CN110409031A - A micro-nano fiber multi-layer structure core-spun yarn spinning device and its production process - Google Patents

Abstract

The invention discloses a core-spun yarn spinning device with a micro-nano fiber multi-layer structure and a production process thereof, which comprises a yarn feeding device, a twisting device, a receiving device and a winding device. The yarn feeding device includes a yarn core on which a Core yarn, the twisting device is composed of the first twisting roller and the second twisting roller, the core yarn is introduced between the first twisting roller and the second twisting roller through the yarn guide rod, and the micro-nano fiber layer is covered to form a package For the core yarn, the winding device includes a bobbin and a winding roller. The core-spun yarn passes through the yarn guide rod, and the winding roller drives the bobbin to wind the core-spun yarn. The core yarn of the present invention adopts conductive heating fiber filament, and the covering fiber adopts PBT chip and PET chip to mix in different proportions to form two kinds of micro-nano fibers with different components, fineness, thickness and bulkiness. The micro-nano fiber core-spun yarn with multiple functions such as conductive heating, heat preservation, antibacterial, and breathable, is soft and comfortable, and can be widely used in the production of various textile fabrics to meet the needs of textile product development.

Description

A micro-nano fiber multi-layer structure core-spun yarn spinning device and its production process

technical field

The invention relates to the technical field of textiles, in particular to a core-spun yarn spinning device with a micro-nano fiber multi-layer structure and a production process thereof.

Background technique

Core-spun yarn, also known as composite yarn or covered yarn, is a yarn composed of two or more fibers. The structure of the core-spun yarn is mainly composed of the core yarn and the covering layer. Generally, the synthetic fiber filament with good strength and elasticity is used as the core yarn, and the outsourcing cotton, wool, chemical fiber and other short fibers are twisted and spun together. . Therefore, the core-spun yarn has both the excellent properties of the filament core yarn and the outer short fiber. The methods of spinning core-spun yarn mainly include ring spinning, friction spinning, and air-jet spinning for core-spun yarn production.

Electric heating fiber is a composite fiber containing electric heating material components. Its principle is to heat through conductive fibers to achieve warmth. At present, the widely used conductive heating fiber is the main carbon fiber. In addition to rapid temperature rise and high electrothermal conversion rate, carbon fiber material also has the function of generating far infrared rays when generating heat. Therefore, using carbon fiber heating materials can be developed. clothing. In recent years, with the development of graphene technology, various graphene heating products are popular in the market, which essentially generate heat through electricity, that is, using an external power supply, the current passes through the resistance of the graphene composite material to generate heat. Whether it is carbon fiber or graphene fiber, the color of the fiber is black or gray-black depending on the content of carbon elements, and the base material of the fiber is mainly nylon or polyester, which severely limits the scope of application.

The melt-blown spinning method uses a high-speed hot air flow to rapidly stretch and solidify the freshly extruded polymer melt to form a spinning method that can produce fibers with a diameter of mainly 1-50 μm, or even less than 1 μm. Because the fibers formed by melt-blown spinning are thin, low in strength, low in fiber orientation, and easy to stick between fibers, melt-blown spinning is mainly used for non-woven fabrics. Its advantage is that the process is short and can be directly made by spinning. non-woven fabric.

Contents of the invention

The purpose of the present invention is to provide a micro-nano fiber multi-layer structure core-spun yarn spinning device and its production process. By wrapping multiple layers of micro-nano fibers on the core yarn, the coating is uniform, the production efficiency is high, and the production The core-spun yarn produced not only has the performance characteristics of surface micro-nano fibers, but also has the conductive and heating properties of the core yarn.

In order to achieve the above invention, the present invention adopts the following technical solutions: a micro-nano fiber multi-layer structure core-spun yarn spinning device, including a yarn feeding device, a twisting device, a receiving device and a winding device, the yarn feeding device It includes a yarn core, a core yarn is arranged on the yarn core, a yarn guide rod is arranged between the yarn feeding device and the twisting device, and the twisting device is composed of a first twisting roller and a second twisting roller, The core yarn is introduced between the first twisting roller and the second twisting roller through a yarn guide rod, and the receiving device includes a mesh curtain, and also includes a spinneret and fibers, and the spinneret is divided into a zone A and a zone A. In zone B, the A zone and the B zone are provided with spinnerets, the spinneret is arranged above the net curtain, the second twisting roller is arranged at the end of the net curtain, and the micro-nano fiber passes through the first Two twisting rollers are wrapped on the core yarn to form a wrapped structural yarn, a yarn guide bar is arranged between the twisting device and the winding device, the winding device includes a bobbin, and the wrapped structural yarn passes through the guide The yarn rod is wound onto the bobbin.

