JP2004270126A - Combined filament yarn, method for producing the same and woven or knitted fabric - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide combined filament yarn from which such a stretch fabric is obtained that a soft feeling like peach skin, durability, chlorine resistance, and light resistance of the fabric are so excellent as not to be given by conventional technology, when the fabric is subjected to higher-order processing and used for clothing, etc., thickness of the fabric is small, and the fabric has a flat feel, and to provide a method for producing the same. <P>SOLUTION: This combined filament yarn is formed by combining polyester-based conjugated fiber yarn with other filament yarn, wherein the polyester-based yarn comprises side-by-side type yarn or eccentric sheath-core type yarn in which at least one of constituents is formed out of polytrimethylene terephthalate, and the combined filament yarn has a number of loops projecting from surfaces of the yarn by 0.35 mm or more of ≥250 counts/m and a number of loops projecting from the surfaces of the yarn by 2.0 mm or more of ≤5 counts/m. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a mixed fiber, a method for producing the same, and a woven or knitted fabric.

  2. Description of the Related Art Conventionally, a mixed fiber obtained by subjecting a yarn to a fluid turbulent flow treatment (see Patent Document 1) has a large number of loops on the surface of the yarn, and has a soft surface feel and a voluminous feel. It is used for many purposes. However, the conventional mixed fiber has almost no stretchability and is not used at all in applications requiring stretchability such as sports clothing.

Further, as a stretch material, a polyurethane-based elastic fiber yarn is pre-drawn, then mixed with another fiber yarn such as a polyamide fiber or a polyethylene terephthalate fiber, and air-processed mixed fiber yarn (see Patent Document 2) is used as a stocking or inner. Or it has been used for general clothing such as outerwear. However, when a woven or knitted fabric is formed with a mixed yarn using a polyurethane elastic fiber as the core yarn, a woven or knitted fabric having excellent fit and stretchability can be obtained, but the texture becomes hard and drape is formed. The woven and knitted fabric itself becomes thicker. In general, polyurethane-based elastic fibers have a drawback that they are easily embrittled by chlorine and are easily yellowed by light or gas because of their chemical structure, so their durability and resistance to chlorine, light and gas have been improved. Although a technique for causing these problems has been disclosed, the results are still insufficient, and there is an urgent need to develop a mixed fiber yarn with these disadvantages improved.
JP-A-2002-249954 JP 2001-123360 A

  Therefore, an object of the present invention is to provide a peach skin-like soft texture, durability, chlorine resistance, and light resistance that cannot be obtained by the conventional technology when high-order processing and use in clothes, etc. It is an object of the present invention to provide a mixed fiber yarn capable of obtaining a thin and flat stretch fabric and a method for producing the same.

  The mixed fiber of the present invention employs the following means in order to solve the above problems.

  That is, the mixed fiber of the present invention is obtained by mixing a polyester-based composite fiber yarn of a side-by-side type or an eccentric sheath-core type in which at least one of the constituent components is made of polytrimethylene terephthalate and another filament yarn. The number of loops protruding from the yarn surface by 0.35 mm or more is 250 / m or more, and the number of loops protruding 2.0 mm or more from the yarn surface is 5 / m or less. It is a mixed fiber characterized by the following.

  Further, the method for producing a mixed fiber of the present invention is characterized in that a polyester-based composite fiber yarn of a side-by-side type or an eccentric sheath-core type in which at least one of the constituent components is made of polytrimethylene terephthalate is from 6% to 20%. A method of producing a mixed fiber yarn, comprising supplying the other filament yarn at an overfeed ratio equal to or higher than the polyester fiber yarn to join the two yarns, and performing a fluid turbulent flow treatment. is there.

  In the present invention, the above-described unique woven or knitted fabric can be knitted or woven using the above-described mixed yarn.

  According to the present invention, when processed in a higher order and used for clothes, etc., the dyeing properties, dyeing fastness, soft texture, durability, chlorine resistance and light resistance which were not obtained by the conventional technology are excellent, and the fabric is It is possible to obtain a mixed fiber that has a thin and flat feeling, has a crisp feel, and is capable of obtaining a peach skin tone stretch fabric.

