An elastic knitted fabric and its preparation method

Abstract

The present invention discloses an elastic knitted fabric and a preparation method thereof, including an elastic knitted fabric main body and a multifunctional processing device; through the padding process, the present invention realizes the rapid preparation of the antibacterial layer and the waterproof layer. At the same time, the setting of the antibacterial layer and the waterproof layer can enhance the antibacterial property and waterproof property of the elastic knitted fabric, enhance the safety of the elastic knitted fabric, and through methods such as base layer preparation, antibacterial layer padding preparation, waterproof layer padding preparation, bonding, and skin-friendly layer compounding, etc., the production and preparation of the elastic knitted fabric are carried out quickly. At the same time, during the padding preparation, by setting a multifunctional processing device inside the padding equipment, when antibacterial padding and waterproof padding are carried out, excess solvents can be extruded simultaneously, improving the subsequent drying and curing efficiency. The fabric transferred into the drying oven can achieve multi-stage intermittent tensioning, stretching the fabric in multiple stages, enhancing the curing and penetration of the internal solvents, improving the padding quality, and ensuring the subsequent fabric quality.

Description

Technical Field

[0001] The present invention relates to the technical field of elastic knitted fabric preparation, and particularly to an elastic knitted fabric and a preparation method thereof. Background Art

[0002] Knitted fabric is a fabric formed by bending yarns into loops and interlacing them with knitting needles. It is divided into warp-knitted fabric and weft-knitted fabric. Knitted fabrics have characteristics such as soft texture, moisture absorption, air permeability, sweat discharge, and warmth retention. Most of them have excellent elasticity and extensibility. Compared with woven fabrics, they have a high output and are suitable for small-batch production. Knitted clothing is comfortable to wear, fits the body closely, has no sense of tightness, and can fully reflect the body curve.

[0003] There is a composite elastic knitted fabric with the application number CN202023062058.9, which includes a knitted fabric body. The knitted fabric body is composed of a skin-friendly fabric, a first knitted layer, and a second knitted layer. Both the first knitted layer and the second knitted layer are provided with honeycomb-shaped ventilation holes. A first functional coating is provided on the surface of the first knitted layer, and a second functional coating is provided on the surface of the second knitted layer. The first functional coating is a silver ion antibacterial coating with a bactericidal effect. The first functional coating is attached to the first knitted layer, and the second functional coating is attached to the second knitted layer. The first knitted layer is woven from heat storage fibers, the second knitted layer is woven from composite elastic fibers, and the second knitted layer, the first knitted layer, and the skin-friendly fabric are sewn and connected in sequence from top to bottom. The surface of the second knitted layer is coated with long strip-shaped ultraviolet color-changing coatings at intervals.

[0004] In the above-mentioned existing knitted fabric, to improve its internal functionality, the first functional coating and the second functional coating are set. Currently, for the setting of the functional layer, the impregnation method is mostly used to modify the fiber material to make it have high efficiency functionality. However, the currently used impregnation equipment, when processing multiple layers of functional layers, uses fixed rollers or small adjustment methods, and it is relatively easy to have a slow extrusion efficiency of excess liquid. At the same time, the adaptability is low. And subsequently, when curing the coating, the material is transported smoothly, resulting in a low deep curing property of the liquid, and there is an uneven deep impregnation of the functional coating. Summary of the Invention

[0005] The purpose of the present invention is to provide an elastic knitted fabric and a preparation method thereof to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention adopts the following technical solution: An elastic knitted fabric includes an elastic knitted fabric main body. The elastic knitted fabric main body includes an elastic base layer, an antibacterial layer, a waterproof layer, and a skin-friendly layer. Antibacterial layers are bonded to both the upper and lower sides of the elastic base layer. A waterproof layer is bonded to the outside of the antibacterial layer, and a skin-friendly layer is bonded to the outside of the waterproof layer.

[0007] Preferably, the elastic base layer, the antibacterial layer, the waterproof layer and the skin-friendly layer are adhesively bonded to each other by hot melt adhesive, and the hot melt adhesive used is TPU hot melt adhesive.

[0008] The present invention provides a preparation method of an elastic knitted fabric, comprising the following steps:

[0009] S1. Preparation of the base layer: Elastic cotton and spandex fibers are blended into yarns in proportion and woven into shape by a double-sided circular weft knitting machine;

[0010] S2. Impregnation and rolling preparation of the antibacterial layer: The base fabric is placed in the solvent of the impregnation and rolling equipment, so that the antibacterial solvent penetrates into the interior of the base fabric and forms an antibacterial film layer after curing;

[0011] S3. Impregnation and rolling preparation of the waterproof layer: The base fabric is placed in the solvent of the impregnation and rolling equipment, so that the waterproof solvent penetrates into the interior of the base fabric and forms a waterproof film layer after curing;

[0012] S4. Adhesion: TPU hot melt adhesive is sprayed on the outside of the woven base layer, and after preheating, it is roll-bonded with the prepared antibacterial film layer. After preliminary bonding, TPU hot melt adhesive is sprayed on the outside of the antibacterial film layer, and after preheating, it is roll-bonded with the prepared waterproof film layer;

[0013] S5. Skin-friendly layer lamination: The skin-friendly layer is laminated to the outside of the prepared waterproof film layer by hot pressing and bonding, and after solidifying for a period of time, the preparation activity is completed.

