CN110409031B

CN110409031B - Micro-nanofiber multilayer structure covering yarn spinning device and production process thereof

Info

Publication number: CN110409031B
Application number: CN201910783235.5A
Authority: CN
Inventors: 刘梅城; 洪杰; 陈和春; 尹桂波; 穆征
Original assignee: Nantong Textile Vocational Technology College
Current assignee: Nantong Textile Vocational Technology College
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2021-08-06
Anticipated expiration: 2039-08-23
Also published as: CN110409031A

Abstract

The invention discloses a micro-nanofiber multilayer structure covering yarn spinning device and a production process thereof, and the micro-nanofiber multilayer structure covering yarn spinning device comprises a yarn feeding device, a twisting device, a receiving device and a winding device, wherein the yarn feeding device comprises a yarn core, core yarns are arranged on the yarn core, the twisting device is composed of a first twisting roller and a second twisting roller, the core yarns are guided into the space between the first twisting roller and the second twisting roller through a yarn guide rod, the micro-nanofiber layer is covered to form covering yarns, the winding device comprises barrel yarns and a winding roller, the covering yarns pass through the yarn guide rod, and the winding roller drives the barrel yarns to wind the covering yarns. The core yarn adopts the conductive heating fiber filament, the cladding fiber adopts two raw materials of PBT slice and PET slice to be mixed according to different proportions, so as to form the micro-nano fiber with two components, different fineness, different thickness and different filling power, and the micro-nano fiber core-spun yarn with multiple functions of conductive heating, heat preservation, bacteriostasis, ventilation and the like is formed, is soft and comfortable, can be widely applied to the production of various textile fabrics, and meets the requirements of textile product development.

Description

Micro-nanofiber multilayer structure covering yarn spinning device and production process thereof

Technical Field

The invention relates to the technical field of spinning, in particular to a micro-nanofiber multilayer structure covering yarn spinning device and a production process thereof.

Background

The core spun yarn is also called a composite yarn or a covering yarn, and is a yarn formed by combining two or more fibers. The core-spun yarn is mainly composed of a core yarn and a coating layer, and is generally spun by using a synthetic fiber filament with good strength and elasticity as a core yarn and wrapping short fibers such as cotton, wool, chemical fiber and the like by twisting together. Therefore, the core-spun yarn has the excellent performance of both filament core yarn and outer covering short fiber. The spinning method of the core-spun yarn mainly comprises ring spinning and friction spinning, and also adopts air jet spinning to produce the core-spun yarn.

The electric heating fiber is a composite fiber containing electric heating material components, and the principle is that the electric heating fiber is electrified to generate heat to achieve the effect of keeping warm. At present, the conductive heating fiber which is widely applied is the main carbon fiber, and the carbon fiber material has the functions of rapid temperature rise and high electric heat conversion rate and generating far infrared rays during heating, so that the heating warm-keeping clothes with health care function can be developed by utilizing the carbon fiber heating material. In recent years, with the development of graphene technology, various graphene heating products are popular in the market, and heat is generated by electric heating, that is, by using an external power supply, current flows through the resistance of the graphene composite material. No matter the carbon fiber or the graphene fiber is, the color of the fiber is black or gray black along with the content of carbon elements, and the base material of the fiber is mainly nylon or terylene, so the application range is severely limited.

The melt-blown spinning method is a spinning method which makes the just extruded high polymer melt rapidly drawn, solidified and formed at high power by means of high-speed hot air flow, and can produce fibers with the diameter of 1-50 mu m or even less than 1 mu m. The melt-blown spinning is mainly used for non-woven fabrics because the fibers formed by melt-blown spinning are fine, low in strength, low in fiber orientation degree and easy to adhere, and has the advantages of short technological process and capability of being directly made into non-woven fabrics by spinning.

Disclosure of Invention

The invention aims to provide a spinning device and a production process of a core-spun yarn with a micro-nanofiber multilayer structure.

