Nylon water-absorbing quick-drying knitted fabric and preparation method thereof

Abstract

The invention provides a nylon water-absorbing quick-drying knitted fabric and a preparation method thereof, the weave structure of the fabric is a single-side jacquard micro-hollow weave structure, the fabric is formed by interweaving first yarns, second yarns and third yarns, the first yarns are nylon yarns, the second yarns are special-shaped structure yarns, and the third yarns are spandex filaments. According to the invention, a single-side jacquard micro-hollow weave structure is adopted, so that tiny air holes are formed in the surface of the fabric, and when the fabric is in contact with water, the water can rapidly permeate into the fabric through the air holes and accelerate the evaporation process; the special-shaped structure yarn is provided with fine grooves which are beneficial to moisture transmission and evaporation, meanwhile, the special-shaped structure yarn and the spandex yarn are interwoven, the fabric has the cotton feeling and has good elasticity on the basis of keeping good moisture absorption and quick drying performance, the cohesive force of the special-shaped section is large, and the cloth cover is shrunk and compact due to the elastic spandex.

Description

Technical Field

[0001] The invention relates to the technical field of knitted fabrics, and in particular to a nylon water-absorbing quick-drying knitted fabric and a preparation method thereof. Background Art

[0002] The emergence of nylon is a major breakthrough in my country's synthetic fiber industry and a very important milestone in synthetic fibers in polymer chemistry. Nylon fabrics are ranked first in abrasion resistance among all kinds of fabrics, many times higher than other fibers. They are extremely durable, elastic and resilient, and not easy to deform, making them very suitable for sports fabrics. However, synthetic fibers have a common disadvantage, which is that their moisture absorption and perspiration wicking performance is far behind that of natural fibers. Nylon fabrics have poor air permeability and hygroscopicity. In a humid environment, the fabrics are not easy to absorb moisture and stick to the body when wet, causing consumers to feel stuffy, airtight, and uncomfortable when wearing them. In addition, nylon fiber monomers contain a large number of carboxyl and amine groups, which are prone to electrostatic effects during friction, resulting in entanglement between fibers and fuzzy pilling. Summary of the invention

[0003] In view of this, the present invention aims to provide a nylon water-absorbing quick-drying knitted fabric and a preparation method thereof, so as to solve the problems that the nylon fabric in the prior art has poor air permeability and hygroscopicity, the fabric is not easy to absorb moisture in a humid environment, and the wet state is sticky, causing consumers to feel stuffy and uncomfortable when wearing it, and the nylon woven fabric is easy to pilling.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A nylon water-absorbing quick-drying knitted fabric, the fabric has a single-sided jacquard micro-hollow structure, the fabric is interwoven with a first yarn, a second yarn, and a third yarn, the first yarn is a nylon yarn, the second yarn is a special-shaped structure yarn, and the third yarn is a spandex yarn.

[0006] This setting adopts a single-sided jacquard micro-hollow structure, which forms tiny air holes on the surface of the fabric. When the fabric comes into contact with water, moisture can quickly penetrate into the interior of the fabric through these air holes and accelerate the evaporation process. The special-shaped structural yarn has fine grooves that are more conducive to the transmission and evaporation of moisture. At the same time, the special-shaped structural yarn and spandex are interwoven. The fabric has a cotton feel and good elasticity. It is tight as a whole and has gaps. While maintaining good moisture absorption and quick-drying properties, the fabric also has good elasticity. The special-shaped cross-section has a large cohesive force, and the elastic spandex makes the cloth shrink and dense.

[0007] Furthermore, the thickness of the nylon yarn is 20-70D.

[0008] In this setting, by controlling the thickness of the nylon yarn, it is beneficial to improve the moisture absorption, quick-drying and anti-pilling properties. For example, the use of 20D nylon yarn has a larger surface area and can absorb more moisture. It is also beneficial to the rapid diffusion and evaporation of moisture. Therefore, it has better moisture absorption and quick-drying performance. However, yarn that is too thin will cause the fabric structure to be too loose, affecting the stability of the moisture absorption and quick-drying performance.

