WO2023080184A1 - Fibre de polyester et tissu tissé - Google Patents

Fibre de polyester et tissu tissé Download PDF

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Publication number
WO2023080184A1
WO2023080184A1 PCT/JP2022/041095 JP2022041095W WO2023080184A1 WO 2023080184 A1 WO2023080184 A1 WO 2023080184A1 JP 2022041095 W JP2022041095 W JP 2022041095W WO 2023080184 A1 WO2023080184 A1 WO 2023080184A1
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elongation rate
tension
fiber
polyester fiber
polyester
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PCT/JP2022/041095
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English (en)
Japanese (ja)
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亮太 鈴木
亮輔 志岐
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東レ株式会社
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Publication of WO2023080184A1 publication Critical patent/WO2023080184A1/fr

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/292—Conjugate, i.e. bi- or multicomponent, fibres or filaments

Definitions

  • the present invention relates to polyester fibers and textiles. More specifically, the present invention relates to a woven fabric having excellent soft stretchability, which is composed of conjugate fibers made of two types of polyester polymers.
  • a polyester fiber whose main component is polytrimethylene terephthalate (hereinafter referred to as PTT) has a high elongation recovery rate and a low Young's modulus, so it has excellent soft stretchability.
  • PTT polytrimethylene terephthalate
  • the invention described in Patent Document 1 and the invention described in Patent Document 2 are composed of two types of polyester-based polymers, and at least one of them is made of a polyester fiber mainly composed of PTT, thereby expressing a coiled crimp. As a result, it exhibits high bulkiness and excellent crimp development force, and proposes a high-quality fabric with excellent soft stretchability.
  • Patent Document 3 proposes a stretch fiber which is an eccentric core-sheath type composite fiber composed of two types of polymers, and which has improved wear resistance by covering the surface layer with a thin skin for the sheath portion.
  • the conjugate fibers described in Patent Documents 1 and 2 are woven as wefts of fabrics because the distance between the centers of gravity between the two components is narrow (hereinafter referred to as weft beating). ), the yarn is elongated and the coil pitch C of the yarn in the fabric before the heat treatment becomes large ((1) in FIG. 1). As a result, the stretch allowance of the woven fabric is reduced, and there is a problem that the original stretch performance of the yarn cannot be exhibited. For example, as shown in FIG. 1(1), in a fabric constructed by using conventional composite fibers for weft A and warp B, the weft A is stretched during weft beating, resulting in an increased coil pitch.
  • composite fibers with a small single yarn fineness for thin fabrics are easily affected by tension during weft beating, and the above-mentioned problem is remarkable.
  • the present invention is intended to solve the above-mentioned problems, and since the coil pitch can be maintained without stretching the fibers during weft beating, the woven fabric with the designed width has excellent soft stretchability and high fabric without wrinkles and wrinkles. It is a polyester fiber that can provide high-quality fabrics. For example, as shown in (2) of FIG. 1, in a fabric composed of the polyester fiber of the present invention using weft A and warp B, the weft A is not elongated during weft beating and the coil pitch C is maintained. can.
  • the difference in the elongation rate between the elongation rate A at a load of 3.5% with respect to the fineness and the elongation rate B at a load of 18.0% with respect to the fineness is 5.0% to 25.0. %, the polyester fiber according to (1).
  • the polyester fiber according to (1) or (2) which has a single filament fineness of 1.5 dtex or less.
  • the polyester fiber of the present invention has excellent soft stretchability and can provide high-quality stretch fabrics free from crimps and wrinkles.
  • FIG. 1 is a schematic diagram showing an example of melt spinning equipment used in the spinning process (direct spinning drawing method) preferably used in the present invention.
  • the polyester fiber of the present invention is a polyester fiber composed of two types of polyester polymers, and has an elongation rate A of 60% to 90% at a load of 3.5% with respect to fineness.
  • polyester fibers of the present invention are composed of two types of polyester polymers.
  • the polyester polymer include polyethylene terephthalate or its copolymer, polybutylene terephthalate, PTT, polyethylene naphthalate, polylactic acid and the like.
