JP2006274473A - Combined filament conjugated fiber and woven or knitted fabric using the same fiber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combined filament conjugated fiber affording a dry touch feeling and having excellent drapeability and fullness feeling and further antistatic properties in combination and to provide a woven or a knitted fabric using the fiber. <P>SOLUTION: The combined filament conjugated fiber is a polyester filament yarn having two or more different cross-sectional shapes containing a specific amount of a polymer having high hydrophilicity as an antistatic agent. One thereof is a filament yarn having a cross-sectional shape without a recessed part and the other is a filament yarn having a cross-sectional shape with 3-8 recessed parts. Each filament yarn is combined in a random state. The combined filament conjugated fiber simultaneously satisfies the specific resistance and fiber surface states. The woven or knitted fabric is composed of the combined filament conjugated fiber and has ≥30 mm water absorption characteristics according to the Byreck method and ≤10 s diffusion rate according to a dropping method. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a mixed fiber composite fiber having dry touch and excellent water absorption, sweat treatment, and dry feeling. More specifically, it has antistatic properties in addition to water absorption, sweat treatment, and dry feeling. The present invention relates to a mixed fiber composite fiber and a woven or knitted fabric.

  Polyester fibers are widely used for general clothing because of their excellent properties such as mechanical properties, chemical properties, and easy care properties. However, on the other hand, polyester fiber has extremely low moisture absorption and water absorption, and when used in blouses, inners, etc., it often causes discomfort due to stuffiness, etc. A method of granting has been proposed.

  For example, a side-by-side type composite hollow thin fiber yarn having a hollow ratio of 10 to 30% comprising a polyester (component A) containing 95% or more of polyethylene terephthalate and a modified polyester (component B) having an alkali weight loss rate higher than that of the component A. In addition, due to the weight loss of the alkali, there are many transverse grooves extending in the direction perpendicular to the fiber axis on the thicker A component side and reaching the hollow portion of the fiber, and extending in the fiber axis direction on the thicker B component side. In addition, a water-absorbing polyester fabric composed of a polyester composite hollow thick fiber yarn having a longitudinal groove reaching the hollow portion of the fiber has been proposed (see Patent Document 1).

  Further, there has been proposed a flat deformed cross-sectional yarn having two or more concave portions having a corrugated cross section and an opening angle θ of the concave portion in a range of 60 ° ≦ θ ≦ 160 ° (see Patent Document 2). However, although such highly deformed cross-section yarns have high water absorption, on the other hand, because the degree of deformity is high, the irregularly shaped recesses mesh with each other, resulting in a decrease in the gap between single yarns, and the texture becomes stiff, There is a problem that the sexual effect is lowered.

  From such knowledge, at least one type of filament yarn of polyester multifilament yarn composed of two or more types of filament yarns having different cross-sectional shapes formed by false twisting, filament yarns having a cross-sectional shape having no recesses, and others The filament yarn of 3 to 8 has a mixed fiber composite yarn in which the filament yarn having a cross-sectional shape having 3 to 8 recesses is dispersed and mixed in a random state in the outer layer and the inner layer (see Patent Document 3). The fabric made of mixed yarn has a cross section with no recesses and a cross section with recesses randomly distributed, so that the irregular cross sections do not mesh with each other, improving the water absorption by water absorption and diffusion using capillary action. It was found that a dry texture was obtained. In addition, since two or more kinds of cross-sectional shapes are mixed, when this mixed yarn is treated with hot water, it shows different shrinkage behavior between filaments, and it was found that a bulge and a soft feeling can be obtained.

  However, polyester fibers are more hydrophobic than natural fibers such as wool and silk, fiber fibers such as rayon and acetate, and acrylic fibers, so they are more likely to generate static electricity. There is a drawback that cluttering occurs.

Therefore, although softness, drape, water absorption, and dry feeling can be obtained, there is a drawback that a product having antistatic properties (preventing generation of static electricity) cannot be obtained. In order to improve such a defect, for example, by performing a specific dry heat treatment on a fiber comprising an organic sulfonic acid metal salt and a polyester containing a polyalkylene glycol having an average molecular weight of 5000 to 50000, an alkali weight reduction treatment is performed. A polyester fiber in which streak-like grooves are formed on the fiber surface and irregular voids are formed inside the fiber has been proposed (see Patent Document 4). However, although it was possible to have water absorption, dry feeling, and antistatic properties, it was not possible to obtain a water absorption level that was so high. Since voids are formed, there is a problem in that a fabric having sufficient fabric strength cannot be obtained and durability is inferior.
JP-A-5-295633 (2nd page, FIG. 2) Japanese Patent Laid-Open No. 62-6983 (2nd page, FIG. 1) JP-A-6-25930 (pages 2 and 3) JP-A-7-150468 (2nd page)

  An object of the present invention is to solve the above-mentioned conventional problems, and it is possible to obtain a dry texture, an excellent draping property, a swelling feeling, and a mixed fiber composite having antistatic properties. The object is to provide a fiber and a woven or knitted fabric using the fiber.

