Knitted fabric

Abstract

Provided is a knitted fabric having excellent bending softening properties. The present invention relates to a knitted fabric comprising a front knitted fabric structure, a back knitted fabric structure, and a binding yarn that binds the front knitted fabric structure and the back knitted fabric structure, in which the front knitted fabric structure and the back knitted fabric structure contain non-elastic fibers, and the binding yarn contains elastic fibers. The knitting density of the binding yarns, which is defined by the following formula, is 1 / 3 or more, and the air permeability of the knitted fabric is 70 cm < 3 > / cm < 2 > * s or more: the knitting density of the binding yarns = (the number of courses in which the binding yarns are knitted in one complete weave) / (the number of all courses in one complete weave).

Description

Technical Field

[0001] The present invention relates to knitted fabrics. Background Art

[0002] Knitted fabrics made by connecting two knitted fabrics with elastic fibers are increasingly in demand as fabrics for comfortable clothing, mainly in outerwear, underwear, and sportswear.

[0003] For example, the following Patent Document 1 discloses a three-dimensional elastic circular knitted fabric, which is formed by combining two front and back knitted fabric structures with a binding yarn formed only of a tuck structure, wherein the two front and back knitted fabric structures are composed only of non-elastic fibers, the binding yarn is composed only of elastic fibers, the elastic fibers are interwoven at 5 to 15 courses / 1 repeating unit, the knitted fabric has a pile density of 40 to 130 courses / inch and 35 to 80 wales / inch, a filling factor of 5.0 to 15.0% or less, a heat retention factor of 20.0% or more, and a 2.25 kg constant load elongation of 50 to 200% in the longitudinal direction and 150 to 300% in the transverse direction.

[0004] In addition, the following patent document 2 discloses an elastic knitted fabric having a multilayer structure formed by combining two independent layers of bottom knitted fabrics on the surface and the inside, wherein the two layers of bottom knitted fabrics are connected only by naked yarns of polyurethane elastic fibers of 17 to 3000 dtex.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Publication No. 2019-206772

[0008] Patent Document 2: International Publication No. 2003 / 038173 Summary of the invention

[0009] Problem that the invention aims to solve

[0010] However, in the knitted fabric described in Patent Document 1, since the elastic fibers are interlaced at 5 to 15 courses / 1 repeating unit, the degree of freedom of the pile of the inelastic fibers constituting the knitted fabric structure becomes large, and the thickness of the knitted fabric becomes relatively large. As a result, in the knitted fabric described in Patent Document 1, it is difficult to obtain high bending flexibility required for use in underwear, sportswear, etc.

[0011] In addition, the knitted fabric described in Patent Document 2 is dense and has a large air permeability resistance, so the friction between the fibers is relatively large. As a result, it is particularly difficult to obtain high bending softening required for uses such as underwear and sportswear in the knitted fabric described in Patent Document 2.

[0012] In view of the above-mentioned problems of the prior art, an object of the present invention is to provide a knitted fabric having excellent bending softening properties.

[0013] Solutions for solving problems

[0014] In order to solve the above-mentioned problems, the present inventors conducted intensive studies and repeated research, and unexpectedly found that the problems can be solved by the following structure, thereby completing the present invention.

[0015] [1] A knitted fabric comprising a surface knitted fabric structure, a back knitted fabric structure, and a binding yarn for binding the surface knitted fabric structure and the back knitted fabric structure together, wherein the surface knitted fabric structure and the back knitted fabric structure contain inelastic fibers, the binding yarn contains elastic fibers, the knitting density of the binding yarn defined by the following formula is 1 / 3 or more, and the air permeability of the knitted fabric is 70 cm 3 / cm 2 s and above:

[0016] The knitting density of the binding yarn=(the number of courses knitted with the binding yarn in one complete stitch) / (the total number of courses in one complete stitch).

[0017] [2] The knitted fabric according to [1], wherein the air permeability of the knitted fabric is 100 cm 3 / cm 2 ·s or more.

[0018] [3] The knitted fabric according to [1] or [2], wherein the ratio of the mass of the elastic fibers contained in the binding yarn to the mass of the inelastic fibers contained in the surface knitted fabric structure or the back knitted fabric structure is 0.02 to 0.40.

