Polyester-spandex-rayon three-layer composite fabric and preparation method thereof

Abstract

The invention belongs to the technical field of fabrics, and particularly relates to a polyester-spandex three-layer composite fabric and a preparation method thereof.The polyester-spandex three-layer composite fabric comprises an inner layer, a breathable layer is fixedly connected to the outer surface of the inner layer, an outer layer is fixedly connected to the outer surface of the breathable layer, and meshes are formed in the surface of the outer layer and the surface of the breathable layer; a temperature control wire harness is inserted into the inner wall of the mesh, a capsule is fixedly connected to the inner wall of the temperature control wire harness, and the capsule is filled with a temperature control block. According to the terylene-spandex three-layer composite fabric and the preparation method, the holes are formed in the surface of the traditional terylene-spandex three-layer composite fabric, and the temperature control wire harness embedded with the phase-change material is inserted, so that the fabric has a temperature self-adjusting function, the temperature of clothes can be automatically adjusted according to the change of the external environment temperature, the wearing comfort is improved, and the fabric is suitable for popularization and application. The air permeability of the fabric is further improved through the gaps of the holes in the surface of the fabric, so that the fabric is more suitable for the field of outdoor sports.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fabrics, and particularly relates to a polyester-spandex three-layer composite fabric and a preparation method thereof. BACKGROUND

[0002] The polyester-spandex three-layer composite fabric is a kind of high-performance fabric commonly used in the modern textile industry, and is widely used in the fields of outdoor clothing, sportswear, wind clothes, rain clothes and the like. It combines fabrics of different materials through multi-layer composite technology to improve the functionality and comfort of the fabric. However, when performing some outdoor activities, the overall air permeability is reduced due to the stacking of the multi-layer composite fabric, and the fabric does not have temperature control performance in a hot environment, which makes the user feel overheated when wearing the clothes, and it is not convenient to ventilate and dissipate heat, thereby not being convenient to use in a hot environment. SUMMARY

[0003] In view of the technical problem that the existing polyester-spandex three-layer composite fabric is not convenient to use in a hot environment, the present application provides a polyester-spandex three-layer composite fabric and a preparation method thereof.

[0004] The polyester-spandex three-layer composite fabric provided by the present application comprises an inner layer, the outer surface of the inner layer is fixedly connected with a breathable layer, the outer surface of the breathable layer is fixedly connected with an outer layer, the surface of the outer layer and the surface of the breathable layer are both provided with mesh holes, the inner wall of the mesh hole is inserted with a temperature control wire bundle, the inner wall of the temperature control wire bundle is fixedly connected with a capsule, and the capsule is filled with a temperature control block.

[0005] Preferably, the material of the inner layer is spandex blended fabric, the material of the breathable layer is polyester fiber, and the material of the outer layer is polyester.

[0006] Through the above technical solution, the inner layer is prepared by using spandex blended fabric, so as to conveniently increase the comfort and elasticity of the fabric.

[0007] Preferably, the material of the temperature control wire bundle and the material of the capsule are both polyethylene, and the material of the temperature control block is a phase change material.

[0008] Through the above technical solution, the temperature control block is prepared by using a phase change material, so that the fabric has the function of self-regulating temperature, can automatically adjust the temperature of the clothes according to the change of the external environment temperature, and improves the wearing comfort.

[0009] The application discloses a preparation method of a polyester ammonia pull frame three-layer composite fabric, and the preparation method comprises the following steps: step 1, preparing an inner layer, a breathable layer and an outer layer raw material, preparing a phase change material, mixing glycerol and stearic acid at a ratio of 1:1, heating in a water bath at a temperature of 80-85 DEG C, and stirring to promote mixing until the mixture is melted into a liquid state, and then heating to 85-90 DEG C, eutectic of sugar alcohol and fatty acid, and naturally cooling to 25-30 DEG C;

[0010] Step 2, filling the phase change material into capsules, heating polyethylene and forming a temperature control wire bundle through an extruder, filling the capsules into the temperature control wire bundle, and heating the breathable layer and the outer layer through a hot press at a high temperature of 100-170 DEG C for 5-7 seconds;

[0011] Step 3, punching holes on the surface of the combined outer layer and breathable layer through a laser punching machine, the laser punching temperature is 300-400 DEG C, the punching time is 2 seconds per hole, the temperature control wire bundle and the processed breathable layer are connected to a threading machine, and the temperature control wire bundle is alternately threaded through the mesh holes on the surface of the breathable layer;

[0012] Step 4, bonding the inner layer and the breathable layer through a hot melt adhesive machine, naturally cooling to 25-30 DEG C after bonding and fixing;

[0013] Step 5, washing and drying the fabric through a washing machine and a drying machine, and detecting the fabric through a quality inspection equipment.

