Knitted denim fabric, preparation method and clothing

Abstract

The present invention belongs to the field of textile technology and discloses a knitted denim fabric, a preparation method and clothing. The knitted denim fabric of the present invention includes a first yarn, a second yarn and a third yarn. The first yarn includes a core yarn and a covering yarn. The core yarn includes spandex, the covering yarn includes seaweed fiber and cooling fiber, the second yarn includes high shrinkage fiber, the second yarn is knitted with the first yarn in the form of a plating yarn, and the second yarn is located on the reverse side of the first yarn. The coil includes a normal loop coil and an elongated loop coil. The third yarn is knitted in the next horizontal row of the normal loop coil, and the rest of the position is located on the reverse side of the knitted denim fabric in the form of a floating thread. The knitted denim fabric provided by the present invention has better stiffness and good perspiration and antibacterial effects on the basis of maintaining the original high elasticity of knitting, thereby improving wearing comfort and being particularly suitable for wearing in summer.

Description

Technical Field

[0001] The present invention belongs to the technical field of textiles, and in particular relates to a knitted denim fabric, a preparation method and clothing. Background Art

[0002] Traditional summer knitted denim fabrics have two major problems. First, in order to have better rebound performance, most fabrics are added with spandex to reduce light transmittance. However, the addition of spandex will reduce the stiffness of the entire fabric, affecting the rough style of the denim itself; second, denim jackets or jeans should not be washed frequently. However, the human body perspires a lot in summer, and if they are not washed frequently, bacteria will breed. Traditional summer knitted denim fabrics lack relevant functional designs. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the above-mentioned prior art. To this end, the present invention provides a knitted denim fabric, a preparation method, and a garment. The knitted denim fabric, while maintaining the original high elasticity of knitted fabric, has improved stiffness and width, as well as good perspiration and antibacterial effects.

[0004] According to a first aspect of the present invention, a knitted denim fabric is provided, comprising a first yarn, a second yarn, and a third yarn, wherein the first yarn comprises a core yarn and a covering yarn, the core yarn comprises spandex, the covering yarn comprises seaweed fiber and cool fiber, the second yarn comprises high-shrinkage fiber, the second yarn is synchronously woven with the first yarn in the form of a plating yarn, the second yarn is located on the reverse side of the first yarn, the coil comprises a normal loop coil and an elongated coil, the third yarn is woven into a loop in the next horizontal row of the normal loop coil, the third yarn forms a floating line on the reverse side of the elongated coil, and the elongated coil forms an inclined pattern on the surface of the knitted denim fabric.

[0005] Specifically, the seaweed fiber in the present invention has good moisture absorption properties, can absorb sweat discharged by the human body, and has good antibacterial effect; the cool fiber refers to a fiber with a cool touch feeling prepared by a physical blending spinning method, in which a high molecular polymer and minerals or plant extracts with good thermal conductivity are evenly mixed, and is suitable for summer fabrics.

[0006] It is understood that the first yarn knitted fabric of the present invention has the technical side as the front, but during wear, in order to achieve a good twill effect, the technical side is used as the front side of the garment, and the technical side is used as the back side of the garment. Therefore, the first yarn knitted front side is used as the back side when worn, and is worn against the human skin. The coating yarn of the first yarn includes seaweed fiber and cooling fiber, which can improve the comfort of the garment.

[0007] The high-shrinkage fiber in the present invention refers to a fiber with a shrinkage rate of ≥30% after being washed with water at high temperature (100-180°C). Common high-shrinkage acrylic fibers (polyacrylonitrile fibers) and polyester fibers are included. The present invention introduces high-shrinkage fibers into the second yarn. After washing and finishing, the second yarn will shrink, making the fabric tighter. After shrinkage, the second yarn has good elasticity, but this elasticity is different from the elasticity of spandex. Spandex is soft elastic, that is, a small force will produce a large deformation; while the second yarn containing high-shrinkage fibers is hard elastic, that is, a large force is required to produce a small deformation. The present invention reduces the soft elastic force formed by the first yarn through the hard elastic force formed by the second yarn, thereby improving the dimensional stability and width of the fabric while ensuring good fabric elasticity. At the same time, the shrinkage of the second yarn will cause the yarn diameter to increase, which can be more conducive to achieving coverage of the first yarn and ensuring that the knitted denim fabric is not exposed.