[0019] [4] The knitted fabric according to [3], wherein the ratio of the mass of the elastic fibers contained in the binding yarn to the mass of the inelastic fibers contained in the surface knitted fabric structure or the back knitted fabric structure is 0.02 to 0.16.

[0020] [5] The knitted fabric according to [3] or [4], wherein the ratio of the fineness of the elastic fiber contained in the binding yarn to the fineness of the inelastic fiber contained in the surface knitted fabric structure or the back knitted fabric structure is 0.12 to 0.78.

[0021] [6] The knitted fabric according to any one of [1] to [5], wherein the surface knitted fabric structure and the back knitted fabric structure are composed only of inelastic fibers.

[0022] [7] The knitted fabric according to any one of [1] to [6], wherein the binding yarn is composed only of elastic fibers.

[0023] [8] The knitted fabric according to any one of [1] to [7], wherein the binding yarn binds the surface knitted fabric structure and the back knitted fabric structure only through a tuck structure.

[0024] [9] The knitted fabric according to any one of [1] to [8], wherein the knitting density of the binding yarn is 1 / 1.

[0025]

[10] The knitted fabric according to any one of [1] to [9], wherein the thickness of the knitted fabric is 1.00 mm or less.

[0026]

[11] The knitted fabric according to any one of [1] to

[10] , wherein the elastic fiber has a fineness of 50 dtex or less.

[0027]

[12] The knitted fabric according to any one of [1] to

[11] , wherein the fineness of the inelastic fiber is 150 dtex or less.

[0028]

[13] The knitted fabric according to [4], wherein the surface knitted fabric structure and the inner knitted fabric structure are composed only of non-elastic fibers, the binding yarn is composed only of elastic fibers, and the binding yarn is used to bind the surface knitted fabric structure and the inner knitted fabric structure only through a collection loop structure.

[0029]

[14] The knitted fabric according to any one of [1] to

[13] , wherein the knitted fabric is a weft knitted fabric.

[0030] Effects of the Invention

[0031] The knitted fabric of the present invention is a knitted fabric having excellent bending softening property. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a knitting structure diagram of the knitted fabrics of Examples 1 to 4.

[0033] Figure 2 This is a knitting structure diagram of the knitted fabric of Comparative Example 1.

[0034] Figure 3 This is an example of a cross section of the knitted fabric of the present embodiment. DETAILED DESCRIPTION

[0035] Hereinafter, embodiments of the present invention will be described in detail.

[0036] The present embodiment provides a knitted fabric, which includes a surface knitted fabric structure, an inner knitted fabric structure, and a binding yarn for binding the surface knitted fabric structure and the inner knitted fabric structure, wherein the surface knitted fabric structure and the inner knitted fabric structure contain non-elastic fibers, the binding yarn contains elastic fibers, the knitting density of the binding yarn defined by the following formula is greater than 1 / 3, and the air permeability of the knitted fabric is 70 cm 3 / cm 2 s and above:

[0037] The knitting density of the binding yarn=(the number of courses knitted with the binding yarn in one complete stitch) / (the total number of courses in one complete stitch).

[0038] The knitted fabric of the present embodiment may be any of a weft knitted fabric and a warp knitted fabric, but is preferably a weft knitted fabric. The knitted fabric of the present embodiment is preferably produced by a double circular knitting machine.