[0009] Furthermore, the thickness of the spandex yarn is 20-40D.

[0010] In this setting, the thickness of the spandex yarn is controlled to give the fabric better elastic recovery, which helps to maintain the shape and stability of the fabric.

[0011] Furthermore, the thickness of the special-shaped structural yarn is 30-80D.

[0012] By controlling the thickness of the special-shaped structural yarn, not only the stability and deformation resistance of the fabric are improved, but also the friction and entanglement between fibers are reduced, thereby reducing the risk of pilling.

[0013] Furthermore, the F number of the nylon yarn is 12-68F.

[0014] Furthermore, the cross section of the special-shaped structural yarn is one of a cross shape, a herringbone shape, an I shape, a snowflake shape, and a gear shape.

[0015] Furthermore, the special-shaped structural yarn is obtained by alkali reduction treatment of a two-component composite filament composed of polyester as a sheath layer and nylon as a core layer.

[0016] Furthermore, the thickness of the bicomponent composite filament is 50-100D, and the F number of the bicomponent composite filament is 36-68F.

[0017] By controlling the F number of the two-component composite filament, the F number of the special-shaped structural yarn is controlled. The F number represents the single fiber density, which not only affects the feel and breathability of the fabric, but also affects the anti-pilling property of the fabric. For example, a higher F number means that the fiber is finer and softer, which can provide a better fit and comfort; at the same time, according to the wicking principle, the fiber absorbs water better, which improves the quick-drying performance of the fabric. However, a higher F number means that the fiber is finer and softer, but it also increases the chance that the fiber head ends are exposed on the surface of the fabric. These fiber heads are easily entangled when subjected to external friction, forming hairiness and pilling.

[0018] Furthermore, the fabric is woven by three-track knitting needles of a single-sided large circular machine, and the fabric consists of six routes as a cycle. The organizational structure of the fabric is: the organizational structure of the first route, the second route, the third route, and the fifth route are respectively: loop organization, loop organization, and loop organization; the organizational structure of the fourth route and the sixth route is: floating thread organization, loop organization, and collection loop organization; the first route, the second route, the third route, and the fifth route are connected to the second yarn and the third yarn, and the fourth route and the sixth route are connected to the first yarn.

[0019] The invention makes a positive contribution to quick-drying and anti-pilling performance by enhancing the cohesion between fibers, reducing the exposure of fiber ends, improving the tightness and wear resistance of the fabric, and optimizing the weaving method. This organizational structure enables the fabric to have good quick-drying and anti-pilling performance while maintaining air permeability and comfort.

[0020] Furthermore, the fabric is woven by three-track knitting needles of a single-sided large circular machine, and the fabric consists of six routes as a cycle. The organizational structure of the fabric is: the organizational structure of the first route, the second route, and the third route are respectively: loop organization, loop organization, and loop organization; the organizational structure of the fourth route, the fifth route, and the sixth route are: floating thread organization, loop organization, and loop organization; the first route, the second route, and the third route are connected to the second yarn and the third yarn, and the fourth route, the fifth route, and the sixth route are connected to the first yarn.

[0021] This setting can form a single-sided jacquard micro-hollow structure to improve moisture absorption and quick-drying performance.

[0022] A method for preparing a nylon water-absorbing quick-drying knitted fabric, used for preparing the above-mentioned fabric, comprises the following steps:

[0023] S1, yarn count preparation;

[0024] S2, fabric weaving;

[0025] S3, fabric alkali reduction treatment;

[0026] S4: water washing;

[0027] S5: Dyeing and finishing process.

[0028] In this setting, alkali reduction treatment is used before dyeing to completely remove the polyester component, avoiding the use of a single serrated fiber cross-section that is easily deformed during the weaving process and fails to achieve the desired moisture absorption and perspiration effect. Impurities in the fabric after alkali reduction treatment are removed by washing, thereby improving the subsequent dyeing effect.

