JP2010196178A - Ultrafine blended yarn having antistaticity and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ultrafine polyester blended yarn having excellent antistaticity and suitable for a soft and high-repulsion worsted-like woven fabric having wool-like touch. <P>SOLUTION: The antistatic ultrafine polyester blended yarn is constituted of a polyester multifilament yarn A of a core-sheath-type conjugate yarn in which the core part is formed of a polyester (a) containing a specific antistatic agent in a specified amount, and the sheath part is formed of a polyester (b) containing a matting agent of 0-10 wt.%, and which has a fineness of ≤1.5 dtex, and a heat-shrinkable polyester multifilament yarn B. The polyester blended yarn is obtained by interlacing the multifilament yarns A and B by overfeeding them to an interlacing nozzle, subjecting the interlaced yarn to relax heat treatment to spontaneously elongate the polyester multifilament yarn, and further subjecting the obtained yarn to second relax heat treatment. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an ultrafine polyester blended yarn having antistatic properties, which is suitable for an eyelash-like woven fabric having a highly repellent wool-like feel.

  The blended yarn of the spontaneously stretchable polyester multifilament yarn that elongates by heat treatment and the heat-shrinkable polyester multifilament yarn that shrinks by heat treatment becomes bulky by heat treatment, and a soft and flexible texture is obtained. As a starting point, it has become widely used.

  In order to produce such polyester blended yarns, the self-extensible polyester multifilament yarns and heat-shrinkable polyester multifilament yarns that are separately prepared are mixed with an air jet nozzle or subjected to relaxation heat treatment. While the polyester multifilament yarn that becomes spontaneously stretchable by relaxation heat treatment, the heat-shrinkable polyester multifilament yarn is continuously supplied to the spontaneously stretchable polyester multifilament yarn after the relaxation heat treatment and mixed by an air jet nozzle. A method of fiber finishing (for example, JP-A-1-250425) is used.

  Furthermore, when used for a woolen-like fabric having a high repellent wool-like touch, a non-contact heater such as a slit heater or a pipe heater is used at a high temperature on the spontaneously stretchable polyester multifilament yarn after the relaxation heat treatment. A second relaxation heat treatment is performed, and then mixed with a heat-shrinkable polyester multifilament yarn. (JP-A-8-325878, JP-A-6-316828, JP-2007-009373)

  However, there is a need for ultra-fine mixed yarns for further softness improvement and tactile sensation, and particularly excellent anti-static properties without crackling noise and discomfort during wearing in winter. It has been. However, in the present situation, mixed yarns having an extremely fine single yarn fineness and containing a large amount of an antistatic agent are not prone to fluff and breakage.

JP-A-1-250425 JP-A-8-325878 JP-A-6-316828 JP 2007-009373 A

  The present invention provides an ultra-fine polyester blended yarn excellent in antistatic property, soft and highly repellent, and suitable for a woolen-like fabric having a wool-like touch, and a fabric including the same.

  As a result of repeated studies to solve the above-mentioned problems, the present inventors have entangled a self-extensible core-sheath type polyester multifilament yarn containing a specific amount of an ultrafine and antistatic agent with a heat-shrinkable polyester multifilament yarn. Later, it was found that a high-resilience wool-like, soft, highly antistatic ultra-fine mixed yarn with a soft resilience can be produced with less fluff and breakage by spontaneously stretching by relaxation heat treatment and further relaxation heat treatment. It came to complete.

That is, according to the present invention,
A polyester multifilament yarn A, which is a core-sheath type composite fiber, the core part of which is formed of antistatic polyester a, and the sheath part of which is formed of polyester b containing 0 to 10 wt% of a matting agent; A polyester mixed yarn comprising the filament yarn B and satisfying the following conditions (1) to (7).
(1) The single yarn fineness of the polyester multifilament yarn A is 1.5 dtex or less.
(2) The ratio A: B of the polyester multifilament yarn A core area A and sheath area B is in the range of 5:95 to 80:20.
(3) The friction band voltage of the blended yarn is 2000 V or less.
(4) The confounding treatment step and the relaxation heat treatment step are obtained through the order.
(5) The mixing ratio of polyester multifilament A and polyester multifilament B is 8-6: 2-4.
(6) Antistatic polyester a is used as an antistatic agent with respect to 100 parts by weight of aromatic polyester.
(A) 0.2 to 30 parts by weight of a polyoxyalkylene polyether represented by the following general formula (1) and (b) an organic ionic compound 0.05 to 10 substantially non-reactive with the polyester Antistatic polyester comprising parts by weight.
^{_{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]
(7) The polyester multifilament A constitutes the outer layer portion of the mixed yarn, and the polyester multifilament B constitutes the inner layer portion.
Is provided.

