CN114232145A - Preparation device and preparation method of micro-nano rotor yarn - Google Patents
Preparation device and preparation method of micro-nano rotor yarn Download PDFInfo
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- CN114232145A CN114232145A CN202111539812.XA CN202111539812A CN114232145A CN 114232145 A CN114232145 A CN 114232145A CN 202111539812 A CN202111539812 A CN 202111539812A CN 114232145 A CN114232145 A CN 114232145A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- 239000000835 fiber Substances 0.000 claims abstract description 128
- 238000010041 electrostatic spinning Methods 0.000 claims abstract description 64
- 238000005345 coagulation Methods 0.000 claims abstract description 42
- 230000015271 coagulation Effects 0.000 claims abstract description 41
- 238000007383 open-end spinning Methods 0.000 claims abstract description 22
- 239000002105 nanoparticle Substances 0.000 claims abstract description 21
- 239000002121 nanofiber Substances 0.000 claims abstract description 15
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 41
- 238000009987 spinning Methods 0.000 claims description 34
- 238000009960 carding Methods 0.000 claims description 14
- 238000005524 ceramic coating Methods 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 description 21
- 230000009471 action Effects 0.000 description 17
- 238000005516 engineering process Methods 0.000 description 7
- 238000009413 insulation Methods 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 238000004804 winding Methods 0.000 description 6
- 239000002114 nanocomposite Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
- D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
- D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor
- D01H4/10—Rotors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/12—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0069—Electro-spinning characterised by the electro-spinning apparatus characterised by the spinning section, e.g. capillary tube, protrusion or pin
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Abstract
The invention relates to a preparation device and a preparation method of micro-nano rotor yarns, wherein the preparation device comprises a rotor spinning device and an electrostatic spinning device; the rotor spinning device comprises a rotor and a fiber conveying channel for conveying micron-sized fibers; insulating coatings are coated on the inner surface and the outer surface of the rotating cup except the coagulation groove; the bottom of the rotating cup is connected with a conductive rotating cup shaft, and the rotating cup shaft is grounded; the spinneret of the electrostatic spinning device is over against the coagulation groove of the rotating cup; the preparation method comprises the following steps: the micron-sized fiber output by the fiber transmission channel and the nano-sized fiber spun by the electrostatic spinning are mixed and twisted in a coagulation groove of the rotor to prepare the micro-nano rotor yarn. The electrostatic spinning device is added in the rotor spinning device, so that the blended yarn of the nano-scale fiber and the micron-scale fiber is realized, the mechanical binding force of the nano-scale fiber is ensured as much as possible, the nano-scale fiber is not easy to fall off, and the excellent orientation degree of the nano-scale fiber is also ensured.
Description
Technical Field
The invention belongs to the technical field of spinning, and relates to a preparation device and a preparation method of micro-nano rotor yarns.
Background
At the present stage, with the increasing requirements of people on functional yarns and the incomparable advantages of the scale effect of the nano-scale fibers compared with the conventional micro-scale fibers, the preparation of the nano-scale fibers with special functions into yarns for subsequent processing becomes a new choice. Among various methods for obtaining the nano-scale fiber, the electrostatic spinning technology is the only method which can directly, continuously and efficiently prepare the polymer nano-scale fiber at present. However, pure nano yarn prepared based on the electrostatic spinning technology has low production efficiency and poor mechanical property, and can not meet the quality and market demand of products. Therefore, the method for producing the micro-nano yarn with the nanometer fiber functionality and the traditional yarn linear performance by combining the electrostatic spinning and the traditional spinning technology is more and more popular. At present, the methods for producing micro-nano yarns based on the electrostatic spinning technology mainly comprise two methods: firstly, the electrostatic spinning nano-grade fiber is combined with filament (bundle) and spun yarn in a wrapping winding and twisting mode to form the micro-nano covering yarn, the yarn forming speed is low and is about below 20m/min in order to ensure the content of the nano-grade fiber, and the nano-grade fiber coated outside is easy to fall off due to poor mechanical property, so that the functionality of the micro-nano covering yarn is influenced; secondly, the electrostatic spinning nano-scale fiber is compounded with the short fiber net in the carding process, and then the micro-nano composite yarn is spun through the subsequent traditional spinning process, because the nano-scale fiber is easy to generate mechanical damage in the subsequent spinning process, and meanwhile, the nano-scale fiber content in the micro-nano composite yarn is low and is about 2.0 wt% or less, the functionality of the micro-nano composite yarn is insufficient.