[0029] Furthermore, the specific steps of step S3 are: adding an alkaline solution into a dye vat, placing the woven fabric into the dye vat according to a bath ratio of 1:8-15, raising the temperature to 85-90° C., and treating for 30-60 minutes.

[0030] Furthermore, the dyeing and finishing process comprises the following steps:

[0031] S51, scheduled type;

[0032] S52, staining;

[0033] S53, functional processing;

[0034] S54, re-shaping.

[0035] This setting gives the fabric better stability, color fastness, moisture absorption and quick drying, and anti-pilling properties.

[0036] Compared with the prior art, the nylon water-absorbing quick-drying knitted fabric and the preparation method thereof described in the present invention have the following advantages:

[0037] 1) The present invention adopts a single-sided jacquard micro-hollow structure to form tiny air holes on the surface of the fabric. When the fabric comes into contact with water, the water can quickly penetrate into the fabric through these air holes and accelerate the evaporation process. The special-shaped structural yarn has fine grooves, which is more conducive to the transmission and evaporation of water. At the same time, the special-shaped structural yarn is interwoven with spandex yarn. The fabric has both cotton feel and good elasticity, is compact as a whole, and has gaps. The fabric has good elasticity while maintaining good moisture absorption and quick-drying performance, and the special-shaped cross-section has a large cohesive force. The elastic spandex makes the fabric shrink and compact.

[0038] 2) The present invention controls the gaps between fabrics by controlling the thickness of nylon yarn, spandex yarn and special-shaped structural yarn, thereby improving water absorption and quick-drying performance. In addition, by selecting the thickness of the yarn, the cohesion between fibers is controlled, and the slippage and entanglement of the fibers during friction are reduced, thereby reducing the risk of pilling.

[0039] 3) The present invention uses alkali reduction treatment on the woven fabric before dyeing to completely remove the polyester component, thereby avoiding the single serrated fiber cross-section being easily deformed during the weaving process and failing to achieve the desired moisture absorption and perspiration removal effect. The impurities of the fabric after the alkali reduction treatment are removed by washing, thereby improving the subsequent dyeing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a knitting arrangement diagram of embodiment 1 of the present invention;

[0041] Figure 2 A triangular arrangement diagram of embodiment 1 of the present invention;

[0042] Figure 3 This is a knitting arrangement diagram of embodiment 2 of the present invention;

[0043] Figure 4 A triangular arrangement diagram of embodiment 2 of the present invention;

[0044] Figure 5 Schematic diagram of the structure of the two-component composite filament of Example 1 and Example 2 of the present invention;

[0045] Figure 6 Schematic diagram of the structure of the zigzag special-shaped structural yarn of Example 1 and Example 2 of the present invention Figure 1 ;

[0046] Figure 7 Schematic diagram of the structure of the zigzag special-shaped structural yarn of Example 1 and Example 2 of the present invention Figure 2 .

[0047] Description of the drawings

[0048] 1-first needle, 2-second needle, 3-third needle, 4-two-component composite yarn, 41-skin layer, 42-core layer. DETAILED DESCRIPTION

[0049] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0050] Example 1

[0051] The present invention relates to a nylon water-absorbing quick-drying knitted fabric, the fabric is a single-sided jacquard micro-hollow structure, using a single-sided large circular knitting machine, the needle gauge is 24-40G, the number of needles is 1968-3768, the fabric is interwoven by a first yarn, a second yarn, and a third yarn, the first yarn is a nylon yarn, the second yarn is a special-shaped structure yarn, and the third yarn is a spandex yarn. Preferably, the needle gauge is 24G and the number of needles is 2500.

[0052] This setting adopts a single-sided jacquard micro-hollow structure, which is conducive to air circulation and moisture evaporation inside the fabric; the micro-hollow design forms tiny air holes on the surface of the fabric. When the fabric comes into contact with water, moisture can quickly penetrate into the fabric through these air holes and accelerate the evaporation process; at the same time, the special-shaped structural yarn and spandex yarn are interwoven, so that the fabric surface has good elasticity, overall tightness, and gaps. The fabric has good elasticity while maintaining good moisture absorption and quick-drying properties, and the special-shaped cross-section has a large cohesive force. The elastic spandex makes the fabric shrink and dense.

