US20250084567A1 - Yarn, fabric, and garment - Google Patents

Yarn, fabric, and garment Download PDF

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Publication number
US20250084567A1
US20250084567A1 US18/955,301 US202418955301A US2025084567A1 US 20250084567 A1 US20250084567 A1 US 20250084567A1 US 202418955301 A US202418955301 A US 202418955301A US 2025084567 A1 US2025084567 A1 US 2025084567A1
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United States
Prior art keywords
yarn
potential
generating
fabric
filaments
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US18/955,301
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English (en)
Inventor
Ryosuke Ebina
Kenichiro Takumi
Tsuyoshi Soeda
Masayuki Tsuji
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Murata Manufacturing Co Ltd
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Murata Manufacturing Co Ltd
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Assigned to MURATA MANUFACTURING CO., LTD. reassignment MURATA MANUFACTURING CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SOEDA, TSUYOSHI, EBINA, Ryosuke, TAKUMI, KENICHIRO, TSUJI, MASAYUKI
Publication of US20250084567A1 publication Critical patent/US20250084567A1/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/30—Antimicrobial, e.g. antibacterial
    • 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
    • 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
    • D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
    • 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
    • D02G3/26—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre with characteristics dependent on the amount or direction of twist
    • D02G3/28—Doubled, plied, or cabled threads
    • 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
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/441—Yarns or threads with antistatic, conductive or radiation-shielding properties
    • 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
    • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
    • D02G3/449—Yarns or threads with antibacterial properties
    • 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
    • D03D15/40—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
    • D03D15/47—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 multicomponent, e.g. blended yarns or threads
    • 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
    • D03D15/49—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 textured; curled; crimped
    • 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
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
    • D04B1/16—Other fabrics or articles characterised primarily by the use of particular thread materials synthetic threads
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/14—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes
    • D04B21/16—Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes incorporating synthetic 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]
    • D10B2331/041—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] derived from hydroxy-carboxylic acids, e.g. lactones
    • 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
    • D10B2401/13—Physical properties anti-allergenic or anti-bacterial
    • 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
    • D10B2401/16—Physical properties antistatic; conductive
    • 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
    • D10B2501/00—Wearing apparel

Definitions

  • the present disclosure relates to a yarn, a fabric, and a garment.
  • Patent Document 1 International Publication No. 2020/241432
  • Patent Document 2 Japanese Unexamined Patent Application Publication No. 2022-056409
  • a garment according to the present disclosure includes the above fabric.
  • FIG. 2 (A) and FIG. 2 (B) are diagrams illustrating the relationship between the direction of uniaxial stretching of polylactic acid, the direction of electric potential, and the deformation of a potential-generating filament 10 .
  • FIG. 3 (A) is a diagram illustrating the structure of a yarn 1 z (Z-yarn)
  • FIG. 3 (B) is a cross-sectional view along line A-A in FIG. 3 (A)
  • FIG. 3 (C) is a cross-sectional view along line B-B in FIG. 3 (A) .
  • FIG. 4 is a cross-sectional view schematically illustrating a cross-section of a yarn including a dielectric 100 around potential-generating filaments 10 .
  • FIG. 5 is a schematic view of a combined false-twisted yarn manufacturing device.
  • an example of “energy from the outside” is at least one force from the outside (hereinafter also referred to as “external force”), specifically an external force or forces such as a force that can cause deformation or distortion in the yarn or potential-generating filament and/or a force applied in the direction along the axis of the yarn or potential-generating filament, more specifically tension (e.g., a tensile force in the direction along the axis of the yarn or potential-generating filament) and/or stress or distortion force (tensile stress or tensile strain applied to the yarn or potential-generating filament) and/or a force applied in the transverse direction with respect to the yarn or potential-generating filament.