In order to realize the purpose of the invention, the invention adopts the following technical scheme: a micro-nanofiber multilayer structure covering yarn spinning device comprises a yarn feeding device, a twisting device, a receiving device and a winding device, wherein the yarn feeding device comprises a yarn core, core yarns are arranged on the yarn core, a yarn guide rod is arranged between the yarn feeding device and the twisting device, the twisting device is composed of a first twisting roller and a second twisting roller, the core yarns are guided into the position between the first twisting roller and the second twisting roller through the yarn guide rod, the receiving device comprises a screen curtain, a spinneret plate and fibers, the spinneret plate is divided into an area A and an area B, spinneret orifices are arranged on the area A and the area B, the spinneret orifices are arranged above the screen curtain, the second twisting roller is arranged at the end part of the screen curtain, the micro-nanofiber is wrapped on the core yarns through the second twisting roller to form wrapping structure yarns, the yarn guide rod is arranged between the twisting device and the winding device, and the winding device comprises cone yarns, the wrapping structure yarn is wound on the cone yarn through the yarn guide rod.

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

Preferably, the first twisting roller adopts a structure with a diameter changed, the inclination angle is set between 3 degrees and 15 degrees, the diameter of one end, close to the winding device, of the first twisting roller is larger than the diameter of one end, close to the yarn feeding device, of the twisting roller, the diameter of the second twisting roller adopts a cylindrical structure with a fixed diameter, the first twisting roller and the second twisting roller are both of a dust cage structure, a section of non-porous section is arranged close to the output end, an air suction device is arranged inside the dust cage, and one end of the air suction device is connected with the fan through an air pipe.

Preferably, a plurality of spinning nozzles are arranged on the spinneret plate, the spinning nozzles are uniformly distributed on the spinneret plate, the number of the spinning nozzles in the area A is larger than that of the spinning nozzles in the area B, and the diameter of the spinning nozzles in the area A is smaller than that of the spinning nozzles in the area B.

Preferably, the receiving device further comprises a nonporous curtain, the nonporous curtain is connected with the net curtain, the net curtain and the nonporous curtain are circularly and rotatably arranged, the ring of the net curtain is arranged to form a cavity, the second twisting roller is arranged at one end of the cavity, the other end of the cavity is provided with the rotating roller, and the net curtain rotates through the rotation of the second twisting roller and the rotating roller.

Preferably, an air suction pipe is arranged in the cavity, and the end part of the air suction pipe is arranged below the net curtain.

Preferably, the fibers are made of polybutylene terephthalate (PBT) and polyethylene terephthalate (PET), the fibers penetrating through the spinneret in the area A are made of seventy percent of polybutylene terephthalate and thirty percent of polyethylene terephthalate, the fibers penetrating through the spinneret in the area B are made of thirty percent of polybutylene terephthalate and seventy percent of polyethylene terephthalate, and the core yarn is a conductive heating fiber filament.

A production process of a micro-nanofiber multilayer structure covering yarn spinning device comprises the following steps:

step 1, preparing, namely blending polybutylene terephthalate slices and polyethylene terephthalate slices according to a proportion, melt-blowing and spinning, and mounting core yarns;

step 2, starting the melt-blown spinning device, starting the spinning device, rotating a yarn withdrawing roller, drawing core yarn from a yarn core, and drawing the core yarn to the middle of a first twisting roller and a second twisting roller through a yarn guide rod;

step 3, spraying the blended fibers onto a net curtain by a spinneret plate, connecting an air suction pipe below the net curtain with a fan, forming negative pressure concentrated fibers on the net curtain, rotating a second twisting roller, starting the circular movement of the net curtain, moving the blended fibers between a first twisting roller and the second twisting roller, and winding the blended fibers on core yarns through the rotation of the first twisting roller and the second twisting roller;

and 4, wrapping the core yarn with the blended fiber to form wrapping structure yarn, drawing the wrapping structure yarn onto the cone yarn through a yarn guide rod, and driving the cone yarn to wind the wrapping structure yarn through a winding roller.

Preferably, in step 1, the blended fibers in the zones A and B are formed into a net by mixing, drying, screw machine, melt extrusion, metering pump, spinning assembly and polyethylene terephthalate according to the proportion respectively.

Preferably, in step 3, the first twisting roller and the second twisting roller are both of a dust cage structure, one end of the first twisting roller is connected with the fan through an air pipe to form negative pressure, the rotating directions of the first twisting roller and the second twisting roller are the same, and the moving directions of the first twisting roller and the second twisting roller are opposite at the tangent position of the two twisting rollers.