[0039] The knitted fabric of the present embodiment includes a surface knitted fabric structure and an inner knitted fabric structure. The surface knitted fabric structure and the inner knitted fabric structure include inelastic fibers and may also include elastic fibers, but are preferably composed of inelastic fibers only. In this specification, "inelastic fibers" refer to fibers with a maximum elongation of less than 100%, and "elastic fibers" refer to fibers with a maximum elongation of more than 100%. For the inelastic fibers included in the surface knitted fabric structure and the inner knitted fabric structure, natural fibers, chemical fibers, etc. can be used without particular restrictions. As natural fibers, cotton, linen, silk, wool, etc. can be cited. In addition, as chemical fibers, polyester fibers such as polyethylene terephthalate and polytrimethylene terephthalate, polyamide fibers such as nylon 6 and nylon 66, rayon, cuprammonium fibers, regenerated cellulose fibers such as Tencel, etc. can be cited. They can be arbitrarily selected from glossy yarns, semi-dull yarns, full-dull yarns, etc., and the cross-sectional shape of the fiber can be any cross-sectional shape such as round, elliptical, W-shaped, cocoon-shaped, hollow fibers, etc. The fiber form is not particularly limited, and may be a raw yarn, a crimped yarn such as a false twist, etc., and is preferably a raw yarn from the viewpoint of bending softening. In addition, these inelastic fibers may be in the form of composite fibers such as composite fibers based on interweaving or twisting. From the viewpoint of bending softening of knitted fabrics, the fineness of the inelastic fibers is preferably 150 dtex or less.

[0040] The knitted fabric of the present embodiment includes a binding yarn connected to the surface knitted fabric structure and the back knitted fabric structure. The binding yarn includes elastic fibers, and may also be a composite yarn such as a covered yarn including inelastic fibers, but is preferably composed of only elastic fibers. The composition and manufacturing method of the elastic fibers included in the binding yarn are not particularly limited, and may be polyurethane or polyester elastic fibers, and may be manufactured by a known spinning method. For example, as polyurethane elastic fibers, polyurethane elastic fibers manufactured by melt spinning, dry spinning or wet spinning can be used. The elastic fibers are preferably fibers whose elasticity is not impaired at a normal treatment temperature of about 140 to 170° C. in the final setting process during dyeing. In addition, as elastic fibers, elastic fibers that are given functional properties such as high setting properties, antibacterial properties, moisture absorption, and water absorption by adding special polymers and powders can also be used. From the viewpoint of the bending softening property of the knitted fabric, the fineness of the elastic fibers is preferably 50 dtex or less, and more preferably 17 to 44 dtex.

[0041] The knitting density of the binding yarns of the knitted fabric of the present embodiment, which is defined by the following formula, is 1 / 3 or more:

[0042] The knitting density of the binding yarn=(the number of courses knitted with the binding yarn in one complete stitch) / (the total number of courses in one complete stitch).

[0043] Here, one complete structure refers to the smallest repeating unit of the knitting structure constituting the knitted fabric. Figure 1 In the case of the weave diagram, the total number of stitch rows in one complete weave is 2 stitch rows, and the number of stitch rows in which the binding yarn is knitted in one complete weave is 2 stitch rows. Therefore, the knitting density of the binding yarn is 1 / 1. Figure 2 In the case of a knitting structure diagram, the total number of coil rows in one complete structure is 8 coil rows, and the number of coil rows in which the binding yarn is knitted in one complete structure is 2 coil rows, so the knitting density of the binding yarn is 1 / 4. Since the knitting density of the binding yarn is 1 / 3 or more, the degree of freedom of the pile loops of the non-elastic fibers constituting the front and back knitted fabric structures is reduced due to the binding yarn, thereby reducing the thickness of the knitted fabric and achieving the effect of bending softening of the knitted fabric. From the viewpoint of bending softening of the knitted fabric, the knitting density of the binding yarn is preferably 1 / 2 or more, and most preferably 1 / 1. The knitting density of the binding yarn of 1 / 1 is a state in which the binding yarn is included in all the coil rows.

[0044] The air permeability of the knitted fabric of the present embodiment according to JIS-L1096-A method (Frazier method) is 70 cm 3 / cm 2 ·s or more, preferably 100cm 3 / cm 2·s or more, more preferably 120cm 3 / cm 2 ·s or more. If the air permeability is 70cm 3 / cm 2 ·s or more, the knitted fabric becomes a moderately sparse structure, so the friction between the fibers is reduced, and the knitted fabric is bent and softened. 3 / cm 2 ·s or more, it is preferred to design the knitted fabric in such a manner as not to increase the friction between the fibers as follows: the surface knitted fabric structure and the back knitted fabric structure are composed only of inelastic fibers, the binding yarn is composed only of elastic fibers, the surface knitted fabric structure and the back knitted fabric structure are bound by the binding yarn only through the tuck structure, the fineness of the elastic fiber contained in the connecting yarn is 50 dtex or less, or the fineness of the inelastic fiber contained in the surface knitted fabric structure and the back knitted fabric structure is 150 dtex or less, etc.