  • external force specifically an external force or forces such as a force that can cause deformation or distortion in the yarn or potential-generating filament and/or a force applied in the direction along the axis of the yarn or potential-generating filament, more specifically tension (e.g., a tensile force in the direction along the axis of the yarn or potential-generating
  • the potential-generating filament preferably contains, for example, at least one material having piezoelectric effects (the phenomenon of polarization caused by an external force) or piezoelectricity (the ability to generate voltage when mechanical strain is applied or, conversely, generate mechanical strain when voltage is applied) (hereinafter sometimes referred to as “piezoelectric material” or “piezoelectric”).
  • piezoelectric material the material having piezoelectric effects
  • piezoelectricity the ability to generate voltage when mechanical strain is applied or, conversely, generate mechanical strain when voltage is applied
  • piezoelectric material the phenomenon of polarization caused by an external force
  • piezoelectricity the ability to generate voltage when mechanical strain is applied
  • piezoelectric material the ability to generate voltage when mechanical strain is applied or, conversely, generate mechanical strain when voltage is applied
  • piezoelectric material the ability to generate voltage when mechanical strain is applied
  • piezoelectric fibers fibers containing at least one piezoelectric material
  • Piezoelectric fibers which can create electric potential using piezoelectric
  • piezoelectric material any material can be used without specific restrictions, provided that it is a material having piezoelectric effects or piezoelectricity. It may be an inorganic material, such as piezoelectric ceramics, or an organic material, such as a polymer.
  • the “piezoelectric material” preferably includes (or the “piezoelectric fibers” preferably contain) a “piezoelectric polymer.”
  • piezoelectric polymers include “piezoelectric polymers having pyroelectricity” and “piezoelectric polymers having no pyroelectricity.”
  • piezoelectric polymers having pyroelectricity generally refers to piezoelectric materials that are polymer materials having pyroelectricity and capable of generating electric charge (or electric potential) on their surface solely with an applied temperature change.
  • piezoelectric polymers include polyvinylidene fluoride (PVDF).
  • PVDF polyvinylidene fluoride
  • polymers that can generate electric charge (or electric potential) on their surface using thermal energy from a human body are preferred.
  • piezoelectric polymers having no pyroelectricity generally refers to piezoelectric polymers that are polymer materials and that exclude the above “piezoelectric polymers having pyroelectricity.”
  • piezoelectric polymers include polylactic acid (PLA).
  • PLA polylactic acid
  • PLLA poly-L-lactic acid
  • PDLA poly-D-lactic acid
  • polylactic acid An example of a piezoelectric material contained in the potential-generating filament is “polylactic acid.”
  • Polylactic acid (PLA) which can be used as a piezoelectric material, is a chiral polymer having a helically structured backbone. Polylactic acid can exhibit piezoelectricity when its molecules are oriented through uniaxial stretching. When the degree of crystallization is increased by applying heat treatment, furthermore, the piezoelectric constant increases. By increasing the degree of crystallinity in such a manner, the surface potential value can be improved.
  • optical purity (enantiomeric excess (e.e.)) of polylactic acid (PLA) can be calculated using the following equation.
  • the optical purity is 90% by weight or more, preferably 95% by weight or more, more preferably 98% by weight to 100% by weight, even more preferably 99.0% by weight to 100% by weight, particularly preferably 99.0% by weight to 99.8% by weight.
  • the L-form content and D-form content of the polylactic acid (PLA) can be values obtained by, for example, a method using high-performance liquid chromatography (HPLC).
  • the potential-generating filament is preferably a fiber or fibers having a cross-section in a round shape.
  • the potential-generating filament can be produced by, for example, the method of turning a piezoelectric polymer into a fiber by extruding it, the method of turning a piezoelectric polymer into a fiber by melt-spinning it (including, for example, the spinning and stretching method, in which a spinning step and a stretching step are performed separately, the direct stretching method, in which a spinning step and a stretching step are combined together, the POY-DTY method, in which a false-twisting step can also be performed simultaneously, or the ultra-high-speed spinning method, which is intended for acceleration), the method of turning a piezoelectric polymer into a fiber by dry or wet spinning (including, for example, phase separation or dry/wet spinning techniques like turning the raw-material polymer into a fiber by dissolving it in a solvent and extruding the resulting solution through a nozzle, gel spinning techniques like turning the
  • the distance between the potential-generating filaments 10 in the yarn is approximately 0 ⁇ m or more and approximately 10 ⁇ m or less and generally is about 5 ⁇ m. It should be noted that when the distance between potential-generating filaments 10 is 0 ⁇ m, it means that the potential-generating filaments are in contact with each other.