Compared with the prior art, the micro-nanofiber multilayer structure core-spun yarn spinning device and the production process thereof adopting the technical scheme have the following beneficial effects: by adopting the micro-nano fiber multilayer structure covering yarn spinning device and the production process thereof, two different raw materials are sprayed by different melt-blown spinning die heads to form two kinds of micro-nano fibers to be gathered on the net curtain, and then the micro-nano fiber layer is rotated to cover the core yarn by a friction twisting principle to form the multilayer micro-nano fiber covering yarn.

Drawings

FIG. 1 is a schematic structural diagram of a micro-nanofiber multilayer structure core-spun yarn spinning device according to an embodiment of the invention;

FIG. 2 is a schematic structural view of a spinneret plate in this embodiment;

FIG. 3 is a schematic structural view of a wrap-structured yarn in this example;

FIG. 4 is a schematic structural view of a first twisting roller in the present embodiment;

fig. 5 is a process flow chart of a production process of the micro-nanofiber multilayer structure core-spun yarn spinning device in this embodiment.

Reference numerals: 11. A yarn core; 12. a yarn withdrawing roller; 2. a spinneret plate; 21. a region A; 22. a region B; 23. a spinneret orifice; 31. A net curtain; 32. a nonporous curtain; 41. A first twist roller; 42. a second twist roller; 51. a winding roller; 52. cone yarn; 61. a yarn guide bar; 7. an air suction pipe; 8. a core yarn; 9. a fiber.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1, the structural schematic diagram of a micro-nanofiber multilayer structure core-spun yarn spinning device includes a yarn feeding device, a twisting device, a receiving device and a winding device, the yarn feeding device is composed of a yarn core 11 and a yarn withdrawing roller 12, the yarn withdrawing roller 12 is connected with the yarn core 11, a core yarn 8 is arranged on the yarn core 11, a yarn guide rod 61 is arranged between the yarn feeding device and the twisting device, and the core yarn 8 is connected with the yarn guide rod 61 through the yarn withdrawing roller 12. The twisting device consists of a first twisting roller 41 and a second twisting roller 42, the core yarn 8 is guided between the first twisting roller 41 and the second twisting roller 42 through a yarn guide rod 61, as shown in figure 4, the structure of the twisting rollers is schematic, the first twisting roller 41 adopts a structure with a variable diameter, the beta angle is between 3 and 15 degrees, the diameter of one end of the first twisting roller 41 close to the winding device is larger than that of one end of the first twisting roller 41 close to the yarn feeding device, and the difference of the twist degrees of the inner layer and the outer layer of the core-spun yarn is reduced; the second twisting roller 42 has a cylindrical structure with a fixed diameter. The first twisting roller 41 and the second twisting roller 42 are both of a dust cage structure, the dust cage is a roller with meshes distributed on the surface and an air suction device arranged inside, the air suction device is arranged inside, and the air suction device is connected with a fan through an air pipe to form negative pressure; the twist roller is provided with a section of imperforate section near one end of the winding device to match the width of the imperforate curtain 32 to improve the surface finish of the core spun yarn. In this embodiment, the core yarn 8 is a conductive heating fiber filament, the conductive heating fiber is a composite fiber containing an electrothermal material component, and the conductive fiber is electrified to generate heat, so that a warm-keeping effect is achieved.

The receiving device comprises 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 circularly and rotatably arranged, the net curtain 31 is circularly arranged to form a cavity, a second twisting roller 42 is arranged at one end of the cavity, a rotating roller is arranged at the other end of the cavity, and the net curtain 31 is driven to rotate through the rotation of the second twisting roller 42 and the rotating roller. An air suction pipe 7 is arranged in the cavity, and the end part of the air suction pipe 7 is arranged below the net curtain 31.

The spinneret plate comprises a spinneret plate 2 and fibers 9, as shown in fig. 2, the spinneret plate 2 is structurally schematic, the spinneret plate 2 is divided into an area A21 and an area B22, spinneret orifices 23 are arranged on the area A21 and the area B22, a plurality of spinneret orifices 23 are arranged on the spinneret plate 2, the spinneret orifices 23 are uniformly distributed on the spinneret plate 2, and the number of the spinneret orifices 23 on the area A21 is larger than that of the spinneret orifices 23 on the area B22, and the diameters of the spinneret orifices 23 are smaller. The spinneret 23 is arranged above the screen 31, the fiber 9 is sprayed onto the screen 31 through the spinneret 23, the second twisting roller 42 is arranged at the end part of the screen 31, the fiber 9 is wrapped on the core yarn 8 through the second twisting roller 42 to form wrapping structure yarn, a yarn guide rod 61 is arranged between the twisting device and the winding device, the winding device comprises a cone yarn 52, and the wrapping structure yarn is fixed on the cone yarn 52 through the yarn guide rod 61.