[0053] Specifically, the cross section of the special-shaped structural yarn is one or more of a cross, a herringbone, an I-shaped, a snowflake, and a gear. Compared with ordinary circular cross-section yarn, the special-shaped structural yarn in this setting increases the area of ​​contact between the fabric and the air, increases the gaps in the fabric, and has better moisture absorption and perspiration function; and the fiber morphology and cross-sectional shape of the special-shaped structural yarn can reduce the mutual friction and entanglement between fibers, thereby reducing the possibility of pilling.

[0054] More specifically, the cross section of the special-shaped structural yarn is gear-shaped.

[0055] The gear-like structure in this setting has a higher moisture regain and a more velvety feel compared to other special-shaped sections, making the fabric look and feel more like cotton. This fabric is a nylon imitation cotton fabric with moisture absorption and perspiration removal functions.

[0056] like Figure 1 As shown, the fabric is knitted by three needles on a single side, wherein the first needle 1 is arranged and repeated 10101010, the second needle 2 is arranged and repeated 01010100, and the third needle 3 is arranged and repeated 00000001. Among them, 0 represents not participating in knitting, and 1 represents participating in knitting.

[0057] like Figure 2 As shown, the fabric is woven by three-track knitting needles of a single-sided large circular machine, and the fabric consists of six routes as a cycle. The organizational structure of the fabric is: the organizational structure of the first route, the second route, the third route, and the fifth route are respectively: loop organization, loop organization, and loop organization; the organizational structure of the fourth route and the sixth route is: floating thread organization, loop organization, and tuck organization.

[0058] Among them, the first route, the second route, the third route and the fifth route are connected to the second yarn and the third yarn, that is, the first yarn and the second yarn are fed synchronously at a certain angle, so that the second yarn completely covers the third yarn, and the weaving structure of the second yarn and the third yarn is a filling yarn structure; the fourth route and the sixth route are connected to the first yarn.

[0059] Specifically, the thickness of the nylon yarn is 20-70D, the thickness of the spandex yarn is 20-40D, and the thickness of the special-shaped structural yarn is 30-80D.

[0060] Specifically, the F number of the nylon yarn is 12-68F, and the F number of the special-shaped structural yarn is 36-48F.

[0061] Specifically, the special-shaped structural yarn is obtained by alkali reduction treatment of a bicomponent composite filament 4 composed of polyester as a skin layer 41 and nylon as a core layer 42; wherein the polyester accounts for 20-30% (mass ratio) in the bicomponent composite filament, and the gear nylon accounts for 70-80%. More specifically, the bicomponent composite filament is prepared by a conventional method, and it only needs to meet the requirements that the polyester is coated on the outside of the serrated nylon and is easy to dissolve from the polyester skin layer after alkali reduction treatment. The alkali reduction treatment is a conventional technology and will not be described in detail here.

[0062] Specifically, the thickness of the bicomponent composite filament is 50-100D, and the F number of the bicomponent composite filament is 36-68F.

[0063] Preferably, the first, second, third and fifth routes are connected with 70D / 48F bicomponent composite filaments and 30D spandex yarns, the polyester proportion (mass ratio) in the bicomponent composite filaments is 25%, the gear nylon proportion is 75%, and the fourth and sixth routes are connected with 30D / 12F nylon yarns.

[0064] Specifically, the length of the coil woven by the first yarn is 7-9 cm / 50 stitches, the length of the coil woven by the second yarn is 10-12 cm / 50 stitches, and the length of the coil woven by the third yarn is 3-5 cm / 50 stitches.

[0065] Preferably, the length of the coil knitted by the first yarn is 8 cm / 50 stitches, the length of the coil knitted by the second yarn is 11.2 cm / 50 stitches, and the length of the coil knitted by the third yarn is 4.1 cm / 50 stitches.

