WO1999047734A1 - Fibre de polyester et son procede de production - Google Patents

Fibre de polyester et son procede de production Download PDF

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Publication number
WO1999047734A1
WO1999047734A1 PCT/JP1999/001421 JP9901421W WO9947734A1 WO 1999047734 A1 WO1999047734 A1 WO 1999047734A1 JP 9901421 W JP9901421 W JP 9901421W WO 9947734 A1 WO9947734 A1 WO 9947734A1
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WO
WIPO (PCT)
Prior art keywords
fiber
polyester fiber
yarn
false
polyester
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Application number
PCT/JP1999/001421
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English (en)
Japanese (ja)
Inventor
Tatsuya Ogawa
Hirotoshi Nishihata
Tadashi Koyanagi
Original Assignee
Asahi Kasei Kogyo Kabushiki Kaisha
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Application filed by Asahi Kasei Kogyo Kabushiki Kaisha filed Critical Asahi Kasei Kogyo Kabushiki Kaisha
Priority to KR1020007009665A priority Critical patent/KR100355087B1/ko
Priority to JP2000536911A priority patent/JP3647373B2/ja
Publication of WO1999047734A1 publication Critical patent/WO1999047734A1/fr

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Classifications

    • 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
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor

Definitions

  • the present invention relates to a polyester fiber having a highly deformed cross section to enhance water absorption properties, and suitable for high-speed drawing false twisting, a false twisted yarn obtained therefrom, and a method for producing the same. More specifically, the present invention provides a fiber which can maintain a high toughness without generating fluff even when high-speed false twisting is applied, even though the single yarn constituting the fiber has a W-shaped cross section.
  • the present invention relates to a polyester fiber and a method for producing the same.
  • the present invention further relates to a false twisted yarn having a reduced tendency to cause uneven dyeing between false twisted yarn cheeses. Background art
  • a concave portion is formed in the cross section of a single yarn of a fiber.
  • Polyester fiber is often used.
  • One of the polyester fibers having a concave portion in cross section is a polyester fiber having a W-shaped cross section, and it is known that the fiber is excellent in water absorption.
  • Polyester fibers having a W-shaped cross section are disclosed in Japanese Patent Application Laid-Open Nos. Sho 63-219, 1988, Sho 62-6933, and Sho 62-21838. issue It is known for its disclosure in Japanese Unexamined Patent Publication (KOKAI) No. 6-2383882.
  • Japanese Patent Application Laid-Open No. Sho 62-6933 which is a typical example, discloses that a multifilament consisting of a single yarn having a W-shaped cross section is required because a capillary is effectively formed between the single yarns.
  • a polyethylene terephthalate false twisted yarn having a W-shaped cross section with a single yarn surface being hydrophilic is used for producing a water-absorbent fabric. Is described.
  • Japanese Patent Laid-Open Publication No. Sho 50-1161717 discloses a method of obtaining a polyester false twisted yarn by stretching and pretwisting a pre-oriented (Pre-riented) polyester fiber. .
  • This method is different from the conventional method in which false twisted yarn was obtained by a three-stage method of low-speed spinning, one-stretching and one-twist, and high-speed spinning (250 to 500 Om / min).
  • This is a two-stage method of (stretching and continuous false twisting), which greatly reduces costs.
  • the polyester fibers supplied to the draw false twist can be roughly classified into those produced at a spinning speed of 2,500 to 3,500 mZ, and those produced at a spinning speed of 4,500 mZ. , 500 to 5,500 m / min.
  • the pre-oriented polyester fiber obtained at the spinning speed of 2,500 to 3,500 m / min is one of the indicators of the degree of fiber orientation, as shown in the area A in Fig. 2 below.
  • ⁇ Low orientation and low crystallinity '' with physical properties such as breaking elongation of 100 to 200% and boiling water shrinkage of 50 to 70%, one of the indices of fiber crystallinity. Fiber.
  • the draw ratio can be increased during the false twisting, and as a result, the speed of the false twisting process is increased, leading to an improvement in productivity.
  • the mainstream of the conventional draw false twisting process is to use pre-oriented polyester fibers in this region.
  • the unstretched polyester fiber yarn obtained in the latter spinning speed range of 4,500 to 5,500 OmZ has a breaking elongation as shown in the region B in Fig. 2 described later. It is a “highly oriented and highly crystalline” fiber with a degree of 50 to 100% and a boiling water shrinkage of 5 to 10%.
  • the polyester fiber in this region is disadvantageous for improving the productivity of false twisting due to a low draw ratio at the time of false twisting, but because of its high crystallinity, the false twisting speed is 500 m / min. There is an advantage that generation of fluff is small during the above-described high-speed false twisting.
  • polyester fibers in this area are not widely used due to problems such as low toughness (product of breaking strength X breaking elongation) of the processed yarn and large variation in dyeing after dyeing of the processed yarn. .
  • Japanese Patent Application Laid-Open (JP-A) No. 61-118 199 and Japanese Patent Application Laid-Open No. 10-183 No. 5 is known.
