Elastic knitted fabric and preparation method thereof

Abstract

The invention discloses an elastic knitted fabric and a preparation method thereof. The elastic knitted fabric comprises an elastic knitted fabric main body and a multifunctional processing device, the antibacterial layer and the waterproof layer are rapidly prepared through a padding process, meanwhile, the antibacterial property and the waterproof property of the elastic knitted fabric can be enhanced through the arrangement of the antibacterial layer and the waterproof layer, the implementation safety of the elastic knitted fabric is enhanced, and the antibacterial property and the waterproof property of the elastic knitted fabric are improved through the modes of base layer preparation, antibacterial layer padding preparation, waterproof layer padding preparation, bonding, skin-friendly layer compounding and the like. Meanwhile, during padding preparation, a multifunctional processing device is arranged in padding equipment, when antibacterial padding and waterproof padding are carried out, redundant solvent can be extruded out at the same time, the subsequent drying and curing efficiency is improved, fabric moved into a drying box can be tensioned in a multi-section intermittent mode, and therefore the elastic knitted fabric can be rapidly produced and prepared. The fabric is stretched in multiple sections, the curing permeability of a solvent in the fabric is enhanced, the padding quality is improved, and the subsequent fabric quality is guaranteed.

Description

Technical Field

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

[0002] Knitted fabric is a fabric made by bending yarn into loops and interlacing them with knitting needles. It is divided into warp knitted fabric and weft knitted fabric. Knitted fabrics are soft, moisture-absorbent, breathable, perspiration-wicking and warm-keeping. Most of them have excellent elasticity and extensibility. Compared with woven fabrics, they have high output and are suitable for small batch production. Knitted clothing is comfortable to wear, fits the body well, has no tightness, and can fully reflect the curves of the human body.

[0003] The existing application number is CN202023062058.9, which is a composite elastic knitted fabric, including a knitted fabric body, which is composed of a skin-friendly fabric, a first knitted layer and a second knitted layer. The first knitted layer and the second knitted layer are both provided with honeycomb-shaped breathable mesh holes. The surface of the first knitted layer is provided with a first functional coating, and the surface of the second knitted layer is provided with a second functional coating. 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, and the second knitted layer is woven from composite elastic fibers. The second knitted layer, the first knitted layer and the skin-friendly fabric are sewn and connected in sequence from top to bottom, and the surface of the second knitted layer is coated with long strips of ultraviolet color-changing coating at intervals.

[0004] In the above-mentioned existing knitted fabric, in order to improve its internal functionality, a first functional coating and a second functional coating are set. At present, the setting of the functional layer is mostly achieved by dipping and rolling to modify the fiber material so that it has high-efficiency functionality. However, the dipping and rolling equipment currently used adopts a fixed roller body or a smaller adjustment method when processing multiple functional layers, which is more likely to cause excess liquid extrusion efficiency and slow efficiency. At the same time, the adaptability is low. In addition, subsequently, when curing the coating, the material is transported smoothly, which makes the liquid's deep curing property low, and the functional coating has a relatively uneven immersion depth. Summary of the invention

[0005] The object 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 technology.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an elastic knitted fabric, comprising an elastic knitted fabric main body, the elastic knitted fabric main body comprising an elastic base layer, an antibacterial layer, a waterproof layer and a skin-friendly layer, the antibacterial layer is bonded to the outer side of the antibacterial layer, and the skin-friendly layer is bonded to the outer side of the waterproof layer.

[0007] Preferably, the elastic base layer, the antibacterial layer, the waterproof layer and the skin-friendly layer are 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 method for preparing an elastic knitted fabric, comprising the following steps:

[0009] S1. Preparation of base layer: blending elastic cotton and spandex fiber into yarn in proportion, and knitting into yarn by double-sided circular knitting machine;

[0010] S2, preparation of antibacterial layer by padding: placing the base fabric into the solvent of the padding equipment, allowing the antibacterial solvent to penetrate into the base fabric and form an antibacterial film layer after curing;

[0011] S3, waterproof layer padding preparation: the base fabric is placed in the solvent of the padding equipment, the waterproof solvent penetrates into the base fabric, and forms a film layer after curing;

[0012] S4, bonding: spray TPU hot melt adhesive on the outside of the woven base layer, and roll it with the prepared antibacterial film layer after preheating. After the initial bonding, spray TPU hot melt adhesive on the outside of the antibacterial film layer, and roll it with the prepared waterproof film layer after preheating;

[0013] S5. Skin-friendly layer lamination: The skin-friendly layer is bonded to the outside of the prepared waterproof membrane layer by means of hot pressing and solidified after a period of time, thus completing the preparation activity.

