Process for waterproofing a nylon warp-knitted fabric

Abstract

The present application relates to the technical field of textile fabric production, in particular to a nylon warp-knitted fabric waterproof production process, which aims to overcome the defects of fragile waterproof layer and tension control in the prior art, and is mainly realized by the following technical scheme: a nylon warp-knitted fabric waterproof production process, the knitted fabric is a double-layer structure and is made of nylon and spandex blended yarn, the knitted fabric waterproof production process includes steps such as knitted fabric weaving, oil removal refining, pretreatment setting, dyeing, post-treatment setting and finished product inspection, the overall structure adopts two-needle weaving and high-needle high-drawing weaving, the density of the fabric is improved through four directions of machine type, weaving conditions, high-elasticity yarn and post-processing, so that the fabric has good waterproof effect, the tension is relaxed during the drying and padding process, the fabric is prevented from being continuously in a tight state, and the quality of the fabric finished product is improved.

Description

Technical Field

[0001] This invention relates to the field of textile fabric production technology, specifically to a waterproof production process for nylon warp-knitted fabrics. Background Technology

[0002] As people's living standards continue to improve, their demands for the comfort and functionality of clothing are also increasing. Warp-knitted fabrics, as an indispensable part of daily life, are also facing new requirements for further enhancing their functionality. Waterproofing is one of the emerging pursuits in new fabrics.

[0003] Existing technologies often use nylon materials to produce waterproof fabrics through warp knitting. The waterproof performance of nylon knitted fabrics relies on their inherent material properties and coating treatments. Nylon has fine capillaries, and its dense fiber structure effectively prevents water penetration, making it a relatively closed material structure. Coating treatments can increase the fabric's sealing and abrasion resistance. The waterproof effect of nylon knitted fabrics is significantly affected by factors such as fabric density and coating treatment. Although existing waterproof knitted fabrics are made with high-strength yarns, the surface waterproof layer is relatively fragile, and both the fabric and the waterproof layer are easily affected by tearing or abrasion. Furthermore, increasing yarn strength or changing yarn materials can also affect the fabric's comfort and skin-friendly feel. Knitted fabrics are mostly lightweight and thin, making them highly susceptible to tension during transport, which can lead to abnormal stretching or even breakage. Therefore, tension control is necessary during the impregnation process. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of fragile waterproof layer and tension control in the prior art, thereby providing a waterproof production process for nylon warp-knitted fabrics.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0006] A waterproof production process for nylon warp-knitted fabrics, wherein the knitted fabric has a double-layer structure and is made of a blend of nylon and spandex, with a spandex content of 10-30%. The waterproof production process includes the following steps: knitting, degreasing and refining, pretreatment and setting, dyeing, post-treatment and setting, and finished product inspection; the specific operations are as follows:

[0007] Knitted fabric weaving: Knitted fabrics are woven from blended yarn materials and knitted on warp knitting machines with a warp strength of 36G or higher;

[0008] Degreasing and refining: The finished knitted fabric enters the refining machine for refining. The knitted fabric is heat-treated in the refining tank. 1.0-3.0 g / L of high-efficiency degreasing agent, 0.5-2 g / L of chelating dispersant, and 4-8 g / L of caustic soda are added to the refining tank, and the temperature is controlled not to exceed 85℃. Then, it is thoroughly washed in a water washing tank at 40-60℃ at a speed of 20-30 m / min. The main tank temperature of the refining tank is 40℃, 75℃, and 85℃ in sequence, and the water washing tank temperature is 60℃, 50℃, and 40℃ in sequence.

[0009] Pretreatment and setting: After refining, the knitted fabric is heated and set at the pretreatment and setting point. The setting temperature is 180-200℃ and the speed is 20-30m / min.

[0010] Dyeing: Knitted fabrics are dyed using overflow dyeing equipment. The liquor ratio is 1:8. Leveling agent and softener are added at room temperature and the process is run for 5-10 minutes. The temperature is then increased from 30℃ to 70℃ over 30 minutes, and held at 90℃-95℃ for 20-40 minutes. The temperature is then reduced to 60℃ over 20 minutes. The liquor is changed and drained three times. Fixing agent is added to the dyeing tank, and the dyed knitted fabric is immersed in the dyeing tank. The temperature is increased again from 30℃ to 80℃ over 20 minutes, and held for 15-30 minutes. The liquor is changed and drained twice. After adding soaping agent, the temperature is increased to 60℃ and held for 15-30 minutes. The fabric is then cooled, drained, and washed, and then discharged through the fabric discharge device.

[0011] Post-treatment and setting: Post-treatment and setting equipment is used for post-treatment and setting, and the post-treatment and setting steps include a resin padding process and a finishing and setting process. The resin padding process uses a padding device, and the finishing and setting process uses a setting device. After two passes and one pass in the resin padding process, the fabric enters the finishing and setting process. The resin padding process also includes a vacuum adsorption step. After that, the knitted fabric with excess padding is placed on the setting device for baking. The baking temperature is 140-160℃ and the baking time is 60-80 seconds.

[0012] Finished product inspection: Finished knitted fabrics are sorted, rolled up, and samples are cut for inspection.

[0013] By adopting the above technical solutions, the double-layer knitted fabric made of nylon material has excellent skin-friendliness. Through finishing and setting processes, it exhibits good tear resistance and prevents scratches. The use of fluorine-free water-repellent agents during production gives the fabric a strong water-repellent effect. Tension control during dyeing and finishing processes reduces the impact of stretching on the knitted fabric. After finishing and setting, the finished knitted fabric has a soft hand feel, a smooth surface, and excellent waterproof performance. The overflow dyeing equipment uses a low liquor ratio and low tension dyeing method, which allows the fabric to fully shrink and controls the resulting fabric to have high smoothness and a strong sense of density.

[0014] Furthermore, the knitted fabric is woven with two guide bars, and the working layer is a loop extension yarn surface. The structure of the first guide bar GB1 is 0-1 / 2-1 / 3-2 / 1-2 / / , and the structure of the second guide bar GB2 is 0-1 / 2-1 / 3-2- / 1-2 / / . Both the first guide bar GB1 and the second guide bar GB2 are fully threaded. The first guide bar GB1 uses 40-24F semi-dull fully stretched nylon yarn with a nylon content of 77-81%, and the second guide bar GB2 uses 40D spandex yarn with a spandex content of 19-23%.

