JP2010159521A - Antistatic combined-filament false twist polyester yarn and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antistatic combined-filament false twist polyester yarn giving a spun-like polyester cloth having extremely excellent bulkiness and spun touch and excellent antistatic performance. <P>SOLUTION: The antistatic combined-filament false twist polyester yarn is a combined-filament false twist polyester yarn (double-layer yarn) composed of two kinds of polyester yarns having different elongations and alternately forming an opened part III and a converged part X formed of an alternate twist yarn wound part I and an entangled part II in a longitudinal direction, wherein the core polyester yarn is a core-sheath conjugate yarn containing a specific antistatic agent in the core part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  INDUSTRIAL APPLICABILITY The present invention has a two-layer structure false twist that can be made into a fabric having antistatic properties with excellent durability, and having a spun-like bulkiness, a soft feel and waist on the surface, and a repellent texture. It is related to patchy thread.

  Polyester fibers are excellent in mechanical strength, chemical resistance, heat resistance and the like, and are widely used in clothing applications. In recent years, market needs have been diversified, and as a method of imparting a spun-like texture and bulkiness to a polyester fiber such as high-grade wool with such a polyester fiber, in particular, a polyester long fiber, for example, Japanese Patent Publication No. 60-11130 As shown in Japanese Patent Publication No. 61-19733, Japanese Patent Application Laid-Open No. 8-13275, Japanese Patent Application Laid-Open No. 2006-169697, etc., a spanlike-like combination of polyester long fibers having two or more types of elongation differences It has been proposed to improve bulkiness with false twisted two-layer structure yarn. By such a method, a bulky and spun-like polyester fabric is obtained.

  However, in recent years, when using for sports and casual use, in addition to such spun-like properties, there is an increasing demand for anti-static properties to suppress cracking static electricity, but there are currently no polyester fabrics that meet these requirements. is there.

  As for attempts to impart antistatic properties, attempts have been made to impart hydrophilicity to polyester to develop antistatic properties, and many proposals have been made so far. For example, a method of blending a polyester with a polyoxyalkylene polyether compound (Japanese Patent Publication No. 39-5214), a polyoxyalkylene polyether compound substantially incompatible with the polyester, and an organic / inorganic ionic compound (Japanese Patent Publication No. 44-31828, Japanese Patent Publication No. 60-11944, Japanese Patent Publication No. 53-80497, Japanese Patent Publication No. 53-149247, Japanese Patent Publication No. 60-39413, Japanese Patent Laid-Open No. Hei. 3-139556 gazette etc.) is known.

  However, in normal drawing (FOY), although it has antistatic properties, in the false twisted yarn, fluff is generated by twisting deformation of the crimped yarn, so there is actually no antistatic property. there were.

  In order to solve the above problem, Japanese Patent Laid-Open No. 4-146215 discloses a core containing an antistatic agent comprising a polyoxyalkylene polyether compound substantially incompatible with polyester and an organic / inorganic ionic compound. A core-sheath type polyester composite fiber included in polyester has been proposed. Although the generation of fluff in the false twisting process can be suppressed to some extent by using a core-sheath type composite fiber, strict control is required in the spinning draw false twisting process, and antistaticity, yarn breakage, and generation of fluff are required. It was not sufficient in terms of achieving both production stability and the like.

  However, in recent years, there has been an increasing demand for the texture, texture, appearance, etc. of woven and knitted fabrics, especially in applications that suppress static electricity such as school uniforms, uniforms, dust-proof clothing, etc. Fabrics having antistatic properties in applications such as shirts have been highly desired.

Japanese Patent Publication No. 60-11130 Japanese Patent Publication No. 61-19733 JP-A-8-13275 JP 2006-169697 A Japanese Examined Patent Publication No. 39-5214 Japanese Examined Patent Publication No. 44-31828 Japanese Patent Publication No. 60-11944 JP-A-53-80497 JP-A-53-149247 JP 60-39413 A JP-A-3-139556

  The present invention has been made against the background of the above-described prior art, and the object thereof is to obtain a spun-like polyester fabric having very good bulkiness and span feeling and excellent antistatic performance. The object is to provide a polyester mixed false false twisted yarn.

