JP2002302870A - Antistatic polyester fiber structure and method for producing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polyester fiber structure having durable antistatic properties imparted without damaging the color fastness and the feeling, and further to provide a method for producing the fiber structure. SOLUTION: When a fiber structure consisting essentially of a polyester fiber is finished with a polyester-polyether block copolymer, a creep-promoting compound having >=4 creep-promoting coefficient is used together with the copolymer. The finished product is further finished with a water-soluble thermally reactive urethane having a blocked isocyanate group, and the resultant product is subjected to a heat treatment to provide the objective antistatic polyester fiber structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an antistatic polyester fiber structure having excellent durability and a method for producing the same.

[0002]

2. Description of the Related Art Polyester fiber products have excellent physical properties. However, since they are hydrophobic fibers, they have hygroscopicity, water absorption,
There are drawbacks such as poor sweat absorption, accumulation of static electricity, and difficulty in removing oily dirt.

[0003] As a method of improving these disadvantages, a number of processing methods have been conventionally proposed. Among them, there are roughly two methods. One is a method of modifying the fiber itself, and the other is a method of modifying the surface by post-processing.

[0004] The method of modifying the fiber itself, although exhibiting durability, has problems such as lowering the physical properties of the fiber itself and increasing the production cost.

On the other hand, as a surface modification method by post-processing, for example, a method of attaching an aqueous dispersion of a polyester polyether block copolymer to a fiber (Japanese Patent Laid-Open No. 46-13 / 1976)
197) is known, but sufficient hygroscopicity cannot be obtained although sufficient hygroscopicity is exhibited. A method using a water-soluble heat-reactive urethane containing a polyethylene glycol chain and blocking an isocyanate group as a finishing agent for the purpose of imparting antistatic properties (Japanese Patent Publication No. 62-562).
No. 68) has also been proposed, but although the antistatic performance and the washing durability can be obtained, there are problems such as a decrease in color fastness and a hard texture.

Furthermore, Japanese Patent Publication No. 24950/1990 discloses a method in which fibers are treated with a polyester polyether block copolymer and then hard-finished with a liquid containing a hydrophilic polymer and a crosslinking agent for the hydrophilic polymer. However, there is a problem that the dyeing fastness is lowered and the product cannot be used for products requiring a soft texture.

[0007] As described above, all of the methods proposed so far have problems such as insufficient washing durability, deterioration of dyeing fastness and deterioration of texture, and the like. Development of an inexpensive post-processing method that satisfies all durability is strongly desired.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks of the prior art and to provide a durable antistatic polyester fiber without impairing the color fastness and texture. An object of the present invention is to provide a structure and a method of manufacturing the structure.

[0009]

Means for Solving the Problems The present inventors have conducted intensive studies to achieve the above object, and as a result, urethane containing a polyester polyether block copolymer and a polyethylene glycol chain is fixed to a polyester fiber structure. When using a creep accelerating compound further,
The present inventors have found that the antistatic washing durability can be remarkably improved without deteriorating the texture and the color fastness, and arrived at the present invention.

Thus, according to the present invention, there is provided a fibrous structure mainly composed of polyester fibers, wherein the fibrous structure includes (A) a polyester polyether block copolymer, and (B) a creep acceleration defined by the following formula. A creep accelerating compound having a coefficient of 4 or more and (C) a urethane containing a polyethylene glycol chain are contained and / or fixed in a ratio that simultaneously satisfies the following (A) to (D) with respect to the total weight of the fiber structure. An antistatic polyester fibrous structure is provided. (A) 0.001% by weight ≦ A (A) 0.001% by weight ≦ B ≦ 3% by weight (C) 0.05% by weight <A + C ≦ 7.5% by weight (D) 0.01% by weight ≦ C ≦ 5% by weight

[0011]

(Equation 3)

Here, Lc is a 120 denier / 36 filament, elongation 120-140% polyethylene terephthalate partially oriented yarn (manufactured by Teijin Limited, SD120 / 3).
6E900HYN (hereinafter referred to as POY) has a weight with a substantial weight of 50 g excluding buoyancy at 30 ° C.
Of POY after immersion in a creep accelerating compound maintained at a constant temperature for 4 hours.

