EP1154055B1 - Polyester yarn and method for production thereof - Google Patents

Polyester yarn and method for production thereof Download PDF

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Publication number
EP1154055B1
EP1154055B1 EP00976251A EP00976251A EP1154055B1 EP 1154055 B1 EP1154055 B1 EP 1154055B1 EP 00976251 A EP00976251 A EP 00976251A EP 00976251 A EP00976251 A EP 00976251A EP 1154055 B1 EP1154055 B1 EP 1154055B1
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EP
European Patent Office
Prior art keywords
yarn
polyester yarn
dtex
modulus
polyester
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Expired - Lifetime
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EP00976251A
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German (de)
English (en)
French (fr)
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EP1154055A4 (en
EP1154055A1 (en
Inventor
Katsuhiko Toray Nakatogari Apt. 2-21 MOCHIZUKI
Koji Toray Mishima-ryo E302 SUGANO
Yuhei Toray Yoroizaka-shataku B82 MAEDA
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Toray Industries Inc
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Toray Industries Inc
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    • 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
    • D03D15/40—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 structure of the yarns or threads
    • D03D15/41—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 structure of the yarns or threads with specific twist
    • 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
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/08—Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams
    • 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
    • D03D15/50—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 properties of the yarns or threads
    • D03D15/567—Shapes or effects upon shrinkage
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/04—Heat-responsive characteristics
    • D10B2401/046—Shape recovering or form memory
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/06—Load-responsive characteristics
    • D10B2401/061—Load-responsive characteristics elastic

Definitions

  • the present invention relates to polyester yarn comprising polytrimethylene terephthalate, and to a method for its production. More particularly, it relates to polyester yarn and to a method of producing polyester yarn which can be carried out stably at high speeds without package tightening and with little variation in properties in the fibre lengthwise direction and, furthermore, when the yarn is used to make a fabric, there is little sense of tightness because it stretches at a low modulus, and it has a soft handle.
  • Polytrimethylene terephthalate fibre is outstanding in its elastic recovery following elongation, possesses a low Young's modulus and soft bending characteristics and has good dyeing properties and, furthermore, chemically it has stable properties in the same way as polyethylene terephthalate.
  • Polytrimethylene terephthalate fibre is outstanding in its elastic recovery following elongation, possesses a low Young's modulus and soft bending characteristics and has good dyeing properties and, furthermore, chemically it has stable properties in the same way as polyethylene terephthalate.
  • US-A-3584103 and US-A-3681188 it has long been the subject of research as a potential clothing material.
  • the starting material 1,3-propanediol is comparatively expensive, so polytrimethylene terephthalate has not been used as a synthetic fibre hitherto.
  • EP-A-1033422 also proposes processes for producing PTT yarns.
  • the present invention has as its objective to provide a polyester yarn which shows no package tightening in the yarn production process so that a package of stable product quality is obtained and, furthermore, which has a low Young's modulus in the elastic recovery region, and is outstanding in its soft stretch properties and softness; together with a method for the production of this polyester yarn.
  • the present invention provides a polyester yarn which is a multifilament yarn substantially comprising polytrimethylene terephthalate and which has a strength from the stress-strain curve of at least 3 cN/dtex, a Young's modulus of no more than 25 cN/dtex, a minimum value of the differential Young's modulus at 3-10% extension of no more than 8 cN/dtex an elastic recovery following 10% elongation of least 90%, and a CV value of the continuous shrinkage in the yarn lengthwise direction of no more than 4%.
  • this polyester yarn can be obtained by a method of producing polyester yarn in which multifilament yarn obtained by the melt spinning of polymer substantially comprising polytrimethylene terephthalate having intrinsic viscosity [ ⁇ ] of at least 0.7 is hauled-off at a spinning rate of at least 2000 m/min and, without winding up, subjected to drawing and heat-treatment, after which it is continuously subjected to a relaxation heat treatment at a relaxation factor of 6 to 20% and wound-up as a package, wherein a textured roll of surface roughness 1.5S to 8S is used in the drawing and heat-treatment.
