JP4765481B2 - Woven knitted fabric made of blended yarn - Google Patents

Description

  The present invention relates to a woven or knitted fabric made of a mixed yarn having a dry touch, excellent water absorption and sweat treatment properties, and a dry feeling. More specifically, it relates to woven and knitted fabrics composed of mixed yarns that combine water absorption / sweat treatment, dry feeling, high coloring with unprecedented pearl-like milky feeling, excellent sheerproofness, and UV-cutting effect. It is.

  Polyester is excellent in durability such as dimensional stability and chemical resistance, and is used for various purposes from the usefulness of its functionality. For example, it is suitably used for clothing, industrial use, materials use, medical use, etc. .

  On the other hand, in the market, the demand for specialization of synthetic fibers is increasing year by year, and among them, the demand for high color development fibers is strong, and various studies have been made mainly by synthetic fiber companies. Conventionally, polyester obtained by copolymerizing 5-sodium sulfoisophthalic acid alone in order to obtain cationic dyeability (see Patent Documents 1 and 2) and 5-sodium sulfoisophthalic acid in order to obtain atmospheric pressure cationic dyeability. A polyester copolymerized with adipic acid (see Patent Documents 3 and 4) is known. However, the polyesters obtained by these methods contain a large amount of diol components produced in the transesterification and polycondensation reaction steps, and not only mechanical properties and heat stability are significantly reduced, but also by ordinary methods. When spinning, stable spinning is difficult due to the high melt viscosity of the polymer. In order to solve this problem, a technique of copolymerizing an isophthalic acid component containing a metal sulfonate group and a glycol has been disclosed (see Patent Documents 5, 6, and 7). Certainly, this method made it possible to suppress the thickening effect of the cationic dyeable polymer. However, in recent years, there has been a demand for not only high color developability but also composite function with anti-transparency, UV cut and the like. In general, a method of adding inorganic particles having high light reflectivity is known as a means for imparting anti-penetration properties and UV-cutting properties. Among these, titanium oxide particles can be suitably used because of their high light reflectivity, ease of handling and low cost.

  On the other hand, polyester is produced from terephthalic acid or an ester-forming derivative thereof and alkylene glycol, and in a commercial process for producing a high molecular weight polymer, an antimony compound is widely used as a polycondensation catalyst. However, polymers containing antimony compounds have some undesirable properties as described below.

  For example, when a polymer obtained using an antimony catalyst is melt-spun into a fiber, it is known that an antimony catalyst residue is deposited around the die hole.

  As this deposition progresses, it becomes a cause of defects in the filament, so that it needs to be removed in a timely manner. The deposition of the antimony catalyst residue is considered to be due to the antimony compound in the polymer being transformed in the vicinity of the die and partially vaporizing and dissipating, and then a component mainly composed of antimony remains in the die.

  In addition, the antimony catalyst residue in the polymer tends to become relatively large particles, which can be a foreign matter, resulting in increased filter filtration pressure during molding, thread breakage during spinning, or film breakage during film formation, etc. It has undesirable characteristics and contributes to a decrease in operability.

  In particular, when the above-described titanium oxide particles or isophthalic acid component containing a metal sulfonate group is used as the antimony catalyst residue, foreign particles are formed using the isophthalic acid component as a nucleus, and the degree thereof increases. Moreover, when they are used in combination, the degree of deterioration is inevitably deteriorated, and not only the yarn breakage and the filtration pressure increase, but also the workability and quality of the obtained fiber product are reduced. It was impossible to obtain a polyester fiber that has both good properties, UV-cutting properties and high color development.

In recent years, attention has been focused on sportswear such as swimwear, leotards, and wet suits, and inner uses such as shirts, shorts, and lingerie as the main uses of woven and knitted fabrics made of cationic dyeable fibers. In addition to the fashionability, opacity, and UV-cutting effects, excellent water absorption and sweat treatment properties and stretch properties are required. As a method of imparting water absorption and sweat treatment properties to a woven or knitted fabric, it is a side-by-side type composite hollow thick thread, which extends to the thick part of the polyester in a direction perpendicular to the fiber axis and reaches the hollow part of the fiber by weight reduction with alkali. Water-absorbing polyester fabric comprising a polyester composite hollow thick fiber yarn having standing grooves (Patent Document 8) and at least one type of filament of polyester multifilament yarn composed of two or more types of filament yarns having different cross-sectional shapes The yarn is a filament yarn having a cross-sectional shape with no recesses, and the other filament yarns are composed of filaments having a cross-sectional shape having 3 to 8 recesses, and the filament yarns having the respective cross-sectional shapes are in a random state on the inner layer of the outer layer A woven or knitted fabric (patent document 9) made of a mixed composite yarn dispersed and mixed in . On the other hand, as means for imparting stretch properties to the polyester fiber, false twisting method, a method of imparting crimp characteristics to the original yarn itself by composite spinning of polymers having different shrinkage characteristics into side-by-side type, Examples of methods include composite blending with seed fibers, mixed use with processed fibers, crimped yarns, and elastic fibers such as polyurethane. Among them, knitting with elastic fibers is the most versatile in the original yarn and higher order. Can be preferably used. However, since the elastic yarn has a large variation in the residual elongation of the original yarn, it causes tension unevenness during knitting, and tends to deteriorate the quality of the warp and the like. When the dyeable polyester fiber was used for the other, the quality was not particularly lowered and could not be commercialized.
Japanese Examined Patent Publication No. 34-01497 (Claims) JP 11-506484 A (Claims) JP 61-239015 (Claims) JP-A-11-093020 (Claims) JP 59-026521 A (claims) JP-A-63-048353 (claims) JP 63-120111 A (claims) JP 05-295633 A (claims) JP 2001-271251 A (Claims)

  An object of the present invention is to solve the above-mentioned conventional problems, and it is possible to obtain a dry texture, and has an excellent drape and swell, and an unprecedented pearly milky feeling. Has high color development, excellent anti-peeling properties, and a mixed yarn that can provide woven and knitted fabrics that can satisfy the UV-cut effect at the same time, and does not generate fuzz or warp, etc. An object of the present invention is to provide a woven or knitted fabric made of mixed yarn that can be obtained by the method and a method for producing the same.

In order to solve the above problems, the present invention employs the following configuration. That is, 0.1 to 6 mol% of 5-sulfoisophthalic acid metal salt and 0.1 to 5 wt% of polyethylene glycol having a weight average molecular weight of 200 to 6000 are copolymerized and do not contain antimony or have an atomic equivalent content. 30ppm or less, a further polyester multifilament yarn of two or more different cross-sectional shapes consisting of titanium oxide particles 1-2 wt% and a diol component of poly ethylene terephthalate containing 1.5-1.8 wt%, One is a filament yarn having a cross-sectional shape having no recesses, and the other is a filament yarn having a cross-sectional shape having 3 to 8 recesses. The filament yarns of each cross-sectional shape are mixed in a random state, and the color tone A knitted or knitted fabric comprising a mixed yarn, wherein the L value is 90 to 95 and the residual elongation is 36 to 50%.

  According to the present invention, even when raw silk is used, it has a drape and dry feeling, and further has good water absorption, see-through properties and UV-cutting properties. A woven or knitted fabric made of a mixed fiber having color developability can be provided. In particular, when developed for sportswear such as swimsuits, leotards, wet suits, and inner uses such as shirts, shorts, and lingerie, the water-absorbing effect of the cross-sectional shape of the raw yarn and the water-absorbing effect of the modified polymer will relieve the feeling of stickiness caused by sweat. The Moreover, the high coloring property, the anti-glare property and the UV cut effect which are important selling points in these applications can be obtained at the same time.

  The present invention is described in further detail below.

  First, the mixed yarn constituting the woven or knitted fabric of the present invention will be described. The blended yarn constituting the woven or knitted fabric of the present invention is a multifilament yarn obtained by combining filament yarns having different cross-sectional shapes. There are two or more types of cross-sectional shapes, of which at least one type of filament yarn is made of a filament yarn having a cross-sectional shape with no recesses, and the other filament yarns are cross-sectional shape filament yarns having 3 to 8 recesses It is important to be composed of

1-10 is explanatory drawing explaining a fiber cross-sectional shape. Describing in more detail with reference to the drawings, the cross-sectional shape having no recess in the present invention is basically a cross-sectional shape having no plurality of contacts when a tangent line in contact with the cross-sectional contour is drawn in the same cross section. Say. Specific examples of the cross-sectional shape that does not have the above-mentioned concave portion include a circle (FIG. 1), an ellipse (FIG. 2), a rice ball-shaped circle (FIG. 3), a polygon that is a triangle or more, and is relatively rounded. (Fig. 4). In these, as shown in FIG. 1, when a tangent line (L ₁ ) is drawn, a plurality of contacts do not exist and only one contact (S ₁ ) exists.

On the other hand, a cross-sectional shape having a recess means that when a tangent line (L ₂ ) that touches the cross-sectional contour in the same cross section is drawn, a plurality of contact points (S ₂ , S ₃ ) are provided, and a recess (U) is provided between the contact points. It is formed and refers to a cross-sectional shape in which a convex portion is formed between the concave portion and the concave portion. In the present invention, it is important that the cross-sectional shape has 3 to 8 recesses, and either a symmetric type or an asymmetric type may be used, and the size of the recess is not particularly limited. Examples of such a cross-sectional shape include a Y shape (FIG. 5), a four leaf shape (FIG. 6), a six leaf shape (FIG. 7), an eight leaf shape (FIG. 8), and a comb shape (FIG. 9). In these, as shown in FIG. 5, there is a tangent having a plurality of contacts when the tangent is drawn. In order to obtain an excellent dry feeling as a texture of the woven or knitted fabric in the cross-sectional shape having the recesses, 3 to 6 recesses are preferable. When the number of the recesses is less than 3 or more than 8, it is not preferable because the dry feeling cannot be obtained as a texture of the woven or knitted fabric.

