Fabrics and Textiles

Abstract

To provide fiber products such as a fabric having further improved antibacterial property and further improved wearing comfort.SOLUTION: A fabric including a thread containing potential generation filament is provided. The fabric may include a loop of the thread. Value of a parameter X is 1000 or greater and expressed by following formula: X=(A+B)×C×D×E [where A is loop angle of a loop included in the thread when the fabric is stretched by 10%; B is a connection angle of a loop included in the thread when the fabric is stretched by 10%; C is loop count of the thread per 1 cm2 of the fabric; D is force (N) applied to the fabric per basis weight (g / m2); and E is surface potential (V) of the thread]. A fiber product including such a fabric is provided.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to textile products such as fabrics, and more particularly to fabrics that may be constructed from yarns that include electric potential generating filaments, and textile products that include such fabrics. [Background technology]

[0002] 2. Description of the Related Art There have been many proposals for textile products such as fabrics using yarns capable of generating an electric charge when exposed to external energy (for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6521208 [Patent Document 2] International Publication No. WO 2018 / 235965 Summary of the Invention [Problem to be solved by the invention]

[0004] The inventors of the present application realized that there were problems to be overcome in conventional textile products and found it necessary to take measures to address these problems. Specifically, the inventors of the present application found the following problems:

[0005] For example, Patent Document 1 discloses an antibacterial yarn including a core yarn having a functional polymer that generates an electric charge when exposed to external energy, and a sheath yarn that covers at least a part of the core yarn and has higher moisture absorption than the core yarn (see claim 1 of Patent Document 1). Patent Document 1 also discloses an antibacterial fabric that includes such an antibacterial yarn (see Figure 1 of Patent Document 1).

[0006] Patent Document 2 discloses a knitted fabric having a charge generating region knitted with charge generating yarn that generates an electric charge by external energy (see claim 1 of Patent Document 2). Patent Document 2 also discloses textile products such as legwear that include such a knitted fabric (see Figure 1 of Patent Document 2).

[0007] In conventional textile products disclosed in Patent Documents 1 and 2, for example, it has become possible to achieve a certain level of antibacterial properties by using yarn that generates an electric charge when exposed to external energy.

[0008] However, it was found that conventional textile products may not provide sufficient antibacterial properties when applied to areas where bacteria are likely to grow or sources of odor, particularly when applied to the armpit areas of underwear or the soles of socks, etc. In addition, since comfort is sometimes required when wearing clothing such as underwear and socks, there has been a demand for further improvements in comfort when worn as well as antibacterial properties.

[0009] The present invention has been made in view of the above problems. That is, a main object of the present invention is to provide a textile product such as a fabric that exhibits improved antibacterial properties as well as improved wearing comfort. [Means for solving the problem]

[0010] The inventors of the present application attempted to solve the above problems by taking a new approach, rather than simply extending the conventional technology, and as a result, they have invented a textile product such as a cloth that achieves the above-mentioned main object.

[0011] In textile products using yarn that generates electric charge by external energy, electric charge can be generated by applying external force such as tension. Such electric charge can generate an electric field, which can provide antibacterial and other effects in textile products. Therefore, the inventors of the present application paid special attention to the parts of textile products where such external force is concentrated.

[0012] For example, it has been found that external forces such as tension tend to concentrate on the intertwined loops in knitted fabrics that can be used for clothing such as underwear and socks. In addition, such loops in yarns can also provide stretchability to textile products. Therefore, the inventors of the present application have considered that such loops can greatly contribute to the antibacterial properties and wearing comfort of textile products.

[0013] The inventors of the present application have focused particularly on the loop portions of yarns contained in such textile products and conducted further research.

[0014] As a result of intensive research, the inventors of the present application found that there is a certain correlation between the number of loops and the loop angle of the loop portion of the yarn that can be included in the textile product, the force that can be applied to the textile product, the surface potential that can be generated on the yarn, etc. Furthermore, the inventors of the present application found that such correlation can further improve the antibacterial properties and wearing comfort of the textile product.

[0015] In accordance with the present invention, there is provided a fabric comprising a yarn comprising an electric potential generating filament, which may include loops of said yarn, said loops having the following formula: X = (A + B) x C x D x E [In the formula, A represents the loop angle of the loop contained in the yarn when the fabric is stretched by 10%, B represents the connection angle of the loops contained in the yarn when the fabric is stretched by 10%, C is 1 cm of the fabric 2 indicates the number of loops of said yarn per loop, D is the basis weight of the fabric (g / m 2 ) indicates the force (N) applied per E denotes the surface potential of the yarn (V). The fabric has a parameter X having a value of 1000 or more. Hereinafter, the above formula may be referred to as "formula (I)".

[0016] Furthermore, the present invention provides textile products and the like that contain the above-mentioned fabric. Effect of the Invention

[0017] The present invention provides textile products such as fabrics that exhibit improved antibacterial properties as well as improved comfort when worn. Note that the effects described in this specification are merely examples and are not limiting, and additional effects may also be provided. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a schematic diagram showing a portion of a fabric including loops. [Diagram 2] FIG. 2 is a schematic diagram showing a loop. [Diagram 3] FIG. 3 is a schematic diagram showing a part (front surface) of a fabric including loops. [Figure 4] FIG. 4 is a schematic diagram for explaining the loop angle. [Diagram 5] FIG. 5 is a schematic diagram showing a part (reverse surface) of a fabric including loops. [Figure 6] FIG. 6 is a schematic diagram for explaining the connection angle of the loop. [Figure 7] FIG. 7 is a schematic diagram showing another part (reverse surface) of the fabric including loops. [Figure 8] FIG. 8 is a schematic diagram for explaining the loop shown in FIG. [Figure 9] FIG. 9 is a schematic diagram showing a textile product including a first cloth and a second cloth. [Figure 10] FIG. 10 is a schematic diagram showing another textile product including a first fabric and a second fabric. [Figure 11] FIG. 11 is a schematic diagram showing another textile product including a first fabric and a second fabric. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] The present invention relates to a fabric and a textile product. Specifically, the present invention relates to a fabric including a yarn containing an electric potential generating filament (hereinafter referred to as "the fabric of the present disclosure") and a textile product including the fabric of the present disclosure (hereinafter referred to as "the textile product of the present disclosure"). The fabric of the present disclosure is characterized in that the value of "parameter X" described in detail below is "1000 or more".

[0020] [Basic configuration of the fabric of the present disclosure] The fabric of the present disclosure is a sheet-like structure comprising "yarns comprising electric potential-generating filaments" (hereinafter sometimes referred to as "yarns of the present disclosure" or simply "yarns") as described in detail below, or a sheet-like structure that may be composed of the yarns of the present disclosure. In the present disclosure, the term "sheet-like" or "sheet" refers to a shape configured such that two main surfaces are positioned parallel to each other.

[0021] The fabric of the present disclosure may include loops of yarn. In this disclosure, a "loop" generally means a curved portion of a yarn. A portion of the loop may form a loop or the like.

[0022] The fabric of the present disclosure is preferably a knitted fabric, although the fabric of the present disclosure should not be construed as being limited to knitted fabrics.

[0023] In the present disclosure, the term "knitted fabric" refers to a structure having a structure in which a plurality of loops are connected to each other, i.e., a sheet-like structure having a knit structure. For example, a knitted fabric can be knitted by making a loop of yarn (e.g., a loop-shaped portion) and continuously hooking the next loop onto the loop to form a surface or structure. More specifically, the knitted fabric may have a structure that can be formed by a knitting method such as weft knitting, warp knitting, circular knitting, tubular knitting, or sock knitting. Such knitted fabrics also include tricots. In addition, sewn products such as cut and sewn and knit sewn are also included in the knitted fabrics of the present disclosure. Furthermore, non-sewn products such as whole garments are also included in the knitted fabrics of the present disclosure (WHOLEGARMENT (registered trademark)).

