JP2009114604A - Antistatic polyester combined filament yarn - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an antistatic polyester combined filament yarn having excellent touch feeling, antistaticity, antistatic persistence, and dyed grade, good in process passableness in higher processing step(s), and excellent in operation stability and quality stability. <P>SOLUTION: The antistatic polyester combined filament yarn is such that at least one component yarn constituting this filament yarn is an extrafine polyester combined filament yarn A having a single filament diameter of 300 nm to 2 μm and containing a specific polyether-esteramide as an antistatic agent, wherein the polyether-esteramide is present as particles of specific shape in the fibers. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an ultrafine polyester mixed yarn having an excellent texture and excellent antistatic performance in polyester fibers for clothing.

  Polyester is not limited to manufacturing advantages such as excellent productivity and low product price, but also fabric processing, dyeability, comfort of sewing products, handling of clothing products, ease of washing and quick drying, etc. However, it has many advantages over other synthetic fibers and is the most widely used among synthetic fibers. Polyester has been widely studied for blended composite yarns that are blended with other fibers or fibers of different properties in order to increase handling properties and commercial value of fabric products due to excellent moldability.

  The aim of the mixed fiber composite yarn used for the traditional garment application was the inorganic texture of the fabric due to its cold and hard tactile feel and artificial uniformity compared to natural fibers, while other technologies other than the mixed fiber composite have been studied. This is where mixed fiber composite yarns are aimed. As representative techniques of these, there are JP-A-2-19528, JP-A-2002-249941, and the like, and by combining fibers having different heat shrinkage rates, a unique fluffy feeling is imparted at the time of fabric formation, and natural fibers are added. A texture close to that of the fabric used was achieved.

  However, in order to realize a soft texture like natural fibers, a softer touch is applied to the side with a lower heat shrinkage rate of the mixed fiber composite yarns having different heat shrinkage rates (hereinafter referred to as different shrinkage mixed yarns), that is, the sheath side. Thin fibers with a single yarn fineness are often used for touch. As a result, the fibers touching the skin are thinner and softer and can provide a more delicate feel, but at the same time, the fineness of the single yarn fineness increases the fiber surface area and the friction between the single yarns is large, especially in winter It became easier to generate static electricity in a dry environment. Various methods have been proposed to solve these problems. For example, a method in which an antistatic agent is applied to the yarn surface by post-processing, a method in which a hydrophilic substance is graft-polymerized on the yarn surface, or a fiber component is used. Examples include a method of kneading an electric substance. However, all of these methods have problems in terms of durability, heat-resistant yarn-making stability, and quality defects in the knitting and knitting process.

  For example, in the method of applying an antistatic agent to the yarn surface, the antistatic agent is likely to disappear by a dyeing process or washing, and also when applied at the end of the fabric process, the durability is insufficient and the texture is stiff. Alternatively, there are various problems such as being unable to use in combination with other post-processing, specifically water-repellent processing. In addition, the method of graft polymerizing a hydrophilic substance on the yarn surface significantly improves the disappearance of the antistatic agent by washing, but has a problem in durability and texture. Furthermore, although the method of kneading the antistatic material improves the durability, the textile process and the whitening phenomenon during wearing are problematic. This whitening phenomenon is a phenomenon in which the part that has undergone mechanical damage in the textile process becomes a defect in fabric quality, or the part that receives friction when worn is whitened, and the cause is a kneaded antistatic substance Interfacial delamination occurs at the interface between polyester and polyester, and fibrillation tends to occur on the fiber surface, and degradation of fabric quality was a serious problem.

  Further, as proposed in Japanese Patent Laid-Open No. Sho 63-282111 and Japanese Patent No. 2906899, a block polyether ester amide is used as an antistatic polyester fiber blended with a polymer type antistatic component having a high molecular weight and heat resistance. Techniques for antistatic polyester fibers containing a composition and a metal sulfonate compound have been proposed. Although antistatic properties can be obtained by using these antistatic fibers as a component of mixed yarn, however, in order to obtain high antistatic performance, a large amount of antistatic agent must be used, and the spinning tension deteriorates. Or whitening phenomenon due to interfacial peeling between the antistatic agent and polyester.

