Double-sided vacuum air-permeable cool and strong elastic underwear fabric and production method thereof

Abstract

The application discloses a double-sided vacuum breathable cool strong elastic underwear fabric and a production method thereof. The fabric body comprises an upper vacuum layer, a lower vacuum layer and an intermediate connecting layer. The upper vacuum layer and the lower vacuum layer are connected through the intermediate connecting layer. The upper vacuum layer and the lower vacuum layer are both combined and knitted by using a 32-way weft plain needle structure mesh base layer and a 2-way vacuum mesh structure. The intermediate connecting layer is knitted and connected by using a 30-way over-and-under tuck structure. The upper vacuum layer and the lower vacuum layer use 40D / 34F round bright nylon FDY as main yarn, use 15D / 5F high-elastic semi-bright nylon DTY as vacuum mesh yarn and use 55D spandex as padding yarn. The intermediate connecting layer uses 55D spandex as connecting yarn. The double-sided vacuum breathable cool strong elastic underwear fabric has the advantages of vacuum mesh on both sides of the fabric body, excellent air permeability, good cool feeling, strong elasticity, high recovery, good cool effect, comfortable hand feeling, free cutting and no edge after washing.

Description

Technical Field

[0001] This invention belongs to the field of sports fabric technology, and in particular relates to a double-sided vacuum breathable, cool and elastic underwear fabric and its production method. Background Technology

[0002] With the development of textile technology, various underwear fabrics have flourished. Traditional underwear undergarment fabrics are made by bonding a piece of mesh fabric with another piece of elastic fabric, possessing strong elasticity. Newer underwear undergarment fabrics, however, use a tightly knitted, high-gauge spacer (spacer / air layer fabric) instead, offering short weft knitting and strong elasticity. While all these underwear undergarment fabrics possess the advantage of strong elasticity, they also have drawbacks such as being relatively thick and heavy, having insufficient breathability, feeling stuffy when worn, slightly less cooling, and not being able to be freely cut. Summary of the Invention

[0003] The purpose of this invention is to provide a double-sided vacuum breathable, cool, and highly elastic underwear fabric and its production method that can solve at least one of the above problems.

[0004] According to one aspect of the present invention, a double-sided vacuum breathable cooling and elastic underwear fabric is provided, comprising a fabric body, the fabric body including an upper vacuum layer, a lower vacuum layer and an intermediate connecting layer, the upper vacuum layer and the lower vacuum layer being connected by the intermediate connecting layer, both the upper vacuum layer and the lower vacuum layer being woven from a 32-way weft plain knit structure mesh base layer and a 2-way vacuum mesh structure, the intermediate connecting layer being woven from a 30-way upper and lower tuck knit, the upper vacuum layer and the lower vacuum layer using 40D / 34F round bright nylon FDY as the main yarn, 15D / 5F high elastic semi-bright nylon DTY as the vacuum mesh yarn, and 55D spandex as the padding yarn, the intermediate connecting layer using 55D spandex as the connecting yarn.

[0005] In some implementations, the weaving structure of the fabric body consists of 10 needles on each side in a cycle, with 96 rows / cycles forming a complete pattern effect.

[0006] In some embodiments, the stitch arrangement of the fabric body during knitting is as follows: a double-sided stitch arrangement is adopted, with the knitting stitches arranged in a cycle of 13121 41212 / 10 stitches and the purl stitches arranged in a cycle of 32121 24212 / 10 stitches.