[0008] In some embodiments of the present invention, the spandex accounts for 5-25% by mass of the first yarn.

[0009] In some embodiments of the present invention, the mass percentage of the seaweed fiber in the first yarn is 10-30%, preferably 10-15%.

[0010] In some embodiments of the present invention, the cooling fiber accounts for 40-80% by mass of the first yarn, preferably 40-60% by mass.

[0011] In some embodiments of the present invention, the cooling fiber includes at least one of mica fiber, jade cooling fiber, pearl fiber and mint fiber.

[0012] In some embodiments of the present invention, the covered yarn further comprises regenerated cellulose fibers.

[0013] In some embodiments of the present invention, the regenerated cellulose fiber is antimicrobial-modified regenerated cellulose fiber. Antimicrobial-modified regenerated cellulose fiber refers to a fiber that has been treated with conventional antimicrobial finishing during the fiber forming or finishing process to impart an antimicrobial effect. Conventional antimicrobial modification methods include the addition of Ag, Cu, or Zn nanopowders or ions, or the addition of antimicrobial extracts from plants such as coral grass, mint, and aloe vera. The regenerated cellulose fiber used in the present invention has excellent moisture absorption properties and can further improve the comfort of the fabric. The use of antimicrobial-modified regenerated cellulose fiber can also enhance the antimicrobial effect of denim fabrics.

[0014] In some embodiments of the present invention, the regenerated cellulose fiber accounts for 20-40% by weight of the first yarn.

[0015] In some embodiments of the present invention, the high-shrinkage fiber accounts for 20-45% by weight of the second yarn. When the high-shrinkage fiber content is less than 20%, sufficient shrinkage is difficult to provide; when the content is greater than 45%, the yarn shrinks excessively, resulting in excessive bulkiness, which affects the wear resistance and practical performance of the fabric.

[0016] In some embodiments of the present invention, the second yarn further comprises low-melting-point fibers, and the mass percentage of the low-melting-point fibers in the second yarn is 2-5%.

[0017] The low-melting-point fiber used in the present invention refers to a modified fiber formed by a two-component composite spinning technology. The structure is generally a sheath / core type. It consists of a sheath polymer and an inner core polymer. The melting point of the sheath polymer is lower than the melting point of the inner core polymer. When the temperature is higher than the melting point of the sheath polymer and lower than the melting point of the inner core polymer, the sheath polymer melts and acts as a glue, while the inner core polymer does not melt and acts as a skeleton. In addition, the low-melting-point fiber can also be a parallel structure, that is, one side of the fiber cross section is a component with a lower melting point and the other side is a component with a higher melting point. The preferred low-melting-point fiber is the 4080 low-melting-point fiber with a sheath / core structure. In the knitted denim fabric prepared by the present invention, during the fabric setting process, the setting temperature is higher than the melting point of the component with a lower melting point in the low-melting-point fiber and lower than the melting point of the component with a higher melting point. The present invention uses low-melting-point fiber to make the entire fabric stiffer by gluing the components with low melting points.

[0018] In addition, the present invention adjusts the content of low-melting-point fiber to achieve both excellent elasticity and stiffness; a content of less than 2% does not significantly improve the stiffness of the fabric, and a content of more than 5% reduces the elasticity of the fabric.

[0019] In some embodiments of the present invention, the second yarn further comprises moisture wicking fibers or cotton fibers.

