EP3719183B1 - Multifilament de polyester très résistant à denier fin - Google Patents

Multifilament de polyester très résistant à denier fin Download PDF

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Publication number
EP3719183B1
EP3719183B1 EP18884607.5A EP18884607A EP3719183B1 EP 3719183 B1 EP3719183 B1 EP 3719183B1 EP 18884607 A EP18884607 A EP 18884607A EP 3719183 B1 EP3719183 B1 EP 3719183B1
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EP
European Patent Office
Prior art keywords
yarn
polyester multifilament
polyester
dtex
component
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Application number
EP18884607.5A
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German (de)
English (en)
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EP3719183A1 (fr
EP3719183A4 (fr
Inventor
Yusuke Ono
Ryota Suzuki
Minoru Fujimori
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Toray Industries Inc
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Toray Industries Inc
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Publication of EP3719183A1 publication Critical patent/EP3719183A1/fr
Publication of EP3719183A4 publication Critical patent/EP3719183A4/fr
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Classifications

    • 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
    • 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
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D01D5/34—Core-skin structure; Spinnerette packs therefor
    • 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
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
    • D02G3/04—Blended or other yarns or threads containing components made from different materials
    • D02G3/045—Blended or other yarns or threads containing components made from different materials all components being made from artificial or synthetic material
    • 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
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/36—Cored or coated yarns or threads
    • 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
    • D10B2401/06—Load-responsive characteristics
    • D10B2401/063—Load-responsive characteristics high strength
    • 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
    • D10B2505/00—Industrial
    • D10B2505/18—Outdoor fabrics, e.g. tents, tarpaulins
    • 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
    • D10B2507/00—Sport; Military
    • 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
    • D10B2509/00—Medical; Hygiene

Definitions

  • the present invention relates to a high-strength fine-denier multifilament that is excellent in weaving properties and wear resistance and that can be used in particular in a high-density thin woven fabric suitable for use with athletic and outdoor clothing.
  • Patent Document 1 a single-component polyester multifilament woven fabric is proposed.
  • the single-component polyester multifilament woven fabric has high strength because it contains polyethylene terephthalate having an intrinsic viscosity of 0.70 to 1.20, and has improved weaving properties because it contains 0.3 to 0.8 wt% of titanium oxide containing 60% or more of particles having a primary particle diameter of 0.1 to 0.6 um based on the total number of titanium oxide particles.
  • a polyester monofilament for screen gauze is proposed.
  • the polyester monofilament is a core-in-sheath composite yarn
  • a polyester used in the core component has a limiting viscosity of 0.70 or more so that the monofilament may have high strength
  • a polyester used in the sheath component has a limiting viscosity lower by 0.15 to 0.30 than that of the polyester used in the core component to suppress the scum (improve the wear resistance).
  • a multifilament polyester composite fiber is disclosed in EP 1512778 .
  • Patent Document 1 The single-component polyester disclosed in Patent Document 1, however, has a problem in wear resistance, and hardly meets the demand for durability in sophisticated uses.
  • Patent Document 3 it is difficult to make the monofilament into a high-density woven fabric, and the monofilament is unsuitable for use in clothing because a cloth made of the monofilament has high rigidity due to the high single-yarn fineness.
  • a core-in-sheath composite yarn technique is applied to a fine-denier multifilament, a core-in-sheath composite yarn having a small single-yarn fineness may inconveniently cause sheath breakage or may be excessively thinned in the sheath part so that sufficient wear resistance may not be ensured.
  • An object of the present invention is to solve the above-mentioned problems of the conventional techniques, and to provide a high-strength fine-denier polyester multifilament having excellent wear resistance and convergence for the purpose of providing a high-density thin woven fabric that combines excellent durability, weaving properties, and woven fabric quality and that is suitable for use with athletic and outdoor clothing.
  • the object of the present invention can be achieved using the following polyester multifilament.
  • the polyester multifilament is a polyester multifilament comprising core-in-sheath composite fibers, the core-in-sheath composite fibers comprising : a high-viscosity polyester as a core component; and a low-viscosity polyester as a sheath component, the core component and the sheath component forming a core-in-sheath composite, and that the polyester multifilament has a difference in intrinsic viscosity between the core component and the sheath component of 0.20 to 1.00, a total fineness of 4 to 30 dtex, a single-yarn fineness of 1.0 to 5.0 dtex, a breaking strength of 5.0 to 9.0 cN/dtex, a fracture elongation of 12 to 45%, a degree of interlacement of 2.0 to 15.0/m, and a number of filaments of 3 to 15.
