Yarn, cloth and garment

Abstract

Provided are a yarn, a fabric, and a garment which are capable of effectively generating a surface potential with respect to a fabric and garment having a low elongation. The yarn according to the present invention has a large diameter having a total fineness of 90 dtex or more, and contains potential generating filaments (10) that generate a potential upon receiving energy from the outside.

Description

Technical Field

[0001] The present invention relates to yarn, cloth and clothing. Background Art

[0002] Patent Document 1 discloses a yarn having fibers that generate a surface potential under the action of external energy. Patent Document 1 discloses that the thickness of the yarn is 0.005 to 10 dtex (see claim 3 of Patent Document 1), and Patent Document 2 discloses that the elongation of the cloth is 10% (see claim 1 of Patent Document 2).

[0003] Furthermore, according to the yarn described in Patent Document 1, it is possible to exert desired effects such as antibacterial, electrification, or adsorption by generating a potential defined under predetermined conditions (see paragraph

[0008] of Patent Document 1).

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: International Publication No. 2020 / 241432

[0007] Patent Document 2: Japanese Patent Application Publication No. 2022-056409 Summary of the invention

[0008] Problem that the invention aims to solve

[0009] In recent years, clothes (such as outerwear) that provide a loose feeling have become popular. The clothes themselves are relatively loose, so the elongation of the clothes is required to be low. The cloth described in the above-mentioned patent document 2 has an elongation of 10% and contains yarn containing potential-generating yarns, so it is possible to generate potential according to the elongation. However, in the case where the elongation of the clothes that provide a loose feeling is less than 10%, in order to effectively generate the surface potential, it is impossible to deal with it in the expansion of the existing technology, and it is necessary to deal with it in a new direction.

[0010] Therefore, an object of the present invention is to provide a yarn, a cloth, and a piece of clothing that can effectively generate a surface potential for clothing having a low elongation.

[0011] Solutions for solving problems

[0012] The inventors of the present application focused on the following situation: "yarn containing potential-generating yarn" generates an electric field when receiving energy (such as tension, stress, etc.) from the outside, thereby generating a potential, and utilizing such a potential to achieve an antibacterial effect, for example.

[0013] Here, the yarn of the present invention has a large diameter with a total fineness of 90 dtex or more, and contains potential generating yarns that generate potential by receiving energy from the outside.

[0014] The cloth of the present invention comprises the above-mentioned yarn.

[0015] The clothing of the present invention comprises the above-mentioned cloth.

[0016] Effects of the Invention

[0017] According to the present invention, it is possible to effectively generate a surface potential for a yarn having a low elongation. The effects described in this specification are merely illustrative and not limiting, and there may be additional effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 (A) is a diagram showing the structure of yarn 1s (S yarn), Figure 1 (B) is Figure 1 The cross-sectional view of (A) at line AA, Figure 1 (C) is Figure 1 Cross-sectional view at line BB of (A).

[0019] Figure 2 (A) and Figure 2 (B) is a diagram showing the relationship between the uniaxial stretching direction of polylactic acid, the potential direction, and the deformation of the potential generating yarn 10 .

[0020] Figure 3 (A) is a diagram showing the structure of yarn 1z (Z yarn), Figure 3 (B) is Figure 3 The cross-sectional view of (A) at line AA, Figure 3 (C) is Figure 3 Cross-sectional view at line BB of (A).

[0021] Figure 4 1 is a cross-sectional view schematically showing a cross section of a yarn having a dielectric 100 around a potential generating yarn 10 .

[0022] Figure 5 It is a schematic diagram of a false twist yarn manufacturing device.

[0023] Figure 6 (a) is a schematic diagram of the yarn in a twisted state. Figure 6 (b) is a schematic diagram of the yarn before the interlacing process by the jet device. Figure 6 (c) is a schematic diagram of the yarn after the interlacing process. DETAILED DESCRIPTION

[0024] The yarn, cloth and clothes of the present invention are described below. Although the description will be made with reference to the accompanying drawings as needed, the contents of the drawings are only schematically and illustratively represented for the purpose of understanding the present invention, and the appearance, dimensional ratio, etc. may be different from the appearance, dimensional ratio, etc. of the real object. In addition, unless otherwise specifically stated, the various numerical ranges mentioned in this specification are intended to also include the numerical values ​​of the lower limit and / or upper limit themselves. In other words, if a numerical range such as 1 to 10 is taken as an example, it can be interpreted as a numerical range including the lower limit value "1" and also including the upper limit value "10". In addition, there are also cases where "about" or "about" is attached to various numerical values, and the terms such as "about" and "about" mean that they may include a few percent, such as ±10%, ±5%, ±3%, ±2%, ±1%.

[0025] -Description of the Yarn of the Invention-

[0026] The yarn of the present invention is described. The yarn has a "large diameter with a total fineness of 90 dtex or more" and contains "potential generating filaments 10" (or fibers capable of forming an electric field under the action of surface charges). There is no particular limitation on the number of potential generating filaments 10, and it is preferred that the yarn of the present invention contains only 1, 2 or more and 1000 or less, preferably 10 or more and 800 or less, and more preferably 20 or more and 600 or less potential generating filaments.

[0027] [For the potential generating wire]

[0028] First, the potential generating yarn constituting the yarn of the present invention is described. In the present invention, as described above, "potential generating yarn" basically refers to "a fiber (filament) that can generate electric charge under the action of external energy (for example, tension and / or stress, etc.) to form a potential (specifically, surface potential) and / or an electric field" (hereinafter, sometimes also referred to as "potential generating fiber", "electric field forming yarn", "electric field forming fiber", "charge generating fiber" or "charge generating yarn"). As the potential generating yarn, for example, the charge generating fiber described in Japanese Patent Gazette No. 6428979 is preferably used.

[0029] As "energy from the outside", for example, the following external forces can be listed: force from the outside (hereinafter sometimes also referred to as "external force"), specifically, force that causes the yarn or potential generating wire to deform or strain and / or force applied in the axial direction of the yarn or potential generating wire, more specifically, tension (for example, axial tension of the yarn or potential generating wire) and / or stress or strain force (tensile stress or tensile strain applied to the yarn or potential generating wire) and / or force applied in the transverse direction of the yarn or potential generating wire.