  • the present invention provides a woven fabric having such a polyester yarn as warp yarn and/or weft yarn in the form of a twisted yarn of twist coefficient 10,000 to 20,000.
  • the polyester yarn of the present invention is multifilament yarn substantially comprising polytrimethylene terephthalate.
  • the polyester from which the polyester yarn is composed is polytrimethylene terephthalate (hereinafter abbreviated to PTT) where at least 90 mol% of the structural units are obtained from terephthalic acid as the chief acid component and 1,3-propanediol as the chief glycol component.
  • PTT polytrimethylene terephthalate
  • copolymer components which can form other ester bonds, in a proportion which does not exceed 10 mol% and preferably does not exceed 6 mol%.
  • copolymerizable compounds examples include dicarboxylic acids such as isophthalic acid, succinic acid, cyclohexanedicarboxylic acid, adipic acid, dimer acid, sebacic acid and 5-sodiumsulphoisophthalic acid, and diols such as ethylene glycol, diethylene glycol, dipropylene glycol, butanediol, neopentyl glycol, cyclohexanedimethanol, polyethylene glycol and polypropylene glycol.
  • dicarboxylic acids such as isophthalic acid, succinic acid, cyclohexanedicarboxylic acid, adipic acid, dimer acid, sebacic acid and 5-sodiumsulphoisophthalic acid
  • diols such as ethylene glycol, diethylene glycol, dipropylene glycol, butanediol, neopentyl glycol, cyclohexanedimethanol, polyethylene glyco
  • titanium dioxide as a delustrant
  • fine silica or alumina particles as a lubricant
  • hindered phenol derivatives as an antioxidant and colouring pigments.
  • the strength of the polyester yarn of the present invention be at least 3 cN/dtex. If the strength is less than 3 cN/dtex, as well as this leading to fuzzing and yarn breakages in subsequent processing stages such as weaving, the product obtained will also have reduced tear strength.
  • the residual extension is preferably at least 40% and more preferably at least 45%.
  • the polyester yarn of the present invention has a Young's modulus of no more than 25 cN/dtex and that it has a minimum value of differential Young's modulus at 3-10% extension of no more than 8 cN/dtex.
  • These properties are closely related to the elongation characteristics and the elastic recovery characteristics in a stretch fabric, and in order to attain the soft stretch property which is the objective of the present invention it is preferred that these properties have low values. That is to say, by satisfying all the above properties, when in the form of a fabric there is easy initial stretch (low Young's modulus) and, furthermore, within the extension range of 3-10%, which is the practical stretch recovery region, elongation is possible with no resistance (low differential Young's modulus). Hence, it is possible to produce a soft stretch fabric which is outstanding in its comfort when worn.
  • the Young's modulus has a linear relationship to the flexural stiffness of the fabric, and the lower the Young's modulus the more outstandingly soft is the fabric handle. Hence, the Young's modulus is preferably no more than 22 cN/dtex and more preferably no more than 20 cN/dtex.
  • the minimum value of the differential Young's modulus at 3-10% extension is preferably no more than 5 cN/dtex.
  • the polyester yarn of the present invention has an elastic recovery of at least 90% following 10% elongation. If the elastic recovery is less than 90%, then there occurs the problem known as 'sagging' where, following elongation, there remains a portion which has undergone partial plastic deformation, so the woven material quality is reduced.
  • the elastic recovery following 10% elongation is preferably at least 95% and more preferably at least 98%.
  • yarn comprising PTT has outstanding elastic recovery is due to a considerable extent to its molecular structure.
  • the reasons are thought to be because, in the crystal structure of PTT, the methylene chain of the alkylene glycol moiety has a gauche-gauche conformation, and interaction due to the stacking of benzene rings is low and the density low, so that flexibility is high, and hence the molecular chains readily stretch and recover by means of methylene chain rotation in the alkylene glycol moiety.
  • the degree of crystallinity is preferably at least 30% and more preferably at least 35%.
  • the measurement of the degree of crystallinity was carried out based on the density in accordance with the density gradient column method of JIS L1013 (Chemical Fibre Filament Yarn Test Methods).