[0020] The present invention utilizes moisture-wicking fibers, which utilize the capillary action of fine grooves on their fiber surfaces to rapidly transfer sweat absorbed by the inner layer formed by the first yarn to the surface of the fabric and dissipate it through wicking, diffusion, and transmission. This ensures that the skin remains dry and refreshed even after perspiration, thereby achieving the purpose of moisture conduction and quick drying. Sweat absorbed by the seaweed fibers in the first yarn is unidirectionally channeled and expelled from the body through the moisture-wicking fibers in the second yarn, thus avoiding the problem of excessive moisture absorption by the seaweed fibers, which makes it difficult for sweat to be expelled, resulting in damp, cold, and uncomfortable fabrics.

[0021] In some embodiments of the present invention, the moisture-wicking fibers include coolmax fibers and / or coolplus fibers.

[0022] In some embodiments of the present invention, the moisture wicking fibers account for 40-60% by weight of the second yarn.

[0023] In some embodiments of the present invention, the second yarn is a yarn produced by vortex spinning or siro spinning.

[0024] The vortex spinning described in this invention utilizes a free-end twisting technology. Due to its bundled yarn-forming principle, vortex spinning produces yarns with minimal floating fibers exposed on the yarn surface, resulting in a yarn finish comparable to compact spinning. The fabric also exhibits exceptional pilling resistance. Furthermore, vortex spinning utilizes false twist, which results in the yarn having no actual twist. The resulting knitted fabric exhibits virtually no weft skew and excellent dimensional stability.

[0025] In some embodiments of the present invention, the siro spinning adopts compact siro spinning; the yarn made by compact siro spinning has less hairiness, and the fabric has good anti-pilling effect. In addition, because the fibers are tightly bonded, the yarn feels harder, which is beneficial to improving the stiffness and width performance of the denim fabric.

[0026] The present invention adopts yarn made by vortex spinning or siro spinning as the second yarn, which can effectively improve the anti-pilling effect of the denim fabric and enhance the straightness and width performance of the fabric.

[0027] In some embodiments of the present invention, the third yarn comprises polyester high-stretch yarn (polytrimethylene terephthalate). Polyester high-stretch yarn has a high initial modulus and good elasticity, which can further enhance the elasticity and stiffness of the fabric. Polyester high-stretch yarn also has greater strength and elongation, providing better wear resistance.

[0028] In some embodiments of the present invention, the linear density of the third yarn is 150-200D.

[0029] In some embodiments of the present invention, the linear density of the third yarn is 1.1-1.5 times that of the second yarn; at this ratio, the floating line of the third yarn can better cover the elongated coil, forming a clearer twill texture color, achieving an imitation machine-made style.

[0030] In a second aspect of the present invention, there is provided a method for preparing the knitted denim fabric according to the first aspect of the present invention, comprising the following steps:

[0031] The first yarn, the second yarn and the third yarn are placed on a circular knitting machine for knitting. The knitting structure is a cycle of 6 routes, wherein the third yarn is inserted into the 1st, 3rd and 5th routes, the first yarn is inserted into the 2nd, 4th and 6th routes, and the second yarn is added by adding yarn to produce a knitted denim fabric.

[0032] In some embodiments of the present invention, in the method for preparing the knitted denim fabric, the yarn length of the first yarn and / or the second yarn is 21-26 cm per 100 stitches, and the yarn length of the third yarn is 11-12 cm per 100 stitches.

[0033] In some embodiments of the present invention, in the method for preparing the knitted denim fabric, the weaving tension of the first yarn and / or the second yarn is 3-5 cN, and the weaving tension of the third yarn is 2-3 cN.

[0034] In some embodiments of the present invention, in the method for preparing the knitted denim fabric, the circular knitting machine is a 4-needle circular knitting machine, comprising two yarn storage disks, wherein the speed of one yarn storage disk is 1.8-1.9 times that of the other yarn storage disk.