  In the present invention, by setting the irregularity of the filament yarn having the recesses to 10 or more, the inter-fiber gap is secured, the water absorption and the sweat treatment property by the capillary effect are improved, and the tension stiffness and the draping property are also imparted. Is done. In addition, this highly deformed cross section eliminates the slime characteristic peculiar to polyester, and a smooth dry touch can be obtained.

The irregularity referred to here is a value calculated from the distance (H) from the most depressed point (U) of the concave portion in FIG. 5 to the tangent S2-S3 and the distance (D) between the contacts S2 and S3 by the following equation. It is.
Deformity = (H / D) × 100
FIG. 10 is a schematic cross-sectional view showing an example of the mixed fiber of the present invention. As shown in this figure, a composite fiber composed of a filament yarn having a circular (round) cross section and a six-leaf type cross section has a convex part formed by a cross-sectional shape having a concave part (a protruding part formed between the concave part and the concave part). ) And the cross-section without irregularities are randomly dispersed, so that the cross-sections of the irregular-shaped cross-sections can be prevented, and the dry texture and the water absorption and diffusivity due to the gap between the single yarns can be made possible. it can.

  In the present invention, the mixing ratio of the filament yarn having a cross-sectional shape having a recess and the filament yarn having a cross-sectional shape not having a recess is preferably 20:80 to 80:20. More preferably, it is 40: 60-60: 40. By making the ratio of the filament yarn of the cross-sectional shape having the recesses 80% or less, it is possible to prevent the feeling of roughness when the number of twists is increased due to the effect of the unevenness of the cross-sectional shape, and conversely 20% or more. This prevents a peculiar slime feeling in the cross-sectional shape having no recess, and provides a smooth and dry texture.

  Next, in the combined state of the filament yarn having a cross-sectional shape having a concave portion and the filament yarn having a cross-sectional shape not having a concave portion, it is important that the filament yarns having respective cross-sectional shapes are randomly mixed. FIG. 11 is a schematic side view showing an example of the mixed fiber composite fiber of the present invention. Further, FIG. 11 shows a configuration in which confounding by an interlace nozzle is given. On the other hand, FIG. 12 is a schematic side view showing a conventional alternately twisted core sheath two-layer structured yarn, and FIG. 13 is a schematic side view showing a conventional core-sheath multilayer structured yarn. 12 and 13 have a two-layer structure with a core yarn represented by a thick line and a sheath yarn represented by a thin line.

  As shown in FIG. 11 or FIG. 10, the mixed yarn of the present invention is such that each cross-sectional shape of the yarn is dispersed in a random state on the outer layer and the inner layer. Since each cross-sectional shape is dispersedly arranged, a smooth dry feeling is obtained by a combined effect of a cross section having a recess and a cross section having no recess. Also, since the filament yarn having a cross-sectional shape having a concave portion and the filament yarn having a cross-sectional shape not having a concave portion are dispersed in a random state, when the number of additional twists is increased, the engagement between the concave portion and the concave portion hardly occurs. This is because a decrease in sex can be prevented and a feeling of swelling can be maintained.

  On the other hand, in the case of a composite yarn having a core-sheath two-layer structure formed by collecting filament yarns having respective cross-sectional shapes, it is not preferable because a smooth dry feeling due to a harmonized composite effect cannot be obtained.

  Next, the polyester multifilament yarn of the present invention will be described. In the polyester filament yarn of the present invention, it is important that 0.1 to 6 mol% of 5-sulfoisophthalic acid metal salt and 0.1 to 5 wt% of polyethylene glycol having a weight average molecular weight of 200 to 6000 are copolymerized. is there. When 0.1 to 6 mol% of the metal salt of 5-sulfoisophthalic acid is 0.1 mol% or more, the dyeing amount of the cationic dye is increased, and the color developability is improved. On the other hand, when the amount of copolymerization becomes too large, the melt viscosity of the polymer increases greatly, which is accompanied by an increase in filtration pressure and a decrease in spinnability. For this reason, it is important that the copolymerization amount of 5-sulfoisophthalic acid metal salt is 6 mol% or less. Furthermore, it is preferable that it is 0.5-2 mol%. At the same time, the copolymerization amount of polyethylene glycol having a weight average molecular weight of 200 to 6000 is 0.1% by weight or more, so that the dyeing amount of the cationic dye is increased. Suppresses the thickening effect of salt. On the other hand, if the amount of copolymerization is too large, the heat resistance of the polymer is reduced, the strength and elongation of the fiber is lowered, and the color tone is deteriorated. Preferably it is 0.5-4 weight%, and 1-2 weight% is more preferable especially. In addition, when the weight average molecular weight of polyethylene glycol is too large, it is easy to form a lump in polyester without copolymerization, and when it is too small, the dyeability is poor. Therefore, the weight average molecular weight of polyethylene glycol is preferably 2000 to 4000.

  The metal salt of 5-sulfoisophthalic acid metal salt defined in the present invention includes sodium salt and lithium salt, among which sodium salt is preferable.

  Other dicarboxylic acids such as adipic acid, isophthalic acid, sebacic acid, phthalic acid, naphthalenedicarboxylic acid, 4,4′-diphenyldicarboxylic acid, cyclohexanedicarboxylic acid, and ester-forming derivatives thereof, diethylene glycol, hexamethylene glycol, neopentyl Dioxy compounds such as glycol and cyclohexanedimethanol, oxycarboxylic acids such as p- (β-oxyethoxy) benzoic acid, and ester-forming derivatives thereof may be copolymerized.

  In the polyester multifilament yarn of the present invention, it is important that the antimony compound is not contained or the content of the polyester in terms of antimony atoms is 30 ppm or less. By setting it within this range, the generation of foreign particles can be suppressed, the generation of the base stain during molding and the increase in filtration pressure can be reduced, and more stable spinning can be achieved. For this reason, the decrease in workability and the like is reduced, and the quality is improved. In addition, a relatively inexpensive polymer can be obtained. More preferably, it is 10 ppm or less.

  Although not particularly limited as a polymerization catalyst in place of antimony, a titanium compound is preferable, and at least a carbonyl group, a carboxyl group or an ester group selected from the group consisting of functional groups represented by the following formulas 1 to 5 The titanium compound which is at least 1 type to contain is mentioned.

(In Formula 1 to Formula 5, R _{1 to} R ₃ each independently have hydrogen, a hydrocarbon group having 1 to 30 carbon atoms, an alkoxy group, a hydroxyl group, a carbonyl group, an acetyl group, a carboxyl group, an ester group, or an amino group. This represents a hydrocarbon group having 1 to 30 carbon atoms, and the titanium compound contains at least a carbonyl group, a carboxyl group or an ester group.)
Formula 1 includes functional groups composed of hydroxy polyvalent carboxylic acid compounds such as lactic acid, malic acid, tartaric acid, and citric acid.

  Formula 2 includes a functional group composed of a β-diketone compound such as acetylacetone and a ketoester compound such as methyl acetoacetate and ethyl acetoacetate.

  Moreover, as Formula 3, the functional group which consists of phenoxy, cresylate, salicylic acid, etc. is mentioned.

  Formula 4 includes acylate groups such as lactate and stearate, phthalic acid, trimellitic acid, trimesic acid, hemimellitic acid, pyromellitic acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, sebacin Polycarboxylic acid compounds such as acid, maleic acid, fumaric acid, cyclohexanedicarboxylic acid or their anhydrides, ethylenediaminetetraacetic acid, nitrilotripropionic acid, carboxyiminodiacetic acid, carboxymethyliminodipropionic acid, diethylenetriaminopentaacetic acid And functional groups composed of nitrogen-containing polyvalent carboxylic acids such as triethylenetetraminohexaacetic acid, iminodiacetic acid, iminodipropionic acid, hydroxyethyliminodiacetic acid, hydroxyethyliminodipropionic acid, and methoxyethyliminodiacetic acid.

  Formula 5 includes functional groups composed of aniline, phenylamine, diphenylamine, and the like.

  Among these, the inclusion of Formula 1 and / or Formula 4 is preferable from the viewpoint of the thermal stability and color tone of the polymer.

  Examples of the titanium compound include titanium diisopropoxybisacetylacetonate and titanium triethanolamate isopropoxide containing two or more of the substituents represented by formulas 1 to 5.

  It should be noted that conventionally known alkoxytitanium compounds containing no carbonyl group, carboxyl group and ester group, such as tetraisopropoxytitanium and tetrabutoxytitanium, are not included in Formula 1 of the present invention.

The catalyst of the present invention is a polymer synthesized from a dicarboxylic acid or an ester-forming derivative thereof and a diol or an ester-forming derivative thereof. All or some of the following reactions (1) to (3) Refers to a compound that substantially contributes to the promotion of the reaction.
(1) Esterification reaction which is reaction of dicarboxylic acid component and diol component (2) Transesterification reaction which is reaction of ester-forming derivative component of dicarboxylic acid and diol component (3) Substantially ester reaction or transesterification Polycondensation reaction in which the reaction is completed and the resulting polyalkylene terephthalate low polymer is depolymerized to increase the degree of polymerization. Accordingly, titanium oxide particles generally used as inorganic particles in fiber matting agents, etc. Has substantially no catalytic action on the above reaction and is different from the titanium compound that can be used as the catalyst of the present invention.