  • the boiling water shrinkage of the polyester yarn of the present invention is 3-15% and, moreover, the maximum value of the shrinkage stress is no more than 0.3 cN/dtex and the temperature at which the maximum value of shrinkage stress is shown is at least 120°C.
  • the boiling water shrinkage is one of the most important factors in terms of carrying out fabric design, and by making the boiling water shrinkage at least 3%, the setting properties are made favourable in subsequent processing stages, while by making it no more than 15% it is possible to obtain a fabric with a soft handle which is free of any sense of harshness.
  • the maximum value of the shrinkage stress is preferably no more than 0.3 cN/dtex and more preferably 0.15 to 0.25 cN/dtex.
  • the temperature at which the maximum value of shrinkage stress is shown is preferably at least 120°C and more preferably at least 130°C in order to facilitate subsequent processing such as setting and bulking-up.
  • the CV% of the yarn lengthwise direction continuous shrinkage factor be no more than 4%.
  • the CV% of the continuous shrinkage factor is an index of the uniformity of internal strain in the yarn lengthwise direction, and the smaller this value the higher the quality. In order to obtain fabric of high quality, the CV% is no more than 4%.
  • the CF (coherence factor) value lies in the range 1-30, by subjecting the polyester yarn of the present invention to an interlacing treatment.
  • the CF value is at least 1, it is possible to suppress single filament breakages at the time of yarn production and processing, and also at the time of weaving.
  • the CF value is no more than 30, when for example forming a combined yarn with different shrinkage as one component yarn, migration is facilitated, so this is preferred. It is further preferred that the CF value be 5 to 25.
  • the cross-sectional shape of the fibre from which the polyester yarn of the present invention is composed may be of circular cross-section, triangular cross-section, multilobal cross-section, flattened cross-section, X-shaped cross-section or other known profile section. Suitable selection may be made in accordance with the objectives.
  • the single filament fineness is preferably no more than 5 dtex and more preferably no more than 3 dtex.
  • the polyester yarn of the present invention there is a strong correlation between the twist coefficient and the stretch property and, once the twist coefficient exceeds a fixed value, there is a tendency for the stretch property to increase rapidly.
  • the percentage stretch is about 5%, but with a twist coefficient of 10,000 it is about 15% and with a twist coefficient of 14,000 it is about 30%.
  • the polyester yarn obtained in the present invention may be employed without twisting, it is more preferred that it be given a medium to hard twist with a twist coefficient of 10,000 to 20,000.
  • T the number of twists per metre of yarn length
  • T is the value determined by untwisting the yarn with an electrically-powered twist detector under a 90 x 10 -3 cN/dtex load, and dividing the number of 'untwists' when the yarn is completely untwisted by the yarn length following untwisting.
  • the form of the fabric of the present invention may be that of a woven material, knitted material, nonwoven material or cushion material, with suitable selection being made according to the objectives, and the fabric can be used, for example, in shirts, blouses, trousers, suits or blousons.
  • the intrinsic viscosity [ ⁇ ] of the PTT employed needs to be at least 0.7 in order to raise the spinnability at the time of yarn production and in order to obtain yarn of practical strength, but at least 0.8 is preferred.
  • continuous polymerization and spinning may be employed whereby, following the polymerization, the polymer is directly subjected to spinning and drawing, or alternatively the polymer may first be converted into chip and dried, and then the spinning and drawing carried out.
  • the spinning temperature at the time of the melt spinning is preferably a temperature 10-60°C higher than the melting point of the PTT in order to stabilize the discharge from the spinneret, and more preferably the melt spinning is carried out at a temperature equal to the melting point plus 20 to 50°C.
  • a heat shroud or suction device in order to suppress oligomer deposition in the spinning and to enhance the spinning properties, there may be optionally provided 2-20 cm below the spinneret a heat shroud or suction device, or a means for generating an inert gas such as air, steam or nitrogen for preventing oxidative degradation of the polymer or spinneret contamination.