[0014] Preferably, the extruder in step 2 comprises an extruder body and a cooling pool, a mounting seat is fixedly connected to the surface of the discharge port of the extruder body, a cooling groove is formed in the inside of the mounting seat, the lower surface of the cooling pool is fixedly connected with the inner bottom wall of the cooling groove, a stuffing mechanism is installed on the upper surface of the mounting seat, the stuffing mechanism comprises a pushing pipe, a feeding hole is formed in the outer surface of the pushing pipe, the surface of the pushing pipe is slidably inserted into the upper end of the mounting seat, an upper feeding mechanism is fixedly connected to the upper surface of the mounting seat, the upper feeding mechanism comprises a guide plate, a guide groove is formed in the inside of the guide plate, the guide groove is inclined, the surface of one end of the guide plate is slidably sleeved with the upper end of the pushing pipe, and the lower surface of the guide plate is fixedly connected with the upper surface of the mounting seat.

[0015] Through the technical scheme, the capsules are conveyed by the pushing pipe and inserted into the temperature control wire bundle, so that the capsules are embedded into the temperature control wire bundle.

[0016] Preferably, the upper surface of the mounting seat is fixedly connected with a driving box through a stand column, driving gears and driven gears are rotatably connected to the inner wall of the driving box through a rotating shaft, the two driven gears are located on the two sides of the driving gear, and the outer surfaces of the driving gear and the driven gears are engaged through clamping teeth.

[0017] Through the technical scheme, the two driven gears are driven by the driving gear at the same time, so that the two driven gears rotate synchronously and in the same direction.

[0018] Preferably, the surface of the driven gear is fixedly connected with a special-shaped gear, the inner side wall surface of the driving box is slidably connected with a rack through a limiting block, the outer surfaces of the two sides of the rack are both provided with clamping teeth, the two special-shaped gears are located on the two sides of the rack respectively, the lower surface of the rack is fixedly connected with the upper end of the pushing pipe, the upper end of the pushing pipe is slidably inserted with the lower end surface of the driving box, the outer surface of the driving box is fixedly connected with a driving motor, and the output shaft of the driving motor is drivingly connected with the driving gear through a rotating shaft.

[0019] Through the technical scheme, the two special-shaped gears alternately drive the surface of the rack in opposite directions, so that the rack is lifted and lowered under the driving of the special-shaped gears.

[0020] Preferably, the inner bottom wall of the mounting seat is fixedly connected with a base, the base is located directly below the pushing pipe, the inner top wall of the mounting seat is fixedly connected with a spring, the lower surface of the spring is fixedly connected with a material returning rod, the material returning rod is L-shaped, the upper surface of one end of the material returning rod is slidably sleeved with the lower end surface of the pushing pipe, and the lower end surface of the pushing pipe is fixedly sleeved with a pressing disc.

[0021] Through the technical scheme, the material returning rod is pressed downward by the pressing disc, so that the temperature control wire harness is prevented from adhering to the lower end of the pushing pipe, the temperature control wire harness is pressed into the cooling pool, and a catching structure can be installed at the lower end of the pushing pipe, so that the surface of the temperature control wire harness is accurately pressed.

[0022] Preferably, the upper surface of the mounting seat is fixedly connected with a connecting block, the upper end of the connecting block is slidably inserted with a rubber hose, the lower end of the rubber hose is in communication with the inside of the material guide plate through the connecting block, and the upper end of the rubber hose is fixedly connected with a discharging hopper.

[0023] Through the technical scheme, the discharging hopper is movably installed, so that the discharging hopper is shaken under the action of an external force, and the discharging hopper can be supported by the spring to keep stable.

[0024] Preferably, the upper end surface of the rubber hose is fixedly sleeved with a connecting rod, and one end of the connecting rod is fixedly connected with the outer surface of the driving motor.

[0025] Through the technical scheme, the rubber hose is connected with the driving motor through the connecting rod, so that the vibration of the driving motor during operation is transmitted to the rubber hose.