[0014] Preferably, the impregnation and rolling equipment used in the steps S2 and S3 includes a first box body, a second box body, a controller, a first guide roller, a fixed roller, an output roller and a multi-functional processing device. The second box body is oppositely arranged on the right side of the first box body, the controller is installed on the front side of the first box body, first guide rollers are arranged at the upper left end of the first box body and the upper right end of the second box body, fixed rollers are rotatably installed at the lower ends inside the first box body and the second box body, output rollers are installed on the right side of the first box body and the left side of the second box body, and a multi-functional processing device is arranged between the first box body and the second box body.

[0015] Preferably, the multifunctional processing device includes a water storage tank, a first water storage tank, a second water storage tank, an adjustable extrusion assembly, a first support roller, a drying oven, a heating plate, a second support roller and a multi-stage tensioning assembly. The water storage tank is arranged between the first box body and the second box body. A first water storage tank is opened on the left side inside the water storage tank, and a second water storage tank is opened on the right side inside the water storage tank. An adjustable extrusion assembly is arranged on the front side of the water storage tank, and the adjustable extrusion assembly extends into the first water storage tank and the second water storage tank respectively. The first support roller is connected to one side of the drying oven. The drying oven is connected to the upper ends of the first box body or the second box body respectively. A heating plate is installed at the upper end inside the drying oven, and a second support roller is arranged on the other side of the drying oven. A multi-stage tensioning assembly is installed inside the drying oven.

[0016] Preferably, the adjustable extrusion assembly includes a bottom plate, a first motor, a worm, a worm gear, a screw rod and an extrusion structure. A first motor is arranged on the front side of the upper end of the bottom plate. The first motor is connected to the worm at the rear side. The lower end of the worm is meshed and connected with the worm gear. The middle part of the worm gear is butted with the screw rod. Both the left and right sides of the screw rod are threadedly butted with the extrusion structure, and the extrusion structure extends into the first water storage tank and the second water storage tank respectively.

[0017] Preferably, the extrusion structure includes a moving seat, a base, a first pressing roller, a first turntable, a first convex shaft, a transmission shaft, a second motor, a second convex shaft, a second turntable and a second pressing roller. The lower end of the moving seat is threadedly butted with one side of the screw rod, and the lower end of the moving seat is embedded inside the base. The rear side of the base is fixed to the outer end of the first box body or the second box body. One side of the upper end of the moving seat is rotatably connected with a first pressing roller, and the first pressing roller extends into the first water storage tank or the second water storage tank. The other side of the upper end of the moving seat is butted with a first turntable, and the middle part of the first turntable is butted with the middle part of the first pressing roller. The outer side of the first turntable is equidistantly inserted with first convex shafts, and one side of the first convex shafts is embedded outside one end of the transmission shaft. The transmission shaft is rotatably connected to the upper end of the base, and the upper end of the other side of the transmission shaft is embedded with a second convex shaft. The second convex shafts are equidistantly arranged at the outer end of the second turntable, and the second turntable is rotatably connected to the upper end of the base. The middle part of the second turntable is connected to the middle part of the second pressing roller, and the second pressing roller extends into the first water storage tank and the second water storage tank respectively. A second motor is butted on one side of the transmission shaft.

[0018] Preferably, the multi-stage tensioning assembly includes a fixing plate, a third motor, a transmission structure and a convex roller. The fixing plate is fixedly arranged at the rear side of the drying oven. A third motor is installed at the upper end of the middle part of the fixing plate. The front side of the third motor is butted with the transmission structure, and the front side of the transmission structure is connected to the convex roller. The convex roller is installed inside the drying oven.

[0019] Preferably, the transmission structure includes a main wheel, a first belt, a second belt, a first secondary wheel, a third belt, a second secondary wheel and a fourth belt, the main wheel is connected to the front side of the third motor, the outside of the main wheel is respectively connected to the first belt and the second belt, the first belt is connected to the outside of the first secondary wheel, the second belt is connected to the outside of the second secondary wheel, the outside of the first secondary wheel is connected to the third belt, the outside of the second secondary wheel is connected to the fourth belt, and the front ends of the first secondary wheel and the second secondary wheel are connected to convex rollers.

