JPH07173725A - Antistatic polyester fiber - Google Patents

Abstract

PURPOSE:To provide an antistatic polyester fiber having excellent antistaticity excellent in washing durability even when subjected to a high alkali weight deduction processing, and excellent in luminous dyeability, operation stability and quality stability. CONSTITUTION:An antistatic polyester fiber comprises a polyester matrix containing 0.1-2wt.%, preferably 0.2-1wt.%, of an organic metal salt and 0.5-5wt.%, preferably 2-2.5wt.%, of a polyoxyalkylene glycol (derivative) containing >=10wt.%, preferably 20wt.%, of a polyether-modified polysiloxane of the formula (Si is polysiloxane residue; X1, X2 are polyoxyalkyleneglycol residue; R is H, 1-40C hydrocarbon group, 2-40C acyl). In the fiber, the polyoxyalkylene glycol (derivative) is dispersed as an independent island component in the arbitrary cross section of the fiber, while having a continuous fibrous shape in the axial direction of the fiber, and the size of the largest one of the island component in the cross-sectional direction is preferably 50-300nm.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antistatic polyester fiber, and more particularly, it has a high antistatic property with improved washing durability when subjected to a high alkali weight reduction process and has a visual infection color. The present invention relates to an antistatic polyester fiber excellent in stability, operation stability, and quality stability.

[0002]

Polyester is widely used as a synthetic fiber because of its many excellent properties. However, since polyester fibers are more hydrophobic than natural fibers such as wool and silk, fibrous fibers such as rayon and acetate, acrylic fibers, etc., static electricity easily occurs,
There are drawbacks such as dust adhesion and garment clinging due to static electricity.

In order to improve such drawbacks, a method of blending polyester fiber with an antistatic agent such as polyoxyalkylene glycol or an organic or inorganic ionic compound (for example, JP-B-44-31828 and JP-B-60-11).
944, JP-A-53-80497, JP-A-60-39413, etc.) are known.

However, in order to obtain the antistatic fiber by the conventional melt spinning by incorporating the above-mentioned antistatic agent in polyester, it is necessary to add a large amount of antistatic agent, and therefore polyester fiber is required. There are drawbacks that impair the original excellent properties.

In order to improve such drawbacks, Japanese Patent Laid-Open No. 3-1
No. 24760 discloses an antistatic agent composed of polyoxyalkylene glycol and an alkali metal sulfonic acid.
Disclosed is an antistatic polyester composition containing an organosilicon compound having a siloxane bond and having a viscosity at 10 ° C. of 10 to 10,000 centistokes, preferably 350 to 550 centistokes.

However, in this method, since the organosilicon compound to be blended has a low viscosity, the antistatic agent is likely to be concentrated and present in the place where the antistatic agent is present, and a large amount of antistatic agent is still required to obtain good antistatic property. Electrical agent is required.

Therefore, when the mechanical properties, light resistance, whiteness and heat-resistant yellowing of the obtained fiber are deteriorated, or when the alkali weight reduction treatment which is generally carried out for improving the feel of the polyester fiber is applied, In the subsequent dyeing process, the antistatic property is easily lost, and the visual infection color property is deteriorated.

Further, there is a problem that a portion which has been subjected to pressure before the weight reduction process is fibrillated during the weight reduction process and looks white when dyed (hereinafter referred to as a pressure loss whitening phenomenon).

[0009]

DISCLOSURE OF THE INVENTION The present invention overcomes the problems of the above-mentioned prior art, has improved antistatic durability, and has a passability in post-processing steps such as alkali weight loss and dyeing. It is an object of the present invention to provide an antistatic polyester fiber which is excellent in visual infection colorability, operation stability and quality stability.

[0010]

Means for Solving the Problems As a result of intensive studies for achieving the above object, the present inventors have found that when polyoxyalkylene glycol or its derivative is mixed with polyester, one of the polyoxyalkylene glycol or its derivative is mixed. It was clarified that when a polyether-modified polysiloxane was used as a component, a polyester fiber having significantly improved antistatic property was obtained.