  • the polyester multifilament is characterized in that the high-viscosity polyester as the core component has an intrinsic viscosity of 0.70 to 1.50, and the sheath component has an intrinsic viscosity of 0.40 to 0.70.
  • the high-strength polyester multifilament of the present invention has excellent wear resistance and convergence, and is capable of providing a high-density thin woven fabric that combines excellent durability, weaving properties, and woven fabric quality and that is suitable for use with athletic and outdoor clothing.
  • polyester multifilament of the present invention will be described.
  • the polyester multifilament of the present invention is made of a core-in-sheath composite fiber in which, in a cross section of a single yarn, a core component and a sheath component are arranged such that the core component is covered with the sheath component and the core component is not exposed to the surface of the polyester multifilament.
  • a core component and a sheath component are arranged such that the core component is covered with the sheath component and the core component is not exposed to the surface of the polyester multifilament.
  • the polyester used in the sheath component is required to have an intrinsic viscosity lower than that of the core component polyester, and the difference in intrinsic viscosity is preferably 0.20 to 1.00.
  • a difference in intrinsic viscosity of 0.20 or more can suppress the degree of orientation and degree of crystallinity of the sheath component polyester, that is, the polyester at the fiber surface of the polyester multifilament, and can provide satisfactory wear resistance.
  • the sheath component bears the shear stress at the inner wall surface of the discharge hole of the melt spinning spinneret, the core component receives weak shear force, has a low degree of molecular chain orientation, and is spun in a uniform state.
  • the finally obtained polyester multifilament has improved strength. Meanwhile, in order for the polyester multifilament to have high strength, the sheath component is also required to be moderately oriented. Therefore, if the difference in intrinsic viscosity is larger than 1.00, a satisfactory original yarn strength is not obtained. A more preferable difference in intrinsic viscosity of the polyester is 0.30 to 0.70.
  • the high-viscosity polyester as the core component used in the polyester multifilament of the present invention preferably has an intrinsic viscosity in the range of 0.70 to 1.50.
  • An intrinsic viscosity of 0.70 or more enables production of a polyester multifilament combining sufficient strength and elongation.
  • a more preferable intrinsic viscosity is 0.80 or more.
  • the upper limit of the intrinsic viscosity is preferably 1.50 or less from the viewpoint of ease of molding such as melt extrusion. In consideration of the production cost, the reduction in molecular weight due to molecular chain scission caused by heat or shear force in the production process, and the melt flow stability, the upper limit of the intrinsic viscosity is more preferably 1.20 or less.
  • an intrinsic viscosity of the low-viscosity polyester as the sheath component of 0.40 or more provides stable yarn-making properties.
  • a more preferable intrinsic viscosity is 0.50 or more.
  • the intrinsic viscosity is preferably 0.70 or less.
  • the polyester used in the polyester multifilament of the present invention may be a polyester containing polyethylene terephthalate (hereinafter referred to as PET) as a main component.
  • PET polyethylene terephthalate
  • PET used in the present invention may be a polyester containing terephthalic acid as a main acid component and ethylene glycol as a main glycol component, and containing 90 mol% or more of ethylene terephthalate repeating units. PET may, however, contain other copolymer components capable of forming an ester bond in a proportion of less than 10 mol%.
  • copolymer components include, as an acid component, bifunctional aromatic carboxylic acids such as isophthalic acid, phthalic acid, dibromoterephthalic acid, naphthalene dicarboxylic acid, and o-ethoxybenzoic acid, bifunctional aliphatic carboxylic acids such as sebacic acid, oxalic acid, adipic acid, and dimer acid, and dicarboxylic acids such as cyclohexanedicarboxylic acid, and as a glycol component, ethylene glycol, diethylene glycol, propanediol, butanediol, neopentyl glycol, bisphenol A, cyclohexane dimethanol, and polyoxyalkylene glycols such as polyethylene glycol and polypropylene glycol, but the copolymer components are not limited thereto.
  • bifunctional aromatic carboxylic acids such as isophthalic acid, phthalic acid, dibromoterephthalic acid, naphthalene di
  • PET may contain, as additives, titanium dioxide as a matting agent, silica or alumina fine particles as a lubricant, a hindered phenol derivative as an antioxidant, and further, a flame retardant, an antistatic agent, an ultraviolet absorber, a coloring pigment, and the like as required.
  • PET in the core component is mainly responsible for the strength of the polyester multifilament. Therefore, the amount of an inorganic particle additive usually added to a polyester fiber, which is typified by titanium oxide, is preferably 0.5 wt% or less. Meanwhile, PET in the sheath component is mainly responsible for the wear resistance of the polyester multifilament. Therefore, it is preferable to add inorganic particles typified by titanium oxide in an amount of about 0.1 wt% to 0.5 wt% to the sheath component.