  The titanium compound (excluding titanium oxide particles) in the present invention is preferably contained in an amount of 0.5 to 150 ppm in terms of titanium atom with respect to the obtained polymer. When it is 1 to 100 ppm, the thermal stability and color tone of the polymer become better, and it is more preferably 3 to 50 ppm.

  The polyester multifilament yarn of the present invention preferably contains 0.1 to 400 ppm of a phosphorus compound in terms of phosphorus atoms with respect to the polyester together with the titanium compound. In addition, from the viewpoint of thermal stability and color tone of the polyester during yarn production, 1 to 200 ppm is preferable, and 3 to 100 ppm is more preferable.

  In the polyester obtained by adding at least a specific titanium compound and a phosphorus compound of the present invention, the specific phosphorus compound used is represented by the following formula 6.

(In the above formula 6, R ₁ represents hydrogen, a hydrocarbon group having 1 to 50 carbon atoms, a hydroxyl group or an alkoxy group having 1 to 50 carbon atoms, and has two or more with respect to the benzene ring. The hydrocarbon group may contain an alicyclic structure such as cyclohexyl, an aliphatic branched structure, and an aromatic ring structure such as phenyl or naphthyl, and R ₂ and R ₃ are each independently An alkoxy group that represents a hydrocarbon group having 1 to 50 carbon atoms, including a hydrocarbon group having 1 to 50 carbon atoms, a hydroxyl group, or an alkoxy group and that is —OR ₂ or —OR ₃ with respect to a phosphorus atom may be used. The hydrocarbon group may contain an alicyclic structure such as cyclohexyl, an aliphatic branched structure, and an aromatic ring structure such as phenyl or naphthyl, L + M + N = 3, and L is an integer of 1 to 3. , M and N are integers from 0 to 2 .)
Examples of the phosphorus compound represented by the above formula 6 include phosphites, alkyl diarylphosphites, aryl diarylphosphites, dialkylarylphosphonites, and arylarylphosphonites. A phosphite is preferable from the viewpoint of stability and color tone improvement. Specifically, as a phosphorus compound having no cyclic structure, triphenyl phosphite, tris (4-monononylphenyl) phosphite, trimethyl phosphite as a compound of L = 3, M = 0, and N = 0 in formula 6 (Monononyl / dinonyl phenyl) phosphite, tris (2,4-di-tert-butylphenyl) phosphite, etc., and monooctyl diphenyl phosphite as a compound of L = 2, M = 1, and N = 0 Monodecyldiphenyl phosphite, bis [2,4-bis (1,1-dimethylethyl) -6-methylphenyl] ethyl phosphite, tetrakis (2,4-di-tert-butylphenyl) 4,4′- Biphenylene diphosphite and the like, and dioctyl monophenyl phosphite, di = 1 as a compound of L = 1, M = 1 and N = 1 Examples include decyl monophenyl phosphite. Among them, tris (2,4-di-tert-butylphenyl) phosphite represented by the following formula 7 is preferable. This compound is available as “ADK STAB” (registered trademark) 2112 (Asahi Denka Co., Ltd.) or “IRGAFOS” (registered trademark) 168 (Ciba Specialty Chemicals).

  Moreover, it is preferable that the phosphorus compound represented by Formula 6 is a compound which has a 6-membered ring structure or more containing a phosphorus atom from a viewpoint of thermal stability and a color tone improvement. Specific phosphorus compounds include bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol-di-phosphite, bis (2) as compounds of L = 1, M = 1, and N = 1. 2,4-di-tert-butylphenyl) pentaerythritol-di-phosphite, 3,9-bis (2,4-dicumylphenoxy) -2,4,8,10-tetraoxa-3,9-diphosphaspiro [ 5,5] undecane, phenyl-neopentylene glycol phosphite, etc., and 2,2-methylenebis (4,6-di-tert-butyl as a compound of L = 2, M = 1 and N = 0 Phenyl) octyl phosphite and the like. Furthermore, the compound described in the following formula 8 is preferable from the viewpoint of thermal stability and color tone improvement.

R ₁ and R ₂ each independently represent hydrogen, a hydrocarbon group having 1 to 50 carbon atoms, a hydrocarbon group having 1 to 50 carbon atoms including a hydroxyl group or an alkoxy group, and two or more of them are present with respect to the benzene ring. It may be a different group. The hydrocarbon group in this case may contain an alicyclic structure such as cyclohexyl, an aliphatic branched structure, and an aromatic ring structure such as phenyl or naphthyl. Specific examples of the compound include bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol-di-phosphite represented by the following formula 9 and bis (2 , 4-di-tert-butylphenyl) pentaerythritol di-phosphite, 2,2-methylenebis (4,6-di-tert-butylphenyl) octyl phosphite represented by Formula 11 is preferred. These compounds of formulas 9 to 11 are “Adekastab” (registered trademark) PEP-36, “Adekastab” (registered trademark) PEP-24G, and “Adekastab” (registered trademark) HP-10, respectively. Formula 10 is available from Ciba Specialty Chemicals as “IRGAFOS” ® 126. These compounds may be used alone or in combination.

  When adding the specific phosphorus compound of this invention, it is preferable to make it the state which dissolved or disperse | distributed the phosphorus compound in diol components, such as said ethylene glycol.

  In addition, you may add phosphorus compound other than Chemical formula 6 from the viewpoint of thermal stability and a color tone improvement to the phosphorus contained in the polyester of this invention. Examples of such phosphorus compounds include one or two of phosphoric acid, phosphorous acid, phosphonic acid, phosphinic acid, phosphine oxide, phosphonous acid, phosphinic acid, and phosphine compounds. It is preferable. Specifically, for example, phosphoric acid, trimethyl phosphate, triethyl phosphate, triphenyl phosphate and the like phosphoric acid series, phosphorous acid, trimethyl phosphite, triethyl phosphite, triphenyl phosphite and the like. Phosphoric acid, methylphosphonic acid, ethylphosphonic acid, propylphosphonic acid, isopropylphosphonic acid, butylphosphonic acid, phenylphosphonic acid, benzylphosphonic acid, tolylphosphonic acid, xylylphosphonic acid, biphenylphosphonic acid, naphthylphosphonic acid, anthryl Phosphonic acid, 2-carboxyphenylphosphonic acid, 3-carboxyphenylphosphonic acid, 4-carboxyphenylphosphonic acid, 2,3-dicarboxyphenylphosphonic acid, 2,4-dicarboxyphenylphosphonic acid, 2,5-dicarboxy Phenylphosphonic acid, 2,6-dicarboxyl Nylphosphonic acid, 3,4-dicarboxyphenylphosphonic acid, 3,5-dicarboxyphenylphosphonic acid, 2,3,4-tricarboxyphenylphosphonic acid, 2,3,5-tricarboxyphenylphosphonic acid, 2,3 , 6-tricarboxyphenylphosphonic acid, 2,4,5-tricarboxyphenylphosphonic acid, 2,4,6-tricarboxyphenylphosphonic acid, methylphosphonic acid dimethyl ester, methylphosphonic acid diethyl ester, ethylphosphonic acid dimethyl ester, ethyl Phosphonic acid diethyl ester, phenylphosphonic acid dimethyl ester, phenylphosphonic acid diethyl ester, phenylphosphonic acid diphenyl ester, benzylphosphonic acid dimethyl ester, benzylphosphonic acid diethyl ester, benzylphosphonic acid diester Phenyl ester, lithium (ethyl 3,5-di-tert-butyl-4-hydroxybenzylphosphonate), sodium (ethyl 3,5-di-tert-butyl-4-hydroxybenzylphosphonate), magnesium bis (3 Ethyl 5-di-tert-butyl-4-hydroxybenzylphosphonate), calcium bis (3,5-di-tert-butyl-4-hydroxybenzylphosphonate), diethylphosphonoacetic acid, methyl diethylphosphonoacetate, Phosphonic acid compounds such as ethyl diethylphosphonoacetate, hypophosphorous acid, sodium hypophosphite, methylphosphinic acid, ethylphosphinic acid, propylphosphinic acid, isopropylphosphinic acid, butylphosphinic acid, phenylphosphinic acid, tolylphosphinic acid Xylylphosphinic acid, Biphenylylphosphinic acid, diphenylphosphinic acid, dimethylphosphinic acid, diethylphosphinic acid, dipropylphosphinic acid, diisopropylphosphinic acid, dibutylphosphinic acid, ditolylphosphinic acid, dixylphosphinic acid, dibiphenylylphosphinic acid, naphthylphosphinic acid, Anthrylphosphinic acid, 2-carboxyphenylphosphinic acid, 3-carboxyphenylphosphinic acid, 4-carboxyphenylphosphinic acid, 2,3-dicarboxyphenylphosphinic acid, 2,4-dicarboxyphenylphosphinic acid, 2,5- Dicarboxyphenylphosphinic acid, 2,6-dicarboxyphenylphosphinic acid, 3,4-dicarboxyphenylphosphinic acid, 3,5-dicarboxyphenylphosphinic acid, 2,3,4-trica Boxyphenylphosphinic acid, 2,3,5-tricarboxyphenylphosphinic acid, 2,3,6-tricarboxyphenylphosphinic acid, 2,4,5-tricarboxyphenylphosphinic acid, 2,4,6-tricarboxy Phenylphosphinic acid, bis (2-carboxyphenyl) phosphinic acid, bis (3-carboxyphenyl) phosphinic acid, bis (4-carboxyphenyl) phosphinic acid, bis (2,3-dicarboxylphenyl) phosphinic acid, bis ( 2,4-dicarboxyphenyl) phosphinic acid, bis (2,5-dicarboxyphenyl) phosphinic acid, bis (2,6-dicarboxyphenyl) phosphinic acid, bis (3,4-dicarboxyphenyl) phosphinic acid, Bis (3,5-dicarboxyphenyl) phosphinic acid, bis (2,3 4-tricarboxyphenyl) phosphinic acid, bis (2,3,5-tricarboxyphenyl) phosphinic acid, bis (2,3,6-tricarboxyphenyl) phosphinic acid, bis (2,4,5-tricarboxyphenyl) ) Phosphinic acid and bis (2,4,6-tricarboxyphenyl) phosphinic acid, methylphosphinic acid methyl ester, dimethylphosphinic acid methyl ester, methylphosphinic acid ethyl ester, dimethylphosphinic acid ethyl ester, ethylphosphinic acid methyl ester, Diethylphosphinic acid methyl ester, ethylphosphinic acid ethyl ester, diethylphosphinic acid ethyl ester, phenylphosphinic acid methyl ester, phenylphosphinic acid ethyl ester, phenylphosphinic acid phenyl ester, diphenyl Nylphosphinic acid methyl ester, diphenylphosphinic acid ethyl ester, diphenylphosphinic acid phenyl ester, benzylphosphinic acid methyl ester, benzylphosphinic acid ethyl ester, benzylphosphinic acid phenyl ester, bisbenzylphosphinic acid methyl ester, bisbenzylphosphinic acid ethyl ester, Phosphinic acids such as bisbenzylphosphinic acid phenyl ester, trimethylphosphine oxide, triethylphosphine oxide, tripropylphosphine oxide, triisopropylphosphine oxide, tributylphosphine oxide, phosphine oxides such as triphenylphosphine oxide, methylphosphonous acid, ethyl Phosphonous acid, propylphosphonous acid, isopropyl phosphite Phosphonic acid series such as phonic acid, butylphosphonous acid, phenylphosphonous acid, methylphosphinic acid, ethylphosphinic acid, propylphosphinic acid, isopropylphosphinic acid, butylphosphinic acid, phenylphosphinic acid, dimethyl Phosphinic acid, diethylphosphinic acid, dipropylphosphinic acid, diisopropylphosphinic acid, dibutylphosphinic acid, diphenylphosphinic acid and other phosphinic acid systems, methylphosphine, dimethylphosphine, trimethylphosphine, methylphosphine, diethylphosphine, Examples include phosphines such as triethylphosphine, phenylphosphine, diphenylphosphine, and triphenylphosphine, and these phosphorus compounds may be used alone or in combination.

