A quick-drying and breathable knitted fabric and its preparation process

Abstract

The present invention provides a quick-drying and breathable knitted fabric and its preparation process. The fabric includes a knitting structure with two tracks on the upper dial and two tracks on the lower cylinder, and the fabric includes 20 yarn filaments arranged in a cycle. Among them, the 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, and 19th tracks are woven with new moisture-absorbing and quick-drying filaments to form the front of the fabric, and the 2nd, 4th, 6th, 8th, 10th, 12th, 14th, 16th, 18th, and 20th tracks are woven with flat filaments and new moisture-absorbing and quick-drying filaments to form the back of the fabric. The front of the fabric includes concave parts and convex parts. The concave parts are woven with the 1st, 3rd, and 5th yarn filaments, and the convex parts are woven with the 7th, 9th, 11th, 13th, 15th, 17th, and 19th yarn filaments. Through the quick-drying and breathable knitted fabric and its preparation process of the present invention, the air permeability of the fabric can be improved, the evaporation rate of the fabric can be enhanced, the moisture-absorbing and quick-drying effect of the fabric can be improved, the durability of the moisture-absorbing and quick-drying and skin-friendly and comfortable effect of the fabric can be increased, the fabric quality can be improved, and the complexity of the preparation process can also be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of knitting, and in particular to a quick-drying breathable knitted fabric and a preparation process thereof. Background Art

[0002] At present, exercise is closely related to our daily life. Whether it is running, playing ball or physical training, the body needs to move in a wide range and generate a lot of heat. Therefore, there is a higher demand for the breathability and evaporation rate of clothes worn during exercise. However, even though there are many moisture-absorbing and quick-drying fabrics on the market, some of them achieve the moisture-absorbing and quick-drying function through dyeing and finishing auxiliaries. This kind of fabric usually loses its effect after washing several times; some achieve the moisture-absorbing and quick-drying function through yarn, but the evaporation rate is not very high, and the actual quick-drying effect is not very ideal; therefore, how to improve the moisture-absorbing, quick-drying and breathable performance of fabrics to meet people's actual needs is one of the problems that need to be solved urgently.

[0003] Patent CN115787181A relates to an antibacterial knitted fabric, which is a single-sided knitted fabric. The first yarn and the second yarn are used as the knitting yarns. The minimum circulation unit is 12 knitting rows. The odd-numbered knitting rows are used to knit the first yarn, and the even-numbered knitting rows are used to knit the second yarn. The first yarn is pure bamboo fiber or blended yarn, and the second yarn is a chemically synthesized yarn. The preparation process of the fabric is as follows: the machine is prepared by selecting suitable knitting equipment, and then the yarn is threaded, and the equipment is arranged in sequence and the triangle is arranged before weaving. After the weaving is completed, the fabric is pre-treated, dyed, and finished. The special setting of the yarn is beneficial to the fabric having good antibacterial properties and washing resistance. However, from the perspective of its triangle arrangement, each route of the fabric is composed of a collection loop and a loop. The triangular arrangement is relatively simple, and the knitting needles of the knitting equipment are always in a knitting state during the knitting process. In the patent CN114045603A, an antibacterial and breathable fabric and its processing technology are involved. The processing steps are: spinning, weaving, pre-setting, scouring, dyeing and setting. The breathable fabric is double-sided knitted by a double-sided circular knitting machine, and the knitted yarn includes at least 75D / 72FDTY polyester yarn. 12-way knitting is used as a knitting cycle. The triangular arrangement of the fabric adopts floating line and loop formation according to the set arrangement. The fabric is provided with a jacquard structure, and air holes are provided on the jacquard structure. To a certain extent, it avoids the knitting needles of the equipment from being in a state of being knitted all the time, and can also achieve the effect of ventilation and quick drying, but the area where the air holes are set is relatively fixed. Summary of the invention

[0004] In view of this, the present invention aims to provide a quick-drying and breathable knitted fabric and its preparation process to solve the problems in the prior art, such as insufficient air permeability of the fabric, low evaporation rate, poor moisture absorption and quick-drying effect of the fabric, and poor persistence of maintaining the moisture absorption and quick-drying effect of the fabric. Thus, it can effectively improve the air permeability of the fabric, enhance the evaporation rate of the fabric, improve the moisture absorption and quick-drying effect of the fabric, increase the persistence of the moisture absorption and quick-drying and skin-friendly and comfortable effects of the fabric, improve the quality of the fabric, and avoid the continuous operation of each knitting needle of the knitting equipment.