[0030] The potential generating filament preferably contains a material having a piezoelectric effect (polarization phenomenon achieved by external force) or piezoelectricity (the property of generating voltage when mechanical strain is applied or conversely generating mechanical strain when voltage is applied) (hereinafter sometimes also referred to as "piezoelectric material" or "piezoelectric body"). Among them, it is particularly preferred to use fibers containing piezoelectric materials (hereinafter sometimes also referred to as "piezoelectric fibers"). Piezoelectric fibers can form potentials through piezoelectricity, so no power source is required and there is no worry about electric shock. In addition, the life of the piezoelectric material contained in the piezoelectric fiber lasts longer than the antibacterial effect achieved by, for example, drugs. In addition, in such piezoelectric fibers, the possibility of causing allergic reactions is also low.

[0031] The “piezoelectric material” can be used without particular limitation as long as it has a piezoelectric effect or piezoelectricity, and may be an inorganic material such as piezoelectric ceramics or an organic material such as a polymer.

[0032] The “piezoelectric material” (or “piezoelectric fiber”) preferably contains a “piezoelectric polymer.” Examples of the “piezoelectric polymer” include a “piezoelectric polymer having pyroelectricity” and a “piezoelectric polymer not having pyroelectricity.”

[0033] In general, a "piezoelectric polymer having thermoelectricity" refers to a piezoelectric material composed of a polymer material that has thermoelectricity and can generate an electric charge (or potential) on its surface simply by applying a temperature change. Examples of such piezoelectric polymers include polyvinylidene fluoride (PVDF). In particular, a material that can generate an electric charge (or potential) on its surface under the action of the heat energy of the human body is preferred.

[0034] In general, "piezoelectric polymers without pyroelectricity" are composed of polymer materials and refer to piezoelectric polymers other than the above-mentioned "piezoelectric polymers with pyroelectricity". Examples of such piezoelectric polymers include polylactic acid (PLA). As polylactic acid, there are known poly-L-lactic acid (PLLA) formed by polymerization of L-isomer monomers, poly-D-lactic acid (PDLA) formed by polymerization of D-isomer monomers, and the like.

[0035] As an example of a piezoelectric material contained in a potential generating filament, "polylactic acid" can be cited. Polylactic acid (PLA), which can be used as a piezoelectric material, is a chiral polymer with a helical structure in the main chain. If polylactic acid is uniaxially stretched to orient the molecules, it can exhibit piezoelectricity. If heat treatment is further applied to increase the crystallinity, the piezoelectric constant becomes higher. The crystallinity can be increased in this way to increase the value of the surface potential.

[0036] The optical purity (enantiomeric excess (ee)) of polylactic acid (PLA) can be calculated by the following mathematical formula: Optical purity (%) = {|amount of L-isomer - amount of D-isomer| / (amount of L-isomer + amount of D-isomer)}×100

[0037] For example, the optical purity of either the D-body or the L-body is 90% by weight or more, preferably 95% by weight or more, more preferably 98% by weight or more and 100% by weight or less, further preferably 99.0% by weight or more and 100% by weight or less, and particularly preferably 99.0% by weight or more and 99.8% by weight or less. The amount of the L-body and the amount of the D-body of the polylactic acid (PLA) can be obtained by, for example, using a method using high performance liquid chromatography (HPLC).

[0038] The number average molecular weight (Mn) of polylactic acid is, for example, 6.2×10 4 The weight average molecular weight (Mw) is, for example, 1.5×10 5 In addition, the molecular weight is not limited to these values.

[0039] Polylactic acid can generate piezoelectricity through molecular orientation processing achieved by stretching, so it does not need to be polarized like other piezoelectric polymers or piezoelectric ceramics such as polyvinylidene fluoride (PVDF). The piezoelectric constant of polylactic acid after uniaxial stretching is about 5pC / N or more and 30pC / N or less, which is a very high piezoelectric constant among polymers. In addition, the piezoelectric constant of polylactic acid does not change over time and is very stable.

[0040] The potential generating filament is preferably a fiber with a circular cross section. The potential generating filament can be manufactured, for example, by the following methods: a method of extruding a piezoelectric polymer to form a fiber; a method of melt spinning a piezoelectric polymer to form a fiber (for example, including the following methods: spinning, stretching, one-step method of connecting the spinning process and the stretching process, POY-DTY method that can also perform a false twisting process at the same time, or ultra-high-speed spinning method for high speed); a method of forming a piezoelectric polymer into fibers by dry or wet spinning (for example, including the following methods: a phase separation method or dry-wet spinning method that dissolves a polymer as a raw material in a solvent and extrudes it from a nozzle to form a fiber, a gel spinning method that uniformly forms a gel while maintaining a solvent-containing state, or a liquid crystal spinning method that uses a liquid crystal solution or a melt to form a fiber); or a method of electrostatically spinning a piezoelectric polymer to form a fiber. In addition, the cross-sectional shape of the potential generating filament is not limited to a circle. It is preferred to have a cross section such as a circle, an ellipse, a rectangle, or an irregular shape.

[0041] The electric potential generating filament may be a long fiber or a short fiber. The electric potential generating filament preferably has a length (size) of, for example, 0.01 mm or more. The length may be appropriately selected according to the desired use.

[0042] [Regarding the Yarn of the First Embodiment (So-called S Yarn Embodiment)]

[0043] The yarn of the present invention is preferably a yarn obtained by simply plying and twisting a plurality of potential generating yarns (plying yarn or untwisted yarn), but may also be a yarn obtained by applying twisting (twisting yarn or twisted yarn), a yarn obtained by applying crimping (crimped yarn or false twisted yarn), or a yarn obtained by spinning (spun yarn). In addition, the potential generating yarn may be a potential generating yarn having the following structure: a conductor is used as a core wire, an insulator is wound (covered) around the conductor, and a voltage is applied to the conductor to generate charge.

[0044] like Figure 1 As shown in (A), the yarn 1s may be formed by twisting a plurality of potential generating yarns 10. Figure 1 In the form shown in (A), the yarn 1s is a left-handed yarn (hereinafter referred to as "S yarn") formed by twisting the potential generating yarn 10 in a left-handed manner, or it can be a right-handed yarn (hereinafter referred to as "Z yarn") formed by twisting the potential generating yarn 10 in a right-handed manner (for example, refer to Figure 3 In this way, when the yarn is a twisted yarn, it can be either "S yarn" or "Z yarn".

[0045] In the yarn, the interval between the potential generating filaments 10 is about 0 μm or more and about 10 μm or less, and is generally about 5 μm. When the interval between the potential generating filaments 10 is 0 μm, it means that the potential generating filaments are in contact with each other.