[0015] By adopting the above technical solution, the nylon uses 40D-24F semi-dull fully stretched yarn, and the spandex uses Hyosung's 40D high-elasticity, high-temperature resistant product. This spandex, with the support of special polymerization technology, has excellent plasticity and compressibility. The specified warping machine for the spandex is the Karl Mayer spandex warping machine, with a spandex elongation ratio of 70%. The spandex is embedded in the middle of the nylon, which protects the spandex and enhances the abrasion resistance of the fabric surface. In addition, the specific structure avoids the shortcomings of poor abrasion resistance and exposed spandex in general spandex fabrics. At the same time, the single yarn material used in the processing avoids the impact on the water-repellent effect after the yarn is piled up, thus ensuring the stability of the fabric's water-repellent effect.

[0016] Furthermore, the transverse density of the knitted fabric is 78-82 / inch, the longitudinal density is 130-140 / inch, and the transverse diameter of the basic structural unit loop of the knitted fabric is 317µm, while the longitudinal diameter is 192µm.

[0017] By adopting the above technical solutions, the fabric has high density in both the transverse and longitudinal directions, small gaps between loops, and the 34A mechanism is used for crimping. The crimping path is longer than that of 34B and 34E, which eliminates the stress of the greige fabric more thoroughly and avoids problems such as uneven dyeing. An edge expander can be equipped during crimping to prevent edge curling.

[0018] Furthermore, the resin solution in the post-treatment and setting step is prepared as follows: 20-50 g / L of polyurethane superhydrophilic finishing agent, 1-5 g / L of nonionic surfactant complex, 5-15 g / L of organic sulfur-based antibacterial agent, and finally, citric acid is added to adjust the pH of the resin solution to 4.5-6.0.

[0019] By adopting the above technical solution, the resin and fabric fibers undergo a cross-linking reaction at high temperature, and are fully cured on the surface of the fabric fibers, thereby improving the durability of the knitted fabric.

[0020] Furthermore, the overflow dyeing equipment is equipped with a post-treatment and setting device at the discharge end. The overflow dyeing equipment includes a dyeing tank, a dye tank, a spraying mechanism, and an atomizer. The dye tank and the atomizer are both located on one side of the dyeing tank. The dye tank is connected to the atomizer, and the atomizer is connected to the dyeing tank through a liquid delivery pipe. The spraying mechanism is located on the dyeing tank. The dyeing tank also has multiple discharge ports on the side near the post-treatment and setting device. A fabric discharge device is located outside the discharge ports. The post-treatment and setting device includes a drying device, a padding device, and a setting device arranged in sequence. The drying device includes a drying box and multiple drying rollers that are positioned and rotated inside the drying box. The padding device includes a padding tank, a padding frame, a first padding assembly, and a second padding assembly. The first padding assembly and the second padding assembly are both arranged along the width direction of the padding frame and are mounted on the padding frame at both ends. The padding tank is located inside the lower part of the padding frame. The setting device is a setting machine and is located at the discharge end of the padding device.

[0021] By adopting the above technical solution, after the knitted fabric is woven, degreased, refined, and pretreated, it is sent to the overflow dyeing equipment for dyeing. Then, the dyed fabric is sent to the post-treatment and setting equipment for drying, padding, and setting in sequence. After dyeing, the fabric is conveyed and relaxed through the fabric exit device, and the fabric is shaken to put it in a tension-free state. Then, the fabric is immersed and rolled by the first padding component and the second padding to ensure contact and penetration between the padding bath and the fabric, ensuring the subsequent roll-off rate, thereby ensuring the quality of the finished fabric. When the fabric is dyed and exited, the fabric exit device shakes to reduce the surface heat of the fabric and reduce the internal stress of the fabric, relieving the tension of the fabric in the dyeing tank, which facilitates the tension stretching operation during padding and drying, and avoids the fabric being in a state of continuous tension.

[0022] Furthermore, the fabric feeding device includes a hot drying assembly and a fabric feeding assembly. The hot drying assembly includes a hot drying cylinder and a hot drying rack. The two ends of the hot drying cylinder are rotatably mounted on the hot drying rack. The hot drying rack is arranged along the length of the dyeing cylinder, and a partition plate is also provided along the length of the hot drying rack corresponding to the outlet position. The fabric feeding assembly includes a fabric feeding roller, a fabric feeding roller, and a fabric feeding drive component. The fabric feeding roller, fabric feeding roller, and fabric feeding drive component are all mounted on the hot drying rack. The fabric feeding roller and fabric feeding roller are parallel to the axis of the hot drying cylinder, and the fabric feeding roller is mounted above one side of the fabric feeding roller. The fabric feeding drive component controls the rotation of the fabric feeding roller. The fabric feeding drive component includes a connecting roller, The device comprises two fabric feeding worm gears, two fabric feeding worm wheels, two fabric feeding frames, and two fabric feeding motors. The connecting roller is parallel to the axis of the fabric feeding roller and arranged laterally. The two ends of the connecting roller are rotatably mounted on the heating rack and connected to the two ends of the fabric feeding roller through the fabric feeding frames. The fabric feeding worm wheel is coaxial with the connecting roller and is mounted at both ends of the connecting roller. The axis of the fabric feeding worm gear is perpendicular to the axis of the fabric feeding worm wheel and meshes with the fabric feeding worm wheel. The fabric feeding motor is mounted on the heating rack and drives the fabric feeding worm gear to rotate. The fabric output device also includes a storage box, which is located at the output end of the fabric feeding assembly and is used to receive and store the fabric output by the fabric feeding assembly.

[0023] By adopting the above technical solution, the hot drying component performs preliminary hot drying on the dyed fabric to reduce excessive moisture carried into the padding device, thereby reducing subsequent drying energy consumption. After the fabric is dried in contact with the hot drying roller, it is then shaken and transferred by the fabric handling component to avoid overheating during continuous drying, which could cause the fabric to scorch. The fabric handling roller is driven by the fabric handling drive component. Under the control of the fabric handling motor (which is a forward and reverse motor), the fabric handling worm rotates, driving the fabric handling worm wheel meshing with it to rotate. Because the fabric handling worm rotates forward and reverse, the fabric handling gear rotates forward and reverse, and the fabric handling frame integrated with the fabric handling worm wheel swings up and down, thereby driving the fabric handling roller on the fabric handling frame to swing up and down. Then, the fabric that passes between the output roller and the fabric handling roller is also conveyed and shaken before being piled up in the storage box, completing the fabric output operation.

