WO2023228878A1 - ポリアミド異形断面繊維、および芯鞘型複合糸からなる繊維 - Google Patents

ポリアミド異形断面繊維、および芯鞘型複合糸からなる繊維 Download PDF

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WO2023228878A1
WO2023228878A1 PCT/JP2023/018709 JP2023018709W WO2023228878A1 WO 2023228878 A1 WO2023228878 A1 WO 2023228878A1 JP 2023018709 W JP2023018709 W JP 2023018709W WO 2023228878 A1 WO2023228878 A1 WO 2023228878A1
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Prior art keywords
fiber
core
sheath
cross
section
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PCT/JP2023/018709
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English (en)
French (fr)
Japanese (ja)
Inventor
雄大 渡邉
泰輔 岸田
千奈美 兼田
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東レ株式会社
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Priority to KR1020247030120A priority Critical patent/KR20250012535A/ko
Priority to JP2023540484A priority patent/JPWO2023228878A1/ja
Priority to CN202380019856.0A priority patent/CN118749036A/zh
Publication of WO2023228878A1 publication Critical patent/WO2023228878A1/ja

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • 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
    • D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
    • 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
    • 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
    • D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
    • 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
    • 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
    • D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
    • 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
    • D10B2401/02—Moisture-responsive characteristics
    • D10B2401/021—Moisture-responsive characteristics hydrophobic
    • 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
    • D10B2401/062—Load-responsive characteristics stiff, shape retention

Definitions

  • the present invention relates to a polyamide multifilament of irregular cross section used for clothing applications. More specifically, by using a multifilament made of polyamide modified cross-section fibers having specific grooves in clothing, it is possible to provide a woven or knitted fabric with excellent water repellency, practical durability, and color fastness.
  • Synthetic fibers such as polyamide and polyester have excellent mechanical and chemical properties, and are therefore widely used in clothing and industrial applications.
  • Patent Document 1 proposes a composite fiber having a so-called gear-shaped cross section, which has a protrusion shape with alternating protrusions and grooves in the core.
  • Patent Document 2 proposes a composite fiber that has a groove in its core and has a cross section in which the width of the wide part of the groove is 1.3 times or more the width of the groove entrance.
  • Patent Document 3 proposes a fiber having 20 or more grooves on the fiber surface with a groove depth that is twice or more the groove width.
  • the woven or knitted fabric undergoes complex deformation due to the intense action of wearing it.
  • it is required to have practical durability that is resistant to deformation, abrasion, and tearing, as well as washing durability that maintains functionality and does not fade.
  • the fibers described in Patent Document 1 and Patent Document 2 become fabrics made of polyamide fibers having a gear-shaped cross section and a teardrop-shaped slit cross section after the sheath component is eluted and removed, and the fibers have water repellency and washing durability. Although it has excellent durability, it has poor practical durability against scratches and tears, and color fading occurs when washed.
  • the fibers described in Patent Document 3 exhibit water-repellent properties due to the grooves, the grooves are deep, so the protrusions formed by the grooves are likely to peel off from the roots due to rubbing and deformation due to wear, making it difficult to use against friction. It has poor durability, and its water repellency is also poor in washing durability and color fading occurs.
  • the present invention solves the above problems, and provides polyamide irregular cross-section fibers that have excellent water repellency and water repellency durability, tear and abrasion resistance, practical durability, and washing dye fastness, and the polyamide irregular cross-section fibers. It is a fiber made of core-sheath type composite yarn that can provide the following properties.
  • the present invention employs the following configuration.
  • a plurality of grooves exist on the outer periphery of the fiber cross section of a single fiber, and the radius of curvature d of the entrance corner of the groove, the groove depth H, and the circumscribed circle diameter D of the fiber cross section are expressed by the following formula (1),
  • the radius of curvature d of the inlet corner, the groove depth H, and the circumscribed circle diameter D of the cross-sectional shape of the core part satisfy the following formulas (1) and (2), d/D ⁇ 0.030...Formula (1) 0.10 ⁇ (H/D) ⁇ 0.30...Formula (2)
  • a fiber made of a core-sheath type composite yarn whose elongation and strength before and after dissolving and removing the sheath portion satisfy the following formulas (3) and (4).