Therefore, a spinning method of micro-nano yarn with high yarn forming speed, high nano-fiber content and stable structure is needed.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a device and a method for preparing micro-nano rotor yarns.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a preparation device of micro-nano rotor yarns comprises a rotor spinning device and an electrostatic spinning device; the rotor spinning device comprises a rotor and a fiber conveying channel for conveying micron-sized fibers; the rotating cup is made of metal, and the inner surface and the outer surface of the rotating cup except the coagulation tank are coated with insulating coatings; the bottom of the rotor is connected with a conductive rotor shaft, and the rotor shaft is grounded, so that the coagulation tank without insulation treatment becomes a receiving unit of electrostatic spinning finished yarn in the spinning device; the spinneret of the electrostatic spinning device is opposite to the coagulation groove of the rotating cup.
As a preferred technical scheme:
according to the preparation device of the micro-nano rotor yarn, the angle formed between the direction of the needle head of the spinning nozzle of the electrostatic spinning device and the central line of the fiber conveying channel is 5-175 degrees, and the minimum distance from the outlet of the spinning nozzle to the coagulation tank (namely the length of the connecting line between the intersection point of the central axis of the spinning nozzle and the coagulation tank and the outlet of the spinning nozzle) is 3-6 cm.
According to the device for preparing the micro-nano rotor yarn, the spinneret of the electrostatic spinning device is a needle spinneret.
According to the device for preparing the micro-nano rotor yarn, the spinneret of the electrostatic spinning device is a single needle, parallel needles, a plurality of needles or coaxial needles;
when the spinneret is a multi-needle spinneret, all the needle outlets are positioned on the same horizontal plane, the angles of all the needles and the horizontal plane are the same, and the minimum distances from all the needle outlets to the coagulation tank (namely the length of a connecting line between the intersection point of the axis of each needle and the coagulation tank and the needle outlets) are the same.
According to the device for preparing the micro-nano rotor yarns, the inner surface and the outer surface of the rotor are coated with the insulating coatings; all the insulating coatings are insulating ceramic coatings.
According to the preparation device of the micro-nano rotor yarn, the thickness of the insulating ceramic coating is uniform and is 0.2-0.5 mm.
The invention also provides a method for preparing the micro-nano rotor yarn by adopting the device, wherein the micro-scale fibers output by the fiber transmission channel and the nano-scale fibers spun by electrostatic spinning are mixed and twisted in a coagulation groove of the rotor to prepare the micro-nano rotor yarn.
As a preferred technical scheme:
the method comprises the following specific processes: the sliver fed by the feeding roller is carded into single fibers, namely micron-sized fibers, by a carding roller rotating at a high speed; then the micron-sized fibers are condensed to a condensing groove of the revolving cup under the action of negative pressure airflow and centrifugal force of high-speed rotation of the revolving cup through a fiber conveying channel, meanwhile, the condensing groove which is not subjected to insulation treatment is used as a receiving unit of the electrostatic spinning device to collect the nano-sized fibers sprayed out by a spinning nozzle of the electrostatic spinning device, and the nano-sized fibers are uniformly attached to the micron-sized fibers in the condensing groove along with the high-speed rotation of the revolving cup, so that the mixing of the nano-sized fibers and the micron-sized fibers is realized; and then the mixed micro-nano fiber strips are further twisted under the high-speed rotation action of the rotor to prepare micro-nano rotor yarns.
According to the method, the diameter of the rotating cup is 32-66 mm, the rotating speed of the rotating cup is 25000-120000 r/min, the rotating speed of the carding roller is 4000-10000 r/min, the negative pressure of the outlet of the rotating cup is-2000-9000 Pa, the input power voltage in the electrostatic spinning device is 220V or 380V, and the output power voltage is 8-50 kV; the volume of an injector connected with a spinning nozzle is 5-100 mL, and the injection speed of spinning solution in the injector is 1.0-300.0 mu L/min.