  Hereinafter, the mixed fiber of the present invention will be specifically described.

  First, the mixed fiber of the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view showing an example of the mixed fiber of the present invention. In the mixed fiber yarn (c) of the present invention, a polyester composite fiber yarn (a) and another filament yarn (b) such as polyethylene terephthalate fiber are mixed and the other filament yarn (b) protrudes as a loop. It has a shape.

  FIG. 2 is a schematic side view of the mixed fiber (F) of the present invention which has been subjected to boiling water treatment at 98 ° C. for 30 minutes under no load. By performing the boiling water treatment, the polyester-based composite fiber yarn (d) shrinks in a state where the other filament yarn (e) protrudes as a loop, and latent crimps are developed. ) Is bulky and stretchy.

  In the mixed fiber of the present invention, it is important that the number of loops projecting 0.35 mm or more from the yarn surface is 250 or more / m. When the number of loops protruding from the yarn surface by at least 0.35 mm is at least 250 / m, a fabric having a soft peach skin tone can be obtained. A preferable upper limit of the number of loops projecting 0.35 mm or more from the yarn surface is 450 / m. Further, in the mixed fiber of the present invention, the number of loops projecting 2.0 mm or more from the yarn surface must be 5 or less. If the number of loops protruding 2.0 mm or more from the yarn surface is more than 5 / m, the loops may be entangled to cause poor unwinding, or when used as a warp, the loops of adjacent processed yarns may be entangled to cause poor weaving. This causes a so-called fastener phenomenon, which significantly deteriorates the processability of the yarn.

  As the mixed fiber of the present invention, a polyester-based composite fiber yarn of a side-by-side type or an eccentric sheath-core type in which at least one of the constituent components is made of polytrimethylene terephthalate is used.

  When the polymers having different intrinsic viscosities are bonded to each other in the polyester-based composite fiber yarn, stress is concentrated on the high-viscosity side during spinning and drawing, so that the internal strain differs between the two components. Therefore, the high-viscosity side largely shrinks due to the difference in elastic recovery rate after stretching and the difference in heat shrinkage in the heat treatment step of the fabric such as a woven or knitted fabric, causing distortion within a single fiber to take the form of a three-dimensional coil crimp. The diameter of the three-dimensional coil and the number of coils per single fiber length may be determined by the difference in shrinkage (including the difference in elastic recovery rate) between the high shrinkage component and the low shrinkage component. And the number of coils per unit fiber length increases.

  The coil crimp required as a stretch material has a small coil diameter, a large number of coils per unit fiber length (excellent elongation characteristics, good appearance), and good coil set resistance (according to the number of times of expansion and contraction) The coil has a small amount of sag and is excellent in stretch retention). Furthermore, since the expansion and contraction characteristics of the coil are dominated by the expansion and contraction characteristics of the high contraction component with the low contraction component as a fulcrum, the weight used for the high contraction component is high. High elongation and recovery are required for coalescence.

  Therefore, in the present invention, a polyester composite fiber yarn containing polytrimethylene terephthalate as a main component is used as a high shrinkage component (high viscosity component). Fibers made of polytrimethylene terephthalate have mechanical properties and chemical properties equivalent to those of typical polyester fibers, such as polyethylene terephthalate fibers and polybutylene terephthalate fibers, and are extremely excellent in elongation recovery. This is because in the polytrimethylene terephthalate crystal structure, the methylene chain of the alkylene glycol moiety has a Gauche-Gauche structure (the molecular chain is bent at 90 degrees), and furthermore, the benzene rings are constrained by interaction (stacking, paralleling). It is thought that the molecular chain is easily extended and recovered by the rotation of the methylene group because of the low point density and high flexibility.

  The polytrimethylene terephthalate, which is at least one component of the polyester composite fiber yarn used in the composite yarn of the present invention, is preferably composed of a polymer component having a trimethylene terephthalate unit as a main repeating unit.