  • Japanese Unexamined Patent Publication No. Sho 61-113138 discloses an attempt to prevent glitter (terratera or shiny appearance) of drawn false twisted yarn of fiber having a scallop-shaped fiber cross section.
  • the front-oriented polyester fiber is characterized by its small deformation of the cross-sectional shape during draw false twisting, which is effective in preventing the glitch of the processed yarn and has excellent water absorption properties. ing.
  • Japanese Patent Application Laid-Open No. H10-18535 discloses that a pre-oriented polyester fiber having a W-shaped cross section is used in combination with a drawn yarn containing carbon black as it is.
  • the pre-oriented polyester fiber having a W-shaped cross-section is composited in a substantially undrawn state, and the black color of the carbon black-containing drawn yarn composited by using its dark color dyeing property is not noticeable. It is used for dyeing composite yarns.
  • This known technique does not suggest the draw false twisting property of the pre-oriented polyester fiber having a W-shaped cross section.
  • draw false twisting of a pre-oriented polyester fiber having an irregular cross section involves the occurrence of numerous yarn breaks and fluff during processing, the increase in dyeing unevenness of the processed yarn after dyeing, and the toughness of the processed yarn. It is known that there is a problem such as lowering According to the findings of the present inventors, it has been found that in the case of a fiber having a W-shaped cross section, the above-mentioned disadvantages are more remarkably exhibited than in the case of other modified cross-section yarns.
  • SS surging speed
  • Surging refers to false twisting caused by twisted spots in the twisting area of the stretch false twisting process. This is a phenomenon in which the tension fluctuates with a sine wave having a period of several seconds. It is impossible to perform stretch false twisting at a speed higher than the speed at which this surge phenomenon occurs.
  • a pre-oriented polyester fiber having a higher SS can employ a higher draw false twist rate, which is industrially advantageous. In conventional false twisting of yarns with round cross-section fibers, an industrially stable draw false twisting speed of about 80 to 90% of this SS is adopted.
  • An object of the present invention is to provide a pre-oriented polyester fiber which can be knitted and woven to obtain a fabric excellent in water-absorbing quick-drying and dyeing uniformity, and a method for producing the same.
  • a specific object of the present invention is to provide a pre-oriented polyester fiber consisting of a single yarn having a W-shaped cross section with improved false twisting properties.
  • a more specific object of the present invention is to An object of the present invention is to provide a pre-oriented polyester fiber composed of a single yarn having a W-shaped cross-section in which the generation of fluff is suppressed and the toughness of the fiber can be maintained even in the stretch-combustion processing.
  • FIG. 1 schematically shows the cross-sectional shape of a single yarn of the polyester fiber of the present invention.
  • Figure 2 shows the relationship between the elongation at break of polyester fiber and the shrinkage of boiling water.
  • FIG. 3 is a diagram showing an example of differential scanning calorimetry (DSC) of a polyester fiber.
  • FIG. 4 is a schematic explanatory view showing an example of an apparatus used for drawing false twist of pre-oriented polyester fiber.
  • FIG. 5 is a diagram schematically showing a W-shaped hole of a spinner used for producing the polyester fiber of the present invention.
  • FIG. 6 is a schematic explanatory view of a W-shaped spinning arrangement of a spinner used for producing the polyester fiber of the present invention.
  • the present invention basically provides a pre-oriented polyester fiber obtained by combining a W-shaped flatness of a cross section of a single yarn constituting a fiber, a breaking elongation of the fiber and a shrinkage of boiling water in a specific range. It achieves its goals.
  • the present invention relates to a fiber comprising 90% by mole or more of polyester composed of an ethylene terephthalate repeating unit, wherein a single yarn is obtained by dividing a long side of a circumscribed rectangle of the cross section by a short side.
  • a flatness of 2 to 4 and has a W-shaped cross-section has a flatness of 2 to 4 and has a W-shaped cross-section, and the fibers have the following (1) to (2) Polyester fiber characterized by satisfying characteristics.
  • the polyester referred to in the present invention is a polyester comprising 90% by mole or more of ethylene terephthalate repeating units composed of ethylene terephthalate repeating units, and the remaining component excluding the polyethylene terephthalate component is terephthalate.
  • a fiber-forming polyester that can be a dihydric acid or diglycol component other than monolic acid or ethylene glycol.
  • the fibers can be in any arbitrary form.
  • the fiber has various forms such as yarn as a fiber intermediate product for processing, and a knitted fabric, a fabric such as a woven fabric and an intermediate to final product.
  • Typical forms of yarn are spun yarn and multifilament yarn.
  • the W-shaped cross section of the single yarn referred to in the present invention is based on the W of an alphabet, and has three concave portions (a), (b) and (c) of a W-shape. ) And five convex portions (e), (f), (g), (h) and (i).
  • the opening angle of the concave portion is preferably from 100 ° to 150 °.
  • the flatness of the W-shape is the value obtained by dividing the long side (A) of the circumscribed rectangle including the vertices of the convex portions (e) to (i) that minimizes the area in the single yarn cross section by the short side (E).