  Here, the relaxation heat treatment is preferably performed on a heating roller having a first stage of 100 to 130 ° C., and polyester multifilament yarn A ′ (spontaneous elongation by relaxation heat treatment to become polyester multifilament A) and polyester multifilament yarn B '(heat-shrinked to become polyester multifilament B) are fed together and supplied to the interlace nozzle at an overfeed rate of 1.0 to 1.5%, and entanglement of 60 to 70 / m is given. Thereafter, it is preferable that the second stage relaxation heat treatment is performed at 220 to 240 ° C. with an overfeed rate of 1.5 to 2.0%. The polyester multifilament yarn A ′ is a polyester unstretched yarn spun at a speed of 2000 to 5000 m / min, and the polyester multifilament yarn B ′ is made of polyester obtained by copolymerizing 5 to 15 mol% of isophthalic acid as a third component. A preferred embodiment is a polyester multifilament drawn yarn having a boiling water shrinkage of 10 to 16%.

The blended yarn of the present invention contains an antistatic agent, and the polyester multifilament yarn A ′ having an ultrafineness of 1.5 dtex or less self-extends by relaxation heat treatment, and the polyester multifilament B ′ heat shrinks. The filament yarn A is arranged on the outer side of the mixed yarn and the polyester multifilament yarn B is arranged on the inner side. Even if the yarn has an extremely fineness of 1.5 dtex or less, it is a relaxation heat treatment step, so that the fiber fluff Generation and breakage are greatly reduced, and the process yield is greatly improved.
When the polyester mixed yarn of the present invention is used, a fabric having a soft feeling and a feeling of swelling can be obtained.

Schematic of the apparatus for manufacturing the polyester mixed yarn of this 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 the polymer chain unit, and is obtained by reacting a bifunctional aromatic carboxylic acid or its ester-forming derivative with a diol or its ester-forming derivative. It is intended to be a polymer.

  Examples of the bifunctional aromatic carboxylic acid herein 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 polyoxyalkylene polyether which is an antistatic agent blended in the antistatic polyester a used in the core of the polyester multifilament A, which is one component of the mixed yarn of the present invention, is substantially insoluble in the polyester. As long as it is a polyoxyalkylene glycol composed of a single oxyalkylene unit or a copolymerized polyoxyalkylene glycol composed of two or more oxyalkylene units, and the following general formula (1) ,
^{_{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. A satisfactory integer, m is an integer of 1 or more] is preferred.

  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.

  The compounding amount of the polyoxyalkylene polyether compound is in the range of 0.2 to 15 parts by weight with respect to 100 parts by weight of the 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, when the amount exceeds 15 parts by weight, fluff is likely to occur, and the polyether is likely to bleed out, resulting in a decrease in yarn-making stability. More preferably, it is 0.5-10 weight%, More preferably, it is 1.0-7 weight%.

Examples of the organic ionic compound that is another antistatic agent to be blended with the antistatic polyester A include sulfonic acid metal salts and sulfonic acid quaternary phosphonium salts represented by the following general formulas (2) and (3). It can mention as a preferable thing.
RSO ₃ M ...... Formula (2)
In the formula, 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. Preferred examples 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, sodium dodecyl benzene 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 preferably an alkyl group or an aryl group, particularly a lower alkyl group, a phenyl group or a benzyl group. .

  Such sulfonic acid quaternary phosphonium salts may be used alone or in combination of two or more. 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.

