CN109957963B - Preparation method of conductive fiber - Google Patents
Preparation method of conductive fiber Download PDFInfo
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- CN109957963B CN109957963B CN201910271359.5A CN201910271359A CN109957963B CN 109957963 B CN109957963 B CN 109957963B CN 201910271359 A CN201910271359 A CN 201910271359A CN 109957963 B CN109957963 B CN 109957963B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/04—Physical treatment combined with treatment with chemical compounds or elements
- D06M10/06—Inorganic compounds or elements
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
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- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Physical Vapour Deposition (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
The invention discloses a preparation method of a conductive fiber, which comprises the following steps of a, immersing the fiber into absolute ethyl alcohol to remove surface grease, and washing the fiber for 5-6 min by using deionized water; b. b, penetrating the fiber treated in the step a into a magnetron sputtering machine, and sequentially plating a nickel layer, a titanium layer and a silver layer on the surface of the fiber by adopting a magnetron sputtering method; c. enabling the fibers plated with the metal layers to pass through a spiral wire feeding pipe of a microwave heater, starting the microwave heater to perform microwave heating on the fibers, controlling the heating temperature to be 200-300 ℃, and heating for 10-15 min; d. and cooling the heated metal fibers, and reducing the temperature of the fibers to normal temperature to form the conductive fibers.
Description
Technical Field
The invention relates to a fiber, in particular to a preparation method of a conductive fiber.
Background
With the continuous development of science and technology, the textile fiber layer meeting different requirements of people is endless so as to meet the requirements of consumers, and the textile fiber layer plays an increasingly important role in the daily life of people.
With the continuous development of the industry, the market of the fabric is also continuously expanded, but most of the fabrics have single effect and only have the shielding function, for example, cotton fiber products are easily affected by microorganisms and are easily corroded by bacteria and mould, and the antibacterial and mildewproof effects are not obvious; the cotton fiber has poor ultraviolet resistance, so that the skin can generate pigmentation and even cause skin cancer when the cotton fiber is used for making summer clothes. With the continuous improvement of living standards, the demands of people on necessities in life are also continuously improved, the fabric fibers used alone cannot meet the use demands of people at present after the fabric is made, usually, the elastic fibers cannot deposit a metal layer, the elastic fibers lose elasticity after the metal layer is deposited, and in order to meet the requirements of the elastic fiber material on conductivity and elasticity maintenance, the structure and the form of the metal conductive metal layer of the elastic material need to be researched and developed.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a preparation method of conductive fibers, which is characterized in that a metal layer is plated on the surface of the fibers through various metal plating processes, so that the fibers have conductivity, and higher requirements are met.
The technical scheme adopted by the invention is as follows: a preparation method of conductive fiber is characterized in that: the method specifically comprises the following steps:
a. immersing the fiber into absolute ethyl alcohol to remove surface grease, and then washing with deionized water for 5-6 min;
b. b, mounting the fiber treated in the step a on a discharge roller in a magnetron sputtering machine, and sequentially plating a nickel layer, a titanium layer and a silver layer on the surface of the fiber by adopting a magnetron sputtering method, wherein the method comprises the following steps:
b1, penetrating the fiber into a film tube with arc-shaped gaps at intervals on the surface, wherein the arc-shaped gaps are formed by smoothly connecting an arc and an elliptical arc and are wound on a material receiving roller at the other end, and controlling the fiber in the film tube to be in a stretching state;
b2, sequentially paving a nickel strip target, a titanium strip target and a silver strip target on a cathode of the magnetron sputtering machine, arranging magnetic control heads at intervals on an anode, wherein the positions of the magnetic control heads correspond to the positions of arc-shaped notches on the film tube;
b3, starting the magnetron sputtering machine, removing the baffle above the film tube after the glow is stable for 100s, so that atoms on the surface of the target material are sputtered to penetrate through the arc-shaped gap, and depositing on the surface of the fiber to form a linear metal film;
b4, synchronously driving the membrane tube and the material collecting roller to rotate, so that the arc-shaped notch on the surface of the membrane tube rotates, and the fiber moves forwards in the membrane tube, thereby synchronously plating a spiral nickel layer, a titanium layer and a silver layer on the surface of the fiber;
c. enabling the fibers plated with the metal layers to pass through a spiral wire feeding pipe of a microwave heater, starting the microwave heater to perform microwave heating on the fibers, controlling the heating temperature to be 200-300 ℃, and heating for 10-15 min to enhance the elasticity of the fibers;
d. and cooling the heated metal fibers, and reducing the temperature of the fibers to normal temperature to form the conductive fibers.