  • the spinning rate be at least 2,000 m/min. By raising the spinning rate, the spinning tension is raised, and by making the yarn less susceptible to the effects of external disturbances the draw-down behaviour is made stable.
  • the spinning rate is preferably at least 3,000 m/min. Furthermore, in order to secure stable spinnability, it is preferred that the spinning rate be no more than 6,000 m/min.
  • the draw ratio be set such that the residual extension is at least 40%.
  • the relaxation factor at the time of the relaxation heat treatment following the drawing be made at least 6 to 20% in order to obtain the polyester yarn which is the objective of the present invention.
  • a relaxation heat treatment of at least 6% following drawing it is possible to accelerate the relaxation of internal strain in the fibre, so the level of delayed relaxation of the residual strain is low and package tightening is suppressed.
  • the relaxation heat treatment elongation is facilitated in the practical extension range (up to 10% extension) and it is possible to confer outstanding characteristics in terms of soft stretch properties.
  • the relaxation factor be at least 8%.
  • the relaxation factor is preferably no more than 20% and more preferably no more than 18%.
  • Figure 1 is a schematic diagram of the method using a cooling roller in the relaxation heat treatment. Following discharge from spinneret 1, cooling is carried out in chimney 2 , then convergence and oiling effected at oiling guide 3 and the yarn hauled-off and the temperature raised by first heated roller 4 , after which drawing and heat setting are performed between first heated roller 4 and second heated roller 5 . Furthermore, after passing through the drawing process, by employing the heat of second heated roller 5, a relaxation heat treatment is carried out between the second heated roller 5 and cooling roller 6 , and winding-up performed by winder 8 .
  • FIG. 2 is a schematic diagram of a method employing an interlacing nozzle in the relaxation heat treatment, and interlacing nozzle 7 has the role of a yarn cooling device and of a tension gradient controller. That is to say, by means of the interlacing treatment it is possible to lower the yarn tension prior to interlacing, so by utilizing the shrinkage stress produced by the heat of second heated roller 5 it is possible to perform a relaxation heat treatment between the second heated roller 5 and interlacing nozzle 7. In such circumstances, the relaxation factor can be controlled by varying the actuating air pressure of the interlacing nozzle.
  • the relaxation treatment may also be carried out using a heat treatment means employing hot air or steam as a heating medium between the second heated roller 5 and interlacing nozzle 7, or in two stages by providing a third heated roller.
  • the relaxation factor is readily controlled and they are methods which are favourably employed in obtaining a polyester yarn embodying the present invention.
  • the heated roller (the second heated roller in the examples illustrated in Figure 1 and Figure 2 ) which serves both for the drawing and heat setting and for the relaxation heat treatment
  • a textured roller of surface roughness 1.5S to 8S there be used.
  • the surface roughness is the section value of the maximum height (R max ) described in JIS B0601, and 1.5S to 8S in practice corresponds to the section values 1.6S, 3.2S, 6.3S. In terms of maximum height, this corresponds to more than 0.8 ⁇ m and up to 6.3 ⁇ m.
  • the surface roughness is at least 1.5S, the frictional coefficient between the yarn and roller is considerably reduced and there is a suitable degree of slip, so even at a high relaxation factor there is no winding of the yarn back on the heating roller, and stable yarn production is possible.
  • the surface roughness of the heated roller is more preferably 3.2S to 6.3S (R max : 1.7-6.3 ⁇ m). Now, the surface roughness is determined from measurement of the maximum height R max using a Hommel Tester model T1000, made by the Hommel Co., based on JIS B0601.
  • the drawing temperature (the temperature of the first heated roller) is preferably 10-50°C higher than the glass transition temperature of the PTT, and more preferably the drawing is carried out at the glass transition temperature plus 20 to 40°C.
  • the heat setting and relaxation heat treatment temperature (the temperature of the second heated roller) should be set within the range 90-180°C so as to achieve the desired percentage heat shrinkage but, in order to effect uniform relaxation of the residual stresses formed by the drawing, a temperature in the range 105-180°C is more preferred.
  • the spinning oil applied will contain, eg., lubricant, emulsifier and antistatic agent.