La is the same as above, except that a weight of 50 g except for buoyancy is applied to the same POY, and the elongation percentage of the POY after being left in air at 30 ° C. for 4 hours is expressed by the length before leaving. It is a value calculated based on.

According to the present invention, when a fiber structure mainly composed of polyester fibers is treated with a polyester polyether block copolymer, a creep accelerating compound having a creep accelerating coefficient defined by the following formula of 4 or more is used in combination. Thereafter, a method for producing an antistatic polyester fiber structure is provided, wherein the method is treated with a water-soluble heat-reactive urethane containing a polyethylene glycol chain and blocking an isocyanate group, followed by heat treatment. You.

[0015]

(Equation 4)

Here, Lc is a 120 denier / 36 filament, elongation 120-140% polyethylene terephthalate partially oriented yarn (manufactured by Teijin Limited, SD120 / 3).
6E900HYN (hereinafter referred to as POY) has a weight with a substantial weight of 50 g excluding buoyancy at 30 ° C.
Of POY after immersion in a creep accelerating compound maintained at a constant temperature for 4 hours.

La is the same POY as above, except that a substantial weight excluding buoyancy is added to a weight of 50 g, and the elongation percentage of POY after being left in air at 30 ° C. for 4 hours is expressed by the length before leaving. It is a value calculated based on.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The polyester constituting the polyester fiber structure of the present invention consists essentially of polyethylene terephthalate, polytrimethylene terephthalate or polybutylene terephthalate, and may optionally contain a known third component. A polymerized polyester is used as appropriate. In addition, the above-mentioned polyester fibers are not restricted by the manufacturing method, and may be FOY (Fully Oriented Y) according to the purpose.
arn), POY (Ppartially Oriented Yarn), USY (Ul
Any fiber such as tra Speed Spinning Yarn) can be used. It is also possible to apply to a composite spun polyester fiber.

The shape of the fibrous structure may be cotton-like, thread-like, woven,
Any shape such as a knitted fabric or a nonwoven fabric can be adopted, and natural fibers such as rayon, regenerated fibers, and synthetic fibers other than polyester such as nylon and acrylic may be blended, blended, or cross-woven.

The polyester polyether block copolymer used in the present invention comprises terephthalic acid,
Isophthalic acid or an ester-forming derivative thereof, and / or a dicarboxylic acid component containing a sulfonic acid metal base such as dimethyl 5-sodium sulfoisophthalate in an amount of from 0 to 40 mol%, based on the total acid component; Aliphatic glycol components such as glycol, propylene glycol, butanediol, diethylene glycol, dipropylene glycol, and neopentyl glycol; and a molecular weight of 600 to 4 represented by the following general formula:
20 to 80% by weight, preferably 40 to 80% by weight of the polyethylene glycol component or its ester-forming derivative.
It is a copolymer containing 80% by weight.

[0021]

Embedded image

Here, R is hydrogen, an alkyl group, an aryl group, or a cycloalkyl group, and n is a positive integer determined by the molecular weight.

When the copolymer does not contain a dicarboxylic acid containing a sulfonic acid metal base, the concentration of the polyester polyether block copolymer in the aqueous solution is desirably 50% by weight or more. In addition, poor emulsification and dispersibility are difficult, and sufficient water absorption and antistatic properties cannot be obtained. Further, the sulfonic acid metal base-containing dicarboxylic acid is preferably present in an amount of 0 to 40 mol% with respect to all the acid components. If the content of the component is more than 40 mol%, the resin film becomes hard and brittle, and the water solubility is too high to lower the durability.