Preferably, the rotating speed of the membrane tube in the step b4 is 5r/min, and the advancing speed of the fiber is 5-10 m/min.
Preferably, the temperature of the absolute ethyl alcohol in the step a is 40-50 ℃.
Preferably, in the step b, the magnetron sputtering machine is vacuumized, and the vacuum degree is controlled between (1-9) multiplied by 10 < -2 > Pa and (1-9) multiplied by 10 < -5 > Pa.
Preferably, the shape of the arc notch is formed by smoothly connecting an arc 1/5-1/4 with an elliptical arc 1/4-1/3, so as to ensure that a spiral metal wire structure is formed on the surface of the fiber during the fiber movement.
Has the advantages that: according to the preparation method of the conductive fiber disclosed by the invention, the prepared fiber has the following beneficial effects:
the membrane tube with the arc-shaped notch is adopted to rotate, and a spiral metal layer can be formed on the surface of the fiber by matching with synchronous forward movement of the fiber, so that the fiber can be conductive, and the elastic force of the fiber is not influenced;
high elasticity adopts screwed pipe cooperation microwave heating for the heating is even, thereby ensures that the metal level is evenly attached to the fibre top layer, and the screwed pipe structure can promote the fibrous volume of simultaneous heating simultaneously, and the screw thread form can promote fibrous elasticity moreover.
Drawings
FIG. 1 is a structural view of a magnetic sputtering apparatus according to the present invention;
FIG. 2 is a structural view of a microwave heating apparatus according to the present invention;
FIG. 3 is an internal view of the microwave heating apparatus of FIG. 2;
1. the device comprises a cavity 11, a discharge roller 12, a receiving roller 13, a film tube 131, an arc-shaped notch 14, a baffle 15, a cathode 16, an anode 17, a strip target 18 and a magnetic control head; 2. a box body 21, a cooling pipe 22, a threaded pipe 23 and a microwave heating head.
Detailed Description
Specific examples of the present invention are described in detail below with reference to specific examples:
example 1
The invention discloses a preparation method of conductive fibers, which comprises the following steps:
a. immersing the fiber into absolute ethyl alcohol at the temperature of 40 ℃ to remove surface grease, and then washing the fiber for 5min by using deionized water;
b. b, mounting the fiber treated in the step a on a discharge roller 11 in a magnetron sputtering machine, vacuumizing the magnetron sputtering machine, wherein the vacuum degree is (1-9) multiplied by 10 < -2 > Pa, and sequentially plating a nickel layer, a titanium layer and a silver layer on the surface of the fiber by adopting a magnetron sputtering method, wherein the method comprises the following steps:
b1, penetrating the fiber into a film tube 13 with arc-shaped notches 131 at intervals on the surface, wherein the arc-shaped notches are formed by smoothly connecting an arc and an elliptical arc and are wound on a material receiving roller 12 at the other end to control the fiber in the film tube 13 to be in a stretching state;
b2, sequentially paving a nickel strip target 17, a titanium strip target 17 and a silver strip target 17 on a cathode 15 of the magnetron sputtering machine, arranging magnetic control heads 18 on an anode 16 at intervals, wherein the positions of the magnetic control heads 18 correspond to the positions of the arc-shaped gaps 131 on the film tube 13;
b3, starting the magnetron sputtering machine, removing the baffle plate 14 above the film tube 13 after the glow is stable for 100s, so that atoms on the surface of the target material are sputtered to penetrate through the arc-shaped notch 131, and depositing a linear metal film on the surface of the fiber;
b4, synchronously driving the membrane tube 13 and the material collecting roller 12 to rotate, so that the arc-shaped notch 131 on the surface of the membrane tube 13 rotates, and the fiber moves forwards in the membrane tube 13, thereby synchronously plating a spiral nickel layer, a titanium layer and a silver layer on the surface of the fiber, controlling the rotating speed of the membrane tube 13 to be 5r/min and the forward movement speed of the fiber to be 5 m/min;
c. the fiber plated with the metal layer passes through a spiral wire feeding pipe of a microwave heater, the microwave heater is started to carry out microwave heating on the fiber, the heating temperature is controlled to be 200 ℃, and the heating time is 10min, so that the elasticity of the fiber is enhanced;
d. and cooling the heated metal fibers, and reducing the temperature of the fibers to normal temperature to form the conductive fibers.