  The above organic ionic compounds may be used alone or in combination of two or more, and the blending amount is preferably in the range of 0.05 to 8 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 8 parts by weight, the mechanical properties of the composition are impaired, and the ionic compound also tends to bleed out. This reduces the ruder biteability of the chip, and deteriorates the yarn-making stability. Preferably it is 1.0 to 5.0 weight%, More preferably, it is 1.0 to 3.0 weight%.

  In addition, in the polyester b used for the sheath part of the polyester multifilament A, the well-known matting agent is mix | blended in the range which does not inhibit the objective of this invention. If the matting agent exceeds 10 wt%, the spinnability of the undrawn yarn that becomes the parent yarn of the present invention is deteriorated, so the range is preferably 0 to 10 wt%.

  Furthermore, the area ratio of the polyester a and the polyester b in the core / sheath portion in the cross section of the polyester multifilament yarn A needs to be in the range of 5:95 to 80:20. When the area ratio is less than 5:95, the expression of the antistatic performance by the polyester a becomes insufficient. When the area ratio is larger than 80:20, when the alkali weight loss of 10% or more is applied, The antistatic polyester is eluted, the antistatic performance is lowered and the strength of the drawn yarn is reduced to 3.0 cN / dtex or less, and the strength when used as a fabric is insufficient. This is not suitable for the purpose of use and is not preferable because the use is limited.

  Further, the aromatic polyester of the core and sheath of the antistatic polyester fiber of the present invention may be blended with an antioxidant, a heat stabilizer, an ultraviolet absorber, etc., and it is preferable to do so. is there. In addition, you may mix | blend a flame retardant, a fluorescent whitening agent, the matting 1 coloring agent, an inert fine particle, and other arbitrary additives as needed.

  Antioxidant suppresses thermal decomposition of the polyoxyethylene-based polyether polymer due to high temperature, low discharge speed, and long-term residence in fiber melt spinning process, etc. It is possible to prevent the deterioration of the property. The antioxidant used in the present invention is not limited as long as it has antioxidant ability.

  Preferable antioxidants used in the present invention include hindered phenol compounds, thiopropionate compounds, phosphite compounds, etc. Even if only one kind is used alone, two or more kinds may be mixed. May be used. Moreover, it is preferable that the compounding quantity of antioxidant exists in the range of 0.02 to 3 weight% with respect to aromatic polyester. When the blending amount is less than 0.02% by weight, the thermal decomposition inhibiting effect on the polyoxyethylene-based polyether polymer is insufficient, and even if it is more than 3% by weight, the thermal decomposition is inhibited. The effect is saturated and no further improvement is observed, and the mechanical properties of the resulting fiber, such as two hues, are impaired.

  In order to produce the antistatic polyester a used in the present invention, a water-insoluble polyoxyethylene polyether, an organic ionic compound, and, if necessary, an antioxidant are blended with an aromatic polyester. Depending on the method, the above components can be blended into the aromatic polyester simultaneously or in any order. That is, for example, before the start of the polycondensation reaction of the aromatic polyester, during the polycondensation reaction, at the end of the polycondensation reaction, and when it is still in the molten state, in the granular state, or in the spinning stage, Each may be melt-mixed in advance and added in a single operation, or may be added in two or more portions. Each additive component is separately blended with the aromatic polyester before being spun, etc. May be mixed. Furthermore, when an additional component is added before the middle stage of the polycondensation reaction, it may be added after being dissolved or dispersed in a solvent such as glycol.

  In addition, the cross-sectional shape of the outer periphery of the polyester multifilament yarn A and the shape of the figure formed by the core take an arbitrary shape depending on the purpose of the knitted or knitted fabric such as electrical properties, tension, waist, texture, and gloss. For example, in addition to a circular cross section, a triangle, a flat, a square, a triangle, a star, a hexagon, a boomerang, and the like can be exemplified. Also, the core part and the sheath part do not have to be concentric, the center of the core may be offset, and the cross-sectional shape of the outer periphery and the shape of the figure formed by the core part are the same shape. Or different shapes.

  Further, as the polyester multifilament yarn A ′, a conventionally known composite spinning device is used, the polyester b described above on the sheath side, the water-insoluble polyoxyethylene polyether, the organic and / or inorganic ionic compound on the core, And, if necessary, intermediate orientation obtained by melt spinning at a speed of 2000 to 3000 m / min using an antistatic polyester a blended with at least one of the above-mentioned antioxidants such as phosphite and stretching. Yarn (POY) or low magnification drawn yarn is preferred.