The fibers 9 are meltblown fibers of polybutylene terephthalate (PBT) and polyethylene terephthalate (PET), the fibers 9 passing through the spinneret 23 in the a-zone 21 are seventy percent polybutylene terephthalate and thirty percent polyethylene terephthalate, and the fibers 9 passing through the spinneret 23 in the B-zone 22 are thirty percent polybutylene terephthalate and seventy percent polyethylene terephthalate. As shown in fig. 3, which is a schematic structural diagram of a multi-layer micro-nanofiber core-spun yarn, a core yarn 8 is wound with fibers 9 in a B region 22 in sequence from one end close to a yarn feeding device to a winding device in the process to form a first fiber layer, and then wound with fibers 9 in an a region 21 to form a second fiber layer.

As shown in fig. 5, a process flow diagram of a multilayer micro-nanofiber core-spun yarn and a spinning method thereof is provided, which comprises the following steps: step 1, preparation is carried out, the blended fibers in the area A21 and the area B22 are mixed according to the proportion of polybutylene terephthalate slices and polyethylene terephthalate slices, the mixed fiber 9 slices are dried, processed by a screw machine, extruded, and fed into a spinning assembly through a metering pump for melt-blown spinning, and two types of blended fibers are respectively formed. Then the core yarn 8 is arranged on the yarn core 11;

step 2, starting the device, rotating the yarn withdrawing roller 12, drawing the core yarn 8 from the yarn core 11, and drawing the core yarn into the first twisting roller 41 and the second twisting roller 42 through the yarn guide rod 61;

step 3, the melt-blown spinneret plate 2 sprays the blended micro-nanofibers 9 onto the net curtain 31, the blended micro-nanofibers are vertically dropped on the net curtain 31 as shown in fig. 1, a suction pipe 7 is arranged below the net curtain 31 to form negative pressure on the surface of the net curtain 31 to guide the blended micro-nanofibers, the second twisting roller 42 rotates anticlockwise, the net curtain 31 starts to circularly move along the arrow direction on the net curtain 31 in fig. 1, the blended fibers 9 are moved to a wedge-shaped working area between the first twisting roller 41 and the second twisting roller 42, because the first twisting roller 41 and the second twisting roller 42 are both of a dust cage structure, the dust cage structure is provided with an air suction device, one end of the air suction device is connected with a fan through an air pipe to form negative pressure to form adsorption action on the micro-nano fiber 9 layer, the core yarn 8 is subjected to friction twisting through the reverse motion of the first twisting roller 41 and the second twisting roller 42 at the tangent position, and the micro-nanofiber layer is wrapped and wound on the core yarn 8 to form a micro-nanofiber 9 covering yarn 8; the diameter of one end of the first twisting roller 41 close to the winding device is larger than that of one end of the twisting roller close to the yarn feeding device, so that the difference of the twist of the inner layer and the twist of the outer layer of the core-spun yarn 8 is reduced; the output ends of the first twisting roller 41 and the second twisting roller 42 are provided with non-porous sections, the length of the non-porous sections is matched with the width of the non-porous curtain 32 arranged on one side of the net curtain 31, the core-spun yarn 8 is twisted by rubbing through the non-porous curtain 32 after being wrapped and twisted through the net curtain 31, hairiness on the surface of the yarn can be effectively controlled, and the round and smooth finish of the surface of the yarn is improved.

And 4, winding the core yarn by the blend fiber 9 to form a winding structure yarn, drawing the winding structure yarn onto the bobbin yarn 52 through a yarn guide rod 61, and winding the bobbin yarn 52 through a winding roller 51.