[0005] To achieve the above object, the technical solution of the present invention is realized as follows:

[0006] A quick-drying and breathable knitted fabric and its preparation process according to the present invention. The quick-drying and breathable knitted fabric adopts a knitting structure of two-track upper needle cylinder and two-track lower needle cylinder, and the fabric includes 20 yarn filaments arranged in a cycle. The 20 yarn filaments include a new type of moisture absorption and quick-drying filament and a flat filament. Among them, the 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, and 19th tracks are woven with the new type of moisture absorption and quick-drying filament to form the front of the fabric, and the 2nd, 4th, 6th, 8th, 10th, 12th, 14th, 16th, 18th, and 20th tracks are woven with the new type of moisture absorption and quick-drying filament and the flat filament to form the back of the fabric. The front of the fabric includes a concave part and a convex part. The concave part is woven by the 1st, 3rd, and 5th yarn filaments, and the convex part is woven by the 7th, 9th, 11th, 13th, 15th, 17th, and 19th yarn filaments.

[0007] Further, the 2nd, 4th, 6th, and 8th yarn filaments on the back of the fabric are flat filaments, and the 10th, 12th, 14th, 16th, 18th, and 20th yarn filaments on the back of the fabric are new type of moisture absorption and quick-drying filaments.

[0008] Further, the cross-section of the new type of moisture absorption and quick-drying filament has a cross-shaped special groove and pores. There is at least one pore, and the expansion technology is used for the new type of moisture absorption and quick-drying filament to expand the free volume between the molecular chains inside the fiber by 20 - 30 v / v%. The flat filament is a special filament with a flat cross-section.

[0009] Further, the weight percentage of the yarn filaments arranged on the front of the fabric is recorded as m%, and the weight percentage of the yarn filaments arranged on the back of the fabric is recorded as n%. |m% - n%| ≤ 30%.

[0010] Further, the yarn count range of the new type of moisture absorption and quick-drying filament is 50D - 100D.

[0011] Further, the yarn count range of the flat filament is 30D - 75D.

[0012] Further, the knitting structure of the 20 yarns is arranged from the upper needle cylinder to the lower needle cylinder as follows: for the 1st, 3rd, and 5th yarns, they are respectively upper needle loop formation, upper needle loop formation, lower needle float stitch, and lower needle tuck stitch; for the 2nd, 4th, 6th, 8th, 10th, 12th, 14th, 16th, 18th, and 20th yarns, they are respectively upper needle float stitch, upper needle float stitch, lower needle loop formation, and lower needle loop formation; for the 7th, 9th, 11th, 13th, 15th, 17th, and 19th yarns, they are respectively upper needle loop formation, upper needle loop formation, lower needle float stitch, and lower needle float stitch.

[0013] Further, the fabric is knitted by a double-sided machine. The knitting needles on the upper needle cylinder of the double-sided machine are arranged in a staggered circular arrangement of high and low heel needles, and the lower needle cylinder of the double-sided machine is arranged in a staggered circular arrangement of 7 high heel needles and 1 low heel needle.

[0014] A preparation process of a quick-drying and breathable knitted fabric. To prepare the described quick-drying and breathable knitted fabric, the process includes the following steps:

[0015] Step 1: Through experimental comparison, select the optimal configuration of the new moisture-absorbing and quick-drying filament and the formulation of the dyeing and finishing auxiliaries;

[0016] Step 2: Select the knitting equipment, and select the matching method of the yarns according to the machine number of the knitting equipment, and then carry out knitting;

[0017] Step 3: After knitting, carry out dyeing and finishing treatment.