  • the W-shape is preferably symmetrical with respect to the line (L) orthogonal to the long side (A) of the circumscribed rectangle at 1Z2 at the position of 1Z2 from the viewpoint of the stability of fiber spinning. It is not always necessary to have a strict line symmetry in the geometric sense.
  • the elongation at break is in accordance with the method described in JIS-L-1103 (1992), and a yarn length of 250 mm is measured with a high elongation measuring machine.
  • the elongation at break of the fiber measured at a speed of 500 mm / min.o
  • the boiling water shrinkage ratio is determined by making a skein of 20 turns with a measuring machine having a frame circumference of 1.125 m, and setting the skein to 0.0.
  • the skein is folded into a figure of eight and wrapped in a gauze cloth, wrapped lightly in gauze cloth, immersed in boiling water at 100 ° C for 30 minutes, and treated with hot water.
  • Boiling water shrinkage (%) [(L. one) /. XI 00
  • the present invention further relates to a fiber comprising 90% by mole or more of a polyester comprising ethylene terephthalate repeating units, wherein the single yarn has a long side of a circumscribed rectangle of its cross section and a short side.
  • the fiber has a W-shaped cross section having a flatness of 2 to 4 expressed by a value obtained by dividing the fiber by a value of 0.02 to 0.05 m on the surface.
  • This is a polyester fiber for stretch false twist, characterized by satisfying the following characteristics (1) to (3).
  • the polyester fiber of the present invention is a spout in which a plurality of holes perforated in a W-shape are arranged when melt-spinning a polyester comprising 90 mol% or more of ethylene terephthalate repeating units. And three projections of the W-shape are each provided with one projection at each end, and two projections at both ends, and each of the three recesses has an opening angle of 90 to 140 degrees. But Using the spinnerets that are all open in the same direction,
  • It is prepared by a method for producing a polyester fiber characterized by spinning and winding under the conditions including (1) to (4).
  • the spun fibers are cooled and solidified by blowing cooling air from a direction perpendicular to the opening direction of the W-shaped hole.
  • the finish is applied in such an amount that the thickness of the oil film on the surface of the single yarn of the fiber becomes 0.02 to 0.05 m.
  • polyester fiber according to the present invention the method for producing the same, and the draw false twisting of the polyester fiber according to the present invention will be described in detail.
  • polyester used in the present invention is a polyester composed of ethylene terephthalate repeating units.
  • Polyester is used as another dibasic acid component, for example, isophthalic acid, 5-sulfoisophtholic acid, adipic acid, etc., and as glycol components, propylene glycol, butylene glycol, polyoxyalkylene glycol, etc. And may contain other ester units containing
  • a third component such as a stabilizer, an anti-glare agent, an antistatic agent, or a flame retardant may be contained.
  • Figure 1 shows the cross section of a single yarn of the polyester fiber of the present invention.
  • 1 shows a schematic diagram of a shape.
  • the W-shape in the present invention refers to a shape having three concave portions and five convex portions based on the alphabet W.
  • the W shape must have a flatness of 2 to 4. If the flatness exceeds 4, the fluff during false twisting cannot be eliminated, and the power and the water absorption characteristics due to the capillary phenomenon will be insufficient. When the flatness is less than 2, the water-absorbing quick-drying property is insufficient.
  • the preferred flatness of the W-shaped cross section is 2.5 to 3.5.
  • the opening angle of each of the concave portions (a), (b) and (c) of the W-shaped cross section is related to the sharpness of the shape of the W-shaped cross section.
  • the opening angles need not all be equal, but are preferably between 100 and 150 degrees each. If the opening angle is less than 100 degrees, the W-shaped cross section is greatly deformed during the stretch false twisting, and the groove having the W-shaped cross section is crushed, and the water-absorbing quick-drying property is impaired. When the opening angle exceeds 150 degrees, the water-absorbing quick-drying property due to the capillary phenomenon, which is a characteristic of the W-shaped cross section, is insufficient.
  • the polyester fiber of the present invention needs to have a breaking elongation of 60 to 200% and a boiling water shrinkage of 45 to 70% in addition to the above cross-sectional shape.
  • FIG. 2 shows the range of the combination of the breaking elongation and the boiling water shrinkage of the present invention in a bold frame. Within the range of this combination, even if the stretch false twist is performed at 500 m / min or more, no fuzz is generated, and good false twist processing can be performed.
  • the elongation at break is in the range of 60 to 100% and the shrinkage of boiling water is in the range of 45 to 70%. This area is shaded inside the thick frame in Fig. 2.
  • FIG. 2 is a graph illustrating the region of the combination of the elongation at break and the shrinkage of boiling water of the pre-oriented polyester fiber of the present invention.
  • the pre-orientated polyester fiber in the area indicated by hatching in the enclosed area A is “highly oriented and low crystallinity”, which is the physical property of the area that has not been obtained until now. Processing characteristics were found.