Japanese Patent Laid-Open No. 2-19528 Japanese Patent Application Laid-Open No. 2002-249941 JP-A-63-28211 Japanese Patent No. 2990689

  The present invention solves the above problems, has excellent texture and antistatic properties, antistatic durability and dyeing quality, and has good processability in high-order processing, operational stability and quality stability. It provides an antistatic ultra-fine polyester blended yarn excellent in.

At least one component yarn constituting the mixed yarn is an antistatic ultrafine polyester fiber containing polyether ester amide as an antistatic agent, and an antistatic ultrafine polyester mixed yarn satisfying the following requirements.
(1) The single yarn diameter of the antistatic polyester fiber is 300 nm to 2 μm.
(2) Containing 3 to 10% by weight of polyetheresteramide with respect to the total weight of the antistatic polyester fiber.
(3) Polyetheresteramide is an ethylene oxide adduct (b) of a polyamide (a) having a carboxyl group at both ends and having a number average molecular weight of 500 to 5,000 and a bisphenol having a number average molecular weight of 1,600 to 3,000. The relative viscosity is 1.5 to 3.5 (0.5 wt% m-cresol solution, 25 ° C.) and the compatibility parameter is ± 0.5 (with respect to the compatibility parameter of the polyester serving as the substrate). J / cm ³ ) ^ 1/2.
(4) The average particle diameter D of the polyetheresteramide in the cross section orthogonal to the fiber axis direction of the antistatic polyester fiber is 10 to 40 nm.
(5) The ratio of the average length L in the fiber axis direction of the polyetheresteramide particles in the cross section parallel to the fiber axis direction of the antistatic polyester fiber to the above D, L / D (also sometimes referred to as aspect ratio) ) Is 200 or more.
(6) The antistatic polyester fiber has an initial charged voltage of 3500 V or less and a half-life of 60 seconds or less.

  As in the present invention, by using a specific polyether ester amide, the dispersion state in the polyester fiber is controlled, and it has excellent texture, quality, durability antistatic property, and antistatic property with excellent process passability. We can provide extra fine polyester blended yarn.

  The antistatic ultrafine polyester blended yarn of the present invention is a blended yarn composed of polyester fibers of two or more component yarns, and at least one component is composed of antistatic ultrafine polyester fibers having a single yarn diameter of 300 nm to 2 μm, The antistatic agent used for the antistatic ultrafine polyester fiber is characterized.

  The antistatic ultrafine polyester fiber has a single yarn diameter and the number of filaments, which are important requirements for enhancing the commercial value in terms of function and fabric texture, and the antistatic ultrafine polyester fiber constituting the antistatic polyester blended yarn of the present invention. The single yarn diameter is preferably 300 nm to 2 μm. If it is less than 300 nm, the effect of the added antistatic agent is impaired, and handling of the fiber becomes difficult. If it exceeds 2 μm, the texture becomes hard, which is not preferable. The number of filaments of the antistatic ultrafine polyester fiber is preferably 400-15000 filaments. Since it is a blended yarn of ultrafine fibers, if the number of filaments is less than 400, it is difficult to withstand the spinning tension due to the lack of absolute strength, which is not preferable for production, and the core sheath is not sufficiently formed to expose the core yarn. It becomes easy. If the number of filaments is 15000 or more, the texture of the fabric is impaired, and the lightness is lowered.

  These antistatic ultrafine polyester fibers can be produced by various methods, but a sea-island composite fiber having 20 to 1000 islands is prepared and made into a superfine fiber by a method of removing sea components after making the fabric. Is preferable in terms of handleability.

  The total fineness of the sea-island composite fiber, which is the parent yarn of the antistatic ultrafine polyester fiber, is preferably 20 to 150 dtex and the number of filaments is preferably 400 to 15000 filaments. Those outside this range are not practical because the die manufacturing cost increases.