[0014] Preferably, the dipping and rolling equipment used in steps S2 and S3 includes a first box, a second box, a controller, a first guide roller, a fixed roller, an output roller and a multifunctional processing device, a second box is arranged opposite to the right side of the first box, a controller is installed on the front side of the first box, first guide rollers are arranged on the upper left end of the first box and the upper right end of the second box, fixed rollers are rotatably installed on the lower ends of the first box and the second box, output rollers are installed on the right side of the first box and the left side of the second box, and a multifunctional processing device is arranged between the first box and the second box.

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

[0016] Preferably, the adjustable extrusion assembly includes a base plate, a first motor, a worm, a worm wheel, a screw and an extrusion structure, a first motor is provided on the front side of the upper end of the base plate, the rear side of the first motor is connected to the worm, the lower end of the worm is meshingly connected with a worm wheel, a screw is docked in the middle of the worm wheel, the left and right sides of the screw are threadedly docked with the extrusion structure, and the extrusion structure extends into the first water tank and the second water tank respectively.

[0017] Preferably, the extrusion structure includes a movable seat, a base, a first pressure roller, a first turntable, a first cam, a transmission shaft, a second motor, a second cam, a second turntable and a second pressure roller; the lower end of the movable seat is threadedly connected to one side of the screw, and the lower end of the movable seat is embedded in 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 movable seat is rotatably connected to the first pressure roller, and the first pressure roller extends into the first water storage tank or the second water storage tank; the other side of the upper end of the movable seat is connected to the first turntable, and the first The middle part of the turntable is connected to the middle part of the first pressure roller, the first cam is equidistantly inserted into the outer side of the first turntable, and the first cam on one side is embedded in the outer side of one end of the transmission shaft, the transmission shaft is rotatably connected to the upper end of the base, and a second cam is embedded in the upper end of the other side of the transmission shaft, the second cam is 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 pressure roller, and the second pressure roller extends into the first water tank and the second water tank respectively, and a second motor is docked on one side of the transmission shaft.

[0018] Preferably, the multi-stage tensioning assembly includes a fixed plate, a third motor, a transmission structure and a convex roller. The fixed plate is fixedly arranged on the rear side of the drying box. The third motor is installed on the upper middle end of the fixed plate. The front side of the third motor is connected to 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 box.

[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 arrangement of the drying box, the heating plate and the multi-stage tensioning assembly, that is, when the base cloth is moved into the drying box, the heating plate arranged at the upper end of the drying box can be operated to realize the rapid drying and curing molding of the impregnated base cloth, and in order to enhance the curing penetration of the solvent, the base cloth can be connected with the convex rollers at various locations inside the drying box to realize the multi-stage bending state of the base cloth. At this time, in conjunction with the rotation transmission of the main rotating wheel and the same direction transmission of the first belt and the second belt connected at both sides of the outer end, the first sub-rotor and the second sub-rotor can be made to rotate in the same direction, and the first sub-rotor and the second sub-rotor can also realize the same direction rotation of the first sub-rotor and the second sub-rotor at various locations through the transmission effect of the third belt and the fourth belt correspondingly installed at the outer end. In this way, the convex roller connected to the front end of the first sub-rotor and the second sub-rotor at various locations and arranged inside the drying box will realize the intermittent tensioning of the base cloth to intermittently stretch the base cloth fibers, deepen the curing penetration of the solvent, and ensure the quality of the antibacterial impregnation and the waterproof impregnation, that is, ensure the preparation quality of the antibacterial layer and the waterproof layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the main structure of the elastic knitted fabric of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the dipping equipment of the present invention;

[0028] Figure 3 This is a schematic diagram of the internal structure of the multifunctional processing device of the present invention;

[0029] Figure 4 It is a schematic diagram of the three-dimensional structure of the adjustable extrusion assembly of the present invention;

[0030] Figure 5 It is a schematic diagram of the three-dimensional structure of the extruded structure of the present invention;

[0031] Figure 6 It is a schematic diagram of the three-dimensional structure of the multi-section tensioning assembly of the present invention;

[0032] Figure 7 It is a three-dimensional structural schematic diagram of the transmission structure of the present invention.