[0020] Preferably, the number of the first auxiliary wheels is consistent with that of the second auxiliary wheels, and adjacent first auxiliary wheels or adjacent second auxiliary wheels are respectively connected by a third belt or a fourth belt.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention realizes the rapid preparation of the antibacterial layer and the waterproof layer through the dipping process. At the same time, the provision of the antibacterial layer and the waterproof layer can enhance the antibacterial property and waterproof property of the elastic knitted fabric, and enhance the safety of the elastic knitted fabric. The elastic knitted fabric can be rapidly produced and prepared through the preparation of the base layer, the dipping preparation of the antibacterial layer, the dipping preparation of the waterproof layer, bonding, and the compounding of the skin-friendly layer. At the same time, during the dipping preparation, by providing a multifunctional processing device inside the dipping equipment, the antibacterial dipping and the waterproof dipping can be efficiently carried out simultaneously, and the excess solvent can be squeezed out at the same time, thereby improving the subsequent drying and curing efficiency. The fabric moved into the drying box can realize multi-stage intermittent tensioning, so that the fabric is stretched in multiple stages, the curing penetration of the internal solvent is enhanced, the dipping quality is improved, and the subsequent fabric quality is guaranteed.

[0023] The first water tank, the second water tank and the adjustable extrusion assembly are set up, that is, the base fabric that has completed the antibacterial impregnation and the waterproof impregnation can be moved into the first water tank and the second water tank respectively, and the first water tank and the second water tank can realize the collection and recovery of excess solvent. At the same time, through the cooperation of the first pressing roller and the second pressing roller, the excess solvent can be quickly squeezed out to ensure the subsequent drying and curing efficiency.

[0024] The setting of the screw and the extrusion structure, that is, when the screw is driven to make the movable seats connected on both sides move simultaneously, the first pressure roller and the first turntable connected at the upper end will move simultaneously, and the first turntable will move correspondingly along the spiral end on one side of the rotating shaft through the first convex shaft mentioned on the front side, so that the distance between the two groups of first pressure rollers and the second pressure rollers can be flexibly adjusted to meet the requirements of the antibacterial base fabric and the waterproof base fabric while adjusting the extrusion.

[0025] The settings of the drying oven, heating plate and multi-stage tensioning assembly, that is, when the base fabric is moved into the interior of the drying oven, the heating plate provided at the upper end inside the drying oven can be operated to achieve the rapid drying, curing and forming of the impregnated base fabric. In order to enhance the solvent curing and penetration, the base fabric can be docked with the various convex rollers inside the drying oven to achieve the multi-stage bending state of the base fabric. At this time, with the rotation drive of the main runner and the same-direction drive of the first belt and the second belt docked on both outer ends, the first sub-runner and the second sub-runner can rotate in the same direction. And the first sub-runner and the second sub-runner can also realize the same-direction rotation of the first sub-runner and the second sub-runner at various positions through the driving effect of the third belt and the fourth belt installed correspondingly at the outer ends. In this way, the convex rollers docked at the front ends of the first sub-runner and the second sub-runner at various positions and provided inside the drying oven will intermittently tension the base fabric to intermittently stretch the base fabric fibers, deepen the solvent curing and penetration, and ensure the quality of antibacterial impregnation and waterproof impregnation, that is, ensure the preparation quality of the antibacterial layer and the waterproof layer. Description of the Drawings

[0026] Figure 1 Schematic diagram of the main structure of the elastic knitted fabric of the present invention;

[0027] Figure 2 Schematic diagram of the structure of the impregnation equipment of the present invention;

[0028] Figure 3 Schematic diagram of the front internal structure of the multifunctional processing device of the present invention;

[0029] Figure 4 Schematic diagram of the three-dimensional structure of the adjustable extrusion assembly of the present invention;

[0030] Figure 5 Schematic diagram of the three-dimensional structure of the extrusion structure of the present invention;

[0031] Figure 6 Schematic diagram of the three-dimensional structure of the multi-stage tensioning assembly of the present invention;

[0032] Figure 7 Schematic diagram of the three-dimensional structure of the transmission structure of the present invention.

[0033] In the figure: elastic knitted fabric main body - 1, elastic base layer - 11, antibacterial layer - 12, waterproof layer - 13, skin-friendly layer - 14, first box body - 2, second box body - 3, controller - 4, first guide roller - 5, fixed roller - 6, output roller - 7, multi-functional processing device - 8, water storage tank - 81, first water storage tank - 82, second water storage tank - 83, adjustable extrusion assembly - 84, bottom plate - 841, first motor - 842, worm - 843, worm gear - 844, screw - 845, extrusion structure - 846, moving seat - 8461, base - 8462, first pressing roller - 8463, first turntable - 8464, first convex shaft - 8465, transmission shaft - 8466, second motor - 8467, second convex shaft - 8468, second turntable - 8469, second pressing roller - 84610, first supporting roller - 85, drying oven - 86, heating plate - 87, second supporting roller - 88, multi-stage tensioning assembly - 89, fixing plate - 891, third motor - 892, transmission structure - 893, main runner - 8931, first belt - 8932, second belt - 8933, first auxiliary runner - 8934, third belt - 8935, second auxiliary runner - 8936, fourth belt - 8937, convex roller - 894. Detailed implementation manners

[0034] In order to further explain the technical solution of the present invention, the following will be elaborated in detail through specific embodiments.