  The antistatic agent blended with the antistatic polyester fiber of the present invention is a polyether ester amide derived from an ethylene oxide adduct of high molecular weight bisphenols (sometimes abbreviated as polyether ester amide (A)). Yes, derived from a polyamide (a1) having a number average molecular weight of 500 to 5000 having carboxyl groups at both ends and an ethylene oxide adduct (a2) of bisphenols having a number average molecular weight of 1600 to 3000.

  (A1) is (1) a lactam ring-opening polymer, (2) a polycondensate of an aminocarboxylic acid or (3) a polycondensate of a dicarboxylic acid and a diamine, and the lactam of (1) includes caprolactam, enanthate Examples include lactam, laurolactam, undecanolactam and the like. Examples of the aminocarboxylic acid (2) include ω-aminocaproic acid, ω-aminoenanthic acid, ω-aminopergonic acid, ω-aminocapric acid, 11-aminoundecanoic acid, and 12-aminododecanoic acid. Examples of the dicarboxylic acid (3) include adipic acid, azelaic acid, sebacic acid, undecanoic acid, dodecanedioic acid, isophthalic acid, and the diamines include hexamethylenediamine, heptamethylenediamine, octamethylenediamine, and decamethylene. Examples include diamines. Those exemplified as the amide-forming monomer may be used in combination of two or more. Among these, caprolactam, 12-aminododecanoic acid and adipic acid-hexamethylenediamine are preferable, and caprolactam is particularly preferable.

  (A1) can be obtained by using a dicarboxylic acid component having 4 to 20 carbon atoms as a molecular weight adjusting agent, and subjecting the amide-forming monomer to ring-opening polymerization or polycondensation in the presence of the dicarboxylic acid component by a conventional method. Examples of the dicarboxylic acid having 4 to 20 carbon atoms include fatty acid dicarboxylic acids such as succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, undecadiic acid, dodecanediic acid; terephthalic acid, isophthalic acid, phthalate Acid, aromatic dicarboxylic acid such as naphthalenedicarboxylic acid, aliphatic dicarboxylic acid such as 1,4-cyclohexanedicarboxylic acid, dicyclohexyl-4,4-dicarboxylic acid, sodium 3-sulfoisophthalate, potassium 3-sulfoisophthalate, etc. Examples include alkali metal salts of 3-sulfoisophthalic acid. Of these, preferred are aliphatic dicarboxylic acids, aromatic dicarboxylic acids and alkali metal salts of 3-sulfoisophthalic acid. The number average molecular weight of the above (a1) is usually 500 to 5000, preferably 500 to 3000. When the number average molecular weight is less than 500, the heat resistance of the polyether ester amide itself is lowered, and when it exceeds 5000, the reactivity is lowered. Therefore, it takes much time to produce the polyether ester amide (A).

  The bisphenols of the ethylene oxide adduct (a2) of bisphenols include bisphenol A (4,4′-dihydroxydiphenyl-2,2-propane), bisphenol F (4,4′-dihydroxydiphenylmethane), bisphenol S (4,4). 4'-dihydroxydiphenylsulfone), 4,4'-dihydroxydiphenyl-2,2 butane, etc., among which bisphenol A is preferred. (A2) can be obtained by adding ethylene oxide to these bisphenols by a conventional method. In addition, other alkylene oxides (propylene oxide, 1,2-butylene oxide, 1,4-butylene oxide, etc.) can be used in combination with ethylene oxide, but the amount of other alkylene oxide is usually 10 based on the amount of ethylene oxide. Less than weight.

  When bisphenols are not used, the relative viscosity of the polyether ester amide is lowered, and the particle diameter (D) in the fiber is decreased, which is not preferable. The amount of bisphenol used is desirably 1 to several mol% in the polyether component.

  The number average molecular weight of the above (a2) is usually 1600 to 3000, and it is particularly preferable to use those having an ethylene oxide addition mole number of 32 to 60. When the number average molecular weight is less than 1600, the antistatic property is insufficient, and when it exceeds 3000, the reactivity is lowered, so that a great amount of time is required for producing the polyether ester amide (A).

