TWI884063B - Fiber with conductive layer and preparation method thereof - Google Patents

Abstract

The present invention relates to a preparation method of a fiber with a conductive layer, which includes the steps of A) mixing water and an anti-settling agent uniformly, adding a bonding resin, and then adding a conductive material after ultrasonic vibration, and mixing and dispersing in a bead mill to prepare a liquid phase resin; B) taking a fiber substrate, and coating the liquid phase resin on the outer surface of the fiber substrate by coating; and C) performing a high temperature carbonization process or metallization process to solidify the liquid phase resin coated on the outer surface of the fiber substrate. In this way, the coating method can avoid industrial wastewater generated by traditional electroplating processes, and has the advantages of environmental protection and low cost.

Description

Fiber with conductive layer and preparation method thereof

The present invention relates to a fiber with a conductive layer and a preparation method thereof. A conductive layer is coated on the outer surface of a fiber substrate by a coating method, so that the fiber substrate has a conductive layer completely coated with a conductive material.

Currently, textile products such as thermostatic clothing, physiological sensing clothing and embedded electronic clothing have been developed. They combine conductive materials with textile fibers, weave the fibers into conductive fabrics, and finally make various clothing, so that the clothing worn on the human body can receive and send electronic signals. Such clothing is called smart textiles and can be applied to sports and fitness, medical care, home life, fashion and entertainment, and military security. In addition to directly combining conductive materials with fibers to make conductive fabrics, there is also a method of combining conductive inks or conductive films with clothing. It can be seen that the research and development of smart textiles has gradually become a trend in the future textile industry.

US Patent Publication No. US 20180187077 A1 discloses a conductive fiber with a metal coating, which first deposits a nickel metal layer on the fiber by chemical plating, and then electroplates one or more layers of metal materials such as tin, nickel, copper, silver or gold on the nickel metal layer. Although the metal material can be plated on the surface of the fiber material by chemical plating and electroplating, the electroplating process itself will produce industrial wastewater, which contains toxic heavy metals and cyanide. Therefore, the industrial wastewater produced by electroplating needs to be treated by back-end equipment before it can be discharged or recycled, which will lead to a significant increase in manufacturing costs.

Furthermore, in the past, when making conductive fabric, a whole piece of fabric is usually coated with conductive material so that the surface of the fabric has a conductive layer, and then cut into pieces to make clothing. However, the conductive fabric that has been cut does not have a conductive layer formed on the cut surface, and the conductive ability is relatively insufficient. Therefore, how to provide an environmentally friendly process for coating conductive material on fiber material, reduce manufacturing costs, and enable the conductive material to completely cover the fiber material, this is the direction that the inventor has thought of.

Now, the inventors have found that the above-mentioned existing conductive fiber manufacturing process still has many deficiencies in actual implementation, so they have improved it with their rich professional knowledge and many years of practical experience, and have developed the present invention accordingly.

The main purpose of the present invention is to provide a method for preparing a fiber with a conductive layer, which uses a coating method to coat a conductive layer on the outer surface of the fiber material. Compared with the electroplating process, the preparation method of the present invention has the advantages of environmental protection and low cost.

In order to achieve the above-mentioned implementation purpose, the preparation method of the fiber with a conductive layer of the present invention includes the steps of A) mixing water and an anti-settling agent uniformly, adding a bonding resin, and after ultrasonic vibration, adding a conductive material, mixing and dispersing in a bead mill to prepare a liquid phase resin; B) taking a fiber substrate, coating the liquid phase resin on the outer surface of the fiber substrate by a coating method; and C) performing a high temperature carbonization process or a metallization process to solidify the liquid phase resin coated on the outer surface of the fiber substrate.

In one embodiment of the present invention, in step A), water and an anti-settling agent are mixed uniformly, and then a conductive polymer material and a bonding resin are added. After ultrasonic vibration, the conductive material is added, and after mixing and dispersing in a bead mill, a liquid phase resin is prepared.