According to the study by the present inventors, the object of the present invention is as follows.
Two types of polyester yarns having different elongations are polyester mixed false twisted yarns formed by alternately forming a converging portion and an opening portion consisting of alternating twisted-winding portions and entangled portions in the longitudinal direction, An antistatic polyester mixed fiber false twisted yarn characterized by satisfying the following requirements.
1) Polyester yarn A having low elongation is a core-sheath type composite yarn, and the core is a polystatic compound represented by the following formula (1) as an antistatic agent with respect to 100 parts by weight of aromatic polyester. It comprises an antistatic polyester comprising 0.2 to 30 parts by weight of an oxyalkylene polyether and (b) 0.05 to 10 parts by weight of an organic ionic compound substantially nonreactive with the polyester.
2) The polyester yarn B having a high degree of elongation is made of a polyester containing 0 to 10 wt% of a matting agent with respect to 100 parts by weight of the aromatic polyester.
3) The polyester yarn A has a two-layer structure in which a core portion of false twisted yarn is formed, and the polyester yarn B surrounds the core portion in an alternately twisted yarn shape to form an outer layer portion (sheath portion).
^{_{Z - [(CH 2 CH 2}} O) n (R 1 O) m-R 2] k equation (1)
[Wherein, 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, having 1 to 40 carbon atoms. A monovalent hydrocarbon group, a monovalent hydroxy hydrocarbon 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, and n is n ≧ 70 / k. Satisfied integer, m is an integer of 1 or more]
Preferably,
Antistatic polyester blended false twisted yarn satisfying the following conditions (1) to (5):
1) The frictional voltage of the antistatic polyester mixed fiber false twisted yarn is 2000 V or less.
2) The ratio of the core area to the sheath area in the cross section orthogonal to the fiber axis of the polyester yarn A is in the range of 5:95 to 80:20.
3) The strength of the antistatic polyester blended false twisted yarn is 1.5 cN / dtex or more.
4) The crimp rate of the antistatic polyester mixed fiber false twisted yarn is 2 to 8%.
5) The average yarn length of the polyester yarn B in the antistatic polyester mixed fiber false twisted yarn is 10 to 20% longer than the average yarn length of the polyester yarn A.
It has been found that can be achieved.

  By using the antistatic polyester blended false twisted yarn (two-layer structure yarn) having the configuration of the present invention, the polyester yarn having a high elongation is preferentially drawn in the mixed yarn false twisting process, Polyester yarn containing a small antistatic agent has little damage, and even if fluff occurs, it is covered with the outer layer portion, so there is no problem in the fabric process such as weaving and the antistatic property and texture (bulkyness). An excellent fabric can be obtained.

It is the schematic which shows an example of the mixed fiber false twist processing apparatus used in Example 1. FIG. 1 is a view showing a yarn structure of an antistatic mixed fiber false twisted yarn of the present invention obtained in Example 1. FIG.

Hereinafter, embodiments of the present invention will be described in detail.
The aromatic polyester referred to in the present invention is an aromatic polyester having an aromatic ring in a polymer chain unit, and a reaction between a bifunctional aromatic carboxylic acid or an ester-forming derivative thereof and a diol or an ester-forming derivative thereof. The polymer obtained by the above is intended.

The difunctional aromatic carboxylic acids mentioned here include terephthalic acid, isophthalic acid, orthophthalic acid, 1,5-naphthalenedicarboxylic acid, 2,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, 4,4′- Biphenyl dicarboxylic acid, 3,3'-biphenyl dicarboxylic acid, 4,4'-biphenyl ether dicarboxylic acid, 4,4'-biphenylmethane dicarboxylic acid, 4,4'-biphenyl sulfone dicarboxylic acid, 4,4'-biphenyl isopropyl Redene dicarboxylic acid, 1,2-bis (phenoxy) ethane-4,4'-dicarboxylic acid, 2,5-anthracene dicarboxylic acid, 2,6-anthracene dicarboxylic acid, 4,4'-p-phenylenedicarboxylic acid, 2 , 5-Pyridinedicarboxylic acid, β-hydroxyethoxybenzoic acid, p-oxybenzoic acid Etc. can be mentioned, in particular, terephthalic acid is preferred.
Two or more of these difunctional aromatic carboxylic acids may be used in combination. In addition, in a small amount, these bifunctional aromatic carboxylic acids and bifunctional aliphatic carboxylic acids such as adipic acid, azelaic acid, sebacic acid and dodecanedioic acid, and bifunctional alicyclic carboxylic acids such as cyclohexanedicarboxylic acid are used. An acid, 5-sodium sulfoisophthalic acid, etc. can be used alone or in combination of two or more.