[0018] Further, the dyeing and finishing treatment process in Step 3 includes:

[0019] Step S31: Open-width washing;

[0020] Step S32: Preshrinking;

[0021] Step S33: Dyeing;

[0022] Step S34: Re-shrinking.

[0023] Compared with the prior art, the described quick-drying and breathable knitted fabric and its preparation process of the present invention have the following beneficial effects:

[0024] Through the fabric and its preparation process, it can effectively improve the air permeability of the fabric, enhance the evaporation rate of the fabric, improve the moisture-absorbing and quick-drying effect of the fabric, increase the durability of the moisture-absorbing, quick-drying, skin-friendly and comfortable effect of the fabric, improve the quality of the fabric, simplify the process complexity of preparing the fabric, improve the preparation efficiency of the fabric, enhance the safety and practicability of the fabric, and greatly expand the scope of application of the fabric. Description of the Drawings

[0025] The accompanying drawings that form a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying

[0026] In the figures:

[0027] Figure 1 is a schematic diagram of the arrangement of knitting needles in the preparation of knitted fabrics;

[0028] Figure 2 is a schematic diagram of the arrangement of cams in the preparation of knitted fabrics;

[0029] Figure 3 is a schematic diagram of the front side of the fabric after preparation;

[0030] Figure 4 is a schematic diagram of the reverse side of the fabric after preparation. Detailed embodiments

[0031] The inventive concepts of the present disclosure will hereinafter be described using terms that are commonly used by those skilled in the art to convey the substance of their work to other artisans in the art. However, these inventive concepts may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

[0032] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0033] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0034] This embodiment is directed to knitted fabrics. The same as conventional knitted fabrics, the overall structure is composed of yarns and dyeing and finishing auxiliaries.

[0035] In the prior art, there are many moisture-absorbing and quick-drying fabrics on the market. Some of them achieve the function of moisture absorption and quick drying through dyeing and finishing auxiliaries. Such fabrics usually lose their effects after being washed several times; some achieve the function of moisture absorption and quick drying through yarns, but the evaporation rate is not very high, and the actual quick-drying effect is not very ideal. In addition, the fabrics mentioned in some patents have wash resistance after dyeing and pre- and post-treatment of the fabrics, and due to the special arrangement of the yarns, the fabrics have the characteristics of moisture absorption and quick drying.

[0036] To solve the problems in the prior art, such as insufficient air permeability of the fabric, low evaporation rate, poor moisture absorption and quick-drying effect of the fabric, and poor durability of the fabric in maintaining the moisture absorption and quick-drying effect; this embodiment proposes a quick-drying and breathable knitted fabric and its preparation process. The fabric is knitted by a double-sided knitting machine, and the knitted fabric adopts a knitting structure with two needle tracks on the upper needle cylinder and two needle tracks on the lower needle cylinder. The fabric includes 20 yarn filaments arranged in a cycle. The 20 yarn filaments include a new type of moisture absorption and quick-drying filament and a flat filament. Among them, the 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, and 19th filaments are used to weave the front side of the fabric with the new type of moisture absorption and quick-drying filament, and the 2nd, 4th, 6th, 8th, 10th, 12th, 14th, 16th, 18th, and 20th filaments are used to weave the back side of the fabric with the new type of moisture absorption and quick-drying filament and the flat filament. The front side of the fabric includes concave parts and convex parts. The concave parts are woven by the 1st, 3rd, and 5th yarn filaments, and the convex parts are woven by the 7th, 9th, 11th, 13th, 15th, 17th, and 19th yarn filaments. In this embodiment, the 20 yarn filaments are the minimum cycle knitting structure.