In one embodiment of the present invention, the conductive polymer material is poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate), PEDOT:PSS.

In one embodiment of the present invention, in step A), water and an anti-settling agent are mixed uniformly, and then a bonding resin is added. After ultrasonic vibration, a conductive material and a dye are added, and after mixing and dispersing in a bead mill, a liquid phase resin is prepared.

In one embodiment of the present invention, the fiber substrate is natural fiber, synthetic fiber, woven fabric, nonwoven fabric or film, and the fiber substrate is dyed or undyed.

In one embodiment of the present invention, the anti-settling agent is at least one selected from the group consisting of sodium carboxyethyl cellulose (CMC), ammonium salt of polycarboxylic acid, polysulfonate, polyether salts, hydrogenated nitrile rubber (H-NBR), sodium salt of polynaphthalene sulphonic acid (NNO), gamma-butyrolactone (GBL), isophorone, butyl acetate and ethyl acetate.

In one embodiment of the present invention, the adhesive resin is at least one selected from the group consisting of waterborne polyurethane, thermoplastic polyurethane, polyester resin, poly(ethyl acrylate), polyacrylic acid resin, poly(butyl acrylate), unsaturated polyester resin, polyamide resin, polyvinyl acetate (PVA), waterborne rubber and waterborne epoxy resin.

In one embodiment of the present invention, the conductive material is single-walled carbon nanotubes, multi-walled carbon nanotubes or metal particles.

In one embodiment of the present invention, step B) further includes a thickness control procedure to control the thickness of the liquid resin coated on the fiber substrate to be within a range of 5 μm-300 μm.

In one embodiment of the present invention, the denier number of the fiber substrate coated with the liquid phase resin is increased by 5-300% compared to the fiber substrate not coated with the liquid phase resin.

In one embodiment of the present invention, the high temperature carbonization process or metallization process of step C) is to perform a first high temperature carbonization treatment or metallization treatment in a reaction chamber at a temperature of 100°C-180°C, then stretch the fiber substrate, and then perform a second high temperature carbonization treatment or metallization treatment in a reaction chamber at a temperature of 100°C-180°C, and then stretch the fiber substrate again to solidify the liquid phase resin coated on the surface of the fiber substrate.

Another object of the present invention is to provide a fiber with a conductive layer, which includes a fiber substrate having an outer surface; and a conductive layer having an anti-settling agent, a bonding resin and a conductive material, the conductive layer is coated on the outer surface of the fiber substrate, and the conductive material is single-walled carbon nanotubes, multi-walled carbon nanotubes or metal particles.

In another embodiment of the present invention, the thickness of the conductive layer is 5 μm-300 μm.

In another embodiment of the present invention, the resistance of the conductive layer is 10 ^-4 -10 ⁸ Ω/cm.

In another embodiment of the present invention, the Denier number of the fiber substrate coated with the conductive layer is increased by 5-300% compared to the fiber substrate not coated with the conductive layer.

In another embodiment of the present invention, the conductive layer further includes a conductive polymer material.

In another embodiment of the present invention, the conductive layer further includes a dye.

Please refer to FIG. 1 and FIG. 2 . The fiber 1 with a conductive layer of the present invention mainly comprises a fiber substrate 11 and a conductive layer 13 completely covering the outer surface 12 of the fiber substrate 11 . As shown in FIG. 1 , the conductive layer 13 comprises an anti-settling agent 131 , an adhesive resin 132 and a conductive material 133 .