[0066] This setting controls the length of the coils, which not only keeps a larger gap between the coils to facilitate air circulation, but also makes the fabric more stable and less likely to deform. At the same time, it also strengthens the cohesion of the fiber parts and reduces the risk of pilling.

[0067] Example 2

[0068] The present invention relates to a nylon water-absorbing quick-drying knitted fabric, the fabric is a single-sided jacquard micro-hollow structure, a single-sided large circular knitting machine is used, the needle gauge is 24-40G, the number of needles is 1968-3768, the fabric is interwoven by a first yarn, a second yarn, and a third yarn, the first yarn is a nylon yarn, the second yarn is a special-shaped structure yarn, and the third yarn is a spandex yarn. Preferably, the needle gauge is 40G and the number of needles is 3500.

[0069] Preferably, the cross section of the special-shaped structural yarn is gear-shaped.

[0070] like Figure 1 As shown, the fabric is knitted by three needles on one side, wherein the first needle is arranged in a 1010 cycle, the second needle is arranged in a 0100 cycle, and the third needle is arranged in a 0001 cycle. 0 represents not participating in knitting, and 1 represents participating in knitting.

[0071] like Figure 2 As shown, the fabric is woven by three-track knitting needles of a single-sided large circular machine, and the fabric consists of six routes as a cycle. The organizational structure of the fabric is: the organizational structure of the first route, the second route, and the third route are respectively: loop organization, loop organization, and loop organization; the organizational structure of the fourth route, the fifth route, and the sixth route are: floating thread organization, tuck organization, and loop organization.

[0072] Among them, the first route, the second route and the third route are connected to the second yarn and the third yarn, that is, the second yarn and the third yarn are fed synchronously, so that the second yarn completely covers the third yarn, and the weaving structure of the second yarn and the third yarn is a plaiting structure; the fourth route, the fifth route and the sixth route are connected to the first yarn.

[0073] Specifically, the thickness of the nylon yarn is 20-70D, the thickness of the spandex yarn is 20-40D, and the thickness of the special-shaped structural yarn is 30-80D.

[0074] Specifically, the F number of the nylon yarn is 12-24, and the F number of the special-shaped structural yarn is 36-48.

[0075] Specifically, the special-shaped structural yarn is obtained by alkali reduction treatment of a bicomponent composite filament composed of polyester as a sheath layer and nylon as a core layer; wherein the polyester accounts for 20-30% (mass ratio) in the bicomponent composite filament, and the gear nylon accounts for 70-80%. Alkali reduction treatment is a conventional technology and will not be described in detail here.

[0076] Specifically, the thickness of the bicomponent composite filament is 50-100D, and the F number of the bicomponent composite filament is 36-48.

[0077] Preferably, the first, second, third and fifth routes are connected with 50D / 36F bicomponent composite filament and 20D spandex yarn, the polyester proportion (mass ratio) in the bicomponent composite filament is 20%, the gear nylon proportion is 80%, and the second and fourth routes are connected with 30D / 12F nylon yarn.

[0078] Specifically, the length of the coil woven by the first yarn is 5 to 7 cm / 50 stitches, the length of the coil woven by the second yarn is 10 to 12 cm / 50 stitches, and the length of the coil woven by the third yarn is 3 to 5 cm / 50 stitches.

[0079] Preferably, the length of the coil knitted by the first yarn is 6 cm / 50 stitches, the length of the coil knitted by the second yarn is 10.8 cm / 50 stitches, and the length of the coil knitted by the third yarn is 3.8 cm / 50 stitches.

[0080] Example 3

[0081] The difference between this embodiment and embodiment 1 is that it further includes a method for preparing a nylon water-absorbing and quick-drying knitted fabric, which specifically includes the following steps:

[0082] S1: Yarn count preparation;

[0083] Specifically, in step S1, the yarn count is prepared using the yarn in Example 1 as the weaving yarn.

[0084] S2: fabric weaving;

[0085] Specifically, in step S2, the braided structure in embodiment 1 is adopted.