  As the polytrimethylene terephthalate in the present invention, a polyester obtained by using terephthalic acid as a main acid component and 1,3 propanediol as a main glycol component is preferable. However, it is preferable that another copolymer component capable of forming an ester bond is contained at a ratio of 20 mol% or less, and it is more preferable that the copolymer component be contained at a ratio of 10 mol% or less. As the copolymerizable compound, for example, dicarboxylic acids such as isophthalic acid, succinic acid, cyclohexanedicarboxylic acid, adipic acid, dimeric acid, sebacic acid, 5-sodium sulfoisophthalic acid, ethylene glycol, diethylene glycol, butanediol, neopentyl Diols such as glycol, cyclohexanedimethanol, polyethylene glycol and polypropylene glycol are preferably used.

  If necessary, titanium dioxide as a matting agent, silica or alumina fine particles as a lubricant, hindered phenol derivatives, coloring pigments and the like as antioxidants may be added.

  The polyester composite fiber yarn in the present invention is not particularly limited as long as the other component (low shrinkage component) of the polyester composite fiber yarn has a lower shrinkage than polytrimethylene terephthalate used as a high shrinkage component. It is preferable to be composed of polyester. Specifically, polyethylene terephthalate, polybutylene terephthalate, and the like, and polytrimethylene terephthalate having different properties from polytrimethylene terephthalate used as a high shrinkage component, for example, having a different viscosity, can also be used. Above all, compared to polytrimethylene terephthalate, which is a high shrinkage component, the low shrinkage component (low viscosity component) has good interfacial adhesion, and the mechanical properties, chemical properties and raw material prices are taken into account. Terephthalate is most preferred.

  The polyethylene terephthalate used as a component of the polyester-based composite fiber yarn used in the blended yarn of the present invention is preferably one comprising a polymer component having an ethylene terephthalate unit as a main repeating unit.

  That is, as the polyethylene terephthalate in the present invention, a polyester obtained by using terephthalic acid as a main acid component and ethylene glycol as a main glycol component is preferable. However, it is preferable that another copolymer component capable of forming an ester bond is contained at a ratio of 20 mol% or less, and it is more preferable that the copolymer component be contained at a ratio of 10 mol% or less. Examples of the copolymerizable compound include, for example, sulfonic acid, sodium sulfonic acid, sulfuric acid, sulfate ester, diethyl sulfate, ethyl sulfate, aliphatic sulfonic acid, ethanesulfonic acid, chlorobenzenesulfonic acid, alicyclic sulfonic acid, isophthalic acid, Dicarboxylic acids such as sebacic acid, azelaic acid, dimer acid, adipic acid, oxalic acid, decanedicarboxylic acid, hydroxycarboxylic acids such as p-hydroxybenzoic acid and ε-caprolactone, triethylene glycol, polyethylene glycol, propane Diols such as diol, butanediol, pentanediol, hydroquinone and bisphenol A are preferably used.

  If necessary, titanium dioxide as a matting agent, silica or alumina fine particles as a lubricant, hindered phenol derivatives, coloring pigments and the like as antioxidants may be added.

  In the present invention, the intrinsic viscosity of polytrimethylene terephthalate is preferably 1.0 or more, and more preferably 1.2 or more, from the viewpoint of expressing coiled crimp and obtaining desired elasticity when a knitted fabric is formed. , 1.6 or less. When polyethylene terephthalate is used as the other component, the intrinsic viscosity of polyethylene terephthalate is preferably 0.45 or more and 0.85 or less, and the intrinsic viscosity difference between the two is 0.4 or more and 1.1 or less. Preferably, there is.

  The cross-sectional shape of the single fiber constituting the polyester-based composite fiber yarn used in the present invention is a side-by-side type or an eccentric sheath-core type. If the cross-sectional shape is not a side-by-side type or an eccentric sheath-core type, when heat is applied to the polyester-based composite fiber yarn, coiled crimps do not appear, and the yarn can be given suitable elasticity. Can not.

  The weight ratio of the constituent components in the polyester-based composite fiber yarn used in the blended yarn of the present invention is high shrinkage component (polytrimethylene terephthalate) / low shrinkage in view of the spinning properties and the dimensional homogeneity of the coil in the fiber length direction. The component (other polymer, particularly polyester) is preferably in the range of 30/70 or more and 70/30 or less.