  Examples of diol compounds include ethylene glycol, propylene glycol, butylene glycol, hexylene glycol, neopentyl glycol, aliphatic diols such as 2-methyl-1,3-propanediol, diethylene glycol and trimethylene glycol, and 1,4-cyclohexane. Preferable examples include alicyclic diols such as dimethanol 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 polyols such as glycerin, trimethylolpropane, and pentaerythritol can be used as long as 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-4,4'-dicarboxylate. In addition, 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 preferable.

  Such aromatic polyester is synthesized by any method. For example, for polyethylene terephthalate, terephthalic acid and ethylene glycol are directly esterified, or a lower alkyl ester of terephthalic acid such as dimethyl terephthalate is transesterified with ethylene glycol, or terephthalic acid and ethylene oxide are reacted. In the first stage reaction to produce a glycol ester of terephthalic acid and / or a low polymer thereof, and then the product is heated under reduced pressure to undergo a polycondensation reaction until the desired degree of polymerization is reached. It is easily produced by a stage reaction.

The filament yarn A constituting the core part of the false twisted yarn of the present invention is a core-sheath type composite fiber, and as an antistatic agent blended in the core part polyester of the composite fiber, the polyoxyalkylene polyether (a) is As long as it is substantially insoluble in polyester, it may be a polyoxyalkylene glycol composed of a single oxyalkylene unit or a copolymerized polyoxyalkylene glycol composed of two or more oxyalkylene units. Moreover, the poxyethylene-type polyether represented by following General formula (1) is mentioned preferably.
^{_{Z - [(CH 2 CH 2}} O) n (R 1 O) m-R 2] k equation (1)
[Wherein, 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, having 1 to 40 carbon atoms. A monovalent hydrocarbon group, a monovalent hydroxy hydrocarbon 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, and n is n ≧ 70 / k. Satisfied integer, m is an integer of 1 or more]

  Specific examples of such polyoxyalkylene polyether include polyoxyethylene glycol having a molecular weight of 4000 or more, polyoxypropylene glycol having a molecular weight of 1000 or more, polyoxytetramethylene glycol, ethylene oxide having a molecular weight of 2000 or more, and a propylene oxide copolymer. Polymers, trimethylolpropane ethylene oxide adducts having a molecular weight of 4000 or more, nonylphenol ethylene oxide adducts having a molecular weight of 3000 or more, and compounds in which a substituted ethylene oxide having 6 or more carbon atoms is added to these terminal OH groups. However, polyoxyethylene glycol having a molecular weight of 10,000 to 100,000 and an alkyl group having 8 to 40 carbon atoms at both ends of the polyoxyethylene glycol having a molecular weight of 5000 to 16000. Compound conversion of ethylene oxide are added are preferred.

  Moreover, the compounding quantity of the said polyoxyalkylene type polyether compound is the range of 0.2-30 weight part with respect to 100 weight part of said aromatic polyester. When the amount is less than 0.2 parts by weight, the hydrophilicity is insufficient and sufficient antistatic property cannot be exhibited. On the other hand, even if the amount exceeds 30 parts by weight, the antistatic effect is no longer recognized, but the mechanical properties of the resulting composition are deteriorated, and the polyether is easily bleed out, so that it is melt molded. In some cases, the insertability of the chip into the ruder is reduced, and the molding stability is also deteriorated.