[0007] In some implementations, the weaving methods of the fabric body are as follows: In the first row, the second needle of the needle plate knits in a loop, the fourth, sixth, eighth, and tenth needles knit in a clustered loop, and the first, third, fifth, seventh, and ninth needles do not knit; the first needle of the needle cylinder knits in a loop, the third, fifth, seventh, and ninth needles knit in a clustered loop, and the second, fourth, sixth, eighth, and tenth needles do not knit; this constitutes one of the vacuum mesh structures of the upper and lower vacuum layers; In row 52, ​​the 6th needle on the needle plate knits in a loop, the 2nd, 4th, 8th, and 10th needles knit in a clustered loop, and the 1st, 3rd, 5th, 7th, and 9th needles do not knit; the 7th needle on the needle cylinder knits in a loop, the 1st, 3rd, 5th, and 9th needles knit in a clustered loop, and the 2nd, 4th, 6th, 8th, and 10th needles do not knit; this constitutes the second vacuum mesh structure of the upper and lower vacuum layers; Routes 4, 10, 16, 22, 28, 34, 40, 46, 58, 64, 70, 76, 82, 88, and 94 employ a method of tucking odd-numbered needles together on the needle plate and leaving even-numbered needles unknitted, and leaving odd-numbered needles unknitted and tucking even-numbered needles together on the needle cylinder, forming one of the intermediate connecting layers; Routes 7, 13, 19, 25, 31, 37, 43, 49, 55, 61, 67, 73, 79, 85, and 91 employ a method where odd-numbered needles on the needle plate are not knitted and even-numbered needles are tucked together, and odd-numbered needles on the needle cylinder are tucked together and even-numbered needles are not knitted, thus forming the second intermediate connecting layer. Routes 2, 5, 8, 11, 14, 17, 20, 23, 26, 29, 32, 35, 38, 41, 44, 47, 50, 53, 56, 59, 62, 65, 68, 71, 74, 77, 80, 83, 86, 89, 92, and 95 employ a method where all needles on the needle plate knit in circles, while all needles on the needle cylinder do not knit, thus forming the upper vacuum mesh base layer; Routes 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63, 66, 69, 72, 75, 78, 81, 84, 87, 90, 93, and 96 employ a method where all needles on the cylinder knit in circles, while all needles on the needle plate remain unknitted, forming the lower vacuum mesh base layer.

[0008] In some embodiments, the weaving method of the fabric body is as follows: the first and 52nd threads are 15D / 5F high-elastic semi-dull nylon DTY vacuum mesh 2; the 4th, 10th, 16th, 22nd, 28th, 34th, 40th, 46th, 58th, 64th, 70th, 76th, 82nd, 88th, 94th, 7th, 13th, 19th, 25th, 31st, 37th, 43rd, 49th, 55th, 61st, 67th, 73rd, 79th, 85th, and 91st threads are 55D spandex connecting yarn; the remaining threads are 40D / 34F round bright nylon FDY main yarn and 55D spandex padding yarn.

[0009] In some implementations, the yarn feed of the fabric body is calculated as follows: based on the length of 100 loops, the main yarn is 210mm, the vacuum mesh yarn is 230mm, and the connecting yarn and padding yarn are both 76mm.

[0010] In some embodiments, the tension of each yarn in the fabric body is as follows: the main yarn of 40D / 34F round bright nylon FDY is controlled at 3~4cn; the main yarn of 15D / 5F high elastic semi-bright nylon DTY vacuum mesh yarn is controlled at 1~2cn; and the tension of 55D spandex connecting yarn and padding yarn are both controlled at 4cn.

[0011] According to another aspect of the present invention, a method for producing a double-sided vacuum breathable cooling elastic underwear fabric is provided, comprising the following steps: S1. Select a double-sided circular knitting machine with 36 needles, 38 inches, 96 rows, and a total of 4272*2 needles, with 4 rows on both the top and bottom. S2. The fabric body is woven in the selected circular knitting machine using the appropriate yarn, according to the knitting structure, needle arrangement, knitting method, doffing method and yarn feed amount, to obtain the fabric body. S3. The fabric body obtained by the above weaving is subjected to dyeing and finishing processes. The dyeing and finishing process is as follows: flat washing - degreasing in a setting machine - single vacuum dehumidification - high temperature initial setting - warp beam dyeing - post-setting.

[0012] In some embodiments, the initial high-temperature setting temperature in step S3 is 200~205℃, the machine speed is 12m / min, and the chain is set sequentially according to the following values ​​for the lower machine width: -30, -20, -10, 0, 0, 0, 0, 0. The lower machine width is controlled at 152~156cm, and the basis weight is controlled at 300~310g / m. 2 .