  • the coiled crimp characteristics are expressed by arranging two components with different heat shrinkage as composite fibers. Since the ability is exhibited by the stretching behavior of the high-shrinkage component with the low-shrinkage component as a fulcrum, the polyester polymer used for the high-shrinkage component is required to have high elongation and recovery properties. PTT and polybutylene terephthalate are preferred as the high-shrinkage component in terms of mechanical properties and chemical properties. More preferably, the high-shrinkage component is PTT because it can increase the difference in shrinkage rate, and the low-shrinkage component is preferably polyethylene terephthalate.
  • the polyester fiber of the present invention has a composite cross section formed by joining two types of polyester polymers.
  • the cross-sectional shape includes a side-by-side type, a core-sheath type, an eccentric core-sheath type, and a sea-island type.
  • the eccentric core-sheath type means that the core component is covered with the sheath component, and the position of the center of gravity of the core component in the cross section of the fiber is different from the center position of the cross section of the composite fiber.
  • An eccentric core-sheath type is preferred from the viewpoint of spinning stability and abrasion resistance when made into a fabric.
  • the polyester fibers of the present invention are long fibers and include processed yarns such as crimped yarns.
  • the total fineness is 33dtex to 167dtex, and the number of filaments is 24f to 72f.
  • the total fineness is preferably 56dtex to 84dtex and the number of filaments is preferably 48f to 72f from the viewpoint of soft stretchability when made into a woven fabric. More preferably, the total fineness is 56dtex and the number of filaments is 48f.
  • the elongation rate A at a load of 3.5% relative to the fineness indicates the degree of elongation of the yarn coil assuming a low tension during weft beating.
  • the elongation rate A (hereinafter referred to as elongation rate A) at a load of 3.5% with respect to the fineness is obtained by preparing two skeins of 10 m of the fiber sample and applying a load of 3.5% to the fineness ( Unit: g) and measure the sample length (L0) after 30 seconds, then apply a constant load of 100 g and measure the sample length (L1) after 30 seconds, and calculate the average value of the two pieces using the following formula. be.
  • Elongation rate A (%) L0/L1 x 100
  • the polyester fiber of the present invention has an elongation rate A of 60% to 90%.
  • the weft coil in the woven fabric is not elongated, and the woven fabric has sufficient stretchability due to the elongation of the yarn.
  • the lower the elongation rate A the better the stretchability of the fabric, but the smaller the coil pitch of the weft yarn, the higher the weave density due to shrinkage in the heat treatment process of the fabric, and the easier it is for wrinkles and creases.
  • the elongation rate A is 60% or more in terms of quality. Preferably, it is between 75% and 85%.
  • the elongation rate B at a load of 18% with respect to the fineness indicates the degree of elongation of the weft coil when the weft is constrained by the warp as a woven fabric.
  • This elongation rate B is obtained by preparing two skeins of 10 m of the fiber sample, applying a load (unit: g) of 18% to the fineness, measuring the sample length (L2) after 30 seconds, and then applying a constant load of 100 g. , and the sample length (L1) after 30 seconds is measured, and the average value of the two pieces calculated by the following formula.
  • Elongation rate B (%) L2/L1 x 100
  • the difference between the elongation rate B and the elongation rate A (hereinafter referred to as elongation rate difference) is preferably 5.0% to 25.0%.
  • the difference in the elongation rate between the elongation rate A at a load of 3.5% to the fineness and the elongation rate B at a load of 18.0% to the fineness is 5.0% to 25.0%.
  • the larger the difference the easier the weft stretches and the smaller the elastic force of the coil.
  • the elongation rate difference is 5.0% or more, the coil does not elongate under tension during weft beating or when it is constrained by the warp yarn, and the difference in the actual weaving width from the weaving width standard is small. is obtained, the inherent elastic force of the conjugate fiber can be fully exhibited in the woven fabric, and better stretchability can be obtained.
  • the elongation rate difference to 25.0% or less, a higher-quality woven fabric free from crimps and wrinkles can be obtained. More preferably 10.0% to 20.0%.
  • the polyester fiber of the present invention preferably has an orientation difference of 2.5 to 4.5 between the two types of polyester polymer components in the cross section of the fiber.
  • the degree of orientation indicates the orientation of the molecular chains of the polyester component, and greatly affects the crystallinity and shrinkage force of the component.
  • the composite ratio of the polyester fiber of the present invention is preferably 80:20 to 20:80 from the viewpoint of spinning property, crimp performance development, and dimensional homogeneity of the coil pitch in the fiber length direction, and a more preferable composite ratio is 70:30 to 30:70.
