dyed with a selenium dye.

  Usually, when dyeing a fabric mixed with different materials, in order to sufficiently dye each fiber and maintain the dyeing fastness, for example, in the case of a fabric made of polyester fiber and nylon, the polyester fiber is first treated with a disperse dye. In general, two-bath dyeing is performed, such as dyeing and then discoloring the disperse dye attached to nylon and then dyeing nylon with acid dye.

  Even in fabrics made of aramid fibers, polyester fibers, and rayon fibers, disperse dyes and reactive dyes are dyed on any of the fibers. In particular, disperse dyes dyed on aramid fibers inhibit dye fastness. Similar to polyester and nylon fabrics, disperse dyes dyed on the fiber side that impairs dye fastness are difficult to discolor, and the conditions are severe. When decoloring is performed, the polyester fiber is decolored rather than the aramid fiber, and therefore, a treatment such as a cloth in which polyester fiber and nylon are mixed cannot be employed.

  In the present invention, the fabric before dyeing is first dyed by raising the temperature to a temperature sufficient to dye aramid fibers with a cationic dye, and then dyed by raising the temperature to a temperature sufficient to dye polyester fibers with a disperse dye. And then dyeing by raising the temperature to a temperature sufficient to dye the rayon fiber with a selenium dye has been found to be effective in dyeing each fiber sufficiently and maintaining dyeing fastness. It is a thing.

  Thus, in order to dye each fiber with a dye suitable for each, a fabric comprising an aramid fiber (especially polymetaphenylene isophthalamide fiber), a polyester fiber, and a rayon fiber is preferably coated at 125 ° C. with a cationic dye. Below, more preferably dye at 120 to 125 ° C., then dye with a disperse dye, preferably 130 ° C. or more, more preferably 130 to 135 ° C., and then with a selenium dye, preferably 60 ° C. or less, more preferably May be dyed at 50 ° C to 60 ° C.

  In the above dyeing, dyeing with a disperse dye is carried out after dyeing with a cationic dye is completed. In this case, the bath containing the cationic dye may be cooled to 80 ° C. or lower, and the temperature may be increased by adding the disperse dye. Alternatively, dyeing may be performed for the first time after a bath containing a cationic dye is once drained and a dye bath containing a disperse dye is newly prepared. After dyeing with the disperse dye, dyeing with the selenium dye is performed. At this time, after cooling the bath containing the disperse dye to 80 ° C. or less, the temperature may be increased by adding the selenium dye. Dyeing may be performed for the first time after the bath containing the liquid is once drained and a new bath containing selenium dye is prepared again.

  In addition, when the dyeing temperature with a cationic dye is lowered by using easily dyed polymetaphenylene isophthalamide, the polyester fiber is a flame retardant polyester copolymerized with a phosphorus compound that can be dyed at a temperature lower than 130 ° C. For example, the dyeing temperature of the disperse dye can be lowered to prevent the disperse dye from being attached to the polymetaphenylene isophthalamide.

  In the present invention, when dyeing aramid fibers with a cationic dye, it is preferable to use a carrier agent, such as DL-β-ethylphenethyl alcohol, 2-ethoxybenzyl alcohol, 3-chlorobenzyl alcohol, 2,5-dimethylbenzyl alcohol, 2-nitrobenzyl alcohol, p-isopropylbenzyl alcohol, 2-methylphenethyl alcohol, 3-methylphenethyl alcohol, 4-methylphenethyl alcohol, 2-methoxybenzyl alcohol, 3-iodobenzyl alcohol, It is preferably at least one selected from cinnamon alcohol, p-anisyl alcohol and benzhydrol. As specific products, benzyl alcohol, Dow Chemical Pwanol PPH, and BOZETTO CINDYEDNK are desirable. Moreover, it is preferable to use benzyl alcohol, especially 2, 5- dimethyl benzyl alcohol or 2-nitro benzyl alcohol from the point which improves whiteness more.

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples.
(1) Dyeability Colorimetry was performed with a Macbeth spectrophotometer (Color-Eye3100), and the color density (hue density) K / S was apparent. K / S is obtained from the reflectance R at the maximum absorption wavelength of the dyed sample by the Kubelka-Munk equation shown in the following equation. Red (540 nm) was used as the measurement wavelength.
K / S = (1-R) ² / 2R
(2) Dye fastness (a) Light fastness Using a UV fade meter manufactured by Suga Test Instruments Co., Ltd., measurement was performed by irradiation for 20 hours in accordance with JIS L0842 third exposure method. Grade 3 or higher was accepted.
(B) Fastness to washing Measured according to JIS L0844, and grade 3 or higher was accepted.
(C) Fastness to friction Measured according to JIS L0849II type. Grade 3 or higher was accepted for both drying and wetting.

