WO2008053977A1

WO2008053977A1 - Antistatic core-sheath type ultrafine-denier false-twisted polyester yarn, process for production thereof, and antistatic water-repellent fabrics comprising the yarn

Info

Publication number: WO2008053977A1
Application number: PCT/JP2007/071351
Authority: WO
Inventors: Suguru Nakajima
Original assignee: Teijin Fibers Limited
Priority date: 2006-10-30
Filing date: 2007-10-26
Publication date: 2008-05-08
Also published as: TW200831726A; DE602007011096D1; JP4896985B2; KR20090076995A; US20100313990A1; CA2668002A1; ATE491057T1; TWI431174B; KR101331636B1; CA2668002C; EP2078771B1; JPWO2008053977A1; EP2078771A4; EP2078771A1

Abstract

Since the false-twisted polyester yarn of the invention contains an antistatic component in a state enveloped in a sheath, the antistatic component is little deformed by false twisting. Therefore, the yarn little fluffs in false twisting and can give a polyester fabric which is improved in antistatic properties while retaining the soft hand, hot insulation, and water- and moisture-absorbing properties inherent in conventional ultrafine-denier false-twisted polyester yarn. The antistatic component of the yarn of the invention is excellent in heat resistance as compared with conventional polyether amide antistatic agents, so that the fabric is excellent in washing durability in a state dyed by the high-pressure method and thus useful as antistatic fabric for student's wear, uniform, dust protective wear, and so on.

Description

Patent application title: Antistatic core-sheath type polyester extra fine false twisted yarn, production method thereof, and antistatic water-repellent woven fabric including the antistatic core-sheath type polyester extra fine false twisted yarn

The present invention relates to a core-sheath polyester ultrafine false twisted yarn having antistatic properties, a method for producing the same, and an antistatic fabric including the antistatic core-sheath polyester ultrafine false twisted yarn. More specifically, the present invention relates to a production method for stably obtaining a polyester extra fine false twisted yarn having a core-sheath structure having excellent durability and antistatic properties. Background art

Polyester fibers are widely used for clothing and other applications due to their superior quality and stable physical properties. However, since polyester is inherently water-phobic, many attempts have been made to impart antistatic properties by imparting hydrophilicity to polyester in fields where antistatic properties are required. Examples thereof include a method of blending a polyoxyalkylene polyether compound with polyester (Japanese Patent Publication No. 39-52 14), a polyoxyalkylene polyether compound that is substantially incompatible with polyester, and the like. Method of blending organic / inorganic ionic compounds (Japanese Patent Publication No. 44-3 1 8 28, Japanese Patent Publication No. 60-1 1 944, Japanese Patent Publication No. 5 3-8 04 97, Japanese Patent Publication No. 5 3-1 4 9 24 7, Japanese Patent Application Laid-Open No. 6-0-3 9 4 1 3, Japanese Patent Application Laid-Open No. 3-1 3 9 5 5 6, etc.) are known.

However, in the above method, although good antistatic properties are exhibited in the case of ordinary drawn yarn (FOY), in the case of false twisted yarn, fluff is generated due to deformation of false twist. There was a problem that sex could not be obtained. In particular, in recent years, there has been a demand for texture, texture, appearance, etc. Fabrics with a soft texture are produced using polyester fine yarn with ultrafine fineness with a single yarn fineness of 1.6 dtex or less. In this case, it becomes extremely difficult to sufficiently suppress the generation of static electricity as the fineness becomes finer. So far, it has been used for sports clothing, uniforms, dust-proof clothing, etc. Even in applications such as shirts, it is no exaggeration to say that there are no fabrics with sufficient antistatic properties. Disclosure of the invention

An object of the present invention is to obtain a polyester fabric having excellent antistatic performance while maintaining the soft texture, heat retention, water absorption, moisture absorption, etc. possessed by the ultra fine polyester false twisted yarn. An object of the present invention is to provide a core-sheath type polyester extra fine false twisted yarn and a method for producing a core-sheath type polyester extra fine false twisted yarn which can be stably produced.

As a result of diligent investigations to achieve the above object, the present inventors have found that a core component comprising a polyester containing a polyoxyalkylene polyether compound and an organic ionic compound that are substantially incompatible with polyester. It has been found that the object of the present invention can be achieved when a core-sheath type polyester ultrafine composite fiber coated with a sheath component is melt-spun under specific conditions and then stretched false twisted.

That is, according to the present invention,

(1) A core-sheath type composite fiber subjected to false twisting, wherein the core part of the core-sheath type composite fiber is used as an antistatic agent with respect to 100 parts by weight of the aromatic polyester.

(a) a polyoxyalkylene-based polyether 0.2 to 30 parts by weight, and

(b) an organic ionic compound that is substantially non-reactive with the polyester, from 5 to 10 parts by weight;

On the other hand, the sheath is formed from the aromatic polyester composition B, and the core-sheath type composite An antistatic core-sheath polyester extra fine false twisted yarn characterized in that the synthetic fiber simultaneously satisfies the following conditions (1) to (3):

(1) The single yarn fineness of the false twisted yarn is 1.6 dte x or less.