In this example, as shown in fig. 1, the magnetic sputtering apparatus is composed of a cavity 1, a discharging roller 11 and a receiving roller 12 disposed at two ends of the cavity 1, a film tube 13 disposed at the center of the cavity 1, and a cathode 15 plate and an anode 16 plate adsorbed on the inner wall of the cavity 1, the discharging roller 11 and the receiving roller 12 are driven by a motor, the film tube 13 is installed between the discharging roller 11 and the receiving roller 12, the film tube 13 is fixed by a bearing, one end of the film tube 13 is further provided with a driven gear connected with the motor by a driving gear, the film tube 13 is provided with an arc notch 131, the arc notch 131 is formed by smoothly connecting an arc and an elliptical arc, and is driven by the motor to move by self-transmission, the cathode 15 plate is distributed on the inner wall of the cavity 1 above the film tube 13, the anode 16 plate is disposed on the inner wall of the cavity 1 below the film tube 13, the anode 16 plate and the cathode 15 plate are distributed oppositely, at least one strip target 17 is arranged on the cathode 15 plate, and at least one magnetic control head 18 is arranged on the anode 16 plate.
In this embodiment, the shape of the arc notch is formed by smoothly connecting the arc 1/5-1/4 with the elliptical arc 1/4-1/3, so as to ensure that a spiral metal wire structure is formed on the surface of the fiber during the fiber movement.
In this example, the anode 16 plate in the magnetic sputtering apparatus is provided with a plurality of magnetic control heads 18, the number of the magnetic control heads 18 is at least equal to the number of the adsorption holes on the film tube 13, and it is at least ensured that each magnetic control head 18 corresponds to the adsorption hole on the film tube 13 one to one.
In this example, a baffle plate 14 is further arranged between a cathode 15 plate and an anode 16 plate in the magnetic sputtering device, two ends of the baffle plate 14 are hinged with two ends of the cavity 1, a rotating knob is arranged outside the cavity 1 and connected with the baffle plate 14, and the baffle plate 14 is arranged between the membrane tube 13 and the cathode 15 plate or the anode 16 plate.
In this example, as shown in fig. 2-3, the microwave heating device is a box 2, a cooling pipe 21 is disposed in the box 2, a metal threaded pipe 22 is wound around an outer wall of the cooling pipe 21, an inlet and an outlet of the metal threaded pipe 22 are disposed at upper and lower ends of the box 2, and microwave heating heads 23 are disposed on an upper end surface of the box 2 and distributed on the metal threaded pipe 22.