  • the polyester multifilament of the present invention is a core-in-sheath composite polyester multifilament in which, in a cross section of a single yarn, the core component and the sheath component are arranged such that the core component is covered with the sheath component and the core component is not exposed to the surface of the polyester multifilament.
  • the polyester multifilament may have any of number of cross-sectional shapes, such as round, flat, triangular, square, and pentagonal cross-sectional shapes. In view of ease of achieving stable yarn-making properties and high-order processability as well as densification of a woven fabric, a round cross-sectional shape is preferable.
  • the composite ratio of core component : sheath component is preferably in the range of 60 : 40 to 95 : 5, and is more preferably in the range of 70 : 30 to 90 : 10.
  • the "composite ratio" defined in the present invention refers to, in a cross-sectional photograph of a single yarn of the polyester multifilament, a cross-sectional area ratio between two types of polyesters constituting the single yarn.
  • the polyester multifilament of the present invention is required to have a total fineness of 4 to 30 dtex.
  • a total fineness of 4 dtex or more enables stable yarn making and weaving, whereas a total fineness of 30 dtex or less may provide a desired high-density thin woven fabric.
  • a preferable range of the total fineness is 8 to 25 dtex.
  • the polyester multifilament of the present invention is required to have a single-yarn fineness of 1.0 to 5.0 dtex. If the single-yarn fineness is less than 1.0 dtex, it is difficult to form a desired core-in-sheath cross section, and sheath breakage tends to occur or the sheath component tends to have a small thickness so that the polyester multifilament may have insufficient wear resistance. Moreover, the process passability such as yarn-making properties and weaving properties also tends to deteriorate. A single-yarn fineness of 5.0 dtex or less may facilitate interlacing and improve convergence, and may provide an effect of improving process passability and weaving properties.
  • the obtained woven fabric has a satisfactory texture without being too hard while maintaining denseness.
  • a preferable range of the single-yarn fineness is 1.5 to 3.0 dtex. In order to achieve a single-yarn fineness in the above-mentioned range, in the method for producing a polyester multifilament, the discharge amount and the spinneret are required to be appropriately changed.
  • the polyester multifilament of the present invention is required to have a number of filaments of 3 to 15.
  • a number of filaments of 3 or more may facilitate interlacing.
  • an increased number of filaments can distribute the contact with a reed or a guide during the weaving among single yarns, the load of friction applied to a single yarn can be reduced, and the wear resistance of the original yarn and the durability of the woven fabric are greatly improved.
  • the upper limit of the number of filaments depends on the total fineness and single-yarn fineness, but is 15 or less.
  • the polyester multifilament of the present invention is required to have improved convergence in order to achieve excellent weaving properties and woven fabric quality. If the convergence is insufficient, filament breakage (separation into single yarns) may occur, the working of the warp during the weaving may be deteriorated, and the warp breakage may easily occur. Also in respect of the woven fabric quality, filament breakage may cause streak-like woven fabric defects.
  • the polyester multifilament of the present invention is required to have a degree of interlacement of 2.0 to 15.0/m, the degree of interlacement representing the number of interlacements per meter. If the degree of interlacement is less than 2.0/m, weaving properties tend to deteriorate, that is, warp breakage may occur. The obtained woven fabric tends to have streak-like woven fabric defects due to filament breakage, and tends to be poor in the woven fabric quality. A degree of interlacement of 2.0/m or more may provide excellent weaving properties and woven fabric quality.
  • the degree of interlacement is required to be 15.0/m or less. Further, when the degree of interlacement is further increased, the load in the interlacing step increases, yarn breakage frequently occurs, and the productivity may be reduced. A more preferable range of the degree of interlacement is 4.0 to 10.0/m.
  • the polyester multifilament of the present invention having a breaking strength of 5.0 cN/dtex or more may have sufficient mechanical properties even when being made into a thin woven fabric.
  • the breaking strength is more preferably 6.0 cN/dtex or more.
  • the orientation and degree of crystallinity are required to be suppressed from the viewpoint of wear resistance. Therefore, the breaking strength is 9.0 cN/dtex or less, more preferably 8.0 cN/dtex or less.
  • the polyester multifilament of the present invention having a fracture elongation of 120 or more can suppress yarn breakage and generation of fluff during the weaving, and is excellent in handleability.
  • the polyester multifilament of the present invention having a fracture elongation of 45% or less may have a desired breaking strength.