  • the most preferable range of the combination of the breaking elongation and the boiling water shrinkage is 65 to 90% at a breaking elongation and 50 to 65% at a boiling water shrinkage.
  • the surface of the single yarn of the finishing oil is covered with a finishing oil film having a specific thickness.
  • a finishing oil film having a specific thickness For general-purpose polyester fibers, more than 0.6% of the oil is applied to the fiber weight, and the surface of the single yarn is usually covered with an oil film with a thickness of more than about 0.05 urn. I have.
  • the slip between the false twist element and the fiber is suppressed because the surface of the single yarn is covered with a thin oil film having a specific thickness.
  • the thickness of the oil film is preferably from 0.02 to 0.05 ⁇ m.
  • the oil film thickness exceeds 0.05 m, a slip with the friction body occurs, the SS speed decreases, and fluff is likely to occur during false twisting.
  • the preferred oil film thickness is from 0.03 to 0.05 mm.
  • the polyester fiber of the present invention preferably has a continuous fineness fluctuation value U% of 1.2% or less as a yarn length direction property, as measured by USTERRTESTR described later.
  • the continuous fineness variation value U% of a polyester fiber having a round cross section of a single yarn is generally about 1%. Spinning of polyester fiber with W-shaped cross section With yarn, it is difficult to reduce the continuous fineness fluctuation value u%. In spinning where the hole shape of the spinneret is simply W-shaped, the continuous fineness fluctuation value U% exceeds about 2%. When such a polyester fiber having a large continuous fineness variation value U% is subjected to high-speed drawing calcining, the false twist tension fluctuates and the false twist fluff is likely to occur, and the uniform dyeing of the false twisted yarn is further improved. Also tend to be impaired. A more preferred continuous fineness variation U% is less than 1.0%, and more preferably less than 0.9%.
  • the polyester fiber of the present invention has a crystallization exotherm Q (J / g) of 10 to 17 (J / g) and / or a crystallization exotherm measured by differential scanning calorimetry (DSC) described later. It is preferable that the peak temperature is 100 to 110 ° C.
  • the heat of crystallization is one of the indexes that reflect the crystallinity of the polyester fiber. If the heat of crystallization is large, the crystallinity of the polyester fiber is low. If the peak temperature of crystallization exotherm is high, the crystallinity is low.
  • the polyester fiber of the present invention has a low crystallinity and a crystallization heat value of 10 to 17 (J / g and Z, or a peak temperature of the crystallization heat of 100 to 110). ° C, it can be said that the fiber has a crystallized structure that has not been known in the past.Possibly, since the pre-oriented polyester fiber of the present invention is “highly oriented”, it has a differential scanning calorimetry. It is presumed to have a fine structure in which crystallization proceeds rapidly during the heating process of (DSC).
  • the processed yarn obtained by drawing and pre-twisting the pre-oriented polyester fiber described above has a toughness value expressed as the product of breaking strength and breaking elongation of 80 (g / d) ) Shows the above and has physical properties of elongation at break of 20 to 40%. False twisted yarns with a toughness value of less than 80 have insufficient strength to be used in fields such as sports shoes. 20% elongation at break If it is less than 10%, fuzz is generated during false twisting, which is not preferable. If the elongation at break exceeds 40%, the toughness will be insufficient.
  • the preferred breaking elongation of the processed yarn is 25 to 35%.
  • the polyester textured yarn of the present invention is superior to conventional textured yarn in water absorbency, and has a bulkiness indicated by the winding density of the textured yarn which is extremely higher than that of a textured yarn having a round cross-section single yarn. Since it has a low bending stress and an extremely soft texture, it has the feature of being less irritating to the skin and gentle. Further, the polyester-processed yarn of the present invention is excellent in ease of dyeing as compared with a false-twisted yarn of a normal drawn yarn drawn after spinning.
  • a typical polyester used for the production of the pre-oriented polyester fiber of the present invention is polyethylene terephthalate.
  • a polymer having an intrinsic viscosity [R] of ⁇ 0.6 to 1.0 is preferably used for spinning.
  • Melt spinning is performed using a general-purpose melt spinning apparatus equipped with a spinneret having a plurality of W-shaped spinning holes.
  • the polyethylene terephthalate is melted by an extruder, weighed by a gear pump mounted on a spin head, and extruded as a single yarn group from the spinneret.
  • the oil agent is applied with the oiling nozzle, and then the take-up roll or the high-speed winding machine without the roll It is wound up as a pre-oriented polyester fiber.
  • the running fiber Prior to winding, the running fiber may be entangled using an intersa.
  • the most preferred pre-oriented polyester fiber of the present invention basically has a surface temperature of the spinneret of 290 to 300 ° C, and is extruded, cooled, and solidified (filament). ) At 3,500 to 4,000 mZ Manufactured by taking.
  • the pre-oriented polyester fiber obtained based on such a spinning method has an elongation at break and a shrinkage rate of boiling water.
  • the pre-orientated polyester fiber in this region exhibits a crystallization exotherm of 10 to 17 jZg as measured by differential scanning calorimetry (DSC), and exhibits the above-mentioned preferable improved physical properties. It has physical properties suitable for false twisting.