[0024] Examples of weaves that may be included in the knitted fabric of the present disclosure include, but are not limited to, jersey (also called flat knit or stockinette knit), bare jersey, plating jersey, smooth (also called interlock), pique (front pique, back pique), knit miss (also called float), honeycomb, thermal (also called waffle), and milling. The weaves may be different on the front and back of the knitted fabric. Also, the weave may include "tucks." In other words, tuck knitting may be used in combination. The weave may include "misses." The knitted fabric may be back pile or back brushed. Depending on the weave, the feel, breathability, stretchability, etc. of the fabric may be further changed.

[0025] In this disclosure, a structure including the minimum repeating units of a "knit", and optionally a "tuck" and / or a "miss" is referred to as a "complete structure".

[0026] Such a structure may be formed by using a knitting machine or by hand knitting. When a knitting machine is used, the type is not particularly limited, and any conventionally known knitting machine can be used without particular limitation.

[0027] (Threads of the present disclosure) The yarns of the present disclosure comprise "electric potential generating filaments" (or fibers capable of generating an electric field or electric potential due to a surface charge, i.e., fibers capable of generating an electric potential), and can generate an electric field by applying an external force, for example, in the axial direction of the yarn, to generate a positive or negative surface potential. Such a surface potential can provide effects such as antibacterial properties.

[0028] It has been known for some time that the growth of bacteria and fungi can be suppressed by an electric field (see, for example, Tetsuaki Tsuchido, Hiroki Koma, Hideaki Matsuoka, and Junichi Koizumi, published by Kodansha: Microorganism Control - Science and Engineering; see also, for example, Koichi Takagi, Application of High Voltage and Plasma Technology to the Agriculture and Food Industry, J.HTSJ, Vol. 51, No. 216). In addition, the electric potential that generates this electric field can cause a current to flow through a current path formed by moisture or a circuit formed by a localized micro discharge phenomenon. It is believed that this current weakens the bacteria and suppresses their growth. The yarn of the present disclosure is provided with an electric potential generating filament that can generate an electric charge by external energy, and therefore generates an electric field between fibers or when it is close to an object having a predetermined electric potential (including ground potential) such as the human body. Alternatively, the yarn of the present disclosure can pass a current between fibers through moisture such as sweat, or when it is close to an object having a predetermined electric potential (including ground potential) such as the human body. Therefore, the yarn of the present disclosure can exert an antibacterial effect for the following reasons, for example. When applied to an object (for example, clothing, footwear, or medical supplies such as masks) that is used in close proximity to an object having a certain electric potential such as the human body, the direct action of the electric field or current generated causes a disruption in the cell membrane of the bacteria or the electron transport system for maintaining the life of the bacteria, resulting in the death or weakening of the bacteria themselves. Furthermore, the oxygen contained in the water may be converted into active oxygen species by the electric field or current, or oxygen radicals may be generated in the cells of the bacteria due to the stress environment caused by the presence of the electric field or current, and the bacteria are killed or weakened by the action of the active oxygen species including these radicals. In addition, the antibacterial effect may be caused by a combination of the above reasons. Furthermore, it is considered that the same effect is also exerted against viruses for the same reasons as above. Therefore, in the present disclosure, the term "antibacterial" also includes the antiviral effect. However, the term "antibacterial" used in the present disclosure is not limited to the above theory alone.

[0029] The yarn of the present disclosure may contain multiple electric potential-generating filaments. There is no particular limit to the number of electric potential-generating filaments that may be contained in the yarn of the present disclosure. For example, the yarn of the present disclosure may contain 2 or more, 2 to 500, preferably 10 to 350, and more preferably about 20 to 200 electric potential-generating filaments.

[0030] In this disclosure, "electric potential generating filament" means "a fiber (filament) that can generate an electric charge using external energy to form an electric field or electric potential, i.e., generate an electric potential" (hereinafter, also referred to as "electric potential generating fiber"). In the present disclosure, "external energy" refers to, for example, an external force (hereinafter sometimes referred to as "external force"), specifically a force that causes deformation or distortion in the fiber, particularly a compressive force and / or a force applied in the axial direction of the fiber, more specifically, an external force such as tension (e.g., a tensile force in the axial direction of the fiber) and / or stress or strain force (tensile stress or tensile strain on the fiber) and / or a force applied in the transverse direction of the fiber. As the electric potential generating filament, for example, the charge generating fiber described in Japanese Patent No. 6428979 may be used.

[0031] There are no particular limitations on the dimensions (length, thickness (diameter), etc.) or shape (cross-sectional shape, etc.) of the electric potential-generating filament. The yarn of the present disclosure having such electric potential-generating filaments may include a plurality of electric potential-generating filaments having different thicknesses. Thus, threads of the present disclosure may or may not have a constant diameter along their length.

[0032] The electric potential-generating filament may be a long fiber or a short fiber. The electric potential-generating filament may have a length (dimension) of, for example, 0.01 mm or more. The length may be appropriately selected depending on the desired application.

[0033] There is no particular limitation on the thickness (diameter) of the potential-generating filament, and it may be the same (or constant) or may not be the same along the length of the potential-generating filament. The potential-generating filament may have a thickness of, for example, 0.001 μm (1 nm) to 1 mm. The thickness may be appropriately selected depending on the desired application.

[0034] There are no particular limitations on the fiber strength of the potential-generating filament, but it may be, for example, 1 cN / dtex or more and 5 cN / dtex or less.

[0035] The elongation of the potential-generating filament is not particularly limited, but may be, for example, 10% or more and 50% or less.

[0036] The shape of the potential-generating filament, particularly its cross-sectional shape, is not particularly limited, and may be, for example, circular, elliptical, rectangular, or irregular in cross section. A circular cross-sectional shape is preferred.

[0037] The potential-generating filament preferably comprises, for example, a material (hereinafter sometimes referred to as "piezoelectric material" or "piezoelectric body") having a piezoelectric effect (or a polarization phenomenon caused by an external force) or piezoelectricity (or the property of generating a voltage when mechanical strain is applied, or conversely, generating mechanical strain when a voltage is applied). Of these, it is particularly preferable to use a fiber (hereinafter sometimes referred to as "piezoelectric fiber") comprising a piezoelectric material. Since piezoelectric fibers can generate an electric field by piezoelectricity, no power source is required and there is no risk of electric shock. The lifespan of the piezoelectric material that may be contained in the piezoelectric fiber may be longer than the antibacterial effect of, for example, a drug, etc. Furthermore, such piezoelectric fibers are less likely to cause allergic reactions.

[0038] A "piezoelectric material" is a material that can generate electric charges by external energy to form an electric field and / or potential, and can be any material that has the above-mentioned piezoelectric effect or piezoelectricity without any particular limitations. It may be an inorganic material such as piezoelectric ceramics, or an organic material such as polymer.

[0039] The "piezoelectric material" (or "piezoelectric fiber") preferably comprises a "piezoelectric polymer." Examples of "piezoelectric polymers" include "polymers having pyroelectric properties" and "polymers not having pyroelectric properties."

[0040] "Pyroelectric polymer" generally means a polymer material that has pyroelectricity and can generate an electric charge (or electric potential) on its surface simply by applying a temperature change. Examples of such polymers include polyvinylidene fluoride (PVDF). In particular, those that can generate an electric charge (or electric potential) on their surface by the thermal energy of the human body are preferred.

[0041] The term "polymers without pyroelectric properties" generally refers to polymers made of polymer materials, excluding the above-mentioned "polymers with pyroelectric properties." Examples of such polymers include polylactic acid (PLA). Known examples of polylactic acid include poly-L-lactic acid (PLLA) in which L-monomers are polymerized, and poly-D-lactic acid (PDLA) in which D-monomers are polymerized.

[0042] As polylactic acid (PLA), for example, a copolymer of L-lactic acid and / or D-lactic acid and a compound copolymerizable with this L-lactic acid and / or D-lactic acid may be used.

[0043] In addition, as polylactic acid (PLA), a mixture of "polylactic acid (a polymer substantially composed of repeating units derived from a monomer selected from the group consisting of L-lactic acid and D-lactic acid)" and "a copolymer of L-lactic acid and / or D-lactic acid and a compound copolymerizable with this L-lactic acid and / or D-lactic acid" may be used.

