JP3021060B2 - Deep-colored polyester fiber fabric and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deep-colored polyester fiber fabric and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, many studies have been made to improve the deep hue, particularly the deep color of black, especially in polyester fibers. For example, a compound having a low refractive index, such as a fluorine-based treating agent (JP-A-57-176275), a silicon-based treating agent (JP-A-64-45466, etc.), a urethane-based treatment, is applied to a dyed fiber cloth. There is a method of coating the fiber surface with an agent (JP-A-57-29682). The level of deep coloration can be improved by these means, but with the improvement of deep color, problems such as a decrease in deep color degree due to dry cleaning washing treatment and bleeding out of color due to dye bleed out are likely to occur However, there was a problem in durability of the deep color effect. Another problem is that when an antistatic agent is used to prevent dust and the like from adhering, the deep-colored property is reduced.

On the other hand, there is a method in which fine irregularities are formed on the fiber surface to prevent irregular reflection of light on the fiber surface and aim at deepening the color. As a technical means, polyester fibers to which a microporous forming agent is added are used. Method of removing microporous forming agent by alkali treatment (Japanese Patent Application Laid-Open No. 54-120728, etc.)
And a method of forming fine irregularities by plasma etching the fiber surface (JP-B-59-11709, JP-B-60-37225, etc.). Moreover,
There is also a method of treating a fiber product with a compound having a low refractive index in advance, and then performing a low-temperature plasma treatment (Japanese Patent Application Laid-Open No. 61-9 / 1986).
No. 7490). By forming fine irregularities on the fiber surface by these methods, the deep coloration is also improved, and particularly when the surface is coated with a compound having a low refractive index, the deep color degree is considerably improved, but the irregularities on the fiber surface are improved. If the fabric is easily broken, for example, the fabrics are rubbed together or the fabrics are entangled in washing, the deep-color effect is easily reduced extremely, and it cannot be said that the deep-color durability is always at a sufficient level in terms of the durability of the deep color. In addition, in terms of dyeing fastness, there is a problem that the level of rub fastness is particularly low.

[0004]

SUMMARY OF THE INVENTION The present invention aims to reduce the problems of the conventional deep-coloring technology, particularly the durability of the deep-color effect at a high level of deep-coloring and the fastness to friction to a level at which there is no practical problem. It is an object to provide an improved dyed polyester fiber fabric.

[0005]

According to the present invention, there is provided a deep-colored polyester fiber cloth, wherein the surface of the dyed polyester fiber cloth is coated with fine silica particles having amino groups and amino-modified silicon via a polyepoxide compound. And a method for producing the same.

The present invention is directed to dyed polyester fibers. Here, the dyed polyester fiber refers to a fiber that has been heat-treated at a high temperature of 100 ° C. or higher using a dye. Generally, a disperse dye is used as the dye. Dyes or acid dyes may be used. As a dyeing method, any of dip dyeing, thermosol, and printing can be applied. The polyester fiber in the present invention, ethylene glycol, trimethylene glycol, glycol components such as 1,4-butanediol, terephthalic acid,
Polycondensates with dicarboxylic acid components such as isophthalic acid, malonic acid, and succinic acid; polyester copolymers obtained by copolymerizing other third components as part of a glycol component or a dicarboxylic acid component; or these polyester polymers And other polymers.

[0007] The polyester fiber may contain optional additives, such as a catalyst, a coloring inhibitor, a heat-resistant agent, a flame retardant, an antioxidant, and inorganic fine particles, if necessary. In the present invention, the polyester fiber may be used by blending, cross-knitting, weaving, or the like with natural fibers such as cotton and wool, regenerated fibers such as rayon and acetate, and synthetic fibers other than polyester, if necessary. Absent. Further, in the present invention, even a polyester fiber which has been subjected to an alkali weight reduction treatment can be used, and thereby a sufficient deep color effect can be exhibited.