[0026] The beneficial effects in the application are:

[0027] 1. By setting openings on the surface of the traditional polyester-spandex three-layer composite fabric and inserting temperature control wires embedded with phase change materials, the fabric has a self-regulating temperature function. It can automatically adjust the temperature of the clothing according to changes in the external ambient temperature, improving wearing comfort. The openings on the fabric surface further increase the breathability of the fabric, making it more suitable for outdoor sports.

[0028] 2. A temperature control wire harness is prepared by setting up an extruder and installing an inserting mechanism at the discharge port of the extruder body. The inserting mechanism inserts the capsule containing the phase change material into the temperature control wire harness. At the same time, the push tube in the inserting mechanism is reciprocated by a drive motor. The vibration of the drive motor during operation is utilized to promote the feeding of the rubber hose, thereby facilitating the insertion of the capsule into the temperature control wire harness. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a polyester-spandex three-layer composite fabric and its preparation method proposed in this invention;

[0030] Figure 2 This is a cross-sectional view of the outer layer structure of a polyester-spandex three-layer composite fabric and its preparation method proposed in this invention;

[0031] Figure 3 This is a cross-sectional view of the temperature control wire harness structure of a polyester-spandex three-layer composite fabric and its preparation method proposed in this invention;

[0032] Figure 4 This is a three-dimensional view of the extruder body structure of the polyester / spandex three-layer composite fabric and its preparation method proposed in this invention.

[0033] Figure 5 This is a cross-sectional view of the mounting base structure of a polyester-spandex three-layer composite fabric and its preparation method proposed in this invention;

[0034] Figure 6 This is a cross-sectional view of the drive box structure of the polyester-spandex three-layer composite fabric and its preparation method proposed in this invention.

[0035] Figure 7 This is a three-dimensional view of the toothed structure of a polyester / spandex three-layer composite fabric and its preparation method proposed in this invention;

[0036] Figure 8 This is a perspective view of the drive gear structure of a polyester / spandex three-layer composite fabric and its preparation method proposed in this invention.

[0037] Figure 9 This is a cross-sectional view of the guide plate structure of a polyester-spandex three-layer composite fabric and its preparation method proposed in this invention.

[0038] In the diagram: 1. Inner layer; 2. Breathable layer; 3. Outer layer; 4. Temperature control harness; 5. Capsule; 6. Extruder body; 7. Cooling pool; 71. Mounting base; 8. Push tube; 81. Drive box; 82. Drive gear; 83. Driven gear; 84. Special gear; 85. Rack; 86. Drive motor; 87. Spring; 88. Unloading rod; 89. Extrusion disc; 9. Guide plate; 91. Connecting block; 92. Rubber hose; 93. Discharge hopper; 94. Connecting rod. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0040] Reference Figures 1-3 A three-layer composite fabric of polyester / spandex stretch fabric includes an inner layer 1, a breathable layer 2 fixedly connected to the outer surface of the inner layer 1, and an outer layer 3 fixedly connected to the outer surface of the breathable layer 2. Both the outer layer 3 and the breathable layer 2 have mesh openings. A temperature control harness 4 is inserted into the inner wall of the mesh openings, and a capsule 5 is fixedly connected to the inner wall of the temperature control harness 4. A temperature control block is filled inside the capsule 5. The inner layer 1 is made of spandex blended fabric, the breathable layer 2 is made of polyester fiber, and the outer layer 3 is made of polyester. Using spandex blended fabric to prepare the inner layer 1 increases the fabric's comfort and elasticity. The temperature control harness 4 and the capsule 5 are both made of polyethylene, and the temperature control block is made of phase change material. Using phase change material to prepare the temperature control block gives the fabric a self-regulating temperature function, allowing it to automatically adjust the clothing temperature according to changes in the external ambient temperature, thus improving wearing comfort.

[0041] A method for preparing a three-layer composite fabric of polyester / spandex stretch fabric, comprising the following steps: Step 1: Prepare the inner layer 1, breathable layer 2, and outer layer raw materials; prepare a phase change material by mixing glycerol and stearic acid in a 1:1 ratio, heating in a water bath at 80-85 degrees Celsius while stirring to promote mixing until the mixture melts into a liquid state, continuing heating to 85-90 degrees Celsius to form a eutectic of sugar alcohol and fatty acids, and then naturally cooling to 25-30 degrees Celsius; Step 2: Fill the phase change material into capsules 5; heat polyethylene and extrude it into a temperature-controlled wire harness 4; fill the capsules 5 into the temperature-controlled wire harness 4; and connect the breathable layer 2 and outer layer 3. Step 1: Heat the fabric at a high temperature of 100-170 degrees Celsius for 5-7 seconds using a hot press. Step 2: Use a laser punching machine to punch holes in the combined outer layer 3 and breathable layer 2. The laser punching temperature is 300-400 degrees Celsius, and the punching time is 2 seconds per hole. Connect the temperature control wire harness 4 and the processed breathable layer 2 to the threading machine. The threading machine alternately passes the temperature control wire harness 4 through the mesh on the surface of the breathable layer 2. Step 3: Use a hot melt adhesive machine to bond the inner layer 1 to the breathable layer 2. After bonding and fixing, allow it to cool naturally to 25-30 degrees Celsius. Step 4: Wash and dry the fabric using a washing machine and a dryer, and then test it using quality inspection equipment.