[0035] In some embodiments of the present invention, the method for preparing the knitted denim fabric specifically comprises the following steps:

[0036] 1) Knitting needle arrangement:

[0037] The knitting needles include four types of needles: high, medium, medium-low, and low, which are numbered A, B, C, and D. Six knitting needles are used to arrange a pattern structure cycle. The six knitting needles are arranged in the order of DC, B, C, and C, and a basic cycle sequence is formed. That is, N knitting needles are arranged in the order of M, and a cycle sequence is formed to arrange the needle holes; wherein N is 6n, M is n DC, B, C, and C arranged in sequence, and n is a positive integer;

[0038] The knitting needles required for the remaining needle holes are also arranged in M ​​order until all the needle holes are arranged, and then a needle position is left vacant and placed on the side of the cloth winding rack for use as a planer line.

[0039] 2) Triangle on the machine:

[0040] Using 6-way weaving, a cycle is formed by 1, 2, 3, 4, 5 and 6 ways;

[0041] The knitting needle triangles A, B, C, and D corresponding to the 2nd, 4th, and 6th threads are all fully engaged, and all the needles participate in the knitting;

[0042] The A and D knitting needle triangles of the first route are all out, and the A and D knitting needles participate in the knitting; the B and C knitting needle triangles are floating triangles, and the B and C knitting needles do not participate in the knitting;

[0043] The knitting needle triangle of No. C in the third route is fully out, and the knitting needle of No. C participates in knitting; the knitting needle triangles of No. A, B, and D are floating triangles, and the knitting needles of No. A, B, and D do not participate in knitting;

[0044] The knitting needle triangle of No. B in route 5 is fully out, and the knitting needle of No. B participates in knitting; the knitting needle triangles of No. A, C, and D are floating triangles, and the knitting needles of No. A, C, and D do not participate in knitting;

[0045] 3) Yarn arrangement:

[0046] The 1st, 3rd and 5th routes all wear the third yarn, the 2nd, 4th and 6th routes all wear the first yarn and add the second yarn in the plating manner.

[0047] The third aspect of the present invention provides a garment comprising the knitted denim fabric of the first aspect of the present invention. Since the garment adopts all the technical solutions of the knitted denim fabric, it has at least all the beneficial effects brought by the technical solutions of the above embodiments.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] The knitted denim fabric provided by the present invention adopts a core-spun yarn method to cover the spandex on the first yarn, which can reduce the problem of the spandex itself being easily broken due to its poor friction resistance. At the same time, the seaweed fiber, the cooling fiber and the high-shrinkage fiber of the second yarn are combined, so that the fabric has better stiffness and good perspiration and antibacterial effects on the basis of maintaining the original high-elasticity of the knitted fabric, thereby improving wearing comfort and being particularly suitable for wearing in summer. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 Schematic diagram of the organizational structure of the knitted denim fabric of the present invention;

[0051] Figure 2 This is a needle arrangement diagram of the knitted denim fabric of the present invention;

[0052] Figure 3 It is a triangle configuration diagram of the knitted denim fabric of the present invention.

[0053] The markings in the accompanying drawings are as follows: 1, first yarn; 2, second yarn; 3, third yarn; 4, normal loop; 5, stretched loop. DETAILED DESCRIPTION

[0054] The present invention is further described in detail below using specific examples. Unless otherwise specified, the yarns, fibers, and devices used in these examples are commercially available or can be obtained using conventional methods. Unless otherwise specified, all experimental and testing methods are conventional in the art.

[0055] Example 1

[0056] Reference Figure 1 , a knitted denim fabric, the knitted denim fabric comprising a first yarn, a second yarn and a third yarn;

[0057] The first yarn has a linear density of 15 tex and includes a core yarn and a covering yarn. The core yarn is made of spandex fiber, and the covering yarn is made of seaweed fiber, jade cool fiber (Ice Cool), and lyocell fiber (regenerated cellulose fiber). The mass percentage of each fiber in the first yarn is: 15% spandex fiber, 15% seaweed fiber, 50% jade cool fiber, and 20% lyocell fiber.