In order to solve the above problems, the present invention employs the following configuration. That is, polyester filament yarns having two or more different cross-sectional shapes containing 0.2 to 5% by weight of a highly hydrophilic polymer as an antistatic agent, one of which is a filament yarn having a cross-sectional shape having no recess, and the other being It is a filament yarn having a cross-sectional shape having 3 to 8 recesses, each of the filament yarns having a cross-sectional shape being mixed in a random state, and satisfies the following (1) and (2) simultaneously A mixed fiber composite fiber characterized by
(1) The specific resistance of the mixed fiber is 10 × 10 ^{8 to} 1000 × 10 ⁸ Ω · cm.
(2) The fiber surface has a number of streaks made of an antistatic agent oriented in the fiber axis direction, the width of the streaks is 0.1 to 3 μm, and the distance between adjacent streaks is 2 μm or less.

  Further, a woven or knitted fabric made of the mixed fiber composite fiber, having a water absorption property of 30 mm or more by the Bayrec method and a diffusion rate of 10 seconds or less by the dropping method.

  According to the present invention, it is possible to provide a mixed fiber composite fiber that has drape and dryness even when raw silk is used, and that is further imparted with good antistatic properties and water absorption, and a woven or knitted fabric using the fiber. . In particular, when deployed on ladies' blouses, dresses, suit linings, etc., not only an elegant silhouette can be obtained, but also due to the synergistic effect of the cross-sectional shape of the raw yarn and the hydrophilic antistatic agent present on the fiber surface. It exhibits an extremely excellent water absorption and hygroscopic effect and is free from the sticky feeling caused by sweat. In addition to providing a feeling of dryness due to the antistatic property, it is possible to suppress unpleasant clothing clinging and dust adhesion due to generation of static electricity. In particular, the inner material of the winter season can suppress unpleasant discomfort caused by static electricity, and a dry wearing feeling can be obtained, which can provide an inner material with unprecedented wearing comfort.

  The present invention is described in further detail below.

  The mixed fiber composite fiber of the present invention will be described. The mixed fiber composite fiber according to the present invention uses a cross-sectional shape of a filament yarn, a structure of the composite state, and a polymer containing an antistatic agent, which improves a unique dry feeling, water absorption, and sweat treatment, Antistatic properties are imparted by the effect of the agent-containing polymer.

  The mixed fiber conjugate fiber 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 filament yarn is made of a filament yarn having a cross-sectional shape without a recess, and the other filament yarn is made of a cross-sectional shape filament yarn having 3 to 8 recesses Has been.

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. However, the raw yarn does not have a recess (a cross-sectional shape having no plurality of contacts), and includes a cross-sectional shape partially recessed due to contact with an adjacent yarn during false twisting. 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, which may be symmetric or asymmetric, 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 a cross-sectional shape having recesses, when the number of recesses is less than 3 or more than 8, it is not preferable because the dry feeling cannot be obtained as the texture of the fabric.

  In the present invention, the degree of irregularity of the filament yarn having the recesses is set to 10 or more and 50 or less, so that inter-fiber voids are secured, water absorption due to the capillary effect and sweat treatment property are improved, and the tension stiffness, drape Sex is also imparted. In addition, this highly deformed cross section eliminates the slime characteristic peculiar to polyester, and a smooth dry touch can be obtained.

The degree of irregularity referred to here is obtained by the following equation from the distance (H) from the most concave point (U) of the recess in FIG. 5 to the tangent S ₂ -S ₃ and the distance (D) between the contacts S ₂ and S _3. This is a calculated value.

Deformity = (H / D) × 100
FIG. 10 is a schematic sectional view showing an example of the mixed fiber composite 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 having no recesses are randomly dispersed, so that the cross-sections of the irregular-shaped cross-sections can be prevented, and a dry texture and water absorption and diffusibility can be made possible by the gap between the single yarns. it can.

  In this invention, it is preferable that the mixing ratio converted into the fineness of the filament yarn of the cross-sectional shape which has a recessed part, and the filament yarn of the cross-sectional shape which does not have a recessed part is 20: 80-80: 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, 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. 10 or FIG. 11, the mixed fiber conjugate fiber according to the present invention has the cross-sectional shape of the yarn dispersed in a random state in 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.

  Examples of the polyester of the present invention include polyalkylene terephthalate and polyalkylene phthalate. Among them, the former terephthalic acid is the main acid component, and the alkylene glycol component having 2 to 6 carbon atoms, that is, ethylene glycol, trimethylene glycol, tetra Polyester having at least one glycol selected from methylene glycol, pentamethylene glycol and hexamethylene glycol as a main glycol component is intended.