The preparation method of the fiber 1 with a conductive layer of the present invention sequentially performs steps S1 to S3. Step S1, as shown in FIG2 , uses water as a solvent, adds an anti-settling agent 131 to the water and mixes them evenly, then adds a bonding resin 132 to the mixture of water and the anti-settling agent 131. The bonding resin 132 is thick, so it needs to be placed in an ultrasonic oscillator. After ultrasonic oscillation, the bonding resin 132, water and the anti-settling agent 131 are evenly mixed, and then a conductive material 133 is added to the water, the anti-settling agent 131 and the bonding resin. In the mixed liquid of the adhesive resin 132, since the conductive material 133 is in granular form, the mixed liquid with the conductive material 133 added needs to be placed in a bead mill, and the grinding beads of the bead mill grind the conductive material 133 and evenly disperse it in the mixed liquid. The anti-settling agent 131 allows the conductive material 133 to be more easily and evenly dispersed in the adhesive resin 132, thereby improving the overall conductive effect. The mixed liquid is then taken out of the bead mill to prepare a liquid phase resin.

Step S2: Take a fiber substrate 11, which may be, for example, natural fiber, synthetic fiber, woven fabric, nonwoven fabric or film, and transport the fiber substrate 11 at a speed of 10-200 m/min. Apply a liquid resin to the outer surface 12 of the fiber substrate 11 by a coating method. Then, through a thickness control procedure, control the thickness of the liquid resin on the outer surface 12 of the fiber substrate 11 to be 5 μm-300 μm.

Step S3: Continuously perform a high temperature carbonization process or a metallization process, subjecting the fiber substrate 11 coated with the liquid phase resin to a first high temperature carbonization treatment or a metallization treatment in a reaction chamber at a temperature of 100°C-180°C, and then stretching the fiber substrate 11, and then transporting it to a reaction chamber at a temperature of 100°C-180°C for a second high temperature carbonization treatment or a metallization treatment, and then stretching the fiber substrate 11, so that the liquid phase resin coated on the outer surface 12 of the fiber substrate 11 is completely cured and fixed, so as to obtain a fiber substrate 11 with a conductive layer 13 on the outer surface 12, and finally the fiber substrate 11 is rolled up and stored by a winder.

In the step S1 of preparing the liquid phase resin, in addition to adding the adhesive resin 132 to the mixture of water and the anti-settling agent 131, a conductive polymer material may be added to increase the electrical performance of the liquid phase resin, as shown in FIG. 3 .

Furthermore, in step S1, a dye can be added at the same time as the conductive material 133 is added. After being mixed and dispersed in a bead mill, the liquid phase resin takes on the color of the dye, so that the conductive layer 13 coated with the fiber substrate 11 has a color, which can be applied to different textile designs, as shown in FIG4 ; wherein the dye is a nylon dye or a polyester dye. The conductive layer 13 with the dye can also be matched with the color of the fiber substrate 11, so that the fiber 1 takes on different colors.

Thus, the conductive layer 13 of the fiber 1 with a conductive layer may include not only the anti-settling agent 131, the adhesive resin 132 and the conductive material 133, but also a conductive polymer material (not shown) and a dye (not shown).

The raw materials used for the liquid resin of the present invention are all water-based, and the liquid resin is coated on the fiber substrate 11 by a coating method, which can avoid the generation of industrial wastewater and does not require the construction of additional equipment to treat industrial wastewater. The preparation method of the present invention has the advantages of both environmental protection and low cost.

The following provides various embodiments to illustrate the application of the anti-settling agent 131 of the liquid resin, the adhesive resin 132, the conductive material 133, the conductive polymer material and the dye of the present invention.

Embodiment 1

The liquid resin of Example 1 includes 65-90 wt % of water, 1-5 wt % of an anti-settling agent 131, 1-5 wt % of a binder resin 132, and 5-15 wt % of a conductive material 133.

Preferably, the composition is 75-85 wt% water, 1.5-3.5 wt% sodium carboxymethyl cellulose, 2-4 wt% water-based rubber and polyacrylic acid resin, and 7-13 wt% multi-walled carbon nanotubes.