The polyepoxide compound used in the present invention is preferably a compound containing at least two or more epoxy groups in one molecule, more preferably at least 0.2 g equivalent per 100 g of the compound. Used as a reaction product of polyhydric alcohols such as ethylene glycol, glycerol, sorbitol, pentaerythritol, and polyethylene glycol with halogen-containing epoxides such as epichlorohydrin, resorcinol bis (4-hydroxyphenyl) dimethylmethane, phenol-formaldehyde Resins, reaction products of polyhydric phenols such as resorcinol-formaldehyde resin and the above-mentioned halogen-containing epoxides, polyepoxidation obtained by oxidizing unsaturated compounds with peracetic acid or hydrogen peroxide, etc. 3,4-epoxycyclohexyl compounds, such as 3,4-epoxycyclohexene epoxide, 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexenecarboxylate, bis (3,4-epoxy-6-methyl-cyclohexyl) Methyl) adipate and the like.
Among them, a reaction product of a polyhydric alcohol and epichlorohydrin, that is, a polyglycidyl ether compound of a polyhydric alcohol is particularly preferred because it exhibits excellent performance.

[0009] When the number of epoxy groups contained in one molecule is 3 or more, affinity with polyester fiber is particularly good, and a deep color processing agent to be processed later is excellent in deep color durability, which is preferable. Further, the polyepoxide compound generally contains a compound containing a slight isomer or chlorine at the time of synthesis. The mechanism by which the chlorine-containing polyepoxide compound reacts with the polyester fiber has not been elucidated, but it is presumed that electrical coupling is acting, and the polyepoxide compound of the present invention preferably contains chlorine. Here, the total chlorine amount is obtained by decomposing covalent chlorine with metallic sodium, quantifying the chlorine amount by the Horhard method, and calculating the weight%.
The total amount of chlorine contained in the polyepoxide compound of the present invention is preferably 6% by weight or more, more preferably 10% by weight or more, from the viewpoint of durability of deep color.

[0010] The polyepoxide compound is usually preferably used as an emulsion. To prepare an emulsion or a solution, for example, such a polyepoxide compound as it is or dissolved in a small amount of solvent as needed,
Emulsification or dissolution is performed using a known emulsifier, for example, sodium alkylbenzene sulfonate, dioctyl sulfosuccinate sodium salt, nonylphenol ethylene oxide adduct and the like.

In the present invention, the amount of the polyepoxide compound used is not particularly limited. However, in order to impart durable deep color to the polyester fiber, it is used in the range of 0.1 to 10% by weight based on the polyester fiber. Are exemplified. If the amount of the polyepoxide compound is less than 0.1% by weight, a durable deep color effect cannot be obtained, while
If it exceeds 0% by weight, it is not always preferable that the deep color and the durability thereof are not always improved, and a feeling and other defects are caused.

The treatment temperature of the polyepoxide compound is preferably in the range of 70 to 130 ° C., and is preferably in the range of 80 to 100 ° C.
Is more preferable. When the treatment temperature with the polyepoxide compound is lower than 70 ° C., the durability of the deep-colored color is insufficient. On the other hand, when the temperature exceeds 130 ° C., the durability of these properties is not necessarily further improved, but may be rather lowered. Therefore, it is preferable to process in the above range. Further, the treatment time of the polyepoxide compound is preferably 1 minute or more, and more preferably 5 to 60 minutes. If such a condition is satisfied, the processing method may be a high-temperature continuous processing, or a so-called batch-type processing in which fibers are charged from a normal temperature, and then the temperature is raised and the processing is performed at a predetermined temperature.

Next, the silica fine particles having an amino group used in the present invention preferably have an average particle diameter of 1 μm.
It is a compound obtained by reacting the following fine powdered silica with a solution of aminosilane dissolved in water or a lower alcohol such as methanol. When the average particle diameter of the silica fine particles having an amino group exceeds 1 μm, the deep color effect becomes insufficient and the texture becomes coarse and hard.

[0014] Silica fine particles having an amino group can be obtained, for example, by adding gamma (2-aminoethyl) -aminopropyltrimethoxysilane or aminopropylethoxysilane to Aerosil # 200 (manufactured by Nippon Aerosil Co., Ltd.) in water or a lower alcohol such as methanol. It can be easily obtained by bringing the dissolved liquid into contact with a spray or the like. Here, the ratio (weight ratio) of Aerosil # 200 to aminosilane is generally preferably 100: 0.01 to 100: 100, and more preferably 100: 0.1 to 100: 3.

These silica fine particles having an amino group include, for example, toluene, xylene, n-hexane, heptane, acetone, methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, butyl acetate, mineral terpen,
A treatment liquid is prepared by dissolving in an organic solvent such as isopropyl alcohol, and may be adhered to the polyester fiber cloth by a method such as spraying, mangle, immersion, or may be self-emulsified as it is, or a suitable emulsifier such as a higher alcohol Sulfate, alkylbenzene sulfonate, higher alcohol polyoxyalkylene adduct,
It may be emulsified with a higher fatty acid polyoxyalkylene adduct, a higher fatty acid sorbitan ester, or the like, and adhered to a polyester fiber cloth by a method such as spraying, mangled or dipped.