[0044] In the present disclosure, the above-mentioned polymer containing polylactic acid is referred to as a "polylactic acid-based polymer." In other words, the term "polylactic acid-based polymer" refers to "polylactic acid (a polymer substantially composed of repeating units derived from a monomer selected from the group consisting of L-lactic acid and D-lactic acid)," "a copolymer of L-lactic acid and / or D-lactic acid and a compound copolymerizable with this L-lactic acid and / or D-lactic acid," and mixtures thereof.

[0045] Among the polylactic acid-based polymers, "polylactic acid" is particularly preferred, and it is most preferred to use a homopolymer of L-lactic acid (PLLA) and a homopolymer of D-lactic acid (PDLA).

[0046] The polylactic acid-based polymer may have a crystalline portion, or at least a portion of the polymer may be crystallized. As the polylactic acid-based polymer, it is preferable to use a polylactic acid-based polymer having piezoelectric properties, in other words, a piezoelectric polylactic acid-based polymer, and particularly a piezoelectric polylactic acid.

[0047] Polylactic acid (PLA) is a chiral polymer with a helical structure in the main chain. When polylactic acid is uniaxially stretched and the molecules are oriented, it can exhibit piezoelectricity. The piezoelectric constant can be increased by further increasing the crystallinity through heat treatment. In other words, the "piezoelectric constant" can be increased according to the "crystallinity" (see "Investigation into the mechanism of high piezoelectricity in solid-phase stretched films using polylactic acid", Journal of the Electrostatic Society of Japan, 40,1 (2016) 38-43).

[0048] The piezoelectric constant of polylactic acid (PLA) is, for example, 5 pC / N or more and 30 pC / N or less.

[0049] The optical purity (enantiomeric excess (ee)) of polylactic acid (PLA) can be calculated by the following formula. Optical purity (%) = {|L volume - D volume| / (L volume + D volume)}×100 For example, in both the D- and L-isomers, the optical purity is 90% by weight or more, preferably 95% by weight or more or 97% by weight or more, more preferably 98% by weight or more and 100% by weight or less, even more 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 amounts of L- and D-isomers of polylactic acid (PLA) may be values ​​obtained by, for example, a method using high performance liquid chromatography (HPLC).

[0050] The crystallinity of polylactic acid (PLA) is, for example, 15% or more, preferably 35% or more, more preferably 50% or more, and even more preferably 55% to 100%. The higher the crystallinity, the better, but from the viewpoint of dyeability, it may be, for example, 35% to 50%, preferably 38% to 50%.

[0051] The degree of crystallinity can be determined by a measurement method such as a method using a differential scanning calorimeter (DSC) (e.g., DSC7000X manufactured by Hitachi High-Tech Science Corporation) or an X-ray diffraction method (XRD) (e.g., X-ray diffraction method using ultraX 18 manufactured by Rigaku Corporation).

[0052] There is no particular limitation on the crystal size, and it may be, for example, 5 nm or more and 20 nm or less. There is no particular limitation on the degree of orientation, and it may be, for example, 60% or more and 100% or less.

[0053] In addition to polylactic acid-based polymers, for example, optically active polymers such as polypeptides (e.g., poly(γ-benzyl glutarate), poly(γ-methyl glutarate), etc.), celluloses (e.g., cellulose acetate, cyanoethyl cellulose), polybutyric acids (e.g., poly(β-hydroxybutyric acid), etc.), and polypropylene oxides, and their derivatives may be used as the polymeric piezoelectric material.

[0054] Furthermore, the yarn disclosed herein may be an electric potential generating filament (or charge generating fiber) that has a configuration in which a conductor is used as a core yarn, the conductor is wrapped (covered) with an insulator (or filament or fiber), and a voltage is applied to the conductor to generate an electric charge.

[0055] The yarn of the present disclosure may be a yarn obtained by simply aligning a plurality of electric potential-generating filaments (aligned yarn or non-twisted yarn), or may be in the form of a twisted yarn (twisted yarn or twisted yarn), a crimped yarn (crimped yarn or false twisted yarn), or a spun yarn (spun yarn). There are no particular limitations on the method of aligning, twisting, crimping, spinning, etc. of the yarn, and any method known in the art may be used.

[0056] The yarn of the present disclosure may be a fully oriented yarn (FOY), a partially oriented yarn (POY), a draw textured yarn (DTY), a filament twisted yarn (FTY), or a single yarn, a two-ply yarn, or a spun yarn.

[0057] As the thread of the present disclosure, for example, the threads described in Japanese Patent No. 6428979 and Japanese Patent No. 6521208 may be used. Japanese Patent No. 6428979 and Japanese Patent No. 6521208 are incorporated herein by reference.

[0058] The yarn of the present disclosure may contain other fibers (hereinafter, other fibers other than the above-mentioned "electric potential generating filament" will be referred to as "mixed fibers" for convenience). The type of mixed fiber is not particularly limited, and may be a fiber made of synthetic resin; a natural fiber such as cotton, ramie, linen, kenaf, abaca, sisal, jute, hemp, palm, paper mulberry, mitsumata, bagasse, etc.; or a semi-synthetic fiber (also called a regenerated fiber) such as viscose rayon, Tencel (registered trademark), Lyocell (registered trademark), cupra, or Bemberg (registered trademark). The mixed fiber is preferably a fiber made of synthetic resin. Alternatively, from the viewpoint of texture, the mixed fiber preferably contains natural fibers.

[0059] Examples of fibers made of synthetic resins include single fibers made of polyester resins (polyethylene terephthalate, etc.), single fibers made of polyolefin resins (polyethylene, polypropylene, etc.), single fibers made of polyamide resins (nylon 6, nylon 66, etc.), single fibers of (poly)acrylic made of acrylonitrile, single fibers of engineering plastics (polycarbonate, polyacetal, polystyrene, cyclic polyolefin, etc.), and composite fibers (fibers made by combining different types of resins, or resins made of the same type but different polymer components).

[0060] The yarn of the present disclosure may include yarns comprising other fibers (mixed fibers) as described above, in which case the yarn of the present disclosure may be a two-ply yarn or a spun yarn.

[0061] The threads of the present disclosure may include loops and may be suitably modified or altered as desired within the scope of the present disclosure.

[0062] [Features of the Fabric of the Present Disclosure] The fabric of the present disclosure is characterized in that the value of "parameter X" represented by the following formula (I) is "1000 or more."

[0063] X = (A + B) × C × D × E (I) During the ceremony, A represents the loop angle of the loop that can be included in the yarn when the fabric is stretched by 10%, B represents the connection angle of the loops that can be included in the yarn when the fabric is stretched by 10%, C is 1cm of fabric 2 Indicates the number of loops of yarn per piece, D is the fabric weight (g / m 2 ) indicates the force (N) that can be applied per E denotes the surface potential of the yarn (V).

[0064] To explain the parameter X represented by formula (I), for example, a portion of a fabric including a plurality of loops is shown in Fig. 1. However, the fabric of the present disclosure is not limited to the embodiment shown in the figure.

[0065] FIG. 1 is a schematic diagram showing a typical knitted fabric as an example of the fabric of the present disclosure. The fabric shown in FIG. 1 is formed by connecting or continuing a plurality of loops made of yarn 1 to each other. FIG. 1A shows the "front side" of the fabric, and FIG. 1B shows the "back side" of the fabric. Following the terminology or convention used in the field, the vertical direction along the loops or the up-down direction on the paper surface is referred to as the "wale direction" (D w ) (or loop direction), and the horizontal direction or the left-right direction of the paper is called the "course direction" (D c ) For ease of explanation, the surface shown in FIG. 1A is referred to as the "front side" or "first side" of the fabric, and the surface shown in FIG. 1B is referred to as the "reverse side" or "second side" of the fabric. The terms "front side" and "reverse side" of the fabric are used merely as a formal term for explaining the present invention. The surface shown in FIG. 1B (the "reverse side" or "second side") can also be referred to as the "sinker side" if the fabric is single knit. As shown in Figure 1, the loop pointing upwards on the page can be called a "needle loop."