The size of the multi-walled carbon nanotubes is 2-200 μm and the color is black. After the high-temperature carbonization process, the conductive layer 13 of the outer surface 12 of the fiber substrate 11 appears black. Therefore, the first embodiment is suitable for matching with a dark fiber substrate 11. If it is matched with a blue or red fiber substrate 11, the color of the fiber 1 is dark blue or dark red.

The fiber substrate 11 is made of dark synthetic fiber PET (Polyethylene terephthalate), which is a synthetic fiber yarn or woven fabric, and is coated with the liquid phase resin of Example 1. Its electrical resistance is 10 ¹ -10 ² Ω/cm, and its color fastness to washing according to the AATCC 61 test standard reaches level 4-5, and its color fastness to light according to the AATCC 16.3 test standard is level 4. Compared with the fiber substrate 11 not coated with the conductive layer 13, the denier number is increased by 10-20%.

Embodiment 2

The liquid resin of Example 2 contains 88.5-98.9 wt % of water, 0.01-2 wt % of an anti-settling agent 131, 1-10 wt % of a binder resin 132, and 0.005-1.0 wt % of a conductive material 133. Example 2 provides four different formulations.

Preferably, the composition is 89.5-97.5 wt% water, 0.03-1.5 wt% naphthalenesulfonic acid formaldehyde condensation polymer sodium salt, 2-6 wt% water-based rubber and unsaturated polyester resin, and 0.006-0.04 wt% single-walled carbon nanotubes.

Preferably, the composition is 89-95 wt% water, 0.05-1.5 wt% naphthalenesulfonic acid formaldehyde condensation polymer sodium salt, 2-8 wt% water-based rubber and unsaturated polyester resin, and 0.008-0.8 wt% single-walled carbon nanotubes.

Preferably, the composition is 90-96 wt% water, 0.02-1.2 wt% sodium carboxymethyl cellulose, 2-8 wt% water-based rubber and unsaturated polyester resin, and 0.01-0.04 wt% single-walled carbon nanotubes.

The preferred composition is 89-96 wt% water, 0.2-1.2 wt% sodium carboxymethyl cellulose, 2-7 wt% waterborne polyurethane and polyester resin, and 0.009-0.8 wt% single-walled carbon nanotubes.

The size of the single-walled carbon nanotubes is 2-200 μm and the color is black. Depending on the amount used and after the high-temperature carbonization process, the conductive layer 13 of the outer surface 12 of the fiber substrate 11 will appear black or light gray. Therefore, if the second embodiment is matched with a blue or red fiber substrate 11, the color of the fiber 1 is dark blue, light blue, dark red or light red.

The fiber substrate 11 is made of a plurality of synthetic fiber PET, which is a synthetic fiber yarn or a woven fabric, and is coated with the liquid phase resin of Example 2. Its electrical resistance is 10 ² -10 ⁷ Ω/cm, and its color fastness to washing according to the AATCC 61 test standard reaches level 4-5, and its color fastness to light according to the AATCC 16.3 test standard is level 4. Compared with the fiber substrate 11 not coated with the conductive layer 13, the denier number is increased by 10-20%.

Embodiment 3

The liquid resin of Example 3 includes 70-90 wt% of water, 0.001-0.5 wt% of an anti-settling agent 131, 1-10 wt% of a binder resin 132, 5-30 wt% of a conductive polymer material, and 0.005-0.05 wt% of a conductive material 133.

The preferred composition is 72-85 wt% water, 0.005-0.3 wt% naphthalenesulfonic acid formaldehyde condensate sodium salt, 2-7 wt% waterborne polyurethane and polyester resin, 10-25 wt% poly(ethylenedioxythiophene):polystyrenesulfonic acid, and 0.009-0.04 wt% single-walled carbon nanotubes.

The amount of single-walled carbon nanotubes in the liquid phase resin is relatively small, and after the high-temperature carbonization process, the conductive layer 13 of the outer surface 12 of the fiber substrate 11 appears light gray. Therefore, the third embodiment can be used with a fiber substrate 11 of any color. If it is used with a blue or red fiber substrate 11, the color of the fiber 1 is light blue or light red.