[0042] Reference Figures 4-9 A method for preparing a polyester-spandex three-layer composite fabric, wherein the extruder in step two includes an extruder body 6 and a cooling tank 7. A mounting base 71 is fixedly connected to the discharge port surface of the extruder body 6. A cooling groove is opened inside the mounting base 71. The lower surface of the cooling tank 7 is fixedly connected to the inner bottom wall of the cooling groove. An inserting mechanism is installed on the upper surface of the mounting base 71. The inserting mechanism includes a pusher tube 8. A feed hole is opened on the outer surface of the pusher tube 8. The surface of the pusher tube 8 is slidably inserted into the upper end of the mounting base 71. A feeding mechanism is fixedly connected to the upper surface of the mounting base 71. The feeding mechanism includes a guide plate 9. A guide groove is opened inside the guide plate 9. The guide groove is inclined. One end surface of the guide plate 9 is slidably sleeved with the upper end of the pusher tube 8. The lower surface of the guide plate 9 is fixedly connected to the upper surface of the mounting base 71. The capsule 5 is conveyed by the pusher tube 8 and inserted downward into the temperature control wire harness 4, thereby facilitating the embedding of the capsule 5 into the temperature control wire harness 4.

[0043] By setting openings on the surface of the traditional polyester-spandex three-layer composite fabric and inserting a temperature control harness 4 inlaid with phase change material, the fabric has a self-regulating temperature function. It can automatically adjust the temperature of the clothing according to changes in the external ambient temperature, improving wearing comfort. Furthermore, the openings on the fabric surface increase the breathability of the fabric, making it more suitable for outdoor sports.

[0044] To achieve the reciprocating motion of the push tube 8, a drive box 81 is fixedly connected to the upper surface of the mounting base 71 via a column. The inner wall of the drive box 81 is rotatably connected to a drive gear 82 and a driven gear 83 via a rotating shaft. The two driven gears 83 are located on either side of the drive gear 82. The outer surface of the drive gear 82 meshes with the outer surface of the driven gear 83 via locking teeth, allowing the drive gear 82 to simultaneously drive both driven gears 83, thus facilitating synchronous and co-directional rotation. A non-circular gear 84 is fixedly connected to the surface of the driven gear 83. A rack 85 is slidably connected to the inner wall surface of the drive box 81 via a limiting block. Locking teeth are provided on both outer surfaces of the rack 85. Two non-circular gears 84 are located on either side of the rack 85. The lower surface of the rack 85 is fixedly connected to the upper end of the push tube 8, and the upper end of the push tube 8 is slidably inserted into the lower surface of the drive box 81. The outer surface of the drive box 81 is fixedly connected to... A drive motor 86 is connected, and the output shaft of the drive motor 86 is connected to the drive gear 82 through a rotating shaft transmission. Two irregular gears 84 are used to alternately drive the surface of the rack 85 in opposite directions, so that the rack 85 can be raised and lowered under the drive of the irregular gears 84. A base is fixedly connected to the inner bottom wall of the mounting base 71. The base is located directly below the push tube 8. A spring 87 is fixedly connected to the inner top wall of the mounting base 71. A ejector rod 88 is fixedly connected to the lower surface of the spring 87. The ejector rod 88 is L-shaped. The upper surface of one end of the ejector rod 88 is slidably sleeved with the lower surface of the push tube 8. An extrusion plate 89 is fixedly sleeved on the lower surface of the push tube 8. The ejector rod 88 is pressed downward by the extrusion plate 89, so as to avoid the temperature control wire harness 4 from sticking to the lower end of the push tube 8. At the same time, the temperature control wire harness 4 is pressed into the cooling pool 7. A capture structure can also be installed at the lower end of the push tube 8 to facilitate accurate pressing of the surface of the temperature control wire harness 4.

