Knitted fabric

Abstract

The present invention provides a knitted fabric with excellent bending softness. The present invention relates to a knitted fabric comprising a surface knitted fabric structure, an inside knitted fabric structure, and a binder yarn which binds the surface knitted fabric structure and the inside knitted fabric structure, wherein the surface knitted fabric structure and the inside knitted fabric structure comprise non-elastic fibers, the binder yarn comprises elastic fibers, the knitting density of the binder 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 or more: knitting density of the binder yarn = (number of courses in which the binder yarn is incorporated in 1 complete structure) / (total number of courses in 1 complete structure).

Description

Technical Field

[0001] This invention relates to knitted fabrics. Background Technology

[0002] Knitted fabrics, which use elastic fibers to connect the two knitted pieces, are increasingly in demand as a material for comfortable clothing, primarily for outerwear, underwear, and sportswear.

[0003] For example, Patent Document 1 discloses a three-dimensional elastic circular knitted fabric, which is formed by combining two knitted fabrics of the outer and inner layers using a binding yarn consisting only of a tuck weave. The two knitted fabrics are composed only of non-elastic fibers, and the binding yarn is composed only of elastic fibers. The elastic fibers are interwoven with 5 to 15 loop rows / 1 repeating unit. The loop density of the knitted fabric is 40 to 130 loop rows / inch and 35 to 80 loop warp / inch. The fill power is 5.0 to 15.0% or less, the heat retention is 20.0% or more, and the elongation at a constant load of 2.25 kg is 50 to 200% in the longitudinal direction and 150 to 300% in the transverse direction.

[0004] In addition, Patent Document 2 discloses an elastic knitted fabric having a multi-layer structure that combines two separate bottom knitted fabrics on the surface and inside, wherein the two bottom knitted fabrics are connected only by bare yarns of polyurethane elastic fibers of 17 to 3000 dtex.

[0005] Existing technical documents

[0006] Patent documents

[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] The problem the invention aims to solve

[0010] However, in the knitted fabric described in Patent Document 1, since the elastic fibers are interwoven with 5 to 15 loop rows / 1 repeating unit, the degree of freedom of the loops of the non-elastic fibers constituting the knitted fabric structure is increased, resulting in a relatively large thickness of the knitted fabric. As a result, it is particularly difficult to obtain the high flexibility required for applications such as underwear and sportswear in the knitted fabric described in Patent Document 1.

[0011] Furthermore, the knitted fabric described in Patent Document 2 is dense and has high air resistance, resulting in relatively high friction between the fibers. As a result, it is particularly difficult to obtain the high flexibility required for applications such as underwear and sportswear in the knitted fabric described in Patent Document 2.

[0012] In view of the problems of the prior art, the problem to be solved by the present invention is to provide knitted fabrics with excellent bending softening properties.

[0013] Solution for solving the problem

[0014] In order to solve the above problems, the inventors conducted in-depth research and repeated studies, and unexpectedly discovered that the problem could be solved by the following structure, thus completing the present invention.

[0015] [1] A knitted fabric comprising a surface knitted fabric structure, an inner knitted fabric structure, and a bonding yarn that joins the surface knitted fabric structure and the inner knitted fabric structure, wherein the surface knitted fabric structure and the inner knitted fabric structure comprise inelastic fibers, the bonding yarn comprises elastic fibers, the knitting density of the bonding yarn as 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 weaving density of the knotting yarn = (the number of loops with knotting yarn in a complete weave) / (the total number of loops in a complete weave).

[0017] [2] According to the knitted fabric described in [1], wherein the air permeability of the knitted fabric is 100 cm. 3 / cm 2 ·s and above.

[0018] [3] According to the knitted fabric of [1] or [2], the ratio of the mass of the elastic fibers contained in the knotting yarn to the mass of the non-elastic fibers contained in the knitted fabric structure on the surface or the knitted fabric structure inside is 0.02 to 0.40.

[0019] [4] According to the knitted fabric of [3], the ratio of the mass of the elastic fibers contained in the knotting yarn to the mass of the non-elastic fibers contained in the knitted fabric structure on the surface or the knitted fabric structure inside is 0.02 to 0.16.