  • the polyamide irregular cross-section fiber of the present invention and the fiber made of the core-sheath type composite yarn have excellent water-repellent performance and water-repellent durability even under usage environments where textile products are subject to elongation, bending, and harsh abrasion during use. It is possible to provide a woven or knitted fabric that is excellent in practical durability, resistant to tearing and abrasion, and excellent in washing color fastness.
  • FIG. 1 is a cross-sectional view for explaining the polyamide irregular cross-section fiber of the present invention.
  • (a) is a cross-sectional view of a single yarn of a polyamide irregular cross-section fiber, showing the circumscribed circle diameter D and the groove depth H.
  • (b) and (c) are cross-sectional aspects of one embodiment of the core-sheath type composite yarn of the present invention,
  • (b) is a polyamide modified cross-section fiber with a sheath polymer arranged only in the groove, and
  • (c) is a polyamide fiber with a modified cross-section.
  • a sheath polymer is arranged to cover the entire core polymer, including grooves of irregular cross-section fibers.
  • FIG. 2 is a schematic diagram for explaining the radius of curvature d of the entrance corner of the groove of the polyamide irregular cross-section fiber of the present invention.
  • FIG. 3 is a schematic diagram of an embodiment of a manufacturing apparatus that can be preferably used in the method for manufacturing a core-sheath type composite yarn of the present invention.
  • the polyamide referred to in the present invention is a resin consisting of a high molecular weight body in which a so-called hydrocarbon group is connected to the main chain via an amide bond.
  • Such polyamides have excellent spinning properties and mechanical properties, and are mainly polycaproamide (nylon 6), polyhexamethylene adipamide (nylon 66), polyundecanoamide (nylon 11), polypentamethylene adipamide ( Nylon 56), polypentamethylene sepacamide (nylon 510), polyhexamethylene sebacamide (nylon 610), etc., and copolymers containing these as main components are preferred; polycarbonate is difficult to gel and has good spinning properties.
  • Proamide (nylon 6) is more preferred.
  • the above-mentioned "mainly” means, for example, in the case of polycaproamide, the ⁇ -caprolactam unit constituting the polycaproamide is 80 mol% or more, more preferably 90 mol% or more.
  • Other components include, but are not particularly limited to, polydodecanamide, polyhexamethylene adipamide, polyhexamethylene azeramide, polyhexamethylene sebacamide, polyhexamethylene dodecanoamide, polymethaxylylene adipamide, etc. Units such as aminocarboxylic acid, dicarboxylic acid, and diamine, which are monomers constituting polyamide, polyhexamethylene terephthalamide, polyhexamethylene isophthalamide, etc., can be mentioned.
  • titanium oxide is often used as a matting agent for polyamide, but the polyamide of the present invention may also contain titanium oxide as a matting agent.
  • the content of titanium oxide may be set as appropriate within a range that does not impede the effects of the present invention, and the preferred range is 0 to 2% by weight.
  • various additives other than the above-mentioned titanium oxide may be contained within a range that does not impede the effects of the present invention. Examples of such additives include stabilizers such as manganese compounds, heat resistant agents, and flame retardants.
  • the cross-sectional shape has a plurality of grooves formed on the outer periphery.
  • Water repellency is achieved by trapping an air layer between the water droplets and the fiber surface through the grooves. Furthermore, when applying a water repellent finish, since the inside of the groove is not subject to external abrasion, the water repellent that has penetrated inside the groove is difficult to fall off, resulting in water repellency and durability.
  • the preferred number of grooves is 3 to 16.
  • the shape of the groove is such that the radius of curvature d of the entrance corner of the groove, the groove depth H, and the circumscribed circle diameter D of the fiber cross section satisfy the following formulas (1) and (2). d/D ⁇ 0.030...Formula (1) 0.10 ⁇ (H/D) ⁇ 0.30...Formula (2)
  • the surface form that allows the fabric to exhibit water repellency as a woven or knitted fabric and the prevention of shedding of the water repellent agent make it possible to exhibit excellent water repellency and durability even under harsh usage environments. can.
  • the ratio of the radius of curvature d of the entrance corner of the groove to the diameter D of the circumscribed circle of the fiber cross section (hereinafter referred to as d/D) is 0.030 or less.
  • the entrance corner of the groove is an acute-angled portion near the entrance of the groove in the fiber cross section of the polyamide irregular cross-section fiber (see FIG. 2).