[0045] In the knitted fabric of the present embodiment, the thickness of the course including the binding yarn is preferably 1.00 mm or less. When the thickness of the knitted fabric is 1.00 mm or less, the knitted fabric bends and softens.

[0046] In the knitted fabric of the present embodiment, the ratio of the mass of the elastic fiber contained in the binder yarn to the mass of the inelastic fiber contained in the surface knitted fabric structure or the back knitted fabric structure is preferably 0.02 to 0.40, more preferably 0.02 to 0.24, and even more preferably 0.02 to 0.16. If the ratio is 0.16 or less, the surface knitted fabric structure and the back knitted fabric structure are close to each other due to the elasticity of the elastic fiber contained in the binder yarn, and the thickness becomes smaller, so the knitted fabric is bent and softened. If the ratio is 0.02 or more, the elastic fiber contained in the binder yarn can fully bear the mass of the inelastic fiber and the yarn is not easily broken. In order to make the above ratio 0.02 to 0.16, it is preferred that the ratio of the fineness of the elastic fiber contained in the binder yarn to the fineness of the inelastic fiber contained in the surface knitted fabric structure or the back knitted fabric structure is 0.12 to 0.78 or the ratio of the length of the elastic fiber contained in the binder yarn to the length of the inelastic fiber contained in the surface knitted fabric structure or the back knitted fabric structure is 0.35 or less.

[0047] Example

[0048] Hereinafter, the present invention will be described in more detail by way of examples and comparative examples, but the present invention is not limited to these examples.

[0049] First, the measurement methods of various physical properties used in Examples and Comparative Examples are described.

[0050] (1) Weight per unit area (g / m 2 )

[0051] A 10 cm × 10 cm sample was cut out from the knitted fabric that had been conditioned at 20°C and 65% RH for one day, and the weight was measured in g using a precision balance, multiplied by 100, and converted to g / m 2 , calculate the weight per unit area of ​​the knitted fabric.

[0052] (2) Air permeability (cm) 3 / cm 2 ·s)

[0053] The measurement was performed in accordance with JIS-L1096-A method (Frazier method) to determine the amount of air passing through the test piece per unit area and per unit time.

[0054] (3) Thickness of knitted fabric (mm)

[0055] In the horizontal row of stitches containing the binding yarn, the knitted fabric was cut in the weft direction to prepare an observation sample. The observation sample in a non-tensioned state was adhered and fixed to the platform using double-sided tape. Then, a cross-section of the horizontal row of stitches containing the binding yarn was photographed from the knitting end side using a microscope (VHX-6000 manufactured by Keyence Corporation). In the photographed image, Figure 3 In this way, two straight lines are drawn so that the straight line that the apex of the surface knitted fabric structure contacts and the straight line that the apex of the back knitted fabric structure contacts are parallel to each other. The distance between these two straight lines is taken as the thickness of the knitted fabric.

[0056] (4) Bending stiffness of knitted fabric (cN·cm 2 / cm)

[0057] The measurement was performed using the KES-FE2-AUTO-A automatic pure bending tester manufactured by KATO TECH Co., Ltd. A knitted fabric cut into a width of 20.0 cm and a length of 20.0 cm was used as a test piece. The test piece was placed on the sample table in such a way that the cut portion of the knitted fabric in the warp direction was located on the inner side of the sample table, and the test piece was inserted to the inner side until the sample insertion position confirmation lamp was lit, and the bending stiffness of the knitted fabric in the weft direction (the hardness of the knitted fabric when bent in a manner that a crease is generated in the warp direction of the knitted fabric) was measured. In addition, in the present embodiment, although the measurement sensitivity is set to 4.0 gf·cm / 10V, it can also be appropriately adjusted within the range of 4.0 to 50.0 gf·cm / 10V according to the size of the bending stiffness of the test piece. In the test machine, the bending stiffness when the knitted fabric is bent upward and the bending stiffness when it is bent downward are measured, and the average value is used. The test was carried out on 3 test pieces, and the average value was calculated. In addition, in the test machine, the unit is gf·cm 2 / cm is output, so multiply it by 0.980665 to convert it to cN·cm 2 / cm.