  • a more preferable range of the fracture elongation is 17 to 35%.
  • the 5% Mo is preferably 3.5 cN/dtex or more, more preferably 3.8 cN/dtex or more.
  • the 10% Mo is preferably 4.0 cN/dtex or more, more preferably 4.5 cN/dtex or more.
  • the 5% Mo is preferably 6.0 cN/dtex or less, more preferably 5.0 cN/dtex or less.
  • the 10% Mo is preferably 8.0 cN/dtex or less, more preferably 7.0 cN/dtex or less.
  • a feature of the method for producing a polyester multifilament of the present invention is that the position at which the filaments are interlaced is after the drawing.
  • the filaments are subjected to interlacing at the stage of an undrawn yarn, it is difficult to interlace the filaments in the ranges of the total fineness, single-yarn fineness, and number of filaments of the multifilament of the present invention. Therefore, interlacing the filaments at the stage after the drawing, at which the single-yarn fineness is reduced, can achieve a desired degree of interlacement.
  • a known interlacing nozzle can be used.
  • the compressed air pressure in the interlacement is preferably 0.10 to 0.40 MPa. If the compressed air pressure is less than 0.10 MPa, it is difficult to sufficiently interlace the filaments, whereas if the compressed air pressure exceeds 0.40 MPa, yarn breakage frequently occurs, and the productivity may be reduced.
  • the compressed air pressure is more preferably 0.15 to 0.30 MPa.
  • the method for spinning the polyester multifilament of the present invention is not particularly limited, and the polyester multifilament can be spun according to a known technique.
  • high-viscosity PET as a core component and low-viscosity PET as a sheath component are each melt-extruded and sent to a predetermined composite pack using a composite spinning machine, both the polymers are filtered in the pack and then bonded together in a core-in-sheath form and subjected to composite spinning with a spinneret, and a yarn discharged from the spinneret is taken up to produce an undrawn yarn.
  • the undrawn yarn may be subjected to a two-step method in which the undrawn yarn is wound up once and then drawn in a drawing machine, or a one-step method in which the undrawn yarn is continuously drawn without being wound up once.
  • the two-step method is more preferable because, in the interlacing described later, the filaments are hardly interlaced if the yarn speed is high.
  • the method for drawing the polyester multifilament of the present invention is not particularly limited, and the polyester multifilament can be drawn according to a known technique.
  • the drawing method can be suitably selected from a method of performing one-stage hot drawing between a first hot roll and a second hot roll, a method of performing one-stage hot drawing with a first hot roll, an unheated roll, and a hot plate between the rolls, a method of performing the first stage hot drawing between a first hot roll and a second hot roll and performing the second stage hot drawing between the second hot roll and a third hot roll, and the like.
  • the drawing method can be suitably selected from a method of performing one-stage hot drawing between a first hot roll and a second hot roll, a method of performing one-stage hot drawing with a first hot roll, an unheated roll, and a hot plate between the rolls, a method of performing the first stage hot drawing between a first hot roll and a second hot roll and performing the second stage hot drawing between the second hot roll and a third hot roll,
  • the drawing temperature of the polyester multifilament of the present invention in the case of one-stage drawing, it is preferable that the first hot roll usually have a temperature of (glass transition temperature of the high-viscosity PET as the core component) + 10 to 30°C, and the second hot roll or the hot plate have a temperature in the range of 130 to 230°C.
  • a temperature of the second hot roll or the hot plate of 130°C or more controls the orientation, promotes the crystallization of the fiber, and increases the strength.
  • a temperature of the second hot roll or the hot plate of 230°C or less prevents fusion at the hot roll or the hot plate, and provides satisfactory yarn-making properties.
  • the first hot roll have a temperature of (glass transition temperature of the high-viscosity PET as the core component) + 10 to 30°C
  • the second and subsequent hot rolls have gradually increased temperatures
  • the last hot roll have a temperature in the range of 100 to 230°C.
  • the polyester multifilament of the present invention is preferably drawn at a draw ratio of 3.0 to 7.0 in total.
  • the draw ratio is more preferably 3.5 to 6.0, still more preferably 3.8 to 5.0.
  • polyester multifilament of the present invention will be specifically described with reference to examples.
  • the measured values in the examples were measured by the following methods.
  • the relative viscosity ⁇ r defined by ⁇ / ⁇ 0 was determined according to the following mathematical formula at a temperature of 25°C using an Ostwald viscometer by dissolving 0.8 g of a sample polymer in 10 mL of o-chlorophenol (hereinafter abbreviated as "OCP") having a purity of 98% or more at a temperature of 25°C to prepare a polymer solution.