According to the method, the yarn fineness of the micro-nano rotor yarn is 10-100 tex, the yarn twist is 50-150 twists/10 cm, the yarn forming speed is 20-150 m/min, the mass content of nano-fibers in the micro-nano rotor yarn is 2.0-7.0 wt%, and meanwhile, the structure of the micro-nano rotor yarn is the same as that of a common rotor yarn, so that the micro-nano rotor yarn is stable in structure and is not easy to untwist.
The invention principle is as follows:
the invention effectively combines the electrostatic spinning technology with the traditional rotor spinning technology, and prepares the nano-scale fiber by adding an electrostatic spinning device in the rotor spinning process, and leads the nano-scale fiber and the conventional micron-scale fiber to be mixed in a coagulation tank, and then the yarn is spun by the subsequent twisting and yarn guiding processes. Wherein, the spinneret of the electrostatic spinning device is over against the coagulation tank, in order to guarantee the effective collection of the nanometer fiber in the coagulation tank, the inner and outer surfaces of the conventional metal revolving cup are treated with the insulating coating, the original metal material is remained without any treatment in the coagulation tank area, the revolving cup shaft is grounded, when the spinneret of the electrostatic spinning device is endowed with high potential, only the coagulation tank is at the grounding potential in the revolving cup, so the nanometer fiber prepared by the spinneret tends to move to the coagulation tank, and is mixed with the micron fiber conveyed by the fiber conveying channel in the coagulation tank, in the mixing process, because the revolving cup rotates at high speed, the nanometer fiber in the coagulation tank rotates along with the revolving cup to form the orientation similar to the micron fiber, in addition, because the revolving cup yarn has the special structure with different internal and external twists, the micro-nanometer revolving cup yarn spun by the method is not easy to untwist in the subsequent processing and using processes of the yarn, thereby avoiding the shedding of the nano-scale fibers and further avoiding the unexpected damage of the shedding nano-scale fibers to the surrounding environment or human body. The spinning method based on the micro-nano yarn inherits the advantage of high speed of spinning the yarn by the rotor, simultaneously, the content of the nano-scale fibers in the micro-nano yarn can be regulated and controlled by the spray head and related parameters and can reach 7.0 wt%, and the nano-scale fibers in the micro-nano yarn are not easy to fall off in the subsequent processing and using processes, so that the functionality and the stability of the yarn are ensured.
Advantageous effects
(1) The invention provides a preparation device and a preparation method of micro-nano rotor yarns, and provides a scheme for directly preparing the micro-nano yarns, wherein an electrostatic spinning technology is added in a rotor spinning process, and nano-scale fibers and micron-scale fibers to be twisted into yarns are directly mixed and twisted in a coagulation tank, so that the possibility of mechanical damage of the nano-scale fibers is reduced to the greatest extent;
(2) the preparation device and the preparation method of the micro-nano rotor yarn are realized under the condition that the traditional rotor spinning device is hardly changed, only the rotor is subjected to necessary coating treatment and an additional electrostatic spinning device is added, and any complicated transformation such as transformation on a transmission device, a core device and a spinning mechanism is not carried out, so that the micro-nano rotor yarn can be quickly transformed on the basis of the original equipment;
(3) according to the preparation device and the preparation method of the micro-nano rotor yarn, the nano-scale fibers are subjected to the twisting process in the rotor spinning process which is completely the same as that of the micron-scale fibers, the obtained micro-nano rotor yarn is stable in structure, the nano-scale fibers are not easy to fall off due to untwisting in the subsequent using process, and the influence of uncertainty harm of the nano-scale fibers is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a micro-nano rotor yarn preparation device according to the present invention;
wherein, 1-electrostatic spinning device, 2-fiber conveying channel, 3-revolving cup, 4-revolving cup shaft, and 5-coagulation tank.