  • Composite ratio is the area ratio of two types of polyester polymer components constituting a single fiber in a cross-sectional photograph of the single fiber.
  • the polyester fiber of the present invention preferably has a single filament fineness of 1.5 dtex or less from the viewpoint of soft texture.
  • a more preferable single yarn fineness is 1.2 dtex or less.
  • a more preferable single yarn fineness is 0.8 dtex or less.
  • the thinner the single yarn fineness the lower the elastic force of the coil. Therefore, the stretchability is affected by the tension during weft striking in weaving and the tension by warp restraint, and the stretchability decreases.
  • the elongation rate A is 90% or less and the elongation rate difference is 5.0% or more, even if the single yarn fineness is 1.5 dtex or less, the tension during weft beating in weaving and the tension restrained by the warp are affected. It is preferable because it is difficult to receive and can achieve both stretchability and softness.
  • the polyester fiber of the present invention has a stretch ratio in the range of 55 to 95%.
  • the stretch ratio is a value indicating the degree of crimping, and the higher the stretchability, the higher the stretchability.
  • a more preferable stretching/elongation rate is in the range of 65 to 85%.
  • polyester fiber of the present invention examples include a method in which the fiber thread discharged from the spinneret is once wound on a drum and then drawn, and a method in which the fiber thread is continuously drawn in the spinning stage. . These manufacturing methods will be specifically described.
  • the polyester fiber of the present invention is produced by melt extruding two different types of polyester polymers, using a composite spinning machine, sending them to a predetermined composite pack, filtering both polymers in the pack, and then using a spinneret, for example, side-by-side type or It can be produced by a two-step method in which eccentric core-sheath type conjugate spinning is performed, the undrawn yarn is once wound, and then drawn to a predetermined breaking elongation with a conventional drawing machine. Alternatively, it can also be produced by a one-step method in which the fiber is extruded from a spinneret, subjected to conjugate spinning, and then drawn without being wound once. Considering that the fiber structure formation, that is, tension control from spinning to winding is easy, a one-step direct spinning and drawing method (hereinafter referred to as DSD method) is preferable.
  • DSD method direct spinning and drawing method
  • the difference in intrinsic viscosity between the two types of polyester polymers is preferably 0.15 or more.
  • a distribution plate type spinneret exemplified in Japanese Patent Laid-Open Nos. 2011-174215, 2011-208313, and 2012-136804. can be preferably used to obtain a desired cross-sectional shape.
  • the fiber structure formation control from drawing to winding can be controlled by drawing tension and relaxation tension, and the drawing tension and relaxation tension can be controlled within a desired range by the draw ratio and the speed of each roller.
  • the spinning speed is preferably 900 m/min to 1400 m/min, and the draw ratio is preferably 3.0 to 4.0 times.
  • the drawing tension is preferably 0.5 cN/dtex to 1.1 cN/dtex.
  • the drawing tension is preferably 0.5 cN/dtex to 1.1 cN/dtex.
  • a more preferable drawing tension is 0.7 cN/dtex to 1.0 cN/dtex.
  • the relaxation tension is preferably 0.1 cN/dtex to 0.3 cN/dtex.
  • the relaxation tension By setting the relaxation tension to 0.3 cN/dtex or less, an excessive decrease in the elongation rate A can be suppressed, and grains and wrinkles in the fabric can be suppressed, which is preferable. In addition, stable reeling properties can be obtained without winding tightness in package formation during winding.
  • a more preferred relaxation tension is 0.18 cN/dtex to 0.25 cN/dtex.
  • the heat setting temperature here is preferably 130°C to 180°C, more preferably 140°C to 165°C, as the temperature of the heating element (hot roll, hot plate, etc.) with the highest set temperature.
  • the heat setting time it is preferable to set the heat setting time to 1.5 ⁇ 10 ⁇ 4 seconds to 3.5 ⁇ 10 ⁇ 4 seconds.
  • the heat setting time By setting the heat setting time to 1.5 ⁇ 10 ⁇ 4 seconds or more, the orientation progresses and the contraction difference between the two components is promoted, thereby narrowing the coil pitch. As a result, the elongation rate A is lowered, the yarn does not elongate even under the weft tension, and the yarn falls within the specification of the woven fabric.
  • the heat setting time By setting the heat setting time to 3.5 ⁇ 10 ⁇ 4 seconds or less, an excessive decrease in the elongation rate A can be suppressed, and grains and wrinkles of the fabric can be suppressed, which is preferable.