[0013] In some embodiments, during warp dyeing in step S3, acid dyes are used with a liquor ratio of 1:10-15. Then, leveling agent, acid-releasing agent, and dye are added, and the process is run for 5 minutes. The temperature is then increased to 98°C at a rate of 0.5-1.5°C / min and held for 30-45 minutes. The temperature is then decreased to 60°C at a rate of 1-2°C / min. Samples are taken for color matching, and the fabric is drained for color fixing. After post-setting in step S3, the fabric's final dimensions are a width of 152cm and a weight of 300g / m². 2 Fabric density: CPI 88-90, WPI 68-70.

[0014] The beneficial effects of this invention are: By selecting 40D / 34F round bright nylon FDY as the main yarn, the nylon yarn has good abrasion resistance and durability, good elasticity and resilience, and can closely fit the body. Nylon has good moisture absorption and strong wrinkle resistance, which can closely fit the body and provide a good shaping effect while maintaining comfort. 15D / 5F high-elastic semi-glossy nylon DTY is selected as the vacuum mesh yarn; and 55D spandex is selected as the connecting yarn 3 and padding yarn 4. The spandex with a large D number is used as the connecting yarn. With appropriate weaving technology and yarn feed, the required strong elasticity and resilience of the fabric can be guaranteed. By using high-temperature initial setting, the spandex layers of the upper, middle and lower layers are bonded together after high-temperature setting, so that the fabric can be cut and used in garments, and will not fray after multiple washes. Through the combination and changes of the above organizational structure, raw material selection, yarn feeding amount, etc., the initial double vacuum breathable style is formed. After corresponding dyeing and finishing processes, the double-sided vacuum breathable cool and strong elastic underwear fabric is obtained. The fabric of this invention has vacuum mesh on both sides, excellent breathability, good cooling sensation, strong elasticity, high recovery, good cooling effect, comfortable feel, can be freely cut, and does not fray after washing. It is a double-sided vacuum breathable cooling strong elastic underwear fabric. The fabric itself was tested using the ISO standard tensile method BS EN 14704-1 20N, with a longitudinal tensile strength of 40-60% and a transverse tensile strength of 80-100%, and a recovery rate of over 95% in both the longitudinal and transverse directions at 1 min and 30 min. In addition, the water vapor transmission rate of materials (ASTM E96-22) test showed a breathability of 2600g / SQ.M .24 HRS. The instantaneous cooling performance test (GB / T 35263-2017) showed a cooling Qmax value of 0.26 J / (cm2.s). Attached Figure Description

[0015] Figure 1 This is a knitting structure diagram of a double-sided vacuum breathable, cool, and highly elastic underwear fabric. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings.

[0017] Reference Figure 1A double-sided vacuum breathable, cooling, and highly elastic underwear fabric includes a fabric body comprising an upper vacuum layer, a lower vacuum layer, and an intermediate connecting layer. The upper and lower vacuum layers are connected by the intermediate connecting layer. Both the upper and lower vacuum layers are woven from a 32-way weft plain knit structure mesh base layer combined with a 2-way vacuum mesh structure. The intermediate connecting layer is woven from a 30-way up-and-down tuck knit. The upper and lower vacuum layers use 40D / 34F round bright nylon FDY (FULLY DRAWN YARN) as the main yarn, 15D / 5F high-elastic semi-bright nylon DTY (Draw Texturing Yarn) as the vacuum mesh yarn, and 55D spandex as the padding yarn. The intermediate connecting layer uses 55D spandex as the connecting yarn.

[0018] By selecting 40D / 34F round bright nylon FDY as the main yarn, the nylon yarn has good abrasion resistance and durability, good elasticity and resilience, and can closely fit the body. In addition, nylon has good moisture absorption and strong wrinkle resistance, which can closely fit the body and provide a good shaping effect while maintaining comfort. 15D / 5F high-elastic semi-glossy nylon DTY is selected as the vacuum mesh yarn. Then, 55D spandex is selected as the connecting yarn 3 and the padding yarn 4. The high denier spandex as the connecting yarn enables the fabric to achieve the required strong elasticity and resilience.

[0019] The fabric itself is woven with 10 needles on each side in a cycle, and 96 rows / cycles make up a complete pattern.

[0020] The fabric body is knitted using a double-sided knitting method, with the knit stitches arranged in a cycle of 13121 41212 / 10 stitches and the purl stitches arranged in a cycle of 32121 24212 / 10 stitches.