  That is, as the polyester multifilament yarn A ′, a polyester undrawn yarn (usually called intermediately oriented yarn POY) obtained by spinning at a relatively high spinning speed of about 2000 to 5000 m / min, or a spinning speed of around 1000 m / min. A low-orientation polyester unstretched yarn or an intermediate-oriented yarn spun at <1> and stretched at a low magnification is used.

The relaxation heat treatment is preferably performed in two stages. The first stage is preferably performed on a heating roller of 100 to 130 ° C., and the second stage relaxation heat treatment is preferably performed at 220 to 240 ° C. with an overfeed rate of 1.5 to 2.0%.
Usually, the polyester multifilament A ′ is spontaneously stretched by the first-stage relaxation heat treatment, and the spontaneously stretched form is fixed by the second-stage relaxation heat treatment.

  On the other hand, as the polyester multifilament yarn B ′, a polyester multifilament drawn yarn having a boiling water shrinkage of 8.0% or more is preferably used, and more preferably a polyester multifilament drawn yarn having a boiling water shrinkage of 10 to 16%. Used. Preferred examples of the polyester multifilament include a polyester multifilament drawn yarn that has not been heat-set, and a multifilament drawn yarn made of polyester obtained by copolymerizing, for example, about 5 to 15 mol% of isophthalic acid as the third component. it can.

  The fineness of the polyester multifilament yarn B is preferably 2 to 10 dtex. If it is less than 2 dtex, the strength of the mixed yarn is lowered, and if it exceeds 10 dtex, the texture becomes hard, which is not preferable.

  FIG. 1 is a schematic front view showing an example of an apparatus for producing a blended yarn of the present invention, a polyester multifilament yarn A ′ that spontaneously stretches by performing a relaxation heat treatment, and a polyester multifilament yarn B ′. Are interlaced under overfeed by an interlace nozzle 3 provided between the supply roll 1 and the first take-up roll (heating roll) 2.

  In this apparatus, since the first take-up roll 2 is heated and the polyester multifilament yarns A ′ and B ′ are overfeeded between the supply roll 1 and the first take-up roll 2, the first take-up roll 2 is used. The polyester multifilament A ′ wound around the roll 2 is relaxed and heat-treated on the roll and then spontaneously stretched. Next, the non-contact heater 5 provided between the first take-up roll 2 and the second take-up roll 4 The loosened heat treatment of No. 2 is performed to heat-fix the mixed fiber and wind it around the package 6.

  When the polyester multifilament yarn A ′ and the polyester multifilament yarn B ′ are entangled, it is preferable to use an interlace of 60 to 70 pieces / m. For this purpose, the overfeed rate is usually 1.0 to 1.5%. Is preferable.

  Also, as in the above example, it is preferable to heat the first take-up roll 2 and perform a relaxation heat treatment for spontaneous extension on the first take-up roll 2 because the device becomes compact, but suitable for entanglement with the interlace nozzle 3 When the overfeed rate (relaxation rate) required for spontaneous elongation by relaxation heat treatment is larger than the overfeed rate, a take-up roll is further provided on the downstream side of the first take-up roll 2, and the take-up roll A predetermined relaxation heat treatment may be performed between the two. Further, when the first take-up roll 2 is a heating roll, the diameter on the yarn exit side is made smaller than the diameter on the yarn entry side of the roll 2 and a predetermined overfeed rate (relaxation rate) on the roll. You may make it heat-process with.

  The temperature and the overfeed rate (relaxation rate) of the relaxation heat treatment for spontaneously stretching the polyester multifilament yarn A ′ vary depending on the type of yarn used for the polyester multifilament yarn A ′. For example, 3000 to 3500 m / min. When using the intermediate oriented yarn (POY) spun at a spinning speed of 1 and taking heat treatment on the first take-up roll (heating roll) 2, the roll surface temperature is 100 to 130 ° C. and the overfeed rate (relaxation rate) is 1. It is preferable to set it as 0.0 to 1.5%.