  • OCP o-chlorophenol
  • ⁇ is the viscosity of the polymer solution
  • ⁇ 0 is the viscosity of OCP
  • t is the dropping time of the solution (sec)
  • d is the density of the solution (g/cm 3 )
  • t 0 is the dropping time of OCP (sec)
  • d 0 is the density of OCP (g/cm 3 ).
  • a yarn was wound up into a 500-m skein, and a value obtained by multiplying the mass (g) of the skein by 20 was defined as the fineness.
  • breaking strength, fracture elongation, and strength at 5% elongation and strength at 10% elongation were measured according to JIS L1013 (1999) using TENSILON UCT-100 manufactured by ORIENTEC CORPORATION.
  • a yarn was floated on water, and the number of convergence points per meter was counted as the degree of interlacement. The number was counted 10 times, and the average of the counted numbers was calculated.
  • a yarn was subjected to a yarn tension of 0.9 g/dtex, a flat part of a reed (material: SK material, 7 mm in width ⁇ 50 mm in length ⁇ 50 um in thickness) was pressed against the yarn at a contact angle of 20°, and the yarn was subjected to a reciprocating motion at a stroke length of 30 mm and a speed of 670 times/min for 10 minutes.
  • the treated yarn was magnified and observed with a microscope.
  • the wear resistance of the original yarn was evaluated as "A" when no fluff or fibrillation (surface fraying) was observed, and was evaluated as "C" when fluff or fibrillation was observed.
  • a fabric was woven so that the fabric may have a basis weight in the range of 30 to 35 g/m 2 by adjusting the basis weight using a water jet loom according to the total fineness of the filaments used.
  • the weaving properties were evaluated as "S" when the number of loom stoppages per 100 m due to yarn breakage or the like was less than 3 times, "A” when the number of loom stoppages was 3 times or more and less than 10 times, and "C” when the number of loom stoppages was 10 times or more.
  • the weaving quality was evaluated by counting the total number of defects such as fluff and filament breakage.
  • the weaving quality was evaluated as "S” when the total number of defects was less than 3 per 100 m, "A” when the total number of defects was 3 or more and less than 10, and "C” when the total number of defects was 10 or more.
  • the wear resistance of the fabric was measured according to JIS L1096 (2010), method E (Martindale method). The test was performed under the conditions of a polyester standard friction cloth and a pressing load of 9 kPa. The judgment was made according to the number of friction cycles before the generation of fluff. The wear resistance of the fabric was evaluated as "A” when the number of friction cycles was 5,000 times or more, "B” when the number of friction cycles was 3,000 times or more and less than 5,000 times, and "C” when the number of friction cycles was less than 3,000 times.
  • polyester filaments were obtained under the production conditions shown in Tables 1 to 3 according to a known technique.
  • a yarn discharged from the spinneret was wound up once at a spinning speed of 1,200 m/min, and then drawn with a known drawing device between a first hot roll heated to 90°C and a second hot roll heated to 130°C at a draw ratio of 4.2 and heat-set.
  • the obtained drawn yarn was interlaced with an interlacing nozzle disposed between a final roll and a winder at an interlacing pressure of 0.23 MPa, and then wound up at 800 m/min.
  • polyester multifilament having a total fineness of 12.0 dtex, a single-yarn fineness of 2.4 dtex, a breaking strength of 6.5 cN/dtex, a fracture elongation of 17.7%, and a degree of interlacement of 5.8/m was obtained.
  • the polyester multifilament had satisfactory wear resistance of the original yarn.
  • Other physical properties of the original yarn were as shown in Table 1.
  • polyester multifilament Using the polyester multifilament, a fabric was woven with a water jet loom so that the fabric might have a basis weight of 30 g/m 2 . No yarn breakage occurred during 100 m of weaving, and the polyester multifilament had very satisfactory weaving properties. The obtained fabric was free from defects such as fluff, and had a very satisfactory weaving quality. In addition, the wear resistance of the fabric was satisfactory, and no fluff was generated even after a number of friction cycles of 6,000 times.
  • a polyester multifilament was obtained in the same manner as in Example 1 except that the draw ratio was changed to 3.9 and 3.6, respectively.
  • the original yarn of the obtained polyester multifilament had physical properties as shown in Table 1.
  • no yarn breakage occurred during 100 m of weaving and the polyester multifilament had very satisfactory weaving properties.
  • the obtained fabric was free from defects such as fluff, and had a very satisfactory weaving quality.