[0021] The various weaving methods of the fabric itself are as follows: In the first row, the second needle of the needle plate knits in a loop, the fourth, sixth, eighth, and tenth needles knit in a clustered loop, and the first, third, fifth, seventh, and ninth needles do not knit; the first needle of the needle cylinder knits in a loop, the third, fifth, seventh, and ninth needles knit in a clustered loop, and the second, fourth, sixth, eighth, and tenth needles do not knit; this constitutes one of the vacuum mesh structures of the upper and lower vacuum layers; In row 52, ​​the 6th needle on the needle plate knits in a loop, the 2nd, 4th, 8th, and 10th needles knit in a clustered loop, and the 1st, 3rd, 5th, 7th, and 9th needles do not knit; the 7th needle on the needle cylinder knits in a loop, the 1st, 3rd, 5th, and 9th needles knit in a clustered loop, and the 2nd, 4th, 6th, 8th, and 10th needles do not knit; this constitutes the second vacuum mesh structure of the upper and lower vacuum layers; Routes 4, 10, 16, 22, 28, 34, 40, 46, 58, 64, 70, 76, 82, 88, and 94 employ a method of tucking odd-numbered needles together on the needle plate and leaving even-numbered needles unknitted, and leaving odd-numbered needles unknitted and tucking even-numbered needles together on the needle cylinder, forming one of the intermediate connecting layers; Routes 7, 13, 19, 25, 31, 37, 43, 49, 55, 61, 67, 73, 79, 85, and 91 employ a method where odd-numbered needles on the needle plate are not knitted and even-numbered needles are tucked together, and odd-numbered needles on the needle cylinder are tucked together and even-numbered needles are not knitted, thus forming the second intermediate connecting layer. Routes 2, 5, 8, 11, 14, 17, 20, 23, 26, 29, 32, 35, 38, 41, 44, 47, 50, 53, 56, 59, 62, 65, 68, 71, 74, 77, 80, 83, 86, 89, 92, and 95 employ a method where all needles on the needle plate knit in circles, while all needles on the needle cylinder do not knit, thus forming the upper vacuum mesh base layer; Routes 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63, 66, 69, 72, 75, 78, 81, 84, 87, 90, 93, and 96 employ a method where all needles on the cylinder knit in circles, while all needles on the needle plate remain unknitted, forming the lower vacuum mesh base layer.

[0022] The weaving pattern of the fabric body is as follows: the first and 52nd threads are 15D / 5F high-elastic semi-glossy nylon DTY vacuum mesh 2; the 4th, 10th, 16th, 22nd, 28th, 34th, 40th, 46th, 58th, 64th, 70th, 76th, 82nd, 88th, 94th, 7th, 13th, 19th, 25th, 31st, 37th, 43rd, 49th, 55th, 61st, 67th, 73rd, 79th, 85th, and 91st threads are 55D spandex connecting yarn; the remaining threads are 40D / 34F round bright nylon FDY main yarn and 55D spandex padding yarn.

[0023] Yarn feed rate of the fabric body: calculated based on the length of 100 loops, the main yarn is 210mm, the vacuum mesh yarn is 230mm, and the connecting yarn and padding yarn are both 76mm.

[0024] The tension of each yarn in the fabric body is as follows: 40D / 34F round bright nylon FDY main yarn is controlled at 3~4cn; 15D / 5F high elastic semi-bright nylon DTY vacuum mesh yarn is controlled at 1~2cn; 55D spandex connecting yarn and padding yarn are both controlled at 4cn.

[0025] A method for producing a double-sided vacuum breathable, cooling, and highly elastic underwear fabric includes the following steps: S1. Select the Yonglitai YLD34 model, a double-sided circular knitting machine with 36 needles, 38 inches, 96 rows, and a total of 4272*2 needles, with 4 rows on both the top and bottom. When knitting fabric on this circular knitting machine, the machine speed is 12 revolutions per minute, which makes the woven fabric have a delicate and high-end texture, and can also realize the double-sided vacuum style of this invention. S2. The fabric body is woven in the selected circular knitting machine using the appropriate yarn, according to the knitting structure, needle arrangement, knitting method, doffing method and yarn feed amount, to obtain the fabric body. During the weaving process, the resulting fabric greige, which contains approximately 40% spandex, cannot be stacked arbitrarily. Each greige fabric must be placed individually suspended on an iron frame without any compression to prevent quality issues such as creases, fabric surface damage, and water ripples.