  The second-stage relaxation heat treatment by the non-contact heater 5 is a heat setting treatment for imparting characteristics suitable for a highly repellent wool-like touched woven fabric to the blended yarn of the present invention, The treatment is preferably performed at 220 ° C. to 240 ° C. with an overfeed rate of 1.5 to 2.0%, and the treatment time is usually 0.01 to 0.30 seconds. The boiling water shrinkage of the obtained polyester mixed yarn is usually about 5 to 13%. As the non-contact heater 5, a slit heater, a pipe heater or the like can be used.

  In the blended yarn of the present invention, the polyester multifilament yarn A ′ and the polyester multifilament yarn B ′ that spontaneously stretch by relaxation heat treatment are entangled, and then the relaxation treatment is performed to spontaneously stretch the multifilament yarn A ′. The polyester multifilament B ′ is preferably heat-shrinked, so that the yarn does not come into contact with the non-contact heater 5 during the second relaxation heat treatment, and the polyester mixed yarn reduces the occurrence of yarn breakage. Thus, it becomes possible to manufacture stably. In the method of producing a polyester mixed yarn by making the polyester multifilament yarn A ′ alone relaxed and thermally stretched, heat-fixed by the second stage relaxation heat treatment and entangled with the polyester multifilament yarn B, When the second relaxation heat treatment is performed by the contact heater, the yarn contacts the non-contact heater and the yarn breakage increases, which is inappropriate.

  In the polyester blended yarn of the present invention, the polyester multifilament yarn A having a single yarn fineness of 1.5 dtex or less and containing an antistatic agent is located relatively outside the blended yarn, and the polyester multifilament yarn B Is relatively located inside the blended yarn, and the blending ratio (weight ratio) of the polyester multifilament yarn A and the polyester multifilament yarn B is 8 by weight from the viewpoint of deep color and swelling. It is preferable that it exists in the range of 2-5: 5. Preferably it is 8-6: 2-4. Within this range, the tactile sensation, texture, soft feeling, strength, etc. are balanced, and when made into a fabric, it has good softness, resilience, and feel.

  Further, the obtained mixed yarn of the present invention or a woven or knitted fabric produced from this fiber is heat-treated at a temperature of 100 ° C. or more, to stabilize the structure and to contain a polyoxyethylene-based polyether contained in the fiber, and It is also preferable to promote suitable arrangement by migration of various additives contained as necessary. Furthermore, sag heat treatment can be used in combination as required.

  If necessary, the antistatic polyester blended yarn of the present invention or a woven or knitted fabric produced from this fiber may be subjected to an appropriate post-hydrophilic treatment, and it is preferable to do so. As the post-hydrophilic treatment, for example, a method of treating with an aqueous dispersion of a polyester polyether block copolymer comprising terephthalic acid and / or isophthalic acid or their lower alkyl ester, lower alkylene glycol, and polyalkylene glycol. Alternatively, a method in which a hydrophilic monomer such as acrylic acid or methacrylic acid is graft polymerized and then sodium chloride is used can be preferably employed.

  The antistatic property of the mixed fiber of the present invention requires that the frictional voltage is 2000 V or less. If it is 2000V or more, generation | occurrence | production of static electricity will be large and will feel discomfort at the time of wear, and it is unpreferable also on safety.

(1) Intrinsic viscosity Dissolved in ortho-chlorophenol and measured at 35 ° C using an Ubbelohde viscosity tube.
(2) Yarn strength and elongation Measured according to JIS L-1013-75.
(3) Number of fluffs Using a DT-104 type fluff counter device manufactured by Toray Industries, Inc., a polyester stretched yarn sample was continuously measured at a speed of 500 m / min for 20 minutes to measure the number of fluffs, and the sample length was 10,000 m. Expressed in the number of hits.
(4) Texture of the fabric The mixed yarn was woven into a plain fabric of warp 60 / cm and weft 35 / cm, and the texture after dyeing was evaluated.
(Soft feeling)
Level 1: Soft and supple feel Level 2: Slightly soft feeling but repellent feel Level 3: Crispy or hard feel
(5) Chargeability test method B method (friction charging voltage measurement method)
After knitting, dyeing, and conditioning the mixed fiber yarn of the present invention, the test piece is charged in a corona discharge field, then rubbed with a friction cloth while rotating the test piece, and the generated charged voltage is measured. .
Conforms to L1094 electrification test method B (friction band voltage measurement method).
Regarding the antistatic effect, if the frictional voltage is about 2000 V or less (preferably 1500 V or less), the antistatic effect is exhibited.