  Specific solvents for the polyester polymerization catalyst of the present invention include water, methanol, ethanol, ethylene glycol, propanediol, butanediol, benzene and xylene, and any one or two of these may be used. preferable. Further, from the viewpoint of thermal stability and color tone, an acidic compound such as hydrochloric acid, sulfuric acid, nitric acid, p-toluenesulfonic acid, 2- (N- Good buffer such as (morpholino) ethanesulfonic acid (pH = 5.6 to 6.8), N- (2-acetamido) iminodiacetic acid (pH = 5.6 to 7.5) or the above phosphorus compound is used. May be.

  The method for synthesizing a catalyst for polyester polymerization of the present invention is as follows. (1) A titanium compound is mixed with a solvent, and a part or all of the titanium compound is dissolved in the solvent. To do. (2) When using a ligand of a titanium compound such as the hydroxycarboxylic acid compound or the polyvalent carboxylic acid compound, the titanium compound or the ligand compound is mixed in a solvent and a part or all of the mixture is in the solvent. In this mixed solution, the ligand compound or titanium compound is dissolved and diluted in a stock solution or solvent and added dropwise. In addition, it is preferable from the viewpoint of thermal stability and color tone improvement that a phosphorus compound is further dissolved and diluted in a stock solution or a solvent and added dropwise to the mixed solution. Said reaction conditions are performed by heating at the temperature of 0-200 degreeC for 1 minute or more, Preferably it is 2-100 minutes at the temperature of 20-100 degreeC. The reaction pressure at this time is not particularly limited, and may be normal pressure. The mixed solvent is charged into a reaction apparatus equipped with a thermometer and a stirring blade, and is stirred and mixed at a temperature of 0 to 200 ° C. for 1 minute or longer, preferably at a temperature of 10 to 100 ° C. for 2 to 60 minutes.

  The polyester polymerization catalyst of the present invention may be added to the polyester reaction system as it is, but the compound is mixed with a solvent containing a diol component that forms a polyester such as ethylene glycol or propylene glycol in advance, If it is made into a slurry and, if necessary, low boiling components such as alcohol used at the time of synthesizing the compound are removed and then added to the reaction system, foreign matter formation in the polymer is further suppressed, which is preferable. As the esterification reaction catalyst and the transesterification reaction catalyst, there are a method of adding a catalyst immediately after the addition of the raw material and a method of adding the catalyst together with the raw material. In addition, when added as a polycondensation reaction catalyst, it may be substantially before the start of the polycondensation reaction, before the esterification reaction or transesterification reaction, or after the completion of the reaction, before the polycondensation reaction catalyst is started. You may add to. Further, a phosphorus compound may be additionally added from the viewpoint of improving thermal stability and color tone. In this case, in order to suppress the deactivation of the catalyst due to the contact between the polyester polymerization catalyst of the present invention containing the titanium compound and the phosphorus compound, a method of additional addition to different reaction vessels or the same reaction vessel There are a method in which the addition interval between the polyester polymerization catalyst of the invention and the phosphorus compound is set to 1 to 15 minutes and a method in which the addition position is separated.

  Moreover, it is preferable that thermal stability and color tone of the polyester are good when the molar ratio of Ti / P = 0.1-20 as phosphorus atom (P) with respect to titanium atom (Ti) of the titanium compound. More preferably, it is Ti / P = 0.2-10, More preferably, Ti / P = 0.3-5.

  The polyester multifilament yarn of the present invention contains a manganese compound in an amount of 1 to 400 ppm in terms of manganese atom relative to the polyester, and the ratio of the manganese compound to the phosphorus compound is Mn / P = 0.1 to 200 as the molar ratio of the manganese atom to the phosphorus atom. When it exists, light resistance becomes favorable and is preferable. The manganese compound used in this case is not particularly limited. Specifically, for example, manganese chloride, manganese bromide, manganese nitrate, manganese carbonate, manganese acetylacetonate, manganese acetate tetrahydrate, manganese acetate dihydrate Etc.

  Further, in the polyester multifilament yarn of the present invention, it is preferable that the cobalt compound is further contained in an amount of 1 to 400 ppm in terms of cobalt atom with respect to the polyester because the color tone is good. The cobalt compound used in this case is not particularly limited, and specific examples include cobalt chloride, cobalt nitrate, cobalt carbonate, cobalt acetylacetonate, cobalt naphthenate, and cobalt acetate tetrahydrate.

  Further, it is preferable that the polyester multifilament yarn of the present invention further contains a blue-based adjusting agent and / or a red-based adjusting agent as a color adjusting agent, because the color tone is good.

  The color tone adjusting agent of the present invention is a dye used for a resin or the like. Specifically, in COLOR INDEX GENERIC NAME, blue color tone adjusting agents such as SOLVENT BLUE 104, SOLVENT BLUE 122, SOLVENT BLUE 45, SOLVENT RED 111, SOLVENT RED 179, SOLVENT RED 195, SOLVENT RED 135, PIGMENT RED 263, VAT RED 41, etc. Examples thereof include system color adjusting agents. Among them, SOLVENT BLUE 104, SOLVENT BLUE 45, SOLVENT RED 179, SOLVENT RED 195, SOLVENT RED 135, which do not contain halogen that tends to cause corrosion of equipment, have relatively good heat resistance at high temperatures and excellent color development, SOLVENT VIOLET 49 is preferably used.

  Further, one or more of these color tone adjusting agents can be used depending on the purpose. In particular, it is preferable to use one or more blue-type adjusting agents and red-type adjusting agents, since the color tone can be finely controlled. Furthermore, in this case, the color tone of the polyester obtained is particularly preferable when the ratio of the blue-based adjusting agent is 50% by weight or more with respect to the total amount of the color adjusting agent to be contained.

  Finally, the content of the color tone adjusting agent with respect to the polyester is preferably 30 ppm or less in total.

  In order to balance the polymer color tone, it is preferable that the contents of cobalt and the color tone adjusting agent satisfy the formula (1).

2 ≦ CL + CO / 10 ≦ 15 (1)
[However, CL in the formula represents the content (ppm) of the color adjusting agent with respect to the polyester, and CO represents the content (ppm) of the cobalt compound in terms of cobalt atom with respect to the polyester. ]
The value of the formula (1) is more preferably 4 to 10 from the viewpoint of color tone.

  Moreover, you may contain an alkali metal compound, an alkaline-earth metal compound, an aluminum compound, a zinc compound, a tin compound etc. in order to improve the thermal stability and color tone of the polymer obtained.