  • stable reeling properties can be obtained without thread breakage during operation.
  • the polyester fiber of the present invention may be false twisted.
  • False twisting methods include a spindle method, a three-axis twister method, a belt nip method, and the like. It is preferable to use a spindle method when it is desired to strengthen the crimp, and it is preferable to use a triaxial twister or belt nip, which are friction false twisting methods, when it is desired to reduce the production cost by increasing the processing speed.
  • the heating method includes a contact type, a non-contact type hot plate, a high-temperature short heater, and the like.
  • a water jet loom, air jet loom, or rapier loom can be used for the weaving loom. Weaving with a water jet loom is preferable in terms of ease of weft insertion and weaving speed.
  • Relax heat treatment, intermediate setting, alkali weight loss dyeing, finishing setting, etc. can be performed after weaving.
  • the processing temperature is preferably 80° C. or higher in order to overcome the binding force of the fabric and sufficiently develop the crimp.
  • a woven fabric composed of the polyester fiber of the present invention has an elongation rate in the weft direction of the fabric of 5% to 30%.
  • the elongation rate in the weft direction of the fabric is set to 5% or more, it is possible to follow the expansion and contraction of the skin during exercise of the human body, and a comfortable wear can be obtained.
  • the elongation rate in the weft direction of the fabric is set to 30% or less, a good product free from crimps and wrinkles can be obtained.
  • the weave width standard ratio of the fabric composed of the polyester conjugate fiber of the present invention is preferably within the range of ⁇ 4.0%. More preferably, it is in the range of ⁇ 2.0%.
  • Intrinsic viscosity (IV) 0.8 g of a sample was dissolved in 10 mL of O-chlorophenol (OCP) with a purity of 98% or more, and the relative viscosity ⁇ r was determined by the following formula using an Ostwald viscometer at a temperature of 25 ° C., and the intrinsic viscosity IV was calculated. .
  • OCP O-chlorophenol
  • Fineness (dtex) skein weight (g) x 100
  • the orientation was measured under polarized conditions.
  • the degree of orientation was evaluated from the ratio of the Raman band intensities obtained under the parallel condition when the polarization direction coincided with the fiber axis and the vertical condition when the polarization direction was perpendicular to the fiber axis. Three arbitrarily selected single yarns were measured, and the average value was calculated.
  • the Raman band around 1615 cm ⁇ 1 of polyester and copolymer-containing polyester is attributed to the C ⁇ C stretching vibration mode.
  • the vibration direction is the mode parallel to the molecular chain. Since Raman scattering is strongly obtained when the vibration direction of the molecular chain and the polarization direction of the incident light match, the scattering intensity of this vibration mode changes in correlation with the degree of orientation.
  • Example 1 Polytrimethylene terephthalate (PTT) with an intrinsic viscosity of 1.44 as a core component, polyethylene terephthalate (PET) with an intrinsic viscosity of 0.51 as a sheath component, and both the PTT polymer and the PET polymer were extruded at 260°C using an extruder. After being melted at 280° C., it was weighed by a pump and set at a spinning temperature of 275° C. and flowed into the spinneret while maintaining the temperature.
  • PTT polytrimethylene terephthalate
  • PET polyethylene terephthalate
  • the composite ratio of the PTT component and the PET component was set to 50/50, and the mixture was flowed into a spinneret for eccentric core-sheath type composite fibers having 48 ejection holes. Each polymer merged inside the die to form an eccentric core-sheath composite shape in which the PTT polymer was included in the PET polymer, and was discharged from the die.
  • the yarn discharged from the spinneret was spun and drawn using the melt spinning equipment shown in FIG. That is, the conjugate fiber discharged from the spinneret 1 is cooled by the yarn cooling blower 2 so that the cooling start point is 79 mm, and the oil agent is applied by the oil agent applying device 3 in an amount of 0.8% by weight based on the weight of the fiber.
  • the film was drawn at a speed of 3780 m/min to a second hot roller (2HR) 6 heated to a temperature of 155° C., stretched at a draw ratio of 3.5, and heat-set for 2.5 ⁇ 10 ⁇ 4 seconds. Furthermore, the main entangling device 7 provides the main entanglement at an air pressure of 0.15 MPa, and the two godet rollers (the third godet roller (3GR) 8, the fourth godet roller (4GR) at a speed of 3704 m / min (relaxation rate 2.0 times). ) and 9), and then wound around a package 10 at a package winding speed of 3675 m/min to obtain a composite fiber of 56 dtex-48 filaments.