[Example 1]
Meta-type aramid fiber having a single yarn fineness of 1.7 dtex, a fiber length of 51 mm, and a crimped number of 11 / 2.5 cm (manufactured by Teijin Techno Products, trade name “Conex”), a single yarn fineness of 2.2 dtex, a fiber length of 51 mm, Polyethylene terephthalate short fiber (semi-dal) copolymerized with 2-carboxy-ethyl-methyl-phosphinic acid having a crimped number of 12 / 2.5 cm and a phosphorus element amount of 0.6% by weight of polymer ratio (manufactured by Teijin Fibers Limited) ) In addition, a flame-retardant rayon fiber (manufactured by Lenzing) having a single yarn fineness of 2.2 dtex, a fiber length of 51 mm, and a crimp number of 10 / 2.5 cm is mixed at a weight ratio of 60/15/25, and the hair count A 2/68 spun yarn was made, and a twill having a warp density of 88 yarns / inch and a weft density of 74 yarns / inch was woven. This fabric was baked, scoured, dried, and heat-treated to obtain an undyed fabric.
The obtained undyed fabric was dyed at 120 ° C. for 60 minutes in a dyeing bath shown in Table 1 containing a cationic dye (Kayacryl Red GL-ED manufactured by Nippon Kayaku Co., Ltd.). Subsequently, the dyeing bath of Table 2 newly containing a disperse dye (Kayalon Polyester Red BR-S manufactured by Nippon Kayaku Co., Ltd.) was heated from room temperature and dyed at 130 ° C. for 60 minutes. Subsequently, the temperature was raised from room temperature and dyed at 60 ° C. for 60 minutes in the dyeing bath of Table 3 newly containing a selenium dye (Novasol RED 2B MD manufactured by Huntsman). In addition, the above dyeing | staining was put into the said dyeing bath, the textiles were set to the liquid dyeing machine (Hisaka Seisakusho high temperature circular), respectively, and it performed on the said temperature conditions, stirring.
Further, hydrosulfite 1 g / L, soda ash 1 g / L, and a surfactant (Amiradine D 1 g / L manufactured by Meisei Chemical Co., Ltd.) were dissolved in water to prepare a post-treatment bath for reduction cleaning. The dyed fabric is put into this post-treatment bath, set in the above-mentioned liquid dyeing machine, and the temperature is raised from room temperature to 80 ° C. at a heating rate of 2 ° C./min with stirring, and further at 20 ° C. for 20 minutes. For 5 minutes, and reduction cleaning was performed. After cooling, the dyed product was taken out, washed with water, air-dried and heat-treated to finish. The heat treatment was performed at a temperature of 190 ° C. for 2 minutes to obtain a dyed fabric. The results are shown in Table 5.

[Example 2]
30 g of polymetaphenylene isophthalamide having an intrinsic viscosity (IV) of 1.35 dl / g is dissolved in 110 g of N-methyl-2-pyrrolidone (NMP), and 3.6 g of tributylbenzylammonium dodecylbenzenesulfonate is mixed and dissolved. Then, a vacuum dope was used to obtain a spinning dope.
This dope was heated to 85 ° C. and wet-spun into a coagulation bath from a spinneret having a diameter of 0.07 mm and a hole number of 200. The composition of the coagulation bath was 40% by weight of calcium chloride, 5% by weight of NMP, 55% by weight of the remaining water, and the temperature of the coagulation bath was 85 ° C.
After running this thread about 10 cm in the coagulation bath and pulling it out at a speed of 6.2 m / min, the thread is washed with water, stretched 3.3 times with warm water at 95 ° C, and dried with a roll at 120 ° C. Then, it was drawn 1.0 times on a hot plate at 300 ° C. to obtain a drawn yarn of 444 dtex / 200 filament. 100 drawn yarns were bundled into a tow, which was cut after crimping. The obtained meta-aramid fiber had a single yarn fineness of 1.7 dtex, a fiber length of 51 mm, and a number of crimps of 10 / 2.5 cm.
A dyed fabric was obtained in the same manner as in Example 1 except that the above-mentioned meta-aramid fiber was used in place of the meta-aramid fiber of Example 1 (trade name “Conex” manufactured by Teijin Techno Products). The results are shown in Table 5.