[0066] Next, multiple loops that may be included in, for example, the yarn 1 shown in Fig. 1 will be described in detail with reference to Fig. 2. Fig. 2 shows an embodiment in which multiple loops 20 that may be included in, for example, the yarn 1 shown in Fig. 1 are arranged consecutively in the course direction, with three loops 20. The loops 20 can be defined by a loop width W and a loop height H.

[0067] There is no particular limitation on the loop width W, and it is, for example, 0.2 mm or more and 2.0 mm or less.

[0068] There is no particular limitation on the loop height H, and it is, for example, 0.2 mm or more and 2.0 mm or less.

[0069] For ease of explanation, the apex area (R n ) and the intermediate region (R m ) and the connection region between the loop and the next loop (R c ) will be explained separately.

[0070] The area including the top (or head) of the loop in the upper part in the wale direction is called the apex area of ​​the needle loop (R n In other words, the apex area of ​​this needle loop (R n ) is the area where the needle passes through the hooped top (or head) of the loop with additional yarn to form the next wale. The area in the lower part in the wale direction, including the bottom (foot) or valley of the loop, is defined as the connecting area (R c In other words, the junction region (R c ) is the area where the bottom (foot) or valley of the loop continues in the course direction or left-right direction of the paper. The apex area of ​​the needle loop (R n ) and the connection region (R c ) is the intermediate region (R m In other words, this intermediate region (R m ) is a region that, in the embodiment shown, mainly includes straight or nearly straight portions of thread 1.

[0071] The vertex area of ​​the needle loop of the loop 20 of the yarn 1 (R n ) is referred to as needle portion 21. In the illustrated embodiment, needle portion 21 can be confirmed on the "reverse side" (second side) of the fabric, for example, by visual inspection or with a magnifying glass or microscope (see Figs. 1B and 5). The connection area (R c ) is referred to as sinker portion 22. In this disclosure, "sinker" is a term meaning "valley." In the illustrated embodiment, sinker portion 22 can be confirmed on the "reverse side" (second side) of the fabric, for example, by visual inspection or with a magnifying glass or microscope (see the crescent- or banana-shaped portion at the bottom of the loop in FIG. 1B and FIG. 5). The middle region (R m ) is referred to as middle portion 23. In the illustrated embodiment, middle portion 23 can be confirmed on the "front surface" (first surface) of the fabric, for example, by visual inspection or with a magnifying glass or microscope (see Figs. 1A and 3).

[0072] In the present disclosure, "stretching" a fabric means pulling or stretching the fabric in any direction (e.g., wale direction and / or course direction relative to the loops, etc.). For example, "stretching" a fabric by 10% means, for example, applying a force to the fabric from a state in which no force is applied to the fabric, and stretching the fabric by 10% in any direction on the length scale. When the fabric includes loops, it is preferable to stretch the fabric in the wale direction. The stretchability of the fabric including loops can be confirmed by stretching the fabric in the wale direction.

[0073] (Component A of parameter X) Component A of parameter X indicates "the loop angle of the loops that can be contained in the yarn when the fabric is stretched by 10%." Note that, when the fabric is a knitted fabric, the loop angle of component A means the average value of the loop angles of the loop portions that exist within one unit of the fabric, for example, within one complete structure of the knitted fabric. For example, as shown in Figures 1, 3 and 5, loop 20 of yarn 1 can be connected in the wale direction (up and down on the page) to other loops, specifically to loops in the next wale (see in particular loop 20 in Figure 3). In component A, "loop angle" means, for example, the rise or pull angle of the loop that may result from such a loop connection. For example, as shown in FIG. 3, the rise of the loop can be mainly confirmed from the "front surface" (first surface) of the fabric containing the loop (see FIG. 3). The rise of the loop can also be confirmed from the "reverse surface" (second surface) of the fabric containing the loop (see FIG. 5). It is preferable to confirm the rise of the loop from the "front surface" (first surface) of the fabric (see FIG. 3). More specifically, as shown in FIG. 4, the “loop angle” is a straight line L along a straight or substantially straight portion that may be included in the intermediate portion 23 between the needle portion 21 and the sinker portion 22 of the loop 20. a and course direction D c (or the left-right direction of the paper) a The angle θ a is an acute angle. Angle θ a The smaller the value of θ, the more likely it is that a circular loop will be formed. a The larger the value of θ, the more likely it is that the loop will rise up and form a long, thin loop. a The value of is a value that can affect the elasticity of the fabric containing the loop. In addition, the angle θ a The value of can have a large influence on the comfort of wearing the fabric containing the loops on the body. Angle θ of component A a is, for example, a value greater than 0° and less than 90°, preferably a value in the range of 5° to 75°. a For example, when the fabric is a knitted fabric, it is preferable that the value be the value when the fabric is stretched by 10% in the wale direction. Angle θ of component A a can be measured, for example, from a photograph, preferably a micrograph, of the "front side" (first surface) of the fabric. Angle θ of component A a is the average value of the loop angle of loops that may be included in one unit of the fabric of the present disclosure (e.g., one complete structure of a knitted fabric).

[0074] (Component B of parameter X) Component B of parameter X indicates the "connection angle of loops that can be included in a yarn when the fabric is stretched by 10%." Note that, when the fabric is a knitted fabric, the loop connection angle of component B means the average connection angle of loops present within one unit of fabric, for example, within one complete structure of the knitted fabric. In component B, the "loop connection angle" refers to the angle of the loop connection part, particularly the sinker part. For example, as shown in Figure 5, the sinker part can be mainly confirmed from the "reverse side" (second side) of the fabric containing the loop (see in particular the crescent-shaped or banana-shaped part at the bottom of the loop on the "reverse side" (second side) shown in Figure 5). The sinker part of the loop can also be confirmed from the "front side" (first side) of the fabric containing the loop (see Figure 3). It is preferable to confirm it from the "reverse side" (second side) of the fabric (see Figure 5). More specifically, as shown in FIG. 6 when the loop is viewed from the “reverse side” (second side), the “loop connection angle” is the straight line L along the sinker portion 22 of the loop 20. b and course direction D c (or the left-right direction of the paper) b Here, a straight line L along the sinker portion 22 of the loop 20 b For example, the straight line (L b ) (see FIG. 6). b is an acute angle. Angle θ b The smaller the value of θ, the more the loop continues in the course direction. b The larger the value of θ, the more the sinker portion 22 of the loop 20 is displaced in the wale direction. bThe value of is a value that can be related to the elasticity of the fabric containing the loop. Also, the angle θ of component B b The value of can have a large influence on the comfort of wearing the fabric containing the loops on the body. Angle θ of component B b is, for example, a value in the range of 0° to 75°, preferably 5° to 60°. b For example, when the fabric is a knitted fabric, it is preferable that the value be the value when the fabric is stretched by 10% in the wale direction. Angle θ of component B b can be measured, for example, from a photograph, preferably a micrograph, of the "reverse" (second) side of the fabric. Angle θ of component B b is the average loop connection angle of loops that may be included in one unit of the fabric of the present disclosure (e.g., one complete structure of a knitted fabric).

[0075] When the fabric is a knitted fabric, for example, as shown in FIG. 7, the connection angle θ of the component B due to tuck knitting, etc. b In such a case, as shown in FIG. 8, a straight line L along a straight line portion or a substantially straight line portion that may be included in the intermediate portion 33 of the loop 30 may become significantly large. c and course direction D c (or the left-right direction of the paper) c The connection angle θ of component B b However, the angle θ c is an acute angle less than 90°. In this case, the angle θ of component B b It is preferable that the angle θ of the loop 30 is 45° or less as a whole, that is, on average. c is the loop angle θ of the above component A a It can also be counted as Angle θ c is the angle θ a and angle θ b can be measured in the same manner.