Preferably, the yarn feeding device is provided with a yarn unwinding roller, the yarn unwinding roller is connected to the yarn core, and the core yarn is connected to the yarn guide rod through the yarn unwinding roller.

Preferably, the first twisting roller adopts a structure with a variable diameter, the inclination angle is set between 3-15°, and the diameter of the first twisting roller near the winding device is larger than that of the twisting roller near the yarn feeding The diameter of one end of the device, the second twisting roller adopts a cylindrical structure with a fixed diameter, the first twisting roller and the second twisting roller are both dust cage structures, and there is a non-porous section near the output end, A suction device is installed inside the dust cage, and one end of the suction device is connected to the fan through the air duct.

Preferably, the spinneret is provided with a plurality of spinnerets, the spinnerets are evenly arranged on the spinneret, and the number of spinnerets in the A zone is greater than the number of spinnerets in the B zone. More, the diameter of the spinneret on the A zone is smaller than the diameter of the spinneret on the B zone.

Preferably, the receiving device further includes a non-porous curtain, the non-porous curtain is connected with a net curtain, the net curtain and the non-porous curtain are circularly rotated, and the net curtain is ring-shaped to form a cavity, and the first The two twisting rollers are arranged at one end of the cavity, and the other end of the cavity is provided with a rotating roller, and the mesh curtain is rotated by the rotation of the second twisting roller and the rotating roller.

Preferably, a suction pipe is provided in the cavity, and the end of the suction pipe is arranged under the net curtain.

Preferably, the fiber is made of polybutylene terephthalate PBT and polyethylene terephthalate PET, and the fibers passing through the spinneret in the A zone adopt 70% polyethylene terephthalate Butylene formate and 30 percent polyethylene terephthalate, the fibers that pass through the spinneret in zone B use 30 percent polybutylene terephthalate and 100 percent 70/70 polyethylene terephthalate, the core yarn is a conductive heating fiber filament.

A production process of a core-spun yarn spinning device with a micro-nanofiber multilayer structure, comprising the following steps:

Step 1. Prepare, polybutylene terephthalate slices and polyethylene terephthalate slices are blended and melt-blown according to the proportion, and the core yarn is installed;

Step 2. Start the melt-blown spinning device, start the spinning device, rotate the unwinding roller, pull the core yarn from the yarn core, and pull it to the middle of the first twisting roller and the second twisting roller through the yarn guide rod;

Step 3. The spinneret sprays the blended fibers onto the mesh curtain, and the suction pipe under the mesh curtain is connected to the fan to form a negative pressure on the mesh curtain to gather fibers. The second twisting roller rotates, and the mesh curtain begins to move in a circular manner. The blended fiber moves between the first twisting roll and the second twisting roll, and is wound on the core yarn by the rotation of the first twisting roll and the second twisting roll;

Step 4. The core yarn is wrapped with the blended fiber to form a wrapped structural yarn, which is drawn to the package yarn by the yarn guide rod, and the package yarn is driven by the winding roller to wind the wrapped structural yarn.

Preferably, in step 1, the blended fibers in the A zone and the B zone are mixed in proportion by polybutylene terephthalate and polyethylene terephthalate respectively—drying—screw Machine—melt extrusion—metering pump—spinning assembly—netting.

Preferably, in step 3, both the first twisting roll and the second twisting roll are of dust cage structure, one end is connected to a fan through an air duct to form a negative pressure, and the first twisting roll and the second twisting roll rotate The direction is the same, and the direction of movement is opposite at the tangent of the two twisting rollers.

Compared with the prior art, the micro-nano fiber multi-layer structure core-spun yarn spinning device and its production process adopting the above-mentioned technical scheme have the following beneficial effects: the micro-nano fiber multi-layer structure core-spun yarn of the present invention is used for spinning The device and its production process use two different raw materials to use different melt-blown spinning dies to form two kinds of micro-nano fibers gathered on the mesh curtain, and then rotate the micro-nano fiber layer to cover the core yarn through the principle of friction twisting Forming multi-layer micro-nano fiber covered yarn, the produced multi-layer structure micro-nano fiber core-spun yarn has multiple functions such as heat preservation, antibacterial, breathable, etc., soft and comfortable, and can be widely used in the production of various woven and knitted textile fabrics , to meet the development needs of new textile products.