  • examples include mineral oils such as liquid paraffin, fatty acid esters such as octyl palmitate, lauryl oleate and isotridecyl stearate, dibasic acid diesters such as dioleyl adipate and dioctyl sebacate, esters of polyhydric alcohols such as trimethylolpropane trilaurate and coconut oil, aliphatic sulphur-containing esters such as lauryl thiodipropionate, nonionic surfactants such as polyoxyethylene oleyl ether, polyoxyethylene castor oil ether, polyoxyethylene nonyl phenyl ether and trimethylolpropane trilaurate, anionic surfactants such as alkyl sulphonate and alkyl phosphate type metal salts or amine salts, sodium dioctylsulphosuccinate and
  • the amount of oil applied is preferably 0.3 to 1.2 wt% in terms of the yarn.
  • sample polymer was dissolved in o-chlorophenol (abbreviated below to OCP) and the relative viscosity ⁇ r determined at a number of points, after which the value at infinite dilution was obtained by extrapolation.
  • OCP o-chlorophenol
  • the sample was subjected to measurement using a Tensilon UCT-100 produced by the Orientec Co., under constant rate of elongation conditions as described in JIS L1013 (Chemical Fibre Filament Yarn Test Methods).
  • the breaking extension was determined from the elongation at the point showing the maximum tenacity in the S-S curve.
  • Measurement was carried out at a rate of temperature rise of 2.4°C/sec using a thermal stress measurement device produced by Kanebo Engineering (Co.).
  • the density was measured in accordance with the Density Gradient Column Method in 7.14.2 of JIS L1013 (Chemical Fibre Filament Yarn Test Methods) and the degree of crystallinity obtained by the following formula.
  • X c [ % ] d c ⁇ d - d a / ( d ⁇ d c - d a ⁇ ⁇ 100
  • the yarn production characteristics were good and there were no yarn breaks or filament wrap-around. Furthermore, the strength of the polyester yarn obtained was 3.6 cN/dtex, the Young's modulus (initial resistance to stretching) was 20.8 cN/dtex, the minimum value of the differential Young's modulus at an extension of 3-10% was 1.8 cN/dtex, and the elastic recovery following 10% elongation was 97.8%.
  • the physical properties are shown in Table 1, and the stress-strain curve and the differential Young's modulus-strain curve are shown in Figure 3 .
  • the polyester yarn of Example 2 had a strength of 3.3 cN/dtex, which was lower than that of Example 1. Other characteristics were good in the same way as in Example 1. Moreover, while in the case of the polyester yarn of Example 3 the number of machine stoppages at the time of weaving increased to about twice when compared to Example 1, other properties were good.
  • Example 4 The same conditions were used as in Example 1 except that the relaxation factor between the second heated roller 5 and the cold roller 6 was adjusted to 6% [Example 4] or 18% [Example 5].
  • the polyester yarns of Example 4 and Example 5 were good in terms of their yarn production properties and woven material quality in the same way as in Example 1, and they had light soft stretchability. In particular, the woven material of Example 5 was even more outstanding in its softness than that of Example 1.
  • Example 1 The same conditions were used as in Example 1 except that there was employed homo-PTT of intrinsic viscosity [ ⁇ ] 0.68. The spinnability of the polyester of Comparative Example 1 was poor and there were numerous yarn breakages in the drawing zone, so sampling was impossible.
  • the polyester yarn of Comparative Example 2 had low strength and high extension, the strength being 2.9 cN/dtex and the extension 73.5%, and furthermore its elastic recovery following 10% stretching was low and the practical durability after forming a fabric was poor.
  • Example 2 The same conditions were used as in Example 1 except that the relaxation factor between the second heated roller 5 and the cold roller 6 was adjusted to 22% or 3%. In the case of the polyester yarn of Comparative Example 3 where the relaxation factor was 22%, there was considerable yarn oscillation over the second heated roller and, furthermore, yarn breakages occurred with yarn twisting around the second heated roller.
  • the relaxation factor was adjusted to 0%.