Detailed Description
The invention will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
Example 1
A preparation device of micro-nano rotor yarn is shown in figure 1 and comprises a rotor spinning device and an electrostatic spinning device 1;
the rotor spinning device comprises a rotor 3 and a fiber conveying channel 2, wherein the rotor 3 is a metal rotor with the diameter of 32mm, and insulating ceramic coatings with the thickness of 0.2mm are coated on the inner surface and the outer surface of the rotor 3 except for a condensation groove 5; the fiber conveying channel 2 is used for conveying micron-sized fibers, the bottom of the rotating cup 3 is connected with a conductive rotating cup shaft 4, and the rotating cup shaft 4 is grounded;
the spinneret of the electrostatic spinning device 1 is over against the coagulation tank 5 of the revolving cup 3, the angle formed between the direction of the spinneret needle of the electrostatic spinning device 1 and the central line of the fiber conveying channel 2 is 5 degrees, and the minimum distance from the outlet of the spinneret to the coagulation tank 5 is 3 cm;
the spinning nozzle of the electrostatic spinning device 1 is a single needle head;
the method for preparing the micro-nano rotor yarn by adopting the preparation device for the micro-nano rotor yarn comprises the following specific processes:
the sliver fed by the feeding roller is carded into single fibers, namely micron-sized fibers, by a carding roller rotating at a high speed; then, the micron-sized fibers are condensed to a condensing groove 5 of the rotating cup 3 through a fiber conveying channel 2 under the action of negative pressure air flow and centrifugal force of high-speed rotation of the rotating cup 3, meanwhile, the condensing groove 5 which is not subjected to insulation treatment is used as a receiving unit of the electrostatic spinning device 1 to collect the nano-sized fibers sprayed out from a spinning nozzle of the electrostatic spinning device 1, the nano-sized fibers are uniformly attached to the micron-sized fibers in the condensing groove 5 along with the high-speed rotation of the rotating cup 3, and the nano-sized fibers are continuously condensed to the condensing groove 5 along with the micron-sized fibers, so that the mixing of the nano-sized fibers and the micron-sized fibers is realized; further twisting under the high-speed rotation action of the rotor 3 to prepare micro-nano rotor yarns, and then leading out the micro-nano rotor yarns from a yarn-leading tube under the action of an electronic yarn-leading device and winding the micro-nano rotor yarns into a tube;
the process conditions are as follows: the rotating speed of the rotating cup is 120000r/min, the rotating speed of the carding roller is 9000r/min, the negative pressure of the outlet of the rotating cup is-9000 Pa, the input power voltage in the electrostatic spinning device 1 is 380V, the output power voltage is 50kV, the capacity of an injector connected with a spinning nozzle is 5mL, and the injection speed of spinning solution in the injector is 36.0 muL/min.
The fineness of the micro-nano rotor yarn is 15tex, the twist is 100 twists/10 cm, the yarn forming speed is 120m/min, and the mass content of the nano-scale fibers in the prepared micro-nano rotor yarn is 2.0 wt%.
Example 2
A preparation device of micro-nano rotor yarns comprises a rotor spinning device and an electrostatic spinning device;
the rotor spinning device comprises a rotor and a fiber conveying channel, wherein the rotor is a metal rotor with the diameter of 36mm, and insulating ceramic coatings with the thickness of 0.3mm are coated on the inner surface and the outer surface of the rotor except for a coagulation groove; the fiber conveying channel is used for conveying micron-sized fibers, the bottom of the rotating cup is connected with a conductive rotating cup shaft, and the rotating cup shaft is grounded;
the spinneret of the electrostatic spinning device is over against the coagulation tank of the revolving cup, the angle formed between the direction of the needle head of the spinneret of the electrostatic spinning device and the central line of the fiber conveying channel is 45 degrees, and the minimum distance between the outlet of the spinneret and the coagulation tank is 3 cm;
the spinneret of the electrostatic spinning device is a coaxial needle;
the method for preparing the micro-nano rotor yarn by adopting the preparation device for the micro-nano rotor yarn comprises the following specific processes:
the sliver fed by the feeding roller is carded into single fibers, namely micron-sized fibers, by a carding roller rotating at a high speed; then the micron-sized fibers are condensed to a condensing groove of the revolving cup under the action of negative pressure airflow and centrifugal force of high-speed rotation of the revolving cup through a fiber conveying channel, meanwhile, the condensing groove which is not subjected to insulation treatment is used as a receiving unit of the electrostatic spinning device to collect the nano-sized fibers sprayed out by a spinning nozzle of the electrostatic spinning device, and along with the high-speed rotation of the revolving cup, the nano-sized fibers are uniformly attached to the micron-sized fibers in the condensing groove and are continuously condensed to the condensing groove along with the micron-sized fibers, so that the mixing of the nano-sized fibers and the micron-sized fibers is realized; further twisting under the high-speed rotation action of the rotor to prepare micro-nano rotor yarns, and then leading out the micro-nano rotor yarns from a yarn-leading tube under the action of an electronic yarn-leading device and winding the micro-nano rotor yarns into a tube;
the process conditions are as follows: the rotating speed of the rotating cup is 100000r/min, the rotating speed of the carding roller is 8000r/min, the negative pressure of the outlet of the rotating cup is-8000 Pa, the input power voltage in the electrostatic spinning device is 380V, the output power voltage is 50kV, the capacity of an injector connected with a spinning nozzle is 20mL, and the injection speed of spinning solution in the injector is 90.0 muL/min.