[0076] The component (A+B) included in parameter X is a component that depends on the angle of the loop, and therefore is a component that can be significantly involved in the stretchability of a fabric containing loops. Furthermore, in relation to the "electric potential generating filament" included in the yarn, it is a component that can be significantly involved in the electrostatic charge when the fabric of the present disclosure is stretched. The value of the component (A+B) is, for example, within a range of 5 to 120. Furthermore, the component (A+B) is a component that can be significantly involved in the comfort of the fabric containing loops when worn on the body.

[0077] (Component C of parameter X) Component C of parameter X is "1 cm of fabric 2 The number of loops of the yarn per cm is shown. The number of loops of component C is the number of loops per cm on the "front side" and "back side" of the fabric. 2 The value with the greater number of winning loops is adopted. The number of loops can be calculated from the CPI and WPI of the fabric. "CPI" refers to the number of courses per inch. The number of courses refers to the number of loops in the course direction (left-right or widthwise). In the fabric of the present disclosure, the CPI is not particularly limited and is, for example, in the range of 10 or more and 150 or less. "WPI" refers to the number of wales per inch. The number of wales refers to the number of loops in the wale direction (vertical or vertical direction). In the fabric of the present disclosure, the WPI is not particularly limited and is, for example, in the range of 10 or more and 100 or less. Alternatively, the number of loops can be determined by counting the heads of the loops in the needle portion of the loop, in which case the number of loops can be determined by visual observation or by counting from a photograph, preferably a micrograph, of the "front side" (first side) or "back side" (second side) of the fabric of the present disclosure. Component C: 1 cm of cloth 2 The "number of yarn loops per unit" is, for example, a value within the range of 100 to 1,500, preferably 100 to 800. Component C is a component that can be significantly involved in the stretchability of the fabric. Furthermore, in relation to the "electric potential generating filament" contained in the yarn, it is a component that can be significantly involved in the electrostatic charge when the fabric of the present disclosure is stretched. In addition, component C is a component that can be significantly involved in the comfort of wearing the fabric containing the loops on the body.

[0078] (Component D of parameter X) The component D of parameter X is the fabric weight (unit: g / m 2 ) (unit: Newton (N)). The value of component D can be determined by measuring the test force (N) of the fabric of the present disclosure, for example, with a universal testing machine. More specifically, a fabric sample (e.g., a sample of six layers of fabric, measurement range: 40 mm) is set in the universal testing machine, and the fabric of the present disclosure is stretched at a constant stretch rate (e.g., 40 mm / min), in a constant direction (e.g., wale direction), and with a constant amplitude (e.g., 6.8 mm) over a constant cycle (e.g., 10 cycles), and the maximum test force (N) applied to the fabric or sample of the present disclosure is measured, and the measured value is expressed as the basis weight (g / m2) of the tested fabric. 2 ) to determine the value of component D. During measurement, an initial load may be applied to the sample (e.g., 0.74 N). The basis weight of the fabric of the present disclosure is not particularly limited, and may be, for example, 10 g / m 2 More than 300g / m 2 The following is the result. The test force (N) to be measured is not particularly limited, and is, for example, 1 N or more and 200 N or less. Component D's "Fabric weight (g / m 2 The value of "force (N) applied per unit of force (N)" is, for example, within the range of 0.01 to 1.2, preferably 0.01 to 1.0. Component D is a component that can be significantly involved in the stretchability of the fabric. Furthermore, in relation to the "electric potential generating filament" contained in the yarn, it is a component that can be significantly involved in the electrostatic charge when the fabric of the present disclosure is stretched. In addition, component D is a component that can be significantly involved in the comfort of wearing the fabric containing the loops on the body.

[0079] (Component E of parameter X) Component E of parameter X indicates the "surface potential of the yarn" (unit: volts (V)). The surface potential (V) of the yarn of component E can be measured, for example, using an electrostatic force microscope (EFM), which is a type of scanning probe microscope. The surface potential of component E means the average value of the surface potential of the yarns constituting the fabric. Specifically, first, a sample for measuring the surface potential is prepared by covering a core material made of conductive fibers with the "yarn containing electric potential generating filaments" contained in the fabric. Next, the core material is grounded. The surface potential of the sample for measuring the surface potential is measured using an electrostatic force microscope (EFM) while the sample is stretched to a predetermined length along one axis (specifically, the longitudinal axis direction of the core material). The average value of the surface potentials of the multiple samples measured in this way is taken as the surface potential (V) of component E. The value of the "yarn surface potential" of component E is, for example, a value in the range of 0.1 V or more. Component E is a component that, in relation to the "electric potential generating filament" contained in the yarn, can be significantly involved in the electrostatic charge when the fabric of the present disclosure is stretched and contracted, and can also be significantly involved in the antibacterial properties exhibited by the fabric.

[0080] (Parameter X) In the fabric of the present disclosure, "parameter X" is a value of "1000 or more." When parameter X is 1000 or more, the fabric of the present disclosure can exhibit antibacterial properties as well as wear comfort.

[0081] The upper limit of the parameter X is, for example, not more than 100000, preferably not more than 50000, and more preferably not more than 40000. When the parameter X is not more than 100000, the fabric of the present disclosure can exhibit antibacterial properties as well as comfortable wearability.

[0082] The parameter X is, for example, a value in the range of 1000 to 100000, preferably 1000 to 50000, and more preferably 1000 to 40000. Within the above range, the fabric of the present disclosure can exhibit better wearing comfort along with antibacterial properties.

[0083] In this disclosure, "antibacterial" means suppressing or inhibiting the development, activity or activity of bacteria and / or viruses, etc., reducing the number of bacteria and / or viruses, etc., or killing or even annihilating bacteria and / or viruses, etc. For example, it is preferable that the "antibacterial activity value" calculated according to the "bacterial liquid absorption method" among the test methods specified in "JIS L 1902" "Antibacterial test method and antibacterial effect of textile products" is "2.2 or more". The bacterial liquid absorption method is the most common method for antibacterial testing of textile products (all textile products including fabrics, threads, clothing materials, bedding, household textiles, etc.), and is the test method for the certification standards of "antibacterial and deodorant processed textile products" and "bacteriostatic processed textile products" of the Japan Textile Evaluation Technology Council (SEK Mark). Here, the antibacterial activity value of "2.2 or more" means antibacterial properties to the extent that the SEK Mark certification for antibacterial and deodorant processing can be obtained. In addition, Staphylococcus aureus, Klebsiella pneumoniae, Pseudomonas aeruginosa, Escherichia coli, Moraxella, MRSA, etc. can be used as the test bacterial liquid.

[0084] "Antimicrobial activity value" may generally be determined according to the following formula: [Antibacterial activity value] = [log (arithmetic mean of viable bacteria count after 18 hours of chamber tensile test)] - [log (arithmetic mean of viable bacteria count after 18 hours of chamber static test)] The "chamber tensile test" and the "chamber static test" will be described in detail in the following Examples. Note that the antibacterial activity value may be calculated using a control cloth sample (standard cotton cloth) as a control.

[0085] In the present disclosure, "wearing comfort" refers to the comfort of the fabric of the present disclosure when applied to or in contact with a part of the human body. More specifically, it refers to the comfort of the fabric of the present disclosure, such as moderate elasticity, breathability that does not cause stuffiness, and a smooth feel.

[0086] For example, a material can be said to exhibit "comfortable wear" when it has suitable elasticity when it comes into contact with human skin, for example, a "stretch rate" based on the "tensile strength test" of "JIS L 1096" described in detail below of 10% or more, or when it has suitable breathability, tactile feel, and other comfort when it comes into contact with human skin.

[0087] More specifically, in a wearing test in which the fabric of the present disclosure is applied to the bodies of 10 subjects (e.g., underarm areas, soles of the feet, etc.) for the elasticity, breathability, feel, etc. of the fabric of the present disclosure, the evaluation criteria are as follows, for example, 1: very comfortable, 2: excellent comfortable, 3: average comfortable, 4: poor comfortable, 5: very poor comfortable, and a fabric is evaluated as exhibiting "wearing comfort" when the average score of the 10 subjects is "2.5 or less."