[0020] [5] According to the knitted fabric of [3] or [4], the ratio of the fineness of the elastic fibers contained in the knotting yarn to the fineness of the non-elastic fibers contained in the knitted fabric structure on the surface or the knitted fabric structure inside is 0.12 to 0.78.

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

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

[0023] [8] The knitted fabric according to any one of [1] to [7], wherein the knotting yarns are used to connect the surface knitted fabric structure and the inner knitted fabric structure only by means of a tuck stitch.

[0024] [9] The knitted fabric according to any one of [1] to [8], wherein the knitting density of the knotting 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 fineness of the elastic fiber is 50 dtex or less.

[0027]

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

[11] , wherein the fineness of the non-elastic fiber is 150 dtex or less.

[0028]

[13] According to the knitted fabric described in [4], the surface knitted fabric structure and the inner knitted fabric structure are composed only of inelastic fibers, the knotting yarn is composed only of elastic fibers, and the knotting yarn connects the surface knitted fabric structure and the inner knitted fabric structure only through a tucked structure.

[0029]

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

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

[0030] The effects of the invention

[0031] The knitted fabric of the present invention is a knitted fabric with excellent bending softening properties. Attached Figure Description

[0032] Figure 1 These are knitting pattern diagrams of the knitted fabrics from Examples 1 to 4.

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

[0034] Figure 3 This is an example of a cross-section of the knitted fabric in this embodiment. Detailed Implementation

[0035] The embodiments of the present invention will be described in detail below.

[0036] This embodiment provides a knitted fabric comprising a surface knitted fabric structure, an inner knitted fabric structure, and a bonding yarn that joins the surface knitted fabric structure and the inner knitted fabric structure. The surface knitted fabric structure and the inner knitted fabric structure contain inelastic fibers, the bonding yarn contains elastic fibers, the knitting density of the bonding yarn is defined as 1 / 3 or higher, and the air permeability of the knitted fabric is 70 cm². 3 / cm 2 •s and above:

[0037] The weaving density of the knotting yarn = (the number of loops with knotting yarn in a complete weave) / (the total number of loops in a complete weave).

[0038] The knitted fabric in this embodiment can be either weft-knitted or warp-knitted, but weft-knitted is preferred. In addition, it is preferable to manufacture the knitted fabric of this embodiment using a double-sided circular knitting machine.

[0039] The knitted fabric of this embodiment includes a surface knitted fabric structure and an inner knitted fabric structure. Both the surface and inner knitted fabric structures contain inelastic fibers, and may also contain elastic fibers, but preferably consist only of inelastic fibers. In this specification, "inelastic fiber" refers to a fiber with a maximum elongation of less than 100%, and "elastic fiber" refers to a fiber with a maximum elongation of 100% or more. For the inelastic fibers contained in the surface and inner knitted fabric structures, natural fibers, chemical fibers, etc., can be used, without particular limitation. Examples of natural fibers include cotton, linen, silk, and wool. Examples of chemical fibers include polyester fibers such as polyethylene terephthalate and polypropylene terephthalate, polyamide fibers such as nylon 6 and nylon 66, synthetic fibers, cupro fibers, and regenerated cellulose fibers such as Tencel. Yarns such as bright yarn, semi-dull yarn, and fully dull yarn can be arbitrarily selected, and the cross-sectional shape of the fibers can be any shape such as round, elliptical, W-shaped, cocoon-shaped, or hollow fiber. There are no particular limitations on the form of the fiber; it can be raw yarn, false twist, or other shredded yarn. From the viewpoint of flexibility, raw yarn is preferred. Furthermore, these non-elastic fibers can be based on interlaced or twisted composite fibers. From the viewpoint of flexibility in knitted fabrics, the fineness of the non-elastic fibers is preferably 150 dtex or less.

[0040] The knitted fabric of this embodiment includes a connecting yarn that connects the surface knitted fabric structure and the inner knitted fabric structure. The connecting yarn includes elastic fibers and may also be a composite yarn such as a covered yarn containing non-elastic fibers, but it is preferably composed only of elastic fibers. There are no particular limitations on the composition and manufacturing method of the elastic fibers included in the connecting yarn. They can be polyurethane-based or polyester-based elastic fibers and can be manufactured by known spinning methods. For example, as polyurethane-based elastic fibers, polyurethane-based elastic fibers manufactured by melt spinning, dry spinning, or wet spinning can be used. The elastic fiber is preferably a fiber whose elasticity is not damaged when the typical processing temperature during the final setting process in the dyeing process is around 140 to 170°C. In addition, as elastic fibers, elastic fibers that are endowed with high settling properties, antibacterial properties, moisture absorption, and water absorption functions by adding special polymers or powders can also be used. From the viewpoint of the bending softening of the knitted fabric, the fineness of the elastic fiber is preferably 50 dtex or less, and more preferably 17 to 44 dtex.