[0024] Furthermore, a fabric guiding assembly is provided in front of the drying device. The fabric guiding assembly is located near the storage box. The fabric guiding assembly includes multiple feeding rollers, feeding frames at both ends, multiple fabric guiding rollers, fabric guiding tracks at both ends, and fabric guiding frames at both ends. The feeding rollers are rotatably mounted on the feeding frames at both ends and are staggered vertically. The fabric guiding tracks are set on the fabric guiding frames and are a circulating conveying structure. The height of the side of the fabric guiding track near the drying device is higher than the height of the side of the fabric guiding track away from the drying device. All fabric guiding rollers are vacuum adsorption rollers. The axis of the fabric guiding rollers is parallel to the axis of the feeding rollers and is arrayed on the fabric guiding tracks. The fabric guiding rollers slide along the outer periphery of the fabric guiding tracks.

[0025] By adopting the above technical solution, the fabric piled in the storage box is guided into the drying device by the fabric guiding assembly. The fabric guiding assembly first flattens and guides the stacked fabric through the fabric feeding roller and the fabric feeding frame, and then the fabric is attracted by the fabric guiding roller and driven to slide into the drying device. During the conveying process of the fabric guiding roller, the fabric can be avoided from being stretched by tension, thereby reducing the possibility of abnormal stretching or even breakage of the fabric and providing convenience for lighter and thinner fabrics, reducing the possibility of left and right deviation during the conveying process.

[0026] Furthermore, an inlet is provided in the middle of the side of the drying box near the fabric feeding assembly. Guide rollers are provided on both the inner and outer sides of the inlet. The guide rollers are all arranged along the width direction of the drying box and are rotatably mounted on the drying box at both ends. A bending roller is also provided on one side of the bottom of the drying box. The axis of the bending roller is parallel to the axis of the guide roller and is rotatably mounted on the drying box at both ends. The drying rollers are all arranged in the drying box. Two adjacent drying rollers are arranged alternately. An outlet is provided on the top of the drying box near the padding device. Outlet rollers parallel to the axis of the drying rollers are provided on both the inner and outer sides of the outlet.

[0027] By adopting the above technical solution, the fabric flattened by the fabric feeding assembly enters the drying chamber through the inlet. The drying rollers inside the drying chamber are arranged in an alternating manner to make the fabric serpentine and increase its drying stroke, thereby reducing the amount of water carried by the fabric into the padding device, which dilutes the padding liquid and affects the subsequent padding effect.

[0028] Furthermore, the first padding assembly includes a first immersion assembly and a first coating assembly. The first immersion assembly includes a first immersion drive and multiple first immersion rollers. The first immersion drive controls the first immersion rollers to rotate synchronously. The first immersion rollers are arranged along the width of the padding tank and are rotatably mounted at both ends within the padding tank. The first coating assembly includes a transverse coating component and a longitudinal coating component. The transverse coating component includes a set of staggered coating rollers. The longitudinal coating component includes a coating frame, a coating plate, and a blade drive. A vacuum adsorption device is also provided between the transverse and longitudinal coating components. The second padding assembly includes a second immersion assembly and a second padding assembly. The second immersion assembly includes a second immersion drive and multiple second immersion rollers. The second immersion drive controls the second immersion rollers to rotate synchronously. The second immersion rollers are arranged along the width of the padding tank and are rotatably mounted at both ends within the padding tank. The second padding assembly includes multiple sets of vertically parallel padding rollers. The axis of the padding rollers is parallel to the axis of the second immersion rollers.

[0029] By adopting the above technical solution, the first padding component performs a single padding operation on the fabric, the first coating component provides a fine and uniform resin solution for the first padding operation, the first coating component effectively reduces the residue from the first padding operation through dual-direction coating to avoid affecting the second padding operation, and a vacuum adsorption device is set between the two padding operations to absorb water and remove water and impurities from the fabric surface, so that the fabric can be better subjected to the second padding operation.

[0030] Furthermore, the coating roller is arranged along the width direction of the dip-rolling tank and is rotatably mounted on the dip-rolling frame at both ends. A spiral coating coil is sleeved on the coating roller. The coating coil is symmetrically arranged about the center line of the coating roller in the length direction and the rotation direction of the coating coil at both ends is opposite. The coating frame is slidably arranged relative to the dip-rolling frame in the width direction. The coating plate is fixed at the bottom of the coating frame. Sliding grooves are opened on the coating frame near both ends. The scraper drive is arranged at both ends of the coating frame. The scraper drive at each end includes a rotating cam and a scraper drive motor. The scraper drive motor controls the rotation of the rotating cam. The axis of the rotating cam is vertically arranged and the rotating cams at both ends are staggered.

[0031] By adopting the above technical solution, the coating roller coats the upper and lower surfaces along the fabric travel direction, controls the resin residue rate, and the coating coil can select the corresponding density according to the coating fineness and residue rate; the coating frame drives the coating plate to move perpendicular to the fabric travel direction, thereby realizing longitudinal coating of the upper surface of the fabric, ensuring that the resin is thin enough and penetrates into the fabric in one impregnation, reducing surface protrusions and facilitating secondary impregnation operations.

[0032] In summary, the technical solution of the present invention has the following advantages:

[0033] 1. The waterproof production process of nylon warp-knitted fabric provided by the present invention provides a double-layer structure of nylon material knitted fabric with good skin-friendliness. Through finishing and shaping process, it has good tear resistance and prevents scratches. In the production process, a fluorine-free water-repellent agent is used to finish the fabric, which has a strong water-repellent effect. After finishing and shaping, the finished knitted fabric has a soft hand feel, a smooth surface and excellent waterproof effect.

[0034] 2. The waterproof production process for nylon warp-knitted fabrics provided by the present invention reduces the surface heat of the fabric and lowers the internal stress of the fabric by shaking the fabric output device during the dyeing process, thereby easing the tension of the fabric in the dyeing vat and facilitating the tension stretching operation during the padding and drying processes, thus avoiding the fabric being in a state of continuous tension.

[0035] 3. The waterproof production process for nylon warp-knitted fabrics provided by the present invention sets up two padding operations to better control the fabric's roll-off rate. In addition, a vacuum adsorption device is set up between the two padding operations to absorb water and remove water and impurities from the fabric surface, so as to smoothly connect the two padding operations, reduce the impact of the previous process, and provide a better foundation for the subsequent process. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is a weave diagram of a nylon warp-knitted fabric provided in one embodiment of the present invention;

[0038] Figure 2 This is a diagram showing water leakage confirmation on the reverse side of a nylon warp-knitted fabric, provided in one embodiment of the present invention.