The creep accelerating compound used in the present invention is a compound that swells polyester fibers, and excludes a so-called carrier. The carrier as used herein refers to, for example, “Dyeing Notebook 22nd Edition” (Shikisensha) or “Textile Processing”, Vol. 13, No. 10 (1961), 957-
"On Carriers in Dyeing Polyester Fiber", written by Ken Mitsuishi on page 964, or "Fiber Processing", Vol. 11, No. 12 (1959), pp. 1188-1192, "Stain of Tetron by Carrier with Tetron" (Below) ”and the like.

More specifically, benzoic acid derivatives such as benzoic acid and benzoic acid esters, salicylic acid derivatives such as salicylic acid and salicylic acid esters, phenols such as phenol and m-cresol, and halogenated aromatics such as monochlorobenzene and trichlorobenzene. , Ketones such as acetophenone, halogenated phenols, phenylphenols such as orthophenylphenol, ethers such as anisole, di- and triphenylmethanes, diphenyl derivatives, naphthalenes such as methylnaphthalene and naphthol, and aniline And the like.

The creep accelerating compound used in the present invention must have a creep accelerating coefficient represented by the following formula of 4 or more.

[0027]

(Equation 5)

Here, Lc is a 120 denier / 36 filament, elongation of 120 to 140% polyethylene terephthalate partially oriented yarn (manufactured by Teijin Limited, SD120 / 3).
6E900HYN (hereinafter referred to as POY) has a weight with a substantial weight of 50 g excluding buoyancy at 30 ° C.
Of POY after immersion in a creep accelerating compound maintained at a constant temperature for 4 hours.

La is the same POY as above, except that a substantial weight excluding buoyancy is added to a weight of 50 g, and the elongation percentage of POY after being left in air at 30 ° C. for 4 hours is expressed by the length before leaving. It is a value calculated based on.

When the creep acceleration coefficient is less than 4, the effect of the present invention is not sufficiently exhibited.

Preferred examples of the creep accelerating compound used in the present invention include alkylene oxide derivatives represented by the following general formula (I).
Those having a value of 00 or less remarkably show the effect of the present invention.

[0032]

Embedded image

In the formula (I), R ₁ and R ₂ each independently represent an alkyl group having 1 to 8 carbon atoms, m is an integer of 0 to 2, and n is an integer of 2 to 10.

In the present invention, first, when a fiber structure composed of polyester fibers is treated with a polyester polyether block copolymer, the above-mentioned creep accelerating compound is used in combination, and the polyester polyether block copolymer and the creep accelerating compound are mixed. Contained in the fibrous structure and / or
Or it is important to fix them. Here, the combination means that the polyester polyether block copolymer and the creep accelerating compound coexist at a stage before the treatment of the polyester fiber with the polyester polyether block copolymer is completed. There is no restriction on the order of addition of the creep accelerating compound.

The treatment of the polyester fiber with the polyester polyether block copolymer refers to a method of converting a polyester fiber thread or a fibrous structure such as a woven fabric, a knitted fabric or a nonwoven fabric thereof into an aqueous solution containing the copolymer, an aqueous emulsion or the like. After immersion in organic solvent solution, heat treatment,
A conventionally known adhesion and / or impregnation dipping method such as adding the copolymer to a dye bath when dyeing a fibrous structure such as a polyester fiber yarn or a woven fabric, a knitted fabric, or a nonwoven fabric comprising the polyester fiber. In the spinning step, the drawing step, the false twisting and the fiber-mixing step with other fiber yarns, the mode of applying using a roller such as an oil agent applying roller, and further in the weaving preparation step, a roller such as a glued roller This also includes a mode in which the particles are adhered by using. Among them, simultaneous dyeing treatment in which the copolymer and the creep accelerating compound are added to a dyeing bath at the time of dyeing is preferable because the effect of improving durability is large.

At this time, the addition amount of the polyester polyether block copolymer is preferably from 0.1 to 20% owf, more preferably from 1 to 10% owf.

The amount of the creep accelerating compound to be added is 0.1.
1 to 10% owf is preferable, and more preferably 0.5 to 10% owf.
3% owf.