[0058] The second yarn has a linear density of 18 tex and is made of 35% wt high shrinkage polyester and 65 wt% coolplus fiber through siro spinning;

[0059] The third yarn is made of 200D polyester high elastic yarn;

[0060] The second yarn is knitted into loops synchronously with the first yarn in the form of added yarn. The second yarn is located on the reverse side of the first yarn. The loops include normal loops and stretched loops. The third yarn is knitted into loops in the next horizontal row of the normal loops. The remaining positions are located on the reverse side of the knitted denim fabric in the form of floating yarns.

[0061] Reference Figure 2 and Figure 3 The preparation method of the knitted denim fabric is as follows:

[0062] 1) Knitting needle arrangement:

[0063] The knitting needles include four types of needles: high, medium, medium-low, and low, which are numbered A, B, C, and D. Six knitting needles are used to arrange a pattern structure cycle. The six knitting needles are arranged in the order of DC, B, C, and C, and a basic cycle sequence is formed. That is, N knitting needles are arranged in the order of M, and a cycle sequence is formed to arrange the needle holes; wherein N is 6n, M is n DC, B, C, and C arranged in sequence, and n is a positive integer;

[0064] The knitting needles required for the remaining needle holes are also arranged in M ​​order until all the needle holes are arranged, and then a needle position is left vacant and placed on the side of the cloth winding rack for use as a planer line.

[0065] 2) Triangle on the machine:

[0066] Using 6-way weaving, a cycle is formed by 1, 2, 3, 4, 5 and 6 ways;

[0067] The knitting needle triangles A, B, C, and D corresponding to the 2nd, 4th, and 6th threads are all fully engaged, and all the needles participate in the knitting;

[0068] The A and D knitting needle triangles of the first route are all out, and the A and D knitting needles participate in the knitting; the B and C knitting needle triangles are floating triangles, and the B and C knitting needles do not participate in the knitting;

[0069] The knitting needle triangle of No. C in the third route is fully out, and the knitting needle of No. C participates in knitting; the knitting needle triangles of No. A, B, and D are floating triangles, and the knitting needles of No. A, B, and D do not participate in knitting;

[0070] The knitting needle triangle of No. B in route 5 is fully out, and the knitting needle of No. B participates in knitting; the knitting needle triangles of No. A, C, and D are floating triangles, and the knitting needles of No. A, C, and D do not participate in knitting;

[0071] 3) Yarn arrangement:

[0072] The third yarn is inserted into the first, third, and fifth threads, and the first yarn is inserted into the second, fourth, and sixth threads, and the second yarn is added by plating. The yarn length of the first and second yarns is 100 stitches of 24 cm, and the yarn length of the third yarn is 100 stitches of 12 cm. The spinning tension of the first and second yarns is 4 cN, and the spinning tension of the third yarn is 2 cN.

[0073] The 4-needle circular knitting machine used in this embodiment includes two yarn storage discs, wherein the speed of one yarn storage disc is 1.9 times that of the other yarn storage disc;

[0074] After weaving through the above steps and then washing, the weight is 260g / m 2 knitted denim fabric.

[0075] In this embodiment, since the second yarn contains high shrinkage polyester and coolplus, both of which are polyester, the third yarn is also polyester, which can ensure the uniformity of their dyeing colors and uniform color.

[0076] Example 2

[0077] A knitted denim fabric comprises a first yarn, a second yarn and a third yarn;

[0078] The first yarn has a linear density of 15 tex and includes a core yarn and a covering yarn. The core yarn is made of spandex fiber, and the covering yarn is made of seaweed fiber, jade cooling fiber (Ice Cool), and mint-modified regenerated cellulose fiber. The mass percentages of the fibers in the first yarn are: 15% spandex fiber, 10% seaweed fiber, 40% jade cooling fiber, and 35% mint-modified regenerated cellulose fiber.