[0039] Figure 3 This is a schematic diagram of the overall structure of a waterproof production process for nylon warp-knitted fabrics provided in one embodiment of the present invention;

[0040] Figure 4 This is a partial structural schematic diagram of a fabric dispensing device provided in one embodiment of the present invention;

[0041] Figure 5 This is a partial structural diagram of a post-processing and shaping device provided in one embodiment of the present invention;

[0042] Figure 6 This is a partial structural schematic diagram of the impregnation and rolling apparatus provided in one embodiment of the present invention;

[0043] Figure 7 This is a partial exploded structural diagram of the impregnation and rolling apparatus provided in one embodiment of the present invention.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Overflow dyeing equipment; 11. Dyeing vat; 111. Discharge port; 12. Dye vat; 13. Spray dyeing mechanism; 14. Atomizer; 2. Fabric output device; 21. Hot drying assembly; 211. Hot drying cylinder; 212. Hot drying rack; 2121. Divider plate; 22. Fabric guiding assembly; 221. Fabric output roller; 222. Fabric guiding roller; 223. Fabric guiding drive component; 2231. Connecting roller; 2232. Fabric guiding worm; 2233. Fabric guiding worm wheel; 2234. Fabric guiding frame; 2235. Fabric guiding motor; 23. Storage box; 3. Post-processing and shaping equipment; 4. Drying device; 411. Drying box; 4111. Inlet; 4111. Guide roller; 412. Outlet; 4121. Outlet roller; 42. Drying roller; 43. Bending roller; 5. Padding device; 51. Padding tank; 52. Dipping... 6. Mill stand; 6. First dip assembly; 61. First dip assembly; 611. First dip drive; 612. First dip roller; 62. First scraper assembly; 621. Transverse scraper; 6211. Scraper roller; 6212. Scraper coil; 622. Longitudinal scraper; 6221. Scraper frame; 62211. Sliding groove; 6222. Scraper plate; 6223. Scraper drive; 62231. Rotating cam; 62232. Scraper drive motor; 7. Second dip assembly; 71. Second dip assembly; 711. Second dip drive; 712. Second dip roller; 72. Second dip assembly; 721. Dip roller; 8. Shaping device; 9. Fabric feeding assembly; 91. Feeding roller; 92. Feeding frame; 93. Fabric feeding roller; 94. Fabric feeding track; 95. Fabric feeding frame. Detailed Implementation

[0046] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0047] A waterproof production process for nylon warp-knitted fabrics is disclosed. The knitted fabric has a double-layer structure and is made of a blend of nylon and spandex, with a spandex content of 10-30%. The waterproof production process includes the following steps: knitting, degreasing and refining, pre-treatment and setting, dyeing, post-treatment and setting, and finished product inspection. The double-layer knitted fabric made of nylon material has good skin-friendliness. Through finishing and setting processes, it has good tear resistance and prevents scratches. During production, a fluorine-free water-repellent agent is used to finish the fabric, giving it a strong water-repellent effect. Tension is controlled during dyeing and finishing to reduce the impact of stretching. After post-treatment and setting, the finished knitted fabric has a soft hand feel, a smooth surface, and excellent waterproof performance. The overflow dyeing equipment 1 uses a low liquor ratio and low tension dyeing method, which allows the fabric to fully shrink and controls the resulting fabric to have high smoothness and a strong feel.

[0048] The specific steps are as follows:

[0049] Knitted Fabric Weaving: The knitted fabric is woven from blended yarn materials using warp knitting machines with a capacity of 36G or higher. The fabric is woven with two guide bars, using loop-extended yarn as the working layer. The weave structure of the first guide bar GB1 is 0-1 / 2-1 / 3-2 / 1-2 / / , and the weave structure of the second guide bar GB2 is 0-1 / 2-1 / 3-2- / 1-2 / / . Both guide bars GB1 and GB2 are fully threaded. The first guide bar GB1 uses 40-24F semi-dull, fully stretched nylon yarn with a nylon content of 77-81%, while the second guide bar GB2 uses Hyosung's 40D spandex yarn with a spandex content of 19-23%. This spandex utilizes a special polymerization technology, resulting in excellent plasticity and compressibility. The designated warping machine for the spandex is the Karl Mayer spandex warping machine. The spandex elongation ratio is 70%. The knitted fabric has a transverse density of 78-82 / inch and a longitudinal density of 130-140 / inch. The basic structural unit loop of the knitted fabric has a transverse diameter of 317µm and a longitudinal diameter of 192µm. The fabric has high transverse and longitudinal densities, small gaps between loops, and uses a 34A crimping mechanism. Compared to 34B and 34E, the crimping path is longer, resulting in more thorough elimination of fabric stress and avoiding problems such as uneven dyeing. An edge extender can be used during crimping to prevent edge curling. Figure 1 The diagram shows the structure of the first comb GB1 and the second comb GB2.

[0050] Degreasing and refining: The finished knitted fabric enters the refining machine for refining. The knitted fabric is heat-treated in the refining tank. 1.0-3.0 g / L of high-efficiency degreasing agent, 0.5-2 g / L of chelating dispersant, and 4-8 g / L of caustic soda are added to the refining tank, and the treatment temperature is controlled not to exceed 85℃. Then, it is thoroughly washed in a water washing tank at 40-60℃ at a speed of 20-30 m / min. The main tank temperature of the refining tank is 40℃, 75℃, and 85℃ in sequence, and the water washing tank temperature is 60℃, 50℃, and 40℃ in sequence.

[0051] Pretreatment and setting: After refining, the knitted fabric is heated and set at the pretreatment and setting point. The setting temperature is 180-200℃ and the speed is 20-30m / min.

[0052] Dyeing: The knitted fabric is dyed using overflow dyeing equipment 1. The liquor ratio is 1:8. Leveling agent and softener are added at room temperature and the process is run for 5-10 minutes. The temperature is raised from 30℃ to 70℃, which takes 30 minutes. The temperature is then maintained at 90℃-95℃ for 20-40 minutes. The temperature is then lowered to 60℃, which takes 20 minutes. The liquor is changed and drained three times. Fixing agent is added to dye tank 12, and the dyed knitted fabric is immersed in dyeing tank 11. The temperature is raised again from 30℃ to 80℃, which takes 20 minutes. The temperature is maintained for 15-30 minutes. The liquor is changed and drained twice. After adding soaping agent, the temperature is raised to 60℃ and maintained for 15-30 minutes. The fabric is then cooled, drained, and washed. It is then discharged through fabric discharge device 2.

[0053] Post-treatment and setting: Post-treatment and setting are performed using post-treatment and setting equipment 3. The post-treatment and setting steps include a resin padding process and a finishing and setting process. The resin padding process uses padding device 5, and the finishing and setting process uses setting device 8. After two passes and one pass in the resin padding process, the fabric enters the finishing and setting process. The resin padding process also includes a vacuum adsorption step. Afterward, the knitted fabric with excess padding is placed on setting device 8 for baking at a temperature of 140-160℃ for 60-80 seconds. The resin solution is prepared as follows: 20-50 g / L of polyurethane superhydrophilic finishing agent, 1-5 g / L of nonionic surfactant complex, 5-15 g / L of organic sulfur-based antibacterial agent, and finally, citric acid is added to adjust the pH of the resin solution to 4.5-6.0. At high temperature, the resin undergoes a cross-linking reaction with the fabric fibers, fully curing on the surface of the fabric fibers and improving the durability of the knitted fabric.