[0058] The smaller the bending stiffness, the better the softness of the knitted fabric. 2 / cm or less, the bending is judged to be soft. Furthermore, if it is 0.0100 cN·cm 2 / cm or less, it was judged that the bending softening property was excellent.

[0059] (5) Ratio of the mass of elastic fibers contained in the binding yarn to the mass of inelastic fibers contained in the surface knitted fabric structure or the back knitted fabric structure (in the table, indicated as "mass ratio").

[0060] A knitted fabric of 1 course × 100 wales was cut out from a knitted fabric that had been conditioned for 1 day at 20°C and 65%RH, and the inelastic fibers contained in the surface knitted fabric structure, the inelastic fibers contained in the back knitted fabric structure, and the elastic fibers contained in the binding yarn were extracted, and their respective masses were measured using a precision balance, and the larger mass of the inelastic fibers contained in the surface knitted fabric structure and the inelastic fibers contained in the back knitted fabric structure was defined as W1 (g), and the mass of the elastic fibers contained in the binding yarn was defined as W2 (g). The ratio of W2 to W1, W2 / W1, was calculated and defined as the ratio of the mass of the elastic fibers contained in the binding yarn to the mass of the inelastic fibers contained in the surface knitted fabric structure or the back knitted fabric structure.

[0061] (6) The ratio of the fineness of the elastic fibers contained in the binding yarn to the fineness of the inelastic fibers contained in the surface knitted fabric structure or the back knitted fabric structure (in the table, indicated as "fineness ratio").

[0062] The fineness of the inelastic fibers contained in the surface knitted fabric structure and the inelastic fibers contained in the back knitted fabric structure extracted in (5) is measured by applying a load of an assumed fineness (dtex)×0.09g, and the larger fineness is set as F1 (dtex). In addition, the fineness of the elastic fibers contained in the binding yarn in the unloaded state is set as F2 (dtex). The ratio of F2 to F1 is calculated as F2 / F1, and is taken as the ratio of the fineness of the elastic fibers contained in the binding yarn to the fineness of the inelastic fibers contained in the surface knitted fabric structure or the back knitted fabric structure.

[0063] (7) The ratio of the length of the elastic fibers contained in the binding yarn to the length of the inelastic fibers contained in the surface knitted fabric structure or the back knitted fabric structure (in the table, indicated as "yarn length ratio").

[0064] The lengths of the inelastic fibers contained in the surface knitted fabric structure and the inelastic fibers contained in the back knitted fabric structure extracted in (5) are measured by applying a load of an assumed fineness (dtex)×0.09 g, and the longer one is defined as L1 (mm). In addition, the length of the elastic fibers contained in the binding yarn in the unloaded state is defined as L2 (mm). The ratio of L2 to L1 is calculated as L2 / L1, and is defined as the ratio of the length of the elastic fibers contained in the binding yarn to the length of the inelastic fibers contained in the surface knitted fabric structure or the back knitted fabric structure.

[0065] [Example 1]

[0066] Use a 40 gauge two face circular knitting machine, such as Figure 1 As shown in the knitting structure diagram, nylon (in the table, indicated as "Ny") 33 dtex 6 filaments are supplied from yarn feed ports F1 and F4 to form a plain stitch as the surface knitted fabric structure, cotton (in the table, indicated as "Co") 120 / - is supplied from yarn feed ports F2 and F5 to form a plain stitch as the back knitted fabric structure, and polyurethane (in the table, indicated as "Pu") 22 dtex is supplied from yarn feed ports F3 and F6 to form a tuck stitch as a binding yarn, thereby knitting a grey fabric. After the knitted grey fabric is relaxed and scoured using a continuous water-based relaxation / refining machine, it is pre-set at 185°C for 1 minute. The cotton is reactively dyed and the nylon is acid-dyed using a liquid flow dyeing machine, and the final setting is performed at 160°C for 1 minute to obtain a knitted fabric. In the obtained knitted fabric, the weight ratio of cotton yarn is 55%, the weight ratio of nylon yarn is 38%, the weight ratio of polyurethane yarn is 7%, and the weight per unit area is 105 g / m 2 , thickness is 0.66mm, air permeability is 255cm 3 / cm 2 ·s, bending stiffness is 0.0031cN·cm 2 / cm. The results are shown in Table 1 below.