[0041] In this embodiment, the knitting density of the knotting yarn in the knitted fabric, as defined by the following formula, is 1 / 3 or higher:

[0042] The weaving density of the knotting yarn = (the number of loops with knotting yarn in a complete weave) / (the total number of loops in a complete weave).

[0043] Here, a complete structure refers to the smallest repeating unit of the knitted structure that constitutes a knitted fabric. For example, in Figure 1 In the case of the weave diagram, the total number of loop rows in a complete weave is 2 loop rows, and the number of loop rows with knotted yarns in a complete weave is 2 loop rows. Therefore, the weave density of the knotted yarns is 1 / 1. Figure 2 In the case of a knitted fabric structure diagram, the total number of loop rows in a complete structure is 8 loop rows, and the number of loop rows in a complete structure that incorporates the knotting yarn is 2 loop rows. Therefore, the knitting density of the knotting yarn is 1 / 4. Since the knitting density of the knotting yarn is 1 / 3 or more, the degree of freedom of the loops of the inelastic fibers constituting the inner and outer knitted fabric structures is reduced due to the knotting yarn. As a result, the thickness of the knitted fabric is reduced, and the effect of softening the knitted fabric during bending can be achieved. From the viewpoint of the softening effect of the knitted fabric, the knitting density of the knotting yarn is preferably 1 / 2 or more, and most preferably 1 / 1. A knitting density of 1 / 1 for the knotting yarn means that the knotting yarn is included in all loop rows.

[0044] The air permeability of the knitted fabric in this embodiment, based on the JIS-L1096-A method (Fraser method), is 70 cm. 3 / cm 2 •s or more, preferably 100cm 3 / cm 2•s or more, preferably 120cm 3 / cm 2 •s or more. If the air permeability is 70cm 3 / cm 2 When the air permeability is above 60 cm, the knitted fabric becomes a moderately sparse structure, thus reducing friction between fibers and allowing the fabric to soften and bend. To achieve an air permeability of 70 cm... 3 / cm 2 For fabrics with a density of ·s or higher, it is preferable to design the knitted fabric in a manner that does not increase friction between fibers, such as: 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, the binding yarn connects the surface knitted fabric structure and the inner knitted fabric structure only through a tuck structure, and the fineness of the elastic fibers contained in the binding yarn is 50 dtex or less, or the fineness of the non-elastic fibers contained in the surface knitted fabric structure and the inner knitted fabric structure is 150 dtex or less, etc.

[0045] In the knitted fabric of this embodiment, the thickness of the loop rows containing the knotting yarns is preferably 1.00 mm or less. If the thickness of the knitted fabric is 1.00 mm or less, the knitted fabric will soften when bent.

[0046] In the knitted fabric of this embodiment, the ratio of the mass of the elastic fibers contained in the knotting yarn to the mass of the non-elastic fibers contained in the surface or inner 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 less than 0.16, the surface and inner knitted fabric structures become similar in thickness due to the elasticity of the elastic fibers contained in the knotting yarn, resulting in a softened and flexible fabric. If the ratio is 0.02 or more, the elastic fibers contained in the knotting yarn can adequately withstand the mass of the non-elastic fibers, making yarn breakage less likely. To achieve a ratio of 0.02 to 0.16, it is preferable that the ratio of the fineness of the elastic fibers contained in the knotting yarn to the fineness of the non-elastic fibers contained in the surface knitted fabric or the inner knitted fabric is 0.12 to 0.78, or that the ratio of the length of the elastic fibers contained in the knotting yarn to the length of the non-elastic fibers contained in the surface knitted fabric or the inner knitted fabric is 0.35 or less.

[0047] Example

[0048] The present invention will be described in more detail below through examples and comparative examples. However, the present invention is not limited to these examples.

[0049] First, the measurement methods for various physical properties used in the embodiments and comparative examples will be explained.