Description of drawings

Fig. 1 is the structure schematic diagram of the embodiment of the core-spun yarn spinning device with micro-nanofiber multilayer structure of the present invention;

Fig. 2 is the structural representation of spinneret among the present embodiment;

Fig. 3 is a schematic structural view of wrapping structured yarn in this embodiment;

Fig. 4 is the structural representation of the first twisting roller in the present embodiment;

Fig. 5 is a process flow chart of the production process of the core-spun yarn spinning device with a micro-nano fiber multi-layer structure in this embodiment.

Reference signs: 1, yarn feeding device; 11, yarn core; 12, unwinding roller; 2, spinneret; 21, A zone; 22, B zone; 23, spinneret; 3, receiving device; 31, Mesh curtain; 32, non-porous curtain; 4, twisting device; 41, the first twisting roller; 42, the second twisting roller; 5, winding device; 51, winding roller; 52, package yarn; 61, Yarn guide rod; 7, suction pipe; 8, core yarn; 9, fiber.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, it is a schematic structural view of a core-spun yarn spinning device with a micro-nano fiber multilayer structure, including a yarn feeding device 1, a twisting device 4, a receiving device 3 and a winding device 5, and the yarn feeding device 1 consists of a yarn core 11 It is composed of the unwinding roller 12, the unwinding roller 12 is connected with the yarn core 11, the core yarn 8 is arranged on the yarn core 11, the yarn guide rod 61 is arranged between the yarn feeding device 1 and the twisting device 4, and the core yarn 8 passes through The yarn roll 12 is connected to the yarn guide rod 61 . The twisting device 4 is made up of the first twisting roller 41 and the second twisting roller 42, and the core yarn 8 is introduced between the first twisting roller 41 and the second twisting roller 42 through the yarn guide bar 61, as shown in Figure 4 It is a schematic diagram of the structure of the twisting roller. The first twisting roller 41 adopts a structure with a variable diameter, and the β angle is between 3-15°. The diameter of the first twisting roller 41 near the end of the yarn receiving device 5 is larger than that of the first twisting roller 41 is close to the diameter of one end of the yarn feeding device 1 to reduce the twist difference between the inner and outer layers of the core-spun yarn; the second twisting roller 42 adopts a cylindrical structure with a fixed diameter. The first twisting roller 41 and the second twisting roller 42 are all dust cage structures, and the dust cage adopts a roller whose surface is covered with mesh and has a suction device inside. The fan is connected to form a negative pressure; the twisting roller is provided with a non-porous section near the end of the yarn receiving device 5, which matches the width of the non-porous mesh curtain 31, so as to improve the surface smoothness of the core-spun yarn. In this embodiment, the core yarn 8 is made of conductive heating fiber filaments, and the conductive heating fiber is a composite fiber 9 containing electrothermal material components, and the conductive fiber is energized to generate heat to achieve the effect of keeping warm.

The receiving device 3 includes a net curtain 31 and a non-porous curtain 32, the non-porous curtain 32 is connected with the net curtain 31, the net curtain 31 and the non-porous curtain 32 are set in a circular rotation, the net curtain 31 is set in a loop to form a cavity, and the second twisting roller 42 is arranged at one end of the cavity, and the other end of the cavity is provided with a rotating roller, and the net curtain 31 is driven to rotate by the rotation of the second twisting roller 42 and the rotating roller. A suction pipe 7 is arranged in the cavity, and the end of the suction pipe 7 is arranged below the net curtain 31 .

Also comprise spinneret 2 and fiber 9, as shown in Figure 2 is the structural representation of spinneret 2, is divided into A zone 21 and B zone 22 on the spinneret 2, is provided with nozzle on A zone 21 and B zone 22 Spinnerets 23, the spinneret 2 is provided with a plurality of spinnerets 23, the spinnerets 23 are evenly arranged on the spinneret 2, and the number of spinnerets 23 on the A zone 21 is higher than that on the B zone 22. The quantity of thread mouth 23 is many, and diameter is little. The spinneret 23 is arranged above the net curtain 31, and the fiber 9 is placed on the net curtain 31 through the spinneret 23. The second twisting roller 42 is arranged at the end of the net curtain 31, and the fiber 9 passes through the second twisting roller 42. Wrapped on the core yarn 8 to form a wrapped structural yarn, a yarn guide rod 61 is provided between the twisting device 4 and the winding device 5, the winding device 5 includes a bobbin 52, and the wrapped structured yarn is fixed by the yarn guide rod 61 On the bobbin 52.