[0045] To facilitate the feeding of capsule 5, a connecting block 91 is fixedly connected to the upper surface of the mounting base 71. A rubber hose 92 is slidably inserted into the upper end of the connecting block 91. The lower end of the rubber hose 92 is connected to the interior of the guide plate 9 through the connecting block 91. A feeding hopper 93 is fixedly connected to the upper end of the rubber hose 92. The feeding hopper 93 is movable, which facilitates shaking of the feeding hopper 93 under the action of external force. The feeding hopper 93 can also be supported by a spring 87 to maintain its stability. A connecting rod 94 is fixedly sleeved on the upper surface of the rubber hose 92. One end of the connecting rod 94 is fixedly connected to the outer surface of the drive motor 86. The connecting rod 94 connects the rubber hose 92 to the drive motor 86, which facilitates the transmission of vibration from the drive motor 86 during operation to the rubber hose 92.

[0046] The temperature control wire harness 4 is prepared by setting it in the extruder equipment, and an inserting mechanism is installed at the discharge port end of the extruder body 6. The inserting mechanism inserts the capsule 5 containing the phase change material into the temperature control wire harness 4. At the same time, the push tube 8 in the inserting mechanism is reciprocated by the drive motor 86, and the vibration of the drive motor 86 during operation is utilized to promote the feeding of the rubber hose 92, thereby facilitating the insertion of the capsule 5 into the temperature control wire harness 4.

[0047] Working principle:

[0048] When in use, start the extruder body 6. The extruder body 6 extrudes the molten polyethylene raw material into a wire bundle shape and enters the mounting base 71. Start the drive motor 86. The drive motor 86 drives the drive gear 82 to rotate. The drive gear 82 drives the special gear 84 to rotate through the driven gear 83. The special gear 84 alternately drives the rack 85. The rack 85 drives the push tube 8 to move up and down reciprocally in the drive box 81.

[0049] Capsules 5 containing phase change material are fed into the hopper 93. Capsules 5 enter the guide plate 9 through the rubber hose 92. As the push tube 8 rises, capsules 5 enter the push tube 8. As capsules 5 fall, they are inserted into the temperature control harness 4. The temperature control harness 4 bonds the push tube 8 and capsules 5 together. The push tube 8 rises again, and the connection between the temperature control harness 4 and the push tube 8 is squeezed and separated by the ejector rod 88. Capsules 5 remain bonded to the temperature control harness 4. The ejector rod 88 pushes the temperature control harness 4 into the cooling pool 7 to cool it down and fix the capsules 5. At the same time, the vibration of the drive motor 86 is transmitted to the rubber hose 92 through the connecting rod 94. Under the action of vibration and gravity, capsules 5 in the rubber hose 92 continue to fall.

[0050] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A polyester-spandex three-layer composite fabric, comprising an inner layer (1), characterized in that: The outer surface of the inner layer (1) is fixedly connected to a breathable layer (2), and the outer surface of the breathable layer (2) is fixedly connected to an outer layer (3). Both the surface of the outer layer (3) and the surface of the breathable layer (2) are provided with mesh holes. A temperature control wire harness (4) is inserted into the inner wall of the mesh holes. A capsule (5) is fixedly connected to the inner wall of the temperature control wire harness (4). The capsule (5) is filled with a temperature control block.

2. The polyester-spandex three-layer composite fabric according to claim 1, characterized in that: The inner layer (1) is made of spandex blended fabric, the breathable layer (2) is made of polyester fiber, and the outer layer (3) is made of polyester.

3. The polyester-spandex three-layer composite fabric according to claim 2, characterized in that: The temperature control harness (4) and the capsule (5) are both made of polyethylene, and the temperature control block is made of phase change material.