  • 2HR second hot roller
  • 4GR the fourth godet roller
  • the stretching tension was between 1 HR and 2 HR, and the relaxation tension was between 2 HR and 3 GR.
  • the stretching tension was 0.86 cN / dtex, and the relaxation tension was was 0.19 cN/dtex.
  • the fiber properties of this polyester fiber were as shown in Table 1.
  • a plain weave fabric with a standard width of 185 cm, a density of 152 ⁇ 122 threads/2.54 cm, and a basis weight of 122 g/m 2 was woven using a water jet loom.
  • the width of the obtained woven fabric was measured, and the result of calculating the woven width standard comparison was as shown in Table 1, and the width was good.
  • the resulting fabric was subjected to a relaxation heat treatment in an open soaper at a processing temperature of 95°C, after drying, intermediate set at 180°C and dyed at 120°C. After that, it was finished and set by a pin tenter method with dry heat at 160°C.
  • the obtained woven fabric was very excellent in softness and stretchability, and the quality of the woven fabric was good without grains or wrinkles.
  • Example 2 and 3 Comparative Examples 1 and 2 A polyester fiber was obtained in the same manner as in Example 1 except that the heat setting time at 2HR was changed as shown in Table 1. The fiber properties obtained are shown in Table 1.
  • the woven fabrics obtained in Examples 2 and 3 were excellent in softness, and the stretchability and quality of the woven fabric obtained in Example 1 were inferior but good. .
  • Examples 4-7 A polyester fiber was obtained in the same manner as in Example 1 except that the 1HR speed was changed to 945 to 1260 m/min and the draw ratio was changed as shown in Table 2 to change the drawing tension and the relaxation tension. .
  • the stretching tension was 0.5 to 1.1 cN/dtex
  • the relaxation tension was 0.10 to 0.30 cN/dtex
  • the obtained fiber properties are shown in Table 1.
  • Examples 5 and 6 the obtained fabrics were very excellent in softness and stretchability, and the quality of the fabrics was good without crimps or wrinkles.
  • Example 4 the softness and stretchability of the obtained fabric were very excellent, but the quality of the fabric was at an acceptable level although there were some grains and wrinkles.
  • Example 7 the resulting woven fabric was excellent in softness, had no wrinkles and wrinkles, and was inferior to Example 1, but had good stretchability.
  • Comparative Examples 3, 4, 5 In Comparative Example 3, a polyester fiber was obtained in the same manner as in Example 1 except that the 1HR speed was changed to 1400 m/min and the draw ratio was changed to 2.7 times, thereby changing the drawing tension and the relaxation tension. .
  • the stretching tension was 0.4 cN/dtex
  • the relaxation tension was 0.08 cN/dtex
  • the elongation rate A was as high as 96%
  • the obtained fabric had sufficient stretchability. I could't.
  • Comparative Example 4 a polyester fiber was obtained in the same manner as in Example 1 except that the 1HR speed was changed to 2360 m/min and the draw ratio was changed to 1.6 times, thereby changing the drawing tension and the relaxation tension. .
  • the stretching tension was 0.2 cN/dtex
  • the relaxation tension was 0.06 cN/dtex
  • the elongation rate A was as high as 98%
  • the obtained fabric had sufficient stretchability. I could't.
  • Comparative Example 5 a polyester fiber was obtained in the same manner as in Example 1 except that the 1HR speed was changed to 840 m/min and the draw ratio was changed to 4.5 times, thereby changing the drawing tension and the relaxation tension. .
  • the stretching tension was 1.2 cN/dtex
  • the relaxation tension was 0.35 cN/dtex
  • the elongation rate A was as low as 54%. rice field.
  • Comparative Examples 6 and 7 Comparative Example 6 was performed in the same manner as in Example 1 except that the relaxation tension was changed by changing the 3GR speed and 4GR speed to 3760 m/min (relaxation rate 0.5 times) and the package winding speed to 3730 m/min. A polyester fiber was obtained. As a result of measurement with a tension measuring device, the relaxation tension was 0.36 cN/dtex, the elongation rate A was as low as 56%, and the obtained woven fabric had many grains and wrinkles.