Adopting different melt-blown spinning die heads for two different raw materials to form two micro-nano fibers 9 which are gathered on the net curtain 31, and enabling the micro-nano fibers 9 to enter two twisting roller friction twisting areas along with the rotation of the twisting rollers; the twisting roller is of a dust cage structure, an air suction device is arranged inside the dust cage, the micro-nano fibers 9 are condensed on the surface of the dust cage under the action of the air suction device, the micro-nano fibers 9 are transferred to a wedge-shaped groove between two dust cages along with the rotation of the dust cage, the two dust cages move in opposite directions, and the micro-nano fibers 9 rotate the cladding core yarns 8 to form multilayer micro-nano fiber 9 cladding yarns according to the friction twisting principle.

The core yarn 8 passes through the wedge-shaped groove between the two dust cages along the axis direction of the dust cages, the micro-nanofibers 9 close to the feeding end of the core yarn 8 form the inner layer of the core-spun yarn, and the micro-nanofibers close to the output end form the surface layer of the core-spun yarn. The inner layer is compact and the outer layer is fluffy due to the fact that the diameter of the yarn is small and the twisting time is long when the inner layer micro-nano fiber starts to twist, and the diameter of the yarn is large and the twisting time is short when the outer layer micro-nano fiber starts to twist. According to the invention, one dust cage adopts a design that the diameter of the input end is small and the diameter of the output end is large, so that the difference of the densities of the inner layer and the outer layer can be effectively reduced. And, near the output end, the dust cage and the net curtain 31 adopt a section of non-porous design, so that the surface finish of the micro-nanofiber 9 core-spun yarn can be improved.

In this embodiment, the core yarn 8 adopts the conductive heating fiber filament, the cladding fiber 9 uses PBT/PET 70%/30%, PET/PBT 30%/70% as raw materials respectively, adopt different spinning die heads, form two kinds of component difference, the fineness is different, the thickness is different, the micro-nanofiber that fluffy degree is different, use friction twisting technique, form unique multilayer spiral wrap structure micro-nanofiber covering yarn, this kind of micro-nano multilayer structure of cladding has increased the thermal resistance, be favorable to keeping the heat of core yarn 8. Meanwhile, the micro-nano fibers 9 of the coating layer are soft and comfortable in hand feeling and have the functions of bacteriostasis and ventilation. Therefore, the multilayer micro-nanofiber core-spun yarn has multiple functions of heat preservation, bacteriostasis, ventilation and the like, is soft and comfortable, can be widely applied to the production of various woven and knitted textile fabrics, and meets the development requirements of novel textile products. The invention adopts the basic principle of friction spinning twisting and combines with the melt-blown spinning technology, and micro-nano fibers formed by melt-blown spinning are uniformly coated on the surface of a core yarn, so as to form the novel multilayer structure micro-nano fiber covering yarn.

The foregoing is a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims

1. The utility model provides a micro-nanofiber multilayer structure covering yarn spinning device which characterized in that: including yarn feeding device, twisting device, receiving arrangement and take-up device, yarn feeding device includes yarn core (11), be equipped with core yarn (8) on yarn core (11), be equipped with yarn guide rod (61) between yarn feeding device and the twisting device, twisting device comprises first twisting roller (41) and second twisting roller (42), core yarn (8) are through leading between yarn guide rod (61) leading-in first twisting roller (41) and second twisting roller (42), receiving arrangement includes screen (31), still includes spinneret (2) and fibre (9), divide into A district (21) and B district (22) on spinneret (2), be equipped with spinneret (23) on A district (21) and B district (22), spinneret (23) set up in screen (31) top, second twisting roller (42) set up the tip at screen (31), fibre (9) are wrapped up on core yarn structure (8) through second twisting roller (42) and are formed a package yarn package A yarn guide rod (61) is arranged between the twisting device and the winding device, the winding device comprises a cone yarn (52), and the wrapping structure yarn is wound on the cone yarn (52) through the yarn guide rod (61);

a plurality of spinning nozzles (23) are arranged on the spinneret plate (2), the spinning nozzles (23) are uniformly distributed on the spinneret plate (2), the number of the spinning nozzles (23) on the area A (21) is more than that of the spinning nozzles (23) on the area B (22), and the diameter of the spinning nozzles (23) on the area A (21) is smaller than that of the spinning nozzles (23) on the area B (22);

the fiber (9) is composed of polybutylene terephthalate (PBT) and polyethylene terephthalate (PET), the fiber (9) penetrating through the spinneret (23) in the area A (21) adopts seventy percent of polybutylene terephthalate and thirty percent of polyethylene terephthalate, the fiber (9) penetrating through the spinneret (23) in the area B (22) adopts thirty percent of polybutylene terephthalate and seventy percent of polyethylene terephthalate, and the core yarn (8) is a conductive heating fiber filament.