  In this polyester, the terephthalic acid component may be replaced with another bifunctional carboxylic acid component. Examples of such carboxylic acids include bifunctional aromatic carboxylic acids such as isophthalic acid, phthalic acid, dibromoterephthalic acid, naphthalene dicarboxylic acid, diphenylcarboxylic acid, diphenoxyethanecarboxylic acid, and β-oxyethoxybenzoic acid. Can do.

  A 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) ethoxy) phenyl] propane, and aliphatic, alicyclic and aromatic diols.

  Further, the above-described polyester may be obtained by blending and melting a small amount of other polymers as required, or by using a small proportion of a chain branching agent such as pentaerythritol, trimethylolpropane, or trimellitic acid. In addition to the pigments such as titanium oxide and carbon black, the polyester of the present invention may of course be added with conventionally known antioxidants, anti-coloring agents and the like in the same manner as ordinary polyesters.

  In the present invention, the amount of the antistatic agent contained in the polyester is 0.2% by weight or more and 5% by weight or less based on the polyester. Especially preferably, it is 0.5 to 3 weight%. If it is less than 0.2% by weight, the antistatic property of the obtained polyester fiber is insufficient, and if it exceeds 5% by weight, not only will it cause yarn malfunction such as thread breakage during yarn production, but the yellowness of the fiber will increase. This is not preferable.

The polyester mixed fiber composite fiber of the present invention is made of polyester having the above-mentioned composition, and the specific resistance of the mixed fiber is 10 × 10 ⁸ Ω · cm or more and 1000 × 10 ⁸ Ω · cm or less. The specific resistance value (hereinafter abbreviated as R) is about 2200 dtex by bundling the filament yarn, and after using a weak anionic detergent and thoroughly refining it to remove the oil, etc., it is 20 ° C. and 43% RH (relative humidity). This can be obtained by measuring the resistance at both ends after standing for 24 hours in the state, which greatly affects the antistatic property of the woven or knitted fabric. If R is less than 10 × 10 ⁸ Ω · cm, the antistatic component in the polyester mixed fiber composite fiber is localized, and the fiber of the mixed fiber is liable to occur, and the fabric quality after dyeing is remarkably lowered. On the other hand, when R exceeds 1000 × 10 ⁸ Ω · cm, the antistatic property is hardly exhibited and the object of the present invention cannot be achieved. The specific resistance of the mixed fiber is more preferably 500 × 10 ⁸ Ω · cm or less.

  The polyester mixed fiber composite fiber of the present invention has a large number of streaks made of an antistatic agent oriented in the fiber axis direction on the fiber surface, the width of the streaks is 0.1 μm or more and 3 μm or less, and the spacing between adjacent streaks is 2 μm. It is as follows. Here, having a lot of streaks made of an antistatic agent oriented in the fiber axis direction on the fiber surface means that when the side surface of the fiber obtained by reducing the polyester fiber by 15% with a weak alkaline aqueous solution is observed with a scanning electron microscope, This means a state in which a large number of groove-like grooves are present in the fiber axis direction, and the width of the stripe means the width of the stripe-like groove. The distance between adjacent streaks refers to the distance between adjacent streak grooves on the side of the fiber that the straight line crosses when 5 straight lines perpendicular to the fiber axis direction are drawn randomly on the side of the reduced fiber. It means the value measured and averaged.

  If the width of the streak is less than 0.1 μm, the antistatic property and water absorption of the resulting polyester fiber are insufficient, and if it exceeds 3 μm, the antistatic property and water absorption are good, but dyeing spots are produced and the dyeing quality is high. Invite the deterioration. The width of the stripe is more preferably 0.3 μm or more and 2.5 μm or less.

  Further, the length of the muscle is not particularly limited, but it is preferably 5 μm or more and 100 μm or less because the antistatic property is good. Here, the length of the streak is the fiber axis direction of the streak-like grooves existing in the fiber axis direction when the side surface of the fiber obtained by reducing the polyester fiber by 15% with a weak alkaline aqueous solution is observed with a scanning electron microscope. Means the length of

  Examples of the polymer used as an antistatic agent in the present invention include polyalkylene ethers (polyalkylene oxides) such as a condensation product of ethylene oxide and propylene oxide, or a condensation product of both, and an aminocarboxylic acid or lactam as a polyalkylene oxide component. , Block copolymer such as polyether amide, polyether ester, polyether ester amide and the like obtained by reacting diamine, dicarboxylic acid, dicarboxylic acid ester and the like. Of these, polyether ester amide is preferable.