[0035] Please refer to Figure 1 , the present invention provides an elastic knitted fabric, including an elastic knitted fabric main body 1. The elastic knitted fabric main body 1 includes an elastic base layer 11, an antibacterial layer 12, a waterproof layer 13 and a skin-friendly layer 14. Antibacterial layers 12 are bonded to both the upper and lower sides of the elastic base layer 11. A waterproof layer 13 is bonded to the outside of the antibacterial layer 12. A skin-friendly layer 14 is bonded to the outside of the waterproof layer 13.

[0036] Among them, the elastic base layer 11, the antibacterial layer 12, the waterproof layer 13 and the skin-friendly layer 14 are bonded to each other through hot melt adhesive, and the hot melt adhesive used is TPU hot melt adhesive.

[0037] The present invention provides a preparation method of an elastic knitted fabric, including the following steps:

[0038] S1. Base layer preparation: Blend elastic cotton (85% - 92%) and spandex fiber (8% - 15%) into yarns, and weave them into shape through a double-sided circular weft knitting machine. Among them, spandex provides bi-directional elasticity, and elastic cotton gives softness and breathability;

[0039] S2. Antibacterial layer padding preparation: Put the base fabric into the solvent of the padding equipment, so that the antibacterial solvent penetrates into the interior of the base fabric and forms an antibacterial film layer through curing. Among them, the antibacterial solvent can be composed of one or more of nano-silver dispersion liquid, quaternary ammonium salt compounds or natural plant extracts;

[0040] S3. Preparation of waterproof layer by padding: Place the base fabric into the solvent of the padding equipment, so that the waterproof solvent penetrates into the interior of the base fabric and forms a waterproof film layer through curing. Among them, the waterproof solvent is composed of a bio-based polyurethane resin solution. The bio-based polyurethane resin is dissolved in a bio-based solvent and forms a homogeneous solution after being mixed with an auxiliary agent. A film or coating is formed through steps such as doctor blading, dipping, and phase separation, thereby forming a waterproof film covering state.

[0041] S4. Bonding: Spray TPU hot melt adhesive on the outside of the woven base layer, and after preheating, roll and bond it with the prepared antibacterial film layer. After preliminary bonding, spray TPU hot melt adhesive on the outside of the antibacterial film layer, and after preheating, roll and bond it with the prepared waterproof film layer.

[0042] S5. Composite of skin-friendly layer: Bond the skin-friendly layer to the outside of the prepared waterproof film layer by hot pressing (temperature 110 - 130 °C, time 10 - 15 seconds). After solidifying for a period of time, the preparation activity is completed. Among them, the skin-friendly layer can be made of mercerized cotton, modal, or tencel.

[0043] Please refer to Figure 2 , the padding equipment in this embodiment includes a first box body 2, a second box body 3, a controller 4, a first guide roller 5, a fixed roller 6, an output roller 7, and a multi-functional processing device 8. The second box body 3 is oppositely arranged on the right side of the first box body 2. The controller 4 is installed on the front side of the first box body 2. The first guide rollers 5 for feeding and transmission are arranged at the upper left end of the first box body 2 and the upper right end of the second box body 3. The fixed rollers 6 are rotatably installed at the lower ends inside the first box body 2 and the second box body 3. Through the arrangement of the fixed rollers 6, the fabric can be transmitted to the lower ends inside the first box body 2 and the second box body 3 to ensure sufficient impregnation in the subsequent process. The output rollers 7 for discharging and transmission are installed on the right side of the first box body 2 and the left side of the second box body 3. A multi-functional processing device 8 is arranged between the first box body 2 and the second box body 3.