[0054] Finished product inspection: Finished knitted fabric is finished, rolled up, and samples are cut for inspection. Four samples are cut from different parts of the finished knitted fabric and numbered as Sample 1, Sample 2, Sample 3, and Sample 4. Samples 1-4 are of the same size. The front side of each sample is tested. Before testing, the samples are pretreated and placed in an atmosphere with an ambient temperature of 23±2℃ and a relative humidity of 50±5% for 7 days or until the samples achieve a constant weight.

[0055] Table 1: Evaluation of Drop Angle Test

[0056]

[0057] For the slip angle test evaluation proposed for waterproofing, a slip angle of less than 15 degrees is generally considered to have strong waterproofing. Therefore, the front of samples 1-4 has a strong waterproofing effect.

[0058] like Figure 2As shown, in order to assess the waterproof properties of knitted fabrics, an additional comparison was made to confirm whether the reverse side leaked water. A is a knitted fabric that has not undergone waterproof treatment, and the reverse side leaked water severely. B is a knitted fabric that has undergone post-treatment and shaping, and the reverse side showed no obvious water stains or watermarks and no liquid penetration. The reverse side showed no leakage. Therefore, the warp-knitted fabric of this application has superior waterproof performance.

[0059] like Figure 3 , Figure 4 and Figure 6 As shown, the overflow dyeing equipment 1 is equipped with a post-processing and setting device 3 at the discharge end. The overflow dyeing equipment 1 includes a dyeing cylinder 11, a dye cylinder 12, a spray dyeing mechanism 13, and an atomizer 14. The dye cylinder 12 and the atomizer 14 are both located on one side of the dyeing cylinder 11. The dye cylinder 12 is connected to the atomizer 14. The atomizer 14 is connected to the dyeing cylinder 11 through a liquid delivery pipe. The spray dyeing mechanism 13 is located on the dyeing cylinder 11. The dyeing cylinder 11 is also provided with multiple discharge ports 111 on the side near the post-processing and setting device 3. A fabric discharge device 2 is provided outside the discharge ports 111. The post-processing and shaping equipment 3 includes a drying device 4, a padding device 5, and a shaping device 8 arranged in sequence. The padding device 5 includes a padding tank 51, a padding frame 52, a first padding assembly 6, and a second padding assembly 7. The first padding assembly 6 and the second padding assembly 7 are both arranged along the width direction of the padding frame 52 and are installed on the padding frame 52 at both ends. The padding tank 51 is located inside the lower part of the padding frame 52. The shaping device 8 is a shaping machine and is located at the discharge end of the padding device 5. After the knitted fabric is woven, degreased, refined, and pretreated, it is sent to the overflow dyeing equipment 1 for dyeing. The dyed fabric is then sent to the post-treatment and setting equipment 3 for drying, padding, and setting in sequence. The dyed fabric is conveyed and relaxed through the fabric exit device 2, and the fabric is shaken to put it in a tension-free state. Then, the fabric is immersed and rolled by the first padding component 6 and the second padding component to ensure contact and penetration between the padding bath and the fabric, ensuring the subsequent roll-off rate, thereby ensuring the quality of the finished fabric. When the fabric is dyed and exited, the fabric exit device 2 shakes it to reduce the surface heat of the fabric and reduce the internal stress of the fabric, relieving the tension of the fabric in the dyeing tank 11, which facilitates the tension stretching operation during padding and drying, and avoids the fabric being in a state of continuous tension.

[0060] like Figure 3 and Figure 4As shown, the fabric output device 2 includes a heat drying assembly 21 and a fabric handling assembly 22. The heat drying assembly 21 includes a heat drying cylinder 211 and a heat drying rack 212. The heat drying cylinder 211 is rotatably mounted on the heat drying rack 212 at both ends. The heat drying rack 212 is arranged along the length of the dyeing cylinder 11 and has legs extending from both ends to be fixed to the outer wall of the dyeing cylinder 11. A partition plate 2121 is also provided in the length of the heat drying rack 212 corresponding to the middle position of the discharge port 111. The heat drying assembly 21 performs preliminary heat drying on the dyed fabric to reduce excessive moisture carried into the padding device 5 and reduce subsequent drying energy consumption.

[0061] The fabric feeding assembly 22 includes a feed roller 221, a feeding roller 222, and a feeding drive 223. The feed roller 221, feeding roller 222, and feeding drive 223 are all mounted on the heating rack 212. The feed roller 221 and feeding roller 222 are parallel to the axis of the heating cylinder 211, with the feed roller 221 positioned above and to the left of the feeding roller 222. The feeding drive 223 controls the rotation of the feeding roller 222. The feeding drive 223 includes a connecting roller 2231, two feeding worm gears 2232, two feeding worm wheels 2233, two feeding frames 2234, and two feeding motors 2235. The connecting roller 2231 is parallel to the axis of the feeding roller 222. Furthermore, the two ends of the connecting roller 2231 are rotatably mounted on the hot drying rack 212 and connected to the two ends of the fabric feeding roller 222 via the fabric feeding frame 2234. The fabric feeding worm gear 2233 is coaxially mounted with the connecting roller 2231 and is mounted on both ends of the connecting roller 2231. The axis of the fabric feeding worm 2232 is perpendicular to the axis of the fabric feeding worm gear 2233 and meshes with the fabric feeding worm gear 2233. The fabric feeding motor 2235 is mounted on the hot drying rack 212 and drives the fabric feeding worm gear 2232 to rotate. The fabric output device 2 also includes a storage box 23, which is located at the output end of the fabric feeding assembly 22 and is used to receive and store the fabric output by the fabric feeding assembly 22. The fabric feeding roller 222 is driven by the fabric feeding drive component 223 and controlled by the fabric feeding motor 2235—a reversible motor. The fabric feeding worm 2232 rotates, driving the fabric feeding worm wheel 2233 meshing with it to rotate. The reversible rotation of the fabric feeding worm 2232 causes the fabric feeding gear to rotate in both directions, causing the fabric feeding frame 2234, integrated with the fabric feeding worm wheel 2233, to swing up and down. This, in turn, causes the fabric feeding roller 222 on the fabric feeding frame 2234 to swing up and down. The fabric passing between the output roller 221 and the fabric feeding roller 222 is then conveyed and shaken before accumulating in the storage box 23, completing the fabric output operation. Fabrics from different output ports 111 accumulate in the corresponding storage boxes 23 below, and are then temporarily stored or directly transferred to subsequent equipment for processing according to demand.