  • the yarn is a large-diameter with a total linear density of 90 dtex or more.
  • total linear density is intended to mean the totaled linear density of a yarn composed of one or multiple potential-generating filaments 10 .
  • the unit of “dtex,” furthermore, is intended to mean the unit of density of a yarn having a length of 10,000 m and weighing 1 g.
  • the number of potential-generating filaments 10 has been set to achieve this total linear density.
  • the total linear density is 90 dtex or more
  • the number of potential-generating filaments 10 may be one or may be two or more.
  • the number of filaments is 20 to 600.
  • “large-diameter” is intended to mean having a larger diameter than ordinary filaments. More specifically, as stated above, it is intended to mean yarn having a diameter which results in greater than 90 dtex in terms of total linear density.
  • potential-generating filaments 10 containing uniaxially stretched polylactic acid have tensor components of d14 and d25 as piezoelectric strain constants when the thickness direction is defined as a first axis, the direction of stretching 900 is defined as a third axis, and the direction perpendicular to both of the first and third axes is defined as a second axis.
  • Polylactic acid therefore, can generate electric charge (or electric potential) most efficiently when strain occurs in the direction at 45 degrees with respect to the direction in which the acid has been uniaxially stretched.
  • FIG. 2 (A) and FIG. 2 (B) are diagrams illustrating the relationship between the direction of uniaxial stretching of polylactic acid, the direction of electric potential, and the deformation of a fiber containing the potential-generating filaments 10 and/or yarn 1 .
  • a potential-generating filament 10 can generate electric potential in the direction from the backside of the page toward the front side when it contracts in the direction along a first diagonal line 910 A and stretches in the direction along a second diagonal line 910 B, which is perpendicular to the first diagonal line 910 A. That is, the potential-generating filament 10 can generate negative charge on the front side of the page.
  • the potential-generating filament 10 can generate electric charge (or electric potential) even when it stretches in the direction along the first diagonal line 910 A and contracts in the direction along the second diagonal line 910 B.
  • the polarity however, is inverted; it can generate electric potential in the direction from the front surface of the page toward the backside. That is, the potential-generating filament 10 can generate positive charge on the front side of the page.
  • the yarn 1 s illustrated in FIG. 1 (A) is a yarn (S-yarn) formed by twisting multiple strands of such potential-generating filaments 10 containing polylactic acid (multifilament yarn) (there is no specific restriction on the twisting method), and the direction of stretching 900 of each potential-generating filament 10 coincides with the direction along the axis of that potential-generating filament 10 .
  • the direction of stretching 900 of the potential-generating filaments 10 therefore, is in a state in which it is tilted to the left with respect to the direction along the axis of the yarn 1 . It should be noted that the angle depends on the twist number.
  • the yarn 1 s can create electric potential using the potential difference that can result from these electric charges. This electric potential can leak into nearby spaces and form coupled potential with other portions.
  • the electric potential that occurs in the yarn 1 s also allows electric potential to be generated between the yarn 1 and an approaching object having a predetermined potential, such as a predetermined potential (including the ground potential) of a human body, when the yarn comes close to the object.
  • the yarn 1 s is a relatively thick yarn because its total linear density is 90 dtex or more. Consequently, the yarn 1 s is a relatively thick yarn even if it is not easily stretchable, and thus can generate, using its potential-generating filaments 10 , a surface potential sufficient for the control of bacterial growth.
  • the surface potential that occurs through the application of an external force can be, for example, 0.1 V or more, preferably 1.0 V or more.