  (A2) is used in the range of 20 to 80% by weight based on the total weight of (a1) and (a2). If the amount of (a2) is less than 20% by weight, the antistatic performance of the polyetheresteramide (A) is inferior, and if it exceeds 80% by weight, the heat resistance decreases, which is not preferable.

  The composition of the polyether ester amide (A) of the present invention is a very important requirement for compatibility with the polyester as a substrate. In general, as the compatibility parameter (also referred to as the solubility parameter) is closer, the affinity increases and the interfacial peeling is less likely to occur.

Accordingly, the compatibility parameter of the polyetheresteramide (A) of the present invention is such that the antistatic polymer composition is within the range of ± 0.5 (J / cm ³ ) ^ 1/2 with respect to the compatibility parameter value of the polyester. It is necessary to. For example, in the case of polyethylene terephthalate, since the compatibility parameter is 20.9 (J / cm ³ ) ^ 1/2, the compatibility parameter of polyetheresteramide is in the range of 20.4 to 21.4. It is necessary. Beyond this range, the interfacial adhesion between the polyester and the antistatic polymer is insufficient, and a whitening phenomenon due to interfacial delamination occurs due to friction during post-processing and wearing. Preferably, it is within ± 0.3 (J / cm ³ ) ^ 1/2 with respect to the base polyester.
The compatibility parameter of the polyether ester amide (A) can be adjusted by adjusting the composition ratio of the polyamide component amount and the polyether component amount.

As a manufacturing method of polyetheresteramide (A), although the following manufacturing method 1 or manufacturing method 2 is illustrated, it is not specifically limited.
Production Method 1: A method in which an amide-forming monomer and a dicarboxylic acid are reacted to form (a1), (a2) is added thereto, and a polymerization reaction is performed at high temperature and under reduced pressure.
Production method 2: An amide-forming monomer and dicarboxylic acid and (a2) are simultaneously charged into a reaction vessel, and (a1) is produced as an intermediate by pressure reaction at high temperature in the presence or absence of water. A method of performing a polymerization reaction of (a1) and (a2) under reduced pressure.

  Moreover, a well-known esterification catalyst is normally used for said polymerization reaction. Examples of the catalyst include antimony catalysts such as antimony trioxide, tin catalysts such as monobutyltin oxide, titanium catalysts such as tetrabutyl titanate, zirconium catalysts such as tetrabutyl zirconate, and metal acetates such as zinc acetate. And system catalysts. The usage-amount of a catalyst is 0.1 to 5 weight% normally with respect to the total weight of (a1) and (a2).

  The relative viscosity of the polyetheresteramide (A) is 1.5 to 3.5 (0.5 wt% m-cresol solution, 25 ° C.), preferably 1.5.0 to 3.0. If it is less than 1.5, the dispersed particle size of the antistatic agent becomes small and the antistatic property is insufficient. Moreover, in the range exceeding 3.5, it becomes the cause of thread breakage in the yarn making stage.

The addition amount of the polyether ester amide (A) to the antistatic ultrafine polyester fiber needs to contain 3 to 10% by weight. Preferably, it is the range of 6-9 weight%. If it is less than 3% by weight, the antistatic property is insufficient, and if it exceeds 10% by weight, the quality of the yarn is deteriorated, the strength is lowered, and the heat setting property is lowered, thereby deteriorating the quality.
The antistatic ultrafine polyester fiber of the present invention preferably contains an organic electrolyte as an antistatic agent in addition to the polyether ester amide antistatic agent.

  Examples of the organic electrolyte include sulfonic acids such as dodecylbenzenesulfonic acid, dodecylbenzenesulfonic acid, nonylbenzenesulfonic acid, hexadecylsulfonic acid and dodecylsulfonic acid, and alkali metals such as sodium, potassium and lithium. Examples thereof include alkali metal salts of sulfonic acid, alkali metal salts of phosphoric acid such as distearyl phosphate, and among them, metal salts of sulfonic acid such as sodium alkyl sulfonate are preferable. The content is 0.05 to 0.8 wt%, and if it is 0.05 or less, the antistatic property is insufficient, and if it is 0.8 or more, it does not disperse uniformly and forms an associated state to disperse. This is undesirable because it causes defects and the accompanying whitening phenomenon.