(2) The crimp rate of the false twisted yarn is 3 to 30%.

(3) Ratio of core area S A and sheath area S B S A: S B is in the range of 5:95 to 80:20.

as well as,

(2) The core is as an antistatic agent with respect to 100 parts by weight of the aromatic polyester, (a) 0.2 to 30 parts by weight of a polyoxyalkylene polyether, and (b) substantially non-woven with the polyester. Reactive organic ionic compounds 0.0 5 to 10 parts by weight

On the other hand, when melt-spinning the core-sheath type composite fiber formed from the antistatic polyester composition A and containing the sheath force aromatic polyester composition B, the discharge speed and the drawing speed during spinning are reduced. A special feature is to take a false twist ratio after taking the ratio of take-off speed (take-off speed, discharge speed, hereinafter abbreviated as draft ratio) in the range of 150 or more and less than 800. Electrical core-sheath type Polyester extra fine false twisted yarn manufacturing method.

And

(3) A woven fabric including a core-sheath type polyester false twisted yarn, wherein the core-sheath type polyester false twisted yarn is the antistatic core-sheath type polyester extra fine false twisted yarn described in (1) above. Anti-static fabric.

Is provided. Brief Description of Drawings

Fig. 1 is a schematic diagram of a drawing simultaneous false twisting machine for producing false twisted yarn used in the present invention, wherein 1 is a core-sheath type polyester undrawn yarn, 2 is a yarn guide, 3 and 3 'are Feed roller, 4 and 4 'are interlace nozzles, 5 is the first stage heater, 6 is the cooling plate, 7 is the false twister (3-axis friction disk unit), 8 is the first delivery roller, and 9 is the second Stage heater, 1 0 is the second delivery roller, 11 is the winding roller, and 12 is the polyester false twisted cheese.

FIG. 2 is a front view showing an embodiment of a false twisted disk unit used in the present invention. 13 is a false twisted disk, 14 is a guide disk, 15 is a rotating shaft, and 16 is a timing. Belt, 17 is a drive belt. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail.

The polyester referred to in the present invention is an aromatic polyester having an aromatic ring in a polymer chain unit, which is obtained by reacting a bifunctional aromatic carboxylic acid or an ester-forming derivative thereof with a diol or an ester-forming derivative thereof. The obtained polymer is an object.

The difunctional aromatic carboxylic acids mentioned here include terephthalic acid, isophthalenoic acid, onolephthalic acid, 1,5-naphthalenediform norevonic acid, 2,5-naphthalenediform norevonic acid, 2,6-naphthalenedicanolepon Acid, 4, 4'-biphenyl dicarboxylic acid, 3, 3 '— biphenyl / residic power / levonic acid, 4, 4 — biphenylenoate / resicarboxylic acid, 4, 4'-biphenyleno methane dicanolevonic acid, 4 , A'-biphenylenoleshondikanolevonic acid, 4,4'-biphenylisopropylidenedicarboxylic acid, 1,2-bis (phenoxy) ethane-4,4'-dicarboxylic acid, 2,5-anthracenedicarpo Acid, 2,6-anthracene dicarboxylic acid, 4,4'-p-phenylene dicarboxylic acid, 2,5-pyridinedicanolevonic acid, j3-hydroxyloxybenzoic acid, p-oxybenzoic acid, etc. In particular, terephthalic acid is preferable.

Two or more of these difunctional aromatic carboxylic acids may be used in combination. If the amount is small, these difunctional aromatic carboxylic acids and bifunctional aliphatic carboxylic acids such as adipic acid, azelaic acid, sebacic acid, and dodecanedioic acid rubonic acid, and bifunctional hexanedicarboxylic acid Use of one or more alicyclic carboxylic acids, 5-sodium sulfoisophthalic acid, etc. can do.

Examples of the diol compound include ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, neopentyl glycol, 2-methyl-1,3-propanediol, diethylene glycol, and trimethylene glycol. Preferred examples include aliphatic diols, alicyclic diols such as 1,4-cyclohexanedimethanol, and mixtures thereof. If the amount is small, polyoxyalkylene glycol having both ends or one end unblocked can be copolymerized with these diol compounds.

Furthermore, polycarboxylic acids such as trimellitic acid and pyromellitic acid, and poly'ols such as glycerin, trimethylolpronone and pentaerythritol can be used within the range in which the polyester is substantially linear. . Specific preferred aromatic polyesters include polyethylene terephthalate, polybutylene terephthalate, polyhexylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, polyethylene-1,2 bis (phenoxy) ethane 1,4,4 ' In addition to carboxylates, there may be mentioned copolyesters such as polyethylene isophthalate terephthalate, polybutylene terephthalate isophthalate, polybutylene terephthalate / decane dicarboxylate, and the like. Of these, polyethylene terephthalate and polybutylene terephthalate having a good balance of mechanical properties and moldability are particularly preferred. Such aromatic polyester is synthesized by any method. For example, when describing polyethylene terephthalate, terephthalic acid and ethylene glycol are directly esterified, or terephthalic acid, such as dimethyl terephthalate, is transesterified with ethylene glycol or terephthalic acid and ethylene. The first stage reaction to form terephthalic acid dallicol ester and Z or its low polymer by reacting with oxside, and then heating the product under reduced pressure until the desired degree of polymerization is reached The second stage of the polycondensation reaction And easily manufactured.