[0062] like Figure 3 , Figure 4 and Figure 5As shown, a fabric guiding assembly 9 is also provided in front of the drying device 4. The fabric guiding assembly 9 is located near the storage box 23. The fabric guiding assembly 9 includes multiple feed rollers 91, feed frames 92 at both ends, multiple fabric guiding rollers 93, fabric guiding tracks 94 at both ends, and fabric guiding frames 95 at both ends. The feed rollers 91 are rotatably mounted on the feed frames 92 and are arranged vertically and alternately. The fabric piled in the storage box 23 is guided into the drying device 4 by the fabric guiding assembly 9. The fabric guiding assembly 9 first flattens and guides the stacked fabric through the feed rollers 91 and the feed frames 92.

[0063] The fabric guide track 94 is mounted on the fabric guide frame 95 and is a circulating conveyor structure, similar to a conveyor belt, causing the fabric guide rollers 93 on the fabric guide track 94 to reciprocate along the track circumference. The height of the side of the fabric guide track 94 closer to the drying device 4 is higher than the height of the side farther from the drying device 4. The fabric guide rollers 93 are all vacuum adsorption rollers, with their axes parallel to the axis of the feed rollers 91 and arranged in an array on the fabric guide track 94. The fabric guide rollers 93 slide along the outer circumference of the fabric guide track 94. The fabric is adsorbed by the fabric guide rollers 93 and slidably fed into the drying device 4. During the conveying process of the fabric guide rollers 93, the fabric is prevented from being stretched under tension, thereby reducing the possibility of abnormal stretching or even breakage of the fabric and providing convenience for lighter and thinner fabrics, while also reducing the possibility of lateral deviation during the conveying process.

[0064] like Figure 5 As shown, the drying chamber 41 uses an electric heating device to heat the fabric passing through it. An inlet 411 is located in the middle of the side of the drying chamber 41 near the fabric guide assembly 9. Guide rollers 4111 are installed on both the inner and outer sides of the inlet 411. The guide rollers 4111 are arranged along the width of the drying chamber 41 and are rotatably mounted on the drying chamber 41 at both ends. A bending roller 43 is also installed on the left side of the bottom of the drying chamber 41. The axis of the bending roller 43 is parallel to the axis of the guide rollers 4111, and its two ends are rotatably mounted inside the drying chamber 41. Drying rollers 42 are all installed inside the drying chamber 41, with adjacent drying rollers 42 staggered left and right. The fabric is wound in a serpentine pattern around the drying rollers 42. An outlet 412 is located on the right side of the top of the drying chamber 41. Outlet rollers 4121, parallel to the axis of the drying rollers 42, are installed on both the inner and outer sides of the outlet 412. The fabric flattened by the fabric feeding assembly 9 enters the drying chamber 41 through the inlet 411. The drying rollers 42 inside the drying chamber 41 are arranged alternately to increase the drying stroke of the fabric and reduce the amount of water carried by the fabric into the padding device 5, which dilutes the padding liquid and affects the subsequent padding effect.

[0065] like Figure 5 , Figure 6 and Figure 7As shown, the first impregnation assembly 6 includes a first impregnation component 61 and a first coating component 62. The first impregnation component 61 includes a first impregnation drive 611 and a plurality of first impregnation rollers 612. The first impregnation drive 611 controls the first impregnation rollers 612 to rotate synchronously. The first impregnation rollers 612 are arranged along the width direction of the impregnation tank 51 and are rotatably installed in the impregnation tank 51 with both ends positioned. The first coating component 62 includes a transverse coating component 621 and a longitudinal coating component 622. A vacuum adsorption device is also provided between the transverse coating component 621 and the longitudinal coating component 622.

[0066] The second impregnation assembly 7 includes a second impregnation component 71 and a second padding assembly 72. The second impregnation component 71 includes a second impregnation drive 711 and multiple second impregnation rollers 712. The second impregnation drive 711 controls the synchronous rotation of the second impregnation rollers 712. The second impregnation rollers 712 are arranged along the width direction of the impregnation tank 51 and are rotatably mounted in the impregnation tank 51 at both ends. The second padding assembly 72 includes multiple sets of vertically arranged parallel padding rollers 721, with the axis of the padding rollers 721 parallel to the axis of the second impregnation rollers 712. A drive component is separately provided outside the impregnation frame 52 corresponding to the first coating assembly 62 and the second padding assembly 72 to drive their movement. A spraying device can be installed in front of the second padding assembly 72 to spray the fabric surface before padding.

[0067] like Figure 5 , Figure 6 and Figure 7 As shown, the transverse coating component 621 includes a set of coating rollers 6211 arranged in an alternating manner. The coating rollers 6211 are positioned along the width of the padding tank 51 and rotatably mounted on the padding frame 52 at both ends. Spiral coating coils 6212 are fitted onto the coating rollers 6211. The coating coils 6212 are symmetrically arranged about the centerline of the coating roller 6211 along its length, with the two ends rotating in opposite directions. The coating rollers 6211 coat the upper and lower surfaces along the fabric travel direction, controlling the resin residue rate. The coating coils 6212 can be selected with appropriate densities based on the coating fineness and residue rate.

[0068] The longitudinal coating component 622 includes a coating frame 6221, two coating blades 6222, and two scraper drive components 6223. The coating frame 6221 is slidably arranged along the width direction of the dip-rolling mill stand 52. The two coating blades 6222 are fixed to the bottom of the coating frame 6221. The coating blades 6222 are arranged along the length direction of the coating frame 6221 and are slightly larger than half the length of the coating frame 6221. The coating frame 6221 has a waist-shaped sliding groove 62211 near both ends. The dip-rolling mill stand 52 has a sliding rod and a sliding support plate extending from the sliding groove 62211. The sliding rod and the sliding support plate are both installed in the sliding groove 62211.

[0069] The scraper drive unit 6223 is set at both ends of the scraper frame 6221. Each end of the scraper drive unit 6223 includes a rotating cam 62231 and a scraper drive motor 62232. The scraper drive motor 62232 controls the rotating cam 62231 to rotate. The axis of the rotating cam 62231 is set vertically and the two ends of the rotating cam 62231 are staggered.