The fiber substrate 11 is made of a plurality of synthetic fiber PET, which is a synthetic fiber yarn or a woven fabric, and is coated with the liquid phase resin of Example 3. Its electrical resistance is 10 ⁴ -10 ⁵ Ω/cm, and its color fastness to washing according to the AATCC 61 test standard reaches level 4-5, and its color fastness to light according to the AATCC 16.3 test standard is level 4. Compared with the fiber substrate 11 not coated with the conductive layer 13, the denier number is increased by 10-15%.

Embodiment 4

The liquid resin of Example 4 includes 10-20 wt% of water, 0.001-0.5 wt% of an anti-settling agent 131, 1-10 wt% of a bonding resin 132, 70-90 wt% of a conductive polymer material, and 0.005-0.05 wt% of a conductive material 133.

The preferred composition is 12-18 wt% water, 0.005-0.4 wt% naphthalenesulfonic acid formaldehyde condensate sodium salt, 2-8 wt% waterborne polyurethane and polyester resin, 75-88 wt% poly(ethylenedioxythiophene):polystyrenesulfonic acid, and 0.008-0.03 wt% single-walled carbon nanotubes.

The amount of single-walled carbon nanotubes in the liquid phase resin is relatively small, and after the high-temperature carbonization process, the conductive layer 13 of the outer surface 12 of the fiber substrate 11 appears light gray. Therefore, the fourth embodiment can be used with a fiber substrate 11 of any color. If it is used with a blue or red fiber substrate 11, the color of the fiber 1 is light blue or light red.

The fiber substrate 11 is made of a plurality of synthetic fiber PET or PA6 (Polyamide 6), which is a synthetic fiber yarn or woven fabric, and is coated with the liquid phase resin of Example 4. The resistivity is 10 ¹ -10 ³ Ω/cm, the color fastness to washing according to the AATCC 61 test standard reaches level 4-5, and the color fastness to light according to the AATCC 16.3 test standard is level 4. Compared with the fiber substrate 11 not coated with the conductive layer 13, the denier number is increased by 10-20%.

Embodiment 5

The liquid resin of Example 5 includes 10-40 wt % of water, 0.001-0.5 wt % of an anti-settling agent 131, 1-10 wt % of a binder resin 132, 5-20 wt % of a conductive polymer material, 0.001-0.05 wt % of a conductive material 133, and 40-70 wt % of a dye.

Preferably, the composition is 15-35 wt% water, 0.005-0.35 wt% naphthalenesulfonic acid formaldehyde condensate sodium salt, 2-8 wt% waterborne polyurethane and polyester resin, 8-18 wt% poly(ethylenedioxythiophene):polystyrenesulfonic acid, 0.001-0.03 wt% single-walled carbon nanotubes and 45-65 wt% titanium dioxide (TiO ₂ ).

The amount of single-walled carbon nanotubes in the liquid phase resin is relatively small, and titanium dioxide is used as a dye. After a high-temperature carbonization process, the conductive layer 13 on the outer surface 12 of the fiber substrate 11 will appear white. Example 5 is suitable for matching with a white fiber substrate 11.

The fiber substrate 11 is made of white synthetic fiber PET and coated with the liquid resin of Example 5. Its electrical resistance is 10 ⁶ -10 ⁷ Ω/cm, and its color fastness to washing according to the AATCC 61 test standard reaches level 4-5. Its color fastness to light according to the AATCC 16.3 test standard is level 3. Compared with the fiber substrate 11 not coated with the conductive layer 13, its denier number increases by 25-40%.

Embodiment 6

The liquid resin of Example 6 includes 0.1-10 wt% of water, 15-40 wt% of an anti-settling agent 131, 3-15 wt% of a binder resin 132, and 20-80 wt% of a conductive material 133. The conductive material 133 of Example 6 is made of metal particles with a particle size of 0.5-20 μm, such as gold, silver, copper, nickel, tin, cobalt, aluminum, zinc, and tungsten. Example 6 provides three different formulations.