  • the circumscribed circle diameter D of the fiber cross section is the circumscribed circle diameter of the fiber cross section of the polyamide irregular cross section fiber (D in FIG. 1(a)).
  • d/D By setting d/D to 0.030 or less, when water droplets come into contact with the fibers, it is difficult for water droplets to enter the grooves, and furthermore, the air taken in acts to push up the water droplets, making it possible to maintain an air layer. , can maintain water repellency. When d/D exceeds 0.030, water droplets easily enter the grooves and structural water repellency cannot be exhibited.
  • d/D is 0.025 or less. More preferably, d/D is 0.022 or less.
  • the ratio of the groove depth H to the circumscribed circle diameter D of the fiber cross section (hereinafter referred to as H/D) is 0.10 or more and 0.30 or less.
  • the groove depth H is the length from the circumscribed circle in the fiber cross section of the polyamide irregular cross-section fiber to the groove bottom surface (H in FIG. 1(a)).
  • H/D is 0.12 or more and less than 0.28. More preferably, H/D is 0.15 or more and less than 0.25.
  • the polyamide irregular cross-section fiber of the present invention has a rigid amorphous content of 35% to 55%.
  • the rigid amorphous amount is the amount of amorphous that can be determined by the method explained in the Examples section, and is an intermediate state between a crystal and a mobile amorphous, in which molecular motion freezes even above the glass transition temperature (Tg). It is an amorphous material that becomes fluid at a temperature higher than Tg. (For example, see Minoru Totoki, “DSC (3) -Glass transition behavior of polymers-”, Journal of the Japan Institute of Fiber Science and Technology, Vol. 65, No.
  • the amount of rigid amorphous is 38 to 52%.
  • the polyamide irregular cross-section fiber of the present invention is made from a composite yarn having a core-sheath cross-sectional shape, in which the core is a polyamide polymer and the sheath is a thermoplastic polymer that dissolves in alkali or hot water. It can be obtained by elution and removal.
  • the cross-sectional shape of the core is the same as that of the polyamide irregular cross-section fiber of the present invention.
  • the sheath component of the core-sheath type composite yarn of the present invention is made of a thermoplastic polymer that dissolves in alkali or hot water, and the core component is made of a polyamide polymer.
  • the higher the elution rate ratio of the core component and sheath component to the solvent (alkali or hot water), the better the combination, and the elution rate ratio is preferably 10 times or more, and the polymer is selected with a range of 3000 times or less as a guide. can do. More preferably, the elution rate ratio is 100 times or more, and still more preferably 1000 times or more.
  • sheath component examples include polyethylene terephthalate and its copolymers, polylactic acid, polyamide copolymers, polystyrene and its copolymers, polyethylene, polyvinyl alcohol, etc., which can be melt-molded and are more easily eluted than the core component. Select from polymers that show: In composite spinning that passes through the same die, the core component polyamide needs to have heat resistance under melt spinning conditions, and the sheath component is preferably polyethylene terephthalate, its copolymer, or polylactic acid.
  • the cross-sectional shape of the core of the core-sheath type composite yarn of the present invention is an irregular cross-section, and by forming a sharp cross-section, high water-repellent performance can be expressed.
  • polyamide with high wear resistance is selected as the core component.
  • Preferred core components include polycaproamide (nylon 6), polyhexamethylene adipamide (nylon 66), polyundecanoamide (nylon 11), polypentamethylene adipamide (nylon 56), and polypentamethylene cepacamide. (nylon 510) and polyhexamethylene sebacamide (nylon 610).
  • the change in elongation before and after dissolving and removing the sheath is: Fiber elongation Ea after dissolving and removing the sheath / Fiber elongation Eb before dissolving and removing the sheath ⁇ 1.30.
  • Ea/Eb By setting Ea/Eb within such a specified range, a woven or knitted fabric with excellent washing color fastness can be obtained. If Ea/Eb exceeds 1.30, the color fastness to washing will be poor.
  • Ea/Eb is 1.10 or less.
  • the change in strength before and after dissolving and removing the sheath is as follows: Fiber strength Sa after dissolving and removing the sheath/Fiber strength Sb before dissolving and removing the sheath ⁇ It is 0.95.
  • Sa/Sb Fiber strength
  • a woven or knitted fabric can be produced that is resistant to tearing and abrasion and has practical durability.