[0046] In the yarn, it presents a "large diameter with a total fineness of 90 dtex or more". The "total fineness" referred to in this specification refers to the total fineness of the yarn composed of one or more potential generating yarns 10. In addition, the unit "dtex" refers to the unit of thickness of 1g of yarn under the condition of a length of 10000m. The number of potential generating yarns 10 is set to achieve the total fineness. As long as the total fineness is more than 90 dtex, the number of potential generating yarns 10 can be 1 or more than 2. As an example, it is set to more than 20 and less than 600. In addition, the so-called "large diameter" in this specification refers to a diameter larger than that of ordinary yarns, and more specifically, as mentioned above, refers to a yarn with a diameter with a total fineness of more than 90 dtex.

[0047] In order to explain the yarn in detail, the potential generating yarn 10 includes a piezoelectric material, and a configuration in which the piezoelectric material is “polylactic acid” is taken as an example and explained in detail.

[0048] like Figure 1 As shown in (A), for the potential generating wire 10 containing uniaxially stretched polylactic acid, when the thickness direction is defined as the first axis, the stretching direction 900 is defined as the third axis, and the direction orthogonal to both the first axis and the third axis is defined as the second axis, the piezoelectric strain constant has tensor components d14 and d25.

[0049] Therefore, polylactic acid can generate electric charge (or potential) most efficiently when strain is generated in a direction at 45 degrees with respect to the direction of uniaxial stretching.

[0050] Figure 2 (A) and Figure 2 (B) is a diagram showing the relationship between the uniaxial stretching direction of polylactic acid, the potential direction, and the deformation of the fiber including the potential generating yarn 10 and / or the yarn 1.

[0051] like Figure 2 As shown in (A), if the potential generating filament 10 contracts in the direction of the first diagonal line 910A and stretches in the direction of the second diagonal line 910B orthogonal to the first diagonal line 910A, the potential can be generated in the direction from the back side to the front side of the paper. In other words, the potential generating filament 10 can generate negative charges on the front side of the paper. Figure 2 As shown in (B), the potential generating filament 10 can generate electric charge (or electric potential) even when it is extended in the direction of the first diagonal line 910A and contracted in the direction of the second diagonal line 910B, but the polarity is opposite, and the electric potential can be generated in the direction from the surface of the paper toward the back side. That is, the potential generating filament 10 can generate positive electric charge on the surface side of the paper.

[0052] for Figure 1 As for the yarn 1s shown, in a yarn (multifilament yarn) (S yarn) obtained by twisting a plurality of potential generating yarns 10 containing such polylactic acid (there is no particular limitation on the twisting method), the stretching direction 900 of each potential generating yarn 10 coincides with the axial direction of each potential generating yarn 10. Therefore, the stretching direction 900 of the potential generating yarn 10 is in a state of being inclined to the left relative to the axial direction of the yarn 1. In addition, the angle depends on the number of twisting times.

[0053] When an "external force" such as tension (preferably axial tension) or stress (preferably axial tensile stress) is applied to such a yarn 1s as an S yarn, a negative (-) charge (or potential) can be generated on the surface of the yarn 1s and a positive (+) charge (or potential) can be generated on the inside.

[0054] The yarn 1s can form a potential by utilizing the potential difference generated by the charge. The potential can also leak into the nearby space and form a coupled potential with other parts. In addition, when the potential generated by the yarn 1s is close to an object with a predetermined potential close to it, such as a predetermined potential (including ground potential) such as a human body, a potential can also be generated between the yarn 1 and the object.

[0055] In addition, since the total fineness of yarn 1s is more than 90 dtex, it becomes a relatively thick yarn. Therefore, even if yarn 1s is not easy to stretch, it is still a relatively thick yarn, so it is possible to use the potential generating yarn 10 to generate a surface potential that can inhibit the proliferation of bacteria. Specifically, the surface potential generated by the application of external force is, for example, more than 0.1V, and preferably can be set to more than 1.0V. The surface potential can generate either positive or negative potential. Specifically, in the case of yarn 1s, the initial state with an elongation of 0 is set to 0V, the surface potential during stretching generates a negative potential, the stretched state is set to 0V, and the surface potential during contraction generates a positive potential. Among them, there is no particular limitation on the method for measuring the surface potential, and it can be measured using, for example, a scanning probe microscope.

[0056] In addition, the use of surface potential can not only inhibit the proliferation of bacteria, but also have a direct bactericidal and antiviral effect. It can also be achieved by generating a potential opposite to the potential of bacteria, fungi and other fungi and viruses, so that bacteria and viruses do not approach each other.

[0057] [Regarding the Yarn of the Second Embodiment (So-called Z Yarn Embodiment)]

[0058] exist Figure 3 In the form shown in (A), the yarn 1z is preferably a right-handed yarn (hereinafter referred to as "Z yarn") formed by twisting the potential generating yarn 10 to the right. Among them, the yarn 1z is a Z yarn, so the stretching direction 900 of the potential generating yarn (or piezoelectric fiber) 10 is preferably tilted to the right relative to the axial direction of the yarn 1z. In addition, its angle depends on the number of times the yarn is twisted. In addition, the polarities of the charges (or potentials) generated in the yarn 1s and the yarn 1z are different.

[0059] In the yarn 1z, "the total fineness is 90 dtex or more". The number of potential generating yarns 10 is set to achieve this total fineness. As long as the total fineness is 90 dtex or more, the number of potential generating yarns 10 may be 1 or 2 or more. As an example, it is set to be 20 or more and 600 or less. The elongation of the yarn 1z having such a fineness is preferably less than 10%.

[0060] When an "external force" such as tension (preferably axial tension) or stress (preferably axial tensile stress) is applied to such a yarn 1z serving as a Z yarn, a positive (+) charge (or potential) can be generated on the surface of the yarn 1z and a negative (-) charge (or potential) can be generated on the inside.

[0061] The yarn 1z can also form a potential by utilizing the potential difference generated by the electric charge. The potential can also leak into the nearby space and form a coupled potential with other parts. In addition, when the potential generated by the yarn 1z is close to an object having a predetermined potential close to it, such as a predetermined potential (including ground potential) such as a human body, a potential can also be generated between the yarn 1z and the object.

[0062] The yarn 1s as the S yarn and the yarn 1z as the Z yarn can be understood more deeply by reading Japanese Patent No. 6428979. Japanese Patent No. 6428979 is incorporated in this specification by reference.