The polyoxyalkylene-based polyether (a) to be blended in the composition used in the present invention is a polyoxyalkylene comprising a single oxyalkylene unit as long as it is substantially insoluble in the polyester. It may be a non-glycolene or a copolymerized polyoxyalkylene glycol composed of two or more oxyalkylene units, and is a poxyethylene-based polyetherol represented by the following general formula (I): Also good. .

Z + << CH ₂ CH, 0> One (R ¹ O) One-R ^2- (I)

(In the above formula (I), Z is an organic compound residue having 1 to 6 active hydrogen atoms, R ¹ is an alkylene group or substituted alkylene group having 6 or more carbon atoms, R ² is a hydrogen atom, or carbon atoms. A monovalent hydrocarbon group having 1 to 40 carbon atoms, a monovalent hydroxy hydrocarbon group having 2 to 40 carbon atoms, or a monovalent acyl group having 2 to 40 carbon atoms, k is an integer of 1 to 6, n Is an integer satisfying n≥ 7 OZk, and m is an integer of 1 or more.

Specific examples of such polyoxyalkylene polyethers include polyoxyethylene dalycol having a molecular weight of 400 or more, polyoxypropylene dalycol having a molecular weight of 100 or more, polyoxytetramethylene glycol, Ethylene oxide with a molecular weight of 2 000 or more, propylene oxide copolymer, trimethylolpropane ethylene oxide adduct with a molecular weight of 4000 or more, nonino olefin ethylene oxide adduct with a molecular weight of 3000 or more, and these Examples include compounds in which a substituted ethylene oxide having 6 or more carbon atoms is added to the terminal OH group, and in particular, a polyoxyethylene glycol having a molecular weight of 100 to 1,000,000 and a molecular weight of 5 An alkyl group-substituted ethylene oxide having 8 to 40 carbon atoms at both ends of polyoxyethylene glycol of 0 0 0 to 1 6 0 0 0 Compound but with the addition is preferred.

The compounding amount of the polyoxyalkylene polyether compound is as follows: The range is 0.2 to 30 parts by weight per 100 parts by weight of the aromatic polyester. When the amount is less than 2 parts by weight, the hydrophilicity is insufficient and sufficient antistatic property cannot be exhibited. On the other hand, if the amount is more than 30 parts by weight, the antistatic effect is no longer recognized, and the mechanical properties of the resulting composition are deteriorated, and the polyether easily bleeds out. At the time of melt molding, the chip rudder's biting ability is lowered and the molding quality is also deteriorated.

In the polyester composition of the present invention, an organic ionic compound is blended particularly for improving antistatic properties. Preferred examples of the organic ionic compound include sulfonic acid metal salts and sulfonic acid quaternary phosphonium salts represented by the following general formulas (II) and (III). RSO, M ...... (II)

^

(In the above formula (II), R represents an alkyl group having 3 to 30 carbon atoms or an aryl group having 7 to 40 carbon atoms, and M represents an alkali metal or an alkaline earth metal.)

RS 0 ₃ PR ¹ R ² R ³ R ⁴ …… (III)

(In the above formula (III), R is an alkyl group having 3 to 30 carbon atoms or an aryl group having 7 to 40 carbon atoms, and R ¹ , R ² , R ³ and R ⁴ are alkylene groups. A lower alkyl group, a phenyl group, or a benzyl group.

In the above formula (II), when R is an alkyl group, the alkyl group may be linear or may have a branched side chain. M is an alkali metal such as Na, K, Li or the like, or an alkaline earth metal such as Mg, Ca, among which Li, Na, K is preferable. Such sulfonic acid metal salts may be used alone or in combination of two or more.

Preferred examples include sodium stearyl sulfonate, sodium octyl sulfonate, sodium dodecyl sulfonate, and the number of carbon atoms. Sodium alkyl sulfonate mixture with an average of 14, sodium dodecyl benzene sulfonate mixture, sodium dodecyl benzene sulfonate (hard type, soft type), lithium dodecyl benzene sulfonate (hard type, soft type), dodecyl Examples thereof include magnesium benzenesulfonate (hard type and soft type).