  As the polyether ester amide, as the component (A) aminocarboxylic acid, or lactam or diamine and dicarboxylic acid salt, aminocarboxylic acid having 6 or more carbon atoms, or lactam or diamine having 6 or more carbon atoms and Salts of dicarboxylic acids are preferred, more preferably ω-aminocaprylic acid, ω-aminoberconic acid, ω-aminocaproic acid, and aminocarboxylic acids such as 11-aminoundecanoic acid, 12-aminododecanoic acid or caprolactam, enanthractam, Lactams such as capryl lactam and laurolactam and diamine-dicarboxylic acid salts such as hexamethylenediamine-adipate, hexamethylenediamine-sebacate, and hexamethylenediamine-isophthalic acid are used. Tam, 1,2-aminododecanoic acid, hexamethylenediamine - adipate is more preferably used.

  The poly (alkylene oxide) glycol (B), which is a constituent of the polyether ester amide, includes polyethylene glycol, poly (1,2-propylene oxide) glycol, poly (1,2-propylene oxide) glycol, poly (1, 3-propylene oxide) glycol, poly (tetramethylene oxide) glycol, poly (hexamethylene oxide) glycol, poly (hexamethylene oxide) glycol, block or random copolymer of ethylene oxide and propylene oxide are preferably used. Among these, polyethylene glycol is particularly preferably used in terms of excellent antistatic properties.

  (C) Dicarboxylic acid which is a constituent of polyetheresteramide includes terephthalic acid, isophthalic acid, phthalic acid, naphthalene-2,6-dicarboxylic acid, naphthalene-2, 7-dicarboxylic acid, diphenyl-4,4′dicarboxylic acid. Acids, aromatic dicarboxylic acids such as diphenoxyethanedicarboxylic acid and 5-sulfoisophthalic acid, aliphatic dicarboxylic acids such as 1,4-cyclohexanedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid and dicyclohexyl-4,4′dicarboxylic acid And aliphatic carboxylic acids such as succinic acid, oxalic acid, adipic acid, sebacic acid and dodecanediic acid (decanedicarboxylic acid), and particularly terephthalic acid, isophthalic acid, 1,4-cyclohexanedicarboxylic acid, sebacic acid, Adipic acid and dodecazic acid are polymerizable, Preferably used from the viewpoint of regulating and physical properties.

  Poly (alkylene oxide) glycol and dicarboxylic acid react with each other at a molar ratio of 1: 1, but they are usually supplied at different feed ratios depending on the type of dicarboxylic acid used.

  The polyether ester unit in the polyether ester amide unit of the present invention is used in the range of 30% by weight to 70% by weight and has excellent mechanical properties, good yarn-making property, and sufficient antistatic property of the resulting fiber. I can be satisfied.

  The metal salt compound of sulfonic acid in the antistatic agent of the present invention is an alkyl benzene sulfonic acid such as dodecyl benzene sulfonic acid, tridecyl benzene sulfonic acid, tridecyl benzene sulfonic acid or nonyl benzene sulfonic acid, and an alkali metal such as sodium or potassium. Or a salt formed from an alkyl sulfonic acid and an alkali metal such as sodium or potassium. Among them, sodium dodecylbenzene sulfonate is particularly preferable.

  The blending amount of the sulfonic acid metal salt compound in the polyether ester amide is 2 parts by weight or more and 20 parts by weight or less, particularly preferably 3 parts by weight or more and 10 parts by weight or less based on 100 parts by weight of the polyether ester amide. It is as follows. The fiber obtained by using the antistatic agent whose blending amount satisfies this range is more excellent in antistatic property and good in yarn production. In the present invention, the polyether ester amide antistatic agent contained in the polyester may of course contain conventionally known antioxidants, coloring inhibitors and the like.

  When the antistatic agent satisfies the above-described configuration, it is presumed that the streaks of the antistatic component are easily dispersed uniformly and the antistatic property can be sufficiently exhibited.

  The method of adding the antistatic agent as described above may be at any stage from the polymerization process of the polyester to the melting in the spinning process, but in particular, the polyester chip and the antistatic agent chip are blended at a predetermined ratio before spinning. A method of melt mixing in a spinning machine is preferable from the viewpoint of both dispersibility and antistatic properties of the antistatic agent. As a method of chip blending, there is a means of mechanically blending with a blender or the like, but from the aspect of preventing demixing during movement of the blended chip, each chip is fed to the supply section of the melt extrusion apparatus by a metering feeder. It is more preferable to continuously weigh and supply and blend them.

As the spinning machine, a screw pressure melter type melt spinning machine or an extruder type melt spinning machine can be used. An extruder is preferable from the viewpoint of dispersibility of the antistatic agent and antistatic property. The extruder screw has a compression ratio compression ratio (hereinafter abbreviated as VCR) represented by the following formula = Hf (D−Hf) / Hm (D−Hm).
Hf: Screw supply groove depth (mm)
Hm: Screw melt groove depth (mm)
D: Screw diameter (mm)
Satisfies the characteristics of 2.0 or more and 3.0 or less, more preferably 2.0 or more and 2.5 or less.