[0063] [Regarding the Yarn of the Third Embodiment (the So-called Embodiment of the Yarn Provided with a Dielectric)]

[0064] Furthermore, it is preferred that the yarn has a "dielectric" disposed around the potential generating wire 10. For example, Figure 4 The cross-sectional view schematically shows that the dielectric 100 can be provided around the potential generating filament 10 in this way.

[0065] In the present invention, "dielectric" refers to an object containing a material or substance having "dielectricity" (the property of being electrically polarized (or dielectric polarization or electric polarization) to positive or negative under the action of an electric potential) and can store electric charge on its surface.

[0066] The dielectric 100 preferably exists in the longitudinal axis direction and the circumferential direction of the potential generating wire 10, and may completely cover the potential generating wire or partially cover the potential generating wire. In addition, when the dielectric 100 partially covers the potential generating wire 10, it is preferred that the potential generating wire 10 itself is directly exposed in the uncovered portion.

[0067] Therefore, the dielectric 100 may be provided entirely or partially in the longitudinal axis direction of the potential generating filament 10. In addition, the dielectric 100 may be provided entirely or partially in the circumferential direction of the potential generating filament 10.

[0068] In addition, the thickness of the dielectric 100 may be uniform or non-uniform (for example, see Figure 4 ).

[0069] The dielectric 100 may exist between the plurality of potential generating filaments 10. In this case, there may be a portion where the dielectric 100 does not exist between the plurality of potential generating filaments 10. In addition, air bubbles or cavities may exist in the dielectric 100.

[0070] The dielectric 100 is not particularly limited as long as it contains a material or substance having dielectric properties. As the dielectric 100, dielectric materials (such as oils, antistatic agents, etc.) known to be mainly used as surface treatment agents (or fiber treatment agents) in the fiber industry may be used.

[0071] In the yarn 1, the dielectric 100 preferably contains an oil. As the oil, an oil (yarn oil) that can be used as a surface treatment agent (or fiber treatment agent) used in the manufacture of the potential generating silk 10 (for example, anionic, cationic or nonionic surfactants, etc.) can be used. In addition, an oil that can be used as a surface treatment agent (or fiber treatment agent) used in the process of cloth making (for example, weaving, weaving, etc.) (for example, anionic, cationic or nonionic surfactants, etc.) and an oil that can be used as a surface treatment agent (or fiber treatment agent) used in the finishing process (for example, anionic, cationic or nonionic surfactants, etc.) can also be used. Among them, as representative examples, silk manufacturing process, cloth making process, finishing process, etc. are listed, but they are not limited to these processes. As the oil, it is particularly preferred to use an oil used to reduce the friction of the potential generating silk 10.

[0072] Examples of the oil include the DELION series manufactured by Takemoto Oil & Fats Co., Ltd., the MARPOZOL series and MARPOZIES series manufactured by Matsumoto Oil & Fats Pharmaceutical Co., Ltd., and the PARATEX series manufactured by Maruhiya Oil Chemical Industry Co., Ltd.

[0073] The oil agent may be present along the entire potential generating yarn 10 or may be present in at least a portion thereof. In addition, after the potential generating yarn 10 is processed into the yarn 1, at least a portion or all of the oil agent may be removed from the potential generating yarn 10 by washing.

[0074] Furthermore, the dielectric 100 used to reduce the friction of the potential generating wire 10 may be a surfactant such as a detergent or a softener used in washing.

[0075] Examples of detergents include ATTACK (registered trademark) series manufactured by Kao Corporation, TOP (registered trademark) series manufactured by Lion Corporation, and ARIEL (registered trademark) series manufactured by Procter & Gamble Japan Ltd.

[0076] Examples of the softener include HUMMING (registered trademark) series manufactured by Kao Corporation, SOFLAN (registered trademark) series manufactured by Lion Corporation, and LENOR (registered trademark) series manufactured by Procter & Gamble Japan Ltd.

[0077] The dielectric 100 preferably has conductivity (property of conducting electricity), and in this case, the dielectric 100 preferably contains an antistatic agent. As the antistatic agent, an antistatic agent that can be used as a surface treatment agent (or fiber treatment agent) used in the manufacture of the potential generating yarn 10 can be used. As the antistatic agent, an antistatic agent used to reduce the looseness of the potential generating yarn 10 is particularly preferably used.

[0078] Examples of the antistatic agent include CRPRON series manufactured by Nissin Chemical Laboratories, Inc., and NICEPOLE series and DEATRON series manufactured by Nikka Chemical Co., Ltd.

[0079] The antistatic agent may be present along the entire potential generating yarn 10 or may be present in at least a portion thereof. In addition, after the potential generating yarn 10 is processed into the yarn 1, at least a portion or all of the antistatic agent may be removed from the potential generating yarn 10 by washing.

[0080] In addition, the above-mentioned surface treatment agents (or fiber treatment agents) such as oils and antistatic agents, detergents, softeners, etc. may not exist around the potential generating yarn 10. That is, there is a case where the potential generating yarn 10 or yarn does not contain the above-mentioned surface treatment agents (or fiber treatment agents) such as oils and antistatic agents, detergents, softeners, etc. In this case, the air (or air layer) existing between the potential generating yarns 10 can function as a dielectric. Therefore, in this case, the dielectric contains air.

[0081] For example, a yarn that does not contain the above-mentioned surface treatment agent (or fiber treatment agent), detergent, softener, etc., may be treated by washing or solvent immersion to attach the above-mentioned surface treatment agent (or fiber treatment agent), detergent, softener, etc. to the potential generating yarn 10. In this case, the clean potential generating yarn 10 is exposed. Alternatively, in the present invention, a yarn consisting only of the clean potential generating yarn 10 may be used.

[0082] In addition, in the present invention, it is also possible to use yarn in which the above-mentioned surface treatment agents such as oils, antistatic agents (or fiber treatment agents), detergents, softeners, etc. are partially removed through treatments such as washing and solvent immersion, and the clean potential generating yarn 10 is partially exposed.

[0083] The thickness of the dielectric 100 (or the interval between the potential generating filaments 10) is about 0 μm to about 10 μm, preferably about 0.5 μm to about 10 μm, more preferably about 2.0 μm to about 10 μm, and generally about 5 μm.

[0084] [Regarding the Yarn of the Fourth Embodiment (the Embodiment of the So-called False Twisted Parallel Yarn)]

[0085] As a preferred embodiment, the yarn may be in the form of a false twisted yarn. In this specification, the so-called "false twisted yarn" refers to a yarn obtained by further twisting the yarn in the opposite direction while heating it to release the twist, and the "false twisted yarn" refers to a yarn obtained by doubling a plurality of false twisted yarns to make the wire diameter relatively thick. Moreover, the "false twisted yarn" is preferably a yarn in which the yarn has a loop, a vortex, a coil, etc.