[0079] The second yarn has a linear density of 15 tex and is made of 40% wt high shrinkage polyester, 55 wt% coolplus fiber and 5 wt% 4080 low melting point fiber through compact siro spinning;

[0080] The third yarn is made of 150D polyester high-stretch yarn;

[0081] The second yarn is knitted into loops synchronously with the first yarn in the form of added yarn. The second yarn is located on the reverse side of the first yarn. The loops include normal loops and stretched loops. The third yarn is knitted into loops in the next horizontal row of the normal loops. The remaining positions are located on the reverse side of the knitted denim fabric in the form of floating yarns.

[0082] The preparation method of the above-mentioned knitted denim fabric is as follows:

[0083] 1) Knitting needle arrangement:

[0084] The knitting needles include four types of needles: high, medium, medium-low, and low, which are numbered A, B, C, and D. Six knitting needles are used to arrange a pattern structure cycle. The six knitting needles are arranged in the order of DC, B, C, and C, and a basic cycle sequence is formed. That is, N knitting needles are arranged in the order of M, and a cycle sequence is formed to arrange the needle holes; wherein N is 6n, M is n DC, B, C, and C arranged in sequence, and n is a positive integer;

[0085] The knitting needles required for the remaining needle holes are also arranged in M ​​order until all the needle holes are arranged, and then a needle position is left vacant and placed on the side of the cloth winding rack for use as a planer line.

[0086] 2) Triangle on the machine:

[0087] Using 6-way weaving, a cycle is formed by 1, 2, 3, 4, 5 and 6 ways;

[0088] The knitting needle triangles A, B, C, and D corresponding to the 2nd, 4th, and 6th threads are all fully engaged, and all the needles participate in the knitting;

[0089] The A and D knitting needle triangles of the first route are all out, and the A and D knitting needles participate in the knitting; the B and C knitting needle triangles are floating triangles, and the B and C knitting needles do not participate in the knitting;

[0090] The knitting needle triangle of No. C in the third route is fully out, and the knitting needle of No. C participates in knitting; the knitting needle triangles of No. A, B, and D are floating triangles, and the knitting needles of No. A, B, and D do not participate in knitting;

[0091] The knitting needle triangle of No. B in route 5 is fully out, and the knitting needle of No. B participates in knitting; the knitting needle triangles of No. A, C, and D are floating triangles, and the knitting needles of No. A, C, and D do not participate in knitting;

[0092] 3) Yarn arrangement:

[0093] The third yarn is inserted into the first, third, and fifth threads, and the first yarn is inserted into the second, fourth, and sixth threads, and the second yarn is added by plating. The yarn length of the first and second yarns is 100 stitches and 21 cm, and the yarn length of the third yarn is 100 stitches and 11 cm. The spinning tension of the first and second yarns is 3 cN, and the spinning tension of the third yarn is 2 cN.

[0094] The 4-needle circular knitting machine used in this embodiment includes two yarn storage discs, wherein the speed of one yarn storage disc is 1.8 times that of the other yarn storage disc;

[0095] After weaving through the above steps and then washing, the weight is 240g / m 2 knitted denim fabric.

[0096] Example 3

[0097] A knitted denim fabric comprises a first yarn, a second yarn and a third yarn;

[0098] The first yarn has a linear density of 18 tex and includes a core yarn and a covering yarn. The core yarn is made of spandex fiber, and the covering yarn is made of seaweed fiber and jade cooling fiber (Ice Cool). The mass percentage of each fiber in the first yarn is: 20% spandex fiber, 15% seaweed fiber, and 65% jade cooling fiber.

[0099] The second yarn has a linear density of 18 tex and is made by vortex spinning 40% wt high shrinkage polyester, 58 wt% cotton fiber and 2 wt% 4080 low melting point fiber;

[0100] The third yarn is made of 200D polyester high elastic yarn;

[0101] The second yarn is knitted into loops synchronously with the first yarn in the form of added yarn. The second yarn is located on the reverse side of the first yarn. The loops include normal loops and stretched loops. The third yarn is knitted into loops in the next horizontal row of the normal loops. The remaining positions are located on the reverse side of the knitted denim fabric in the form of floating yarns.