  Examples of the polyester used in the antistatic ultrafine polyester fiber of the present invention include polyethylene terephthalate, polyalkylene terephthalate typified by polytrimethylene terephthalate, polyalkylene phthalate, etc. A polyester having 2 to 6 carbon atoms of an alkylene glycol component, that is, a polyester having at least one glycol selected from ethylene glycol, trimethylene glycol, tetramethylene glycol, pentamethylene glycol and hexamethylene glycol as a main glycol component is used. Such a polyester may be produced by an arbitrary method. For example, polyethylene terephthalate can be described by directly esterifying terephthalic acid and ethylene glycol, or lower alkyl ester of terephthalic acid such as dimethyl terephthalate and ethylene glycol. To form a glycol ester of terephthalic acid and / or its low degree of polymerization, such as by reacting terephthalic acid with ethylene oxide, and then heating the product under reduced pressure to produce the desired The polycondensation reaction is carried out until the degree of polymerization becomes.

  In the above polyester, a part of the terephthalic acid component may be replaced with another bifunctional carboxylic acid component. Examples of such carboxylic acids include isophthalic acid, phthalic acid, dibromoterephthalic acid, naphthalene dicarboxylic acid, diphenyl carboxylic acid, diphenethane carboxylic acid, bifunctional aromatic carboxylic acid such as β-oxyethoxybenzoic acid, and sebacin. Bifunctional aliphatic dicarboxylic acid such as acid, adipic acid and oxalic acid, 1,4-cyclohexanedicarboxylic acid and the like can be mentioned. Further, part of the glycol component may be replaced with another glycol component. Examples of the glycol component include cyclohexane-1,4-dimethanol, neopentyl glycol, bisphenol A, bisphenol S, 2,2-bis (3 , 5-dibromo-4- (2-hydroxyethoxy) phenyl) propane, and aliphatic, alicyclic and aromatic diols. Further, the above-mentioned polyester may be obtained by blending and melting a small amount of other polymers as required, or by using a small amount of a chain branching agent such as pentaerythritol, trimethylolpropane, trimellitic acid or the like. In addition, the polyester of the present invention may be added with pigments such as titanium oxide and carbon black, as well as conventionally known antioxidants and anti-coloring agents in the same manner as ordinary polyesters.

The dispersion state of the polyether ester amide (A) of the present invention in the antistatic polyester fiber is an important invention requirement and must satisfy the following requirements.
(1) It is necessary that the average particle diameter D of the polyether ester amide (A) in the cross section orthogonal to the fiber axis is in the range of 10 to 40 nm. Preferably, it is the range of 15-40 nm. If it is less than 10, the initial charging voltage and / or the half-life is deteriorated. On the other hand, if it exceeds 40 nm, unevenness of the thickness of each filament is likely to occur, and spinning / drawing process breakage occurs frequently. Productivity deteriorates.

(2) When the average length L in the fiber axis direction of the polyetheresteramide (A) particles in a cross section parallel to the fiber axis is L (average length of the particles in the fiber axis direction) / D (in the fiber axis) The average particle diameter in an orthogonal cross section is required to be 200 or more. In order to impart antistatic properties, it is important to provide a field where the antistatic agent is in a long continuous state in the fiber and the charge easily moves. Therefore, the longer the length of the agent in the fiber axis direction, the better. Preferably, it is 250 or more, More preferably, it is 300-400.