[Example 3]
A dyed fabric was obtained in the same manner as in Example 1 except that the dyeing temperature of the cationic dye, disperse dye, and selenium dye was changed as shown in Table 5. The results are shown in Table 5.

[Comparative Example 1]
Using the undyed fabric obtained in the same manner as in Example 1, the dyeing bath shown in Table 2 was heated from room temperature to 130 ° C. and dyed for 60 minutes. The temperature was raised from normal temperature and dyed at 120 ° C. for 60 minutes, and then the temperature was raised from normal temperature in the same manner as in Table 3 and dyed at 60 ° C. for 60 minutes. Otherwise, a dyed fabric was obtained in the same manner as in Example 1. The results are shown in Table 5.

[Comparative Example 2]
Using the undyed fabric obtained in the same manner as in Example 1, using a dyeing bath shown in Table 2, the temperature was raised from room temperature and dyed at 130 ° C. for 60 minutes, and then the dyed fabric was treated in the same manner as in Example 1. Obtained. The results are shown in Table 5.

[Comparative Example 3]
Using an undyed fabric obtained in the same manner as in Example 1, using a dyeing bath shown in Table 3, the temperature was raised from room temperature to 60 ° C. and dyed for 60 minutes, and then the dyed fabric was treated in the same manner as in Example 1. Obtained. The results are shown in Table 5.

[Comparative Example 4]
Using an undyed fabric obtained in the same manner as in Example 1, using a dyeing bath shown in Table 1, the temperature was raised from room temperature to 120 ° C. and dyed for 60 minutes, and then the dyed fabric was treated in the same manner as in Example 1. Obtained. The results are shown in Table 5.

[Comparative Example 5]
A dyed fabric was obtained in the same manner as in Example 1, except that the reactive dye was used instead of the selenium dye, and the temperature was similarly raised from room temperature in the dye bath shown in Table 4 and dyed at 60 ° C. for 60 minutes. The results are shown in Table 5.

  The dyed fabric of the present invention is composed of an aramid fiber excellent in heat resistance, flame retardancy, flame resistance and strength, a polyester fiber excellent in shape retention, and a rayon fiber excellent in coolness and shape retention in a required hue and dyeing fastness. It is dyed well and combines the properties and aesthetics of each fiber, making it suitable for clothing materials. For this reason, the dyed fabric is suitable for being worn by people engaged in work that may be exposed to fire, such as firefighters, aviators, race drivers, workers of electric power companies or chemical companies. It can be widely applied to clothes. Further, according to the dyeing method of the present invention, even a fabric using aramid fibers, polyester fibers, and rayon fibers can be dyed vividly and freely in necessary colors without uneven color and with good dyeing fastness. It can be used and has very high industrial utility value.

Claims (8)

  A fabric comprising at least an aramid fiber, a polyester fiber, and a rayon fiber, the fabric being dyed after being formed into a fabric, the aramid fiber being dyed with a cationic dye, and the polyester fiber being dyed with a disperse dye A dyed fabric comprising aramid fibers, wherein rayon fibers are dyed with a selenium dye.   The dyed fabric containing an aramid fiber according to claim 1, wherein the aramid fiber is a fiber made of polymetaphenylene isophthalamide.   The dyed fabric containing an aramid fiber according to claim 1 or 2, wherein the polyester fiber is a flame-retardant polyester fiber.   The dyed fabric containing an aramid fiber according to claim 3, wherein the flame-retardant polyester fiber is a polyester fiber copolymerized with a phosphorus compound.   The dyed fabric containing an aramid fiber according to any one of claims 1 to 4, wherein the rayon fiber is a flame retardant rayon fiber.   The dyed fabric containing an aramid fiber according to any one of claims 1 to 5, wherein the content of the polyester fiber is 1 to 20% by weight based on the total weight of the dyed fabric.   The dyed fabric containing an aramid fiber according to any one of claims 1 to 6, wherein the rayon fiber content is 1 to 30% by weight based on the total weight of the dyed fabric.   A dyeing method characterized in that a fabric comprising at least an aramid fiber, a polyester fiber, and a rayon fiber is first dyed with a cationic dye, then dyed with a disperse dye, and further dyed with a selenium dye.