  • Sa/Sb is less than 0.95, the fiber strength is insufficient and tends to tear easily, resulting in poor practical durability.
  • Sa/Sb is 1.00 or more.
  • the polyamide irregular cross-section fiber of the present invention is produced by manufacturing a fiber consisting of a core-sheath type composite yarn having a polyamide polymer as a core component with an irregular cross-sectional shape and a thermoplastic polymer soluble in alkali or hot water as a sheath component, and then performing high-order processing. It can be obtained by eluting and removing the sheath component during the process.
  • FIG. 3 shows an embodiment of a manufacturing apparatus preferably used in a method for manufacturing fibers made of core-sheath type composite yarns.
  • a method for spinning fibers made of the core-sheath type composite yarn of the present invention composite spinning by melt spinning is suitable from the viewpoint of increasing productivity. It is also possible to obtain fibers made of core-sheath type composite yarns by solution spinning or the like.
  • each filament discharged from the composite spinneret 1 is cooled to room temperature by a gas supply device 2 that blows out steam to prevent staining of the spinneret over time, and a cooling device 3. Cool until solidified. Thereafter, a lubricant is applied by an oil supply device 4, and each filament is bundled by a fluid nozzle device 5 to form a multifilament, which is stretched by a take-up roller 6 and a stretching roller 7, and then wound up by a winding device 8.
  • the melt viscosity of the polyamide resin chips used is preferably in the range of 300 poise to 2000 poise. The measurement method will be explained in the Examples section below.
  • melt viscosity of the polyamide resin chip is 1800 poise or less, the extrusion pressure of the molten polymer during spinning and its rate of increase over time can be suppressed, and excessive load on production equipment and the replacement cycle of the spinnerets can be suppressed. It is more preferable because it can extend the period of time and ensure productivity.
  • melt viscosity of the easily dissolvable thermoplastic polymer resin chips used is preferably in the range of 300 poise to 1500 poise. The measurement method will be explained in the Examples section below.
  • the above-mentioned rigid amorphous amount, elongation change Ea/Eb, and strength change Sa/Sb can be achieved.
  • the polyamide modified cross-section fiber and core-sheath type composite yarn of the present invention it is important to control the orientation of each polymer component before drawing in order to achieve the desired rigid amorphous content. be.
  • the difference in melting point between the core component and the sheath component is 50° C. or less.
  • the melting temperature is 20°C higher than the respective melting points (Tm) of the polyamide and the easily dissolvable polymer (Tm + 20°C) or higher; Moreover, it is preferable to melt at a temperature that is 95° C. higher than Tm (Tm+95° C.) or lower. By setting it within such a specified range, the melt viscosity becomes suitable for melt spinning, so stable yarn spinning becomes possible.
  • the ratio of the core component and sheath component when spinning the core-sheath type composite yarn is the core/sheath ratio based on the discharge amount.
  • the ratio can be selected within the range of 50/50 to 90/10.
  • increasing the core ratio is preferable from the viewpoint of productivity of the core-sheath type composite yarn.
  • the core/sheath ratio is more preferably 70/30 to 90/10, as long-term stability of the core-sheath type cross-section and the irregular-shaped cross-section can be manufactured efficiently and in a well-balanced manner while maintaining stability.
  • the polyamide irregular cross-section fiber of the present invention in order to achieve the desired rigidity and amorphous content, it is necessary to control the orientation of the polyamide core before drawing when spinning fibers made of core-sheath type composite yarns. It is important to. That is, the spinning conditions of the spinning draft and cooling should be optimized.
  • the spinning draft of the spinning conditions is the ratio of the take-up roller speed to the discharge linear speed (hereinafter referred to as draft ratio), and is preferably controlled to 75 to 300.
  • draft ratio the ratio of the take-up roller speed to the discharge linear speed
  • the higher the draft ratio the easier the orientation of the polyamide progresses, but from the viewpoint of spinning properties, yarn breakage increases and productivity is significantly reduced, so the draft ratio is preferably 300 or less.
  • the orientation of the polyamide advances and the desired rigid amorphous content can be achieved, and the difference in orientation between the polymers of the core and sheath components can be suppressed, and the elongation change Ea/Eb and the strength change Sa/Sb can be suppressed. Can be made smaller.