[0037] Through the setting of the knitting structure of this fabric, 20-way cyclic yarn filaments are knitted, which can effectively enhance the evaporation rate of the fabric, improve the moisture absorption and quick-drying effect of the fabric, and increase the durability of the moisture absorption, quick-drying and skin-friendly and comfortable effects of the fabric, improve the quality of the fabric, and avoid the continuous operation of each knitting needle of the knitting equipment. In addition, the staggered setting of the concave parts and the convex parts effectively improves the air permeability of the fabric and can enhance the aesthetics of the fabric. To a certain extent, it also increases the evaporation area of the fabric, so that the fabric can evaporate super-fast before and after washing or after moisture absorption, achieving the effect of enhancing the evaporation rate of the fabric and enabling the fabric to dry quickly.

[0038] Among them, the front side of the knitted fabric is woven and made of the new type of moisture absorption and quick-drying filament, and the back side of the knitted fabric is woven and made by combining the new type of moisture absorption and quick-drying filament and the flat filament. The cross-section of the new type of moisture absorption and quick-drying filament has a cross-shaped special groove and multiple pores. There is at least one pore, and the expansion technology is used for the new type of moisture absorption and quick-drying filament to expand the free volume between the molecular chains inside the fiber by 20-30 v / v%. The flat filament is a special filament with a flat cross-section. The yarn count range of the new type of moisture absorption and quick-drying filament is 50D-100D, and the yarn count range of the flat filament is 30D-75D. In addition, the 2nd, 4th, 6th, and 8th yarn filaments on the back side of the fabric are flat filaments, and the 10th, 12th, 14th, 16th, 18th, and 20th yarn filaments on the back side of the fabric are the new type of moisture absorption and quick-drying filaments. The weight percentage of the yarn filaments configured on the front side of the fabric is denoted as m%, and the weight percentage of the yarn filaments configured on the back side of the fabric is denoted as n%. |m% - n%| ≤ 30%.

[0039] By setting up the new moisture-absorbing and quick-drying filament and flat filament, the moisture-absorbing and quick-drying characteristics of the fabric can be effectively enhanced, and the evaporation rate of the fabric can be increased. Due to the puffing technology treatment and the specific structure of the new moisture-absorbing and quick-drying filament, it is beneficial to moisture absorption and evaporation. Moreover, the setting of a large number of pores in the internal structure of the new moisture-absorbing and quick-drying filament can greatly reduce the weight of the yarn, lower the weight of the prepared fabric, and improve the applicability of the fabric when used for running T-shirts, basketball vests, and other sports apparels. And |m%-n%|≤30%, which avoids the overall unevenness of the front and back sides of the fabric, and improves the comfort and skin-friendly effect of the fabric.

[0040] In addition, the knitting needles on the upper needle cylinder of the double-sided knitting machine are arranged in a form of alternating high and low heel needles in a circular pattern, that is, arranged in a form of alternating 1 high heel needle and 1 low heel needle in a circular pattern. The lower needle cylinder of the double-sided knitting machine is arranged in a form of alternating 7 high heel needles and 1 low heel needle in a circular pattern. As shown in the figure, it is a knitting needle arrangement in the form of 2 rows × 8 columns; the knitting structure of 20 yarns is arranged in the order from the upper needle cylinder to the lower needle cylinder as follows: for the 1st, 3rd, and 5th paths, they are upper needle forming a loop, upper needle forming a loop, lower needle floating yarn, and lower needle gathering loop in sequence; for the 2nd, 4th, 6th, 8th, 10th, 12th, 14th, 16th, 18th, and 20th paths, they are upper needle floating yarn, upper needle floating yarn, lower needle forming a loop, and lower needle forming a loop in sequence; for the 7th, 9th, 11th, 13th, 15th, 17th, and 19th paths, they are upper needle forming a loop, upper needle forming a loop, lower needle floating yarn, and lower needle floating yarn in sequence. In this embodiment, the upper needle forming a loop is shown as "∨" in the triangular arrangement diagram, the floating yarn is shown as "—" in the triangular arrangement diagram. Among them, when "—" is located in the upper needle cylinder, it is called the upper needle floating yarn, and when "—" is located in the lower needle cylinder, it is called the lower needle floating yarn. The lower needle forming a loop is shown as "∧" in the triangular arrangement diagram, and the lower needle gathering loop is shown as "︹" in the triangular arrangement diagram; the odd-numbered knitting paths feed the yarns for the surface layer (i.e., the front side of the fabric), and the even-numbered knitting paths feed the yarns for the inner layer (i.e., the back side of the fabric). In addition, in this embodiment, as Figure 2 shown, the numbers 1-20 at the bottom row of the number of columns in the figure refer to the 1-20 yarn weavings.