Further, as a requirement for determining the dispersion state of the polyether ester amide (A) in the antistatic polyester fiber, shearing in the die in the spinning step in the production method and spinning draft after discharging the die are important. This is a requirement necessary to achieve antistatic properties and quality by setting the particle size and length of the antistatic agent within a certain range. That is, it is necessary to set the cap hole diameter and the discharge amount so that the shear rate (formula 1) in the discharge hole is in the range of 400 to 9000.
Shear rate: Vs (sec ⁻¹ ) = 4Q (cm ³ / sec) / πr (cm) ^ 3 Formula 1
Q: Polymer discharge amount per discharge hole (cm ³ / sec)
r: radius of the discharge hole (cm ³ )

  If the hole diameter is too large relative to the discharge amount, the dispersion (particle size reduction) action of the antistatic agent in the discharge hole is small, so that the dispersion of the particle diameter is large, which is likely to cause yarn breakage. On the other hand, if the discharge hole diameter is too small and the dispersion action is too large, the particle diameter becomes small and the antistatic effect is not achieved. Accordingly, a shear rate range of 400 to 9000 is required, and preferably 600 to 8000. Moreover, it is preferable that the spinning draft ratio = V2 / V1, which is the ratio of the extrusion speed V1 from the discharge hole and the take-up roller speed V2, is in the range of 200 to 2000. It has a round to oval shape with a range of particle sizes within the discharged blend polymer stream, in which the entire polymer stream is gradually stretched and accelerated while being cooled, resulting in a glass transition temperature. At this point, the take-up speed V2 has been reached. The acceleration dV / dx during that time increases as the spinning draft increases, and the polymer stream undergoes large deformation. Therefore, in order to stretch the antistatic agent, the draft needs to be in a large range, that is, 200 to 2000. Here, when it is less than 200, the agent is not sufficiently elongated, and the L / D is less than 100, resulting in insufficient antistatic properties. On the other hand, if it exceeds 2000, the large deformation action is excessive and there is a problem of spun yarn, which is insufficient.

  As the antistatic performance of the antistatic ultrafine polyester fiber used for the mixed yarn, it is necessary that the initial charging voltage is 3500 V or less and the half-life is 60 seconds or less. Preferably, the initial charging voltage is 3400 V or less and the half-life is 40 seconds or less, more preferably the initial charging voltage is 3000 V or less and the half-life is 20 seconds or less. When the initial charged voltage is 3500 V and the half-life exceeds 60 seconds, clothing clinging or generation of static electricity may occur, and there is no practical antistatic effect.

Next, the blended yarn process will be described.
It is preferable that at least one component constituting the antistatic ultrafine polyester mixed yarn of the present invention is an antistatic ultrafine polyester fiber, and the sheath fiber is an antistatic ultrafine polyester fiber from the touch feeling.

  The sheath fiber of the mixed yarn can be made an antistatic ultrafine polyester fiber by a known method. For example, a low boiling water shrinkable sea-island composite fiber yarn (parent material) having an island component as an antistatic polyester can be used. Yarn) is entangled with high-boiling water shrinkable polyester fiber yarns to make blended yarns, weaving and knitting to remove sea components from fabric by alkali weight reduction, and use hot water treatment such as dyeing to use the difference in shrinkage Thus, it is preferable to use a high-boiling water-shrinkable polyester fiber yarn as a mixed fiber in which the core portion is formed. The total fineness after ultrafinening is preferably 20 to 150 dtex, and the number of filaments at that time is preferably 400 to 15000. When the total fineness of the sheath fiber is less than 20 dtex, the core yarn is exposed and the quality is liable to be deteriorated when forming the fabric, and when it exceeds 150 dtex, it is not practical in terms of handling of the mixed yarn. If the number of filaments is less than 400, the strength is weak, and if it exceeds 15000, the texture is undesirably lowered. Preferably it is 500-10000.

The total fineness of the core fiber is 20 to 110 dtex from the viewpoint of core-sheath formation, and the number of filaments at that time is preferably 5 to 288 filaments. If the total fineness is extremely thin, the strength of the fabric is insufficient, and the same problem occurs even if the single yarn fineness is thin.
When both the core and sheath are antistatic polyester ultrafine fibers, they can be prepared as sea-island composite fibers having different boiling water shrinkage rates by adjusting the draw ratio and the like at the stage of sea-island composite fibers.