In the present invention, the amount of the silica fine particles having an amino group is preferably 0.1 to 10% by weight, more preferably 0.5 to 10% by weight, based on the polyester fiber cloth.
３3% by weight. The more the amount is used, the higher the deep-color effect, but on the other hand, problems such as deterioration of durability, drastic reduction of friction fastness, and rough feeling of hand arise. On the other hand, if the content is less than 0.1% by weight, the deep color effect is poor, which is not preferable.

Next, the amino-modified silicon used in the present invention is preferably represented by the following general formula [I]. (Wherein, m is an integer of 5 to 500, n is 1 to 50, R
Represents a hydrogen atom, a methyl group or an ethyl group, and R 'represents a divalent hydrocarbon group. )

In the general formula [I], if m is less than 5, it is difficult to synthesize a stable compound, and if m is more than 500, it is difficult to obtain the desired performance of the present invention. The range is 200. Also, n is 1 to 50
When n is 0, the durability of the deep color effect cannot be obtained. On the other hand, when n exceeds 50, the processing tends to be unstable.

In the general formula [I], R needs to be a hydrogen atom, a methyl group or an ethyl group, and other alkyl groups are difficult to produce and have poor durability of the deep color effect. Also, R 'is a divalent hydrocarbon radical, for example _{-CH 2 -, - (CH 2} ) 2 -, - (CH 2) 3 -, -
Examples thereof include an alkylene group such as (CH ₂ ) ₄ — and —CH ₂ CH (CH ₃ ) CH ₂ — and an alkylene arylene group such as — (CH ₂ ) ₂ —C ₆ H ₄ —. this house,
Propylene groups are most common.

These amino-modified silicons are prepared by using, for example, octamethyltetrasiloxane and gamma- (2-aminopropyl) trimethoxysilane as raw materials, and mixing these raw materials with an alkali metal catalyst, for example, sodium hydroxide or potassium hydroxide. The mixture can be easily prepared by heating the mixture to a temperature of 70 to 120 ° C. high enough to cause equilibration of the raw materials (rearrangement of siloxane units).

These amino-modified silicons are dissolved in an organic solvent such as toluene, xylene, n-hexane, heptane, acetone, methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, butyl acetate, mineral terpene, isopropyl alcohol, and the like. May be prepared, sprayed, mangled, adhered to a polyester fiber fabric by a method such as immersion, or may be self-emulsified as it is, or a suitable emulsifier, for example, a sulfate salt of a higher alcohol, an alkylbenzene sulfonate,
It may be emulsified with a higher alcohol polyoxyalkylene adduct, a higher fatty acid polyoxyalkylene adduct, or a higher fatty acid sorbitan ester, and adhered to the polyester fiber cloth by a method such as spraying, mangled or dipped.

In the present invention, the amount of the amino-modified silicone used is preferably 0.05 to 1% by weight, more preferably 0.1 to 0.5% by weight based on the polyester fiber cloth.
% By weight. The amount of amino-modified silicon used is 0.05
If the amount is less than 1% by weight, the deep color effect is insufficient. On the other hand, if the amount is more than 1% by weight, the texture of the processed fabric becomes excessively soft or a defect occurs in the color fastness. Absent.

The silica fine particles having amino groups and amino-modified silicon of the present invention preferably have a low refractive index of 1.5 or less. Since the refractive index of the polyester fiber is 1.7, even if the refractive index exceeds 1.5 and is about 1.6, deep color is recognized but insufficient. More preferably, when the refractive index of the silica fine particles having amino groups and the amino-modified silicon is 1.4 or less, excellent deep color property is recognized.

As a method for producing the deep-colored polyester fiber cloth of the present invention, a dyed polyester fiber cloth is heat-treated with a treatment liquid containing a polyepoxide compound, and then the polyester fiber cloth is treated with silica fine particles having amino groups. After being treated with the amino-modified silicon represented by the general formula [I] or after heating a dyed polyester fiber cloth with a treatment liquid containing a polyexide compound, the polyester fiber cloth is treated with silica fine particles having amino groups. And then treating with the amino-modified silicon represented by the general formula [I].