  • the solidification point of the discharged polymer entering the cooling zone is brought as close to the upper end of the cooling zone as possible. It is preferable that the vertical distance LS (hereinafter referred to as cooling start distance LS) from the lower surface of the spinneret to the upper end of the cooling air blowing part of the cooling device 3 is 30 mm to 120 mm.
  • the cooling start distance LS By setting the cooling start distance LS to 120 mm or less, the solidification point is increased to promote orientation during spinning, increasing rigid amorphism, and reducing the difference in solidification point between the core component and sheath component polymers to reduce the orientation difference. By making it small, the elongation change Ea/Eb and the strength change Sa/Sb can be suppressed. Further, by quickly solidifying the fiber cross section formed using a composite spinneret, a desired irregular cross section can be obtained.
  • the cooling start distance LS is 30 mm or more, it is possible to moderate the orientation during spinning, promote oriented crystallization during drawing, and exhibit strength.
  • the cooling air velocity is preferably 50 m/min or less.
  • the temperature of the cooling air in the cooling region is also an important factor in heat exchange, and the temperature of the cooling air is preferably 20° C. or less.
  • the temperature of the cooling air is preferably 20° C. or less.
  • the polyamide irregular cross-section fiber of the present invention is a woven or knitted fabric having at least a portion of the fiber made of the above-mentioned core-sheath type composite yarn, and a thermoplastic polymer which is dissolved in alkali or hot water as a sheath component. By elution and removal, it is possible to obtain a woven or knitted fabric having at least a portion of polyamide fibers with irregular cross-sections.
  • Elution and removal of sheath components refers to elution and removal of 99% or more of the sheath components using alkali or hot water as a solvent.
  • the alkali concentration and temperature in elution and removal can be set arbitrarily, but for example, in the case of sodium hydroxide, it is possible to treat with a 1.0% to 8.0% by weight aqueous solution at 80°C to 100°C. preferable.
  • melt viscosity The melt viscosity (poise) of the resin chip sample was measured using a capillary flow tester under the conditions of pore diameter 1.0 mm, pore length 10.00 mm, melting temperature 290° C., and shear rate 1216 sec ⁇ 1 .
  • the rigid amorphous amount of the fiber sample was measured using a differential scanning calorimeter Q1000 manufactured by TA Instruments as a measuring instrument.
  • ⁇ Hm0 is the heat of fusion of polyamide (perfect crystal).
  • ⁇ Cp0 is the difference in specific heat before and after the glass transition temperature (Tg) of polyamide (completely amorphous).
  • Crystallinity Xc and mobile amorphous amount Xma were determined based on the following equations.
  • the rigid amorphous amount Xra was calculated from Xc and Xma.
  • the amount of rigid amorphous crystals was calculated from the average value of two measurements.
  • an embedding agent such as epoxy resin and section it with a microtome to create a fiber cross section.
  • the obtained fiber cross section is observed with a transmission microscope at a magnification that allows observation of one single fiber, and three fibers are randomly selected and the fiber cross section is photographed.
  • d of one single yarn is a value obtained by rounding off the average value of d1, d2, . . . dn to the second decimal place.
  • H and D of one single yarn are values obtained by rounding off the average value of the measured values to the second decimal place.
  • Elongation change Ea/Eb, strength change Sa/Sb The fibers made of core-sheath type composite yarns collected under each spinning condition of Examples and Comparative Examples were set in a 1.125 m/circummeter measuring device, rotated 10 times, taken out from the skein, and filled with a solvent that dissolves the sheath components. After removing 99% or more of the sheath component in the elution bath (bath ratio 100), the elongation and strength were measured as in Section E above. The value obtained by dividing the strength Sa or elongation Ea after elution by the strength Sb or elongation Eb before elution was defined as elongation change Ea/Eb and strength change Sa/Sb.
  • the sheath component was removed by immersing it in a 6.0% by weight aqueous sodium hydroxide solution heated to 95° C. for 30 minutes.
  • Fabric evaluation (a) Water-repellent performance Example 1 Fabric samples were prepared by cutting out 10 pieces of fabric produced using the same manufacturing method to a sample size of 20 cm x 20 cm. For each sample, draw a circle with a diameter of 11.2 cm in the center, stretch it so that the area of the circle is expanded by 80%, attach it to a test piece holding frame used for water repellency test (JIS L1092), and perform a spray test. (JIS L1092 (2020) "Waterproofness Testing Method for Textile Products”), the grade was determined, and the average value of the grade determination results of 10 samples was taken as the water repellent performance. S: 4th grade or above A: 3rd grade or above B: Less than 3rd grade C: 2nd grade or below 3rd grade or above was considered a pass.