[0086] The yarn of this embodiment is preferably a first false twisted yarn and a second false twisted yarn, wherein the first false twisted yarn is a yarn in which a plurality of potential generating yarns are twisted in one direction and the second false twisted yarn is a yarn in which a plurality of potential generating yarns are twisted in the opposite direction. Specifically, it refers to a form obtained by false twisting the S yarn 1s described in the first embodiment and the Z yarn 1z described in the second embodiment.

[0087] Reference Figure 5 and Figure 6 , the yarn (false twisted doubled yarn) of this embodiment is described. Figure 5 This is a schematic diagram of a false twist yarn manufacturing device. Figure 6 (a) is a schematic diagram of the yarn in a twisted state. Figure 6 (b) is a schematic diagram of the yarn before the interlacing process by the jet device. Figure 6 (c) is a schematic diagram of the yarn after the interlacing process.

[0088] As an explanation of the yarn (false twisted yarn) of this embodiment, a method for manufacturing the yarn is described. First, an S yarn 1s containing potential generating yarns is placed on one side of a false twisted yarn manufacturing device, and a Z yarn 1z containing potential generating yarns is placed on the other side of the false twisted yarn manufacturing device. Each yarn is twisted ( Figure 6 (a)) directly passes through the heater H. Each yarn coming out of the heater H is in a false twist state ( Figure 6 (b)). The false twisted yarns are subjected to air interlacing by the air jet device AJ, thereby obtaining Figure 6The yarn 1 in the form of such a false twisted doubled yarn (c).

[0089] The yarn in the form of false twisted parallel yarn has a total fineness of 90 dtex or more, so it is a relatively thick yarn. Therefore, even if the elongation of the yarn 1 is low, it is still a relatively thick yarn, so the potential generating yarn 10 can generate a surface potential that can inhibit the proliferation of bacteria. Specifically, the surface potential generated by the application of external force is, for example, 0.1V or more, preferably 1.0V or more.

[0090] In addition, the yarn 1 in the form of a false twisted parallel yarn is paralleled by an air jet nozzle, so a bulky crimped yarn can be obtained. In other words, a quasi-spun yarn (Japanese: sponlique yarn) can be obtained that has a spun yarn-like swelling and soft texture due to the presence of the ring-shaped fuzz.

[0091] In addition, when the S yarn and the Z yarn described in the present embodiment are false-twisted and doubling, the torques of the left-handed S yarn and the right-handed Z yarn cancel each other out, and thus the distortion of the knitted fabric can be suppressed in the subsequent dyeing process of the fabric, etc. In addition, false-twisted and doubling is not limited to the form achieved by the S yarn and the Z yarn, and may be a form in which the S yarns are doubling each other or a form in which the Z yarns are doubling each other.

[0092] In the above description, a method for manufacturing the following yarn is described: Figure 1 The seven potential generating yarns 10 shown are twisted to form an S yarn 1s and Figure 3 The Z yarn 1z formed by twisting the 7 potential generating yarns 10 shown is false twisted and doubling, and the number of potential generating yarns 10 is set to 14, and the total fineness is 90 dtex or more, but the number of yarns is not limited to this example. For example, the number of yarns is preferably 2 or more. It is preferably 20 or more. In addition, in order to increase the surface potential generated by the potential generating yarns 10, it is preferred to increase the number of potential generating yarns, but from the perspective of knitted fabrics for clothing, the number of potential generating yarns 10 is preferably set to 600 or less.

[0093] [Other Preferred Embodiments of Yarn]

[0094] In the yarn 1, the potential generating yarn 10 is preferably made of polylactic acid (PLA). The surface potential can be more appropriately controlled by making the potential generating yarn 10 contain a piezoelectric material such as polylactic acid. In addition, polylactic acid is hydrophobic, so it can provide a smooth skin touch, thereby also giving comfort to the knitted fabric structure. In addition, polylactic acid is known as a biodegradable plastic, so it can eventually decompose into CO2 and water, which can reduce the burden on the environment.

[0095] The crystallinity of "polylactic acid" is, for example, 20% or more, preferably 30% or more, more preferably 40% or more, further preferably 50% or more, and particularly preferably 55% or more. The crystallinity can be determined, for example, by measurement methods such as differential scanning calorimetry (DSC), X-ray diffraction (XRD), and wide-angle X-ray diffraction (WAXD). If it is within such a range, the piezoelectricity derived from the polylactic acid crystals becomes higher, and the polarization achieved by the piezoelectricity of the polylactic acid can be more effectively generated. In addition, the following insight was obtained in the present invention that the measured value of the crystallinity measured using WAXD is different from the measured value of the crystallinity measured using DSC by about 1.5 times (DSC measured value / WAXD measured value≈1.5).

[0096] The piezoelectric material of the present invention may also use, in addition to polylactic acid-based polymers, optically active polymers and their derivatives such as polypeptide-based polymers (e.g., poly(γ-benzyl glutarate), poly(γ-methyl glutarate)), cellulose-based polymers (e.g., cellulose acetate, cyanoethyl cellulose), polybutyric acid-based polymers (e.g., poly(β-hydroxybutyric acid)), polypropylene oxide-based polymers, and the like as polymer piezoelectrics.

[0097] In the yarn (potential generating silk) or cloth (clothing) of the present invention, it is preferred that additives such as plasticizers and / or lubricants are not added. It is generally known that there is a tendency that if additives are contained in the yarn or cloth, it is difficult to generate surface potential. Therefore, in order to properly generate surface potential, it is preferred that no additives are contained in the yarn or cloth. In this specification, the so-called "plasticizer" refers to a material used to impart flexibility to the yarn or cloth, and the "lubricant" refers to a material that improves the sliding of the molecules of the piezoelectric yarn. Specifically, it is intended to represent polyethylene glycol, castor oil-based fatty acid esters, polyoxyethylene sorbitan fatty acid esters, polyethylene glycol fatty acid esters, stearic acid amide and / or glycerol fatty acid esters, etc. These materials are not contained in the yarn or cloth of the present invention.