In the production method of the present invention, unless the dyed polyester fiber cloth is first pretreated with a polyepoxide compound, the effects of the invention (improvement of durability of deep color effect and improvement of friction fastness) cannot be obtained. In addition, when pre-treating with the polyepoxy compound and then treating with silica fine particles and amino-modified silicon, treatment with amino-modified silicon and then with silica fine particles has a small effect of improving the deep color. This is because the silica particles cannot be applied to the polyester fiber cloth because the amino-modified silicon has a slight water repellency.

In the above production method, when the silica fine particles and the amino-modified silicon are treated in the same bath, the effect of improving the deep color is good. Furthermore, in the case of treating with silica fine particles and finally treating with amino-modified silicon, the effect of improving the deep color is particularly large.

[0027]

The present invention is characterized in that a polyester fiber cloth is pretreated with a treatment liquid containing a polyepoxide compound in advance. By this pretreatment, it is not clear how the polyepoxide compound adheres to the polyester fiber fabric, but the durability is excellent without impairing the initial deep color effect even if washing, dry cleaning and friction treatment are performed. Estimated from that, since the polyepoxide compound is firmly attached to the polyester fiber surface, or partially penetrates into the inside of the polyester fiber, silica particles having an amino group and amino-modified silicon which are added later are It is considered that the polyester fiber reacts with the epoxy group of the polyepoxide compound to coat the polyester fiber surface with high durability.

[0028]

The present invention will be described in more detail with reference to the following examples. The percentages are based on weight unless otherwise specified. The measurement of performance, washing, dry cleaning, friction treatment and evaluation in the examples were performed under the following conditions.

Measurement of Deep Color The deep color degree (K / S) was used as a scale indicating the deep color effect. This value is represented by the following Kubelka-M, given that the reflectance of the sample at 500 nm is R.
unk). K / S = (1
-R) ² / 2R The larger the value, the greater the deep color effect. Measurements were made using Macbeth Color Eye (Macb
ethCOLOR-EYE Model M-2020PL)
Performed using

Laundry treatment Using a domestic electric washing machine (National, NA-680L), 30 l of a 2 g / l solution of a new enzyme Zab (Kao) was added.
A cotton cloth was added together with the sample so that the bath ratio was 1:30, and the mixture was washed with a swirling water stream at 40 ° C. for 10 minutes. Thereafter, it was dehydrated, washed with 30 l of warm water at 40 ° C. for 5 minutes, dehydrated, washed with overflow water for 10 minutes, dehydrated, and air-dried. This process was repeated five times, and the washing was performed five times, and the deep color was measured.

The dry cleaning process is performed according to the method specified in JIS-L-0844, and this process is repeated five times to obtain a dry cleaning process five times.
The deep color was measured. According to the friction fastness testing rubbing JIS-L-0849, equipped with a sample test stand, attached to the contact surface of the friction element to be friction sample and the same sample was about 100% wet state with distilled water as a friction cloth, It was rubbed back and forth 20 times with a load of 200 g, and the deep color of the friction portion of the friction cloth was measured.

Evaluation of deep-coloredness The results were evaluated as の when the difference in K / S after dyeing and after dyeing was 10 or more, Δ when 5-9.9, and × when 0-4.9. ；: Good △: somewhat good ×: insufficient durability evaluation The deep color processing finish and the K / S decrease after washing 5 times or dry cleaning 5 times or friction treatment are 0 to 3;
3.1 to 5.0 were evaluated as Δ, and 5.1 or more as X. ；: Good △: somewhat good ×: insufficient

Test method of friction fastness JIS-L-0849-71 (dry type, wet type)
Was evaluated according to ；: Good △: somewhat good ×: insufficient

Example 1 A polyester filament yarn having an elongation of 115% (115 denier / 24 filaments) obtained by spinning at a spinning speed of 3,200 m / min and an elongation obtained by spinning at a spinning speed of 1,380 m / min. A 345% polyester filament yarn (225 denier / 72 filaments) was aligned and subjected to entanglement treatment and stretch false twisting. That is, an interlace nozzle gives an entangling degree of 60 pieces / m at an overfeed rate of 2.5% and a pneumatic pressure of 3.5 kg / cm ² , followed by a draw ratio of 1.56 times, a heater temperature of 180 ° C., and a friction The surface speed of the twisting device is 630m /
And a second delivery roller speed of 350 m / min and a K value (untwisting tension / twisting tension) of 1.05. The obtained processed yarn has an average of 8/10 wound part.
mm, there was a gap between the filaments, and there were, on the whole, gently convergent winding portions at two places / 10 mm.