Example 2
The invention discloses a preparation method of conductive fibers, which comprises the following steps:
a. immersing the fiber into absolute ethyl alcohol at the temperature of 45 ℃ to remove surface grease, and then washing the fiber for 5-6 min by using deionized water;
b. b, mounting the fiber treated in the step a on a discharge roller 11 in a magnetron sputtering machine, vacuumizing the magnetron sputtering machine, controlling the vacuum degree to be (1-9) multiplied by 10 < -3 > Pa, and sequentially plating a nickel layer, a titanium layer and a silver layer on the surface of the fiber by adopting a magnetron sputtering method, wherein the method comprises the following steps:
b1, penetrating the fiber into a film tube 13 with arc-shaped notches 131 at intervals on the surface, wherein the arc-shaped notches are formed by smoothly connecting an arc and an elliptical arc and are wound on a material receiving roller 12 at the other end to control the fiber in the film tube 13 to be in a stretching state;
b2, sequentially paving a nickel strip target 17, a titanium strip target 17 and a silver strip target 17 on a cathode 15 of the magnetron sputtering machine, arranging magnetic control heads 18 on an anode 16 at intervals, wherein the positions of the magnetic control heads 18 correspond to the positions of the arc-shaped gaps 131 on the film tube 13;
b3, starting the magnetron sputtering machine, removing the baffle plate 14 above the film tube 13 after the glow is stable for 100s, so that atoms on the surface of the target material are sputtered to penetrate through the arc-shaped notch 131, and depositing a linear metal film on the surface of the fiber;
b4, synchronously driving the membrane tube 13 and the material collecting roller 12 to rotate, so that the arc-shaped notch 131 on the surface of the membrane tube 13 rotates, and the fiber moves forwards in the membrane tube 13, thereby synchronously plating a spiral nickel layer, a titanium layer and a silver layer on the surface of the fiber, controlling the rotating speed of the membrane tube 13 to be 5r/min and the forward moving speed of the fiber to be 8 m/min;
c. the fiber coated with the metal layer passes through a spiral wire feeding pipe of a microwave heater, the microwave heater is started to carry out microwave heating on the fiber, the heating temperature is controlled to be 25 ℃, and the heating time is 12min, so that the elasticity of the fiber is enhanced;
d. and cooling the heated metal fibers, and reducing the temperature of the fibers to normal temperature to form the conductive fibers.
In this example, as shown in fig. 1, the magnetic sputtering apparatus is composed of a cavity 1, a discharging roller 11 and a receiving roller 12 disposed at two ends of the cavity 1, a film tube 13 disposed at the center of the cavity 1, and a cathode 15 plate and an anode 16 plate adsorbed on the inner wall of the cavity 1, the discharging roller 11 and the receiving roller 12 are driven by a motor, the film tube 13 is installed between the discharging roller 11 and the receiving roller 12, the film tube 13 is fixed by a bearing, one end of the film tube 13 is further provided with a driven gear connected with the motor by a driving gear, the film tube 13 is provided with an arc notch 131, the arc notch 131 is formed by smoothly connecting an arc and an elliptical arc, and is driven by the motor to move by self-transmission, the cathode 15 plate is distributed on the inner wall of the cavity 1 above the film tube 13, the anode 16 plate is disposed on the inner wall of the cavity 1 below the film tube 13, the anode 16 plate and the cathode 15 plate are distributed oppositely, at least one strip target 17 is arranged on the cathode 15 plate, and at least one magnetic control head 18 is arranged on the anode 16 plate.
In this embodiment, the shape of the arc notch is formed by smoothly connecting the arc 1/5-1/4 with the elliptical arc 1/4-1/3, so as to ensure that a spiral metal wire structure is formed on the surface of the fiber during the fiber movement.
In this example, the anode 16 plate in the magnetic sputtering apparatus is provided with a plurality of magnetic control heads 18, the number of the magnetic control heads 18 is at least equal to the number of the adsorption holes on the film tube 13, and it is at least ensured that each magnetic control head 18 corresponds to the adsorption hole on the film tube 13 one to one.
In this example, a baffle plate 14 is further arranged between a cathode 15 plate and an anode 16 plate in the magnetic sputtering device, two ends of the baffle plate 14 are hinged with two ends of the cavity 1, a rotating knob is arranged outside the cavity 1 and connected with the baffle plate 14, and the baffle plate 14 is arranged between the membrane tube 13 and the cathode 15 plate or the anode 16 plate.