The fineness of the micro-nano rotor yarn is 30tex, the twist is 100 twists/10 cm, the yarn forming speed is 100m/min, and the mass content of the nano-scale fibers in the prepared micro-nano rotor yarn is 3.0 wt%.
Example 3
A preparation device of micro-nano rotor yarns comprises a rotor spinning device and an electrostatic spinning device;
the rotor spinning device comprises a rotor and a fiber conveying channel, wherein the rotor is a metal rotor with the diameter of 46mm, and insulating ceramic coatings with the thickness of 0.4mm are coated on the inner surface and the outer surface of the rotor except for a coagulation groove; the fiber conveying channel is used for conveying micron-sized fibers, the bottom of the rotating cup is connected with a conductive rotating cup shaft, and the rotating cup shaft is grounded;
the spinneret of the electrostatic spinning device is over against the coagulation tank of the revolving cup, the angle formed between the direction of the needle head of the spinneret of the electrostatic spinning device and the central line of the fiber conveying channel is 45 degrees, and the minimum distance between the outlet of the spinneret and the coagulation tank is 4 cm;
the spinneret of the electrostatic spinning device is a coaxial needle;
the method for preparing the micro-nano rotor yarn by adopting the preparation device for the micro-nano rotor yarn comprises the following specific processes:
the sliver fed by the feeding roller is carded into single fibers, namely micron-sized fibers, by a carding roller rotating at a high speed; then the micron-sized fibers are condensed to a condensing groove of the revolving cup under the action of negative pressure airflow and centrifugal force of high-speed rotation of the revolving cup through a fiber conveying channel, meanwhile, the condensing groove which is not subjected to insulation treatment is used as a receiving unit of the electrostatic spinning device to collect the nano-sized fibers sprayed out by a spinning nozzle of the electrostatic spinning device, and along with the high-speed rotation of the revolving cup, the nano-sized fibers are uniformly attached to the micron-sized fibers in the condensing groove and are continuously condensed to the condensing groove along with the micron-sized fibers, so that the mixing of the nano-sized fibers and the micron-sized fibers is realized; further twisting under the high-speed rotation action of the rotor to prepare micro-nano rotor yarns, and then leading out the micro-nano rotor yarns from a yarn-leading tube under the action of an electronic yarn-leading device and winding the micro-nano rotor yarns into a tube;
the process conditions are as follows: the rotating speed of the rotor is 80000r/min, the rotating speed of the carding roller is 7000r/min, the negative pressure at the outlet of the rotor is-7000 Pa, the input power voltage in the electrostatic spinning device is 380V, the output power voltage is 40kV, the capacity of a syringe connected with a spinning nozzle is 50mL, and the injection speed of spinning solution in the syringe is 176.0 muL/min.
The fineness of the micro-nano rotor yarn is 50tex, the twist is 90 twists/10 cm, the yarn forming speed is 88.89m/min, and the mass content of the nano-scale fibers in the prepared micro-nano rotor yarn is 4.0 wt%.