  • the surface potential that is generated can be either a positive or negative potential.
  • the surface potential that occurs when the yarn is stretched assuming that the initial, zero-elongation state is 0 V is a negative potential
  • the surface potential that occurs when the yarn contracts assuming that the stretched state is 0 V is a positive potential.
  • the method for measuring the surface potential for example, it can be measured using a device such as a scanning probe microscope.
  • the yarn may also have direct bactericidal/virucidal action.
  • the action may be one resulting from repelling microbes, such as bacteria and fungi, and viruses by generating an electric potential that is opposite the potential that the microbes and viruses have.
  • tension preferably tension in the axial direction
  • stress preferably tensile stress in the axial direction
  • positive (+) electric charge or electric potential
  • negative ( ⁇ ) electric charge or electric potential
  • the yarn may include a “dielectric” around the potential-generating filaments 10 .
  • a dielectric 100 can be provided around the potential-generating filaments 10 .
  • dielectric refers to an entity containing a material or substance having “dielectric properties” (the ability to undergo polarization (or dielectric polarization or electric polarization) into electrical positivity and negativity under electric potential). On its surface, electric charge can be stored.
  • the dielectric 100 may be present in the direction along the longitudinal axis and the direction along the circumference of the potential-generating filaments 10 and may completely cover or may partially cover the potential-generating filaments. It should be noted that when the dielectric 100 partially covers the potential-generating filaments 10 , the potential-generating filaments 10 themselves may be directly exposed in the portions that are not covered.
  • the dielectric 100 may be provided throughout or may be provided partially in the direction along the longitudinal axis of the potential-generating filaments 10 .
  • the dielectric 100 furthermore, may be provided throughout or may be provided partially in the direction along the circumference of the potential-generating filaments 10 .
  • the dielectric 100 may have a uniform thickness or may have a nonuniform thickness (e.g., see FIG. 4 ).
  • the dielectric 100 may be present between multiple potential-generating filaments 10 . In that case, there may be portions between the multiple potential-generating filaments 10 in which the dielectric 100 is absent. A bubble or cavity, furthermore, may be present inside the dielectric 100 .
  • dielectric 100 there is no specific restriction on the dielectric 100 , provided that it contains a material or substance having dielectric properties.
  • a dielectric material known to be usable as a surface treatment agent (or fiber treatment agent) primarily in the textile industry (e.g., an oiling agent or antistatic agent) may be used as the dielectric 100 .
  • the dielectric 100 of the yarn 1 preferably contains an oiling agent.
  • the oiling agent can be, for example, an oiling agent for use as a surface treatment agent (or fiber treatment agent) that can be used in the production of the potential-generating filaments 10 (an oiling agent for spinning) (e.g., an anionic, cationic, or nonionic surfactant).
  • the oiling agent may be present throughout or may be present at least in part along the potential-generating filaments 10 . After the potential-generating filaments 10 are processed into the yarn 1 , furthermore, at least part or all of the oiling agent may be detached from the potential-generating filaments 10 as a result of laundering.
  • the dielectric 100 used to reduce the friction between the potential-generating filaments 10 may be a surfactant used during laundering, such as a detergent or softener.
  • detergents examples include the Attack® line, manufactured by Kao Corporation, the Top® line, manufactured by Lion Corporation, and the Ariel® line, manufactured by Procter & Gamble Japan K.K.
  • softeners examples include the Humming® line, manufactured by Kao Corporation, the Soflan® line, manufactured by Lion Corporation, and the Lenor® line, manufactured by Procter & Gamble Japan K.K.
  • the dielectric 100 may have electrical conductivity (the ability to conduct electricity).
  • the dielectric 100 preferably contains an antistatic agent.
  • the antistatic agent can be, for example, an antistatic agent for use as a surface treatment agent (or fiber treatment agent) that can be used in the production of the potential-generating filaments 10 . It is preferred that the antistatic agent be an antistatic agent used to reduce the loosening of the potential-generating filaments 10 in particular.