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

[0034] In order to further explain the technical solution of the present invention, it is described in detail below through specific embodiments.

[0035] See also 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, 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.

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

[0037] The present invention provides a method for preparing an elastic knitted fabric, comprising the following steps:

[0038] S1. Preparation of base layer: blend elastic cotton (85%-92%) and spandex fiber (8%-15%) into yarn, and knit it into shape through a double-sided circular knitting machine, wherein spandex provides bidirectional elasticity, and elastic cotton provides softness and breathability;

[0039] S2, preparation of antibacterial layer by padding: placing the base fabric in a solvent of a padding device, allowing the antibacterial solvent to penetrate into the base fabric and form an antibacterial film layer after curing, wherein the antibacterial solvent can be a composite of one or more of a nanosilver dispersion, a quaternary ammonium salt compound or a natural plant extract;

[0040] S3. Preparation of waterproof layer by padding: placing the base fabric in the solvent of the padding equipment, allowing the waterproof solvent to penetrate into the base fabric and form a film layer after solidification, wherein the waterproof solvent is composed of a bio-based polyurethane resin solution, the bio-based polyurethane resin is dissolved in the bio-based solvent, and mixed with an auxiliary agent to form a homogeneous solution, and a film or coating is formed by steps such as scraping, dipping, and phase separation, so as to form a waterproof film state;

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

[0042] S5. Lamination of skin-friendly layer: Bond the skin-friendly layer to the outside of the prepared waterproof membrane layer by hot pressing bonding (temperature 110-130°C, time 10-15 seconds), and solidify after a period of time to complete the preparation activity. The skin-friendly layer can be made of mercerized cotton, modal or Tencel.

[0043] See also Figure 2 The impregnation and rolling 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 multifunctional processing device 8. The second box body 3 is oppositely arranged on the right side of the first box body 2, and the controller 4 is installed on the front side of the first box body 2. The upper left end of the first box body 2 and the upper right end of the second box body 3 are both provided with a first guide roller 5 for feeding transmission, and the lower ends of the first box body 2 and the second box body 3 are both rotatably provided with a fixed roller 6. Through the setting of the fixed roller 6, the fabric can be transmitted to the lower ends of the first box body 2 and the second box body 3 to ensure sufficient subsequent impregnation. The right side of the first box body 2 and the left side of the second box body 3 are both provided with an output roller 7 for discharging transmission, and a multifunctional processing device 8 is arranged between the first box body 2 and the second box body 3.

[0044] See also Figure 3The multifunctional 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. The first water storage tank 82 is opened on the left side of the water storage tank 81, and the second water storage tank 83 is opened on the right side of the water storage tank 81. In addition, the lower ends of the first water storage tank 82 and the second water storage tank 83 are both connected to the drainage pipe port. An adjustable extrusion component 84 is provided on the side, and the adjustable extrusion component 84 extends into the first water storage tank 82 and the second water storage tank 83 respectively, so as to meet the adjustable extrusion activity 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 that the fabric is stably transmitted to the inside of the drying box 86. The drying box 86 is respectively connected to the upper end of the first box body 2 or the second box body 3. A heating plate 87 is installed at the upper end of the drying box 86, and a second support roller 88 is provided on one side of the outlet end of the drying box 86. A multi-section tensioning component 89 is installed inside the drying box 86.