  • the wear resistance of the fabric was satisfactory, and no fluff was generated even after a number of friction cycles of 6,000 times.
  • a polyester multifilament was obtained in the same manner as in Example 1 except that the interlacing pressure was changed in the range of 0.08 to 0.42 MPa.
  • the original yarn of the obtained polyester multifilament had physical properties as shown in Table 1.
  • the degree of interlacement was 9.9/m, and satisfactory results were obtained as in Example 1 as for the wear resistance of the original yarn, weaving properties, weaving quality, and wear resistance of the fabric.
  • the degree of interlacement was 4.2/m, and the polyester multifilament had slightly lower convergence than that of Example 1. Therefore, 3 times of yarn breakage occurred during 100 m of weaving, but the polyester multifilament had satisfactory weaving properties.
  • the degree of interlacement was 1.7/m, and the filaments were insufficiently interlaced.
  • warp breakage frequently occurred, and loom stoppages occurred every few meters.
  • loom stoppages occurred every few meters.
  • filament breakage frequently occurred, and many streak-like defects were observed.
  • a polyester multifilament was obtained in the same manner as in Example 1 except that the interlacing position was changed to before winding of the spun yarn.
  • the physical properties of the original yarn of the obtained polyester multifilament were as shown in Table 2.
  • the degree of interlacement was 0.8/m, and the filaments were insufficiently interlaced.
  • warp breakage frequently occurred, and loom stoppages occurred every few meters.
  • loom stoppages occurred every few meters.
  • filament breakage frequently occurred, and many streak-like defects were observed.
  • a polyester multifilament was obtained in the same manner as in Example 2 except that the discharge amount and the number of holes of the spinneret were adjusted to change the total fineness, single-yarn fineness, and number of filaments.
  • the physical properties of the original yarn of the obtained polyester multifilament were as shown in Table 2. In Examples 6 to 8, the physical properties of the original yarn, weaving properties, weaving quality, and wear resistance of the fabric were comparable to those in Example 2. In Comparative Example 4, since the single-yarn fineness was as large as 5.6 dtex, the degree of interlacement was 1.2/m, and the filaments were insufficiently interlaced. During the weaving, warp breakage frequently occurred, and loom stoppages occurred every few meters.
  • the obtained fabric had a rough texture.
  • Comparative Example 5 single yarn breakage frequently occurred during spinning, and single yarn wrapping frequently occurred during drawing.
  • the obtained polyester multifilament had a single-yarn fineness as small as 0.8 dtex, and thus the degree of interlacement was as high as 18.8/m.
  • the polyester multifilament after the wear test of the original yarn had a large amount of fluff, and had poor wear resistance.
  • a polyester monofilament was obtained in the same manner as in Example 1 except that the number of holes of the spinneret was changed to one to change the discharge amount, and that no interlacing nozzle was used.
  • the physical properties of the original yarn of the obtained polyester monofilament were as shown in Table 2.
  • the obtained polyester monofilament frequently caused both warp breakage and weft breakage in a water jet loom, and no fabric was woven.
  • Example 2 Spinning was performed in the same manner as in Example 1 except that PET having an intrinsic viscosity of 1.00 was used as a core component and that the spinning speed was adjusted to 600 m/min.
  • the yarn was wound up once, and then drawn in the same manner as in Example 1 except that the yarn was subjected to two-stage drawing with a known drawing device between first and second hot rolls heated to 90°C and between the second hot roll and a third hot roll heated to 200°C at a draw ratio of 4.5 and heat-set, whereby a polyester multifilament was obtained.
  • the physical properties of the original yarn of the obtained polyester multifilament were as shown in Table 3. During the weaving, no yarn breakage occurred over 100 m, and the polyester multifilament had very satisfactory weaving properties.
  • the obtained fabric was free from defects such as fluff, and had a very satisfactory weaving quality. In addition, the wear resistance of the fabric was satisfactory, and no fluff was generated even after a number of friction cycles of 6,000 times.
  • a polyester multifilament was obtained in the same manner as in Example 9 except that PET having an intrinsic viscosity of 1.25 was used as a core component and that the spinning speed and the draw ratio were adjusted to 500 m/min and 5.8, respectively.
  • the physical properties of the original yarn of the obtained polyester multifilament were as shown in Table 3.
  • As for the wear resistance of the original yarn no fluff or fibrillation was observed, but 8 times of warp breakage occurred during 100 m of weaving.
  • the quality of the obtained fabric was lower than in Example 1 and fluff was observed.
  • the wear resistance of the fabric was lower than in Example 1, and fluff was generated after a number of friction cycles of 4,500 times.