  • Comparative Example 7 was performed in the same manner as in Example 1 except that the relaxation tension was changed by changing the 3GR speed and 4GR speed to 3590 m/min (relaxation rate 5.0 times) and the package winding speed to 3560 m/min. A polyester fiber was obtained. As a result of measurement with a tension measuring device, the relaxation tension was 0.07 cN/dtex, the elongation rate A was as high as 95%, and the obtained fabric did not have sufficient stretchability.
  • Example 8 A polyester fiber was obtained in the same manner as in Example 1, except that the core component was changed to polybutylene terephthalate (PBT) having an intrinsic viscosity of 1.30. Table 3 shows the evaluation results of the properties of the obtained polyester fiber. The resulting woven fabric was excellent in softness, had no wrinkles and wrinkles, and was inferior to Example 1, but had good stretchability.
  • PBT polybutylene terephthalate
  • Examples 9-11 Polyester fibers were obtained in the same manner as in Example 1, except that the number of discharge holes of the spinnerets for eccentric sheath-core composite fibers was changed to 36, 24 and 72, respectively.
  • the elastic force of the coil was increased by increasing the fineness of the single yarn, and the obtained woven fabrics were excellent in stretchability, and wrinkles and wrinkles were not observed.
  • Example 10 was inferior to Example 1, but had good softness.
  • Example 11 was inferior to Example 1, but had good stretchability, excellent softness, and did not show crimps or wrinkles.
  • Example 12 A polyester fiber was obtained in the same manner as in Example 1, except that the side-by-side type conjugate fiber spinneret was used and a bimetallic shape was used. The resulting woven fabric was inferior to that of Example 1, but had good stretchability, excellent softness, and good fabric quality with no crimps or wrinkles.
  • Example 13 The polyester fiber obtained in Example 1 was heated to a secondary set heater temperature of 180° C. using a false twisting machine (the twisting part heater is a contact type, the secondary set heater is a non-contact type, and the processing mechanism is a friction type). , a two-stage heater false twisting process was performed at a processing speed of 500 m/min and a processing ratio of 1.04 times to obtain a false twisted yarn of 55 dtex-48 filaments. Weaving was carried out in the same manner as in Example 1 using the false twisted yarn as the weft yarn with a water jet loom so as to have a basis weight of 122 g/m 2 . The obtained woven fabric was very excellent in softness and stretchability, and the quality of the woven fabric was at an acceptable level although there were some grains and wrinkles.
  • Comparative example 8 A polyester fiber was obtained in the same manner as in Example 1, except that the core component was changed to polyethylene terephthalate having an intrinsic viscosity of 0.62. In Comparative Example 8, the elongation rate A was as high as 97.9%, and the obtained woven fabric did not have stretchability.
  • the polyester fiber of the present invention has excellent soft stretchability and can provide high-quality stretch fabrics free from crimps and wrinkles.

Abstract

La présente invention concerne une fibre de polyester qui est formée de deux types de polymères de polyester, tout en ayant un rapport d'allongement A de 60 % à 90 % sous une charge de 3,5 % par rapport à la finesse.
PCT/JP2022/041095 2021-11-08 2022-11-02 Fibre de polyester et tissu tissé WO2023080184A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002339169A (ja) * 2001-05-17 2002-11-27 Toray Ind Inc 潜在捲縮発現性を有するポリエステル複合糸およびその製造方法、パッケージ
WO2003100145A1 (fr) * 2002-05-27 2003-12-04 Asahi Kasei Fibers Corporation Fibre composite et procede de production
JP2006505712A (ja) * 2002-11-05 2006-02-16 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー ポリ（トリメチレンテレフタレート）複合繊維
JP2021055231A (ja) * 2019-10-01 2021-04-08 東レ株式会社 偏心芯鞘複合繊維

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002339169A (ja) * 2001-05-17 2002-11-27 Toray Ind Inc 潜在捲縮発現性を有するポリエステル複合糸およびその製造方法、パッケージ
WO2003100145A1 (fr) * 2002-05-27 2003-12-04 Asahi Kasei Fibers Corporation Fibre composite et procede de production
JP2006505712A (ja) * 2002-11-05 2006-02-16 イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー ポリ（トリメチレンテレフタレート）複合繊維
JP2021055231A (ja) * 2019-10-01 2021-04-08 東レ株式会社 偏心芯鞘複合繊維

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