As the other component of the antistatic agent blended in the filament yarn A constituting the core of the false twisted yarn of the present invention, an organic ionic compound is blended particularly in order to improve 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 (2) and (3).
RSO ₃ M ...... Formula (2)
[Wherein, 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. In the above formula (2), when R is an alkyl group, the alkyl group may be linear or 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 them, Li, Na, K are preferable. Such sulfonic acid metal salts may be used alone or in combination of two or more. ]

Specific examples of preferable organic ionic compounds include sodium stearyl sulfonate, sodium octyl sulfonate, sodium dodecyl sulfonate, a mixture of sodium alkyl sulfonate having an average of 14 carbon atoms, a mixture of sodium dodecyl benzene sulfonate, and dodecyl benzene. Examples thereof include sodium sulfonate (hard type, soft type), lithium dodecylbenzenesulfonate (hard type, soft type), magnesium dodecylbenzenesulfonate (hard type, soft type), and the like.
RSO ₃ PR ₁ R ₂ R ₃ R ₄ ...... Formula (3)
[In the formula, R is the same as the definition of R in the above formula (2), and R ₁ , R ₂ , R ₃ and R ₄ are alkyl groups or aryl groups, especially a lower alkyl group, a phenyl group or a benzyl group. preferable. ]

  Such organic ionic compounds may be used alone or in combination of two or more thereof, and the blending amount thereof is preferably in the range of 0.05 to 10 parts by weight with respect to 100 parts by weight of the aromatic polyester. If the amount is less than 0.05 parts by weight, the effect of improving antistatic properties is small. If the amount exceeds 10 parts by weight, the mechanical properties of the composition are impaired, and the ionic compound also tends to bleed out. As a result, the insertability of the chip of the chip decreases, and the molding stability also deteriorates.

  Preferred examples include tetrabutylphosphonium alkyl sulfonate having an average of 14 carbon atoms, tetraphenyl phosphonium alkyl sulfonate having an average of 14 carbon atoms, and butyl alkyl sulfonate having an average of 14 carbon atoms. Triphenylphosphonium, tetrabutylphosphonium dodecylbenzenesulfonate (hard type, soft type), tetraphenylphosphonium dodecylbenzenesulfonate (hard type, soft type), benzyltriphenylphosphonium dodecylbenzenesulfonate (hard type, soft type), etc. Can give.

  Next, the filament yarn B having a high elongation constituting the antistatic mixed fiber false twisted yarn of the present invention is mainly a polyester filament whose main repeating unit is ethylene terephthalate, trimethylene terephthalate or tetramethylene terephthalate. However, a copolymerized polyester obtained by copolymerizing a small amount of the third component as required (usually 15 mol% or less, preferably 10 mol% or less, particularly preferably 5 mol% or less based on all repeating units) may be used. Further, a matting agent and other additives may be added. Among them, when containing a micropore forming agent that forms micropores or microgrooves on the fiber surface or inside the fiber by alkali weight reduction treatment, depending on the shape of the pores or grooves, It is preferable because various effects such as natural silk-like texture, sharpness, and dry touch can be expressed.

  As a method of obtaining the antistatic mixed fiber false twisted yarn of the present invention, the unstretched yarn of the polyester yarn A and the polyester yarn B is simultaneously entangled and twisted, and then untwisted to alternately braided yarn and Can be obtained.

  As a combination of two or more types of filament yarns in the present invention, a yarn that can be drawn and twisted at least 1.2 times is used for a yarn having a low elongation, and a yarn having a high elongation is the elongation. It is preferable to use a yarn that can be stretched by 40% or more than a small yarn.

  The elongation of the polyester yarn A with low elongation is 50% or more, preferably 60% or more. The elongation of the polyester yarn B with high elongation is preferably 100% or more, and low elongation. The difference in elongation between the yarn and the high elongation yarn is 20% or more, preferably 40% or more, more preferably 50% or more. More preferably, it is 50 to 70%. Here, if the difference in elongation is less than 20%, the bulkiness of the false twisted yarn cannot be obtained, which is not preferable. Here, the elongation of the polyester yarn A and the polyester yarn B can be adjusted by a known method, and it is preferable to adjust the draw ratio and the like.