  It is important that the polyester multifilament yarn of the present invention contains 1 to 2% by weight of titanium oxide particles. By containing 1% by weight or more of titanium oxide particles, anti-penetration properties and UV cut properties are exhibited. On the other hand, when the content of titanium oxide particles exceeds 2% by weight, the occurrence of secondary agglomeration and the generation of foreign particles are promoted, leading to an increase in filtration pressure, process failure, and deterioration in quality. In addition, since the titanium oxide particles inhibit color development, it is important that the content is 2% by weight or less. The amount is preferably 1.3 to 1.7% by weight, and particularly preferably 1.4 to 1.6% by weight in order to develop a novel texture with a milky feeling. Further, the titanium oxide particles used in the present invention have an average secondary particle size of 1.0 μm or less, and the integral ratio of particles of 2.0 μm or more in the particle size distribution is 5% or less. From the viewpoint of reducing wear of guides and the like, anatase type titanium oxide particles are particularly preferable in terms of color tone.

  In addition to particles such as silicon oxide, calcium carbonate, silicon nitride, clay, talc, kaolin and carbon black, additives such as anti-coloring agents, stabilizers and antioxidants may be contained.

The polyester of the present invention is of the most versatile clothing fee for synthetic fibers, a polyester mainly composed of polyethylene terephthalate.

  The intrinsic viscosity of the polyester multifilament yarn of the present invention is preferably 0.6-1. When the intrinsic viscosity is 0.6 or more, the fiber strength and elongation becomes high, so that it is possible to reduce the fineness of single yarn for the purpose of improving clothes comfort. Further, it is preferable that the intrinsic viscosity is 1 or less because the spinnability is improved.

  The strength of the polyester multifilament yarn of the present invention is preferably 3 to 5 cN / dtex. Since the polyester filament yarn of the present invention is developed for sports applications, it is desirable that the polyester filament yarn can withstand impacts such as scratches and severe stretching motion.

  It is important that the residual elongation of the polyester multifilament yarn of the present invention is 36 to 50%. When the residual elongation is 36% or more, the variation in the breaking elongation of the elastic yarn when knitted with the elastic yarn is absorbed, and the shape variation of the fabric is suppressed, so that the quality is improved. On the other hand, when the residual elongation exceeds 50%, the dyeing spots and the physical properties of the yarn are changed over time due to the decrease in oriented crystallinity. A more preferable range of residual elongation is 36 to 45%.

  The shrinkage characteristics of the polyester multifilament yarn of the present invention are preferably 6 to 10% for boiling water shrinkage and 8 to 14% for dry heat shrinkage in view of the form and dimensional stability of the fabric. The boiling water shrinkage and the dry heat shrinkage in the present invention are mainly controlled by the crystal orientation, and are particularly set by the draw ratio and the heat setting temperature. For example, the draw ratio is set so that the residual elongation of the yarn after drawing is 36 to 50%, and the heat set temperature is set in the range of 115 to 155 ° C., thereby achieving the above boiling water shrinkage rate. can do.

Diol component of the polyester multifilament yarn of the present invention, i.e., the content of dimers of the starting glycol component of the polyester Ru 1.5-1.8 wt% der. If the content of the diol component is 1.5% by weight or more, the dyeing property of the dye is improved, but if the content is too large, dyeing spots and dyeing differences occur, so the content is 1.8% by weight or less . .

  The amount of carboxyl end groups of the polyester multifilament yarn of the present invention is preferably 30 to 55 equivalent / ton. Since heat resistance falls when the carboxyl end group amount increases, it is preferably 30 to 45 equivalent / ton, more preferably 30 to 40 equivalent / ton.

  In addition, although it does not specifically limit as a means to change content of a diol component and the amount of carboxyl terminal groups, it adjusted suitably by changing polymerization catalysts, such as superposition | polymerization temperature, the raw material preparation amount of superposition | polymerization, and an alkali metal. In particular, lithium acetate is preferably used as a means for changing the content of the diol component, and the addition amount is preferably 50 to 150 ppm.

  It is important that the color tone L value of the polyester multifilament yarn of the present invention is 90-95. The color tone can be appropriately changed depending on the polymer composition, the polymerization conditions, the polymerization catalyst, the contained particle type and the compound, and the color tone L value is from 90 to 95, thereby imparting anti-penetration property and UV cut property Achieve color development with a new milky feeling for the first time. Moreover, it is preferable that the color tone b value of the polyester filament yarn of this invention is 0-8, the range of dye selection spreads at the time of dyeing | staining a fabric, and versatility becomes high. When the color tone b value is 0 to 8, the process passability of the dyeing process is stabilized and the quality is improved. Further preferable color tone b value is 0-5.

  The FYL of the polyester multifilament yarn of the present invention is preferably 0.8 or less. FYL measures the dyeing difference variation in the fiber longitudinal direction.

  As an example of means for optimizing FYL, stretching temperature can be mentioned. Particularly, in a polyester component not containing antimony of the present invention or having an atomic conversion content of 30 ppm or less, a polyester contrast using an antimony catalyst of 100 ppm or more- It is preferable to set the temperature at 2 ° C. By doing so, it is possible to suppress the variation in the stretching point. Specifically, although it depends on the stretching heat treatment time and the fineness configuration, the stretching temperature is preferably 85 to 89 ° C.

  In addition to the pigment such as carbon black, the polyester multifilament yarn of the present invention may of course contain conventionally known antioxidants, anti-coloring agents, light-proofing agents, antistatic agents and the like.

  The oil used for the polyester multifilament yarn of the present invention is preferably a fatty acid ester or a polyether oil. In particular, the cationic dyeable polyester is preferably provided with an oil agent that is particularly prone to have static electricity and that can be expected to improve smoothness and prevent fluff. Moreover, you may use together fatty acid ester and a polyether-type oil agent as needed.

  Next, the woven or knitted fabric made of the mixed yarn of the present invention will be described. The mixed fiber composite yarn of the present invention has excellent water absorption due to the effect of the shape of a combination of a yarn having no recess and a cross-sectional yarn having 3 to 8 recesses. In addition, when the alkali weight reduction treatment is performed, the water absorption is further improved by the unevenness effect on the fiber surface. The water absorption by the Bayrec method is 30 mm or more, and the diffusion rate by the dropping method is 15 seconds or less, so that the water absorption and sweat treatment properties are improved, and the wearing comfort is improved, which is preferable.

  In addition, the water absorption measurement by the Bayrec method was performed by the following method, applying the Bayrec method prescribed | regulated to JIS L 1097: 2004 "Water absorption test method of a textile product" mutatis mutandis. First, 200 mm × 25 mm test pieces are prepared as samples, and 5 pieces are taken in the transverse direction. Next, after fixing the test piece with a pin or the like on a horizontal bar supported on the water surface of a water tank containing water (specified in JIS K 0050, the temperature is 20 ° C. ± 2 ° C.), the horizontal bar Is adjusted so that the lower end of the test piece is immersed in water, and left as it is for 10 minutes. After standing, the height at which the water rises by capillary action is measured up to 1 mm on a scale, and is expressed as the average value of each of the horizontal 5 times (up to an integer). If the height of water rise is difficult to read, an aqueous solution in which a water-soluble dye is thinly dissolved in water may be used instead of water.

  Moreover, the water absorption measurement by the dropping method was carried out by the following method, applying the dropping method in JIS L 1097: 2004 “Water absorption test method for textile products”. First, five test pieces of about 200 mm × about 200 mm are collected as samples. Next, the test piece is attached to the test piece holding frame, adjusted so that the height from the surface of the test piece to the tip of the burette is 10 mm, water from the burette (specified in JIS K 0050, the temperature is 20 Measure the time from when the water droplet reaches the surface of the test piece to when the water droplet does not have a special reflection until 0.5 seconds with a stopwatch. It is expressed as the average value of (up to integer places).

  Further, the filament yarns having the respective cross-sectional shapes constitute the filament yarns having different cross-sectional shapes, but may be different polymer species within a range satisfying the purpose.

  The relationship between the single yarn fineness D1 of the filament yarn having a cross-sectional shape having no concave portion and the single yarn fineness D2 of the cross-sectional shape filament yarn having a concave portion is preferably 0.5 ≦ D2 / D1 ≦ 2.0, and both D1 and D2 are It is good that it is 1.11 dtex or more and 11.11 dtex or less. When D2 / D1 is 0.5 or more, a slime feeling can be prevented by the effect of the filament yarn having a cross-sectional shape having a recess, and when D2 / D1 is 2.0 or less, the cross-sectional shape having a recess. A smooth texture can be obtained without too much emphasis on the rough feel of the filament yarn.

  The woven or knitted fabric obtained by using the mixed yarn of the present invention has an excellent drape property that is different from the woven or knitted fabric obtained by using a composite structure false twisted yarn having a two-layer core / sheath structure, and is dry. A woven or knitted fabric with a good texture effect can be obtained.

  Next, a method for producing the mixed yarn of the present invention will be described. The blended yarn of the present invention is a polyester unstretched yarn or semi-stretched yarn in which a filament yarn having a cross-sectional shape having a concave portion and a filament yarn having a cross-sectional shape not having a concave portion are mixed, and then subjected to stretching or stretched false twisting. It is possible to obtain a polyester unstretched yarn or semi-stretched yarn that is mixed and bundled before being taken up by a take-up roller in the spinning process and mixed with filament yarns having different cross-sectional shapes. That is. Specifically, for example, it can be obtained by the steps shown in FIGS.

  FIGS. 14-16 is process schematic which shows the example of the method of obtaining the mixed fiber composite yarn of this invention, respectively. FIG. 14 shows a single die having a shape in which at least one type does not have a recess and the other shape has 3 to 8 recesses, and is composed of two or more different types of spinning holes. A method is shown in which the yarn spun from (A) is converged and refueled, and then the mixed fiber is converged by an interlace nozzle and taken up by a take-up roller.