[0086] S3: fabric alkali reduction treatment;

[0087] In step S3, the specific steps are: adding an alkaline solution into a dye vat, placing the woven fabric into the dye vat according to a bath ratio of 1:8-15, raising the temperature to 85-90°C, treating for 30-60 minutes, taking it out, and obtaining a nylon yarn having a serrated structure; the alkaline solution is a sodium hydroxide solution, and the pH of the alkaline solution treatment is 9-10.

[0088] Preferably, the bath ratio is 1:40, the temperature is raised to 85°C, the pH is controlled at 10, and the treatment time is 45 minutes.

[0089] This setting uses alkali reduction treatment before dyeing to completely remove the polyester component and avoid the single serrated fiber cross-section in the weaving process, which is easy to deform and cannot achieve the desired moisture absorption and perspiration effect.

[0090] S4: washing: washing and refining the fabric after the alkali weight reduction treatment in step S2, controlling the water temperature to 60-80°C and the speed to 12-15 m / min. Preferably, the water temperature is 70°C and the speed is 13 m / min.

[0091] This setting removes impurities from fabrics after alkali weight reduction treatment, improving the effects of subsequent dyeing and functional treatment.

[0092] S5: dyeing and finishing process;

[0093] In step S5, the following steps are also included:

[0094] S51: Predetermined type;

[0095] A high temperature setting treatment is adopted, the temperature is 160-190°C, and the speed is 25-35m / min. This setting avoids gear-shaped deformation in the fabric during the dyeing process, poor fabric stability, and poor dyeing effect. The preferred temperature is 170°C and the speed is 22m / min.

[0096] S52: staining;

[0097] The pre-shaped fabric is dyed through a dyeing machine. The dyeing process is as follows:

[0098] When the temperature of the dye vat of the dyeing machine reaches 40℃, dyeing auxiliaries and acid dyes are injected in sequence according to the bath ratio of 1:10, and then the temperature of the dye vat is heated to 50℃ at a heating rate of 0.55℃ / min, kept for 10min, then heated to 60℃ at a heating rate of 0.55℃ / min, kept for 10min, then heated to 70℃ at a heating rate of 0.55℃ / min, kept for 10min, then heated to 80℃ at a heating rate of 1℃ / min, kept for 40min, then cooled to 50℃ at a cooling rate of 2℃ / min, added the fixing solution to the dye vat, fixed the color for 30min, and drained.

[0099] Specifically, the dyeing auxiliary agent is a nylon stripe treatment agent, an anti-friction lubricant in the bath, a nylon fiber dyeing accelerator TANEDE EDA, and a pH sliding agent AG-52;

[0100] Specifically, the acid dye is acid yellow dye, acid orange dye, acid blue dye;

[0101] Specifically, the color fixing solution is acetic acid and a color fixing agent, and the color fixing agent is a conventional color fixing agent.

[0102] Specifically, the dyeing pH in the dyeing process is 4-4.5.

[0103] In this embodiment, the serrated nylon yarn is obtained by alkali reduction treatment, which will lead to uneven distribution of the dye and slow diffusion of the dye. Therefore, the dyeing process, heating rate, temperature gradient, insulation time, dyeing pH, and dye are controlled to improve the color fastness of the dyeing.

[0104] Specifically, the formula of the dye in the dyeing process is:

[0105]

[0106] The g / L represents the mass of the substance contained in 1L of dye solution. 1L of dye solution is prepared by adding water to the above-mentioned prescribed amount of dyeing auxiliaries and acid dyes to make the volume 1L.

[0107] S53: functional processing;

[0108] Quick-drying finishing agent and anti-pilling agent JF-505F were added to the dye vat, and the temperature of the dye vat was raised to 70°C at a heating rate of 1°C / min, kept at this temperature for 20 minutes, and then lowered to 55°C at a cooling rate of 2°C / min, and the liquid was drained.