2. The micro-nanofiber multilayer structure core-spun yarn spinning device according to claim 1, wherein: the yarn feeding device is provided with a yarn withdrawing roller (12), the yarn withdrawing roller (12) is connected with a yarn core (11), and the core yarn (8) is connected with a yarn guide rod (61) through the yarn withdrawing roller (12).

3. The micro-nanofiber multilayer structure core-spun yarn spinning device according to claim 1, wherein: first roller (41) of twisting with fingers adopts the structure that the diameter changes, and the angle of inclination sets up between 3-15, the diameter that first roller (41) of twisting with fingers is close to take-up device one end is greater than first roller (41) of twisting with fingers and is close to the diameter of fournisseur one end, second roller (42) of twisting with fingers adopts the fixed drum structure of diameter, first roller (41) of twisting with fingers and fingers (42) of second are the dust cage structure, are being equipped with one section non-porous section near the output, and dust cage internally mounted has the device that induced drafts, and the device one end that induced drafts links to each other with the fan through the tuber pipe.

4. The micro-nanofiber multilayer structure core-spun yarn spinning device according to claim 1, wherein: the receiving arrangement still includes sclausura curtain (32), sclausura curtain (32) are connected with net curtain (31), net curtain (31) and sclausura curtain (32) cyclic rotation set up, net curtain (31) loop type sets up and forms the cavity, second twist roller (42) set up the one end at the cavity, the cavity other end is equipped with rotatory roller, net curtain (31) are rotatory through the rotation of second twist roller (42) and rotatory roller.

5. The micro-nanofiber multilayer structure core-spun yarn spinning device according to claim 4, wherein: an air suction pipe (7) is arranged in the cavity, and the end part of the air suction pipe (7) is arranged below the net curtain (31).

6. A production process of a micro-nanofiber multilayer structure core-spun yarn spinning device according to claim 1 is characterized in that: the method comprises the following steps:

step 1, preparing, namely performing blending melt-blown spinning on polybutylene terephthalate slices and polyethylene terephthalate slices according to a ratio, and mounting core yarns (8);

step 2, starting the melt-blown spinning device, starting the spinning device, rotating a yarn withdrawal roller (12), drawing down core yarn (8) from a yarn core (11), and drawing the core yarn to the middle of a first twisting roller (41) and a second twisting roller (42) through a yarn guide rod (61);

step 3, the blended fibers (9) are sprayed onto the net curtain (31) by the spinneret plate (2), the suction pipe (7) below the net curtain (31) is connected with the fan, negative pressure gathered fibers (9) are formed on the net curtain (31), the second twisting roller (42) rotates, the net curtain (31) starts to move circularly, the blended fibers (9) move between the first twisting roller (41) and the second twisting roller (42), and the blended fibers (9) are wound on the core yarns (8) through the rotation of the first twisting roller (41) and the second twisting roller (42);

and 4, wrapping the core yarn (8) by the blended fiber (9) to form wrapping structure yarn, drawing the wrapping structure yarn onto the cone yarn (52) through a yarn guide rod (61), and driving the cone yarn (52) to wind the wrapping structure yarn through a winding roller (51).

7. A production process of a micro-nano fiber multilayer structure core-spun yarn spinning device according to claim 6, characterized in that: in step 1, the blended fibers (9) in the A zone (21) and the B zone (22) are respectively mixed by polybutylene terephthalate and polyethylene terephthalate according to the proportion, dried, screw machine, melt extrusion, metering pump, spinning pack and web formation.

8. A production process of a micro-nano fiber multilayer structure core-spun yarn spinning device according to claim 6, characterized in that: in the step 3, the first twisting roller (41) and the second twisting roller (42) are both of a dust cage structure, one end of the first twisting roller is connected with a fan through an air pipe to form negative pressure, the rotating directions of the first twisting roller (41) and the second twisting roller (42) are the same, and the moving directions of the two twisting rollers at the tangent position are opposite.