  The fineness of the polyester-based composite fiber yarn is preferably in the range of 20 dtex to 600 dtex depending on the purpose of use. The fineness of the single fiber constituting the polyester-based composite fiber yarn is preferably in the range of 0.4 dtex to 18 dtex depending on the application.

  The mixed fiber of the present invention is a mixed fiber obtained by using other filament yarns in addition to the polyester-based composite fiber yarn and mixing these.

  As the other filament yarn, a filament yarn made of polyethylene terephthalate fiber, polytrimethylene terephthalate fiber or polyamide fiber is preferably used. Specifically, the form of the filament yarn may be any of a raw yarn, a temporary twisted yarn, a yarn-dyed yarn, and the like, or may be a composite yarn of these yarns.

  The type, fineness, and mode of the other filament yarn can be appropriately selected according to the purpose of use. The other filament yarn may be a single yarn, but is preferably composed of a plurality of yarns. In addition, if another filament yarn having a different dyeing property is used, it is possible to obtain a processed yarn having further design properties.

  The fineness of the other filament yarn is preferably in the range of 20 dtex to 1000 dtex depending on the purpose of use. Further, the fineness of the single fiber constituting the other filament yarn is preferably in the range of 0.4 dtex to 16 dtex depending on the application.

  The mixed yarn of the present invention is a mixed yarn obtained by mixing the above-mentioned polyester-based composite fiber yarn and another filament yarn, and the elongation recovery at 10% elongation is 90% or more. preferable. If the elongation recovery rate at 10% elongation is less than 90%, it is not possible to obtain appropriate stretchability when forming a woven or knitted fabric. A more preferable elongation recovery rate is 95% or more.

  Next, a method for producing the mixed fiber of the present invention will be described.

  FIG. 3 is a schematic diagram showing an example of the method for producing a mixed fiber of the present invention. In the method for producing a mixed fiber according to the present invention, a polyester-based composite fiber yarn of a side-by-side type or an eccentric sheath-core type in which at least one of the constituent components is made of polytrimethylene terephthalate has an excess of 6% or more and 20% or less. The yarn is fed at a feed rate, and the other filament yarns are fed at an overfeed rate equal to or higher than the polyester-based fiber yarn so that the two yarns join to perform fluid turbulence treatment.

  Conventionally, in the polyester fiber yarn, each single fiber constituting the polyester fiber yarn has a coil-shaped crimp, and it has been considered that it is extremely difficult to perform the entanglement processing of the fiber yarn having such a crimp. . However, the present inventors have conducted intensive studies and found that by feeding the polyester fiber yarn to the entanglement nozzle while applying an overfeed rate of 6% or more and 20% or less, the coiled crimp is further made more apparent. It has been found that entanglement with other filament yarns is remarkably improved.

  If the overfeed rate of the polyester-based composite fiber yarn is less than 6%, the coil-shaped crimp is not sufficiently developed immediately before the fluid turbulent flow treatment, so that the yarn is not sufficiently entangled and the yarn surface is thickened. . On the other hand, when the overfeed ratio of the polyester-based composite fiber yarn is larger than 20%, the yarn tension during running is reduced due to the limit of the entanglement performance of the nozzle, and yarn breakage occurs.

  On the other hand, the other filament yarn to be composited needs to have an overfeed rate equal to or higher than that of the polyester fiber yarn so as to be a sheath yarn of the composite yarn of the present invention.

  As shown in FIG. 3, the supply of the polyester composite fiber yarn and the other filament yarn is performed by separately supplying the polyester composite fiber yarn 1 and the other filament yarn 2 to the entanglement nozzle 6 by the feed roller 3 and the feed roller 5, respectively. Can be joined. Further, in the present invention, from the viewpoint of improving the entanglement performance of the nozzle, before the polyester-based composite fiber yarn 1 is inserted into the fluid turbulent flow nozzle 6, the polyester-based composite fiber yarn 1 is preferably applied to the polyester-based composite fiber yarn 1 by the water application guide 4. It is preferred to apply ~ 100 cc / min of water.