Fiber 9 is a blend of polybutylene terephthalate (PBT) and polyethylene terephthalate (PET) melt-blown spun fibers, which are passed through the fibers in the spinneret 23 of the A zone 21 9 adopt 70 percent polybutylene terephthalate and 30 percent polyethylene terephthalate, and the fiber 9 that passes through the spinneret 23 in the B zone 22 adopts 100 percent Thirty percent polybutylene terephthalate and seventy percent polyethylene terephthalate. As shown in Figure 3, it is a schematic structural view of the multi-layer micro-nano fiber core-spun yarn. The core yarn 8 follows the twisting device 4 from the end close to the yarn feeding device 1 to the winding device 5. During this process, the core yarn 8 is sequentially The fibers 9 in the upper B zone 22 are wound to form the first fiber layer, and then the fibers 9 in the upper A zone 21 are wound to form the second fiber layer.

As shown in Figure 5, it is a process flow chart of multi-layer micro-nano fiber core-spun yarn and its spinning method, including the following steps: Step 1. prepares, the blended fibers of A zone 21 and B zone 22, according to polyparaphenylene After mixing the ratio of butylene dicarboxylate slices and polyethylene terephthalate slices, the mixed fiber 9 slices are dried, processed by a screw machine, and then the melt is extruded and measured The pump enters the spinneret assembly for melt blown spinning to form two blended fibers respectively. Then the core yarn 8 is installed on the yarn core 11;

Step 2. Start the device, and the unwinding roller 12 rotates to pull the core yarn 8 from the yarn core 11, and pull it into the first twisting roller 41 and the second twisting roller 42 through the yarn guide rod 61;

Step 3. The melt-blown spinneret 2 sprays the blended micro-nano fiber 9 onto the net curtain 31, as shown in Figure 1, falls vertically on the net curtain 31, and there is a suction pipe 7 under the net curtain 31 on the net curtain Negative pressure is formed on the surface of 31 to guide the blended micro-nano fibers, the second twisting roller 42 rotates counterclockwise, and the net curtain 31 begins to move circularly along the direction of the arrow on the net curtain 31 in Figure 1, moving the blended fiber 9 to the first The wedge-shaped working area between the twisting roller 41 and the second twisting roller 42, because the first twisting roller 41 and the second twisting roller 42 are all dust cage structures, the dust cage structure is equipped with a suction device, and the air suction One end of the device is connected to the fan through the air duct to form a negative pressure to form an adsorption effect on the 9 layers of micro-nano fibers, and the core yarn 8 is frictionally added to the core yarn 8 through the reverse movement of the first twisting roller 41 and the second twisting roller 42 at the tangent. Twisting, the micro-nano fiber layer is wrapped and wound on the core yarn 8 to form a micro-nano fiber 9 core-spun yarn 8; the diameter of the first twisting roller 41 near the end of the winding device 5 is greater than the diameter of the twisting roller near the end of the yarn feeding device 1 , reduce the difference in the twist of the core-spun yarn 8 inside and outside; at the output end of the first twisting roller 41, the second twisting roller 42, be provided with a non-porous section, and one side of its length and net curtain 31 is provided with a non-porous curtain 32 width matching, the core-spun yarn 8 is wrapped and twisted by the net curtain 31 and then rubbed and twisted by the non-porous curtain 32, the hairiness on the yarn surface can be effectively controlled, and the roundness and smoothness of the yarn surface can be improved.

Step 4. The blended fiber 9 wraps the core yarn to form a wrapping structural yarn, which is drawn to the package yarn 52 by the yarn guide rod 61 , and wound into the package yarn 52 by the winding roller 51 .