Thus, according to the present invention, a polyester fiber containing 0.5 to 5% by weight of polyoxyalkylene glycol or a derivative thereof and 0.1 to 2% by weight of an organic metal salt in a polyester matrix is provided. An antistatic polyester fiber is provided in which the polyoxyalkylene glycol or its derivative contains a polyether-modified polysiloxane represented by the following general formula.

[0012]

[Chemical 3]

In the formula, Si is a polysiloxane residue, X ₁ , X
₂ represents a polyoxyalkylene glycol residue, R represents a hydrogen atom, a monovalent hydrocarbon group having 1 to 40 carbon atoms, or a monovalent acyl group having 2 to 40 carbon atoms.

The constituent features of the present invention will be described in detail below. The polyester used in the present invention is an aromatic polyester having an aromatic ring in a polymer chain unit, and is obtained by reacting a difunctional aromatic carboxylic acid or its ester-forming derivative with a glycol or its ester-forming derivative. Is a polymer.

Examples of the bifunctional aromatic carboxylic acid used herein include terephthalic acid, isophthalic acid, and 2,6-naphthalenedicarboxylic acid, with terephthalic acid being particularly preferred. These difunctional aromatic carboxylic acids have 2
You may use together 1 or more types. It should be noted that 5-sodium sulfoisophthalic acid or the like can be used alone or in combination of two or more kinds together with these bifunctional aromatic carboxylic acids as long as the amount is small.

As the glycol, an aliphatic glycol such as ethylene glycol or butylene glycol,
Preferred examples include alicyclic glycols, aromatic diols, and mixtures thereof. Also, if the amount is small, polyoxyalkylene glycol having both ends or one end unblocked can be copolymerized with these glycols.

Examples of preferable aromatic polyesters include polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, and copolymerized polyesters such as polyethylene isophthalate / terephthalate. Among them, polyethylene terephthalate and polybutylene terephthalate, which have well-balanced mechanical properties and moldability, are particularly preferable.

The aromatic polyester can be synthesized by any method. For example, polyethylene terephthalate can be described by directly reacting terephthalic acid with ethylene glycol, transesterifying a lower alkyl ester of terephthalic acid such as dimethyl terephthalate with ethylene glycol, or reacting terephthalic acid with ethylene oxide. In other words, the first step of producing a glycol ester of terephthalic acid and / or its low polymer, and then the second step of heating the product under reduced pressure to carry out a polycondensation reaction until a desired degree of polymerization is obtained. It is easily produced by the reaction.

The above polyester may contain other thermoplastic polymers such as polyamides such as nylon 6 and polyolefins such as polyethylene and polystyrene within a range that does not impair the original physical properties of the polyester.

Further, a hindered phenol-based, sulfide-based or phosphite-based antioxidant or a benzophenone-based or benzotriazole-based UV absorber may be added to the polyester. For example, when an antioxidant is added, it is possible to suppress a decrease in antistatic property due to thermal decomposition of polyoxyalkylene glycol or a derivative thereof due to retention in the melt spinning step.

The above antioxidants may be used alone or in combination of two or more, and the compounding amount is 0.02 to 1% by weight based on the aromatic polyester. preferable.

In addition, if necessary, the polyester may include a flame retardant, a fluorescent whitening agent, a matting agent such as titanium oxide, a colorant, colloidal silica, dry process silica, colloidal alumina, particulate alumina, and calcium carbonate. Inactive fine particles such as calcium phosphate and other optional additives may be added separately or premixed at any stage from the start of polyester synthesis to the spinning step.

The intrinsic viscosity [η] of the polyester is 0.
It is preferably 55 or more. If [η] is less than 0.55, the elongational viscosity after leaving the spinneret is too small,
The alkylene oxide chain in the polyalkylene glycol or its derivative is difficult to take a streak dispersion form of a sufficient length in the polyester fiber, resulting in insufficient antistatic performance, crystallization due to heat easily, and toughness Since it tends to be inferior and brittle, abrasion resistance becomes insufficient.

In the present invention, the aromatic polyester contains a polyoxyalkylene glycol or a derivative thereof which is substantially non-reactive with the aromatic polyester. The term “substantially non-reactive” as used herein means that the polyester is not copolymerized.