  • PET having an intrinsic viscosity of 0.80 was used as a single component, and melted at a temperature of 295°C using an extruder type extrusion machine. Then, the polymer was allowed to flow into a known single-component spinneret having five holes at a polymer temperature of 290°C. A yarn discharged from the spinneret was wound up once at a spinning speed of 800 m/min, and then drawn with a known drawing device between a first hot roll heated to 90°C and a second hot roll heated to 130°C at a draw ratio of 4.3 and heat-set.
  • the obtained drawn yarn was interlaced with an interlacing nozzle disposed between a final roll and a winder at an interlacing pressure of 0.23 MPa, and then wound up at 800 m/min.
  • the physical properties of the original yarn of the obtained polyester multifilament were as shown in Table 3.
  • the wear resistance of the original yarn was lower than that in Example 1, and the polyester multifilament easily generated fluff. No yarn breakage occurred during 100 m of weaving, and the polyester multifilament had very satisfactory weaving properties.
  • fluff was observed in the obtained fabric, and the fabric was inferior to that of Example 1.
  • the wear resistance of the fabric was greatly lower than in Example 1, and generation of fluff was observed after a number of friction cycles of 500 times.
  • PET having an intrinsic viscosity of 0.80 as a core component and PET having an intrinsic viscosity of 0.50 as a sheath component were used, and subjected to spinning and drawing in a known direct spinning-drawing device.
  • a yarn discharged from the spinneret was taken up at a spinning speed of 1,300 m/min, and then drawn at a draw ratio of 3.8 without being wound up once and heat-set.
  • the obtained drawn yarn was interlaced with an interlacing nozzle disposed between a final roll and a winder at an interlacing pressure of 0.23 MPa, and then wound up at 5,000 m/min.
  • the yarn-making properties were inferior to those in the two-step method as in Example 1, and yarn breakage was observed at the interlaced portion.
  • the physical properties of the original yarn of the obtained polyester multifilament were as shown in Table 3.
  • the single-yarn fineness at the interlacing position after the drawing was 2.4 dtex, which was comparable to that of Example 1.
  • the speed of the yarn passing through the interlacing nozzle was as high as 5,000 m/min, so that the degree of interlacement was as small as 2.8/m. Since the degree of interlacement was inferior to that of Example 1, the polyester multifilament had poor convergence, and 7 times of yarn breakage occurred during 100 m of weaving. Although no fluff was observed in the obtained fabric, defects of filament breakage were observed, and the fabric was slightly inferior to that of Example 1.
  • a polyester multifilament was obtained in the same manner as in Example 11 except that the interlacing position was changed to before taking up of the spun yarn.
  • the physical properties of the original yarn of the obtained polyester multifilament were as shown in Table 3.
  • the degree of interlacement was 0.7/m, and the filaments were insufficiently interlaced.
  • warp breakage frequently occurred, and loom stoppages occurred every few meters.
  • loom stoppages occurred every few meters.
  • filament breakage frequently occurred, and many streak-like defects were observed.
  • Example 9 Example 10 Comparative Example 7 Example 11 Comparative Example 8 High-viscosity component (core component) Intrinsic viscosity 1.00 1.25 0.80 0.80 0.80 Low-viscosity component (sheath component) Intrinsic viscosity 0.50 0.50 - 0.50 0.50 Difference in intrinsic viscosity Core component - sheath component 0.50 0.75 - 0.30 0.30 Composite ratio Core component : sheath component 80 : 20 80 : 20 100 : 0 80 : 20 80 : 20 Production method Two-step method Two-step method Two-step method One-step method One-step method One-step method Spinning speed [m/min] 600 500 800 1300 1300 Draw ratio [times] 4.5 5.8 4.3 3.8 3.8 Interlacing position After drawing After drawing After drawing After drawing After drawing After drawing Spun yarn Single-yarn fineness at interlacing position [dtex] 2.4 2.4 2.4 2.4 9.1 Compressed air pressure in interlacement [MPa] 0.23 0.23 0.23 0.23 0.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Woven Fabrics (AREA)
  • Multicomponent Fibers (AREA)
  • Artificial Filaments (AREA)

Claims (2)

  1. Multifilament de polyester comprenant des fibres composites noyau-gaine, les fibres composites noyau-gaine comprenant :
    un polyester à haute viscosité en tant que composant de noyau ; et
    un polyester à faible viscosité en tant que composant de gaine,
    le composant de noyau et le composant de gaine formant un composite noyau-gaine, et
    le multifilament de polyester ayant une différence de viscosité intrinsèque entre le composant de noyau et le composant de gaine de 0,20 à 1,00, une finesse totale de 4 à 30 dtex, une finesse d'un seul fil de 1,0 à 5,0 dtex, une résistance à la rupture de 5,0 à 9,0 cN/dtex, un allongement à la rupture de 12 à 45 %, un degré d'entrelacement de 2,0 à 15,0/m et un nombre de filaments de 3 à 15,
    dans lequel la résistance à la rupture et l'allongement à la rupture sont mesurés conformément à la norme JIS L1013 (1999).