[0098] The yarn (potential generating yarn) or cloth (clothing) of the present invention preferably contains an anti-hydrolysis agent. In particular, it is preferred to contain an anti-hydrolysis agent for polylactic acid (PLA). As an example of an anti-hydrolysis agent, it is preferred to contain carbodiimide. It is more preferred to contain a cyclic carbodiimide. More specifically, it can also be set to the cyclic carbodiimide described in Japanese Patent No. 5475377. According to such a cyclic carbodiimide, the acidic group of the polymer compound can be effectively blocked. In addition, a carboxyl blocking agent can also be used at the same time as the cyclic carbodiimide compound to the extent that the acidic group of the polymer can be effectively blocked. As the carboxyl blocking agent, the reagents described in Japanese Patent Gazette No. 2005-2174 can be exemplified, such as epoxy compounds, oxazoline compounds and / or oxazine compounds.

[0099] The following describes the effect of the anti-hydrolysis agent. In the past, the generally known fibers or threads containing PLA (fibers or threads that do not generate surface potential) will generate acid due to the hydrolysis of PLA, and the acid will act on bacteria to achieve an antibacterial effect. Therefore, if PLA is hydrolyzed, the fiber or thread will deteriorate. However, the antibacterial mechanism of the potential-generating fiber or potential-generating thread of the present invention is different from that of the past. As described above, the antibacterial effect is achieved by generating a surface potential, so there is no need to generate hydrolysis. Moreover, the potential-generating fiber or potential-generating thread of the present invention contains an anti-hydrolysis agent, so it can prevent hydrolysis in the fiber or thread and inhibit the deterioration of the fiber or thread.

[0100] The yarn of the present invention should not be construed as being limited to the above-mentioned form, especially the yarn made of polylactic acid. In addition, the method for producing the yarn of the present invention is not particularly limited, and is not limited to the above-mentioned production method.

[0101] -Description of the cloth and clothing of the present invention-

[0102] The cloth of the present invention contains yarn having a total fineness of 90 dtex or more and a large diameter, and contains a potential generating filament that generates a potential when receiving energy from the outside. In addition, the clothes of the present invention use cloth containing the yarn. The elongation of the cloth becomes a state that is relatively difficult to stretch. In other words. The elongation is preferably less than 10%. The cloth of the present invention includes woven fabrics, knitted fabrics, non-woven fabrics, etc. In addition, in the present invention, the term "grey cloth" is used as the meaning of the raw material for making clothes, but is used synonymously with "cloth".

[0103] Among them, as an example of the fabric, a knitted fabric formed by knitting the above-mentioned yarns will be specifically described. Herein, the "knitted fabric" in this specification refers to a structure having a structure in which a plurality of loops are interconnected, that is, a sheet-like structure having a loop (Japanese: ニット) structure. For example, by making loops of yarn (such as a circular part) and continuously hooking the next loop to this loop to form a surface or texture, the knitted fabric can be knitted. More specifically, it is preferable that the knitted fabric has a texture that can be formed by knitting methods such as weft knitting, warp knitting, circular knitting, tube knitting, or sock knitting. Such knitted fabrics also include tricot warp knitted fabrics, raschel warp knitted fabrics, etc. In addition, sewn products such as cut and sewn products and knitted sewn products are also included in the knitted fabric of the present invention. Also, seamless products such as WHOLEGARMENT are included in the knitted fabric of the present invention (WHOLEGARMENT (registered trademark)). That is to say, it is a concept clearly different from a woven fabric that forms a grey fabric by intersecting warp and weft at right angles.

[0104] As the textures that the knitted fabric of the present invention may include, for example, there can be listed plain stitch texture (also known as plain knitting texture (Japanese: 平編み), knitted (Japanese: メリヤス) texture), elastic plain stitch texture, laid-in plain stitch texture, interlock texture (also known as double rib texture), osage stitch texture (front osage stitch texture, back osage stitch texture), loop float texture (also known as float pattern), honeycomb texture, cross texture (also known as waffle), circular rib (Japanese: フライス) texture, etc., but it is not limited to these. It is preferable that the texture is different on the front and back of the knitted fabric. In addition, "tuck stitch" can also be included in the texture. That is to say, tuck stitch texture can also be used simultaneously. It is preferable that "float" is included in the texture. The knitted fabric can be either a fleece lining or a brushed lining. The skin feel, breathability, stretchability, etc. of the fabric can be changed depending on the texture.

[0105] In the present invention, the texture that is the smallest repeating unit including "loop", (if necessary) "tuck stitch", and / or "float" is called a "complete texture".

[0106] Such a texture can be formed either by using a knitting machine or by hand knitting. When using a knitting machine, there is no particular limitation on its type, and conventionally well-known knitting machines can be used without particular limitation.

[0107] In addition, in the above description, the fabric of the present invention is described as a knitted fabric, and it can also be a fiber product such as a woven fabric, a knitted fabric, a non-woven fabric, or a braid.

[0108] Examples

[0109] Examples 1 to 5 and Comparative Examples 1 to 5 of clothing obtained using fabrics containing the yarn of the present invention were produced.

[0110] -Example 1-

[0111] 144 potential generating yarns each having a yarn fineness of 1.15 dtex were prepared, and the yarn described in the above-mentioned Embodiments 1 to 4 was used to achieve a total fineness of 167 dtex.

[0112] The yarn containing the potential generating yarn and the nylon yarn were used to manufacture a knitted fabric. The knitted fabric was made into a plating plain knit structure using a computerized flat knitting machine manufactured by Shima Seiki Co., Ltd. After the knitted fabric was subjected to a conventional dyeing process, clothing (sweater products) was manufactured using the knitted fabric.

[0113] -Example 2-

[0114] 144 potential generating yarns each having a yarn fineness of 1.15 dtex were prepared, and the yarn described in the above-mentioned Embodiments 1 to 4 was used to achieve a total fineness of 167 dtex.

[0115] The yarn containing the potential generating yarn was used to produce a knitted fabric. The knitted fabric was made into a honeycomb structure using a 28-needle double-sided knitting machine (LPJ25 knitting machine manufactured by Fukuhara Seiki). After the knitted fabric was subjected to a normal dyeing process, clothing (pants products) was produced using the knitted fabric.

[0116] -Example 3-

[0117] 576 potential generating yarns each having a fineness of 0.573 dtex were prepared, and the yarn described in the above-mentioned Embodiments 1 to 4 was used to achieve a total fineness of 330 dtex.

[0118] Knitted fabric was manufactured using the yarn containing the potential generating yarn, nylon yarn and polyester yarn. The knitted fabric was set to a double-sided knitting structure using a 28-needle double-sided knitting machine (LPJ25 knitting machine manufactured by Fukuhara Seiki). After the knitted fabric was subjected to a normal dyeing process, clothing (jersey products) was manufactured using the knitted fabric.