[0070] When the large diameter of the rotating cam 62231 at the front end abuts against the outer wall of the corresponding coating rack 6221, the small diameter of the rotating cam 62231 at the other end abuts against the outer wall of the corresponding coating rack 6221. At the same time, the two sliding grooves 62211 are also engaged at two extreme positions. The coating rack 6221 drives the coating plate 6222 to move perpendicular to the fabric travel direction, thereby achieving longitudinal coating of the upper surface of the fabric. This ensures that the resin impregnation is thin enough and penetrates into the fabric in one pass, reducing surface protrusions and facilitating secondary impregnation operations.

[0071] The working principle and usage of the waterproof production process for nylon warp-knitted fabrics: After the knitted fabric is woven, degreased, refined, and pretreated, it is sent to the overflow dyeing equipment 1 for dyeing. Then, the dyed fabric is sent to the post-treatment and setting equipment 3 for drying, padding, and setting in sequence. The dyed fabric is conveyed and relaxed through the fabric output device 2, and the fabric is shaken to put it in a state without tension. Then, the fabric is immersed and rolled by the first padding component 6 and the second padding to ensure contact and penetration between the padding bath and the fabric, ensuring the subsequent roll-off rate, thereby ensuring the quality of the finished fabric.

[0072] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A waterproof manufacturing process for nylon warp-knitted fabrics, characterized in that, The knitted fabric has a double-layer structure and is made of a blend of nylon and spandex, with a spandex content of 10-30%. The waterproof production process of the knitted fabric includes the following steps: knitting, degreasing and refining, pretreatment and setting, dyeing, post-treatment and setting, and finished product inspection; the specific operations are as follows: Knitted Fabric Weaving: The knitted fabric is woven from blended yarn materials using a warp knitting machine with a warp strength of 36G or higher. The fabric is woven with two guide bars, and the working layer is a loop-extended yarn surface. The structure of the first guide bar GB1 is 0-1 / 2-1 / 3-2 / 1-2 / / , and the structure of the second guide bar GB2 is 0-1 / 2-1 / 3-2- / 1-2 / / . Both guide bars GB1 and GB2 are fully threaded. The first guide bar GB1 uses 40-24F semi-dull, fully stretched nylon yarn with a nylon content of 77-81%, while the second guide bar GB2 uses 40D high-elasticity, high-temperature resistant spandex yarn with a spandex content of 19-23%. Degreasing and refining: The finished knitted fabric enters the refining machine for refining. The knitted fabric is heat-treated in the refining tank. 1.0-3.0 g / L of high-efficiency degreasing agent, 0.5-2 g / L of chelating dispersant, and 4-8 g / L of caustic soda are added to the refining tank, and the temperature is controlled not to exceed 85℃. Then, it is thoroughly washed in a water washing tank at 40-60℃ at a speed of 20-30 m / min. The main tank temperature of the refining tank is 40℃, 75℃, and 85℃ in sequence, and the water washing tank temperature is 60℃, 50℃, and 40℃ in sequence. Pretreatment and setting: After refining, the knitted fabric is heated and set at the pretreatment and setting point. The setting temperature is 180-200℃ and the speed is 20-30m / min. Dyeing: The knitted fabric was dyed using an overflow dyeing device (1). The liquor ratio was 1:

8. Leveling agent and softener were added at room temperature and the process was run for 5-10 minutes. The temperature was increased from 30℃ to 70℃, and the heating time was 30 minutes. The temperature was then maintained at 90℃-95℃ for 20-40 minutes. The temperature was then reduced to 60℃, which took 20 minutes. The liquid was changed and drained three times. Fixing agent was added to the dyeing tank (12). The dyed knitted fabric was then immersed in the dyeing tank (11). The temperature was increased again from 30℃ to 80℃, which took 20 minutes. The temperature was maintained for 15-30 minutes. The liquid was changed and drained twice. After adding soap, the temperature was increased to 60℃ and maintained for 15-30 minutes. The fabric was then cooled, drained, and washed. Fabric is discharged through the fabric discharge device (2); the discharge end of the overflow dyeing equipment (1) is provided with a post-processing and shaping device (3). The overflow dyeing equipment (1) includes a dyeing cylinder (11), a dye cylinder (12), a spray dyeing mechanism (13), and an atomizer (14). The dye cylinder (12) and the atomizer (14) are both located on one side of the dyeing cylinder (11). The dye cylinder (12) is connected to the atomizer (14). The atomizer (14) is connected to the dyeing cylinder (11) through a liquid delivery pipe. The spray dyeing mechanism (13) is located on the dyeing cylinder (11). The dyeing cylinder (11) is also provided with multiple discharge ports (111) on the side near the post-processing and shaping device (3). The fabric discharge device (2) is provided outside the discharge port (111).The fabric feeding device (2) includes a heat drying assembly (21) and a fabric feeding assembly (22). The heat drying assembly (21) includes a heat drying cylinder (211) and a heat drying rack (212). The heat drying cylinder (211) is rotatably mounted on the heat drying rack (212) at both ends. The heat drying rack (212) is arranged along the length of the dyeing vat (11). A partition plate (2121) is also provided along the length of the heat drying rack (212) corresponding to the position of the discharge port (111). The fabric feeding assembly (22) includes a fabric feeding roller (…). 221), fabric feeding roller (222) and fabric feeding drive (223), wherein the fabric feeding roller (221), fabric feeding roller (222) and fabric feeding drive (223) are all mounted on the hot drying rack (212), the fabric feeding roller (221) and fabric feeding roller (222) are both parallel to the axis of the hot drying cylinder (211) and the fabric feeding roller (221) is mounted above one side of the fabric feeding roller (222), the fabric feeding drive (223) controls the rotation of the fabric feeding roller (222), the fabric feeding drive (223) includes a connecting roller (2 231) Two fabric guiding worm gears (2232), two fabric guiding worm wheels (2233), two fabric guiding frames (2234), and two fabric guiding motors (2235). The connecting roller (2231) is parallel to the axis of the fabric guiding roller (222) and arranged laterally. The two ends of the connecting roller (2231) are rotatably mounted on the heat drying rack (212) and connected to the two ends of the fabric guiding roller (222) through the fabric guiding frame (2234). The fabric guiding worm wheel (2233) is coaxial with the connecting roller (2231). The fabric feeding worm (2232) is installed at both ends of the connecting roller (2231). The axis of the fabric feeding worm (2232) is perpendicular to the axis of the fabric feeding worm wheel (2233) and meshes with the fabric feeding worm wheel (2233). The fabric feeding motor (2235) is installed on the hot drying rack (212) and drives the fabric feeding worm (2232) to rotate. The fabric output device (2) also includes a storage box (23). The storage box (23) is located at the output end of the fabric feeding assembly (22) and is used to receive and store the fabric output by the fabric feeding assembly (22). Post-treatment setting: Post-treatment setting equipment (3) is used for post-treatment setting and the post-treatment setting steps include resin impregnation process and finishing setting process. The resin impregnation process uses impregnation device (5) and the finishing setting process uses setting device (8). After two impregnations and one padding in the resin impregnation process, it enters the finishing setting process. The resin impregnation process also includes a vacuum adsorption step. Then, the knitted fabric after padding is placed on the setting device (8) for baking. The baking temperature is 140-160℃ and the baking time is 60-80 seconds. Finished product inspection: Finished knitted fabrics are sorted, rolled up, and samples are cut for inspection.