[0050] (1) Weight per unit area (g / m²) 2 )

[0051] A 10cm x 10cm sample was cut from the knitted fabric that had been conditioned for one day at 20℃ and 65% RH. The weight was measured in grams using a precision balance, multiplied by 100, and converted to g / m³. 2 Calculate the weight per unit area of ​​the knitted fabric.

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

[0053] The amount of air passing through the test piece per unit area and per unit time was determined by measuring according to the JIS-L1096-A method (Fraser method).

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

[0055] An observation sample was prepared by cutting the knitted fabric along the weft direction in the loop row containing the knotting yarn. The observation sample, in its unstretched state, was attached and fixed to a platform using double-sided tape. Then, a cross-section of the loop row containing the knotting yarn was photographed from the knitting end side using a microscope (Keyence VHX-6000). In the captured images, as shown... Figure 3 In this way, two straight lines are drawn so that the lines where the vertices of the surface knitted fabric meet and the lines where the vertices of the inner knitted fabric meet are parallel. The distance between these two lines is taken as the thickness of the knitted fabric.

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

[0057] Measurements were performed using a KES-FE2-AUTO-A automatic pure bending tester manufactured by KATO TECH Co., Ltd. A knitted fabric cut to a width of 20.0 cm × a length of 20.0 cm was used as the test piece. The test piece was placed on the test stage with the warp-side cut portion of the knitted fabric located on the inside of the test stage. The test piece was inserted inwards until the test piece insertion confirmation light illuminated, and the bending stiffness of the knitted fabric in the weft direction (the stiffness of the knitted fabric when bent in a way that creates a crease in the warp direction) was measured. In this embodiment, although the measurement sensitivity was set to 4.0 gf·cm / 10V, it can be appropriately adjusted within the range of 4.0 to 50.0 gf·cm / 10V, depending on the magnitude of the bending stiffness of the test piece. In the tester, the bending stiffness when the knitted fabric bends upwards and the bending stiffness when it bends downwards were measured, and the average value was used. Three test pieces were tested, and their average value was calculated. In the tester, the unit is gf·cm. 2The output is / cm, therefore, multiply it by 0.980665 to convert it to cN·cm. 2 / cm.

[0058] The smaller the bending stiffness value, the better the softening property of the knitted fabric. In this embodiment, if the bending stiffness is 0.0180 cN·cm... 2 If the value is below 0.0100 cN·cm, it is considered flexible and soft. Furthermore, if it is below 0.0100 cN·cm... 2 If the value is below / cm, it is considered to have excellent bending softening properties.

[0059] (5) The ratio of the mass of elastic fibers contained in the knitting yarn to the mass of non-elastic fibers contained in the surface knitted fabric or the inner knitted fabric (in the table, denoted as "mass ratio").

[0060] Cut a knitted fabric with one row of loops x 100 rows of loops from a knitted fabric that has been conditioned for one day at 20°C and 65% RH. Extract the inelastic fibers from the surface knitted fabric, the inelastic fibers from the inner knitted fabric, and the elastic fibers from the binding yarn. Measure the mass of each fiber using a precision balance. Define the larger of the masses of the inelastic fibers from the surface and inner knitted fabrics as W1 (g), and the mass of the elastic fibers from the binding yarn as W2 (g). Calculate the ratio W2 / W1, and set this ratio as the ratio of the mass of the elastic fibers from the binding yarn to the mass of the inelastic fibers from either the surface or inner knitted fabric.

[0061] (6) The ratio of the fineness of the elastic fibers contained in the knitting yarn to the fineness of the non-elastic fibers contained in the surface knitted fabric or the inner knitted fabric (denoted as "fineness ratio" in the table).

[0062] A load of assumed fineness (dtex) × 0.09 g is applied to measure the fineness of the inelastic fibers contained in the surface knitted fabric and the inelastic fibers contained in the inner knitted fabric in step (5). The larger fineness is designated as F1 (dtex). The fineness of the elastic fibers contained in the knotting yarn under no-load conditions is designated as F2 (dtex). The ratio of F2 to F1, F2 / F1, is calculated and used as the ratio of the fineness of the elastic fibers contained in the knotting yarn to the fineness of the inelastic fibers contained in the surface knitted fabric or the inner knitted fabric.