In the case of deep color dyeing with a disperse dye, reduction washing is usually performed after dyeing. In the present invention, there is no problem if the same reduction washing as in the prior art is performed.
The reduction washing may be performed under the condition of H12 or less. This is effective in preventing performance degradation due to hydrolysis of the polyester polyether block copolymer due to alkali.

Further, in the present invention, after the above-mentioned treatment, the mixture is treated with a water-soluble heat-reactive urethane containing a polyethylene glycol chain and blocking an isocyanate group, and further subjected to a heat treatment to carry out the water-soluble heat reaction. The mold urethane is contained and / or fixed to the fibrous structure.

The above-mentioned water-soluble heat-reactive urethane is used to prepare a urethane prepolymer having two or more free isocyanate groups by a polyaddition method of a compound containing two or more active hydrogen atoms and an excess amount of polyisocyanate. In addition, free isocyanate groups are blocked with an aqueous solution of bisulfite having an equivalent weight or more. At this time, if the content of polyethylene glycol (PEG) in the urethane compound is less than 10%, it is difficult to make water soluble, and if it is more than 40%, the water solubility becomes too high and the durability decreases, which is not preferable.

Examples of the compounds having two or more active hydrogens include ethylene oxide and propylenoxide.
Alkylene oxide, etc., a polymer composition and a random or block copolymer, or a polyether type such as a ring-opening polymer of an addition polymer ε-caprolactone to a polyhydric alcohol such as glycerin, succinic acid, adipic acid, phthalic acid, Polyester glycols of polyhydric carboxylic acids such as maleic anhydride or condensates thereof with polyhydric alcohols such as ethylene glycol, diethylene glycol, 1,4-butanediol, and glycerin; There is a polyetherester type copolymerized with an alkylene glycol.

As the above-mentioned polyisocyanates, aliphatic, alicyclic or araliphatic polyisocyanates are good in terms of yellowing and thermal stability of blocked products. For example, hexamethylene diisocyanate, xylene diisocyanate, 4,4'-dicyclohexylmethane diisocyanate, isophorone diisocyanate and the like can be mentioned.

Examples of the chain extender having an active hydrogen atom include glycols such as ethylene glycol and diethylene glycol, polyhydric alcohols such as glycerin and trimethylolpropane, diamines such as ethylenediamine and hexamethylenediamine, monoethanolamine and diethanolamine. Amino alcohols, thiodiglycols such as neodiethylene glycol, and water.

In the treatment with the water-soluble heat-reactive urethane, an aqueous solution containing the water-soluble heat-reactive urethane may be immersed or applied to the fiber structure by a padding method, a spray method, or a combination thereof. At that time, in order to increase the reactivity, stannous chloride, stannic chloride,
Organometallic catalysts such as tri-n-butyltin acetate, n-butyltin trichloride, dibutyltin laurate, and zinc acetate may be used.

For example, an aqueous solution containing 1 to 6% by weight of a water-soluble heat-reactive urethane containing a polyethylene glycol chain and blocking an isocyanate group was prepared at a pickup rate of 2%.
Pad with 0-100%, preferably 30-50%, 7
After drying at 0 to 120 ° C for 1 to 5 minutes,
180 ° C., preferably 160 to 180 ° C., for 30 seconds to 1
Heat treatment is performed for 0 minute, preferably 30 seconds to 1 minute, and if necessary, soaping is performed.

The fiber structure thus obtained contains (A)
A polyester polyether block copolymer, (B) a creep accelerating compound, and (C) a urethane containing a polyethylene glycol chain are contained in proportions that simultaneously satisfy the following (A) to (D) with respect to the total weight of the fiber structure. It is important that they are fixed and / or fixed. (A) 0.001% by weight ≦ A (A) 0.001% by weight ≦ B ≦ 3% by weight (C) 0.05% by weight <A + C ≦ 7.5% by weight (D) 0.01% by weight ≦ C ≦ 5% by weight

The content and / or the amount of the polyester-polyether block copolymer (A), the creep accelerating compound (B) and the water-soluble heat-reactive urethane (C) are 0.0
When the content is less than 01% by weight, the antistatic effect is impaired. on the other hand,
When the content and / or the amount of fixation exceed the above range, no effect of improving the antistatic property is obtained, and the texture and the color fastness are impaired.