[0119] -Example 4-

[0120] 48 electric potential generating yarns each having a yarn fineness of 2.29 dtex were prepared, and the yarn described in the above-mentioned Embodiments 1 to 4 was used to achieve a total fineness of 110 dtex.

[0121] The yarn containing the potential generating yarn and nylon yarn (number of yarns: 24, total fineness: 78 dtex) were used to manufacture a knitted fabric. The knitted fabric was knitted using a 28-needle warp knitting machine (HKS type knitting machine manufactured by Karl Mayer) and was set to a warp pile flat (Japanese: バックハーフ) structure. After the knitted fabric was subjected to a normal dyeing process, clothing (medical uniform products) was manufactured using the knitted fabric.

[0122] -Example 5-

[0123] Twenty-four electric potential generating yarns each having a yarn fineness of 4.58 dtex were prepared, and the yarn described in the above-mentioned Embodiments 1 to 4 was used to achieve a total fineness of 110 dtex.

[0124] The yarn containing the potential generating yarn and polyester yarn (24 yarns, total fineness 56 dtex) were used to produce a woven fabric. The woven fabric had a plain weave structure. After the woven fabric was subjected to a conventional dyeing process, a garment (jacket product) was produced using the woven fabric.

[0125] -Comparative Example 1-

[0126] 72 potential generating yarns each having a fineness of 1.17 dtex were prepared, achieving a total fineness of 84 dtex. In other words, the fineness of each yarn was about the same as that of Example 1, but the number of yarns was less than that of Example 1, so the total fineness was less than 90 dtex.

[0127] The yarn containing the potential generating yarn and the polyester yarn were used to manufacture a knitted fabric. The knitted fabric was made into a plating plain knit structure using a 22-needle double-sided knitting machine (LPJH type knitting machine manufactured by Fukuhara Seiki). After the knitted fabric was subjected to a normal dyeing process, clothing (hoodie products) was manufactured using the knitted fabric.

[0128] -Comparative Example 2-

[0129] 72 electric potential generating yarns each having a fineness of 1.17 dtex were prepared, and the total fineness was 84 dtex. In other words, the total fineness was less than 90 dtex.

[0130] The yarn containing the potential generating yarn and the polyester yarn were used to manufacture a knitted fabric. The knitted fabric was made into a double-sided knitting structure using a 28-needle double-sided knitting machine (LPJ25 knitting machine manufactured by Fukuhara Seiki). After the knitted fabric was subjected to a normal dyeing process, clothing (sportswear products) was manufactured using the knitted fabric.

[0131] -Comparative Example 3-

[0132] 36 electric potential generating yarns each having a fineness of 1.56 dtex were prepared, and the total fineness was 56 dtex. In other words, the total fineness was less than 90 dtex.

[0133] The yarn containing the potential generating yarn and the polyester yarn were used to manufacture a knitted fabric. The knitted fabric was made into a honeycomb structure using a 22-needle double-sided knitting machine (LPJH type knitting machine manufactured by Fukuhara Seiki). After the knitted fabric was subjected to a normal dyeing process, clothing (jacket products) was manufactured using the knitted fabric.

[0134] -Comparative Example 4-

[0135] 36 electric potential generating yarns each having a fineness of 1.56 dtex were prepared, and the total fineness was 56 dtex. In other words, the total fineness was less than 90 dtex.

[0136] The yarn containing the potential generating yarn and the nylon yarn were used to manufacture a knitted fabric. The knitted fabric was made into a warp pile plain structure using a warp knitting 28-needle knitting machine (HKS type knitting machine manufactured by Karl Mayer). After the knitted fabric was subjected to a conventional dyeing process, clothing (medical uniform products) was manufactured using the knitted fabric.

[0137] -Comparative Example 5-

[0138] 36 electric potential generating yarns each having a fineness of 1.56 dtex were prepared, and the total fineness was 56 dtex. In other words, the total fineness was less than 90 dtex.

[0139] A woven fabric was produced using the yarn containing the potential generating yarn and the polyester yarn. The woven fabric had a plain weave structure. After the woven fabric was subjected to a normal dyeing process, a garment (jacket product) was produced using the woven fabric.

[0140] The elongation evaluation, surface potential evaluation, and antibacterial evaluation were performed on Examples 1 to 5 and Comparative Examples 1 to 5. Specific evaluation contents are described below.

[0141] (Elongation evaluation)

[0142] After wearing the products of the examples and comparative examples, the wearers walked and measured the strain at the parts of the garment that were stretched (e.g., ribs and crotch), and the elongation was determined based on the measurement. The measuring equipment, measuring range, and measuring conditions were as follows.

[0143] Measuring equipment: ARAMIS Adjustable Base 12M

[0144] Measuring range: 1160×940×940mm2

[0145] Measurement conditions: 7Hz, f4.0

[0146] (Surface potential evaluation)

[0147] For the products of the embodiments and comparative examples, the surface potential of the cloth was measured using an electric force microscope (Electric Force Microscope (EFM)) (manufactured by TREK, Model 1100TN). In addition, for the evaluation of the surface potential, a method using a potential measuring device (refer to Japanese Patent Application No. 2021-065673 and Japanese Patent Gazette No. 2022-161847) was adopted, and the potential measuring device has a stretching mechanism capable of stretching the products of the embodiments and comparative examples arranged on a conductive block as a ground electrode in at least one direction. In other words, a method different from the following measurement method described in Patent Document 1 (International Publication No. 2020 / 241432) was adopted: (a) The yarn is stretched a predetermined amount in one axial direction. (b) The fibers are covered with a core material containing conductive fibers. (c) The core material is grounded. (d) The surface potential of the yarn is measured using an electric power microscope.

[0148] (Antibacterial Evaluation)

[0149] The contents of the antibacterial test are as follows.

[0150] (1) The viable cell count of the products of the comparative examples and the examples in the initial state was measured.

[0151] (2) The viable cell counts of the products of Comparative Examples and Examples were measured after they were left to stand for 18 hours.

[0152] (3) The number of viable cells of the products of the comparative examples and the examples which were left to stand for 18 hours was measured after the products were continuously expanded and contracted for 18 hours to generate surface potential.

[0153] That is, the "antimicrobial activity value" of the present invention refers to a value calculated as follows.