[0063] (7) The ratio of the length of the elastic fibers contained in the knotted yarn to the length of the non-elastic fibers contained in the surface knitted fabric or the inner knitted fabric (in the table, it is denoted as "yarn length ratio").

[0064] A load of assumed fineness (dtex) × 0.09 g was applied to measure the lengths of the inelastic fibers contained in the surface knitted fabric and the inelastic fibers contained in the inner knitted fabric in step (5). The longer one was designated as L1 (mm). The length of the elastic fibers contained in the knotting yarn under no-load conditions was designated as L2 (mm). The ratio of L2 to L1, L2 / L1, was calculated and used as the ratio of the length of the elastic fibers contained in the knotting yarn to the length of the inelastic fibers contained in either the surface knitted fabric or the inner knitted fabric.

[0065] [Example 1]

[0066] Using a two-sided circular knitting machine with a gauge of 40, such as Figure 1 As shown in the knitting diagram, nylon (denoted as "Ny" in the table) 33 tex 6 filaments are supplied from yarn feeders F1 and F4 to form a plain knit structure as the surface knitted fabric. Cotton (denoted as "Co" in the table) 120 tex is supplied from yarn feeders F2 and F5 to form a plain knit structure as the inner knitted fabric. Polyurethane (denoted as "Pu" in the table) 22 tex is supplied from yarn feeders F3 and F6 to form a tuck knit structure as the binding yarn, thus knitting a greige fabric. After the knitted greige 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 is reactive dyed and the nylon is acid dyed using a liquid dyeing machine, and the final setting is performed at 160°C for 1 minute to obtain the 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 unit area weight is 105 g / m². 2 It has a thickness of 0.66mm and an air permeability of 255cm. 3 / cm 2 The bending stiffness is 0.0031 cN·cm. 2 / cm. The results are shown in Table 1 below.

[0067] [Example 2]

[0068] Using a two-sided circular knitting machine with a gauge of 40, such as Figure 1As shown in the knitting diagram, nylon 33 dtex 6 filaments are supplied from yarn feeders F1 and F4 to form a plain knit structure as the surface knitted fabric. Cationic dyeable polyester (denoted as "CDPe" in the table) 33 dtex 36 filaments are supplied from yarn feeders F2 and F5 to form a plain knit structure as the inner knitted fabric. Polyurethane 22 dtex is supplied from yarn feeders F3 and F6 to form a tuck knit structure as the binding yarn, thus knitting the fabric into a greige fabric. After relaxing and refining the knitted fabric using a continuous water-based relaxation / refining machine, it is pre-set at 185°C for 1 minute. The cationic dyeable polyester is cationically dyed, and the nylon is acidically dyed using a liquid dyeing machine. The final setting is performed at 160°C for 1 minute to obtain the knitted fabric. In the obtained knitted fabric, the weight ratio of nylon yarn is 46%, the weight ratio of cationic dyeable polyester yarn is 45%, the weight ratio of polyurethane yarn is 9%, and the unit area weight is 87 g / m². 2 It has a thickness of 0.55mm and an air permeability of 453cm. 3 / cm 2 The bending stiffness is 0.0016 cN·cm. 2 / cm. The results are shown in Table 1 below.

[0069] [Example 3]

[0070] Using a two-sided circular knitting machine with a size of 28, such as Figure 1 As shown in the knitting diagram, cotton 80 / - is supplied from yarn feeders F1 and F4 to form a plain knit structure as the surface knitted fabric. Cupro fiber (denoted as "Cu" in the table) short fibers 60 / - are supplied from yarn feeders F2 and F5 to form a plain knit structure as the inner knitted fabric. Polyurethane 33 dtex is supplied from yarn feeders F3 and F6 to form a tuck knit structure as the binding yarn, thus knitting the fabric into a greige fabric. After the woven greige 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 cupro fibers are then react-dyed using a liquid dyeing machine, and finally set at 160°C for 1 minute. In the resulting knitted fabric, the weight ratio of cupro fiber yarn is 52%, the weight ratio of cotton yarn is 40%, the weight ratio of polyurethane yarn is 8%, and the unit area weight is 173 g / m². 2 It has a thickness of 0.82mm and an air permeability of 144cm. 3 / cm 2 The bending stiffness is 0.0076 cN·cm. 2 / cm. The results are shown in Table 1 below.