[0044] Please refer to Figure 3, the multi-functional processing device 8 in this embodiment includes a water storage tank 81, a first water storage tank 82, a second water storage tank 83, an adjustable extrusion assembly 84, a first support roller 85, a drying box 86, a heating plate 87, a second support roller 88 and a multi-stage tensioning assembly 89. The water storage tank 81 is arranged between the first box body 2 and the second box body 3. A first water storage tank 82 is opened on the left side inside the water storage tank 81, and a second water storage tank 83 is opened on the right side inside the water storage tank 81. Moreover, drain pipe openings are butt-connected to the lower ends of both the first water storage tank 82 and the second water storage tank 83. An adjustable extrusion assembly 84 is provided on the front side of the water storage tank 81, and the adjustable extrusion assembly 84 extends into the first water storage tank 82 and the second water storage tank 83 respectively, so as to meet the adjustable extrusion movement of the fabric. The first support roller 85 is connected to one side of the inlet end of the drying box 86, so as to ensure the stable transmission of the fabric into the drying box 86. The drying box 86 is connected to the upper ends of the first box body 2 or the second box body 3 respectively. A heating plate 87 is installed at the upper end inside the drying box 86, and a second support roller 88 is arranged on one side of the outlet end of the drying box 86. A multi-stage tensioning assembly 89 is installed inside the drying box 86.

[0045] Please refer to Figures 4 - 5 , the adjustable extrusion assembly 84 in this embodiment includes a bottom plate 841, a first motor 842, a worm 843, a worm gear 844, a screw rod 845 and an extrusion structure 846. A first motor 842 is provided on the front side of the upper end of the bottom plate 841. The first motor 842 is connected to the worm 843 at the rear side. The lower end of the worm 843 is meshed and connected with the worm gear 844. A screw rod 845 is horizontally butted in the middle of the worm gear 844. Moreover, the external threads opened on the left and right sides of the screw rod 845 are in opposite states. Both the left and right sides of the screw rod 845 are threadedly butted with the extrusion structure 846, and the extrusion structure 846 extends into the first water storage tank 82 and the second water storage tank 83 respectively.

[0046] Among them, the extrusion structure 846 includes a moving seat 8461, a base 8462, a first pressing roller 8463, a first turntable 8464, a first convex shaft 8465, a transmission shaft 8466, a second motor 8467, a second convex shaft 8468, a second turntable 8469 and a second pressing roller 84610. The inner part of the lower end of the moving seat 8461 is threadedly docked with the external thread on one side of the screw 845, and the lower end of the moving seat 8461 is embedded in the inner part of the base 8462. In this way, with the rotation of the screw 845, the moving seat 8461 can move along the transverse end of the upper end of the base 8462 to flexibly adjust the subsequent extrusion distance. The rear side of the base 8462 is fixed to the outer end of the first box body 2 or the second box body 3, so as to ensure the firmness of the structural state. The rear side of the upper end of the moving seat 8461 is rotatably connected with the first pressing roller 8463, and the first pressing roller 8463 extends into the first water storage tank 82 or the second water storage tank 83. The front side of the upper end of the moving seat 8461 is butted with the first turntable 8464, and the middle part of the first turntable 8464 is butted with the middle part of the first pressing roller 8463. In this way, the first turntable 8464 and the first pressing roller 8463 can rotate in the same direction. A plurality of first convex shafts 8465 are inserted at equal intervals along the annular track on the outer side of the first turntable 8464, and one side of the first convex shaft 8465 is embedded in the upper end of the right side of the transmission shaft 8466. The transmission shaft 8466 is rotatably connected to the upper end of the base 8462. Moreover, the left and right sides of the transmission shaft 8466 are arranged in opposite helical shapes, and the left helical end of the transmission shaft 8466 is embedded with the second convex shaft 8468. The second convex shaft 8468 is arranged at equal intervals along the annular track on the outer end of the second turntable 8469, and the number of structures of the second convex shaft 8468 and the second turntable 8469 is the same as that of the first convex shaft 8465 and the first turntable 8464. The second turntable 8469 is rotatably connected to the upper end of the side of the base 8462 away from the moving seat 8461. The middle part of the second turntable 8469 is connected to the middle part of the second pressing roller 84610, and the second pressing roller 84610 extends into the first water storage tank 82 and the second water storage tank 83 respectively. One side of the transmission shaft 8466 is butted with the second motor 8467.

[0047] Please refer to Figures 6 - 7 , the multi-stage tensioning assembly 89 in this embodiment includes a fixing plate 891, a third motor 892, a transmission structure 893 and a convex roller 894. The fixing plate 891 is fixedly connected to the rear side of the drying oven 86. The upper end of the middle part of the fixing plate 891 is provided with the third motor 892. The front side of the third motor 892 is butted with the transmission structure 893, and the front side of the transmission structure 893 is connected to the convex roller 894. The convex rollers 894 are equidistantly installed inside the drying oven 86. Six convex rollers 894 are equidistantly arranged inside the drying oven 86, and the arranged directions of the convex rollers 894 are alternately up and down.