[0045] See also Figure 4-5 The adjustable extrusion assembly 84 in this embodiment includes a base plate 841, a first motor 842, a worm 843, a worm wheel 844, a screw 845 and an extrusion structure 846. The first motor 842 is provided on the front side of the upper end of the base plate 841, and the rear side of the first motor 842 is connected to the worm 843. The lower end of the worm 843 is meshedly connected with the worm wheel 844. The middle part of the worm wheel 844 is laterally connected with a screw 845, and the external threads on the left and right sides of the screw 845 are in opposite states. The left and right sides of the screw 845 are threadedly connected 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] The extrusion structure 846 includes a moving seat 8461, a base 8462, a first pressing roller 8463, a first rotating disk 8464, a first cam 8465, a transmission shaft 8466, a second motor 8467, a second cam 8468, a second rotating disk 8469 and a second pressing roller 84610. The interior of the lower end of the moving seat 8461 is threadedly connected with the external thread on one side of the screw 845, and the lower end of the moving seat 8461 is embedded in the interior of the base 8462. In this way, as the screw 845 rotates, the moving seat 8461 can be 1 along the lateral end of the upper end of the base 8462 to achieve flexible adjustment of the subsequent extrusion spacing, 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 movable 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 front side of the upper end of the movable seat 8461 is connected to the first rotating disk 8464, and the middle of the first rotating disk 8464 is aligned with the middle of the first pressing roller 8463. The first rotating disk 8464 and the first pressing roller 8463 are connected to each other in the same direction. A plurality of first convex shafts 8465 are inserted at equal distances along the circular track on the outer side of the first rotating disk 8464, and the first convex shaft 8465 on one side 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. In addition, the left and right sides of the transmission shaft 8466 are arranged in opposite spiral shapes, and the left spiral end of the transmission shaft 8466 is embedded with a second convex shaft 8468. The second convex shaft 8468 is equidistant along the circular track. It is arranged at the outer end of the second turntable 8469, and the second convex shaft 8468 and the second turntable 8469 and the first convex shaft 8465 and the first turntable 8464 have the same structural quantity, the second turntable 8469 is rotatably connected to the upper end of the base 8462 away from the movable seat 8461, the middle part of the second turntable 8469 is connected to the middle part of the second pressure roller 84610, and the second pressure roller 84610 extends into the first water tank 82 and the second water tank 83 respectively, and the second motor 8467 is docked with one side of the transmission shaft 8466.

[0047] See also Figure 6-7 The multi-stage tensioning assembly 89 in this embodiment includes a fixed plate 891, a third motor 892, a transmission structure 893 and a convex roller 894. The fixed plate 891 is fixedly connected to the rear side of the drying box 86. The third motor 892 is installed at the upper end of the middle part 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. The convex roller 894 is equidistantly installed inside the drying box 86. The convex roller 894 is equidistantly arranged at six locations inside the drying box 86, and the convex roller 894 is arranged in an alternating direction up and down.

[0048] The transmission structure 893 includes 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, and the first belt 8932 and the second belt 8933 are inclined in the opposite direction. The first belt 8932 is installed in the direction of rotation, one end of the first belt 8932 away from the main rotating wheel 8931 is connected to the outside of the first secondary rotating wheel 8934, the second belt 8933 is connected to the outside of the second secondary rotating wheel 8936 away from the main rotating wheel 8931, the third belt 8935 is connected to the outside of the first secondary rotating wheel 8934, the fourth belt 8937 is connected to the outside of the second secondary rotating wheel 8936, and the front ends of the first secondary rotating wheel 8934 and the second secondary rotating wheel 8936 are connected to the convex roller 894.

[0049] Among them, the number of first auxiliary wheels 8934 and the number of second auxiliary wheels 8936 are consistent, both are three, and the adjacent first auxiliary wheels 8934 or the adjacent second auxiliary wheels 8936 are respectively connected by the third belt 8935 or the fourth belt 8937, so that the linkage docking of the three first auxiliary wheels 8934 or the second auxiliary wheels 8936 can be realized, and due to the corresponding docking effect of the first belt 8932 and the second belt 8933, the three first auxiliary wheels 8934 and the second auxiliary wheels 8936 on both sides can rotate in the same direction.

[0050] Working principle:

[0051] First, when the antibacterial layer 12 and the waterproof layer 13 are to be dipped, the base fabric can be connected to 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 respectively. At the same time, the base fabrics on both sides are moved into the first water storage tank 82 and the second water storage tank 83 respectively, and connected 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 carry out the discharging activity along the second supporting roller 88, so as to complete the placement of the base fabrics to be dipped in the antibacterial layer 12 and the waterproof layer 13;