[Example 1]
(Creation of polyester 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 carry out the polycondensation reaction, the polyoxyalkylene polyether is represented by the following formula (4) as an antistatic agent. 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 Kaigi Co., Ltd. was added as an antioxidant. 4 parts were added under vacuum, followed by a polycondensation reaction for another 30 minutes. In the polymerization reaction step, an antistatic agent was added, and the obtained polymer had an intrinsic viscosity of 0.657 and a softening point of 258 ° C.

（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）

(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)

(Creation of polyester b)
A polyester b was added to which no antistatic agent was added, and chips were formed by a conventional method.

(Yarn making)
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 between the core and the sheath polymer was set to be core / sheath = 30/70. The molten polymer in the core and the sheath supplied simultaneously is cooled and solidified by cooling air from a normal cross-flow type spinning cylinder from a spinneret having 72 circular composite spinning holes having a nozzle hole diameter of 0.25 mm. The yarn is bundled as a single yarn while applying a spinning oil agent, taken up at a speed of 3000 m / min, and a polyester intermediate orientation yarn (POY) of 90 dtex / 72 filament (single fiber fineness: 1.25 dtex) (polyester multifilament yarn A). ') Got.

  On the other hand, an undrawn yarn obtained by melting polyethylene terephthalate isophthalate copolymer polyester having an intrinsic viscosity of 0.64 (copolymerization of 10.0 mol% of isophthalic acid) at 280 ° C. and spinning at a spinning speed of 1450 m / min. The film was drawn 2.9 times at 0 ° C. to obtain a heat-shrinkable polyester yarn (heat-shrinkable polyester multifilament yarn B ′) having a boiling water shrinkage of 15% and 55 dtex / 12 filament (single fiber fineness: 4.6 dtex). .

Using the polyester multifilament yarn A ′ and the heat-shrinkable polyester multifilament yarn B ′, a polyester mixed yarn was produced using the apparatus shown in FIG. That is, both polyester multifilament yarns A ′ and B ′ are aligned, and the interlace nozzle 3 provided between the supply roll 1 and the first take-up roll 2 (heating roll having a surface temperature of 120 ° C.) 2 is 600 m / min. At an overfeed rate of 1.2% and entangled with 2.0 kg / cm ² of compressed air to give an interlace of 65 / m. The mixing ratio of the polyester multifilament yarn A ′ and the polyester multifilament B ′ was 62:38.

  Next, with the overfeed rate of 1.2%, the yarn is wound eight times on the heating roll 2 having a surface temperature of 120 ° C., and subjected to relaxation heat treatment to spontaneously stretch the polyester multifilament yarn A ′, After heat shrinking the polyester multifilament B ′, the slit heater 5 provided between the heating roll 2 and the second take-up roll 4 is used for 0.05 second at 230 ° C. and 1.8% overfeed rate. Then, heat treatment is performed by performing a second relaxation heat treatment, and after winding twice around the second take-up roll (cold roll) 4, 150 dtex / 84 filament (polyester multifilament A has a single yarn fineness of 1. It was wound up as a mixed yarn of 3 dtex). The chargeability of the obtained mixed yarn was a frictional band voltage of 900V. During the production of the polyester blended yarn, the contact of the yarn with the slit heater 5 was not recognized, and the yarn breakage was only once per spindle per day. The obtained blended yarn was woven into a plain woven fabric having a warp of 60 / cm and a weft of 35 / cm, and was dyed black by dyeing at 135 ° C. for 60 minutes by a conventional method. The texture of the dyed fabric obtained was level 1 and had a highly repellent wool-like touch, and was a swelled-like woven fabric, and there was no generation of static electricity when worn.