The content of polyoxyalkylene glycol or a derivative thereof in the polyester matrix must be 0.5 to 5% by weight, and the content is 2 to 2.5.
Weight percent is particularly preferred.

When the content is less than 0.5%, sufficient antistatic property cannot be obtained. On the other hand, when the content exceeds 5% by weight, the antistatic property is improved, but the mechanical properties of the obtained polyester fiber are improved. Properties, such as light resistance, are impaired, and pressure reduction and whitening reduction are remarkable.

In the present invention, it is necessary to use a polyether-modified polysiloxane represented by the following general formula as one component of polyoxyalkylene glycol or its derivative.

[0028]

[Chemical 4]

In the formula, Si is a polysiloxane residue, X ₁ , X
₂ represents a polyoxyalkylene glycol residue, R represents a hydrogen atom, a monovalent hydrocarbon group having 1 to 40 carbon atoms, or a monovalent acyl group having 2 to 40 carbon atoms.

Of the above polyether-modified polysiloxane,
The weight ratio with respect to the total amount of polyoxyalkylene glycol or its derivative is preferably 10% or more, more preferably 20% or more.

When the weight ratio is less than 10%, the dispersion state of the polyoxyalkylene glycol or its derivative in the polyester fiber cannot be changed,
The effect of improving anti-static durability is small.

On the other hand, the upper limit of the weight ratio of the polyether-modified polysiloxane to the total amount of polyoxyalkylene glycol or its derivative depends on the total molecular weight of polyoxyalkylene glycol residues (X ₁ , X ₂ ) described later. However, 90% or less is preferable.

If the average molecular weight of the above polyether-modified polysiloxane is too small, aggregation of polyoxyalkylene glycol or its derivative in the polyester fiber will be less likely to occur, and antistatic durability will be poor. When it has one, it is preferably 3,000 or more, and when both ends are not hydroxyl groups, it is preferably 1,000 or more, more preferably 2,000 or more.

The ratio of the total molecular weight of the polyoxyalkylene glycol residues (X ₁ , X ₂ ) to the average molecular weight of the above polyether-modified polysiloxane is 0.1 to 10.
0.8 is preferred.

When the ratio is less than 0.1, it becomes substantially the same as that of polysiloxane, and the effect of improving the antistatic property becomes small. On the other hand, when the ratio is larger than 0.8, it becomes substantially the same as polyether, and the effect of improving antistatic durability becomes small.

Further, the content of the polyether-modified polysiloxane in the polyester matrix is 0.1-0.1%.
It is necessary to be 4% by weight, more preferably 1 to 2% by weight.

When the content is less than 0.1% by weight, the effect of improving the antistatic durability becomes small, while when it exceeds 4% by weight, the whiteness and pressure-reducing whitening property of the obtained fiber deteriorate.

On the other hand, as the polyoxyalkylene glycol or its derivative other than the polyether-modified polysiloxane to be blended with the polyester, any of those which have been conventionally proposed to be mixed with a thermoplastic resin to impart antistatic property is used. It can be used, for example, JP-B-39-52
Examples include those described in Japanese Patent Publication No. 14 and Japanese Patent Publication No. 57-4724.

If the average molecular weight of the polyoxyalkylene glycol or its derivative is too small, it is difficult to form a streaky dispersion form having a sufficient length in the polyester fiber, and conversely if it is too large, the melt miscibility in the polyester is deteriorated. Then, the dispersion becomes non-uniform and the antistatic property becomes poor. Therefore, when the terminal has a hydroxyl group, it is preferably 3,000 to 25,000, and when the terminal is not a hydroxyl group, it is preferably 3,000 to 16,000.

A more preferable polyoxyalkylene glycol derivative is a non-random copolymer type polyoxyethylene-based polyether represented by the following general formula and having an average molecular weight of 5,000 to 16,000.

Since the polyoxyethylene-based polyether is insoluble in water, it has excellent durability against alkali weight loss, dyeing or washing.