  FIG. 15 shows a single die (B) constituted by a spinning hole having a shape having no recess, and one die (C) constituted by a spinning hole having a shape having 3 to 8 recesses. A method is shown in which the spun yarns are bundled and lubricated, then mixed with an interlace nozzle, and then picked up by a take-up roller.

  FIG. 16 shows a single die (B) composed of a spinning hole having a shape having no recess, and one of the die (C) composed of a spinning hole having a shape having 3 to 8 recesses. A method is shown in which the spun yarns are each converged and lubricated, then mixed with an interlace nozzle, and then picked up by a take-up roller.

  Among them, from the viewpoint of the mixed state and productivity of each constituent filament yarn, at least one type is a shape having no recess, and the other shape is a shape having 3 to 8 recesses, and two or more types A method of spinning a molten polyester polymer from a single spinneret composed of differently shaped spinning holes is preferable, and production is preferably performed in FIG.

  One spinneret composed of two or more differently shaped spinning holes used in the present invention is a concentric constricted hole (FIG. 17), group, for example, as shown in FIGS. Examples include those arranged (FIG. 18) and those constricted in a lattice shape (FIGS. 19 and 20). In the drawing, ◯ indicates a spinning hole having a shape having no recess, and x indicates a spinning hole having a shape having a recess.

  Meanwhile, a polyester undrawn yarn obtained by spinning a filament yarn having a concave portion and winding it once, spinning a filament yarn not having a concave portion and winding the yarn once wound, and then performing a fiber blending process. The method of drawing a semi-drawn yarn is not preferable because the mixed fiber state is not random in the outer layer and the inner layer.

  Further, from the viewpoint of improving productivity, a method of winding a plurality of yarns from a single die can be preferably employed.

  By stretching the polyester unstretched yarn or semi-stretched yarn obtained by the above method, the filament yarn of each cross-sectional shape does not substantially form a core-sheath two-layer structure, and each single yarn is in a random state. A mixed fiber composite yarn dispersed from the outer layer to the inner layer can be obtained.

  In the production method of the present invention, the filament yarn of each cross-sectional shape does not substantially form a core-sheath two-layer structure, and each single yarn is dispersed in a relatively random state from the outer layer to the inner layer, What can be done is the difference between the shape of the filament yarn having a cross-sectional shape with a concave portion and the shape of a filament yarn having a cross-sectional shape without a concave portion, depending on the cooling rate in the spinning process, the difference in spinning tension, etc. When a yarn having an orientation degree difference is obtained, and when it is drawn, a difference in drawing tension is produced between filaments having different cross-sectional shapes, and the yarn is dispersed in a random state in the outer layer and the inner layer to obtain a mixed drawn yarn. Conceivable. In addition, the obtained drawn yarn is considered to cause bulging because it exhibits different shrinkage behavior between filaments having different cross-sectional shapes during hydrothermal treatment.

  Moreover, in the manufacturing process of the mixed fiber composite yarn of the present invention, it is more effective to provide entanglement between the single yarns with an interlace nozzle after winding and before winding. Since the mixed fiber composite yarn does not have a core / sheath two-layer structure, the effect of the present invention is enhanced by increasing the mixing effect of the multifilament yarn having a cross-sectional shape having a concave portion and the multifilament yarn having a cross-sectional shape not having a concave portion. Since it can enlarge, it is preferable. Moreover, it also has the effect of improving the passability in the subsequent process of the so-called mixed fiber composite yarn. If the post-process passability is poor, the quality of the surface form of the fabric tends to be lowered when a woven or knitted fabric is obtained. The number of entanglements is preferably 10 co / m or more.

EXAMPLES Hereinafter, although an Example is given and this invention is explained in full detail, the scope of the present invention is not limited only to these Examples. In addition, the characteristic value of the raw yarn in the Examples and the woven / knitted fabric was evaluated by the method described in the best mode for carrying out the invention.
(1) Content of catalyst-derived titanium element, phosphorus element, antimony element, and cobalt element in polyester It was determined with a fluorescent X-ray elemental analyzer (manufactured by Horiba, Ltd., MESA-500W type). X-ray fluorescence analysis was performed after the following pretreatment. That is, polyester is dissolved in orthochlorophenol (5 g of polymer per 100 g of solvent), and after adding the same amount of dichloromethane as this polymer solution to adjust the viscosity of the solution, a centrifuge (rotation speed 18000 rpm, 1 hour) To settle the particles. Thereafter, only the supernatant liquid is collected by the gradient method, and the polymer is reprecipitated by adding the same amount of acetone as the supernatant liquid, and then filtered through a 3G3 glass filter (manufactured by IWAKI). After washing with acetone, the acetone was removed by vacuum drying at room temperature for 12 hours. The polymer obtained by the above pretreatment was analyzed for titanium element, phosphorus element, antimony element, and cobalt element.
(2) Intrinsic viscosity of yarn IV
Measurement was performed at 25 ° C. using orthochlorophenol as a solvent.
(3) Strength, residual elongation, and elongation difference at 50 cN load Using a Tensilon tensile tester manufactured by Toyo Baldwin Co., Ltd., measuring conditions were a sample length of 20 cm and a tensile speed of 40 cm / min, and the number of measurements was 25 times. The average value was evaluated. Further, the difference in elongation at the time of 50 cN weighting was read from the strong elongation curve of the number of measurements 25 times, and obtained from the maximum elongation-minimum elongation.
(4) FYL (variation of dyeing difference in the longitudinal direction of the fiber)
Using FYL-500SR manufactured by Toray Engineering Co., Ltd., measurement was performed at a yarn speed of 60 m / min, a measurement time of 5 minutes, and a dyeing temperature of 90 ° C., and the standard deviation values of 10 samples were averaged and evaluated.
(5) Boiling water shrinkage rate Wet heat treatment was performed in a bath at 99 ° C. for 15 minutes, and the yarn length before and after the heat treatment was evaluated by an average value of two measurements.
(6) Dry heat shrinkage rate Dry heat treatment was performed in an oven at 150 ° C. for 15 minutes, and the yarn length before and after the heat treatment was evaluated by an average value of two measurements.
(7) Color tone The mixed yarn is wound around a metal plate and measured twice with the Hunter value (L, a, b value) using SM color computer model SM-3 (manufactured by Suga Test Instruments Co., Ltd.). The average value was obtained.
(8) Spinnability Continuous spinning was performed for 168 hours (7 days), and the spinnability was determined according to the following determination method.
○: Yarn breakage rate less than 3.0% ○: Yarn breakage rate of 3.0% or more and less than 5.0% Δ: Yarn breakage rate of 5.0% or more and less than 7.0% ×: Yarn breakage rate 7.0% or more-: Evaluation not possible (9) Color development Comparative evaluation between a sample obtained by winding a mixed yarn around a metal plate and dyeing it with a red dye in the same manner as a standard sample in three stages Evaluation was made by a judgment method.
○ ○: Excellent ○: Good ×: Equivalent (10) Permeability The transmittance of 5 knitted samples of 5 cm × 5 cm was measured using SM color computer model SM-3 (manufactured by Suga Test Instruments Co., Ltd.) The average value was evaluated (n = 5).
○○: Transmittance less than 10% ○: Transmittance 10-20%
X: Transmittance 20% or more (11) Quality Texture (pearl tone, silky feeling, dry feeling, etc.), surface quality uniformity, and overall evaluation of stained spots were evaluated by five experts using a four-step evaluation method. .
◯: Excellent ○: Good △: Acceptable ×: Impossible (12) Water absorption / sweat-treatable knitted fabric Samples were evaluated according to the following three levels from the water absorption height by the birec method and the diffusion rate by the dropping method. ○○ and ○ are target levels of the present invention.
◯: Water absorption height is 50 mm or more and diffusion rate is 10 seconds or less ○: Water absorption height is 30 mm or more and less than 50 mm and diffusion rate is 15 seconds or less, or water absorption height is 30 mm or more and diffusion rate exceeds 10 seconds 15 Less than second X: Water absorption height is less than 30 mm or diffusion rate exceeds 15 seconds. “Phosphorus compound 1” in Tables 1 to 12 is bis (2,6-di-tert-butyl-4-methylphenyl) penta Erythritol-di-phosphite (Asahi Denka Co., Adeka Stub PEP-36)
“B1” is a blue color tone adjusting agent, SOLVENT BLUE 104 (manufactured by Clariant, Polysynthren Blue RBL)
“Phosphorus compound 2” described in Table 4 is phenyl phosphite (manufactured by Aldrich).
“Phosphorus compound 3” means tris (monononylphenyl) phosphite (manufactured by Aldrich)
“Phosphorus compound 4” is bis (2,4-di-tert-butylphenyl) pentaerythritol di-phosphite (Asahi Denka Co., Adeka Stub PEP24G).
“R1” described in Table 5 is a red color adjuster SOLVENT RED 135 (manufactured by Clariant, Polysynthren Red GFP).
In addition, the synthesis | combining method of catalyst AC is described below.