[0041] Through the arrangement of knitting needles, it can be effectively distinguished from the single arrangement of knitting needles in the prior art. By adopting the form of staggered circular arrangement of high and low heel needles, the two different knitting needle arrangement methods of the upper needle plate and the lower needle cylinder adopted in this application can effectively enhance the air permeability of the knitted fabric, improve the moisture absorption and quick-drying effect of the knitted fabric, and can also effectively simplify the structure of the knitting needle arrangement, improve the running efficiency of the knitting needles, and increase the production rate of the fabric. In addition, the lower needle cylinder cam arrangement in the cam arrangement adopts the form of cooperation between lower needle tucking, lower needle looping and float line. On the one hand, it is beneficial to make the woven fabric more breathable through the mutual cooperation with the knitting needles, and the participation of the lower needle tucking makes the pattern in the fabric more beautiful, facilitating the formation of a mesh-like effect on the front of the fabric. At the same time, the staggered arrangement of different yarns on the lower needles makes the cross-striped effect on the back of the fabric more obvious. On the other hand, the setting of the cam arrangement and its mutual cooperation with the knitting needle arrangement can effectively improve the skin-friendly effect of the fabric, ensure the comfortable feel of the fabric, and prevent the occurrence of uneven fabric.

[0042] A preparation process for a quick-drying and breathable knitted fabric. To prepare the described quick-drying and breathable knitted fabric, the process includes the following steps:

[0043] Step 1: Through experimental comparison, select the optimal configuration of the new moisture-absorbing and quick-drying filament and the formula of the dyeing and finishing auxiliaries. Among them, the new moisture-absorbing and quick-drying filament has a specification of 50D - 100D thick filament. The new moisture-absorbing and quick-drying filament is arranged on the front and back of the fabric, and the new moisture-absorbing and quick-drying filament is a new moisture-absorbing and quick-drying filament with cross-shaped grooves, multiple pores and treated with an expansion technology. The back of the fabric uses a special filament with a flat cross-section. The formula of the dyeing and finishing auxiliaries needs to be screened through experimental comparison to select the most suitable formula of the dyeing and finishing auxiliaries;

[0044] Step 2: Select a knitting device and select the matching method of the yarn according to the machine number of the knitting device for knitting;

[0045] Step 3: After knitting, perform dyeing and finishing treatment. Specifically: dye the fabric with dyeing and finishing auxiliaries;

[0046] Among them, in Step 3, the front of the knitted fabric after knitting has a mesh-like structure, and the back of the fabric is a cross-striped structure. In this embodiment, the setting of the shaping temperature T needs to be screened through experimental comparison to select the temperature suitable for the yarn structure used, and the specific value is set according to actual needs.

[0047] Through this process step, the new moisture-absorbing and quick-drying filament used has excellent moisture absorption and moisture conduction effects, which is beneficial to the moisture absorption and quick drying of the fabric, can effectively improve the air permeability and evaporation rate of the fabric. The setting of the flat filament enables the fabric to not only have the effect of quickly absorbing and drying moisture, but also have the characteristic of high air permeability. Through the setting of this process step, it is beneficial to enhance the quality and feel of the fabric, improve the abrasion resistance of the fabric, enhance the service life of the fabric and the durability of the air permeability effect, and also has the characteristics of being washable and having good durability of the moisture absorption and quick drying effect.

[0048] The dyeing and finishing process in step three includes:

[0049] Step S31: Open-width washing: After the fabric is woven, it is subjected to open-width washing treatment.