[0042]

[Chemical 5]

Z is a molecular weight 3 having 1 to 6 active hydrogens.
00 or less organic compound residue, R ₁ is an unsubstituted or substituted alkylene group having 6 or more carbon atoms, R ₂ is a hydrogen atom, a monovalent hydrocarbon having 1 to 40 carbon atoms or 2 to 40 carbon atoms
Monovalent acyl group, k is an integer of 1 to 6, and n is k × n is 7
An integer of 0 or more and m is an integer of 1 or more.

The content of the polyoxyalkylene glycol or its derivative other than the polyether-modified polysiloxane is preferably 0.4 to 4% by weight, particularly preferably 1 to 2% by weight, based on the aromatic polyester.

If the amount is less than 0.4% by weight, sufficient antistatic property cannot be obtained. On the other hand, if the amount exceeds 4% by weight, the antistatic property is improved, but the mechanical properties and light resistance of the obtained polyester fiber are improved. The property is deteriorated, and when the alkali is reduced, the pressure reduction and the whitening reduction become remarkable.

The polyoxyalkylene glycol or derivative thereof other than the polyether-modified polysiloxane is 2
You may use together 1 or more types.

In the present invention, an organic metal salt is added in combination with the polyoxyalkylene glycol or its derivative.

The organic metal salt preferably used is
Alkali metal salt of sulfonic acid formed from sulfonic acid such as dodecylbenzene sulfonic acid and tridecylbenzene sulfonic acid and alkali metal such as sodium, potassium and lithium, and alkali metal of phosphoric acid ester such as distearyl sodium phosphate Examples thereof include salts, alkali metal salts of other organic carboxylic acids, and sulfonic acid metal salts represented by the following general formula (A).

[0049]

[Chemical 6]

In the formula, R'is a monovalent hydrocarbon group, R "is an alkylene group having 2 to 4 carbon atoms, a is an integer of 1 to 100, b is an integer of 2 to 4, M is Na and K. , Li, etc. are shown.

Among them, sodium dodecylbenzenesulfonate, a mixture of sodium alkylsulfonates having an average number of carbon atoms of 14 or metal salts of sulfonic acids represented by the following formulas (B) and (C) are preferable.

[0052]

[Chemical 7]

[0053]

[Chemical 8]

The amount of the organic metal salt compounded must be 0.1 to 2% by weight based on the aromatic polyester.
0.2-1% by weight is particularly preferred. When it is less than 0.1% by weight, sufficient antistatic property cannot be imparted, while
The whiteness of the fiber obtained by blending more than 2% by weight,
The dyeability is poor. These organometallic salts are preferably mixed in advance with polyalkylene glycol or its derivative.

The antistatic polyester fiber of the present invention comprises a polyalkylene glycol containing the above polyether-modified polysiloxane or a derivative thereof and an organic metal salt, and if necessary, an antioxidant and the like from the start of the polyester polycondensation reaction. It can be produced by spinning polyesters added separately or premixed at any time up to the spinning step using a conventionally known spinning device.

In the polyester fiber thus obtained, the polyalkylene glycol or its derivative is
Polyester fibers are dispersed as independent island components in any fiber cross section of the fiber while having a continuous linear shape in the fiber axis direction, and the fiber cross section direction of the largest island component among the island components is Is preferably 50 to 300 nm.

Here, having a continuous streak form in the direction of the fiber axis means that when the amount of the above fiber is reduced by 20% and the side surface of the fiber is observed by a scanning electron microscope, the streak-like groove is a fiber. It means a continuous state without interruption in the axial direction, and may include a form in which adjacent grooves are partially overlapped and continuous.

The term “dispersed as an independent island component in any fiber cross section” means that the polyalkylene glycol or its derivative is dispersed randomly in the fiber while having a length in the fiber axis direction. That is, the dispersion can be identified as an island component when viewed from an arbitrary fiber cross section.

The size of the island component in the cross-sectional direction of the fiber is the diameter of the circumscribing circle when the island is substantially circular or polygonal.
When it is substantially elliptical, it is a value represented by the length of its long axis. If the size of the largest island component is less than 50 nm, the antistatic property becomes insufficient, while if it exceeds 300 nm, the antistatic property is good, but the whiteness and light resistance of the fiber deteriorate,
Pressure reduction Whitening reduction is remarkable.