Catalyst A. Synthesis Method of Lactic Acid Chelate Titanium Compound (Phosphate Mixture) Titanium tetraisopropoxide (285 g, 1.00 mol) stirred in a 2 L flask equipped with a stirrer, condenser and thermometer was added from a dropping funnel to ethylene. Glycol (218 g, 3.51 mol) was added. The rate of addition was adjusted so that the heat of reaction warmed the flask contents to about 50 ° C. The reaction mixture was stirred for 15 minutes and an 85 wt / wt% aqueous solution of ammonium lactate (252 g, 2.00 mol) was added to the reaction flask to give a clear pale yellow product (Ti content 6.54 wt. %). A 85 wt / wt% aqueous solution of phosphoric acid (114 g, 1.00 mol) was added to this mixed solution to obtain a titanium compound containing a phosphorus compound (P content 4.23 wt%).

Catalyst B. Method of synthesizing citric acid chelate titanium compound (phosphoric acid mixture) Citric acid monohydrate (532 g, 2.52 mol) was added to hot water (371 g) in a 3 L flask equipped with a stirrer, condenser and thermometer. Dissolved. To this stirred solution was slowly added titanium tetraisopropoxide (288 g, 1.00 mol) from the addition funnel. The mixture was heated to reflux for 1 hour to produce a cloudy solution from which the isopropanol / water mixture was distilled under vacuum. The product was cooled to a temperature below 70 ° C., and a 32 wt / wt% aqueous solution of NaOH (380 g, 3.04 mol) was slowly added via a dropping funnel to the stirred solution. The resulting product was filtered and then mixed with ethylene glycol (504 g, 80 mol) and heated under vacuum to remove isopropanol / water and a slightly cloudy light yellow product (Ti content 3 .85% by weight). A 85 wt / wt% aqueous solution of phosphoric acid (114 g, 1.00 mol) was added to this mixed solution to obtain a titanium compound containing a phosphorus compound (P content: 2.49 wt%).

Catalyst C. Synthesis method of lactate chelate titanium compound (phenylphosphonic acid, phosphoric acid mixed) To titanium tetraisopropoxide (285 g, 1.00 mol) stirred in a 2 L flask equipped with a stirrer, condenser and thermometer Ethylene glycol (218 g, 3.51 mol) was added from the dropping funnel. The rate of addition was adjusted so that the heat of reaction warmed the flask contents to about 50 ° C. The reaction mixture was stirred for 15 minutes and an 85 wt / wt% aqueous solution of ammonium lactate (252 g, 2.00 mol) was added to the reaction flask to give a clear pale yellow product (Ti content 6.54 wt. %). To this mixed solution, phenylphosphonic acid (158 g, 1.00 mol) and an aqueous 85 wt / wt% phosphoric acid solution (39.9 g, 0.35 mol) were added to obtain a titanium compound containing a phosphorus compound. Obtained (P content 5.71% by weight).

Example 1
A slurry of 82.5 kg of high-purity terephthalic acid (manufactured by Mitsui Chemicals) and 35.4 kg of ethylene glycol (manufactured by Nippon Shokubai Co., Ltd.) was previously charged with about 100 kg of bis (hydroxyethyl) terephthalate, and the temperature was 250 ° C. The esterification reaction vessel maintained at a pressure of 1.2 × 10 ⁵ Pa was sequentially supplied over 4 hours, and after the completion of the supply, the esterification reaction was further performed over 1 hour. 5 kg was transferred to a polycondensation tank.

  Subsequently, 5 g of silicon (manufactured by Toshiba Silicone Co., TSF433) was added to the polycondensation reaction tank into which the esterification reaction product was transferred. After stirring for 5 minutes, 11.5 g of cobalt acetate (30 ppm in terms of cobalt atom relative to the polymer), 15 g of manganese acetate (33 ppm in terms of manganese atom relative to the polymer), pentaerythritol-tetrakis (3- (3,5- Di-t-butyl-4-hydroxyphenol) propionate) (Ciba Geigy, Irganox 1010) 75 g, Lithium acetate 45 g, Blue color tone adjuster SOLVENT BLUE 104 (Clariant, Polysynthren Blue RBL) 0.4 g of ethylene An ethylene glycol solution (catalyst A) consisting of a lactic acid chelate titanium compound equivalent to 10 ppm in terms of titanium atom and a phosphoric acid equivalent to 6 ppm in terms of phosphorus atom with respect to the glycol solution and the polymer, 70 ppm (phosphorus atom with respect to the polymer) A mixture of ethylene glycol slurry of bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol di-phosphite (Asahi Denka Co., Adeka Stub PEP-36) equivalent to 7 ppm in total was added. . After further stirring for 5 minutes, 1 kg of polyethylene glycol having a weight average molecular weight of 4000 (manufactured by Sanyo Chemical Industries, Ltd.) was added. After further stirring for 5 minutes, ethylene glycol solution of 5-sodium sulfoisophthalic acid hydroxyethyl ester (manufactured by Takemoto Yushi Co., Ltd., ES-740) was added so that the sulfur content relative to the polymer was 0.3%. . After further stirring for 5 minutes, ethylene glycol slurry of titanium oxide particles was added to the polymer so that the amount was 1.5% by weight in terms of titanium oxide particles, and then the reaction was conducted while stirring the low polymer at 30 rpm. The system was gradually heated from 250 ° C. to 290 ° C., and the pressure was reduced to 40 Pa. The time to reach the final temperature and final pressure was both 60 minutes. When the predetermined stirring torque was reached, the reaction system was purged with nitrogen, returned to normal pressure, the polycondensation reaction was stopped, discharged into cold water in a strand form, and immediately cut to obtain polymer pellets. The time from the start of decompression to the arrival of the predetermined stirring torque was 3 hours.

  The polymer obtained had an IV of 0.7, a color tone of L = 72, a = −2.5, b = 4.5, and a solution haze of 0.7%. Also, it was confirmed that the content of titanium atoms derived from the titanium catalyst measured from the polymer was 10 ppm, the content of phosphorus atoms was 13 ppm, Ti / P = 0.50, and the content of antimony atoms was 0 ppm. did.

  In addition, after drying this polyester, it was subjected to a spinning machine, and using a die having 12 round holes and 12 hexagonal holes as shown in FIG. 17 under a spinning temperature of 290 ° C. Spinning at a spinning speed of 1500 m / min by the process as shown in FIG. 14, an oil containing 40% by weight of fatty acid ester and 9% by weight of polyether was applied to the fiber by 1% by weight, 140 dtex-24 filament, residual elongation 300% undrawn yarn was obtained. The obtained undrawn yarn was drawn and heat-set at a drawing temperature of 87 ° C., a heat setting temperature of 145 ° C. and a magnification of 2.5 times to obtain a drawn yarn of 56 dtex-24 filament. Each yarn property is shown in the table. As a result of observing the cross section of the obtained blended yarn with an optical microscope using an embedding method, as shown in FIG. It was a filament yarn. A 28-gauge half tricot was knitted using the stretched yarn on the front and the polyurethane elastic yarn of 44 dtex on the back in a 15% mixture ratio. Next, after relaxing setting at 90 ° C. × 30 seconds, heat setting was performed at 190 ° C. × 40 seconds. Subsequently, malachite green (manufactured by Kanto Chemical Co., Inc.) 5% owf, acetic acid 0.5 g / L, bath ratio 1: 100, dyed at 125 ° C. for 30 minutes, and heat set at 160 ° C. for 40 seconds. It was. The obtained knitted fabric (Example 1) was excellent in both water absorption and sweat treatment properties, and had a dry texture, excellent anti-penetration property and color developability, and had a pearly milky feeling.

Examples 4 and 6, Comparative Examples 1 and 2

Examples 4 and 6 and Comparative Examples 1 and 2 were tested in the same manner as in Example 1 except that the amount of 5-sulfoisophthalic acid metal salt was changed.

Examples 4 and 6 were excellent in process stability, excellent in water absorption and sweat treatment properties, and had a dry texture, color development and anti-penetration.

  Comparative Example 1 was an experiment in which the copolymerization amount of the metal salt of 5-sulfoisophthalic acid was 0.05 mol%, but the color developability was inferior because the copolymerization amount was small.

  Comparative Example 2 was an experiment in which the copolymerization amount of the metal salt of 5-sulfoisophthalic acid was 7 mol%. However, since the copolymerization amount was too high, the increase in the filtration pressure was large and yarn breakage was sporadic. Further, the obtained knitted fabric was conspicuous and had poor quality. The evaluation results are shown in Table 1.

Examples 7-14, Comparative Examples 3-6
An experiment was conducted in the same manner as in Example 1 except that the weight average molecular weight and the copolymerization amount of polyethylene glycol were changed.

  In Examples 7 to 14, yarn breakage was small, water absorption and sweat treatment were excellent, dry texture, anti-peeling property and color developability, and a novel milky feeling were obtained.

  Comparative Examples 3 to 4 are experiments using polyethylene glycol having a weight average molecular weight of 100, 7000. Although the color development and the anti-peeling property were satisfied, there was fluffing and the texture was poor.

  Comparative Example 5 was an experiment in which the copolymerization amount of polyethylene glycol was 6% by weight, but the yarn-making property was relatively stable, but fluff was generated during warping and knitting because the copolymerization amount was too high. .

  Comparative Example 6 was an experiment in which polyethylene glycol was not added, but some thread breakage was observed and the color development was inferior. The evaluation results are shown in Table 2.

Examples 16 to 19, Comparative Examples 7 to 8
Implemented except changing the type and content of catalyst titanium compound (catalyst B), content of antimony trioxide (manufactured by Sumitomo Metal Mining Co., Ltd.), content of phosphoric acid, content of color modifier A knitted fabric was obtained in the same manner as in Example 1.

Each of Examples 16 to 19 was excellent in both water absorption and sweat treatment properties, dry texture, color development and anti-penetration properties, and good quality.