[0048] Among them, the transmission structure 893 includes a main runner 8931, a first belt 8932, a second belt 8933, a first auxiliary runner 8934, a third belt 8935, a second auxiliary runner 8936 and a fourth belt 8937. The main runner 8931 is connected to the front side of the third motor 892. The first belt 8932 and the second belt 8933 are respectively butted outside the main runner 8931, and the first belt 8932 and the second belt 8933 are installed in opposite inclined directions. One end of the first belt 8932 away from the main runner 8931 is connected to the outside of the first auxiliary runner 8934, and one end of the second belt 8933 away from the main runner 8931 is connected to the outside of the second auxiliary runner 8936. The third belt 8935 is butted outside the first auxiliary runner 8934, and the fourth belt 8937 is butted outside the second auxiliary runner 8936. The front ends of the first auxiliary runner 8934 and the second auxiliary runner 8936 are both connected to the convex roller 894.

[0049] Among them, the number of the first auxiliary runners 8934 and the second auxiliary runners 8936 is the same, both are three, and the adjacent first auxiliary runners 8934 or the adjacent second auxiliary runners 8936 are respectively driven and connected by the third belt 8935 or the fourth belt 8937. In this way, the linkage docking of the three first auxiliary runners 8934 or the second auxiliary runners 8936 can be realized, and due to the relative docking effect of the first belt 8932 and the second belt 8933, the three first auxiliary runners 8934 and the second auxiliary runners 8936 on both sides can rotate in the same direction.

[0050] Working principle:

[0051] First, when carrying out the padding processing activities of the antibacterial layer 12 and the waterproof layer 13, the base cloth can be respectively butted with the first guide roller 5, the fixed roller 6 and the output roller 7 installed inside the first box body 2 and the second box body 3. At the same time, the base cloths on both sides are respectively moved into the first water storage tank 82 and the second water storage tank 83 and are in contact with the first pressing roller 8463 and the second pressing roller 84610 extending into the first water storage tank 82 and the second water storage tank 83. Finally, in cooperation with the first supporting roller 85, it can enter the drying box 86 and discharge along the second supporting roller 88. In this way, the placement activities of the base cloth to be padded by the antibacterial layer 12 and the waterproof layer 13 are completed;

[0052] After the base fabric enters the interiors of the first box body 2 and the second box body 3 respectively, the antibacterial solvent and the waterproof solvent inside the first box body 2 and the second box body 3 will invade the corresponding base fabric interior to achieve antibacterial impregnation and waterproof impregnation activities. After the impregnation activity is completed, the base fabric with the solvent will be moved between the first pressing roller 8463 and the second pressing roller 84610. With the rolling and pressing effect of the first pressing roller 8463 and the second pressing roller 84610, the extrusion of the excess solvent inside the base fabric will be realized, avoiding excessive solvent carrying and affecting the subsequent drying and curing efficiency. The extruded excess solvent will be respectively collected into the interiors of the first water storage tank 82 and the second water storage tank 83, and will be discharged and recycled along the drain pipes correspondingly arranged at the lower ends of the first water storage tank 82 and the second water storage tank 83. To improve the extrusion flexibility, the first motor 842 provided at the upper end of the driving base plate 841 can be driven to make the output end of the first motor 842 rotate the worm 843 connected thereto. As the worm 843 rotates, the worm gear 844 engaged with the lower end of the worm 843 will rotate accordingly, and the worm gear 844 will correspondingly drive the rotation of the middle horizontal docking screw 845. Thus, as the screw 845 rotates, the moving seat 8461 threadedly connected to the left and right sides of the screw 845 and embedded inside one side of the base 8462 will realize the leftward or rightward movement. When the moving seat 8461 moves, the pressing distance between the first pressing roller 8463 and the second pressing roller 84610 can be flexibly adjusted by the part that is docked to the rear side of the upper end of the moving seat 8461 and extends into the first water storage tank 82 or the second water storage tank 83. At the same time, when the moving seat 8461 drives the first pressing roller 8463 to move, the first turntable 8464 docked to the front side of the first pressing roller 8463 will cooperate with the first convex shafts 8465 equidistantly arranged outside to rotate and move along the spiral end on one side of the transmission shaft 8466 to ensure its position is consistent with that of the first pressing roller 8463 front and back. After the adjustment is completed, by driving the second motor 8467 connected to one end of the transmission shaft 8466, the whole transmission shaft 8466 can be rotated. Thus, the first convex shaft 8465 and the second convex shaft 8468 respectively docked to the opposite spiral ends on both sides of the transmission shaft 8466 will respectively realize the synchronous reverse rotation of the first turntable 8464 and the second turntable 8469 to quickly realize the extrusion and transmission activity of the impregnated base fabric. At the same time, because the extrusion structure 846 extends into the first water storage tank 82 and the second water storage tank 83 respectively, the extrusion activity of the excess solvent in the antibacterial impregnation and waterproof impregnation activities is carried out simultaneously, shortening the working sequence and accelerating the subsequent preparation efficiency;