In this example, as shown in fig. 2-3, the microwave heating device is a box 2, a cooling pipe 21 is disposed in the box 2, a metal threaded pipe 22 is wound around an outer wall of the cooling pipe 21, an inlet and an outlet of the metal threaded pipe 22 are disposed at upper and lower ends of the box 2, and microwave heating heads 23 are disposed on an upper end surface of the box 2 and distributed on the metal threaded pipe 22.
Example 3
The invention discloses a preparation method of conductive fibers, which comprises the following steps:
a. immersing the fiber into absolute ethyl alcohol at the temperature of 50 ℃ to remove surface grease, and then washing the fiber for 6min by using deionized water;
b. b, mounting the fiber treated in the step a on a discharge roller 11 in a magnetron sputtering machine, vacuumizing the magnetron sputtering machine, controlling the vacuum degree to be (1-9) multiplied by 10 < -5 > Pa, and sequentially plating a nickel layer, a titanium layer and a silver layer on the surface of the fiber by adopting a magnetron sputtering method, wherein the method comprises the following steps:
b1, penetrating the fiber into a film tube 13 with arc-shaped notches 131 at intervals on the surface, wherein the arc-shaped notches are formed by smoothly connecting an arc and an elliptical arc and are wound on a material receiving roller 12 at the other end to control the fiber in the film tube 13 to be in a stretching state;
b2, sequentially paving a nickel strip target 17, a titanium strip target 17 and a silver strip target 17 on a cathode 15 of the magnetron sputtering machine, arranging magnetic control heads 18 on an anode 16 at intervals, wherein the positions of the magnetic control heads 18 correspond to the positions of the arc-shaped gaps 131 on the film tube 13;
b3, starting the magnetron sputtering machine, removing the baffle plate 14 above the film tube 13 after the glow is stable for 100s, so that atoms on the surface of the target material are sputtered to penetrate through the arc-shaped notch 131, and depositing a linear metal film on the surface of the fiber;
b4, synchronously driving the membrane tube 13 and the material collecting roller 12 to rotate, so that the arc-shaped notch 131 on the surface of the membrane tube 13 rotates, and the fiber moves forwards in the membrane tube 13, thereby synchronously plating a spiral nickel layer, a titanium layer and a silver layer on the surface of the fiber, controlling the rotating speed of the membrane tube 13 to be 5r/min and the forward moving speed of the fiber to be 10 m/min;
c. the fiber plated with the metal layer passes through a spiral wire feeding pipe of a microwave heater, the microwave heater is started to carry out microwave heating on the fiber, the heating temperature is controlled to be 300 ℃, and the heating time is 15min, so that the elasticity of the fiber is enhanced;
d. and cooling the heated metal fibers, and reducing the temperature of the fibers to normal temperature to form the conductive fibers.
In this example, as shown in fig. 1, the magnetic sputtering apparatus is composed of a cavity 1, a discharging roller 11 and a receiving roller 12 disposed at two ends of the cavity 1, a film tube 13 disposed at the center of the cavity 1, and a cathode 15 plate and an anode 16 plate adsorbed on the inner wall of the cavity 1, the discharging roller 11 and the receiving roller 12 are driven by a motor, the film tube 13 is installed between the discharging roller 11 and the receiving roller 12, the film tube 13 is fixed by a bearing, one end of the film tube 13 is further provided with a driven gear connected with the motor by a driving gear, the film tube 13 is provided with an arc notch 131, the arc notch 131 is formed by smoothly connecting an arc and an elliptical arc, and is driven by the motor to move by self-transmission, the cathode 15 plate is distributed on the inner wall of the cavity 1 above the film tube 13, the anode 16 plate is disposed on the inner wall of the cavity 1 below the film tube 13, the anode 16 plate and the cathode 15 plate are distributed oppositely, at least one strip target 17 is arranged on the cathode 15 plate, and at least one magnetic control head 18 is arranged on the anode 16 plate.