  • antistatic agents examples include the Kapuron line, manufactured by Nissin Kagaku Kenkyusho Co., Ltd., and the Nicepole line and the Deatron line, manufactured by Nicca Chemical Co., Ltd.
  • the antistatic agent may be present throughout or may be present at least in part along the potential-generating filaments 10 . After the potential-generating filaments 10 are processed into the yarn 1 , furthermore, at least part or all of the antistatic agent may be detached from the potential-generating filaments 10 as a result of laundering.
  • the agents described above, including the surface treatment agent (or fiber treatment agent), such as an oiling agent or antistatic agent, detergent, and softener do not need to be present around the potential-generating filaments 10 . That is, the potential-generating filaments 10 or yarn may be free from the agents described above, including the surface treatment agent (or fiber treatment agent), such as an oiling agent or antistatic agent, detergent, and softener, in some cases.
  • the air (or air layer) present between the potential-generating filaments 10 can function as a dielectric. In that case, therefore, the dielectric includes air.
  • a yarn free from the agents described above, including the surface treatment agent (or fiber treatment agent), detergent, and softener may be used through treatment by laundering or solvent immersion of a yarn in which the agents described above, including the surface treatment agent (or fiber treatment agent), such as an oiling agent or antistatic agent, detergent, and softener, adhere around the potential-generating filaments 10 .
  • the agents described above, including the surface treatment agent (or fiber treatment agent), such as an oiling agent or antistatic agent, detergent, and softener adhere around the potential-generating filaments 10 .
  • pure potential-generating filaments 10 are exposed.
  • a yarn consisting solely of pure potential-generating filaments 10 may be used.
  • a yarn may be used from which the agents described above, including the surface treatment agent (or fiber treatment agent), such as an oiling agent or antistatic agent, detergent, and softener, have been partially removed, for example through treatment such as laundering or solvent immersion, and on which pure potential-generating filaments 10 are partially exposed.
  • the surface treatment agent or fiber treatment agent
  • the surface treatment agent such as an oiling agent or antistatic agent, detergent, and softener
  • the thickness of the dielectric 100 (or the distance between the potential-generating filaments 10 ) is approximately 0 ⁇ m or more and approximately 10 ⁇ m or less, preferably approximately 0.5 ⁇ m or more and approximately 10 ⁇ m or less, more preferably approximately 2.0 ⁇ m or more and approximately 10 ⁇ m or less, and generally is about 5 ⁇ m.
  • the yarn may be in the form of a combined false-twisted yarn.
  • false-twisted yarn is intended to mean a yarn that has been twisted under applied heat and then untwisted by applying a twist in the opposite direction
  • combined false-twisted yarn is intended to mean a yarn having a relatively large thread diameter achieved by combining multiple false-twisted yarns.
  • a “combined false-twisted yarn,” furthermore, may be a yarn form in which loops, swirls, coils, etc., have occurred in its filaments.
  • the yarn in this embodiment may be a combined yarn including a first false-twisted yarn, obtained by false-twisting a yarn in which multiple potential-generating filaments are twisted in one direction, and a second false-twisted yarn, obtained by false-twisting a yarn in which multiple potential-generating filaments are twisted to the side opposite the one direction.
  • a form is intended in which a yarn obtained by false-twisting the S-yarn 1 s described in the first embodiment above and a yarn obtained by false-twisting the Z-yarn 1 z described in the second embodiment above have been combined.
  • FIG. 5 is a schematic view of a combined false-twisted yarn manufacturing device
  • FIG. 6 (A) is a schematic view of the yarn in a twisted state
  • FIG. 6 (B) is a schematic view of the yarn in a state before entangling treatment using an air-jet device
  • FIG. 6 (C) is a schematic view of the yarn in a state after the entangling treatment.
  • an S-yarn 1 s containing potential-generating filaments is set on one side of a combined false-twisted yarn manufacturing device, and a Z-yarn 1 z containing potential-generating filaments is set on the other side of the combined false-twisted yarn manufacturing device.