[0050] Step S32: Pre-setting: The fabric after open-width washing is pre-set to form a grey fabric. The temperature range for pre-setting is 170°C - 200°C, the fabric overfeed is 15% - 25%, and the pre-setting vehicle speed is 15 min - 25 min.

[0051] Step S33: Dyeing: The grey fabric is immersed in a dyeing vat with a liquor ratio of 1:10, using disperse dyes, and dyeing is carried out with segmented temperature control. After dyeing, reduction cleaning is carried out. Among them, the disperse dyes include: 2 - 3% of the dye, 1 - 2 g / L of the leveling agent, 0.3 - 0.5 g / L of sodium acetate, and HAC (pH 4.5 - 5); The segmented temperature control dyeing process is: heating from room temperature to 85°C at a rate of 0.65°C / min, holding for 5 min, then continuing to heat to 120°C at a rate of 0.85°C / min, holding for 40 - 50 minutes, and then cooling to 70°C at a rate of 0.85°C / min; The cleaning solution for reduction cleaning includes: 2 g / L of Na2CO3 and 2.5 g / L of sodium hydrosulfite.

[0052] Step S34: Re-setting: After the dyed grey fabric is taken out of the vat and dehydrated, re-setting is carried out to further shape the fabric to obtain the required fabric. Among them, the temperature range for fabric re-setting is 130°C - 150°C, the fabric overfeed is 10% - 20%, and the vehicle speed for re-setting is 20 - 30 m / min.

[0053] Through the settings of each process in the dyeing and finishing process of step three, it is beneficial to improve the plasticity of the fabric, enhance the aesthetics of the fabric, improve the quality of the fabric, and can also effectively prevent color fading, extend the service life of the fabric. Moreover, the settings of the two shaping temperatures, the vehicle speed during the shaping process, and the proportion of the dye components effectively prevent damage to the internal structure of the fabric during the dyeing and finishing process, and greatly ensure the quality of the fabric.

[0054] Step two includes the following steps:

[0055] Step S21: Analyze the prepared fabric structure and set the horizontal stripe mesh double-sided structure organization;

[0056] Step S22: Select a knitting device, combine the special properties of the yarn, and select the matching method of the yarn according to the gauge of the knitting device, and then carry out knitting.

[0057] Through the setting in Step 2, the entire surface of the fabric, i.e., the front side of the fabric, is entirely made of the new moisture-absorbing and quick-drying filament. A part of the back side of the fabric is made of the new moisture-absorbing and quick-drying filament, and the other part is made of flat filaments. While ensuring the feel of the fabric, it can also have a skin-friendly and comfortable effect. In addition, it can improve the evaporation rate and breathability of the fabric. Moreover, through the set horizontal stripe mesh double-sided structure organization, the surface of the fabric, i.e., the front side of the fabric, can effectively have a mesh-like structure, and the back side of the fabric has a horizontal stripe or crosswise stripe structure. While improving the aesthetics of the fabric, it further enhances the evaporation rate and the moisture-absorbing and quick-drying performance of the fabric. And for the knitted fabric obtained through this step, the pre-washing / post-washing evaporation rate can reach more than 0.35 g / h. Compared with the pre-washing / post-washing evaporation rate of 0.18 g / h specified in the national standard GB / T 21655.1-2008, the fabric prepared in this application has a significant improvement. And the air permeability reaches more than 2000 mm / s. In addition, the fabric also has better functions of moisture-absorbing and quick-drying, fluffy and breathable, and skin-friendly and refreshing, and the various effects of the fabric are more persistent.

[0058] In the present invention, for any knitted fabric, it may include the structure of a quick-drying and breathable knitted fabric described in this embodiment. And on the basis of the relevant structures and assembly relationships of the flat filaments and meshes provided in this embodiment, the knitted fabric also includes conventional components such as yarns and jacquards. Since they are all prior arts, no further description will be given here.