  The polyester-based composite fiber yarn 1 and the other filament yarn 2 are subjected to a commercially available fluid turbulence treatment in a fluid turbulence nozzle 6 and mixed. In the present invention, it is preferable to use a Taslan nozzle as the fluid turbulent nozzle 6. Further, the pressure for treating the fluid turbulence is preferably from 0.3 MPa to 0.8 MPa.

  In the present invention, as described above, the polyester-based composite fiber yarn is supplied at an overfeed rate of 6% or more and 20% or less, and the other filament yarns are supplied at an overfeed rate of not less than the polyester-based fiber yarn to join both yarns. At least the fluid turbulence treatment is performed. In the present invention, the overfeed rate means an oversupply rate of the yarn speed in the feed roller 3 or the feed roller 5 to the delivery roller 7.

  The surface speed on the delivery roller, which is the processing speed of the mixed fiber of the present invention, is preferably in the range of 100 m / min to 650 m / min in view of cost or the mixed fiber form of the mixed fiber, and more preferably 300 m / min to 500 m / min. Minutes are more preferred.

  In the present invention, it is preferable to perform heat setting on the yarn after performing the fluid turbulent flow treatment. The heat setting temperature is preferably in the range of 130 ° C. or more and 210 ° C. or less at the temperature of the tube heater 8 from the viewpoint of suppressing a decrease in yarn strength due to breakage of a single fiber due to thermal deterioration of the fiber due to heat setting. The heat-set fancy yarn passes through a feed roller 9 and is wound around a cheese 11 by a take-up roller 10. The mixed fiber of the present invention can be knitted or woven to form a woven or knitted fabric.

  The woven or knitted fabric using the blended yarn of the present invention is a stretch fabric having a soft texture of peach skin tone, excellent durability, chlorine resistance and light resistance, and a thin and flat fabric, particularly sports clothing and the like. It can be suitably used for applications requiring stretchability.

  Hereinafter, the mixed fiber of the present invention and the method for producing the same will be described in detail with reference to examples. However, the present invention is not limited by these examples. The properties such as intrinsic viscosity (η) in the examples were obtained by the following methods.

[Intrinsic viscosity (η)]
0.10 g of a sample was dissolved in 10 ml of orthochlorophenol and measured at 25 ° C. using an Ostwald viscometer.

[Number of loops (pieces / m)]
The number of loop fluffs projecting 0.35 mm or more or 2.0 mm or more from the yarn surface of the mixed fiber was measured using a photoelectric fluff measuring machine (TORAY FRAY COUNTER) at a yarn speed of 60 m / min and a running yarn tension of 0. It was measured under the condition of 1 g / d.

[Elongation recovery rate at 10% elongation (%)]
Using a constant-speed elongation type tensile tester equipped with a self-recording device, with an initial load of 0.08826 cN applied per decitex, attached at 20 cm grip intervals, with a tensile speed of 20 cm / min, 10% elongation And immediately unloaded at the same speed. Immediately after the weight was completely removed, the film was stretched to the initial load, and the recovery elongation at this time was defined as the elongation recovery rate.

[Example 1]
Polytrimethylene terephthalate having an intrinsic viscosity of 1.31 and polyethylene terephthalate having an intrinsic viscosity of 0.52 are separately melted, and the weight ratio of polyethylene terephthalate / polytrimethylene terephthalate is obtained from a 24-hole composite spinneret at a spinning temperature of 260 ° C. Was discharged at a spinning speed of 1400 m / min to obtain an undrawn yarn of 165 dtex24 filament. Further, using a hot roll-hot plate stretching machine, the hot roll temperature is 70 ° C., the hot plate temperature is 145 ° C., and the stretching ratio is 3.0, and a side-by-side type polyester-based composite fiber yarn (drawn yarn) having 56 dtex24 filaments is obtained. Obtained. The obtained polyester-based composite fiber yarn was used as a core yarn, and a yarn obtained by drawing and drawing three 56 dtex 48-filament polyethylene terephthalate drawn yarns as a sheath yarn was used. Using the fluid entanglement processing step shown in FIG. Air (fluid) processing was performed under the conditions, and 362 loops / m protruded from the yarn surface by 0.35 mm or more, and 0.6 loops / m protruded from the yarn surface by 2.0 mm or more, at a time of 10% elongation. A mixed fiber having an elongation recovery rate of 97.5% was obtained.
Yarn speed: 200 m / min (yarn speed at delivery roller 7)
Nozzle: Hema jet TE-312K (Hebrew Line)
Overfeed rate: core thread + 10%
Overfeed rate: sheath yarn + 20%
Fluid turbulent pressure: 0.6 MPa
Water application: Available (60cc / min)
Heat setting temperature: 170 ° C
Using the resulting mixed yarn, knitting with a 28 gauge, 1-port knitting machine, dyeing with a disperse dye for polyester, and finishing, as a result, soft texture of peach skin tone, durability when worn, chlorine resistance A knitted fabric with excellent over-strength, thin fabric, flat feeling and good stretchability was obtained.