  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 of this patent. .

  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 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.

  Next, the woven or knitted fabric made of the mixed fiber composite fiber of the present invention will be described. The mixed fiber conjugate fiber of the present invention has a shape effect by combining a filament yarn having a cross-sectional shape having no recesses and a filament yarn having a cross-sectional shape having 3 to 8 recesses, and an antistatic agent having hydrophilicity existing on the fiber surface As a result, the water absorption is excellent, the water absorption by the Bayrec method is 30 mm or more, and the diffusion rate by the dropping method is 10 seconds or less. The upper limit of water absorption by the Bayrec method is 200 mm or less, and the lower limit of the diffusion rate by the dropping method is 0 seconds.

  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.

  Further, the water absorption measurement by the dropping method was carried out by the following method, applying the dropping method in JIS L 1097: 2004 “Method for testing water absorption of 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).

  The woven or knitted fabric made of the mixed fiber composite fiber of the present invention exhibits a superior antistatic property by setting the frictional voltage to 3000 (V) or less.

  The friction band voltage of the woven or knitted fabric was measured by the following method using the method of measuring the friction band voltage in JIS L 1094: 1997 “Testing method for charging properties of woven fabric and knitted fabric”. First, 50 mm × 80 mm test pieces are prepared as samples, and 10 pieces are collected in the width direction. In addition, 10 pieces having a size of about 25 mm and a length of about 150 mm are collected from the friction cloth. An oscilloscope is connected to the frictional voltage measuring machine, and the distance between the electrode plate of the power receiving unit and the test piece mounting frame surface is set to about 15 mm. Next, the sample and the friction cloth are neutralized using a static eliminator, the height is adjusted by attaching the static friction cloth to a friction band voltage measuring machine, a load of 4.9 N is applied, and one place on the test piece mounting frame Attach so that the surface of the specimen becomes a friction surface. The rotating drum is rotated to rub the test piece, and the charged voltage (V) 60 seconds after the start of friction is measured. The test piece and the friction cloth were replaced, and this operation was carried out for each of the five test pieces in the transverse direction and expressed as an average value of the five pieces (2 significant digits).

  The woven fabric obtained by using the mixed fiber conjugate fiber of the present invention has an excellent drape property, which is different from a woven fabric obtained by using a composite structure false twisted yarn having a conventional core-sheath two-layer structure, and is dry. A textured fabric can be obtained.

  Next, a method for producing the mixed fiber composite fiber of the present invention will be described. The mixed fiber composite yarn of the present invention obtains 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 drawing or drawing false twisting However, the important thing is that the polyester fiber is unstretched or semi-stretched yarn which is mixed and bundled before being taken up by the take-up roller in the spinning process and mixed with filament yarns having different cross-sectional shapes. It is to be. Further, a spinning method such as a known direct spinning drawing and a method of continuously treating the drawing step and melt-spun yarn as described in Japanese Patent Publication Nos. 45-1932 and 60-75609 are disclosed. Of course, it is also possible to use a method in which the strip is once cooled to the glass transition temperature or less and then passed again through the heating zone to perform hot stretching. Specifically, for example, it can be obtained by the steps shown in FIGS.

  14-18 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.

  In FIG. 17, at least one type is a shape that does not have a recess, and the other shape is a shape that has 3 to 8 recesses, and is composed of two or more different types of spinning holes. A method in which the yarn spun from (A) is converged and lubricated, taken up by a heated take-up roller, then taken up by a heated draw roller without being wound once, and then subjected to draw heat treatment, and then mixed and concentrated by an interlace nozzle, and taken up. Indicates.

  In FIG. 18, at least one type is a shape having no recess, and the other shape is a shape having 3 to 8 recesses, and a single die composed of two or more different types of spinning holes. The method shows a method in which the yarn spun from (A) is once cooled, introduced into a cylindrical heating device, subjected to stretching and heat treatment, focused and lubricated, then mixed and focused by an interlace nozzle, and taken 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 melted polyester copolymer from a single spinneret composed of differently shaped spinning holes is preferable, and in the present invention, it is produced as shown in FIG.

  A single spinneret composed of two or more different types of spinning holes used in the present invention includes concentric constricted holes (FIG. 19), group, for example, as shown in FIGS. Examples include those arranged (FIG. 20) and those constricted in a lattice shape (FIGS. 21 and 22). 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. The characteristic values of the raw yarn and the fabric in the examples are determined by the method described in the best mode for carrying out the invention, and the dry feeling, sweat treatment property, antistatic effect, and fabric quality are evaluated by the following methods. did.
(1) Dry feeling Ten panelists scored by a sensory test by handling, and the evaluation was made in three stages as follows. A and B are target levels of the present invention.