  • Each yarn is passed through a heater H while in a twisted state ( FIG. 6 (A) ).
  • Each yarn that has left the heater H is in a false-twisted state ( FIG. 6 (B) ), in which the yarn has been untwisted.
  • These yarns in a false-twisted state undergo air-entangling treatment using an air-jet device AJ, through which a yarn 1 in the form of a combined false-twisted yarn as in FIG. 6 (C) is obtained.
  • the yarn in the form of a combined false-twisted yarn is a relatively thick yarn because its total linear density is 90 dtex or more. Consequently, the yarn 1 is a relatively thick yarn even if its percentage elongation is low, and thus can generate, using its potential-generating filaments 10 , a surface potential sufficient for the control of bacterial growth.
  • the surface potential that occurs through the application of an external force can be, for example, 0.1 V or more, preferably 1.0 V or more.
  • the yarn 1 in the form of combined false-twisted yarn furthermore, provides a bulky crimped yarn as a result of being combined through an air-jet nozzle.
  • air-textured yarn which imparts volume and a soft texture mimicking spun yarn by virtue of the presence of loop-shaped naps, is obtained.
  • the skewing of knit cloth can be controlled in, for example, a subsequent fabric dyeing process.
  • the combined false-twisted yarn is not limited to the form using an S-yarn and a Z-yarn; it may be in a form in which S-yarns are combined together, or in a form in which Z-yarns are combined together.
  • a method has been described for manufacturing a yarn with a total linear density of 90 dtex or more by turning the S-yarn 1 s illustrated in FIG. 1 (A) , in which seven potential-generating filaments 10 are twisted, and the Z-yarn 1 z illustrated in FIG. 3 , in which seven potential-generating filaments 10 are twisted, into a combined false-twisted yarn to make the number of potential-generating filaments 10 fourteen.
  • the number of filaments is not limited to this example.
  • the number of filaments may be two or more.
  • the number of potential-generating filaments 10 it is, furthermore, preferred to make the number of potential-generating filaments large to increase the surface potential generated by the potential-generating filaments 10 . From the viewpoint of knit cloth for garments, however, it is preferred that the number of potential-generating filaments 10 be 600 or fewer.
  • Twenty-four potential-generating filaments having a linear density per filament of 4.58 dtex were prepared and turned into a yarn as described in Embodiments 1 to 4 above to achieve a total linear density of 110 dtex.
  • the garments in Examples 1 to 5 achieved a surface potential value greater than 0.1 V because the yarn was large-diameter with a total linear density of more than 90 dtex.
  • the antibacterial activity value was greater than 1.5; therefore, results indicating good antibacterial properties were obtained.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Knitting Of Fabric (AREA)
  • Woven Fabrics (AREA)
US18/955,301 2022-05-30 2024-11-21 Yarn, fabric, and garment Pending US20250084567A1 (en)

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JP2022087970A JP2023175500A (ja) 2022-05-30 2022-05-30 糸，布および衣服
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JP3540208B2 (ja) * 1998-08-31 2004-07-07 グンゼ株式会社 圧電材およびその製造法
JP2002266154A (ja) * 2001-03-05 2002-09-18 Nissan Motor Co Ltd 圧電材含有高分子繊維の紡糸装置及びこれを用いた溶融紡糸方法
JP6608958B2 (ja) * 2015-12-25 2019-11-20 三井化学株式会社 圧電基材、圧電織物、圧電編物、圧電デバイス、力センサー、アクチュエータ、及び生体情報取得デバイス
JP6689119B2 (ja) * 2016-04-04 2020-04-28 帝人株式会社 組紐形態を利用した圧電素子およびそれらを用いたデバイス
JP2019179877A (ja) * 2018-03-30 2019-10-17 三井化学株式会社 圧電繊維、圧電繊維構造体、圧電織物、圧電編物、圧電デバイス、力センサー及びアクチュエータ
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