Two different raw materials are used in different melt-blown spinning dies to form two kinds of micro-nano fibers 9 gathered on the mesh curtain 31, and the micro-nano fibers 9 enter the two twisting rolls for friction and twisting as the twisting rolls rotate. area; the twisting roller is a dust cage structure, and there is a suction device inside the dust cage. In the wedge-shaped groove between the cages, the two dust cages move towards each other, and the 9 layers of micro-nano fibers rotate to cover the core yarn 8 through the principle of friction and twisting to form a multi-layered micro-nano fiber 9-covered yarn.

The core yarn 8 passes through the wedge-shaped groove between the two dust cages along the axial direction of the dust cage. The micro-nano fiber 9 near the feeding end of the core yarn 8 forms the inner layer of the core-spun yarn, and the micro-nano fiber near the output end forms the core. yarn surface. Because the yarn diameter is small and the twisting time is long when the micro-nano fiber in the inner layer starts to twist, the yarn diameter is large and the twisting time is short when the micro-nano fiber in the outer layer starts to twist, resulting in a tight inner layer and a fluffy outer layer. In the present invention, a dust cage adopts a design with a small diameter at the input end and a large diameter at the output end, which can effectively reduce the difference in density between the inner and outer layers. Moreover, near the output end, the dust cage and the net curtain 31 adopt a section of non-porous design, which can improve the surface smoothness of the micro-nano fiber 9 core-spun yarn.

In this embodiment, the core yarn 8 adopts conductive heating fiber filaments, and the covering fibers 9 use PBT/PET 70%/30% and PET/PBT 30%/70% respectively as raw materials, and adopt different spinnerets. Form two kinds of micro-nano fibers with different components, different fineness, different thickness, and different bulkiness, and apply friction twisting technology to form a unique multi-layer spiral wrapping structure micro-nano fiber core-spun yarn. The nanometer multilayer structure increases the thermal resistance, which is beneficial to keep the heat of the core yarn 8 . At the same time, the micro-nano fiber 9 of the covering layer is soft and comfortable to the touch, and also has antibacterial and breathable functions. Therefore, this multi-layer micro-nano fiber core-spun yarn has multiple functions such as heat preservation, antibacterial, and breathable, soft and comfortable, and can be widely used in the production of various woven and knitted textile fabrics to meet the development needs of new textile products. The present invention adopts the basic principle of friction spinning and twisting, and combines it with melt-blown spinning technology, and evenly coats the micro-nano fibers formed by melt-blown spinning on the surface of the core filament to form a new type of multi-layer structure micro-nano fiber package. core yarn.

The above is the preferred embodiment of the present invention. For those skilled in the art, some modifications and improvements can be made without departing from the principle of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims (10)