Preferably, the composition comprises 1.5-8.5 wt% of water, 16-36 wt% of γ-butyrolactone, isophorone, n-butyl acetate and ethyl acetate, 4-10 wt% of waterborne polyurethane and polyester resin or polyamide resin, and 50-80 wt% of metal particles, wherein the metal particles are composed of 10-20 wt% of silver and 50-60 wt% of copper.

Preferably, the composition is 2-8 wt% water, 15-35 wt% n-butyl acetate and ethyl acetate, 4-10 wt% waterborne polyurethane and polyester resin or polyamide resin, and 55-75 wt% silver.

Preferably, the composition is 2-8 wt% water, 15-35 wt% n-butyl acetate and ethyl acetate, 4-10 wt% waterborne polyurethane and polyester resin or polyamide resin, and 55-75 wt% copper.

The metal particles have an original metal color. After the metallization process, the conductive layer 13 on the outer surface 12 of the fiber substrate 11 presents the metal color of the selected metal particles. Therefore, if the sixth embodiment is matched with a fiber substrate 11 of any color, the fiber 1 will present the metal color of the selected metal particles.

The fiber substrate 11 is made of a plurality of synthetic fiber PET or PA6, which are synthetic fiber yarns or woven fabrics, and is coated with the liquid phase resin of Example 6. The resistivity is 10 ^-4 -10 ^-1 Ω/cm, the color fastness to washing according to the AATCC 61 test standard reaches level 4-5, and the color fastness to light according to the AATCC 16.3 test standard is level 4. Compared with the fiber substrate 11 not coated with the conductive layer 13, the denier number is increased by 110-120%.

From the above implementation description, it can be seen that compared with the prior art, the present invention has the following advantages:

1. The fiber with a conductive layer and the preparation method thereof of the present invention use aqueous raw materials when configuring the liquid phase resin, and the liquid phase resin is coated on the fiber substrate by a coating method. No electrolyte or other chemical liquids that will generate industrial wastewater are used in the preparation process. Therefore, the present invention will not generate industrial wastewater, and there is no need to set up equipment for treating industrial wastewater in the process equipment, which can reduce the manufacturing cost and provide the fiber coated with a conductive layer in a more environmentally friendly manner.

2. The fiber with a conductive layer and the preparation method thereof of the present invention can be applied to EMI protection, military and police supplies, electronic equipment, smart clothing, aerospace technology, medical peripherals and server computing. The conductive layer of the present invention is completely coated on the outer surface of the fiber substrate, and the subsequent cutting or weaving process will not reduce the coverage of the conductive layer, thereby providing good conductivity.

1: Fiber 11: Fiber substrate 12: Outer surface 13: Conductive layer 131: Anti-settling agent 132: Adhesive resin 133: Conductive material S1~S3: Steps

FIG1 is a structural cross-sectional view of an embodiment of the present invention; FIG2 is a manufacturing flow chart of an embodiment of the present invention; FIG3 is a manufacturing flow chart of a conductive polymer material of an embodiment of the present invention; and FIG4 is a manufacturing flow chart of a dye of an embodiment of the present invention.

1: Fiber

11: Fiber substrate

12: External surface

13:Conductive layer

131: Anti-settling agent

132: Adhesive resin

133: Conductive materials

Claims (17)