In addition, the sulfonic acid quaternary phosphonium salt in formula (III) may be used alone or in combination of two or more. Preferable examples include tetrabutylphosphonium alkyl sulfonate having an average of 14 carbon atoms, tetraphenyl phosphonium alkyl sulfonate having an average of 14 carbon atoms, and an average of 14 carbon atoms. Anolequil senorephonic acid pentinotriphenyl phenorephosphonium, dodecinorebenzene sulphonate tetrabutylphosphonium (hard type, soft type), dodecyl benzene tetraphenylphosphonium sulphonate (hard type, soft type), dodecylbenzene sulfonic acid benziltri Examples thereof include phenylphosphonium (hard type, soft type) and the like. '

These organic ionic compounds may be used alone or in combination of two or more thereof, and the blending amount thereof is in the range of 0.05 to 10 parts by weight with respect to 100 parts by weight of the aromatic polyester. is required. When the amount of the organic ionic compound is less than 0.05 parts by weight, the effect of improving antistatic properties is small, and when it exceeds 10 parts by weight, the mechanical properties of the composition are impaired, and the ionic compound However, it is easy to bleed out, so that the chip rudder bite at the time of melt molding is lowered and the molding stability is also deteriorated.

Polyester B may be blended with a known matting agent, such as titanium dioxide, as long as the object of the present invention is not impaired. However, if the amount of the erasing agent exceeds 10 wt%, the spinnability of the undrawn yarn that becomes the parent yarn of the present invention deteriorates, and therefore the range is preferably set to 0.01 to 10 wt%.

In addition, the ultra fine false twisted yarn of the present invention needs to have a single yarn fineness of 1.6 dtex or less and a crimping rate of 3 to 30%, and by making it within this range, the soft feel is excellent. A woven or knitted fabric is obtained. If the crimp rate is less than 3%, weave When a knitted fabric is used, a sufficient feeling of fluffiness cannot be obtained. On the other hand, if it exceeds 30%, the antistatic performance tends to decrease, which is not preferable.

Furthermore, the ratio S A: S B of the area S A of the core portion and the area S B of the sheath portion needs to be in the range of 5:95 to 80:20. When the area ratio is less than 5:95, the antistatic performance due to polyester A is insufficient, and when it is greater than 80:20, the Al force is reduced by 10% or more. In some cases, the antistatic polyester of the part elutes and the antistatic performance decreases, or the strength of the false twisted yarn decreases to 3.0 cNZd te X or less, and the strength when used as a fabric is insufficient. It is not suitable for applications that require strength, such as sports clothing, and is not preferable because the applications are limited.

The polyester ultra-fine false twisted yarn of the present invention described above, when melt spinning the undrawn yarn that is the parent yarn, the ratio of the discharge speed and the take-off speed during spinning (take-off speed Z discharge speed, hereinafter draft) Stable anti-static performance can be obtained by false twisting the undrawn yarn taken in the range of 150 or more and less than 800. When the draft is less than 150, the antistatic performance due to polyester A is insufficient, and when the draft is 800 or more, the antistatic performance is exhibited, but the spinnability is lowered, which is not preferable. .

In order to set the draft within the above range, the nozzle discharge hole diameter and spinning speed should be set appropriately, but the discharge hole diameter should be Φ 0.1 to 0.3 mm, and the spinning speed 200 00 to 4 500 m / min. In particular, melt spinning in the range of 2500-3500 m / min is preferable because it can be obtained easily and efficiently.

At that time, the birefringence of the unstretched multifilament is preferably in the range of 0.02 to 0.05. When the birefringence is less than 0.02, the tension during false twisting is low, and surging is likely to occur, and due to yarn swaying, heat set spots occur, defective dyeing, and weaker threads due to increased processing magnification. Therefore, it is not preferable. On the other hand, when the birefringence index exceeds 0.05, the yarn fluff is likely to occur and the process becomes unfavorable.

The false twisting method for the undrawn yarn is not particularly limited, but for example, the methods described below are used. 0 First, the air entanglement treatment may be performed in a separate process from the drawing false twisting process. However, as shown in FIG. 1, an interlace nozzle is installed in the drawing false twisting apparatus and is applied immediately before the drawing false twisting process. Is preferred. This suppresses the occurrence of fluff and has a positive effect on handling.Furthermore, by applying air entanglement to the yarn after heat-set false twisting, the mixed fiber entanglement is made uniform, and the effect in the yarn length direction is uniform. Therefore, it has anti-electric control and expresses a high-class feeling.

Next, the undrawn yarn subjected to the entanglement process is subjected to a drawn false twisting machine equipped with a two-stage heater as shown in FIG. 1 to obtain a crimped polyester false twisted yarn. .

In FIG. 1, the process of subjecting the polyester undrawn yarn (1) to an air entanglement process using an interlace nozzle (4, 4 ') installed between two pairs of feed rollers (3, 3') is shown. Are listed. The unstretched yarn that has been entangled here is rubbed with the rotating false twisting disk (7) while being drawn between the feed roller (3 ') and the first delivery roller (8). Is twisted. During this time, it is heat-treated by the first stage heater (5), cooled by the cooling plate (6), passed through the false twist disk (7) and untwisted. Furthermore, the running yarn is reheated as necessary by a second stage heater (9) installed between the first delivery roller (8) and the second delivery roller (10). Air-entangled yarn (4,) is applied to the yarn after heat-set false twisting, and then wound as a cheese-like package (12) with a take-off roller (11) to produce a polyester false twisted yarn. In consideration of high-speed stretch calcining, the first stage heater (5) and the second stage heater (9) are preferably non-contact type. In particular, the second stage heater is not used in many cases, but it may be used if necessary, such as the texture.