◎: Average score of 10 panelists is 9 points or more ○: Average score of 10 panelists is 6 points or more and less than 9 points ×: Average score of 10 panelists is less than 6 points (2) In sweat treatment fabric From the water absorption height by the Bayrec method and the diffusion rate by the dropping method, the evaluation was made in three stages as follows. A and B are target levels of the present invention.

◎: Water absorption height of 50 mm or more and diffusion rate of 5 seconds or less ○: Water absorption height of 30 mm or more and less than 50 mm and diffusion rate of 10 seconds or less, or water absorption height of 30 mm or more and diffusion rate of 5 seconds or more and 10 seconds or less X: The water absorption height is less than 30 mm or the diffusion rate exceeds 10 seconds. (3) Antistatic effect From the friction band voltage in the fabric, the evaluation was made in three stages as follows. A and B are target levels of the present invention.

◎: Friction band voltage is 2000V or less. ○: Friction band voltage is over 2000V and 3000V or less. X: Friction band voltage is over 3000V. (4) Fabric quality Overall view of fabric dyeability (spots, streaks) and fluff The score was 10 out of 10 and evaluated in 3 stages as follows.

◎: 9 points or more ○: 6 points or more and less than 9 points ×: Less than 6 points Examples 1 to 7, Comparative Examples 1 to 6
A polyether ester amide-based antistatic agent chip having an antistatic polymer composition changed as shown in Table 1 was prepared. At the time of adjustment, 1,3,5-trimethyl-2,4,6-tri (3,5-di-terbutyl-4-hydroxyl) benzene as an antioxidant is added to 5. 5 parts by weight of polyetheresteramide. 5 parts by weight were added. The polyether ester amide-based antistatic chip was dried at 80 ° C. for 6 hours and then vacuum-dried at 160 ° C. for 6 hours with a polyethylene terephthalate (hereinafter abbreviated as PET) chip at the mixing ratio shown in Table 1 to obtain Melting with a melter type melt spinning machine, using a die having 24 round holes and 6 leaf type (hexaval type) holes 24 holes as shown in FIG. 19 and 3000 m / min by the process shown in FIG. The yarn was spun at a speed of 140 dtex, 48 filaments, and a semi-drawn yarn having an entanglement number of 20 / m. This semi-drawn yarn was drawn at a drawing temperature of 90 ° C., a heat setting temperature of 130 ° C., a draw ratio of 1.67 times, a drawing speed of 500 m / min using a normal hot roll-hot roll drawing machine, A drawn yarn was obtained. As a result of observing the cross section of the obtained mixed fiber composite yarn with an optical microscope by an embedding method, as shown in FIG. 10, it has a structure in which a round cross section and a hexaloval cross section are randomly dispersed in the inner layer and the outer layer. It was a multifilament yarn. Weaving using this stretched yarn, 120 ° C liquid flow relaxation treatment, 190 ° C intermediate set, 130 ° C liquid dyeing treatment, 160 ° C finishing set, finishing density of 84 vertical / 2.54cm, A woven fabric having a width of 73 pieces / 2.54 cm was obtained. Table 1 shows the evaluation results.

Example 8
The polyether ester amide antistatic agent chip having the same composition as in Example 1 was dried at 80 ° C. for 6 hours and then blended with a PET chip vacuum-dried at 160 ° C. for 6 hours, and then used in a screw pressure melter type melt spinning machine. Melted and spun at a speed of 3000 m / min by a process as shown in FIG. 14 using a die having 24 round holes and 4 leaf type 24 holes as shown in FIG. 19, 140 dtex 48 filaments, entanglement A semi-drawn yarn of several 20 co / m was obtained. This semi-drawn yarn was drawn at a drawing temperature of 90 ° C., a heat setting temperature of 130 ° C., a draw ratio of 1.67 times, a drawing speed of 500 m / min using a normal hot roll-hot roll drawing machine, A drawn yarn was obtained. As a result of observing the cross section of the obtained composite fiber composite yarn with an optical microscope by an embedding method, it was a multifilament yarn having a structure in which a round cross section and a four-leaf cross section were randomly dispersed in the inner layer and the outer layer. Weaving using this stretched yarn, 120 ° C liquid flow relaxation treatment, 190 ° C intermediate set, 130 ° C liquid dyeing treatment, 160 ° C finishing set, finishing density of 84 vertical / 2.54cm, A woven fabric having a width of 73 pieces / 2.54 cm was obtained. Table 2 shows the evaluation results.