[0071] [Example 4]

[0072] The fabric was woven by increasing the supply of elastic fibers to a length that was 1.6 times that of the knotting yarn. Otherwise, a knitted fabric was produced in the same manner as in Example 3. In the resulting knitted fabric, the weight percentage of cupro fiber yarn was 50%, the weight percentage of cotton yarn was 38%, the weight percentage of polyurethane yarn was 12%, and the area weight was 181 g / m². 2 It has a thickness of 1.23mm and a breathability of 138cm. 3 / cm 2 / sec, bending stiffness is 0.0130 cN·cm 2 / cm. The results are shown in Table 1 below.

[0073] [Comparative Example 1]

[0074] Using a two-sided circular knitting machine with a size of 26, such as Figure 2 As shown in the knitting diagram, polyester (denoted as "Pe" in the table) false-twist yarn of 72 dtex and 72 filament is supplied from yarn feeders F1, F4, F6, F8, F10, F13, F15, and F17 to form a plain knit structure as the surface knitted fabric. Polyester false-twist yarn of 72 dtex and 72 filament is supplied from yarn feeders F2, F5, F7, F9, F11, F14, F16, and F18 to form a plain knit structure as the inner knitted fabric. Polyurethane 78 dtex is supplied from yarn feeders F3 and F12 to form a tucked structure as the binding yarn, thus knitting a greige fabric. After relaxing and refining the knitted greige fabric using a continuous water-based relaxation / refining machine, it is pre-set at 185°C for 1 minute. The polyester is then disperse-dyed using a liquid dyeing machine, and finally set at 160°C for 1 minute to obtain the knitted fabric. In the resulting knitted fabric, the polyester yarn weight ratio was 90%, the polyurethane yarn weight ratio was 10%, and the unit area weight was 179 g / m². 2 It has a thickness of 1.81mm and a breathability of 55cm. 3 / cm 2 The bending stiffness is 0.1057 cN·cm. 2 / cm. The results are shown in Table 1 below.

[0075] [Comparative Example 2]

[0076] Using two circular knitting machines of size 28, 84 dtex 72 filament polyester false twist yarn and 84 dtex 36 filament cationic dyeable polyester false twist yarn were fed in a 20:4 interlacing ratio to form a plain knit structure as the surface knitted fabric. Cationic dyeable polyester false twist yarn was also fed in a plain knit structure as the inner knitted fabric, and 78 dtex polyurethane yarn was fed in a tuck knit structure as the binding yarn, thus knitting a greige fabric. After relaxing and refining the knitted fabric using a continuous water-based relaxation / refining machine, it was pre-set at 185°C for 1 minute. The cationic dyeable polyester was then cationically dyed using a liquid dyeing machine, and finally set at 160°C for 1 minute to obtain the knitted fabric. In the obtained knitted fabric, the weight of cationic dyeable polyester yarn was 53%, the weight of polyester yarn was 38%, the weight of polyurethane yarn was 9%, and the weight per unit area was 164 g / m². 2 It has a thickness of 1.45mm and a breathability of 147cm. 3 / cm 2 The bending stiffness is 0.0394 cN·cm. 2 / cm. The results are shown in Table 1 below.

[0077] [Comparative Example 3]

[0078] Using a two-sided circular knitting machine with a gauge of 40, such as Figure 1 As shown in the diagram, nylon 22-dtex filament and polyurethane 22-dtex are fed through yarn feeders F1 and F4 to form a bare spandex plain knit structure as the surface knitted fabric. Cationic dyeable polyester 22-dtex filament and polyurethane 22-dtex are fed through yarn feeders F2 and F5 to form a bare spandex plain knit structure as the inner knitted fabric. Polyurethane 17-dtex is fed through yarn feeders F3 and F6 to form a tucked structure as the binding yarn, thus knitting the greige fabric. After relaxing and refining the knitted greige fabric using a continuous water-based relaxation / refining machine, it is pre-set at 185°C for 1 minute. The cationic dyeable polyester is cationically dyed and the nylon is acidically dyed using a liquid dyeing machine, and the final setting is performed at 160°C for 1 minute to obtain the knitted fabric. In the resulting knitted fabric, the weight percentage of nylon yarn was 34%, the weight percentage of cationic dyeable polyester yarn was 34%, and the weight percentage of polyurethane yarn was 32%, with a unit area weight of 151 g / m². 2 It has a thickness of 0.42mm and an air permeability of 51cm. 3 / cm 2 The bending stiffness is 0.0192 cN·cm. 2 / cm. The results are shown in Table 1 below.