  • W-shape hole is drilled in the spinneret as shown in Figure 5, each one of the protrusions into three convex portions of the W-shaped (alpha,), (a 2), (3, Each of the two end portions is provided with two projections (3), and the three recesses each have an opening angle of 90 to 150 degrees. It is arranged as exemplified in 5. If the spinning shape lacks the above-mentioned projections, the flatness of the polyester fiber becomes less than 2 when spinning at a spinneret temperature as described below. If the opening angle is less than 90 degrees, the flatness will be less than 2, and if it exceeds 140 degrees, the flatness will exceed 4. All three opening angles need not be the same, Equality is preferred for stability.
  • the spinning holes are preferably arranged such that all the W-shaped holes are opened in the same direction on the base surface as shown in FIG.
  • the arrangement of the spinning holes may be random, but in order to reduce the continuous fineness fluctuation value U%, it is effective to arrange the ridges in the direction of blowing the cooling air as shown in FIG.
  • the surface temperature of the spout is desirably as high as 285 to 300 ° C.
  • the surface temperature of the spout is usually 28 It is less than 5 ° C.
  • the preferred surface temperature of the spout is 290-295 ° C.
  • the physical properties of the present invention can be obtained by a combination of the blowing direction of the cooling air and the take-up speed.
  • the cooling air needs to be cooled and solidified by blowing laterally from the direction perpendicular to the opening direction of the concave portion of the W-shaped hole toward the extrusion filament (see Fig. 6). It is.
  • the cooling air has a temperature of about 20 ° C and an air velocity of 0.3 to 0.8 mZ.
  • the supply method of the finishing oil may be a roll method or a method using an oiling nozzle.
  • the adjustment of the oil film thickness is determined by the concentration of the emulsion and the supply amount when the finishing oil to be supplied is an aqueous emulsion.
  • the thickness of the oil film is less than 0.02 m, thread breakage is likely to occur during spinning of the polyester fiber. If the thickness is greater than 0.05 m, slippage occurs at the twisted portion during false twisting, and fluff is likely to occur.
  • the spinning speed is in the range of 300 to 450 OmZ.
  • the spinning speed is less than 300 m / min, the elongation at break exceeds 200%, and fluff is frequently generated during the false twisting process.
  • the spinning speed exceeds 4.50 OmZ, the boiling water shrinkage becomes less than 45%, and the dyeing variation of the false twisted yarn increases.
  • the fiber is guided to a stretched false twisting region and subjected to false twisting at the same time as drawing. After that, it is wound into a package as a processed yarn without or with the force of relaxation heat treatment.
  • a type of the stretch false twisting machine a friction type or a spindle type stretch false twisting machine can be used.
  • the heating heater a contact type or a non-contact type is adopted. The temperature of the heater is from 160 to 220 ° C. The number of false twists is usually 200 to 400 m.
  • the yarn speed of the draw false twisting process is 500 to 80 Om / min. This speed is extremely high as compared with the conventional speed of 200 to 40 Om / min, and the productivity of false twisting is improved.
  • FIG. 4 is a diagram schematically illustrating an example of a false twisting device.
  • a pre-oriented polyester fiber yarn multifilament yarn
  • a feed roll (2) and a false twist feed roll (4) After that, the yarn is fed to the false twist zone.
  • a false twist zone is formed between the tube heater (5) and the false twist disk (6).
  • the yarn is heated while being twisted between the false twist feed roll (4) and the false twist disk (6), and then passed through the relax feed roll (7) to be heated by the relax heater (8). ), Is heated and set, and is wound as a false twisted yarn (10) through a winding feed roll (9) into a cheese-like package.
  • (3) is an interlacer that is added as needed to provide confounding.
  • a feature of the pre-oriented polyester fiber of the present invention is that fluff generation is suppressed even in such high-speed false twisting. If the polyester fiber is not entangled with single yarn, it is preferable to add entanglement to the yarn prior to false twisting in order to suppress the generation of fluff.
  • the flatness was determined by the ratio of the long side A to the short side B of the circumscribed rectangle of the cross section of the single yarn of the fiber.
  • the elongation at break is measured with a USTERTENS ⁇ RA PID 3 made by Zellweger Uster Co., Ltd. in accordance with the method described in JIS-L-1013 (1992).
  • the breaking strength and the breaking elongation were determined at 5 O mm and a tensile speed of 500 mm / min.
  • the boiling water shrinkage was determined by making a skein with 20 turns using a scaler with a frame circumference of 1.125 m, applying an initial load of 0.025 g Zd to the skein, and lengthening the skein. Is measured.
  • the skein was folded into an annular shape, wrapped lightly in a gauze cloth, and the gauze was boiled 100. Submerge in C water for 30 minutes and treat with hot water. 30 minutes later, remove the sample together with the gauze, air-dry the sample on blotting paper, apply a load of 0.025 gZd again, measure the skein length L, after the treatment, and use the following formula.