In the present invention, the false twister (7) force S, the triaxial friction disc type as shown in Fig. 2 and the lowermost disc material located at the untwisting portion is ceramic, and the running yarn and The contact length with the disk is 2.5 to 0.5 mm, and the disk has a diameter 9 of the disk immediately upstream. 'It preferably has a diameter of 0-9 8%.

That is, the false twisting tool (7) illustrated in Fig. 2 is of a three-axis friction disk type in which two false twisted disks (1 3) are attached to three rotating shafts (15), respectively. Thus, each rotating shaft (15) is rotated at a predetermined speed by a timing belt (16) driven by a driving valve (17) to rotate each false twist disk (13). In the method of the present invention, at least one of the false twisted discs (1 3) is the lowermost disc (the lower disc attached to the left rotating shaft in the example of FIG. 2) located in the flame retardant part, and is made of ceramic. Use a disk whose diameter is 90 to 98% of the diameter of the disk immediately upstream (the lower disk attached to the central rotating shaft in the example in Fig. 2). The contact length between the ceramic disk and the running yarn is 2.5 to 0.5 mm.

At this time, the lowermost disk material is preferably ceramic from the viewpoint of wear resistance. According to the studies by the present inventors, in the composite false twisting process according to the present invention, when the contact length between the running yarn and the disk is set to 2.5 to 0.5 mm, the twisting is finished. The contact area when the compressed yarn enters the final untwisted portion is minimized, the resistance can be reduced, and as a result, the fluff is significantly reduced, resulting in an increase in strength, and Setting the diameter of the disk within the range of 90 to 98% of the diameter of the disk just above reduces the resistance value when moving the yarn guide to the next step (specifically, the heat set) and makes it smooth. It was found that it was effective in moving to In particular, it was confirmed that setting the contact length between the running yarn and the disk to 2 _: 5 to 0.5 mm significantly reduced the processed fluff and consequently improved the strength.

The false twisting temperature in the present invention is preferably a glass transition temperature (hereinafter referred to as TG) TG + 100 ° C to TG + 200 ° C, specifically 10 to 300 ° C. If this temperature is less than 1700 ° C, the crimping performance is low, the texture is hard, and if it exceeds 300 ° C, the processed yarn will become extremely flat and the fluff will be generated. It is not preferable. Non-false twisting machine In the case of using an apparatus equipped with a contact heater, it is preferable to heat-treat the first stage non-contact heater at a set temperature of 170 to 300. The proper heater temperature here is based on a commercially available false twisting machine (Teijin Seisakusho 2 1 6-storied HTS—15 V), which is a non-contact type 1.0 to 1.5 m long. The yarn speed is assumed to be from 800 m min., So when using special heaters or processing at ultra high speeds, the set temperature should be adjusted appropriately. Of course.

Here, the first heater in the twisted region is for improving the drawability and false twisting property (twistability) of the undrawn yarn, and this temperature is 1 7 0 in the case of a non-contact heater. If the temperature is less than ° C, the twistability is lowered, and the desired crimp of the present invention cannot be imparted, and the texture of the woven or knitted fabric becomes paper-like. In addition, yarn breakage and fluff are more likely to occur during drawing temporary machine processing, and crimped spots and dyed spots are more likely to occur during dyeing. On the other hand, when the temperature of the first heater exceeds 30 ° C. and 0 ° C., single yarn breakage is likely to occur during drawing false twisting, and in particular, the single yarn on the undrawn yarn (B ′) on the high elongation side. The polyester composite false twisted yarn obtained is prone to breakage and has a lot of fluff. Depending on the type of drawing false twisting machine, the first stage heater may be divided into the first half and the second half, but in the method of the present invention, the first half and the second half of the first stage heater are the same. What is necessary is just to set to temperature.

The heat treatment time of the yarn in the first stage heater may be set as appropriate depending on the type of heater, its length, its temperature, etc., but if the heat treatment time is too short, the crimp rate tends to be insufficient. In addition, stretched false twisted yarn, fluff of preliminarily burned yarn, and knitting on knitted fabrics are likely to occur due to tension fluctuations. On the other hand, if the length is too long, the crimp rate tends to be too large. For this reason, when heat-treating with a non-contact type heater, a range of 0.04 to 0.12 seconds, particularly a range of 0.06 to 0.10 seconds is appropriate.

Furthermore, the draw ratio during processing is 1.4 to 2.4, which is the optimum zone. If the area is outside this range, surging, generation, Due to heat set spots due to this, on the high-magnification side, the processed yarn is flattened, and processed fluff is generated, which is not preferable.

'The number of false twists is [(1 5 0 0 0 to 3 5 000) times ^1/2 ] times when the fineness of the composite false twisted yarn is Y (dtex), more preferably [(2 0 0 0 0 to 3 00 00) Set ZY ^1/2 ] times / m. If the false twist number is less than ¹ 500 000 / Y ^1/2 times Zm, it becomes difficult to give fine and strong crimps, and the resulting fabric becomes paper-like, and the texture is hard. Become. If the number of false twists exceeds 3 5000 ZY ^1/2 turns, the occurrence of yarn breakage and fluff will increase.