[0026] S3. The fabric body obtained by the above weaving is subjected to dyeing and finishing processes. The dyeing and finishing process is as follows: flat washing - degreasing in a setting machine - single vacuum dehumidification - high temperature initial setting - warp beam dyeing - post-setting.

[0027] In the above steps, the flat-width washing process involves adding degreasing agent and soda ash to 250 liters of water. The temperature of the washing tank is set to 95℃ and the speed is 15 meters / min. This process removes oily substances from the fabric yarns and the fabric produced during the weaving process. After the fabric is washed and degreased, it is rolled up using a roll A.

[0028] After washing, the fabric undergoes a final degreasing process in a setting machine, followed by single-vacuum moisture absorption and high-temperature initial setting. Because the fabric of this invention has a high spandex content and a significant amount of oil on its surface, further degreasing is required after washing. This involves setting the fabric in a setting machine, where commonly used degreasing agents and soda ash are added to the setting machine's feed tank. The washing tank temperature is set to 95°C, and the speed is 12 m / min, to further remove oily substances from the fabric yarns and the weaving process. After setting the fabric in the setting machine, a single-vacuum moisture absorption process is performed using a vacuum pump at a speed of 1200 rpm / min. This allows for rapid absorption of residual oil and degreasing agents from the fabric, resulting in an extremely low oil content, reducing the risk of fabric damage and additive stains, and preparing the fabric for high-temperature initial setting.

[0029] After vacuum dehumidification, the product undergoes high-temperature initial setting in a setting machine. During this process, 30 g / L of an anti-yellowing agent (such as an anti-phenolic yellowing agent) is added to the second material tank of the setting machine. The initial setting temperature is 200-205℃; specifically, 200℃ or 205℃ can be selected. The machine speed is 12 m / min, and the chain is set sequentially according to the following values ​​for the lower machine width: -30, -20, -10, 0, 0, 0, 0. The lower machine width is controlled at 152-156 cm, and the weight is controlled at 300-310 g / m². 2By employing the aforementioned chain configuration, the fabric surface is crack-free and more uniform. Simultaneously, the high-temperature initial setting at approximately 205℃ ensures better bonding of the three spandex layers (top, middle, and bottom), guaranteeing no frayed edges after any cut. After high-temperature initial setting, the fabric's width at the end of the weave is controlled at 152-156cm, and the weight at 300-310g / m². 2 .

[0030] After the fabric undergoes high-temperature initial setting, warp dyeing is performed. In step S3, acid dyes are used for warp dyeing at a liquor ratio of 1:10-15. Then, leveling agent, acid-releasing agent, and dye are added, and the mixture is run for 5 minutes. The temperature is then increased to 98°C at a rate of 0.5-1.5°C / min and held for 30-45 minutes. The holding time can be 30, 40, or 45 minutes depending on actual production requirements to ensure uniform dyeing. Then, the temperature is reduced to 60°C at a rate of 1-2°C / min, and samples are taken for color matching and color fixing by draining water. The acid dye, leveling agent, acid-releasing agent, and dye are conventional preparations used in existing fabric dyeing processes and are not specially treated here.

[0031] After dyeing, post-setting is immediately arranged, and 30g / L of hydrophilic softening agent is added to the post-setting tank to make the fabric smoother, more stable, and give it a certain hand feel. The post-setting includes the following setting parameters: temperature: 180℃, machine speed: 25m / min; the width of the fabric after post-setting is 152cm, the weight is 300g / m2, and the fabric density is cpi (Cross Parallel Index) 88~90 and wpi (Weft Parallel Index) 68~70.

[0032] Through the combination and changes of the above organizational structure, raw material selection, yarn feeding amount, etc., the initial double vacuum breathable style is formed. Then, through the special dyeing and finishing process in this production method, the double-sided vacuum breathable cool and strong elastic underwear fabric of this invention is obtained. The finished fabric body obtained by this invention has the following advantages: it has vacuum mesh on both sides, excellent breathability, good cooling sensation, strong elasticity, high recovery, good cooling effect, comfortable hand feel, and can be freely cut into double-sided vacuum breathable cool and strong elastic underwear fabric.