2. The production process for waterproof nylon warp-knitted fabrics according to claim 1, characterized in that, The transverse density of knitted fabric is 78-82 / inch, the longitudinal density is 130-140 / inch, and the transverse diameter of the basic structural unit loop of knitted fabric is 317um and the longitudinal diameter is 192um.

3. The production process for waterproof nylon warp-knitted fabrics according to claim 1, characterized in that, The resin solution in the post-treatment and setting step is prepared as follows: 20-50 g / L of polyurethane superhydrophilic finishing agent, 1-5 g / L of nonionic surfactant complex, 5-15 g / L of organic sulfur-based antibacterial agent, and finally, citric acid is added to adjust the pH of the resin solution to 4.5-6.

0.

4. The production process for waterproof nylon warp-knitted fabrics according to claim 1, characterized in that, The post-processing shaping equipment (3) includes a drying device (4), a padding device (5), and a shaping device (8) arranged in sequence. The drying device (4) includes a drying box (41) and a plurality of drying rollers (42) that are positioned and rotated in the drying box (41). The padding device (5) includes a padding tank (51), a padding frame (52), a first padding assembly (6), and a second padding assembly (7). The first padding assembly (6) and the second padding assembly (7) are both arranged along the width direction of the padding frame (52) and both ends are installed on the padding frame (52). The padding tank (51) is located inside the lower part of the padding frame (52). The shaping device (8) is a shaping machine and is located at the discharge end of the padding device (5).

5. The waterproof production process for nylon warp-knitted fabrics according to claim 4, characterized in that, A fabric guiding assembly (9) is also provided in front of the drying device (4). The fabric guiding assembly (9) is located near the storage box (23). The fabric guiding assembly (9) includes multiple feeding rollers (91), feeding frames (92) at both ends, multiple fabric guiding rollers (93), fabric guiding tracks (94) at both ends, and fabric guiding frames (95) at both ends. The feeding rollers (91) are rotatably mounted on the feeding frames (92) at both ends and are staggered vertically. The fabric guiding tracks (94) are set on the fabric guiding frames (95) and are a circulating conveying structure. The height of the side of the fabric guiding track (94) near the drying device (4) is higher than the height of the side of the fabric guiding track (94) away from the drying device (4). The fabric guiding rollers (93) are all vacuum adsorption rollers. The axis of the fabric guiding rollers (93) is parallel to the axis of the feeding rollers (91) and is arrayed on the fabric guiding track (94). The fabric guiding rollers (93) slide along the outer periphery of the fabric guiding track (94).

6. The waterproof production process for nylon warp-knitted fabrics according to claim 5, characterized in that, The drying chamber (41) has an inlet (411) in the middle of the side near the fabric feeding assembly (9). Guide rollers (4111) are provided on both the inner and outer sides of the inlet (411). The guide rollers (4111) are all arranged along the width direction of the drying chamber (41) and are rotatably mounted on the drying chamber (41) at both ends. A bending roller (43) is also provided on one side of the bottom of the drying chamber (41). The axis of the bending roller (43) is parallel to the axis of the guide roller (4111) and is rotatably mounted on the drying chamber (41) at both ends. The drying rollers (42) are all arranged in the drying chamber (41). Two adjacent drying rollers (42) are arranged alternately left and right. An outlet (412) is also provided on the top side of the drying chamber (41) near the padding device (5). An outlet roller (4121) parallel to the axis of the drying roller (42) is provided on both the inner and outer sides of the outlet (412).

7. The waterproof production process for nylon warp-knitted fabrics according to claim 4, characterized in that: The first dip-coating assembly (6) includes a first dip-coating assembly (61) and a first coating assembly (62). The first dip-coating assembly (61) includes a first dip-coating drive (611) and a plurality of first dip-coating rollers (612). The first dip-coating drive (611) controls the first dip-coating rollers (612) to rotate synchronously. The first dip-coating rollers (612) are arranged along the width direction of the dip-coating tank (51) and are rotatably installed in the dip-coating tank (51) with both ends positioned. The first coating assembly (62) includes a transverse coating component (621) and a longitudinal coating component (622). The transverse coating component (621) includes a set of staggered coating rollers (6211). The longitudinal coating component (622) includes a coating frame (6221), a coating plate (6222), and a scraper drive. A moving part (6223); a vacuum adsorption device is provided between the transverse coating part (621) and the longitudinal coating part (622); the second dip-coating assembly (7) includes a second dip-coating assembly (71) and a second dip-coating assembly (72). The second dip-coating assembly (71) includes a second dip-coating drive (711) and a plurality of second dip-coating rollers (712). The second dip-coating drive (711) controls the second dip-coating rollers (712) to rotate synchronously. The second dip-coating rollers (712) are arranged along the width direction of the dip-coating tank (51) and are rotatably installed in the dip-coating tank (51) at both ends. The second dip-coating assembly (72) includes a plurality of vertically arranged dip-coating rollers (721). The axis of the dip-coating rollers (721) is parallel to the axis of the second dip-coating rollers (712).

8. The waterproof production process for nylon warp-knitted fabrics according to claim 7, characterized in that: The coating roller (6211) is arranged along the width direction of the dip-rolling tank (51) and its two ends are rotatably mounted on the dip-rolling frame (52). A spiral coating coil (6212) is sleeved on the coating roller (6211). The coating coil (6212) is symmetrically arranged about the centerline of the coating roller (6211) along its length, and the two ends of the coating coil (6212) have opposite rotation directions. The coating frame (6221) is relatively slidably arranged along the width direction of the dip-rolling frame (52). The coating plate (6222) is fixed to the coating frame. At the bottom of the coating rack (6221), a sliding groove (62211) is provided near both ends. The scraper drive unit (6223) is provided at both ends of the coating rack (6221). Each scraper drive unit (6223) includes a rotating cam (62231) and a scraper drive motor (62232). The scraper drive motor (62232) controls the rotating cam (62231) to rotate. The axis of the rotating cam (62231) is vertically arranged and the rotating cams (62231) at both ends are staggered.

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