[0053] When the base fabrics on both sides have respectively completed the extrusion activities and enter the drying boxes 86 arranged symmetrically on both sides, the large-range heating and drying activities of the entered base fabrics will be realized through the heating plates 87 arranged at the upper ends in the drying boxes 86, so that the antibacterial solvent and the waterproof solvent are quickly cured to form the antibacterial layer 12 and the waterproof layer 13. When the base fabric enters the inside of the drying box 86, it will sequentially pass through the outside of six convex rollers 894 in an alternating manner, so that the base fabric is in a multi-segment bent state. In this way, the stretching of the base fabric fibers can be assisted, so that the solvent can be cured and penetrate into the fibers. In this way, the quality of the impregnation preparation of the antibacterial layer 12 and the waterproof layer 13 can be ensured. At the same time, when carrying out the drying and curing activities, the third motor 892 arranged in the middle of the upper end of the fixing plate 891 can be operated, so that the third motor 892 realizes the rotation of the main runner 8931 connected to the front side. When the main runner 8931 rotates, the first belt 8932 and the second belt 8933 connected to both ends of the outer end of the main runner 8931 will rotate in the same direction. Therefore, the first sub-runner 8934 and the second sub-runner 8936 respectively connected to the upper ends of the first belt 8932 and the second belt 8933 will rotate synchronously. When the first sub-runner 8934 and the second sub-runner 8936 rotate, through the externally correspondingly installed second belt 8933 and the fourth belt 8937, the same-direction rotation of the externally correspondingly connected runners can be realized. Therefore, the six convex rollers 894 respectively connected to the front sides of the first sub-runner 8934 and the second sub-runner 8936 and arranged inside the drying box 86 can rotate in the same direction to realize the multi-segment tensioning of the base fabric, greatly improving the curing and forming quality of the solvent and the base fabric.

[0054] The above are only the preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A method for preparing an elastic knitted fabric, characterized in that: It includes the following steps: S1. Substrate preparation: Elastic cotton and spandex fiber are blended into yarns in proportion and woven into shape by a double-sided circular weft knitting machine; S2. Preparation of antibacterial layer by padding: The base fabric is placed in the solvent of the padding equipment, so that the antibacterial solvent penetrates into the interior of the base fabric and is cured to form an antibacterial film layer; S3. Preparation of waterproof layer by padding: The base fabric is placed in the solvent of the padding equipment, so that the waterproof solvent penetrates into the interior of the base fabric and is cured to form a waterproof film layer; S4. Bonding: Spray TPU hot melt adhesive on the outside of the woven substrate, preheat it and roll-bond it with the prepared antibacterial film layer. After preliminary bonding, spray TPU hot melt adhesive on the outside of the antibacterial film layer, preheat it and roll-bond it with the prepared waterproof film layer; S5. Composite of skin-friendly layer: The skin-friendly layer is bonded to the outside of the prepared waterproof film layer by hot pressing and bonding, and after solidifying for a period of time, the preparation activity is completed; The padding equipment used in steps S2 and S3 includes a first box body (2), a second box body (3), a controller (4), a first guide roller (5), a fixed roller (6), an output roller (7) and a multi-functional processing device (8). The second box body (3) is oppositely arranged on the right side of the first box body (2). The controller (4) is installed on the front side of the first box body (2). The first guide rollers (5) are arranged at the upper left end of the first box body (2) and the upper right end of the second box body (3). Fixed rollers (6) are rotatably installed at the lower ends inside the first box body (2) and the second box body (3). Output rollers (7) are installed on the right side of the first box body (2) and the left side of the second box body (3). A multi-functional processing device (8) is arranged between the first box body (2) and the second box body (3); The multi-functional processing device (8) includes a water storage tank (81), a first water storage tank (82), a second water storage tank (83), an adjustable extrusion assembly (84), a first support roller (85), a drying oven (86), a heating plate (87), a second support roller (88) and a multi-segment tensioning assembly (89). The water storage tank (81) is arranged between the first box body (2) and the second box body (3). A first water storage tank (82) is opened on the left side inside the water storage tank (81), and a second water storage tank (83) is opened on the right side inside the water storage tank (81). The adjustable extrusion assembly (84) is arranged on the front side of the water storage tank (81), and the adjustable extrusion assembly (84) extends into the first water storage tank (82) and the second water storage tank (83) respectively. The first support roller (85) is connected to one side of the drying oven (86). The drying oven (86) is respectively connected to the upper ends of the first box body (2) or the second box body (3). The heating plate (87) is installed at the upper end inside the drying oven (86), and a second support roller (88) is arranged on the other side of the drying oven (86). A multi-segment tensioning assembly (89) is installed inside the drying oven (86); The adjustable extrusion assembly (84) includes a bottom plate (841), a first motor (842), a worm (843), a worm gear (844), a screw rod (845) and an extrusion structure (846). A first motor (842) is provided on the front side of the upper end of the bottom plate (841). The rear side of the first motor (842) is connected to the worm (843). The lower end of the worm (843) is meshed with the worm gear (844). The middle of the worm gear (844) is butted with the screw rod (845). The left and right sides of the screw rod (845) are in threaded connection with the extrusion structure (846), and the extrusion structure (846) extends into the first water storage tank (82) and the second water storage tank (83) respectively.