  Comparative Example 7 was an experiment in which 50 ppm of antimony trioxide was added, but the increase in the filtration pressure was large and yarn breakage was sporadic. Moreover, the obtained knitted fabric was fuzzy and had poor quality.

  Comparative Example 8 was an experiment in which 334 ppm of antimony trioxide and 26 ppm of phosphoric acid were added. However, since the amount of extraneous polymer increased, the filtration pressure increased and the thread breakage was remarkable, and the process stability was inferior. The evaluation results are shown in Table 3.

Examples 20 and 22
The point of using the catalyst C which consists of a lactic acid chelate compound, phenylphosphonic acid, and phosphoric acid for a catalyst, bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol-di-phosphite (phosphorus compound 1) A knitted fabric was obtained in the same manner as in Example 1 except that phenylphosphite (phosphorus compound 2) and tris (monononylphenyl) phosphite (phosphorus compound 3) were used instead. The obtained knitted fabric was excellent in quality and quality as in Example 1, and the yarn-making property was stable. The evaluation results are shown in Table 4.

Examples 24-31
Experiments were performed in the same manner as in Example 1 except that the types and contents of the cobalt compound and the color tone adjusting agent were changed. The obtained knitted fabric was excellent in water absorption and sweat treatment properties, had a dry texture, and was a high-quality knitted fabric that achieved both waterproofness and color development. The evaluation results are shown in Table 5.

Examples 32-37, Comparative Examples 9-10
The experiment was performed in the same manner as in Example 1 except that the content of the titanium oxide particles was changed.

  Examples 32 to 37 were all excellent in water absorption and sweat treatment properties, and had both a dry texture, anti-peeling property and color developability, and in particular, the content of titanium oxide particles was excellent in 1.4 to 1.6.

  Comparative Example 9 was an experiment in which the content of titanium oxide particles was 0.8% by weight, but was inferior in the anti-penetration property.

  Comparative Example 10 was an experiment in which the content of titanium oxide particles was 2.2% by weight, but coarse polymer foreign matter was formed, the filtration pressure increased greatly, and yarn breakage occurred frequently. Further, the obtained knitted fabric had low color developability. The evaluation results are shown in Table 6.

Example 38 to 42, 44 to 48
The polymerization temperature of the polymer was changed, and the intrinsic viscosity, the amount of carboxyl end groups, and the type and content of the diol component were changed. All experiments were excellent in process stability and were high quality and high quality knitted fabrics. Table 7 shows the evaluation results.

Example 49-52, Comparative Examples 11-12
A knitted fabric was obtained in the same manner as in Example 1 except that the stretching conditions were changed.

  Examples 49 to 51 and Comparative Examples 11 to 12 are experiments in which the draw ratio was changed and the residual elongation was changed, but Examples 49 to 51 were excellent in water absorption and sweat treatment properties and had a dry texture. Although the quality and quality were good, in Comparative Examples 11 to 12 in which the residual elongation was 34% and 52%, warp was generated in the knitted fabric, and the quality was poor.

Although Example 5 2 is an experiment that was 89 ° C. The stretching temperature, both excellent water resistance and sweat processability, have dry texture, it was excellent in color developing property and anti-transparent property. The evaluation results are shown in Table 8.

Examples 55 and 56
The experiment was performed in the same manner as in Example 1 except that the stretching heat setting temperature was changed.

Examples 55 and 56 are experiments in which the stretching heat set temperature was changed to 130 ° C. and 110 ° C., respectively, and the boiling water shrinkage rate and the dry heat shrinkage rate were changed, both of which have good process stability and excellent quality. It was. Table 9 shows the evaluation results.

Examples 57-60, Comparative Examples 13-14
An experiment was conducted in the same manner as in Example 1 except that the type and content of the color tone adjusting agent, the content of titanium oxide particles, and the spinning temperature were changed.

  Example 57 was excellent in yarn production and stable in quality. On the other hand, Comparative Example 13 was inferior in see-through property, did not have the pearly milky feeling of the present invention, and a characteristic knitted fabric could not be obtained. Further, Comparative Example 14 was a knitted fabric with low color developability and a dull color.

  Examples 58 to 60 are experiments in which the spinning temperatures were 285 ° C., 295 ° C., and 298 ° C., respectively, all of which are excellent in water absorption and sweat treatment properties, dry texture, good anti-peeling property and coloring property. Met. Table 10 shows the evaluation results.

Examples 61-62
The experiment was carried out in the same manner as in Example 1 except that the spinning speed was changed to 3000 m / min, the draw ratio was changed to 1.25 times, and the draw temperatures were changed to 88 ° C. and 90 ° C., respectively. The knitted fabric was excellent in sweat treatment, had a dry texture, anti-penetration and color development, and had good quality. The evaluation results are shown in Table 11.

Example 63
The experiment was conducted in the same manner as in Example 1 except that a die having 24 round holes and 24 leaf type holes was used. Example 63 was a knitted fabric excellent in water absorbency and sweat-treating properties, having a dry texture, anti-penetration property, and coloring property and having good quality.

Comparative Example 15
The experiment was conducted in the same manner as in Example 1 except that a die having 48 round holes was used. Comparative Example 15 was composed of a filament composed only of a cross section having no recess, and was a knitted fabric having poor water absorption and sweat treatment properties and having no dry feeling.

Comparative Example 16
The experiment was performed in the same manner as in Example 1 except that a die having 48 six-leaf type holes was used. Comparative Example 16 was composed of a filament composed only of a cross section having a concave portion, and was a knitted fabric having poor water absorption and sweat treatment properties and having no dry feeling.

Comparative Example 17
Obtained by spinning and stretching a hexalobal yarn (33 dtex 12 filaments) having 6 recesses with a polyester filament obtained by spinning and stretching a polyester having the same composition as in Example 1. A round cross-section yarn (33 dtex 12 filament) having no concave portion with a polyester filament was drawn together and subjected to a mixed fiber entanglement treatment to obtain one mixed fiber composite yarn. As a result of observing the cross section of the obtained mixed fiber composite yarn with an optical microscope using an embedding method, it was a multifilament yarn having a structure in which a round cross-sectional shape and a six-leaf cross-sectional shape were divided into two layers. A 28-gauge half tricot was knitted by using this mixed fiber composite yarn at the front and a 44 dtex polyurethane elastic yarn at the back at a 15% mixing rate. Next, after relaxing setting at 90 ° C. × 30 seconds, heat setting was performed at 190 ° C. × 40 seconds. Subsequently, malachite green (manufactured by Kanto Chemical Co., Inc.) 5% owf, acetic acid 0.5 g / L, bath ratio 1: 100, dyed at 125 ° C. for 30 minutes, and heat set at 160 ° C. for 40 seconds. It was. The obtained knitted fabric is obtained by separately spinning and drawing a cross-sectional yarn having a concave portion and a cross-sectional yarn not having a concave portion to obtain a mixed fiber composite yarn by post-mixing, and has a cross-sectional shape having a concave portion and a cross-section having no concave portion. The knitted fabric was divided into two layers, and because the gap between the single yarns was not sufficiently obtained by the engagement of the cross section having the recesses, the water absorption / sweat treatment property was poor and the dry feeling was also poor. The evaluation results are shown in Table 12.

Illustration of fiber cross section An example of a cross-sectional shape of a filament yarn having no recess An example of a cross-sectional shape of a filament yarn having no recess An example of a cross-sectional shape of a filament yarn having no recess Illustration of fiber cross section An example of a cross-sectional shape of a filament yarn having a recess An example of a cross-sectional shape of a filament yarn having a recess An example of a cross-sectional shape of a filament yarn having a recess An example of a cross-sectional shape of a filament yarn having a recess Schematic cross-section showing an example of the blended yarn of the present invention Side schematic diagram showing an example of the blended yarn of the present invention Side schematic diagram showing a conventional alternating twisted core sheath two-layer structure yarn Side schematic diagram showing a conventional core-sheath multilayer structure yarn Process schematic which shows an example of the method of obtaining the mixed fiber of this invention Process schematic which shows another example of the method of obtaining the mixed fiber of this invention Process schematic which shows another example of the method of obtaining the mixed fiber of this invention Schematic plan view showing an example of a base used in the present invention Schematic plan view showing another example of a base used in the present invention Schematic plan view showing still another example of the base used in the present invention. Schematic plan view showing still another example of the base used in the present invention.

Explanation of symbols

1: base 2: chimney 3: refueling guide 4: interlace nozzle 5: take-up roller 6: package A: one base B composed of two or more types of differently shaped spinning holes B: spinning hole having no recess One base C composed of: one base composed of a spinning hole having a shape having 3 to 8 recesses

Claims (1)

0.1 to 6 mol% of 5-sulfoisophthalic acid metal salt and 0.1 to 5% by weight of polyethylene glycol having a weight average molecular weight of 200 to 6000 are copolymerized to contain no antimony or have an atomic equivalent content of 30 ppm. hereinafter, a further polyester multifilament yarn of two or more different cross-sectional shapes consisting of 1 to 2% by weight and a diol component of titanium oxide particles of poly ethylene terephthalate containing 1.5-1.8 wt%, whereas Is a filament yarn having a cross-sectional shape having no concave portion, and the other is a filament yarn having a cross-sectional shape having three to eight concave portions, and the filament yarns having the respective cross-sectional shapes are mixed in a random state, and the color tone L A knitted or knitted fabric comprising a blended yarn characterized by a value of 90 to 95 and a residual elongation of 36 to 50%.

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