[0059] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A quick-drying and breathable knitted fabric, characterized in that, Adopt a knitting structure with two needle tracks on the upper needle disc and two needle tracks on the lower needle cylinder, and the fabric includes 20 yarn filaments arranged in a cycle. The 20 yarn filaments include a new type of moisture-absorbing and quick-drying filament and flat filaments. Among them, the 1st, 3rd, 5th, 7th, 9th, 11th, 13th, 15th, 17th, and 19th tracks are used to weave the front side of the fabric with the new type of moisture-absorbing and quick-drying filament, and the 2nd, 4th, 6th, 8th, 10th, 12th, 14th, 16th, 18th, and 20th tracks are used to weave the back side of the fabric with the new type of moisture-absorbing and quick-drying filament and flat filaments. The front side of the fabric includes concave parts and convex parts. The concave parts are woven by the 1st, 3rd, and 5th yarn filaments, and the convex parts are woven by the 7th, 9th, 11th, 13th, 15th, 17th, and 19th yarn filaments; Among them, the 2nd, 4th, 6th, and 8th yarn filaments on the back side of the fabric are flat filaments, and the 10th, 12th, 14th, 16th, 18th, and 20th yarn filaments on the back side of the fabric are the new type of moisture-absorbing and quick-drying filaments; the cross-section of the new type of moisture-absorbing and quick-drying filament has a cross-shaped special groove and pores; the flat filament is a special filament with a flat cross-section; The knitting structure of the 20 yarn filaments in the arrangement order from the upper needle disc to the lower needle cylinder is as follows: the 1st, 3rd, and 5th tracks are in turn upper needle forming a loop, upper needle forming a loop, lower needle floating yarn, and lower needle gathering loop; the 2nd, 4th, 6th, 8th, 10th, 12th, 14th, 16th, 18th, and 20th tracks are in turn upper needle floating yarn, upper needle floating yarn, lower needle forming a loop, and lower needle forming a loop; the 7th, 9th, 11th, 13th, 15th, 17th, and 19th tracks are in turn upper needle forming a loop, upper needle forming a loop, lower needle floating yarn, and lower needle floating yarn.

2. The quick-drying and breathable knitted fabric according to claim 1, wherein, At least one pore is provided in the new type of moisture-absorbing and quick-drying filament, and an expansion technology is used for the new type of moisture-absorbing and quick-drying filament to expand the free volume between the internal molecular chains of the fiber by 20 - 30 v / v%.

3. The quick-drying and breathable knitted fabric according to claim 2, characterized in that, The weight percentage of the yarn filaments arranged on the front side of the fabric is denoted as m%, and the weight percentage of the yarn filaments arranged on the back side of the fabric is denoted as n%, and |m% - n%| ≤ 30%.

4. The quick-drying and breathable knitted fabric according to claim 3, characterized in that, The yarn count range of the new type of moisture-absorbing and quick-drying filament is 50D - 100D.

5. The quick-drying and breathable knitted fabric according to claim 3, characterized in that, The yarn count range of the flat filament is 30D - 75D.

6. A quick-drying and breathable knitted fabric according to claim 1, characterized in that, The fabric is knitted by a double-sided knitting machine. The knitting needles on the upper needle disc of the double-sided knitting machine are arranged in a form of staggered high and low heel needles in a cycle, and the lower needle cylinder of the double-sided knitting machine is arranged in a form of 7 high heel needles and 1 low heel needle staggered in a cycle.

7. A preparation process of a quick-drying and breathable knitted fabric, characterized in that, Prepare a quick-drying and breathable knitted fabric according to any one of claims 1 - 6, and the process includes the following steps: Step 1: Through experimental comparison, screen out the optimal configuration of the new type of moisture-absorbing and quick-drying filament and the formula of the dyeing and finishing auxiliaries; Step 2: Select a knitting device, and select the matching method of the yarn filaments according to the machine number of the knitting device, and carry out knitting; Step 3: After knitting is completed, carry out dyeing and finishing treatment.

8. The preparation process of a quick-drying and breathable knitted fabric according to claim 7, characterized in that, The dyeing and finishing treatment process in Step 3 includes: Step S31: Open-width washing; Step S32: Preshrinking; Step S33: Dyeing; Step S34: Re-shrinking.

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