[0052] When the base fabric enters the first box body 2 and the second box body 3 respectively, the antibacterial solvent and the waterproof solvent in the first box body 2 and the second box body 3 will invade the corresponding base fabric to realize the antibacterial impregnation and waterproof impregnation activities. After the impregnation activities are 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 squeezing effect of the first pressing roller 8463 and the second pressing roller 84610, the excess solvent in the base fabric will be squeezed out to avoid carrying too much solvent and affecting the subsequent drying and curing efficiency. The squeezed excess solvent will be collected in the first water storage tank 82 and the second water storage tank 82 respectively. The water tank 83 is internally connected to the drain pipes corresponding to the lower ends of the first water storage tank 82 and the second water storage tank 83, and the external discharge recovery activity is carried out. In order to improve the extrusion flexibility, the first motor 842 provided at the upper end of the bottom plate 841 can be driven to make the first motor 842 realize the rotation of the worm 843 connected to the output end. As the worm 843 rotates, the worm wheel 844 meshed with the lower end of the worm 843 will rotate accordingly, and the worm wheel 844 correspondingly drives the rotation of the middle horizontal docking screw 845. In this way, as the screw 845 rotates, the movable seat 8462 which is threadedly connected to the left and right sides of the screw 845 and embedded in one side of the base 8462 is 461, will realize left or right movement. When the moving seat 8461 moves, the first rotating disk 8464 connected to the front side of the first pressing roller 8463 will cooperate with the first convex shaft 8465 equidistantly arranged on the outside to rotate along the spiral end of one side of the transmission shaft 8466 to ensure that its position is consistent with the front and rear of the first pressing roller 8463. When the moving seat 8461 drives the first pressing roller 8463 to move, the first rotating disk 8464 connected to the front side of the first pressing roller 8463 will rotate along the spiral end of one side of the transmission shaft 8466 to ensure that its position is consistent with the front and rear of the first pressing roller 8463. After the whole is completed, the transmission shaft 8466 can be rotated as a whole by driving the second motor 8467 connected to one end of the transmission shaft 8466, thereby the first convex shaft 8465 and the second convex shaft 8468 respectively connected to the opposite spiral ends on both sides of the transmission shaft 8466 will respectively realize the synchronous opposite rotation of the first turntable 8464 and the second turntable 8469 to quickly realize the extrusion and transmission activities of the impregnated base cloth. 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 excess solvent extrusion activities of the antibacterial impregnation and waterproof impregnation activities are carried out at the same time, shortening the working sequence and accelerating the subsequent preparation efficiency.

[0053] When the base fabrics on both sides complete the extrusion activity respectively and enter the drying box 86 symmetrically arranged on both sides, the heating plate 87 arranged at the upper end of the drying box 86 will be used to realize a large-scale heating and drying activity of the base fabrics entered, so that the antibacterial solvent and the waterproof solvent will be quickly cured to form the antibacterial layer 12 and the waterproof layer 13. When the base fabrics enter the drying box 86, they will alternately pass through the outside of the six convex rollers 894 in turn to make the base fabric present a multi-section bending 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, thereby ensuring the quality of the immersion preparation of the antibacterial layer 12 and the waterproof layer 13. At the same time, when the drying and curing activity is carried out, the third motor 892 arranged in the middle of the upper end of the fixed plate 891 can be operated to enable the third motor 892 to realize the rotation of the main rotating wheel 8931 connected to the front side. When the main rotating wheel 8931 rotates, the first belt 8932 and the second belt 8933 connected to the two sides of the outer end of the main rotating wheel 8931 will rotate in the same direction, thereby, the first auxiliary rotating wheel 8934 and the second auxiliary rotating wheel 8936 connected to the upper ends of the first belt 8932 and the second belt 8933 respectively rotate synchronously, and when the first auxiliary rotating wheel 8934 and the second auxiliary rotating wheel 8936 rotate, the second belt 8933 and the fourth belt 8937 installed correspondingly on the outside can realize the same direction rotation of the externally connected rotating wheels, thereby, the six convex rollers 894 connected to the front sides of the first auxiliary rotating wheel 8934 and the second auxiliary rotating wheel 8936 respectively and installed in the drying box 86 can rotate in the same direction to realize multi-stage tensioning of the base cloth, thereby greatly improving the curing molding quality of the solvent and the base cloth.