Example 4
A preparation device of micro-nano rotor yarns comprises a rotor spinning device and an electrostatic spinning device;
the rotor spinning device comprises a rotor and a fiber conveying channel, wherein the rotor is a metal rotor with the diameter of 56mm, and insulating ceramic coatings with the thickness of 0.5mm are coated on the inner surface and the outer surface of the rotor except for a coagulation groove; the fiber conveying channel is used for conveying micron-sized fibers, the bottom of the rotating cup is connected with a conductive rotating cup shaft, and the rotating cup shaft is grounded;
the spinneret of the electrostatic spinning device is over against the coagulation tank of the revolving cup, and the minimum distance between the outlet of the spinneret and the coagulation tank is 5 cm;
the spinneret of the electrostatic spinning device is a multi-needle (three needles), the outlets of all the needles are positioned on the same horizontal plane, the angles formed by all the needles and the horizontal plane are the same, and the minimum distances from the outlets of all the needles to the coagulation tank are the same;
the method for preparing the micro-nano rotor yarn by adopting the preparation device for the micro-nano rotor yarn comprises the following specific processes:
the sliver fed by the feeding roller is carded into single fibers, namely micron-sized fibers, by a carding roller rotating at a high speed; then the micron-sized fibers are condensed to a condensing groove of the revolving cup under the action of negative pressure airflow and centrifugal force of high-speed rotation of the revolving cup through a fiber conveying channel, meanwhile, the condensing groove which is not subjected to insulation treatment is used as a receiving unit of the electrostatic spinning device to collect the nano-sized fibers sprayed out by a spinning nozzle of the electrostatic spinning device, and along with the high-speed rotation of the revolving cup, the nano-sized fibers are uniformly attached to the micron-sized fibers in the condensing groove and are continuously condensed to the condensing groove along with the micron-sized fibers, so that the mixing of the nano-sized fibers and the micron-sized fibers is realized; further twisting under the high-speed rotation action of the rotor to prepare micro-nano rotor yarns, and then leading out the micro-nano rotor yarns from a yarn-leading tube under the action of an electronic yarn-leading device and winding the micro-nano rotor yarns into a tube;
the process conditions are as follows: the rotating speed of the rotor is 60000r/min, the rotating speed of the carding roller is 6000r/min, the negative pressure of the outlet of the rotor is-6000 Pa, the input power voltage in the electrostatic spinning device is 220V, the output power voltage is 30kV, the capacity of an injector connected with a spinning nozzle is 100mL, and the injection speed of spinning solution in the injector is 233.5 muL/min.
The fineness of the micro-nano rotor yarn is 70tex, the twist is 90 twist/10 cm, the yarn forming speed is 66.67m/min, and the mass content of the nano-scale fibers in the prepared micro-nano rotor yarn is 5.0 wt%.
Example 5
A preparation device of micro-nano rotor yarns comprises a rotor spinning device and an electrostatic spinning device;
the rotor spinning device comprises a rotor and a fiber conveying channel, wherein the rotor is a metal rotor with the diameter of 66mm, and insulating ceramic coatings with the thickness of 0.5mm are coated on the inner surface and the outer surface of the rotor except for a coagulation groove; the fiber conveying channel is used for conveying micron-sized fibers, the bottom of the rotating cup is connected with a conductive rotating cup shaft, and the rotating cup shaft is grounded;
the spinneret of the electrostatic spinning device is over against the coagulation tank of the revolving cup, and the minimum distance from the outlet of the spinneret to the coagulation tank is 6 cm;
the spinneret of the electrostatic spinning device is a multi-needle (four-needle) nozzle, the outlets of all the needles are positioned on the same horizontal plane, the angles formed by all the needles and the horizontal plane are the same, and the minimum distances from the outlets of all the needles to the coagulation tank are the same;
the method for preparing the micro-nano rotor yarn by adopting the preparation device for the micro-nano rotor yarn comprises the following specific processes:
the sliver fed by the feeding roller is carded into single fibers, namely micron-sized fibers, by a carding roller rotating at a high speed; then the micron-sized fibers are condensed to a condensing groove of the revolving cup under the action of negative pressure airflow and centrifugal force of high-speed rotation of the revolving cup through a fiber conveying channel, meanwhile, the condensing groove which is not subjected to insulation treatment is used as a receiving unit of the electrostatic spinning device to collect the nano-sized fibers sprayed out by a spinning nozzle of the electrostatic spinning device, and along with the high-speed rotation of the revolving cup, the nano-sized fibers are uniformly attached to the micron-sized fibers in the condensing groove and are continuously condensed to the condensing groove along with the micron-sized fibers, so that the mixing of the nano-sized fibers and the micron-sized fibers is realized; further twisting under the high-speed rotation action of the rotor to prepare micro-nano rotor yarns, and then leading out the micro-nano rotor yarns from a yarn-leading tube under the action of an electronic yarn-leading device and winding the micro-nano rotor yarns into a tube;
the process conditions are as follows: the rotating speed of the rotating cup is 25000r/min, the rotating speed of the carding roller is 4000r/min, the negative pressure of the outlet of the rotating cup is-4000 Pa, the input power voltage in the electrostatic spinning device is 220V, the output power voltage is 30kV, the capacity of an injector connected with a spinning nozzle is 100mL, and the injection speed of spinning solution in the injector is 218.8 muL/min.