[0048]

In the present invention, in the process of imparting antistatic properties using a polyester polyether block copolymer and a water-soluble heat-reactive urethane, a small amount of a processing agent is used to reduce the antistatic properties by using a creep accelerating compound in combination. And the washing durability can be remarkably improved. Although the reason is not clear, it is presumed that the action of the creep accelerating compound causes the polyester polyether block copolymer to be particularly firmly fixed to the surface of the polyester fiber structure.

[0049]

The present invention will be described below in detail with reference to examples. In addition, the physical property in an Example was measured by the following method.

(1) Creep acceleration factor: 120 denier / 36 filaments, elongation: 120 to 14
0% polyethylene terephthalate partially oriented yarn (manufactured by Teijin Limited, SD120 / 36E900HYN) was attached to one end with a weight having a substantial weight of 50 g excluding buoyancy.
The elongation percentage of POY after immersion in a creep accelerating compound kept at a constant temperature of 0 ° C. for 4 hours is calculated based on the length before immersion, and this is defined as Lc (%).

The same POY as described above was weighted with a substantial weight excluding buoyancy of 50 g, and the elongation percentage of POY after being left in air at 30 ° C. for 4 hours was calculated based on the length before being left. And this is La. The creep acceleration coefficient is calculated by the following equation.

[0052]

(Equation 6)

(2) Friction band voltage Measured according to JIS L1094 B method (5.2).

(3) Washing Washing according to JIS L0217 103 method is performed 10 times.

(4) Color fastness Attached cloth (nylon) is attached to the sample, and an aluminum plate is sandwiched from both sides. Further, a load is applied so that the pressing force becomes 3924 Pa, and the transfer dyeing fastness after leaving for 1 week in an atmosphere of 60 ° C. × 95% RH is evaluated.

(5) Content and / or Fixing Amount of Polyester Polyether Block Copolymer, Creep Accelerating Compound and Water-Soluble Heat-Responsive Urethane Polyester contained and / or fixed in a fiber structure using hexafluoroisopropanol After dissolving the ether block copolymer (A) and the creep accelerating compound (B) to separate the water-soluble heat-reactive urethane (C), the amounts of (A) and (B) are measured by NMR (Nuclear Magnet).
tic Resonance, manufactured by JEOL Ltd., JEOL A-600 (600 MHz)), and the amount of (C) was measured using solid-state NMR (Solid-state Hi
gh Resolution Nuclear Magnetic Resonance, manufactured by BRUKER, DSX300WB).

(6) Texture The sensory evaluation was carried out by a skilled person, and the hardness of the texture was determined by ○ (good) and × (poor).

Example 1 55 dtex / 2 as warp
4-filament semi-dal FOY yarn, 83d as weft yarn
tex / 36 filament semi-dal FOY yarn,
55g / m ^TwoWeaved taffeta.

The woven fabric was subjected to creep accelerating compound polyethylene glycol dimethyl ether (molecular weight = 50).
0, creep acceleration coefficient = 5.2) and a polyethylene glycol / polyethylene terephthalate / polyethylene isophthalate block copolymer with one end blocked (molecular weight 10,000,
It was treated with a processing fluid used in combination with a hydrophilic processing agent (SR-1000, manufactured by Takamatsu Yushi Co., Ltd.).