The ultra fine polyester false twisted yarn of the present invention thus obtained maintains the soft texture, heat retention, water absorption, hygroscopic properties, etc. of the conventional ultra fine polyester false twisted yarn. A polyester fabric excellent in performance can be obtained.

Example

Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples. In addition, each measured value shown in an Example is the value measured by the following method. In addition, “parts” in the examples means parts by weight unless otherwise specified.

(1) Intrinsic viscosity

It was dissolved in olsochlorphenol and measured at 35 ° C using an Ubbelohde viscometer.

(2) Travel angle

Take a picture of the yarn running on false twisting disc ¹ , measure the running angle 0 of the yarn on each false twisting disc on the photo, and run the average of those measured values It was a corner.

(3) Crimp rate ''

A polyester false twisted yarn sample was wound on a cassette frame with a tension of 0.044 c N / dtex to produce a cassette of about 3 300 dte X. Apply two loads of 0.0 1 7 7 c N no dte X and 0.1 77 c NZ dtex to one end of the case and measure the length SO (cm) after 1 minute. did. Next, with a load of 0.177 cN dtex removed, the substrate was treated in boiling water at 100 ° C. for 20 minutes. After the boiling water treatment, remove the load of 0.0 1 77 c N / dtex, let it air dry 24 hours free, and then re-load the load of 0.0 1 7 7 c N / dtex and 0.1 77 c NZd tex again After loading, the length after 1 minute was measured and defined as S 1 (cm). Next, remove the 0.1 7 7 c N / dte X load, measure the length after 1 minute and set it as S 2, calculate the crimp rate by the following formula, Expressed as an average value. Crimp rate (%) = [(S 1 -S 2) ZS 0] X 100

(4) Texture

The false twisted yarn of the present invention was used as a fabric, and was ranked into levels 1 to 3 as follows by a sensory test by an expert.

(Soft feeling)

Level 1: Soft and supple feel

Level 2: Slightly soft but feels repellent

Level 3: A crisp or hard feel.

(5) Number of fuzz

Using a DT-1 04 type fluff counter manufactured by Toray Industries, Inc., a polyester false twisted yarn sample was continuously measured at a speed of 50 OmZmin for 20 minutes, and the number of fluffs was measured. It was expressed by the number of

(6) Chargeability test method ''

(Friction band, voltage measurement method) 'While rotating the test piece, rub with a friction cloth and measure the generated voltage. Follow L 10 94 Charging Test Method B (Friction Band Voltage Measurement Method). Regarding the antistatic effect, if the frictional voltage is about 2000 V or less (preferably 1 500 V or less), the antistatic effect is exhibited.

Example 1

100 parts of dimethyl terephthalate, 60 parts of ethylene glycol, acetic force Rushiumu monohydrate 0.0 6 parts of cobalt acetate as Seiirozai tetrahydrate (0.06 6 mol ^_0/0 for dimethyl terephthalate) 0 . 0 1 3 parts (Telefu See charged against barrel dimethyl 0.01 mole ^_0/0) to an ester exchange reaction can, heated the reaction over a period of 4 hours under a nitrogen gas atmosphere from 140 ° C to 220 ° C, reactor The ester exchange reaction was carried out while distilling off the methanol produced inside.

After transesterification completion, trimethylene phosphate Le 0.058 parts as a stabilizer to the reaction mixture (0.080 mol ^_0/0 for dimethyl terephthalate), and dimethyl polysiloxane was added 0.024 parts of a defoamer It was. Next, after 10 minutes, 0.041 parts of antimony trioxide (0.027 mol% with respect to dimethyl terephthalate) was added to the reaction mixture, and at the same time, an excess of ethylene glycol was distilled off at 240 ° C. The reaction mixture was then transferred to a polymerization reactor. Next, after reducing the pressure from 76 OmmHg to 1 mmHg over 1 hour and 40 minutes and raising the temperature from 240 ° C to 280 ° C to cause the polycondensation reaction, the water-insoluble polyoxyethylene polymer represented by the following formula was used. 4 parts of ether and 2 parts of sodium dodecylbenzenesulfonate were added under vacuum and allowed to undergo a polycondensation reaction for an additional 240 minutes, followed by 0.4 part of Iryganox 1 01 0 made by Chipapaigi Co., Ltd. as an antioxidant. And then a polycondensation reaction was carried out for another 30 minutes. In the polymerization reaction step, an antistatic agent was added, and the resulting polymer was formed into a chip by a conventional method.

^C J ^H t I + I

-C H. C H O

i .cj ^H 2 in

(However, j is an integer between 18 and 28, average 2 1, P is 100 as an average value, and m is 5 as an average value. Here, the average value is a common value consisting of two or more kinds of oxchethylene units. Means the average number of oxyethylene units in polymerized polyoxyethylene polyether.)