[0088] (Uses of the fabric of the present disclosure) The fabric of the present disclosure can exhibit both "antibacterial properties" and "comfortable to wear". Therefore, the fabric of the present disclosure can be used without particular restrictions in fields where such antibacterial properties and comfortable to wear are required. For example, it can be used in general cloth products such as clothing. More specifically, the following uses are conceivable.

[0089] For example, these include clothing (e.g., underwear, socks, undergarments, shirts, sportswear, supports, etc.), footwear (e.g., insoles for shoes and boots, etc.), bedding (e.g., futons, mattresses, sheets, pillows, pillowcases, etc.), towels, handkerchiefs, general medical supplies (e.g., bandages, gauze, masks, doctor and patient clothes, etc.), sanitary products, sports equipment (inner gloves or gauntlets used in martial arts, etc.), etc.

[0090] Among clothing, underwear is inevitably stretched and contracted by the wearer's movements, so the fabric of the present disclosure can generate electric charge and / or electric potential at a high frequency. In addition, the underarm area of ​​underwear absorbs moisture such as sweat and becomes a breeding ground for the growth of bacteria, but the fabric of the present disclosure can at least inhibit the growth of bacteria due to the generated electric charge and / or electric potential, so it can be significantly effective as a bacteria countermeasure for deodorization. Furthermore, the fabric of the present disclosure can provide particularly excellent wearing comfort for underwear. In addition, socks necessarily expand and contract along the joints due to movements such as walking, so the fabric of the present disclosure can generate electric charge and / or potential at a high frequency. In addition, socks, especially the sole part, absorb moisture such as sweat and become a breeding ground for the growth of bacteria, but the fabric of the present disclosure can at least inhibit the growth of bacteria, so it can be significantly effective as a bacteria countermeasure for odor prevention. Furthermore, the fabric of the present disclosure can provide particularly excellent wearing comfort in socks. The fabrics of the present disclosure exhibit excellent wearing comfort along with antibacterial properties and can be used in medical supplies such as bandages, gauze, masks, and doctor and / or patient clothing.

[0091] Preferred Embodiments of the Fabric of the Present Disclosure In the fabric of the present disclosure, the value of parameter X is preferably equal to or less than 100000. By having the value of parameter X equal to or less than 100000, the fabric can efficiently generate electric charge and / or potential together with elasticity, and can exhibit comfortable wearability and antibacterial properties suitable for clothing, particularly clothing such as underwear, socks, undergarments, shirts, sportswear, and supports; and medical supplies such as bandages, gauze, masks, and clothes for doctors and / or patients.

[0092] The potential-generating filaments contained in the fabric of the present disclosure preferably comprise a piezoelectric material, which is capable of appropriately generating a surface potential in response to the stretching and contraction of the fabric.

[0093] When the electric potential generating filament contains a piezoelectric material, the piezoelectric material preferably contains polylactic acid, which generates an appropriate surface electric potential in response to the expansion and contraction of the fabric, and due to its hydrophobicity, can provide a smooth feel against the skin and impart comfort to the fabric.

[0094] The fabric of the present disclosure is preferably a knitted fabric. Since the knitted fabric can be composed of a large number of loops, it has excellent elasticity, texture, breathability, etc. Therefore, it can provide suitable antibacterial properties and more suitable wearing comfort.

[0095] The fabric of the present disclosure preferably exhibits antimicrobial properties, more preferably exhibiting an antimicrobial activity value of 2.2 or greater.

[0096] The fabric of the present disclosure is preferably comfortable to wear, and can be used in clothing such as undergarments, socks, underwear, shirts, sportswear, and supports, particularly in areas where bacteria are likely to grow or are sources of odor, particularly the underarm areas of undergarments and shirts, the soles of socks, etc. Furthermore, since the fabric of the present disclosure has antibacterial properties as well as being comfortable to wear, it can also be used in medical supplies such as bandages, gauze, masks, and doctor and / or patient clothing.

[0097] [Textile products of the present disclosure] Furthermore, the present invention relates to a textile product comprising the "fabric of the present disclosure" described above (hereinafter referred to as the "textile product of the present disclosure").

[0098] The textile articles of the present disclosure include a first fabric and, optionally, a second fabric. The first fabric is the "fabric of the present disclosure" described above, i.e., a "fabric including a yarn comprising an electric potential-generating filament", and may include loops of such yarn, and may have the following formula (I): X = (A + B) × C × D × E (I) wherein A, B, C, D and E are as defined above. The fabric has a parameter X value of 1000 or more. The second fabric is a fabric having elasticity as required.

[0099] In other words, the textile product of the present disclosure may include a combination of the fabric of the present disclosure (first fabric) and, if necessary, a fabric having elasticity (second fabric), and may also include a third, fourth, fifth, etc. fabric as necessary.

[0100] The textile products of the present disclosure preferably include at least a first fabric and a second fabric.

[0101] (First cloth) In the present disclosure, the "first fabric" is the "fabric of the present disclosure" described above, and the fabric of the present disclosure can be used in the textile product of the present disclosure without any particular restrictions.

[0102] (Second cloth) The second fabric may be, for example, a woven fabric, a knitted fabric, a nonwoven fabric, etc. The second fabric is not particularly limited as long as it contains fibers. There is no particular limit to the type, shape, thickness, size, etc. of the fibers.

[0103] In the present disclosure, the "second fabric" preferably has "elasticity" as necessary. The "elasticity" of the second fabric means the property of stretching, shrinking, and preferably returning to its original shape. The "elasticity" of the second fabric may be greater than the elasticity of the first fabric, i.e., the fabric of the present disclosure, or may be less than the elasticity of the fabric of the present disclosure.

[0104] An example of an index showing the stretchability of a fabric is the "stretchability rate" based on the "tensile strength test" of "JIS L 1096."

[0105] For example, a stretch rate of 50% means that when a fabric or a sample of fabric is stretched in a certain direction, the dimension will expand by a maximum of 1.5 times. In other words, a stretch rate of 50% means an elongation rate of 150%.

[0106] The second fabric preferably has a stretch rate of 40% or more (or an elongation rate of 140% or more) in the first direction. The first direction may be the warp direction in the case of a woven fabric, or the wale direction of the loops in the case of a knitted fabric. The first direction may also be referred to as the "warp direction." The second fabric preferably has an upper limit of a stretch rate of, for example, 150% or less (or an elongation rate of 250% or less) in the first direction.

[0107] The second fabric preferably has a stretch rate of 40% or more (or an elongation rate of 140% or more) in a second direction perpendicular to the first direction. The second direction may be the weft direction in the case of a woven fabric, or the course direction of the loops in the case of a knitted fabric. The second direction may also be referred to as the "cross direction." The second fabric preferably has an upper limit of a stretch rate of, for example, 100% or less (or an elongation rate of 200% or less) in the second direction.

[0108] A second fabric may be used in combination with a first fabric, and the second fabric may have a higher stretch rate in any direction than the first fabric, or in other words, the first fabric may have a lower stretch rate in any direction than the second fabric.

[0109] The second fabric has a higher stretchability and / or stretch rate than the first fabric, or the first fabric has a lower stretchability and / or stretch rate than the second fabric, so that the textile product of the present disclosure can exhibit additional wear comfort due to the second fabric portion. Since the first fabric is the fabric of the present disclosure and can exhibit the above-mentioned antibacterial properties and wear comfort, the textile product of the present disclosure can exhibit further additional wear comfort due to the second fabric.

[0110] There is no particular limitation on the means for making the second fabric have higher elasticity, particularly the rate of elasticity, than the first fabric. For example, an elastic yarn may be used as a yarn that may be included in the second fabric. In addition, when the second fabric is a woven fabric, the desired elasticity may be achieved by adjusting the interval between the warp and weft yarns or by changing the weaving method. When the second fabric is a knitted fabric, the desired elasticity may be achieved by adjusting the interval between the loops or by changing the knitting method. When the second fabric is a nonwoven fabric, the desired elasticity may be achieved by adjusting the basis weight, fiber length, fiber diameter, etc.