As a treatment method, using a mini-color dyeing machine, 5 g of a woven fabric was mixed with 0.15 g (3% owf) of polyethylene glycol dimethyl ether and the polyethylene glycol / polyethylene terephthalate / polyethylene isophthalate block having one end-blocked polyethylene glycol. The polymer was placed in 200 g of an aqueous processing agent solution containing 0.025 g (0.5% owf) and treated at 130 ° C. for 30 minutes, and then 2 g
/ L sodium hydroxide, 2 g / l sodium hydrosulfide and 2 g / l score roll (Kao No. 400) in water at 80 ° C for 15 minutes, followed by hot water washing and air drying.

Next, a water-soluble heat-reactive urethane (TS-897, manufactured by Takamatsu Oil & Fats Co., Ltd.) containing a polyethylene glycol chain and blocking an isocyanate group was added to the woven fabric.
After a processing solution containing 0.04% by weight of zinc acetate and 0.04% by weight of the solution was padded at a pickup rate of 80%, the solution was dried at 100 ° C. for 3 minutes and subjected to a dry heat treatment at 160 ° C. for 1 minute.

The friction band voltage of the obtained fabric (initial and 1
Table 1 shows the dyeing fastness, the content and / or fixing amount of the polyester polyether block copolymer, the creep accelerating compound and the water-soluble heat-reactive urethane, and the hand.

Comparative Example 1 The procedure of Example 1 was repeated except that polyethylene glycol dimethyl ether was not used.

The friction band voltage of the obtained fabric (initial and 1
Table 1 shows the dyeing fastness, the content and / or fixing amount of the polyester polyether block copolymer, the creep accelerating compound and the water-soluble heat-reactive urethane, and the hand.

Comparative Example 2 The same operation as in Example 1 was performed except that polyethylene glycol monomethyl ether (molecular weight = 500, creep acceleration coefficient = 2.5) was used instead of polyethylene glycol dimethyl ether. .

The resulting fabrics had a triboelectric voltage (initial and 1).
Table 1 shows the dyeing fastness, the content and / or fixing amount of the polyester polyether block copolymer, the creep accelerating compound and the water-soluble heat-reactive urethane, and the hand.

[Comparative Example 3] The same operation as in Example 1 was carried out except that a water-soluble heat-reactive urethane containing a polyethylene glycol chain and blocking an isocyanate group was not used.

The friction band voltage (initial and 1
Table 1 shows the dyeing fastness, the content and / or fixing amount of the polyester polyether block copolymer, the creep accelerating compound and the water-soluble heat-reactive urethane, and the hand.

[Comparative Example 4] The same operation as in Example 1 was carried out except that the polyester polyether block copolymer was not used.

The friction band voltage of the obtained woven fabric (initial and 1
Table 1 shows the dyeing fastness, the content and / or fixing amount of the polyester polyether block copolymer, the creep accelerating compound and the water-soluble heat-reactive urethane, and the hand.

Comparative Example 5 In Example 1, a water-soluble heat-reactive urethane containing a polyethylene glycol chain and blocking an isocyanate group (TS-89, manufactured by Takamatsu Oil & Fats Co., Ltd.)
7) was carried out in the same manner as in Example 1 except that a treatment liquid containing 10% by weight of zinc acetate and 0.08% by weight of zinc acetate was padded at a pickup rate of 100%.

The friction band voltage (initial and 1
Table 1 shows the dyeing fastness, the content and / or fixing amount of the polyester polyether block copolymer, the creep accelerating compound and the water-soluble heat-reactive urethane, and the hand.

[0073]

[Table 1]

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shigeru Takahashi 3-4-1, Amihara, Ibaraki-shi, Osaka Teijin Limited Osaka Research Center F-term (reference) 4L033 AA07 AC06 BA14 CA48 CA51

Claims (7)