A method for preparing a fiber with a conductive layer, the steps of which include: A) uniformly mixing water and an anti-settling agent, adding a bonding resin, and after ultrasonic vibration, adding a conductive material, mixing and dispersing in a bead mill to prepare a liquid phase resin; B) taking a fiber substrate, coating the liquid phase resin on the outer surface of the fiber substrate by coating; and C) performing a high temperature carbonization process or metallization process to solidify the liquid phase resin coated on the outer surface of the fiber substrate. The method for preparing a fiber with a conductive layer as described in claim 1, wherein in step A), the water and the anti-settling agent are mixed evenly, and then a conductive polymer material and the adhesive resin are added. After ultrasonic vibration, the conductive material is added, and after mixing and dispersing in a bead mill, the liquid phase resin is configured. A method for preparing a fiber with a conductive layer as described in claim 2, wherein the conductive polymer material is poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate), PEDOT:PSS. The method for preparing a fiber with a conductive layer as described in claim 1, wherein in step A), the water and the anti-settling agent are mixed evenly, and then the adhesive resin is added. After ultrasonic vibration, the conductive material and a dye are added, and the mixture is further mixed and dispersed in a bead mill to prepare the liquid phase resin. A method for preparing a fiber with a conductive layer as described in claim 1, wherein the fiber substrate is natural fiber, synthetic fiber, woven fabric, non-woven fabric or film, and the fiber substrate is dyed or undyed. The method for preparing a fiber having a conductive layer as claimed in claim 1, wherein the anti-settling agent is at least one selected from the group consisting of sodium carboxyethyl cellulose (CMC), ammonium salt of polycarboxylic acid, polysulfonate, polyether salts, hydrogenated nitrile rubber (H-NBR), sodium salt of polynaphthalene sulphonic acid (NNO), gamma-butyrolactone (GBL), isophorone, butyl acetate and ethyl acetate. A method for preparing a fiber with a conductive layer as described in claim 1, wherein the adhesive resin is at least one selected from the group consisting of waterborne polyurethane, thermoplastic polyurethane, polyester resin, poly(ethyl acrylate)), polyacrylic acid resin, poly(butyl acrylate)), unsaturated polyester resin, polyamide resin, polyvinyl acetate (PVA), water-based rubber and water-based epoxy resin. The method for preparing a fiber with a conductive layer as described in claim 1, wherein the conductive material is single-walled carbon nanotubes, multi-walled carbon nanotubes or metal particles. The method for preparing a fiber with a conductive layer as described in claim 1, wherein the step B) further includes a thickness control procedure to control the thickness of the liquid resin coated on the fiber substrate to be between 5 µm and 300 µm. The method for preparing a fiber having a conductive layer as described in claim 1, wherein the Denier number of the fiber substrate coated with the liquid phase resin is increased by 5-300% compared to the fiber substrate not coated with the liquid phase resin. A method for preparing a fiber with a conductive layer as described in claim 1, wherein the high-temperature carbonization process or metallization process in step C) is to perform a first high-temperature carbonization treatment or metallization treatment in a reaction chamber at a temperature of 100°C-180°C, then stretch the fiber substrate, and then perform a second high-temperature carbonization treatment or metallization treatment in a reaction chamber at a temperature of 100°C-180°C, and then stretch the fiber substrate again to solidify the liquid phase resin coated on the surface of the fiber substrate. A fiber with a conductive layer made by the preparation method described in claim 1, comprising: a fiber substrate having an outer surface; and a conductive layer having an anti-settling agent, a bonding resin and a conductive material, the conductive layer being coated on the outer surface of the fiber substrate, and the conductive material being single-walled carbon nanotubes, multi-walled carbon nanotubes or metal particles. The fiber with a conductive layer as described in claim 12, wherein the thickness of the conductive layer is 5 µm-300 µm. The fiber having a conductive layer as claimed in claim 12, wherein the resistance of the conductive layer is 10 ^-4 -10 ⁸ Ω/cm. The fiber with a conductive layer as described in claim 12, wherein the Denier number of the fiber substrate coated with the conductive layer is increased by 5-300% compared to the fiber substrate not coated with the conductive layer. The fiber having a conductive layer as described in claim 12, wherein the conductive layer further comprises a conductive polymer material. A fiber having a conductive layer as described in claim 12, wherein the conductive layer further comprises a dye.

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