The obtained polymer had an intrinsic viscosity of 0.565 and a softening point of 258 ° C. The obtained chip and a normal polyethylene terephthalate chip having an intrinsic viscosity of 0.65 containing 0.4% by weight of titanium oxide fine particles were dried by a conventional method, and then the chips were each subjected to a conventional method in a spinning facility. And then introduced into each composite fiber spin pack through a spin block. The spinneret with 72 core-sheath compound circular discharge holes built in the spin pack was cooled and solidified with cooling air from a normal cross-flow type spinning cylinder, and the spinning oil was applied while being solidified. Polyester that is bundled as two yarns, taken up at a speed of 300 m / min (draft magnification: 200), and the core / sheath area ratio of 140 dtex / 7 2 filament is 70:30 A core-sheath type composite undrawn yarn was obtained.

This polyester unstretched yarn is applied to Teijin Seiki's 2 1 6-ply HT S—15 V, and as shown in (4, 4 ') in Fig. 1, at the front and rear stages, a compressed air blowout with a hole diameter of 1.8 mm Air is entangled so that the degree of entanglement is 5.0 at a flow rate of 60 n L / min while passing through an interlace nozzle with holes, stretching magnification 1.60, first heater (non-contact type) temperature 2 A urethane disk with a diameter of 60 mm and a thickness of 9 mm was set as a false twisted disk under the condition of 50 ° C, and the false twist number X (false twisted yarn fineness (dte X)) ^1/2 was 26. , Stretched false twist to be close to 0 0 0, wound into cheese shape at a speed of 800 m / min, 84 dte X 7 7 filament (average single yarn fineness 1. 1 7. dte X) A polyester false twisted yarn having a core-sheath ratio of 70:30 was obtained.

A cylindrical knitted fabric was manufactured using these polyester false twisted yarns, and the antistatic property was measured. The friction false voltage of the obtained polyester false twisted yarn was 1200 V. In addition, these polyester false twisted yarns were made into woven fabrics by a conventional method, and the quality of the polyester was evaluated by sensory evaluation.As a result, it had a very deep, high-class feeling and a soft feeling. there were. The results are shown in Table 1.

Comparative Example 1

More than 97% of both ends can be obtained by reacting acrylonitrile with polyethylene dallicol in the presence of an alkaline catalyst, followed by a hydrogenation reaction. Polyethylene glycol diamine (number average molecular weight 4 00 0) with amino group on top is synthesized, and this is a salt reaction with adipic acid by a conventional method to form a 45% aqueous solution of polyethylene glycol diammonium adipate. Obtained.

Capacity polyethylene glycol concentration can of the 4 5% 2m ³ Jian mode Niumuaji Bae over preparative aqueous 2 0 0 k g. 8 5% strength caprolactam solution 1 2 0 kg, 4 hexamethylene diammine monitor © 0% of the 16 kg of an aqueous solution of mysophthalate was added, heated for about 2 hours at normal pressure until the internal temperature reached 110 ° C, and concentrated to 80% concentration. Subsequently, the concentrated solution was transferred to a polymerization vessel having a capacity of 80 &, and heating was started while flowing nitrogen at a rate of 2.51 / min.

Sodium dodecylbenzenesulfonate When the internal temperature becomes 1 2 0 ° C 5. 2 kg and (2.5 wt ^_0/0) 1, 5, 5 trimethyl-2, 4, 6 and. Li (3 , 5 di tert-butyl 4-hydroxybenzene) Add benzene (TTB) 5.2 kg (2.5 wt%) and start stirring until the internal temperature reaches 2 45 ° C. The polymerization was completed by heating for 8 hours. After the completion of weighting, pelletization was carried out by a conventional method to obtain pellets comprising a block polyether amide composition.

Pellet made of the above-mentioned block polyetheramide yarn and a composite is 1.4 weight. /. In the same manner as in Example 1 except that it was blended with a polyethylene f-phthalate chip having an intrinsic viscosity of 0.65, which does not contain titanium oxide, and this was used as the core component, 8 4 A polyester false twisted yarn having a core-sheath ratio of dte xZ 72 filament (average single yarn fineness of 1.1 7 dte X) of 70:30 was obtained. The fabric made of this fiber showed a soft and excellent texture similar to that of Example 1, but the frictional voltage was very poor at 3400 V. The results are summarized in Table 1.

Examples 2-3

Except for changing the polymer discharge rate, the same procedure as in Example 1 was performed, and 5 6 dte xZ7 2 filaments (average single yarn fineness 0.78 dte X) and A core-sheath-type composite polyester false twisted yarn having a core-sheath ratio of 1 1 1 dte 7 2 filament (average single yarn fineness of 1.54 dtex) of 70:30 was obtained. Fabrics made from these yarns were excellent in both friction withstand voltage and texture. The results are summarized in Table 1.