[Example 2]
Using the same side-by-side type polyester composite fiber yarn of 56 dtex 24 filament as the core yarn used in Example 1 as the core yarn, and using a polytrimethylene terephthalate drawn yarn of 56 dtex 48 filament as the sheath yarn, a fluid was obtained under the following conditions in the same manner as in Example 1. Entangling treatment is performed, and 398 loops / m protrude from the yarn surface by 0.35 mm or more, 0.6 loops / m protrude from the yarn surface by 2.0 mm or more, and the elongation recovery rate at 10% elongation is 98. A 3% mixed fiber was obtained.
Yarn speed: 200 m / min (yarn speed at delivery roller 7)
Nozzle: Hema jet TE-312K
Overfeed rate: core thread + 10%
Overfeed rate: sheath yarn + 20%
Fluid turbulent pressure: 0.6 MPa
Water application: Available (60cc / min)
Heat setting temperature: 170 ° C
Using the resulting mixed yarn, knitting with a 28 gauge, 1-port knitting machine, dyeing with a disperse dye for polyester, and finishing, as a result, soft texture of peach skin tone, durability when worn, chlorine resistance A knitted fabric having excellent stretchability and light resistance, a thin fabric, a flat feeling, and good stretchability was obtained.

[Example 3]
Using the same side-by-side type polyester-based composite fiber yarn of 56 dtex 24 filaments as the core yarn used in Example 1 as the core yarn and two drawn polyamide yarns of 70 dtex 52 filaments as the sheath yarn, the same as in Example 1, 404 loops / m protruding 0.35 mm or more from the yarn surface, 0.3 loops / m protruding 2.0 mm or more from the yarn surface, elongation at 10% elongation A mixed fiber having a recovery rate of 97.3% was obtained.
Yarn speed: 200 m / min (yarn speed at delivery roller 7)
Nozzle: Hema jet TE-312K
Overfeed rate: core thread + 10%
Overfeed rate: sheath yarn + 20%
Fluid turbulent pressure: 0.6 MPa
Water application: Available (60cc / min)
Heat setting temperature: 170 ° C
Using the obtained mixed yarn, knitting with a 28-gauge, 1-port knitting machine, dyeing a single bath with a disperse dye for polyester and an acid dye, and finishing the fabric, the peach skin-like soft texture, A knitted fabric having excellent durability, chlorine resistance, and light resistance, a thin fabric, a flat feeling, and good stretchability was obtained.

[Comparative Example 1]
Using the same side by side type polyester composite fiber yarn of 56 dtex 24 filaments as the core yarn used in Example 1 as a core yarn, and using a drawn yarn of two 70 dtex 52 filament polyamide drawn yarns as a sheath yarn, fluid entanglement treatment under the following conditions After processing, 184 loops / m protruding from the yarn surface by 0.35 mm or more, 5.7 loops / m protruding from the yarn surface by 2.0 mm or more, and the elongation recovery rate at 10% elongation is 97.0. % Of the mixed fiber was obtained.
Yarn speed: 100 m / min (yarn speed at delivery roller 7)
Nozzle: Hema jet TE-312K
Overfeed rate: core thread + 3%
Overfeed rate: sheath yarn + 20%
Air pressure: 0.5MPa
Water application: Available (20cc / min)
Heat setting temperature: 170 ° C
The obtained mixed fiber was knitted with a 28-gauge, one-neck knitting machine in the same manner as in Example 1 and dyed in a single bath with a disperse dye for polyester and an acid dye, followed by finishing. Since there are many loops protruding by 0 mm or more, a hard knitted fabric having a peach skin-like soft texture was obtained.

