JP2009019287A - 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, antistatic properties, antistatic durability and dyeing grade, good properties of passing through steps in high-order processing and excellent operation stability and quality stability. <P>SOLUTION: The antistatic polyester combined filament yarn is a polyester combined filament yarn comprising at least one component yarn which composes the combined filament yarn and contains a specific polyether-ester-amide as an antistatic agent. In the polyester combined filament yarn, the polyether-ester-amide is present as particles having a specified particle diameter and a specific aspect ratio in the fiber. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a 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 such 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 hollow cracking and spinning There have been problems such as deterioration in tone and whitening 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 polyester blended yarn having excellent resistance.

At least one component yarn constituting the mixed yarn is an antistatic polyester fiber containing polyether ester amide and an organic electrolyte as an antistatic agent, and the antistatic polyester mixed yarn satisfies the following requirements.
(1) Containing 3 to 10% by weight of polyetheresteramide with respect to the total weight of the antistatic polyester fiber.
(2) 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.
(3) 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.
(4) 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 an aspect ratio) ) Is 100 or more.
(5) The frictional voltage of the antistatic polyester mixed yarn is 2000 V 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. Polyester mixed yarn can be provided.

The antistatic polyester mixed yarn of the present invention is a mixed yarn composed of polyester fibers of two or more component yarns, and at least one component is composed of antistatic polyester fibers, and the antistatic agent used for the antistatic polyester fibers It has the characteristics.
That is, the antistatic agent blended with the antistatic polyester fiber is a polyether ester amide antistatic agent containing a predetermined amount of an organic electrolyte in a polyether ester amide derived from an ethylene oxide adduct of high molecular weight bisphenols. is there.

  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.

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

  (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 Aromatic dicarboxylic acids such as acids and naphthalenedicarboxylic acids; aliphatic dicarboxylic acids such as 1,4-cyclohexanedicarboxylic acid and 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 polyetheresteramide (A).

(A2) is used in the range of 20 to 80% by weight based on the total weight of (a1) and (a2). When the amount of (a2) is less than 20% by weight, the antistatic property of the polyetheresteramide (A) is inferior, and when it exceeds 80% by weight, the heat resistance is lowered, 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 polyetheresteramide (A) to the polyester needs to be 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 due to deterioration of the spinning process tone, strength, and heat setting.

  Examples of the polyester used in the present invention include polyethylene terephthalate, polyalkylene terephthalate typified by polytrimethylene terephthalate, and polyalkylene phthalate. Among them, the former terephthalic acid is the main acid component, and alkylene having 2 to 6 carbon atoms. It is intended for a polyester having a glycol component as a main glycol component, that is, at least one glycol selected from ethylene glycol, trimethylene glycol, tetramethylene glycol, pentamethylene glycol and hexamethylene glycol. 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 10-30 nm. If it is less than 10, the frictional voltage exceeds 2500 and the antistatic property is insufficient. On the other hand, if it exceeds 40 nm, the thickness of each filament is likely to be uneven, and spinning / drawing process breakage, etc. Will occur frequently and productivity will deteriorate.
(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) needs to be 100 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 200-400. L / D can be easily adjusted by the shear rate at the time of melt spinning and the spinning draft rate, as will be described later.

  The antistatic polyester fiber described above is used as one component of the blended yarn. As the antistatic performance of the antistatic polyester fiber, the frictional voltage is preferably 1500 V or less. Preferably, it is 1000 V or less. When the voltage exceeds 1500 V, the antistatic property of 2000 V or less cannot be obtained when a mixed fiber is used, and when it is used as clothing, clinging of clothing or generation of static electricity may occur.

  Similarly, the single yarn fineness and the number of filaments are also important requirements for increasing the commercial value in terms of function and fabric texture, and the single yarn fineness of the fiber yarn constituting the antistatic polyester mixed yarn of the present invention is: It is preferable that it is 10 dtex or less. If it exceeds 10 dtex, the texture becomes hard, which is not preferable. In order to meet the need for lightening (thinning), it is important to reduce the number of filaments to 12 or less, but if it is less than 12, it is difficult to withstand the spinning tension due to insufficient absolute strength, which is not preferable for production.

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. Further, it is necessary that the spinning draft rate = 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 130, 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.

Next, the blended yarn process will be described.
As the blended yarn, the above-mentioned antistatic polyester yarn is included as a one-component yarn, so that sufficient antistatic property can be obtained as the blended yarn. However, the antistatic polyester yarn is disposed on the core-sheath core yarn. It is more preferable to maintain the antistatic performance.

  The fineness of the sheath yarn is preferably 20 to 150 dtex, and the number of filaments at that time is preferably 10 to 150 filaments. When the fineness of the sheath fiber is thinner than this range, the core yarn is exposed and the quality is liable to be deteriorated when the fabric is formed, and when it is thick, the fiber is unpractical in terms of handling of the mixed yarn. Further, the number of filaments may be in a range that can withstand practical use, but it is preferable that the single yarn fineness is narrower than the sheath fiber.

  The fineness of the core yarn is preferably 20 to 110 dtex from the standpoint of antistatic performance, and the number of filaments at that time is preferably 5 to 48 filaments. If the fineness is extremely thin, the performance of the fabric is not sufficiently exhibited, and the same problem occurs even if the single yarn fineness is thin.