The uneven distribution of polysiloxane in the polyester and the formation of large islands make the dispersion of the polyalkylene glycol or its derivative non-uniform,
Since the antistatic property and mechanical properties of the resulting fiber are deteriorated, it is also preferable to add a polysiloxane and then use a static mixer such as a static mixer together to improve the kneading effect.

The denier of the spun yarn is not particularly limited,
Generally, about 0.1 de to several de is suitable. Also,
The spinning speed is not particularly limited, and the drawing and false twisting may be performed subsequent to the spinning. For example, 500-3,500m
Melt spinning at a speed of 1 / min, stretching and heat treatment, 1,
Melt spinning at a speed of 500 to 5,000 m / min, stretching,
Method for performing false twisting simultaneously or subsequently 5000 m
It is possible to employ a method in which melt spinning is performed at a high speed of not less than 1 minute / minute, and the drawing step is omitted depending on the application.

The cross-sectional shape of the antistatic polyester fiber of the present invention can be any shape depending on the intended use of the woven or knitted product, and in addition to circular shape, triangular shape, flat shape, star shape, V shape, etc. Atypical cross sections or hollow sections thereof can be exemplified.

The obtained fiber or the woven or knitted fabric produced from this fiber may be subjected to an appropriate post-hydrophilization treatment. As the post-hydrophilization treatment, for example, a method of treating with an aqueous dispersion of a polyether ester block copolymer composed of terephthalic acid and / or isophthalic acid or a lower alkyl ester thereof and a lower alkylene glycol and a polyalkylene glycol, or acrylic A preferable method is, for example, a method in which a hydrophilic monomer such as acid or methacrylic acid is graft-polymerized and then this is subjected to sodium chloride.

[0064]

The antistatic polyester fiber of the present invention contains polyoxyalkylene glycol or its derivative and an organometallic salt, and further contains polyether-modified polysiloxane as one component of polyoxyalkylene glycol or its derivative. It has durability and sufficient anti-static performance.

Although the details of the reason are unknown,
By adding the polyether modified polysiloxane containing a polyoxyalkylene glycol residue to the polyester, the compatibility of the polyoxyalkylene glycol or its derivative with the polyester is enhanced, and as a result, the polyoxyalkylene glycol or its derivative is introduced into the fiber. Dispersed uniformly, the polyoxyalkylene component in the polyoxyalkylene glycol or a derivative thereof easily takes a streak form having a sufficient length in the polyester matrix, and part of the polyoxyalkylene glycol or a derivative thereof, It is presumed that this is because it is dispersed in the fiber as an extremely large island component and the ion conduction effect of the polyoxyalkylene component is further enhanced.

[0066]

EXAMPLES The present invention will be described in more detail below with reference to examples. The parts and% in the comparative examples are parts by weight and% by weight, respectively. The frictional electrification voltage of the obtained antistatic polyester cloth, the visual infection color, and the dispersion state of polyoxyalkylene glycol or its derivative were measured by the following methods.

(1) Friction electrification voltage Alkaline weight loss rate (referred to as N rate) 0% and 15% (referred to as N ₀ and N ₁₅ respectively) dyed fabric (referred to as L ₀ ) and JIS L-1018-77 6 .36
A test piece is a dyed woven fabric that has been washed for 50 times in accordance with the H method (referred to as L ₅₀ ) and left to stand in a desiccator at 20 ± 2 ° C. and 40 ± 2% RH for one day or more as a test piece. Using a rotary static tester in a room with an atmosphere of 20 ± 2 ° C. and 40 ± 2% RH, JIS L-
Friction electrification voltage was measured according to the 1094 8.2 B method. If the frictional charge voltage is 1.5 kV or less, the antistatic effect is judged to be sufficient.