[0102] The preparation method of the above-mentioned knitted denim fabric is as follows:

[0103] 1) Knitting needle arrangement:

[0104] The knitting needles include four types of needles: high, medium, medium-low, and low, which are numbered A, B, C, and D. Six knitting needles are used to arrange a pattern structure cycle. The six knitting needles are arranged in the order of DC, B, C, and C, and a basic cycle sequence is formed. That is, N knitting needles are arranged in the order of M, and a cycle sequence is formed to arrange the needle holes; wherein N is 6n, M is n DC, B, C, and C arranged in sequence, and n is a positive integer;

[0105] The knitting needles required for the remaining needle holes are also arranged in M ​​order until all the needle holes are arranged, and then a needle position is left vacant and placed on the side of the cloth winding rack for use as a planer line.

[0106] 2) Triangle on the machine:

[0107] Using 6-way weaving, a cycle is formed by 1, 2, 3, 4, 5 and 6 ways;

[0108] The knitting needle triangles A, B, C, and D corresponding to the 2nd, 4th, and 6th threads are all fully engaged, and all the needles participate in the knitting;

[0109] The A and D knitting needle triangles of the first route are all out, and the A and D knitting needles participate in the knitting; the B and C knitting needle triangles are floating triangles, and the B and C knitting needles do not participate in the knitting;

[0110] The knitting needle triangle of No. C in the third route is fully out, and the knitting needle of No. C participates in knitting; the knitting needle triangles of No. A, B, and D are floating triangles, and the knitting needles of No. A, B, and D do not participate in knitting;

[0111] The knitting needle triangle of No. B in route 5 is fully out, and the knitting needle of No. B participates in knitting; the knitting needle triangles of No. A, C, and D are floating triangles, and the knitting needles of No. A, C, and D do not participate in knitting;

[0112] 3) Yarn arrangement:

[0113] The third yarn is inserted into the first, third, and fifth threads, and the first yarn is inserted into the second, fourth, and sixth threads, and the second yarn is added by plating. The yarn length of the first and second yarns is 100 stitches / 26 cm, and the yarn length of the third yarn is 100 stitches / 12 cm. The spinning tension of the first and second yarns is 5 cN, and the spinning tension of the third yarn is 3 cN.

[0114] The 4-needle circular knitting machine used in this embodiment includes two yarn storage discs, wherein the speed of one yarn storage disc is 1.8 times that of the other yarn storage disc;

[0115] After weaving through the above steps and then washing, the weight is 280g / m 2 knitted denim fabric.

[0116] Comparative Example 1

[0117] use Figure 1 The fabric structure shown in the figure is that the first yarn is 18tex cotton-spandex core-spun yarn with a spandex content of 20wt%, and the second and third yarns are 18tex pure cotton yarns, and the 280g / m 2 Knitted denim fabric.

[0118] Comparative Example 2

[0119] use Figure 1 The fabric structure shown in the figure is as follows: the first yarn and the second yarn are 18tex cotton-spandex core-spun yarn with a spandex content of 20wt%, and the third yarn is 18tex pure cotton yarn, prepared with a 280g / m 2 Knitted denim fabric.

[0120] Comparative Example 3

[0121] use Figure 1 The fabric structure shown in the figure is that the first yarn, the second yarn and the third yarn are made of 18tex pure cotton yarn, and the weight is 280g / m 2 Knitted denim fabric.

[0122] Product performance testing

[0123] The knitted denim fabrics prepared in Examples 1-3 and Comparative Example 1 were tested, and the test results are shown in Table 1.