[0109] Specifically, the quick-drying finishing agent is:

[0110] Moisture absorbing quick-drying finishing agent LT-X06 1.0% owf;

[0111] Slip agent VS 0.6g / L;

[0112] Anti-pilling agent JF-505F 1%.

[0113] This embodiment further improves the quick-drying and anti-pilling properties of the fabric by performing functional treatment on the fabric.

[0114] S54: reshaping, the functionally treated fabric is shaped by a shaping machine, the shaping temperature is 150° C., and the speed is 28 m / min. The reshaping in this embodiment is to improve the stability of the fabric.

[0115] Comparative Example 1

[0116] This comparative example differs from Example 3 in that no functional treatment is included.

[0117] Effect example

[0118] The fabrics of Examples 1 to 3 and Comparative Example 1 were tested for performance, and the results are shown in Table 1.

[0119] Table 1

[0120]

[0121] It can be seen from Table 1 above that the fabrics obtained in Examples 1 to 3 of the present invention not only have good quick-drying performance, but also maintain good stability, color fastness and anti-pilling performance.

[0122] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A nylon water-absorbing quick-drying knitted fabric, characterized in that: The fabric structure is a single-sided jacquard micro-hollow structure, and the fabric is interwoven by a first yarn, a second yarn, and a third yarn. The first yarn is a nylon yarn, the second yarn is a special-shaped structural yarn, and the third yarn is a spandex yarn. The thickness of the nylon yarn is 20 to 70D, the thickness of the spandex yarn is 20 to 40D, and the thickness of the special-shaped structural yarn is 30 to 80D.

2. The fabric according to claim 1, characterized in that: The F number of the nylon yarn is 12-68F.

3. The fabric according to claim 1, characterized in that: The cross section of the special-shaped structural yarn is one of a cross shape, a herringbone shape, an I shape, a snowflake shape and a gear shape.

4. The fabric according to claim 1, characterized in that: The special-shaped structural yarn is obtained by alkali reduction treatment of a two-component composite filament composed of polyester as a skin layer and nylon as a core layer.

5. The fabric according to claim 4, characterized in that: The thickness of the bicomponent composite filament is 50-100D, and the F number of the bicomponent composite filament is 36-68F.

6. The fabric according to claim 1, characterized in that: The fabric is knitted by three-track knitting needles of a single-sided large circular knitting machine. The fabric has six routes as one cycle. The weave structure of the fabric is: the weave structure of the first route, the second route, the third route and the fifth route are: loop weave, loop weave and loop weave in sequence; The organization structure of the fourth route and the sixth route is: floating thread organization, loop organization, and tuck organization; the first route, the second route, the third route, and the fifth route are connected to the second yarn and the third yarn, and the fourth route and the sixth route are connected to the first yarn.

7. The fabric according to claim 1, characterized in that: The fabric is knitted by three-track knitting needles of a single-sided large circular knitting machine. The fabric has six routes as one cycle. The weave structure of the fabric is: the weave structure of the first route, the second route and the third route are: loop weave, loop weave and loop weave in sequence; The organization structures of the fourth route, the fifth route and the sixth route are: floating thread organization, tuck organization and loop organization; the first route, the second route and the third route are connected to the second yarn and the third yarn, and the fourth route, the fifth route and the sixth route are connected to the first yarn.

8. A method for preparing a nylon water-absorbing quick-drying knitted fabric, used for preparing the fabric according to any one of claims 1 to 7, characterized in that: The steps include: S1, yarn count preparation; S2, fabric weaving; S3, fabric alkali reduction treatment; S4: water washing; S5: Dyeing and finishing process.

9. The preparation method according to claim 8, characterized in that: The specific steps of step S3 are: adding alkaline solution into the dye vat, according to the bath ratio of 1:8-15, placing the woven fabric into the dye vat, raising the temperature to 85-90°C, and treating for 30-60 minutes.

10. The preparation method according to claim 8, characterized in that: The dyeing and finishing process comprises the following steps: S51, scheduled type; S52, staining; S53, functional processing; S54, re-shaping.

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