  A typical process of the present invention will be described with reference to the accompanying drawings (FIG. 1). After the highly oriented polyester unstretched yarn (A) and the antistatic polyester yarn (B) are aligned and supplied to the supply roller (1), then the yarn is entangled with the entanglement air jet nozzle, Pre-heated by the pre-heating roller (2) and stretched to a predetermined magnification by the take-up 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 such swell and feel characteristics of the mixed fiber yarn, heat shrinkage is performed by boil-off, pre-setting, dyeing, and final setting according to a conventional method after the yarn is made into a fabric. It is preferable to use a difference or the like.

Hereinafter, the present invention will be described in detail using specific examples.
Each measurement method is implemented as follows.
(1) Particle size and L / D measurement of antistatic agent Cross section perpendicular to 100 nm thick fiber of the polyester fiber of the present invention was prepared and observed for measurement with a transmission electron microscope, and within the fiber cross section The diameter of each particle is measured at n = 100, and the average value is calculated.
(2) Measurement of L / D of antistatic agent In order to measure the polyester fiber of the present invention with a transmission electron microscope, a section in the fiber axis direction 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 set to n = 5
Measure at 0 and calculate the average value. The ratio of the average L value and the average D value of (1) is calculated to obtain the L / D value.
(3) Friction band voltage measurement Circular knitting using sample mixed yarn, measured according to JIS L 1094 friction band voltage measurement method, and measured charged voltage (V) 60 seconds after the start of friction, mixed yarn The friction band voltage. The measurement was carried out in a test room at a temperature of 20 ± 1 ° C. and a relative humidity of 40 ± 2%. The warp yarn direction and the weft yarn direction were measured at each n = 5, and a white cloth attached to cotton specified in JIS L 0803 was used as the friction cloth.
(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
The whitening property is 1.0 or less.

[Examples 1 to 4]
Polyether ester amides (containing 0.8% Na alkyl sulfonate as an ionic substance) at 80 ° C. dried at 160 ° C. and highly shrinkable polyethylene terephthalate chips (total acid) The component isophthalic acid was blended with 10 mol% copolymerization, IV = 0.64, compatibility parameter 20.9) and melted at a melting temperature of 295 ° C., and then passed through a pack in which a 400M filter was placed on the top of the base. The polymer was discharged and wound up while changing the cap hole diameter and hole number conditions and the amount added. The raw yarn was drawn and heat set using a roller having a preheating temperature of 90 ° C. and a slit heater having a setting temperature of 170 ° C. to produce an antistatic polyester yarn having a hot water shrinkage of 16%.
Separately, polyethylene terephthalate was discharged from a die having 144 holes by a conventional method to produce highly oriented undrawn yarns as shown in Table 1 of 70 dtex, and then aligned with the above antistatic polyester yarns and mixed by air entanglement method. A yarn was prepared. The friction band voltage of the blended yarn is as shown in the table.

The blended yarn was put into a circular knitting state with a 20 G cylinder knitting machine, refined at 80 ° C., washed with water and dried, then dyed with high pressure at 120 ° C. using 4% of the dye in terms of fabric weight and dried. The obtained fabric was a core-sheath mixed yarn fabric with good feeling of fluffiness in which the antistatic polyester yarn was contracted to the core yarn and the other polyethylene terephthalate yarn was positioned to the sheath yarn.
In Examples 1, 2, 3, and 4, the amount of polyetheresteramide (hereinafter referred to as PEEA) is appropriate and the compatibility parameter is within the range, and the yarn forming conditions such as the shear rate in the die and the draft are within the scope of the present invention. The antistatic polyester blended yarn with excellent performance and quality, satisfying the particle size of the antistatic agent and the length in the fiber axis direction. It has become.

[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 discharge amount and the antistatic blend ratio were 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, for reference, PEEA was not added, and the friction band voltage of the blended yarn was high. In Comparative Example 4, the relative viscosity was high and outside of the invention, and the spinning condition was poor and whitening was observed. Example 5 is a polyether ester amide containing no bisphenol A. The viscosity is low, the particle size in the fiber is small, and the reason is not clear, but the friction band voltage of the mixed yarn is high. Comparative Examples 6 and 7 are antistatic agents with low compatibility parameters and high antistatic agents, and neither whitening nor the frictional band voltage of the mixed yarn 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.

It is explanatory drawing regarding the manufacturing method of the antistatic polyester 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 Highly oriented polyester undrawn yarn B: Core yarn Antistatic polyester yarn

Claims (2)

An antistatic polyester mixed yarn characterized in that at least one component yarn constituting the mixed yarn is an antistatic polyester fiber containing polyetheresteramide as an antistatic agent, and satisfies the following requirements.
(1) Containing 3 to 10% by weight of polyetheresteramide with respect to the total weight of the antistatic polyester fiber.
(2) 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.
(3) 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.
(4) 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 an aspect ratio) ) Is 100 or more.
(5) The frictional voltage of the antistatic polyester mixed yarn is 2000 V or less.   A textile product comprising the antistatic polyester blended yarn of claim 1.

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