2. The preparation method of an elastic knitted fabric according to claim 1, wherein: The extrusion structure (846) includes a moving seat (8461), a base (8462), a first pressing roller (8463), a first turntable (8464), a first convex shaft (8465), a transmission shaft (8466), a second motor (8467), a second convex shaft (8468), a second turntable (8469) and a second pressing roller (84610). The lower end of the moving seat (8461) is in threaded connection with one side of the screw rod (845), and the lower end of the moving seat (8461) is embedded inside the base (8462). The rear side of the base (8462) is fixed to the outer end of the first box body (2) or the second box body (3). One side of the upper end of the moving seat (8461) is rotatably connected to the first pressing roller (8463), and the first pressing roller (8463) extends into the first water storage tank (82) or the second water storage tank (83). The other side of the upper end of the moving seat (8461) is butted with the first turntable (8464), and the middle of the first turntable (8464) is butted with the middle of the first pressing roller (8463). The first convex shafts (8465) are equidistantly inserted on the outer side of the first turntable (8464), and one side of the first convex shaft (8465) is embedded outside one end of the transmission shaft (8466). The transmission shaft (8466) is rotatably connected to the upper end of the base (8462), and the upper end of the other side of the transmission shaft (8466) is embedded with the second convex shaft (8468). The second convex shafts (8468) are equidistantly arranged on the outer end of the second turntable (8469), and the second turntable (8469) is rotatably connected to the upper end of the base (8462). The middle of the second turntable (8469) is connected to the middle of the second pressing roller (84610), and the second pressing roller (84610) extends into the first water storage tank (82) and the second water storage tank (83) respectively. A second motor (8467) is butted on one side of the transmission shaft (8466).

3. The preparation method of an elastic knitted fabric according to claim 1, wherein: The multi-stage tensioning assembly (89) comprises a fixed plate (891), a third motor (892), a transmission structure (893) and a convex roller (894); the fixed plate (891) is fixedly arranged on the rear side of the drying box (86); the third motor (892) is installed on the upper middle end of the fixed plate (891); the front side of the third motor (892) is connected to the transmission structure (893), and the front side of the transmission structure (893) is connected to the convex roller (894); and the convex roller (894) is installed inside the drying box (86).

4. The preparation method of an elastic knitted fabric according to claim 3, wherein: The transmission structure (893) comprises a main rotating wheel (8931), a first belt (8932), a second belt (8933), a first secondary rotating wheel (8934), a third belt (8935), a second secondary rotating wheel (8936) and a fourth belt (8937); the main rotating wheel (8931) is connected to the front side of the third motor (892); the first belt (8932) and the second belt (8933) are respectively connected to the outside of the main rotating wheel (8931); The first belt (8932) is connected to the outer side of the first secondary rotating wheel (8934), the second belt (8933) is connected to the outer side of the second secondary rotating wheel (8936), the outer side of the first secondary rotating wheel (8934) is butt-jointed with a third belt (8935), the outer side of the second secondary rotating wheel (8936) is butt-jointed with a fourth belt (8937), and the front ends of the first secondary rotating wheel (8934) and the second secondary rotating wheel (8936) are both connected to the convex roller (894).

5. The preparation method of an elastic knitted fabric according to claim 4, characterized in that: The number of the first auxiliary rotating wheels (8934) and the number of the second auxiliary rotating wheels (8936) are consistent, and adjacent first auxiliary rotating wheels (8934) or adjacent second auxiliary rotating wheels (8936) are respectively connected by a third belt (8935) or a fourth belt (8937).

6. An elastic knitted fabric, prepared by the preparation method of an elastic knitted fabric according to any one of claims 1-5, characterized in that: The elastic knitted fabric body (1) comprises an elastic base layer (11), an antibacterial layer (12), a waterproof layer (13) and a skin-friendly layer (14); the antibacterial layer (12) is bonded to the upper and lower sides of the elastic base layer (11); the waterproof layer (13) is bonded to the outer side of the antibacterial layer (12); and the skin-friendly layer (14) is bonded to the outer side of the waterproof layer (13); The elastic base layer (11), the antibacterial layer (12), the waterproof layer (13) and the skin-friendly layer (14) are all bonded to each other by hot melt adhesive, and the hot melt adhesive used is TPU hot melt adhesive.

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