[0067] [Example 2]

[0068] Use a 40 gauge two face circular knitting machine, such as Figure 1As shown in the knitting structure diagram, nylon 33 dtex 6 filaments are supplied from yarn supply ports F1 and F4 to form a plain stitch as the surface knitted fabric structure, cationic dyeable polyester (in the table, it is indicated as "CDPe") 33 dtex 36 filaments are supplied from yarn supply ports F2 and F5 to form a plain stitch as the back knitted fabric structure, and polyurethane 22 dtex is supplied from yarn supply ports F3 and F6 to form a tuck stitch as a binding yarn, thereby knitting a grey fabric. After the knitted grey fabric is relaxed and refined using a continuous water-based relaxation / refining machine, it is pre-set at 185°C for 1 minute. Cationic dyeing of the cationic dyeable polyester and acid dyeing of the nylon are performed using a liquid flow dyeing machine, and final setting is performed at 160°C for 1 minute to obtain a knitted fabric. In the obtained knitted fabric, the yarn weight mixing ratio of nylon is 46%, the yarn weight mixing ratio of the cationic dyeable polyester is 45%, the yarn weight mixing ratio of the polyurethane is 9%, and the unit area weight is 87g / m 2 , thickness is 0.55mm, air permeability is 453cm 3 / cm 2 ·s, bending stiffness is 0.0016cN·cm 2 / cm. The results are shown in Table 1 below.

[0069] [Example 3]

[0070] Use a 28 gauge two face circular knitting machine, such as Figure 1 As shown in the knitting structure diagram, cotton 80 / - is supplied from yarn supply ports F1 and F4 to form a plain stitch as the surface knitted fabric structure, cuprammonium fiber (in the table, it is marked as "Cu") short fiber 60 / - is supplied from yarn supply ports F2 and F5 to form a plain stitch as the inner knitted fabric structure, and polyurethane 33 dtex is supplied from yarn supply ports F3 and F6 to form a tuck stitch as a binding yarn, thereby weaving a grey fabric. After the woven grey fabric is relaxed and refined using a continuous water-based relaxation / refining machine, it is pre-set at 185°C for 1 minute. The cotton and cuprammonium fiber are reactively dyed using a liquid flow dyeing machine, and the final setting is performed at 160°C for 1 minute. In the obtained knitted fabric, the yarn weight mixing ratio of cuprammonium fiber is 52%, the yarn weight mixing ratio of cotton is 40%, the yarn weight mixing ratio of polyurethane is 8%, and the unit area weight is 173g / m 2 , thickness is 0.82mm, air permeability is 144cm 3 / cm 2 ·s, bending stiffness is 0.0076cN·cm 2 / cm. The results are shown in Table 1 below.

[0071] [Example 4]

[0072] A knitted fabric was produced in the same manner as in Example 3 except that the amount of elastic fiber supplied was increased so that the length of the binding yarn became 1.6 times, and the grey fabric was knitted. In the obtained knitted fabric, the yarn weight mixing ratio of the cuprammonium fiber was 50%, the yarn weight mixing ratio of the cotton was 38%, the yarn weight mixing ratio of the polyurethane was 12%, and the unit area weight was 181 g / m 2 , thickness is 1.23mm, air permeability is 138cm 3 / cm 2 / sec, bending stiffness is 0.0130cN·cm 2 / cm. The results are shown in Table 1 below.