(2) Visual infection color The cylindrical knitted fabric is scoured and preset (180 ° C x 1
Min) obtained was knitted A _0, and the knitted fabric A ₀ with aqueous sodium hydroxide solution of 30 g / l, the knitted fabric B ₀ where the N ratio of 15% and caustic at boiling temperature, Sumikalon
Navy Blue S-2GL (Sumitomo Chemical) 4%
owf, Disper VG (manufactured by Meisei Chemical Co., Ltd.) 0.5g /
1 and a bath ratio of 1:50 in a dyebath containing 0.3 g / l acetic acid
After dyeing at 130 ℃ for 60 minutes, 1g of sodium hydroxide
/ L and 1 g / l of hydrosulfite were reduced and washed at 70 ° C for 20 minutes, and then subjected to final set (160 ° C x 1 minute) by a conventional method to give a dyed knitted fabric A.
(N ratio 0%) and weight loss dyed knitted fabric B (N ratio 15%) were obtained.

Next, the L * value (brightness index) of each dyed knitted fabric was calculated using Macbeth MS-2020 (Instrument).
ntal Color System Limited
Manufactured). As the L * value is smaller, the luminous density is higher and the visual infection color is more excellent.

(3) Dispersion state of polyoxyalkylene glycol or its derivative: Continuity of the groove line in the fiber axis direction was determined by reducing the amount of alkali in the dyed woven fabric by 20%, and observing the side surface of the fiber in the woven fabric with a scanning electron microscope. It was observed and evaluated according to the criteria in Table 1.

[0071]

[Table 1]

The size of the largest island component in the fiber cross section was 1% with the 1% osmium tetroxide solution of the weight-reduced fabric.
The sections were stained for 4 days, embedded in epoxy resin, and cut into 5 μm-thick sections, which were further stained with osmium tetroxide vapor for 30 minutes, and then 40,000 using a transmission electron microscope.
It was measured from a photograph taken at double magnification. The size of the island component is represented by the diameter of the circumscribing circle when the island is substantially circular or polygonal, and the length of the major axis when the island is substantially elliptical.

[Example 1] Dimethyl terephthalate 100
Parts, 60 parts of ethylene glycol, 0.06 parts of calcium acetate monohydrate (0.066 parts to dimethyl terephthalate)
(Mol%) was charged into a transesterification can, and the transesterification reaction was performed while distilling off the methanol produced by raising the temperature from 140 ° C. to 220 ° C. over 4 hours in a nitrogen gas atmosphere outside the system.

After the transesterification reaction, trimethyl phosphate O. 58 parts of O (0.080 mol% relative to dimethyl terephthalate) and 0.024 part of dimethylpolysiloxane as a defoaming agent were added. Then, 10 minutes later, 0.04 part of antimony trioxide (0.027 mol% with respect to dimethyl terephthalate) was added, and at the same time, the temperature was raised to 240 ° C. while driving out excess ethylene glycol, and then transferred to a polymerization vessel. did.

Next, from 760 mmHg to 1 over 1 hour
Reduce the pressure to mmHg, and simultaneously over 1 hour and 30 minutes 240
The temperature was raised from ℃ to 280 ℃.

Two hours after the start of depressurization, it is represented by the following formula:
1.0 part of non-random type polyoxyethylene-based polyether (referred to as P-1) having an average molecular weight of 7100, and polyether-modified silicone (KF manufactured by Shin-Etsu Chemical Co., Ltd.)
-6004, referred to as P-2) 1.0 part in a molten state,
In addition, sodium dodecylbenzene sulfonate (ABS
0.5 parts by weight) was made into a 50% ethylene glycol solution and added under reduced pressure.

[0077]

[Chemical 9]

However, j is an integer of 18 to 28 and averages 21,
The average value of p is about 115, and the average value of m is 3.

Subsequently, when the polymerization was carried out for 1 hour under a reduced pressure of 1 mmHg or less, Syanox 1 as an antioxidant was used.
790 (manufactured by American Cyanamid) and 0.15 part of Mark AO-412S (manufactured by ADEKA ARGUS CHEMICAL CO., LTD.) Were added under reduced pressure, and then the mixture was further polymerized for 20 minutes. Chiped by the method.

The intrinsic viscosity of the obtained polyester is 0.6.
4, the melting point obtained from the melting peak temperature of the differential thermal measurement is 25
It was 5 ° C.