  Further, the ratio of the polyester yarn A and the polyester yarn B can be appropriately selected and set according to the purpose, but it is preferable that each of them is 20% or more, and the usage ratio of both is polyester yarn A: polyester yarn B = 25. : 75-75: 25 (weight) is preferable. In particular, it is preferable that the ratio of the polyester B having a high elongation is large, and the ratio of (polyester yarn A) / (polyester yarn B) is preferably in the range of 30/70 to 45/55.

  By taking the above configuration, polyester yarn B is preferentially drawn in the mixed fiber false twisting process, and polyester yarn A is less damaged and less broken and fluffed. Is also covered with the polyester yarn B, so that problems in the subsequent fabric forming process are reduced.

  Furthermore, other fibers, for example, metal-plated fibers or carbon particle-containing fibers may be combined to give conductivity within a range that does not impair the object of the present invention, but when other fibers are used in combination, the ratio is If it is not made 30% or less of the whole, the bulkiness tends to decrease, which is not preferable.

  In the present invention, it is preferable that two or more kinds of undrawn yarns having different elongations are aligned and subjected to an air entanglement treatment through an air jet nozzle before drawing. As the air injection method, any method such as a method in which the traveling yarn is applied in a direction perpendicular to the traveling yarn and a method in which the traveling yarn is applied in the traveling direction can be employed. Since a product with a relatively soft texture can be obtained, it may be selected appropriately according to the purpose. However, in the entanglement process, if the overfeed rate is excessively increased, a large number of loops are generated and the process stability during the production of the fabric is impaired. In addition, you may provide an overfeed rate difference between undrawn yarns with different elongations. In this case, too many differences will cause many loops, so the same overfeed rate is usually adopted. Is done.

As the false twisting device, any of a spindle attached to a twist pin, a fluid type air false twisting nozzle, an internal or external friction false twisting device, and a belt rubbing device can be applied.
This embodiment will be described with reference to FIG. 1. Two yarns 3 and 3 ′ having different elongations are combined by a guide 4 and then supplied to a tangling air injection nozzle 7 through a tension adjusting device 5 and a feed roller 6. Here, an entangled yarn having an entanglement point of 13 / m or more is obtained. Next, the entangled yarn is supplied to the drawn false twisting zone by the first deliberry roller 8, passed through the heater 9, the false twisting tool 10, taken up by the second deliberry roller 11, and then scraped off as cheese 13.

  Here, when heat treatment is performed with a heater while applying overfeeding after confounding, the polyester yarn B contracts, and the polyester yarn A hardly contracts or self-extends, and there is a difference in the length between the polyester yarn A and the polyester yarn B. Occurs, which leads to swelling and span-like properties when used as a fabric.

  The antistatic mixed fiber false twisted yarn of the present invention will be described with reference to the drawings. FIG. 2 is a side view of the false twisted yarn of the present invention. In FIG. 2, I indicates an alternating twisted winding portion, II indicates an entangled portion, and III indicates a spread portion.

  The antistatic mixed fiber false twisted yarn of the present invention has a converging portion (X) and an opening portion composed of alternating twisted yarn winding portions (I) and entangled portions (II) as shown in FIG. 2 in the longitudinal direction. It is important that the portions (III) are alternately formed.

  In the converging portion (X) of the present invention, the alternating twisted yarn winding portion (I) has the core portion mainly made of the polyester yarn A and the outer layer portion mainly made of the polyester yarn B being wound in a substantially converging state. Part. Further, the entangled portion (II) is a portion where the polyester yarn A and the polyester yarn B are closely entangled in a mixed fiber state. Hereinafter, in the present invention, the converging portion is combined with (I) and (II). (X).

In such a converging portion (X), the entangled portion (II) has a large second moment of section because the entire yarn is tightened, and can impart high repulsion to the finally obtained fabric.
On the other hand, the alternate twisted-winding portion (I) is a portion having a bulge as compared with the entangled portion (II), and can exhibit elasticity against pressing and imparts a texture such as tension and waist to the fabric. I can do it.