[0124] The test items and test standards are as follows:

[0125] 1. The tensile elastic recovery rate and fixed elongation force of knitted fabrics, which reflect the resilience and shape retention properties of knitted fabrics, are tested according to FZ / T70006-2022. A constant-speed stretching method is used, with a stretching speed of 300mm / min, a test specimen length of 100mm, a pre-tension of 0.1N, a test specimen length of L1, and a predetermined elongation of 18mm. The specimen is held for 1 minute and the fixed elongation force is measured. The specimen is then returned to the starting point, held for 3 minutes, and the pre-tension force is applied again. The test specimen length is L2. The tensile elastic recovery rate = (118-L2) / (118-L1)*100%. The tensile force is the tensile force when the specimen is stretched to L2 (118mm).

[0126] 2. The contact cooling coefficient reflects the cooling level of textiles. The test standard is the test method and data calculation method specified in GB / T35263-2017 Testing and evaluation of instantaneous cooling performance of textiles. When the instantaneous cooling performance of textiles is Qmax / [J / (cm 2 ·s)]>0.15, the product has instant cooling performance;

[0127] 3. The antibacterial rate that reflects the antibacterial effect of textiles, the test method is GB / T20944.3;

[0128] 4. Anti-pilling grade reflects the durability of textiles. The test standard is GB / T 4802.

[0129] Table 1

[0130]

[0131] As shown in Table 1, compared with the comparative example, the fabrics produced in the present invention significantly increase the required tensile force at the same elongation, while ensuring a tensile elastic recovery rate of ≥90%. This significantly enhances the fabric's stiffness and width, making the style more suitable for woven denim. The yarn structure design of the present invention significantly enhances the product's cool feel and provides excellent antibacterial properties, making it more suitable for summer denim comfort. Furthermore, the knitted denim fabrics of the present invention exhibit significantly improved resistance to pilling.

[0132] The above specifically describes the preferred embodiments of the present invention, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A knitted denim fabric, characterized in that: The knitted denim fabric includes a first yarn, a second yarn and a third yarn, the first yarn includes a core yarn and a covering yarn, the core yarn includes spandex, the covering yarn includes seaweed fiber and cool fiber, the second yarn includes high-shrinkage fiber, the second yarn is woven into coils synchronously with the first yarn in the form of added yarn, the second yarn is located on the reverse side of the first yarn, the coils include normal coils and stretched coils, the third yarn is woven into coils in the next horizontal row of the normal coils, the third yarn forms a floating line on the reverse side of the stretched coils, and the stretched coils form inclined lines on the surface of the knitted denim fabric.

2. The knitted denim fabric according to claim 1, characterized in that: The spandex accounts for 5-25% of the mass of the first yarn.

3. The knitted denim fabric according to claim 1, characterized in that: The seaweed fiber accounts for 10-30% by mass of the first yarn.

4. The knitted denim fabric according to claim 1, characterized in that: The covered yarn also includes regenerated cellulose fibers.

5. The knitted denim fabric according to claim 1, characterized in that: The mass percentage of the high shrinkage fiber in the second yarn is 20-45%.

6. The knitted denim fabric according to claim 1, characterized in that: The second yarn further includes low-melting-point fibers, and the low-melting-point fibers account for 2-5% by mass of the second yarn.

7. The knitted denim fabric according to claim 1, characterized in that: The second yarn also includes moisture-wicking fibers.

8. The knitted denim fabric according to claim 1, characterized in that: The second yarn is a yarn produced by vortex spinning or siro spinning.

9. The method for preparing the knitted denim fabric according to any one of claims 1 to 8, characterized in that: The following steps are involved: The first yarn, the second yarn and the third yarn are placed on a circular knitting machine for knitting. The knitting structure is a cycle of 6 routes, wherein the third yarn is inserted into the 1st, 3rd and 5th routes, the first yarn is inserted into the 2nd, 4th and 6th routes, and the second yarn is added by adding yarn to produce a knitted denim fabric.

10. A kind of clothing, characterized in that: The invention comprises the knitted denim fabric according to any one of claims 1 to 8.

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