1. A core-spun yarn spinning device with a micro-nanofiber multilayer structure, characterized in that: it includes a yarn feeding device (1), a twisting device (4), a receiving device (3) and a winding device (5). The yarn feeding device (1) includes a yarn core (11), a core yarn (8) is provided on the yarn core (11), and a guide is provided between the yarn feeding device (1) and the twisting device (4). yarn rod (61), the twisting device (4) is composed of a first twisting roller (41) and a second twisting roller (42), and the core yarn (8) is introduced into the first Between the first twisting roller (41) and the second twisting roller (42), the receiving device (3) includes a mesh curtain (31), and also includes a spinneret (2) and fibers (9). The silk board (2) is divided into A zone (21) and B zone (22), and the A zone (21) and B zone (22) are provided with a spinneret (23), and the spinneret (23 ) is arranged above the mesh curtain (31), the second twisting roller (42) is arranged at the end of the mesh curtain (31), and the fiber (9) is wrapped in the core by the second twisting roller (42) A wrapped structural yarn is formed on the yarn (8), and a yarn guide rod (62) is provided between the twisting device (4) and the winding device (5), and the winding device (5) includes a bobbin yarn (52 ), the wrapped structural yarn is wound onto the bobbin (52) through the yarn guide rod (61). 2. The micro-nanofiber multi-layer structure core-spun yarn spinning device according to claim 1, characterized in that: the yarn feeding device (1) is provided with a spinning roller (12), and the spinning roller ( 12) Connected to the yarn core (11), the core yarn (8) is connected to the yarn guide rod (61) through the yarn withdrawal roller (12). 3. The micro-nano fiber multi-layer structure core-spun yarn spinning device according to claim 1, characterized in that: the first twisting roller (41) adopts a structure with a variable diameter, and the inclination angle is set at 3- Between 15°, the diameter of the end of the first twisting roller (41) close to the winding device (5) is greater than the diameter of the end of the first twisting roller (41) close to the yarn feeding device (1), and the diameter of the second twisting roller (41) is close to the end of the yarn feeding device (1). The twisting roller (42) adopts a cylindrical structure with a fixed diameter. The first twisting roller (41) and the second twisting roller (42) are both dust cage structures, and there is a non-porous section near the output end. A suction device is installed inside the cage, and one end of the suction device is connected to the fan through an air duct. 4. The micro-nanofiber multi-layer structure core-spun yarn spinning device according to claim 1, characterized in that: the spinneret (2) is provided with a plurality of spinneret openings (23), and the spinneret The nozzles (23) are evenly arranged on the spinneret (2), and the number of nozzles (23) on the A zone (21) is more than the number of the nozzles (23) on the B zone (22), so The diameter of the spinneret (23) on the A zone (21) is smaller than the diameter of the spinneret (23) on the B zone (22). 5. The micro-nanofiber multilayer structure core-spun yarn spinning device according to claim 1, characterized in that: the receiving device (3) also includes a non-porous curtain (32), and the non-porous curtain (32) Connected with the net curtain (31), the net curtain (31) and the non-porous curtain (32) are arranged in a circular rotation, and the annular arrangement of the net curtain (31) forms a cavity, and the second twisting roller (42 ) is arranged at one end of the cavity, and the other end of the cavity is provided with a rotating roller, and the mesh curtain (31) is rotated by the rotation of the second twisting roller (42) and the rotating roller. 6. The micro-nano fiber multi-layer structure core-spun yarn spinning device according to claim 5, characterized in that: a suction pipe (7) is provided in the cavity, and the end of the suction pipe (7) Set below the net curtain (31). 7. The micro-nano fiber multi-layer structure core-spun yarn spinning device according to claim 1, characterized in that: the fiber (9) is made of polybutylene terephthalate (PBT) and polyterephthalate Ethylene glycol formate (PET), the fiber (9) passing through the spinneret (23) in the A zone (21) adopts 70% polybutylene terephthalate and 3% 10% polyethylene terephthalate, the fiber (9) passing through the spinneret (23) in the B zone (22) adopts 30% polybutylene terephthalate and 100% 70/70 polyethylene terephthalate, the core yarn (8) is a conductive heating fiber filament. 8. A production process of the micro-nano fiber multilayer structure core-spun yarn spinning device according to claim 1, characterized in that: comprising the following steps: Step 1. Make preparations, blend polybutylene terephthalate slices and polyethylene terephthalate slices according to the proportion of melt-blown spinning, and install the core yarn (8); Step 2. Start the melt-blown spinning device, start the spinning device, and the unwinding roller (12) rotates to pull the core yarn (8) from the yarn core (11) and pull it to the first In the middle of a twisting roller (41) and the second twisting roller (42); Step 3. The spinneret (2) sprays the blended fiber (9) onto the net curtain (31), and the suction pipe (7) under the net curtain (31) is connected to the fan to form a negative air flow on the net curtain (31). Pressing and accumulating fibers (9), the second twisting roll (42) rotates, and the mesh curtain (31) starts to circulate, and the blended fiber (9) is moved to the first twisting roll (41) and the second twisting roll ( 42), through the rotation of the first twisting roller (41) and the second twisting roller (42) to wind on the core yarn (8); Step 4. The blended fiber (9) wraps the core yarn (8) to form a wrapping structural yarn, which is pulled to the package yarn (52) by the yarn guide rod (61), and the package yarn (52) is driven by the winding roller (51) ) to wind up the wrapped structure yarn. 9. The production process of the micro-nanofiber multi-layer structure core-spun yarn spinning device according to claim 8, characterized in that: in step 1, the blended fibers of A zone (21) and B zone (22) ( 9), by mixing polybutylene terephthalate and polyethylene terephthalate according to the proportion - drying - screw machine - melt extrusion - metering pump - spinning Components - into a net. 10. The production process of the micro-nanofiber multilayer structure core-spun yarn spinning device according to claim 8, characterized in that: in step 3, the first twisting roller (41) and the second twisting roller (42) are all dust cage structures, one end is connected to the fan through the air duct to form a negative pressure, the first twisting roller (41) and the second twisting roller (42) rotate in the same direction, and at the point where the two twisting rollers are tangent The direction of movement is opposite.