  2. Multifilament de polyester selon la revendication 1, dans lequel le polyester à haute viscosité en tant que composant de noyau a une viscosité intrinsèque de 0,70 à 1,50, et le polyester à faible viscosité en tant que composant de gaine a une viscosité intrinsèque de 0,40 à 0,70.
EP18884607.5A 2017-11-28 2018-11-09 Multifilament de polyester très résistant à denier fin Active EP3719183B1 (fr)

Applications Claiming Priority (2)

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JP2017227923 2017-11-28
PCT/JP2018/041591 WO2019107111A1 (fr) 2017-11-28 2018-11-09 Multifilament de polyester très résistant à denier fin

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EP3719183A1 EP3719183A1 (fr) 2020-10-07
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EP3719183B1 true EP3719183B1 (fr) 2024-08-14

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EP (1) EP3719183B1 (fr)
JP (1) JP7176413B2 (fr)
KR (1) KR102584803B1 (fr)
CN (1) CN111344442B (fr)
CA (1) CA3083877A1 (fr)
TW (1) TWI758566B (fr)
WO (1) WO2019107111A1 (fr)

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JP2555185B2 (ja) 1989-04-21 1996-11-20 帝人株式会社 無撚無糊織物の経糸用ポリエステル繊維
JP3693476B2 (ja) * 1997-10-22 2005-09-07 株式会社クラレ 高反発性布帛の製造に適した交絡糸
CN1243861C (zh) 2001-02-02 2006-03-01 旭化成株式会社 后加工性能优良的复合纤维及其制造方法
JP3778088B2 (ja) 2002-01-21 2006-05-24 東レ株式会社 スクリーン紗用芯鞘型複合ポリエステルモノフィラメントおよびその製造方法
US6846560B2 (en) * 2002-05-27 2005-01-25 Asahi Kasei Kabushiki Kaisha Conjugate fiber and method of producing same
CN100390341C (zh) * 2004-12-29 2008-05-28 东丽纤维研究所（中国）有限公司 复合加工丝及制备方法
JP2007154343A (ja) * 2005-12-02 2007-06-21 Toray Ind Inc ポリエステル芯鞘複合型部分配向繊維およびその製造方法
EP2037015B1 (fr) * 2006-07-03 2010-08-18 Kuraray Co., Ltd. Fibre conjuguée conductrice de structure à noyau gainé et son procédé de fabrication
JP5035117B2 (ja) 2007-05-29 2012-09-26 東レ株式会社 シート状物およびその製造方法
JP4992577B2 (ja) 2007-06-29 2012-08-08 東レ株式会社 ポリアミドマルチフィラメントおよびそれを用いた織物
JP4872865B2 (ja) 2007-09-25 2012-02-08 東レ株式会社 マルチフィラメントおよび高密度織物
JP2009150011A (ja) * 2007-12-20 2009-07-09 Teijin Fibers Ltd リサイクル原料を使用したポリエステルマルチフィラメント
JP5487629B2 (ja) * 2009-02-03 2014-05-07 東レ株式会社 ポリエステルモノフィラメントおよびその製造方法
JP2012012748A (ja) * 2010-07-05 2012-01-19 Teijin Fibers Ltd 制電性を有する極細混繊糸及び布帛
JP6582433B2 (ja) * 2015-02-20 2019-10-02 東洋紡株式会社 マルチフィラメント

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US20200318260A1 (en) 2020-10-08
EP3719183A1 (fr) 2020-10-07
KR102584803B1 (ko) 2023-10-05
KR20200088288A (ko) 2020-07-22
EP3719183A4 (fr) 2021-08-11
WO2019107111A1 (fr) 2019-06-06
TW201925557A (zh) 2019-07-01
JP7176413B2 (ja) 2022-11-22
CN111344442A (zh) 2020-06-26
CN111344442B (zh) 2022-07-12
JPWO2019107111A1 (ja) 2020-10-01
CA3083877A1 (fr) 2019-06-06
TWI758566B (zh) 2022-03-21

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