[0111] Alternatively, the first cloth may have a higher stretchability and / or stretch rate than the second cloth in any direction. In other words, the second cloth may have a lower stretchability and / or stretch rate than the first cloth in any direction. By making the stretchability and / or stretch rate of the first cloth higher than that of the second cloth, stress can be more efficiently concentrated in the first cloth when the entire textile product is stretched. As a result, the first cloth can exhibit antibacterial properties more efficiently.

[0112] The second fabric may contain the above-mentioned "yarn comprising electric potential-generating filaments" as a fiber. When the second fabric contains such a yarn, the textile product of the present disclosure can exhibit further antibacterial properties in the second fabric portion in addition to the first fabric portion.

[0113] In the textile products of the present disclosure, the second fabric can be attached to the first fabric, for example, by sewing. The first and second fabrics can also be attached to each other by connecting threads or by weaving or sewing.

[0114] For example, a textile product 100 of the present disclosure is shown diagrammatically in Fig. 9. In the textile product 100, a first cloth 101 and a second cloth 102 are joined to each other, for example, by sewing. The first cloth 101 and the second cloth 102 are preferably joined to form a continuous surface. The second cloth 102 may have a higher stretchability and / or stretch rate than the first cloth 101. In other words, the first cloth 101 may have a lower stretchability and / or stretch rate than the second cloth 102. Such a second cloth 102 can provide additional wearing comfort. Alternatively, the first cloth 101 may have higher elasticity and / or stretch rate than the second cloth 102. In other words, the second cloth 102 may have lower elasticity and / or stretch rate than the first cloth 101. By using such a second cloth 102, stress can be concentrated in the first cloth 101 more efficiently.

[0115] In the present disclosure, there are no particular limitations on the shapes of the first and second fabrics or the number of pieces to be combined.

[0116] For example, FIG. 10 shows a schematic example of a textile product 200 in which one sheet of a first cloth and four sheets of a second cloth are combined. In the embodiment shown in FIG. 10, four pieces of second cloth 202a to 202d are arranged around one piece of first cloth 201 and joined by sewing.

[0117] When the second cloths 202a-202d have higher stretchability and / or stretch rate than the first cloth 201, such second cloths 202a-202d can provide further wearing comfort. In other words, the second cloths 202a-202d are more stretchable than the first cloth 201, and thus can provide better wearing comfort.

[0118] When the first cloth 201 has higher elasticity and / or elasticity than the second cloths 202a to 202d, such second cloths 202a to 202d can more efficiently concentrate stress on the first cloth 201. In other words, by making the first cloth 201 more elastic than the second cloths 202a to 202d, stress can be more efficiently concentrated on the first cloth 201, thereby exhibiting further antibacterial properties.

[0119] FIG. 11 shows a schematic example of a textile product 300 in which a first fabric and a second fabric are bonded to each other by a connecting thread. FIG. 11 shows a schematic diagram of a textile product 300 having a two-layer structure in which a first fabric 301 and a second fabric 302 are bonded to each other by a connecting thread.

[0120] The connecting yarns may be present not only at the edges of the first and second fabrics 301 and 302, but across the entire surfaces to bind the respective surfaces together. There are no particular limitations on the connecting thread, and commercially available threads or threads that can be contained in the first fabric or second fabric may be used.

[0121] The textile 300 may be formed by knitting or sewing.

[0122] When the second cloth 302 has a higher stretchability and / or stretch rate than the first cloth 201, it can provide further antibacterial properties by concentrating stress more efficiently on the first cloth 301. In other words, when the second cloth 302 is more stretchable than the first cloth 301, the first cloth 301 also stretches together, providing further antibacterial properties.

[0123] When the first cloth 301 has a higher stretchability and / or stretch rate than the second cloth 302, it can provide additional wear comfort along with antibacterial properties. In other words, the first cloth 301 can provide additional wear comfort along with antibacterial properties by being more stretchable compared to the second cloth 302.

[0124] Fabric 301 may be the second fabric and fabric 302 may be the first fabric.

[0125] For this reason, the textile product of the present disclosure can be used in general textile products such as clothing, just like the cloth of the present disclosure. It is particularly preferable to apply the first cloth of the textile product of the present disclosure to areas where bacteria are likely to grow or that are sources of odor, such as the armpit areas of underwear and shirts, and the soles of socks, and to apply the second cloth to other areas.

[0126] (Other fabrics) The textile product of the present disclosure may contain, as the third, fourth, fifth, etc. fabrics, for example, woven fabrics, knitted fabrics, nonwoven fabrics, etc., as necessary. These fabrics are not particularly limited as long as they contain fibers. There are no particular limitations on the type, shape, thickness, dimensions, etc., of the fibers. In addition, the textile product of the present disclosure may further contain leather fabrics, etc.

[0127] The fabric and textile product of the present disclosure are not limited to those described above. The fabric and textile product of the present disclosure will be described in detail below with reference to specific examples, but the present invention is not limited to these examples. EXAMPLES

[0128] (Preparing the thread) The following threads (A) to (N) were prepared. Thread (A): PLA84T72 FOY (Teijin Ltd.) Thread (B): PLA84T72 DTY (Teijin Ltd.) Thread (C): PLA56T72 DTY (Teijin Ltd.) Thread (D): PLA170T144 DTY (Teijin Ltd.) Thread (E): PLA84T24 FOY / / 2SZ500T double thread (Teijin Ltd.) Yarn (F): PLA FTY (PLA84T72 DTY / PU44T1) (Teijin Ltd.) (PU44T1 (Asahi Kasei Corporation) was used as the core yarn, and a covering yarn of PLA84T72 DTY was produced using an Italian-style twisting machine.) Thread (G): PET84T72 DTY (Teijin Ltd.) Thread (H): Nylon woolly thread 78T72 (manufactured by Teijin Ltd.) Thread (I): PET170T144 DTY (Teijin Ltd.) Thread (J): PET FTY (PET84T72 DTY / PU44T1) (Teijin Ltd.) Thread (K): Terramac 84T36 DTY (manufactured by Unitika Ltd.) Thread (L): Bemberg FB84T45 (manufactured by Asahi Kasei Corporation) Yarn (M): 60 count cotton spun yarn Yarn (N): 30-count cotton spun yarn

[0129] PLA: Polylactic acid-based yarn (yarn containing piezoelectric polylactic acid) PET: Polyethylene terephthalate yarn PU: Polyurethane thread

[0130] Example 1 Using yarn (B): PLA84T72 DTY (manufactured by Teijin Limited), a smooth knitted fabric was produced on a double circular knitting machine (28G) according to the conditions shown in Table 1. The fabric was dyed at 110°C and then dry-heat set at 140°C.

[0131] (Examples 2 to 23 and Comparative Examples 1 to 10) In the same manner as in Example 1, the fabrics of Examples 2 to 23 and Comparative Examples 1 to 10 were produced under the conditions shown in Tables 1 to 3 below.

[0132] The "antibacterial activity value" and "wearing comfort" of each fabric can be determined according to the following procedure. The results are shown in Tables 1 to 3 below.

[0133] [Antibacterial activity value of fabric] The antibacterial activity value of a fabric can be determined according to the "bacterial liquid absorption method" among the test methods specified in "Antibacterial test methods and antibacterial effects of textile products" in "JIS L 1902." Specifically, the antibacterial activity value can be determined based on the following formula. [Antibacterial activity value] = [log (arithmetic mean of viable bacteria count after 18 hours of chamber tensile test)] - [log (arithmetic mean of viable bacteria count after 18 hours of chamber static test)] The "chamber tensile test" and "chamber static test" are as follows.

[0134] (Chamber tensile test) For example, in accordance with the apparatus and method described in JP 2019-33709 A, a test was performed under the following conditions, the change in the number of bacteria after 18 hours was examined, and the arithmetic mean of the viable bacteria count was determined. Stretching conditions Sample specimen (12 layers): A 12-layer loop sample was made by folding (30 mm wide, 60 mm long). Initial load: 150g Amplitude: 10mm Stretching and repetition frequency: 3Hz

[0135] (Chamber static test) The sample specimen was set under conditions equivalent to those of the chamber tensile test, and the test was performed without stretching or contracting. The change in the number of bacteria after 18 hours was examined, and the arithmetic mean of the viable bacteria count was determined.