[Comparative Example 1]
The same procedure as in Example 1 was performed except that the single yarn fineness of the polyester multifilament yarn A was set to 3.0 dtex. The dyed fabric obtained had a hard texture and was not tactile (Level 3).

[Comparative Example 2]
The same procedure as in Example 1 was performed except that the mixing ratio of the polyester multifilament yarn A and the polyester multifilament yarn B was 50:50. The dyed fabric obtained had good antistatic properties but was not good because of its hard texture (level 3).

[Comparative Example 3]
The same procedure as in Example 1 was performed except that the mixing ratio of the polyester multifilament yarn A and the polyester multifilament yarn B was 90:10. The obtained dyed woven fabric had good antistatic properties, but the shrinkage due to the relaxation heat treatment was small, so that the polyester multifilament B was not sufficiently covered with the polyester multifilament A, and the touch was not good (level 1).

[Comparative Example 4]
In Example 1, it carried out similarly except not adding an antistatic agent to polyester multifilament A. The texture of the woven fabric using the obtained mixed yarn was level 1 and the swelling feeling and high resilience were good, but there was no antistatic property, and static electricity was generated on the crackle when worn.

[Comparative Example 5]
The same procedure as in Example 1 was performed except that the amount of polyoxyalkylene polyether added was 0.1 part. The texture of the woven fabric using the obtained mixed yarn was swelled at level 1 and high resilience was good, but there was no antistatic property, and static electricity was generated on the crackle when worn.

[Comparative Example 6]
In Example 1, relaxation heat treatment was not performed, and a mixed yarn was obtained by a normal false twisting process. The obtained product had many yarn breakage and fluff and poor yield.

  The polyester blended yarn of the present invention is excellent in antistatic properties and is useful for obtaining a highly repellent wool touch-like eyelash-like woven fabric.

A Polyester multifilament yarn that becomes spontaneously stretchable polyester multifilament yarn by relaxation heat treatment
B Heat shrinkable polyester multifilament yarn
1 Supply roll
2 First take-up roll (heating roll)
3 Interlace nozzle
4 Second take-up roll
5 Non-contact heater (slit heater)
6 packages

Claims (4)

A polyester multifilament yarn A, which is a core-sheath type composite fiber, the core part of which is formed of antistatic polyester a, and the sheath part of which is formed of polyester b containing 0 to 10 wt% of a matting agent; A polyester mixed yarn comprising the filament yarn B and satisfying the following conditions (1) to (7).
(1) The single yarn fineness of the polyester multifilament yarn A is 1.5 dtex or less.
(2) The ratio A: B of the core area A and the sheath area B of the polyester multifilament yarn A is in the range of 5:95 to 80:20.
(3) The friction band voltage of the blended yarn is 2000 V or less.
(4) The air entanglement step and the relaxation heat treatment step are obtained in that order.
(5) The mixing ratio of polyester multifilament A and polyester multifilament B is 8-6: 2-4.
(6) Antistatic polyester a is used as an antistatic agent with respect to 100 parts by weight of aromatic polyester.
(A) 0.2 to 30 parts by weight of a polyoxyalkylene polyether represented by the following general formula (1) and (b) an organic ionic compound 0.05 to 10 substantially non-reactive with the polyester Antistatic polyester comprising parts by weight.
^{_{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]
(7) The polyester multifilament A constitutes the outer layer portion of the mixed yarn, and the polyester multifilament B constitutes the inner layer portion.   The relaxation heat treatment is performed in two stages, the first stage is performed on a heating roller of 100 to 130 ° C. and the overfeed rate is 1.0 to 1.5%, and the second stage is 220 to 240 ° C. The polyester mixed yarn according to claim 1, which is carried out at an overfeed rate of 1.5 to 2.0%.   The polyester multifilament yarn A was obtained from an unstretched polyester yarn spun at a speed of 2000 to 5000 m / min, while the polyester multifilament yarn B was copolymerized with 5 to 15 mol% of isophthalic acid as the third component. The polyester mixed yarn according to any one of claims 1 to 2, wherein the polyester mixed yarn is obtained from a polyester multifilament drawn yarn made of polyester and having a boiling water shrinkage of 10 to 16%.   A fabric comprising the polyester blended yarn according to claim 1.

Images