[0033] The fabric obtained by this production method, when tested by the ISO standard tensile method BS EN 14704-1 20N, showed a longitudinal tensile strength of 40-60% and a transverse tensile strength of 80-100%, with recovery rates of over 95% in both the longitudinal and transverse directions at 1 minute and 30 minutes. Furthermore, the watervapor transmission rate of materials (ASTM E96-22) test showed a breathability of 2600 g / sQ.M .24 HRS. In the instantaneous cooling performance test (GB / T 35263-2017), the cooling Qmax value was 0.26 J / (cm2.s).

[0034] This invention relates to a double-sided vacuum breathable, cooling, and highly elastic underwear fabric. Through the above-mentioned weaving process, the fabric structure, triangular arrangement, and cyclical changes in the knitting needles are designed to achieve a double-sided vacuum style. Combined with appropriate raw materials, yarn feed, and special dyeing and finishing processes, this invention has at least the following advantages: vacuum mesh on both sides, excellent breathability, good cooling sensation, strong elasticity, high recovery, excellent cooling effect, comfortable hand feel, can be freely cut, and does not fray after washing.

[0035] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A double-sided vacuum breathable, cooling, and highly elastic underwear fabric, characterized in that, The fabric body includes an upper vacuum layer, a lower vacuum layer, and an intermediate connecting layer. The upper and lower vacuum layers are connected by the intermediate connecting layer. Both the upper and lower vacuum layers are woven from a 32-way weft plain knit structure mesh base layer and a 2-way vacuum mesh structure. The intermediate connecting layer is woven from a 30-way tuck knit. The upper and lower vacuum layers use 40D / 34F round bright nylon FDY as the main yarn, 15D / 5F high-elastic semi-bright nylon DTY as the vacuum mesh yarn, and 55D spandex as the padding yarn. The intermediate connecting layer uses 55D spandex as the connecting yarn.

2. The double-sided vacuum breathable, cooling, and highly elastic underwear fabric according to claim 1, characterized in that, The weaving structure of the fabric body consists of 10 needles on each side in a cycle, with 96 rows / cycles forming a complete pattern effect.

3. The double-sided vacuum breathable, cooling, and highly elastic underwear fabric according to claim 2, characterized in that, The fabric body is knitted using a double-sided knitting method, with the knitting pattern being: 13121 41212 / 10 stitches per cycle and the purl stitches being: 32121 24212 / 10 stitches per cycle.

4. The double-sided vacuum breathable, cooling, and highly elastic underwear fabric according to claim 3, characterized in that, The weaving methods of the fabric body are as follows: In the first row, the second needle of the needle plate knits in a loop, the fourth, sixth, eighth, and tenth needles knit in a clustered loop, and the first, third, fifth, seventh, and ninth needles do not knit; the first needle of the needle cylinder knits in a loop, the third, fifth, seventh, and ninth needles knit in a clustered loop, and the second, fourth, sixth, eighth, and tenth needles do not knit; this constitutes one of the vacuum mesh structures of the upper and lower vacuum layers; In row 52, ​​the 6th needle on the needle plate knits in a loop, the 2nd, 4th, 8th, and 10th needles knit in a clustered loop, and the 1st, 3rd, 5th, 7th, and 9th needles do not knit; the 7th needle on the needle cylinder knits in a loop, the 1st, 3rd, 5th, and 9th needles knit in a clustered loop, and the 2nd, 4th, 6th, 8th, and 10th needles do not knit; this constitutes the second vacuum mesh structure of the upper and lower vacuum layers; Routes 4, 10, 16, 22, 28, 34, 40, 46, 58, 64, 70, 76, 82, 88, and 94 employ a method of tucking odd-numbered needles together on the needle plate and leaving even-numbered needles unknitted, and leaving odd-numbered needles unknitted and tucking even-numbered needles together on the needle cylinder, forming one of the intermediate connecting layers; Routes 7, 13, 19, 25, 31, 37, 43, 49, 55, 61, 67, 73, 79, 85, and 91 employ a method where odd-numbered needles on the needle plate are not knitted and even-numbered needles are tucked together, and odd-numbered needles on the needle cylinder are tucked together and even-numbered needles are not knitted, thus forming the second intermediate connecting layer. Routes 2, 5, 8, 11, 14, 17, 20, 23, 26, 29, 32, 35, 38, 41, 44, 47, 50, 53, 56, 59, 62, 65, 68, 71, 74, 77, 80, 83, 86, 89, 92, and 95 employ a method where all needles on the needle plate knit in circles, while all needles on the needle cylinder do not knit, thus forming the upper vacuum mesh base layer; Routes 3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63, 66, 69, 72, 75, 78, 81, 84, 87, 90, 93, and 96 employ a method where all needles on the cylinder knit in circles, while all needles on the needle plate remain unknitted, forming the lower vacuum mesh base layer.