  On the other hand, the opening portion (III) adjacent to the converging portion (X) is a continuous reversal yarn with the core portion mainly composed of the polyester yarn A mainly separated from the polyester yarn B individually. It is a portion that is covered in a state substantially parallel to the shaft, and can provide the fabric with spun-like bulkiness and softness that are insufficient in the converging portion.

  The apparent single fiber fineness of the antistatic mixed fiber false-twisted yarn of the present invention (thickness having an average thickness in the length direction) and the total fineness as the yarn are not particularly limited, The single fiber fineness is suitably 1.5 to 5.0 dtex, and the total fineness is suitably 30 to 300 dtex.

  The fineness of the undrawn yarn and the partially oriented yarn should be selected according to the application. In general, it is preferable that the total fineness is brazed yarn ≧ core yarn, the former being 30 to 400 dtex and the latter being 20 to 150 dtex. Is particularly preferred.

  Moreover, the yarn length difference between the polyester yarn A and the polyester yarn B of the antistatic mixed fiber false twisted yarn of the present invention is 5 to 20%, more preferably 10 to 15%. It is preferable in obtaining.

  In order to produce a fabric using the antistatic mixed fiber false twisted yarn of the present invention described above, an appropriate twist may be applied as necessary and woven or knitted into a desired structure. The resulting fabric exhibits anti-static performance that was not achievable with conventional woven and knitted fabrics, and has a spun-like bulkiness, a soft surface with a soft touch and waist, and a repellent texture. This is preferable.

Hereinafter, the present invention will be described more specifically with reference to examples. In addition, each measurement item in an Example was measured with the following method.
Fiber elongation:
It measured based on the method of JISL-1013 description.
Bulkiness evaluation:
The bulkiness was evaluated according to the following measurement method. In other words, a composite patch is taken for 120 revolutions with a measuring instrument (circumferential length: 1.125 m) to make a cocoon, and a load three times the weight of the cocoon is hung on one end of a sample folded in half. Heat treatment was performed at 195 ° C. for 5 minutes, followed by cooling. Next, the yarn is filled into a box (height 2.5 cm, width 1.0 cm, length 10 cm, bottom surface radius 0.5 cm) and a lid (three times the weight of the heel) is loaded, and the volume at that time It was calculated by the following formula from (Vcm ³ ) and the weight (Wg) of the folds (mixed yarn).
Bulkiness (cm ³ / g) = V / W
When this value is 50 or more, the bulkiness is “good”, and when it is less than 50, it is “bad”.
Frictional band voltage:
While rotating the test piece, the test piece is rubbed with a friction cloth and the generated charged voltage is measured.
Conforms to L1094 electrification test method B (friction band voltage measurement method).
Regarding the antistatic effect, the frictional voltage is about 2000 V or less (preferably 1500 V or less).
Then, the antistatic effect is produced.
Feeling evaluation: Comprehensive flexibility, dry feeling, and feeling of feeling outside of the spanize. Each evaluation item about the feeling is a sensory evaluation by five experienced panelists, and all the members judged to be extremely good (○), 3 Those that were judged good by more than one person were ranked in three stages, (△), and those judged by three or more people as bad (×).
Yarn length difference: calculated by the following formula.
Yarn length difference (%) = (L _S −L _C ) / L _C × 100
(However, L _S and L _C represent the average values of the total single fiber lengths of the polyester yarn A and the polyester yarn B contained in the mixed yarn cut into 5 cm at an arbitrary position.)
Crimp rate:
A false twisted yarn sample was applied with a tension of 0.044 cN / dtex and wound on a cassette frame to produce a cassette of about 3300 dtex. Two loads of 0.0177 cN / dtex and 0.177 cN / dtex were applied to one end of the cassette, and the length S0 (cm) after 1 minute was measured. Subsequently, it was treated in boiling water at 100 ° C. for 20 minutes with the load of 0.177 cN / dtex removed. Remove the load of 0.0177 cN / dtex after boiling water treatment, let it dry naturally for 24 hours, load 0.0177 cN / dtex and 0.177 cN / dtex again, and adjust the length after 1 minute. Measurement was made S1 (cm). Next, the load of 0.177 cN / dtex was removed, the length after 1 minute was measured and set to S2, and the crimp rate was calculated by the following formula, and expressed as the average value of 10 measurements.
Crimp rate (%) = [(S1-S2) / S0] × 100