[Claims] 1. A fiber structure mainly composed of polyester fibers, wherein the fiber structure has (A) a polyester polyether block copolymer, and (B) a creep acceleration coefficient defined by the following formula of 4 or more. A certain creep accelerating compound and (C) a urethane containing a polyethylene glycol chain are represented by the following (A) to (D) based on the total weight of the fiber structure.
Is contained and / or fixed in a ratio that simultaneously satisfies the following. (A) 0.001% by weight ≦ A (A) 0.001% by weight ≦ B ≦ 3% by weight (C) 0.05% by weight <A + C ≦ 7.5% by weight (D) 0.01% by weight ≦ C ≦ 5% by weight Here, Lc is 120 denier / 36 filament,
Polyethylene terephthalate partially oriented yarn having an elongation of 120 to 140% (manufactured by Teijin Limited, SD120 / 36E900H)
YN (hereinafter referred to as POY) has a weight with a substantial weight of 50 g excluding buoyancy at one end, and is immersed in a creep accelerating compound kept at a constant temperature of 30 ° C. for 4 hours.
It is a value obtained by calculating the elongation percentage of Y based on the length before immersion. La has the same POY as above with a weight of 50 g excluding buoyancy and a weight of 4 g in air at 30 ° C.
The elongation percentage of POY after standing for a time is a value calculated based on the length before standing. 2. The antistatic polyester fiber structure according to claim 1, wherein the creep accelerating compound is an alkylene oxide derivative represented by the following general formula (I). Embedded image In the formula (I), R ₁ and R ₂ each independently have 1 to 1 carbon atoms.
8 represents an alkyl group, m is an integer of 0 to 2 and n is 2 to 1
It is an integer of 0. 3. The polyester polyether block copolymer is mainly composed of terephthalic acid and / or isophthalic acid or an ester-forming derivative thereof, and a polyether, and the polyether has a molecular weight of 60.
The antistatic property according to claim 1 or 2, which is 0 to 4000 polyethylene glycol and / or a monoester-forming derivative thereof, and wherein the polyether accounts for 20 to 80% by weight of the total weight of the polyester polyether block copolymer. Polyester fiber structure. 4. When a fiber structure mainly composed of polyester fibers is treated with a polyester polyether block copolymer, a creep accelerating compound having a creep accelerating coefficient defined by the following formula of 4 or more is used in combination. A method for producing an antistatic polyester fiber structure, comprising treating with a water-soluble heat-reactive urethane containing a chain and blocking an isocyanate group, and further performing a heat treatment. (Equation 2) Here, Lc is 120 denier / 36 filament,
Polyethylene terephthalate partially oriented yarn having an elongation of 120 to 140% (manufactured by Teijin Limited, SD120 / 36E900H)
YN (hereinafter referred to as POY) has a weight with a substantial weight of 50 g excluding buoyancy at one end, and is immersed in a creep accelerating compound kept at a constant temperature of 30 ° C. for 4 hours.
It is a value obtained by calculating the elongation percentage of Y based on the length before immersion. La has the same POY as above with a weight of 50 g excluding buoyancy and a weight of 4 g in air at 30 ° C.
The elongation percentage of POY after standing for a time is a value calculated based on the length before standing. 5. The method for producing an antistatic polyester fiber structure according to claim 4, wherein the creep accelerating compound is an alkylene oxide derivative represented by the following general formula (I). Embedded image In the formula (I), R ₁ and R ₂ each independently have 1 to 1 carbon atoms.
8 represents an alkyl group, m is an integer of 0 to 2 and n is 2 to 1
It is an integer of 0. 6. The polyester polyether block copolymer is mainly composed of terephthalic acid and / or isophthalic acid or an ester-forming derivative thereof and a polyether, and the polyether has a molecular weight of 60.
The antistatic property according to claim 4 or 5, which is 0 to 4000 polyethylene glycol and / or a monoester-forming derivative thereof, and wherein the polyether accounts for 20 to 80% by weight of the total weight of the polyester polyether block copolymer. A method for producing a polyester fiber structure. 7. The method according to claim 4, wherein the polyethylene glycol chain in the water-soluble heat-reactive urethane has a molecular weight of 400 to 4000 and accounts for 10 to 40% by weight of the total weight of the water-soluble heat-reactive urethane. A method for producing an electrically conductive polyester fiber structure.