The obtained polyester chips were dried by a conventional method and then melted at a melting temperature of 295 ° C. by a screw type extruder, and then fed to a spinning head through a gear pump to form a triangular sectional hole having a nozzle sectional area of 0.19 mm ^2. It was discharged from 24 spinnerets.

The yarn having a length of 9 was set just below the spinneret.
cm heat-insulating zone, below which temperature 20 ° C,
After cooling with sideways cooling by blowing cooling air with a wind speed of 0.3 m / sec and applying an oil agent, a 90 ° C. heating goded roller set at a speed of 3000 m / min and 5000 m / sec.
It was wound up through a drawing heating roller of 120 ° C. set to a speed of minute to obtain a drawn yarn of 30 de / 24 filament.

The drawn yarn thus obtained was formed into a tubular knitted fabric and a plain weave, and the frictional electrification voltage of the knitted fabric, the visual infection color property, and the
And the dispersion state of the polyoxyethylene-based polyether was measured. The results are shown in Table 3.

[Examples 2-5] In Example 1, P-
Example 1 was repeated except that the amounts of 1 and P-2 added to the polyester were changed as shown in Table 2. The results are shown in Table 3.

[Example 6] In Example 1, 1.3 parts of polyethylene glycol (referred to as P-3) having an average molecular weight of 20,000 was used instead of P-1, and an average carbon number of 12 to 13 was used instead of ABS. Example 4 was carried out in the same manner as in Example 1 except that 0.4 part of sodium alkylsulfonate (DS) was used and the amount of P-2 added was 1.2 parts. The results are shown in Table 3.

Comparative Example 1 Example 2 is the same as Example 2 except that the polyether-modified polysiloxane is not used.
It carried out similarly to. The results are shown in Table 3.

Comparative Example 2 Example 6 is the same as Example 6 except that the polyether-modified polysiloxane is not used.
It carried out similarly to. The results are shown in Table 3.

[0088]

[Table 2]

[0089]

[Table 3]

[0090]

EFFECTS OF THE INVENTION According to the present invention, when subjected to a high alkali weight reduction process, it has a high degree of antistatic property with improved washing durability, and also has a visual infection color, operational stability, and quality stability. An excellent antistatic polyester fiber is obtained, and it can be widely used not only for inner wear for women such as lingerie, lining and dust-free garments, but also for outerwear.

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location D01F 6/92 N P D06M 11/38 15/643 // D06M 101: 32

Claims (3)

[Claims] 1. A polyoxyalkylene glycol or a derivative thereof is added to a polyester matrix in an amount of 0.5.
% To 5% by weight and an organic metal salt of 0.1 to 2% by weight, wherein the polyoxyalkylene glycol or its derivative contains a polyether-modified polysiloxane represented by the following general formula. Characteristic antistatic polyester fiber. [Chemical 1] (In the formula, Si is a polysiloxane residue, X ₁ and X ₂ are polyoxyalkylene glycol residues, R is a hydrogen atom, a monovalent hydrocarbon group having 1 to 40 carbon atoms, or 2 to 2 carbon atoms.
40 represents a monovalent acyl group. ) 2. A polyoxyalkylene glycol or a derivative thereof is dispersed as an independent island component in an arbitrary fiber cross-section while having a continuous linear form in the fiber axis direction of the fiber and the island. The antistatic polyester fiber according to claim 1, wherein the largest island component among the components has a size in the fiber cross-sectional direction of 50 to 300 nm. 3. The polyalkylene glycol derivative is represented by the following general formula and has an average molecular weight of 5,000 to 16,
3. The antistatic polyester fiber according to claim 1, which contains 000 non-random copolymerization type polyoxyethylene type polyether. [Chemical 2] (Z is an organic compound residue having 1 to 6 active hydrogen and a molecular weight of 300 or less, R ₁ is an unsubstituted or substituted alkylene group having 6 or more carbon atoms, R ₂ is a hydrogen atom, and 1 to 40 carbon atoms.
A monovalent hydrocarbon or a monovalent acyl group having 2 to 40 carbon atoms, k is an integer of 1 to 6, n is an integer in which k × n is 70 or more, and m is an integer of 1 or more).