[0079] [Comparative Example 4]

[0080] Using a two-sided circular knitting machine of size 18, such as Figure 1 As shown in the diagram, cotton 30 / - is supplied from yarn feeders F1 and F4 to form a plain knit structure as the surface knitted fabric. Polyester 167 dtex 144 filament is supplied from yarn feeders F2 and F5 to form a plain knit structure as the inner knitted fabric. Polyester false twist yarn 56 dtex 24 filament is supplied from yarn feeders F3 and F6 to form a tucked structure as the binding yarn, thus weaving a greige fabric. After relaxing and refining the woven greige fabric using a continuous water-based relaxation / refining machine, it is pre-set at 185°C for 1 minute. The cotton is then reactive-dyed and the polyester is disperse-dyed using a liquid dyeing machine, and finally set at 160°C for 1 minute to obtain the knitted fabric. In the obtained knitted fabric, the polyester yarn weight ratio is 60%, the cotton yarn weight ratio is 40%, and the unit area weight is 286 g / m². 2 It has a thickness of 1.09mm and a breathability of 87cm. 3 / cm 2 The bending stiffness is 0.1405 cN·cm. 2 / cm. The results are shown in Table 1 below.

[0081] [Table 1]

[0082]

[0083] Industrial availability

[0084] The knitted fabrics of the present invention have bending softening properties, and therefore can be better used in outerwear, underwear and sportswear.

[0085] Explanation of reference numerals in the attached figures

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

Claims

1. A knitted fabric comprising a surface knitted structure, an inner knitted structure, and a bonding yarn connecting the surface knitted structure and the inner knitted structure, wherein, The knitted fabric on the surface and the knitted fabric inside are composed only of inelastic fibers, the knotting yarn contains elastic fibers, the knitting density of the knotting yarn as defined by the following formula is 1 / 3 or more, and the air permeability of the knitted fabric is 70cm. 3 / cm 2 •s and above: The knitting density of the knotting yarn = (number of loop rows with knotting yarn in one complete weave) / (total number of loop rows in one complete weave), and, The ratio of the mass of the elastic fibers contained in the knotting yarn to the mass of the non-elastic fibers contained in the surface knitted fabric or the inner knitted fabric is 0.02 to 0.40, and... The fineness of the non-elastic fiber is below 150 dtex.

2. The knitted fabric according to claim 1, wherein, The breathability of knitted fabric is 100cm. 3 / cm 2 ·s and above.

3. The knitted fabric according to claim 1 or 2, wherein, The ratio of the mass of the elastic fibers contained in the knotting yarn to the mass of the non-elastic fibers contained in the knitted fabric on the surface or the knitted fabric inside is 0.02 to 0.

16.

4. The knitted fabric according to claim 1 or 2, wherein, The ratio of the fineness of the elastic fibers contained in the knotting yarn to the fineness of the non-elastic fibers contained in the knitted fabric on the surface or the knitted fabric inside is 0.12 to 0.

78.

5. The knitted fabric according to claim 1 or 2, wherein, The bonding yarn is composed only of elastic fibers.

6. The knitted fabric according to claim 1 or 2, wherein, The joining yarn connects the surface knitted fabric and the inner knitted fabric only through a tuck stitch weave.

7. The knitted fabric according to claim 1 or 2, wherein, The weaving density of the knotting yarn is 1 / 1.

8. The knitted fabric according to claim 1 or 2, wherein, The thickness of the knitted fabric is less than 1.00 mm.

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

10. The knitted fabric according to claim 3, wherein, The bonding yarn is composed of only elastic fibers, and the bonding yarn connects the surface knitted fabric and the inner knitted fabric only through a tuck weave.

11. The knitted fabric according to claim 1 or 2, wherein, This knitted fabric is a weft-knitted fabric.

12. The knitted fabric according to claim 1, wherein, The ratio of the length of the elastic fibers contained in the knotting yarn to the length of the non-elastic fibers contained in the knitted fabric on the surface or inside is 0.35 or less.

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