  • the boiling water shrinkage at 100 ° C. was determined.
  • Boiling water shrinkage (%)-[(L. one) ZL. ] X I 0 0
  • DSC differential scanning calorimetry
  • the DSC measurement was carried out at a heating rate of 20 ° CZ for a range of 50 ° C to 300 ° C.
  • a heating rate of 20 ° CZ for a range of 50 ° C to 300 ° C.
  • an example of the DSC measurement chart is shown in FIG.
  • the heat of crystallization Q is 100 ° C to 130 ° C in the DSC chart.
  • the area of the exothermic peak observed in the region was calculated by the analysis program attached to the DSC measurement device.
  • the water absorption is preferably at least 0%. When the content is 80% or more, it can be said that excellent water absorption is exhibited.
  • the false-twisted fluff pass rate was evaluated by drawing false-twisted polyester fibers, collecting 300 cheese packages of 4 kg in weight, and using a black cloth as a backing. The fluff present in the garment was visually counted, and the fluff-free cheese package was accepted as false twisted fluff. Then, the percentage of the number of cheese packages that passed false twisted yarn fluff for 300 cheese packages was evaluated as the false twisted yarn fluff pass rate. The rate must be at least 80%. It is good if it is 90% or more.
  • the outermost layer of the false-twisted cheese package is a tubular knitting machine manufactured by Glory Industries, Ltd.
  • the knitted fabric is dispersed with MINI — COLOURTYPEMCI 2 SL manufactured by Texam Giken Co., Ltd. and the dye is dispersed (Followne S-1 2GL Gran 200% manufactured by Oji Co., Ltd.) and the dye is dispersed.
  • a 3 wt% aqueous solution of the dispersant (Disperse TL manufactured by ME ISEICH EMICAL WORKS, LTD) is procured in a completely dispersed state, and the bath knitting is performed at a bath ratio of 1:18 at a temperature of 97 ° C for 30 minutes.
  • Polyester fiber is drawn and false-twisted, 300 cheese packages of 4 kg in weight are sampled, 50 cheeses are extracted at random, and one of them is used as a temporary reference false-twisted yarn.
  • the dyeing was evaluated and the average dyeing of the 50 cheese was determined.
  • the false-twisted yarn cheese of the same dyeing as the average dyeing was used again as a temporary reference false-twisted yarn, and the dyeing evaluation was carried out by the method of (1). After confirming that the average value of the dyeing of the yarn was less than ⁇ 0.25, the yarn was used as a formal standard false twist yarn.
  • this dyeing pass rate In order to carry out false twisting industrially stably, this dyeing pass rate must be 75% or more. If it is 80% or more, it is good. (9) Comprehensive evaluation of false twisted yarn
  • the false twist fluff passing rate, false twist dyeing dyeing pass rate, and false twist yarn toughness were comprehensively evaluated.
  • a mark that satisfies all of the false twist fluff passing rate of 80% or more, the dyeing passing rate of 75% or more, and the toughness of 80 or more is marked with a triangle.
  • False twisted fluff pass rate of 90% or more, dyeing pass rate of 80% or more, and toughness of 90 or more are marked with ⁇ , false false fluff pass rate of less than 80%, dyeing pass rate Those that are less than 75% or less than 80 toughness are marked with X.
  • the filament yarn was manufactured and false twisted under the conditions shown in (B) below.
  • Table 1 the effect of the surface temperature of the spinneret on the physical properties and the fiber structure of the polyester fiber and the quality of the fuzz after the draw false twisting and the passing rate of the dyeing It explains the effect of toughness on physical properties.
  • Cooling air was blown from a direction (90 °) perpendicular to the opening direction of the W-shaped hole.
  • polyester fibers of 8 kg volume were collected corresponding to each spinning surface temperature.
  • the flatness of the obtained polyester fiber was 3
  • the oil film thickness of the finishing agent was 0.04 m
  • U% was 0.8%.
  • the finishing oil used here consists of 8.5 wt% of fatty acid ester, 69 wt% of polyether, 20 wt% of modified silicone, 0.3 wt of antioxidant, and 2.2 wt% of other Composition, and this composition was used as a water emulsion containing 10% by weight of the substance.
  • an IVF 334 false twisting machine manufactured by Ishikawa Seisakusho was used for drawing false twisting of the polyester fiber.
  • the false twisting process will be described with reference to the false twisting device shown in Fig. 4.
  • a package (1) of pre-oriented polyester fiber is set, and the fiber (multifilament yarn) is unwound and supplied continuously to a yarn supply roll (2).
  • interlacing is applied between the yarn feeding feed roll (2) and the false twist feed roll (4) by the interlacer (3).
  • the draw ratio is set by the ratio of the false twist feed roll (4) and the relax feed roll (7), and the twist is applied to the yarn with the rotating false twist disc (6), and the disc is twisted. (6) and false twist feed roll
  • (6) is a configuration of five urethane disks. The draw ratio is set so that the elongation of the false-twisted yarn is 25%. 300 pieces were collected.