  • Example 1 As a core component polyamide polymer, a nylon 6 (N6) chip having a melt viscosity of 1500 poise, a melting point of 225° C., and containing no titanium oxide was dried in a conventional manner to a moisture content of 0.03% by mass or less.
  • thermoplastic polymer for the sheath component a polyethylene terephthalate (PET) chip with a melt viscosity of 850 poise, a melting point of 260° C., and containing no titanium oxide was dried in a conventional manner to a moisture content of 0.015% by mass or less.
  • PET polyethylene terephthalate
  • N6 chips and PET chips were melted separately at 290°C, the core:sheath weight ratio was 80:20, and the cross section shown in Figure 1(b) was obtained using a composite spinneret (pore diameter 0.22 mm, 72 holes). (discharge amount 44.4 g/min).
  • the fibers were spun using a composite spinning machine of the embodiment shown in FIG.
  • Each filament discharged from the composite spinneret 1 is passed through an annular cooling device 3 that blows out cooling rectified air at a cooling start distance LS of 100 mm, a cooling air temperature of 18° C., and a cooling air speed of 35 m/min to bring the yarn to room temperature. Cooled and solidified.
  • a lubricant was applied at a lubricating position Lg of 1000 mm from the bottom surface of the spinneret, and each filament was converged to form a multifilament, and the fluid nozzle device 5 imparted convergence. Convergence was imparted by injecting high-pressure air onto the running yarn within the fluid nozzle device 5.
  • the draft ratio is set to 100, and the fiber is drawn at a draw ratio of 2.2 times between the take-up roller 6 and the drawing roller 7, and is wound up by the winding device 8 to obtain a fiber consisting of a core-sheath type composite yarn of 66 dtex and 36 filaments. Obtained.
  • the fibers made of the obtained core-sheath type composite yarn were used for the warp and weft, and were woven in a plain weave with a warp density of 188 threads/2.54 cm and a weft density of 155 threads/2.54 cm.
  • the obtained gray fabric was dyed and water-repellent treated under the following conditions (a) to (g) to obtain a woven fabric with a warp density of 200 threads/2.54 cm and a weft density of 160 threads/2.54 cm.
  • Table 1 shows the results of evaluating the fabrics using the obtained polyamide irregular cross-section fibers.
  • Example 2 [Comparative example 1] [Comparative example 4] A fiber consisting of a core-sheath type composite yarn of 66 dtex and 36 filaments was obtained in the same manner as in Example 1, except that the draft ratio of the spinning conditions was changed as shown in Table 1 and the amount of rigid amorphous was changed, and a woven fabric was obtained. I got it. The evaluation results are shown in Table 1.
  • Example 3 A fiber consisting of a core-sheath type composite yarn of 66 dtex and 36 filaments was obtained in the same manner as in Example 1, except that the cooling air velocity was changed as shown in Table 2 and the fiber properties including the rigid amorphous content were changed. , obtained the fabric. The evaluation results are shown in Table 2.
  • Example 4 A fiber consisting of a core-sheath type composite yarn of 66 dtex and 36 filaments was produced in the same manner as in Example 1, except that the cooling start distance LS was changed as shown in Table 2 and the fiber properties including the rigid amorphous content were changed. The fabric was obtained. The evaluation results are shown in Table 2.
  • Example 5 Except that the thermoplastic polymer of the sheath component was changed to a copolymerized PET chip (melt viscosity 750 poise, melting point 240°C) made by copolymerizing 8.0 mol% of 5-sodium sulfoisophthalic acid and 10% by weight of polyethylene glycol with a molecular weight of 1000.
  • a copolymerized PET chip melt viscosity 750 poise, melting point 240°C
  • fibers consisting of a core-sheath type composite yarn of 66 dtex and 36 filaments were obtained to obtain a woven fabric.
  • the evaluation results are shown in Table 3.