  A typical mixed yarn process of the present invention will be described with reference to the accompanying drawings (FIG. 1). After the highly oriented polyester unstretched multifilament (A) and the polyester multifilament (B) are aligned and supplied to the supply roller (1), and then entangled with the entanglement air jet nozzle (3), Pre-heated by the pre-heating roller (2) and stretched to a predetermined magnification by the take-off roller (4). At this time, these mixed yarns are heat-set by a set heater (5) provided between the preheating roller and the take-up roller. Further, the yarn taken up by the take-up roller is continuously wound up by a take-up device arranged on the rear side to obtain a target mixed yarn package (6).

  The method of weaving the polyester fiber and the weaving structure are not particularly limited, but it is preferable to select a weaving method and a structure that make use of the characteristics of the appearance of the blended polyester yarn and the swelling and texture of the blended fiber. In order to effectively express the characteristics of the mixed yarn, it is preferable to express the characteristics by making the yarn into a fabric and then performing boil-off, pre-setting, sea removal treatment, dyeing, and final setting according to a conventional method. .

Hereinafter, the present invention will be described in detail using specific examples.
Each measurement method is implemented as follows.
(1) Measurement of particle size of antistatic agent A cross section perpendicular to a 100 nm thick fiber of the antistatic polyester fiber of the present invention was prepared and observed for measurement with a transmission electron microscope. The diameter of the particles is measured at n = 100, and the average value is calculated.
(2) Measurement of L / D of antistatic agent In order to measure the antistatic polyester fiber of the present invention with a transmission electron microscope, a fiber axis section having a thickness of 100 nm is prepared and observed. At this time, the length of the antistatic agent particles in the fiber axis direction is measured at n = 50, and the average value is calculated. The ratio of the average L value and the average D value of (1) is calculated to obtain the L / D value.
(3) Measurement of initial charged voltage and half-life The antistatic polyester fiber of the present invention was measured according to the JIS L 1094 half-life measuring method, and the charged voltage (V) and charged voltage after 30 seconds from application of a predetermined voltage were Measure the time (s) required to halve. The measurement was carried out in a test room at a temperature of 20 ± 1 ° C. and a relative humidity of 40 ± 2%.
(4) Whitening test Prepare a test cloth after the dyeing process. Using an electric iron preheated to 150 ± 5 ° C., the test cloth is slid 6 times (3 reciprocations) at a speed of 2 cm per second. The temperature is the surface temperature at the center of the bottom surface of the electric iron. Next, 15% weight reduction is performed using a hot alkaline aqueous solution. Color measurement n = 2 of the L value (degree of whitening) of the test cloth (L1) to which the load is applied from the outside and the test cloth (L0) to which the load is not applied from the outside is performed by the following formula. The obtained color difference value is defined as whitening.
Whitening property = L1-L0 (formula)
The whitening property is 1.0 or less.

[Examples 1 to 4]
Polyethylene terephthalate chips (IV = 0.65) obtained by drying the polyether ester amide described in Table 1 (containing 0.8% Na alkyl sulfonate as an ionic substance) at 80 ° C. and dried at 160 ° C. And blended with the melt and melted at 295 ° C. Island component, modified polyethylene terephthalate copolymerized with 9% mol of 5-sodium sulfoisophthalic acid and 3% by weight of polyethylene glycol with a number average molecular weight of 4,000. As shown in Table 1, the base for sea-island composite fibers and the addition amount were changed, and the polymer was discharged and wound up. The raw yarn is drawn and heat set with a roller having a preheating temperature of 90 ° C. and a slit heater with a setting temperature of 170 ° C., and the number of islands, the number of filaments, the total fineness, and the hot water shrinkage are as shown in Table 1. A polyester yarn parent yarn was produced. Separately, a highly oriented undrawn yarn (POY) with 70 dtex and hot water shrinkage of 50% is produced from a die having 144 holes by a conventional method of polyethylene terephthalate as a partner yarn, and the previous drawn yarn and the one shown in FIG. In the process, a mixed fiber was produced by an air entanglement method. This mixed yarn was put into a circular knitting state with a 20G cylinder knitting machine, refined and subjected to alkali weight reduction at 55 ° C. for 10 to 40 minutes with 3.5% caustic soda to remove sea components and washed with water and dried. High-pressure dyeing was performed at 120 ° C. using 4% dye in terms of cloth weight, and simultaneously hot water shrinkage was performed. A tubular knitted fabric was produced in which a polyester extra-fine fiber containing an antistatic agent was made of a mixed yarn having a sheath portion and a counterpart yarn polyester fiber being a core portion. The initial charged voltage and half-life were measured using the stained sample. The L / D, fiber diameter, initial voltage, whitening, texture, etc. of the obtained fiber are as shown in the table.