The fineness of the micro-nano rotor yarn is 100tex, the twist is 80 twists/10 cm, the yarn forming speed is 31.25m/min, and the mass content of the nano-scale fibers in the prepared micro-nano rotor yarn is 7.0 wt%.
Claims (9)
1. The utility model provides a preparation facilities of micro-nano rotor yarn which characterized in that: comprises a rotor spinning device and an electrostatic spinning device; the rotor spinning device comprises a rotor and a fiber conveying channel for conveying micron-sized fibers; the rotating cup is made of metal, and the inner surface and the outer surface of the rotating cup except the coagulation tank are coated with insulating coatings; the bottom of the rotating cup is connected with a conductive rotating cup shaft, and the rotating cup shaft is grounded; the spinneret of the electrostatic spinning device is opposite to the coagulation groove of the rotating cup.
2. The device for preparing the micro-nano rotor yarn according to claim 1, wherein an angle formed between a spinneret needle direction of the electrostatic spinner and a central line of the fiber conveying channel is 5-175 degrees, and a minimum distance from an outlet of the spinneret to the coagulation tank is 3-6 cm.
3. The apparatus for preparing micro-nano rotor yarn according to claim 1, wherein the spinneret of the electrostatic spinner is a needle spinneret.
4. The device for preparing the micro-nano rotor yarn according to claim 3, wherein a spinneret of the electrostatic spinner is a single needle, a parallel needle, a multi-needle or a coaxial needle;
when the spinneret is a multi-needle spinneret, all the needle outlets are positioned on the same horizontal plane, the angles between all the needles and the horizontal plane are the same, and the minimum distances from all the needle outlets to the coagulation tank are the same.
5. The device for preparing micro-nano rotor yarns according to claim 1, wherein the insulating coating is an insulating ceramic coating.
6. The device for preparing micro-nano rotor yarns according to claim 5, wherein the thickness of the insulating coating is 0.2-0.5 mm.
7. A method for preparing micro-nano rotor yarns by adopting the device as claimed in any one of claims 1 to 6, which is characterized by comprising the following steps: the micron-sized fiber output by the fiber transmission channel and the nano-sized fiber spun by the electrostatic spinning are mixed and twisted in a coagulation groove of the rotor to prepare the micro-nano rotor yarn.
8. The method of claim 7, wherein the diameter of the rotor is 32 to 66mm, the rotating speed of the rotor is 25000 to 120000r/min, the rotating speed of the carding roller is 4000 to 10000r/min, and the negative pressure at the outlet of the rotor is-2000 to-9000 Pa; the input power supply voltage in the electrostatic spinning device is 220V or 380V, and the output power supply voltage is 8-50 kV; the volume of an injector connected with a spinning nozzle is 5-100 mL, and the injection speed of spinning solution in the injector is 1.0-300.0 mu L/min.
9. The method as claimed in claim 7, wherein the micro-nano rotor yarn has a yarn fineness of 10 to 100tex, a yarn twist of 50 to 150 twists/10 cm, a yarn forming speed of 20 to 150m/min, and a mass content of nano-fibers in the micro-nano rotor yarn of 2.0 to 7.0 wt%.
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