  • Example 6 [Example 7] As shown in Table 3, the core component polyamide polymer was changed to N66 chips (melt viscosity 550 poise, melting point 265 °C) and N610 chips (melt viscosity 570 poise, melting point 225 °C), the discharge rate was 48.4 g/min, and the stretching ratio was changed to A fiber consisting of a core-sheath type composite yarn of 66 dtex and 36 filaments was obtained in the same manner as in Example 1 except that the fiber was changed to 2.4 times, and a woven fabric was obtained. The evaluation results are shown in Table 3.
  • the core component polyamide polymer has a melt viscosity of 1200 poise, the melting point 225°C, and an N6 chip that does not contain titanium oxide.
  • the sheath component thermoplastic polymer includes 8.0 mol% of 5-sodium sulfoisophthalic acid and polyethylene glycol 10 with a molecular weight of 1000.
  • a copolymerized PET chip (melt viscosity 450 poise, melting point 240°C) was prepared by copolymerizing PET chips (melt viscosity 450 poise, melting point 240°C), and separately melted at 270°C, with a core:sheath weight ratio of 8:2, and a composite spinneret (pore diameter 0.3 mm, 24 holes) so as to have the cross section shown in FIG. 1(b) (discharge amount: 29.4 g/min). After the melted and discharged yarn was cooled and solidified, an oil agent was applied thereto and the yarn was wound at a spinning speed of 1200 m/min to obtain an undrawn fiber.

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  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Multicomponent Fibers (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
PCT/JP2023/018709 2022-05-27 2023-05-19 ポリアミド異形断面繊維、および芯鞘型複合糸からなる繊維 WO2023228878A1 (ja)

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JPS61160441A (ja) * 1985-01-09 1986-07-21 帝人株式会社 複合繊維及び仮撚２層構造加工糸の製造法
JPH06235168A (ja) * 1993-02-10 1994-08-23 Toyobo Co Ltd 超異型仮撚加工糸織編物
JPH0835145A (ja) * 1992-12-04 1996-02-06 Toyobo Co Ltd シボ織物及びその製造法
JP2000199122A (ja) * 1999-01-06 2000-07-18 Unitika Ltd 井型断面中空繊維
JP2007262610A (ja) * 2006-03-28 2007-10-11 Teijin Fibers Ltd 混繊糸
JP2013224504A (ja) * 2012-04-23 2013-10-31 Toray Monofilament Co Ltd 複合モノフィラメントおよび布帛
WO2018021011A1 (ja) * 2016-07-26 2018-02-01 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レース編物、ストッキング
JP2019026944A (ja) * 2017-07-26 2019-02-21 東レ株式会社 芯鞘複合繊維
WO2019208427A1 (ja) * 2018-04-25 2019-10-31 東レ株式会社 ポリアミド繊維および織編物、並びに、ポリアミド繊維の製造方法
JP2020105682A (ja) * 2018-12-25 2020-07-09 東レ株式会社 芯鞘複合繊維

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JP3907999B2 (ja) 2001-10-22 2007-04-18 株式会社クラレ 特殊断面繊維
JP6729367B2 (ja) 2015-02-13 2020-07-22 東レ株式会社 芯鞘複合繊維およびスリット繊維ならびにそれら繊維の製造方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61160441A (ja) * 1985-01-09 1986-07-21 帝人株式会社 複合繊維及び仮撚２層構造加工糸の製造法
JPH0835145A (ja) * 1992-12-04 1996-02-06 Toyobo Co Ltd シボ織物及びその製造法
JPH06235168A (ja) * 1993-02-10 1994-08-23 Toyobo Co Ltd 超異型仮撚加工糸織編物
JP2000199122A (ja) * 1999-01-06 2000-07-18 Unitika Ltd 井型断面中空繊維
JP2007262610A (ja) * 2006-03-28 2007-10-11 Teijin Fibers Ltd 混繊糸
JP2013224504A (ja) * 2012-04-23 2013-10-31 Toray Monofilament Co Ltd 複合モノフィラメントおよび布帛
WO2018021011A1 (ja) * 2016-07-26 2018-02-01 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レース編物、ストッキング
JP2019026944A (ja) * 2017-07-26 2019-02-21 東レ株式会社 芯鞘複合繊維
WO2019208427A1 (ja) * 2018-04-25 2019-10-31 東レ株式会社 ポリアミド繊維および織編物、並びに、ポリアミド繊維の製造方法
JP2020105682A (ja) * 2018-12-25 2020-07-09 東レ株式会社 芯鞘複合繊維

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