[0073] [Comparative Example 1]

[0074] Use a 26 gauge two face circular knitting machine, such as Figure 2 As shown in the knitting structure diagram, polyester (in the table, "Pe") false twist yarn 72 dtex 72 filaments are supplied from yarn feed ports F1, F4, F6, F8, F10, F13, F15, and F17 to form a plain stitch as the surface knitted fabric structure, polyester false twist yarn 72 dtex 72 filaments are supplied from yarn feed ports F2, F5, F7, F9, F11, F14, F16, and F18 to form a plain stitch as the back knitted fabric structure, and polyurethane 78 dtex is supplied from yarn feed ports F3 and F12 to form a tuck stitch as a binding yarn, thereby knitting a grey fabric. After the knitted grey fabric is relaxed and smelted using a continuous water-based relaxation / refining machine, it is pre-set at 185°C for 1 minute. Polyester is disperse-dyed using a liquid jet dyeing machine, and final setting is performed at 160°C for 1 minute to obtain a knitted fabric. The knitted fabric had a polyester yarn weight ratio of 90%, a polyurethane yarn weight ratio of 10%, and a unit area weight of 179 g / m 2 , thickness is 1.81mm, air permeability is 55cm 3 / cm 2 ·s, bending stiffness is 0.1057cN·cm 2 / cm. The results are shown in Table 1 below.

[0075] [Comparative Example 2]

[0076] Using a 28-gauge two-face circular knitting machine, polyester false twist yarn 84 dtex 72 filaments and cationic dyeable polyester false twist yarn 84 dtex 36 filaments were supplied in an interlaced manner of 20:4 to form a plain stitch as the surface knitted fabric structure, cationic dyeable polyester false twist yarn 84 dtex 36 filaments were supplied to form a plain stitch as the back knitted fabric structure, and polyurethane 78 dtex was supplied to form a tuck stitch as a binding yarn, thereby knitting a grey fabric. After the knitted grey fabric was relaxed and scooped using a continuous water-based relaxation / refining machine, it was pre-set at 185°C for 1 minute. The cationic dyeable polyester was cationic dyed using a liquid jet dyeing machine, and the final setting was performed at 160°C for 1 minute to obtain a knitted fabric. In the obtained knitted fabric, the yarn weight of the cationic dyeable polyester was 53%, the yarn weight mixing ratio of the polyester was 38%, the yarn weight mixing ratio of the polyurethane was 9%, and the unit area weight was 164g / m 2 , thickness is 1.45mm, air permeability is 147cm 3 / cm 2 ·s, bending stiffness is 0.0394cN·cm 2 / cm. The results are shown in Table 1 below.

[0077] [Comparative Example 3]

[0078] Use a 40 gauge two face circular knitting machine, such as Figure 1 As shown in the structure diagram, nylon 22 dtex 24 filaments and polyurethane 22 dtex are supplied from yarn feed ports F1 and F4 through plating weaving to form a bare spandex plain stitch as the surface knitted fabric structure, cationic dyeable polyester 22 dtex 24 filaments and polyurethane 22 dtex are supplied from yarn feed ports F2 and F5 through plating weaving to form a bare spandex plain stitch as the back knitted fabric structure, and polyurethane 17 dtex is supplied from yarn feed ports F3 and F6 to form a tuck stitch as a binding yarn, thereby knitting a grey fabric. After the knitted grey fabric is relaxed and scoured using a continuous water-based relaxation / refining machine, it is pre-set at 185°C for 1 minute. Cationic dyeing of the cationic dyeable polyester and acid dyeing of nylon are performed using a liquid flow dyeing machine, and final setting is performed at 160°C for 1 minute to obtain a knitted fabric. In the obtained knitted fabric, the yarn weight mixing ratio of nylon is 34%, the yarn weight mixing ratio of cationic dyeable polyester is 34%, and the yarn weight mixing ratio of polyurethane is 32%, and the unit area weight is 151g / m 2 , thickness is 0.42mm, air permeability is 51cm 3 / cm 2 ·s, bending stiffness is 0.0192cN·cm 2 / cm. The results are shown in Table 1 below.