  • Example 2 The same polyethylene terephthalate polymer as in Example 1 was used to produce 120 denier / 30 filament polyester filament yarn and false twisting.
  • the effect of the spinning speed shown in Table 2 on the physical properties and fiber structure of the polyester fiber, and on the properties such as the fluff after dyeing false twisting, the passability of dyeing, and the toughness are also shown. explain.
  • spinning conditions and false twist conditions in this example and comparative examples are the same as those employed in Example 1 except for the following conditions.
  • Discharge rate The denier of the polyester fiber was set to 120 denier.
  • the flatness of the obtained pre-oriented polyester fiber yarn was 3, the oil film thickness of the finishing agent was 0.04 m, and U% was 0.8%.
  • the draw false twist was performed by setting the draw ratio so that the false twist yarn elongation was 35%.
  • Examples 5a to 10 in which the elongation at break and the shrinkage in boiling water of the pre-oriented polyester fiber yarn are within the ranges of 60 to 100% and 45 to 70%, respectively.
  • a it is possible to maintain a high level of false twist yarn passing rate and false twist dyeing pass rate, and it is possible to produce false twisted yarn having high toughness and good quality of false twist yarn.
  • the polyester fiber yarn of Comparative Example 3a having a high spinning speed and a non-boiling water shrinkage ratio of 45% or less has a low false twist dyeing pass rate, is inferior in false yarn quality, and has low toughness. Cannot produce a false twisted yarn with improved performance.
  • the drawing pre-combustion speed was increased from 50 O mZ min to 700 m / min, and The draw false twisting was performed by setting the draw ratio so that the elongation of the false twist yarn became 25%.
  • Table 3 shows the fluff passing rate, dyeing passing rate, and toughness of the obtained drawn false twisted yarn.
  • the pre-oriented polyester fibers obtained in the spinning speed region of Examples 8b to 1Ob exhibited elongation at break and shrinkage in boiling water of 60 to 200% and 45 to 100%, respectively.
  • the fiber satisfies the range of ⁇ 70%, the false twist yarn fluff passing rate and the false twist dyeing pass rate can be maintained at a high level even in the high-speed region where the drawing false twist speed is 700 mZ minutes, and the quality of the false twist yarn. Good products can be produced.
  • the fiber of Comparative Example 3b which has a high spinning speed and a boiling water shrinkage ratio far below 45%, has a high passing rate of false twisted yarn, but a low passing rate of false twist dyeing, and a low false twist yarn passing rate.
  • the grade was inferior and the toughness was so low that industrial production was not possible.
  • Example 2 Using the same polyethylene terephthalate polymer as in Example 1, production of 120 denier Z30 filament polyester fiber and provisional production Twist processing was performed. Table 4 shows the effect of flatness on the physical properties and fiber structure of polyester fibers, the quality of fluff and M ratio after stretch false twisting, the physical properties of toughness, and the false twisted yarn. The effects on water absorption at the time are shown below.
  • the spinning conditions and false twist conditions in this example and comparative examples are as follows.
  • the oil film thickness of the finishing agent of the obtained polyester fiber was 0.04 m.
  • the false-twisted yarn is obtained by setting the elongation ratio so that the elongation of the false-twist yarn is 25% and performing the false-twisting process.
  • the ratio of the long side to the short side of the W-shaped circumscribed rectangle was changed and the perforated gold was used.
  • a polyester fiber having a flatness of 2 to 6 was obtained.
  • the spinning conditions and false twist conditions in the examples and comparative examples are as follows.
  • the elongation at break of the obtained polyester fiber is 83%, the shrinkage ratio of boiling water is 53%, the heat of crystallization is 11.5 J / g, the flatness is 3, and the oil film thickness of the finishing agent is 0. 0.411, 1;% was 0.8%.
  • the temporary machined yarn is obtained by setting a stretching ratio so that the elongation thereof becomes 25% and performing a stretching preliminary firing.
  • polyester fibers having different opening angles were obtained by using perforated gold that was perforated with different opening angles.
  • Examples 14 to 17 show a sufficient water absorption of 70% or more, but in Examples 15 and 16 where the opening angle is in a preferable range, the water absorption of the fabric is 80%. As described above, excellent water absorption performance was exhibited.
  • Examples 18 to 21 explain the effect of the oil film thickness.
  • Production of 120 denier / 30 filament polyester fiber and false twisting were performed.
  • Table 5 shows the results on the oil film thickness of the finishing agent and the effect on the quality, such as the fluff and dyeing pass rate, of false twisted yarn obtained by stretch-twisting polyester fiber. Are shown together.
  • the spinning conditions and false twist conditions in the examples and comparative examples are as follows.
  • the obtained polyester fiber had a breaking elongation of 85%, a boiling water shrinkage of 55%, a crystallization calorific value of 13 J / g, a flatness of 3, and a U% of 0.8%.
  • the thickness of the oil film was adjusted by changing the amount of discharge when the finishing agent was applied in the spinning process by changing the number of rotations of the pump.