Comparative Examples 2-3

Except for changing the polymer discharge rate, the same procedure as in Comparative Example 1 was carried out, and 5 6 dte xZ7 2 filaments (average single yarn fineness 0.78 dtex) and 1 lidtex no 7 2 filaments (average single yarn fineness 1. A core / sheath type composite polyester false twisted yarn having a core / sheath ratio of 5 4 dtex) of 70:30 was obtained. Fabrics made from these yarns were excellent in texture as in Example 1, but had a high frictional voltage and were not suitable for practical use. The results are summarized in Table 1.

Comparative Example 4

Except for increasing the polymer discharge rate, the same procedure as in Example 1 was carried out, and the core-sheath ratio of 1 3 3 dte xZ 7 2 filaments (average single yarn fineness 1.85 5 dtex). Ratio 7 0: 30 core sheath A mold composite polyester false twisted yarn was obtained. The fabrics made from these yarns had excellent frictional voltage as in Example 1, but had a hard feeling and were not suitable for practical use. The results are summarized in Table 1.

Comparative Example 5

Except for changing the base to 3 6 holes, the same procedure as in Example 1 was performed, and the core sheath ratio of 8 4 dte xZ 3 6 filament (average single yarn fineness 2.3 3 dtex) was 70:30 A mold composite polyester false twisted yarn was obtained. Fabrics made from these yarns were excellent in frictional voltage as in Example 1, but had a firm feel and were not suitable for practical use. The results are summarized in Table 1.

Comparative Example 6

Except for increasing the polymer discharge rate, the same procedure as in Comparative Example 1 was carried out, and the core-sheath ratio of 1 3 3 dte xZ7 2 filaments (average single yarn fineness 1.85 5 dte X) of 70:30 A composite polyester false twisted yarn was obtained. The fabric made from these yarns has an improved frictional voltage compared to that of Comparative Example 1. 9 In addition, it was not enough for practical use. The results are summarized in Table 1.

Comparative Example 7

Except for changing the base to 3 6 holes, the same procedure as in Comparative Example 1 was carried out, and the core sheath ratio of 8 4 dte xZ3 6 filament (average single yarn fineness 2.3 3 dtex) was 70:30 A composite polyester false twisted yarn was obtained. Fabrics made from these yarns, although improved in frictional voltage than Comparative Example 1, were still not sufficient, and in addition, the texture was hard and unsuitable for practical use. The results are summarized in Table 1.

table 1

* PEG (molecular weight 2 0 0 0 0) sodium dodecylbenzenesulfonate

Claims

The scope of the claims

1. a false-twisted core-sheath type composite fiber, wherein the core part of the core-sheath type composite fiber is 100 parts by weight of an aromatic polyester as an antistatic agent.

(a) 0.2 to 30 parts by weight of a polyoxyalkylene-based polyether, and (b) an organic ionic compound that is substantially non-reactive with the polyester 0.05 to 10 parts by weight

Formed from the antistatic polyester composition A containing the sheath, the sheath, and the aromatic polyester composition B, and the core-sheath type composite fiber is the following (1) to (3) An antistatic core-sheath type polyester extra fine false twisted yarn characterized by satisfying the above conditions simultaneously.

(1) The single yarn fineness of the false twisted yarn is 1.6 dtex or less.

■ (2) The crimp rate of false twisted yarn is 3-30%.

2. The aromatic polyester composition B contains 0.01 to 10 weights of a disinfectant with respect to 100 parts by weight of the aromatic polyester. /. 2. The antistatic core-sheath polyester extra fine false twisted yarn according to claim 1, wherein the yarn is a polyester composition.

3. The anticorrosive core-sheath polyester extra fine false twisted yarn according to claim 1, wherein the disinfectant is titanium dioxide.

4. The core part is 100 parts by weight of aromatic polyester.

(a) 0.2 to 30 parts by weight of a polyoxyalkylene polyether, and

(b) Organic ionic compound substantially non-reactive with the polyester 0.05 to 10 parts by weight

On the other hand, when melt-spinning the core-sheath type composite fiber formed from the antistatic polyester composition A containing the sheath, and from the sheath part, the aromatic polyester composition B, the discharge speed and the pulling speed during spinning are reduced. It is characterized by false twisting after taking the ratio of the take-off speed (bow I take-off speed Z discharge speed, which may be abbreviated as draft magnification hereinafter) in the range of 150 to less than 800. Antistatic core-sheath type A method for producing polyester extra fine false twisted yarn.

5. The antistatic property according to claim 4, wherein the aromatic polyester composition B is a polyester composition containing 0.01 to 10% by weight of a disinfectant with respect to 100 parts by weight of the aromatic polyester. A method for producing a core-sheath polyester extra fine false twisted yarn.

6. The method for producing an antistatic core-sheath polyester extra fine false twisted yarn according to claim 4, wherein the disinfectant is titanium dioxide.

7. A water-repellent fabric in which a fabric including a core-sheath type polyester false twisted yarn is subjected to a water-repellent finish, the core-sheath type polyester false twisted yarn according to any one of claims 1 to 3 An antistatic water-repellent woven fabric characterized by being the antistatic core-sheath polyester extra fine false twisted yarn described above.