4. A method for preparing a polyester-ammonia-stretcher three-layer composite fabric according to any one of claims 1-3, wherein the preparation method is as follows: Step 1, prepare the inner layer (1), the breathable layer (2) and the outer layer raw materials, prepare the phase change material, mix glycerol and stearic acid in a 1:1 ratio, heat in a water bath at a temperature of 80-85 degrees Celsius, and stir to promote mixing until the mixture melts into a liquid state, continue heating to 85-90 degrees Celsius, sugar alcohol and fatty acid eutectic formation, and naturally cool to 25-30 degrees Celsius; Step 2: Fill the capsule (5) with phase change material, heat the polyethylene and extrude it into a temperature control wire harness (4), fill the capsule (5) into the temperature control wire harness (4), heat the breathable layer (2) and the outer layer (3) with a hot press, and hot press them at a high temperature of 100-170 degrees Celsius for 5-7 seconds. Step 3: Drill holes on the surface of the combined outer layer (3) and breathable layer (2) using a laser drilling machine. The laser drilling temperature is 300-400 degrees Celsius and the drilling time is 2 seconds per hole. Connect the temperature control wire harness (4) and the processed breathable layer (2) to the threading machine. The threading machine will alternately pass the temperature control wire harness (4) through the mesh on the surface of the breathable layer (2). Step 4: Use a hot melt adhesive machine to bond the inner layer (1) to the breathable layer (2). After bonding and fixing, allow it to cool naturally to 25-30 degrees Celsius. Step 5: After washing and drying the fabric using a washing machine and a dryer, it is then tested using quality inspection equipment.

5. The method for preparing a polyester-spandex three-layer composite fabric according to claim 4, characterized in that: The extruder in step two includes an extruder body (6) and a cooling tank (7). A mounting base (71) is fixedly connected to the outlet surface of the extruder body (6). A cooling groove is opened inside the mounting base (71). The lower surface of the cooling tank (7) is fixedly connected to the inner bottom wall of the cooling groove. An inserting mechanism is installed on the upper surface of the mounting base (71). The inserting mechanism includes a pusher tube (8). A feed hole is opened on the outer surface of the pusher tube (8). The surface of the pusher tube (8) is slidably inserted into the upper end of the mounting base (71). A feeding mechanism is fixedly connected to the upper surface of the mounting base (71). The feeding mechanism includes a guide plate (9). A guide groove is opened inside the guide plate (9). The guide groove is inclined. One end surface of the guide plate (9) is slidably sleeved with the upper end of the pusher tube (8). The lower surface of the guide plate (9) is fixedly connected to the upper surface of the mounting base (71).

6. The method for preparing a polyester-spandex three-layer composite fabric according to claim 5, characterized in that: The upper surface of the mounting base (71) is fixedly connected to the drive box (81) by a column. The inner wall of the drive box (81) is rotatably connected to the drive gear (82) and the driven gear (83) by a rotating shaft. The two driven gears (83) are located on both sides of the drive gear (82). The outer surface of the drive gear (82) and the outer surface of the driven gear (83) are engaged by a snap-tooth meshing.

7. The method for preparing a polyester-spandex three-layer composite fabric according to claim 6, characterized in that: A shaped gear (84) is fixedly connected to the surface of the driven gear (83). A rack (85) is slidably connected to the inner side wall surface of the drive box (81) through a limiting block. Both outer surfaces of the rack (85) are provided with locking teeth. The two shaped gears (84) are located on both sides of the rack (85). The lower surface of the rack (85) is fixedly connected to the upper end of the push tube (8). The upper end of the push tube (8) is slidably inserted into the lower end surface of the drive box (81). A drive motor (86) is fixedly connected to the outer surface of the drive box (81). The output shaft of the drive motor (86) is connected to the drive gear (82) through a rotating shaft transmission.

8. The method for preparing a polyester-spandex three-layer composite fabric according to claim 7, characterized in that: The mounting base (71) is fixedly connected to the inner bottom wall with a base located directly below the push tube (8). The mounting base (71) is fixedly connected to the inner top wall with a spring (87). The lower surface of the spring (87) is fixedly connected to a ejector rod (88). The ejector rod (88) is L-shaped. The upper surface of one end of the ejector rod (88) is slidably sleeved with the lower surface of the push tube (8). The lower surface of the push tube (8) is fixedly sleeved with an extrusion plate (89).

9. The method for preparing a polyester-spandex three-layer composite fabric according to claim 8, characterized in that: A connecting block (91) is fixedly connected to the upper surface of the mounting base (71). A rubber hose (92) is slidably inserted into the upper end of the connecting block (91). The lower end of the rubber hose (92) is connected to the interior of the guide plate (9) through the connecting block (91). A feeding hopper (93) is fixedly connected to the upper end of the rubber hose (92).

10. The method for preparing a polyester-spandex three-layer composite fabric according to claim 9, characterized in that: A connecting rod (94) is fixedly sleeved on the upper surface of the rubber hose (92), and one end of the connecting rod (94) is fixedly connected to the outer surface of the drive motor (86).

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