（ただし、ｊは１８〜２８の整数で平均２１、Ｐは平均値として１００、ｍは平均値として５である）
で表される水不溶性ポリオキシエチレン系ポリエーテルを４部及びドデシルベンゼンスルホン酸ナトリウムを２部、真空下で添加し、さらに２４０分間重縮合反応せしめ、次いで酸化防止剤としてチバカイギー社製イルガノックス１０１０を０．４部真空下で添加し、その後さらに３０分間重縮合反応を行なった。得られたポリマーの固有粘度は０．６５７、軟化点２５８℃であった。 [Example 1]
(Creation of polyester yarn A)
100 parts of dimethyl terephthalate, 60 parts of ethylene glycol, 0.06 part of calcium acetate monohydrate (0.066 mol% with respect to dimethyl terephthalate) and 0.013 part of cobalt acetate tetrahydrate as a color adjuster (terephthalic acid) 0.01 mol% with respect to dimethyl) was charged into a transesterification reactor, and the reaction product was heated from 140 ° C. to 220 ° C. over 4 hours under a nitrogen gas atmosphere. The ester exchange reaction was carried out while distilling out. After completion of the transesterification reaction, 0.058 parts of trimethyl phosphate (0.080 mol% with respect to dimethyl terephthalate) as a stabilizer and 0.024 parts of dimethylpolysiloxane as an antifoaming agent were added to the reaction mixture. Next, after 10 minutes, 0.041 part of antimony trioxide (0.027 mol% with respect to dimethyl terephthalate) was added to the reaction mixture, and the temperature was raised to 240 ° C. while distilling off excess ethylene glycol. Thereafter, the reaction mixture was transferred to a polymerization reactor. Next, after reducing the pressure from 760 mmHg to 1 mmHg over 1 hour and 40 minutes and raising the temperature from 240 ° C. to 280 ° C. to cause the polycondensation reaction,
(Creation of core component polyester)
The following formula (4) as a polyoxyalkylene polyether as an antistatic agent

(Where j is an integer of 18 to 28, average 21; P is 100 as an average value; m is 5 as an average value)
4 parts of water-insoluble polyoxyethylene-based polyether and 2 parts of sodium dodecylbenzenesulfonate were added under vacuum, followed by a polycondensation reaction for 240 minutes, and then Irganox 1010 manufactured by Ciba Kaigie Co., Ltd. as an antioxidant. Was added under a vacuum of 0.4 parts, followed by a polycondensation reaction for another 30 minutes. The obtained polymer had an intrinsic viscosity of 0.657 and a softening point of 258 ° C.

(Creation of sheath component polyester)
A polyester to which the antistatic agent was not added was used as a sheath component polyester, and was chipped by a conventional method.

(Made of polyester yarn A)
The yarn production was performed as follows. The dried polymer was melted in a usual manner in a spinning facility, and supplied to a two-component composite spinning head via a gear pump. The ratio of the core component and the sheath component polymer created above was set to the values shown in Table 1. The molten polymer of the core component and sheath component supplied at the same time is cooled and solidified with cooling air from a normal cross-flow type spinning cylinder from a spinneret having 36 circular composite spinning holes with a nozzle hole diameter of 0.25 mm. Then, it was bundled as one yarn while applying a spinning oil agent, and was taken up at a speed of 3000 m / min to obtain an unstretched polyester yarn A multifilament of 120 dtex / 36 filaments. The obtained yarn characteristics are shown in Table 1.

(Made of polyester yarn B)
On the other hand, polyethylene terephthalate having an intrinsic viscosity of 0.64 is melted and discharged from a spinneret, and after the discharged yarn is cooled and solidified, an oil agent is applied, taken at a speed of 1000 m / min, and a 150 dtex / 48 filament portion. An oriented unstretched polyester yarn B was obtained.
The obtained unstretched polyester yarn A and partially oriented polyester yarn B were unwound and aligned, and entanglement treatment and stretch false twisting were performed in the step of FIG.