Using the thus obtained false-twisted two-layer structure yarn, satin georgette fabric was woven as shown in Table 1 below.

[Table 1] The obtained woven fabric was subjected to ordinary crimping, heat setting, and alkali weight reduction (weight loss rate of 20%), and then dyed and reduced under the following conditions. Dyeing conditions: Dianix Black HG-FS 200% conch product (Mitsubishi Kasei Kogyo Co., Ltd.) 8% owf Disper VG (Meisei Chemical Co., Ltd. product) 0.5 g / l acetic acid 0.2 g / l Bath ratio 1:20 Dyeing Temperature / time 130 ° C. × 30 min. Reduction washing condition: NaOH 1 g / l hydrosulfite 2 g / l Bath ratio 1:20 Treatment temperature / time 80 ° C. × 30 min. Thereafter, water washing and drying were performed.

Then, it is immersed in a treatment solution adjusted to the following formulation (A) (bath ratio 1:20), heated from normal temperature at a rate of 2 ° C./min, treated at 100 ° C. for 30 minutes, washed with water and dried did.
Subsequently, the woven fabric was impregnated in a padding bath adjusted according to the following formula (B), and squeezed at a squeezing rate of 100%.
After drying at 0 ° C. for 1 minute, heat treatment was performed at 160 ° C. for 1 minute. Finally, the woven fabric was impregnated in a padding bath adjusted according to the following formula (C), squeezed at a squeezing ratio of 100%, dried at a temperature of 120 ° C for 1 minute, and then heat-treated at a temperature of 160 ° C for 1 minute. The woven fabric after the treatment was evaluated for deep color and durability, and the results are shown in Table 2.

[Formulation (A)] sorbitol polyglycidyl ester represented by the following formula (a)
-Tel 5% owf

Embedded image (Product name, Denacol EX-611, total chlorine content 13.5
%, Manufactured by Nagase Kasei Co., Ltd.) This sorbitol polyglycidyl ether (Denacol EX-611) was previously emulsified with an emulsifier (trade name, Neocol SW, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.) (use ratio Denacol EX-611). /
Neocol SW = 5/4) was used.

[Prescription (B)] Gamma (2-aminoethyl) -aminopropyltrimethoxysilane was added to 1% silica fine particles having amino groups, Aerosil # 200 (manufactured by Nippon Aerosil Co., Ltd., particle size: 200 m ² / g). It was dissolved in water at a ratio of 100: 1, contacted with a spray, and dispersed in a solid content of 20% (refractive index: 1.38). [Formulation (C)] Amino-modified silicon 3% In the general formula [I], m = 100, n = 10, R =-
An amino-modified silicon having CH ₃ , R ′ = — CH ₂ CH ₂ CH ₂ — is produced by a conventional method, and the obtained amino-modified silicon (refractive index: 1.40) is emulsified by adding a usual emulsifier. 3% solution of amino-modified silicone emulsion emulsified to 30% by a machine.

Example 2 The same treatment as in Example 1 was carried out except that the same fabric as in Example 1 was used, and after the treatment of the prescription (A), the prescription (B) and the prescription (C) were carried out in the same bath treatment. And evaluated. Table 2 shows the results.
As is clear from Table 2, the effect of improving the deep color is obtained.

Comparative Example 1 The same procedure as in Example 1 was carried out except that the same fabric as in Example 1 was used, and the treatment with the prescription (A) was not performed, and the treatment with the prescription (B) was followed by the treatment with the prescription (C). It processed and evaluated similarly. Table 2 shows the results. As is evident from Table 2, the durability of the deep color is insufficient. Comparative Example 2 The same fabric as in Example 1 was used and evaluated in the same manner as in Example 1 except that after the treatment of the prescription (A), only the prescription (B) was processed. Table 2 shows the results. As is clear from Table 2, the durability of the deep color and the fastness to friction are poor.

Comparative Example 3 The same fabric as in Example 1 was used and evaluated in the same manner as in Example 1 except that after the treatment of the prescription (A), only the prescription (C) was processed. Table 2 shows the results. As is clear from Table 2, the effect of improving the deep color is insufficient.

[0042]

[Table 2]

Example 3 Glycerol polyglycidyl ether represented by the following formula (b) was used in place of the compound of formula (A), using the same woven fabric as in Example 1.