[0154] Antibacterial activity value = number of viable bacteria A - number of viable bacteria B

[0155] Viable bacteria count A: Viable bacteria count after 18 hours of standing

[0156] Number of viable bacteria B: The number of viable bacteria after the product is stretched and contracted continuously for 18 hours to generate surface potential

[0157] The viable cell count was evaluated according to the method of JIS L1902 as described in Japanese Patent Nos. 6922546 and 6292368. The viable cell count value represents the logarithmic value of the colony forming unit (Colony Forming Unit) (logarithmic value per 1g of colony).

[0158] The results of the elongation evaluation, surface potential evaluation, and antibacterial evaluation are shown in the following table.

[0159] [Table 1]

[0160]

[0161] [Table 2]

[0162]

[0163] According to the results in Tables 1 and 2, the clothes of Examples 1 to 5 have a surface potential greater than 0.1 V because of the large-diameter yarns with a total fineness of 90 dtex or more. In addition, the antibacterial activity value is 1.5 or more, so the antibacterial property is good.

[0164] In the garments of Examples 1 to 5, the total fineness is 350 dtex or less, and therefore the potential generating yarn can be elongated to a degree that enables the generation of surface potential.

[0165] Furthermore, according to the results of Examples 3 to 5, by setting the number of potential generating yarns to 20 or more, a large-diameter yarn having a total fineness of 90 dtex or more can be achieved, and the desired surface potential can be generated by the yarn.

[0166] In addition, according to the results of Examples 1 and 2, even if the number of potential generating yarns is set to 600 or less, a large-diameter yarn with a total fineness of 90 dtex or more can be achieved, and the desired surface potential can be generated by the yarn.

[0167] On the other hand, the clothes of Comparative Examples 1 to 5 had a total fineness of less than 90 dtex, so the surface potential was less than 0.1 V. Furthermore, the antibacterial activity value was less than 1.5, so the antibacterial property was inferior to that of the clothes of Examples 1 to 5.

[0168] The yarn, cloth, and clothing of the present invention have the following forms.

[0169] <1> A yarn having a large diameter and a total fineness of 90 dtex or more, and including a potential generating yarn that generates a potential by receiving energy from the outside.

[0170] <2> The yarn according to <1>, wherein the total fineness is 350 dtex or less.

[0171] <3> The yarn according to <1> or <2>, wherein the number of the potential generating yarns is 20 or more.

[0172] <4> The yarn according to any one of <1> to <3>, wherein the number of the potential generating yarns is 600 or less.

[0173] <5> The yarn according to any one of <1> to <4>, wherein the potential generating yarn contains a piezoelectric material.

[0174] <6> The yarn according to any one of <1> to <5>, wherein the piezoelectric material contains polylactic acid.

[0175] <7> The yarn according to any one of <1> to <6>, wherein the piezoelectric material does not contain an additive.

[0176] <8> The yarn according to any one of <1> to <7>, wherein the piezoelectric material contains an anti-hydrolysis agent.

[0177] <9> The yarn according to any one of <1> to <8>, wherein the yarn is formed by combining a first false twisted yarn and a second false twisted yarn, the first false twisted yarn is formed by false twisting a yarn in which a plurality of potential generating yarns are twisted in one direction, and the second false twisted yarn is formed by false twisting a yarn in which a plurality of potential generating yarns are twisted in a direction opposite to the one direction.

[0178] <10> The yarn according to any one of <1> to <9>, wherein the yarn generates a surface potential greater than 0.1 V.

[0179] <11> A cloth comprising the yarn according to any one of <1> to <10>.

[0180] <12> The cloth according to <11>, wherein the yarn is knitted to form a knitted fabric.

[0181] <13> The cloth according to <11>, wherein the yarn is woven to form a woven fabric.

[0182] <14> The cloth according to any one of <11> to <13>, wherein the antimicrobial activity value is 1.5 or more.

[0183] <15> The cloth according to any one of <11> to <14>, wherein the elongation is less than 10%.

[0184] <16> A garment comprising the cloth according to any one of <11> to <15>.

[0185] In addition, the embodiments disclosed this time are illustrative in all aspects and are not the basis for restrictive interpretation. Therefore, the protection scope of the present invention is not interpreted only by the above-mentioned embodiments, but is defined based on the records of the claims. In addition, the protection scope of the present invention may include all changes within the meaning and scope equivalent to the claims.

[0186] Industrial Applicability

[0187] The present invention can be used for, for example, yarn, cloth, and clothing that can effectively generate a surface potential even if the elongation is low.

[0188] Description of Reference Numerals

[0189] 1, 1s, 1z, yarn; 10, potential generating wire; 100, dielectric; 900, stretching direction; 910A, first diagonal line; 910B, second diagonal line; H, heater; AJ, jet device.

Claims

1. A yarn, wherein: The yarn has a large diameter with a total fineness of 90 dtex or more, and contains potential generating yarns that generate potential by receiving energy from the outside.

2. The yarn according to claim 1, wherein The total fineness is 350 dtex or less.

3. The yarn according to claim 1 or 2, wherein: The number of the potential generating filaments is 20 or more.

4. The yarn according to any one of claims 1 to 3, wherein The number of the potential generating filaments is 600 or less.

5. The yarn according to any one of claims 1 to 4, wherein The potential generating wire contains a piezoelectric material.

6. The yarn according to claim 5, wherein The piezoelectric material contains polylactic acid.

7. The yarn according to claim 5 or 6, wherein: The piezoelectric material contains no additives.

8. The yarn according to any one of claims 5 to 7, wherein The piezoelectric material contains an anti-hydrolysis agent.

9. The yarn according to any one of claims 1 to 8, wherein The yarn is formed by combining a first false twisted yarn and a second false twisted yarn, wherein the first false twisted yarn is formed by false twisting a yarn in which a plurality of potential generating yarns are twisted in one direction, and the second false twisted yarn is formed by false twisting a yarn in which a plurality of potential generating yarns are twisted in a direction opposite to the one direction.

10. The yarn according to any one of claims 1 to 9, wherein The yarn generates a surface potential greater than 0.1V.

11. A cloth, wherein This cloth comprises the yarn according to any one of claims 1 to 10.

12. The cloth according to claim 11, wherein The yarns are knitted to form a knitted fabric.

13. The cloth according to claim 11, wherein The yarns are weaved to form a woven fabric.

14. The cloth according to any one of claims 11 to 13, wherein The antibacterial activity value is 1.5 or more.

15. The cloth according to any one of claims 11 to 14, wherein The elongation is less than 10%.

16. A garment, wherein This clothing uses the cloth according to any one of claims 11 to 15.

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