Comparative Example 7
Polyester filaments obtained by drying a polyether ester amide antistatic agent chip having the same composition as in Example 1 at 80 ° C. for 6 hours, blending with a PET chip vacuum-dried at 160 ° C. for 6 hours, spinning and drawing An octaloval yarn (84 dtex 36 filament) having 8 recesses and a round cross-section yarn (84 dtex 36 filament) having no recesses with a polyester filament obtained by spinning and stretching a similar chip separately. A single mixed fiber composite yarn was obtained by drawing and mixing. 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 the round cross section and the octaloval were separated into two layers. Weaving using this mixed fiber composite yarn, 120 ° C liquid flow relaxation treatment, 190 ° C intermediate set, 130 ° C liquid flow dyeing treatment, 160 ° C finishing set, and finishing density of 69 pieces / 2. A woven fabric having a length of 54 cm and a width of 60 pieces / 2.54 cm was obtained. Table 2 shows the evaluation results.

Comparative Example 8
The polyether ester amide antistatic agent chip having the same composition as in Example 1 was dried at 80 ° C. for 6 hours and then blended with a PET chip vacuum-dried at 160 ° C. for 6 hours, and then used in a screw pressure melter type melt spinning machine. Using a die that was melted and provided with 48 round holes, spinning was performed at a speed of 3000 m / min by a process as shown in FIG. 14 to obtain a semi-drawn yarn having 140 decitex 48 filaments and an entanglement number of 20 co / m. This semi-drawn yarn was drawn at a drawing temperature of 90 ° C., a heat setting temperature of 130 ° C., a draw ratio of 1.67 times, a drawing speed of 500 m / min using a normal hot roll-hot roll drawing machine, A drawn yarn was obtained. Weaving using this stretched yarn, 120 ° C liquid flow relaxation treatment, 190 ° C intermediate set, 130 ° C liquid dyeing treatment, 160 ° C finishing set, finishing density of 84 vertical / 2.54cm, A woven fabric having a width of 73 pieces / 2.54 cm was obtained. Table 2 shows the evaluation results.

Comparative Example 9
The polyether ester amide antistatic agent chip having the same composition as in Example 1 was dried at 80 ° C. for 6 hours and then blended with a PET chip vacuum-dried at 160 ° C. for 6 hours, and then used in a screw pressure melter type melt spinning machine. Using a die that has been melted and provided with 48 holes of 6-leaf type (hexa-lobe type) holes, spinning is performed at a speed of 3000 m / min by a process as shown in FIG. 14, 140 decitex 48 filaments, entanglement number 20 co / m A semi-drawn yarn was obtained. This semi-drawn yarn was drawn at a drawing temperature of 90 ° C., a heat setting temperature of 130 ° C., a draw ratio of 1.67 times, a drawing speed of 500 m / min using a normal hot roll-hot roll drawing machine, A drawn yarn was obtained. Weaving using this stretched yarn, 120 ° C liquid flow relaxation treatment, 190 ° C intermediate set, 130 ° C liquid dyeing treatment, 160 ° C finishing set, finishing density of 84 vertical / 2.54cm, A woven fabric having a width of 73 pieces / 2.54 cm was obtained. Table 2 shows the evaluation results.

Example 9
A polyether ester amide antistatic agent chip having the same composition as in Example 1 was dried at 80 ° C. for 6 hours and then blended with a PET chip vacuum-dried at 160 ° C. for 6 hours to obtain a VCR = 2.3, Q / N. = 1.4 Using a die having a characteristic of 1.4 and melted with an extruder type melt spinning machine and having 12 holes of 12 round holes and 12 holes of 6 leaf type (hexaval type), the process shown in FIG. The yarn spun from the die is once cooled, introduced into a cylindrical heating device (heating area temperature = 200 ° C.) and stretched, and then wound at a speed of 4900 m / min via a goded roller, A drawn yarn having 56 dtex 24 filaments and an intertwined number of 13 co / m was obtained. As a result of observing the cross section of the obtained mixed fiber composite yarn with an optical microscope using an embedding method, as shown in FIG. 11, a round cross section shape and a hexaloval type cross section were randomly dispersed in the inner layer and the outer layer. Was a multifilament yarn. The drawn yarn was knitted with a circular knitting machine, and an intermediate set, a liquid dyeing process, and a finishing set were performed to obtain a knitted fabric. Table 2 shows the evaluation results.

Example 10
The polyether ester amide antistatic agent chip having the same composition as in Example 1 was dried at 80 ° C. for 6 hours and then blended with a PET chip vacuum-dried at 160 ° C. for 6 hours, and then used in a screw pressure melter type melt spinning machine. Using a die having melt holes, 24 round holes, and 6 leaf type (hexaval type) holes 24 holes as shown in FIG. 19, spinning is performed at a speed of 3000 m / min according to the process shown in FIG. A semi-drawn yarn having a decitex 48 filament and an entanglement number of 20 / m was obtained. This semi-drawn yarn was subjected to drawing false twisting with a friction type drawing false twisting machine DF-7 manufactured by Toray Engineering Co., Ltd. at a draw ratio of 1.67 times and a twisted twist number of 3000 T / M. A twisted crimped yarn (mixed fiber composite yarn) was obtained. As a result of observing the cross section of the obtained mixed fiber composite yarn with an optical microscope using an embedding method, the cross-sectional shape filament yarn having no concave portion whose round cross-sectional shape was deformed into a rice ball shape by drawing false twisting, and a six-leaf type It was a multifilament yarn having a structure in which a cross-sectional filament yarn having a recess whose cross-sectional shape was deformed by drawing false twisting was randomly dispersed in an inner layer and an outer layer without forming a two-layer structure. The false twisted yarn was used for knitting with a circular knitting machine, and an intermediate set, a liquid dyeing process, and a finishing set were performed to obtain a knitted fabric. Table 2 shows the evaluation results.