[Comparative Example 2]
A fluid entanglement treatment was performed under the same conditions as in Example 1 under the same conditions as in Example 1, except that a drawn yarn of polyethylene terephthalate of 56 dtex 24 filaments was used as a core yarn, and a drawn yarn of three drawn polyethylene terephthalate yarns of 48 dtex 48 filaments was used as a sheath yarn. , Loops projecting 0.35 mm or more from the yarn surface are 411 loops / m, loops projecting 2.0 mm or more from the yarn surface are 0.3 loops / m, and the elongation recovery rate at 10% elongation is 60.7%. Was obtained.
Yarn speed: 200 m / min (yarn speed at delivery roller 7)
Nozzle: Hema jet TE-312K
Overfeed rate: core thread + 10%
Overfeed rate: sheath yarn + 20%
Fluid turbulent pressure: 0.6 MPa
Water application: Available (60cc / min)
Heat setting temperature: 170 ° C
Using the obtained mixed fiber, as in Example 1, knitted with a 28-gauge, one-port knitting machine, dyed with a disperse dye for polyester, and finished, as a result, the knitted fabric was inferior in elasticity and had a hard texture. Got.

It is an outline side view showing an example of the mixed fiber of the present invention. It is a schematic side view which shows an example of the mixed fiber of this invention which carried out boiling water treatment in a no-load state. It is a schematic diagram which shows an example of the manufacturing method of the mixed fiber of this invention.

Explanation of reference numerals

(A): Polyester composite fiber yarn (b): Other filament yarn (c): Mixed yarn (d): Polyester composite fiber yarn (e): Other filament yarn (f): Mixed fiber yarn
1: Polyester composite fiber yarn
2: Other filament yarn
3: Spring tensor
4: Water application guide
5: Feed roller
6: Fluid turbulent nozzle
7: Delivery roller
8: Tube heater
9: Feed roller 10: Take-up roller 11: Cheese

Claims (10)

A mixed yarn obtained by mixing a polyester-based composite fiber yarn of a side-by-side type or an eccentric sheath-core type, in which at least one of the constituent components is made of polytrimethylene terephthalate, and another filament yarn, the yarn A mixed fiber yarn characterized in that the number of loops protruding from the surface by 0.35 mm or more is 250 / m or more, and the number of loops protruding 2.0 mm or more from the yarn surface is 5 / m or less. The mixed fiber according to claim 1, wherein the other component of the polyester-based composite fiber yarn is composed of polyethylene terephthalate. The mixed fiber according to claim 1 or 2, wherein an elongation recovery rate at 10% elongation is 90% or more. The mixed fiber according to any one of claims 1 to 3, wherein the weight ratio of polyethylene terephthalate / polytrimethylene terephthalate of the polyester-based composite fiber is 30/70 to 70/30. The mixed fiber according to any one of claims 1 to 4, wherein the other filament is a polyethylene terephthalate filament. The mixed fiber yarn according to any one of claims 1 to 4, wherein the other filament yarn is a polytrimethylene terephthalate filament yarn. The mixed yarn according to any one of claims 1 to 4, wherein the other filament yarn is a polyamide filament yarn. A woven or knitted fabric using the mixed fiber according to any one of claims 1 to 7. A polyester composite fiber yarn of a side-by-side type or an eccentric sheath-core type in which at least one of the constituent components is made of polytrimethylene terephthalate is supplied at an overfeed rate of 6% or more and 20% or less, and another filament yarn is supplied. A method for producing a mixed fiber yarn, comprising supplying the yarn at an overfeed rate equal to or higher than the polyester fiber yarn, joining the two yarns, and performing a fluid turbulent flow treatment. A woven or knitted fabric using the mixed fiber yarn produced by the method for producing a mixed fiber yarn according to claim 9.

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