Embedded image (Total chlorine amount 9%, trade name: Denacol EX-313, manufactured by Nagase Kasei Co., Ltd.) was treated and evaluated in the same manner as in Example 1. Table 3 shows the results.

Example 4 Using the same woven fabric as in Example 1, triglycidyl tris (2-hydroxyethyl) isocyanate having 3 epoxy groups and a total chlorine content of 11.5% was used instead of the compound of the formula (A). Except for using 5% of Nurate (trade name: Denacol EX-301, manufactured by Nagase & Co., Ltd.), the treatment and evaluation were performed in the same manner as in Example 1. Table 3 shows the results. Comparative Example 4 The same woven fabric as in Example 1 was treated with Denacol EX-313 used in Example 3 in place of the compound of Formula (A), and modified urethane having a refractive index of 1.51 was obtained as Formula (B). Except for using a compound (unknown structure, manufactured by Kao Corporation), treatment was performed in the same manner as in Example 1 and evaluated. Table 3 shows the results.
As shown in Table 3, the initial deep color was insufficient.

Example 5 Using the same fabric as in Example 1, the number of epoxy groups was 3 and the total chlorine content was 5% instead of the compound of the formula (A) of Example 1.
Glycerol polyglycidyl ether of 5% was used. Table 3 shows the results. Example 6 Using the same woven fabric as in Example 1, the number of epoxy groups was 2 and the total chlorine content was 9. instead of the compound of the formula (A) of Example 1.
5% of ethylene diglycidyl ether of the following formula Except using 5%, it processed and evaluated similarly to Example 1. Table 3 shows the results.

Example 7 The same fabric as in Example 1 was used, and the number of epoxy groups was one and the total chlorine content was 1.
5% of lauryl alcohol (EO) ₁₅ glycidyl ether of the formula Except using 5%, it processed and evaluated like Example 1. Table 3 shows the results. Comparative Example 5 The same woven fabric as in Example 1 was dyed and reduced and washed in the same manner as in Example 1 except that the treatment of Formulations (A), (B) and (C) was not carried out in order to clarify the level of dyeing. After performing the above, the deep color was measured and evaluated. Table 3 shows the results.

[0047]

[Table 3]

[0048]

According to the present invention, a polyester fiber cloth having a high level of deep color, excellent durability, and excellent friction fastness can be obtained.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI D06M 13/50 15/643 (56) References JP-A-61-186582 (JP, A) JP-A-56-112583 (JP, A) JP-A-61-97490 (JP, A) JP-A-64-45466 (JP, A) JP-A-57-205588 (JP, A) JP-A-57-66184 (JP, A) (58) Survey Field (Int.Cl. ⁷ , DB name) D06P 5/06 D06M 13/11 D06M 13/513 D06M 15/643

Claims (7)

(57) [Claims] 1. A deep-colored polyester fiber cloth characterized in that the surface of a dyed polyester fiber cloth is coated with fine silica particles having amino groups and amino-modified silicon via a polyepoxide compound. 2. The deep-colored polyester fiber cloth according to claim 1, wherein the polyepoxide compound contains three or more epoxy groups in one molecule and contains 6% by weight or more of chlorine. 3. The deep-colored polyester fiber cloth according to claim 1, wherein the average particle diameter of the silica fine particles having an amino group is 1 μm or less. 4. An amino-modified silicon represented by the following general formula [I]
The deep-colored polyester fiber cloth according to claim 1, which is represented by the following formula: (Wherein, m is an integer of 5 to 500, n is 1 to 50, R
Represents a hydrogen atom, a methyl group or an ethyl group, and R 'represents a divalent hydrocarbon group. ) 5. The silica fine particles having an amino group and the amino-modified silicon have a refractive index of 1.5 or less.
The deep-colored polyester fiber cloth according to the above. 6. A dyed polyester fiber cloth is heat-treated with a treatment liquid containing a polyepoxide compound, and then the polyester fiber cloth is treated with fine silica particles having amino groups and the amino-modified silicon according to claim 1. A method for producing a deep-colored polyester fiber cloth. 7. A dyed polyester fiber cloth is heat-treated with a treatment liquid containing a polyexide compound, and then the polyester fiber cloth is treated with fine silica particles having amino groups, and then treated with the amino-modified silicon according to claim 1. A method for producing a deep-colored polyester fiber cloth.