  • the false twisted yarn is obtained by setting the draw ratio so that the elongation becomes 25% and then performing the false twist.
  • the false yarn fluff passing rate was 80% or more at which mass production was possible.
  • the false twist yarn fluff passing rate is as high as 98 and 95%, and extremely high quality. False twisted yarn can be mass-produced.
  • the spinning conditions and false twist conditions in the examples and comparative examples are as follows.
  • the obtained polyester fiber had a breaking elongation of 93%, a boiling water shrinkage of 62%, a flatness of 3, and an oil film thickness of the finishing agent of 0.04 m.
  • False twist yarn The stretch ratio was set so that the elongation was 25%, and the stretch was false-twisted. As shown in the results of Examples 22 to 24, as the value of U% is as small as 0.9%, the passing rate of false twist yarn dyeing is as high as 90%, and high-quality false twist yarn can be mass-produced.
  • the present invention provides a pre-oriented polyester fiber having a W-shaped single yarn cross section which is improved especially as a raw yarn for a draw false twisting method, and a method for producing the same.
  • a fabric such as a knitted fabric which is excellent in water-absorbing quick-drying property and dyeing uniformity can be produced.
  • the present invention is a pre-oriented polyether fiber composed of a single yarn having a W-shaped cross section capable of performing draw false twist with suppressed generation of fluff, and is a high-quality polyester W-shaped for high toughness and water-absorbing quick-drying fabric. It is useful as a pre-oriented polyester fiber yarn material that can produce low-cost false twisted cross-section yarns.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Artificial Filaments (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

L'invention concerne une fibre de polyester comprenant un motif éthylène téréphtalate récurrent dans des proportions d'au moins 90 % en moles. Selon l'invention, des fils simples présentent une section transversale en forme de W possédant un degré de compression, représenté par une valeur obtenue par division de la longueur de l'arête la plus longue par la longueur de l'arête la plus courte d'un rectangle circonscrit pour une section transversale, compris entre 2 et 4. La fibre satisfait aux exigences (1) 60 % ≤ allongement à la rupture ≤ 200 %, et (2) 45 % ≤ rétrécissement à l'eau bouillante ≤ 70 %. Cette fibre de polyester est une fibre de polyester préorientée, présentant des caractéristiques de torsion améliorées lors d'un étirage à vitesse élevée, et s'utilise pour la production d'un fil retors simple pouvant être employé pour réaliser une étoffe présentant une excellente capacité d'absorption d'eau. Cette fibre de polyester peut être produite par filage par fusion du polyester mentionné ci-dessus, au moyen d'une filière de filage spécifique en forme de W, les exigences suivantes devant être satisfaites: (1) la température superficielle de la filière de filage est maintenue à au moins 285 °C, (2) de l'air frais est insufflé à partir de la direction perpendiculaire à la direction d'ouverture d'un pore en forme de W pour refroidir et solidifier le polyester, (3) une huile de finissage est appliquée sur la surface du fil simple dans des proportions telles que l'épaisseur d'un film d'huile sur la surface soit comprise entre 0,02 et 0,05 νm, et (4) la fibre est bobinée à une vitesse comprise entre 3000 et 4500 m/min.
PCT/JP1999/001421 1998-03-19 1999-03-19 Fibre de polyester et son procede de production WO1999047734A1 (fr)

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KR1020007009665A KR100355087B1 (ko) 1998-03-19 1999-03-19 폴리에스테르 섬유 및 그 제조법
JP2000536911A JP3647373B2 (ja) 1998-03-19 1999-03-19 延伸仮撚用ポリエステル繊維及びその製造方法

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JP7085798 1998-03-19
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120055965A (ko) * 2010-11-24 2012-06-01 도레이첨단소재 주식회사 실크라이크 폴리에스터 복합사 및 그 제조방법
CN111411404A (zh) * 2020-04-30 2020-07-14 浙江佳人新材料有限公司 一种再生半消光阳离子纤维的制备工艺

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1025634A (ja) * 1996-07-11 1998-01-27 Asahi Chem Ind Co Ltd フカツキのない捲縮加工糸
JPH1181083A (ja) * 1997-09-05 1999-03-26 Nippon Ester Co Ltd モケットパイル布帛

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1025634A (ja) * 1996-07-11 1998-01-27 Asahi Chem Ind Co Ltd フカツキのない捲縮加工糸
JPH1181083A (ja) * 1997-09-05 1999-03-26 Nippon Ester Co Ltd モケットパイル布帛

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120055965A (ko) * 2010-11-24 2012-06-01 도레이첨단소재 주식회사 실크라이크 폴리에스터 복합사 및 그 제조방법
KR101592602B1 (ko) 2010-11-24 2016-02-11 도레이첨단소재 주식회사 실크라이크 폴리에스터 복합사 및 그 제조방법
CN111411404A (zh) * 2020-04-30 2020-07-14 浙江佳人新材料有限公司 一种再生半消光阳离子纤维的制备工艺

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KR20010041497A (ko) 2001-05-25

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