  • Comparative Example 5 there was marked package tightening exceeding even that of Comparative Example 4 and, furthermore, the fabric obtained had stretch characteristics in which elongation was extremely difficult, and it was also inferior in its softness.
  • Example 7 The same conditions were used as in Example 1 except that the second heated roller 5 was changed to a 0.8S (R max : no more than 0.8 ⁇ m) mirror surface roll.
  • the travelling yarn in the relaxation zone between the second heated roller and cold roller 6 was unstable, and oscillation occurred on the second heated roller, with winding back on the roller and numerous yarn breakages occurring.
  • the number of yarn breakages was about 10-fold.
  • the polyester yarn obtained in Example 1 was subjected to 2000 t/m (twist coefficient K: 14700) S/Z twisting to produce warp and weft yarns, and then a 1/4 twill fabric was produced. This was subjected to relaxation scouring at 98°C by the usual method, and then, intermediate setting carried out at 160°C. Subsequently, 15 wt% weight reduction was carried out with hot aqueous 3% NaOH solution, dyeing then performed and finish setting carried out. The fabric obtained was soft and its stretch properties were extremely outstanding.
  • 'relaxation factor' refers to the 'relaxation factor between the second heated roller and the cold roller 6';
  • the 'differential Young's modulus' refers to the 'minimum value of differential Young's modulus at an extension of 3 to 10%';
  • the 'elastic recovery' refers to the 'elastic recovery following 10% elongation';
  • the 'shrinkage stress' refers to the 'maximum value of shrinkage stress';
  • the 'peak temperature' refers to the 'temperature showing the maximum value of shrinkage stress';
  • the 'shrinkage CV%' refers to the 'CV% of the lengthwise direction continuous shrinkage';
  • the 'woven fabric quality' refers to the 'quality of the appearance of the woven fabric after dyeing (functional evaluation)'.
  • polyester yarn of the present invention With regard to the polyester yarn of the present invention and its method of production, as well as there being no package tightening in the yarn production stage and the package having a stable quality, it is possible to obtain woven fabric of low Young's modulus in the elastic recovery region and which is outstanding in its soft-stretch properties and softness.

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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)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Artificial Filaments (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Woven Fabrics (AREA)
EP00976251A 1999-11-18 2000-11-15 Polyester yarn and method for production thereof Expired - Lifetime EP1154055B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP32794399 1999-11-18
JP32794399 1999-11-18
PCT/JP2000/008040 WO2001036724A1 (fr) 1999-11-18 2000-11-15 Fil de polyester et son procede de production

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EP1154055A1 EP1154055A1 (en) 2001-11-14
EP1154055A4 EP1154055A4 (en) 2004-11-24
EP1154055B1 true EP1154055B1 (en) 2008-07-09

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EP00976251A Expired - Lifetime EP1154055B1 (en) 1999-11-18 2000-11-15 Polyester yarn and method for production thereof

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EP (1) EP1154055B1 (zh)
KR (1) KR100695694B1 (zh)
CN (1) CN1147627C (zh)
AT (1) ATE400681T1 (zh)
CA (1) CA2358715C (zh)
DE (1) DE60039413D1 (zh)
TW (1) TW477837B (zh)
WO (1) WO2001036724A1 (zh)

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WO2004011702A1 (en) * 2002-07-26 2004-02-05 Kolon Industries, Inc. A high strength low shrinkage polyester drawn yarn, and a process of preparing for the same
JP3928178B2 (ja) * 2002-08-07 2007-06-13 株式会社川島織物セルコン 弾性布帛と弾性面材
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EP1154055A4 (en) 2004-11-24
CA2358715A1 (en) 2001-05-25
TW477837B (en) 2002-03-01
KR100695694B1 (ko) 2007-03-15
ATE400681T1 (de) 2008-07-15
KR20010081027A (ko) 2001-08-25
CN1147627C (zh) 2004-04-28
EP1154055A1 (en) 2001-11-14
CA2358715C (en) 2008-07-29
DE60039413D1 (de) 2008-08-21
CN1327492A (zh) 2001-12-19
WO2001036724A1 (fr) 2001-05-25

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