5. The double-sided vacuum breathable, cooling, and highly elastic underwear fabric according to claim 4, characterized in that, The doffing method of the fabric body is as follows: the first and 52nd rows use 15D / 5F high-elastic semi-glossy nylon DTY vacuum mesh 2; the 4th, 10th, 16th, 22nd, 28th, 34th, 40th, 46th, 58th, 64th, 70th, 76th, 82nd, 88th, 94th, 7th, 13th, 19th, 25th, 31st, 37th, 43rd, 49th, 55th, 61st, 67th, 73rd, 79th, 85th, and 91st rows use 55D spandex connecting yarn; the remaining rows use 40D / 34F round bright nylon FDY main yarn and 55D spandex padding yarn.

6. The double-sided vacuum breathable cooling and elastic underwear fabric according to claim 5, characterized in that, The yarn feed of the fabric body is calculated based on the length of 100 loops: the main yarn is 210mm, the vacuum mesh yarn is 230mm, and the connecting yarn and padding yarn are both 76mm.

7. The double-sided vacuum breathable cooling and elastic underwear fabric according to claim 6, characterized in that, The tension of each yarn in the fabric body is as follows: the main yarn of 40D / 34F round bright nylon FDY is controlled at 3~4cn; the yarn of 15D / 5F high elastic semi-bright nylon DTY vacuum mesh is controlled at 1~2cn; and the yarn of 55D spandex connecting yarn and padding yarn are both controlled at 4cn.

8. The method for producing a double-sided vacuum breathable, cooling, and highly elastic underwear fabric as described in claim 7, characterized in that, Includes the following steps: S1. Select a double-sided circular knitting machine with 36 needles, 38 inches, 96 rows, and a total of 4272*2 needles, with 4 rows on both the top and bottom. S2. The fabric body is woven in the selected circular knitting machine using the appropriate yarn, according to the knitting structure, needle arrangement, knitting method, doffing method and yarn feed amount, to obtain the fabric body. S3. The fabric body obtained by the above weaving is subjected to dyeing and finishing processes. The dyeing and finishing process is as follows: flat washing - degreasing in a setting machine - single vacuum dehumidification - high temperature initial setting - warp beam dyeing - post-setting.

9. The method for producing a double-sided vacuum breathable, cooling, and highly elastic underwear fabric according to claim 8, characterized in that, In step S3, the initial high-temperature setting temperature is 200~205℃, the machine speed is 12m / min, and the chain is set sequentially according to the following lower machine widths: -30, -20, -10, 0, 0, 0, 0, 0. The lower machine width is controlled at 152~156cm, and the weight is controlled at 300~310g / m. 2 .

10. The method for producing a double-sided vacuum breathable, cooling, and highly elastic underwear fabric according to claim 9, characterized in that, In step S3, acid dyes are used for warp dyeing at a liquor ratio of 1:10-15. Then, leveling agent, acid-releasing agent, and dye are added, and the mixture is run for 5 minutes. The temperature is then increased to 98℃ at a rate of 0.5-1.5℃ / min and held for 30-45 minutes. The temperature is then decreased to 60℃ at a rate of 1-2℃ / min. Samples are taken for color matching, and the fabric is drained for color fixing. After post-setting in step S3, the fabric's final dimensions are a width of 152cm and a weight of 300g / m². 2 Fabric density: CPI 88-90, WPI 68-70.

Images