In this embodiment, the shape of the arc notch is formed by smoothly connecting the arc 1/5-1/4 with the elliptical arc 1/4-1/3, so as to ensure that a spiral metal wire structure is formed on the surface of the fiber during the fiber movement.
In this example, the anode 16 plate in the magnetic sputtering apparatus is provided with a plurality of magnetic control heads 18, the number of the magnetic control heads 18 is at least equal to the number of the adsorption holes on the film tube 13, and it is at least ensured that each magnetic control head 18 corresponds to the adsorption hole on the film tube 13 one to one.
In this example, a baffle plate 14 is further arranged between a cathode 15 plate and an anode 16 plate in the magnetic sputtering device, two ends of the baffle plate 14 are hinged with two ends of the cavity 1, a rotating knob is arranged outside the cavity 1 and connected with the baffle plate 14, and the baffle plate 14 is arranged between the membrane tube 13 and the cathode 15 plate or the anode 16 plate.
In this example, as shown in fig. 2-3, the microwave heating device is a box 2, a cooling pipe 21 is disposed in the box 2, a metal threaded pipe 22 is wound around an outer wall of the cooling pipe 21, an inlet and an outlet of the metal threaded pipe 22 are disposed at upper and lower ends of the box 2, and microwave heating heads 23 are disposed on an upper end surface of the box 2 and distributed on the metal threaded pipe 22.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (5)
1. A preparation method of conductive fiber is characterized in that: the method specifically comprises the following steps:
a. immersing the fiber into absolute ethyl alcohol to remove surface grease, and then washing with deionized water for 5-6 min;
b. b, mounting the fiber treated in the step a on a discharge roller in a magnetron sputtering machine, and sequentially plating a nickel layer, a titanium layer and a silver layer on the surface of the fiber by adopting a magnetron sputtering method, wherein the method comprises the following steps:
b1, penetrating the fiber into a membrane tube with arc-shaped gaps at intervals on the surface, wherein the arc-shaped gaps are formed by smoothly connecting an arc and an elliptic arc and are wound on a material receiving roller at the other end, and controlling the fiber in the membrane tube to be in a stretching state;
b2, sequentially paving a nickel strip target, a titanium strip target and a silver strip target on a cathode of the magnetron sputtering machine, arranging magnetic control heads at intervals on an anode, wherein the positions of the magnetic control heads correspond to the positions of the arc-shaped notches on the film tube;
b3, starting the magnetron sputtering machine, removing the baffle above the film tube after the glow starting is stable for 100s, so that atoms on the surface of the target material are sputtered out to pass through the arc-shaped notch, and depositing on the surface of the fiber to form a linear metal film;
b4, synchronously driving the membrane tube and the material collecting roller to rotate, so that the arc-shaped notch on the surface of the membrane tube rotates, and the fiber moves forwards in the membrane tube, thereby synchronously plating a spiral nickel layer, a titanium layer and a silver layer on the surface of the fiber;
c. enabling the fiber coated with the metal layer to pass through a spiral wire feeding pipe of a microwave heater, starting the microwave heater to perform microwave heating on the fiber, controlling the heating temperature to be 150-;
d. and cooling the heated conductive fiber, and reducing the temperature of the fiber to normal temperature to form the conductive fiber.
2. The method for preparing a conductive fiber according to claim 1, wherein: and b4, the rotating speed of the film tube is 5r/min, and the forward moving speed of the fiber is 5-10 m/min.
3. The method for preparing a conductive fiber according to claim 1, wherein: the temperature of the absolute ethyl alcohol in the step a is 40-50 ℃.
4. The method for preparing a conductive fiber according to claim 1, wherein: in the step b, the magnetron sputtering machine is vacuumized, and the vacuum degree is controlled to be (1-9) multiplied by 10-2Pa～(1～9)×10-5Pa is between Pa.
5. The method for preparing a conductive fiber according to claim 1, wherein: the shape of the arc notch is formed by smoothly connecting an arc 1/5-1/4 with an elliptical arc 1/4-1/3, so that a spiral metal wire structure is formed on the surface of the fiber in the fiber movement process.
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