  That is, the two yarns are supplied to the feed roller 6 and interlaced with the first delivery roller 8 by the interlace nozzle 7 at an overfeed rate of 3.0% and a pneumatic pressure of 0.25 MPa. / M entangled, and subsequently supplied to the false twisting zone via the roller 8, wound in a winder at a draw ratio of 1.5 times, a heater temperature of 450 ° C. and a yarn speed of 550 m / min, of 190 dtex / 84 filament A false twisted yarn was obtained.

When the obtained false twisted yarn was observed with a microscope, the structure shown in FIG. 2 [structure formed in the order of alternating twisted yarn winding portion (I) -entangled portion (II) -opened portion (III) ].
The obtained yarn was used for warp and weft and was woven in double feathers, and scouring, heat setting and dyeing were performed according to a conventional method to obtain a plain dyed fabric. The evaluation results are shown in Table 1.

Also,
[Comparative Example 1] The same procedure as in Example 1 was performed except for the conditions shown in Table 1.
[Comparative Example 2] The same procedure as in Example 1 was performed except for the conditions shown in Table 1.
[Comparative Example 3] The same procedure as in Example 1 was performed except for the conditions shown in Table 1.
[Comparative Example 4] The same procedure as in Example 1 was performed except for the conditions shown in Table 1.
[Comparative Example 5] Operations were carried out in the same manner as in Example 1 except for the conditions shown in Table 1.

  In applications such as school uniforms, uniforms, dust-proof clothing, etc. that suppress static electricity, or in blouse and shirts that often come into direct contact with the skin

3, 3 ': raw yarn 4: guide 5: tension device 6: feed roller 7: interlace nozzle 8: first delivery roller 9: heater 10: false twister,
11: 2nd delivery roller 12: Winding roller 13: Winding cheese I: Alternating twisted winding part II: Entangling part X: Converging part III: Opening part

Claims (2)

Two types of polyester yarns having different elongations are polyester mixed false twisted yarns formed by alternately forming a converging portion consisting of alternating twisted-wound winding portions and entangled portions and opening portions in the longitudinal direction. An antistatic polyester blended false twisted yarn characterized by satisfying the following requirements:
1) Polyester yarn A having low elongation is a core-sheath type composite yarn, and the core is a polystatic compound represented by the following formula (1) as an antistatic agent with respect to 100 parts by weight of aromatic polyester. It comprises an antistatic polyester comprising 0.2 to 30 parts by weight of an oxyalkylene polyether and (b) 0.05 to 10 parts by weight of an organic ionic compound substantially nonreactive with the polyester.
2) The polyester yarn B having a high degree of elongation is made of a polyester containing 0 to 10 wt% of a matting agent with respect to 100 parts by weight of the aromatic polyester.
3) The polyester yarn A has a two-layer structure in which a core portion of false twisted yarn is formed, and the polyester yarn B surrounds the core portion in an alternately twisted yarn shape to form an outer layer portion (sheath portion).
4) The yarn must be false twisted so that the difference in elongation between the polyester yarn A and the polyester yarn B is 20% or more.
^{_{Z - [(CH 2 CH 2}} O) n (R 1 O) m-R 2] k equation (1)
[Wherein, 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, having 1 to 40 carbon atoms. A monovalent hydrocarbon group, a monovalent hydroxy hydrocarbon 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, and n is n ≧ 70 / k. Satisfied integer, m is an integer of 1 or more] The antistatic polyester mixed fiber false twisted yarn according to claim 1, which satisfies the following conditions (1) to (5).
1) The frictional voltage of the antistatic polyester mixed fiber false twisted yarn is 2000 V or less.
2) The ratio of the core area to the sheath area in the cross section orthogonal to the fiber axis of the polyester yarn A is in the range of 5:95 to 80:20.
3) The strength of the antistatic polyester blended false twisted yarn is 1.5 cN / dtex or more.
4) The crimp rate of the antistatic polyester mixed fiber false twisted yarn is 2 to 8%.
5) The average yarn length of the polyester yarn B in the antistatic polyester mixed fiber false twisted yarn is 10 to 20% longer than the average yarn length of the polyester yarn A.

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