  In Examples 1, 2, 3, and 4, the amount of polyether ester amide (hereinafter PEEA) is appropriate and the compatibility parameter is within the range, and the particle size of the antistatic agent and the length in the fiber axis direction are satisfied. It is an antistatic polyester blended yarn excellent in performance and quality without initial charging voltage, half-life and whitening phenomenon.

[Comparative Examples 1 to 7]
In Comparative Examples 1 to 7, as shown in the table, the process up to the spinning preparation stage was performed in the same manner as in the Examples, and the antistatic agent blend ratio was changed in the spinning stage. In Comparative Example 1, since the amount of PEEA added is small, the antistatic property is insufficient. On the other hand, in Comparative Example 2, since the amount of PEEA added is too large, yarn breakage frequently occurs in spinning, and the present invention. It does not satisfy. In Comparative Example 3, PEEA was not added for reference, the initial voltage was high, and the half-life was long.Comparative Example 4 was high in relative viscosity and was outside the invention, and the spinning condition was poor and whitening was observed. Comparative Example 5 is a polyether ester amide that does not contain bisphenol A and has a low initial viscosity due to its low viscosity and small particle size within the fiber, although the reason is not clear. Comparative Examples 6 and 7 are antistatic agents having a low compatibility parameter and high antistatic agents, and neither of the whitening and the half-life is satisfied.

  Since the antistatic polyester blended yarn of the present invention has antistatic properties and antistatic durability as well as excellent texture, it is useful for men's and women's clothing applications.

These are explanatory drawings regarding the manufacturing method of the toned blended yarn of an Example of this application.

Explanation of symbols

1: Raw yarn supply roller 2: Preheating roller 3: Compressed air entanglement device 4: Take-off roller 5: Set heater 6: Product A: Sheath yarn (antistatic polyester yarn)
B: Core yarn (mating yarn)

Claims (2)

An antistatic ultrafine polyester mixed yarn characterized in that at least one component yarn constituting the mixed yarn is an antistatic ultrafine polyester fiber containing polyetheresteramide as an antistatic agent, and satisfies the following requirements.
(1) The single yarn diameter of the antistatic polyester fiber is 300 nm to 2 μm.
(2) Containing 3 to 10% by weight of polyetheresteramide with respect to the total weight of the antistatic polyester fiber.
(3) Polyetheresteramide is an ethylene oxide adduct (b) of a polyamide (a) having a carboxyl group at both ends and having a number average molecular weight of 500 to 5,000 and a bisphenol having a number average molecular weight of 1,600 to 3,000. The relative viscosity is 1.5 to 3.5 (0.5 wt% m-cresol solution, 25 ° C.) and the compatibility parameter is ± 0.5 (with respect to the compatibility parameter of the polyester serving as the substrate). J / cm ³ ) ^ 1/2.
(4) The average particle diameter D of the polyetheresteramide in the cross section orthogonal to the fiber axis direction of the antistatic polyester fiber is 10 to 40 nm.
(5) The ratio of the average length L in the fiber axis direction of the polyetheresteramide particles in the cross section parallel to the fiber axis direction of the antistatic polyester fiber to the above D, L / D (also sometimes referred to as aspect ratio) ) Is 200 or more.
(6) The antistatic polyester fiber has an initial charged voltage of 3500 V or less and a half-life of 60 seconds or less.   A textile product comprising the antistatic polyester blended yarn of claim 1.

Images