[0054] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing an elastic knitted fabric, characterized in that: The steps include: S1. Preparation of base layer: blending elastic cotton and spandex fiber into yarn in proportion, and knitting into yarn by double-sided circular knitting machine; S2, preparation of antibacterial layer by padding: placing the base fabric into the solvent of the padding equipment, allowing the antibacterial solvent to penetrate into the base fabric and form an antibacterial film layer after curing; S3, waterproof layer padding preparation: the base fabric is placed in the solvent of the padding equipment, the waterproof solvent penetrates into the base fabric, and forms a film layer after curing; S4, bonding: spray TPU hot melt adhesive on the outside of the woven base layer, and roll it with the prepared antibacterial film layer after preheating. After the initial bonding, spray TPU hot melt adhesive on the outside of the antibacterial film layer, and roll it with the prepared waterproof film layer after preheating; S5. Skin-friendly layer lamination: the skin-friendly layer is bonded to the outside of the prepared waterproof membrane layer by means of hot pressing and solidified for a period of time to complete the preparation activity; The padding equipment used in the steps S2 and S3 comprises a first box (2), a second box (3), a controller (4), a first guide roller (5), a fixed roller (6), an output roller (7) and a multifunctional processing device (8), wherein the second box (3) is arranged opposite to the right side of the first box (2), the controller (4) is installed on the front side of the first box (2), the first guide roller (5) is arranged on the upper left side of the first box (2) and the upper right side of the second box (3), the fixed roller (6) is rotatably installed on the lower inner ends of the first box (2) and the second box (3), the output roller (7) is installed on the right side of the first box (2) and the left side of the second box (3), and the multifunctional processing device (8) is arranged between the first box (2) and the second box (3).

2. The method for preparing an elastic knitted fabric according to claim 1, characterized in that: The multifunctional processing device (8) comprises 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). The first water storage tank (82) is provided on the left side of the water storage tank (81), and the second water storage tank (83) is provided on the right side of the water storage tank (81). An adjustable extrusion assembly (84) is provided at the front side of the box (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 box (86), and the drying box (86) is connected to the upper end of the first box body (2) or the second box body (3) respectively. A heating plate (87) is installed at the upper end of the drying box (86), and a second support roller (88) is provided on the other side of the drying box (86). A multi-stage tensioning assembly (89) is installed inside the drying box (86).

3. The method for preparing an elastic knitted fabric according to claim 2, characterized in that: The adjustable extrusion assembly (84) comprises a base plate (841), a first motor (842), a worm (843), a worm wheel (844), a screw (845) and an extrusion structure (846); the first motor (842) is provided on the front side of the upper end of the base plate (841); the rear side of the first motor (842) is connected to the worm (843); the lower end of the worm (843) is meshingly connected to the worm wheel (844); the middle part of the worm wheel (844) is butt-jointed with a screw (845); the left and right sides of the screw (845) are both threadedly butt-jointed 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.

4. The method for preparing an elastic knitted fabric according to claim 3, characterized in that: The extrusion structure (846) comprises a movable seat (8461), a base (8462), a first pressing roller (8463), a first rotating disk (8464), a first cam shaft (8465), a transmission shaft (8466), a second motor (8467), a second cam shaft (8468), a second rotating disk (8469) and a second pressing roller (84610). The lower end of the movable seat (8461) is threadedly connected to one side of the screw rod (845), and the movable seat (8461) is connected to the screw rod (845) by a screw thread. The lower end of the movable seat (8461) is embedded in 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 movable seat (8461) is rotatably connected to a 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), and the other side of the upper end of the movable seat (8461) is connected to a first rotating disk (8464). ), and the middle of the first rotating disk (8464) is connected to the middle of the first pressing roller (8463), the first convex shaft (8465) is inserted equidistantly on the outside of the first rotating disk (8464), and one side of the first convex shaft (8465) is embedded in the outside of one end of the transmission shaft (8466), the transmission shaft (8466) is rotatably connected to the upper end of the base (8462), and the other side of the transmission shaft (8466) is embedded with a second convex shaft (8468), The second convex shaft (8468) is equidistantly arranged at the outer end of the second rotating disk (8469), and the second rotating disk (8469) is rotatably connected to the upper end of the base (8462), the middle of the second rotating disk (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, and the second motor (8467) is connected to one side of the transmission shaft (8466).

5. The method for preparing an elastic knitted fabric according to claim 2, characterized in that: 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).

6. The method for preparing an elastic knitted fabric according to claim 5, characterized in that: 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).

7. The method for preparing an elastic knitted fabric according to claim 6, 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).

8. An elastic knitted fabric, according to the method for preparing an elastic knitted fabric according to any one of claims 1 to 7, 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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