  Examples 1 to 10 were excellent in both water absorption and sweat treatment properties, and had a dry texture. Moreover, the antistatic effect was excellent and the fabric quality was also good.

  On the other hand, in Comparative Example 1, the content of the antistatic agent was small, and the distance between the lines made of the antistatic agent on the fiber surface was narrow, so that the sweat treatment property and the antistatic effect were poor. In Comparative Example 2, the content of the antistatic agent was large and the width of the streaks made of the antistatic agent on the fiber surface was large, resulting in poor fabric quality. Comparative Example 3 and Comparative Example 5 had high yarn specific resistance and poor antistatic effect. In Comparative Example 4, the width of the streaks made of the antistatic agent on the fiber surface was small, and the sweat processability was poor. In Comparative Example 6, the width of the stripe made of the antistatic agent on the fiber surface was large and the fabric quality was poor. In Comparative Example 7, a cross-sectional yarn having a concave portion and a cross-sectional yarn having no concave portion are separately spun and drawn to obtain a mixed fiber composite yarn by post-mixing, and the cross section having the concave portion and the cross section having no concave portion are 2 It is divided into layers, and the gap between the single yarns cannot be taken sufficiently by meshing the cross section with the recess, so the water absorption height by the birec method is low, the water absorption diffusion rate by the dropping method is also low, dry feeling, sweat treatment It became bad. Comparative Example 8 was composed of a filament composed of only a cross section having no recess, and the dry feeling and sweat treatment were poor. Comparative Example 9 was composed of a filament composed of only a cross section having a recess, and the dry feeling and sweat treatment were poor.

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 mixed fiber composite yarn of the present invention Side schematic diagram showing an example of the mixed fiber composite 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 composite yarn of this invention Process schematic which shows another example of the method of obtaining the mixed fiber composite yarn of this invention Process schematic which shows another example of the method of obtaining the mixed fiber composite yarn of this invention Process schematic which shows another example of the method of obtaining the mixed fiber composite yarn of this invention Process schematic which shows another example of the method of obtaining the mixed fiber composite yarn 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 7: cylindrical heating device A: one base B composed of two or more differently shaped spinning holes B: concave portion One die C constituted by spin holes having a shape not having C: One die constituted by spinning holes having a shape having 3 to 8 recesses

Claims (4)

Two or more different types of polyester filament yarns having different cross-sectional shapes containing 0.2 to 5% by weight of a highly hydrophilic polymer as an antistatic agent, one of which is a filament yarn having a cross-sectional shape having no recess, and the other is 3 to It is a filament yarn having a cross-sectional shape having eight concave portions, each of the filament yarns having a cross-sectional shape mixed in a random state, and satisfies the following (1) and (2) simultaneously Mixed fiber composite fiber characterized by
(1) The specific resistance of the mixed fiber is 10 × 10 ^{8 to} 1000 × 10 ⁸ Ω · cm.
(2) The fiber surface has a number of streaks made of an antistatic agent oriented in the fiber axis direction, the width of the streaks is 0.1 to 3 μm, and the distance between adjacent streaks is 2 μm or less.   The antistatic agent is a polyether ester amide composed of (A) an aminocarboxylic acid, or a lactam, or a salt of a diamine and a dicarboxylic acid, (B) a poly (alkylene oxide) glycol, and (C) a dicarboxylic acid, A polyether ester amide antistatic agent comprising 100 parts by weight of the polyether ester amide having a polyether ester unit of 30 to 70% by weight and 2 to 20 parts by weight of a metal compound of a sulfonic acid. The mixed fiber composite fiber according to 1.   0.2 to 5% by weight of a highly hydrophilic polymer as an antistatic agent, and two or more types of polyester filament yarns having different cross-sectional shapes, one of which is a filament yarn having a cross-sectional shape having no recesses, The other is a filament yarn having a cross-sectional shape having 3 to 8 recesses, each of the cross-sectional filament yarns is made of a mixed fiber composite fiber mixed in a random state, and has a water absorption characteristic of 30 mm or more by the birec method A woven or knitted fabric having a diffusion rate by a dropping method of 10 seconds or less.   4. The knitted or knitted fabric according to claim 3, wherein the frictional voltage is 3000 (V) or less.

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