[0136] A bacterial solution of Staphylococcus aureus was used as the test bacterial solution.

[0137] [Fabric comfort] Underwear (100% of each fabric) was produced from the fabrics of Examples 1 to 23 and Comparative Examples 1 to 10 by sewing, and "wearing comfort" was evaluated by 10 subjects according to the following evaluation criteria. Evaluation criteria 1: Very comfortable 2:Excellent comfort 3: Average comfort 4: Poor comfort 5: Very poor comfort The average scores of the evaluation results by the 10 subjects are shown in Tables 1 to 3 below.

[0138] [Table 1]

[0139] [Table 2]

[0140] [Table 3]

[0141] The fabrics of the present disclosure (Examples 1 to 23) all have a parameter X of 1,000 or more. In contrast, the fabrics of Comparative Examples 1 to 10 all had parameter X of less than 1000, and were therefore found to have poor antibacterial properties.

[0142] [Textile products] Textile product A: Underwear The fabric of Example 1 was placed under the armpits of the underwear, and TWINCOT UV 25250 (manufactured by Asahi Kasei Fibers) (vertical stretch rate 74.5%, horizontal stretch rate 92.4%) was placed as a second fabric in the other parts, and the fabric was sewn to produce textile product A (underwear).

[0143] Textile Product B: Socks Using a sock knitting machine (200N), socks with a plating jersey structure were knitted with yarn (D): PLA170T144 DTY (manufactured by Teijin Limited) as the face yarn and yarn (F): PLA FTY (PLA84T72 DTY / PU44T1) (manufactured by Teijin Limited) (PU44T1 (manufactured by Asahi Kasei Corporation) was used as the core yarn, and a covering yarn of PLA84T72 DTY was produced using an Italian-type twisting machine.) as the back yarn.

[0144] Textile Products C: Socks Using a sock knitting machine (200N), socks with a plating jersey structure were knitted using yarn (M): 60-count cotton spun yarn as the face yarn and yarn (F) as the back yarn.

[0145] [Stretch rate] The stretch rate of the fabric was determined based on JIS L1096. (1) Take rectangular samples (approximately 300 mm (length) x approximately 50 mm (width)) in both the vertical direction (wale direction) and horizontal direction (course direction) of the fabric. (2) The sample is clamped with the clamps of the tensile testing machine (distance between clamps: 200 mm). (3) The sample is pulled at a speed of 200 mm / min. (4) Measure the maximum elongation of the sample. (5) Determine the stretch rate.

[0146] [Wearing comfort of textile products] Ten subjects evaluated textile products A to C according to the above-mentioned wearing comfort evaluation criteria. The average evaluation results were all "2 or less," indicating that the textile products exhibited excellent wearing comfort.

[0147] Furthermore, the above textile products A to C satisfy parameter X and therefore have antibacterial properties.

[0148] The present invention is not limited to the above-described embodiments, and may be modified as appropriate and necessary within the scope of the present disclosure. [Industrial Applicability]

[0149] The fabric and textile product of the present disclosure exhibits antibacterial properties and comfortable wearability, and therefore can be suitably used in textile products such as clothing, for example, underwear, socks, undergarments, shirts, sportswear, and supports, etc. In particular, the fabric of the present disclosure can be used in areas where bacteria are likely to grow or that are sources of odor, particularly the armpit areas of underwear and shirts, and the soles of socks.

[0150] The fabrics and textiles of the present disclosure may also be used in medical supplies, such as, for example, bandages, gauze, masks, and doctor and patient clothing, because they exhibit antibacterial properties and are comfortable to wear.

[0151] Alternatively, the fabrics and textile products of the present disclosure may be used in any product field, such as handkerchiefs, towels, footwear (e.g., insoles for shoes and boots), hats, bedding (e.g., futons, mattresses, sheets, pillows and pillowcases), stuffed toys, pet-related products (e.g., pet mats, pet clothing and innerwear for pet clothing), various mat products (e.g., foot mats and toilet mats), curtains, kitchen utensils (e.g., sponges and dish towels), seats (e.g., car, train and airplane seats), sofas, sanitary products, sporting goods, and the like. [Explanation of symbols]

[0152] 1. Thread 20 Loop 21 Needle section 22 Sinker Section 23 Middle Section 30 Loops (with tucks) 31 Needle part (with tuck) 32 Sinker part (with tuck) 33 Middle part (with tuck) 100,200,300 Textile products 101,201,301 First Cloth 102,202,302 Second Cloth

Claims

1. A fabric comprising a yarn comprising an electric potential generating filament containing polylactic acid, the crystallinity of the polylactic acid being between 35% and 50% and optionally including loops of the yarn, the fabric having a crystallinity of between 35% and 50% and a crystallinity of between 35% and 50%. X=(A+B)×C×D×E [In the formula, A represents the loop angle of the loop contained in the yarn when the fabric is stretched by 10%, B represents the connection angle of the loops contained in the yarn when the fabric is stretched by 10%, C is 1 cm of the fabric ２ indicates the number of loops of the yarn per loop, D is the basis weight (g / m ２ ) indicates the force (N) applied per E denotes the surface potential of the yarn (V). The value of the parameter X represented by the formula (1) is 1000 or more.

2. 2. The fabric of claim 1, wherein the value of the parameter X is less than or equal to 100,000.

3. 3. The fabric of claim 1 or 2, wherein the electric potential generating filaments comprise a piezoelectric material.

4. The fabric according to any one of claims 1 to 3, wherein the fabric is a knitted fabric.

5. The fabric of any one of claims 1 to 4, wherein the fabric exhibits antibacterial properties.

6. The fabric according to any one of claims 1 to 5, wherein the fabric exhibits comfort when worn.

7. A textile product comprising a first fabric and a second fabric, The first fabric may be a fabric including a thread comprising an electric potential generating filament including polylactic acid, the crystallinity of the polylactic acid being 35% or more and 50% or less, the first fabric may include loops of the thread, and the first fabric may have a crystallinity of the following formula: X=(A+B)×C×D×E [In the formula, A represents the loop angle of the loop contained in the yarn when the fabric is stretched by 10%, B represents the connection angle of the loops contained in the yarn when the fabric is stretched by 10%, C is 1 cm of the fabric ２ indicates the number of loops of the yarn per loop, D is the basis weight (g / m ２ ) indicates the force (N) applied per E denotes the surface potential of the yarn (V). The value of the parameter X represented by the formula (1) is 1000 or more, The second fabric has elasticity. Textile products.

8. The textile article of claim 7 , wherein the second fabric has a higher stretchability than the first fabric.

9. 9. The textile product according to claim 7 or 8, wherein the second fabric has a stretch rate of 40% or more in a first direction and a stretch rate of 40% or more in a second direction perpendicular to the first direction.

10. The textile product according to any one of claims 7 to 9, wherein the first fabric exhibits antibacterial properties and wearing comfort.

11. The textile product according to any one of claims 7 to 10, wherein the second fabric provides additional wearing comfort compared to a textile product comprising only the first fabric.

12. The textile article of claim 7 , wherein the first fabric has a higher stretchability than the second fabric.

13. 13. The textile article of claim 12, wherein the first fabric exhibits antimicrobial properties.

14. The textile product according to any one of claims 7 to 13, wherein the second fabric comprises yarns comprising electric potential generating filaments.

15. 15. The textile article of claim 14, wherein the second fabric exhibits additional antimicrobial properties.

16. The textile product according to any one of claims 7 to 15, which is a garment selected from the group consisting of underwear, socks, undergarments, shirts, sportswear and supports.

17. The textile product according to any one of claims 7 to 15, wherein the textile product is a medical product selected from the group consisting of bandages, gauze, masks and doctor and patient clothes.

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