[0079] [Comparative Example 4]

[0080] Use a two-face circular knitting machine with a gauge of 18, such as Figure 1 As shown in the structure diagram, cotton 30 / - is supplied from yarn supply ports F1 and F4 to form a plain stitch as the surface knitted fabric structure, polyester 167 dtex 144 filaments are supplied from yarn supply ports F2 and F5 to form a plain stitch as the back knitted fabric structure, and polyester false twist yarn 56 dtex 24 filaments are supplied from yarn supply ports F3 and F6 to form a tuck stitch as a binding yarn, thereby weaving a grey fabric. After the woven grey fabric is relaxed and refined using a continuous water-based relaxation / refining machine, it is pre-set at 185°C for 1 minute. Cotton is reactively dyed and polyester is disperse-dyed using a liquid flow dyeing machine, and final setting is performed at 160°C for 1 minute to obtain a knitted fabric. In the obtained knitted fabric, the polyester yarn weight mixing ratio is 60%, the cotton yarn weight mixing ratio is 40%, and the unit area weight is 286g / m 2 , thickness is 1.09mm, air permeability is 87cm 3 / cm 2 ·s, bending stiffness is 0.1405cN·cm 2 / cm. The results are shown in Table 1 below.

[0081] [Table 1]

[0082]

[0083] Industrial Applicability

[0084] The knitted fabric of the present invention has bending softening property and can therefore be preferably used for outerwear, underwear and sportswear.

[0085] Description of Reference Numerals

[0086] 1. The surface knitted fabric structure; 2. The inner knitted fabric structure.

Claims

1. A knitted fabric comprising a surface knitted fabric structure, an inner knitted fabric structure, and a binding yarn for binding the surface knitted fabric structure and the inner knitted fabric structure, wherein: The surface knitted fabric structure and the inner knitted fabric structure contain non-elastic fibers, the binding yarn contains elastic fibers, the knitting density of the binding yarn defined by the following formula is 1 / 3 or more, and the air permeability of the knitted fabric is 70 cm 3 / cm 2 s and above: The knitting density of the binding yarn=(the number of courses knitted with the binding yarn in one complete stitch) / (the total number of courses in one complete stitch).

2. The knitted fabric according to claim 1, wherein: The air permeability of knitted fabric is 100cm 3 / cm 2 ·s or more.

3. The knitted fabric according to claim 1 or 2, wherein: The ratio of the mass of the elastic fibers contained in the binding yarn to the mass of the inelastic fibers contained in the surface knitted fabric structure or the back knitted fabric structure is 0.02 to 0.

40.

4. The knitted fabric according to claim 3, wherein: The ratio of the mass of the elastic fibers contained in the binding yarn to the mass of the inelastic fibers contained in the surface knitted fabric structure or the back knitted fabric structure is 0.02 to 0.

16.

5. The knitted fabric according to claim 3, wherein: The ratio of the fineness of the elastic fiber contained in the binding yarn to the fineness of the inelastic fiber contained in the surface knitted fabric structure or the back knitted fabric structure is 0.12 to 0.

78.

6. The knitted fabric according to claim 1 or 2, wherein: The surface knitted fabric structure and the back knitted fabric structure are composed only of non-elastic fibers.

7. The knitted fabric according to claim 1 or 2, wherein: The binding yarns consist only of elastane fibers.

8. The knitted fabric according to claim 1 or 2, wherein: The binding yarn binds the surface knitted fabric structure and the inner knitted fabric structure only through the tuck structure.

9. The knitted fabric according to claim 1 or 2, wherein: The weaving density of the binding yarn is 1 / 1.

10. The knitted fabric according to claim 1 or 2, wherein: The knitted fabric has a thickness of 1.00 mm or less.

11. The knitted fabric according to claim 1 or 2, wherein: The elastic fiber has a fineness of 50 dtex or less.

12. The knitted fabric according to claim 1 or 2, wherein: The fineness of the non-elastic fiber is 150 dtex or less.

13. The knitted fabric according to claim 4, wherein: The surface knitted fabric structure and the back knitted fabric structure are composed only of non-elastic fibers, the binding yarn is composed only of elastic fibers, and the binding yarn binds the surface knitted fabric structure and the back knitted fabric structure only through a tuck structure.

14. The knitted fabric according to claim 1 or 2, wherein: The knitted fabric is a weft knitted fabric.

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